TW201837507A - Optical member equipped with optically functional layer - Google Patents

Abstract

The optical member equipped with an optically functional layer according to the present invention has: an optically functional layer A containing a pigment; and a first optical member B1 which is disposed at least on one surface of the optically functional layer A and which has an oxygen permeation rate of, at most, 1 cm3/(m2·24 h·atm). This optical member has an optically functional layer that contains a pigment, has a favorable temporal stability, and is capable of maintaining a wide color gamut created by the pigment.

Description

Optical member with optical functional layer

The present invention relates to an optical member with an optical functional layer. Moreover, the optical member with the optical function layer of the present invention can be applied to a liquid crystal panel, a liquid crystal display device having the liquid crystal panel, and an image display device such as an organic EL display device.

BACKGROUND OF THE INVENTION Image display devices and the like are indispensable for arranging polarizing elements on both sides of a liquid crystal cell, and generally have a polarizing film attached thereto. When the polarizing film is attached to a liquid crystal cell, an adhesive is usually used. Further, in order to reduce the loss of light, in general, the polarizing film and the liquid crystal cell are adhered to each other using an adhesive. In this case, a polarizing film in which an adhesive is previously provided in the form of an adhesive layer on one side of the polarizing film with an adhesive layer is generally used, since it does not have to undergo a drying step when the polarizing film is fixed. advantage.

Further, a method of imparting a color tone to a polarizing film by adding a dye or a pigment to the toner layer to impart a high contrast liquid crystal display body has been proposed (Patent Document 1). In recent years, the image display device has required brightness and vividness (i.e., wide color gamut), and the organic EL display device (OLED) has attracted attention, and the liquid crystal display device has also sought wide color gamut. As a method of broadening the color gamut of the liquid crystal display device, for example, a method of laminating a polarizing film by absorbing an adhesive layer containing a dye which absorbs a maximum wavelength in a range of a specific wavelength (560 to 610 nm) has been proposed. One side or both sides of the liquid crystal cell (Patent Documents 2 and 3).

CITATION LIST Patent Literature Patent Literature 1: Japanese Patent Publication No. 3052812. Patent Document 2: Japanese Patent Laid-Open No. 2011-039093. Patent Document 3: Japanese Patent Laid-Open No. 2014-092611

SUMMARY OF THE INVENTION Problem to be Solved by the Invention In addition to the above, the pigment may be contained in the film layer applied to the optical member, in addition to the adhesive layer. In this way, the optical layer containing the pigment can be formed by allowing the film layer or the resin layer such as the adhesive layer to contain a pigment. In view of the moisture permeability of the resin layer which is the base of the optical functional layer, the dye layer in the optical functional layer deteriorates with time, and the optical functional layer gradually fades. In particular, when the optical functional layer is a pigment-containing adhesive layer, the durability of the adhesive layer is insufficient from the viewpoint of moisture permeability, and the adhesive layer which is initially dyed by the dye gradually fades. As a result, when the pigment in the optical functional layer (especially the adhesive layer) deteriorates with time, it is difficult to maintain a wide color gamut by the pigment.

It is an object of the present invention to provide an optical functional layer containing a pigment which has excellent stability over time and which maintains a wide color gamut by dye.

Means for Solving the Problems As a result of intensive efforts to review the above problems, the inventors of the present invention have found an optical member having an optical functional layer described below, and have completed the present invention.

That is, the present invention relates to an optical member having an optical functional layer, comprising: an optical functional layer containing a dye; and a first optical member and a second optical member positioned on both sides of the optical functional layer, and at least The oxygen permeability of the first optical member is 1 [cm ³ /(m ^2. 24h·atm)] or less.

The optical member with the optical functional layer described above may use a separator as the first optical member. Further, as the optical member having the optical functional layer, a polyvinyl alcohol-based polarizer may be used as the first optical member.

In the optical member with the optical function layer, the oxygen permeability of the second optical member is preferably 1 [cm ³ /(m ^2. 24h·atm)] or less. A separator may be used as the second optical member.

In the optical member having the optical functional layer, the dye may be used for at least one of a wavelength region of 470 to 510 nm and a wavelength region of 570 to 610 nm having a maximum absorption wavelength.

In the optical member having the optical functional layer, a porphyrin-based dye can be used as the dye.

The optical member having the optical functional layer preferably contains 0.01 to 5 parts by weight of the above-mentioned coloring matter with respect to 100 parts by weight of the base polymer of the resin layer forming the optical functional layer.

EFFECT OF THE INVENTION The optical member with an optical functional layer of the present invention has an optical functional layer containing a pigment. The optical functional layer can absorb light of a part of the wavelength by the dye, thereby adjusting the overall hue of the liquid crystal display device, and can improve the vividness by using a wide color gamut. In particular, a dye having a maximum absorption wavelength in at least any of 470 to 510 nm and a wavelength region of 570 to 610 nm can absorb colors in wavelength regions other than RGB (wavelength region 470 to 510 nm and/or wavelength region 570 to 610 nm). It is particularly effective for wide color gamuting by exhibiting unnecessary light emission and suppressing the aforementioned unnecessary light emission.

Further, the optical member with the optical functional layer of the present invention has an optical member on both sides of the optical function layer containing the dye. Even in the case of the optical member having the optical function layer having the optical member on both sides of the optical functional layer, the pigment of the optical functional layer is still discolored. It is known that this fading is caused by oxygen intruding into the optical functional layer through the optical member, and is activated by heat to attack the dye. The optical member with an optical functional layer of the present invention is an optical member having at least one single-layer layer of an optical functional layer containing a dye having an oxygen permeability of 1 [cm ³ /(m ^2. 24h·atm)] or less. By using the optical member having low oxygen permeability, oxygen can be prevented from intruding into the aforementioned optical functional layer of the optical member to which the optical functional layer is attached, whereby the discoloration (decomposition) of the dye can be suppressed, thereby providing stability and maintenance over time. Wide color gamut optical functional layer.

EMBODIMENT OF THE INVENTION Hereinafter, an embodiment of an optical member with an optical function layer of the present invention will be described in detail with reference to the drawings. However, the invention is not limited to the embodiments of the drawings.

As shown in Fig. 1, the optical member with an optical functional layer of the present invention comprises a dye-containing optical functional layer A, and a first optical member B1 and a second optical member B2 positioned on both surfaces of the optical functional layer A. The first optical member B1 is laminated on the first single surface of the optical function layer A, and the second optical member B2 is laminated on the second single surface of the optical function layer A. The first optical member B1 can use an oxygen permeability of 1 [cm ³ /(m ^2. 24h·atm)] or less. As the first optical member B1, for example, a separator, a polyvinyl alcohol-based polarizer, a laminate including a polyvinyl alcohol-based polarizer, or the like can be used. On the other hand, various materials can be used for the first optical member B2, and a separator or the like can be used. It is preferable to use the oxygen permeability of 1 [cm ³ / (m ^2. 24h・atm)] or less in the second optical member B2. The optical member with the optical function layer of the present invention can be used by combining the first optical member B1 and the second optical member B2.

For example, FIG. 2 shows a two-area layer of the optical function layer A having a separating member (s) as a first optical member B1 and a laminated separating member (s) as a two-sided separating member of the second optical member B2. Adhesive sheet of material.

For example, FIG. 3 shows a polarizing film (p) including a polyvinyl alcohol-based polarizer in the first single-layer layer of the optical function layer A as the first optical member B1 and the other second single-layer layer. There is a separator (s) as a polarizing film with an optical function layer attached to the separator of the second optical member B2.

The optical member with an optical functional layer of the present invention has a dye-containing optical functional layer, and has a first optical member and a second optical member on both surfaces of the optical functional layer. The following describes each component.

<Optical Functional Layer> The optical functional layer of the present invention is not particularly limited as long as it is a resin layer containing a dye. The resin layer may be a film layer, an adhesive layer or the like. The optical functional layer may be formed of a composition containing a base polymer and a pigment.

<Pigment> Various pigments can be used as the coloring matter contained in the optical functional layer of the present invention. Examples of the dye include a tetraazaporphyrin system, a porphyrin system, a cyanine system, an azo system, a pyrromethylene group, and a squaraine system. Various compounds such as a system, an oxaphthalocyanine system, and a squaraine system. From the viewpoint of broad color gamification, it is preferable to use a tetraazaporphyrin dye, a porphyrin dye, a cyanine dye, a squaraine dye, or a squaraine dye, and it is particularly preferable to use a tetraazaporphyrin. It is a pigment. The above-mentioned coloring matter is specifically disclosed in Japanese Laid-Open Patent Publication No. 2011-116818. These pigments may be used alone or in combination of two or more.

The coloring matter is preferably one having a maximum absorption wavelength in at least any one of a wavelength region of 470 to 500 nm and a wavelength region of 580 to 610 nm. A dye having a maximum absorption wavelength in the wavelength region absorbs light which is not required for color expression, thereby suppressing the light emission and is effective for wide color gamuting. A porphyrin-based dye can be applied to a dye having a maximum absorption wavelength in the wavelength region. The dye which exhibits a maximum absorption wavelength in the wavelength region of 580 to 610 nm, for example, a porphyrazine compound (trade name: PD-320, PD311) manufactured by Yamamoto Chemical Co., Ltd., and a diazaporphyrin compound (manufactured by Yamada Chemical Industry Co., Ltd.) Product name: FDG-007). In addition, the measurement of the maximum absorption wavelength of the dye was carried out by a spectrophotometer (V-570, manufactured by JASCO Corporation).

The pigment content of the optical functional layer of the present invention is adjusted according to the absorption wavelength region, the absorption coefficient and the type of the base polymer of the pigment, but is usually 0.01 to 5 parts by weight, and 0.05 to 0.05 parts by weight relative to the base polymer. 3 parts by weight is preferred, and 0.1 to 1 part by weight is more preferred. In particular, when a tetraazaporphyrin dye is used, the above range is preferred.

<Adhesive Layer> The optical functional layer of the present invention may be a pigment-containing adhesive layer, and the adhesive layer may be formed of an adhesive composition containing an adhesive base polymer and a pigment. The type of the adhesive base polymer is not particularly limited, and examples thereof include a rubber-based polymer, a (meth)acrylic polymer, a polyoxymethylene polymer, an urethane polymer, and a vinyl alkyl ether. Various polymers such as a polymer, a polyvinyl alcohol polymer, a polyvinylpyrrolidone polymer, a polypropylene phthalamide polymer, and a cellulose polymer.

The adhesive composition of the present invention contains an adhesive base polymer as a main component. The main component refers to a component having the highest content ratio of the total solid content contained in the adhesive composition, and is, for example, a component which accounts for more than 50% by weight of the total solid content contained in the adhesive composition, and further refers to more than 70%. % by weight of ingredients.

Among these adhesive base polymers, those having excellent optical transparency, exhibiting suitable wettability, cohesiveness and adhesion properties, and excellent weather resistance and heat resistance are preferably used. A (meth)acrylic polymer can be suitably used for exhibiting the characteristics. Hereinafter, an acrylic adhesive which is a material for forming an adhesive layer, that is, a (meth)acrylic polymer containing a (meth)acrylic acid alkyl ester as a monomer unit, as a base polymer will be described.

<(Meth)Acrylic Polymer> The (meth)acrylic polymer usually contains a (meth)acrylic acid alkyl ester as a main component as a monomer unit. Further, (meth) acrylate means acrylate and/or methacrylate, and (meth) of the present invention is also agreed.

The (meth)acrylic acid alkyl ester constituting the main skeleton of the (meth)acrylic polymer may, for example, be a linear or branched alkyl group having 1 to 18 carbon atoms. These may be used alone or in combination. The average carbon number of the alkyl groups is preferably from 3 to 9.

Further, from the viewpoints of adhesion characteristics, durability, adjustment of phase difference, adjustment of refractive index, etc., it is possible to use an aromatic ring such as phenoxyethyl (meth)acrylate or benzyl (meth)acrylate. Alkyl acrylate.

In order to improve the adhesiveness and heat resistance, one or more kinds of polymerizable groups having an unsaturated double bond such as a (meth) acrylonitrile group or a vinyl group may be introduced into the (meth)acrylic polymer by copolymerization. Functional group comonomer. Specific examples of such comonomers include 2-hydroxyethyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, and (meth)acrylic acid. 6-hydroxyhexyl ester, 8-hydroxyoctyl (meth)acrylate, 10-hydroxydecyl (meth)acrylate, 12-hydroxylauryl (meth)acrylate and (4-hydroxymethylcyclohexyl)- Hydroxy-containing monomer such as acrylate; carboxylated monomer such as (meth)acrylic acid, carboxyethyl (meth)acrylate, carboxypentyl (meth)acrylate, itaconic acid, maleic acid, fumaric acid, crotonic acid An acid anhydride group-containing monomer such as maleic anhydride or itaconic acid anhydride; a caprolactone adduct of acrylic acid; styrenesulfonic acid or allylsulfonic acid, 2-(methyl)acrylamido-2-methylpropane a sulfonic acid group-containing monomer such as sulfonic acid, (meth) acrylamide, propanesulfonic acid, sulfopropyl (meth) acrylate, (meth) propylene phthaloxy naphthalene sulfonic acid; 2-hydroxyethyl acrylonitrile A phosphate group-containing monomer or the like.

Further, examples of the monomer to be modified include (meth)acrylamide, N,N-dimethyl(meth)acrylamide, N-butyl(meth)acrylamide or N. - (N-substituted) guanamine monomer such as hydroxymethyl (meth) acrylamide or N-hydroxymethylpropane (meth) acrylamide; amine ethyl (meth) acrylate, (meth) acrylate -N,N-dimethylaminoethyl ester, alkylaminoalkyl (meth)acrylate such as tributylbutyl (meth)acrylate; methoxyethyl (meth)acrylate An alkoxyalkyl (meth) acrylate monomer such as ethoxyethyl (meth) acrylate; N-(methyl) propylene oxymethylene succinimide or N-(methyl) Propylene fluorenyl-6-oxyhexamethylene succinimide, N-(methyl) propylene decyl-8-oxy octamethyl succinimide, N-propylene fluorenyl Amber quinone imine monomer such as porphyrin; N-cyclohexylmaleimide or N-isopropylmaleimide, N-lauryl maleimide or N-phenylmaleimide And other maleic imine monomers; N-methyl Ikonium imine, N-ethyl Ikonium imine, N-butyl Ikonide, N-octylkonkine, An Ikonideimine monomer such as N-2-ethylhexyliconazole, N-cyclohexylkkonium imine, N-lauryl Icinoimine or the like.

Further, as the modifying monomer, vinyl acetate, vinyl propionate, N-vinyl pyrrolidone, methyl vinyl pyrrolidone, vinyl pyridine, vinyl piperidone, vinyl pyrimidine, vinyl may also be used. Piper Vinylpyr , vinyl pyrrole, vinyl imidazole, vinyl Azole, vinyl Vinyl, N-vinylcarboxylic acid decylamine, vinyl monomer such as styrene, α-methylstyrene, N-vinyl caprolactam; cyanoacrylate such as acrylonitrile or methacrylonitrile An epoxy group-containing acrylic monomer such as glycidyl (meth)acrylate; polyethylene glycol (meth) acrylate, polypropylene glycol (meth) acrylate, methoxyethylene glycol (A) Glycol acrylate monomer such as acrylate or methoxypolypropylene glycol (meth) acrylate; tetrahydrofurfuryl (meth) acrylate, fluoro (meth) acrylate, polyfluorene (methyl) An acrylate type monomer such as acrylate or 2-methoxyethyl acrylate or the like. Further, isoprene, butadiene, isobutylene, vinyl ether and the like can be mentioned.

Further, the copolymerizable monomer other than the above may be a decane-based monomer containing a ruthenium atom. Examples of the decane-based monomer include 3-propenylphosphonium propyl triethoxy decane, vinyl trimethoxy decane, vinyl triethoxy decane, 4-vinyl butyl trimethoxy decane, and 4- Vinyl butyl triethoxy decane, 8-vinyloctyltrimethoxy decane, 8-vinyloctyltriethoxy decane, 10-methylpropenyl fluorenyltrimethoxydecane, 10-propene Anthracene trimethoxy decane, 10-methyl propylene fluorenyl decyl triethoxy decane, 10-propylene fluorenyl decyl triethoxy decane, and the like.

Further, as the comonomer, tripropylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, bisphenol A may also be used. Diepoxypropyl ether di(meth)acrylate, neopentyl glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, Pentaerythritol tetra(meth)acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa(meth) acrylate, caprolactone modified dipentaerythritol hexa a polyfunctional monomer having two or more unsaturated double bonds such as a (meth)acryl fluorenyl group or a vinyl group, such as an ester of a (meth)acrylic acid and a polyhydric alcohol, such as a methyl acrylate, or a polyester, a polyester (meth) acrylate having two or more unsaturated double bonds such as a (meth) acryl fluorenyl group or a vinyl group as a functional group similar to a monomer component, and a skeleton such as an epoxy group or a urethane group; Epoxy (meth) acrylate, urethane (meth) acrylate, and the like.

The weight ratio of the (meth)acrylic polymer in the total constituent monomer is based on the alkyl (meth)acrylate as a main component, and the ratio of the aforementioned comonomer in the (meth)acrylic polymer is The ratio of the comonomer is preferably from 0 to 20%, from 0.1 to 15%, more preferably from 0.1 to 10%, based on the total weight of the constituent monomers.

Among these comonomers, a hydroxyl group-containing monomer or a carboxyl group-containing monomer is preferably used from the viewpoints of adhesion, durability, and the like. A hydroxyl group-containing monomer and a carboxyl group-containing monomer may be used in combination. These comonomers become a reaction point with the crosslinking agent when the adhesive composition contains a crosslinking agent. Since the hydroxyl group-containing monomer, the carboxyl group-containing monomer, and the like have good reactivity with each other between the molecules and the crosslinking agent, it is preferred to use these monomers in order to enhance the cohesiveness and heat resistance of the obtained adhesive layer. From the viewpoint of reworkability, a hydroxyl group-containing monomer is preferred, and from the viewpoint of durability and reworkability, a carboxyl group-containing monomer is preferred.

When a monomer having a hydroxyl group is contained as the comonomer, the ratio is preferably 0.01 to 15% by weight, more preferably 0.03 to 10% by weight, still more preferably 0.05 to 7% by weight. When a monomer having a carboxyl group is contained as the comonomer, the ratio is preferably 0.05 to 10% by weight, more preferably 0.1 to 8% by weight, still more preferably 0.2 to 6% by weight.

The (meth)acrylic polymer of the present invention is usually one having a weight average molecular weight of from 500,000 to 3,000,000. In consideration of durability, particularly heat resistance, it is preferred to use a weight average molecular weight of 700,000 to 2.7 million. More than 800,000 to 2.5 million is appropriate. When the weight average molecular weight is less than 500,000, it is not preferable from the viewpoint of heat resistance. Further, if the weight average molecular weight becomes more than 3,000,000, a large amount of a diluting solvent is required to adjust the viscosity required for coating to increase the cost, which is not preferable. Further, the weight average molecular weight means a value measured by GPC (Gel Permeation Chromatography) and calculated in terms of polystyrene.

For the production of the (meth)acrylic polymer, a known production method such as radiation polymerization, bulk polymerization, emulsion polymerization, or various radical polymerization such as solution polymerization or UV polymerization can be appropriately selected. Further, the obtained (meth)acrylic polymer may be any of a random copolymer, a block copolymer, and a graft copolymer.

Further, in the solution polymerization, for example, ethyl acetate, toluene or the like can be used as the polymerization solvent. As a specific example of the solution polymerization, the reaction may be carried out by adding a polymerization initiator under an inert gas stream such as nitrogen, and usually carried out under the reaction conditions of about 50 to 70 ° C for about 5 to 30 hours.

The polymerization initiator, chain transfer agent, emulsifier and the like used for the radical polymerization are not particularly limited and may be appropriately selected. Further, the weight average molecular weight of the (meth)acrylic polymer can be controlled by the amount of the polymerization initiator, the chain transfer agent used, and the reaction conditions, and the amount thereof can be appropriately adjusted depending on the type thereof.

Examples of the radical polymerization initiator include 2,2'-azobisisobutyronitrile, 2,2'-azobis(2-amidinopropane) dihydrochloride, and 2,2'-azobis. [2-(5-Methyl-2-imidazolin-2-yl)propane] dihydrochloride, 2,2'-azobis(2-methylpropionamidine) disulfate, 2,2'- Azobis(N,N'-dimethyleneisobutylphosphonium), 2,2'-azobis[N-(2-carboxyethyl)-2-methylpropionamidine] hydrate (and pure light) An azo initiator such as VA-057), a persulfate such as potassium persulfate or ammonium persulfate, a di(2-ethylhexyl)peroxydicarbonate, or a di-(4-tert-butyl) Cyclohexyl)peroxydicarbonate, di-secondary butylperoxydicarbonate, tertiary butyl peroxy neodecanoate, trihexyl peroxydiacetate, trimethylacetate peroxide Butyl butyl ester, dilaurinyl peroxide, di-n-octyl decyl peroxide, 1,1,3,3-tetramethylbutylperoxy-2-ethylhexanoate, di(4-methyl) Perphenylidene) peroxide, benzhydryl peroxide, tertiary butyl peroxybutyrate, 1,1-di(tri-hexylperoxy)cyclohexane, tert-butyl Hydrogen peroxide, hydrogen peroxide, etc. a redox initiator such as an oxide initiator, a combination of a persulfate and sodium hydrogen sulfite, a combination of a peroxide and sodium ascorbate, and a reducing agent, etc., but is not limited by the above. .

The above-mentioned radical polymerization initiator may be used singly or in combination of two or more kinds. The total content is preferably from 0.005 to 1 part by weight, more preferably from 0.02 to 0.5 part by weight, per 100 parts by weight of the monomer.

Examples of the chain transfer agent include lauryl mercaptan, epoxypropyl mercaptan, indole acetic acid, 2-mercaptoethanol, thioglycolic acid, 2-ethylhexyl thioglycolate, and 2,3-didecyl. -1-propanol and the like. The chain transfer agent may be used singly or in combination of two or more kinds, and the total content is about 0.1 part by weight or less based on 100 parts by weight of the total amount of the monomer components.

Further, examples of the emulsifier used in the emulsion polymerization include sodium lauryl sulfate, ammonium lauryl sulfate, sodium dodecylbenzenesulfonate, polyoxyethylene ethyl ether ether sulfate, and polyoxyethyl ether. An anionic emulsifier such as sodium alkylphenyl ether sulfate, polyoxyethylene ethyl ether, polyoxyethylene ethyl phenyl ether, polyoxyethyl alcohol ester, polyoxyethylene ethyl-poly A nonionic emulsifier such as an oxygen propyl block polymer. These emulsifiers may be used alone or in combination of two or more.

Further, as the reactive emulsifier, an emulsifier which introduces a radical polymerizable functional group such as an acryl group or an allyl ether group may, for example, be Aqualon HS-10, HS-20, KH-10 or BC. -05, BC-10, BC-20 (all of which are manufactured by First Industrial Pharmaceutical Co., Ltd.), ADEKA REASOAP SE10N (made by Asahi Chemical Co., Ltd.), and the like. Since the reactive emulsifier is incorporated into the polymer chain after polymerization, it is preferred that the water resistance is good. The amount of the emulsifier used is 0.3 to 5 parts by weight based on 100 parts by weight of the total of the monomer components, and is preferably 0.5 to 1 part by weight in terms of polymerization stability and mechanical stability.

<Crosslinking Agent> Further, in the present invention, a crosslinking agent may be contained in the adhesive composition for forming an adhesive layer having a pigment. As the crosslinking agent, an organic crosslinking agent or a polyfunctional metal chelate compound can be used. Examples of the organic crosslinking agent include an isocyanate crosslinking agent, a peroxide crosslinking agent, an epoxy crosslinking agent, and an imide crosslinking agent. Polyfunctional metal chelates are those in which a polyvalent metal is covalently bonded or coordinately bonded to an organic compound. Examples of the polyvalent metal atom include Al, Cr, Zr, Co, Cu, Fe, Ni, V, Zn, In, Ca, Mg, Mn, Y, Ce, Sr, Ba, Mo, La, Sn, and Ti. The atom which may be covalently bonded or coordinately bonded to the organic compound may, for example, be an oxygen atom, and the organic compound may, for example, be an alkyl ester, an alcohol compound, a carboxylic acid compound, an ether compound or a ketone compound.

Examples of the isocyanate crosslinking agent compound include isocyanate monomers such as toluene diisocyanate, chlorophenyl diisocyanate, tetramethylene diisocyanate, xylylene diisocyanate, diphenylmethane diisocyanate, and hydrogenated diphenylmethane diisocyanate. And an isocyanate compound, a trimeric isocyanate or a biuret-type compound obtained by adding such an isocyanate monomer to trimethylolpropane or the like, and a polyether polyol or a polyester polyol, an acrylic polyol, An urethane prepolymer type isocyanate obtained by addition reaction of a polybutadiene polyol, a polyisoprene polyol, or the like. More preferably, it is a polyisocyanate compound, and is a polyisocyanate compound selected from the group consisting of hexamethylene diisocyanate, hydrogenated xylylene diisocyanate, and isophorone diisocyanate, or a polyisocyanate compound derived therefrom. Here, the polyisocyanate compound selected from the group consisting of hexamethylene diisocyanate, hydrogenated xylylene diisocyanate, and isophorone diisocyanate or derived therefrom includes: hexamethylene di Isocyanate, hydrogenated xylylene diisocyanate, isophorone diisocyanate, polyol modified hexamethylene diisocyanate, polyol modified hydrogenated xylylene diisocyanate, terpolymer hydrogenated xylylene diisocyanate and polyol Modified isophorone diisocyanate and the like. The polyisocyanate compound exemplified is preferred because it reacts rapidly with a hydroxyl group (especially, an acid or a base contained in a polymer is like a catalyst), and particularly contributes to rapid crosslinking.

The peroxide may be suitably used as long as it generates a radical active species by heating or light irradiation, and the base polymer of the adhesive composition is crosslinked. However, in consideration of workability and stability, a one-minute half-life temperature should be used. Peroxide at 80 ° C ~ 160 ° C, and preferably used at 90 ° C ~ 140 ° C peroxide.

The aforementioned peroxide may be bis(4-tert-butylcyclohexyl)peroxydicarbonate (1 minute half-life temperature: 92.1 ° C), di- or di-butyl peroxydicarbonate (1 minute half-life temperature: 92.4) °C), peroxy neodecanoic acid tert-butyl ester (1 minute half-life temperature: 103.5 ° C), trimethyl hexyl peroxyacetate (1 minute half-life temperature: 109.1 ° C), trimethyl peracetate tertiary Butyl ester (1 minute half-life temperature: 110.3 ° C), dilauroyl peroxide (1 minute half-life temperature: 116.4 ° C), di-n-octyl peroxide (1 minute half-life temperature: 117.4 ° C), 1, 1, 3 , 3-tetramethylbutylperoxy-2-ethylhexanoate (1 minute half-life temperature: 124.3 ° C), bis(4-methylbenzhydryl) peroxide (1 minute half-life temperature: 128.2 °C), benzoyl hydrazine peroxide (1 minute half-life temperature: 130.0 ° C), tertiary butyl peroxybutyrate (1 minute half-life temperature: 136.1 ° C), 1,1-di (tertiary hexyl peroxyl) Base) cyclohexane (1 minute half-life temperature: 149.2 ° C) and the like. Among them, in view of excellent cross-linking reaction efficiency, bis(4-tert-butylcyclohexyl)peroxydicarbonate (1 minute half-life temperature: 92.1 ° C), dilauroyl peroxide (1) Minute half-life temperature: 116.4 ° C), benzoyl hydrazine peroxide (1 minute half-life temperature: 130.0 ° C), etc. are suitable for use.

Further, the half-life of the peroxide is an index indicating the decomposition rate of the peroxide, and means the time when the residual amount of the peroxide becomes half. The decomposition temperature for achieving the half-life at any time, and the half-life time at any temperature are described in the manufacturer's catalogue, etc., for example, in the "Organic peroxide catalogue" of Nippon Oil & Fat Co., Ltd. Edition (May 2003) and so on.

In the adhesive composition, the crosslinking agent is preferably used in an amount of 20 parts by weight or less, more preferably 0.01 to 20 parts by weight, based on 100 parts by weight of the base polymer of the (meth)acrylic polymer or the like. It should be 0.03~10 parts by weight. On the other hand, when the amount of the crosslinking agent is more than 20 parts by weight, the moisture resistance is insufficient, and peeling easily occurs in a reliability test or the like.

Further, the adhesive composition for forming an adhesive layer having a pigment of the present invention may contain a decane coupling agent. Durability can be improved by using a decane coupling agent. Specific examples of the decane coupling agent include 3-glycidoxypropyltrimethoxydecane, 3-glycidoxypropyltriethoxydecane, and 3-epoxypropoxypropyl group. Epoxy-containing decane coupling agent such as 2-dimethoxydecane, 2-(3-4-epoxycyclohexyl)ethyltrimethoxydecane; 3-aminopropyltrimethoxydecane, N-2-( Aminoethyl)-3-aminopropylmethyldimethoxydecane, 3-triethoxyindolyl-N-(1,3-dimethylbutylidene)propylamine, N-phenyl-γ-amine An amine group-containing decane coupling agent such as propyltrimethoxydecane; (meth)acryl oxime containing 3-propenyloxypropyltrimethoxydecane, 3-methylpropenyloxypropyltriethoxydecane, etc. a decane coupling agent such as a decane coupling agent; an isocyanate group-containing decane coupling agent such as 3-isocyanate propyl triethoxy decane.

The decane coupling agent may be used alone or in combination of two or more. The total content of the decane coupling agent is preferably 0.001 to 5 by weight based on 100 parts by weight of the base polymer of the (meth)acrylic polymer or the like. The portion is preferably 0.01 to 1 part by weight, more preferably 0.02 to 1 part by weight, further preferably 0.05 to 0.6 part by weight. This is an amount which can improve the durability and appropriately maintain the adhesion force to the optical member such as the liquid crystal cell.

Further, in the adhesive composition for forming an adhesive layer having a pigment in the present invention, polyether-modified polyfluorene oxide may be blended. As the polyether-modified polyfluorene, for example, those disclosed in Japanese Laid-Open Patent Publication No. 2010-275522 can be used.

In the present invention, the adhesive composition for forming the adhesive layer having a pigment may further contain other known additives. For example, a powder such as a colorant or a pigment, a dye, a surfactant, and a plasticizer may be appropriately added depending on the intended use. , tackifier, surface lubricant, leveling agent, softener, anti-aging agent, antioxidant, light stabilizer, ultraviolet absorber, polymerization inhibitor, inorganic or organic filler, metal powder, granular, foil Wait. Further, a redox system to which a reducing agent is added may be employed within a controllable range.

Although the adhesive composition is formed by using the above-described adhesive composition, it is preferable to adjust the amount of the crosslinking agent to be added in the formation of the adhesive layer, and to fully consider the influence of the crosslinking treatment temperature and the crosslinking treatment time.

The crosslinking treatment temperature and the crosslinking treatment time can be adjusted depending on the crosslinking agent used. The crosslinking treatment temperature is preferably 170 ° C or less.

Further, the crosslinking treatment may be carried out at a temperature at the drying step of the adhesive layer, or may be carried out by additionally providing a crosslinking treatment step after the drying step.

Further, the crosslinking treatment time can be set in consideration of productivity and workability, but it is usually about 0.2 to 20 minutes, preferably about 0.5 to 10 minutes.

For the method of forming the adhesive layer having a pigment, for example, the adhesive composition may be applied to a release-treated separator or the like, and a polymerization solvent or the like may be dried to form an adhesive layer, and then transferred to the adhesive layer. a method of coating the first or second optical member; or applying the adhesive composition to the first or second optical member, drying the polymerization solvent or the like, and forming an adhesive layer on the first or second optical member; Method, etc. to make. Further, when the adhesive is applied, one or more solvents other than the polymerization solvent may be appropriately added.

The release treated release member is preferably a polyoxynitride release liner. In the step of applying the adhesive composition of the present invention to the lining material and drying it to form an adhesive layer, the method of drying the adhesive may be carried out in an appropriate and appropriate manner for the purpose. A method of subjecting the above coating film to superheat drying is preferably employed. The heating and drying temperature is preferably from 40 ° C to 200 ° C, more preferably from 50 ° C to 180 ° C, and particularly preferably from 70 ° C to 170 ° C. By setting the heating temperature to the above range, an adhesive having excellent adhesive properties can be obtained.

The drying time can be appropriately selected for a suitable period of time. The drying time is preferably from 5 seconds to 20 minutes, more preferably from 5 seconds to 10 minutes, and particularly preferably from 10 seconds to 5 minutes.

Further, an anchor layer may be formed on the surface of the first or second optical member, or various adhesion treatments such as corona treatment and plasma treatment may be performed to form an adhesive layer. Further, the surface of the adhesive layer can be easily treated.

Various methods can be employed for the formation of the aforementioned adhesive layer. Specific examples thereof include roll coating, contact roll coating, gravure coating, reverse coating, roll brushing, spray coating, dip roller coating, bar coating, blade coating, and air knife coating. Curtain coating, lip coating, a method such as a die coating method using a die coater or the like.

The thickness of the adhesive layer is not particularly limited and is, for example, about 1 to 100 μm. It should be 2~50μm, preferably 2~40μm, more preferably 5~35μm.

When the aforementioned adhesive layer is exposed, the release-treated sheet (separator) can also be used to protect the adhesive layer until it is ready for practical use.

<Thin film layer> Further, the optical functional layer of the present invention may be a film layer containing a dye, and the film layer may be formed of a composition containing a base polymer for forming a film and a coloring matter. The material of the base polymer used to form the film layer can be exemplified by the same materials as those described later for constituting the transparent protective film. In particular, a cellulose resin such as triacetyl cellulose, a polyester resin, a (meth)acrylic resin, a cyclic polyolefin resin (northene-based resin), or the like is preferably used. The film layer can be suitably applied to the first optical member and the second optical member using an adhesive, an adhesive or the like.

Various methods can be employed for the method of forming the pigment-containing film layer. For example, when the resin material particles are dissolved in a solvent, the composition can be prepared by mixing a pigment, and then the composition can be cast or extruded to produce a film layer. At this time, the film layer can be formed into a suitable thickness. The additive may be suitably blended in the preparation of the aforementioned composition.

The thickness of the film layer is not particularly limited, and is, for example, about 1 to 100 μm, similarly to the pressure-sensitive adhesive layer. It should be 2~50μm, preferably 2~40μm, more preferably 5~35μm.

<Optical member> Various optical members can be used in the present invention. Examples of the optical member include a separator, a polarizing film, a retardation film, a brightness enhancement film, and a glass plate.

The constituent material of the separator may be, for example, a plastic film such as polyethylene, polypropylene, polyethylene terephthalate or polyester film, a porous material such as paper, cloth or non-woven fabric, a mesh, a foamed sheet, or a metal. A suitable sheet such as a foil or the like, or the like, is preferably a plastic film from the viewpoint of excellent surface smoothness.

The plastic film is not particularly limited as long as it can protect the optical functional layer (especially the adhesive layer), and examples thereof include a polyvinyl alcohol film, a polyethylene film, a polypropylene film, a polybutene film, and a polypentadiene film. , polymethylpentene film, polyvinyl chloride film, vinyl chloride copolymer film, polyethylene terephthalate film, polybutylene terephthalate film, polyurethane film, ethylene-acetic acid B Ester copolymer film and the like.

The thickness of the separator is usually from 1 to 500 μm, preferably from 5 to 200 μm, and preferably from about 5 to 100 μm. The release member may be subjected to mold release and antifouling treatment using a polyfluorene-based, fluorine-based, long-chain alkyl-based or fatty acid amide-based release agent, cerium oxide powder, etc., and a coating type, Antistatic treatment such as kneading type or vapor deposition type. In particular, by appropriately performing a release treatment such as polyfluorination treatment, long-chain alkyl treatment, or fluorine treatment on the surface of the separator, the peeling property from the optical functional layer (especially the adhesive layer) can be further improved.

The aforementioned polarizing film generally has a transparent protective film for one side or both sides of the polarizing member.

The polarizer is not particularly limited, and various polarizers can be used. As the polarizing material, a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, or an ethylene-vinyl acetate copolymer-based partially saponified film may be adsorbed by iodine or a dichroic dye. The coloring matter is uniaxially stretched, and a polyene-based alignment film such as a dehydrated material of polyvinyl alcohol or a dehydrochlorinated product of polyvinyl chloride is used. Among these, a polarizer comprising a polyvinyl alcohol-based film and a dichroic material such as iodine is preferred. The thickness of the polarizing members is not particularly limited, and is generally about 80 μm or less.

A polarizing member which is uniaxially stretched with a iodine-based film of a polyvinyl alcohol-based film can be dyed by, for example, immersing a polyvinyl alcohol-based film in an aqueous solution of iodine, and extending it to a length of 3 to 7 times. . It may also be immersed in an aqueous solution containing potassium iodide such as boric acid, zinc sulfate or zinc chloride as needed. Further, it is also possible to immerse the polyvinyl alcohol-based film in water for washing with water before dyeing. By washing the polyvinyl alcohol-based film with water, the dirt and the anti-caking agent on the surface of the polyvinyl alcohol-based film can be washed, and the polyvinyl alcohol-based film can be swollen to prevent unevenness such as uneven dyeing. The extension may be carried out after dyeing with iodine, or may be extended while dyeing, or may be dyed with iodine after extension. It is also possible to carry out the extension in an aqueous solution of boric acid or potassium iodide or in a water bath.

Further, as the polarizer, a thin polarizer having a thickness of 10 μm or less can be used. From the viewpoint of thinning, the thickness is preferably 1 to 7 μm. Such a thin polarizer is preferred because it has less thickness variation, better visibility, less dimensional change, and excellent durability, and is also capable of being thinned as a thickness of a polarizing film.

The thin polarizer is representatively described in Japanese Patent Laid-Open No. 51-069644, Japanese Patent Laid-Open No. 2000-338329, WO2010/100917, and PCT/JP2010/001460, or Japanese. A thin polarizing film of the specification of Japanese Patent Application No. 2010-269692 or Japanese Patent Application No. 2010-263692. The thin polarizing film can be obtained by a method comprising the step of stretching a layer of a polyvinyl alcohol-based resin (hereinafter also referred to as a PVA-based resin) and a resin substrate for stretching in a layered body, and a step of dyeing. According to this production method, even if the PVA-based resin layer is thin, since it is supported by the resin substrate for stretching, it can be extended without causing problems such as breakage due to stretching.

As the thin polarizing film, in the method of the step of extending in the state of the laminated body and the step of dyeing, it is possible to increase the polarizing performance at a high magnification, and it is preferable to use, for example, WO2010/100917. Manufactured by a method of preparing a step of extending in an aqueous solution of boric acid as described in the specification of PCT/JP2010/001460, or the specification of Japanese Patent Application No. 2010-269002, or the specification of Japanese Patent Application No. 2010-263692. In particular, it is preferable to use a method for performing an auxiliary air extension step before extending in an aqueous boric acid solution as described in the specification of Japanese Patent Application No. 2010-269002 or Japanese Patent Application No. 2010-263692. Producer.

As the material constituting the transparent protective film, for example, a thermoplastic resin excellent in transparency, mechanical strength, thermal stability, moisture resistance, isotropy, and the like can be used. Specific examples of such a thermoplastic resin include cellulose resins such as triacetonitrile cellulose, polyester resins, polyether oxime resins, polyfluorene resins, polycarbonate resins, polyamide resins, and polyimine. A mixture of a resin, a polyolefin resin, a (meth)acrylic resin, a cyclic polyolefin resin (northene-based resin), a polyarylate resin, a polystyrene resin, a polyvinyl alcohol resin, and the like. Further, on one side of the polarizer, the transparent protective film is bonded by the adhesive layer, and on the other side, the transparent protective film may be (meth)acrylic, urethane or urethane acrylate. A thermosetting resin such as an epoxy resin or a polysiloxane or an ultraviolet curable resin. The transparent protective film may contain one or more optional additives as appropriate. The additives may, for example, be ultraviolet absorbers, antioxidants, slip agents, plasticizers, mold release agents, anti-colorants, flame retardants, nucleating agents, antistatic agents, pigments, colorants, and the like. The content of the above thermoplastic resin in the transparent protective film is preferably from 50 to 100% by weight, preferably from 50 to 99% by weight, more preferably from 60 to 98% by weight, particularly preferably from 70 to 97% by weight. When the content of the thermoplastic resin in the transparent protective film is 50% by weight or less, the original high transparency of the thermoplastic resin or the like may not be sufficiently exhibited.

A functional layer (surface layer) such as a hard coat layer, an antireflection layer, an anti-adhesion layer, a diffusion layer or an anti-glare layer may be provided on the surface of the transparent protective film that is not attached to the polarizing member.

The thickness of the transparent protective film is not particularly limited as long as the total thickness of the polarizing film is 100 μm or less, and may be, for example, about 10 to 90 μm. It should be 15~60μm, more preferably 20~50μm.

The adhesive used for bonding the polarizer and the transparent protective film may be any one of water, solvent, hot melt, radical hardening, and cationic hardening without any particular limitation. A form of an adhesive, but a water-based adhesive or a radical-curable adhesive is preferred.

The aforementioned glass plate can be used in various types of optical members. The aforementioned glass sheet contains a flexible glass sheet. The thickness of the aforementioned glass is preferably about 15 to 150 μm. The constituent material of the glass is not particularly limited, and examples thereof include SiO ₂ , Al ₂ O ₃ , B ₂ O ₃ , MgO, CaO, SrO, BaO, Na ₂ O, and Li ₂ O. These materials may be used singly or in combination of two or more kinds, and may contain other components.

In the first optical member of the present invention, the oxygen permeability of the optical member is 1 [cm ³ /(m ^2. 24h·atm)] or less. The oxygen permeability of the first optical member is preferably 0.8 [cm ³ /(m ^2. 24h·atm)] or less, and preferably 0.6 [cm ³ /(m ^2. 24h·atm)] or less, 0.5 [cm ^{3 .} /(m ^2. 24h・atm)] The following is better. Further, similarly to the first optical member, the second optical member preferably has an oxygen permeability of 1 [cm ³ /(m ^2. 24h·atm)] or less.

The oxygen permeability of the optical member may depend on the material, thickness, and the like. The oxygen permeability of the optical member is specifically determined by the description of the examples.

The separator having a degree of oxygen permeability of 1 [cm ³ /(m ^2. 24h·atm)] or less is preferably a polyvinyl alcohol film or a polyethylene terephthalate film. In addition, the thickness of the film is not particularly limited as long as it satisfies the oxygen permeability. From the viewpoint of handleability, it is usually 1 to 500 μm, and preferably 1 to 200 μm.

In addition, as the polarizing film having an oxygen permeability of 1 [cm ³ /(m ^2. 24h·atm)] or less, for example, a polyvinyl alcohol-based polarizer can be used. The thickness of the polyvinyl alcohol-based polarizer is not particularly limited as long as it satisfies the thickness of the oxygen permeability, and a material having the above-described thickness can be used. From the viewpoint of thinning, a material of 1 to 10 μm can be usually used.

<Liquid Crystal Panel> The optical member with the optical function layer of the present invention described above can be applied to the case of forming a liquid crystal panel. For example, when the optical functional layer using the optical member with the optical functional layer of the present invention is an optical member with an adhesive layer of the adhesive layer, the optical member of the adhesive layer (for example, the base member with the separation member on both sides) The adhesive layer of the adhesive sheet of the material can be suitably used when the polarizing film is attached to the liquid crystal cell to form a liquid crystal panel. Further, when a polarizing film is used as the optical member, the polarizing film with the adhesive layer can be bonded to at least one surface of the liquid crystal cell to form a liquid crystal panel. The adhesive layer of the optical member with the adhesive layer of the present invention or the polarizing film with the adhesive layer may be suitably used for the viewing side of the liquid crystal cell.

For the liquid crystal cell, for example, any type such as TN type, STN type, π type, VA type, and IPS type can be used. However, the liquid crystal panel of the present invention is preferably an IPS type liquid crystal cell.

In the formation of the liquid crystal panel, other optical layers may be applied in addition to the polarizing film described above. The optical layer is not particularly limited. For example, one or two or more layers such as a reflecting plate, a semi-transmissive plate, and a phase difference plate (including 1/2) may be used on the viewing side and/or the back side of the liquid crystal cell. And a 1/4-wavelength plate), a viewing angle compensation film, a brightness enhancement film, etc. are used for the optical layer formed by the liquid crystal panel.

<Liquid Crystal Display Device> The liquid crystal display device is formed by using the above-described liquid crystal panel, and assembling a component such as an illumination system as necessary, and assembling it into a drive circuit or the like. Further, when forming a liquid crystal display device, one or more layers such as a diffusion plate, an antiglare layer, an antireflection film, a protective plate, a tantalum array, a lens array sheet, a light diffusing plate, and the like may be disposed at appropriate positions. Suitable parts such as backlights. Further, a suitable liquid crystal display device such as a backlight or a reflector for use in an illumination system can be formed. Example

Hereinafter, the present invention will be specifically described by examples, but the present invention is not limited by the examples. As for the weight and the percentage of each case, the weight basis. Hereinafter, the room temperature standing conditions which are not specifically defined are all 23 ° C and 65% RH.

<Measurement of Weight Average Molecular Weight of (Meth)Acrylic Polymer> The weight average molecular weight (Mw) of the (meth)acrylic polymer was measured by GPC (gel permeation chromatography). The measurement was also carried out for Mw/Mn.・Analytical device: manufactured by Tosoh (Tosoh Corporation), HLC-8120GPC ・Pipe column: manufactured by Tosoh, G7000H _XL +GMH _XL +GMH _XL . Column size: each 7.8mmφ×30cm 90cm ・Tub column temperature: 40°C . Flow rate: 0.8 mL/min ・Injection amount: 100 μL ・Solution solution: Tetrahydrofuran ・Detector: Differential refractometer (RI) ・Standard sample: Polystyrene

<Measurement of Oxygen Permeability> OX-TRAN, which is an oxygen permeability measuring apparatus manufactured by MOCON Corporation, was used in accordance with JIS K 7126-2 under the conditions of 23 ° C and 0% RH.

<Optical member> PVA: A polyvinyl alcohol film (trade name: PE4500, manufactured by Kuraray Co., Ltd.) was used. The oxygen permeability is less than 0.02 [cm ³ /(m ^2. 24h・atm)]. PET: A polyethylene terephthalate film (trade name MRF38CK manufactured by Mitsubishi Plastics Corporation) was used. The oxygen permeability was 0.29 [cm ³ /(m ^2. 24h·atm)]. PMMA: A polymethyl methacrylate film was used. The oxygen permeability is 5 [cm ³ /(m ^2. 24h・atm)]. COP: A cyclic olefin film (trade name: ZEONOR ZF16, manufactured by Zeon Corporation, Japan) was used. The oxygen permeability was 652 [cm ³ /(m ^2. 24h·atm)]. Glass: A glass plate having a thickness of 1000 μm (sodium glass manufactured by Songlang Glass Industry Co., Ltd.) was used. The oxygen permeability is less than 0.02 [cm ³ /(m ^2. 24h・atm)] (below the measurement limit).

In addition, the above-mentioned PMMA (polymethyl methacrylate film) was melt-mixed by a uniaxial extruder manufactured by Asahi Kasei Chemical Co., Ltd., and a film was formed by a T-die. The obtained extruded film was simultaneously biaxially stretched twice (face magnification: 4.0) in the longitudinal direction and the width direction at an extension temperature of 240 ° C to obtain a film having a thickness of 40 μm. The extension speed is 10%/second in both the length direction and the width direction. The above PMMA was obtained in the above manner.

<Preparation of (meth)acrylic polymer> A monomer mixture containing 100 parts of butyl acrylate, 0.01 part of 2-hydroxyethyl acrylate, and 5 parts of acrylic acid is fed into a cooling tube, a nitrogen introduction tube, and a thermometer. And in the reaction vessel of the stirring device. Further, 0.1 part of 2,2'-azobisisobutyronitrile as a polymerization initiator was fed together with 100 parts of ethyl acetate with respect to 100 parts of the above monomer mixture, and nitrogen gas was slowly stirred while stirring. After introduction for nitrogen substitution, the liquid temperature in the flask was maintained at around 55 ° C for 8 hours to prepare a solution of an acrylic polymer having a weight average molecular weight (Mw) of 1.8 million and Mw/Mn = 4.1 (solid). The component concentration was 30% by weight).

Example 1 (Preparation of Adhesive Composition) The following composition was blended with respect to 100 parts of the solid content of the acrylic polymer solution prepared above to prepare an adhesive composition: 0.3 part of benzammonium peroxide (trade name NYPER BMT, manufactured by Nippon Oil & Fats Co., Ltd.), 0.6 parts of isocyanate-based cross-linking agent (trade name: Coronate L, manufactured by Tosoh Co., Ltd.), and 0.1 part of porphyrazine-based coloring matter (trade name of Yamamoto Kasei Co., Ltd.) PD-320: has a maximum absorption wavelength at a wavelength of 595 nm).

(Production of optical member with adhesive layer) The adhesive composition is uniformly applied to a release substrate of a polyethylene terephthalate film treated with a polyfluorene-based release agent by a spreader (Mitsubishi) The surface of MRF38CK manufactured by Resin Co., Ltd. was dried in an air circulating oven at 155 ° C for 2 minutes to form an adhesive layer having a thickness of 20 μm on the surface of the substrate. The release substrate was bonded to the other side of the obtained adhesive layer to obtain an adhesive sheet having a release substrate on both sides.

Next, after peeling the said peeling base material from the one surface of the said adhesive sheet, the said glass is bonded as the 2nd optical member on the adhesive layer of the exposure. After peeling off the peeling substrate from the other side, the PVA was bonded to the exposed adhesive layer as the first optical member, and the obtained product was used as a sample.

(Evaluation of fading) After the transmittance (initial) of the sample was measured, it was allowed to stand in a thermostat at 85 ° C for 24 hours, and then returned to room temperature (23 ° C), and then the transmittance (after 24 hours) was measured. The rate of change of transmittance = transmittance (after 24 hours) / transmittance (initial) × 100 (%) was determined from the above transmittance. The smaller the rate of change in transmittance, the less fading.

<Measurement of Transmittance> The measurement of the transmittance was measured using a spectroscopic transmittance measuring instrument (Dot-3c of Murakami Color Research Institute) with an integrating sphere. The transmittance was measured in the state where the sample was at 23 °C.

Examples 2 to 3 and Comparative Examples 1 and 2 In the same manner as in Example 1, except that the first and second optical members used in the preparation of the sample in Example 1 were changed to those shown in Table 1, adhesion was produced in the same manner as in Example 1. The optical member of the agent layer.

[Table 1]

The rate of change in transmittance of the examples was small and no fading was confirmed. On the other hand, the rate of change in the transmittance of the comparative example was large, and fading was confirmed.

A‧‧‧Optical functional layer

B1‧‧‧1st optical component

B2‧‧‧2nd optical component

(s) ‧ ‧ separate parts

(p) ‧‧‧ polarizing film

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing an optical member to which an optical functional layer of the present invention is attached. Fig. 2 is a cross-sectional view schematically showing an embodiment of an optical member to which an optical functional layer of the present invention is attached. Fig. 3 is a cross-sectional view schematically showing an embodiment of an optical member to which an optical functional layer of the present invention is attached.

Claims (8)

An optical member having an optical functional layer, comprising: an optical functional layer containing a dye; and a first optical member and a second optical member positioned on both surfaces of the optical functional layer, and at least the first optical member is transparent The oxygen degree is 1 [cm ³ /(m ^2. 24h・atm)] or less. An optical member having an optical functional layer as claimed in claim 1, wherein the first optical member is a separate member. An optical member having an optical functional layer as claimed in claim 1, wherein the first optical member comprises a polyvinyl alcohol-based polarizer. The optical member with an optical function layer according to any one of claims 1 to 3, wherein the second optical member has an oxygen permeability of 1 [cm ³ /(m ^2. 24h·atm)] or less. An optical member having an optical functional layer as claimed in claim 3, wherein the second optical member is a separate member. The optical member with an optical functional layer according to any one of claims 1 to 5, wherein the dye has a maximum absorption wavelength in at least any one of a wavelength region of 470 to 510 nm and a wavelength region of 570 to 610 nm. The optical member with an optical functional layer according to any one of claims 1 to 6, wherein the pigment is a porphyrazine-based dye. The optical member with an optical functional layer according to any one of claims 1 to 7, which contains 0.01 to 5 parts by weight of the above-mentioned coloring matter with respect to 100 parts by weight of the base polymer of the resin layer forming the optical functional layer.