WO2011010551A1 - 光学異方性フィルム、偏光板及び液晶表示装置 - Google Patents
光学異方性フィルム、偏光板及び液晶表示装置 Download PDFInfo
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- WO2011010551A1 WO2011010551A1 PCT/JP2010/061446 JP2010061446W WO2011010551A1 WO 2011010551 A1 WO2011010551 A1 WO 2011010551A1 JP 2010061446 W JP2010061446 W JP 2010061446W WO 2011010551 A1 WO2011010551 A1 WO 2011010551A1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
Definitions
- the present invention relates to an optically anisotropic film, a polarizing plate, and a liquid crystal display device.
- an optical film having optical compensation performance is used to improve optical characteristics such as viewing angle characteristics.
- an optical film an optical film containing a polymerizable liquid crystal compound and having a liquid crystal layer in which the polymerizable liquid crystal compound is aligned and has optical anisotropy is known. And as a method of forming such a liquid crystal layer (also called an optically anisotropic layer), first, the orientation of the polymerizable liquid crystal compound contained in the liquid crystal layer is increased on a transparent film substrate or the like.
- the composition includes a step of applying a composition and orienting the polymerizable liquid crystal compound, and then fixing the orientation to form a liquid crystal layer.
- Patent Document 1 contains a fluorosurfactant and discloses a method for improving the orientation, but the adhesion between the liquid crystal layer surface of the polarizing plate produced from the obtained optical film and the pressure-sensitive adhesive is insufficient, Therefore, there are a problem that the liquid crystal layer surface is peeled off by heating and humidification, and a problem that alignment breakage occurs due to transfer of the surfactant between the liquid crystal coating film and the roll contact portion in the long coating process.
- Patent Document 2 discloses a method for improving coating unevenness containing a silicone-based surfactant, but there is no sufficient effect.
- an object of the present invention is to provide an optically anisotropic film that improves coating unevenness while imparting sufficient liquid crystal orientation of the liquid crystal layer, and has good adhesion between the liquid crystal layer surface and the pressure-sensitive adhesive. Moreover, it is providing the polarizing plate which used such an optical film as a protective film, and a liquid crystal display device provided with the said polarizing plate.
- An optically anisotropic film obtained by laminating a liquid crystal alignment layer and a liquid crystal layer on a film support, wherein the liquid crystal layer contains a fluorine-siloxane graft polymer and a polymerizable liquid crystal compound. .
- fluorine-siloxane graft polymer according to 1 above wherein the fluorine-siloxane graft polymer is a copolymer obtained by reacting a fluorine resin having a radical polymerizable unsaturated bond moiety via a urethane bond and one-end radical polymerizable polysiloxane.
- Optical anisotropic film Optical anisotropic film.
- the polymerizable liquid crystal compound has a rod-like mesogen group in the molecule, and the orientation is fixed after the mesogen group is oriented so that its long axis direction is substantially perpendicular to the surface direction of the film support. 4.
- the optically anisotropic film as described in any one of 1 to 3 above, wherein
- W 1 and W 2 each independently represent a single bond, —O—, —COO— or —OCO—
- Y 1 and Y 2 each independently represent — COO— or —OCO—
- r and s each independently represent an integer of 2 to 18, the 1,4-phenylene group present in the formula is an alkyl group or alkoxy group having 1 to 7 carbon atoms , An alkanoyl group, a cyano group, or a halogen atom may be substituted. 6).
- a polarizing plate comprising the optically anisotropic film according to any one of 1 to 6 on at least one surface of a polarizer.
- a liquid crystal display device comprising the polarizing plate according to 7 above on at least one surface of a liquid crystal cell.
- the present invention it is possible to provide an optically anisotropic film that improves coating unevenness while imparting sufficient liquid crystal orientation of the liquid crystal layer and has good adhesion between the liquid crystal layer surface and the pressure-sensitive adhesive.
- the polarizing plate which used such an optical film as a protective film, and a liquid crystal display device provided with the said polarizing plate can be provided.
- FIG. 1 is a schematic cross-sectional view illustrating an example of an optically anisotropic film 10.
- FIG. It is the schematic which shows the basic composition of the manufacturing apparatus 20 of an optical anisotropic film. It is the schematic which shows the basic composition of the manufacturing apparatus 31 of the resin film by a solution casting method. It is the schematic which shows the basic composition of the manufacturing apparatus 41 of the resin film by a melt casting film forming method.
- the optically anisotropic film of the present invention is an optically anisotropic film obtained by laminating a liquid crystal alignment layer and a liquid crystal layer on a film support, and the liquid crystal layer contains a fluorine-siloxane graft polymer and a polymerizable liquid crystal compound.
- the liquid crystal layer contains a fluorine-siloxane graft polymer and a polymerizable liquid crystal compound.
- An optically anisotropic film includes a film substrate, a liquid crystal alignment layer formed on the film substrate, and a polymerizable liquid crystal compound formed on the liquid crystal alignment layer.
- a liquid crystal layer containing, and the liquid crystal layer further contains a fluorine-siloxane graft polymer.
- the optically anisotropic film is not particularly limited as long as it has the above configuration. Specifically, the optical anisotropic film 10 provided with the layer structure shown in FIG. 1 etc. are mentioned, for example.
- a liquid crystal alignment layer 13 and a liquid crystal layer 14 are laminated on a film substrate 11 and the liquid crystal alignment layer 13. What is a laminated body is mentioned.
- the liquid crystal alignment layer 13 and the liquid crystal layer 14 are shown as the functional layer 12.
- the optically anisotropic film 10 is not limited to the functional layer 12 including only the liquid crystal alignment layer 13 and the liquid crystal layer 14 as shown in FIG. It may be.
- a first intermediate layer 15 may be provided as the functional layer 12 between the liquid crystal alignment layer 13 and the liquid crystal layer 14.
- a second intermediate layer 16 may be provided between the film substrate 11 and the liquid crystal alignment layer 13. Further, both the first intermediate layer 15 and the second intermediate layer 16 may be provided.
- the first intermediate layer 15 include an alignment film, an antistatic layer, and an antiglare layer.
- the second intermediate layer 16 include an antistatic layer, an elution suppressing layer, and an antiglare layer. Etc.
- the thickness of the optical anisotropic film 10 is preferably 20 ⁇ m or more, and more preferably 20 to 80 ⁇ m.
- the thickness here means an average film thickness.
- the film thickness is measured at 20 to 200 locations in the width direction of the film with a contact-type film thickness meter manufactured by Mitutoyo Corporation, and the average value of the measured values is Defined as film thickness.
- the width, physical properties, shape, and the like of the film substrate 11 are not particularly limited, and can be appropriately selected according to the purpose of the optically anisotropic film to be manufactured.
- the width is preferably 1000 to 4000 mm from the viewpoint of use in a large-sized liquid crystal display device, use efficiency of a film during polarizing plate processing, and production efficiency.
- the optically anisotropic film 10 preferably has an in-plane retardation Ro determined by the following formula (1) of 0 to 330 nm. Further, the thickness direction retardation Rt determined by the following formula (2) is preferably ⁇ 150 to 150 nm.
- nx represents the refractive index in the slow axis direction in the plane of the film
- ny represents the refractive index in the direction perpendicular to the slow axis in the plane of the film
- nz represents the thickness direction of the film.
- Refractive index is shown
- d shows the thickness (nm) of a film.
- Each refractive index can be measured at a wavelength of 590 nm in an environment of a temperature of 23 ° C. and a relative humidity of 55% RH using, for example, KOBRA-21ADH manufactured by Oji Scientific Instruments.
- the liquid crystal layer of the optically anisotropic film contains a fluorine-siloxane graft polymer.
- Fluorine-siloxane graft polymer refers to a polymer obtained by copolymerizing polysiloxane or organopolysiloxane containing siloxane or organosiloxane alone to at least a fluorine-based resin by grafting. It is a compound shown in.
- fluorine-siloxane graft polymer examples include (A) an organic solvent-soluble fluororesin having a radically polymerizable unsaturated bond moiety via a urethane bond [hereinafter also referred to as radically polymerizable fluororesin (A)], (B) One-end radical polymerizable polysiloxane represented by the following general formula (1) and / or one-end radical polymerizable polysiloxane represented by the following general formula (2), and (C) radical polymerization reaction under the conditions of radical polymerization reaction And a compound formed by graft copolymerization obtained by copolymerizing a polymerizable fluororesin (A) and a radically polymerizable monomer that does not react other than a polymerization reaction by a double bond.
- A an organic solvent-soluble fluororesin having a radically polymerizable unsaturated bond moiety via a urethane bond
- A One-end radical polymerizable polysi
- R 1 is a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, such as an alkyl group (methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, etc.), aryl group ( For example, a phenyl group), a cycloalkyl group (for example, a cyclohexyl group), etc. can be mentioned.
- R 1 is preferably a hydrogen atom or a methyl group.
- R 2 , R 3 , R 4 , R 5 , and R 6 are hydrogen atoms or hydrocarbon groups having 1 to 10 carbon atoms, which may be the same as or different from each other, and R 2 , R 3 , R 4 , and R 5 is preferably each independently a methyl group or a phenyl group, and R 6 is preferably a methyl group, a butyl group or a phenyl group.
- N is an integer of 2 or more, preferably an integer of 10 or more, more preferably an integer of 30 or more.
- R 7 is a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, preferably a hydrogen atom or a methyl group.
- R 8 , R 9 , R 10 , R 11 , and R 12 are hydrogen atoms or hydrocarbon groups having 1 to 10 carbon atoms, which may be the same as or different from each other, and R 8 , R 9 , R 10 , And R 11 are each independently preferably a methyl group or a phenyl group, and R 12 is preferably a methyl group, a butyl group, or a phenyl group.
- p is an integer of 0 to 10, preferably an integer of 10 or more, more preferably an integer of 30 or more.
- q is an integer of 2 or more.
- the radical polymerizable fluororesin (A) can be obtained by reacting an organic solvent-soluble fluororesin (A-1) having a hydroxyl group with a radical polymerizable monomer (A-2) having an isocyanate group.
- the organic solvent-soluble fluororesin having a hydroxyl group (A-1) is not particularly limited as long as it contains at least a hydroxyl group-containing monomer portion and a polyfluoroparaffin portion as its constituent components.
- the repeating unit includes a repeating unit represented by the following general formula (3) and a repeating unit represented by the following general formula (4).
- R 21 and R 22 may be the same or different independently for each repeating unit, and may be a hydrogen atom, a halogen atom (for example, a fluorine atom or a chlorine atom), a C 1-10 carbon atom.
- Number of carbon atoms substituted with one or more alkyl groups for example, methyl or ethyl groups
- aryl groups having 6 to 8 carbon atoms for example, phenyl groups
- halogen atoms for example, fluorine atoms or chlorine atoms
- 1 to 10 alkyl groups for example, trifluoromethyl group, 2,2,2-trifluoroethyl group, or trichloromethyl group
- halogen atoms for example, fluorine atoms or chlorine atoms
- x is an integer of 2 or more.
- each R 23 independently represents a hydrogen atom, a halogen atom (eg, a fluorine atom or a chlorine atom), an alkyl group having 1 to 10 carbon atoms (eg, a methyl group or an ethyl group), carbon, An aryl group having 6 to 8 carbon atoms (for example, a phenyl group), an alkyl group having 1 to 10 carbon atoms substituted with one or more halogen atoms (for example, fluorine or chlorine atoms) (for example, a trifluoromethyl group, 2,2,2-trifluoroethyl group, or trichloromethyl group), or an aryl group having 6 to 8 carbon atoms (eg, pentane) substituted with one or more halogen atoms (eg, fluorine atom or chlorine atom)
- R 24 is a divalent group selected from OR 25a group, CH 2 OR 25b group, and COOR 25c group independently for each repeating unit.
- R 25a , R 25b , and R 25c are each an alkylene group having 1 to 10 carbon atoms (for example, a methylene group, an ethylene group, a trimethylene group, a tetramethylene group, or a hexamethylene group), a cyclohexane having 6 to 10 carbon atoms.
- An alkylene group for example, cyclohexylene group
- an alkylidene group having 2 to 10 carbon atoms for example, isopropylidene group
- y is an integer of 2 or more.
- organic solvent-soluble fluororesin (A-1) having a hydroxyl group can optionally contain a repeating unit represented by the following general formula (5) as other constituent components.
- R 26 is independently a hydrogen atom, a halogen atom (eg, a fluorine atom or a chlorine atom), or an alkyl group having 1 to 10 carbon atoms (eg, a methyl group or an ethyl group) independently for each repeating unit.
- a halogen atom eg, a fluorine atom or a chlorine atom
- an alkyl group having 1 to 10 carbon atoms eg, a methyl group or an ethyl group
- An aryl group having 6 to 10 carbon atoms for example, a phenyl group
- an alkyl group having 1 to 10 carbon atoms substituted with one or more halogen atoms for example, fluorine atoms or chlorine atoms
- one or more halogen atoms for example, fluorine atoms or chlorine atoms
- R 27 is independently in each repeat unit, an oR 28a group or OCOR 28b group
- R 28a and R 28b are hydrogen atoms
- a halogen atom for example, a fluorine atom or a chlorine atom
- an alkyl group having 1 to 10 carbon atoms for example, a methyl group or an alkyl group having 1 to 10 carbon atoms substituted with one or more halogen atoms (for example, fluorine atom or chlorine atom) (for example, trifluoromethyl) Group, 2,2,2-trifluoroethyl group, or trichloromethyl group)
- R 27 is
- the solubility in an organic solvent is improved.
- the hydroxyl value of the organic solvent-soluble fluororesin (A-1) having a hydroxyl group is preferably 5 to 250, more preferably 10 to 200, and even more preferably 20 to 150.
- the hydroxyl value is less than 5, the introduction amount of the radical polymerizable monomer (A-2) having an isocyanate group is remarkably reduced, so that the reaction mixture tends to become cloudy.
- the hydroxyl value exceeds 250, the compatibility with the below-mentioned one-terminal radical polymerizable polysiloxane [component (B)] is deteriorated, and graft copolymerization may not proceed.
- the organic solvent-soluble fluororesin (A-1) having a hydroxyl group may have a free carboxylic acid group.
- the organic solvent-soluble fluororesin (A-1) having a hydroxyl group can be prepared by a known method or a commercially available product can be used.
- Commercially available products include vinyl ether fluoropolymers (Lumiflon LF-100, LF-200, LF-302, LF-400, LF-554, LF-600, LF-986N; manufactured by Asahi Glass Co., Ltd.), allyl ether fluoropolymers (Cefal Coat PX-40, A606X, A202B, CF-803; manufactured by Central Glass Co., Ltd.), vinyl carboxylate / acrylic ester fluoropolymer (Zaflon FC-110, FC-220, FC-250, FC-275, FC) -310, FC-575, XFC-973; manufactured by Toagosei Co., Ltd.), or vinyl ether / vinyl carboxylate fluororesin (Fluonate; manufactured by DIC Corporation).
- the organic solvent-soluble fluororesin (A-1) having a hydroxyl group can be used alone or in combination of two or more.
- the radically polymerizable monomer (A-2) having an isocyanate group is not particularly limited as long as it is a monomer containing an isocyanate group and a radically polymerizable moiety, but has an isocyanate group. It is preferable to use a radical polymer monomer having no other functional group (for example, a hydroxyl group or a polysiloxane chain).
- Suitable radical polymerizable monomers (A-2) having an isocyanate group include, for example, radical polymerizable monomers represented by the following general formula (6), or radicals represented by the following general formula (7). It is preferable to use a polymerizable monomer.
- R 36 represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, for example, an alkyl group having 1 to 10 carbon atoms (for example, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, or A hexyl group), an aryl group having 6 to 10 carbon atoms (for example, a phenyl group), or a cycloalkyl group having 3 to 10 carbon atoms (for example, a cyclohexyl group, and R 37 is an oxygen atom or a carbon atom having 1 to 10 linear or branched divalent hydrocarbon group), for example, an alkylene group having 1 to 10 carbon atoms (eg, methylene group, ethylene group, trimethylene group, or tetramethylene group), 2 to 2 carbon atoms 10 alkylidene groups (for example, isopropylidene group), arylene groups having 6 to
- R 41 represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, such as an alkyl group having 1 to 10 carbon atoms (for example, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, or A hexyl group), an aryl group having 6 to 10 carbon atoms (for example, a phenyl group), or a cycloalkyl group having 3 to 10 carbon atoms (for example, a cyclohexyl group), and R 42 represents an oxygen atom or 1 to 10 linear or branched divalent hydrocarbon group), for example, an alkylene group having 1 to 10 carbon atoms (eg, methylene group, ethylene group, trimethylene group, or tetramethylene group), 2 to 2 carbon atoms 10 alkylidene groups (for example, isopropylidene group), arylene groups having 6 to 10 carbon atoms (for example,
- radical polymerizable monomer (A-2) examples include methacryloyl isocyanate, 2-isocyanatoethyl methacrylate, m- or p-isopropenyl- ⁇ , ⁇ -dimethylbenzyl isocyanate, and the like.
- a radical having an isocyanate group is used.
- the amount of the polymerizable monomer (A-2) is preferably 0.001 mol or more and less than 0.1 mol, more preferably 0, per equivalent of hydroxyl group of the organic solvent-soluble fluororesin (A-1) having a hydroxyl group.
- the reaction is carried out in an amount of 0.01 mol or more and less than 0.08 mol.
- the amount of the isocyanate group-containing radical polymerizable monomer (A-2) is less than 0.001 mol, graft copolymerization becomes difficult, the reaction mixture becomes cloudy, and the two layers are separated with time. Moreover, when it is 0.1 mol or more, gelation tends to occur during graft copolymerization, which is not preferable.
- the reaction between the organic solvent-soluble fluororesin having a hydroxyl group (A-1) and the radical polymerizable monomer having an isocyanate group (A-2) is carried out at room temperature to 80 ° C. in the absence of a catalyst or in the presence of a catalyst. Can do.
- the radical polymerizable fluororesin (A) thus obtained is used in the range of 2 to 70% by mass, preferably 4 to 60% by mass, based on the total amount of the fluorine-siloxane graft polymer used.
- the radical polymerizable fluororesin (A) is less than 2% by mass based on the total amount of the fluorine-siloxane graft polymer used, the stability during graft polymerization may be reduced. Gelation may occur during polymerization.
- one-end radical polymerizable polysiloxane (B) examples include Silaplane FM-0711 (number average molecular weight 1,000, manufactured by Chisso Corporation), Silaplane FM-0721 (number average molecular weight 5,000, Chisso Corporation), Silaplane FM-0725 (number average molecular weight 10,000, manufactured by Chisso Corporation), X-22-174DX (number average molecular weight 4,600, manufactured by Shin-Etsu Chemical Co., Ltd.), etc. it can.
- Silaplane FM-0711 number average molecular weight 1,000, manufactured by Chisso Corporation
- Silaplane FM-0721 number average molecular weight 5,000, Chisso Corporation
- Silaplane FM-0725 number average molecular weight 10,000, manufactured by Chisso Corporation
- X-22-174DX numberber average molecular weight 4,600, manufactured by Shin-Etsu Chemical Co., Ltd.
- the one-end radical polymerizable polysiloxane (B) is a single-end radical polymerizable polysiloxane represented by the general formula (1), or a mixture of two or more kinds, or the general formula (2).
- the one-end radical-polymerizable polysiloxane can be used alone or as a mixture of two or more kinds.
- one or more of the one-end-radical-polymerizable polysiloxanes represented by the general formula (1) can be used.
- one or more of the one-terminal radically polymerizable polysiloxanes represented by the general formula (2) can be used in combination.
- These one-terminal radically polymerizable polysiloxane (B) is used in an amount of 4 to 40% by mass, preferably 10 to 30% by mass, based on the total amount of the fluorine-siloxane graft polymer. If the one-terminal radical polymerizable polysiloxane (B) is less than 4% by mass relative to the total amount of the fluorine-siloxane graft polymer, the slipping property may be insufficient. If it exceeds 40% by mass, Unreacted monomer components increase, which may lead to undesirable situations such as softening of the coating film and bleeding of unreacted monomer components.
- radical polymerizable monomer (C) that does not react with the radical polymerizable fluororesin (A) other than the polymerization reaction by a double bond under the radical polymerization reaction conditions will be described.
- radical polymerizable monomer (C) that does not react with the radical polymerizable fluororesin (A) other than the polymerization reaction by a double bond under the radical polymerization reaction conditions include, for example, styrene, p-methylstyrene, p-chloro.
- Styrenic monomers such as methylstyrene or vinyltoluene; methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, i-propyl (meth) acrylate, n-butyl (methacrylate, i -Butyl (meth) acrylate, tert-butyl (meth) acrylate, n-hexyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, isobornyl (Meta) acryle , (Meth) acrylate monomers having hydrocarbon groups such as adamantyl (meth) acrylate, phenyl (meth) acrylate, or benzyl (meth) acrylate;
- the radical polymerizable monomer (C) that does not react other than the polymerization reaction with the radical polymerizable fluororesin (A) under the radical polymerization reaction conditions may be used alone or in combination of two or more. From the viewpoint of copolymerization, a (meth) acrylate monomer is preferably used.
- the radical polymerizable monomer (C) that does not react with the radical polymerizable fluororesin (A) except for the polymerization reaction by a double bond under the radical polymerization reaction conditions is 15 to 94% by mass based on the total amount of the fluorine-siloxane graft polymer. Preferably, it is used in the range of 30 to 70% by mass. If it is less than 15% by mass, it is difficult to adjust the glass transition point of the copolymer, and if it exceeds 94% by mass, the slipperiness becomes insufficient.
- fluorine-siloxane graft polymer examples include (A) an organic solvent-soluble fluororesin having a radically polymerizable unsaturated bond moiety via a urethane bond, (B) the general formula (1) and / or the general formula (2). ) One-end radical polymerizable polysiloxane represented by (), (D) one-end radical polymerizable alkoxy polyalkylene glycol represented by the following general formula (8), and (E): components (A), (B), ( It can also be produced from graft copolymerization obtained by random copolymerization of radically polymerizable monomers other than D).
- R 13 is a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, preferably a hydrogen atom or a methyl group.
- R 14 is a hydrocarbon group having 1 to 10 carbon atoms, preferably a methyl group.
- R 15 is a hydrocarbon group which may be substituted with a linear or branched halogen atom having 1 to 10 carbon atoms, preferably an alkyl group (for example, a methyl group, an ethyl group, a propyl group, a butyl group). ), A phenyl group, or an alkyl-substituted phenyl group.
- l is an integer of 1 or more, preferably an integer of 2 to 100.
- M is an arbitrary integer, preferably 0 to 10, and more preferably 0.
- radical-polymerizable fluororesin (A) and the one-end radical-polymerizable polysiloxane (B) represented by the general formula (1) or the general formula (2) are as described above.
- the polyalkylene glycol (D) will be described.
- the one-end radical polymerizable alkoxy polyalkylene glycol (D) a known one can be used. Specifically, BLEMMER PME-100, PME-200, PME-400, PME-4000, 50POEP-800B (manufactured by NOF Corporation), LIGHT ESTER MC, MTG, 130MA, 041MA (manufactured by Kyoeisha Chemical Co., Ltd.), Light acrylate BO-A, EC-A, MTG-A, 130A (manufactured by Kyoeisha Chemical Co., Ltd.) and the like can be mentioned.
- the single-end radical polymerizable alkoxy polyalkylene glycol (D) can be used alone or in combination of two or more.
- the one-end radical polymerizable alkoxypolyalkylene glycol (D) is used in an amount of 1 to 25% by mass, preferably 1 to 15% by mass, based on the total amount of the fluorine-siloxane graft polymer.
- the stain resistance may be insufficient if the one-terminal radical polymerizable alkoxy polyalkylene glycol (D) is less than 1% by mass or exceeds 25% by mass with respect to the total amount of the fluorine-siloxane graft polymer, the stain resistance may be insufficient.
- radical polymerizable monomer (E) other than the components (A), (B), and (D) will be described.
- examples of the radical polymerizable monomer (E) other than the components (A), (B), and (D) include styrene-based monomers such as styrene, p-methylstyrene, p-chloromethylstyrene, and vinyltoluene.
- (Meth) acrylate monomers vinyl ester monomers such as vinyl acetate, vinyl benzoate, or vinyl ester of branched monocarboxylic acid (Beova: Shell Chemical Co., Ltd.); acrylonitrile, or methacrylonitrile Acrylonitrile monomers such as; vinyl ether monomers such as ethyl vinyl ether, n-butyl vinyl ether, i-butyl vinyl ether, or cyclohexyl vinyl ether; acrylamides such as (meth) acrylamide, dimethyl (meth) acrylamide, or diacetone acrylamide Monomer: vinyl pyri N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl (meth) acrylate, N, N-dimethyl (meth) acrylamide, 4- (N, N-dimethylamino) styrene, or N- ⁇ 2- (meth) acryloy
- These monomers may be used alone or in admixture of two or more, and (meth) acrylates are preferably used mainly from the viewpoint of copolymerization.
- the radical polymerizable monomer (E) other than the components (A), (B), and (D) is 28 to 92% by mass, preferably 30 to 70% by mass, based on the total amount of the fluorine-siloxane graft polymer used. Used in a range.
- radical polymerizable monomer (E) is less than 28% by mass relative to the total amount of the fluorine-siloxane graft polymer used, it is difficult to adjust the glass transition point of the copolymer, and if it exceeds 92% by mass, The slipperiness becomes insufficient.
- the ratio of the used mass of the radical polymerizable fluororesin (A) to the total used mass (ie, A / (B + D + E); hereinafter sometimes referred to as “fluororesin / acryl ratio”) is 2/1 to 1 / A range of 50 is preferred.
- the fluororesin / acryl ratio exceeds 2/1, the gloss may decrease. Further, when the fluororesin / acryl ratio is less than 1/50, the stability may be lowered.
- any known polymerization method can be used. Among them, a solution radical polymerization method or a non-aqueous dispersion radical polymerization method can be used. Is the most convenient and particularly preferred.
- the fluorine-siloxane graft polymer includes (A) an organic solvent-soluble fluororesin having a radical polymerizable unsaturated bond moiety via a urethane bond, (B) the above general formula (1): and / or the above general formula (2). And (F) a radically polymerizable monomer having one radical polymerizable double bond and at least one fluoroalkyl group in the molecule, and (G) a component (A), (B), and can be produced from a graft copolymer obtained by copolymerizing a radical polymerizable monomer other than (F).
- radical-polymerizable fluororesin (A) and the one-end radical-polymerizable polysiloxane (B) represented by the general formula (1) or the general formula (2) are as described above.
- the radical polymerizable monomer (F) having a radical polymerizable double bond and at least one fluoroalkyl group will be described.
- the radical polymerizable monomer (F) having one radical polymerizable double bond and at least one fluoroalkyl group in the molecule is, for example, perfluorobutylethylene, perfluorohexylethylene, perfluorooctylethylene, Perfluorodecylethylene, 1-methoxy- (perfluoro-2-methyl-1-propene), 2,2,2-trifluoroethyl (meth) acrylate, 2,2,3,3,3-pentafluoropropyl ( (Meth) acrylate, 2- (perfluorobutyl) ethyl (meth) acrylate, 3-perfluorobutyl-2-hydroxypropyl (meth) acrylate, 2- (perfluorohexyl) ethyl (meth) acrylate, 3-perfluorohexyl -2-hydroxypropyl (meth) acrylate, 2- (par Fluorooctyl) ethyl (me
- the radical polymerizable monomer (F) having one radical polymerizable double bond and at least one fluoroalkyl group in the molecule may be used alone or in combination of two or more.
- the radical polymerizable monomer (F) having one radical polymerizable double bond and at least one fluoroalkyl group in the molecule is 1 to 50 mass based on the total amount of the fluorine-siloxane graft polymer used. %, Preferably in the range of 2 to 40% by weight. If the amount is less than 1% by mass, the stability may be insufficient. If the amount exceeds 50% by mass, the price of the copolymer increases, which is not practical.
- the radical polymerizable monomer (G) other than the components (A), (B), and (F) will be described.
- the radical polymerizable monomer (G) other than the components (A), (B), and (F) is, for example, a styrene-based monomer such as styrene, p-methylstyrene, p-chloromethylstyrene, or vinyltoluene.
- Body methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, i-propyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, tert-butyl ( (Meth) acrylate, n-hexyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, isobornyl (meth) acrylate, adamantyl (meth) acrylate, Phenyl (meth) acrylate, Is a (meth) acrylate monomer having a hydrocarbon group such as benzyl (meth) acrylate; vinyl ester such as vinyl acetate, vinyl benzoate, or
- Adducts hydroxyalkyl esters of the above ⁇ , ⁇ -ethylenically unsaturated carboxylic acid, or the above ⁇ , ⁇ -ethylenically unsaturated carboxylic acid and butyl glycidyl ether, phenyl glycidyl ether, branched carboxylic acid glycidyl ester
- Mosquito Hydroxyl-containing vinyl compound monomers such as adducts with epoxy compounds such as Jurass E; manufactured by Shell Chemical Co .
- the radically polymerizable monomers (G) other than the components (A), (B), and (F) may be used alone or in admixture of two or more, mainly from the viewpoints of copolymerizability and yellowing resistance.
- To (meth) acrylates are preferably used.
- the component (G) is used in the range of 4 to 93% by mass, preferably 20 to 80% by mass, based on the total amount of the fluorine-siloxane graft polymer used. If it is less than 4% by mass, it is difficult to adjust the glass transition point of the copolymer, and if it exceeds 93% by mass, the stain resistance is insufficient.
- Ratio of used mass of component (A) to total used mass of component (B), component (F), and component (G) ie, A / (B + F + G); hereinafter referred to as “fluororesin / acrylic ratio”
- fluororesin / acrylic ratio Is preferably in the range of 2/1 to 1/50.
- the fluororesin / acryl ratio exceeds 2/1, the gloss may decrease. Further, when the fluororesin / acryl ratio is less than 1/50, the water repellency and oil repellency may be lowered.
- a known polymerization method can be used, among which a solution radical polymerization method or a non-aqueous dispersion radical is used.
- the polymerization method is the simplest and is particularly recommended.
- solvent used for the above polymerization examples include aromatic hydrocarbon compounds such as toluene, xylene, or a mixture of aromatic hydrocarbons (Sorvesso 100, manufactured by Esso Petroleum Corporation); n-hexane, cyclohexane, octane, Aliphatic and alicyclic hydrocarbon compounds such as mineral spirits or kerosene; ester compounds such as ethyl acetate, n-butyl acetate, i-butyl acetate or butyl cellosolve acetate; methanol, ethanol, n-propanol, i- Examples thereof include alcohol compounds such as propanol, n-butanol, i-butanol, ethylene glycol, propylene glycol, ethyl cellosolve, and butyl cellosolve. These solvents can be used alone or in combination of two or more. .
- aromatic hydrocarbon compounds such as toluene, xylene
- the synthesis can be carried out by a conventional method using various radical polymerization initiators, for example, azo compounds or peroxide radical polymerization initiators.
- the polymerization time is not particularly limited, but a range of 1 to 48 hours is usually selected.
- the polymerization temperature is usually 30 to 120 ° C, preferably 60 to 100 ° C.
- the polymerization can be carried out by adding a known chain transfer agent such as butyl mercaptan, dodecyl mercaptan, or ⁇ -methylstyrene dimer, if necessary.
- the molecular weight of the graft polymer is not particularly limited, but the mass average molecular weight is preferably in the range of about 5,000 to 2,000,000 (more preferably about 10,000 to 1,000,000) by GPC (gel permeation chromatography) in terms of polystyrene. It is.
- the weight average molecular weight of the graft polymer is less than 5,000, the film-forming property may be deteriorated, and if it exceeds 2,000,000, there is a risk of gelation during polymerization.
- examples of commercially available fluorine-siloxane graft polymers include ZX-022H, ZX-007C, ZX-049, and ZX-047-D manufactured by Fuji Chemical Industry Co., Ltd.
- the fluorine-siloxane graft polymer is preferably contained in an amount of 0.01 to 1% by weight, more preferably 0.1 to 0.8% by weight, based on the liquid crystal material. If the amount is less than 0.01% by mass, the effect of eliminating coating unevenness does not appear and alignment defects increase, and if it exceeds 1% by mass, roll transferability deteriorates.
- the liquid crystal layer 14 contains a polymerizable liquid crystal compound in addition to the fluorine-siloxane graft polymer. It does not specifically limit as a polymerizable liquid crystal compound, The conventionally well-known polymerizable liquid crystal compound etc. which are contained in a liquid crystal layer are mentioned.
- those having a rod-like mesogen group or a disk-like mesogen group in the molecule can be mentioned.
- those having a rod-like mesogenic group in the molecule are preferable.
- said polymeric liquid crystal compound it can align so that the major axis direction of the molecule
- the liquid crystal layer 14 contains, for example, a polymerizable liquid crystal compound having a rod-shaped mesogen group in the molecule, and the major axis direction of the liquid crystal layer 14 is substantially perpendicular to the surface direction of the transparent film substrate. It is preferable that the orientation is fixed after orientation (vertical orientation).
- the vertical alignment means that the tilt angle, which is the angle of the major axis direction of the mesogenic group (the alignment direction of the polymerizable liquid crystal compound), with respect to the thickness direction of the film substrate is 70 to 90 °. And is preferably 80 to 90 °. Further, it is known that whether or not the polymerizable liquid crystal compound is vertically aligned depends on the structure of the polymerizable liquid crystal compound, particularly its rod-shaped mesogen group. That is, any polymerizable liquid crystal compound having a vertically aligned structure can be vertically aligned by a known alignment process.
- the polymerizable liquid crystal compound having a rod-shaped mesogen group in the molecule may be a polymerizable liquid crystal containing the rod-shaped mesogen group and a polymerizable functional group, and at least any of the main chain and the side chain.
- it may be a polymer liquid crystal containing the rod-shaped mesogen group or a polymer liquid crystal containing the rod-shaped mesogen group and a polymerizable functional group.
- the polymerizable functional group at the time of immobilization, for example, after cooling to less than the liquid crystal transition temperature, it is possible to further immobilize the orientation by polymerizing while cooling, This is preferable because it can be cured as an optically anisotropic layer.
- a polymerizable liquid crystal is preferable.
- the mesogenic group is not particularly limited, but is preferably a rod-like mesogenic group that can be vertically aligned. Specific examples include functional groups containing an ester group, a cyano group, an alkyl group, and an aryl group. Moreover, as said mesogenic group, 1 type of each said mesogenic group may be contained, and it may contain combining 2 or more types.
- the polymerizable functional group is not particularly limited, and it is preferable that polymerization can be performed while maintaining the orientation after the orientation.
- the polymerization may be initiated by heat, or the polymerization may be initiated by irradiation with active rays such as ultraviolet rays. That is, in the case of the polymerizable liquid crystal, it may be thermosetting or actinic ray curable.
- the polymerizable liquid crystal compound is polymerized at a temperature lower than the liquid crystal transition temperature, it is preferable that the polymerizable liquid crystal compound is not heated so much that an actinic ray curable one is more preferable.
- the polymerizable functional group examples include a vinyl group such as acryloyl group, methacryloyl group and vinyl ether, an epoxy group, and an oxetanyl group.
- the said polymerizable functional group may be used independently and may be used in combination of 2 or more type.
- the polymerizable liquid crystal may contain one polymerizable functional group in the molecule, or may contain two or more.
- the polymerizable functional group examples include an acryloyl group, a vinyl group such as methacryloyl group and vinyl ether, and an epoxy group.
- the said polymerizable functional group may be used independently and may be used in combination of 2 or more type.
- the polymerizable liquid crystal may contain one polymerizable functional group in the molecule, or may contain two or more.
- the polymerizable liquid crystal compound is particularly preferably a compound represented by the following general formula (L).
- m 0 or 1
- W 1 and W 2 each independently represent a single bond, —O—, —COO— or —OCO—
- Y 1 and Y 2 each independently represent —COO.
- -Or -OCO- wherein r and s each independently represent an integer of 2 to 18, the 1,4-phenylene group present in the formula is an alkyl group having 1 to 7 carbon atoms, an alkoxy group, One or more alkanoyl groups, cyano groups, or halogen atoms may be substituted.
- a polymerizable liquid crystal compound having the polymerizable functional group in addition to the polymerizable liquid crystal compound, for example, a polymerizable liquid crystal compound having the polymerizable functional group is used.
- a photoinitiator In the case of polymerization by irradiation with an electron beam, a photopolymerization initiator is not required.
- polymerization generally used for example, polymerization by ultraviolet (UV) irradiation, the polymerization is promoted. Therefore, it is preferable to contain a photopolymerization initiator. By doing so, polymerization temperature can be made low and the said fixation can be performed suitably.
- the photopolymerization initiator is not particularly limited. Specifically, for example, benzyl (bibenzoyl), benzoin isobutyl ether, benzoin isopropyl ether, benzophenone, benzoylbenzoic acid, benzoylmethyl benzoate, 4-benzoyl-4 ′ -Methyldiphenyl sulfide, benzylmethyl ketal, dimethylaminomethylbenzoate, 2-n-butoxyethyl-4-dimethylaminobenzoate, isoamyl p-dimethylaminobenzoate, 3,3'-dimethyl-4-methoxybenzophenone, methylobenzoyl Formate, 2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butane-1 -Oh 1- (4-dodecylphen
- the content of the photopolymerization initiator is preferably 0.01 to 20% by mass, more preferably 0.1 to 10% by mass, and further preferably 0.5 to 5% by mass. preferable. If the content of the photopolymerization initiator is too small, the effect of the photopolymerization initiator tends not to be exhibited. If the content is too large, the polymerizability of the polymerizable liquid crystal compound is lowered and the molecular weight is lowered. There exists a tendency for abrasion resistance etc. to fall.
- the liquid crystal layer forming composition may contain a sensitizer as long as the object of the present invention is not impaired. Although it does not specifically limit as said sensitizer, Specifically, Nippon Kayaku Co., Ltd. Kayacure DETX etc. are mentioned, for example.
- a method of preparing a liquid liquid crystal layer forming composition containing a solvent and coating the liquid crystal layer forming composition on the liquid crystal alignment layer is preferable. As a result, it is possible to more effectively utilize the effect of suppressing the occurrence of coating unevenness due to the fluorine-siloxane graft polymer contained in the liquid crystal layer.
- the solvent for the liquid crystal layer forming composition is not particularly limited as long as the polymerizable liquid crystal compound can be dissolved. Moreover, it is preferable that it is a solvent which does not change the property etc. of a transparent film base material.
- hydrocarbons such as benzene, toluene, xylene, n-butylbenzene, diethylbenzene, and tetralin; ethers such as methoxybenzene, 1,2-dimethoxybenzene, and diethylene glycol dimethyl ether; acetone, methyl ethyl ketone, Ketones such as methyl isobutyl ketone, cyclohexanone, and 2,4-pentanedione; esters such as ethyl acetate, ethylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, and ⁇ -butyrol
- solvents for example, hydrocarbon solvents, glycol monoether acetate solvents and the like are preferable as the solvent used alone.
- solvents for example, hydrocarbon solvents, glycol monoether acetate solvents and the like are preferable as the solvent used alone.
- a combination of the solvent used in combination of 2 or more types a combination of ethers or ketones and glycols and the like can be mentioned.
- the solid content concentration of the composition for forming a liquid crystal layer varies depending on the solubility of the polymerizable liquid crystal compound or the like, the film thickness of the liquid crystal layer to be produced, and the like.
- the mass is preferably 3% by mass, and more preferably 3 to 40% by mass.
- the following additive may be contained in the liquid crystal layer forming composition within the range not impairing the object of the present invention, in addition to the above-mentioned compositions.
- the content of the additive is selected within a range that does not impair the object of the present invention, and is generally preferably 40% by mass or less of the composition for forming a liquid crystal layer, and 20% by mass or less. It is preferable that
- composition for forming a liquid crystal layer containing a solvent may contain a surfactant other than the fluorine-siloxane graft polymer according to the present invention.
- a surfactant other than the fluorine-siloxane graft polymer according to the present invention.
- cationic surfactants such as imidazoline, quaternary ammonium salts, alkylamine oxides, polyamine derivatives; polyoxyethylene-polyoxypropylene condensates, primary or secondary alcohol ethoxylates , Alkylphenol ethoxylates, polyethylene glycol and its esters, sodium lauryl sulfate, ammonium lauryl sulfate, lauryl sulfate amines, alkyl-substituted aromatic sulfonates, alkyl phosphates, aliphatic or aromatic sulfonate formalin condensates, etc.
- amphoteric surfactants such as laurylamidopropylbetaine and laurylaminoacetic acid betaine
- nonionic surfactants such as polyethylene glycol fatty acid esters and polyoxyethylene alkylamine And the like.
- the content of the surfactant may be appropriately selected within a range not impairing the effect of the fluorine-siloxane graft polymer according to the present invention.
- the thickness of the liquid crystal layer 14 is preferably 0.1 to 10 ⁇ m, and more preferably 0.2 to 5 ⁇ m.
- the liquid crystal layer 14 preferably has an in-plane retardation Ro determined by the above formula (1) of 0 to 10 nm. Further, the thickness direction retardation Rt determined by the above formula (2) is preferably ⁇ 500 to ⁇ 100 nm.
- the liquid crystal alignment layer 13 that enhances the alignment of the polymerizable liquid crystal compound is provided on the film substrate 11 or on the second intermediate layer 16 when the second intermediate layer 16 is provided. It is formed.
- the liquid crystal alignment layer 13 may include, for example, a resin such as an actinic radiation curable resin and may be subjected to a rubbing process, or may include a resin such as an actinic radiation curable resin and the vertical alignment agent. May be.
- the actinic radiation curable resin may be any resin that can be cured by actinic radiation such as ultraviolet rays.
- actinic radiation such as ultraviolet rays.
- vinyl group, allyl group, acryloyl group, methacryloyl group, isopropenyl group, epoxy group, and oxetanyl are used.
- those having a polymerizable functional group such as a group.
- the liquid crystal alignment layer according to the present invention preferably contains an acrylic polymer.
- the actinic radiation curable resin those having two or more polymerizable functional groups and having a crosslinked structure or a network structure when irradiated with actinic radiation are also preferable.
- the active ray is preferably ultraviolet rays from the viewpoint of workability. That is, the actinic radiation curable resin is preferably an ultraviolet curable resin.
- the liquid crystal alignment layer 13 contains not only the actinic radiation curable resin but also a cellulose ester resin, which indicates the adhesion between the upper layer of the liquid crystal alignment layer 13 and the lower layer of the liquid crystal alignment layer 13, specifically In particular, the adhesion with the liquid crystal layer 14 and the adhesion with the film substrate 11 can be enhanced, and in particular, the adhesion under high temperature and high humidity can be enhanced.
- the content is preferably 1 to 10 parts by mass with respect to 100 parts by mass of the actinic radiation curable resin.
- the cellulose-ester resin etc. which comprise a transparent film base material are mentioned. Specifically, what is illustrated below is mentioned as a cellulose-ester resin of a transparent film base material, for example.
- the thickness of the liquid crystal alignment layer 13 is preferably 1.2 to 3 ⁇ m. If it is too thin, there is a tendency that the effect of promoting the alignment of the polymerizable liquid crystal compound in the liquid crystal layer 14 and the effect of improving the adhesion as described above are difficult to be exhibited. Furthermore, the effect of preventing the components of the film substrate 11 from eluting into the liquid crystal layer 14 also tends to be reduced. On the other hand, if it is too thick, the resulting optically anisotropic film becomes unnecessarily thick and tends to hinder the thinning of the optically anisotropic film.
- the film substrate 11 is not particularly limited as long as it is transparent and can be used as a substrate for an optically anisotropic film.
- being transparent means that the transmittance of visible light is 60% or more, preferably 80% or more, and more preferably 90% or more.
- Specific examples of the film substrate 11 include a resin film having high transparency.
- the resin for the resin film include polyester resins such as cellulose ester resin, polyester resin, polycarbonate resin, polyarylate resin, polysulfone resin, polyethersulfone resin, polyethylene terephthalate resin, and polyethylene naphthalate resin.
- polyester resins such as cellulose ester resin, polyester resin, polycarbonate resin, polyarylate resin, polysulfone resin, polyethersulfone resin, polyethylene terephthalate resin, and polyethylene naphthalate resin.
- a cellulose ester film containing a cellulose ester resin is preferable.
- the resin film may contain a plasticizer and fine particles.
- the ultraviolet absorber may contain in the range which does not inhibit the hardening of the resin composition which is the raw material. The manufacturing method of the resin film which is such a film base material is mentioned later.
- the thickness of the film base 11 is preferably thinner in order to reduce the thickness of the optically anisotropic film, but is preferably 20 ⁇ m or more in order to prevent breakage during production.
- the thickness here means an average film thickness.
- the film thickness is measured at 20 to 200 locations in the width direction of the film with a contact-type film thickness meter manufactured by Mitutoyo Corporation, and the average value of the measured values is Defined as film thickness.
- the width, physical properties, shape, and the like of the film substrate 11 are not particularly limited, and can be appropriately selected according to the purpose of the optically anisotropic film to be manufactured.
- the width of the film is preferably 1000 to 4000 mm from the viewpoint of use in a large liquid crystal display device, use efficiency of the film during polarizing plate processing, and production efficiency.
- the film substrate 11 preferably has an in-plane retardation Ro determined by the above formula (1) of 0 to 330 nm. Further, the thickness direction retardation Rt determined by the above formula (2) is preferably ⁇ 100 to 340 nm.
- the optically anisotropic film according to an embodiment of the present invention includes a step of applying a composition for forming a liquid crystal alignment layer on the film substrate 11, and irradiating the composition for forming a liquid crystal alignment layer with active rays. Forming a liquid crystal alignment layer 13, applying a liquid crystal layer forming composition containing a fluorine-siloxane graft polymer and a polymerizable liquid crystal compound on the liquid crystal alignment layer, and forming the liquid crystal layer.
- It can be manufactured by a manufacturing method comprising an alignment step of aligning the polymerizable liquid crystal compound by heating the composition and an immobilization step of forming a liquid crystal layer by fixing the aligned polymerizable liquid crystal compound.
- it can.
- it is manufactured as follows.
- Fig.1 (a) it consists only of the said film base material 11, the said liquid crystal aligning layer 13, and the said liquid crystal layer 14, and the said 1st intermediate
- the optically anisotropic film will be described.
- a liquid crystal alignment layer 13 is formed on the film substrate 11.
- composition for forming a liquid crystal alignment layer containing the actinic radiation curable resin or the like is applied on the film substrate 11.
- the composition for forming a liquid crystal alignment layer may contain, for example, the cellulose ester resin, an organic solvent, a photopolymerization initiator, and the like in addition to the actinic radiation curable resin.
- the organic solvent is not particularly limited as long as it can dissolve the actinic radiation curable resin.
- alcohols such as isopropyl alcohol, ethers such as methylene chloride, dioxolane and propylene glycol monomethyl ether, esters such as ethyl acetate and methyl acetate, ketones such as acetone and methyl ethyl ketone, and diacetone alcohol Ketone alcohols and the like.
- alcohols such as isopropyl alcohol and ethers such as propylene glycol monomethyl ether are preferable, and a mixed solvent of isopropyl alcohol and propylene glycol monomethyl ether is more preferable.
- these may be used independently and may be used in combination of 2 or more type.
- the solid content concentration of the composition for forming a liquid crystal alignment layer varies depending on the composition and the like, but is preferably about 0.1 to 80% by mass, for example.
- the photopolymerization initiator it is only necessary to contribute to the initiation of the curing reaction of the actinic radiation curable resin.
- ⁇ -hydroxyketone, acetophenone, benzophenone, hydroxybenzophenone, Michler's ketone, ⁇ -amyloxime ester, thioxanthone And derivatives thereof are preferred.
- these may be used independently and may be used in combination of 2 or more type.
- the content of the photopolymerization initiator is preferably about 0.1 to 1 part by mass with respect to 100 parts by mass of the actinic radiation curable resin, for example.
- the coating method is not particularly limited, and a known coating method can be used. Specific examples include a gravure coater, a spinner coater, a wire bar coater, a roll coater, a reverse coater, an extrusion coater, an air doctor coater, a die coater, a dip coater, and an ink jet method. And as application
- the liquid crystal alignment layer 13 is formed by irradiating the composition for forming a liquid crystal alignment layer applied on the film substrate 11 with active rays.
- liquid crystal layer 14 is formed on the liquid crystal alignment layer 13.
- a liquid crystal layer forming composition containing the fluorine-siloxane graft polymer and a polymerizable liquid crystal compound is applied on the liquid crystal alignment layer 13.
- the composition for forming a liquid crystal layer may contain, for example, an organic solvent, a photopolymerization initiator, and the like in addition to the fluorine-siloxane graft polymer and the polymerizable liquid crystal compound.
- the organic solvent is not particularly limited as long as it can dissolve the fluorine-siloxane graft polymer and the polymerizable liquid crystal compound.
- alcohols such as isopropyl alcohol, esters such as methylene chloride, dioxolane and propylene glycol monomethyl ether acetate, esters such as ethyl acetate and methyl acetate, ketones such as acetone and methyl ethyl ketone, and diacetone
- ketone alcohols such as alcohol.
- those having a relatively high boiling point such as propylene glycol monomethyl ether acetate are preferable.
- these may be used independently and may be used in combination of 2 or more type.
- the solid content concentration of the composition for forming a liquid crystal layer varies depending on the composition and the like, but is preferably about 0.1 to 80% by mass, for example.
- the photopolymerization initiator may be contained in the liquid crystal layer forming composition when a polymerizable liquid crystal compound having a polymerizable functional group is used.
- the photopolymerization initiator is not limited as long as it can contribute to the initiation of the curing reaction of the polymerizable liquid crystal compound, and examples thereof include those similar to the photopolymerization initiator of the liquid crystal alignment layer forming composition. Examples include ⁇ -hydroxyketone, acetophenone, benzophenone, hydroxybenzophenone, Michler's ketone, ⁇ -amyloxime ester, thioxanthone, and derivatives thereof. Of these, ⁇ -hydroxyketone and derivatives thereof are preferred. Moreover, these may be used independently and may be used in combination of 2 or more type.
- the content of the photopolymerization initiator is preferably about 0.1 to 1 part by mass with respect to 100 parts by mass of the polymerizable liquid crystal compound, for example.
- the coating method is not particularly limited, and a known coating method can be used, and the same coating method as the liquid crystal alignment layer forming composition can be used. Specific examples include a gravure coater, a spinner coater, a wire bar coater, a roll coater, a reverse coater, an extrusion coater, an air doctor coater, a die coater, a dip coater, and an ink jet method.
- the coating thickness varies depending on the solid content concentration of the liquid crystal layer forming composition, and specifically, for example, the thickness of the liquid crystal layer to be formed is within the above range. Is preferred.
- the polymerizable liquid crystal compound is aligned by heating the liquid crystal layer forming composition applied on the liquid crystal alignment layer 13 to a temperature higher than the liquid crystal transition temperature of the polymerizable liquid crystal compound.
- the alignment time takes about 1 to 10 minutes, for example.
- the liquid crystal layer forming composition is cooled below the liquid crystal transition temperature of the polymerizable liquid crystal compound, the orientation is fixed, and the liquid crystal layer forming composition is irradiated with actinic rays. By doing so, the alignment is more fixed, and the liquid crystal layer 14 in which the polymerizable liquid crystal compound is vertically aligned is formed.
- the formation of the functional layer 12 such as the liquid crystal alignment layer 13 and the liquid crystal layer 14 can be performed by, for example, an optical anisotropic film manufacturing apparatus as shown in FIG.
- an optical anisotropic film manufacturing apparatus as shown in FIG. 2
- a manufacturing apparatus of an optical anisotropic film it is not limited to what is shown in FIG. 2, The thing of another structure may be sufficient.
- FIG. 2 is a schematic diagram showing a basic configuration of the optically anisotropic film manufacturing apparatus 20.
- the optical anisotropic film manufacturing apparatus 20 includes an unwinding device 21, a coating device 22, a first temperature adjusting device 23, a second temperature adjusting device 24, a curing device 25, a winding device 26, and the like.
- the unwinding device 21 supplies a film to be processed such as a transparent film substrate to the coating device 22 and the like.
- the unwinding device 21 includes, for example, an unwinding roller wound so that the film to be processed can be unwound, and supplies the film to be processed to the coating device 22 and the like by rotating the unwinding roller. is there.
- the coating device 22 applies a liquid crystal alignment layer forming composition or a liquid crystal layer forming composition on the surface of the film to be processed supplied from the unwinding device 21.
- the coating device 21 can use a general coating device without limitation. Specifically, for example, the above-described coating apparatus and the like can be mentioned.
- the coating may be simultaneously applied in multiple layers with a single application device such as an extrusion die having a multi-manifold.
- a plurality of apparatuses may be arranged side by side and applied sequentially.
- the first temperature adjusting device 23 heats and drys the liquid crystal alignment layer forming composition applied on the film to be processed.
- the liquid crystal layer forming composition applied on the film to be treated is heated to align the polymerizable liquid crystal compound in the liquid crystal layer forming composition.
- the first temperature control device 23 may employ, for example, a convection drying method using hot air, a radiant drying method using radiant heat such as infrared rays, or the like.
- the liquid crystal alignment layer forming composition applied on the film to be processed is cooled to form a liquid crystal alignment layer forming composition before curing.
- the liquid crystal layer forming composition applied on the film to be treated is cooled, and not only the fluidity of the liquid crystal layer forming composition before curing is lowered, but also the liquid crystal layer forming
- the polymerizable liquid crystal compound in the composition for use is fixed.
- the second temperature adjusting device 24 may employ, for example, a convection drying method using cold air.
- the curing device 25 is applied on a film to be processed, and the composition subjected to the above treatment is irradiated with active rays to be cured.
- active ray irradiation apparatuses such as an ultraviolet irradiation apparatus, are mentioned, for example.
- the winding device 26 winds up the optically anisotropic film obtained as described above.
- the winding device 26 is, for example, a device that includes a rotatable winding roller and winds the optically anisotropic film by rotating the winding roller.
- the film substrate is not particularly limited as long as it can be used as a substrate for an optically anisotropic film.
- a resin film obtained by a solution casting film forming method or a melt casting film forming method described later can be used, and a resin film obtained by a melt casting film forming method is preferable. Used. If it is such a resin film, a film thickness is uniform and it can be conveniently used as a base material of an optically anisotropic film.
- the manufacturing method of the cellulose-ester film which is a resin film suitable as a film base material is demonstrated here.
- the solution casting film forming method includes a casting step in which a resin solution (dope) in which a transparent resin is dissolved is cast on a traveling support to form a casting film (web), and the casting film is
- a film forming method comprising a peeling step for peeling from the support as a film, a stretching step for stretching the peeled film, and a drying step for drying the film by transporting the stretched film with a plurality of transport rollers. is there.
- it is performed by a resin film manufacturing apparatus using a solution casting film forming method as shown in FIG.
- a manufacturing apparatus of a resin film it is not limited to what is shown in FIG. 3, The thing of another structure may be sufficient.
- FIG. 3 is a schematic diagram showing a basic configuration of a resin film manufacturing apparatus 31 by a solution casting method.
- the resin film manufacturing apparatus 31 includes an endless belt support 32, a casting die 33, a peeling roller 34, a stretching apparatus 35, a drying apparatus 36, a winding apparatus 37, and the like.
- the casting die 33 casts a resin solution (dope) 38 in which a transparent resin is dissolved onto the surface of the endless belt support 32.
- the endless belt support 32 is formed into a film by forming a web made of the dope 38 cast from the casting die 33 and drying it while being conveyed.
- the peeling roller 34 peels the film from the endless belt support 32.
- the stretching device 35 stretches the peeled film.
- the drying device 36 dries the stretched film while being conveyed by a conveyance roller.
- the winding device 37 winds the dried film into a film roll.
- the dope is supplied to the casting die 33 from a dope supply pipe connected to the upper end. Then, the supplied dope is discharged from the casting die 33 to the endless belt support 32, and a web is formed on the endless belt support 32.
- the endless belt support 32 is a metal endless belt having a mirror surface and traveling infinitely.
- a belt made of stainless steel or the like is preferably used from the viewpoint of peelability of the film.
- the width of the cast film cast by the casting die 33 is preferably 80 to 99% with respect to the width of the endless belt support 32.
- the width of the endless belt support 32 is preferably 1800 to 5000 mm.
- a rotating metal drum (endless drum support) having a mirror surface may be used instead of the endless belt support.
- the endless belt support 32 dries the solvent in the dope while conveying the cast film (web) formed on the surface thereof.
- the drying is performed, for example, by heating the endless belt support 32 or blowing heated air onto the web.
- the temperature of the web varies depending on the dope solution, the range of ⁇ 5 to 70 ° C. is preferable and the range of 0 to 60 ° C. is preferable in consideration of the conveyance speed and productivity accompanying the evaporation time of the solvent. More preferred.
- the higher the temperature of the web the faster the solvent can be dried. However, when the temperature is too high, the web tends to foam or the flatness tends to deteriorate.
- a method of heating the web on the endless belt support 32 with an infrared heater for example, a method of heating the back surface of the endless belt support 32 with an infrared heater, the back surface of the endless belt support 32 And a method of heating by blowing heated air, and the like can be selected as needed.
- the wind pressure of the heated air is preferably 50 to 5000 Pa in consideration of the uniformity of solvent evaporation and the like.
- the temperature of the heating air may be dried at a constant temperature, or may be supplied in several steps in the running direction of the endless belt support 32.
- the time from casting the dope on the endless belt support 32 to peeling the web from the endless belt support 32 varies depending on the film thickness of the resin film to be produced and the solvent used. Considering the peelability from the belt support 32, it is preferably in the range of 0.5 to 5 minutes.
- the conveying speed of the cast film by the endless belt support 32 is preferably about 50 to 200 m / min, for example. Further, the ratio (draft ratio) of the casting film conveyance speed to the traveling speed of the endless belt support 32 is preferably about 0.8 to 1.2. When the draft ratio is within this range, the cast film can be stably formed. For example, if the draft ratio is too large, there is a tendency to cause a phenomenon called neck-in in which the cast film is reduced in the width direction, and if so, a wide film cannot be formed.
- the peeling roller 34 is in contact with the surface of the endless belt support 32 on which the dope 38 is cast, and the dried web (film) is peeled by applying pressure to the endless belt support 32 side. .
- the film is stretched in the film transport direction (Machine Direction: MD direction) by the peeling tension and the subsequent transport tension. For this reason, it is preferable that the peeling tension and the conveying tension when peeling the film from the endless belt support 32 are 50 to 400 N / m.
- the total residual solvent amount of the film when the film is peeled off from the endless belt support 32 is the peelability from the endless belt support 32, the residual solvent amount at the time of peeling, the transportability after peeling, and the result after transporting and drying.
- the physical properties of the resin film and the like it is preferably 30 to 200% by mass.
- the stretching device 35 stretches the film peeled from the endless belt support 32 in a direction (Transverse Direction: TD direction) orthogonal to the web conveyance direction. Specifically, both ends in a direction perpendicular to the film transport direction are gripped with a clip or the like, and the distance between the opposing clips is increased to extend in the TD direction. And the said extending
- the drying device 36 includes a plurality of transport rollers, and dries the film while transporting the film between the rollers. In that case, you may dry using heating air, infrared rays, etc. independently, and you may dry using heating air and infrared rays together. It is preferable to use heated air from the viewpoint of simplicity.
- the drying temperature varies depending on the amount of residual solvent in the film. However, the drying temperature is appropriately selected depending on the amount of residual solvent in the range of 30 to 180 ° C. in consideration of drying time, unevenness of shrinkage, stability of the amount of expansion and contraction, etc. That's fine. Further, it may be dried at a constant temperature, or may be divided into two to four stages of temperature and may be divided into several stages of temperature.
- the film can be stretched in the MD direction while being conveyed in the drying device 36.
- the amount of residual solvent in the film after the drying treatment in the drying device 36 is preferably 0.01 to 15% by mass in consideration of the load of the drying process, the dimensional stability expansion / contraction ratio during storage, and the like.
- the winding device 37 winds the film having a predetermined residual solvent amount on the winding core to a required length by the drying device 36.
- the temperature at the time of winding is preferably cooled to room temperature in order to prevent scratches and loosening due to shrinkage after winding.
- the winder to be used can be used without any particular limitation, and may be a commonly used one, such as a constant tension method, a constant torque method, a taper tension method, or a program tension control method with a constant internal stress. Can be wound up.
- the resin film that can be used as the film substrate according to the embodiment of the present invention is obtained through the above-described steps.
- the resin contained in the resin solution is not particularly limited as long as it is a resin having transparency when formed into a substrate by a solution casting film forming method or the like, but can be manufactured by a solution casting film forming method or the like. It is preferable that it is easy, has excellent adhesion to a liquid crystal alignment layer, and is optically isotropic.
- Specific examples of the transparent resin include cellulose ester resins such as cellulose triacetate resin.
- the dope used in the solution casting film forming method may contain fine particles. In this case, the fine particles to be used are appropriately selected according to the purpose of use, but are preferably fine particles that can scatter visible light when contained in a transparent resin.
- the fine particles may be inorganic fine particles such as silicon oxide or organic fine particles such as acrylic resin.
- a solvent containing a good solvent for the transparent resin can be used, and a poor solvent may be contained within a range in which the transparent resin does not precipitate.
- the good solvent for the cellulose ester resin include organic halogen compounds such as methylene chloride.
- the poor solvent for the cellulose ester resin include alcohols having 1 to 8 carbon atoms such as methanol.
- the resin solution used in the solution casting film forming method may contain other components (additives) other than the transparent resin, fine particles, and solvent as long as the effects of the present invention are not impaired.
- the additive include a plasticizer, an antioxidant, an ultraviolet absorber, a heat stabilizer, a conductive substance, a flame retardant, a lubricant, and a matting agent.
- a cellulose ester resin solution can be obtained by mixing the above-mentioned compositions.
- the obtained cellulose ester resin solution is preferably filtered using a suitable filter medium such as filter paper.
- melt casting method Next, the case where a resin film is manufactured by the melt casting method will be described.
- the melt casting film forming method includes a casting step of casting a resin melt obtained by melting a transparent resin on a traveling support to form a casting film, and cooling the casting film to form a film.
- a film forming method comprising: a cooling step for forming a film; a peeling step for peeling the film from the support; and a stretching step for stretching the film by transporting the peeled film with a plurality of transport rollers.
- it is performed by a resin film manufacturing apparatus using a melt casting film forming method as shown in FIG.
- a manufacturing apparatus of a resin film it is not limited to what is shown in FIG. 4, The thing of another structure may be sufficient.
- FIG. 4 is a schematic diagram showing a basic configuration of a resin film manufacturing apparatus 41 by a melt casting film forming method.
- the resin film manufacturing apparatus 41 includes a first cooling roller 42, a casting die 43, a touch roller 44, a second cooling roller 45, a third cooling roller 46, a peeling roller 47, a conveying roller 48, a stretching device 49, and a winding device.
- the apparatus 50 etc. are provided.
- the casting die 43 casts a resin melt (dope) obtained by melting a transparent resin onto the surface of the first cooling roller 42.
- the first cooling roller 42 forms a casting film made of a dope cast from the casting die 43, cools the casting film while transporting it, and transports the casting film to the second cooling roller 45.
- the thickness of the casting film is adjusted and the surface is smoothed by the touch roller 44 provided in contact with the first cooling roller 42.
- the second cooling roller 45 cools the cast film while transporting the cast film, and transports the cast film to the third cooling roller 46. By so doing, the cast film is used as a film.
- the peeling roller 47 peels the film from the third cooling roller 46.
- the transport roller 48 extends in the MD direction while transporting the peeled film.
- the stretching device 49 stretches the film in the TD direction.
- the winding device 50 winds the cooled and solidified film to form a film roll.
- the casting die 43 has the same configuration as the casting die 33 except that a resin melt is discharged as a dope instead of the resin solution.
- the first cooling roller 42, the second cooling roller 45, and the third cooling roller 46 are metal rollers having a mirror surface.
- a roller made of stainless steel or the like is preferably used from the viewpoint of peelability of a cast film or a film.
- the touch roller 44 has an elastic surface, and is deformed along the surface of the first cooling roller 42 by the pressing force to the first cooling roller 42, and between the first cooling roller 42, Form a nip.
- the touch roller 44 is not particularly limited as long as it is a touch roller conventionally used in the melt casting film forming method. Specifically, the thing made from stainless steel is mentioned, for example.
- the peeling roller 47 is in contact with the third cooling roller 46, and the film is peeled by pressurization.
- the transport roller 48 is composed of a plurality of transport rollers, and can be stretched in the MD direction of the film by setting a different rotational speed for each transport roller.
- the stretching device 49 and the winding device 50 may be the same as the stretching device 35 and the winding device 37 in the solution casting film forming method.
- the same resin as that used in the solution casting film forming method can be used as long as it can be heated and melted.
- the same composition as in the solution casting film forming method can be used for other compositions.
- the film substrate is not limited to the resin film formed by the solution casting film forming method or the melt casting film forming method, and may be a resin film formed by other methods, The resin film which laminated
- the film base material is a film formed by casting a resin melt containing the transparent resin and a plasticizer on a traveling support and cooling the cast film.
- a resin film obtained by peeling from a support, that is, a resin film formed by a melt casting method is preferable.
- a polarizing plate includes a polarizing element and a protective film disposed on a surface of the polarizing element, and the optical anisotropic according to the embodiment of the present invention is used as the protective film.
- a functional film is used.
- the polarizing element is an optical element that emits incident light converted to polarized light, and is generally referred to as a polarizer or a polarizing film.
- the polarizing plate for example, a completely saponified polyvinyl alcohol aqueous solution is used on at least one surface of a polarizing element produced by immersing and stretching a polyvinyl alcohol film in an iodine solution. What stuck the adhesive film is preferable. Further, the optically anisotropic film may be laminated on the other surface of the polarizing element, or a transparent protective film for another polarizing plate may be laminated.
- the transparent protective film for this polarizing plate for example, commercially available cellulose ester films such as KC8UX2M, KC4UX, KC5UX, KC4UY, KC8UY, KC12UR, KC8UY-HA, KC8UX-RHA, KC4FR-1, KC4HR-1, KC8UCR- 3, KC8UCR-4, KC8UCR-5, KC4UESW (manufactured by Konica Minolta Opto Co., Ltd.) and the like are preferably used.
- resin films such as cyclic olefin resin other than a cellulose-ester film, an acrylic resin, polyester, a polycarbonate. In this case, since the saponification suitability is low, it is preferable to perform an adhesive process on the polarizing plate through an appropriate adhesive layer.
- the polarizing plate uses the optical anisotropic film as a protective film laminated on at least one surface side of the polarizing element.
- the optical anisotropic film works as an optical compensation film such as a retardation film
- the slow axis of the optical anisotropic film is arranged so as to be substantially parallel or orthogonal to the absorption axis of the polarizing element. Preferably it is.
- polarizing element examples include, for example, a polyvinyl alcohol polarizing film.
- Polyvinyl alcohol polarizing films include those obtained by dyeing iodine on polyvinyl alcohol films and those obtained by dyeing dichroic dyes.
- a modified polyvinyl alcohol film modified with ethylene is preferably used as the polyvinyl alcohol film.
- the polarizing element is obtained as follows, for example. First, a film is formed using a polyvinyl alcohol aqueous solution. The obtained polyvinyl alcohol film is uniaxially stretched and then dyed or dyed and then uniaxially stretched. And preferably, a durability treatment is performed with a boron compound.
- the film thickness of the polarizing element is preferably 5 to 40 ⁇ m, more preferably 5 to 30 ⁇ m, and even more preferably 5 to 20 ⁇ m.
- the polarizing plate as described above uses an optically anisotropic film according to the above embodiment as a transparent protective film, so that the optically anisotropic film is excellent in optical compensation performance and the like. An excellent polarizing plate can be obtained. Furthermore, since the optical anisotropic layer of the optical anisotropic film has high adhesion, its excellent optical compensation performance is maintained even in a poor environment such as high temperature and high humidity. A board is obtained.
- a liquid crystal display device includes a liquid crystal cell and two polarizing plates arranged so as to sandwich the liquid crystal cell, and at least one of the two polarizing plates includes: It is a polarizing plate concerning the present invention.
- the liquid crystal cell is a cell in which a liquid crystal substance is filled between a pair of electrodes, and by applying a voltage to the electrodes, the alignment state of the liquid crystal is changed and the amount of transmitted light is controlled. Since such a liquid crystal display device uses a polarizing plate excellent in optical compensation performance and the like, optical characteristics such as viewing angle characteristics of the liquid crystal display device can be improved. Therefore, high definition of the liquid crystal display device can be realized.
- liquid crystal display device examples include a reflective type, a transmissive type, and a transflective type, and also include a TN type, STN type, OCB type, HAN type, VA type (PVA). Type, MVA type), IPS type and the like.
- the polarizing plate provided with the optically anisotropic film according to the present embodiment is suitably used in an IPS liquid crystal display device.
- IPS In Plane Switching
- a liquid crystal display device of the present invention having characteristics can be manufactured.
- the IPS mode includes a fringe electric field switching (FFS) mode, and similarly to the IPS mode, a polarizing plate including the optical anisotropic film according to the present embodiment can be incorporated.
- FFS fringe electric field switching
- a liquid crystal display device having the same effect can be manufactured.
- the liquid crystal layer of the liquid crystal panel in the IPS mode type liquid crystal display device is homogeneously aligned in parallel with the substrate surface in the initial state, and the director of the liquid crystal layer in the plane parallel to the substrate is parallel to the electrode wiring direction when no voltage is applied. Or somewhat have an angle. Then, the direction of the director of the liquid crystal layer when the voltage is applied shifts to the direction perpendicular to the electrode wiring direction with the application of the voltage, and the director direction of the liquid crystal layer is compared with the direction of the director when no voltage is applied.
- the liquid crystal layer when the voltage is applied rotates the azimuth angle of the polarization by 90 ° like a half-wave plate, and the transmission axis of the output side deflection plate and the azimuth angle of the polarization Match and the display is white.
- the polarizing plate provided with the optically anisotropic film according to the present embodiment can also be used for a large-sized liquid crystal television.
- the screen size it can be used for 17 types or more, and can be suitably used from 26 types to about 100 types.
- Synidur N3200 biuret type prepolymer of hexamethylene diisocyanate
- the weight average molecular weight was determined by GPC. Further, the mass% of the fluorine-siloxane graft polymer 1 was determined by HPLC (liquid chromatography).
- commercial names of materials newly used in the preparation of the fluorine-siloxane graft polymer 3 are shown.
- Radical polymerizable monomer having one radical polymerizable double bond and at least one fluoroalkyl group in the molecule (F): Light ester FM-108 (heptadecafluorodecyl methacrylate; manufactured by Kyoeisha Chemical Co., Ltd.) Curing type acrylic resin: Desmophen A160 (hydroxyl value 90; manufactured by Sumika Bayer Urethane Co., Ltd.) Curing agent: Coronate HX (isocyanurate type prepolymer of hexamethylene diisocyanate; manufactured by Nippon Polyurethane) (Preparation of fluorine-siloxane graft polymer 3) In a glass reactor equipped with a mechanical stirrer, thermometer, condenser and nitrogen gas inlet, the above synthesized radical polymerizable fluororesin (A) (36.2 parts by mass), methyl methacrylate (11.6 parts by mass) ), 2-hydroxyethyl methacrylate (4.9 parts by mass), FM-07
- ⁇ Fluorine-siloxane graft polymer 5 Use of commercially available fluorine-siloxane graft polymer 5 (ZX-049, manufactured by Fuji Kasei Kogyo Co., Ltd.) (polymerizable liquid crystal compound) The following polymerizable liquid crystal compound A and polymerizable liquid crystal compound B were used as the polymerizable liquid crystal compound.
- the pressure is reduced to 100 ⁇ 10 2 Pa at 200 to 230 ° C., and finally the pressure is reduced to 4 ⁇ 10 2 Pa or less to remove the distillate, followed by filtration to remove the aromatic terminal ester compound ( A plasticizer) was obtained.
- a film substrate was produced by a melt casting film forming method.
- the obtained mixture was melt-mixed at 235 ° C. using a twin-screw extruder and pelletized.
- the cellulose ester film was formed by the manufacturing apparatus shown in FIG. Using a single screw extruder, pellets (moisture content 50 ppm) were melt-extruded from a T die, which is a casting die, onto a first cooling roller having a surface temperature of 100 ° C. at a melting temperature of 245 ° C. to form an initial film thickness. A cast film of 128 ⁇ m and a width of 1.0 m was obtained at a length of 35 m / min.
- the film was pressed on the first cooling roller with an elastic touch roller having a 2 mm thick metal surface.
- the obtained film was first stretched at 195 ° C. in the film-forming direction at a stretching rate of 1000% / min at 195 ° C. at a stretching rate of 1000% / min.
- a preheating zone a stretching zone, a holding zone, and a cooling zone (a neutral zone for ensuring thermal insulation between the zones is also provided between the zones).
- a stretching zone at 165 ° C. in a stretching zone the film was cooled to 30 ° C., released from the clip, and the clip holding part was cut off to obtain a film substrate (cellulose ester film).
- the retardation value of the cellulose ester film As for the retardation value of the cellulose ester film, Ro was 71 nm and Rt was 160 nm.
- the retardation value is a value measured at a wavelength of 590 nm using an automatic birefringence meter KOBRA-21ADH (Oji Scientific Instruments) after adjusting the humidity to 23 ° C. and 55% RH.
- a liquid crystal alignment layer was provided by the following procedure, and then a liquid crystal layer was provided on the liquid crystal alignment layer to prepare an optically anisotropic film 1. .
- the following liquid crystal alignment layer coating solution is applied on the cellulose ester fill by die coating, dried at 80 ° C. for 30 seconds, and then irradiated with an oxygen concentration of 2.0%, ultraviolet rays of 120 mJ / cm 2 and an illuminance of 200 mW / cm 2. Cured.
- the film thickness of the intermediate layer after curing was 2.0 ⁇ m.
- liquid crystal layer coating solution was applied on the liquid crystal alignment layer by a die coating to a thickness of 7 ⁇ m.
- the liquid crystal compound was aligned for 30 seconds.
- the film in which the liquid crystal compound was aligned was irradiated and cured at 250 mJ / cm 2 and an illuminance of 300 mW / cm 2 to obtain an optical anisotropic film 1.
- the thickness of the liquid crystal layer was 1.6 ⁇ m.
- the retardation of the retardation film 1 as a whole was 71 nm for Ro and -11 nm for Rt.
- ⁇ Preparation of optical anisotropic film 10> The same as film 1 except that the amount of photopolymerization initiator added to optically anisotropic film 1 is changed to 0.02 parts by mass.
- the coating unevenness of the liquid crystal layer was evaluated by measuring the number of alignment defects of the optically anisotropic film using a BX51 polarizing microscope manufactured by OLYMPUS. The number represents the number per mm 2 .
- the polarizing plate was placed in a crossed Nicol state, and the optically anisotropic film was set so that the in-plane slow axis was parallel to the polarizing analyzer transmission axis, and the number of point defects observed at that time was evaluated.
- the liquid crystal layer surface of the polarizing plate prepared using the optically anisotropic film and the glass were bonded together with an adhesive tape (No. 31B manufactured by Nitto Denko Corporation) for 2 weeks in an environment of 80 ° C. and 90% RH. After leaving, the state of pasting was visually evaluated according to the following criteria.
- Saponification step 2.5M NaOH 50 ° C. 90 seconds
- the saponification bath contamination after the saponification treatment was visually evaluated and evaluated according to the following criteria.
- ⁇ Contamination cannot be confirmed for peeling.
- ⁇ Turbidity of saponification solution can be confirmed.
- ⁇ Precipitates can be confirmed on the liquid surface.
- An optically anisotropic film having a thickness of 5000 m was prepared by the above-described method, and after contact with the liquid crystal layer UV, the contact angle with respect to formamide of the transport roll contacting the coated surface was measured. The contact angle was measured by using an automatic / dynamic contact angle meter DCA-VZ manufactured by FACE, and evaluated by a contact angle 0.1 seconds after dropping a droplet. When it is transferred to the transport roll, it is cleaned with acetone and roll cleaned. It is preferable that cleaning can be performed with a smaller number of cleanings, and cleaning is performed until the contact angle of the non-contact roll returns to 10 °.
- a peelable protective film (PET) is attached to one side of the optically anisotropic film 1 with a peelable protective film (PET) attached to the liquid crystal layer and a KC4UYSW film manufactured by Konica Minolta Opto.
- An alkali saponification treatment was performed. Further, after the alkali saponification treatment, the protective film was peeled off and bonded to the polarizing film as described below to produce a polarizing plate.
- Saponification step 2.5M-NaOH 50 ° C 90 seconds Water washing step Water 30 ° C 45 seconds Neutralization step 10 parts HCl 30 ° C 45 seconds Water washing step Water 30 ° C 45 seconds After saponification treatment, water washing, neutralization, water washing in this order And then dried at 80 ° C.
- a polarizing film 1 was prepared by laminating an anisotropic film 1.
- polarizing plates 2 to 13 were produced using optically anisotropic films 2 to 13.
- liquid crystal display device 1 ⁇ Production of liquid crystal display device 1>
- the polarizing plate on the viewing side of a Panasonic 26-inch liquid crystal television, TH-26LX60 liquid crystal panel was peeled off, and the liquid crystal layer of the produced polarizing plate was bonded to a liquid crystal cell glass using an adhesive having a thickness of 5 ⁇ m.
- the liquid crystal display device 1 was manufactured by setting the direction of bonding of the peeled polarizing plate and the transmission axis of the prepared polarizing plate to be parallel.
- the polarizing plates produced from the optically anisotropic films 1 to 10 of the present invention showed high contrast and excellent display properties. Thereby, it was confirmed that it is excellent as a polarizing plate for an image display device such as a liquid crystal display.
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Abstract
Description
6.前記液晶層が光重合開始剤を、前記重合性液晶化合物に対し0.1~30質量%含有することを特徴とする前記1~5のいずれか1項に記載の光学異方性フィルム。
本発明の一実施形態に係る光学異方性フィルムは、フィルム基材と、前記フィルム基材の上に形成された液晶配向層と、前記液晶配向層の上に形成された、重合性液晶化合物を含有する液晶層とを備え、前記液晶層は、さらにフッ素-シロキサングラフトポリマーを含有することを特徴とするものである。
Rt={(nx+ny)/2-nz}×d (2)
ここで、nxは、フィルムの面内の遅相軸方向の屈折率を示し、nyは、フィルムの面内の遅相軸に直交する方向の屈折率を示し、nzは、フィルムの厚み方向の屈折率を示し、dは、フィルムの厚み(nm)を示す。上記各屈折率は、例えば、王子計測機器株式会社製のKOBRA-21ADHを用いて、温度23℃、相対湿度55%RHの環境下で、波長590nmで測定することができる。
本発明においては、光学異方性フィルムの液晶層がフッ素-シロキサングラフトポリマーを含有することを特徴とする。
本発明の実施形態に係る液晶層14は、前記フッ素-シロキサングラフトポリマーに加えて、重合性液晶化合物を含有する。重合性液晶化合物としては、特に限定されず、液晶層に含有される従来公知の重合性液晶化合物等が挙げられる。
前記重合性液晶化合物としては、市販されているものとして、具体的には、例えば、DIC株式会社製のUCL018や、BASF社製のパリオカラーLC242等が挙げられる。
重合性液晶化合物の配向性を高める液晶配向層13は、図1に示すように、フィルム基材11の上、又は第2中間層16を備える場合には前記第2中間層16の上に、形成される。また液晶配向層13は、例えば、活性線硬化樹脂等の樹脂を含み、ラビング処理を施したものであってもよいし、活性線硬化樹脂等の樹脂と前記垂直配向剤とを含むものであってもよい。
フィルム基材11としては、透明性があり、光学異方性フィルムの基材として用いることができるものであれば、特に限定されない。なお、ここで透明性があるとは、可視光の透過率が60%以上であることであり、好ましくは80%以上、より好ましくは90%以上である。前記フィルム基材11としては、具体的には、例えば、透明性が高い樹脂フィルム等が挙げられる。
本発明の一実施形態に係る光学異方性フィルムは、前記フィルム基材11上に、液晶配向層形成用組成物を塗布する工程と、前記液晶配向層形成用組成物に活性線を照射して液晶配向層13を形成する工程と、前記液晶配向層上に、フッ素-シロキサングラフトポリマーと、重合性液晶化合物とを含有する液晶層形成用組成物を塗布する工程と、前記液晶層形成用組成物を加熱することによって前記重合性液晶化合物を配向させる配向工程と、配向された重合性液晶化合物を固定させることによって液晶層を形成する固定化工程とを備える製造方法によって、製造することができる。具体的には、以下のように製造される。ここでは、図1(a)に示すような、前記フィルム基材11、前記液晶配向層13、及び前記液晶層14のみからなり、前記第1中間層15及び第2中間層16を備えていない光学異方性フィルムについて説明する。
前記フィルム基材としては、上述したように、光学異方性フィルムの基材として用いることができるものであれば、特に限定されない。具体的には、例えば、後述する溶液流延製膜法や溶融流延製膜法等によって得られた樹脂フィルム等を用いることができ、溶融流延製膜法によって得られた樹脂フィルムが好ましく用いられる。このような樹脂フィルムであれば、膜厚が均一であって、光学異方性フィルムの基材として好適に使用できる。なお、ここでは、フィルム基材として好適な樹脂フィルムであるセルロースエステルフィルムの製造方法について説明する。
まず、溶液流延製膜法によって樹脂フィルムを製造する場合について説明する。
次に、溶融流延製膜法によって樹脂フィルムを製造する場合について説明する。
本発明の他の一実施形態に係る偏光板は、偏光素子と、前記偏光素子の表面上に配置された保護フィルムとを備え、前記保護フィルムとして、本発明の実施形態に係る前記光学異方性フィルムが用いられる。なお、前記偏光素子とは、入射光を偏光に変えて射出する光学素子であり一般に偏光子、または偏光膜といわれるものである。
本発明の他の一実施形態に係る液晶表示装置は、液晶セルと、前記液晶セルを挟むように配置された2枚の偏光板とを備え、前記2枚の偏光板のうち少なくとも一方が、本発明に係る偏光板である。なお、液晶セルとは、一対の電極間に液晶物質が充填されたものであり、この電極に電圧を印加することで、液晶の配向状態が変化され、透過光量が制御される。このような液晶表示装置は、光学補償性能等に優れた偏光板が用いられているので、液晶表示装置の視野角特性等の光学特性を改善することができる。したがって、液晶表示装置の高精細化を実現できる。
以下、フッ素-シロキサングラフトポリマー1の調製に用いた素材の市販品名を示す。
片末端ラジカル重合性ポリシロキサン(A):サイラプレーンFM-0721(数平均分子量5000;チッソ株式会社製)
ラジカル重合開始剤:パーブチルO(t-ブチルパーオキシ-2-エチルヘキサノエート;日本油脂株式会社製)
硬化剤:スミジュールN3200(ヘキサメチレンジイソシアネートのビウレット型プレポリマー;住化バイエルウレタン株式会社製)
〔ラジカル重合性フッ素樹脂(A)の合成〕
機械式撹拌装置、温度計、コンデンサー及び乾燥窒素ガス導入口を備えたガラス製反応器に、セフラルコートCF-803(1554質量部)、キシレン(233質量部)、及び2-イソシアナトエチルメタクリレート(6.3質量部)を入れ、乾燥窒素雰囲気下で80℃に加熱した。80℃で2時間反応し、サンプリング物の赤外吸収スペクトルによりイソシアネートの吸収が消失したことを確認した後、反応混合物を取り出し、ウレタン結合を介して50質量%のラジカル重合性フッ素樹脂(A)を得た。
機械式撹拌装置、温度計、コンデンサー及び乾燥窒素ガス導入口を備えたガラス製反応器に、上記合成したラジカル重合性フッ素樹脂(A)(26.1質量部)、キシレン(19.5質量部)、酢酸n-ブチル(16.3質量部)、メチルメタクリレート(2.4質量部)、n-ブチルメタクリレート(1.8質量部)、ラウリルメタクリレート(1.8質量部)、2-ヒドロキシエチルメタクリレート(1.8質量部)、FM-0721(5.2質量部)、及びパーブチルO(0.1質量部)を入れ、窒素雰囲気中で90℃まで加熱した後、90℃で2時間保持した。パーブチルO(0.1部)を追加し、さらに90℃で5時間保持することによって、重量平均分子量が171000である35質量%フッ素-シロキサングラフトポリマー1の溶液を得た。
片末端ラジカル重合性ポリシロキサン(A)を下記化合物に変更した以外は、上記ポリマー1の合成法により、重量平均分子量が204000である35質量%フッ素-シロキサングラフトポリマー2の溶液を得た。
<フッ素-シロキサングラフトポリマー3の調製>
以下、フッ素-シロキサングラフトポリマー3の調製で新たに用いた素材の市販品名を示す。
硬化型アクリル樹脂:デスモフェンA160(水酸基価90;住化バイエルウレタン社製)
硬化剤:コロネートHX(ヘキサメチレンジイソシアネートのイソシアヌレート型プレポリマー;日本ポリウレタン社製)
(フッ素-シロキサングラフトポリマー3の調製)
機械式撹拌装置、温度計、コンデンサー及び窒素ガス導入口を備えたガラス製反応器に、上記合成したラジカル重合性フッ素樹脂(A)(36.2質量部)、メチルメタクリレート(11.6質量部)、2-ヒドロキシエチルメタクリレート(4.9質量部)、FM-0721(10.5質量部)、FM-108(7.7質量部)、メタクリル酸(0.4質量部)、キシレン(1.5質量部)、酢酸n-ブチル(60.2質量部)、パーブチルO(0.3質量部)を入れ、窒素雰囲気中で90℃まで加熱した後、90℃で2時間保持した。パーブチルO(0.1部)を追加し、さらに90℃で5時間保持することによって、重量平均分子量が168000である40質量%のフッ素-シロキサングラフトポリマー3の溶液を得た。重量平均分子量はGPC、フッ素-シロキサングラフトポリマー3の質量%はHPLCにより求めた。
以下、フッ素-シロキサングラフトポリマー4の調製で新たに用いた素材の市販品名を示す。
(フッ素-シロキサングラフトポリマー4の調製)
機械式撹拌装置、温度計、コンデンサー及び乾燥窒素ガス導入口を備えたガラス製反応器に、上記合成したラジカル重合性フッ素樹脂(A)(26.7質量部)、キシレン(14.2質量部)、酢酸n-ブチル(13.7質量部)、メチルメタクリレート(5.4質量部)、n-ブチルメタクリレート(2.7質量部)、ラウリルメタクリレート(0.9質量部)、2-ヒドロキシエチルメタクリレート(1.8質量部)、FM-0721(1.3質量部)、ブレンマーPME-400(1.3質量部)、パーブチルO(0.1質量部)を入れ、窒素雰囲気中で90℃まで加熱した後、90℃で2時間保持した。パーブチルO(0.1質量部)を追加し、さらに90℃で5時間保持することによって、重量平均分子量が146000である40質量%のフッ素-シロキサングラフトポリマー4の溶液を得た。重量平均分子量はGPC、フッ素-シロキサングラフトポリマー4の質量%はHPLCにより求めた。
市販品のフッ素-シロキサングラフトポリマー5(ZX-049、富士化成工業社製)使用
(重合性液晶化合物)
重合性液晶化合物として下記、重合性液晶化合物A、重合性液晶化合物Bを用いた。
[フィルム基材の作製]
(芳香族末端エステル化合物の合成)
反応容器に、フタル酸410質量部、安息香酸610質量部、1,3-プロパンジオール418質量部、および触媒としてテトライソプロピルチタネート0.40質量部を一括して仕込み、窒素気流中で撹拌しながら、還流凝縮器を用いて過剰の溶剤を還流させながら、酸価が2以下になるまで130~250℃で加熱を続け、生成する水を連続的に除去した。次いで、200~230℃で、100×102Paに減圧し、最終的には4×102Pa以下まで減圧することによって、留出分を除去し、その後濾過して芳香族末端エステル化合物(可塑剤)を得た。
特表平6-501040号公報の例Bを参考にして、プロピオン酸、酢酸の添加量を調整して、アセチル基置換度1.6、プロピオニル基置換度0.9のセルロースエステルAを合成した。得られたセルロースエステルの置換度は、ASTM-D817-96に基づいて算出した。
溶融流延製膜法により、フィルム基材を作製した。
ポリエステルアクリレート 25質量部
(ラロマーLR8800 BASFジャパン(株)製)
プロピレングリコールモノメチルエーテル 290質量部
イソプロピルアルコール 685質量部
光重合開始剤(イルガキュア184 チバ・ジャパン(株)製)
0.05質量部
(液晶層塗布液)
重合性液晶化合物A 10質量部
重合性液晶化合物B 10質量部
プロピレングリコールモノメチルエーテルアセテート 80質量部
光重合開始剤(イルガキュア184 チバ・ジャパン(株)製)
表記載
フッ素-シロキサングラフトポリマー1 表記載
<光学異方性フィルム2の作製>
フッ素-シロキサングラフトポリマー1の代わりにフッ素-シロキサングラフトポリマー2を用いた以外フィルム1と同様である。
フッ素-シロキサングラフトポリマー1の代わりにフッ素-シロキサングラフトポリマー3を用いた以外フィルム1と同様である。
フッ素-シロキサングラフトポリマー1の代わりにフッ素-シロキサングラフトポリマー4を用いた以外フィルム1と同様である。
フッ素-シロキサングラフトポリマー1の代わりにフッ素-シロキサングラフトポリマー5を用いた以外フィルム1と同様である。
フッ素-シロキサングラフトポリマー1の添加量を0.01質量部に変更した以外フィルム1と同様である。
フッ素-シロキサングラフトポリマー1の添加量を0.20質量部に変更した以外フィルム1と同様である。
フッ素-シロキサングラフトポリマー1の添加量を0.001質量部に変更した以外フィルム1と同様である。
フッ素-シロキサングラフトポリマー1の添加量を0.30質量部に変更した以外フィルム1と同様である。
光学異方性フィルム1の光重合開始剤添加量を0.02質量部に変更した以外フィルム1と同様である。
光学異方性フィルム1よりフッ素-シロキサングラフトポリマー1を添加しない以外フィルム1と同様である。
フッ素-シロキサングラフトポリマー1の代わりにF-477(パーフルオロアルキル基・親油性基・親水性基含有オリゴマー;DIC株式会社製)を用いた以外フィルム1と同様である。
フッ素-シロキサングラフトポリマー1の代わりにFM-0721(片末端ラジカル重合性ポリシロキサン)を用いた以外フィルム1と同様である。
以上作製した光学異方性フィルム1~13を用いて以下の評価を実施した。
液晶層の塗布ムラはOLYMPUS社製BX51偏光顕微鏡を用いて光学異方性フィルムの配向欠陥個数を測定することで評価した。個数はmm2あたりの個数を表す。
各光学異方性フィルムの接着性を下記のように評価した。
△:四方の一部に剥離が確認できる
×:剥離が四方で確認できる。
各光学異方性フィルムを下記に記載する条件でアルカリ鹸化処理を10Lのケン化液に対しフィルム100m2実施した。
ケン化処理実施後のケン化浴汚染性を目視評価し、以下の基準で評価した。
△:ケン化液の濁りが確認できる
×:液面に析出物が確認できる
<ロール汚染性>
光学異方性フィルムを上記方法で5000m作製し、液晶層UV照射後、塗布面と接触する搬送ロールのホルムアミドに対する接触角を測定した。なお接触角は、FACE社製自動・動的接触角計DCA-VZ型を用いて測定し、液滴を落とした0.1秒後の接触角で評価した。搬送ロールに転写した際、アセトン洗浄しロール洗浄を実施する。より洗浄回数が少なく洗浄できる事が好ましく、非接触ロールの接触角は10°に戻るまで洗浄は行われる。
○:2回の洗浄で接触角10°回復
実質的には○レベル以上で問題なく使用可能
(アルカリ鹸化処理)
液晶層に剥離性の保護フィルム(PET製)を張り付けた光学異方性フィルム1とコニカミノルタオプト社製KC4UYSWフィルムの片面に剥離性の保護フィルム(PET製)を張り付けて下記に記載する条件でアルカリ鹸化処理を実施した。また、アルカリ鹸化処理後に保護フィルムを剥がし、下記のように偏光膜と貼り合せて偏光板を作製した。
水洗工程 水 30℃ 45秒
中和工程 10質量部HCl 30℃ 45秒
水洗工程 水 30℃ 45秒
ケン化処理後、水洗、中和、水洗の順に行い、次いで80℃で乾燥。
厚さ120μmの長尺ロールポリビニルアルコールフィルムを沃素1質量部、ホウ酸4質量部を含む水溶液100質量部に浸漬し、50℃で6倍に製膜方向に延伸して偏光膜L-2を作製した。
パナソニック製26インチ液晶テレビ、TH-26LX60の液晶パネルの視認側の偏光板を剥がし、上記作製した偏光板の液晶層を厚さ5μmの粘着剤を用いて液晶セルガラスとを貼合した。貼合方向は剥がした偏光板の透過軸と作製した偏光板の透過軸は平行とし、液晶表示装置1を作製した。
パナソニック製37インチ液晶テレビ、TH-37LZ85の液晶パネルのバックライト側の偏光板を剥がし、上記作製した偏光板2~13の液晶層を厚さ5μmの粘着剤を用いて液晶セルガラスとを貼合した。貼合方向は剥がした偏光板の透過軸と作製した偏光板の透過軸は平行とし、液晶表示装置2~13を作製した。
11 フィルム基材
12 機能層
13 液晶配向層
14 液晶層
15 第1中間層
16 第2中間層
20 光学異方性フィルムの製造装置
21 巻出装置
22 塗布装置
23 第1温度調節装置
24 第2温度調節装置
25 硬化装置
26 巻取装置
31,41 樹脂フィルムの製造装置
32 無端ベルト支持体
33,43 流延ダイ
34,47 剥離ローラ
35,49 延伸装置
36 乾燥装置
37,50 巻取装置
38 ドープ
42 第1冷却ローラ
44 タッチローラ
45 第2冷却ローラ
46 第3冷却ローラ
48 搬送ローラ
Claims (8)
- フィルム支持体上に液晶配向層、液晶層を積層してなる光学異方性フィルムにおいて、前記液晶層にフッ素-シロキサングラフトポリマーと重合性液晶化合物を含有することを特徴とする光学異方性フィルム。
- 前記フッ素-シロキサングラフトポリマーがウレタン結合を介してラジカル重合性不飽和結合部分を有するフッ素樹脂と片末端ラジカル重合性ポリシロキサンを反応させた共重合体であることを特徴とする請求項1に記載の光学異方性フィルム。
- 前記フッ素-シロキサングラフトポリマーを、前記重合性液晶化合物に対して0.01~1質量%含有することを特徴とする請求項1または2に記載の光学異方性フィルム。
- 前記重合性液晶化合物が、分子内に棒状のメソゲン基を有し、前記メソゲン基がその長軸方向を前記フィルム支持体の面方向に略垂直となるように配向させた後、該配向が固定化されていることを特徴とする請求項1~3のいずれか1項に記載の光学異方性フィルム。
- 前記液晶層が光重合開始剤を、前記重合性液晶化合物に対し0.1~30質量%含有することを特徴とする請求項1~5のいずれか1項に記載の光学異方性フィルム。
- 請求項1~6のいずれか1項に記載の光学異方性フィルムを偏光子の少なくとも一方の面に有することを特徴とする偏光板。
- 請求項7に記載の偏光板を液晶セルの少なくとも一方の面に有することを特徴とする液晶表示装置。
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012003114A (ja) * | 2010-06-18 | 2012-01-05 | Konica Minolta Opto Inc | 光学異方性フィルム、偏光板及び液晶表示装置 |
| US20130102011A1 (en) * | 2011-09-14 | 2013-04-25 | Cleveland State University | Human leucine-rich a-2-glycoprotein-1 and aminopeptidase n as risk indicators for cancer |
| JP2019218476A (ja) * | 2018-06-20 | 2019-12-26 | Dic株式会社 | 重合性組成物、位相差膜、その製造方法、液晶表示素子、及び有機発光表示素子 |
| CN112639553A (zh) * | 2018-09-12 | 2021-04-09 | 富士胶片株式会社 | 液晶膜、偏振片、圆偏振片及图像显示装置 |
| KR20210040374A (ko) * | 2018-08-02 | 2021-04-13 | 스미또모 가가꾸 가부시키가이샤 | 광학 필름 |
| JP2021172779A (ja) * | 2020-04-28 | 2021-11-01 | 富士フイルム株式会社 | フッ素含有共重合体、組成物、光学フィルム、液晶フィルム、ハードコートフィルム、偏光板 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112888561B (zh) * | 2018-10-18 | 2023-06-20 | 富士胶片株式会社 | 层叠体及图像显示装置 |
| KR102620957B1 (ko) * | 2020-07-10 | 2024-01-03 | 삼성에스디아이 주식회사 | 광학 필름, 이를 포함하는 편광판 및 이를 포함하는 광학표시장치 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007016207A (ja) * | 2005-06-10 | 2007-01-25 | Chisso Corp | 重合性液晶組成物 |
| WO2008126528A1 (ja) * | 2007-03-12 | 2008-10-23 | Konica Minolta Opto, Inc. | 防眩性反射防止フィルムの製造方法、防眩性反射防止フィルム、偏光板及び表示装置 |
| WO2009001629A1 (ja) * | 2007-06-26 | 2008-12-31 | Konica Minolta Opto, Inc. | クリアーハードコートフィルム、これを用いた反射防止フィルム、偏光板、及び表示装置 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005272560A (ja) * | 2004-03-24 | 2005-10-06 | Dainippon Ink & Chem Inc | 重合性液晶組成物、及びこれの重合物 |
-
2010
- 2010-07-06 WO PCT/JP2010/061446 patent/WO2011010551A1/ja not_active Ceased
- 2010-07-06 KR KR1020127001393A patent/KR20120031500A/ko not_active Ceased
- 2010-07-06 JP JP2011523601A patent/JPWO2011010551A1/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007016207A (ja) * | 2005-06-10 | 2007-01-25 | Chisso Corp | 重合性液晶組成物 |
| WO2008126528A1 (ja) * | 2007-03-12 | 2008-10-23 | Konica Minolta Opto, Inc. | 防眩性反射防止フィルムの製造方法、防眩性反射防止フィルム、偏光板及び表示装置 |
| WO2009001629A1 (ja) * | 2007-06-26 | 2008-12-31 | Konica Minolta Opto, Inc. | クリアーハードコートフィルム、これを用いた反射防止フィルム、偏光板、及び表示装置 |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012003114A (ja) * | 2010-06-18 | 2012-01-05 | Konica Minolta Opto Inc | 光学異方性フィルム、偏光板及び液晶表示装置 |
| US20130102011A1 (en) * | 2011-09-14 | 2013-04-25 | Cleveland State University | Human leucine-rich a-2-glycoprotein-1 and aminopeptidase n as risk indicators for cancer |
| JP2019218476A (ja) * | 2018-06-20 | 2019-12-26 | Dic株式会社 | 重合性組成物、位相差膜、その製造方法、液晶表示素子、及び有機発光表示素子 |
| JP7091867B2 (ja) | 2018-06-20 | 2022-06-28 | Dic株式会社 | 重合性組成物、位相差膜、その製造方法、液晶表示素子、及び有機発光表示素子 |
| KR20210040374A (ko) * | 2018-08-02 | 2021-04-13 | 스미또모 가가꾸 가부시키가이샤 | 광학 필름 |
| KR102901205B1 (ko) * | 2018-08-02 | 2025-12-16 | 스미또모 가가꾸 가부시키가이샤 | 광학 필름 |
| CN112639553A (zh) * | 2018-09-12 | 2021-04-09 | 富士胶片株式会社 | 液晶膜、偏振片、圆偏振片及图像显示装置 |
| CN112639553B (zh) * | 2018-09-12 | 2022-09-13 | 富士胶片株式会社 | 液晶膜、偏振片、圆偏振片及图像显示装置 |
| JP2021172779A (ja) * | 2020-04-28 | 2021-11-01 | 富士フイルム株式会社 | フッ素含有共重合体、組成物、光学フィルム、液晶フィルム、ハードコートフィルム、偏光板 |
| JP7324171B2 (ja) | 2020-04-28 | 2023-08-09 | 富士フイルム株式会社 | フッ素含有共重合体、組成物、光学フィルム、液晶フィルム、ハードコートフィルム、偏光板 |
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| Publication number | Publication date |
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| JPWO2011010551A1 (ja) | 2012-12-27 |
| KR20120031500A (ko) | 2012-04-03 |
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