WO2013146483A1 - 透明導電性積層体 - Google Patents
透明導電性積層体 Download PDFInfo
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- WO2013146483A1 WO2013146483A1 PCT/JP2013/057892 JP2013057892W WO2013146483A1 WO 2013146483 A1 WO2013146483 A1 WO 2013146483A1 JP 2013057892 W JP2013057892 W JP 2013057892W WO 2013146483 A1 WO2013146483 A1 WO 2013146483A1
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
- C23C14/086—Oxides of zinc, germanium, cadmium, indium, tin, thallium or bismuth
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/025—Electric or magnetic properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0274—Optical details, e.g. printed circuits comprising integral optical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/102—Oxide or hydroxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/418—Refractive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/208—Touch screens
Definitions
- the present invention relates to a transparent conductive laminate having extremely high visibility.
- Liquid crystal display devices have advantages such as thinness, light weight, and low power consumption, and are used in various fields such as computers, word processors, televisions, mobile phones, and portable information terminal devices.
- touch panels having a mechanism for operating devices by holding down the display on the screen are rapidly spreading.
- a touch panel has, for example, a mobile phone such as a smartphone, a tablet PC, a personal digital assistant device, a bank ATM, a vending machine, a personal digital assistant (PDA), a copying machine, a facsimile machine, and a game machine due to its excellent operability.
- PDA personal digital assistant
- a transparent conductive laminate having a transparent conductive layer provided on a transparent substrate is generally used.
- a base film constituting a film having a transparent conductive layer a film such as a PET film or a polycarbonate film is often used from the viewpoint of high transparency and price.
- These base films may be provided with a transparent hard coat layer for the purpose of improving scratch resistance and durability.
- the transparent conductive layer of the transparent conductive laminate is made of a base film by performing processing such as vacuum deposition, sputtering, CVD, ion plating, and spraying using a metal oxide such as ITO.
- a transparent conductive layer is formed thereon.
- further patterning processing is required.
- by patterning the transparent conductive layer there is a problem that a portion where a transparent conductive layer such as ITO is present can be visually distinguished from a portion where the transparent conductive layer is not present. This greatly reduces the visibility of the touch panel.
- Patent Document 1 discloses a transparent conductive film in which a first transparent dielectric layer and a transparent conductive layer are formed in this order on a transparent substrate.
- the pattern portion and the pattern opening portion are formed by patterning, and the hue a * value and the hue b * value of the reflected light when the pattern portion is irradiated with white light are a * P and b, respectively.
- * P is set to * O immediately below the pattern opening, the relation 0 ⁇
- a transparent conductive film characterized by satisfying the relationship of 5.00 is described (claim 1).
- fills the said characteristic is made
- Patent Document 2 discloses a transparent substrate, a first transparent conductive layer formed on at least one surface of the transparent substrate, a second transparent conductive layer, and an insulating property.
- the second transparent conductive layer and the insulating color difference adjusting layer are formed in that order on the transparent substrate, and the first transparent conductive layer is the second of the insulating color difference adjusting layer.
- a conductive surface formed by patterning on the upper surface opposite to the transparent conductive layer, the conductive surface forming the upper surface opposite to the insulating color difference adjusting layer of the first transparent conductive layer, and the insulating surface forming the upper surface of the insulating color difference adjusting layer A transparent conductive film is described (claim 1).
- the provision of the second transparent conductive layer has achieved a reduction in the difference between high transmittance and visibility ([0014] paragraph, etc.).
- an object of the present invention is to provide a transparent conductive laminate having extremely high visibility.
- the present invention A transparent conductive laminate in which a hard coat layer, a color difference adjusting layer and a transparent conductive layer are sequentially laminated on at least one surface of a transparent polymer substrate,
- Hard coat layer A phenol novolak acrylate having 2 or more acrylate groups, and (B) an aromatic group-containing mono- or poly (meth) having 1 to 2 mol of an alkylene oxide structure having 2 or 3 carbon atoms in the molecule Acrylate compounds,
- a hard coat layer obtained by applying and curing a hard coating composition comprising:
- the phenol novolac acrylate (A) is contained in an amount of 60 to 85 parts by mass and the (meth) acrylate (B) in an amount of 15 to 30 parts by mass with respect to 100 parts by mass of the resin component contained in the hard coating composition.
- the total mass of the particles (ii) and (iii) in the color difference adjusting layer is 0 to 200 parts by mass with respect to 100 parts by mass of the cured resin component (i).
- the reflectance (R1) when the transparent conductive laminate is irradiated with a light source having a wavelength in the range of 500 to 750 nm, and the transparent conductive laminate is made of 12N hydrochloric acid, 16N nitric acid and water with 12N hydrochloric acid: 16N nitric acid: water 3.3: 1.0: In a transparent conductive laminate after being dipped in a strong acid aqueous solution obtained by mixing at a mass ratio of 3: 1.0: 7.6 at 40 ° C. for 3 minutes and then dried.
- the cured resin component (i) of the color difference adjusting layer is an ultraviolet curable resin
- the haze value (H1) of the transparent conductive laminate and the transparent conductive laminate are 12N hydrochloric acid
- 16N nitric acid and water are 12N hydrochloric acid.
- 16N nitric acid: water 3.3: 1.0: 7.6 transparent conductive laminate after being dipped in a strong acid aqueous solution obtained at 40 ° C. for 3 minutes and then dried.
- the difference [Delta] H in the haze value (H2) is preferably 0.3% or less.
- the phenol novolac acrylate (A) is represented by the following formula (I)
- R 1 is H or CH 2 OH
- R 2 is H or OH
- n is 2 to 5
- m is 0 to 5.
- the (meth) acrylate (B) is more preferably an aromatic group-containing (meth) acrylate having a refractive index in the range of 1.56 to 1.64.
- the hard coat layer is further (C) a hard coat layer obtained by applying and curing a hard coating composition comprising a fluorene skeleton-containing (meth) acrylate having two or more (meth) acrylate groups,
- the phenol novolac acrylate (A) is 40 to 70 parts by mass
- the (meth) acrylate (B) is 10 to 30 parts by mass
- the fluorene skeleton (meta) is contained in 100 parts by mass of the resin component contained in the hard coating composition.
- Acrylate (C) is preferably contained in an amount of 15 to 40 parts by mass.
- the total content of ZnO, TiO 2 , CeO 2 , SnO 2 , ZrO 2 and indium-tin oxide contained in the hard coat layer is 0.0001% by mass or less in the hard coat layer. More preferred.
- the refractive index of the hard coat layer is 1.565 to 1.620.
- the cured resin component (i) of the color difference adjusting layer is a (meth) acrylate having a molecular weight of 1400 to 1800 having two or more acrylate groups, and the cured resin component (i) has a hydroxyl value of 60 to 100 mgKOH / g.
- the thickness of the color difference adjusting layer is preferably from 50 nm to 200 nm.
- the transparent conductive layer is a crystalline layer containing indium oxide and the thickness of the transparent conductive layer is 5 to 50 nm.
- a metal oxide layer is present between the color difference adjusting layer and the transparent conductive layer, and the thickness of the metal oxide layer is 0.5 to 5.0 nm.
- the transparent conductive laminate has a hard coat layer, a color difference adjusting layer, and a transparent conductive layer sequentially laminated on one surface of a transparent polymer substrate, and More preferably, an anti-blocking layer is formed on the other surface of the transparent polymer substrate.
- the anti-blocking layer is a layer formed by an anti-blocking layer forming composition containing a first component and a second component,
- the first component includes an unsaturated double bond-containing acrylic copolymer
- the second component includes a polyfunctional acrylate
- the difference ⁇ SP between the SP value (SP1) of the first component and the SP value (SP2) of the second component is in the range of 1 to 2
- a mode in which the first component and the second component undergo phase separation and an anti-blocking layer having fine irregularities on the surface is preferable.
- the present invention further provides a touch panel having the transparent conductive laminate.
- the present invention A transparent conductive laminate in which a high refractive index antiblocking layer, a color difference adjusting layer and a transparent conductive layer are sequentially laminated on at least one surface of a transparent polymer substrate,
- the high refractive index antiblocking layer is a layer formed of an antiblocking layer forming composition containing a first component and a second component,
- the first component is an unsaturated double bond-containing acrylic copolymer
- the second component is (A) A phenol novolak acrylate having 2 or more acrylate groups, and (B) an aromatic group-containing mono- or poly (meth) having 1 to 2 mol of an alkylene oxide structure having 2 or 3 carbon atoms in the molecule Acrylate, Including
- the phenol novolac acrylate (A) is contained in an amount of 60 to 85 parts by mass and the (meth) acrylate (B) in an amount of 15 to 30 parts by mass with respect to 100 parts by mass of the second component.
- the difference ⁇ SP between the SP value (SP1) of the first component and the SP value (SP2) of the second component is in the range of 1 to 4,
- the color difference adjustment layer A cured resin component (i), and metal oxide particles (ii) having an average primary particle size of 100 nm or less and / or metal fluoride particles (iii) having an average primary particle size of 100 nm or less, and in the color difference adjusting layer
- the total mass of the particles (ii) and (iii) is 0 to 200 parts by mass with respect to 100 parts by mass of the cured resin component (i),
- the cured resin component (i) of the color difference adjusting layer is an ultraviolet curable resin
- the haze value (H1) of the transparent conductive laminate and the transparent conductive laminate are 12N hydrochloric acid
- 16N nitric acid and water are 12N hydrochloric acid.
- 16N nitric acid: water 3.3: 1.0: 7.6 transparent conductive laminate after being dipped in a strong acid aqueous solution obtained at 40 ° C. for 3 minutes and then dried.
- the difference [Delta] H in the haze value (H2) is preferably 0.3% or less.
- the phenol novolac acrylate (A) is represented by the following formula (I)
- R 1 is H or CH 2 OH
- R 2 is H or OH
- n is 2 to 5
- m is 0 to 5.
- the (meth) acrylate (B) is preferably an aromatic group-containing (meth) acrylate having a refractive index in the range of 1.56 to 1.64.
- the total content of ZnO, TiO 2 , CeO 2 , SnO 2 , ZrO 2 and indium-tin oxide contained in the high refractive index anti-blocking layer is 0.0001% by mass or less in the anti-blocking layer. Is preferred.
- the high refractive index antiblocking layer has a refractive index of 1.565 to 1.620, and the high refractive index antiblocking layer has an arithmetic average roughness (Ra) of 0.001 to 0.09 ⁇ m.
- the point average roughness (Rz) is preferably 0.01 to 0.5 ⁇ m.
- the high refractive index antiblocking layer has a thickness of 0.05 to 10 ⁇ m.
- the transparent conductive layer is a crystalline layer containing indium oxide and the thickness of the transparent conductive layer is 5 to 50 nm.
- An embodiment in which a metal oxide layer is present between the color difference adjusting layer and the transparent conductive layer and the thickness of the metal oxide layer is 0.5 to 5.0 nm is also preferable.
- a high refractive index anti-blocking layer, a color difference adjusting layer and a transparent conductive layer are sequentially laminated, and An embodiment in which an antiblocking layer is formed on the other surface of the transparent polymer substrate is also preferable.
- the anti-blocking layer is a layer formed by an anti-blocking layer forming composition containing a first component and a second component,
- the first component includes an unsaturated double bond-containing acrylic copolymer
- the second component includes a polyfunctional acrylate
- the difference ⁇ SP between the SP value (SP1) of the first component and the SP value (SP2) of the second component is in the range of 1 to 2
- After coating the anti-blocking layer forming composition it is preferable that the first component and the second component undergo phase separation and an anti-blocking layer having fine irregularities on the surface is formed.
- the present invention also provides a touch panel having the transparent conductive laminate.
- the transparent conductive laminate of the present invention is characterized by extremely high visibility.
- the high visibility in the transparent conductive laminate of the present invention is a layer obtained by curing a specific hard coating composition by a hard coat layer of the transparent conductive laminate, and a color difference adjusting layer. This is achieved by the amount of particles in the specific range.
- a partial load tends to be generated on a base film having a hard coat layer during processing for providing a transparent conductive layer. This partial load causes a reduction in visibility in which a portion where a transparent conductive layer such as ITO is present and a portion where it is not present are visually distinguished.
- the transparent conductive laminate of the present invention is characterized in that this reduction in visibility is eliminated by providing a specific hard coat layer and a color difference adjusting layer.
- the high visibility in the transparent conductive laminate is obtained by curing a specific anti-blocking layer forming composition by the high refractive index anti-blocking layer of the transparent conductive laminate. And the amount of particles in the color difference adjusting layer is within a specific range.
- a partial load tends to be generated on a base film having a high refractive index antiblocking layer during processing for providing a transparent conductive layer. This partial load causes a reduction in visibility in which a portion where a transparent conductive layer such as ITO is present and a portion where it is not present are visually distinguished.
- the transparent conductive laminate of the present invention is characterized in that this reduction in visibility is eliminated by providing a specific high refractive index antiblocking layer and color difference adjusting layer.
- the transparent conductive laminate of the present invention is a transparent conductive laminate in which a hard coat layer, a color difference adjusting layer, and a transparent conductive layer are laminated in this order on at least one surface of a transparent polymer substrate. Each layer which comprises the transparent conductive laminated body of this invention is demonstrated.
- the transparent polymer substrate used in the transparent conductive laminate of the present invention includes, for example, a polycarbonate film, a polyester film such as polyethylene terephthalate and polyethylene naphthalate; and a cellulose film such as diacetyl cellulose and triacetyl cellulose.
- Film examples thereof include a substrate made of a transparent polymer such as an acrylic film such as polymethyl methacrylate.
- the transparent polymer substrate used in the transparent conductive laminate of the present invention includes polystyrene, acrylonitrile / styrene copolymer and other styrene films; polyvinyl chloride, polyethylene, polypropylene, polyolefin having a cyclic or norbornene structure, Examples thereof include substrates made of transparent polymers such as olefin films such as ethylene / propylene copolymers; amide films such as nylon and aromatic polyamide.
- transparent polymer substrate used in the transparent conductive laminate of the present invention polyimide, polysulfone, polyethersulfone, polyetheretherketone, polyphenylene sulfide, polyvinyl alcohol, polyvinylidene chloride, polyvinyl butyral, polyarylate
- transparent polymers such as polyoxymethylene, epoxy resins, and blends of the above polymers.
- transparent polymers polycarbonate and polyethylene terephthalate are particularly preferable from the viewpoints of transparency, heat resistance, and versatility.
- the transparent conductive laminate of the present invention among these transparent polymer base materials, those having a low optical birefringence, or a phase difference of 1/4 ( ⁇ / 4) or wavelength of the wavelength (for example, 550 nm) can be selected as appropriate according to the intended use, and those having birefringence not controlled at all can be selected.
- those having a low optical birefringence, or a phase difference of 1/4 ( ⁇ / 4) or wavelength of the wavelength (for example, 550 nm)
- those having birefringence not controlled at all can be selected.
- polarized light such as linearly polarized light, elliptically polarized light, circularly polarized light, etc.
- a case where the transparent conductive laminate of the present invention is used together with a display exhibiting a function can be given.
- the thickness of the transparent polymer substrate can be appropriately determined, but is generally about 10 to 500 ⁇ m, particularly 20 to 300 ⁇ m, more preferably 30 to 200 ⁇ m, from the viewpoint of workability such as strength and handleability. .
- Hard coat layer The hard coat layer possessed by the transparent conductive laminate of the present invention comprises: (A) a phenol novolak acrylate having 2 or more acrylate groups, and (B) a mono- or poly (meth) acrylate compound having 1 to 2 mol of alkylene oxide structure having 2 or 3 carbon atoms in the molecule, Optionally, (C) a fluorene skeleton-containing (meth) acrylate having 2 or more (meth) acrylate groups, It is the hard-coat layer obtained by painting and hardening the hard-coating composition containing this.
- the phenol novolac acrylate (A) is 60 to 85 parts by mass and 100 parts by mass of the resin component contained in the hard coating composition.
- the condition is that the (meth) acrylate (B) is contained in an amount of 15 to 30 parts by mass.
- the phenol novolac acrylate (A) is 40 to 70 parts by mass with respect to 100 parts by mass of the resin component contained in the hard coating composition.
- the (meth) acrylate (B) is contained in an amount of 10 to 30 parts by mass and the fluorene skeleton-containing (meth) acrylate (C) is contained in an amount of 15 to 40 parts by mass.
- the hard coating composition comprises (A) a phenol novolac acrylate having 2 or more acrylate groups.
- the hard coating composition contains the phenol novolac acrylate (A)
- the resulting hard coat layer becomes a high refractive index layer that is transparent and has high hardness. Thereby, generation
- Phenol novolac acrylate (A) is represented by the following formula (I)
- R 1 is H or CH 2 OH
- R 2 is H or OH
- n is 2 to 5
- m is 0 to 5.
- n is preferably 2 to 4
- m is preferably 0 to 3
- more preferably n is 2 to 4
- m is more preferably 0 to 1.
- the weight average molecular weight of the phenol novolac acrylate (A) is preferably 400 to 2500, more preferably 450 to 2000.
- the hydroxyl value of the phenol novolac acrylate (A) is preferably from 100 to 180 mgKOH / g, more preferably from 120 to 160 mgKOH / g.
- the weight average molecular weight of each component can be measured by a gel permeation chromatography method.
- a high-speed GPC device such as HLC-8220 GPC (manufactured by Tosoh Corporation) can be used.
- HLC-8220GPC manufactured by Tosoh Corporation
- 2 g of a test sample was weighed and treated in a vacuum dryer at 40 ° C. for 2 hours to remove moisture, and then a THF solution. And a measurement is performed under the conditions of a column injection amount: 10 ⁇ l and a flow rate: 0.35 ml / min.
- the phenol novolac acrylate (A) is provided on the condition that it is contained in an amount of 60 to 85 parts by mass with respect to 100 parts by mass of the resin component contained in the hard coating composition.
- the amount of the phenol novolac acrylate (A) is less than 60 parts by mass and when the amount of the phenol novolac acrylate (A) exceeds 85 parts by mass, the hardness of the resulting hard coat layer is low. There is a bug.
- (B) Aromatic group-containing mono- or poly (meth) acrylate compound having 1 to 2 mol of alkylene oxide structure having 2 or 3 carbon atoms in the molecule.
- the hard coating composition comprises (B) alkylene having 2 or 3 carbon atoms.
- An aromatic group-containing mono- or poly (meth) acrylate having an oxide structure of 1 to 2 mol in the molecule is included.
- the (meth) acrylate (B) preferably has a viscosity of less than 300 mPa ⁇ s and a refractive index in the range of 1.56 to 1.64.
- the viscosity of component (B) it is possible to design the viscosity of component (B) to be less than 300 mPa ⁇ s by including 1-2 mol of an alkylene oxide structure having 2 or 3 carbon atoms in the molecule. Become. Further, in the (meth) acrylate of the component (B), when the alkylene oxide structure having 2 or 3 carbon atoms is contained in the molecule in an amount of 1 to 2 mol, the extensibility of the obtained hard coat layer is improved.
- examples of the “alkylene structure having 2 or 3 carbon atoms” include an ethylene oxide structure and a propylene oxide structure.
- Component (B) (meth) acrylate is further characterized by having an aromatic group.
- a high refractive index such as a refractive index in the range of 1.56 to 1.64 is achieved.
- Examples of the aromatic group-containing (meth) acrylate that can be preferably used as the component (B) in the present invention include, for example, an alkyleneoxylated phenol (meth) having 1 to 2 mol of an alkylene oxide structure having 2 or 3 carbon atoms in the molecule.
- Examples include acrylate, alkyleneoxylated orthophenylphenol (meth) acrylate, alkyleneoxylated metaphenylphenol (meth) acrylate, alkyleneoxylated paraphenylphenol (meth) acrylate, and alkyleneoxylated cumylphenol (meth) acrylate.
- (meth) acrylate having two aromatic groups is more preferable in that it has a high refractive index.
- the refractive index of component (B) can be measured with an Abbe refractometer by a method based on JIS K0062.
- the viscosity of the component (B) is preferably less than 300 mPa ⁇ s.
- the viscosity of component (B) is more preferably in the range of 1 to 300 mPa ⁇ s, still more preferably in the range of 1 to 200 mPa ⁇ s.
- the viscosity of component (B) can be measured with a B-type viscometer (TVB-22L, manufactured by Toki Sangyo Co., Ltd.).
- B-type viscometer examples include TVB-22L (manufactured by Toki Sangyo Co., Ltd.).
- Component (B) preferably has a weight average molecular weight in the range of 150 to 600, and more preferably in the range of 200 to 400.
- the component (B) is contained in an amount of 15 to 30 parts by mass with respect to 100 parts by mass of the resin component contained in the hard coating composition.
- the (meth) acrylate (B) is contained in the hard coating composition in the above mass range, there is an advantage that the obtained hard coat layer has high hardness and high refractive index.
- the amount of the component (B) is less than 15 parts by mass and when the amount of the component (B) exceeds 30 parts by mass, there is a problem that the hardness of the obtained hard coat layer is lowered.
- (C) A fluorene skeleton-containing (meth) acrylate having two or more (meth) acrylate groups
- the hard coating composition in addition to the components (A) and (B), two or more The aspect which further contains the fluorene skeleton containing (meth) acrylate (C) which has (meth) acrylate group of this is mentioned. Since the fluorene skeleton-containing (meth) acrylate (C) has a high refractive index, there is an advantage that the refractive index of the obtained hard coat layer can be set high.
- each R 3 is independently H or CH 3 ;
- A is independently, -OCH 2 CH 2 -, - OCH 2 CH 2 CH 2 -, - OCH (CH 3) CH 2 — Or —OCH 2 CH (CH 3 ) —, and each R is independently H or CH 3 .
- a more preferred example of the fluorene skeleton-containing (meth) acrylate (C) is an acrylate monomer represented by the following formula (II) -1.
- (II) -1 [In the above formula (II) -1, each R represents a hydrogen atom or a methyl group, and m and n each independently represents an integer of 1 to 5. ]
- fluorene skeleton-containing (meth) acrylate (C) a commercially available product may be used.
- the commercially available fluorene skeleton-containing (meth) acrylate (C) include the NK ester series marketed by Shin-Nakamura Chemical Co., Ltd. and the Ogsol EA series marketed by Osaka Gas Chemical Co., Ltd.
- the phenol novolac acrylate (A) is 40 to 70 parts by mass with respect to 100 parts by mass of the resin component contained in the hard coating composition.
- Parts, (meth) acrylate (B) is contained in an amount of 10 to 30 parts by mass
- fluorene skeleton-containing (meth) acrylate (C) is contained in an amount of 15 to 40 parts by mass.
- the phenol novolac acrylate (A) is 40 parts by mass with respect to 100 parts by mass of the resin component contained in the hard coating composition. It is necessary to contain ⁇ 70 parts by mass.
- the amount of the phenol novolac acrylate (A) is less than 40 parts by mass and when the amount of the phenol novolac acrylate (A) exceeds 70 parts by mass, the hardness of the obtained hard coat layer is low. There is a bug.
- the (meth) acrylate of the component (B) is based on 100 parts by mass of the resin component contained in the hard coating composition. It is necessary to contain 10 to 30 parts by mass.
- the (meth) acrylate (B) is contained in the hard coating composition in the above mass range, there is an advantage that the obtained hard coat layer has high hardness and high refractive index.
- the amount of the component (B) is less than 10 parts by mass and when the amount of the component (B) exceeds 30 parts by mass, there is a problem that the hardness of the obtained hard coat layer is lowered.
- the component (C) When the fluorene skeleton-containing (meth) acrylate of the component (C) is contained in the hard coat coating composition, the component (C) is contained in 15 to 40 parts by mass with respect to 100 parts by mass of the resin component contained in the hard coating composition. On condition that When the amount of the component (C) exceeds 40 parts by mass, the hardness of the obtained hard coat layer may be lowered.
- the hard coating composition may contain other (meth) acrylates in addition to the components (A) and (B) and, if necessary, the component (C).
- examples of such (meth) acrylates include polyfunctional (meth) acrylate monomers and / or oligomer compounds. These polyfunctional (meth) acrylate monomers and / or oligomer compounds have a high hardness due to a curing reaction based on the reaction of (meth) acryloyl groups by irradiation with active energy rays after the hard coating composition is applied. There is an advantage that a hard coat layer can be obtained.
- the polyfunctional (meth) acrylate monomer and / or oligomer compound preferably has two or more (meth) acryloyl groups.
- two or more (meth) acryloyl groups there is an advantage that a hard coat layer having high hardness can be obtained after irradiation with active energy rays.
- polyfunctional (meth) acrylate monomer and / or oligomer compound include, for example, hydroxypropylated trimethylolpropane triacrylate, isocyanuric acid ethylene oxide modified diacrylate, pentaerythritol triacrylate, dipentaerythritol pentaacrylate, and trimethylolpropane triacrylate.
- examples thereof include acrylate, tris (acryloxyethyl) isocyanurate, ditrimethylolpropane tetraacrylate, pentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, and oligomers thereof. These monomers or oligomers may be used alone or in combination of two or more.
- the hard coating composition contains other (meth) acrylates, it is preferably in the range of 1 to 30 parts by mass with respect to 100 parts by mass of the resin component contained in the hard coating composition. More preferably, it is in the range of parts by mass.
- the hard coating composition such as a photopolymerization initiator preferably contains a photopolymerization initiator. Due to the presence of the photopolymerization initiator, the resin component is favorably polymerized by irradiation with active energy rays such as ultraviolet rays.
- photopolymerization initiators include alkylphenone photopolymerization initiators, acylphosphine oxide photopolymerization initiators, titanocene photopolymerization initiators, and oxime ester polymerization initiators.
- alkylphenone photopolymerization initiators examples include 2,2-dimethoxy-1,2-diphenylethane-1-one, 1-hydroxy-cyclohexyl-phenyl-ketone, and 2-hydroxy-2-methyl-1-phenyl-propane.
- acylphosphine oxide photopolymerization initiator examples include 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, and the like.
- titanocene photopolymerization initiators include bis ( ⁇ 5-2,4-cyclopentadien-1-yl) -bis (2,6-difluoro-3- (1H-pyrrol-1-yl) -phenyl) titanium Is mentioned.
- Examples of the oxime ester polymerization initiator include 1.2-octanedione, 1- [4- (phenylthio)-, 2- (O-benzoyloxime)], ethanone, 1- [9-ethyl-6- (2 -Methylbenzoyl) -9H-carbazol-3-yl]-, 1- (0-acetyloxime), oxyphenylacetic acid, 2- [2-oxo-2-phenylacetoxyethoxy] ethyl ester, 2- (2-hydroxy And ethoxy) ethyl ester.
- These photoinitiators may be used individually by 1 type, and may use 2 or more types together.
- a preferable amount of the photopolymerization initiator is 100 masses of the above components (A) and (B) and, if necessary, the component (C) and other (meth) acrylates (these are collectively referred to as “resin component”). Part to 0.01 part by weight, more preferably 1 to 10 parts by weight.
- the hard coating composition used in the present invention may contain a solvent.
- the solvent is not particularly limited, and can be appropriately selected in consideration of the components contained in the composition, the type of base material to be coated, the coating method of the composition, and the like.
- Specific examples of the solvent that can be used include aromatic solvents such as toluene and xylene; ketone solvents such as methyl ethyl ketone, acetone, methyl isobutyl ketone, and cyclohexanone; diethyl ether, isopropyl ether, tetrahydrofuran, dioxane, and ethylene glycol.
- Ether solvents such as dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, propylene glycol monomethyl ether, anisole and phenetol; ester solvents such as ethyl acetate, butyl acetate, isopropyl acetate and ethylene glycol diacetate; dimethylformamide, Amide solvents such as diethylformamide and N-methylpyrrolidone; methyl Cellosolve, ethyl cellosolve, cellosolve solvents such as butyl cellosolve; methanol, ethanol, alcohol solvents such as propanol; and the like; dichloromethane, halogenated solvents such as chloroform. These solvents may be used alone or in combination of two or more. Of these solvents, ester solvents, ether solvents, alcohol solvents and ketone solvents are preferably used.
- the hard coating composition may contain various additives as required.
- additives include conventional additives such as antistatic agents, plasticizers, surfactants, and antioxidants.
- the hard coating composition is high even if it does not contain a high refractive index agent composed of a metal oxide such as ZnO, TiO 2 , CeO 2 , SnO 2 , ZrO 2 or indium-tin oxide due to the above configuration. It is characterized in that a hard coat layer having a refractive index can be formed. Therefore, the hard coating composition preferably does not contain a high refractive index agent such as a metal oxide selected from the group consisting of ZnO, TiO 2 , CeO 2 , SnO 2 , ZrO 2 and indium-tin oxide. .
- the total content of ZnO, TiO 2 , CeO 2 , SnO 2 , ZrO 2 and indium-tin oxide contained in the hard coat layer formed using the hard coating composition is the hard coat layer.
- the content is preferably 0.0001% by mass or less. This is because when a high refractive index agent such as a metal oxide is present in the hard coat layer, the stretchability and the bending resistance are generally inferior as compared with the layer containing only the resin component.
- the hard coat layer formed using the above hard coating composition has a good hardness as a hard coat layer and a high refractive index of 1.565 to 1.620. Since the hard coat layer has such a high refractive index, there is an advantage that the generation of interference fringes can be satisfactorily suppressed in the transparent conductive laminate.
- the hard coat layer provided using the hard coating composition is characterized by having high extensibility in addition to the performance required for the hard coat layer such as high visibility and good hardness. And this high extensibility has the advantage that the visibility of the transparent conductive laminate is dramatically improved.
- a partial load tends to be generated on a base film having a hard coat layer during processing for providing a transparent conductive layer.
- the film swells or twists based on the difference in thermal shrinkage / thermal expansion between the hard coat layer and the base film. There is.
- the waviness / twisting of these films brings about a decrease in visibility in which a portion where a transparent conductive layer such as ITO is present and a portion where it is not present are visually distinguished. This greatly reduces visibility in a touch panel or the like.
- the hard coat layer provided using the hard coating composition used in the present invention is characterized by having high extensibility in addition to the performance required for the hard coat layer such as high visibility and good hardness. Since the hard coat layer in the present invention has high extensibility, the hard coat layer follows well even when the base film is locally thermally expanded by heating in the stage of providing the transparent conductive layer. As a result, there is an advantage that the problem of reduced visibility in which the portion where the transparent conductive layer such as ITO is present and the portion where the transparent conductive layer is not present is visually distinguished is eliminated.
- the transparent conductive laminate of the present invention has a color difference adjusting layer on the hard coat layer. That is, the color difference adjusting layer is a layer existing between the hard coat layer and the transparent conductive layer. This color difference adjusting layer may be a single layer or a layer composed of two or more layers.
- the color difference adjusting layer is a layer for improving adhesion between layers and optical characteristics (such as transmittance and color tone) of the transparent conductive laminate.
- this color difference adjusting layer is Cured resin component (i) and metal oxide particles (ii) having an average primary particle size of 100 nm or less and / or metal fluoride particles (iii) having an average primary particle size of 100 nm or less It is a layer containing.
- the total mass of the particles (ii) and (iii) in the color difference adjusting layer is conditional on being in the range of 0 to 200 parts by mass with respect to 100 parts by mass of the cured resin component (i).
- an ultraviolet curable resin or a thermosetting resin can be used as the curable resin component (i).
- an ultraviolet curable resin can be obtained by a composition containing a monomer having ultraviolet curing performance.
- the monomer having ultraviolet curing performance include monofunctional and polyfunctional acrylates such as polyol acrylate, polyester acrylate, urethane acrylate, epoxy acrylate, modified styrene acrylate, melamine acrylate, and silicon-containing acrylate.
- Specific monomers include, for example, trimethylolpropane trimethacrylate, trimethylolpropane ethylene oxide modified acrylate, trimethylolpropane propylene oxide modified acrylate, isocyanuric acid alkylene oxide modified acrylate, pentaerythritol triacrylate, dipentaerythritol hexaacrylate, Multifunctional monomers such as methylol tricyclodecane diacrylate, tripropylene glycol triacrylate, diethylene glycol diacrylate, 1,6-hexanediol diacrylate, epoxy-modified acrylate, urethane-modified acrylate such as urethane (meth) acrylate, and epoxy-modified acrylate Can be mentioned.
- urethane-modified acrylate is preferable.
- a commercially available product can be used as the urethane-modified acrylate.
- a purple light series manufactured by Nippon Synthetic Chemical Industry Co., Ltd. for example, UV1700B, UV6300B, UV765B, UV7640B, UV7600B, etc .; Art Resin series manufactured by Negami Industrial Co., Ltd.
- Ebecryl series made by Daicel UCB Co., Ltd., For example, 1290, 5129, 254, 264, 265, 1259, 1264, 4866, 9260, 8210, 204, 205, 6602, 220, 4450, etc .; Beam set series manufactured by Arakawa Chemical Industries, Ltd., for example, 371, 371MLV 371S, 577, 577BV, 577AK, etc .; RQ series manufactured by Mitsubishi Rayon Co., Ltd .; Unidic series manufactured by DIC Corporation, etc .; DPHA40H (manufactured by Nippon Kayaku Co., Ltd.), CN9006, CN968 (made by SARTOMER) ) Etc. can be used.
- the curable resin of the color difference adjusting layer is 2 or more
- the molecular weight is 1400 to 1800 having an acrylate group, and the hydroxyl value is preferably 60 to 80 mg.
- the cured resin component (i) has an acrylate group having a molecular weight of 1400 to 1800 and two or more acrylate groups, the acrylate equivalent is maintained so as not to exceed 900.
- the hydroxyl value is not adjusted to an extremely high value of 60 to 100 mgKOH / g, the deterioration of the color difference adjusting layer in the etching process of the conductive laminate is prevented, and the deterioration of the color difference adjusting layer is caused. A reduction in visibility can be prevented.
- the hydroxyl value of the cured resin component (i) is 60 to 100 mg, the hydroxyl groups of the hard coat layer and the color difference adjusting layer each form a hydrogen bond, and poor adhesion when the color difference adjusting layer is laminated on the hard coat layer Can be eliminated.
- the hydroxyl value of the cured resin component (i) is 60 to 100 mg
- the metal oxide layer forming the transparent conductive layer and the hydroxyl group of the color difference adjusting layer form a hydrogen bond
- the transparent conductive layer is laminated on the color difference adjusting layer. The adhesion failure at the time of making it possible can be eliminated.
- the maximum breaking elongation when the cured resin component (i) is cured to a thickness of 100 ⁇ m is preferably 100% or more. Because the maximum elongation at break when cured to a thickness of 100 ⁇ m is 100% or more, when the color difference adjusting layer is laminated on the hard coat layer, the color difference is adjusted with respect to the volume change of the hard coat layer. Since the layer exhibits sufficient followability, adhesion failure when the color difference adjustment layer is laminated on the hard coat layer can be eliminated, and when the transparent conductive layer is laminated on the color difference adjustment layer Since the color difference adjusting layer exhibits sufficient followability to the volume change of the transparent conductive layer, it is possible to eliminate poor adhesion when the color difference adjusting layer is laminated on the transparent conductive layer.
- the maximum elongation at break when cured to a thickness of 100 ⁇ m is preferably from 100 to 150%, more preferably from 110 to 140%.
- the maximum elongation at break when the cured resin component (i) was UV-cured at 100 ⁇ m was measured according to JIS-C-2151. Specifically, using a tensile tester, the sample was pulled at a speed of 200 mm / min, and the elongation percentage when the sample was cut (broken) was determined.
- test piece used for the measurement was a solution obtained by adding 5 parts by mass of Irgacure 184D and 70 parts by mass of methyl isobutyl ketone to 100 parts by mass of the cured resin component (i), with an application amount of 166 ⁇ m using an applicator. After coating on a Teflon sheet and drying at 80 ° C. for 10 minutes, it was cured by irradiating with 3J ultraviolet rays with a high-pressure mercury lamp, and peeled off from the Teflon sheet to obtain a test piece.
- the hydroxyl value of the cured resin component (i) is preferably higher for adhesion between the hard coat layer and the transparent conductive layer, while maintaining resistance to pattern etching treatment of the conductive laminate. Is preferably lower. Therefore, 60 to 100 mg KOH / g is preferable, and a range of 70 to 90 is more preferable.
- the number of acrylate groups and the molecular weight of the cured resin component (i) are preferably a small number of acrylate groups and a large molecular weight in order to maintain flexibility for adhesion to the hard coat layer and the transparent conductive layer.
- the number of acrylate groups is preferably 2 or more, more preferably 2 to 4.
- the molecular weight is preferably 1400 to 1800, more preferably 1500 to 1700.
- the cured resin component (i) is, for example, a hydroxy group-containing acrylate such as 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxybutyl acrylate, 4-hydroxybutyl acrylate, phenoxyhydroxypropyl acrylate, or a lactone-modified product such as the above compound ,
- an acid anhydride such as phthalic anhydride, maleic anhydride, succinic anhydride, hexahydrophthalic anhydride, dodecenyl succinic anhydride, dodecenyl phthalic anhydride, etc.
- an alkylene oxide modified product such as ethylene oxide or propylene oxide
- bisphenol A type epoxy resin, bisphenol S type epoxy resin, bisphenol F type epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy Shi resin, 3,4-epoxy-6-methylcyclohexyl-methyl-3,4-epoxy - can be obtained by an addition to the acid
- the composition forming the color difference adjusting layer preferably contains a photopolymerization initiator.
- a photopolymerization initiator commonly used photopolymerization initiators such as acetophenone, benzophenone, benzoin, benzoylbenzoate, and thioxanthone can be used.
- the composition forming the color difference adjusting layer may further contain a photosensitizer.
- the photosensitizer for example, commonly used photosensitizers such as triethylamine and tri-n-butylphosphine can be used.
- the composition forming the color difference adjusting layer may further contain hydrolysates of various alkoxysilanes.
- the composition for forming the color difference adjusting layer is an organosilane thermosetting monomer having a silane compound such as methyltriethoxysilane or phenyltriethoxysilane as a monomer.
- a thermosetting monomer such as a melamine thermosetting monomer, an isocyanate thermosetting monomer, a phenol thermosetting monomer, or an epoxy thermosetting monomer using a monomer or etherified methylol melamine as a monomer may be included.
- thermosetting monomers may be used alone or in combination of two or more. In addition to the said thermosetting monomer, you may contain the thermoplastic resin component as needed.
- the composition forming the color difference adjusting layer preferably contains a reaction accelerator or a curing agent.
- the reaction accelerator include triethylenediamine, dibutyltin dilaurate, benzylmethylamine, pyridine and the like.
- the curing agent include methylhexahydrophthalic anhydride, 4,4'-diaminodiphenylmethane, 4,4'-diamino-3,3'-diethyldiphenylmethane, diaminodiphenylsulfone and the like.
- the color difference adjusting layer in addition to the cured resin component (i), includes metal oxide particles (ii) having an average primary particle diameter of 100 nm or less and / or metal fluoride particles having an average primary particle diameter of 100 nm or less. (Iii) is included. The total mass of these particles (ii) and (iii) is within the range of 0 to 200 parts by mass with respect to 100 parts by mass of the cured resin component (i).
- the total mass of the particles (ii) and (iii) can be appropriately adjusted according to the refractive index of each of (i), (ii) and (iii) in order to obtain desired optical properties, but from the viewpoint of film strength after curing
- the total mass of the particles (ii) and (iii) in the color difference adjusting layer exceeds 200 parts by mass, there is a problem that interlayer adhesion is poor.
- the metal oxide particles (ii) include ZnO, TiO 2 , CeO 2 , SnO 2 , ZrO 2 and indium-tin oxide. All of these metal oxide particles (ii) are characterized by having a high refractive index. Therefore, the color difference adjusting layer containing the metal oxide particles (ii) is basically a high refractive index layer. As the metal oxide particles (ii), ZnO, TiO 2 and ZrO 2 are more preferably used. As the metal oxide particles (ii), one type may be used alone, or two or more types may be used in combination.
- all of these metal oxide particles (ii) are on condition that an average primary particle diameter is 100 nm or less.
- the average primary particle diameter exceeds 100 nm, the size is easily visible due to aggregation of particles during the formation of the color difference adjusting layer, so that there are problems such as an increase in haze value or a foreign appearance defect.
- the average primary particle size represents a 50% volume particle size when a liquid in which particles are dispersed in a solvent such as n-BuOH is measured with a particle size distribution meter.
- metal constituting the metal fluoride particles (iii) include calcium, barium, magnesium, strontium and the like. Among these metals, magnesium is more preferable. These metal fluoride particles (iii) may be used alone or in combination of two or more. If necessary, the metal fluoride particles (iii) and SiO 2 may be used in combination.
- the color difference adjusting layer containing the metal fluoride particles (iii) is basically a low refractive index layer.
- all of these metal fluoride particles (iii) are on condition that an average primary particle diameter is 100 nm or less. When the average primary particle diameter exceeds 100 nm, the size is easily visible due to aggregation of particles during the formation of the color difference adjusting layer, so that there are problems such as an increase in haze value or a foreign appearance defect.
- the color difference adjusting layer in the present invention may be composed of one layer or may be composed of two or more layers.
- the color difference adjusting layer is a single layer, it is preferably a high refractive index layer containing the metal oxide particles (ii).
- the aspect containing both the said metal oxide particle (ii) and metal fluoride particle (iii) is mentioned, for example.
- the thickness of the color difference adjusting layer is preferably 30 to 300 nm, more preferably 50 nm to 200 nm.
- the color difference adjusting layer when it is two layers, it has a two-layer structure including a high refractive index layer containing the metal oxide particles (ii) and a low refractive index layer containing the metal fluoride particles (iii). Is preferred. In this case, it is more preferable that the hard coat layer and the high refractive index layer are in contact with each other.
- the total thickness of the color difference adjusting layer is preferably 30 to 300 nm, preferably 50 nm to 200 nm. More preferably.
- the color difference adjusting layer is formed by, for example, converting a composition containing a monomer having ultraviolet curing performance and the metal oxide particles (ii) and / or metal fluoride particles (iii) into a transparent polymer group having a hard coat layer. It can be formed by coating on a hard coat layer of the material and then irradiating and curing with an active energy ray such as ultraviolet rays. Alternatively, a composition containing a thermosetting monomer and the metal oxide particles (ii) and / or metal fluoride particles (iii) is applied onto the hard coat layer of a transparent polymer substrate having a hard coat layer. Then, it can be formed by heat curing.
- the color difference adjusting layer has two layers
- a composition containing metal oxide particles (ii) is coated on a hard coat layer and cured, and then a composition containing metal fluoride particles (iii).
- a color difference adjusting layer composed of two layers can be formed.
- a composition containing metal fluoride particles (iii) is coated and cured, and then a composition containing metal oxide particles (ii) is hardened.
- a color difference adjusting layer comprising two layers can be formed.
- a coating method using a coating machine usually used by those skilled in the art such as a doctor knife, bar coater, gravure roll coater, curtain coater, knife coater, spin coater, a coating method using a spray, Examples of the coating method include immersion.
- the composition may contain an organic solvent as required.
- organic solvents include alcohol solvents such as ethanol, isopropyl alcohol, butanol and 1-methoxy-2-propanol, hydrocarbon solvents such as hexane, cyclohexane, ligroin and cyclohexanone, and ketone solvents such as methyl isobutyl ketone and isobutyl acetate.
- aromatic solvents such as solvents, xylene and toluene.
- this curing can be performed by irradiating with a light source that emits an active energy ray having a wavelength as required.
- a light source that emits an active energy ray having a wavelength as required.
- the active energy ray to be irradiated for example, light having an exposure dose of 0.1 to 1.5 J / cm 2 , preferably 0.3 to 1.5 J / cm 2 can be used.
- the wavelength of the irradiation light is not particularly limited, and for example, irradiation light having a wavelength of 360 nm or less can be used. Such light can be obtained using a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like.
- the composition containing the thermosetting monomer when cured, for example, it can be cured by heating at 60 to 140 ° C. for 1 to 60 minutes.
- the heating temperature and the heating time can be selected according to the type of the thermosetting monomer contained in the composition.
- a metal oxide layer may be formed between the color difference adjusting layer and the transparent conductive layer as necessary.
- components constituting the metal oxide layer include metal oxides such as silicon oxide, aluminum oxide, titanium oxide, magnesium oxide, zinc oxide, indium oxide, and tin oxide.
- the metal oxide layer include a layer having a thickness of 0.5 to 5.0 nm.
- the adhesion between the layers can be improved.
- the presence of the metal oxide layer has an advantage that the performance such as durability of the laminate is improved.
- the metal oxide layer can be formed by a known method.
- a method for forming the metal oxide layer for example, a physical formation method such as a DC magnetron sputtering method, an RF magnetron sputtering method, an ion plating method, a vacuum deposition method, or a pulse laser deposition method (Physical Vapor Deposition, hereinafter referred to as “PVD method”).
- PVD method Physical Vapor Deposition
- the DC magnetron sputtering method which can form a metal oxide layer with a uniform thickness and is excellent in industrial production, is particularly preferable.
- chemical formation methods such as Chemical Vapor Deposition (hereinafter referred to as “CVD method”) and sol-gel method can also be used.
- the target used in the sputtering method is preferably a metal target.
- a reactive sputtering method is widely used. This is because it is difficult to use the DC magnetron sputtering method in the case of a metal oxide target because an oxide of an element used as a metal oxide layer is often an insulator.
- a pseudo RF magnetron sputtering method in which formation of an insulator on the target is suppressed by discharging the two cathodes simultaneously can also be used.
- a transparent conductive layer is formed on a color difference adjusting layer or a metal oxide layer.
- the constituent material of the transparent conductive layer is not particularly limited, and examples thereof include a metal layer or a metal compound layer.
- the component constituting the transparent conductive layer include metal oxide layers such as silicon oxide, aluminum oxide, titanium oxide, magnesium oxide, zinc oxide, indium oxide, and tin oxide.
- a crystalline layer mainly composed of indium oxide is preferable, and a layer made of crystalline ITO (Indium Tin Oxide) is particularly preferably used.
- the transparent conductive layer is crystalline ITO, the crystal grain size need not be particularly limited, but is preferably 500 nm or less.
- the crystal grain size exceeds 500 nm, the bending durability deteriorates, which is not preferable.
- the crystal grain size is defined as the largest diagonal line or diameter in each polygonal or oval region observed under a transmission electron microscope (TEM).
- TEM transmission electron microscope
- the transparent conductive layer can be formed by a known method, for example, a physical forming method such as a DC magnetron sputtering method, an RF magnetron sputtering method, an ion plating method, a vacuum deposition method, a pulse laser deposition method, etc. Can be used. Focusing on industrial productivity of forming a metal compound layer having a uniform film thickness over a large area, the DC magnetron sputtering method is desirable. In addition to the physical formation method (PVD), a chemical formation method such as a chemical vapor deposition method or a sol-gel method can be used, but the sputtering method is desirable from the viewpoint of film thickness control.
- PVD physical formation method
- a chemical formation method such as a chemical vapor deposition method or a sol-gel method can be used, but the sputtering method is desirable from the viewpoint of film thickness control.
- the film thickness of the transparent conductive layer is preferably 5 to 50 nm from the viewpoint of transparency and conductivity. More preferably, it is 5 to 30 nm. If the thickness of the transparent conductive layer is less than 5 nm, the resistance value tends to be inferior in stability with time. If the thickness exceeds 50 nm, the bending durability is lowered and coloring due to the transparent conductive layer becomes strong.
- the surface resistance value of the transparent conductive layer is 10 to 2000 ⁇ / ⁇ at a film thickness of 10 to 40 nm due to reduction of power consumption of the touch panel and circuit processing. It is preferable to use a transparent conductive layer exhibiting a range of 30 to 1000 ⁇ / ⁇ .
- a wet dispersion method for example, spin coating method, gravure, slot die, printing, etc.
- a dispersion liquid in which metal nanowires, carbon nanotubes, conductive oxide fine particles and the like are dispersed.
- a layer formed by the above can also be used.
- the transparent conductive layer thus formed is subjected to pattern formation by etching.
- This etching process is generally performed by covering the transparent conductive layer with a pattern formation mask and then etching the transparent conductive layer using an etching solution such as an acidic aqueous solution.
- the etchant include inorganic acids such as hydrogen chloride, hydrogen bromide, sulfuric acid, nitric acid, and phosphoric acid, organic acids such as acetic acid, and mixtures thereof, and aqueous solutions thereof.
- ITO in which the transparent conductive layer is crystallized by heat treatment, there is an advantage that transparency and conductivity can be improved by performing the heat treatment.
- the heat treatment can be performed, for example, by heating at 100 to 150 ° C. for 15 to 180 minutes.
- the reflectance (R1) when the transparent conductive laminate is irradiated with a light source having a wavelength in the range of 500 to 750 nm, and the transparent conductive laminate is converted into 12N hydrochloric acid, 16N After being dipped in a strong acid aqueous solution obtained by mixing nitric acid and water at a mass ratio of 12N hydrochloric acid: 16N nitric acid: water 3.3: 1.0: 7.6 at 40 ° C. for 3 minutes and then dried.
- the difference ⁇ R between R1 and R2 is 1 or less in the reflectance (R2) when the transparent conductive laminate is irradiated with a light source having a wavelength in the range of 500 to 750 nm.
- the strong acid aqueous solution is a so-called aqua regia strong acid aqueous solution that is generally used in an etching process. By performing the etching process using the strong acid aqueous solution, the transparent conductive layer is etched.
- FIG. 1 is a schematic explanatory diagram showing an etched transparent conductive laminate. In the transparent conductive laminate (10), a hard coat layer (3), a color difference adjusting layer (5), and a transparent conductive layer (7) were sequentially laminated on one surface of the transparent polymer substrate (1).
- the portion indicated by (11) is a portion where the transparent conductive layer (7) has been removed by patterning by the etching treatment, and the portion indicated by (13) is a portion masked by the etching treatment.
- the transparent conductive layer is left as it is.
- the reflectance R1 means the reflectance at the portion (13) in FIG. 1
- the reflectance R2 means the reflectance at the portion (11) in FIG.
- the transparent conductive laminate of the present invention is characterized in that the difference ⁇ R between R1 and R2 is 1 or less in the reflectance when irradiated with a light source having a wavelength in the range of 500 to 750 nm. That is, in the transparent conductive laminate of the present invention, there is almost no difference in reflectance between the portion where the transparent conductive layer (7) is present and the portion where it is not present. Thereby, extremely high visibility was achieved.
- the reflectance of the transparent conductive laminate can be measured using a spectrophotometer such as Hitachi U-3000, for example, and the spectral reflectance at an incident angle of 10 degrees can be measured according to JIS K5600-4-5. it can.
- the haze value (H1) of the transparent conductive laminate, the transparent conductive laminate, 12N hydrochloric acid, 16N nitric acid and water, 12N hydrochloric acid: 16N nitric acid: water 3.
- the difference in haze value (H2) of the transparent conductive laminate after being dipped in a strong acid aqueous solution obtained by mixing at a mass ratio of 3: 1.0: 7.6 at 40 ° C. for 3 minutes and then dried. ⁇ H is preferably 0.3% or less.
- the haze value H1 means a haze value at a portion (13) in FIG. 1
- the haze value H2 means a haze value at a portion (11) in FIG.
- the difference (DELTA) H of haze value H1 and H2 is 0.3% or less.
- the transparent conductive laminate of the present invention there is almost no difference in haze value between the portion where the transparent conductive layer (7) is present and the portion where it is not present. Thereby, extremely high visibility was achieved.
- the haze value of the transparent conductive laminate is calculated from the following formula in accordance with JIS K7105.
- H Haze (cloudiness value) (%)
- T d Diffuse transmittance (%)
- T t Total light transmittance (%)
- the total light transmittance (T t (%)) is calculated by the following equation by measuring the incident light intensity (T 0 ) with respect to the laminate and the total transmitted light intensity (T 1 ) transmitted through the laminate. .
- the haze value can be measured using, for example, a haze meter (manufactured by Suga Test Instruments Co., Ltd.).
- the transparent conductive laminate of the present invention has a structure in which a hard coat layer, a color difference adjusting layer, and a transparent conductive layer are sequentially laminated on one surface of a transparent polymer substrate.
- an anti-blocking layer may be formed on the other surface of the transparent polymer base material as necessary.
- compositions forming the anti-blocking layer include an anti-blocking layer forming composition containing a first component and a second component.
- the difference ⁇ SP between the SP value (SP1) of the first component and the SP value (SP2) of the second component is in the range of 1 to 2, and after coating the anti-blocking layer forming composition, the first component and the second component More preferably, the composition is an anti-blocking layer-forming composition in which the component causes phase separation and an anti-blocking layer having fine irregularities on the surface is formed.
- An unsaturated double bond-containing acrylic copolymer is used as the first component.
- An unsaturated double bond-containing acrylic copolymer is, for example, a resin obtained by copolymerizing a (meth) acrylic monomer and another monomer having an ethylenically unsaturated double bond, a (meth) acrylic monomer and another ethylenically unsaturated Acrylic acid or glycidyl acrylate for resins reacted with monomers having double bonds and epoxy groups, resins made by reacting (meth) acrylic monomers with other monomers having ethylenically unsaturated double bonds and isocyanate groups, etc. And those having an unsaturated double bond and other functional groups added thereto.
- the unsaturated double bond-containing acrylic copolymers may be used alone, or two or more thereof may be mixed and used.
- the unsaturated double bond-containing acrylic copolymer preferably has a weight average molecular weight of 2,000 to 100,000, more preferably 5,000 to 50,000.
- the monomer or oligomer of the second component is a polyfunctional unsaturated double bond-containing monomer or oligomer thereof.
- oligomer refers to a polymer having a repeating unit, wherein the number of repeating units is 3 to 10.
- a polyfunctional unsaturated double bond-containing monomer for example, a polyfunctional acrylate which is a dealcoholization reaction product of a polyhydric alcohol and (meth) acrylate, specifically, dipentaerythritol hexa (meth) acrylate, dipenta Erythritol penta (meth) acrylate, trimethylolpropane tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, neopentyl glycol di (meth) acrylate, and the like can be used.
- a polyfunctional acrylate which is a dealcoholization reaction product of a polyhydric alcohol and (meth) acrylate, specifically, dipentaerythritol hexa (meth) acrylate, dipenta Erythritol penta (meth) acrylate, trimethylolpropane tri (meth) acrylate, ditrimethylol
- an acrylate monomer having a polyethylene glycol skeleton such as polyethylene glycol # 200 diacrylate (manufactured by Kyoeisha Chemical Co., Ltd.) can also be used.
- polyethylene glycol # 200 diacrylate manufactured by Kyoeisha Chemical Co., Ltd.
- One of these polyfunctional unsaturated double bond-containing monomers may be used alone, or two or more thereof may be mixed and used.
- the second component is more preferably a polyfunctional acrylate.
- Preferred organic solvents when the first component and the second component are the above combinations include, for example, ketone solvents such as methyl ethyl ketone, acetone, methyl isobutyl ketone, and cyclohexanone; alcohol solvents such as methanol, ethanol, propanol, isopropanol, and butanol
- An ether solvent such as anisole, phenetol propylene glycol monomethyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, and diethylene glycol diethyl ether; One of these solvents may be used alone, or two or more organic solvents may be mixed and used.
- the anti-blocking layer forming composition preferably contains a photopolymerization initiator.
- the photopolymerization initiator include 2-hydroxy-2methyl-1phenyl-propan-1-one, 1-hydroxy-cyclohexyl-phenyl-ketone, 2-methyl-1- [4- (methylthio) phenyl] -2 -Morpholinopropan-1-one, 2,2-dimethoxy-1,2-diphenylethane-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1, etc. Can be mentioned.
- phase separation is caused by the difference in SP value between the first component and the second component.
- the difference between the SP value of the first component and the SP value of the second component is preferably 1 or more, and more preferably in the range of 1 to 2.
- the compatibility of the resins with each other is low, whereby the first component and the second component are applied after application of the anti-blocking layer forming composition. It is thought that phase separation is brought about.
- the SP value is an abbreviation for solubility parameter (solubility parameter) and is a measure of solubility.
- solubility parameter is a measure of solubility.
- the SP value indicates that the polarity is higher as the numerical value is larger, and the polarity is lower as the numerical value is smaller.
- the SP value can be measured by the following method [References: SUH, CLARKE, J. et al. P. S. A-1, 5, 1671-1681 (1967)].
- Measurement temperature 20 ° C
- Sample Weigh 0.5 g of resin in a 100 ml beaker, add 10 ml of good solvent using a whole pipette, and dissolve with a magnetic stirrer.
- solvent Good solvent: Dioxane, acetone, etc. Poor solvent: n-hexane, ion-exchanged water, etc.
- Muddy point measurement The poor solvent is added dropwise using a 50 ml burette, and the point at which turbidity occurs is defined as the amount of addition.
- the SP value ⁇ of the resin is given by the following equation.
- the anti-blocking layer forming composition may contain conventional additives such as an antistatic agent, a plasticizer, a surfactant, an antioxidant, and an ultraviolet absorber, if necessary.
- the anti-blocking layer-forming composition may contain a commonly used resin.
- the anti-blocking layer forming composition is characterized in that, by using the first component and the second component as described above, a resin layer having irregularities can be formed without including resin particles or the like. . Therefore, it is preferable that the anti-blocking layer forming composition does not contain resin particles.
- the anti-blocking layer forming composition may contain at least one or more inorganic particles, organic particles, or a composite thereof, if necessary. These particles are not particularly added for the purpose of forming irregularities on the surface, but are added to form more uniform and fine irregularities by controlling phase separation and precipitation. These particles have an average particle size of 0.5 ⁇ m or less, preferably 0.01 to 0.3 ⁇ m. When it exceeds 0.5 ⁇ m, the transparency slightly decreases.
- inorganic particles include silica, alumina, titania, zeolite, mica, synthetic mica, calcium oxide, zirconium oxide, zinc oxide, magnesium fluoride, smectite, synthetic smectite, vermiculite, ITO (indium oxide / tin oxide), ATO There may be mentioned at least one selected from the group consisting of (antimony oxide / tin oxide), tin oxide, indium oxide and antimony oxide.
- organic particles include at least one selected from the group consisting of acrylic, olefin, polyether, polyester, urethane, polyester, silicone, polysilane, polyimide, and fluorine particles.
- the anti-blocking layer forming composition is prepared by mixing the first component and the second component, and additives such as a solvent, a photopolymerization initiator, a catalyst, and a photosensitizer as necessary.
- the ratio of the first component to the second component in the anti-blocking layer forming composition is preferably 0.1: 99.9 to 50:50, more preferably 0.3: 99.7 to 20:80, and 0 5: 99.5 to 10:90 is more preferable.
- the first component, the second component, and other resin as necessary are 100 parts by mass. 0.01 to 20 parts by mass, preferably 1 to 10 parts by mass can be added.
- a solvent is used, 1 to 9900 parts by mass, preferably 10 to 900 parts by mass can be added to 100 parts by mass of the resin component.
- the anti-blocking layer having fine irregularities on the surface can be formed by applying the anti-blocking layer forming composition and then curing the composition.
- the coating method of the anti-blocking layer forming composition include dip coating, air knife coating, curtain coating, roller coating, wire bar coating, gravure coating, and extrusion coating.
- the thickness of the anti-blocking layer include an embodiment having a thickness of 0.01 to 20 ⁇ m.
- the anti-blocking layer-forming composition After coating the anti-blocking layer-forming composition, it can be phase-separated and cured by irradiation with light.
- the light to be irradiated for example, light having an exposure amount of 0.1 to 3.5 J / cm 2 , preferably 0.5 to 1.5 J / cm 2 can be used.
- the wavelength of the irradiation light is not particularly limited, and for example, irradiation light having a wavelength of 360 nm or less can be used. Such light can be obtained using a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like. By irradiating light in this way, phase separation and curing will occur.
- the touch panel of the present invention has the transparent conductive laminate.
- Examples of the touch panel of the present invention include a capacitive touch panel.
- the layer structure in the case where the transparent conductive laminate of the present invention is used as a touch panel substrate include the following structures: Transparent conductive layer / color difference adjusting layer / hard coat layer / transparent polymer substrate, Transparent conductive layer / metal oxide layer / color difference adjusting layer / hard coat layer / transparent polymer substrate, Transparent conductive layer / color difference adjusting layer / hard coat layer / transparent polymer substrate / anti-blocking layer, Transparent conductive layer / metal oxide layer / color difference adjusting layer / hard coat layer / transparent polymer substrate / anti-blocking layer, Transparent conductive layer / color difference adjusting layer / hard coat layer / transparent polymer substrate / hard coat layer / color difference adjusting layer / transparent conductive layer, Transparent conductive layer / metal oxide layer / color difference adjusting layer / hard coat layer / transparent polymer substrate / hard coat layer / color difference adjusting layer / transparent conductive layer, Transparent conductive layer / metal oxide layer / color difference adjusting
- the auxiliary electrode layer mentioned here means a layer that can be used as an electrode material for wiring.
- a material for the auxiliary electrode layer a material having a specific resistance of 1 ⁇ 10 ⁇ 6 ⁇ cm or more and 1 ⁇ 10 ⁇ 4 ⁇ cm or less is desirable.
- a metal material having a specific resistance of less than 1 ⁇ 10 ⁇ 6 ⁇ cm is used, it is unstable in terms of application function, and it becomes difficult to form a thin film.
- a metal material having a specific resistance greater than 1 ⁇ 10 ⁇ 4 ⁇ cm is used, the resistance value is too high, and thus the resistance value becomes high when thin wire processing is performed.
- a metal suitable for practical use is recommended to be a single metal selected from the group consisting of Cu, Ag, Al, Au, Ni, Ni / Cr, and Ti, or an alloy composed of a plurality of types.
- it is a metal with high electrical conductivity and excellent workability such as pattern etching and electroplating, and has good electrical and mechanical connectivity (solder, anisotropic conductive connector, etc.) between the electrode and the lead portion of the circuit, Cu, Al, and the like are preferable in terms of bending resistance, high thermal conductivity, and low cost, and Cu is particularly preferable.
- the thickness of the auxiliary electrode layer is not particularly limited, but a normal design specification of 0.001 to 100 ⁇ m, preferably 0.01 to 25 ⁇ m is recommended.
- a known treatment method can be used for forming the auxiliary electrode, but it is preferable to form the auxiliary electrode by a sputtering method. Further, if necessary, the electroconductivity may be increased by further increasing the film thickness by electrolysis / electroless wet metal plating.
- a refractory metal layer made of Ni, Ni / Cr, Cr, Ti, Mo or the like on the upper and lower layers of the auxiliary electrode layer and these An oxide layer may be provided.
- the transparent conductive laminate using a high refractive index anti-blocking layer also has a high refractive index anti-blocking layer, a color difference adjusting layer and a transparent conductive layer laminated in this order on at least one surface of a transparent polymer substrate. Also provided is a transparent conductive laminate. Each layer which comprises the transparent conductive laminated body of this invention is demonstrated.
- Transparent polymer substrate The transparent polymer substrate used in the transparent conductive laminate of the present invention is the same as the transparent polymer substrate described above.
- the high refractive index antiblocking layer of the transparent conductive laminate of the present invention is a layer obtained by a specific high refractive index antiblocking layer forming composition.
- the high refractive index anti-blocking layer forming composition includes a first component and a second component.
- the first component is an unsaturated double bond-containing acrylic copolymer.
- the second component includes (A) a phenol novolak acrylate having 2 or more acrylate groups, and (B) an aromatic group having 1 to 2 mol of an alkylene oxide structure having 2 or 3 carbon atoms in the molecule.
- Mono or poly (meth) acrylates Mono or poly (meth) acrylates.
- the phenol novolac acrylate (A) is contained in an amount of 60 to 85 parts by mass and the (meth) acrylate (B) in an amount of 15 to 30 parts by mass with respect to 100 parts by mass of the second component. Further, the difference ⁇ SP between the SP value (SP1) of the first component and the SP value (SP2) of the second component is in the range of 1 to 4, and the first component and the second component contained in the composition
- This high refractive index anti-blocking layer forming composition is characterized in that after coating, the first component and the second component cause layer separation, and an anti-blocking layer having fine irregularities on the surface is formed.
- an unsaturated double bond-containing acrylic copolymer is used as the first component.
- An unsaturated double bond-containing acrylic copolymer is, for example, a resin obtained by copolymerizing a (meth) acrylic monomer and another monomer having an ethylenically unsaturated double bond, a (meth) acrylic monomer and another ethylenically unsaturated Acrylic acid or glycidyl acrylate for resins reacted with monomers having double bonds and epoxy groups, resins made by reacting (meth) acrylic monomers with other monomers having ethylenically unsaturated double bonds and isocyanate groups, etc. And those having an unsaturated double bond and other functional groups added thereto.
- the unsaturated double bond-containing acrylic copolymers may be used alone, or two or more thereof may be mixed and used.
- the unsaturated double bond-containing acrylic copolymer preferably has a weight average molecular weight of 2,000 to 100,000, more preferably 5,000 to 50,000.
- the second component is: (A) A phenol novolak acrylate having 2 or more acrylate groups, and (B) an aromatic group-containing mono- or poly (meth) having 1 to 2 mol of an alkylene oxide structure having 2 or 3 carbon atoms in the molecule Acrylate, including.
- a phenol novolak acrylate having 2 or more acrylate groups and (B) an aromatic group-containing mono- or poly (meth) having 1 to 2 mol of an alkylene oxide structure having 2 or 3 carbon atoms in the molecule Acrylate, including.
- (A) Phenol novolac acrylate having two or more acrylate groups
- the component (A) of the second component is the same as the phenol novolac acrylate (A) described in the hard coat layer.
- the phenol novolac acrylate (A) is provided on the condition that it is contained in an amount of 60 to 85 parts by mass with respect to 100 parts by mass of the second component.
- the amount of the phenol novolac acrylate (A) is less than 60 parts by mass and when the amount of the phenol novolac acrylate (A) exceeds 85 parts by mass, the hardness of the obtained anti-blocking layer is low. There is a bug.
- (B) Aromatic group-containing mono- or poly (meth) acrylate having 1 to 2 mol of alkylene oxide structure of 2 or 3 carbon atoms in the molecule.
- This component (B) is an aromatic group-containing mono group described in the hard coat layer. Or it is the same as poly (meth) acrylate.
- the component (B) is included in an amount of 15 to 30 parts by mass with respect to 100 parts by mass of the second component contained in the high refractive index antiblocking layer forming composition.
- the obtained anti-blocking layer has an advantage of high hardness and high refractive index.
- the amount of the component (B) is less than 15 parts by mass and when the amount of the component (B) exceeds 30 parts by mass, there is a problem that the hardness of the obtained anti-blocking layer is lowered.
- the second component in the high refractive index anti-blocking layer forming composition of the present invention may contain other (meth) acrylates in addition to the components (A) and (B). Such (meth) acrylates are the same as those described for the hard coat layer.
- the second component contained in the high-refractive index anti-blocking layer forming composition contains other (meth) acrylates
- 100 parts by mass of the second component contained in the high-refractive index anti-blocking layer forming composition The range is preferably 1 to 30 parts by mass, and more preferably 1 to 25 parts by mass.
- High refractive index antiblocking layer forming composition is composed of a first component and a second component, and addition of a solvent, a photopolymerization initiator, a catalyst, a photosensitizer and the like as required. It is prepared by mixing the agent.
- phase separation is caused by the difference in SP value between the first component and the second component.
- the difference ( ⁇ SP) between the SP value of the first component and the SP value of the second component is within the range of 1 to 4.
- the compatibility of the resins with each other is low, whereby the first component and the second component are applied after application of the anti-blocking layer forming composition. It is thought that phase separation is brought about.
- the ⁇ SP is more preferably in the range of 2.0 to 3.5.
- the SP value is an abbreviation for solubility parameter (solubility parameter) and is a measure of solubility.
- solubility parameter is a measure of solubility.
- the SP value indicates that the polarity is higher as the numerical value is larger, and the polarity is lower as the numerical value is smaller.
- the SP value can be measured by the following method [References: SUH, CLARKE, J. et al. P. S. A-1, 5, 1671-1681 (1967)].
- Measurement temperature 20 ° C
- Sample Weigh 0.5 g of resin in a 100 ml beaker, add 10 ml of good solvent using a whole pipette, and dissolve with a magnetic stirrer.
- solvent Good solvent: Dioxane, acetone, etc. Poor solvent: n-hexane, ion-exchanged water, etc.
- Muddy point measurement The poor solvent is added dropwise using a 50 ml burette, and the point at which turbidity occurs is defined as the amount of addition.
- the SP value ⁇ of the resin is given by the following equation.
- the high refractive index antiblocking layer-forming composition of the present invention may further contain components such as various solvents, photopolymerization initiators and additives in addition to the first component and the second component.
- Preferred organic solvents when the first component and the second component are the above combinations include, for example, ketone solvents such as methyl ethyl ketone, acetone, methyl isobutyl ketone, and cyclohexanone; alcohol solvents such as methanol, ethanol, propanol, isopropanol, and butanol
- An ether solvent such as anisole, phenetol propylene glycol monomethyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, and diethylene glycol diethyl ether;
- One of these solvents may be used alone, or two or more organic solvents may be mixed and used.
- a solvent for example, 1 to 9900 parts by mass, preferably 10 to 900 parts by mass are added to 100 parts by mass of the total amount of the first component and the second component (collectively referred to as “resin component”). Can do.
- the high refractive index anti-blocking layer forming composition preferably contains a photopolymerization initiator.
- the photopolymerization initiator include 2-hydroxy-2methyl-1phenyl-propan-1-one, 1-hydroxy-cyclohexyl-phenyl-ketone, 2-methyl-1- [4- (methylthio) phenyl] -2 -Morpholinopropan-1-one, 2,2-dimethoxy-1,2-diphenylethane-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1, etc. Can be mentioned.
- a preferable amount of the photopolymerization initiator is 0.01 to 20 parts by mass, and more preferably 1 to 10 parts by mass with respect to 100 parts by mass of the resin component.
- the high refractive index anti-blocking layer forming composition may contain conventional additives such as an antistatic agent, a plasticizer, a surfactant, an antioxidant, and an ultraviolet absorber, if necessary.
- additives such as an antistatic agent, a plasticizer, a surfactant, an antioxidant, and an ultraviolet absorber, if necessary.
- the amount is preferably 0.01 to 20 parts by weight and more preferably 1 to 10 parts by weight with respect to 100 parts by weight of the resin component.
- the high refractive index anti-blocking layer forming composition can form a resin layer having irregularities without using resin particles or the like by using the first component and the second component as described above. There is. Therefore, it is preferable that the anti-blocking layer forming composition does not contain resin particles.
- the anti-blocking layer forming composition may contain at least one or more inorganic particles, organic particles, or a composite thereof, if necessary. These particles are not particularly added for the purpose of forming irregularities on the surface, but are added to form more uniform and fine irregularities by controlling phase separation and precipitation. These particles have an average particle size of 0.5 ⁇ m or less, preferably 0.01 to 0.3 ⁇ m. When it exceeds 0.5 ⁇ m, the transparency slightly decreases.
- the inorganic particles include at least one selected from the group consisting of silica, alumina, zeolite, mica, synthetic mica, calcium oxide, magnesium fluoride, smectite, synthetic smectite, vermiculite, indium oxide, and antimony oxide. .
- organic particles include at least one selected from the group consisting of acrylic, olefin, polyether, polyester, urethane, polyester, silicone, polysilane, polyimide, and fluorine particles.
- the anti-blocking layer having fine irregularities on the surface can be formed by coating the high refractive index anti-blocking layer forming composition and then curing the composition.
- the coating method of the anti-blocking layer forming composition include dip coating, air knife coating, curtain coating, roller coating, wire bar coating, gravure coating, and extrusion coating.
- the thickness of the anti-blocking layer include an embodiment having a thickness of 0.01 to 20 ⁇ m.
- the high refractive index antiblocking layer-forming composition After coating the high refractive index antiblocking layer-forming composition, it can be phase separated and cured by irradiating light.
- the light to be irradiated for example, light having an exposure amount of 0.1 to 3.5 J / cm 2 , preferably 0.5 to 1.5 J / cm 2 can be used.
- the wavelength of the irradiation light is not particularly limited, and for example, irradiation light having a wavelength of 360 nm or less can be used. Such light can be obtained using a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like. By irradiating light in this way, phase separation and curing will occur.
- the anti-blocking layer formed by the above-described high refractive index anti-blocking layer forming composition has fine irregularities.
- the arithmetic average roughness (Ra) of the surface roughness curve of the anti-blocking layer is preferably less than 0.1 ⁇ m, more preferably 0.001 to 0.09 ⁇ m, and 0.002 to 0.00. Particularly preferred is 08 ⁇ m.
- the arithmetic average roughness (Ra) of the roughness curve is a parameter defined in JIS B 0601-2001.
- the arithmetic average roughness (Ra) of the surface roughness curve of the anti-blocking layer is 0.1 ⁇ m or more, problems such as generation of glare and whitening of the coating film may occur. If the value of Ra is less than the particularly preferable range, a blocking phenomenon occurs, which is not preferable.
- JIS B 0601-2001 is a Japanese industrial standard and is a standard based on ISO 4288.
- Arithmetic average roughness (Ra) of the roughness curve is a sample of only the reference length in the direction of the average line from the roughness curve, the X axis in the direction of the average line of this extracted portion, and Y in the direction of the vertical magnification.
- y f (x)
- ⁇ m micrometers
- the anti-blocking layer formed from the high refractive index anti-blocking layer forming composition preferably has an Rz of 0.5 ⁇ m or less.
- Rz is the ten-point average roughness of the roughness curve, and is a parameter defined in JIS B0601-2001.
- Rz is more preferably 0.3 ⁇ m or less, and further preferably 0.2 ⁇ m or less.
- the lower limit is preferably 0.01 ⁇ m.
- the arithmetic average roughness (Ra) and ten-point average roughness (Rz) of the surface roughness curve of the anti-blocking layer formed by the high refractive index anti-blocking layer forming composition are, for example, high values manufactured by Kosaka Laboratory. Measurement can be performed in accordance with JIS B 0601-2001 using a precision fine shape measuring instrument or a color 3D laser microscope manufactured by Keyence Corporation.
- the anti-blocking layer formed from the high refractive index anti-blocking layer forming composition has an irregular, fine and dense concavo-convex shape and exhibits excellent anti-blocking properties.
- the anti-blocking layer in the present invention is also advantageous in that the sharpness of an image displayed by a light source such as a liquid crystal module is not deteriorated.
- the pitch of light rays emitted from the liquid crystal has become finer. Therefore, in order to maintain image clarity, a finer and denser uneven shape is required.
- the anti-blocking layer in the present invention has an advantage that it has a fine and dense concavo-convex shape and is not accompanied by a decrease in image sharpness such as a decrease in contrast and a decrease in luminance.
- the anti-blocking layer in the present invention is characterized in that the refractive index of the anti-blocking layer is as high as 1.565 to 1.620 without using a high refractive index agent.
- the refractive index of the anti-blocking layer can be measured using an Abbe refractometer according to JIS K7142.
- the anti-blocking layer forming composition may contain various additives as necessary.
- additives include conventional additives such as antistatic agents, plasticizers, surfactants, and antioxidants.
- the anti-blocking layer forming composition may not contain a high refractive index agent composed of a metal oxide such as ZnO, TiO 2 , CeO 2 , SnO 2 , ZrO 2 or indium-tin oxide, etc.
- a high refractive index anti-blocking layer having a high refractive index can be formed. Therefore, the high refractive index anti-blocking layer does not contain a high refractive index agent such as a metal oxide selected from the group consisting of ZnO, TiO 2 , CeO 2 , SnO 2 , ZrO 2 and indium-tin oxide. Is preferred.
- the total content of ZnO, TiO 2 , CeO 2 , SnO 2 , ZrO 2 and indium-tin oxide contained in the high refractive index anti-blocking layer is 0.0001% by mass or less in the anti-blocking layer. Is preferred. This is because when a high refractive index agent such as a metal oxide is present in the high refractive index anti-blocking layer, the stretchability and the bending resistance are generally inferior as compared with the resin-only layer.
- the high-refractive index anti-blocking layer formed using the anti-blocking layer forming composition has a good hardness as a high-refractive index anti-blocking layer and a high refractive index of 1.565 to 1.620. It is characterized by. Since the high refractive index antiblocking layer has such a high refractive index, there is an advantage that the generation of interference fringes can be satisfactorily suppressed in the transparent conductive laminate.
- the high-refractive index anti-blocking layer provided using the anti-blocking layer-forming composition also has high extensibility in addition to the performance required for the high-refractive index anti-blocking layer such as high visibility and good hardness. And And this high extensibility has the advantage that the visibility of the transparent conductive laminate is dramatically improved.
- a partial load tends to be generated on a base film having a high refractive index antiblocking layer during processing for providing a transparent conductive layer.
- a partial load is applied to the film based on the difference in thermal shrinkage / expansion coefficient between the high refractive index anti-blocking layer and the base film.
- Swelling and twisting may occur.
- the waviness / twisting of these films brings about a decrease in visibility in which a portion where a transparent conductive layer such as ITO is present and a portion where it is not present are visually distinguished. This greatly reduces visibility in a touch panel or the like.
- the high refractive index antiblocking layer provided by using the antiblocking layer forming composition used in the present invention has high extensibility in addition to the performance required in the high refractive index antiblocking layer such as high visibility and good hardness. It is characterized by having. Since the high refractive index anti-blocking layer in the present invention has high extensibility, even when the base film is locally thermally expanded by heating in the stage of providing the transparent conductive layer, the high refractive index anti-blocking layer The layer follows well, and as a result, there is an advantage that the problem of reduced visibility in which a portion where a transparent conductive layer such as ITO is present is visually distinguished from a portion where the transparent conductive layer is not present is eliminated.
- the transparent conductive laminate of the present invention has a color difference adjusting layer on the high refractive index anti-blocking layer. That is, the color difference adjusting layer is a layer existing between the high refractive index anti-blocking layer and the transparent conductive layer. This color difference adjusting layer may be a single layer or a layer composed of two or more layers. The color difference adjusting layer is a layer for improving adhesion between layers and optical characteristics (such as transmittance and color tone) of the transparent conductive laminate.
- this color difference adjusting layer is Cured resin component (i) and metal oxide particles (ii) having an average primary particle size of 100 nm or less and / or metal fluoride particles (iii) having an average primary particle size of 100 nm or less It is a layer containing.
- the total mass of the particles (ii) and (iii) in the color difference adjusting layer is conditional on being in the range of 0 to 200 parts by mass with respect to 100 parts by mass of the cured resin component (i).
- an ultraviolet curable resin or a thermosetting resin can be used as the curable resin component (i).
- an ultraviolet curable resin can be obtained by a composition containing a monomer having ultraviolet curing performance.
- the monomer having ultraviolet curing performance include monofunctional and polyfunctional acrylates such as polyol acrylate, polyester acrylate, urethane acrylate, epoxy acrylate, modified styrene acrylate, melamine acrylate, and silicon-containing acrylate.
- Specific monomers include, for example, trimethylolpropane trimethacrylate, trimethylolpropane ethylene oxide modified acrylate, trimethylolpropane propylene oxide modified acrylate, isocyanuric acid alkylene oxide modified acrylate, pentaerythritol triacrylate, dipentaerythritol hexaacrylate, Multifunctional monomers such as methylol tricyclodecane diacrylate, tripropylene glycol triacrylate, diethylene glycol diacrylate, 1,6-hexanediol diacrylate, epoxy-modified acrylate, urethane-modified acrylate such as urethane (meth) acrylate, and epoxy-modified acrylate Can be mentioned.
- urethane-modified acrylate is preferable.
- a commercially available product can be used as the urethane-modified acrylate.
- a purple light series manufactured by Nippon Synthetic Chemical Industry Co., Ltd. for example, UV1700B, UV6300B, UV765B, UV7640B, UV7600B, etc .; Art Resin series manufactured by Negami Industrial Co., Ltd.
- Ebecryl series made by Daicel UCB Co., Ltd., For example, 1290, 5129, 254, 264, 265, 1259, 1264, 4866, 9260, 8210, 204, 205, 6602, 220, 4450, etc .; Beam set series manufactured by Arakawa Chemical Industries, Ltd., for example, 371, 371MLV 371S, 577, 577BV, 577AK, etc .; RQ series manufactured by Mitsubishi Rayon Co., Ltd .; Unidic series manufactured by DIC Corporation, etc .; DPHA40H (manufactured by Nippon Kayaku Co., Ltd.), CN9006, CN968 (made by SARTOMER) ) Etc. can be used.
- the composition forming the color difference adjusting layer preferably contains a photopolymerization initiator.
- a photopolymerization initiator commonly used photopolymerization initiators such as acetophenone, benzophenone, benzoin, benzoylbenzoate, and thioxanthone can be used.
- the composition forming the color difference adjusting layer may further contain a photosensitizer.
- the photosensitizer for example, commonly used photosensitizers such as triethylamine and tri-n-butylphosphine can be used.
- the composition forming the color difference adjusting layer may further contain hydrolysates of various alkoxysilanes.
- the composition for forming the color difference adjusting layer is an organosilane thermosetting monomer having a silane compound such as methyltriethoxysilane or phenyltriethoxysilane as a monomer.
- a thermosetting monomer such as a melamine thermosetting monomer, an isocyanate thermosetting monomer, a phenol thermosetting monomer, or an epoxy thermosetting monomer using a monomer or etherified methylol melamine as a monomer may be included.
- thermosetting monomers may be used alone or in combination of two or more. In addition to the said thermosetting monomer, you may contain the thermoplastic resin component as needed.
- the composition forming the color difference adjusting layer preferably contains a reaction accelerator or a curing agent.
- the reaction accelerator include triethylenediamine, dibutyltin dilaurate, benzylmethylamine, pyridine and the like.
- the curing agent include methylhexahydrophthalic anhydride, 4,4'-diaminodiphenylmethane, 4,4'-diamino-3,3'-diethyldiphenylmethane, diaminodiphenylsulfone and the like.
- the color difference adjusting layer in addition to the cured resin component (i), includes metal oxide particles (ii) having an average primary particle diameter of 100 nm or less and / or metal fluoride particles having an average primary particle diameter of 100 nm or less. (Iii) is included. The total mass of these particles (ii) and (iii) is within the range of 0 to 200 parts by mass with respect to 100 parts by mass of the cured resin component (i).
- the total mass of the particles (ii) and (iii) can be appropriately adjusted according to the refractive index of each of (i), (ii) and (iii) in order to obtain desired optical properties, but from the viewpoint of film strength after curing
- the total mass of the particles (ii) and (iii) in the color difference adjusting layer exceeds 200 parts by mass, there is a problem that interlayer adhesion is poor.
- the metal oxide particles (ii) include ZnO, TiO 2 , CeO 2 , SnO 2 , ZrO 2 and indium-tin oxide. All of these metal oxide particles (ii) are characterized by having a high refractive index. Therefore, the color difference adjusting layer containing the metal oxide particles (ii) is basically a high refractive index layer. As the metal oxide particles (ii), ZnO, TiO 2 and ZrO 2 are more preferably used. As the metal oxide particles (ii), one type may be used alone, or two or more types may be used in combination.
- all of these metal oxide particles (ii) are on condition that an average primary particle diameter is 100 nm or less.
- the average primary particle diameter exceeds 100 nm, the size is easily visible due to aggregation of particles during the formation of the color difference adjusting layer, so that there are problems such as an increase in haze value or a foreign appearance defect.
- the average primary particle size represents a 50% volume particle size when a liquid in which particles are dispersed in a solvent such as n-BuOH is measured with a particle size distribution meter.
- metal constituting the metal fluoride particles (iii) include calcium, barium, magnesium, strontium and the like. Among these metals, magnesium is more preferable. These metal fluoride particles (iii) may be used alone or in combination of two or more. If necessary, the metal fluoride particles (iii) and SiO 2 may be used in combination.
- the color difference adjusting layer containing the metal fluoride particles (iii) is basically a low refractive index layer.
- all of these metal fluoride particles (iii) are on condition that an average primary particle diameter is 100 nm or less. When the average primary particle diameter exceeds 100 nm, the size is easily visible due to aggregation of particles during the formation of the color difference adjusting layer, so that there are problems such as an increase in haze value or a foreign appearance defect.
- the color difference adjusting layer in the present invention may be composed of one layer or may be composed of two or more layers.
- the color difference adjusting layer is a single layer, it is preferably a high refractive index layer containing the metal oxide particles (ii).
- the aspect containing both the said metal oxide particle (ii) and metal fluoride particle (iii) is mentioned, for example.
- the thickness of the color difference adjusting layer is preferably 30 to 300 nm, more preferably 50 nm to 200 nm.
- the color difference adjusting layer when it is two layers, it has a two-layer structure including a high refractive index layer containing the metal oxide particles (ii) and a low refractive index layer containing the metal fluoride particles (iii). Is preferred. In this case, it is more preferable that the high refractive index anti-blocking layer and the high refractive index layer are in contact with each other.
- the total thickness of the color difference adjusting layer is preferably 30 to 300 nm, preferably 50 nm to 200 nm. More preferably.
- Formation of the color difference adjusting layer is, for example, a composition comprising a monomer having ultraviolet curing performance and the metal oxide particles (ii) and / or metal fluoride particles (iii), having a high refractive index antiblocking layer. It can be formed by coating on a high-refractive index antiblocking layer of a polymer substrate, and then irradiating and curing an active energy ray such as ultraviolet rays. Alternatively, the composition containing the thermosetting monomer and the metal oxide particles (ii) and / or the metal fluoride particles (iii) is made into a high refractive index anti-reflective layer of a transparent polymer substrate having a high refractive index antiblocking layer.
- It can be formed by coating on a blocking layer and then heat curing.
- a composition containing metal oxide particles (ii) is coated on a high refractive index antiblocking layer and cured, and then metal fluoride particles (iii)
- a color difference adjusting layer composed of two layers can be formed by coating and curing a composition containing.
- a composition containing metal fluoride particles (iii) is coated and cured, and then a composition containing metal oxide particles (ii) is made high.
- a coating method using a coating machine usually used by those skilled in the art such as a doctor knife, bar coater, gravure roll coater, curtain coater, knife coater, spin coater, a coating method using a spray, Examples of the coating method include immersion.
- the composition may contain an organic solvent as required.
- organic solvents include alcohol solvents such as ethanol, isopropyl alcohol, butanol and 1-methoxy-2-propanol, hydrocarbon solvents such as hexane, cyclohexane, ligroin and cyclohexanone, and ketone solvents such as methyl isobutyl ketone and isobutyl acetate.
- aromatic solvents such as solvents, xylene and toluene.
- this curing can be performed by irradiating with a light source that emits an active energy ray having a wavelength as required.
- a light source that emits an active energy ray having a wavelength as required.
- the active energy ray to be irradiated for example, light having an exposure dose of 0.1 to 1.5 J / cm 2 , preferably 0.3 to 1.5 J / cm 2 can be used.
- the wavelength of the irradiation light is not particularly limited, and for example, irradiation light having a wavelength of 360 nm or less can be used. Such light can be obtained using a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like.
- the composition containing the thermosetting monomer when cured, for example, it can be cured by heating at 60 to 140 ° C. for 1 to 60 minutes.
- the heating temperature and the heating time can be selected according to the type of the thermosetting monomer contained in the composition.
- a metal oxide layer may be formed between the color difference adjusting layer and the transparent conductive layer as necessary.
- components constituting the metal oxide layer include metal oxides such as silicon oxide, aluminum oxide, titanium oxide, magnesium oxide, zinc oxide, indium oxide, and tin oxide.
- the metal oxide layer include a layer having a thickness of 0.5 to 5.0 nm.
- the adhesion between the layers can be improved.
- the presence of the metal oxide layer has an advantage that the performance such as durability of the laminate is improved.
- the metal oxide layer can be formed by a known method.
- a method for forming the metal oxide layer for example, a physical formation method such as a DC magnetron sputtering method, an RF magnetron sputtering method, an ion plating method, a vacuum deposition method, or a pulse laser deposition method (Physical Vapor Deposition, hereinafter referred to as “PVD method”).
- PVD method Physical Vapor Deposition
- the DC magnetron sputtering method which can form a metal oxide layer with a uniform thickness and is excellent in industrial production, is particularly preferable.
- chemical formation methods such as Chemical Vapor Deposition (hereinafter referred to as “CVD method”) and sol-gel method can also be used.
- the target used in the sputtering method is preferably a metal target.
- a reactive sputtering method is widely used. This is because it is difficult to use the DC magnetron sputtering method in the case of a metal oxide target because an oxide of an element used as a metal oxide layer is often an insulator.
- a pseudo RF magnetron sputtering method in which formation of an insulator on the target is suppressed by discharging the two cathodes simultaneously can also be used.
- a transparent conductive layer is formed on a color difference adjusting layer or a metal oxide layer.
- a metal layer or a metal compound layer can be mentioned.
- the component constituting the transparent conductive layer include metal oxide layers such as silicon oxide, aluminum oxide, titanium oxide, magnesium oxide, zinc oxide, indium oxide, and tin oxide.
- a crystalline layer mainly composed of indium oxide is preferable, and a layer made of crystalline ITO (Indium Tin Oxide) is particularly preferably used.
- the crystal grain size need not be particularly limited, but is preferably 500 nm or less. If the crystal grain size exceeds 500 nm, the bending durability deteriorates, which is not preferable.
- the crystal grain size is defined as the largest diagonal line or diameter in each polygonal or oval region observed under a transmission electron microscope (TEM).
- TEM transmission electron microscope
- the transparent conductive layer can be formed by a known method, for example, a physical forming method such as a DC magnetron sputtering method, an RF magnetron sputtering method, an ion plating method, a vacuum deposition method, a pulse laser deposition method, etc. Can be used. Focusing on industrial productivity of forming a metal compound layer having a uniform film thickness over a large area, the DC magnetron sputtering method is desirable. In addition to the physical formation method (PVD), a chemical formation method such as a chemical vapor deposition method or a sol-gel method can be used, but the sputtering method is desirable from the viewpoint of film thickness control.
- PVD physical formation method
- a chemical formation method such as a chemical vapor deposition method or a sol-gel method can be used, but the sputtering method is desirable from the viewpoint of film thickness control.
- the film thickness of the transparent conductive layer is preferably 5 to 50 nm from the viewpoint of transparency and conductivity. More preferably, it is 5 to 30 nm. If the thickness of the transparent conductive layer is less than 5 nm, the resistance value tends to be inferior in stability with time. If the thickness exceeds 50 nm, the bending durability is lowered and coloring due to the transparent conductive layer becomes strong.
- the surface resistance value of the transparent conductive layer is 10 to 2000 ⁇ / ⁇ at a film thickness of 10 to 40 nm due to reduction of power consumption of the touch panel and circuit processing. It is preferable to use a transparent conductive layer exhibiting a range of 30 to 1000 ⁇ / ⁇ .
- a wet dispersion method for example, spin coating method, gravure, slot die, printing, etc.
- a dispersion liquid in which metal nanowires, carbon nanotubes, conductive oxide fine particles and the like are dispersed.
- a layer formed by the above can also be used.
- the transparent conductive layer thus formed is subjected to pattern formation by etching.
- This etching process is generally performed by covering the transparent conductive layer with a pattern formation mask and then etching the transparent conductive layer using an etching solution such as an acidic aqueous solution.
- the etchant include inorganic acids such as hydrogen chloride, hydrogen bromide, sulfuric acid, nitric acid, and phosphoric acid, organic acids such as acetic acid, and mixtures thereof, and aqueous solutions thereof.
- ITO in which the transparent conductive layer is crystallized by heat treatment, there is an advantage that transparency and conductivity can be improved by performing the heat treatment.
- the heat treatment can be performed, for example, by heating at 100 to 150 ° C. for 15 to 180 minutes.
- the reflectance (R1) when the transparent conductive laminate is irradiated with a light source having a wavelength in the range of 500 to 750 nm, and the transparent conductive laminate is converted into 12N hydrochloric acid, 16N After being dipped in a strong acid aqueous solution obtained by mixing nitric acid and water at a mass ratio of 12N hydrochloric acid: 16N nitric acid: water 3.3: 1.0: 7.6 at 40 ° C. for 3 minutes and then dried.
- the difference ⁇ R between R1 and R2 is 1 or less in the reflectance (R2) when the transparent conductive laminate is irradiated with a light source having a wavelength in the range of 500 to 750 nm.
- the strong acid aqueous solution is a so-called aqua regia strong acid aqueous solution that is generally used in an etching process. By performing the etching process using the strong acid aqueous solution, the transparent conductive layer is etched.
- FIG. 1 is a schematic explanatory diagram showing an etched transparent conductive laminate.
- the transparent conductive laminate (10) has a high refractive index anti-blocking layer (3), a color difference adjusting layer (5), and a transparent conductive layer (7) sequentially on one surface of the transparent polymer substrate (1).
- the portion indicated by (11) is a portion where the transparent conductive layer (7) has been removed by patterning by the etching treatment, and the portion indicated by (13) is a portion masked by the etching treatment.
- the transparent conductive layer is left as it is.
- the reflectance R1 means the reflectance at the portion (13) in FIG. 1
- the reflectance R2 means the reflectance at the portion (11) in FIG.
- the transparent conductive laminate of the present invention is characterized in that the difference ⁇ R between R1 and R2 is 1 or less in the reflectance when irradiated with a light source having a wavelength in the range of 500 to 750 nm. That is, in the transparent conductive laminate of the present invention, there is almost no difference in reflectance between the portion where the transparent conductive layer (7) is present and the portion where it is not present. Thereby, extremely high visibility was achieved.
- the reflectance of the transparent conductive laminate can be measured using a spectrophotometer such as Hitachi U-3000, for example, and the spectral reflectance at an incident angle of 10 degrees can be measured according to JIS K5600-4-5. it can.
- the haze value (H1) of the transparent conductive laminate, the transparent conductive laminate, 12N hydrochloric acid, 16N nitric acid and water, 12N hydrochloric acid: 16N nitric acid: water 3.
- the difference in haze value (H2) of the transparent conductive laminate after being dipped in a strong acid aqueous solution obtained by mixing at a mass ratio of 3: 1.0: 7.6 at 40 ° C. for 3 minutes and then dried. ⁇ H is preferably 0.3% or less.
- the haze value H1 means a haze value at a portion (13) in FIG. 1
- the haze value H2 means a haze value at a portion (11) in FIG.
- the difference (DELTA) H of haze value H1 and H2 is 0.3% or less.
- the transparent conductive laminate of the present invention there is almost no difference in haze value between the portion where the transparent conductive layer (7) is present and the portion where it is not present. Thereby, extremely high visibility was achieved.
- the haze value of the transparent conductive laminate is calculated from the following formula in accordance with JIS K7105.
- H Haze (cloudiness value) (%)
- T d Diffuse transmittance (%)
- T t Total light transmittance (%)
- the total light transmittance (T t (%)) is calculated by the following equation by measuring the incident light intensity (T 0 ) with respect to the laminate and the total transmitted light intensity (T 1 ) transmitted through the laminate. .
- the haze value can be measured using, for example, a haze meter (manufactured by Suga Test Instruments Co., Ltd.).
- the transparent conductive laminate of the present invention has a structure in which a high refractive index anti-blocking layer, a color difference adjusting layer, and a transparent conductive layer are sequentially laminated on one surface of a transparent polymer substrate.
- an anti-blocking layer may be formed on the other surface of the transparent polymer base material as necessary.
- anti-blocking layer may be the above-described high-refractive index anti-blocking layer, or may be an anti-blocking layer that does not correspond to the high-refractive index anti-blocking layer in the present invention.
- compositions for forming an antiblocking layer that does not correspond to the high refractive index antiblocking layer in the present invention include an antiblocking layer forming composition containing a first component and a second component.
- the difference ⁇ SP between the SP value (SP1) of the first component and the SP value (SP2) of the second component is in the range of 1 to 2, and after coating the anti-blocking layer forming composition, the first component and the second component More preferably, the composition is an anti-blocking layer-forming composition in which the component causes phase separation and an anti-blocking layer having fine irregularities on the surface is formed.
- An unsaturated double bond-containing acrylic copolymer is used as the first component.
- An unsaturated double bond-containing acrylic copolymer is, for example, a resin obtained by copolymerizing a (meth) acrylic monomer and another monomer having an ethylenically unsaturated double bond, a (meth) acrylic monomer and another ethylenically unsaturated Acrylic acid or glycidyl acrylate for resins reacted with monomers having double bonds and epoxy groups, resins made by reacting (meth) acrylic monomers with other monomers having ethylenically unsaturated double bonds and isocyanate groups, etc. And those having an unsaturated double bond and other functional groups added thereto.
- the unsaturated double bond-containing acrylic copolymers may be used alone, or two or more thereof may be mixed and used.
- the unsaturated double bond-containing acrylic copolymer preferably has a weight average molecular weight of 2,000 to 100,000, more preferably 5,000 to 50,000.
- the monomer or oligomer of the second component is a polyfunctional unsaturated double bond-containing monomer or oligomer thereof.
- oligomer refers to a polymer having a repeating unit, wherein the number of repeating units is 3 to 10.
- a polyfunctional unsaturated double bond-containing monomer for example, a polyfunctional acrylate which is a dealcoholization reaction product of a polyhydric alcohol and (meth) acrylate, specifically, dipentaerythritol hexa (meth) acrylate, dipenta Erythritol penta (meth) acrylate, trimethylolpropane tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, neopentyl glycol di (meth) acrylate, and the like can be used.
- a polyfunctional acrylate which is a dealcoholization reaction product of a polyhydric alcohol and (meth) acrylate, specifically, dipentaerythritol hexa (meth) acrylate, dipenta Erythritol penta (meth) acrylate, trimethylolpropane tri (meth) acrylate, ditrimethylol
- an acrylate monomer having a polyethylene glycol skeleton such as polyethylene glycol # 200 diacrylate (manufactured by Kyoeisha Chemical Co., Ltd.) can also be used.
- polyethylene glycol # 200 diacrylate manufactured by Kyoeisha Chemical Co., Ltd.
- One of these polyfunctional unsaturated double bond-containing monomers may be used alone, or two or more thereof may be mixed and used.
- the second component is more preferably a polyfunctional acrylate.
- Preferred organic solvents when the first component and the second component are the above combinations include, for example, ketone solvents such as methyl ethyl ketone, acetone, methyl isobutyl ketone, and cyclohexanone; alcohol solvents such as methanol, ethanol, propanol, isopropanol, and butanol
- An ether solvent such as anisole, phenetol propylene glycol monomethyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, and diethylene glycol diethyl ether; One of these solvents may be used alone, or two or more organic solvents may be mixed and used.
- the anti-blocking layer forming composition preferably contains a photopolymerization initiator.
- the photopolymerization initiator include 2-hydroxy-2methyl-1phenyl-propan-1-one, 1-hydroxy-cyclohexyl-phenyl-ketone, 2-methyl-1- [4- (methylthio) phenyl] -2 -Morpholinopropan-1-one, 2,2-dimethoxy-1,2-diphenylethane-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1, etc. Can be mentioned.
- phase separation is caused by the difference in SP value between the first component and the second component.
- the difference between the SP value of the first component and the SP value of the second component is preferably 1 or more, and more preferably in the range of 1 to 2.
- the compatibility of the resins with each other is low, whereby the first component and the second component are applied after application of the anti-blocking layer forming composition. It is thought that phase separation is brought about.
- the anti-blocking layer forming composition may contain conventional additives such as an antistatic agent, a plasticizer, a surfactant, an antioxidant, and an ultraviolet absorber, if necessary.
- the anti-blocking layer-forming composition may contain a commonly used resin.
- the anti-blocking layer forming composition is characterized in that, by using the first component and the second component as described above, a resin layer having irregularities can be formed without including resin particles or the like. . Therefore, it is preferable that the anti-blocking layer forming composition does not contain resin particles.
- the anti-blocking layer forming composition may contain at least one or more inorganic particles, organic particles, or a composite thereof, if necessary. These particles are not particularly added for the purpose of forming irregularities on the surface, but are added to form more uniform and fine irregularities by controlling phase separation and precipitation. These particles have an average particle size of 0.5 ⁇ m or less, preferably 0.01 to 0.3 ⁇ m. When it exceeds 0.5 ⁇ m, the transparency slightly decreases.
- inorganic particles include silica, alumina, titania, zeolite, mica, synthetic mica, calcium oxide, zirconium oxide, zinc oxide, magnesium fluoride, smectite, synthetic smectite, vermiculite, ITO (indium oxide / tin oxide), ATO There may be mentioned at least one selected from the group consisting of (antimony oxide / tin oxide), tin oxide, indium oxide and antimony oxide.
- organic particles include at least one selected from the group consisting of acrylic, olefin, polyether, polyester, urethane, polyester, silicone, polysilane, polyimide, and fluorine particles.
- the anti-blocking layer forming composition is prepared by mixing the first component and the second component, and additives such as a solvent, a photopolymerization initiator, a catalyst, and a photosensitizer as necessary.
- the ratio of the first component to the second component in the anti-blocking layer forming composition is preferably 0.1: 99.9 to 50:50, more preferably 0.3: 99.7 to 20:80, and 0 5: 99.5 to 10:90 is more preferable.
- the first component, the second component, and other resin as necessary are 100 parts by mass. 0.01 to 20 parts by mass, preferably 1 to 10 parts by mass can be added.
- a solvent is used, 1 to 9900 parts by mass, preferably 10 to 900 parts by mass can be added to 100 parts by mass of the resin component.
- the anti-blocking layer having fine irregularities on the surface can be formed by applying the anti-blocking layer forming composition and then curing the composition.
- the coating method of the anti-blocking layer forming composition include dip coating, air knife coating, curtain coating, roller coating, wire bar coating, gravure coating, and extrusion coating.
- the thickness of the anti-blocking layer include an embodiment having a thickness of 0.01 to 20 ⁇ m.
- the anti-blocking layer-forming composition After coating the anti-blocking layer-forming composition, it can be phase-separated and cured by irradiation with light.
- the light to be irradiated for example, light having an exposure amount of 0.1 to 3.5 J / cm 2 , preferably 0.5 to 1.5 J / cm 2 can be used.
- the wavelength of the irradiation light is not particularly limited, and for example, irradiation light having a wavelength of 360 nm or less can be used. Such light can be obtained using a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like. By irradiating light in this way, phase separation and curing will occur.
- the touch panel of the present invention has the transparent conductive laminate.
- Examples of the touch panel of the present invention include a capacitive touch panel.
- the layer structure in the case where the transparent conductive laminate of the present invention is used as a touch panel substrate include the following structures: Transparent conductive layer / color difference adjusting layer / high refractive index anti-blocking layer / transparent polymer substrate, Transparent conductive layer / metal oxide layer / color difference adjusting layer / high refractive index anti-blocking layer / transparent polymer substrate, Transparent conductive layer / color difference adjusting layer / high refractive index anti-blocking layer / transparent polymer substrate / anti-blocking layer, Transparent conductive layer / metal oxide layer / color difference adjusting layer / high refractive index anti-blocking layer / transparent polymer substrate / anti-blocking layer, Transparent conductive layer / color difference adjusting layer / high refractive index antiblocking layer / transparent polymer substrate / high refractive index antiblocking layer / transparent conductive layer, Transparent conductive layer / metal oxide layer / color difference adjusting layer / color difference adjusting layer / transparent polymer substrate
- the auxiliary electrode layer mentioned here means a layer that can be used as an electrode material for wiring.
- a material for the auxiliary electrode layer a material having a specific resistance of 1 ⁇ 10 ⁇ 6 ⁇ cm or more and 1 ⁇ 10 ⁇ 4 ⁇ cm or less is desirable.
- a metal material having a specific resistance of less than 1 ⁇ 10 ⁇ 6 ⁇ cm is used, it is unstable in terms of application function, and it becomes difficult to form a thin film.
- a metal material having a specific resistance greater than 1 ⁇ 10 ⁇ 4 ⁇ cm is used, the resistance value is too high, and thus the resistance value becomes high when thin wire processing is performed.
- a metal suitable for practical use is recommended to be a single metal selected from the group consisting of Cu, Ag, Al, Au, Ni, Ni / Cr, and Ti, or an alloy composed of a plurality of types.
- it is a metal with high electrical conductivity and excellent workability such as pattern etching and electroplating, and has good electrical and mechanical connectivity (solder, anisotropic conductive connector, etc.) between the electrode and the lead portion of the circuit, Cu, Al, and the like are preferable in terms of bending resistance, high thermal conductivity, and low cost, and Cu is particularly preferable.
- the thickness of the auxiliary electrode layer is not particularly limited, but a normal design specification of 0.001 to 100 ⁇ m, preferably 0.01 to 25 ⁇ m is recommended.
- a known treatment method can be used for forming the auxiliary electrode, but it is preferable to form the auxiliary electrode by a sputtering method. Further, if necessary, the electroconductivity may be increased by further increasing the film thickness by electrolysis / electroless wet metal plating.
- a refractory metal layer made of Ni, Ni / Cr, Cr, Ti, Mo, or the like is formed on the upper and lower layers of the auxiliary electrode layer as necessary.
- An oxide layer may be provided.
- phenol novolac type epoxy resin solution Methoquinone 1000 ppm and triphenylphosphine 2000 ppm are added to 100 parts by mass of the solid content of the obtained phenol novolac type epoxy resin, and acrylic acid is added dropwise at 100 ° C. until the acid value becomes 1 mg KOH / g or less.
- a phenol novolac type epoxy acrylate (1) was obtained.
- the obtained phenol novolak epoxy acrylate (1) had a weight average molecular weight of 950, a hydroxyl value of 140 mgKOH / g, and a refractive index of 1.572.
- Preparation Example 1 Preparation of Phase Separation Type Anti-Blocking Layer Forming Composition (I) As the first component, 10 g of unsaturated double bond-containing acrylic copolymer (I) obtained in Production Example 3 was used as the second component. 100 g of dipentaerythritol hexaacrylate (SP value: 12.1) and 5 g of Irgacure 184 as a reactive photopolymerization initiator are sequentially mixed, 245 g of isobutyl alcohol is added and dissolved, and a phase separation type anti-blocking layer forming composition is obtained. Obtained.
- SP value dipentaerythritol hexaacrylate
- Irgacure 184 as a reactive photopolymerization initiator
- Example E1 As the component (A) for forming the hard coat layer, the phenol novolac epoxy acrylate (1) obtained in Production Example 1 is used, and as the component (B), ethoxylated orthophenylphenol acrylate (acrylate having 1 mol of ethoxy structure in the molecule) is used.
- a hard coating composition was prepared using a viscosity of 130 mPa ⁇ s at 25 ° C. and a refractive index of 1.577). The raw materials shown in Table 1 were sequentially mixed at the solid content mass shown in Table 1 and stirred to obtain a hard coating composition.
- the viscosity of the ethoxylated orthophenylphenol acrylate of component (B) was measured using a B-type viscometer (TVB-22L manufactured by Toki Sangyo Co., Ltd.). 100 ml of the test sample was collected in a glass container, adjusted to a temperature of 20 ° C., and then measured using a M1Rotor at a rotation speed of 60 rpm. The refractive index of component (B) was measured according to JIS K0062.
- the obtained hard coating composition was dropped onto a Teijin Chemicals 100 ⁇ m optical PC film (Pure Ace) and coated using a bar coater # 9. After coating, the film was dried at 70 ° C. for 1 minute, and irradiated with 350 mJ of ultraviolet light with an ultraviolet irradiator (manufactured by Fusion) to form a hard coat layer having a thickness of 3.0 ⁇ m on the polycarbonate film.
- Formation of color difference adjusting layer A 15% titanium oxide dispersion having an average particle diameter of 40 nm is diluted to 5% with isobutyl alcohol, and a urethane acrylate (manufactured by Negami Kogyo Co., Ltd., UN-3320HS), which is a monomer having UV curing performance, is added to MIBK (methyl). What was diluted to 5% with isobutyl ketone) was prepared. 40 parts by mass of the diluted titanium oxide dispersion and 0.25 parts by mass of the photopolymerization initiator (Irgacure 184 manufactured by BASF) are mixed with 100 parts by mass of the urethane acrylate diluted liquid, and further IBA (isobutyl).
- amorphous ITO was formed by sputtering using an indium oxide-tin oxide target having a composition of indium oxide and tin oxide of 95: 5 and a filling density of 98%. A layer was formed. The thickness of the formed ITO layer was about 20 nm, and the surface resistance value after film formation was about 210 ⁇ / ⁇ . Subsequently, a heat treatment was performed at 130 ° C. for 90 minutes, and the transparent conductive layer (ITO layer) was crystallized to produce a transparent conductive laminate. The surface resistance value of the transparent conductive layer after the ITO layer was crystallized was about 150 ⁇ / ⁇ . The characteristics of the produced transparent conductive laminate are shown in Table 1.
- Examples E2 to E5 In the formation of the hard coat layer, a hard coating layer was formed in the same procedure as in Example 1 except that the composition of the hard coating composition was changed to that shown in Table 1. Thereafter, in the formation of the color difference adjusting layer, the color difference adjusting layer is formed on the hard coating layer in the same procedure as in Example 1, except that the diluted liquid filling amount of the titanium oxide dispersion is changed to the amount shown in Table 1. Formed. Further, a transparent conductive layer was produced on the color difference adjusting layer in the same procedure as in Example 1. In Example E3, a transparent conductive laminate was produced using a 70 ⁇ m optical PC film (Pure Ace) C110 manufactured by Teijin Chemicals.
- Examples E6 to E10, E12, E14, E15 In the formation of the hard coat layer, the hard coating layer was formed in the same procedure as in Example 1. Thereafter, in the formation of the color difference adjusting layer, the color difference adjusting layer is formed on the hard coating layer in the same procedure as in Example E1, except that the diluted liquid filling amount of the titanium oxide dispersion is changed to the amount shown in Table 1. Formed. Further, a transparent conductive layer was produced on the color difference adjusting layer in the same procedure as in Example E1. In Examples E7 and E8, a transparent conductive laminate was produced using a 188 ⁇ m optical PET film (Teijin Tetron KEFW) manufactured by Teijin DuPont.
- Example 9 a transparent conductive laminate was produced using a 125 ⁇ m optical PET film (Teijin Tetron KEFW) manufactured by Teijin DuPont.
- Example E10 a transparent conductive laminate was produced using a Teijin DuPont 50 ⁇ m optical PET film (Teijin Tetron KEL86W).
- Example E14 a transparent conductive laminate was produced using a 75 ⁇ m optical modified PC film (Pure Ace WR W-142) manufactured by Teijin Chemicals.
- Example E15 a transparent conductive laminate was produced using a modified PC film (Pure Ace WR S-148) manufactured by Teijin Chemicals Limited for 50 ⁇ m optics.
- Example E11 In forming the hard coat layer, a hard coating layer was formed in the same procedure as in Example E1. Thereafter, in the formation of the color difference adjusting layer, a 15% titanium oxide dispersion having an average particle size of 40 nm is diluted to 5% with isobutyl alcohol, and a urethane acrylate that is a monomer having ultraviolet curing performance (UN-3320HS, manufactured by Negami Kogyo Co., Ltd.). Was diluted to 5% with MIBK.
- a 15% titanium oxide dispersion having an average particle size of 40 nm is diluted to 5% with isobutyl alcohol, and a urethane acrylate that is a monomer having ultraviolet curing performance (UN-3320HS, manufactured by Negami Kogyo Co., Ltd.).
- the diluted titanium oxide dispersion and 0.25 parts by weight of the photopolymerization initiator (Irgacure 184 manufactured by BASF) are mixed with 100 parts by weight of the urethane acrylate diluted liquid, and further 2 by IBA.
- the solution diluted to 5% was applied using a bar coater # 3. After coating, the coating was dried at 70 ° C. for 1 minute, and irradiated with 350 mJ of ultraviolet light with a UV irradiator (manufactured by Fusion) in a nitrogen atmosphere to form the color difference adjusting layer 1 on the hard coat layer.
- Example E13 In the formation of the color difference adjusting layer 2, 5 parts by mass of a photopolymerization initiator (Irgacure 184: manufactured by BASF) is mixed with 100 parts by mass of silicon acrylate (EB-1360: manufactured by Daicel Cytec), and methyl isobutyl ketone is used. A hard coating layer, a color difference adjustment layer 1, a color difference adjustment layer 2, a transparent conductive layer, and the like in the same order as in Example E11, except that the adjustment liquid diluted to 2.5% is used. Formed.
- a photopolymerization initiator Irgacure 184: manufactured by BASF
- silicon EB-1360 manufactured by Daicel Cytec
- Example E14 Formation of anti-blocking layer
- the phase separation type obtained in Preparation Example 1 was used on the surface on which the hard coat layer was not formed, with the coating film having a hard coat layer formed by the same procedure as in Example E1.
- the anti-blocking layer forming composition (I) was applied using a bar coater # 9. After coating, the film is dried at 70 ° C. for 1 minute, irradiated with 350 mJ of ultraviolet light with an ultraviolet irradiator (manufactured by Fusion), and a phase with a thickness of 3.0 ⁇ m is formed on the back surface of the coating film on which the hard coat layer is formed.
- a separation type anti-blocking layer was formed. Thereafter, a color difference adjusting layer was formed on the hard coating layer in the same procedure as in Example 1. Further, a transparent conductive layer was produced on the color difference adjusting layer in the same procedure as in Example 1.
- Comparative Examples E1 to E2 A transparent conductive laminate was produced in the same manner as in Example E1, except that a hard coat layer was produced using the hard coating composition obtained by the formulation shown in Table 2.
- Comparative Examples E3 to E9 A transparent conductive laminate was produced in the same manner as in Example E9, except that a hard coat layer was produced using the hard coating composition obtained by the formulation shown in Table 2.
- Comparative Example E10 A transparent conductive laminate was produced in the same manner as in Example E9, except that in the formation of the color difference adjusting layer, the diluted liquid filling amount of the titanium oxide dispersion was changed to the amount shown in Table 2.
- the reflectance of the transparent conductive laminates obtained in the examples and comparative examples was measured according to JIS K5600-4. In accordance with -5, the reflectance R1 was measured. The wavelength of the light source used in the reflectance measurement was 500 to 750 nm.
- the transparent conductive laminate was irradiated with light having a wavelength of 500 to 750 nm, and the reflectance R2 was measured.
- the reflectance R1 means the reflectance of the portion where the transparent conductive layer exists as shown in the portion (13) in FIG. 1, and the reflectance R2 is the portion (11) in FIG.
- the difference between R1 and R2 thus obtained was taken as ⁇ R.
- Tables 1 and 2 show the values of ⁇ R where ⁇ R is the maximum between wavelengths of 500 to 750 nm.
- haze value difference ⁇ H The haze values of the transparent conductive laminates obtained in Examples and Comparative Examples were measured using a haze meter (manufactured by Suga Test Instruments Co., Ltd.) in accordance with JIS K7105. The value H1 was obtained.
- the haze value H1 means the haze value of the portion where the transparent conductive layer is present as shown in the portion (13) in FIG. 1, and the haze value H2 is shown in the portion (11) in FIG. This means the haze value of the portion where the transparent conductive layer does not exist.
- the difference between H1 and H2 obtained in this way was taken as ⁇ H.
- the interference fringe evaluation test piece was bonded to a 100 ⁇ 100 mm black acrylic plate using an optical film adhesive so that the coated surface was on the surface.
- a sample is placed at a distance of 10 cm vertically from the fluorescent tube of a stand-type three-wavelength fluorescent lamp (SLH-399 manufactured by TWINBARD) and visually observed. Visual observation was performed and judged based on the following evaluation criteria.
- ⁇ Interference fringes (interference patterns) are not visually recognized under a three-wavelength fluorescent lamp or under sunlight
- ⁇ Interference fringes (interference patterns) are not visually recognized under a three-wavelength fluorescent lamp, but slightly visible under sunlight
- ⁇ Interference fringes (interference patterns) are slightly visible
- ⁇ Interference fringes (interference patterns) are clearly visible
- ⁇ Difficult to distinguish between pattern part and non-pattern part under sunlight and under three-wavelength fluorescent lamp ⁇ : Slightly distinguishable between pattern part and non-pattern part under sunlight, but pattern part under three-wavelength fluorescent lamp Difficult to distinguish between non-patterned part and ⁇ : Slightly distinguishable between pattern part and non-patterned part under 3-wavelength fluorescent lamp ⁇ : Easy to distinguish between pattern part and non-patterned part under 3-wavelength fluorescent lamp
- Adhesion evaluation An adhesion test was performed according to JIS K5400.
- the transparent conductive laminates obtained in Examples and Comparative Examples were cross-cut using a cutter knife so that 100 1 mm 2 cuts (cross cuts) could be made.
- the cellophane adhesive tape was completely adhered on the created grid, and one end of the tape was lifted and peeled upward. This peeling operation was performed three times at the same location. Thereafter, the number of grids peeled off was determined according to the criteria described below. 10: No peeling 8: Peeling is within 5 eyes 6: Peeling is over 5 eyes and is within 15 eyes 4: Peeling is over 15 eyes and within 35 eyes 2: Peeling is over 35 eyes It is within 65 eyes 0: Peeling exceeds 65 eyes and is within 100 eyes
- I-184 1-hydroxycyclohexyl phenyl ketone, photopolymerization initiator bisphenol A EO-modified diacrylate: manufactured by Toagosei Co., Ltd., Aronix M-211B, bisphenol A EO (2 mol) -modified diacrylate
- high refractive index filler 1 zirconia ZRMIBK30WT % (Zirconium oxide, manufactured by CIK Nanotech)
- High refractive index filler 2 Titania TiMIBK15WT% (titanium oxide, manufactured by CIK Nanotech)
- Bifunctional urethane acrylate NV100: CN-9893 (manufactured by Sartomer) Indicates.
- ⁇ R is 1 or less and ⁇ H is 0.3% or less. Thereby, even after performing the etching process, it can be confirmed that extremely excellent visibility is secured.
- the transparent conductive laminate of the present invention was further free from interference fringes, was excellent in etching mark performance, and was excellent in adhesion.
- the phase separation type anti-blocking layer is formed on the back surface, but the anti-blocking layer can be formed without impairing the properties of excellent visibility, interference fringes, etching mark property, and adhesion. It can be confirmed that it can also be formed on a transparent conductive laminate having a winding property.
- Comparative Examples E1 and E2 are examples in which the amounts of components (A) and (B) are outside the scope of the present invention. In these cases, ⁇ H exceeded 0.3%, and visibility was lowered. Comparative Example E3 is an example using a diacrylate having a bisphenol A skeleton instead of the component (A). In Comparative Example 3, ⁇ R exceeded 1 and the visibility was lowered. In addition, generation of interference fringes was confirmed. Comparative Example E4 is an example using acryloylmorpholine instead of component (B). In Comparative Example E4, ⁇ R exceeded 1 and visibility was lowered. In addition, generation of interference fringes was confirmed.
- Comparative examples E5 and E6 are examples in which zirconia oxide or titanium oxide, which is a high refractive index agent, is used instead of using components (A) and (B). In these comparative examples, ⁇ R greatly exceeded 1, and the visibility was greatly reduced. In addition, generation of interference fringes was confirmed.
- Comparative Examples E7 to E9 are examples using bifunctional urethane acrylate for the purpose of imparting extensibility to the hard coat layer. In these comparative examples, even when the extensibility was improved by using a bifunctional urethane acrylate in the formation of the hard coat layer, ⁇ R exceeded 1, and good visibility could not be obtained. Comparative Example E10 is an example in which the total amount of particles contained in the color difference adjustment layer exceeds 200 parts by mass with respect to 100 parts by mass of the cured resin component. In this case, the adhesiveness was lowered.
- FIG. 2 is a graph of the reflectance of the transparent conductive laminate obtained in Example E9
- FIG. 3 is a graph of the reflectance of the transparent conductive laminate obtained in Comparative Example E4. As shown in these graphs, it can be seen that the transparent conductive laminate of the example has a very small difference in reflectance between the portion where the transparent conductive layer exists and the portion where the transparent conductive layer does not exist in the visible light range.
- Example F1 As the component (A) for forming the hard coat layer, the phenol novolac epoxy acrylate (1) obtained in Production Example 1 is used, and as the component (B), ethoxylated orthophenylphenol acrylate (acrylate having 1 mol of ethoxy structure in the molecule) is used.
- the raw materials shown in Table 1 were sequentially mixed at the solid content mass shown in Table 1 and stirred to obtain a hard coating composition.
- the viscosity of the ethoxylated orthophenylphenol acrylate of component (B) was measured using a B-type viscometer (TVB-22L manufactured by Toki Sangyo Co., Ltd.). 100 ml of the test sample was collected in a glass container, adjusted to a temperature of 20 ° C., and then measured using a M1Rotor at a rotation speed of 60 rpm.
- the refractive index of component (B) was measured according to JIS K0062.
- the obtained hard coating composition was dropped onto a Teijin Chemicals 100 ⁇ m optical PC film (Pure Ace) and coated using a bar coater # 9. After coating, the film was dried at 70 ° C. for 1 minute, and irradiated with 350 mJ of ultraviolet light with an ultraviolet irradiator (manufactured by Fusion) to form a hard coat layer having a thickness of 3.0 ⁇ m on the polycarbonate film.
- Formation of color difference adjusting layer A 15% titanium oxide dispersion having an average particle diameter of 40 nm is diluted to 5% with isobutyl alcohol, and a urethane acrylate (manufactured by Negami Kogyo Co., Ltd., UN-3320HS), which is a monomer having UV curing performance, is added to MIBK (methyl). What was diluted to 5% with isobutyl ketone) was prepared. 40 parts by mass of the diluted titanium oxide dispersion and 0.25 parts by mass of the photopolymerization initiator (Irgacure 184 manufactured by BASF) are mixed with 100 parts by mass of the urethane acrylate diluted liquid, and further IBA (isobutyl).
- amorphous ITO was formed by sputtering using an indium oxide-tin oxide target having a composition of indium oxide and tin oxide of 95: 5 and a filling density of 98%. A layer was formed. The thickness of the formed ITO layer was about 20 nm, and the surface resistance value after film formation was about 210 ⁇ / ⁇ . Subsequently, a heat treatment was performed at 130 ° C. for 90 minutes, and the transparent conductive layer (ITO layer) was crystallized to produce a transparent conductive laminate. The surface resistance value of the transparent conductive layer after the ITO layer was crystallized was about 150 ⁇ / ⁇ . The characteristics of the produced transparent conductive laminate are shown in Table 1.
- Examples F2 to F5, F7 to F9 In forming the hard coat layer, the composition of the hard coating composition was changed to that shown in Table 3. Thereafter, in the formation of the color difference adjusting layer, in the formation of the color difference adjusting layer, the hard coating is performed in the same procedure as in Example F1, except that the diluted liquid filling amount of the titanium oxide dispersion is changed to the amount shown in Table 1. A color difference adjusting layer was formed on the layer. Further, a transparent conductive layer was produced on the color difference adjusting layer in the same procedure as in Example F1. In Example F2, a transparent conductive laminate was produced using a Teijin DuPont 188 ⁇ m optical PET film (Teijin Tetron KEFW).
- Example F3 and F7 a transparent conductive laminate was prepared using a Teijin DuPont 125 ⁇ m optical PET film (Teijin Tetron KEFW).
- a transparent conductive laminate was prepared using a 50 ⁇ m optical PET film (Teijin Tetron KEL86W) manufactured by Teijin DuPont.
- Example F8 a transparent conductive laminate was produced using a 75 ⁇ m optical modified PC film (Pure Ace WR W-142) manufactured by Teijin Chemicals.
- Example F9 a transparent conductive laminate was produced using a modified PC film (Pure Ace WR S-148) manufactured by Teijin Chemicals Limited for 50 ⁇ m optics.
- Ogsol EA-F5503 manufactured by Osaka Gas Chemical Co., Ltd. was used as the component (C).
- Example F6 In forming the hard coat layer, a hard coating layer was formed in the same procedure as in Example F3. Thereafter, in the formation of the color difference adjusting layer, a 15% titanium oxide dispersion having an average particle size of 40 nm is diluted to 5% with isobutyl alcohol, and a urethane acrylate that is a monomer having ultraviolet curing performance (UN-3320HS, manufactured by Negami Kogyo Co., Ltd.). Was diluted to 5% with MIBK.
- a 15% titanium oxide dispersion having an average particle size of 40 nm is diluted to 5% with isobutyl alcohol, and a urethane acrylate that is a monomer having ultraviolet curing performance (UN-3320HS, manufactured by Negami Kogyo Co., Ltd.).
- the diluted titanium oxide dispersion and 0.25 parts by weight of the photopolymerization initiator (Irgacure 184 manufactured by BASF) are mixed with 100 parts by weight of the urethane acrylate diluted liquid, and further 2 by IBA.
- the solution diluted to 5% was applied using a bar coater # 3. After coating, the coating was dried at 70 ° C. for 1 minute, and irradiated with 350 mJ of ultraviolet light with a UV irradiator (manufactured by Fusion) in a nitrogen atmosphere to form the color difference adjusting layer 1 on the hard coat layer.
- Comparative Examples F1 to F2 A transparent conductive laminate was produced in the same manner as in Example F1, except that a hard coat layer was produced using the hard coating composition obtained by the formulation shown in Table 4.
- a transparent conductive laminate was prepared using a 125 ⁇ m optical PET film (Teijin Tetron KEFW) manufactured by Teijin DuPont.
- the transparent conductive laminates obtained in the above Examples and Comparative Examples were evaluated for reflectance difference ⁇ R, haze value difference ⁇ H, interference fringe evaluation, etching mark and adhesion. The evaluation results are shown in Tables 3 and 4.
- I-184 1-hydroxycyclohexyl phenyl ketone, photopolymerization initiator bisphenol A EO-modified diacrylate: manufactured by Toagosei Co., Ltd., Aronix M-211B, bisphenol A EO (2 mol) -modified diacrylate
- high refractive index filler 1 zirconia ZRMIBK30WT % (Zirconium oxide, manufactured by CIK Nanotech)
- High refractive index filler 2 Titania TiMIBK15WT% (titanium oxide, manufactured by CIK Nanotech)
- Bifunctional urethane acrylate NV100: CN-9893 (manufactured by Sartomer) Indicates.
- ⁇ R is 1 or less and ⁇ H is 0.3% or less. Thereby, even after performing the etching process, it can be confirmed that extremely excellent visibility is secured.
- the transparent conductive laminate of the present invention was further free from interference fringes, was excellent in etching mark performance, and was excellent in adhesion.
- Comparative Example F1 is an example in which the amounts of components (A) and (C) are less than the scope of the present invention. In these cases, ⁇ R exceeded 1 and the visibility decreased. In addition, generation of interference fringes was confirmed. Comparative Example F2 is an example in which the amount of component (A) is less than the range of the present invention and the amount of component (C) is greater than the range of the present invention. In this case, ⁇ H exceeded 0.3%, and the visibility decreased.
- the obtained resin for color difference adjusting layer (C1) had a weight average molecular weight of 1550, a hydroxyl value of 85 mgKOH / g, and a maximum elongation at break of 120%.
- resin (C2) for color difference adjustment layers which is an acrylate compound which has two unsaturated double bonds was obtained.
- the obtained resin for color difference adjustment layer (C2) had a weight average molecular weight of 1450, a hydroxyl value of 94 mgKOH / g, and a maximum elongation at break of 110%.
- Example G1 As the component (A) for forming the hard coat layer, the phenol novolac epoxy acrylate (1) obtained in Production Example 1 is used, and as the component (B), ethoxylated orthophenylphenol acrylate (acrylate having 1 mol of ethoxy structure in the molecule) is used.
- a hard coating composition was prepared using a viscosity of 130 mPa ⁇ s at 25 ° C. and a refractive index of 1.577). The raw materials shown in Table 1 were sequentially mixed at the solid content mass shown in Table 1 and stirred to obtain a hard coating composition.
- the viscosity of the ethoxylated orthophenylphenol acrylate of component (B) was measured using a B-type viscometer (TVB-22L manufactured by Toki Sangyo Co., Ltd.). 100 ml of the test sample was collected in a glass container, adjusted to a temperature of 20 ° C., and then measured using a M1Rotor at a rotation speed of 60 rpm. The refractive index of component (B) was measured according to JIS K0062.
- the obtained hard coating composition was dropped onto a Teijin Chemicals 100 ⁇ m optical PC film (Pure Ace) and coated using a bar coater # 9. After coating, the film was dried at 70 ° C. for 1 minute, and irradiated with 350 mJ of ultraviolet light with an ultraviolet irradiator (manufactured by Fusion) to form a hard coat layer having a thickness of 3.0 ⁇ m on the polycarbonate film.
- amorphous ITO was formed by sputtering using an indium oxide-tin oxide target having a composition of indium oxide and tin oxide of 95: 5 and a filling density of 98%. A layer was formed. The thickness of the formed ITO layer was about 20 nm, and the surface resistance value after film formation was about 210 ⁇ / ⁇ . Subsequently, a heat treatment was performed at 130 ° C. for 90 minutes, and the transparent conductive layer (ITO layer) was crystallized to produce a transparent conductive laminate. The surface resistance value of the transparent conductive layer after the ITO layer was crystallized was about 150 ⁇ / ⁇ . The characteristics of the produced transparent conductive laminate are shown in Table 1.
- Examples G2 to G6 In the formation of the hard coat layer, a hard coating layer was formed in the same procedure as in Example G1, except that the composition of the hard coating composition was changed to that shown in Table 5. Thereafter, in the formation of the color difference adjusting layer, the color difference adjusting layer is formed on the hard coating layer in the same procedure as in Example G1, except that the diluted liquid filling amount of the titanium oxide dispersion is changed to the amount shown in Table 1. Formed. Further, a transparent conductive layer was produced on the color difference adjusting layer in the same procedure as in Example G1.
- Examples G7 to G11 In the formation of the hard coat layer, a hard coating layer was formed in the same procedure as in Example G5, except that the coating thickness of the hard coating composition was changed to that shown in Table 5. Thereafter, in the formation of the color difference adjusting layer, the color difference adjusting layer is formed on the hard coating layer in the same manner as in Example G1, except that the diluted liquid filling amount of the titanium oxide dispersion is changed to the amount shown in Table 5. Formed. Further, a transparent conductive layer was produced on the color difference adjusting layer in the same procedure as in Example G1. In Example G7, a conductive laminate was produced using the color difference adjusting resin (C2) obtained in Production Example 5 in the formation of the color difference adjusting layer.
- C2 color difference adjusting resin
- a conductive laminate was produced using a 188 ⁇ m optical PET film (Teijin Tetron KEFW) manufactured by Teijin DuPont.
- a conductive laminate was prepared using a 75 ⁇ m optical modified PC film (Pure Ace WR W-142) manufactured by Teijin Chemicals.
- a conductive laminate was prepared using a 50 ⁇ m optical modified PC film (Pure Ace WR S-148) manufactured by Teijin Chemicals.
- Comparative examples G1 to G2 A conductive laminate was produced in the same manner as in Example G1, except that a hard coat layer was produced using the hard coating composition obtained by the formulation shown in Table 6.
- Comparative Examples G3 to G9 A conductive laminate was produced in the same manner as in Example G8, except that a hard coat layer was produced using the hard coating composition obtained by the formulation shown in Table 8.
- Comparative Example G10 A conductive laminate was produced in the same manner as in Example G9 except that in the formation of the color difference adjusting layer, the diluted liquid filling amount of the titanium oxide dispersion was changed to the amount shown in Table 6.
- Comparative Examples G11 to G20 In the formation of the color difference adjusting layer, a conductive laminate was produced in the same manner as in Example G8 except that the resin for color difference adjusting layer was changed to the resin described in Table 7.
- the color difference adjusting layer resin (C3) was WJV-572 manufactured by DIC Corporation. The molecular weight was 3,600, the unsaturated double bond amount was 6, the hydroxyl value was 10 mg / KOH, and the maximum elongation at break was less than 30%.
- the resin for color difference adjustment (C4) uses WJV-573 manufactured by DIC Corporation, has a molecular weight of 2700, an unsaturated double bond amount of 6, a hydroxyl value of 25 mg / KOH, and a maximum elongation at break of less than 30%.
- the resin (C5) used is V-4025 manufactured by DIC Corporation, has a molecular weight of 1200, an unsaturated double bond amount of 6, a hydroxyl value of 12 mg / KOH, and a maximum breaking elongation of less than 30%.
- Resin for color difference adjustment uses RA-4500 manufactured by Mitsubishi Chemical Corporation, has a molecular weight of 750, an unsaturated double bond amount of 4, a hydroxyl value of 76 mg / KOH, and a maximum elongation at break of less than 30%.
- As the adjustment resin (C7) RA-5000 manufactured by Mitsubishi Chemical Corporation was used, the molecular weight was 12000, the amount of unsaturated double bonds was 2 to 3, the hydroxyl value was 62 mg / KOH, and the maximum elongation at break was 80%.
- the resin for color difference adjustment (C8) uses RA-3080 manufactured by Mitsubishi Chemical Corporation, has a molecular weight of 55000, an unsaturated double bond content of 2 to 3, a hydroxyl value of 72 mg / KOH, and a maximum elongation at break of 100%.
- the resin for color difference adjustment (C9) uses RA-3091 manufactured by Mitsubishi Chemical Corporation, has a molecular weight of 9400, an unsaturated double bond content of 2 to 3, a hydroxyl value of 73 mg / KOH, and a maximum elongation at break of 80%.
- the resin for color difference adjustment (C10) is XRA-2109 manufactured by Mitsubishi Chemical Corporation.
- the molecular weight is 1350, the amount of unsaturated double bonds is 4 to 5, the hydroxyl value is 59 mg / KOH, and the maximum breaking elongation is less than 30%.
- the resin for color difference adjustment (C11) uses RA-3053 manufactured by Mitsubishi Chemical Corporation, has a molecular weight of 12000, an unsaturated double bond amount of 2, a hydroxyl value of 53 mg / KOH, and a maximum breaking elongation of 100%.
- the color difference adjusting resin (C12) the phenol novolac type epoxy acrylate obtained in Preparation Example 2 was used, and the maximum elongation at break was 80%.
- indium oxide and tin oxide are in a composition with a mass ratio of 95: 5 and a packing density of 98
- An amorphous ITO layer and a Cu layer were sequentially stacked by sputtering using a% indium oxide-tin oxide target and a 99.5% purity copper target.
- a heat treatment was performed at 130 ° C. for 90 minutes to crystallize the transparent conductive layer (ITO layer).
- the thickness of the formed ITO layer was about 20 nm, the thickness of the Cu layer was 300 nm, and the surface resistance value after the heat treatment was about 0.2 ⁇ / ⁇ .
- the test piece obtained as described above was subjected to an adhesion test according to JIS K5400. The test piece was cross-cut so that 100 1 mm 2 cuts (cross cuts) were made. Next, the cellophane adhesive tape was completely adhered on the created grid, and one end of the tape was lifted and peeled upward. This peeling operation was performed three times at the same location. Thereafter, the number of grids peeled off was determined according to the criteria described below.
- ⁇ R is 1 or less and ⁇ H is 0.3% or less. Thereby, even after performing the etching process, it can be confirmed that extremely excellent visibility is secured.
- the conductive laminate of the present invention was further free from interference fringes, was excellent in etching mark performance, and was excellent in adhesion.
- Comparative Examples G1 and G2 are examples in which the amounts of components (A) and (B) are outside the scope of the present invention. In these cases, ⁇ H exceeded 0.3%, and visibility was lowered. Comparative Example G3 is an example in which diacrylate having a bisphenol A skeleton is used instead of component (A). In Comparative Example G3, ⁇ R exceeded 1 and visibility was lowered. In addition, generation of interference fringes was confirmed. Comparative Example G4 is an example using acryloylmorpholine instead of component (B). In Comparative Example G4, ⁇ R exceeded 1 and visibility was lowered. In addition, generation of interference fringes was confirmed.
- Comparative examples G5 and G6 are examples in which zirconia oxide or titanium oxide, which is a high refractive index agent, is used instead of using components (A) and (B). In these comparative examples, ⁇ R greatly exceeded 1, and the visibility was greatly reduced. In addition, generation of interference fringes was confirmed. Comparative Examples G7 to G9 are examples using a bifunctional urethane acrylate for the purpose of imparting extensibility to the hard coat layer. In these comparative examples, even when the extensibility was improved by using a bifunctional urethane acrylate in the formation of the hard coat layer, ⁇ R exceeded 1, and good visibility could not be obtained.
- Comparative Example G10 is an example in which the total amount of particles contained in the color difference adjustment layer exceeds 200 parts by mass with respect to 100 parts by mass of the cured resin component. In this case, the adhesiveness was lowered.
- Comparative Examples G11 to G20 are examples in which the resin composition of the color difference adjusting layer is changed, and the molecular weight range, unsaturated double bond range, maximum elongation at break, and hydroxyl value range of the color difference adjusting layer are claimed. It deviates from the range described in Item 1, and in any case, good results could not be obtained with the adhesion when the auxiliary electrode layer was laminated.
- Example H1 The unsaturated double bond-containing acrylic copolymer (I) obtained in Production Example 4 was used as the first component for forming the high refractive index antiblocking layer .
- the component (A) of the second component the phenol novolac type epoxy acrylate (1) obtained in Production Example 1 is used, and as the component (B), ethoxylated orthophenylphenol acrylate (acrylate having 1 mol of ethoxy structure in the molecule,
- An anti-blocking layer forming composition was prepared using a viscosity of 130 mPa ⁇ s at 25 ° C. and a refractive index of 1.577) in the amounts shown in Table 1.
- the SP value of the second component was 12.2.
- the raw materials shown in Table 8 were sequentially mixed at the solid mass shown in Table 8 and stirred to obtain an anti-blocking layer forming composition.
- the SP value of the second component was calculated as a weight average with respect to the component (A), the component (B) SP value, and the content contained in the second component.
- the obtained anti-blocking layer-forming composition was dropped onto a Teijin Chemicals 100 ⁇ m optical PC film (Pure Ace) and coated using a bar coater # 9. After coating, it was dried at 70 ° C. for 1 minute, and irradiated with 350 mJ of ultraviolet light with an ultraviolet irradiator (manufactured by Fusion) to form a high refractive index antiblocking layer having a thickness of 3.0 ⁇ m on the polycarbonate film. .
- the viscosity of the ethoxylated orthophenylphenol acrylate of component (B) was measured using a B-type viscometer (TVB-22L manufactured by Toki Sangyo Co., Ltd.). 100 ml of the test sample was collected in a glass container, adjusted to a temperature of 20 ° C., and then measured using a M1Rotor at a rotation speed of 60 rpm. The refractive index of component (B) was measured according to JIS K0062.
- Formation of Color Difference Adjustment Layer A 15% titanium oxide dispersion having an average particle size of 40 nm is diluted to 5% with isobutyl alcohol, and a urethane acrylate (manufactured by Negami Kogyo Co., Ltd., UN-3320HS), which is a monomer having UV curing performance, is added to MIBK (methyl). What was diluted to 5% with isobutyl ketone) was prepared. 40 parts by mass of the diluted titanium oxide dispersion and 0.25 parts by mass of the photopolymerization initiator (Irgacure 184 manufactured by BASF) are mixed with 100 parts by mass of the urethane acrylate diluted liquid, and further IBA (isobutyl).
- amorphous ITO was formed by sputtering using an indium oxide-tin oxide target having a composition of indium oxide and tin oxide of 95: 5 and a filling density of 98%. A layer was formed. The thickness of the formed ITO layer was about 20 nm, and the surface resistance value after film formation was about 210 ⁇ / ⁇ . Subsequently, a heat treatment was performed at 130 ° C. for 90 minutes, and the transparent conductive layer (ITO layer) was crystallized to produce a transparent conductive laminate. The surface resistance value of the transparent conductive layer after the ITO layer was crystallized was about 150 ⁇ / ⁇ . The characteristics of the produced transparent conductive laminate are shown in Table 1.
- Examples H2 to H5 In the formation of the high-refractive index anti-blocking layer, the high-refractive index anti-blocking layer was formed in the same procedure as in Example H1, except that the composition of the anti-blocking layer forming composition was changed to that described in Table 8. did. Thereafter, in the formation of the color difference adjusting layer, the same procedure as in Example H1 was used except that the diluted liquid filling amount of the titanium oxide dispersion was changed to the amount shown in Table 8. A color difference adjusting layer was formed. Further, a transparent conductive layer was produced on the color difference adjusting layer in the same procedure as in Example H1. In Example H3, a transparent conductive laminate was produced using a 70 ⁇ m optical PC film (Pure Ace) C110 manufactured by Teijin Chemicals.
- Examples H6 to H10, H12, H14, H15 In the formation of the high refractive index antiblocking layer, the high refractive index antiblocking layer was formed in the same procedure as in Example H1. After that, in the formation of the color difference adjusting layer, the same procedure as in Example H1 was used except that the diluted liquid filling amount of the titanium oxide dispersion was changed to the amount shown in Table 8. A color difference adjusting layer was formed. Further, a transparent conductive layer was produced on the color difference adjusting layer in the same procedure as in Example H1. In Examples H7 and H8, a transparent conductive laminate was produced using a 188 ⁇ m optical PET film (Teijin Tetron KEFW) manufactured by Teijin DuPont.
- Teijin Tetron KEFW 188 ⁇ m optical PET film manufactured by Teijin DuPont.
- Example H9 a 125 ⁇ m optical PET film (Teijin Tetron KEFW) manufactured by Teijin DuPont was used to produce a transparent conductive laminate.
- a transparent conductive laminate was produced using a Teijin DuPont 50 ⁇ m optical PET film (Teijin Tetron KEL86W).
- Example H14 a transparent conductive laminate was prepared using a 75 ⁇ m optical modified PC film (Pure Ace WR W-142) manufactured by Teijin Chemicals.
- Example H15 a transparent conductive laminate was produced using a modified PC film for optical 50 ⁇ m (Pure Ace WR S-148) manufactured by Teijin Chemicals.
- Example H11 In the formation of the high refractive index antiblocking layer, the high refractive index antiblocking layer was formed in the same procedure as in Example H1. Thereafter, in the formation of the color difference adjusting layer, a 15% titanium oxide dispersion having an average particle size of 40 nm is diluted to 5% with isobutyl alcohol, and a urethane acrylate that is a monomer having ultraviolet curing performance (UN-3320HS, manufactured by Negami Kogyo Co., Ltd.). Was diluted to 5% with MIBK.
- a 15% titanium oxide dispersion having an average particle size of 40 nm is diluted to 5% with isobutyl alcohol, and a urethane acrylate that is a monomer having ultraviolet curing performance (UN-3320HS, manufactured by Negami Kogyo Co., Ltd.).
- the diluted titanium oxide dispersion and 0.25 parts by weight of the photopolymerization initiator (Irgacure 184 manufactured by BASF) are mixed with 100 parts by weight of the urethane acrylate diluted liquid, and further 2 by IBA.
- the solution diluted to 5% was applied using a bar coater # 3. After coating, the coating was dried at 70 ° C. for 1 minute, and irradiated with 350 mJ of ultraviolet light with a UV irradiation machine (manufactured by Fusion) in a nitrogen atmosphere, thereby forming the color difference adjusting layer 1 on the high refractive index antiblocking layer. .
- Example H13 In the formation of the color difference adjusting layer 2, 5 parts by mass of a photopolymerization initiator (Irgacure 184: manufactured by BASF) is mixed with 100 parts by mass of silicon acrylate (EB-1360: manufactured by Daicel Cytec), and methyl isobutyl ketone is used.
- a high refractive index anti-blocking layer, a color difference adjustment layer 1, a color difference adjustment layer 2, and a transparent layer are sequentially formed in the same procedure as in Example H11 except that the adjustment liquid diluted to 2.5% is used.
- a conductive layer was formed.
- Comparative examples H1 to H2 A transparent conductive laminate was produced in the same manner as in Example H1, except that a high-refractive index anti-blocking layer was produced using the anti-blocking layer forming composition obtained by the formulation shown in Table 9.
- Comparative Examples H3 to H9 A transparent conductive laminate was prepared in the same manner as in Example H9, except that a high refractive index antiblocking layer was prepared using the antiblocking layer forming composition obtained by the formulation shown in Table 9.
- Comparative Example H10 A transparent conductive laminate was produced in the same manner as in Example H9, except that in the formation of the color difference adjusting layer, the diluted liquid filling amount of the titanium oxide dispersion was changed to the amount shown in Table 2.
- I-184 1-hydroxycyclohexyl phenyl ketone, photopolymerization initiator bisphenol A EO modified diacrylate: manufactured by Toagosei Co., Ltd., Aronix M-211B, bisphenol A EO (2 mol) modified diacrylate, SP value 11.3
- Acryloylmorpholine SP value 11.9
- Bifunctional urethane acrylate NV100: CN-9893 (manufactured by Sartomer), SP value 11.1
- High refractive index filler 1 Zirconia ZRMIBK30WT% (zirconium oxide, manufactured by CIK Nanotech)
- High refractive index filler 2 Titania TiMIBK15WT% (titanium oxide, manufactured by CIK Nanotech) Indicates.
- the high refractive index antiblocking layer of the transparent conductive laminate of the example had good antiblocking performance. Furthermore, in any of the transparent conductive laminates of Examples, ⁇ R is 1 or less and ⁇ H is 0.3% or less. Thereby, even after performing the etching process, it can be confirmed that extremely excellent visibility is secured.
- the transparent conductive laminate of the present invention was further free from interference fringes, was excellent in etching mark performance, and was excellent in adhesion.
- Comparative Examples H1 and H2 are examples in which the amounts of components (A) and (B) are outside the scope of the present invention. In these cases, ⁇ H exceeded 0.3%, and visibility was lowered.
- Comparative Example H3 is an example in which diacrylate having a bisphenol A skeleton is used instead of component (A). In Comparative Example H3, ⁇ R exceeded 1 and visibility was deteriorated. In addition, generation of interference fringes was confirmed.
- Comparative Example H4 is an example using acryloylmorpholine instead of component (B). In Comparative Example H4, ⁇ R exceeded 1 and visibility was lowered. In addition, generation of interference fringes was confirmed.
- Comparative examples H5 and H6 are examples in which zirconia oxide or titanium oxide, which is a high refractive index agent, is used instead of using components (A) and (B). In these comparative examples, ⁇ R greatly exceeded 1, and the visibility was greatly reduced. In addition, generation of interference fringes was confirmed.
- Comparative Examples H7 to H9 are examples using bifunctional urethane acrylate for the purpose of imparting extensibility to the high refractive index antiblocking layer. In these comparative examples, even if the extensibility is improved by using a bifunctional urethane acrylate in the formation of the high refractive index antiblocking layer, ⁇ R exceeds 1, and good visibility cannot be obtained. It was. Comparative Example H10 is an example in which the total amount of particles contained in the color difference adjustment layer exceeds 200 parts by mass with respect to 100 parts by mass of the cured resin component. In this case, the adhesiveness was lowered.
- the transparent conductive laminate of the present invention is characterized by extremely high visibility.
- This transparent conductive laminate can be suitably used in a touch panel, particularly a capacitive touch panel.
- the conductive laminate of the present invention also has very good adhesion to the auxiliary electrode layer, it can be suitably used in a touch panel display having a narrow frame structure that has been widely applied in recent years.
- 1 transparent conductive laminate
- 3 Hard coat layer
- 5 Color difference adjustment layer
- 7 transparent conductive layer
- 10 transparent conductive laminate
- 11 A portion where the transparent conductive layer (7) has been removed by patterning by etching
- 13 A portion masked in the etching process.
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Abstract
Description
透明高分子基材の少なくとも一方の面上に、ハードコート層、色差調整層および透明導電層が順次積層された透明導電性積層体であり、
(1)ハードコート層が、
(A)2またはそれ以上のアクリレート基を有する、フェノールノボラック型アクリレート、および
(B)炭素数2または3のアルキレンオキシド構造を分子中に1~2mol有する、芳香族基含有モノまたはポリ(メタ)アクリレート化合物、
を含むハードコーティング組成物を塗装して硬化させることによって得られたハードコート層であって、
ハードコーティング組成物中に含まれる樹脂成分100質量部に対して、フェノールノボラック型アクリレート(A)は60~85質量部および(メタ)アクリレート(B)は15~30質量部含まれ、
(2)色差調整層は、
硬化樹脂成分(i)、そして
平均一次粒子径100nm以下である金属酸化物粒子(ii)および/または平均一次粒子径100nm以下である金属フッ化物粒子(iii)を含み、および、
色差調整層中における粒子(ii)および(iii)の総質量は、硬化樹脂成分(i)100質量部に対して0~200質量部であり、
(3)透明導電性積層体に対して波長500~750nmの範囲の光源を照射した場合における反射率(R1)、および、透明導電性積層体を、12N塩酸、16N硝酸および水を12N塩酸:16N硝酸:水=3.3:1.0:7.6の質量比で混合して得られた強酸水溶液中に40℃で3分間浸漬した後、乾燥させた後の透明導電性積層体に対して、波長500~750nmの範囲の光源を照射した場合における反射率(R2)において、R1およびR2の差△Rが1以下である、
透明導電性積層体、を提供するものであり、これにより上記課題が解決される。
透明導電性積層体のヘイズ値(H1)および、透明導電性積層体を、12N塩酸、16N硝酸および水を12N塩酸:16N硝酸:水=3.3:1.0:7.6の質量比で混合して得られた強酸水溶液中に40℃で3分間浸漬した後、乾燥させた後の透明導電性積層体のヘイズ値(H2)の差△Hが、0.3%以下であるのが好ましい。
で示される化合物であるのがより好ましい。
(C)2またはそれ以上の(メタ)アクリレート基を有する、フルオレン骨格含有(メタ)アクリレートを含むハードコーティング組成物を塗装して硬化させることによって得られたハードコート層であって、
ハードコーティング組成物中に含まれる樹脂成分100質量部に対して、フェノールノボラック型アクリレート(A)は40~70質量部、(メタ)アクリレート(B)は10~30質量部およびフルオレン骨格含有(メタ)アクリレート(C)は15~40質量部含まれる、ものが好ましい。
[式(II)中、R3はそれぞれ独立してHまたはCH3であり、
R4は、-A-OC(O)CR=CH2であって、Aはそれぞれ独立して、-OCH2CH2-、-OCH2CH2CH2-、-OCH(CH3)CH2-または-OCH2CH(CH3)-であり、Rはそれぞれ独立してHまたはCH3である。]
で示されるものが好ましい。
色差調整層の厚みが50nm以上200nm以下である、のが好ましい。
透明高分子基材の他の一方の面上に、アンチブロッキング層が形成されているのがより好ましい。
第1成分は不飽和二重結合含有アクリル共重合体を含み、第2成分は多官能アクリレートを含み、
第1成分のSP値(SP1)および第2成分のSP値(SP2)の差△SPが1~2の範囲内であり、
アンチブロッキング層形成組成物を塗装した後に、第1成分と第2成分が相分離を生じ、表面に微細な凹凸を有するアンチブロッキング層が形成される態様が好ましい。
透明高分子基材の少なくとも一方の面上に、高屈折率アンチブロッキング層、色差調整層および透明導電層が順次積層された透明導電性積層体であり、
(1)高屈折率アンチブロッキング層が、第1成分および第2成分を含むアンチブロッキング層形成組成物によって形成された層であって、
第1成分が、不飽和二重結合含有アクリル共重合体であり、
第2成分が、
(A)2またはそれ以上のアクリレート基を有する、フェノールノボラック型アクリレート、および
(B)炭素数2または3のアルキレンオキシド構造を分子中に1~2mol有する、芳香族基含有モノまたはポリ(メタ)アクリレート、
を含み、
第2成分100質量部に対して、フェノールノボラック型アクリレート(A)は60~85質量部および(メタ)アクリレート(B)は15~30質量部含まれており、
第1成分のSP値(SP1)および第2成分のSP値(SP2)の差△SPが1~4の範囲内であり、
組成物中に含まれる第1成分および第2成分の質量比は、第1成分:第2成分=0.5:99.5~20:80であり、
アンチブロッキング層形成組成物を塗装した後に、第1成分と第2成分が層分離を生じ、表面に微細な凹凸を有するアンチブロッキング層が形成され、
(2)色差調整層は、
硬化樹脂成分(i)、そして
平均一次粒子径100nm以下である金属酸化物粒子(ii)および/または平均一次粒子径100nm以下である金属フッ化物粒子(iii)を含み、および、色差調整層中における粒子(ii)および(iii)の総質量は、硬化樹脂成分(i)100質量部に対して0~200質量部であり、
(3)透明導電性積層体に対して波長500~750nmの範囲の光源を照射した場合における反射率(R1)、および、透明導電性積層体を、12N塩酸、16N硝酸および水を12N塩酸:16N硝酸:水=3.3:1.0:7.6の質量比で混合して得られた強酸水溶液中に40℃で3分間浸漬した後、乾燥させた後の透明導電性積層体に対して、波長500~750nmの範囲の光源を照射した場合における反射率(R2)において、R1およびR2の差△Rが1以下である、
透明導電性積層体、を提供するものであり、これにより上記課題が解決される。
透明導電性積層体のヘイズ値(H1)および、透明導電性積層体を、12N塩酸、16N硝酸および水を12N塩酸:16N硝酸:水=3.3:1.0:7.6の質量比で混合して得られた強酸水溶液中に40℃で3分間浸漬した後、乾燥させた後の透明導電性積層体のヘイズ値(H2)の差△Hが、0.3%以下であるのが好ましい。
で示される化合物であるのが好ましい。
透明高分子基材の他の一方の面上に、アンチブロッキング層が形成された態様も好ましい。
第1成分は不飽和二重結合含有アクリル共重合体を含み、第2成分は多官能アクリレートを含み、
第1成分のSP値(SP1)および第2成分のSP値(SP2)の差△SPが1~2の範囲内であり、
アンチブロッキング層形成組成物を塗装した後に、第1成分と第2成分が相分離を生じ、表面に微細な凹凸を有するアンチブロッキング層が形成されるのが好ましい。
本発明の透明導電性積層体に用いる透明高分子基材としては、例えばポリカーボネート系フィルム、ポリエチレンテレフタレート、ポリエチレンナフタレート等のポリエステル系フィルム;ジアセチルセルロース、トリアセチルセルロース等のセルロース系フィルム;ポリメチルメタクリレート等のアクリル系フィルムのような、透明ポリマーからなる基板があげられる。また、本発明の透明導電性積層体に用いる透明高分子基材としては、ポリスチレン、アクリロニトリル・スチレン共重合体等のスチレン系フィルム;ポリ塩化ビニル、ポリエチレン、ポリプロピレン、環状ないしノルボルネン構造を有するポリオレフィン、エチレン・プロピレン共重合体等のオレフィン系フィルム;ナイロン、芳香族ポリアミド等のアミド系フィルムのような、透明ポリマーからなる基板もあげられる。
またさらに、本発明の透明導電性積層体に用いる透明高分子基材としては、ポリイミド、ポリスルホン、ポリエーテルスルホン、ポリエーテルエーテルケトン、ポリフェニレンスルフィド、ポリビニルアルコール、ポリ塩化ビニリデン、ポリビニルブチラール、ポリアリレート、ポリオキシメチレン、エポキシ樹脂、および上記ポリマーのブレンド物のような、透明ポリマーからなる基板なども挙げられる。これらの透明ポリマーの中でも、透明性や耐熱性、汎用性などの観点からポリカーボネートやポリエチレンテレフタレートが特に好ましい。
本発明の透明導電性積層体が有するハードコート層は、
(A)2またはそれ以上のアクリレート基を有する、フェノールノボラック型アクリレート、および
(B)炭素数2または3のアルキレンオキシド構造を分子中に1~2mol有する、モノまたはポリ(メタ)アクリレート化合物、
必要に応じて、(C)2またはそれ以上の(メタ)アクリレート基を有する、フルオレン骨格含有(メタ)アクリレート、
を含むハードコーティング組成物を塗装して硬化させることによって得られたハードコート層である。ここで、成分(A)および(B)の2成分の時は、上記ハードコーティング組成物中に含まれる樹脂成分100質量部に対して、フェノールノボラック型アクリレート(A)は60~85質量部および(メタ)アクリレート(B)は15~30質量部含まれることを条件とする。成分(A)、(B)および(C)の3成分の時は、上記ハードコーティング組成物中に含まれる樹脂成分100質量部に対して、フェノールノボラック型アクリレート(A)は40~70質量部、(メタ)アクリレート(B)は10~30質量部およびフルオレン骨格含有(メタ)アクリレート(C)は15~40質量部含まれることを条件とする。
上記ハードコーティング組成物は、(A)2またはそれ以上のアクリレート基を有する、フェノールノボラック型アクリレートを含む。ハードコーティング組成物がフェノールノボラック型アクリレート(A)を含むことによって、得られるハードコート層が、透明であり、かつ、高い硬度を有する高屈折率層となる。これにより、干渉縞の発生を効果的に防ぐことができる。
で示される、フェノールノボラック型アクリレートであるのが好ましい。上記式(I)中、nは2~4でありmは0~3であるであるのがより好ましく、nは2~4でありmは0~1であるのがさらに好ましい。
上記ハードコーティング組成物は、(B)炭素数2または3のアルキレンオキシド構造を分子中に1~2mol有する、芳香族基含有モノまたはポリ(メタ)アクリレートを含む。この(メタ)アクリレート(B)は、粘度300mPa・s未満であり、かつ屈折率が1.56~1.64の範囲内であるのが好ましい。
上記ハードコーティング組成物の1態様として、上記成分(A)および(B)に加えて、2またはそれ以上の(メタ)アクリレート基を有する、フルオレン骨格含有(メタ)アクリレート(C)をさらに含む態様が挙げられる。フルオレン骨格含有(メタ)アクリレート(C)は高屈折率を有するため、得られるハードコート層の屈折率を高く設定することができるという利点がある。
R4は、-A-OC(O)CR=CH2であって、Aはそれぞれ独立して、-OCH2CH2-、-OCH2CH2CH2-、-OCH(CH3)CH2-または-OCH2CH(CH3)-であり、Rはそれぞれ独立してHまたはCH3である。]
で示される、アクリレートモノマーが挙げられる。
[上記式(II)-1中、各Rは水素原子またはメチル基を示し、mおよびnは、それぞれ独立して、1~5の整数を示す。]
上記ハードコーティング組成物は、上記成分(A)および(B)、および必要に応じて成分(C)に加えて、他の(メタ)アクリレート類を含んでもよい。このような(メタ)アクリレート類として、例えば、多官能(メタ)アクリレートモノマーおよび/またはオリゴマー化合物が挙げられる。これらの多官能(メタ)アクリレートモノマーおよび/またはオリゴマー化合物は、ハードコーティング組成物を塗装した後の活性エネルギー線の照射により、(メタ)アクリロイル基の反応に基づく硬化反応が生じ、高硬度を有するハードコート層が得られるという利点がある。
上記ハードコーティング組成物は光重合開始剤を含むのが好ましい。光重合開始剤が存在することによって、紫外線などの活性エネルギー線照射により樹脂成分が良好に重合することとなる。光重合開始剤の例として、例えば、アルキルフェノン系光重合開始剤、アシルフォスフィンオキサイド系光重合開始剤、チタノセン系光重合開始剤、オキシムエステル系重合開始剤などが挙げられる。アルキルフェノン系光重合開始剤として、例えば2,2-ジメトキシ-1,2-ジフェニルエタン-1-オン、1-ヒドロキシ-シクロヘキシル-フェニル-ケトン、2-ヒドロキシ-2-メチル-1-フェニル-プロパン-1-オン、1-[4-(2-ヒドロキシエトキシ)-フェニル]-2-ヒドロキシ-2-メチル-1-プロパン-1-オン、2-ヒロドキシ-1-{4-[4-(2-ヒドロキシ-2-メチル-プロピオニル)-ベンジル]フェニル}-2-メチル-プロパン-1-オン、2-メチル-1-(4-メチルチオフェニル)-2-モルフォリノプロパン-1-オン、2-ベンジル-2-ジメチルアミノ-1-(4-モルフォリノフェニル)-ブタノン-1、2-(ジメチルアミノ)-2-[(4-メチルフェニル)メチル]-1-[4-(4-モルホリニル)フェニル]-1-ブタノンなどが挙げられる。アシルフォスフィンオキサイド系光重合開始剤として、例えば2,4,6-トリメチルベンゾイル-ジフェニル-フォスフィンオキサイド、ビス(2,4,6-トリメチルベンゾイル)-フェニルフォスフィンオキサイドなどが挙げられる。チタノセン系光重合開始剤として、例えば、ビス(η5-2,4-シクロペンタジエン-1-イル)-ビス(2,6-ジフルオロ-3-(1H-ピロール-1-イル)-フェニル)チタニウムなどが挙げられる。オキシムエステル系重合開始剤として、例えば、1.2-オクタンジオン,1-[4-(フェニルチオ)-,2-(O-ベンゾイルオキシム)]、エタノン,1-[9-エチル-6-(2-メチルベンゾイル)-9H-カルバゾール-3-イル]-,1-(0-アセチルオキシム)、オキシフェニル酢酸、2-[2-オキソ-2-フェニルアセトキシエトキシ]エチルエステル、2-(2-ヒドロキシエトキシ)エチルエステルなどが挙げられる。これらの光重合開始剤は、1種を単独で用いてもよく、また2種以上を併用してもよい。
本発明の透明導電性積層体は、ハードコート層の上に色差調整層が存在する。つまり、色差調整層は、ハードコート層と透明導電層の間に存在する層である。この色差調整層は、1層であってもよく、2層またはそれ以上からなる層であってもよい。色差調整層は、層間の密着性および透明導電性積層体の光学特性(透過率および色調など)を改良する層である。
本発明において、この色差調整層は、
硬化樹脂成分(i)、そして
平均一次粒子径100nm以下である金属酸化物粒子(ii)および/または平均一次粒子径100nm以下である金属フッ化物粒子(iii)
を含む層である。ここで、色差調整層中における粒子(ii)および(iii)の総質量は、硬化樹脂成分(i)100質量部に対して0~200質量部の範囲内であることを条件とする。
紫外線硬化型樹脂は、紫外線硬化性能を有するモノマーを含む組成物によって得ることができる。紫外線硬化性能を有するモノマーとしては、例えば、ポリオールアクリレート、ポリエステルアクリレート、ウレタンアクリレート、エポキシアクリレート、変性スチレンアクリレート、メラミンアクリレート、シリコン含有アクリレートなどの単官能および多官能アクリレートが挙げられる。
具体的なモノマーとしては、例えばトリメチロールプロパントリメタクリレート、トリメチロールプロパンエチレンオキサイド変性アクリレート、トリメチロールプロパンプロピレンオキサイド変性アクリレート、イソシアヌール酸アルキレンオキサイド変性アクリレート、ペンタエリスリトールトリアクリレート、ジペンタエリスリトールヘキサアクリレート、ジメチロールトリシクロデカンジアクリレート、トリプロピレングリコールトリアクリレート、ジエチレングリコールジアクリレート、1,6-ヘキサンジオールジアクリレート、エポキシ変性アクリレート、ウレタン(メタ)アクリレートなどのウレタン変性アクリレート、エポキシ変性アクリレートなどの多官能モノマーが挙げられる。これらのモノマーは単独で用いてもよく、2種以上を併用してもよい。
これらの紫外線硬化性能を有するモノマーの中でも、ウレタン変性アクリレートが好ましい。ウレタン変性アクリレートは市販品を使用することができ、例えば、日本合成化学工業(株)製の紫光シリーズ、例えば、UV1700B、UV6300B、UV765B、UV7640B、UV7600Bなど;根上工業(株)製のアートレジンシリーズ、例えば、アートレジンHDP、アートレジンUN9000H、アートレジンUN3320HA、アートレジンUN3320HB、アートレジンUN3320HC、アートレジンUN3320HS、アートレジンUN901M、アートレジンUN902MS、アートレジンUN903など;新中村化学工業(株)製のUA100H、U4H、U6H、U15HA、UA32P、U6LPA、U324A、U9HAMIなど;ダイセル・ユーシービー(株)製のEbecrylシリーズ、例えば、1290、5129、254、264、265、1259、1264、 4866、9260、8210、204、205、6602、220、4450など;荒川化学工業(株)製のビームセットシリーズ、例えば、371、371MLV、371S、577、577BV、577AKなど;三菱レイヨン(株)製のRQシリーズなど;DIC(株)製のユニディックシリーズなど;DPHA40H(日本化薬(株)製)、CN9006、CN968(SARTOMER社製)などを用いることができる。
上記色差調整層の硬化性樹脂は、2またはそれ以上のアクリレート基を有する分子量1400~1800であり、水酸基価が60~80mgであるのが好ましい。
色差調整層を形成する組成物はさらに、光増感剤を含んでもよい。光増感剤として、例えば、トリエチルアミン、トリ-n-ブチルホスフィンなどの一般的に用いられる光増感剤を用いることができる。
色差調整層を形成する組成物はさらに、各種アルコキシシランの加水分解物を含んでもよい。
色差調整層中における粒子(ii)および(iii)の総質量が200質量部を超える場合は、層間密着性が劣る不具合がある。
色差調整層が2層である場合の一例として、まず、金属酸化物粒子(ii)を含む組成物をハードコート層上に塗装して硬化させた後、金属フッ化物粒子(iii)を含む組成物を塗装して硬化させることによって、2層からなる色差調整層を形成することができる。
色差調整層が2層である場合の他の一例として、まず、金属フッ化物粒子(iii)を含む組成物を塗装して硬化させた後、金属酸化物粒子(ii)を含む組成物をハードコート層上に塗装して硬化させることによって、2層からなる色差調整層を形成することができる。
本発明の透明導電性積層体は、必要に応じて、色差調整層および透明導電層の間に、金属酸化物層が形成されていてもよい。金属酸化物層を構成する成分としては、例えば、酸化ケイ素、酸化アルミニウム、酸化チタン、酸化マグネシウム、酸化亜鉛、酸化インジウム、酸化錫などの金属酸化物が挙げられる。この金属酸化物層として、例えば、厚さ0.5~5.0nmである層が挙げられる。
本発明の透明導電性積層体は、色差調整層または金属酸化物層の上に、透明導電層が形成されている。透明導電層の構成材料としては、特に制限は無いが、例えば、金属層、または金属化合物層を挙げることができる。透明導電層を構成する成分としては、例えば酸化ケイ素、酸化アルミニウム、酸化チタン、酸化マグネシウム、酸化亜鉛、酸化インジウム、酸化錫等の金属酸化物の層が挙げられる。これらのうち酸化インジウムを主成分とした結晶質の層であることが好ましく、特に結晶質のITO(Indium Tin Oxide)からなる層が好ましく用いられる。
また、透明導電層が結晶質ITOの場合、結晶粒径は、特に上限を設ける必要はないが500nm以下であることが好ましい。結晶粒径が500nmを超えると屈曲耐久性が悪くなるため好ましくない。ここで結晶粒径とは、透過型電子顕微鏡(TEM)下で観察される多角形状または長円状の各領域における対角線または直径の中で最大のものと定義される。透明導電層が非晶質ITOの場合には、環境信頼性が低下することがある。
上記強酸水溶液は、エッチング処理において一般的に用いられる、いわゆる王水と言われる強酸水溶液である。上記強酸水溶液を用いてエッチング処理を行うことによって、透明導電層はエッチングされることとなる。図1は、エッチング処理された透明導電性積層体を示す概略説明図である。透明導電性積層体(10)は、透明高分子基材(1)の一方の面上に、ハードコート層(3)、色差調整層(5)および透明導電層(7)が順次積層された構造を有する。ここで、(11)で示される部分が、エッチング処理によるパターニングによって、透明導電層(7)が取り除かれた部分であり、そして(13)で示される部分が、エッチング処理においてマスクされていた部分であり、透明導電層がそのまま残された部分である。ここで、上記反射率R1は、図1中の(13)の部分における反射率を意味し、そして上記反射率R2は、図1中の(11)の部分における反射率を意味する。そして本発明の透明導電性積層体においては、波長500~750nmの範囲の光源を照射した場合における反射率において、R1およびR2の差△Rが1以下であることを特徴とする。つまり、本発明の透明導電性積層体においては、透明導電層(7)が存在する部分および存在しない部分において、反射率の差がほとんど生じていない。これにより、極めて高い視認性が達成されることとなった。
本発明の透明導電性積層体は、透明高分子基材の一方の面上に、ハードコート層、色差調整層および透明導電層が順に積層された構造を有する。この透明導電性積層体は、必要に応じて、透明高分子基材の他の一方の面上に、アンチブロッキング層が形成されていてもよい。他の一方の面上にアンチブロッキング層を形成することによって、透明導電性積層体の製造工程におけるブロッキング現象の発生を抑えることができ、製造時における保存安定性が向上するという利点がある。
サンプル:樹脂0.5gを100mlビーカーに秤量し、良溶媒10mlをホールピペットを用いて加え、マグネティックスターラーにより溶解する。
溶媒:
良溶媒…ジオキサン、アセトンなど
貧溶媒…n-ヘキサン、イオン交換水など
濁点測定:50mlビュレットを用いて貧溶媒を滴下し、濁りが生じた点を滴下量とする。
φi:濁点における各溶媒の体積分率
δi:溶媒のSP値
ml:低SP貧溶媒混合系
mh:高SP貧溶媒混合系
本発明のタッチパネルは、上記透明導電性積層体を有する。本発明のタッチパネルとして、例えば、静電容量方式のタッチパネルが挙げられる。また、本発明の透明導電性積層体を、抵抗膜方式のタッチパネルに用いてもよい。
透明導電層/色差調整層/ハードコート層/透明高分子基材、
透明導電層/金属酸化物層/色差調整層/ハードコート層/透明高分子基材、
透明導電層/色差調整層/ハードコート層/透明高分子基材/アンチブロッキング層、
透明導電層/金属酸化物層/色差調整層/ハードコート層/透明高分子基材/アンチブロッキング層、
透明導電層/色差調整層/ハードコート層/透明高分子基材/ハードコート層/色差調整層/透明導電層、
透明導電層/金属酸化物層/色差調整層/ハードコート層/透明高分子基材/ハードコート層/色差調整層/金属酸化物層/透明導電層、
補助電極層/透明導電層/色差調整層/ハードコート層/透明高分子基材、
補助電極層/透明導電層/金属酸化物層/色差調整層/ハードコート層/透明高分子基材、
補助電極層/透明導電層/色差調整層/ハードコート層/透明高分子基材/アンチブロッキング層、補助電極層/透明導電層/金属酸化物層/色差調整層/ハードコート層/透明高分子基材/アンチブロッキング層、
補助電極層/透明導電層/色差調整層/ハードコート層/透明高分子基材/ハードコート層/色差調整層/透明導電層/補助電極層、
補助電極層/透明導電層/金属酸化物層/色差調整層/ハードコート層/透明高分子基材/ハードコート層/色差調整層/金属酸化物層/透明導電層/補助電極層。
##
本発明はまた、透明高分子基材の少なくとも一方の面上に、高屈折率アンチブロッキング層、色差調整層および透明導電層がこの順で積層された、透明導電性積層体も提供する。本発明の透明導電性積層体を構成する各層について説明する。
本発明の透明導電性積層体に用いる透明高分子基材は、前に述べた透明高分子基材と同じである。
本発明の透明導電性積層体が有する高屈折率アンチブロッキング層は、特定の高屈折率アンチブロッキング層形成組成物によって得られる層である。この高屈折率アンチブロッキング層形成組成物は、第1成分および第2成分を含む。上記第1成分は、不飽和二重結合含有アクリル共重合体である。上記第2成分は、(A)2またはそれ以上のアクリレート基を有する、フェノールノボラック型アクリレート、および(B)炭素数2または3のアルキレンオキシド構造を分子中に1~2mol有する、芳香族基含有モノまたはポリ(メタ)アクリレート、を含む。そして、第2成分100質量部に対して、フェノールノボラック型アクリレート(A)は60~85質量部および(メタ)アクリレート(B)は15~30質量部含まれることを条件とする。さらに、上記第1成分のSP値(SP1)および第2成分のSP値(SP2)の差△SPが1~4の範囲内であり、組成物中に含まれる第1成分および第2成分の質量比は、第1成分:第2成分=0.5:99.5~20:80であることを条件とする。この高屈折率アンチブロッキング層形成組成物は、塗装した後に、第1成分および第2成分が層分離を生じ、表面に微細な凹凸を有するアンチブロッキング層が形成されることを特徴とする。
第1成分として、不飽和二重結合含有アクリル共重合体が用いられる。不飽和二重結合含有アクリル共重合体は、例えば(メタ)アクリルモノマーと他のエチレン性不飽和二重結合を有するモノマーとを共重合した樹脂、(メタ)アクリルモノマーと他のエチレン性不飽和二重結合およびエポキシ基を有するモノマーとを反応させた樹脂、(メタ)アクリルモノマーと他のエチレン性不飽和二重結合およびイソシアネート基を有するモノマーとを反応させた樹脂などにアクリル酸やグリシジルアクリレートなどの不飽和二重結合を有しかつ他の官能基を有する成分を付加させたものなどが挙げられる。これらの不飽和二重結合含有アクリル共重合体は1種を単独で用いてもよく、また2種以上を混合して用いてもよい。この不飽和二重結合含有アクリル共重合体は、重量平均分子量で2000~100000であるのが好ましく、5000~50000であるのがより好ましい。
第2成分は、
(A)2またはそれ以上のアクリレート基を有する、フェノールノボラック型アクリレート、および
(B)炭素数2または3のアルキレンオキシド構造を分子中に1~2mol有する、芳香族基含有モノまたはポリ(メタ)アクリレート、
を含む。以下、各成分(A)および(B)について詳述する。
上記第2成分の成分(A)は、ハードコート層で説明したフェノールノボラック型アクリレート(A)と同じである。
この成分(B)は、ハードコート層で説明した芳香族基含有モノまたはポリ(メタ)アクリレートと同じである。
本発明の高屈折率アンチブロッキング層形成組成物における第2成分は、上記成分(A)および(B)に加えて、他の(メタ)アクリレート類を含んでもよい。このような(メタ)アクリレート類はハードコート層で説明したものと同じである。
上記高屈折率アンチブロッキング層形成組成物は、第1成分および第2成分、そして必要に応じた溶媒、光重合開始剤、触媒、光増感剤などの添加剤を混合することにより調製される。本発明の高屈折率アンチブロッキング層形成組成物中における第1成分と第2成分との比率は、第1成分:第2成分=0.5:99.5~20:80である。この比率は、第1成分:第2成分=1:99~20:80がより好ましく、1:99~15:85であるのがさらに好ましい。
サンプル:樹脂0.5gを100mlビーカーに秤量し、良溶媒10mlをホールピペットを用いて加え、マグネティックスターラーにより溶解する。
溶媒:
良溶媒…ジオキサン、アセトンなど
貧溶媒…n-ヘキサン、イオン交換水など
濁点測定:50mlビュレットを用いて貧溶媒を滴下し、濁りが生じた点を滴下量とする。
φi:濁点における各溶媒の体積分率
δi:溶媒のSP値
ml:低SP貧溶媒混合系
mh:高SP貧溶媒混合系
本発明の透明導電性積層体は、高屈折率アンチブロッキング層の上に色差調整層が存在する。つまり、色差調整層は、高屈折率アンチブロッキング層と透明導電層の間に存在する層である。この色差調整層は、1層であってもよく、2層またはそれ以上からなる層であってもよい。色差調整層は、層間の密着性および透明導電性積層体の光学特性(透過率および色調など)を改良する層である。
本発明において、この色差調整層は、
硬化樹脂成分(i)、そして
平均一次粒子径100nm以下である金属酸化物粒子(ii)および/または平均一次粒子径100nm以下である金属フッ化物粒子(iii)
を含む層である。ここで、色差調整層中における粒子(ii)および(iii)の総質量は、硬化樹脂成分(i)100質量部に対して0~200質量部の範囲内であることを条件とする。
紫外線硬化型樹脂は、紫外線硬化性能を有するモノマーを含む組成物によって得ることができる。紫外線硬化性能を有するモノマーとしては、例えば、ポリオールアクリレート、ポリエステルアクリレート、ウレタンアクリレート、エポキシアクリレート、変性スチレンアクリレート、メラミンアクリレート、シリコン含有アクリレートなどの単官能および多官能アクリレートが挙げられる。
具体的なモノマーとしては、例えばトリメチロールプロパントリメタクリレート、トリメチロールプロパンエチレンオキサイド変性アクリレート、トリメチロールプロパンプロピレンオキサイド変性アクリレート、イソシアヌール酸アルキレンオキサイド変性アクリレート、ペンタエリスリトールトリアクリレート、ジペンタエリスリトールヘキサアクリレート、ジメチロールトリシクロデカンジアクリレート、トリプロピレングリコールトリアクリレート、ジエチレングリコールジアクリレート、1,6-ヘキサンジオールジアクリレート、エポキシ変性アクリレート、ウレタン(メタ)アクリレートなどのウレタン変性アクリレート、エポキシ変性アクリレートなどの多官能モノマーが挙げられる。これらのモノマーは単独で用いてもよく、2種以上を併用してもよい。
これらの紫外線硬化性能を有するモノマーの中でも、ウレタン変性アクリレートが好ましい。ウレタン変性アクリレートは市販品を使用することができ、例えば、日本合成化学工業(株)製の紫光シリーズ、例えば、UV1700B、UV6300B、UV765B、UV7640B、UV7600Bなど;根上工業(株)製のアートレジンシリーズ、例えば、アートレジンHDP、アートレジンUN9000H、アートレジンUN3320HA、アートレジンUN3320HB、アートレジンUN3320HC、アートレジンUN3320HS、アートレジンUN901M、アートレジンUN902MS、アートレジンUN903など;新中村化学工業(株)製のUA100H、U4H、U6H、U15HA、UA32P、U6LPA、U324A、U9HAMIなど;ダイセル・ユーシービー(株)製のEbecrylシリーズ、例えば、1290、5129、254、264、265、1259、1264、 4866、9260、8210、204、205、6602、220、4450など;荒川化学工業(株)製のビームセットシリーズ、例えば、371、371MLV、371S、577、577BV、577AKなど;三菱レイヨン(株)製のRQシリーズなど;DIC(株)製のユニディックシリーズなど;DPHA40H(日本化薬(株)製)、CN9006、CN968(SARTOMER社製)などを用いることができる。
色差調整層を形成する組成物はさらに、光増感剤を含んでもよい。光増感剤として、例えば、トリエチルアミン、トリ-n-ブチルホスフィンなどの一般的に用いられる光増感剤を用いることができる。
色差調整層を形成する組成物はさらに、各種アルコキシシランの加水分解物を含んでもよい。
色差調整層中における粒子(ii)および(iii)の総質量が200質量部を超える場合は、層間密着性が劣る不具合がある。
色差調整層が2層である場合の一例として、まず、金属酸化物粒子(ii)を含む組成物を高屈折率アンチブロッキング層上に塗装して硬化させた後、金属フッ化物粒子(iii)を含む組成物を塗装して硬化させることによって、2層からなる色差調整層を形成することができる。
色差調整層が2層である場合の他の一例として、まず、金属フッ化物粒子(iii)を含む組成物を塗装して硬化させた後、金属酸化物粒子(ii)を含む組成物を高屈折率アンチブロッキング層上に塗装して硬化させることによって、2層からなる色差調整層を形成することができる。
本発明の透明導電性積層体は、必要に応じて、色差調整層および透明導電層の間に、金属酸化物層が形成されていてもよい。金属酸化物層を構成する成分としては、例えば、酸化ケイ素、酸化アルミニウム、酸化チタン、酸化マグネシウム、酸化亜鉛、酸化インジウム、酸化錫などの金属酸化物が挙げられる。この金属酸化物層として、例えば、厚さ0.5~5.0nmである層が挙げられる。
本発明の透明導電性積層体は、色差調整層または金属酸化物層の上に、透明導電層が形成されている。透明導電層の構成材料としては、特に制限は無いが、例えば、金属層、又は金属化合物層を挙げることができる。透明導電層を構成する成分としては、例えば酸化ケイ素、酸化アルミニウム、酸化チタン、酸化マグネシウム、酸化亜鉛、酸化インジウム、酸化錫等の金属酸化物の層が挙げられる。これらのうち酸化インジウムを主成分とした結晶質の層であることが好ましく、特に結晶質のITO(Indium Tin Oxide)からなる層が好ましく用いられる。
また、透明導電層が結晶質ITOの場合、結晶粒径は、特に上限を設ける必要はないが500nm以下であることが好ましい。結晶粒径が500nmを超えると屈曲耐久性が悪くなるため好ましくない。ここで結晶粒径とは、透過型電子顕微鏡(TEM)下で観察される多角形状又は長円状の各領域における対角線又は直径の中で最大のものと定義される。透明導電層が非晶質ITOの場合には、環境信頼性が低下することがある。
上記強酸水溶液は、エッチング処理において一般的に用いられる、いわゆる王水と言われる強酸水溶液である。上記強酸水溶液を用いてエッチング処理を行うことによって、透明導電層はエッチングされることとなる。図1は、エッチング処理された透明導電性積層体を示す概略説明図である。透明導電性積層体(10)は、透明高分子基材(1)の一方の面上に、高屈折率アンチブロッキング層(3)、色差調整層(5)および透明導電層(7)が順次積層された構造を有する。ここで、(11)で示される部分が、エッチング処理によるパターニングによって、透明導電層(7)が取り除かれた部分であり、そして(13)で示される部分が、エッチング処理においてマスクされていた部分であり、透明導電層がそのまま残された部分である。ここで、上記反射率R1は、図1中の(13)の部分における反射率を意味し、そして上記反射率R2は、図1中の(11)の部分における反射率を意味する。そして本発明の透明導電性積層体においては、波長500~750nmの範囲の光源を照射した場合における反射率において、R1およびR2の差△Rが1以下であることを特徴とする。つまり、本発明の透明導電性積層体においては、透明導電層(7)が存在する部分および存在しない部分において、反射率の差がほとんど生じていない。これにより、極めて高い視認性が達成されることとなった。
本発明の透明導電性積層体は、透明高分子基材の一方の面上に、高屈折率アンチブロッキング層、色差調整層および透明導電層が順に積層された構造を有する。この透明導電性積層体は、必要に応じて、透明高分子基材の他の一方の面上に、アンチブロッキング層が形成されていてもよい。他の一方の面上にアンチブロッキング層を形成することによって、透明導電性積層体の製造工程におけるブロッキング現象の発生を抑えることができ、製造時における保存安定性が向上するという利点がある。
本発明のタッチパネルは、上記透明導電性積層体を有する。本発明のタッチパネルとして、例えば、静電容量方式のタッチパネルが挙げられる。また、本発明の透明導電性積層体を、抵抗膜方式のタッチパネルに用いてもよい。
透明導電層/色差調整層/高屈折率アンチブロッキング層/透明高分子基材、
透明導電層/金属酸化物層/色差調整層/高屈折率アンチブロッキング層/透明高分子基材、
透明導電層/色差調整層/高屈折率アンチブロッキング層/透明高分子基材/アンチブロッキング層、
透明導電層/金属酸化物層/色差調整層/高屈折率アンチブロッキング層/透明高分子基材/アンチブロッキング層、
透明導電層/色差調整層/高屈折率アンチブロッキング層/透明高分子基材/高屈折率アンチブロッキング層/色差調整層/透明導電層、
透明導電層/金属酸化物層/色差調整層/高屈折率アンチブロッキング層/透明高分子基材/高屈折率アンチブロッキング層/色差調整層/金属酸化物層/透明導電層、
補助電極層/透明導電層/色差調整層/高屈折率アンチブロッキング層/透明高分子基材、
補助電極層/透明導電層/金属酸化物層/色差調整層/高屈折率アンチブロッキング層/透明高分子基材、
補助電極層/透明導電層/色差調整層/高屈折率アンチブロッキング層/透明高分子基材/アンチブロッキング層、補助電極層/透明導電層/金属酸化物層/色差調整層/高屈折率アンチブロッキング層/透明高分子基材/アンチブロッキング層、
補助電極層/透明導電層/色差調整層/高屈折率アンチブロッキング層/透明高分子基材/高屈折率アンチブロッキング層/色差調整層/透明導電層/補助電極層、
補助電極層/透明導電層/金属酸化物層/色差調整層/高屈折率アンチブロッキング層/透明高分子基材/高屈折率アンチブロッキング層/色差調整層/金属酸化物層/透明導電層/補助電極層。
攪拌装置、温度計、滴下漏斗および還流装置のついた反応装置に、フェノールノボラック樹脂(重量平均分子量700~900、エポキシ当量150~200)150gおよびエピクロルヒドリン550gを混合し、100℃、100~200mgの減圧条件下にて48.5%の水酸化ナトリウム水溶液110gを2時間かけて滴下した。反応終了後、温度を室温まで冷却し過剰の水酸化ナトリウム水溶液を酸で中和、減圧下にて加熱し過剰のエピクロルヒドリンを除去した後、生成物をメチルイソブチルケトンに溶解させ、水洗濾別により副生成塩を除去してフェノールノボラック型のエポキシ樹脂溶液を得た。
得られたフェノールノボラック型のエポキシ樹脂の固形分100質量部に対し、メトキノン1000ppm、トリフェニルホスフィン2000ppmを加え、100℃にてアクリル酸を滴下し、酸価が1mgKOH/g以下になるまで反応させフェノールノボラック型エポキシアクリレート(1)を得た。
得られたフェノールノボラック型エポキシアクリレート(1)は、重量平均分子量が950であり、水酸基価は140mgKOH/g、屈折率は1.572であった。
攪拌装置、温度計、滴下漏斗および還流装置のついた反応装置に、フェノールノボラック樹脂(重量平均分子量900~1100、エポキシ当量150~200)150gおよびエピクロルヒドリン550gを混合し、100℃、100~200mgの減圧条件下にて48.5%の水酸化ナトリウム水溶液110gを2時間かけて滴下した。反応終了後、温度を室温まで冷却し過剰の水酸化ナトリウム水溶液を酸で中和、減圧下にて加熱し過剰のエピクロルヒドリンを除去した後、生成物をメチルイソブチルケトンに溶解させ、水洗濾別により副生成塩を除去してフェノールノボラック型のエポキシ樹脂溶液を得た。
得られたフェノールノボラック型のエポキシ樹脂の固形分100質量部に対し、メトキノン1000ppm、トリフェニルホスフィン2000ppmを加え、100℃にてアクリル酸を滴下し、酸価が1mgKOH/g以下になるまで反応させフェノールノボラック型エポキシアクリレート(2)を得た。
得られたフェノールノボラック型エポキシアクリレート(2)は、重量平均分子量が1200であり、水酸基価は137mgKOH/g、屈折率は1.571であった。
イソボロニルメタクリレート187.2g、メチルメタクリレート2.8g、メタクリル酸10.0gからなる混合物を混合した。この混合物を、攪拌羽根、窒素導入管、冷却管および滴下漏斗を備えた1000ml反応容器中の、窒素雰囲気下で110℃に加温したプロピレングリコールモノメチルエーテル360gにターシャリーブチルペルオキシ-2-エチルヘキサエート2.0gを含むプロピレングリコールモノメチルエーテルの80.0g溶液と同時に3時間かけて等速滴下し、その後、1時間、110℃で反応させた。
第一成分として、製造例3にて得られた不飽和二重結合含有アクリル共重合体(I)を10g、第二成分としてジペンタエリスリトールヘキサアクリレート(SP値:12.1)を100g、反応性光重合開始剤としてイルガキュア184を5g順次混合し、イソブチルアルコール245gを加え溶解させ、相分離型のアンチブロッキング層形成組成物を得た。
ハードコート層の形成
成分(A)として、製造例1で得られたフェノールノボラック型エポキシアクリレート(1)を、成分(B)として、エトキシ化オルトフェニルフェノールアクリレート(エトキシ構造を分子中に1mol有するアクリレート、25℃における粘度130mPa・s、屈折率1.577)を用いてハードコーティング組成物を調製した。表1に示された原料を、表1に示された固形分質量で順次混合し、撹拌して、ハードコーティング組成物を得た。
なお、成分(B)のエトキシ化オルトフェニルフェノールアクリレートの粘度測定は、B型粘度計(TVB-22L 東機産業株式会社製)を用いて測定した。試験サンプル100mlをガラス容器に採取し、20℃に温度調整した後、M1Rotorを用い60rpmの回転速度にて測定した。
また、成分(B)の屈折率は、JIS K0062に従って測定した。
塗工後、70℃にて1分間乾燥させ、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、ポリカーボネートフィルムの上に、膜厚3.0μmのハードコート層を形成した。
平均粒径40nmの15%酸化チタン分散液をイソブチルアルコールで5%に希釈し、紫外線硬化性能を有するモノマーであるウレタンアクリレート(根上工業社製、UN-3320HS)をMIBK(メチルイソブチルケトン)で5%に希釈したものを調整した。ウレタンアクリレート希釈液100質量部に対し、酸化チタン分散液の希釈液を40質量部、また光重合開始剤を0.25質量部(BASF社製 イルガキュア184)の比で混合し、更にIBA(イソブチルアルコール)で2.5質量%に希釈したものをバーコーター#3を用いて塗工した。
塗工後、70℃にて1分間乾燥させ、窒素雰囲気下、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、ハードコート層の上に、色差調整層を形成した。
得られた色差調整層上に、酸化インジウムと酸化錫が質量比95:5の組成で充填密度98%の酸化インジウム-酸化錫ターゲットを用いるスパッタリング法によって、非晶質のITO層を形成した。形成されたITO層の膜厚は約20nm、製膜後の表面抵抗値は約210Ω/□であった。引き続いて130℃90分の熱処理を行い、透明導電層(ITO層)を結晶化させることにより透明導電性積層体を作製した。ITO層が結晶化した後の透明導電層の表面抵抗値は約150Ω/□であった。作製した透明導電性積層体の特性を表1に示す。
ハードコート層の形成において、ハードコーティング組成物の組成を表1に記載されたものに変更したこと以外は、実施例1と同様の手順にてハードコーティング層を形成した。その後、色差調整層の形成において、酸化チタン分散液の希釈液充填量を表1記載の量に変更することを除き、実施例1と同様の手順にて、ハードコーティング層の上に色差調整層を形成した。更に、実施例1と同様の手順にて、色差調整層上に透明導電層を作製した。
なお、実施例E3においては、帝人化成製70μm光学用PCフィルム(ピュアエース)C110を用いて、透明導電性積層体を作製した。
ハードコート層の形成において、実施例1と同様の手順にてハードコーティング層を形成した。その後、色差調整層の形成において、酸化チタン分散液の希釈液充填量を表1記載の量に変更することを除き、実施例E1と同様の手順にて、ハードコーティング層の上に色差調整層を形成した。更に、実施例E1と同様の手順にて、色差調整層上に透明導電層を作製した。
なお、実施例E7およびE8においては、帝人デュポン製188μm光学用PETフィルム(帝人テトロンKEFW)を用いて、透明導電性積層体を作製した。
実施例9においては帝人デュポン製125μm光学用PETフィルム(帝人テトロンKEFW)を用いて、透明導電性積層体を作製した。
実施例E10においては帝人デュポン製50μm光学用PETフィルム(帝人テトロンKEL86W)を用いて、透明導電性積層体を作製した。
実施例E14においては帝人化成製75μm光学用変性PCフィルム(ピュアエースWR W-142)を用いて、透明導電性積層体を作製した。
実施例E15においては帝人化成製50μm光学用変性PCフィルム(ピュアエースWR S-148)を用いて、透明導電性積層体を作製した。
ハードコート層の形成において、実施例E1と同様の手順にてハードコーティング層を形成した。その後、色差調整層の形成において、平均粒径40nmの15%酸化チタン分散液をイソブチルアルコールで5%に希釈し、紫外線硬化性能を有するモノマーであるウレタンアクリレート(根上工業社製、UN-3320HS)をMIBKで5%に希釈したものを調整した。ウレタンアクリレート希釈液100質量部に対し、酸化チタン分散液の希釈液を40質量部、また光重合開始剤を0.25質量部(BASF社製 イルガキュア184)の比で混合し、更にIBAで2.5%に希釈したものをバーコーター#3を用いて塗工した。
塗工後、70℃にて1分間乾燥させ、窒素雰囲気下、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、ハードコート層の上に、色差調整層1を形成した。
次いで、同ウレタンアクリレート希釈液100質量部に対し、5%フッ化マグネシウム分散液を40質量部、また光重合開始剤を0.25質量部(BASF社製 イルガキュア184)の比で混合し、更にイソブチルアルコールで2.5%に希釈したものをバーコーター#3を用いて塗工した。
塗工後、70℃にて1分間乾燥させ、窒素雰囲気下、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、色差調整層1の上に、色差調整層2を形成した。更に、実施例1と同様の手順にて、色差調整層2上に透明導電層を形成し、透明導電性積層体を作製した。
色差調整層2の形成において、シリコンアクリレート(EB-1360:ダイセルサイテック社製)100質量部に対し、光重合開始剤(イルガキュア184:BASF社製)5質量部を混合し、メチルイソブチルケトンにて2.5%となるように希釈した調整液を用いることに変更した以外は、実施例E11と同様の手順にて順次、ハードコーティング層、色差調整層1、色差調整層2、透明導電層と形成した。
アンチブロッキング層の形成
実施例E1と同様の手順にてハードコート層を形成したコーティングフィルムを支持基材とし、ハードコート層の形成されていない側の面に、調製例1で得た相分離型のアンチブロッキング層形成組成物(I)をバーコーター#9を用いて塗工した。塗工後、70℃にて1分間乾燥させ、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、ハードコート層の形成されたコーティングフィルムの裏面上に、膜厚3.0μmの相分離型のアンチブロッキング層を形成した。その後、実施例1と同様の手順にて、ハードコーティング層の上に色差調整層を形成した。更に、実施例1と同様の手順にて、色差調整層上に透明導電層を作製した。
表2に示された配合により得られたハードコーティング組成物を用いてハードコート層を作成したこと以外は、実施例E1と同様にして、透明導電性積層体を作製した。
表2に示された配合により得られたハードコーティング組成物を用いてハードコート層を作成したこと以外は、実施例E9と同様にして、透明導電性積層体を作製した。
色差調整層の形成において、酸化チタン分散液の希釈液充填量を表2記載の量に変更したこと以外は、実施例E9と同様にして、透明導電性積層体を作製した。
実施例および比較例で得られた透明導電性積層体の反射率を、分光光度計(日立製作所U-3000)を用いて、入射角10度でJIS K5600-4-5に準拠して、反射率R1を測定した。反射率の測定において用いた光源の波長は500~750nmであった。
次いで、得られた透明導電性積層体を、12N塩酸、16N硝酸および水を12N塩酸:16N硝酸:水=3.3:1.0:7.6の質量比で混合して得られた強酸水溶液中に40℃で3分間浸漬し、乾燥させた。この透明導電性積層体に対して、波長500~750nmの光を照射し、反射率R2を測定した。なお、反射率R1は、図1中の(13)の部分に示されるような、透明導電層が存在する部分の反射率を意味し、反射率R2は、図1中の(11)の部分に示されるような、透明導電層が存在しない部分の反射率を意味する。
こうして得られたR1およびR2の差を△Rとした。波長500~750nmの間で△Rが最大値となった△Rの値を表1、2に示した。
実施例および比較例で得られた透明導電性積層体のヘイズ値を、ヘイズメーター(スガ試験機社製)を用いて、JIS K7105に準拠して測定し、ヘイズ値H1を得た。
次いで、得られた透明導電性積層体を、12N塩酸、16N硝酸および水を12N塩酸:16N硝酸:水=3.3:1.0:7.6の質量比で混合して得られた強酸水溶液中に40℃で3分間浸漬し、乾燥させた。この透明導電性積層体のヘイズ値を上記と同様に測定し、ヘイズ値H2を得た。ヘイズ値H1は、図1中の(13)の部分に示されるような、透明導電層が存在する部分のヘイズ値を意味し、ヘイズ値H2は、図1中の(11)の部分に示されるような、透明導電層が存在しない部分のヘイズ値を意味する。こうして得られたH1およびH2の差を△Hとした。
試験片を100×100mmの黒色アクリル板に光学フィルム用粘着剤を用い塗工面が表面にくるように貼り合せた。スタンド式3波長蛍光灯(TWINBARD製 SLH-399型)の蛍光管から垂直下10cmの距離にサンプルを設置して目視観察をし、評価結果が○以上のサンプルについては、更に太陽光下での目視観察を実施し、下記の評価基準に基づき、判定した。
◎ : 干渉縞(干渉模様)が3波長蛍光灯下でも太陽光下でも視認されない
○ : 3波長蛍光灯下で干渉縞(干渉模様)が視認されないが太陽光下では僅かに視認される
△ : 干渉縞(干渉模様)が僅かに視認される
× : 干渉縞(干渉模様)がはっきりと視認される
塩酸(12規定):硝酸(16規定):純水を質量比で3.3:1.0:7.6の割合で混合した強酸中に40℃で3分間浸漬し、エッチング処理して、パターニングを施したサンプルを用いて、スタンド式3波長蛍光灯(TWINBARD製 SLH-399型)の蛍光管から垂直下10cmの距離にサンプルを設置して目視観察をし、評価結果が○以上のサンプルは更に、太陽光の下で目視観察をし、下記基準で見た目の評価を行った。
◎:太陽光下および3波長蛍光灯下でパターン部と非パターン部の判別が困難
○:太陽光下ではパターン部と非パターン部の判別がわずかに可能だが、3波長蛍光灯下ではパターン部と非パターン部の判別が困難
△:3波長蛍光灯下でパターン部と非パターン部の判別がわずかに可能
×:3波長蛍光灯下でパターン部と非パターン部の判別が容易に可能
JIS K5400に準拠して密着性試験を実施した。実施例および比較例で得られた透明導電性積層体に、カッターナイフを用いて、1mm2のカット(碁盤目)が100個できるようにクロスカットを施した。次いで、作成した碁盤目の上にセロハン粘着テープを完全に付着させ、テープの一方の端を持ち上げて上方に剥がした。この剥離動作を同一箇所で3回実施した。その後、剥がれた碁盤目の数を、以下に記載の基準に沿って判定した。
10:剥がれなし
8:剥がれが5目以内である
6:剥がれが5目を超えて15目以内である
4:剥がれが15目を超えて35目以内である
2:剥がれが35目を超えて65目以内である
0:剥がれが65目を超えて100目以内である
I-184:1-ヒドロキシシクロヘキシルフェニルケトン、光重合開始剤
ビスフェノールA EO変性ジアクリレート:東亜合成株式会社製、アロニックスM-211B、ビスフェノールA EO(2mol)変性ジアクリレート
高屈折率フィラー1:ジルコニア ZRMIBK30WT%(酸化ジルコニウム、CIKナノテック社製)
高屈折率フィラー2:チタニア TiMIBK15WT%(酸化チタン、(CIKナノテック社製)
2官能ウレタンアクリレート:NV100:CN-9893(サートマー社製)
を示す。
比較例E3は、成分(A)の代わりに、ビスフェノールA骨格を有するジアクリレートを用いた例である。この比較例3では、△Rが1を超えており、視認性が低下した。また干渉縞の発生が確認された。
比較例E4は、成分(B)の代わりに、アクリロイルモルフォリンを用いた例である。この比較例E4では、△Rが1を超えており、視認性が低下した。また干渉縞の発生が確認された。
比較例E5、E6は、成分(A)および(B)を用いる代わりに、高屈折率剤である酸化ジルコニアまたは酸化チタンを用いた例である。これらの比較例では、△Rが1を大幅に超えており、視認性が大きく低下した。また干渉縞の発生が確認された。
比較例E7~E9は、ハードコート層に伸長性を付与することを目的として、2官能ウレタンアクリレートを用いた例である。これらの比較例においては、ハードコート層の形成において2官能ウレタンアクリレートを用いて伸長性を向上させても、△Rは1を超えており、良好な視認性を得ることができなかった。
比較例E10は、色差調整層に含まれる粒子の総量が、硬化樹脂成分100質量部に対して200質量部を超える例である。この場合は、密着性が低下することとなった。
ハードコート層の形成
成分(A)として、製造例1で得られたフェノールノボラック型エポキシアクリレート(1)を、成分(B)として、エトキシ化オルトフェニルフェノールアクリレート(エトキシ構造を分子中に1mol有するアクリレート、25℃における粘度130mPa・s、屈折率1.577)を、成分(C)として、オグソールEA-0200(下記式(II)-1において、各Rが水素原子であり、m+n=2である、フルオレン骨格含有アクリレート、大阪ガスケミカル社製)
なお、成分(B)のエトキシ化オルトフェニルフェノールアクリレートの粘度測定は、B型粘度計(TVB-22L 東機産業株式会社製)を用いて測定した。試験サンプル100mlをガラス容器に採取し、20℃に温度調整した後、M1Rotorを用い60rpmの回転速度にて測定した。
また、成分(B)の屈折率は、JIS K0062に従って測定した。
塗工後、70℃にて1分間乾燥させ、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、ポリカーボネートフィルムの上に、膜厚3.0μmのハードコート層を形成した。
平均粒径40nmの15%酸化チタン分散液をイソブチルアルコールで5%に希釈し、紫外線硬化性能を有するモノマーであるウレタンアクリレート(根上工業社製、UN-3320HS)をMIBK(メチルイソブチルケトン)で5%に希釈したものを調整した。ウレタンアクリレート希釈液100質量部に対し、酸化チタン分散液の希釈液を40質量部、また光重合開始剤を0.25質量部(BASF社製 イルガキュア184)の比で混合し、更にIBA(イソブチルアルコール)で2.5質量%に希釈したものをバーコーター#3を用いて塗工した。
塗工後、70℃にて1分間乾燥させ、窒素雰囲気下、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、ハードコート層の上に、色差調整層を形成した。
得られた色差調整層上に、酸化インジウムと酸化錫が質量比95:5の組成で充填密度98%の酸化インジウム-酸化錫ターゲットを用いるスパッタリング法によって、非晶質のITO層を形成した。形成されたITO層の膜厚は約20nm、製膜後の表面抵抗値は約210Ω/□であった。引き続いて130℃90分の熱処理を行い、透明導電層(ITO層)を結晶化させることにより透明導電性積層体を作製した。ITO層が結晶化した後の透明導電層の表面抵抗値は約150Ω/□であった。作製した透明導電性積層体の特性を表1に示す。
ハードコート層の形成において、ハードコーティング組成物の組成を表3に記載されたものに変更した。その後、色差調整層の形成において、色差調整層の形成において、酸化チタン分散液の希釈液充填量を表1記載の量に変更することを除き、実施例F1と同様の手順にて、ハードコーティング層の上に色差調整層を形成した。更に、実施例F1と同様の手順にて、色差調整層上に透明導電層を作製した。
なお、実施例F2においては、帝人デュポン製188μm光学用PETフィルム(帝人テトロンKEFW)を用いて、透明導電性積層体を作製した。
実施例F3、F7においては帝人デュポン製125μm光学用PETフィルム(帝人テトロンKEFW)を用いて、透明導電性積層体を作製した。
実施例F4、F5においては帝人デュポン製50μm光学用PETフィルム(帝人テトロンKEL86W)を用いて、透明導電性積層体を作製した。
実施例F8においては帝人化成製75μm光学用変性PCフィルム(ピュアエースWR W-142)を用いて、透明導電性積層体を作製した。
実施例F9においては帝人化成製50μm光学用変性PCフィルム(ピュアエースWR S-148)を用いて、透明導電性積層体を作製した。
また、実施例F4では、成分(C)として、オグソールEA-F5503(大阪ガスケミカル社製)を用いた。
ハードコート層の形成において、実施例F3と同様の手順にてハードコーティング層を形成した。その後、色差調整層の形成において、平均粒径40nmの15%酸化チタン分散液をイソブチルアルコールで5%に希釈し、紫外線硬化性能を有するモノマーであるウレタンアクリレート(根上工業社製、UN-3320HS)をMIBKで5%に希釈したものを調整した。ウレタンアクリレート希釈液100質量部に対し、酸化チタン分散液の希釈液を40質量部、また光重合開始剤を0.25質量部(BASF社製 イルガキュア184)の比で混合し、更にIBAで2.5%に希釈したものをバーコーター#3を用いて塗工した。
塗工後、70℃にて1分間乾燥させ、窒素雰囲気下、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、ハードコート層の上に、色差調整層1を形成した。
次いで、同ウレタンアクリレート希釈液100質量部に対し、5%フッ化マグネシウム分散液を40質量部、また光重合開始剤を0.25質量部(BASF社製 イルガキュア184)の比で混合し、更にイソブチルアルコールで2.5%に希釈したものをバーコーター#3を用いて塗工した。
塗工後、70℃にて1分間乾燥させ、窒素雰囲気下、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、色差調整層1の上に、色差調整層2を形成した。更に、実施例F1と同様の手順にて、色差調整層2上に透明導電層を形成し、透明導電性積層体を作製した。
表4に示された配合により得られたハードコーティング組成物を用いてハードコート層を作成したこと以外は、実施例F1と同様にして、透明導電性積層体を作製した。
なお比較例F1、F2においては帝人デュポン製125μm光学用PETフィルム(帝人テトロンKEFW)を用いて、透明導電性積層体を作製した。
I-184:1-ヒドロキシシクロヘキシルフェニルケトン、光重合開始剤
ビスフェノールA EO変性ジアクリレート:東亜合成株式会社製、アロニックスM-211B、ビスフェノールA EO(2mol)変性ジアクリレート
高屈折率フィラー1:ジルコニア ZRMIBK30WT%(酸化ジルコニウム、CIKナノテック社製)
高屈折率フィラー2:チタニア TiMIBK15WT%(酸化チタン、(CIKナノテック社製)
2官能ウレタンアクリレート:NV100:CN-9893(サートマー社製)
を示す。
比較例F2は、成分(A)の量が本発明の範囲より少なく、成分(C)の量が本発明の範囲より多い例である。この場合は、△Hが0.3%を超えており、視認性が低下した。
攪拌機、温度計、コンデンサーを備えた4Lフラスコに3molカプロラクトン変性2-ヒドロキシエチルアクリレート(ダイセル化学工業製 プラクセルFA3)1832g、無水フタル酸592g、トリフェニルホスフィン3.6g、ハイドロキノン1.36gを加え、100℃に昇温して反応させ、酸化が210mgKOH/gとなった時点でビスフェノールAジグリシジルエーテル(ジャパンエポキシレジン製 エピコート828)を748g加え、酸化が1mgKOH/gになるまで反応させ、不飽和二重結合を2つ有するアクリレート化合物である色差調整層用樹脂(C1)を得た。
得られた色差調整層用樹脂(C1)は、重量平均分子量が1550であり、水酸基価は85mgKOH/g、最大破断伸度は120%であった。
攪拌機、温度計、コンデンサーを備えた4Lフラスコに3molカプロラクトン変性2-ヒドロキシエチルアクリレート(ダイセル化学工業製 プラクセルFA3)1832g、無水コハク酸400g、トリフェニルホスフィン3.6g、ハイドロキノン1.36gを加え、100℃に昇温して反応させ、酸化が210mgKOH/gとなった時点でビスフェノールAジグリシジルエーテル(ジャパンエポキシレジン製 エピコート828)を748g加え、酸化が1mgKOH/gになるまで反応させ、不飽和二重結合を2つ有するアクリレート化合物である色差調整層用樹脂(C2)を得た。
得られた色差調整層用樹脂(C2)は、重量平均分子量が1450であり、水酸基価は94mgKOH/g、最大破断伸度は110%であった。
ハードコート層の形成
成分(A)として、製造例1で得られたフェノールノボラック型エポキシアクリレート(1)を、成分(B)として、エトキシ化オルトフェニルフェノールアクリレート(エトキシ構造を分子中に1mol有するアクリレート、25℃における粘度130mPa・s、屈折率1.577)を用いてハードコーティング組成物を調製した。表1に示された原料を、表1に示された固形分質量で順次混合し、撹拌して、ハードコーティング組成物を得た。
なお、成分(B)のエトキシ化オルトフェニルフェノールアクリレートの粘度測定は、B型粘度計(TVB-22L 東機産業株式会社製)を用いて測定した。試験サンプル100mlをガラス容器に採取し、20℃に温度調整した後、M1Rotorを用い60rpmの回転速度にて測定した。
また、成分(B)の屈折率は、JIS K0062に従って測定した。
塗工後、70℃にて1分間乾燥させ、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、ポリカーボネートフィルムの上に、膜厚3.0μmのハードコート層を形成した。
平均粒径40nmの15%酸化チタン分散液をイソブチルアルコールで5%に希釈し、製造例4で得られた色差調整層用樹脂(C1)をMIBK(メチルイソブチルケトン)で5%に希釈したものを調整した。(C1)希釈液100質量部に対し、酸化チタン分散液の希釈液を40質量部、また光重合開始剤を0.25質量部(BASF社製 イルガキュア184)の比で混合し、更にIBA(イソブチルアルコール)で2.5質量%に希釈したものをバーコーター#3を用いて塗工した。
塗工後、70℃にて1分間乾燥させ、窒素雰囲気下、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、ハードコート層の上に、色差調整層を形成した。
得られた色差調整層上に、酸化インジウムと酸化錫が質量比95:5の組成で充填密度98%の酸化インジウム-酸化錫ターゲットを用いるスパッタリング法によって、非晶質のITO層を形成した。形成されたITO層の膜厚は約20nm、製膜後の表面抵抗値は約210Ω/□であった。引き続いて130℃90分の熱処理を行い、透明導電層(ITO層)を結晶化させることにより透明導電性積層体を作製した。ITO層が結晶化した後の透明導電層の表面抵抗値は約150Ω/□であった。作製した透明導電性積層体の特性を表1に示す。
ハードコート層の形成において、ハードコーティング組成物の組成を表5に記載されたものに変更したこと以外は、実施例G1と同様の手順にてハードコーティング層を形成した。その後、色差調整層の形成において、酸化チタン分散液の希釈液充填量を表1記載の量に変更することを除き、実施例G1と同様の手順にて、ハードコーティング層の上に色差調整層を形成した。更に、実施例G1と同様の手順にて、色差調整層上に透明導電層を作製した。
ハードコート層の形成において、ハードコーティング組成物の塗布厚を表5に記載されたものに変更したこと以外は、実施例G5と同様の手順にてハードコーティング層を形成した。その後、色差調整層の形成において、酸化チタン分散液の希釈液充填量を表5記載の量に変更することを除き、実施例G1と同様の手順にて、ハードコーティング層の上に色差調整層を形成した。更に、実施例G1と同様の手順にて、色差調整層上に透明導電層を作製した。
なお、実施例G7においては、色差調整層の形成において、製造例5で得られた色差調整用樹脂(C2)を用いて、導電性積層体を作製した。
実施例G8およびG9においては、帝人デュポン製188μm光学用PETフィルム(帝人テトロンKEFW)を用いて、導電性積層体を作製した。
実施例G10においては帝人化成製75μm光学用変性PCフィルム(ピュアエースWR W-142)を用いて、導電性積層体を作製した。
実施例G11においては帝人化成製50μm光学用変性PCフィルム(ピュアエースWR S-148)を用いて、導電性積層体を作製した。
表6に示された配合により得られたハードコーティング組成物を用いてハードコート層を作成したこと以外は、実施例G1と同様にして、導電性積層体を作製した。
表8に示された配合により得られたハードコーティング組成物を用いてハードコート層を作成したこと以外は、実施例G8と同様にして、導電性積層体を作製した。
色差調整層の形成において、酸化チタン分散液の希釈液充填量を表6記載の量に変更したこと以外は、実施例G9と同様にして、導電性積層体を作製した。
色差調整層の形成において、色差調整層用樹脂を表7記載の樹脂に変更したこと以外は、実施例G8と同様にして、導電性積層体を作製した。
なお、色差調整層用樹脂(C3)はDIC株式会社製WJV-572を用い、分子量は3600、不飽和二重結合量は6、水酸基価は10mg/KOH、最大破断伸度は30%未満であり、
色差調整用樹脂(C4)はDIC株式会社製WJV-573を用い、分子量は2700、不飽和二重結合量は6、水酸基価は25mg/KOH、最大破断伸度は30%未満であり
色差調整用樹脂(C5)はDIC株式会社製V-4025を用い、分子量は1200、不飽和二重結合量は6、水酸基価は12mg/KOH、最大破断伸度は30%未満であり、
色差調整用樹脂(C6)は三菱化学株式会社製RA-4500を用い、分子量は750、不飽和二重結合量は4、水酸基価は76mg/KOH、最大破断伸度は30%未満であり色差調整用樹脂(C7)は三菱化学株式会社製RA-5000を用い、分子量は12000、不飽和二重結合量は2~3、水酸基価は62mg/KOH、最大破断伸度は80%であり、
色差調整用樹脂(C8)は三菱化学株式会社製RA-3080を用い、分子量は55000、不飽和二重結合量は2~3、水酸基価は72mg/KOH、最大破断伸度は100%であり、
色差調整用樹脂(C9)は三菱化学株式会社製RA-3091を用い、分子量は9400、不飽和二重結合量は2~3、水酸基価は73mg/KOH、最大破断伸度は80%であり、
色差調整用樹脂(C10)は三菱化学株式会社製XRA-2109を用い、分子量は1350、不飽和二重結合量は4~5、水酸基価は59mg/KOH、最大破断伸度は30%未満であり、
色差調整用樹脂(C11)は三菱化学株式会社製RA-3053を用い、分子量は12000、不飽和二重結合量は2、水酸基価は53mg/KOH、最大破断伸度は100%であり、
色差調整用樹脂(C12)は調整例2で得られたフェノールノボラック型エポキシアクリレートを用い、最大破断伸度は80%であった。
JIS K5400に準拠して密着性試験を実施した。実施例および比較例で得られた導電性積層体に、1mm2のカット(碁盤目)が100個できるようにクロスカットを施した。次いで、作成した碁盤目の上にセロハン粘着テープを完全に付着させ、テープの一方の端を持ち上げて上方に剥がした。この剥離動作を同一箇所で3回実施した。その後、剥がれた碁盤目の数を、以下に記載の基準に沿って判定した。
10:剥がれなし
8:剥がれが5目以内である
6:剥がれが5目を超えて15目以内である
4:剥がれが15目を超えて35目以内である
2:剥がれが35目を超えて65目以内である
0:剥がれが65目を超えて100目以内である
実施例および比較例で透明導電性積層体作成時の色差調整層上に、酸化インジウムと酸化錫が質量比95:5の組成で充填密度98%の酸化インジウム-酸化錫ターゲットおよび純度99.5%の銅ターゲットを用い、スパッタリング法によって、非晶質のITO層とCu層を順次積層形成した。引き続いて130℃90分の熱処理を行い、透明導電層(ITO層)を結晶化させた。形成されたITO層の膜厚は約20nm、Cu層の膜厚は300nmであり、熱処理後の表面抵抗値はいずれも約0.2Ω/□であった。
上記のようにして得られた試験片に対し、JIS K5400に準拠して密着性試験を実施した。上記試験片に、1mm2のカット(碁盤目)が100個できるようにクロスカットを施した。次いで、作成した碁盤目の上にセロハン粘着テープを完全に付着させ、テープの一方の端を持ち上げて上方に剥がした。この剥離動作を同一箇所で3回実施した。その後、剥がれた碁盤目の数を、以下に記載の基準に沿って判定した。
10:剥がれなし
8:剥がれが5目以内である
6:剥がれが5目を超えて15目以内である
4:剥がれが15目を超えて35目以内である
2:剥がれが35目を超えて65目以内である
0:剥がれが65目を超えて100目以内である
I-184:1-ヒドロキシシクロヘキシルフェニルケトン、光重合開始剤
ビスフェノールA EO変性ジアクリレート:東亜合成株式会社製、アロニックスM-211B、ビスフェノールA EO(2mol)変性ジアクリレート
高屈折率フィラー1:ジルコニア ZRMIBK30WT%(酸化ジルコニウム、CIKナノテック社製)
高屈折率フィラー2:チタニア TiMIBK15WT%(酸化チタン、(CIKナノテック社製)
2官能ウレタンアクリレート:NV100:CN-9893(サートマー社製)
を示す。
比較例G3は、成分(A)の代わりに、ビスフェノールA骨格を有するジアクリレートを用いた例である。この比較例G3では、△Rが1を超えており、視認性が低下した。また干渉縞の発生が確認された。
比較例G4は、成分(B)の代わりに、アクリロイルモルフォリンを用いた例である。この比較例G4では、△Rが1を超えており、視認性が低下した。また干渉縞の発生が確認された。
比較例G5、G6は、成分(A)および(B)を用いる代わりに、高屈折率剤である酸化ジルコニアまたは酸化チタンを用いた例である。これらの比較例では、△Rが1を大幅に超えており、視認性が大きく低下した。また干渉縞の発生が確認された。
比較例G7~G9は、ハードコート層に伸長性を付与することを目的として、2官能ウレタンアクリレートを用いた例である。これらの比較例においては、ハードコート層の形成において2官能ウレタンアクリレートを用いて伸長性を向上させても、△Rは1を超えており、良好な視認性を得ることができなかった。
比較例G10は、色差調整層に含まれる粒子の総量が、硬化樹脂成分100質量部に対して200質量部を超える例である。この場合は、密着性が低下することとなった。
比較例G11~G20はいずれも色差調整層の樹脂組成を変更した例であり、色差調整層の分子量範囲、不飽和二重結合数の範囲、最大破断伸度の範囲、水酸基価の範囲を請求項1記載の範囲から逸脱するものであり、いずれの場合においても、補助電極層積層時の密着性にて良好な結果を得ることができなかった。
高屈折率アンチブロッキング層の形成
第1成分として、製造例4で得られた不飽和二重結合含有アクリル共重合体(I)を用いた。第2成分の成分(A)として、製造例1で得られたフェノールノボラック型エポキシアクリレート(1)を、成分(B)として、エトキシ化オルトフェニルフェノールアクリレート(エトキシ構造を分子中に1mol有するアクリレート、25℃における粘度130mPa・s、屈折率1.577)を、表1に示された量で用いてアンチブロッキング層形成組成物を調製した。ここで第2成分のSP値は12.2であった。
表8に示された原料を、表8に示された固形分質量で順次混合し、撹拌して、アンチブロッキング層形成組成物を得た。なお第2成分のSP値は、第2成分に含まれる成分(A)、成分(B)SP値、含有量に対し、重量平均にて算出した。
塗工後、70℃にて1分間乾燥させ、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、ポリカーボネートフィルムの上に、膜厚3.0μmの高屈折率アンチブロッキング層を形成した。
また、成分(B)の屈折率は、JIS K0062に従って測定した。
平均粒径40nmの15%酸化チタン分散液をイソブチルアルコールで5%に希釈し、紫外線硬化性能を有するモノマーであるウレタンアクリレート(根上工業社製、UN-3320HS)をMIBK(メチルイソブチルケトン)で5%に希釈したものを調整した。ウレタンアクリレート希釈液100質量部に対し、酸化チタン分散液の希釈液を40質量部、また光重合開始剤を0.25質量部(BASF社製 イルガキュア184)の比で混合し、更にIBA(イソブチルアルコール)で2.5質量%に希釈したものをバーコーター#3を用いて塗工した。
塗工後、70℃にて1分間乾燥させ、窒素雰囲気下、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、高屈折率アンチブロッキング層の上に、色差調整層を形成した。
得られた色差調整層上に、酸化インジウムと酸化錫が質量比95:5の組成で充填密度98%の酸化インジウム-酸化錫ターゲットを用いるスパッタリング法によって、非晶質のITO層を形成した。形成されたITO層の膜厚は約20nm、製膜後の表面抵抗値は約210Ω/□であった。引き続いて130℃90分の熱処理を行い、透明導電層(ITO層)を結晶化させることにより透明導電性積層体を作製した。ITO層が結晶化した後の透明導電層の表面抵抗値は約150Ω/□であった。作製した透明導電性積層体の特性を表1に示す。
高屈折率アンチブロッキング層の形成において、アンチブロッキング層形成組成物の組成を表8に記載されたものに変更したこと以外は、実施例H1と同様の手順にて高屈折率アンチブロッキング層を形成した。その後、色差調整層の形成において、酸化チタン分散液の希釈液充填量を表8記載の量に変更することを除き、実施例H1と同様の手順にて、高屈折率アンチブロッキング層の上に色差調整層を形成した。更に、実施例H1と同様の手順にて、色差調整層上に透明導電層を作製した。
なお、実施例H3においては、帝人化成製70μm光学用PCフィルム(ピュアエース)C110を用いて、透明導電性積層体を作製した。
高屈折率アンチブロッキング層の形成において、実施例H1と同様の手順にて高屈折率アンチブロッキング層を形成した。その後、色差調整層の形成において、酸化チタン分散液の希釈液充填量を表8記載の量に変更することを除き、実施例H1と同様の手順にて、高屈折率アンチブロッキング層の上に色差調整層を形成した。更に、実施例H1と同様の手順にて、色差調整層上に透明導電層を作製した。
なお、実施例H7およびH8においては、帝人デュポン製188μm光学用PETフィルム(帝人テトロンKEFW)を用いて、透明導電性積層体を作製した。
実施例H9においては帝人デュポン製125μm光学用PETフィルム(帝人テトロンKEFW)を用いて、透明導電性積層体を作製した。
実施例H10においては帝人デュポン製50μm光学用PETフィルム(帝人テトロンKEL86W)を用いて、透明導電性積層体を作製した。
実施例H14においては帝人化成製75μm光学用変性PCフィルム(ピュアエースWR W-142)を用いて、透明導電性積層体を作製した。
実施例H15においては帝人化成製50μm光学用変性PCフィルム(ピュアエースWR S-148)を用いて、透明導電性積層体を作製した。
高屈折率アンチブロッキング層の形成において、実施例H1と同様の手順にて高屈折率アンチブロッキング層を形成した。その後、色差調整層の形成において、平均粒径40nmの15%酸化チタン分散液をイソブチルアルコールで5%に希釈し、紫外線硬化性能を有するモノマーであるウレタンアクリレート(根上工業社製、UN-3320HS)をMIBKで5%に希釈したものを調整した。ウレタンアクリレート希釈液100質量部に対し、酸化チタン分散液の希釈液を40質量部、また光重合開始剤を0.25質量部(BASF社製 イルガキュア184)の比で混合し、更にIBAで2.5%に希釈したものをバーコーター#3を用いて塗工した。
塗工後、70℃にて1分間乾燥させ、窒素雰囲気下、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、高屈折率アンチブロッキング層の上に、色差調整層1を形成した。
次いで、同ウレタンアクリレート希釈液100質量部に対し、5%フッ化マグネシウム分散液を40質量部、また光重合開始剤を0.25質量部(BASF社製 イルガキュア184)の比で混合し、更にイソブチルアルコールで2.5%に希釈したものをバーコーター#3を用いて塗工した。
塗工後、70℃にて1分間乾燥させ、窒素雰囲気下、紫外線照射機(Fusion製)にて350mJの紫外線を照射し、色差調整層1の上に、色差調整層2を形成した。更に、実施例H1と同様の手順にて、色差調整層2上に透明導電層を形成し、透明導電性積層体を作製した。
色差調整層2の形成において、シリコンアクリレート(EB-1360:ダイセルサイテック社製)100質量部に対し、光重合開始剤(イルガキュア184:BASF社製)5質量部を混合し、メチルイソブチルケトンにて2.5%となるように希釈した調整液を用いることに変更した以外は、実施例H11と同様の手順にて順次、高屈折率アンチブロッキング層、色差調整層1、色差調整層2、透明導電層と形成した。
表9に示された配合により得られたアンチブロッキング層形成組成物を用いて高屈折率アンチブロッキング層を作成したこと以外は、実施例H1と同様にして、透明導電性積層体を作製した。
表9に示された配合により得られたアンチブロッキング層形成組成物を用いて高屈折率アンチブロッキング層を作成したこと以外は、実施例H9と同様にして、透明導電性積層体を作製した。
色差調整層の形成において、酸化チタン分散液の希釈液充填量を表2記載の量に変更したこと以外は、実施例H9と同様にして、透明導電性積層体を作製した。
実施例および比較例で得られたアンチブロッキングフィルムを、2×5cmの大きさに切り出し、塗工面をPETフィルム(易接着層未塗布)面に重ね合わせ、ガラス板に挟んで200gf/cm2条件にて、室温で24時間放置した。その後、ブロッキング現象(AB性)を、下記基準により目視評価した。
○ : アンチブロッキング性あり
× : アンチブロッキング性なし
I-184:1-ヒドロキシシクロヘキシルフェニルケトン、光重合開始剤
ビスフェノールA EO変性ジアクリレート:東亜合成株式会社製、アロニックスM-211B、ビスフェノールA EO(2mol)変性ジアクリレート、SP値11.3
アクリロイルモルフォリン:SP値11.9
2官能ウレタンアクリレート:NV100:CN-9893(サートマー社製)、SP値11.1
高屈折率フィラー1:ジルコニア ZRMIBK30WT%(酸化ジルコニウム、CIKナノテック社製)
高屈折率フィラー2:チタニア TiMIBK15WT%(酸化チタン、(CIKナノテック社製)
を示す。
比較例H3は、成分(A)の代わりに、ビスフェノールA骨格を有するジアクリレートを用いた例である。この比較例H3では、△Rが1を超えており、視認性が低下した。また干渉縞の発生が確認された。
比較例H4は、成分(B)の代わりに、アクリロイルモルフォリンを用いた例である。この比較例H4では、△Rが1を超えており、視認性が低下した。また干渉縞の発生が確認された。
比較例H5、H6は、成分(A)および(B)を用いる代わりに、高屈折率剤である酸化ジルコニアまたは酸化チタンを用いた例である。これらの比較例では、△Rが1を大幅に超えており、視認性が大きく低下した。また干渉縞の発生が確認された。
比較例H7~H9は、高屈折率アンチブロッキング層に伸長性を付与することを目的として、2官能ウレタンアクリレートを用いた例である。これらの比較例においては、高屈折率アンチブロッキング層の形成において2官能ウレタンアクリレートを用いて伸長性を向上させても、△Rは1を超えており、良好な視認性を得ることができなかった。
比較例H10は、色差調整層に含まれる粒子の総量が、硬化樹脂成分100質量部に対して200質量部を超える例である。この場合は、密着性が低下することとなった。
3:ハードコート層、
5:色差調整層、
7:透明導電層、
10:透明導電性積層体、
11:エッチング処理によるパターニングによって、透明導電層(7)が取り除かれた部分、
13:エッチング処理においてマスクされていた部分。
Claims (26)
- 透明高分子基材の少なくとも一方の面上に、ハードコート層、色差調整層および透明導電層が順次積層された透明導電性積層体であり、
(1)ハードコート層が、
(A)2またはそれ以上のアクリレート基を有する、フェノールノボラック型アクリレート、および
(B)炭素数2または3のアルキレンオキシド構造を分子中に1~2mol有する、芳香族基含有モノまたはポリ(メタ)アクリレート化合物、
を含むハードコーティング組成物を塗装して硬化させることによって得られたハードコート層であって、
ハードコーティング組成物中に含まれる樹脂成分100質量部に対して、フェノールノボラック型アクリレート(A)は60~85質量部および(メタ)アクリレート(B)は15~30質量部含まれ、
(2)色差調整層は、
硬化樹脂成分(i)、そして
平均一次粒子径100nm以下である金属酸化物粒子(ii)および/または平均一次粒子径100nm以下である金属フッ化物粒子(iii)を含み、および、
色差調整層中における粒子(ii)および(iii)の総質量は、硬化樹脂成分(i)100質量部に対して0~200質量部であり、
(3)透明導電性積層体に対して波長500~750nmの範囲の光源を照射した場合における反射率(R1)、および、透明導電性積層体を、12N塩酸、16N硝酸および水を12N塩酸:16N硝酸:水=3.3:1.0:7.6の質量比で混合して得られた強酸水溶液中に40℃で3分間浸漬した後、乾燥させた後の透明導電性積層体に対して、波長500~750nmの範囲の光源を照射した場合における反射率(R2)において、R1およびR2の差△Rが1以下である、
透明導電性積層体。 - 前記色差調整層の硬化樹脂成分(i)が紫外線硬化型樹脂であり、および
透明導電性積層体のヘイズ値(H1)および、透明導電性積層体を、12N塩酸、16N硝酸および水を12N塩酸:16N硝酸:水=3.3:1.0:7.6の質量比で混合して得られた強酸水溶液中に40℃で3分間浸漬した後、乾燥させた後の透明導電性積層体のヘイズ値(H2)の差△Hが、0.3%以下である、
請求項1記載の透明導電性積層体。 - 前記(メタ)アクリレート(B)は、屈折率が1.56~1.64の範囲内である、芳香族基含有(メタ)アクリレートである、請求項1~3いずれかに記載の透明導電性積層体。
- 前記ハードコート層が、成分(A)および(B)の他に、さらに、
(C)2またはそれ以上の(メタ)アクリレート基を有する、フルオレン骨格含有(メタ)アクリレートを含むハードコーティング組成物を塗装して硬化させることによって得られたハードコート層であって、
ハードコーティング組成物中に含まれる樹脂成分100質量部に対して、フェノールノボラック型アクリレート(A)は40~70質量部、(メタ)アクリレート(B)は10~30質量部およびフルオレン骨格含有(メタ)アクリレート(C)は15~40質量部含まれる、
請求項1記載の透明導電性積層体。 - 前記ハードコート層中に含まれる、ZnO、TiO2、CeO2、SnO2、ZrO2およびインジウム-スズ酸化物の総含有量がハードコート層中の0.0001質量%以下である、請求項1~6いずれかに記載の透明導電性積層体。
- 前記ハードコート層の屈折率が1.565~1.620である、請求項1~7いずれかに記載の透明導電性積層体。
- 前記色差調整層の硬化樹脂成分(i)が、2またはそれ以上のアクリレート基を有する分子量1400~1800の(メタ)アクリレートであり、硬化樹脂成分(i)は水酸基価が60~100mgKOH/gであり、かつ
色差調整層の厚みが50nm以上200nm以下である、請求項1記載の透明導電性積層体。 - 前記透明導電層が、酸化インジウムを含む結晶質層であり、かつ、透明導電層の厚さが5~50nmである、請求項1~9いずれかに記載の透明導電性積層体。
- 前記色差調整層および透明導電層の間に金属酸化物層が存在し、金属酸化物層の厚さが0.5~5.0nmである、請求項1~10いずれかに記載の透明導電性積層体。
- 透明高分子基材の一方の面上に、ハードコート層、色差調整層および透明導電層が順に積層されており、かつ、
透明高分子基材の他の一方の面上に、アンチブロッキング層が形成された、請求項1~11いずれかに記載の透明導電性積層体。 - 前記アンチブロッキング層は、第1成分および第2成分を含むアンチブロッキング層形成組成物によって形成された層であり、
第1成分は不飽和二重結合含有アクリル共重合体を含み、第2成分は多官能アクリレートを含み、
第1成分のSP値(SP1)および第2成分のSP値(SP2)の差△SPが1~2の範囲内であり、
アンチブロッキング層形成組成物を塗装した後に、第1成分と第2成分が相分離を生じ、表面に微細な凹凸を有するアンチブロッキング層が形成される、
請求項12記載の透明導電性積層体。 - 請求項1~13いずれかに記載の透明導電性積層体を有するタッチパネル。
- 透明高分子基材の少なくとも一方の面上に、高屈折率アンチブロッキング層、色差調整層および透明導電層が順次積層された透明導電性積層体であり、
(1)高屈折率アンチブロッキング層が、第1成分および第2成分を含むアンチブロッキング層形成組成物によって形成された層であって、
第1成分が、不飽和二重結合含有アクリル共重合体であり、
第2成分が、
(A)2またはそれ以上のアクリレート基を有する、フェノールノボラック型アクリレート、および
(B)炭素数2または3のアルキレンオキシド構造を分子中に1~2mol有する、芳香族基含有モノまたはポリ(メタ)アクリレート、
を含み、
第2成分100質量部に対して、フェノールノボラック型アクリレート(A)は60~85質量部および(メタ)アクリレート(B)は15~30質量部含まれており、
第1成分のSP値(SP1)および第2成分のSP値(SP2)の差△SPが1~4の範囲内であり、
組成物中に含まれる第1成分および第2成分の質量比は、第1成分:第2成分=0.5:99.5~20:80であり、
アンチブロッキング層形成組成物を塗装した後に、第1成分と第2成分が層分離を生じ、表面に微細な凹凸を有するアンチブロッキング層が形成され、
(2)色差調整層は、
硬化樹脂成分(i)、そして
平均一次粒子径100nm以下である金属酸化物粒子(ii)および/または平均一次粒子径100nm以下である金属フッ化物粒子(iii)を含み、および、色差調整層中における粒子(ii)および(iii)の総質量は、硬化樹脂成分(i)100質量部に対して0~200質量部であり、
(3)透明導電性積層体に対して波長500~750nmの範囲の光源を照射した場合における反射率(R1)、および、透明導電性積層体を、12N塩酸、16N硝酸および水を12N塩酸:16N硝酸:水=3.3:1.0:7.6の質量比で混合して得られた強酸水溶液中に40℃で3分間浸漬した後、乾燥させた後の透明導電性積層体に対して、波長500~750nmの範囲の光源を照射した場合における反射率(R2)において、R1およびR2の差△Rが1以下である、
透明導電性積層体。 - 前記色差調整層の硬化樹脂成分(i)が紫外線硬化型樹脂であり、および
透明導電性積層体のヘイズ値(H1)および、透明導電性積層体を、12N塩酸、16N硝酸および水を12N塩酸:16N硝酸:水=3.3:1.0:7.6の質量比で混合して得られた強酸水溶液中に40℃で3分間浸漬した後、乾燥させた後の透明導電性積層体のヘイズ値(H2)の差△Hが、0.3%以下である、
請求項15記載の透明導電性積層体。 - 前記(メタ)アクリレート(B)は、屈折率が1.56~1.64の範囲内である、芳香族基含有(メタ)アクリレートである、請求項15~17いずれかに記載の透明導電性積層体。
- 前記高屈折率アンチブロッキング層中に含まれる、ZnO、TiO2、CeO2、SnO2、ZrO2およびインジウム-スズ酸化物の総含有量がアンチブロッキング層中の0.0001質量%以下である、請求項15~18いずれかに記載の透明導電性積層体。
- 前記高屈折率アンチブロッキング層の屈折率が1.565~1.620であり、かつ、高屈折率アンチブロッキング層は、算術平均粗さ(Ra)が0.001~0.09μmであり、十点平均粗さ(Rz)が0.01~0.5μmである、
請求項15~19いずれかに記載の透明導電性積層体。 - 前記高屈折率アンチブロッキング層が厚さ0.05~10μmである、請求項15~20いずれかに記載の透明導電性積層体。
- 前記透明導電層が、酸化インジウムを含む結晶質層であり、かつ、透明導電層の厚さが5~50nmである、請求項15~21ずれかに記載の透明導電性積層体。
- 前記色差調整層および透明導電層の間に金属酸化物層が存在し、金属酸化物層の厚さが0.5~5.0nmである、請求項15~22いずれかに記載の透明導電性積層体。
- 透明高分子基材の一方の面上に、高屈折率アンチブロッキング層、色差調整層および透明導電層が順に積層されており、かつ、
透明高分子基材の他の一方の面上に、アンチブロッキング層が形成された、請求項15~23いずれかに記載の透明導電性積層体。 - 前記アンチブロッキング層は、第1成分および第2成分を含むアンチブロッキング層形成組成物によって形成された層であり、
第1成分は不飽和二重結合含有アクリル共重合体を含み、第2成分は多官能アクリレートを含み、
第1成分のSP値(SP1)および第2成分のSP値(SP2)の差△SPが1~2の範囲内であり、
アンチブロッキング層形成組成物を塗装した後に、第1成分と第2成分が相分離を生じ、表面に微細な凹凸を有するアンチブロッキング層が形成される、
請求項24記載の透明導電性積層体。 - 請求項15~25いずれかに記載の透明導電性積層体を有するタッチパネル。
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104756199B (zh) | 2017-03-01 |
| KR101963475B1 (ko) | 2019-03-28 |
| CN104756199A (zh) | 2015-07-01 |
| US20150055033A1 (en) | 2015-02-26 |
| KR20140140626A (ko) | 2014-12-09 |
| US9886110B2 (en) | 2018-02-06 |
| TW201343389A (zh) | 2013-11-01 |
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