TW201020306A - Optical film with adhesive and optical laminate using same - Google Patents

Abstract

Disclosed is an optical film with adhesive wherein an adhesive layer (20) formed from a composition that contains (A), (B), and (C) is provided on an optical film (10). (A) 100 parts by weight of an acrylic resin that is a copolymer of a monomer mixture that contains: (A-1) 80-96 wt% of a (meth)acrylic acid ester with formula (I) (I) (R1 is hydrogen or a methyl, and R2 is a C1-14 alkyl), (A-2) 3-15 wt% of an unsaturated monomer that has an aromatic ring and one olefinic double bond in the molecule, and (A-3) 0.1-5 wt% of an unsaturated monomer that has a polar functional group, where the weight average molecular weight (Mw) of the acrylic resin is 1,000,000 to 2,000,000 and the molecular weight distribution (Mw/Mn) is 3 to 7. (B) 0.2-8 parts by weight of an ionic compound that has ionic cations and the melting point of which is no more than 80 C. (C) 0.01-5 parts by weight of a crosslinking agent.

Description

201020306 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to an optical film forming an adhesive layer. As the optical film to be the object of the present invention, for example, a polarizing plate or a retardation film can be exemplified. The present invention is also directed to an optical laminate for liquid crystal display using an optical film forming the adhesive layer. Lu [Prior Art] A polarizing plate is mounted on a liquid crystal display device by laminating a transparent protective film on both sides of a polarizing element, forming an adhesive layer on at least one surface of the protective film, and adhering a release film on the adhesive layer. The state is distributed and widely used. Further, a laminated retardation film on a polarizing plate in which a protective film is adhered to both surfaces of the polarizing element is used as an elliptically polarizing plate, and an adhesive layer/release film is attached to the retardation film side. Further, an adhesive layer/release film is also attached to the surface of the retardation film. Adhesion is applied to the liquid crystal cell, and the release film is peeled off from the polarizing plate, the elliptically polarizing plate, and the retardation film, and adhered to the liquid crystal cell through the exposed adhesive layer. These polarizing plates, elliptically polarizing plates, or retardation films are expected to develop countermeasures against the occurrence of static electricity when the release film is peeled off and adhered to the liquid crystal cell. One of the countermeasures is disclosed in Japanese Laid-Open Patent Publication No. Hei 6-3 1 3 8 07 (Patent Document 1), in which a protective film is laminated on the surface of the polarizing element film, and a polarizing plate is provided on the surface of the protective film. As the adhesive, a composition comprising an ion conductive composition composed of an electrolyte salt and an organic polysiloxane and an acrylic-5-201020306 copolymer is used. By using the adhesive, although the antistatic property can be exhibited, the performance is not necessarily sufficient, and the adhesion durability is insufficient. On the other hand, an organochlorine-based antistatic agent is added to a pressure-sensitive adhesive (adhesive) to impart an antistatic property to the pressure-sensitive adhesive (Adhesive). Japanese Patent Publication No. 2004-1 1 4665 (Patent Document 3) discloses that a salt composed of a quaternary ammonium cation having a total carbon number of 4 to 20 and an anion containing a fluorine atom is contained in an adhesive or the like. Sex. Further, JP-A-2006-307238 (Patent Document 4) discloses that an ionic liquid which becomes a liquid at room temperature (25 ° C) is contained in the adhesive to achieve antistatic. However, when the polarizing plate coated with the adhesive is left for a long period of time, the antistatic property may be deteriorated due to the change with time. Generally speaking, the circulation and storage period of the polarizing plate can be freely produced for up to six months. Therefore, it is required to maintain antistatic performance between the customers before use. Further, the optical film with an adhesive as described above is adhered to the liquid crystal cell as a liquid crystal display device on the side of the adhesive layer, but is placed in a state of high temperature 0 or high temperature and high humidity in this state, and is repeatedly heated and cooled. Since foaming occurs in the adhesive layer accompanying the change in the size of the optical film, floating or peeling occurs between the optical film and the adhesive layer, or between the adhesive layer and the liquid crystal cell, therefore, it is required These defects are produced and are excellent in durability. Further, when exposed to a high temperature, the residual stress distribution caused by the optical film becomes uneven, and as a result of stress concentration at the outer periphery of the optical film, it is called white at the outer peripheral portion when it is displayed in black. White phenomenon, but there is a situation of uneven color, so it is also required to suppress • 6 - 201020306 such whitening or uneven color. Furthermore, when the optical film with the adhesive is adhered to the liquid crystal cell, the adhesive film is accompanied by the optical layer from the temporary peeling of the optical film to the re-adhesion of the new film in the case of incomplete adhesion. The film is peeled off together, and the adhesive does not remain on the liquid crystal cell glass, and the so-called reworkability such as blurring does not occur. In Japanese Laid-Open Patent Publication No. H07-1-38056 (Patent Document 5), a monomer containing an aromatic ring is copolymerized in an alkyl acrylate, and the obtained resin has a weight average molecular weight (Mw) and a number average molecular weight ( The ratio of Μη) (M w/Mn) indicates a method in which the molecular weight distribution is expanded to 10 to 50, thereby suppressing light leakage. By using the adhesive, light leakage can be alleviated, but enthalpy cannot be said to be sufficient, and foaming may occur under high temperature conditions due to an increase in molecular weight distribution. CITATION LIST PATENT DOCUMENT PATENT DOCUMENT PATENT DOCUMENT PATENT DOCUMENT PATENT DOCUMENT PATENT DOCUMENT PATENT DOCUMENT PATENT DOCUMENT PATENT DOCUMENT PATENT DOCUMENT [Problem to be Solved by the Invention] [Problem to be Solved by the Invention] An object of the present invention is to provide a high antistatic property imparted to 201020306 which is provided on the surface of an optical film. An optical film of an adhesive attached to an adhesive layer which is excellent in antistatic property over time and which is excellent in suppression of large whitening. As a result of intensive research to solve the problem, the present inventors have found that an acrylic resin containing a structural unit derived from an unsaturated monomer containing an acrylate as a main component and having an aromatic ring in a molecule, and a specific one are prepared. The ionic compound is provided on an optically thin surface as an adhesive layer, whereby an optical film with an adhesion preventing agent, an antistatic property, and an excellent durability is obtained, and the present invention has been completed. [Means for Solving the Problem] That is, the present invention is an optical film with an adhesive attached to an optical film of an adhesive layer forming an adhesive layer on at least one side of an optical film, characterized in that the adhesive layer is An adhesive composition containing the following components, and the adhesive layer has a gel fraction of 7 〇 to 99% by weight: 1 〇〇 by weight of (A) a weight average molecular weight Mw of 1 million to 2,000,000, molecular weight An acrylic resin having a distribution Mw/Mii (ratio of weight average molecular weight (Mw) and number average molecular weight (?η)) of 3 to 7 obtained from a monomer mixture containing the following (Α-1) to (Α-3) Copolymer, 80 to 9.6 wt% (human-1) (meth) acrylate represented by the following formula (1): [Chemical 1]

CH2=C—C_〇-R2 II 0 201020306 (wherein I represents a hydrogen atom or a methyl group, and R2 represents an alkyl group having 1 to 14 carbon atoms which may be substituted by an alkoxy group of a carbon number), 3 〜15% by weight of (A-2) an unsaturated monomer having an olefinic double bond and at least one aromatic ring in the molecule, and 0.1 to 5% by weight of (A-3) an unsaturated monomer having a polar functional group 0.2 to 8 parts by weight of (B) an ionic compound having an organic cation and having a melting point of 80 ° C or less; and 0.01 to 5 parts by weight of the (C) crosslinking agent. Further, according to the present invention, there is provided an optical laminate in which the optical film of the above-mentioned adhesive is laminated on the glass substrate with the adhesive layer side. [Effect of the Invention] In the present invention, an acrylic resin (A) having an olefinic double bond # and at least one aromatic ring unsaturated monomer (A-2) as a constituent component, and an organic cation are used. The composition of the ionic compound (B) having a melting point of 80 t or less is used as an adhesive composition for forming an adhesive layer, and since it can prevent optical defects caused by uneven stress distribution, it can suppress whitening and can effectively suppress The charging of the optical components maintains the initial antistatic performance even after long-term storage after fabrication. Moreover, in the case where the optical film with the adhesive of the present invention is laminated on the glass substrate temporarily, if there is any mismatch, even if the adhesive is peeled off from the glass substrate at the same time, the surface of the peeled glass substrate is also Rarely -9 - 201020306 The paste remains or is blurred, and it can be used again as a glass substrate, and it is excellent in reworkability. Further, the optical film with an adhesive of the present invention can be effectively prevented as an optical laminate by using an acrylic resin (A) having a molecular weight distribution (Mw/Mn) of 3 to 7 as an adhesive composition for forming an adhesive layer. When it is white, it can also prevent defects such as foaming under high temperature conditions. Furthermore, by setting the gel fraction of the adhesive layer to 70 to 99% by weight, the durability of the adhesive layer can be improved, and the optical film of the adhesive can be adhered to the glass substrate of the liquid crystal cell. In the state, the change in appearance when subjected to tests such as heat resistance, moist heat resistance, and impact resistance can be suppressed. The optical film to which the adhesive is applied is laminated, for example, on a glass substrate of a liquid crystal cell to obtain an optical laminate for liquid crystal display. The optical laminate can absorb and alleviate stress caused by dimensional changes of the optical film and the glass substrate under wet heat conditions, thereby reducing local stress concentration and suppressing floating or peeling of the adhesive layer on the glass substrate. . [Embodiment] Hereinafter, the present invention will be described in detail. The optical film with an adhesive of the present invention is an adhesive layer formed on at least one side of the optical film, and the adhesive composition forming the adhesive layer is formed of a composition comprising the following components: (A) acrylic resin, ( B) an ionic compound having an organic cation and having a melting point of 80 ° C or less, and (C) a crosslinking agent. -10- 201020306 First, each component constituting the adhesive composition will be described. [Acrylic Resin (A)] The acrylic resin (A) used in the adhesive composition of the optical film with an adhesive of the present invention is a structural unit derived from the (meth) acrylate represented by the above formula (I). The main component, but specifically, includes a structure derived from an unsaturated monomer having an olefinic double bond and at least one aromatic ring in the molecule φ in addition to the structural unit derived from (meth) acrylate. The unit, an unsaturated monomer derived from a polar functional group having a heterocyclic group represented by a free carboxyl group, a hydroxyl group, an amine group or an epoxy ring, preferably contains a (meth)acrylic acid derived from a polar functional group. The structural unit of the compound. Here, the term "(meth)acrylic acid" means any one of acrylic acid or methacrylic acid. Further, "(meth)" when it is called (meth) acrylate or the like has the same meaning. In the above formula (I) which is a main structural unit of the acrylic resin (A), Ri is a hydrogen atom or a methyl group, and R2 is an alkyl group having 1 to 14 carbon atoms. The hydrogen atom in each of the alkyl groups represented by R2 may be substituted by an alkoxy group having 1 to 10 carbon atoms. In the (meth) acrylate (A-1) represented by the formula (I), R 2 is an unsubstituted alkyl group, and specifically exemplified as methyl acrylate, ethyl acrylate, propyl acrylate, or acrylic acid. a linear alkyl acrylate of butyl acrylate, n-octyl acrylate or undecyl acrylate; a branched alkyl acrylate such as isobutyl acrylate, 2-ethylhexyl acrylate or isooctyl acrylate; such as methacrylic acid a linear linear alkyl methacrylate of methyl ester, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, n-octyl methacrylate, undecyl-11-201020306 methacrylate; For example, isobutyl methacrylate, 2-ethylhexyl methacrylate, branched methacrylate of isooctyl methacrylate, and the like. In the above, n-butyl acrylate is preferred. Specifically, among all the monomers constituting the acrylic resin (A), n-butyl acrylate is 50% by weight or more and the above (meth) acrylate (A) is satisfied. -1) Relevant regulations. When R 2 is an alkyl group substituted with an alkoxy group, that is, an alkoxyalkyl group, the (meth) acrylate represented by the formula (I) is specifically exemplified as 2-methoxyethyl acrylate. Ethoxyethyl acrylate, 2-methoxyethyl methacrylate, ethoxymethyl methacrylate, and the like. These (meth) acrylates may be used singly or in combination of plural kinds and copolymerized. The unsaturated monomer (A-2) having an olefinic double bond and at least one aromatic ring in the molecule preferably has a (meth) acrylonitrile group as a base containing a dilute double bond. Examples thereof are benzyl (meth) acrylate, neopentyl diol benzoate (meth) acrylate, etc., but it is preferably an unsaturated monomer represented by the following formula: [Chemical 2]

FU r3 (Π) wherein R3 represents a hydrogen atom or a methyl group, η is an integer of 1 to 8, and r4 represents a hydrogen atom, an alkyl group, an arylalkyl group or an aryl group of 201020306. When R4 is an alkyl group, the carbon number thereof may be about 1 to 9, and when it is an aralkyl group, the carbon number may be about 7 to 11, and when it is an aryl group, the carbon number may be about 6 to 10. . The alkyl group having 1 to 9 carbon atoms is exemplified by a methyl group, a butyl group or a fluorenyl group, and the aralkyl group having a carbon number of 6 to 11 is exemplified by a benzyl group, a phenethyl group, a naphthylmethyl group or the like, and the carbon number is 6 to 1. The aryl group of hydrazine is exemplified by phenyl, tolyl, naphthyl and the like. Specific examples of the unsaturated monomer of the formula (II) include (meth)acryloic acid 2-phenoxyethyl ester, 2-(2-phenoxyethoxy)ethyl (meth)acrylate, and a ring. (meth) acrylate of nonylphenol modified with oxyethylene, 2-(o-phenylphenoxy)ethyl (meth)acrylate, and the like. The olefinic double bond and the at least one aromatic ring unsaturated monomer in the molecule may be used singly or in combination of plural kinds. Among these, it is preferred to use 2-phenoxyethyl (meth)acrylate or 2-(o-phenylphenoxy)ethyl (meth)acrylate as the aromatic ring constituting the acrylic resin (A). One of the unsaturated monomers (A-2). Examples of the unsaturated functional monomer (A-3) having a polar functional group are exemplified by an unsaturated monomer having a free carboxyl group such as acrylic acid, methacrylic acid or acrylic acid; 8-carboxyethyl ester; for example, (meth)acrylic acid 2-hydroxyethyl ester, 2-hydroxypropyl (meth)acrylate, 2- or 3-chloro-2-hydroxypropyl (meth)acrylate, diethylene glycol mono(meth)acrylate, having a hydroxyl group Unsaturated monomer; such as acryloyl morpholine, vinyl caprolactam, N-vinyl-2-pyrrolidone, tetrahydrofurfuryl (meth) acrylate, caprolactone modified tetrahydroanthraquinone Esters, 3,4-epoxycyclohexylmethyl (meth)acrylate, glycidyl (meth)acrylate, 2,5-dihydrofuran,-13-201020306 unsaturated monomer having a heterocyclic group; For example, N,N-dimethylaminoethyl (meth)acrylate has an unsaturated monomer having an amine group different from the heterocyclic ring. The polar functional group-containing unsaturated monomers may be used singly or in combination of plural kinds. The polar functional group of the unsaturated monomer (A-3) is preferably a free carboxyl group, a hydroxyl group or an amine. Base or epoxy group. Among them, an unsaturated monomer having a hydroxyl group is preferably used as one of the polar functional group-containing unsaturated monomers (A-3) constituting the acrylic resin (A). Further, in addition to the unsaturated mono-Q body having a hydroxyl group, it is also effective to use an unsaturated monomer having another polar functional group, for example, an unsaturated monomer having a free carboxyl group. The content of the (meth) acrylate (A-1) represented by the above formula (I) in the acrylic resin (A) is 80 to 96% by weight, preferably 82% by weight or more, more preferably 85% by weight. The above is preferably 94% by weight or less, more preferably 92% by weight or less. The content of the unsaturated monomer (A-2) having an olefinic double bond and at least one aromatic ring in the molecule is 3 to 15% by weight in the acrylic resin (A), but preferably 5% by weight or more, more preferably 5.5% by weight or more, more preferably 7% by weight or more, still more preferably 12% by weight or less, more preferably 9.9% by weight or less, still more preferably 9.5% by weight or less, still more preferably 9% by weight or less. . The content of the unsaturated functional monomer (A-3) having a polar functional group in the acrylic resin (A) is 0.1 to 5% by weight, preferably 0.5% by weight or more, more preferably 3% by weight or less. The acrylic resin (A) used in the present invention also contains (meth) acrylate (A-1) represented by the above formula (I) in addition to the above, having an olefinic double bond and at least one aromaticity in the molecule. Ring-unsaturated mono-14- 201020306 The structural monomer of the monomer other than the unsaturated monomer (A-2) having a polar functional group (A-2). Examples of such an example are a structural unit derived from a (meth) acrylate having an alicyclic structure in a molecule, a structural unit derived from a styrene monomer, a structural unit derived from a vinyl monomer, and a molecular derived molecule. A structural unit having a plurality of (meth) acrylonitrile groups therein. The alicyclic structure is a cycloalkane structure having a carbon number of usually 5 or more, preferably about 5 to 7. Specific examples of the acrylate having an alicyclic structure φ are isobornyl acrylate, cyclohexyl acrylate, dicyclopentanyl acrylate, cyclododecanol acrylate, methylcyclohexyl acrylate, trimethylcyclohexyl acrylate Ester, t-butylcyclohexyl acrylate, cyclohexyl α-ethoxyacrylate, cyclohexyl phenyl acrylate, and the like. Specific examples of the methacrylate having an alicyclic structure are exemplified isobornyl methacrylate, cyclohexyl methacrylate, dicyclopentanyl methacrylate, cyclododecyl methacrylate, and methacrylic acid. Cyclohexyl ester, trimethylcyclohexyl methacrylate, t-butylcyclohexyl methacrylate, cyclohexyl phenyl methacrylate, and the like. Examples of the styrene monomer include, in addition to styrene, methyl styrene, dimethyl styrene, trimethyl styrene, ethyl styrene, diethyl styrene, triethyl styrene, Alkyl styrene of propyl styrene, butyl styrene, hexyl styrene, heptyl styrene, octyl styrene; such as fluorostyrene, chlorostyrene, bromostyrene, dibromostyrene, iodine styrene The halogenated styrene; further examples thereof are nitrostyrene, ethyl styrene styrene, methoxy styrene, divinyl benzene, and the like. Examples of the vinyl monomer are, for example, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, vinyl laurate, fatty acid-15-201020306 vinyl ester; such as vinyl chloride or A vinyl halide of ethylene bromide; a vinylidene halide such as vinylidene chloride; a nitrogen-containing aromatic vinyl such as vinyl pyridine, vinyl pyrrolidone or vinyl carbazole; such as butadiene or isoprene The conjugated diene monomer of chloroprene; furthermore, acrylonitrile, methacrylonitrile or the like can be exemplified. Examples of the monomer having a plurality of (meth) acrylonitrile groups in the molecule can be exemplified by, for example, I,4-butanediol di(meth)acrylate, 1,6·hexanediol di(meth)acrylate. 1,9-nonanediol di(meth)acrylate, ethanediol di(meth)acrylate, diethylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylic acid a monomer having two (meth) acrylonitrile groups in the molecule of an ester or tripropylene glycol di(meth) acrylate; for example, trimethylolpropane tri(meth) acrylate has three molecules in the molecule (methyl group) a monomer of acrylonitrile. (meth) acrylate (A-1) represented by the above formula (I), an unsaturated monomer (A-2) having an olefinic double bond and at least one aromatic ring in the molecule, and a polar functional group The monomers other than the unsaturated monomer (A-3) may be used singly or in combination of two or more. The structural unit derived from the monomers other than the above (A-1) to (A-3) usually contains 0 to 20 parts by weight, preferably 0 to 10 parts, per 100 parts by weight of the nonvolatile matter of the acrylic resin (A). The proportion by weight. The active ingredient of the adhesive may be one or more types including the (meth) acrylate (A-1) derived from the formula (I) as described above, having one olefinic double bond and at least one aromatic group in the molecule. The structure of the cyclic unsaturated monomer (A-2), and the unsaturated functional monomer (A-3) having a polar functional group - 16 to 20,020,306 units of acrylic resin. Further, the acrylic resin may be an acrylic resin different from the above, and specifically, for example, an acrylic resin having a structural unit derived from the (meth) acrylate of the formula (I) and containing no polar functional group. And a (meth) acrylate (A-1) represented by the formula (I), an unsaturated monomer having an olefinic double bond and at least one aromatic ring in the molecule (A-2), and a polar functional group The acrylic resin having a structural unit of the unsaturated monomer (A-3) preferably accounts for 80% by weight or more, more preferably 90% by weight or more, based on the entire φ monomer of the acrylic resin. An unsaturated monomer (A-2) comprising an (meth) acrylate (A-1) represented by the formula (I), an olefinic double bond in the molecule and at least one aromatic ring, and a polar functional group The acrylic resin (A) of the copolymer obtained from the monomer mixture of the unsaturated monomer (A-3) is an average molecular weight (Mw) in terms of a weight of a standard styrene converted by a gel permeation chromatography (GPC) at 100 10,000 to 2 million in the range. When the weight average molecular weight converted to standard polystyrene is 1,000,000 or more, the subsequent property is improved under high temperature and high humidity, and the possibility of floating or peeling between the glass substrate and the adhesive layer tends to be low. Further, it is preferable because the tendency to improve the reworkability is improved. Further, when the weight average molecular weight is 2,000,000 or less, even if the size of the optical film adhered to the adhesive layer changes, since the adhesive layer changes with the change of the size, the brightness and the center of the peripheral portion of the liquid crystal cell There is no difference in brightness between the parts, so there is a tendency to suppress whitening or uneven color. The molecular weight distribution expressed by the ratio of the weight average molecular weight (Mw) to the number average molecular weight (?η) (Mw/Mn) is in the range of 3 to 7. -17- 201020306 Further, the above acrylic resin (A) exhibits adhesiveness, and the glass transition temperature thereof is preferably in the range of -10...60 °C. The glass transition temperature of the resin can usually be measured by a differential scanning calorimeter. The acrylic resin (A) constituting the adhesive layer can be produced by various methods such as solution polymerization, emulsion polymerization, bulk polymerization, suspension polymerization, and the like. In the production of the acrylic resin, a polymerization initiator is usually used. The polymerization initiator is used in an amount of about 0.001 to 5 parts by weight based on 1 part by weight of the total of all the monomers used in the production of the acrylic resin. _ As for the polymerization initiator, a thermal polymerization initiator or a photopolymerization initiator is used. As the photopolymerization initiator, for example, 4-(2-hydroxyethoxy)phenyl (2-hydroxy-2-propyl) ketone or the like can be exemplified. The thermal polymerization initiator can be exemplified by, for example, 2,2'-azobisisobutyronitrile, 2,2'-azobis(2-methylbutyronitrile), 1,1'-azobis (cyclohexyl) Alkan-1--1-carbonitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), 2,2'-azobis(2,4-dimethyl-4-methoxy An azo compound of valeronitrile), dimethyl-2,2'-azobis(2-methylpropionate), 2,2'-azobis(2-hydroxymethylpropionitrile); Lauryl peroxide, tert-butyl peroxide, benzoyl peroxide, tert-butylperoxybenzoate, cumyl hydroperoxide, diisopropylperoxydicarbonate, Dipropylperoxydicarbonate, tert-butylperoxy neodecanoate, tert-butylperoxyacetate, (3,5,5-trimethylhexyl) peroxide Organic peroxides; such as potassium persulfate, ammonium persulfate, inorganic peroxides of hydrogen peroxide, and the like. Further, a redox initiator such as a peroxide and a reducing agent may be used in combination as a polymerization initiator. The method for producing an acrylic resin is preferably a solution polymerization method among the above-exemplified methods -18 to 201020306. For example, when the solution polymerization method is used, the desired monomer may be mixed with an organic solvent, and a thermal polymerization initiator may be added under a nitrogen atmosphere, and stirred at about 40 to 90 ° C, preferably at about 60 to 80 ° C. 3~10 hours or so. Further, in order to control the reaction, the monomer or the thermal polymerization initiator may be continuously or intermittently added during the polymerization, or may be added in a state of being dissolved in an organic solvent. Here, as the organic solvent, for example, an aromatic hydrocarbon such as toluene or xylene; an ester such as ethyl acetate or butyl acetate; an aliphatic alcohol such as propanol or isopropanol; such as acetone or methyl group; Ethyl ketone, ketone of methyl isobutyl ketone, etc. [Ionic compound (B)] In the present invention, in addition to the above acrylic resin (A), an ionic compound having a melting point of 80 ° C or less is also used (B) ). The ionic compound (B) has an organic cation. The cation component constituting the ionic compound (B) is not particularly limited as long as it is an organic cation which satisfies the ionic compound having a melting point of 80 ° C or lower. For example, for example, an imidazole cation, a pyridyl cation, an ammonium cation, a phosphonium cation, a phosphonium cation, etc., but when used in an adhesive layer of an optical film, in terms of peeling off a release film provided thereon, it is difficult to charge. It is preferred to use a pyridine gun cation or an imidazole gun cation. The molecular weight of the ionic compound (B) is not particularly limited, and it is more preferably 500 or less, and more preferably 500 or less. On the other hand, in the ionic compound (B), the anion component which is a relative ion of the cation-19-201020306 component is an inorganic cation which is not particularly limited as long as it is an ionic compound having a melting point of 8 or less (TC). It may also be an organic anion, and may be, for example, the following. Chloride anion [cr], bromine anion [ΒΓ], iodine anion [1_], tetrachloroaluminate anion [AlCir], heptachlorodisuccinate anion [A12C17-] , tetrafluoroborate anion [bf4·], hexafluorophosphate anion [pf6·], perchlorate anion [cio4·], nitrate anion [no3_], acetate anion [CH3COO·], trifluoroacetate anion [cf3coct], methanesulfonate anion [CH3S〇3_], trifluoromethanesulfonate anion [cf3so3-], p-toluenesulfonate anion [p-ch3c6h4so3·], bis(trifluoromethanesulfonyl) quinone Anion [(CF3S〇2)2N-], ginseng (trifluoromethanesulfonyl) methoxylate anion [(CF3S〇2)3C·] hexafluoroarsenate anion [As F6-], hexafluoroantimonate anion [ SbF6·], hexafluoroantimonate anion [NbF6-], six Molybdate anion [TaF6·], 201020306 Dimethyl phosphite anion [(CH3)2POCH, (poly) hydrogen fluoride fluoride anion [F(HF)n_] (η is about 1~3) dicyanamide anion [( CN)2N_], thiocyanate anion [SCN_], perfluorobutane sulfonate anion [C4F9S〇T] bis(pentafluoroethanesulfonyl) quinone imine [(c2f5so2)2n·] perfluorobutyric acid Anion [c3f7coct] (trifluoromethanesulfonyl) (trifluoromethanecarbonyl) quinone imine [(cf3so2)(cf3co)n·], etc. Among these, an anionic component containing a fluorine atom is particularly excellent An ionic compound having an antistatic property is preferred, and a hexafluorophosphate anion or a bis(trifluoromethanesulfonyl) ruthenium anion is preferred. Specific examples of the ionic compound used in the present invention may be appropriately selected from the group consisting of The combination of the above-mentioned cation component and anion component. Specific compounds of a combination of a cation component and an anion component are listed as follows. N-hexyl pyridyl hexafluorophosphate, N-octylpyridine hexafluorophosphate, · N -butyl-4-methylpyridyl hexafluorophosphate N-octyl-4-methylpyridyl hexafluorophosphate, N-methyl-4-hexylpyridinium hexafluorophosphate, N-butyl-N-methylpyrrolidine hexafluorophosphate, 1- Ethyl-3-methylimidazolium hexafluorophosphate, -21 - 201020306 tetrabutylammonium hexafluorophosphate '1-ethyl-3-methylimidazole gunp-toluenesulfonate' tetrabutylammonium -tosylate ' 1-butyl-3-methylimidazole gun methanesulfonate ' (2-hydroxyethyl) trimethylammonium dimethyl sulfite (2-hydroxyethyl) trimethyl Ammonium bis(trifluoromethaneimine, N-methyl-4-hexylpyridinium bis(trifluoromethanesulfonate N-hexyl-4-methylpyridinium bis(trifluoromethanesulfonate 9 tetrahexylammonium bis ( Trifluoromethanesulfonyl) quinone imine 'trioctylmethylammonium bis(trifluoromethanesulfonyl) hydrazine 3 tributylmethylammonium bis(trifluoromethanesulfonyl) hydrazine 5 the ionic compound (B) It can be used alone or in combination. The ionic compound (B) is not limited to the substance. The ionic compound (B) having a melting point of 80 ° C or less is a viscous antistatic property formed of a composition containing the acrylic resin (A), and can effectively maintain the physical properties of the compound as an adhesive if the melting point is too high. Since the acrylic resin (A) is inferior, the compound (B) preferably has a stability of 8 ° C or less and further 70 ° C or less, and the compound (B) preferably has a long-term stability of the antistatic property. Above, further 35 ° C to expand the base) 醯 胺 imine amide 醯 imine amine, ylamine and the like. 'Or a combination of the above. As mentioned above, the adhesive layer impartability. The compatibility change of the ions is preferred. The melting point on ionicization is better than 201020306. Accordingly, the ionic compound (B) which is solid at room temperature (251) can maintain the antistatic property of the adhesive layer for a longer period of time than the ionic compound which is liquid at normal temperature. The ionic compound (B) is contained in an amount of 0.2 part by weight based on the total amount of the nonvolatile matter of the above acrylic resin (A) (from the total of the structural units of the above A-1, A-2 and A-3, respectively). The ratio of 8 parts by weight. When the amount of the oxime compound (B) is 0.2 parts by weight or more based on 100 parts by weight of the nonvolatile content of the acrylic resin (A), it is preferable because the antistatic property can be improved, and the amount thereof is 8 parts by weight or less. In this case, it is preferable to maintain durability. The amount of the ionic compound (B) is preferably 0.5 part by weight or more and 3 parts by weight or less based on 100 parts by weight of the nonvolatile matter of the acrylic resin (A). [Crosslinking Agent (C)] In the above acrylic resin (A) and ionic compound (B), the crosslinking agent (C) can be further formulated to form an adhesive composition. The crosslinking agent (C φ ) is a compound having at least two functional groups obtained by crosslinking a structural unit derived from an unsaturated monomer derived from a specific polar functional group contained in the acrylic resin (A), specifically An isocyanate type compound, an epoxy type compound, a metal chelate type compound, an aziridine type compound, etc. are illustrated. The isocyanate-based compound is a compound having at least two isocyanate groups (-NCO) in the molecule, and is exemplified by, for example, toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylene diisocyanate, and hydrogenated xylene diisocyanate. , diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate 'naphthalene diisocyanate, triphenylmethane tri-23- 201020306 isocyanate, and the like. Further, an adduct obtained by reacting the isocyanate compound with a polyhydric alcohol such as glycerin or trimethylolpropane, or a dimer or a trimer of the isocyanate compound may be used as a crosslinking agent in the adhesive. . Two or more kinds of isocyanate compounds may be used in combination. The epoxy compound is a compound having at least two epoxy groups in the molecule, and examples thereof include, for example, bisphenol A type epoxy resin, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, and glycerin II. Glycidyl ether, glycerol triglycidyl ether, 1,6-hexanediol diglycidyl ether, trimethylolpropane 0 triglycidyl ether, hydrazine, hydrazine diglycidyl aniline, hydrazine, hydrazine, hydrazine ', Ν'-tetraglycidyl-m-xylylenediamine, 1,3-bis(indole, fluorene-diglycidylaminomethyl)cyclohexane. Two or more epoxy compound ruthenium metal chelating agent compounds may also be used in combination, for example, on polyvalent metals such as aluminum, iron, copper, zinc, tin, titanium, nickel, ruthenium, magnesium, osmium, chromium, and ruthenium. A compound obtained by complexing ethyl acetoacetate or ethyl acetoxyacetate. The aziridine-based compound is a compound having at least two skeletons of a three-membered ring composed of one nitrogen atom and two carbon atoms, which is called an ethylideneamine in the molecule, and is exemplified by, for example, diphenylmethane-4. , 4'-bis(1-aziridine carboxamide), toluene-2,4-bis(1-aziridine carboxamide), tri-ethyl melamine, m-xylylene bis--1- (2-methylaziridine), gin-1-aziridine phosphine oxide, hexamethylene-1,6-bis(1-aziridine carboxamide), trimethylolpropane-trinitrogen Propidyl propionate, tetramethylolmethane-tri-A-aziridine propionate, and the like. Among these crosslinking agents, isocyanate-based compounds, especially xylene-24-201020306 diisocyanate, toluene diisocyanate or hexamethylene diisocyanate, or such isocyanate compounds and glycerin or trimethylolpropane A mixture obtained by reacting an alcohol or a mixture of an isocyanate compound such as a dimer or a trimer such as an isocyanate compound can be preferably used. When the polar functional group-containing unsaturated monomer (A-3) has a polar functional group selected from a free carboxyl group, a hydroxyl group, an amine group and an epoxy ring, it is preferred to use an isocyanate compound as at least a crosslinking agent (C). One. Preferred isocyanate compounds are, for example, toluene diisocyanate, an adduct obtained by reacting toluene diisocyanate with a polyol, a dimer of toluene diisocyanate, and a terpolymer of toluene diisocyanate, or hexamethylene. Diisocyanate, an adduct obtained by reacting hexamethylene diisocyanate with a polyol, a dimer of hexamethylene diisocyanate, and a terpolymer of hexamethylene diisocyanate. The crosslinking agent (C) is blended in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the acrylic resin (A). The blending amount of the crosslinking agent (C) is preferably from 0.1 to 5 parts by weight, more preferably from 0.2 to 3 parts by weight, per 100 parts by weight of the acrylic resin (A). The amount of the crosslinking agent (C) per 100 parts by weight of the acrylic resin (A) is 0.01 parts by weight or more, particularly preferably at most n parts by weight, because it tends to improve the durability of the adhesive, and is preferable. When it is 5 parts by weight or less, it is preferable that the whitening of the optical film with an adhesive in the liquid crystal display device is inconspicuous. [Other components constituting the adhesive] The adhesive composition for forming the adhesive layer of the present invention preferably contains a decane-based compound for the purpose of improving the adhesion between the adhesive layer and the glass substrate from -25 to 201020306. In particular, it is preferred to contain the decane-based compound (D) in the acrylic resin before the crosslinking agent is formulated. As the decane-based compound (D), there are exemplified vinyl vinyl methoxy decane, vinyl triethoxy decane, vinyl ginseng (2-methoxyethoxy) decane, and N-(2-aminoethyl)- 3-aminopropylmethyldimethoxydecane, N-(2-aminoethyl)-3-aminopropyltrimethoxydecane, 3-aminopropyltriethoxydecane, 3- Glycidoxypropyltrimethoxydecane, 3-condensed 0 glyceryloxypropylmethyldimethoxydecane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxydecane, 3- Chloropropylmethyldimethoxydecane, 3-chloropropyltrimethoxydecane, 3-methylpropenyloxypropyltrimethoxydecane, 3-mercaptopropyltrimethoxydecane, 3-glycidol Oxypropyltrimethoxydecane, 3-glycidoxypropyltriethoxydecane, 3-glycidoxypropyldimethoxymethylnonane, 3-glycidoxypropylethoxylate Dimethyl decane, etc. Two or more kinds of decane-based compounds (D) may also be used. The decane-based compound (D) may also be a polyoxyalkylene oligomer. When the polyoxyalkylene oligomer is displayed in the form of a polyol, for example, the following may be mentioned. The following copolymer containing mercaptopropyl group: 3-mercaptopropyltrimethoxydecane-tetramethoxydecane copolymer '3-mercaptopropyltrimethoxydecane-tetraethoxydecane copolymer' 3-Mercaptopropyltriethoxydecane-tetramethoxydecane copolymer '3-Mercaptopropyltriethoxydecane-tetraethoxydecane copolymer' The following copolymers containing mercaptomethyl groups: · -26 - 201020306 Mercaptomethyltrimethoxydecane·tetramethoxydecane copolymer 'Mercaptomethyltrimethoxydecane-tetraethoxydecane copolymer' Mercaptomethyltriethoxydecane-tetramethoxy The decane copolymer 'mercaptomethyltriethoxydecane-tetraethoxy oxime copolymer' such as the following copolymer containing methacryloxypropyl: 3-methylpropenyloxypropyltrimethyl Oxydecane-tetramethoxy sand compound copolymer, φ 3-methacryloxypropyltrimethoxydecane-tetraethoxydecane copolymer, 3-methylpropenyloxypropyltriethoxy Benzalkane-tetramethoxydecane copolymer, 3-methylpropenyloxypropyltriethoxydecane-tetraethoxydecane copolymer, 3 -Methyl propylene methoxy propyl methyl dimethoxy decane - tetramethoxy decane copolymer ' φ 3 - methacryloxypropyl propyl dimethoxy decane - tetraethoxy decane copolymer '3-Methyl propylene methoxy propyl methyl diethoxy decane-tetramethoxy decane copolymer ' 3-methyl propyl methoxy propyl methyl diethoxy sand court - four B Oxylate copolymers such as the following copolymers containing a propylene methoxypropyl group: 3-propenyloxypropyltrimethoxydecane-tetramethoxydecane copolymer-27- 201020306 3-Acrylonitrile Oxypropyltrimethoxydecane-tetraethoxydecane copolymer, 3-propenyloxypropyltriethoxydecane-tetramethoxydecane copolymer y 3-propylene methoxy propyl triethoxy 3-decyloxypropylmethyldimethoxydecane-tetramethoxydecane copolymer, 3-propenyloxypropylmethyldimethoxydecane Tetraethoxydecane copolymer, 3-propenyloxypropylmethyldiethoxydecane-tetramethoxydecane copolymer, 3-propenyloxypropylmethyldiethoxydecane-tetraethyl A decane copolymer, such as the following vinyl-containing copolymer: vinyl trimethoxy decane-tetramethoxy decane copolymer, vinyl trimethoxy decane-tetraethoxy decane copolymer 'vinyl triethoxy Vinoxane-tetramethoxydecane copolymer 'vinyl triethoxydecane-tetraethoxydecane copolymer' vinyl vinyl dimethoxy decane-tetramethoxy decane copolymer ' vinyl methyl two Methoxy decane-tetraethoxy decane copolymer 'vinyl methyl diethoxy decane-tetramethoxy decane copolymer ' vinyl methyl diethoxy decane - tetraethoxy decane copolymer ' The following amine-containing copolymers and the like: 201020306 3-Aminopropyltrimethoxydecane-tetramethoxydecane copolymer, 3-aminopropyltrimethoxydecane-tetraethoxydecane copolymer, 3 -Aminopropyltriethoxydecane-tetramethoxydecane copolymer, 3-aminopropyltriethoxydecane-tetraethoxydecane copolymer, 3-aminopropylmethyldimethoxy Cyclodecane-tetramethoxydecane copolymer '3-aminopropylmethyldimethoxydecane-tetraethoxydecane Oligomer '3-amino propyl methyl diethoxy silane-- tetramethoxy-silane-copolymer' [Phi] 3-amino propyl methyl diethoxy silane-- tetraethyl orthosilicate copolymer. These decane-based compounds (D) are in many cases liquid. The amount of the decane-based compound in the adhesive is 1 part by weight based on the non-volatile content of the acrylic resin (A) (the total amount is used when two or more types are used), and is usually used in an amount of about 0.01 to 10 parts by weight, preferably used. A ratio of 0.03 to 1 part by weight. The amount of the decane-based compound in an amount of 100 parts by weight based on the non-volatile portion of the acrylic resin is 0.01 parts by weight or more, particularly in the case of more than 3 parts by weight of the ruthenium resin, since the adhesion between the adhesive layer and the glass substrate can be improved. Preferably. Further, when the amount is 10 parts by weight or less, particularly preferably 1 part by weight or less, it is preferred because the tendency of the decane-based compound to bleed out from the adhesive layer is suppressed. The adhesive layer described above may further be formulated with a crosslinking catalyst, a weathering stability, a tackifier, a plasticizer, a softener, a dye, a pigment, an inorganic chelating agent, and a resin other than the acrylic resin (A). Wait. Further, it is also useful to prepare an ultraviolet curable compound in an adhesive, and to form an adhesive layer and then irradiate it with ultraviolet rays to harden it, thereby forming a harder adhesive layer. Wherein, if the crosslinking agent and the crosslinking catalyst are simultaneously formulated in the adhesive, the adhesive layer can be prepared by a short time of aging, and the resin film and the adhesive in the -29 - 201020306 resin film of the obtained adhesive can be suppressed. The occurrence of floating or peeling between the layers causes foaming in the adhesive layer, and the reworkability is also better. As the crosslinking catalyst, for example, such as hexamethylenediamine, ethylenediamine, polyethylenimine 'hexamethylenetetramine, diethylidenetriamine, triethylidenetetraamine, and the like can be exemplified. A sulfone diamine, a trimethylene diamine, a polyamine resin, an amine compound of a melamine resin, or the like. When the amine compound is blended as a crosslinking catalyst in the adhesive, the crosslinking agent is preferably an isocyanate compound. These components constituting the adhesive are dissolved in a solvent to form a viscous composition, which is applied onto a suitable substrate and dried to form an adhesive layer. [Gel fraction of the adhesive layer] In the present invention, as described earlier, the adhesive layer has a gel fraction of 70 to 99% by weight. The gel fraction is determined according to the following (I) to (IV). (I) affixing the above-mentioned (I) with an adhesive layer of about 8 cmx to about 8 cm in area and a metal mesh composed of SUS304 of about 10 (;111) < about 10 cm (the weight is set to wm). The weight of the obtained adhesive was set to WS, and then folded into a four-fold shape by encapsulating the adhesive layer to be weighed by a stapler, and the weight was set to Wb. (III) A glass container was placed in the mesh of the above (II) retained by the stapler, and after impregnation with 60 ml of ethyl acetate, the glass container was stored at room temperature for 3 days. -30- 201020306 (IV) Remove the mesh from the glass container, dry it at 120 t for 24 hours, weigh it and set its weight to Wa, and calculate the gel fraction according to the following formula:

Gel fraction (% by weight) = [{Wa - (Wb - Ws) - Wm} / (Ws - Wm)] xlOO The gel fraction of the adhesive was set to 70 to 99% by weight. When the gel fraction is 70% by weight or more, it is preferable to improve the durability of the adhesive, and when φ has a gel fraction of 99% by weight or less, the gelation of the adhesive is preferable because it is easy to manufacture. The rate can be adjusted by the kind of the acrylic resin (A) or the amount of the crosslinking agent of the active ingredient of the adhesive. Specifically, when the amount of the unsaturated monomer (A-3) having a polar functional group in the acrylic resin (A) is large, or the amount of the crosslinking agent (C) in the adhesive composition is large Further, since the gel fraction is high, the gel fraction can be adjusted by the amount of the unsaturated monomer having a polar functional group and/or the crosslinking agent. Therefore, regarding the unsaturated monomer (A-3) having a polar functional group, the unit amount of the unsaturated monomer (A-3) having the polar functional group in the acrylic resin (A) is 0.1 to 0.1 In the range of 5% by weight, in combination with the other components constituting the acrylic resin (A), and in combination with the type and amount of the crosslinking agent, the gel fraction may be selected and adjusted to the above range. Further, the amount of the crosslinking agent (C) is preferably a ratio of the crosslinking agent to 100 parts by weight of the non-volatile portion of the acrylic resin (A) constituting the adhesive (the total amount of the two types or more is used) It is selected from the range of 0.1 to 5 parts by weight in combination with the kind of the acrylic resin. -31 - 201020306 [Optical film with adhesive] The optical film with an adhesive of the present invention is one in which an adhesive layer formed of the above adhesive composition is provided on at least one side of the optical film. The optical film used herein is a film having optical characteristics, and examples thereof include, for example, a polarizing plate, a retardation film, and the like. The so-called polarizing plate is an optical film having a function of emitting polarization for incident light such as natural light. The polarizing plate has a linear polarizing plate having a property of absorbing a linear polarized light having a vibrating surface in a certain direction and transmitting a linear polarized light having a vibrating surface perpendicular thereto; and having a linear polarized reflection of a vibrating surface having a certain direction, Further, a polarized light separation film having a property of transmitting a linearly polarized light having a vibration plane perpendicular thereto, and an elliptical polarizing plate obtained by laminating a polarizing plate and a retardation film to be described later. The most preferable examples of the polarizing plate, especially the linear polarizing film (also referred to as a polarizing photon, a polarizing film), are exemplified by adsorbing iodine or a dichroic dye on a uniaxially stretched polyvinyl alcohol resin film. Chromatic pigments and aligners.相位 The retardation film is an optical film exhibiting optical anisotropy, and is exemplified by, for example, polyvinyl alcohol, polycarbonate, polyester, polyarylate, polyimide, polyolefin, cyclic polyolefin, Polystyrene, poly-milling, polyether oxime, polyvinylidene fluoride/polymethyl methacrylate, liquid crystal polyester, acetyl cellulose, ethylene-vinyl acetate copolymer saponified product, polyvinyl chloride, etc. The polymer film is stretched to a stretching film obtained by about several times. Among them, a polymer film in which a polycarbonate film or a cyclic polyolefin film is uniaxially stretched or biaxially stretched is preferred. The uniaxial retardation film is also known as -32-201020306, which can be used as a wide viewing angle retardation film or a low photoelasticity retardation film, and can also be used by coating or aligning liquid crystal compounds. A film exhibiting optical anisotropy or a film exhibiting optical anisotropy by coating with an inorganic layered compound is used as a retardation film. These retardation films are known as temperature-compensated retardation films, and have a thin φ film which is sold by Nippon Oil Co., Ltd. under the trade name "LC Film", which is a rod-shaped liquid crystal spiral alignment. A film that is sold under the trade name "NH Film" by Nippon Oil Co., Ltd., which is a tilt-aligned film of a rod-shaped liquid crystal, which is sold by Fuji Film Co., Ltd. under the trade name "WV Film". A fully biaxially oriented film sold by Sumitomo Chemical Co., Ltd. under the trade name "VAC Film", the same biaxially oriented type sold by Sumitomo Chemical Co., Ltd. under the trade name "new VAC Film". Film and the like. Further, an optical film may be used by adhering a protective film to the optical films. As the protective film, a transparent resin film is used, and as the transparent resin, for example, an ethyl ketone cellulose resin typified by triethyl fluorenyl cellulose or diethyl fluorenyl cellulose is used, and polymethyl methacrylate is used. Representative methacrylic resin, polyester resin, polyolefin resin, polycarbonate resin, polyether ether ketone resin, polyfluorene resin, and the like. The resin constituting the protective film may be formulated with a UV absorption such as a salicylate-based compound, a benzophenone-based compound, a benzotriazole-based compound, a triazine-based compound, a cyanoacrylate-based compound, or a nickel-salted salt-based compound. Agent. As the protective film, an ethylene glycol-based resin film such as a triethylenesulfonated cellulose film is preferably used. In the optical film described above, the linear polarizing plate is often used in a state in which a protective film is adhered to one surface or both surfaces of a polarizing film composed of a polyvinyl alcohol resin. Further, the elliptically polarizing plate is formed by laminating a linear polarizing plate and a retardation film, and the polarizing plate is often in a state in which a protective film is adhered to one surface or both surfaces of the polarizing film. When the adhesive layer of the present invention is formed on the elliptically polarizing plates, an adhesive layer is usually formed on the side of the retardation film. Preferably, the optical film with an adhesive adheres to the surface of the adhesive layer to protect the surface of the adhesive layer before use. The optical film provided with the adhesive of the release film can be produced by, for example, coating the above-mentioned adhesive composition on a release film and forming an adhesive layer, and then laminating the optical film on the obtained adhesive layer. The method comprises the steps of: applying an adhesive composition on an optical film and forming an adhesive layer, and adhering a release film on the adhesive surface to protect the optical film with an adhesive layer. The release film used herein may be a film made of various resins such as polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyarylate, or the like, and A mold release treatment such as an anthrone treatment is applied to the surface where the substrate and the adhesive layer are joined. The thickness of the adhesive layer is not particularly limited, and is usually preferably 30 # m or less, more preferably 10 " m or more, more preferably 15 to 25 / z m. When the thickness of the adhesive layer is 30/m or less, the adhesion under high temperature and high humidity is improved, and the possibility of occurrence of floating or peeling between the glass substrate and the adhesive layer is lowered, and there is a tendency The regrindability tends to be improved, and when the thickness is 10/ztn or more, even if the size of the -34-201020306 of the optical film pasted thereon changes, the adhesive layer fluctuates with the change in its size. Therefore, there is no difference between the brightness of the peripheral portion of the liquid crystal cell and the brightness of the central portion, and it is preferable to suppress the tendency of whitening or color unevenness. The thickness of the adhesive layer which is conventionally adhered to the liquid crystal cell glass has been 25, but in the present invention, even if the thickness is 20 // m or less, the performance as an adhesive layer can be sufficiently exhibited. When the optical film with the adhesive layer of the present invention is adhered to the glass substrate to form an optical laminate, the optical film is peeled off from the glass substrate due to mismatch, since the adhesive layer is accompanied by peeling of the optical film, and the adhesive The surface of the peeling substrate which is in contact with the layer hardly causes blurring or paste-like residue, so that the peeled glass substrate can be directly and easily adhered directly to the optical film with the adhesive. In other words, the so-called reworkability is excellent. [Optical Laminate] The optical film with an adhesive of the present invention can be laminated on a Φ glass substrate with an adhesive layer to form an optical laminate. An optical laminate obtained by laminating an optical film with an adhesive on a glass substrate, for example, an optical film peeling release film obtained by adhering the above-mentioned adhesive, and adhering the exposed adhesive layer to the surface of the glass substrate can. Here, the glass substrate can be, for example, a glass substrate of a liquid crystal cell, an antiglare glass, or a glass for sunglasses. Wherein, an optical film (upper polarizing plate) with an adhesive is laminated on the glass substrate on the front side (identification side) of the liquid crystal cell, and another optical film with an adhesive is laminated on the glass substrate on the back side of the liquid crystal cell ( The optical laminate formed of the lower polarizing plate is preferable because it can be used as a panel of a liquid crystal display device (liquid-35-201020306 crystal panel). The material of the glass substrate is exemplified by, for example, soda glass, low bismuth glass, bismuth-free glass, or the like. Regarding the optical laminate of the present invention, an example of a relatively suitable layer configuration is shown in a sectional view in Fig. 1. In the example shown in Fig. 1 (A), the protective film 3 having the surface treated layer 2 is adhered to one surface of the linear polarizing film 1 on the side opposite to the surface treated layer 2 to constitute a polarizing plate 5. In this example, the polarizing plate 5 can also be the optical film 10 of the present invention at the same time. The adhesive layer 20 containing the ionic @ compound described above is provided on the surface of the linear polarizing film 1 opposite to the protective film 3 to constitute an optical film 25 with an adhesive. Next, the surface of the adhesive layer 20 on the opposite side to the polarizing plate 5 is adhered to the liquid crystal cells 30 of the glass substrate to constitute the optical laminate 40. An example shown in FIG. 1(B) is that the first protective film 3 having the surface treatment layer 2 is adhered to one side of the linear polarizing film 1 on the side opposite to the surface treatment layer 2, and is linearly polarized. The second protective film 4 is adhered to the other surface of the film 1 to constitute the polarizing plate 5. In this example, the polarizing plate 5 also serves as the optical film 10 of the present invention. On the other side of the second protective film 4 constituting the polarizing plate 5, an adhesive layer 20 containing an ionic compound as described above is provided to constitute an optical film 25 with an adhesive. Then, the surface of the adhesive layer 20 opposite to the polarizing plate 5 is adhered to the liquid crystal cells 30 of the glass substrate to form the optical laminate 40. In the example shown in Fig. 1 (C), the protective film 3 having the surface treated layer 2 is adhered to one surface of the linear polarizing film 1 on the side opposite to the surface treated layer 2 to constitute a polarizing plate 5. The surface of the linear polarizing film 1 on the opposite side of the protective film 3 is adhered to the retardation film 7' by the interlayer adhesive 8 to constitute a film 10. The adhesive layer 20 containing an ionic compound described above is provided on the outer side of the retardation film 7 constituting the optical film 10 to constitute an optical film 25 with an adhesive. Then, the surface of the adhesive layer 20 opposite to the polarizing plate 10 is adhered to the liquid crystal cell 30 of the glass substrate to form the optical laminate 40. Further, as shown in FIG. 1(D), the surface will have a surface. The first protective film 3 of the treatment layer 2 is adhered to one surface of the linear φ polarizing film 1 on the side opposite to the surface treatment layer 2, and the second protective film 4 is adhered to the other surface of the linear polarizing film 1 to form a polarizing film. Board 5. The outer side of the second protective film 4 constituting the polarizing plate 5 is adhered to the retardation film 7 through the interlayer adhesive 8, and constitutes the optical film 10. The adhesive layer 20 containing an ionic compound described above is provided on the outer side of the retardation film 7 constituting the optical film 1 to constitute an optical film 25 with an adhesive. Next, the surface of the adhesive layer 20 on the opposite side to the optical film 10 is adhered to the liquid crystal cell 30 of the glass substrate to constitute the optical laminate 40. In the above examples, the first protective film 3 and the second protective film 4 are usually made of a triethylenesulfonated cellulose film, but they may be formed of various transparent resin films as described above. Further, the surface treatment layer formed on the surface of the first protective film 3 may be a hard coat layer, an antiglare layer, an antireflection layer, an antistatic layer or the like. A plurality of layers such as these may also be provided. As shown in FIGS. 1(C) and (D), when the retardation film 7 is laminated on the polarizing plate 5, if it is a small-sized liquid crystal display device, a preferred example of the retardation film 7 is W4 wavelength. board. In this case, the absorption axis of the polarizing plate 5 and the retardation axis of the retardation film 7 of the quarter-wavelength plate are generally arranged at about 45 degrees -37 to 201020306, but depending on the characteristics of the liquid crystal cell 30, the angle is also It can be offset to some extent from 45 degrees. On the other hand, in the case of a large-sized liquid crystal display device such as a television, for the purpose of phase difference compensation or viewing angle compensation of the liquid crystal cells 30, a phase difference film having various phase differences 符 in accordance with the characteristics of the liquid crystal cell 30 is used. In this case, the absorption axis of the polarizing plate 5 and the slow phase axis of the retardation film 7 are usually arranged in a substantially vertical or substantially parallel relationship. When the retardation film 7 is formed of a quarter-wave plate, a uniaxial or biaxially stretched film is preferably used. Further, when the retardation film 7 is provided with the phase difference compensation or the viewing angle compensation of the liquid crystal cell 30, in addition to the uniaxial or biaxially stretched film, it is also possible to use thickness in addition to the uniaxial or biaxial stretching. As the retardation film 7, a film which is oriented in the direction of alignment, a film which exhibits a phase difference, such as a liquid crystal, and a film which is fixed by alignment, or the like, which is an optical compensation film, is applied to the support film. Similarly, as shown in Figs. 1 (C) and (D), when the interlayer adhesive 8 is adhered to the polarizing plate 5 and the retardation film 7, the interlayer adhesive 8 can be formulated with an ionic compound as described above. An electrostatic agent imparts an antistatic property to an adhesive, but generally, since an antistatic property is not desired in this portion, G generally uses an acrylic adhesive which does not contain an antistatic agent. Further, as in the large-sized liquid crystal display device described above, when the absorption axis of the polarizing plate 5 is substantially perpendicular or substantially parallel to the slow axis of the retardation film 7, the polarizing plate 5 and the retardation film 7 can be passed through the roller. In the case where the roll is adhered to a position where no peeling property is required between them, an adhesive which can be strongly bonded once adhered and which does not peel off can be used instead of the interlayer adhesive 8 shown in Figs. 1(C) and (D). The above-mentioned adhesives can be exemplified by, for example, an aqueous solution or an aqueous dispersion which constitutes an ultraviolet curing type which exhibits an adhesive force by ultraviolet ray 38 - 201020306 by the irradiation of ultraviolet light 38 - 201020306 by an aqueous adhesive which exhibits an adhesive force by evaporation of water as a solvent. Followers and so on. Further, the adhesive layer 20 containing the ionic compound formed on the retardation film 7 shown in Figs. 1(c) and (D) can also be circulated by itself, and becomes the optical of the adhesive of the present invention. film. An optical film having an adhesive layer formed by forming an adhesive layer containing an ionic compound on a retardation film can be used as an optical laminate for adhering the adhesive layer to a liquid crystal cell of a glass substrate, and the phase difference can also be obtained. The film side is pasted with a polarizing plate, and is an optical film with an adhesive. Fig. 1 is a view showing an example in which an optical film 25 with an adhesive is disposed on the side of the liquid crystal cell 30. However, the optical film with an adhesive of the present invention may be disposed on the back side of the liquid crystal cell, that is, on the side of the backlight. When the optical film with an adhesive of the present invention is disposed on the back side of the liquid crystal cell, the protective film 3 having the surface treatment layer 2 shown in FIG. 1 may be replaced with a protective film having no surface treatment layer, and the other may be as shown in FIG. (A) to (D). In this case, a film for improving the brightness 、, a light concentrating film, a diffusion film, or the like may be provided on the outer side of the protective film constituting the polarizing plate, and various optical films which are known to be disposed on the back side of the liquid crystal cell may be provided. . As described above, the optical laminate of the present invention can be preferably used in a liquid crystal display device. The liquid crystal display device formed of the optical laminate of the present invention can be used for, for example, a liquid crystal display for a personal computer including a notebook type, a desktop type, a PDA (personal digital assistant), a television, a vehicle display, an electronic dictionary, a digital camera, Digital camera, electronic desktop computer, time I temple. -39-201020306 EXAMPLES Hereinafter, the present invention will be more specifically illustrated by the examples, but the present invention is not limited thereto. In the example, the "parts" and "%" indicating the amount of use and the content are based on weight unless otherwise specified. In the following examples, the nonvolatile matter is determined according to the method of JIS K 5 407. Specifically, the adhesive solution was taken on a shallow tray at an arbitrary weight, and the ratio of the residual non-volatile weight after drying at 115 ° C for 2 hours in an explosion-proof oven was compared with the ratio of the initially measured solution weight. Further, the measurement of the weight average molecular weight is carried out in a GPC apparatus, and four "TSK gel XL" manufactured by TOSOH Co., Ltd. and "GPC KF-802" manufactured by Shodex (stock) are connected in series as a column. Tetrahydrofuran was used as the elution solution, and the sample concentration was 5 mg/ml, the sample introduction amount was 100 μl, the temperature was 40 ° C, and the flow rate was 1 ml/min, which was carried out by standard polystyrene conversion. First, the acrylic component (A) specified in the present invention, which is a main component of the adhesive composition, and the like, are examples of the production of an acrylic resin other than the one specified in the present invention. [Polymer Example 1] 81.8 parts of ethyl acetate, 93.6 parts of butyl acrylate (A-1), and 5.0 parts of (A-2) were fed into a reaction vessel equipped with a cooling tube, a nitrogen gas introduction tube, a thermometer, and a stirrer. a mixture of 2-phenoxyethyl acrylate, 1 〇 as a mixture of 2-hydroxyethyl acrylate (A-3) and 0.4 parts of acrylic acid, and the air in the apparatus is replaced with nitrogen to become oxygen-free. While raising the internal temperature to 55 °C. Subsequently, a solution obtained by dissolving 〇· Μ azoisobutyronitrile (201020306 polymerization initiator) in 10 parts of ethyl acetate was added in its entirety. After the addition of the polymerization initiator for 1 hour, the monomer was removed so that the concentration of the acrylic resin was 35%, and ethyl acetate was continuously added to the reaction vessel at an addition rate of 17.3 parts/hr, while the internal temperature was 54 to 5. The mixture was kept at 6 ° C for 12 hours, and finally ethyl acetate was added to adjust the concentration of the acrylic resin to 20%. The weight average molecular weight Mw of the obtained acrylic resin converted into polystyrene by GPC was 1,7,1,0,000, and Mw/Mn was 4.3. This is called acrylic resin A. The structural unit of 2-hydroxyethyl acrylate derived from a hydroxyl group-containing unsaturated monomer in acrylic acid φ resin A was 1%, and the structural unit derived from acrylic acid which is a carboxyl group-containing unsaturated monomer was 0.4%. [Polymerization Example 2] In the monomer composition, except that the amount of butyl acrylate was changed to 90.6 parts, and the amount of 2-phenoxyethyl acrylate was changed to 8_0 parts, the remainder of the polymerization example 1 was obtained. Ester solution. The obtained acrylic resin had a weight average molecular weight Mw of 1,740,000 and a M w/Mn of 4.1 in terms of GPC φ. This is called acrylic resin B. The 2-hydroxyethyl acrylate derived from the hydroxyl group-containing unsaturated monomer in the acrylic resin B has a structural unit of 1% and is derived from a structural unit of acrylic acid which is a carboxyl group-containing unsaturated monomer of 0.4%. [Polymerization Example 3] In the monomer composition, except that the amount of butyl acrylate was changed to 88.6 parts, and the amount of 2-phenoxyethyl acrylate was changed to 10.0 parts, the remainder was as in Polymerization Example 1, -41 · 201020306 to obtain acrylic acid. Ethyl acetate solution of the resin. The weight average molecular weight Mw of the obtained acrylic resin converted into polystyrene by GPC is 1,560,000.

Mw/Mn is 4.5. This is called acrylic resin C. The 2-hydroxyethyl acrylate derived from the hydroxyl group-containing unsaturated monomer in the acrylic resin C has a structural unit of 1% and is derived from a structural unit of acrylic acid which is a carboxyl group-containing unsaturated monomer of 0.4%. [Polymerization Example 4: Comparative] _ In the monomer composition, except that the amount of butyl acrylate was changed to 78.6 parts, and the amount of 2-phenoxyethyl acrylate was changed to 20.0 parts, the polymerization was obtained as in Polymerization Example 1. Ethyl acetate solution of the resin. The weight average molecular weight Mw of the obtained acrylic resin converted into polystyrene by GPC is 1,370,00 Å,

Mw/Mn was 4.4. This is called acrylic resin D. The structural unit of 2-hydroxyethyl acrylate derived from a hydroxyl group-containing unsaturated monomer in the acrylic resin D was 1%, and the structural unit derived from acrylic acid which is a carboxyl group-containing unsaturated monomer was 〇. 4%. U

[Polymerization Example 5: Comparative] In the monomer composition, the amount of the butyl acrylate was changed to 58.6 parts, and the amount of the 2-phenoxyethyl acrylate was changed to 4 〇.0 parts, and the remainder was as in the polymerization example 1. An ethyl acetate solution of an acrylic resin was obtained. The weight average molecular weight Mw of the obtained acrylic resin converted into polystyrene by GPC is 1,270,000.

Mw/Mn was 4.4. This is called acrylic resin E. The structure of 2-hydroxyethyl acrylate derived from a hydroxyl group-containing unsaturated monomer in the acrylic resin E is mono-42-201020306, which is 1%, and is derived from the structural unit of acrylic acid which is a carboxyl group-containing unsaturated monomer. 0.4%. [Polymerization Example 6: Comparative] In the monomer composition, except that the amount of butyl acrylate was changed to 38.6 parts, and the amount of 2-phenoxyethyl acrylate was changed to 60. 0 parts, the remainder was obtained as in Polymerization Example 1. Acrylic resin in ethyl acetate solution. The obtained acrylic resin had a weight average molecular weight Mw of 1,270,000 and Mw/Mn of 5.0 in terms of GPC φ. This is called acrylic resin F. The 2-hydroxyethyl acrylate derived from the hydroxyl group-containing unsaturated monomer in the acrylic resin F has a structural unit of 1% and is derived from a structural unit of acrylic acid which is a carboxyl group-containing unsaturated monomer of 0.4%. [Polymerization Example 7: Comparative] In the monomer composition, except that the amount of butyl acrylate was 98.6 parts, and 2-phenoxyethyl acrylate was not used, the acrylic resin was obtained as in Polymerization Example 1. Ethyl acetate solution. The weight average molecular weight Mw of the obtained acrylic resin converted into polystyrene by GPC was 1,47 Å, 〇〇〇, and Mw/Mn was 4.4. This is referred to as acrylic resin G. The structural unit of 2-hydroxyethyl acrylate derived from a hydroxyl group-containing unsaturated monomer in the acrylic resin G was 1%, and the structural unit derived from acrylic acid which is a carboxyl group-containing unsaturated monomer was 0.4%. [Polymerization Example 8] -43-201020306 In the monomer composition, the amount of butyl acrylate was changed to 88.4 parts, the amount of 2-phenoxyethyl acrylate was changed to 10.0 parts, and the amount of acrylic acid was changed to 0.6 parts. As in Polymerization Example 1, an ethyl acetate solution of an acrylic resin was obtained. The weight average molecular weight Mw of the obtained acrylic resin converted into polystyrene by GPC was 1,530,000, and Mw/Mn was 4.8. This is called acrylic resin Η. The structural unit of 2-hydroxyethyl acrylate derived from a hydroxyl group-containing unsaturated monomer in the acrylic resin crucible was 1%, and the structural unit derived from acrylic acid which is an unsaturated monomer having a carboxyl group was 0.6%.聚合 [Polymerization Example 9] The monomer composition was changed to 78.4 parts of butyl acrylate (Α-1) and 1 part by weight of 2-methoxyethyl acrylate, and 10.0 parts of (Α-2). An ethyl acetate solution of an acrylic resin was obtained as in Polymerization Example 1, 2-phenoxyethyl acrylate, 1.0 part of 2-hydroxyethyl acrylate (0.6%), and 0.6 part of acrylic acid. . The weight average molecular weight Mw of the obtained acrylic resin converted into polystyrene by GPC was 1,540,000, and Mw/Mn was ·4.99. This is called acrylic resin I. The structural unit of 2-hydroxyethyl acrylate derived from a hydroxyl group-containing unsaturated monomer in the acrylic resin I is 1%, and the structural unit derived from acrylic acid which is a carboxyl group-containing unsaturated monomer is 0.6%. 1 0 : For comparison] In the same reaction vessel as used in Polymerization Example 1, 81.8 parts of ethyl acetate, 90.6 parts of butyl acrylate (A-1), and 8.0 parts were used as -44-201020306 (A- 2) 2-phenoxyethyl acrylate, κο parts as a mixed solution of (A_3) 2-hydroxyethyl acrylate and 0.4 parts of acrylic acid, and the air in the apparatus is replaced with nitrogen to become oxygen-free. The temperature rises to 55 °C. Subsequently, a solution of 〇·14 parts of azoisobutyronitrile (polymerization initiator) dissolved in 10 parts of ethyl acetate was added in a total amount. After adding the polymerization initiator for 1 hour, the monomer was removed so that the concentration of the acrylic resin was 35%, and ethyl acetate was continuously added to the reaction vessel at an addition rate of 17.3 parts/hr, while φ was at an internal temperature of 54 to 56 t. Hold for 4 hours. Subsequently, a solution obtained by dissolving 0.2 part of azoisobutyronitrile (polymerization initiator) in 10 parts of ethyl acetate was added in the whole amount, and kept at the same temperature for 8 hours. Finally, ethyl acetate was added to adjust the concentration of the acrylic resin to 20%. The weight average molecular weight Mw of the obtained acrylic resin converted into polystyrene by GPC was 1,070,000, and Mw/Mn was 8.2. This is called acrylic resin J. The structural unit of 2-hydroxyethyl acrylate derived from a hydroxyl group-containing unsaturated monomer in the acrylic resin J is 1%' and the structural unit derived from acrylic acid which is a carboxyl group-containing unsaturated monomer is 0.4%. An overview of the monomer composition, weight average molecular weight, and Mw/Mn of Polymerization Examples 1 to 1 is shown. In the table, BA means butyl acrylate 'MEA means 2-methoxyethyl acrylate' PEA means 2-phenoxyethyl acrylate 'HEA means 2-hydroxyethyl acrylate, and AA means acrylic acid. -45- 201020306 [Table l]

Polymerization monomer composition (parts) Molecular weight (Mw) Mw/Mn Acrylic resin BA MEA PEA HEA AA 1 93.6 0 5 1 0.4 Π1 million 4.3 A 2 90.6 0 8 1 0.4174 million 4.1 B 3 88.6 0 10 1 0.4 1.56 million 4.5 C 4 78.6 0 20 1 0.4 1.37 million 4.4 D 5 58.6 0 40 1 0.4 1.27 million 4.4 E 6 38.6 0 60 1 0.4 127 million 5.0 F 7 98.6 0 0 1 0.4147 million 4.4 G 8 88.4 0 10 1 0.6 1.53 million 4.8 Η 9 78.4 10 10 1 0.6 1.54 million 4.9 I 10 90.6 0 8 1 0.41 million 8.2 J Next, the adhesive was prepared using the acrylic resin produced above, and the examples and comparative examples applied to the optical film were shown. In the following examples and comparative examples, the following examples were used as the ionic compound. Ionic compound 1 : N-octyl-4-methylpyridine hexafluorophosphate (having the structure of the following formula, melting point 44. 〇) 0 [Chemical 3] CH3-0N-(CH2)7ch3 pf6- ion implantation化口2. N_Hexyl_4_Methyl sulphate sulphate (three gas methane sulfonyl) quinone imine (having the structure of the following formula, melting point 18. 匸) -46- 201020306 [Chemical 4]

(CF3S〇2)2N CH3-^N-(CH2)5CH3 Ionic compound 3: trioctylmethylammonium bis(trifluoromethanesulfonyl) quinone (having the structure of the following formula, liquid at normal temperature) [Chemical 5]

(CH2)7CH3 1 +

CH3-N-(CH2)7CH3 (CF3S02)2N (CH2)7CH3 ionic compound 4: tributylmethylammonium bis(trifluoromethanesulfonyl) quinone imine (having the structure of the following formula, melting point 28 ° C) [ (6) (〇η2)3〇η3 1+ -ch3-n-(CH2)3CH3 (Cf3so2)2n (CH2)3CH3 Further, the crosslinking agent and the decane-based compound are each shown below (all are trade names). . (crosslinking agent) CORONET L: Ethyl acetate solution of trimethylbenzene propane adduct of toluene diisocyanate (solid concentration: 75%), purchased from Japanese polyurethane (-47- 201020306 body fluid alkyl decyl oxymethyl triyl) Propyl. Oxygen} Oil stock Gan C water industry} Shrinkage: Xuehe 03 chemicalized -4 BM-alkane K self-purchasing [Examples 1-8 and Comparative Examples 1~6] (a) Adhesive Manufactured _ Each of the solid components of the acrylic resins A to J obtained in the polymerization examples 1 to 1 was mixed in an amount of 1 part by weight, and the ionic compound of 5%. KBM-403) and the individual amount of crosslinker (CORONET L) shown in Table 2, followed by the addition of ethyl acetate to a solid concentration of 13% to form an adhesive composition. The crosslinker (CORONET L) is The above-mentioned ethyl acetate solution having a solid concentration of 75%, but the addition amount shown in Table 2 is the solid content. ❹ (b) Preparation of an optical film with an adhesive using an applicator to make the thickness after drying In the form of 20, each of the above adhesive compositions is applied to a release-treated polyethylene terephthalate film ( The product name "PET 3811", purchased from LINTEC (stock), called the separator), was dried at 90 ° C for 1 minute to obtain a sheet-like adhesive. Next, the iodine was adsorbed and aligned. The two sides of the vinyl alcohol polarizer are laminated on the single side of the polarizing plate of the three-layer structure formed by the protective film composed of triethyl fluorenyl cellulose, and the above-mentioned sheet-like adhesive is laminated to be separated from -48-201020306 After the opposite side of the board (adhesive surface), it was aged for 7 days at a temperature of 231 and a relative humidity of 65% to obtain a polarizing plate with an adhesive. (c) Evaluation of antistatic property of an optical film with an adhesive The separator of the obtained polarizing plate with an adhesive was peeled off, and the surface impedance 値 of the adhesive was measured by a surface inherent impedance measuring apparatus [Hirest-up MCP-HT450 (trade name) manufactured by Mitsubishi Chemical Corporation). Anti-Φ static. If the surface impedance 値 is 1 〇11 Ω /□ grade or less, good antistatic properties can be obtained. (d) Fabrication and evaluation of optical laminates from the adhesive prepared in (b) above After the polarizing plate peels off the separator, the adhesive surface becomes A cross-nicole was applied to both sides of a liquid crystal cell glass substrate [1737" (trade name) manufactured by Corning Incorporated to produce an optical laminate. The optical laminate was Φ at a temperature of 80 °C. The test was carried out for 96 hours under dry conditions for heat resistance test. Then, the state of whitening when light was incident from the side of the polarizing plate on one side was visually observed. The results were classified according to the following criteria and shown in Table 2 "whitening (80 ° C drying). In the column of "), the state of whiteness appears. 1. There is no whitening at all. 2. Almost no whiteness is seen. 3. A little white is seen. -49- 201020306 4. Significantly confirm that white is off, respectively, at temperature. The heat-resistance test (referred to as "heat-resistant J" in Table 2" was carried out for 300 hours under dry conditions of 8 〇r, and the heat-resistant test was carried out at a temperature of 60 ° C and a relative humidity of 90% for 300 hours. In the case of 2, referred to as "moisture-resistant heat", and from the heating state of 70 °C, the temperature is lowered to -3 0T: and then the temperature is raised to 7 Torr. (: This was used as a one-cycle (1 hour)'. The thermal-resistance test (referred to as "HS-resistant" in Table 2) was repeated for 1 cycle, and the optical laminate after the test was visually observed. The G-column classifications are all listed in Table 2. <Evaluation of heat, damp heat, and thermal shock (in Table 2, "heat resistance", "humidity resistance", and "HS resistance"). 1. There is no change in appearance such as lifting, peeling, foaming, etc. 2. There is almost no change in appearance such as lifting, peeling, foaming, etc. 3. The appearance changes such as lifting, peeling, and foaming are slightly observed. Significant change in appearance such as lifting, peeling, foaming, etc. © (e) Reworkability evaluation of optical film with adhesive The reworkability evaluation was carried out as follows. First, the above (b) was obtained. The polarizer with the adhesive was cut into a test piece of 25 mm x 150 mm size. Then, the test piece was attached to the adhesive side with the adhesive device [LAMPAKER" (trade name) manufactured by FUJIPLA Co., Ltd. On a glass substrate for liquid crystal cells, at 50 ° C, 5 kg / cm2 ( 490_3kPa) was subjected to high-pressure heat treatment for 20 minutes, followed by heat treatment at 70 °C for 2 hours '-50- 201020306 and then stored in an oven at 50 °C for 48 hours, at a temperature of 23 ° C and a relative humidity of 50%. The polarizing plate was peeled from the adhesive test piece at a speed of 300 mm/min in a 180° direction, and the surface state of the glass plate was observed by the following criteria. The results are shown in Table 2. <Evaluation criteria for reworkability> 1. It is confirmed that there is no blur at all on the surface of the glass plate. φ 2. There is almost no blur on the surface of the glass plate. 3. The surface of the glass plate is confirmed to be blurred, etc. 4. It is confirmed that the adhesive remains on the surface of the glass plate.

[Table 2] Acrylic resin ion 1 Biochemical compound Crosslinking amount (parts) Gel fraction (%) Surface resistance (Ω/ □) Whitening (80 °C drying) Durability and reworkability _ ΡΕΑ _ Adding amount (parts) Heat and humidity resistance to heat resistance Example 1 A 5 1 0.8 0.5 82 2.7 Ε + 00 2 1 2 1 1 Example 2 B 8 1 0.8 0.5 81 2.7 Ε + 00 1 1 2 1 1 Example 3 C 10 1 0.8 0.4 76 3.5Ε+00 1 1 2 2 1 Example 4 Η 10 1 3.0 0.5 76 3.6Ε+00 1 2 1 2 1 Example 5 Η 10 2 3.0 0.5 73 2.9Ε+00 1 1 1 2 1 Example 6 Η 10 3 3.0 0.5 76 9.8 Ε + 00 1 2 1 2 2 Example 7 Η 10 4 3.0 0.5 77 7.4 Ε + 00 1 1 1 2 2 Example 8 I 10 1 2.0 0.4 82 4.7 Ε + 00 1 2 2 1 2 Comparative Example 1 D 20 1 0.8 0.4 80 3.2Ε+00 4 3 2 2 1 Comparative Example 2 Ε 40 1 0.8 0.4 73 4.1Ε+00 4 2 2 2 1 Comparative Example 3 F 60 1 0.8 0.4 70 4.6Ε+00 4 3 2 3 1 Comparative Example 4 G 0 1 0.8 0.5 84 1.2Ε+00 3 2 2 1 1 Comparative Example 5 C 10 1 0.8 0.1 43 2.6Ε+00 3 4 4 3 2 Comparative Example 6 J 8 1 3.0 0.5 74 3.7Ε+00 3 1 2 2 2 -51 - 201020306 It can be understood from Table 1 and Table 2 that the acrylic resin is formulated in the present invention. Examples 1 to 8 in which the quantitative ionic compound and the crosslinking agent constitute the adhesive are excellent in antistatic property, whitening prevention property, and reworkability, and are almost satisfactory even in heat resistance, moist heat resistance, and thermal shock resistance. The result. In particular, Example 2 has excellent performances such as antistatic property, whitening prevention property, reworkability, heat resistance, moist heat resistance, and thermal shock resistance. On the other hand, Comparative Examples 1 to 3 containing 20 parts by weight or more of an acrylic resin derived from a structural unit having an aromatic ring-containing unsaturated monomer, and @ using no unsaturated monomer derived from an aromatic ring were used. In Comparative Example 4 of the acrylic resin of the structural unit, the whitening prevention property was insufficient. Further, Comparative Example 5, which did not reach the gel fraction of the present invention, was found to have a change in appearance such as floating, peeling, foaming, etc. in the heat resistance test, the damp heat resistance test, and the heat shock test. On the other hand, Comparative Example 6 using an acrylic resin having a large molecular weight distribution obtained a result of insufficient whitening prevention. The embodiments and examples disclosed herein are illustrative only and should not be considered as limiting. The scope of the present invention is defined by the scope of the claims and the scope of the claims and the scope of the claims. [Possibility of Industrial Applicability] The optical film with an adhesive of the present invention can impart high antistatic property while maintaining the antistatic property for a long period of time, and is excellent in durability. The optical film with an adhesive is suitable for a liquid crystal display device. -52-201020306 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing an example of a preferred layer constitution of an optical laminate of the present invention. [Main component symbol description] 1 : Linear polarizing film 2 : Surface treatment layer 瘳 3 : First protective film 4 : Second protective film 5 : Polarizing plate 7 : Phase difference film 8 : Interlayer adhesive 10 : Optical film 20 : Adhesive layer 25 of ionic compound: optical film with adhesive #3 0 : liquid crystal cell (glass substrate) 40 : optical laminate -53-

Claims (1)

201020306 VII. 申锖专利范园: 1- An optical film with an adhesive, which is an optical film with an adhesive layer forming an adhesive layer on at least one side of the optical film, characterized in that the adhesive layer is contained The following adhesive composition is formed: 100 parts by weight of (A) weight average molecular weight Mw is from 10 million to 2 million, molecular weight distribution Mw / Mn (weight fraction average molecular weight (Mw) and number average molecular weight (?η) The ratio of 3 to 7 is an acrylic resin obtained from a monomer mixture containing the following (Α-1) to (Α-3), _80 to 96% by weight of (Α-1) or less ( ()) (meth) acrylate: [Chemical 1] (I) CH2=C~~C-〇-R2 (wherein Ri represents a hydrogen atom or a methyl group, and R2 represents an alkyl group which can pass through a carbon number An oxy group-substituted alkyl group having 1 to 14 carbon atoms, 3 to 15% by weight of (A-2) an unsaturated monomer having an olefinic double bond and at least one aromatic ring in the molecule, and 0.1 to 5% by weight (A-3) 0.2 to 8 parts by weight of the unsaturated monomer having a polar functional group, (B) having an organic cation and having a melting point of 80 ° C or less Protonic compound; and 0.01~5 parts by weight of (C) a crosslinking agent, the adhesive agent layer -54-201020306 having 70 to 99 wt% of the gel fraction. 2. The optical film with an adhesive according to claim 1, wherein the unsaturated monomer (A-2) having an olefinic double bond and at least one aromatic ring in the molecule is represented by the following formula (II) Aromatic ring (meth)acrylic monomer: [Chemical 2] CH2=c-jj-〇-(c2H4〇)^-^^r 0 A R4 (Π) (wherein R3 represents a hydrogen atom or a methyl group, η is an integer from 1 to 8, and IU is a hydrogen atom, an alkyl group, an aralkyl group or an aryl group). 3. The optical film with an adhesive according to claim 1, wherein the polar functional group of the polar functional group-containing unsaturated monomer (A-3) is selected from the group consisting of a free carboxyl group, a hydroxyl group, an amine group, and an epoxy group. A group of base rings. 4. The optical film with an adhesive according to claim 3, wherein the crosslinking agent (C) comprises an isocyanate compound. The optical film with an adhesive according to the first aspect of the invention, wherein the ionic compound (B) having an organic cation has a melting point of 30 ° C or more. 6. The optical film with an adhesive according to claim 1, wherein the adhesive composition further contains 0.03 to 1 part by weight of the (D) decane compound. -55- 201020306 7. The optical film with an adhesive according to claim 1, wherein the optical film is selected from the group consisting of a polarizing plate and a retardation film. 8. The optical film with an adhesive according to claim 1, wherein a release film is adhered to the surface of the adhesive layer. An optical laminate </ RTI> characterized in that the optical film with an adhesive attached to the first aspect of the patent application is laminated on the glass substrate with its adhesive layer side ❹ -56-