TW201022738A - Polarizing plate, liquid crystal panel and liquid crystal display - Google Patents

Abstract

The present invention provides a polarizing plate, a liquid crystal panel using the polarizing plate and a liquid crystal display, wherein the polarizing plate comprises: a polarizing film that comprises a monoaxially stretched polyvinyl alcohol based resin film on which iodine or a dichromatic dye is adsorbed and oriented and a diffuser film that is laminated on at least one face of the polarizing film through a bond layer and has a haze of 1% or more, wherein the bond layer is made of a cured material of a curable composition comprising an epoxy resin.

Description

[Technical Field] The present invention relates to a polarizing plate, a liquid crystal panel using the polarizing plate, and a liquid crystal display device having one or both sides of a polarizing film. A diffusing film having a light diffusing property of an area layer. [Prior Art] The κ liquid crystal display device is rapidly expanding in use as a thin display device such as a liquid crystal television, a liquid crystal monitor, or a personal computer. In particular, LCDs, depending on the market, have expanded their bribes. Moreover, the cost reduction requirements are also very high. fj 〇 _, the usual liquid crystal display is made up of a backlight made of cold cathode tubes or ribs (back light) ), a light diffusing plate, i or a plurality of light diffusing sheets, a back side polarizing plate, a liquid crystal cell (1) called (3) (1) ❹, and a viewing side polarizing plate. In the use of large-screen LCD TVs, the use of thin-walled TVs as a wall-mounted TV is becoming apparent. At this time, due to the thinning of LCD TVs, the thinning of components used and the number of components are required. For this requirement, it is known to impart light diffusibility to the leather-side polarizing plate disposed between the liquid crystal single-handed and old light source, that is, to save one or several money to reduce the parts. (Japanese Patent Publication No. 11 183712 (Patent Document D, Japanese Patent Laid-Open Publication No. Hei. No. 133 (Special Dispatch 2), Japanese (Four) Bile _75 (3) Publication Patent Document 3), 曰本Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. The means for imparting light diffusibility by itself is as shown in the above-mentioned documents 1 to 6, etc., and a method of using a diffusing film imparted with light diffusibility as a transparent protective film laminated on a polarizing film is known. The film is bonded to the diffusion film or the transparent protective film. Water-based adhesives such as alcohol-based adhesives and ureth- sulphate-based adhesives (please refer to: 曰本特开挂- Brain G (Japanese Patent Publication No. 7), Japanese Unexamined 2005--Num. 8) Japanese Special Attack No. 56 (Patent Document 9)) ❹ However, for example, it will be made up of poly-pairs, two τ, and ethylene-diester (Polyethylene).

Tereph ate, also known as PET) - polymethylmethacrylate, which is a film made of a low-thirsty film such as p_film, which is pure in the form of polarized light, relatively hydrophobic or low moisture permeability. Further, due to the reason that the water-containing method contained in the adhesive is dried, there is a problem that sufficient adhesive strength or adverse effect on the appearance is not obtained. The present invention has been made to solve the above problems, and an object of the present invention is to provide a diffusion film and a polarizing film even when a diffusion film composed of a resin film having a low moisture permeability is used. A polarizing plate which is joined with a sufficiently high bonding strength and has a good appearance, in particular, is provided between the liquid crystal cell and the backlight = a back side polarizing plate. Further, another object of the present invention is to provide a liquid crystal panel and a liquid crystal display device using the two boards.九 九 九 九 九 九 九 九 九 九 九 九 九 九 九 九 依据 依据 依据 依据 依据 依据 依据 依据 依据 依据 依据 依据 依据 依据 依据 依据 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 A resin film is formed by laminating at least one surface of the optical film via an adhesive layer and having a haze (haZe). The adhesive layer is a curable composition containing an epoxy resin. 0 = compound. The epoxy resin contained in the curable composition is preferably an epoxy resin having no aromatic ring in the sub-assembly. The haze of the diffusion film is preferably 5% or more. The polarizing plate of the present invention preferably has a diffusion film in one area of the polarizing film, and an optical compensation film or a protective film in another area. The polarizing plate of the present invention can be suitably used as a back side polarizing plate disposed between a liquid crystal cell and a backlight provided in the liquid crystal display device. Further, according to the present invention, there is provided a liquid crystal panel comprising: a liquid crystal cell and the above-described polarizing plate of the present invention laminated on the liquid crystal cell, wherein the polarizing film of the polarizing plate has a layer of the polarizing film, and the film is expanded and dispersed An area layer liquid crystal cell on the opposite side of the surface of the polarizing film on which the diffusion film is laminated. Furthermore, according to the present invention, there is provided a liquid crystal display device comprising a backlight, a light diffusing plate, and the liquid crystal panel of the present invention, wherein the liquid crystal panel is such that the diffusing film of the polarizing plate and the light diffusing plate are And a liquid crystal display device according to the present invention, which is provided with a backlight, a light diffusing plate, a light diffusing sheet, and the above-described liquid crystal panel of the present invention, wherein the liquid crystal panel is The diffusion film of the polarizing plate is disposed opposite to the light diffusion sheet. According to the present invention, a polarizing plate and a liquid crystal panel having a high bonding strength and a good appearance of a diffusion film and a polarizing film are provided. Moreover, according to the present invention, it is possible to reduce the thickness of the liquid crystal display device and the number of components. The 5321524 201022738 liquid crystal display device of the present invention can be applied to a liquid crystal display device for a large-faced television, and is particularly applicable to a liquid crystal display device for a liquid crystal television which can be hung on a wall. [Embodiment] <Polarizing Plate> (Polarizing Film) The polarizing film used in the polarizing plate of the present invention specifically adsorbs and aligns a uniaxially stretched polyvinyl alcohol-based resin film to a dichroic dye. Founder. For the polyvinyl alcohol-based resin constituting the polyvinyl alcohol-based resin film, a saponification of a polyvinyl acetate-based resin can be used. In the case of the polyvinyl acetate oxime resin, in addition to the polyvinyl acetate which is a homopolymer of vinyl acetate, a copolymer such as vinyl acetate and other monomers copolymerizable therewith, such as ethylene, may be mentioned. - a vinyl acetate copolymer or the like. The other monomer copolymerizable with the vinyl acetate may, for example, be an unsaturated carboxylic acid, an olefin, a vinyl ether, an unsaturated sulfonic acid or an acrylamide having an ammonium group. The degree of saponification of the polyvinyl alcohol-based resin is usually from 85 to 100 mol% left to right, and preferably 98 mol% or more. The polyvinyl alcohol-based resin may also be modified. For example, an aldehyde-modified polyvinyl formal, a polyvinyl acetal, and a polyvinyl butyric acid may also be used. (polyviny 1 butyral) and so on. The degree of polymerization of the polyvinyl alcohol-based resin is usually from about 1,000 to about 10,000, and preferably from about 1,500 to 5,000. When the polyvinyl alcohol-based resin is formed into a film, it can be used as a raw material film for a polarizing film. The method of forming a film of a polyvinyl alcohol-based resin is not particularly limited. 6 321 524 201022738 « A film can be formed by a conventionally known suitable method. The film thickness of the raw material film composed of the polyvinyl alcohol-based resin is not particularly limited, and is usually, for example, about 1 〇 to 150 /z m. The polarizing film is usually produced by the following steps: a step of dyeing the raw material film composed of the polyvinyl alcohol-based resin as described above by a dichroic dye to adsorb the dichroic dye (dyeing step), and adsorbing two The step of treating the polyvinyl alcohol-based resin film of the coloring matter with a boric acid aqueous solution (boric acid treatment step) and the step of performing water washing after the boric acid aqueous solution treatment (water washing treatment step). In addition, 'in the manufacture of polarized light, usually the poly-bike tree is uniaxially extended' and this uniaxial extension can be carried out before the dyeing process, or in the dyeing process, or after the dyeing process . When the uniaxial stretching is carried out after the dyeing treatment step, the uniaxial stretching can be carried out before the treatment step, and in which acid treatment step. Of course, uniaxial stretching can also be performed in these multiple stages. The uniaxial extension can be extended at the peripheral speed without the same material (four) single (four) (four) extension, or it can be extended to the single shaft. Further, it may be a dry stretching which is extended in the atmosphere, or a wet stretching which is extended in a state of swelling with a solvent. The extension is usually about 3 to 8 times. The dyeing by the dichroic product of the polyethylene resin film in the dyeing step can be carried out, for example, by dipping the polyethylene glycol in an aqueous solution of a dichromatic dye. As the dichroic dye, for example, a broken or dichroic dye can be used. The dichroic dye includes, for example, a diazo compound such as CI DIRECT RED 39 (disaz〇c〇, d: 321524 7 201022738), a dichromatic direct dye, a trisazo, a tetrazo compound, or the like. A dichroic direct dye is formed. Further, the polyvinyl alcohol-based resin film is preferably subjected to a treatment of impregnation in water before the dyeing treatment. When iodine is used as the dichroic dye, polyethylene is usually used. The method of dyeing the alcohol resin film in an aqueous solution containing iodine and potassium iodide. The content of the moth in the aqueous solution is usually 0.01 to 1 part by weight per 100 parts by weight of water, and the content of potassium iodide is usually 100 parts by weight. The water content is 0.5 to 20 parts by weight. When iodine is used as the dichroic dye, the temperature of the aqueous solution used for dyeing is usually 20 to 40 ° C, and the time (dyeing time) of the impregnation in the aqueous solution is usually 20 On the other hand, when a dichroic dye is used as the dichroic dye, a method in which a polyvinyl alcohol-based resin film is impregnated into an aqueous solution containing a water-soluble dichroic dye and dyed is usually used. .here The content of the dichroic dye in the solution is usually 1 x 1 (T4 to 10 parts by weight, preferably 1 x 1 〇 - 3 to 1 part by weight, particularly preferably 1 χ 1 (Γ 3 to 1 χ 2 parts by weight) per 100 parts by weight of water. The aqueous solution may also contain an inorganic salt such as sodium sulfate as a dye aid. When a dichroic dye is used as the dichroic dye, the temperature of the dye aqueous solution used for dyeing is usually 20 to 80 ° C, and further, the aqueous solution is used. The immersion time (dyeing time) is usually 10 to 1,800 sec. The boric acid treatment step is carried out by immersing the polyvinyl alcohol-based resin film dyed with the dichroic dye in an aqueous solution containing boric acid. The amount of boric acid in the aqueous solution containing boric acid is usually 2 to 15 parts by weight, preferably 5 to 12 parts by weight, per 100 parts by weight of water. Iodine is used as dichroism in the above dyeing treatment step. In the case of a pigment, the boric acid treatment step 8 321524 201022738. The aqueous solution containing boric acid used preferably contains potassium iodide. In this case, the amount of blocking in the aqueous solution containing the acid is usually contained in water per gram by weight. Broken potassium G. i to 15 parts by weight, Preferably, it is 5 to 2 parts by weight. The impregnation time in the aqueous solution containing cerium is usually 6 〇 ^, sec., preferably 150 to 2 seconds, more preferably 4 sec. The temperature is usually 5 (rc or more, preferably 5 to 85, and is 60 to 80 ° C. The rule is preferably in the subsequent water washing treatment step by using the above-mentioned Wei-treated polyethylene resin film For example, the water is washed in water and washed. The temperature of the water to be washed is usually 5 to 4 (rc, and the immersion time is usually 120 seconds. After the water washing treatment, it is usually dried to obtain a polarizing film. It is suitably carried out, for example, by reducing the dryness, the m-line twister, and the like. The drying temperature is usually 3 〇 s1 〇 (rc, compared to 8 (TC. The drying time is usually 6 〇 to _ sec, preferably 12 〇 to coffee seconds.) Thus, the polyvinyl alcohol resin is uniaxially applied. The thickness of the polarizing film is usually /5 to the polarizing plate, and the layered diffusion film having the surface of the polarizing film is formed by stretching, dyeing with a dichroic dye, and performing a cardioic acid treatment and a water washing.丨 丨 接着 接着 扩散 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321

Ethylene terephthalate, polyethylene naphthalate (PEN) polycarbonate, norbornene resin, polyurethane, polyacrylate ), a synthetic polymer such as polymethyl methacrylate; a transparent polymer material such as cellulose diacetate or cellulose triacetate; Further, these polymer materials may contain an ultraviolet absorber, an additive such as an antioxidant or a plasticizer, as needed. Among them, when a diffusion film is produced by the method shown below, for example, polyethylene, polypropylene, polyglycolized ethylene, polyethylene terephthalate, polyethylene naphthalate, and poly are preferably used. A highly hydrophobic thermoplastic resin such as a carbonate, a norbornene-based resin or polymethyl methacrylate. A method of producing a diffusion film by using the transparent polymer material as a substrate is exemplified by a method of including a diffusing agent in a base film, and a layer containing a diffusing agent is applied to one surface or both surfaces of the surface of the base film. Method; and method for roughening a single surface or both sides of a surface of a substrate film (to impart surface irregularities)

Wait. These methods may be used singly or in combination of two or more methods. When a method of including a diffusing agent in a base film is employed, it is only necessary to mix the other diffusing agent into a transparent polymer material as a substrate in advance and to use it as a casting meiihod or an extrusion method. ) and it is especially shaped as a film. When a method of imparting a layer of 1 = diffusing agent to one or both sides of the substrate is used, the polymer material may be first formed into a film by the Pray (5) it method, and then the resin having the diffusing agent dispersed therein may be used. The liquid is coated on the substrate film and is classified as (4) tree material, dried or Wei, and ^ 321524 10 201022738 diffusion film. Alternatively, it is also possible to produce a layer containing a diffusing agent layer on the base film by a co-extrusion method by using a transparent polymer material as a substrate and a transparent polymer material in which a diffusing agent is previously kneaded. The 'diffusion membrane' formed by the Tu structure. In addition, when the method of roughening the surface of the substrate film is used, the transparent polymer material can be first formed into a sheet by casting or extrusion, and then the embossing method is performed by an embossing processing roller. Or the sandblast method is used to roughen the surface to produce a diffusion film. The diffusing agent is not particularly limited as long as it is colorless or white particles, and any of organic particles and inorganic particles can be used. The organic particles may, for example, be particles composed of a polymer compound such as a polyolefin resin such as polystyrene, polyethylene or polypropylene or a polymer resin such as an acrylic resin, or may be a crosslinked polymer. Further, copolymerization of two or more kinds of monomers selected from the group consisting of ethylene, propylene, styrene, methyl acetonate, benzamine, formaldehyde, melamine, butadiene may also be used. a copolymer. The inorganic particles may be, for example, particles composed of ruthenium oxide, silica, or titanium oxide, or may be glass beads. For the resin liquid used in the method of applying the resin liquid in which the above-mentioned diffusing agent is dispersed on the substrate film, a solvent volatilization type or a water volatilization type resin may be used, or a thermosetting type or a photocuring type may be used. Resin solution. A solvent-evaporable or water-volatile resin solution can be used: a polymer such as polyacrylate, polymethyl propyl hydride, polyvinyl chloride, polyethylene acetate, cellulose, or synthetic rubber is dissolved or dispersed in an organic solvent. A resin solution made of solvent or water. The organic 'mixture may, for example, be an alcohol such as methanol, ethanol, propanol or isopropanol; a cellosolve such as Methyl Cellosolve or ethyl cellosolve; A 321524 11 201022738 Benzene, II An aromatic solvent such as toluene; ethyl acetate, di-methane, and the like. When the solvent-evaporable or water-volatile resin liquid is applied to the base film 2, the organic solvent or water is volatilized by drying to form a film. As the oxime-type resin liquid, a resin liquid obtained by mixing a hard liquid composed of a compound having an epoxy group and a compound condensed with an epoxy group such as an amine can be used. As the photocurable resin liquid, a resin liquid obtained by adding a common-group polymerization initiator to a compound having a group or a methyl acrylate group, an aryl group or the like; or a compound having a vinyl group; Adding a known photo-cationic polymerization agent to the hair agent = tree month t: resin liquid may add ultraviolet absorption or anti-gas as needed. "The haze value of the diffusion film is 1% or more, and 卩 5% or more is preferable. More than 90% of the above is preferred. More preferably, it is less than 9〇%. == The higher the line transmittance, the better. Specifically, the diffusion film ==, which is better on 7_, again, in隹 隹 尤其 85 85 85 85 85 85 扩散 扩散 扩散 扩散 扩散 扩散 扩散 扩散 扩散 扩散 扩散 扩散 扩散 扩散 扩散 扩散 扩散 扩散 扩散The left and right are better at 30//m or more and 1 〇〇 "m or less is better. When the film is diffused in the area layer of the polarizing film, the diffusion of one side of the polarizing film occludes the layer which adheres to the polarizing plate as soon as possible, and forms a layer of the adhesive agent. On the opposite side of the surface of the polarizing film to which the diffusion film is bonded, a layer for bonding an adhesive or an adhesive for bonding the liquid crystal cell to the polarizing plate may be formed. Further, a diffusion film such as the above-mentioned diffusion film, 321524 12 201022738 and a transparent film such as a protective film or an optical compensation film may be formed on one surface of the polarizing film, and a layer of an adhesive or an adhesive may be formed on the transparent film. The transparent film may, for example, be a cellulose resin such as a cellulose fiber film such as a triacetyl cellulose (TAC) film, a thin smoke resin film, an acrylic resin film or a polyethylene terephthalate. Membrane and the like. Further, an optical functional film to be described later may be laminated on the transparent film, and a layer of an adhesive or an adhesive may be formed on the optical functional film.纤维素 The cellulose resin constituting the cellulose resin film is a partial S compound or a completely S compound of cellulose, and examples thereof include cellulose acetate, propionate, butyrate, and mixed esters thereof. . Specific examples thereof include cellulose diacetate, cellulose monoacetate, cellulose acetate propionate, cellulose acetate butyrate, and the like. When the cellulose resin is formed into a film, a known method such as a solvent casting method or a melt extrusion method can be suitably used. For the cellulose-based resin, for example, "fujitac TD80" (Fujifilm Co., Ltd.), "fujitac TD80UF" (made by Fujifilm Co., Ltd.), and "fujitac ® T_Z" (Fuji Film Co., Ltd.) , "KC8UX2M" (Konica

Mln〇1〇ta 〇pt〇 company (share) system, “KC8UY” (Konica Minolota Opto Co., Ltd.). Further, the optical compensation film composed of the cellulose resin film can have a phase difference adjustment in the system of the deer tree deer film, and the surface of the cellulose resin film is coated with a phase difference adjustment film. For example, 321524 13 201022738

View Film "WV BZ 438"", "wv film wide view FUm, 'wv EA"" 'Konica Minolta 0pt〇 company's "shares" "KC4FR one, "KC4HR-1" and so on. The thickness of the protective film or the optical compensation film composed of the cellulose resin film is not particularly limited, but is preferably in the range of 20 to 9 Å/m, and preferably in the range of 30 to 90. . If it is thin, it is difficult to handle the film, and if it is thick, the workability is inferior, and it is disadvantageous to the thinness and weight reduction of a polarizing plate.光学 The optical compensation film composed of the above olefin-based resin may, for example, be a cycloolefin-based resin film which is uniaxially stretched or biaxially stretched. In the LCD panel for large LCD TVs, especially with vertical alignment (Verticai)

When the polarizing plate of the present invention is used in the liquid crystal panel of the aligning type VA) liquid crystal cell, the optical compensation film is also suitable for the optical properties and durability from the viewpoint of optical properties and durability. By. Here, the cycloolefin-based resin film refers to a film composed of a thermoplastic resin, and the heat enthalpy contains a door ring of a cycloolefin such as an ice-reducing (tetra) or polycyclic norbornene-based monomer: a monomer unit. The cycloolefin film may be a mono-nuclear ring or a region in which a ring-opening polymer of a ring-reducing m-leather is added to ammonia or the like. ° . In addition, in the case of the introduction of a polar base in the main chain or the branch, the commercially available thermoplastic ring-type flue-cured resin is sold by the German Τ1 cona company, "„Topas for sale”, and JSR company (share). "Apel" (all products 321524 14 201022738 name) sold by "ZE0N" "ZE0NEX", Erbei Ershu, and "Han" / "Ishiji" (sold) sold by Japan Zeon Co., Ltd. This can be used as appropriate. A cycloolefin resin film can be obtained by forming a film of such a cycloolefin resin. As the film forming method, a known method such as a solvent casting method or a melt extrusion method can be suitably used. In addition, for example, "ESSINA" and "SCA40" sold by Sekisui Chemicals Co., Ltd., "ΖΕ0Ν0Α膜" sold by 〇ptes Co., Ltd., and "ART0N film" (both trade names) sold by JSR Co., Ltd. The film-forming cycloolefin resin film is also commercially available, and these can also be suitably used. When the thickness of the optical compensation film composed of the extended cycloolefin resin film is too thick, the workability is poor, and the transparency is lowered or the polarizing plate is not suitable for weight reduction, and is about 20 to 80 / ζ πι. Ideal. An adhesive is used for bonding the polarizing film and the diffusion film, and a protective film or an optical compensation film or a polarizing film which is laminated as necessary. In the present invention, the bonding of the polarizing film and the diffusion film is used. An adhesive composed of a curable composition containing an epoxy resin. Since such a binder is used, the appearance of the polarizing plate is not adversely affected, and the polarizing film can be followed by the adhesion strength south of the film. Further, as the adhesive used for bonding the polarizing film and the protective film or the optical compensation film, a polyethylene glycol-based resin or an amine lysate may be used as a binder to be used, but if it is used and When the adhesive used for bonding the polarizing film and the diffusion film is the same kind of adhesive, the production efficiency can be improved and the type of the disgrace can be reduced. Here, the term "epoxy resin" as used in the present invention means a compound or a polymer having two or more epoxy groups in a molecule and hardened by a polymerization reaction accompanying the epoxy group, according to the field. Conventions, even for the monomer 321524 15 201022738 are also known as epoxy resins. The epoxy resin contained in the curable composition is preferably an epoxy resin containing no aromatic ring in the molecule from the viewpoints of weather resistance, refractive index, and cationic polymerizability. Examples of the epoxy resin which does not contain an aromatic ring in the molecule include a hydrogenated epoxy resin, an alicyclic epoxy resin, and an aliphatic epoxy resin. The hydrogenated epoxy resin can be obtained by selectively hydrogenating an aromatic epoxy resin in the presence of a catalyst under pressure. Examples of the aromatic epoxy resin include bisphenol type of diglycidyl ether of bisphenol ACbisphenol A), diglycidyl hydrazine of bisphenol F, and diglycidyl ether of bisphenol S. Epoxy resin; phenol novolac epoxy resin, cresol novo lac epoxy resin, base benzophenone

A phenolic varnish type epoxy resin such as hydrating phenol novolak epoxy resin (hydrum xy benzaldehyde phen〇1 i^volac epoxy resin) 丨 tetrahydroxydiphenyl fluorene diglycidyl _, tetrapyridyl benzoquinone (10) _ Coffee W f 0Phen〇ne) dimethyl sulphate (tetra), and epoxy-based polyepoxylated p〇lyvinyl _ 〇 1) and other multifunctional epoxy resin II = aromatic, epoxy resin nuclear hydrogenation The system becomes an argonized epoxy tree, and the hydrogenated epoxy resin is preferably a glycidyl ether of hydrogenated bisphenol A. The bisphenol A has at least one epoxy ring with a alicyclic group: a :: base epoxy resin. The "epoxy group bonded to the alicyclic ring" has a structure shown by the following formula, 321524 16 201022738 integer. (CH2)m / 〇 Therefore, the alicyclic epoxy resin means a compound having at least one structure represented by the above formula in the molecule. More specifically, a compound obtained by removing one or a plurality of hydrogen groups from (CH2)m of the above formula and a combination of other chemical structures can be an alicyclic epoxy resin. One or a plurality of hydrazines in (CH2)B may be appropriately substituted with a linear alkyl group such as a mercapto group or an ethyl group. In the above alicyclic epoxy resin, an alicyclic epoxy resin having an oxabicyclohexane ring (m=3 in the above formula) or an oxabicycloheptane ring (m=4 in the above formula) It is suitable because the bonding strength of the polarizing film and the diffusion film is excellent. Hereinafter, the structure of the alicyclic epoxy resin which is more suitable in the present invention is specifically exemplified, but the compounds are not limited thereto. (a) Epoxycyclohexanecarboxylic acid epoxycyclohexylmethyl ester represented by the following formula (I):

(wherein R1 and R2 each independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms). (b) an epoxycyclohexane carboxylate of an alkanediol represented by the following formula (II): 0 0 η 11

Oo (π)

C~〇—(CH2)n~〇~C 17 321524 201022738 (wherein R 3 and R 4 each independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms, and η represents an integer of 2 to 20). (c) Epoxycyclohexylmethicone of the diacids represented by the following formula (III): Ο 0 (Melon) R5 R6 (wherein R5 and R6 independently of each other represent a hydrogen atom or a carbon number of 1 to 5 The linear alkyl group 'p represents an integer of 2 to 20). (d) Epoxycyclohexyl methyl ether of polyethylene glycol represented by the following formula (IV): ^^YCH2 (〇〇2Η4)ς-〇-CH2 ο αν) R7

R (wherein R7 and R8 each independently represent a hydrogen atom or a linear alkyl group having a carbon number of 丨 to 5, and q represents an integer of 2 to 1 )) β (e) an alkanediol represented by the following formula (V) Epoxy cyclohexyl methyl ethers: -CH2-〇-(CH2)r.〇^CH2v^ r9 P° (v) K R10 (wherein R9 and independently of each other ± 0 (four) residual atoms or secrets 1 to 5 The key is said to be a base, and Γ represents an integer from 2 to 20. (1) The following formula (VI): (iv) diguanosyl trispiro compound: vx4 R11 321524 18 (VI) 201022738 (wherein R11 and R12 independently of each other represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms). (g) A diepoxymonospiro compound represented by the following formula (VII): (VII) R13 (wherein R13 and R14 each independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms). (h) Vinylcyclohexene diepoxide represented by the following formula (VIII): (Dish) R15 (wherein R15 represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms). (i) Epoxycyclopentyl ethers represented by the following formula (IX):

(K) (wherein R16 and R17 each independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms). (j) Dicyclooxy tricyclodecane represented by the following formula (X):

(wherein R18 represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms). 19 321524 201022738 Among the alicyclic epoxy resins exemplified above, the following alicyclic cycloaliphatic esters are suitable for use because of the availability of commercially available products or the like, and are more suitable for (10) to heterobicyclo[4'u] An esterified product of gamma burned _3_carboxylic acid with (7) oxa-bicyclo[4'1,0]heptan-3-yl)methanol [in the above formula (1), R1=R2: compound]; (β)4 ~Methyl+oxabicyclo[[,,〇]heptane-3,4(4) and (4-methyl-7-oxa-bicyclo[4,1,0]heptan-3-yl)f alcohol acetate [ In the above formula (1), a compound of Pd-CH3, R2=4-CH3]; an ester of oxabicyclo[4,1,anthracene]heptane-3-carboxylic acid with hydrazine, 2_ethylene glycol [on In the formula (II), a compound of R3=R4=H, n=2]; (D) an esterified product of (7-oxabicyclo[4,1,0]heptan-3-yl)alcohol with adipic acid [In the above formula (III), a compound of r5=r6=H, p=4]; (E) (4-methyl-7-oxabicyclo[4,l 〇]gino-3_yl)methanol and An ester of a diacid [in the above formula (R), a compound of R5=4_CH3, R6=4_CH3, p=4]; (F) (7-oxabicyclo[4, 1,〇]gly-3yl) An esterified product of methanol and i 2 -ethylene glycol [in the above formula (V), R9 = compound of Τ, r, r = 2]. The aliphatic epoxy resin may, for example, be an aliphatic polyhydric alcohol or a polyglycidyl ether of an alkylene oxide adduct. More specifically, it may be, for example, 1,4-butyl Diglycidyl ether of diol, diglycidyl ether of 1,6-hexanediol; triglycidyl hydrazine of glycerol; triglycidyl ether of trimethylolpropane; diglycidyl ether of polyethylene glycol; propylene glycol Diglycidyl ether; obtained by adding one or more alkylene oxides (epoxy 20 321524 201022738 Ethylene or propylene oxide) to an aliphatic polyol such as ethylene glycol, propylene glycol or glycerin. In the present invention, the ring-shaped latex resin may be used singly or in combination of two or more kinds. ^ The epoxy equivalent of the epoxy resin used in the present invention is usually 30. It is preferably in the range of 3'0〇〇g/equivalent, preferably 50 to 丨(10) in equivalents, and when the epoxy equivalent is small, there is a possibility that the flexibility of the adhesive layer after curing is lowered or the strength is lowered. On the one hand, when the epoxy equivalent is large, it has compatibility with other components. In the present invention, from the viewpoint of reactivity, the curing reaction of the epoxy resin is preferably carried out by cationic polymerization. Therefore, it is preferred to formulate a cationic polymerization initiator in the curable composition. The initiator is irradiated or heated by an active energy ray such as visible light, ultraviolet light, X-ray, or electron beam to generate a cationic species or a Lewis acid, and initiates polymerization of an epoxy group. Regardless of the type of cationic polymerization initiator, it is preferable from the viewpoint of workability that the potential is imparted. The cationic polymerization initiator can be roughly classified into a photocationic polymerization initiator and a thermal cationic polymerization initiator, and the photopolymerization hair styling agent generates a cationic species by irradiation with active energy rays such as visible light, ultraviolet rays, X-rays, and electron beams. Lewis acid, the thermal cationic polymerization agent is a person who produces a cationic species or a Lewis acid via heating. Hereinafter, a photocationic polymerization initiator will be described. When a photocationic polymerization initiator is used, the adhesive can be cured at a normal temperature, so that the concern about the heat resistance or the strain caused by the expansion of the 7-light film is reduced, and the diffusion film and the polarizing film can be used. The method of good adhesion is followed. Further, since the photocationic polymerization initiator is subjected to a catalytic action by light, 321524 21 201022738, even if it is mixed with an epoxy resin, it is excellent in storage stability and workability. The photocationic polymerization initiator is not particularly limited, and examples thereof include an anthracene salt such as an aromatic diazonium salt, an iodonium salt, or a sulfonium salt, and an iron-propylene dilute (al). Lene) complex and so on. The aromatic diazonium salt may, for example, be hexafluoroantimonate benzenediazonium rust salt, hexafluorophosphoric acid benzenediazonium rust salt or hexafluoroborate benzenediazonium rust salt. Examples of the aromatic onium salt include diphenylphosphonium tetrakis(pentafluorophenyl)borate, diphenyliodonium hexafluorophosphate, diphenylphosphonium hexafluoroantimonate and hexafluorophosphate. 4-nonylphenyl) phosphonium salt and the like. Examples of the aromatic phosphonium salt include triphenylsulfonium hexafluorophosphate, triphenylsulfonium hexafluoroantimonate, triphenylsulfonium tetrakis(pentafluorophenyl)borate, and 4,4'-double. [Diphenylindenyl]diphenylsulfuric bishexafluorophosphate, 4,4'-bis[di(yS-hydroxyethoxy)phenyl)diphenylsulfonated dihexafluoroantimonate, 4 , 4'-bis[bis(/3-hydroxyethoxy)phenylindenyl]diphenylsulfuric bishexafluorophosphate, 7-[bis(p-fluorenylphenyl)indolyl]-2-isopropyl Thioxanthone hexafluoroate, 7-[bis(p-tolyl)indolyl]-2-isopropylthioxanthone tetrakis(pentafluorophenyl)borate, 4-benzene Alkylcarbonyl-4'-diphenylindolyl-diphenylsulfuric bishexafluorophosphate, 4-(p-tris-butylphenylcarbonyl)-4'-diphenylfluorenyl-diphenylsulfide Fluoride, and 4-(p-tris-butylphenylcarbonyl)-4'-di(p-nonylphenyl)indenyl-diphenylsulfated tetrakis(pentafluorophenyl)borate. Further, as the iron-propadiene complex, for example, diphenylbenzene-cyclopentadienyl iron (II) hexafluoroantimonate, cumene-cyclopentadienyl iron ( II) hexafluorophosphate, and diphenylene-cyclopentadienyl iron (II) tris(trifluoroanthracene 22 321524 201022738 base mercapto) methanide (methanide) and the like. Such a photo-cationic polymerization initiator can be easily obtained from a commercially available product, and examples thereof include "Kayarad PCI-220" and "Kyarad® 1-620" (above, Nippon Kayaku Co., Ltd.). "Liver 1-6990" (111^〇11 Carbide Co., Ltd.), "Adekaoptomer SP-150", "Adekaoptomer SP-170" (above, ADEKA Co., Ltd.), "CI-5102" CIT-1370", "CIT-1682", "CIP-1866S", "CIP-2048S", "CIP-2064S" (above, Sakamoto Soda Co., Ltd.), "DPI-101", "DPI" -102", "DPI-103", "DPI-105", "MPI-103", "MPI-105", "BBI-101", "BBI-102", "BBI-103", "BBI-105" "TPS-101", "TPS-102", "TPS-103", "TPS-105", "MDS-103", "MDS-105", "DTS-102j, "DTS-103" (above) , "Green Chemical Co., Ltd."), "PI-2074" (Rhodia Corporation). Among them, "CI-5102" manufactured by Japan Co., Ltd. is one of the preferred photocationic polymerization initiators. The above photopolymerization initiators may be used singly or in combination of two or more. * In particular, the aromatic eucalyptus collar: the domain also has a purple-absorbing property, so it can be excellent in hardenability. It has good mechanical strength and a cured hardness of four degrees. The compounding amount of the photocationic polymerization initiator is usually 5% to 2 parts by weight, preferably μ by weight, and preferably 15 parts by weight or less. If the amount of blending is small, the hardness of 5 gold or the strength is lowered. X, such as the adjustment of the knife's mechanical eve, the ionic substance of the hardened material 321524 23 201022738 增加 increases, so that the hygroscopicity of the cured product is improved, and the durability of the polarizing plate may be lowered. When a photocationic polymerization initiator is added to the curable composition, a photosensitizer may be further used as needed. By using a photosensitizer, the reactivity can be improved and the mechanical strength or strength of the cured product can be increased. The photosensitizer may, for example, be a carbonyl compound, an organic sulfur compound, a persulfide compound, a redox compound, an azo or a diazo compound, a halide or a photoreductive dye. Specific photo sensitizers include, for example, benzoin methyl ether, benzoin isopropyl ether, α,α-dimethoxy-α-phenylacetophenone, and the like; Benzophenone), 2,4-dibenzophenone, o-benzylidene methyl ester, 4,4'-bis(didecylamino)benzophenone, 4,4,-bis (two a diphenyl fluorenone derivative such as ethylamino)diclofenac; such as a thioxanthone derivative such as 2-monothioxanthone or isopropyl thioxanthone; An anthracene derivative such as 2_methylhydrazine; an acridine derivative such as N-methylacridone or N-butylacridone; others such as ο:, α-二乙Oxyethyl acetophenone, benzil, fluorenone, xanthone 'uranium compound, halide, etc.' are not limited thereto. Further, these photosensitizers may be used singly or in combination. The content of the photosensitizer is preferably in the range of from 1 to 20 parts by weight based on 100 parts by weight of the hardened composite. Next, the thermal cationic polymerization initiator will be described. A hot cationic polymerization-initiated sword which generates a cationic species or a Lewis acid by heating may, for example, be a benzyl sulfonium salt, a thiophenium salt, a thiolanium 24 321524 201022738 salt, or a benzyl ammonium salt. (benzylammonium) salt, pyridinium salt, hydmzinium salt, carboxylate, sulfonate, amine imide, and the like. These initiators can be easily obtained from commercially available products. For example, "Adekaopton CP77" and "Adekaopton CP66" (above 'Asahi Chemical Industrial Co., Ltd.), r Cj_2639" and "Cj_2624" can be listed under the trade names ( Above 'Sakamoto Soda Corporation (shareholding system), "Sunaide SI-60L",

SunaideSI-80L" and "SunaideSIlOOL" (above, Sanxin Chemical Industry Co., Ltd.). It is also a useful technique to use photocationic polymerization and thermal cationic polymerization as described above. The epoxy resin-containing curable composition used as the adhesive in the present invention may further contain a compound which promotes cationic polymerization such as oxetane or polyol. The oxetane is a compound having a 4-membered cyclic ether structure in the molecule, and examples thereof include 3-ethyl-3-hydroxymethyloxetane and 1,4-bisindole [(3-ethyl) 3-oxetanyl)methoxymethyl]benzene, 3-ethyl-3-(phenoxymethyl)oxetane, bis[(3_ethyl_3_oxocyclo) Butanyl)methyl]ether, 3-ethyl-3-(2-ethylhexyloxymethyl) varnish, Luoxuan and phenolic turtle _ / month lacquer oxalate butyl )Wait. These oxacyclopentanes can be easily obtained from commercial products, and can be given, for example, by the trade name.

Aron Oxetane OXT-101", "Aron Oxetane 0XT-121", "Aron Oxetane OXT-211", "Aron Oxetane 0XT-221", "Aron

The amount of Oxetane OXT-212 (all manufactured by East Asia Synthetic Co., Ltd.) is not particularly limited, and is usually 25 321 524 201022738 5 to 95% by weight in the curable composition. In the case of the polyol, it is preferable that the polyol is not an phenolic hydroxyl group, and a polyol compound which does not contain an acidic group other than a hydroxyl group, and a polyester polyol. A compound, a polylactone polyol compound, a polyol compound having a phenolic hydroxyl group, a polycarbonate polyester, and the like. The molecular weight of these polyols is usually 48 or more, preferably 62 or more, more preferably 1 or more, and still more preferably 1 or less. The amount of the polyols to be added is usually 50% by weight or less, preferably 30% by weight or less, based on the curable composition. Further, as long as the effect of the present invention is not impaired, other additives such as an ion trapping agent, an antioxidant, and a chain transfer agent (chain) may be blended in the curable composition used as an adhesive. Transfer agent), sensitizer, adhesive agent, thermoplastic resin, filler, flow regulator, plasticizer, antifoaming agent, and the like. The ion-retaining agent contains, for example, a powdery-based inorganic compound such as a lanthanide, a lanthanide, a magnesium-based, an aluminum-based, a calcium-based, a titanium-based, or the like, and the antioxidant includes, for example, a hindered phenol-based antioxidant. ❹ When bonding the polarizing film and the diffusion film, first, an adhesive composed of a curable composition containing the above epoxy resin is applied to the bonding surface of the polarizing film and/or the diffusion film. The coating method of the adhesive is not particularly limited, and various coating methods such as a doctor blade (d〇ct〇rb 1 ade), a wire-bar coater, and a die coater (die) can be used. Coater), comma coater, gravure coater, and the like. Further, since each coating method has its optimum viscosity range, it is also a useful technique to adjust the viscosity using a solvent. The solvent used for this purpose is particularly limited to use the optical properties of 26 321 524 201022738 and to dissolve the hardenable composition well. An organic solvent such as vinegar represented by the hydrocarbon represented by the example benzene can be used. Next, (10) bonding (4) to the polarizing film, the active energy ray is irradiated or heated, and the formed adhesive layer is cured, and the diffusion film is fixed on the partial f film. The thickness of the cured adhesive layer is usually ·m or less, preferably 20 Å or less, more preferably 10 Å or less. Further, when a protective film or an optical compensation material is bonded to the surface of the polarizing film opposite to the surface on which the diffusion film is laminated, it may be carried out in the same manner. Before the diffusion film, the protective film, and the optical compensation film are bonded to the polarizing film, a corona discharge treatment, a primer treatment, or an anchor may be applied to the bonding surfaces of the films. The coating (anch〇r coating) treatment or the like is easily processed. When the polymerization hardening is performed by irradiation with an active energy ray, the source of the ruthenium used is not particularly limited, and for example, a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp having a light-emitting distribution at a wavelength of 4〇〇11111 or less can be used. Chemical lamps, black light lamps, microwave excited mercury lamps, metal halide lamps, and the like. The light irradiation intensity of the curable composition is determined by the fact that each of the constituents of the object is not particularly limited, but the irradiation intensity in the wavelength range effective for the activation of the initiator is 〇. 1 to 1 〇〇mW. /cm2 is better. The light irradiation intensity of the hardened composition is less than 〇W. lmW/cm2, the reaction time is too long, and when it exceeds 10OmW/cm2, hardening occurs due to heat generated from the lamp and heat generation of the curable composition during polymerization. The yellowing of the composition or the deterioration of the polarizing film is 27 321524 201022738 possibility. When the light-irradiating composition is irradiated with light, the object is controlled, and although there is no limit of the general-hardening composition Masg Π Π ^ ^ ^ *, the cumulative light expressed by the product of the irradiation intensity and the injection time is 5,000 mJ/cm2 is preferred. The amount of accumulated light of the hardened fine 铷 铷 ” ” ” ” ” ” 丨 丨 丨 丨 / / / / / / / / 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉 拉At the time of mJ/cn]2, it is always long when it is irradiated, which is not conducive to improving productivity. When the polymerization is carried out while it is hot, it can be heated by a generally known method, and the conditions thereof::, and, in particular, the thermal cation-initiator which is usually formulated in the curable composition produces % ion species or Lewis acid. Heating is carried out above the temperature, usually at 50 to 200 Torr. Further, it is preferable to cure the polarizing plate such as the polarizing degree, the transmittance, the hue of the polarizing film, or the transparency of the diffusion film protective film and the optical compensation film, under the conditions of irradiation or heating of the active energy ray. Hardening is performed within a range where the function is not lowered. In the polarizing plate of the present invention, it is preferable that the diffusion film of the two-layer layer of the polarizing film has an adhesive layer on the diffusion film on one side. In the present invention (when the film is diffused in the area of the polarizing film, when a protective film or an optical compensation film is laminated on the other surface, it is on the film), there is an adhesive layer inflammatory agent, ' Ma Jia. The adhesive to be used in such an adhesive layer, such as propylene, is not particularly limited, and a conventionally known suitable adhesive can be used, and examples thereof include an adhesive, an amine ester adhesive, and a polyoxygen adhesive. From the viewpoints of transparency, adhesion, reliability, reworkability, etc., it is applicable to the use of two ingredients, the - spear. The adhesive layer can be applied to a substrate film (for example, a polarizing film or the like) by a mold coater or a cloth machine or the like by applying the adhesive 28 321 524 201022738 as an organic solvent solution, and drying it. The method and i, the second = can also be carried out by transferring the sheet-like adhesive formed on the plastic which has been subjected to the release treatment to the substrate film. The thickness of the adhesive layer is not particularly limited, and is preferably in the range of 2 to 40 #m. The optical work film can be bonded to the surface of the polarizing plate on which the adhesive layer is formed. The optical functional film may, for example, be an optical film, which is a film-coated polarizing film which is coated with a liquid crystal compound on the surface of the substrate and which transmits a polarized light and reflects polarized light having opposite properties. The retardation film is composed of a polycarbonate resin, a retardation film made of a cyclic polyolefin resin, and an antiglare film having a bump on the surface. Shape; a film with a function of preventing surface reflection; a reflective film having a reflective function on the surface; and a semi-transmissive semi-reflective film having both a reflective function and a transmissive function; The product of the optical compensation of the liquid crystal compound which is coated with the liquid crystal compound on the surface of the substrate is exemplified by "Finished Film" (made by Fujifilm Co., Ltd.) and "Nippon Oil Co., Ltd." (Stock) system Λ Γ 臈 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 四 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 For example, "dbef" (made by 3M company, acquired by Sumitomo 3M Co., Ltd. in Japan), "ApF" (made by 3M company, acquired by Sumitomo 3M Co., Ltd. in Japan), etc. In addition, as a commercial product of the retardation film which consists of a cyclic-polyolefin-type resin, the "Art〇n film" (made by JSR company), and "Essina" (S.. Shares), "Zeonoa Film" (Optes Co., Ltd.), etc. The polarizing plate of the present invention can be suitably used as a back side polarizing plate disposed between a liquid crystal cell and a backlight provided in the liquid crystal display device. <Liquid Crystal Panel and Liquid Crystal Display Device> The liquid crystal panel of the present invention includes a liquid crystal cell and the above-described polarizing plate of the present invention, and a film is diffused in one layer of the polarizing film of the polarizing plate, and the polarizing film and the laminated layer are provided thereon. An area layer liquid crystal cell on the opposite side of the surface of the diffusion film. The polarizing plate and the liquid crystal cell are usually bonded via the aforementioned adhesive layer. The liquid crystal panel of the present invention is generally applied to a liquid crystal display device such that the diffusion film is on the backlight side (the polarizing plate of the present invention is disposed between the liquid crystal cell and the backlight). In the liquid crystal panel of the present invention, a polarizing plate is usually provided on the front side of the liquid crystal cell (this is the side opposite to the side where the liquid crystal display device is applied, and the side of the polarizing plate of the present invention is laminated). The polarizing plate provided on the front side of the liquid crystal cell is not particularly limited, and a conventionally known polarizing plate can be suitably used. For example, a polarizing plate which is subjected to an anti-glare treatment, a hard coat treatment, or an anti-reflection treatment may be mentioned. Further, it may be a polarizing plate having a polyethylene terephthalate film, an acrylic film, or a polypropylene film in a single-layer layer of the polarizing film. The liquid crystal display device of the present invention includes a liquid crystal panel that is disposed such that the diffusion film is disposed on the backlight side. In the liquid crystal display device of the present invention, since the liquid crystal panel in which the polarizing plate of the present invention is laminated on the back surface side of the liquid crystal cell is provided, the polarizing film and the diffusion film are excellent in adhesion strength and high in durability. It has sufficient mechanical strength in response to flaking, and further, the diffusion film of the polarizing plate 321524 201022738 of the present invention is disposed on the back side of the liquid crystal panel, so that the adhesion between the north liquid crystal panel and the backlight system can be prevented. Improve visibility even more. In the liquid crystal display device of the present invention, a configuration of a conventionally known liquid crystal display device is employed for the configuration τ other than the liquid crystal panel. For example, a backlight, a light diffusing plate, and the liquid crystal panel of the present invention are sequentially provided. And a configuration including a backlight, a light diffusing plate, a light diffusing sheet, and the liquid crystal panel of the present invention described above. In the case of the former, the liquid crystal panel is disposed such that the diffusion film and the light diffusion plate face each other, and in the latter case, the liquid crystal panel is disposed such that the diffusion film diffusion sheets of the polarizing plate face each other. In the liquid crystal display device of the present invention, since the polarized light of the present invention used as the back side polarizing plate has a light diffusing property, a part or all of the conventional diffusing sheet provided on the light diffusing plate can be omitted. Therefore, it is possible to reduce the weight of the liquid crystal and the optical thin plastic. EMBODIMENT OF THE DEVICE φ Hereinafter, the present invention will be described in more detail by way of examples, but the invention is not limited thereto. Further, in the examples, the contents and the amounts of use and the amounts I used are not as specific as those on the basis of weight. In the following: The value measured by the haze meter HM-150 (manufactured by Murakami Color Research Co., Ltd.) according to JIS K7136. (Production Example: Production of Polarizing Film) A polyvinyl alcohol film having an average degree of polymerization of about 2,400, a degree of saponification of 99. 9 mol% or more and a thickness of 75/m composed of ethoxylated alcohol was impregnated in 3^' water. 'In a solution of 3 (TC) dipped in moth / male potassium / water in an aqueous solution of 321524 31 201022738 0.02 / 2 / 100. After that, it was impregnated with potassium iodide / boric acid / water at 56 5 < 3c The weight ratio is 12/5/1 〇〇 in an aqueous solution. Then, after washing with 8 of its pure water, it is dried underneath to obtain a polarizing film which is sucked on the polyethylene film to the iodine. The extension is mainly in In the step of iodine dyeing and boric acid treatment, the total stretching ratio is 5.3 times. <Example 1> Measured in a 100 mL cup. jag of japan Ep0Xy Resjn male = (stock) hydrogenated epoxy The product name of the resin is rEpic〇atYX8〇〇〇" (nuclear, diglycidyl ether of bismuth A, containing about 2〇5g/eq. of epoxy group 13), 4. 日本g of Japan's Soda Corporation ( The trade name of the photo-cation initiator made by the company is "CI5102", and the trade name of the photo-sensitizer made by Japan's Soda Co., Ltd. "CS7001" is called, and is mixed and defoamed to prepare an adhesive agent formed of a curable composition containing an epoxy resin. Next, 'the side of the polarizing film obtained by the above method is bonded via the above-mentioned adhesive. a diffusion film having a thickness of 80 #m and a haze of 15% (acrylic beads having an average particle diameter of 5/m in a polycarbonate resin, and formed into a film by a melt extrusion method), and A cellulose triacetate film (thickness: 80/zm, manufactured by Konica Minolta Opto Co., Ltd.) was bonded to the above-mentioned adhesive. Next, it was irradiated with ultraviolet rays by a Japanese battery company at a line speed of 1.0 m/min. The device (the ultraviolet lamp was set to use "HAL400NL", ", and the radiation distance was set to 50 cm) once", and the adhesive layer formed on both surfaces of the polarizing film was cured to obtain a polarizing plate. The polarizing film of the obtained polarizing plate was The diffusion film is tightly bonded, and has a good appearance, and the hardenability of the adhesive is also good. Further, the diffusion film is evaluated for the flaw of the film of 32 321 524 201022738 by the checkerboard method described in JIS Κ 5400. Relative to The ratio of the number of checkerboards, the number of unpeeled checkerboards is #100/100, and the adhesion is good. Secondly, on the outside of the cellulose triacetate film of the polarizing plate, an acrylic system having a thickness of 25# m is provided. a layer of an adhesive, which is then bonded to the back surface of the liquid crystal cell via the adhesive layer, and a commercially available polarizing plate is attached to the front surface of the liquid crystal cell to assemble a liquid crystal panel, which is combined with a commercially available light diffusing plate. The backlights are combined to produce a liquid crystal display. By visually observing the display of the liquid crystal display device, bright artifacts are obtained from the front, and the visibility is good. <Example 2> In addition to using a diffusion film having a thickness of 100//m and a haze of 86% (in a resin composition containing an acrylic polyol, an isocyanate, a mercaptoethyl ketone, and a methyl group, the mixed average particle diameter is 20) a coating liquid was prepared by using an acrylic bead of /zm, and the coating liquid was applied onto a surface of a base film made of a transparent polyester having a thickness of 100 μm to prepare a film instead of a thickness of 8 〇// A polarizing plate was obtained in the same manner as in Example i except that a haze film having a haze of 15% was used. The polarizing film of the obtained polarizing plate was closely bonded to the diffusion film, and had a good appearance, and the hardenability of the adhesive was also good. Further, when the adhesion of the diffusion film to the polarizing film is evaluated by the checkerboard method described in JIS K 5400, the ratio of the number of undivided checkerboards is 100/100 with respect to the number of formed checkerboards. Good adhesion. • Next, a layer of a thick acrylic adhesive is provided on the outside of the cellulose triacetate film. Then, the adhesive layer is disposed on the back surface of the liquid crystal cell, and a commercially available polarizing plate 321524 33 201022738 is disposed on the front surface of the liquid crystal cell to be assembled into a liquid crystal panel, which is combined with a commercially available light diffusing plate and a backlight. A liquid crystal display device was produced by combining them. When the display of the liquid crystal display device is visually observed, a bright image is obtained from the front, and the visibility is good. <Comparative Example 1> A polarizing plate was produced in the same manner as in Example 1 except that an aqueous amine ester adhesive was used instead of the adhesive composed of the hardened composition containing the epoxy resin. As a result, a large gap is generated between the polarizing film and the diffusion film, and a polarizing plate having a good appearance cannot be produced. Further, the diffusion film in the obtained polarizing plate can be easily peeled off by hand, and is not completely attached to the polarizing film. The embodiments and examples described in the present invention are to be considered as illustrative and not restrictive. The scope of the present invention is not intended to be limited by the scope of the invention, but is intended to be [Possibility of Industrial Applicability] According to the present invention, it is possible to provide a polarizing plate and a liquid crystal panel, wherein the diffusion film and the polarizing film have high bonding strength and have excellent light diffusibility. Moreover, according to the present invention, it is possible to reduce the thickness of the liquid crystal display device and the number of components. The liquid crystal display device of the present invention can be suitably used for a liquid crystal display device for a large-surface liquid crystal television, and more particularly, a liquid crystal display device for a liquid crystal television which can be hung on a wall. [Simple diagram description] None [Main component symbol description] None 34 321524

Claims (1)

201022738 VII. Patent application scope: 1. A polarizing plate which is provided with a polarizing film and a diffusing film, wherein the polarizing film is a uniaxially stretched polyvinyl alcohol resin which is adsorbed and assigned with iodine or a dichroic dye. a film formed by laminating an adhesive layer on at least one surface of the polarizing film and having a haze of 1% or more, and the adhesive layer is composed of a cured product of a curable composition containing an epoxy resin. By. 2. The polarizing plate of claim 1, wherein the epoxy resin is an epoxy resin having no aromatic ring in the molecule. 3. The polarizing plate of claim 1 or 2, wherein the polarizing film is one layer of the polarizing film, and the other is an optical compensation film or a protective film. 4. The polarizing plate according to any one of claims 1 to 3, wherein the diffusing film has a haze of 5% or more. 5. The polarizing plate according to any one of claims 1 to 4, wherein the polarizing plate is disposed between the liquid crystal cell of the liquid crystal display device and the backlight. 6. A liquid crystal panel comprising a liquid crystal cell and a polarizing plate according to any one of the first to fifth aspects of the present invention, wherein a diffusion film is formed on one of the polarizing films of the polarizing plate, and The polarizing film is laminated with an area layer on the opposite side of the surface of the diffusion film. 7. A liquid crystal display device comprising a backlight, a light diffusing plate, and a liquid crystal panel of the sixth application of the patent application, wherein the liquid crystal panel is configured to diffuse the diffusion film 35 321524 201022738 of the polarizing plate and the light diffusion The board is configured in a relatively directional manner. 8. A liquid crystal display device comprising a backlight, a light diffusing plate, a light diffusing sheet, and a liquid crystal panel of claim 6 in a liquid crystal panel, wherein the liquid crystal panel is such that the diffusing film of the polarizing plate and the light are The diffusion sheet is disposed in a relatively opposed manner. ❹ 36 321524 201022738 IV. Designated representative map: There is no schema in this case (1) The representative representative map of this case is: (). (2) A brief description of the symbol of the representative figure: 5. If there is a chemical formula in this case, please disclose the chemical formula that best shows the characteristics of the invention: This case does not represent the chemical formula 321524