KR20180035688A - Pressure-sensitive adhesive layer for organic conductive layer, pressure-sensitive adhesive composition, pressure-sensitive adhesive layer attached polarizing film, and image display device - Google Patents

Abstract

The present invention relates to a pressure-sensitive adhesive layer for use in a transparent conductive base material having an organic conductive layer including a conductive polymer on a transparent substrate in a state of being adhered to the organic conductive layer, wherein the pressure- The adhesion to the layer is 15 N / 25 mm or less. The pressure-sensitive adhesive layer of the present invention is excellent in reworkability even when it is adhered to a transparent conductive base material having an organic conductive layer on a transparent base material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure-sensitive adhesive layer for an organic conductive layer, a pressure-sensitive adhesive composition, a polarizing film on which a pressure-sensitive adhesive layer is formed,

The present invention relates to a pressure-sensitive adhesive layer to be used by bonding a transparent conductive base material having an organic conductive layer on a transparent substrate to the organic conductive layer, and a pressure-sensitive adhesive composition for use in forming the pressure-sensitive adhesive layer for the organic conductive layer . The present invention also relates to a polarizing film on which a pressure-sensitive adhesive layer having the pressure-sensitive adhesive layer is formed. The present invention also relates to an image display panel comprising a transparent conductive base material having an organic conductive layer to which a polarizing film on which the pressure-sensitive adhesive layer is formed is applied. Further, the present invention relates to an image display apparatus including the image display panel.

In a liquid crystal panel used in an image display panel, for example, a liquid crystal display device or the like, a polarizing film is laminated on both sides of a liquid crystal cell formed of a liquid crystal layer disposed between a pair of transparent substrates with an adhesive layer interposed therebetween . Such a pressure-sensitive adhesive layer is required to have high durability. For example, in the durability test such as heating and humidification, which is normally conducted as an environmental promotion test, it is required that no problems such as peeling or lifting due to the pressure- .

Such a pressure-sensitive adhesive composition for optical use has been studied variously, and for example, there has been proposed a pressure-sensitive adhesive composition that does not cause peeling or foaming even when the optical film is adhered (adhered) under high humidity and heat conditions See, for example, Patent Document 1).

Japanese Laid-Open Patent Publication No. 2009-242767

A transparent conductive film such as an indium tin oxide (ITO) thin film is formed on one transparent substrate (for example, a glass plate) of a liquid crystal cell constituting a liquid crystal panel. As an alternative to the ITO thin film, an organic conductive film using a conductive polymer may be used as a transparent conductive thin film. However, the organic conductive film tends to have higher adhesive force with the pressure-sensitive adhesive layer as compared with an inorganic material such as a glass plate or an ITO film. The pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive composition of Patent Document 1 has high adhesion to the organic conductive layer.

On the other hand, as a pressure-sensitive adhesive layer for a liquid crystal panel, it is required that the pressure-sensitive adhesive layer be peeled off without peeling off the adhesive residue or the polarizing film even after it is attached to the liquid crystal cell. The above pressure-sensitive adhesive layer is required to have a leeck property free from such problems. However, in the above-mentioned pressure-sensitive adhesive layer, the adhesive strength to the organic conductive layer is high, which may cause problems such as adhesion residue and breakage of the polarizing plate during reworking.

Therefore, it is an object of the present invention to provide a pressure-sensitive adhesive layer having excellent reworkability even when it is adhered to a transparent conductive base material having an organic conductive layer on a transparent base material. It is another object of the present invention to provide a pressure-sensitive adhesive composition for use in forming the pressure-sensitive adhesive layer for an organic conductive layer, and to provide a polarizing film having a pressure-sensitive adhesive layer having the pressure-sensitive adhesive layer.

Another object of the present invention is to provide an image display panel comprising a transparent conductive base material having an organic conductive layer to which a polarizing film on which the pressure-sensitive adhesive layer is formed is applied. Further, it is another object of the present invention to provide an image display apparatus including the image display panel.

As a result of intensive investigations to solve the above-described problems, the present inventors have found out the following pressure-sensitive adhesive layer and have accomplished the present invention.

That is, the present invention relates to a transparent conductive base material having an organic conductive layer containing a conductive polymer on a transparent base material,

Wherein the pressure-sensitive adhesive layer has an adhesive strength of 15 N / 25 mm or less to the organic conductive layer when the thickness is 20 占 퐉.

The pressure-sensitive adhesive composition for forming the pressure-sensitive adhesive layer preferably contains a polyether compound having a reactive silyl group.

The pressure-sensitive adhesive composition for forming the pressure-sensitive adhesive layer may contain a silane coupling agent. As the silane coupling agent, an oligomer-type thiol group-containing silane coupling agent is preferred.

The present invention also provides a pressure-sensitive adhesive composition for forming the pressure-sensitive adhesive layer,

Wherein the pressure-sensitive adhesive composition has an adhesive strength to the organic conductive layer of 15 N / 25 mm or less in a pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive composition in a thickness of 20 占 퐉.

The present invention also provides a polarizing film on which a pressure-sensitive adhesive layer to be used by being attached to the organic conductive layer of a transparent conductive base having an organic conductive layer containing a conductive polymer on a transparent base is formed,

A polarizing film, and a pressure-sensitive adhesive layer.

The present invention also provides an image display panel comprising a transparent conductive base material having a polarizing film on which the pressure-sensitive adhesive layer is formed and an organic conductive layer containing a conductive polymer on the transparent base,

Wherein the pressure sensitive adhesive layer of the polarizing film on which the pressure-sensitive adhesive layer is formed is bonded to the organic conductive layer of the image display panel.

The present invention also relates to an image display device having the image display panel.

The pressure-sensitive adhesive layer of the present invention is designed so that the adhesive force to the organic conductive layer is 15 N / 25 mm or less. By controlling the adhesive force of the pressure-sensitive adhesive layer in the above-described range, it is possible to suppress the breakage of the adhesive residue and the polarizing film at the time of reworking the organic conductive layer.

1 is a cross-sectional view schematically showing an embodiment of a liquid crystal panel which is one of image display panels usable in the present invention.

The pressure-sensitive adhesive layer of the present invention is designed so that the adhesive force to the organic conductive layer when formed to a thickness of 20 占 퐉 satisfies 15 N / 25 mm or less. The adhesive force is preferably 10 N / 25 mm or less from the viewpoint of reworkability with respect to the organic conductive layer. On the other hand, the adhesive force is preferably 1 N / 25 mm or more, more preferably 3 N / 25 mm or more from the viewpoint of adhesion to the organic conductive layer.

The control of the adhesive force of the pressure-sensitive adhesive layer can be carried out by adjusting the pressure-sensitive adhesive composition or the like for forming the pressure-sensitive adhesive layer described below.

(1) In the pressure-sensitive adhesive composition, a silane coupling agent is blended to improve the adhesive strength. Depending on the type of the silane coupling agent, the adhesive strength to the organic conductive layer may become excessively large. From the above, it is possible to control the adhesive force by selecting a silane coupling agent to be blended with the pressure-sensitive adhesive composition.

For example, the adhesive strength of a pressure-sensitive adhesive layer formed of a pressure-sensitive adhesive composition containing an oligomer-type epoxy group-containing silane coupling agent is lower than that of a transparent conductive film such as a glass plate or indium tin oxide (ITO) , It is easy to cause failure of reheating. On the other hand, in the pressure-sensitive adhesive layer formed of a pressure-sensitive adhesive composition comprising a silane coupling agent containing no oligomer-type epoxy group, for example, a thiol group-containing silane coupling agent, the increase in adhesion to the organic conductive layer is small, By controlling to the above range, the reworkability can be satisfied.

(2) Further, by incorporating a polyether compound having a reactive silyl group into the pressure-sensitive adhesive composition, the adhesive strength of the pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive composition to the organic conductive layer can be controlled within the above range to satisfy the reworkability. It is considered that the polyether compound having a reactive silyl group contained in the pressure-sensitive adhesive layer shifts to the side of the organic conductive layer which is the adherend, thereby lowering the adhesive force with the organic conductive layer.

When a polyether compound having a reactive silyl group is added to the pressure-sensitive adhesive composition, an epoxy group-containing silane coupling agent may be blended as the silane coupling agent described in the above (1).

(3) Further, when the pressure-sensitive adhesive composition is prepared, the storage elastic modulus of the obtained pressure-sensitive adhesive layer is increased to make the pressure-sensitive adhesive layer harder. By controlling the adhesive force of the pressure-sensitive adhesive layer formed on the pressure- The workability can be satisfied. The storage elastic modulus can be controlled by adjusting the amount of the crosslinking agent or by copolymerizing high Tg monomers. The storage elastic modulus of the pressure-sensitive adhesive layer is preferably 0.01 to 10 MPa, more preferably 0.05 to 5 MPa, more preferably 0.1 to 1 MPa at 23 캜.

≪ Measurement of shear storage elastic modulus &

The shear storage modulus at 23 占 폚 was determined by dynamic viscoelasticity measurement. The pressure-sensitive adhesive layer of the measurement sample was measured at a temperature of -20 to 100 占 폚 at a temperature of 1 Hz using a dynamic viscoelasticity measuring apparatus ("ARES", manufactured by T.A. ° C / minute to calculate the shear storage modulus at 23 ° C.

(4) Further, when the pressure-sensitive adhesive composition is prepared, the adhesive force of the pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive composition to the organic conductive layer is controlled within the above range by increasing the gel fraction of the pressure- The workability can be satisfied.

The gel fraction can be controlled by adjusting the amount of the crosslinking agent. The gel fraction of the pressure-sensitive adhesive layer is preferably 60 to 98% by weight, more preferably 65 to 95% by weight, further preferably 70 to 90% by weight.

≪ Measurement of gel fraction &

A predetermined amount (initial weight W1) of the measurement sample was taken out from the pressure-sensitive adhesive layer, immersed in an ethyl acetate solution, allowed to stand at room temperature for 1 week and then insoluble matter was taken out and dried weight (W2) Was obtained as follows.

Gel fraction = (W2 / W1) x100.

(5) On the other hand, the pressure-sensitive adhesive layer whose adhesive force is controlled in the above-mentioned range is applied to an image display panel (including an image display device) having a transparent conductive base material having an organic conductive layer as a polarizing film on which a pressure-sensitive adhesive layer is formed. That is, since the pressure-sensitive adhesive layer is applied to an image display panel having a polarizing film / pressure-sensitive adhesive layer / organic conductive layer / transparent substrate structure, from the viewpoint of the constitution of the image display panel, The adhesive force of the pressure-sensitive adhesive layer can be lowered in consideration of the relationship of the conductive layer.

For example, polythiophene may be used as the conductive polymer used for the organic conductive layer. The polythiophene typically comprises a polystyrenesulfonic acid component as a dopant. Therefore, a polystyrene sulfonic acid component is also contained in the organic conductive layer. It is considered that the polystyrene sulfonic acid component increases the adhesion with the pressure-sensitive adhesive layer. Particularly, when an epoxy group-containing silane coupling agent is contained in the pressure-sensitive adhesive layer, the adhesiveness remarkably increases due to the reaction (reaction of the sulfonic acid group and the epoxy group) with the polystyrenesulfonic acid component contained in the organic conductive layer.

As described above, when a polythiophene is used as the conductive polymer used for the organic conductive layer, and a polystyrene sulfo acid component is contained as the dopant, the pressure-sensitive adhesive layer (pressure-sensitive adhesive composition) It is preferable to prepare the pressure-sensitive adhesive composition. On the other hand, when the pressure-sensitive adhesive layer (pressure-sensitive adhesive composition) contains an epoxy group-containing silane coupling agent and the conductive polymer used for the organic conductive layer is a polythiophene, the components other than the sulfonic acid- The adhesiveness of the pressure sensitive adhesive layer to the organic conductive layer is less increased by using, for example, iodine, bromine, chlorine, chlorine, etc., so that the adhesive force can be controlled within the above range to satisfy the reworkability.

1. Adhesive composition

The pressure-sensitive adhesive composition of the present invention is a pressure-sensitive adhesive composition for forming a pressure-sensitive adhesive layer to be used by being attached to the organic conductive layer of a transparent conductive base having an organic conductive layer on a transparent base. Hereinafter, the composition of the pressure-sensitive adhesive composition of the present invention will be described.

There is no particular limitation on the type of the pressure-sensitive adhesive layer to be formed. Examples of the pressure sensitive adhesive include a rubber pressure sensitive adhesive, an acrylic pressure sensitive adhesive, a silicone pressure sensitive adhesive, a urethane pressure sensitive adhesive, a vinyl alkyl ether pressure sensitive adhesive, a polyvinyl alcohol pressure sensitive adhesive, a polyvinyl pyrrolidone pressure sensitive adhesive, a polyacrylamide pressure sensitive adhesive and a cellulose pressure sensitive adhesive. Various base polymers may be used depending on the pressure-sensitive adhesive. The pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition containing a base polymer.

Among these pressure-sensitive adhesives, those having excellent optical transparency, exhibiting appropriate wettability, cohesiveness and adhesive property, and excellent weather resistance and heat resistance are preferably used. An acrylic pressure-sensitive adhesive is preferably used as this feature. As the base polymer of the acrylic pressure-sensitive adhesive, a (meth) acryl-based polymer is used.

(1) (meth) acrylic polymer

The pressure-sensitive adhesive composition of the present invention comprises a (meth) acryl-based polymer and preferably contains a (meth) acryl-based polymer as a main component. Here, the main component means a component having the highest content ratio among all the solid components contained in the pressure-sensitive adhesive composition, and is, for example, more than 50% by weight of all the solid components contained in the pressure-sensitive adhesive composition, and more preferably more than 70% Represents the component occupying.

The (meth) acryl-based polymer usually contains alkyl (meth) acrylate as a main component as a monomer unit. Further, (meth) acrylate refers to acrylate and / or methacrylate and has the same meaning as (meth) of the present invention.

Examples of the alkyl (meth) acrylate constituting the main skeleton of the (meth) acrylic polymer include linear or branched alkyl groups having 1 to 18 carbon atoms. Examples of the alkyl group include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, an amyl group, a hexyl group, a cyclohexyl group, a heptyl group, a 2-ethylhexyl group, A heptyl group, a heptyl group, a heptyl group, a heptyl group, a heptyl group, a heptyl group, a heptyl group, a heptyl group, a heptyl group, a heptyl group, These can be used alone or in combination. The average number of carbon atoms of these alkyl groups is preferably from 3 to 9.

Examples of the monomer constituting the (meth) acryl-based polymer include a carboxyl group-containing monomer, a hydroxyl group-containing monomer, an amide group-containing monomer and an aromatic ring-containing (meth) acrylate besides the alkyl (meth) acrylate.

The carboxyl group-containing monomer is a compound containing a carboxyl group in its structure and containing a polymerizable unsaturated double bond such as a (meth) acryloyl group or a vinyl group. Specific examples of the carboxyl group-containing monomers include (meth) acrylic acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, itaconic acid, maleic acid, fumaric acid and crotonic acid . Among the above-mentioned carboxyl group-containing monomers, acrylic acid is preferable from the viewpoint of copolymerization, price and adhesive property.

The hydroxyl group-containing monomer is a compound containing a hydroxyl group in its structure and containing a polymerizable unsaturated double bond such as a (meth) acryloyl group or a vinyl group. Specific examples of the hydroxyl group-containing monomer include, for example, 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) (Meth) acrylate such as hydroxyhexyl (meth) acrylate, 8-hydroxyoctyl (meth) acrylate, 10-hydroxydecyl (meth) acrylate and 12- ) Acrylate and (4-hydroxymethylcyclohexyl) -methylacrylate. Among the hydroxyl group-containing monomers, 2-hydroxyethyl (meth) acrylate and 4-hydroxybutyl (meth) acrylate are preferable from the standpoint of durability, and 4-hydroxybutyl (meth) desirable.

The amide group-containing monomer is a compound containing an amide group in its structure and containing a polymerizable unsaturated double bond such as a (meth) acryloyl group or a vinyl group. Specific examples of the amide group-containing monomer include (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, N-isopropylacrylamide, N-propyl (meth) acrylamide, N-methyl (meth) acrylamide, N-methyl Acrylamide monomers such as N- (meth) acrylamide, aminoethyl (meth) acrylamide, mercaptomethyl (meth) acrylamide and mercaptoethyl Acryloyl heterocyclic monomers such as (meth) acryloylpiperidine and N- (meth) acryloylpyrrolidine, N-vinylpyrrolidone such as N-vinylpyrrolidone and N-vinyl-epsilon -caprolactam Containing lactam-based monomer, and the like. The amide group-containing monomer is preferred for satisfying the durability, and among the amide group-containing monomers, the N-vinyl group-containing lactam monomer is particularly preferable for satisfying the durability against the organic conductive layer.

The aromatic ring-containing (meth) acrylate is a compound containing an aromatic ring structure in its structure and further containing a (meth) acryloyl group. Examples of the aromatic ring include a benzene ring, a naphthalene ring, and a biphenyl ring. The aromatic ring-containing (meth) acrylate can satisfy the durability (especially, the durability against the organic conductive layer).

Specific examples of the aromatic ring-containing (meth) acrylate include benzyl (meth) acrylate, phenyl (meth) acrylate, o-phenylphenol (meth) acrylate, phenoxy (Meth) acrylate, phenoxyethyl (meth) acrylate, phenoxyethyl (meth) acrylate, phenoxydiethylene glycol (meth) acrylate, ethylene oxide modified nonylphenol (Meth) acrylates such as ethylene oxide modified (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, methoxybenzyl (meth) acrylate, chlorobenzyl (Meth) acrylate, 2-naphthoyl (meth) acrylate, 2-naphthoxyethyl acrylate, 2- (4-methylphenyl) Lt; / RTI > Naphthoxy) ethyl (meth) acrylate; and those having a biphenyl ring such as biphenyl (meth) acrylate.

The carboxyl group-containing monomer, the hydroxyl group-containing monomer, the amide group-containing monomer and the aromatic ring-containing (meth) acrylate are reaction points with the crosslinking agent when the pressure-sensitive adhesive composition contains a crosslinking agent. In particular, carboxyl group-containing monomers and hydroxyl group-containing monomers are preferably used because they are rich in reactivity with an intermolecular crosslinking agent, and therefore, improve the cohesiveness and heat resistance of the resulting pressure-sensitive adhesive layer.

The (meth) acryl-based polymer used in the present invention preferably contains the above monomers as monomer units in the following amounts by weight of the total constituent monomers (100% by weight).

The weight ratio of the alkyl (meth) acrylate may be set as the remainder of the monomer other than the alkyl (meth) acrylate, and it is preferably 70 wt% or more. Setting the weight ratio of the alkyl (meth) acrylate to the above range is preferable in securing adhesiveness.

The weight ratio of the carboxyl group-containing monomer is preferably 10% by weight or less, more preferably 0.01 to 10% by weight, still more preferably 0.05 to 5% by weight, still more preferably 0.05 to 3% 1% by weight is particularly preferable. When the weight ratio of the carboxyl group-containing monomer is less than 0.01% by weight, the durability tends not to be satisfied. On the other hand, if it exceeds 10% by weight, the reworkability tends to be unsatisfactory, which is not preferable.

The weight ratio of the hydroxyl group-containing monomer is preferably 3% by weight or less, more preferably 0.01 to 3% by weight, further preferably 0.1 to 2% by weight, particularly preferably 0.2 to 2% by weight. When the weight ratio of the hydroxyl group-containing monomer is less than 0.01% by weight, the pressure-sensitive adhesive layer tends to undergo crosslinking and tends not to satisfy durability and adhesive properties. On the other hand, when it exceeds 3% by weight, durability tends not to be satisfied.

The proportion by weight of the amide group-containing monomer is preferably 10% by weight or less, more preferably 0.1 to 10% by weight, further preferably 0.3 to 8% by weight, further preferably 0.3 to 5% by weight, 4% by weight is particularly preferable. When the weight ratio of the amide group-containing monomer is less than 0.1% by weight, the durability to the organic conductive layer tends to be unsatisfactory. On the other hand, if it exceeds 10% by weight, durability and adhesion tend to be deteriorated, which is not preferable.

The weight ratio of the aromatic ring-containing (meth) acrylate is preferably 25% by weight or less, more preferably 0 to 22% by weight, and still more preferably 0 to 18% by weight. When the weight ratio of the aromatic ring-containing (meth) acrylate exceeds 25% by weight, the durability tends to be lowered.

In the (meth) acryl-based polymer, it is not necessary to contain other monomer units in addition to the monomer unit. For the purpose of improving the adhesiveness and heat resistance, it is preferable to use an unsaturated double bond such as a (meth) acryloyl group, One or more kinds of copolymerizable monomers having a polymerizable functional group having a bond can be introduced by copolymerization.

The proportion of the copolymerizable monomer in the (meth) acrylic polymer is preferably 0 to 10% by weight, more preferably 0 to 7% by weight in the weight ratio of the total constituent monomer (100% by weight) By weight, more preferably about 0 to 5% by weight.

The (meth) acrylic polymer of the present invention is usually one having a weight average molecular weight of 1,000,000 to 2,500,000. In consideration of durability, particularly heat resistance, the weight average molecular weight is preferably 1.2 to 2 million. If the weight average molecular weight is less than 1,000,000, it is not preferable from the viewpoint of heat resistance. On the other hand, if the weight average molecular weight is larger than 2.5 million, the pressure-sensitive adhesive tends to be hardened, and peeling easily occurs. The weight average molecular weight (Mw) / number average molecular weight (Mn) representing the molecular weight distribution is preferably from 1.8 to 10, more preferably from 1.8 to 7, and even more preferably from 1.8 to 5. When the molecular weight distribution (Mw / Mn) exceeds 10, it is not preferable from the viewpoint of durability. The weight average molecular weight and the molecular weight distribution (Mw / Mn) are determined from the value measured by GPC (gel permeation chromatography) and calculated by polystyrene conversion.

Such (meth) acryl-based polymers can be suitably selected from known production methods such as solution polymerization, bulk polymerization, emulsion polymerization, and various radical polymerization. The (meth) acryl-based polymer to be obtained may be any of a random copolymer, a block copolymer, a graft copolymer and the like.

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

The polymerization initiator, chain transfer agent and emulsifier used in the radical polymerization are not particularly limited and can be appropriately selected and used. The weight average molecular weight of the (meth) acryl-based polymer can be controlled by the amount of the polymerization initiator, the amount of the chain transfer agent used, and the reaction conditions.

Examples of the polymerization initiator include azo compounds such as 2,2'-azobisisobutyronitrile, 2,2'-azobis (2-amidinopropane) dihydrochloride, 2,2'-azobis [2- Azobis (N, N ', N'-tetramethyluronium tetrafluoroborate), 2,2'-azobis Azobis [N- (2-carboxyethyl) -2-methylpropionamidine] hydrate (trade name: VA-057, manufactured by Kowa Pure Chemical Industries, Ltd.) (2-ethylhexyl) peroxydicarbonate, di (4-t-butylcyclohexyl) peroxydicarbonate, di-sec-butylperoxydi Carbonate, t-butyl peroxyneodecanoate, t-hexyl peroxy pivalate, t-butyl peroxy pivalate, dilauryl peroxide, di-n-octanoyl peroxide, 1,1,3,3 - tetramethylbutyl peroxy-2-ethyl hexanoate, Peroxide such as di (4-methylbenzoyl) peroxide, dibenzoyl peroxide, t-butyl peroxyisobutyrate, 1,1-di (t-hexylperoxy) cyclohexane, A system initiator, a combination of persulfate and sodium hydrogen sulfite, a redox initiator combined with a peroxide such as a combination of peroxide and sodium ascorbate, and a reducing agent, but the present invention is not limited thereto.

The content of the whole is preferably about 0.005 to 1 part by weight, more preferably about 0.02 to 1 part by weight based on 100 parts by weight of the total amount of the monomer components, More preferably about 0.5 part by weight.

In addition, in the case of using, for example, 2,2'-azobisisobutyronitrile as the polymerization initiator and preparing the (meth) acrylic polymer having the weight average molecular weight, the amount of the polymerization initiator to be used is preferably such that the total amount of the monomer components Is preferably about 0.06 to about 0.2 part by weight, more preferably about 0.08 to about 0.175 part by weight, based on 100 parts by weight.

As the chain transfer agent, emulsifier and the like, conventionally known ones can be suitably used. The addition amount thereof can also be appropriately determined within a range that does not impair the effect of the present invention.

(2) Silane coupling agent

The pressure-sensitive adhesive composition of the present invention may contain a silane coupling agent. By using a silane coupling agent, durability can be improved. As the silane coupling agent, those having any appropriate functional group can be used. Examples of the functional group include a vinyl group, an epoxy group, an amino group, a mercapto group, a (meth) acryloxy group, an acetacetyl group, an isocyanate group, a styryl group and a polysulfide group. Specific examples thereof include vinyl group-containing silane coupling agents such as vinyltriethoxysilane, vinyltripropoxysilane, vinyltriisopropoxysilane and vinyltributoxysilane; gamma -glycidoxypropyltrimethoxy Epoxy group-containing silane coupling agents such as silane,? -Glycidoxypropyltriethoxysilane, 3-glycidoxypropylmethyldiethoxysilane and 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane; Aminopropyltrimethoxysilane, N- (aminoethyl) -? - aminopropylmethyldimethoxysilane, N- (2-aminoethyl) 3-aminopropylmethyldimethoxysilane,? -Triethoxysilyl-N Amino group-containing silane coupling agents such as - (1,3-dimethylbutylidene) propylamine and N-phenyl- -aminopropyltrimethoxysilane; mercapto group-containing silanes such as? -Mercaptopropylmethyldimethoxysilane Coupling agent, styryl group-containing silane coupling agent such as p-styryltrimethoxysilane (Meth) acryl group-containing silane coupling agents such as? -Acryloxypropyltrimethoxysilane and? -Methacryloxypropyltriethoxysilane; isocyanate group-containing silane coupling agents such as 3-isocyanatepropyltriethoxysilane; And polysulfide group-containing silane coupling agents such as bis (triethoxysilylpropyl) tetrasulfide.

As the silane coupling agent, those having a plurality of alkoxysilyl groups in the molecule may also be used. Concretely, for example, X-41-1053, X-41-1059A, X-41-1056, X-41-1805, X-41-1818, X-41-1810, X- -2651. These coupling agents are difficult to be volatilized and are preferable for enhancing the durability in view of having a plurality of alkoxysilyl groups.

The silane coupling agent may be used alone or in admixture of two or more. The content of the silane coupling agent as a whole is preferably from 0.001 to 5 parts by weight of the silane coupling agent per 100 parts by weight of the (meth) acrylic polymer More preferably 0.01 to 1 part by weight, further more preferably 0.02 to 1 part by weight, still more preferably 0.05 to 0.6 part by weight. The durability is improved, and the adhesion to the organic conductive layer is appropriately maintained.

(2-1) Thiol group-containing silane coupling agent

In the present invention, it is preferable that the pressure-sensitive adhesive composition contains a thiol group-containing silane coupling agent. By including a thiol group-containing silane coupling agent in the pressure-sensitive adhesive composition, it is possible to improve the durability of the pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive composition and also to improve the workability. Among the thiol group-containing silane coupling agents, oligomer-type thiol group-containing silane coupling agents are particularly effective for improving durability and reworkability. Here, the oligomer type refers to a polymer of about 2 or more but less than 100 moles of the monomer. The weight average molecular weight of the oligomer type silane coupling agent is preferably about 300 to 30,000.

As the oligomer-type thiol group-containing silane coupling agent, an oligomer type thiol group-containing silane coupling agent having at least two alkoxysilyl groups in the molecule is preferred. Specific examples thereof include X-41-1805, X-41-1810, and X-41-1818 manufactured by Shin-Etsu Chemical Co., These coupling agents are difficult to volatilize and are preferable because they have a plurality of alkoxysilyl groups and are effective for improving durability and reworkability.

Examples of the thiol group-containing silane coupling agent other than the oligomer type include 3-mercaptopropyltrimethoxysilane and? -Mercaptopropylmethyldimethoxysilane. Concretely, for example, KBM-803 manufactured by Shin-Etsu Chemical Co., Ltd. and the like can be mentioned.

The number of alkoxysilyl groups of the thiol group-containing silane coupling agent is not particularly limited, but is preferably two or more in the molecule. The amount of the alkoxy group of the thiol group-containing silane coupling agent is preferably 10 to 60% by weight, more preferably 20 to 50% by weight, and even more preferably 20 to 40% by weight in the silane coupling agent Do.

Examples of the alkoxy group include, but are not limited to, alkoxy groups having 1 to 6 carbon atoms such as methoxy, ethoxy, propoxy, butoxy, pentyloxy, and hexyloxy. Among them, methoxy and ethoxy are preferable, and methoxy is more preferable. It is also preferable that both of methoxy and ethoxy are contained in one molecule.

The thiol equivalent (mercapto equivalent) of the thiol group-containing silane coupling agent is preferably 1000 g / mol or less, more preferably 800 g / mol or less, even more preferably 700 g / mol or less, more preferably 500 g / mol Or less. The lower limit of the thiol equivalent is not particularly limited. However, when the thiol group-containing silane coupling agent is an oligomer type, it is preferably 200 g / mol or more, for example.

The thiol group-containing silane coupling agent (particularly, oligomer-type thiol group-containing silane coupling agent) may be used singly or in combination of two or more kinds. The total content of the thiol group- Is preferably 0.01 to 6 parts by weight, more preferably 0.01 to 3 parts by weight, still more preferably 0.05 to 1 part by weight, based on the weight of the composition. By containing the thiol group-containing silane coupling agent in the above range, durability of the pressure-sensitive adhesive layer can be improved, durability particularly in a humidifying environment is excellent, and the workability can be improved.

(3) Polyether compound having reactive silyl group

The pressure-sensitive adhesive composition of the present invention may contain a polyether compound having a reactive silyl group. The polyether compound is preferable in that it can improve the workability. As the polyether compound, for example, those disclosed in JP-A-2010-275522 can be used.

The polyether compound having a reactive silyl group is a polyether compound having a polyether skeleton and at least one terminal of which is represented by the following general formula (1): - SiR _a M _3-a

(Wherein R is a monovalent organic group having 1 to 20 carbon atoms which may have a substituent, M is a hydroxyl group or a hydrolysable group, and a is an integer of 0 to 2. When plural R exist, May be the same or different, and when there are a plurality of M, a plurality of M's may be the same or different and have a reactive silyl group.

As the polyether compound having a reactive silyl group,

???????? R _a M _3-a Si-XY- (AO) _n -Z ????? (2)

(Wherein R is a monovalent organic group having 1 to 20 carbon atoms which may have a substituent, M is a hydroxyl group or a hydrolysable group, and a is an integer of 0 to 2. When plural R exist, A may be an oxyalkylene group having 1 to 10 carbon atoms in the linear or branched chain and n may be an integer of 1 to 10, and R < 2 > may be the same or different from each other, X represents an alkylene group having 1 to 20 carbon atoms in the form of a linear or branched chain, Y represents an ether bond, an ester bond, a urethane bond, or a carbonate bond. .

Z represents a hydrogen atom, a monovalent hydrocarbon group of 1 to 10 carbon atoms,

???????? Y ¹ -X-SiR _a M _3-a ????? (2)

Y ¹ represents a single bond, a -CO- bond, a -CONH- bond, or a -COO- bond), or a group represented by the formula:

(2B): ???????? - Q {- (OA) _n -YX-SiR _a M _3-a } _m

Q is a hydrocarbon group of 1 to 10 carbon atoms having a valence of at least 2, m is an integer of 1 to 10, m is an integer of 1 to 10, m is an integer of 1 to 10, Is the same as the number of hydrocarbons in the hydrocarbon group).

Examples of the polyether compound having a reactive silyl group include MS Polymer S203, S303, S810; SILYL EST250, EST280; SAT10, SAT200, SAT220, SAT350, SAT400 manufactured by Ganeca, EXCESTAR S2410, S2420, or S3430.

The proportion of the polyether compound in the pressure-sensitive adhesive composition of the present invention is preferably 0.001 to 10 parts by weight based on 100 parts by weight of the (meth) acryl-based polymer. If the amount of the polyether compound is less than 0.001 part by weight, the effect of improving the workability may not be sufficient. The polyether compound is preferably at least 0.01 part by weight, more preferably at least 0.1 part by weight. On the other hand, if the polyether compound is more than 10 parts by weight, it is not preferable from the viewpoint of durability. The amount of the polyether compound is preferably 5 parts by weight or less, more preferably 2 parts by weight or less. The above-mentioned upper limit value or lower limit value can be adopted as the ratio of the polyether compound to set a preferable range.

(4) Crosslinking agent

The pressure-sensitive adhesive composition used in the present invention preferably contains a crosslinking agent. As the crosslinking agent, an organic crosslinking agent or a polyfunctional metal chelate can be used. Examples of the organic crosslinking agent include an isocyanate crosslinking agent, a peroxide crosslinking agent, an epoxy crosslinking agent, and an imine crosslinking agent. In the polyfunctional metal chelate, the polyvalent metal is covalently bonded or coordinated with the organic compound. Examples of the multivalent metal atom include Al, Cr, Zr, Co, Cu, Fe, Ni, V, Zn, In, Ca, Mg, Mn, Y, Ce, Sr, Ba, Mo, La, Sn and Ti . Examples of the reactive group in the covalent bond or the coordination bond include an oxygen atom and the like. Examples of the organic compound include an alkyl ester, an alcohol compound, a carboxylic acid compound, an ether compound and a ketone compound.

The crosslinking agent is preferably an isocyanate crosslinking agent and / or a peroxide crosslinking agent, and more preferably an isocyanate crosslinking agent and a peroxide crosslinking agent are used in combination.

As the isocyanate crosslinking agent, a compound having at least two isocyanate groups can be used. For example, known aliphatic polyisocyanates, alicyclic polyisocyanates, aromatic polyisocyanates and the like which are generally used for the urethanization reaction are used.

Examples of the aliphatic polyisocyanate include aliphatic polyisocyanates such as trimethylene diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate, pentamethylene diisocyanate, 1,2-propylene diisocyanate, 1,3-butylene diisocyanate, Isocyanate, 2,4,4-trimethylhexamethylene diisocyanate, and the like.

Examples of the alicyclic isocyanate include 1,3-cyclopentene diisocyanate, 1,3-cyclohexane diisocyanate, 1,4-cyclohexane diisocyanate, isophorone diisocyanate, hydrogenated diphenylmethane diisocyanate, Hydrogenated xylylene diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated tetramethyl xylylene diisocyanate, and the like.

Examples of the aromatic diisocyanate include aromatic diisocyanates such as phenylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 2,2'-diphenylmethane diisocyanate, 4,4'- Isocyanate, 4,4'-toluidine diisocyanate, 4,4'-diphenyl ether diisocyanate, 4,4'-diphenyl diisocyanate, 1,5-naphthalene diisocyanate, xylylene diisocyanate and the like.

Examples of the isocyanate crosslinking agent include urethane modified products obtained by reacting the above diisocyanates with polyhydric alcohols such as dimers (dimers, trimesters, pentamers), trimethylolpropane, urea modified products, urea modified products, A modified product thereof, an isocyanurate-modified product, and a carbodiimide-modified product.

Examples of commercial products of isocyanate-based crosslinking agents include trade name "Millionate MT", "Millionate MTL", "Millionate MR-200", "Millionate (trade name)" manufactured by Nippon Polyurethane Industry Co., Takenate D-120N "," Takenate D-120N "," Takenate D-120N "and" Takenate D-120N "manufactured by Mitsui Chemicals, Takenate D-160N "," Takenate D-160N "," Takenate D-165N "," Takenate D-170HN "," Takenate D-178N "," Takenate 500 "," Takenate 600 " . These compounds may be used alone or in combination of two or more.

As the isocyanate crosslinking agent, an aliphatic polyisocyanate and an aliphatic polyisocyanate compound as a modifier thereof are preferable. Compared with other isocyanate-based crosslinking agents, the aliphatic polyisocyanate-based compounds are more flexible in their crosslinked structure, easily relax stress accompanying expansion / shrinkage of the optical film, and do not easily peel off in the durability test. As the aliphatic polyisocyanate compound, hexamethylene diisocyanate and its modified product are particularly preferable.

The peroxide is not particularly limited as far as it is capable of generating radical active species by heating or light irradiation to promote crosslinking of the base polymer ((meth) acrylic polymer) of the pressure-sensitive adhesive composition. However, in consideration of workability and stability, It is preferable to use a peroxide having a temperature of 80 ° C to 160 ° C, and more preferably a peroxide having a temperature of 90 ° C to 140 ° C.

Examples of peroxides that can be used include di (2-ethylhexyl) peroxydicarbonate (1 minute half life temperature: 90.6 占 폚), di (4-t- butylcyclohexyl) peroxydicarbonate Butyl peroxyneodecanoate (1 minute half-life temperature: 103.5 占 폚), t-hexyl peroxy pivalate (1 minute), di-sec-butyl peroxydicarbonate (1 minute half-life temperature: 109.1 占 폚), t-butyl peroxypivalate (1 minute half life temperature: 110.3 占 폚), dilauroyl peroxide (1 minute half life temperature: 116.4 占 폚), di-n-octanoyl peroxide (Half-life temperature: 117.4 占 폚), 1,1,3,3-tetramethylbutylperoxy-2-ethylhexanoate (1 minute half life temperature: 124.3 占 폚), di (4-methylbenzoyl) peroxide Half-life temperature: 128.2 占 폚), dibenzoyl peroxide (one-minute half life temperature: 130.0 占 폚), t-butyl peroxyisobutyrate Between the half-life temperature: 136.1 ℃), 1,1- di (t--hexylperoxy) cyclohexane (one minute half life temperature: 149.2 ℃, and the like). Among them, di (4-t-butylcyclohexyl) peroxydicarbonate (1 minute half-life temperature: 92.1 占 폚), di rauroyl peroxide (1 minute half life temperature: 116.4 占 폚) Benzoyl peroxide (1 minute half-life temperature: 130.0 占 폚) and the like are preferably used.

The half life of the peroxide is an index indicating the rate of decomposition of the peroxide, and refers to the time until the residual amount of the peroxide becomes half. The decomposition temperature for obtaining a half life at an arbitrary time and the half life time at an arbitrary temperature are described in a manufacturer's catalog or the like. For example, the " Organic Peroxide Catalog Ninth Edition " May) ".

The amount of the crosslinking agent to be used is preferably 0.01 to 3 parts by weight, more preferably 0.02 to 2 parts by weight, and still more preferably 0.03 to 1 part by weight based on 100 parts by weight of the (meth) acryl-based polymer. If the amount of the crosslinking agent is less than 0.01 part by weight, the pressure-sensitive adhesive layer may become insufficient in cross-linking, and durability and adhesion properties may not be satisfied. On the other hand, if the amount is more than 3 parts by weight, have.

The isocyanate-based crosslinking agent may be used alone or in admixture of two or more. The content of the isocyanate-based crosslinking agent is preferably 0.01 to 2 parts by weight based on 100 parts by weight of the (meth) acryl-based polymer, More preferably 0.02 to 2 parts by weight, still more preferably 0.05 to 1.5 parts by weight. Cohesive force, prevention of peeling in the durability test, and the like.

The peroxide may be used alone or in admixture of two or more. The content of the peroxide is preferably 0.01 to 2 parts by weight based on 100 parts by weight of the (meth) acryl-based polymer, More preferably 1.5 to 1 part by weight, still more preferably 0.05 to 1 part by weight. And is appropriately selected within this range for adjustment of workability, crosslinking stability and the like.

(5) Ionic compounds

The pressure-sensitive adhesive composition of the present invention may further contain an ionic compound. The ionic compound is not particularly limited and those used in this field can be preferably used. (Perfluoroalkylsulfonyl) imide lithium salt is preferable, and bis (trifluoromethanesulfonylimide) is preferable. [0050] Lithium is more preferable. The ratio of the ionic compound is not particularly limited and may be within a range that does not impair the effects of the present invention. For example, the amount of the ionic compound is preferably 10 parts by weight or less based on 100 parts by weight of the (meth) More preferably 5 parts by weight or less, further preferably 3 parts by weight or less, and particularly preferably 1 part by weight or less.

(6) Other

The pressure-sensitive adhesive composition used in the present invention may contain other known additives. Examples thereof include polyether compounds of polyalkylene glycols such as polypropylene glycol, powders such as colorants and pigments, dyes, An antioxidant, an antioxidant, a light stabilizer, an ultraviolet absorber, a polymerization inhibitor, an inorganic or organic filler, a metal powder, a granular material, a foil-like material, And the like can be appropriately added depending on the use. Also, a redox system to which a reducing agent is added may be employed within a controllable range. These additives are preferably used in an amount of 5 parts by weight or less, more preferably 3 parts by weight or less, and further 1 part by weight or less, based on 100 parts by weight of the (meth) acryl-based polymer.

2. Pressure sensitive adhesive layer for organic conductive layer

The pressure-sensitive adhesive layer for an organic conductive layer of the present invention is characterized by being formed of the above pressure-sensitive adhesive composition. When the pressure-sensitive adhesive layer is formed, it is preferable to adjust the addition amount of the entire crosslinking agent and fully take into account the effect of the crosslinking treatment temperature and the crosslinking treatment time.

Depending on the crosslinking agent to be used, the crosslinking temperature and the crosslinking time can be adjusted. The crosslinking treatment temperature is preferably 170 占 폚 or less. The crosslinking treatment may be carried out at a temperature in the drying step of the pressure-sensitive adhesive layer, or may be carried out by forming a separate crosslinking step after the drying step. The crosslinking treatment time can be set in consideration of productivity and workability, and is usually about 0.2 to 20 minutes, preferably about 0.5 to 10 minutes.

The method of forming the pressure-sensitive adhesive layer is not particularly limited, but the pressure-sensitive adhesive composition may be applied to various substrates, and the pressure-sensitive adhesive composition may be dried by a dryer such as a heat oven to volatilize the solvent or the like, Or a method of transferring the pressure-sensitive adhesive layer onto a polarizing film or a transparent conductive substrate to be described later. Alternatively, the pressure-sensitive adhesive composition may be directly applied on the polarizing film or the transparent conductive substrate to form a pressure-sensitive adhesive layer. In the present invention, a method of previously preparing a polarizing film on which a pressure-sensitive adhesive layer is formed on a polarizing film, and then attaching the polarizing film on which the pressure-sensitive adhesive layer is formed is affixed to the liquid crystal cell.

The substrate is not particularly limited, and examples thereof include various substrates such as a release film, a transparent resin film base, and a polarizing film described later.

As a method of applying the pressure-sensitive adhesive composition to the substrate or the polarizing film, various methods are used. Specifically, there may be mentioned, for example, fountain coaters, roll coats, kiss roll coats, gravure coats, reverse coats, roll brushes, spray coats, dip roll coats, bar coats, knife coats, air knife coats, curtain coats, An extrusion coating method using a die coater or the like.

The drying conditions (temperature and time) are not particularly limited and can be appropriately set depending on the composition, concentration and the like of the pressure-sensitive adhesive composition. For example, the drying conditions (temperature and time) may be 80 to 200 ° C, preferably 90 to 170 ° C, , Preferably 2 to 30 minutes.

After drying, crosslinking treatment may be carried out if necessary, and the conditions are as described above.

The thickness of the pressure-sensitive adhesive layer (after drying) is preferably, for example, 5 to 100 占 퐉, more preferably 7 to 70 占 퐉, and further preferably 10 to 50 占 퐉. If the thickness of the pressure-sensitive adhesive layer is less than 5 占 퐉, the adhesion to the adherend becomes insufficient and the durability under heating or humidifying conditions tends to be insufficient. On the other hand, when the thickness of the pressure-sensitive adhesive layer is more than 100 占 퐉, the pressure-sensitive adhesive layer can not be completely dried at the time of application and drying of the pressure-sensitive adhesive composition at the time of forming the pressure-sensitive adhesive layer, and bubbles remain or thickness irregularities Or the like, and the appearance problem tends to become easier to present.

Examples of the constituent material of the release film include resin films such as polyethylene, polypropylene, polyethylene terephthalate and polyester films, porous materials such as paper, cloth and nonwoven fabric, nets, foamed sheets, metal foils and laminates thereof And the like, but a resin film is preferably used because of its excellent surface smoothness.

Examples of the resin film include a polyethylene film, a polypropylene film, a polybutene film, a polybutadiene film, a polymethylpentene film, a polyvinyl chloride film, a vinyl chloride copolymer film, a polyethylene terephthalate film, a polybutylene terephthalate Film, a polyurethane film, an ethylene-vinyl acetate copolymer film, and the like.

The thickness of the release film is usually 5 to 200 占 퐉, preferably 5 to 100 占 퐉. The releasing film may be subjected to antistatic treatment such as releasing treatment with a silicone, fluorine, long chain alkyl or fatty acid amide releasing agent, silica powder or the like, a coating type, a kneading type, a deposition type or the like . Particularly, the releasability from the pressure-sensitive adhesive layer can be further improved by suitably carrying out the surface treatment of the release film, such as silicone treatment, long-chain alkyl treatment or fluorine treatment.

The transparent resin film substrate is not particularly limited, but various resin films having transparency are used. The resin film is formed of a single-layer film. For example, as the material thereof, a polyester resin such as polyethylene terephthalate and polyethylene naphthalate, an acetate resin, a polyether sulfone resin, a polycarbonate resin, a polyamide resin, a polyimide resin, a polyolefin resin, (Meth) acrylic resins, polyvinyl chloride resins, polyvinylidene chloride resins, polystyrene resins, polyvinyl alcohol resins, polyarylate resins, and polyphenylene sulfide resins. Of these, particularly preferred are polyester resins, polyimide resins and polyether sulfone resins.

The thickness of the film base material is preferably 10 to 200 mu m.

3. Polarizing film formed with a pressure-sensitive adhesive layer

The polarizing film on which the pressure-sensitive adhesive layer of the present invention is formed is characterized in that the pressure-sensitive adhesive layer is provided on at least one surface of the polarizing film. The polarizing film on which the pressure-sensitive adhesive layer of the present invention is formed is used in such a manner that the pressure-sensitive adhesive layer of the polarizing film is in contact with the organic electroconductive layer of the transparent electroconductive substrate having the organic electroconductive layer on the transparent substrate.

The method of forming the pressure-sensitive adhesive layer is as described above.

The polarizing film is not particularly limited, but it is generally used that a transparent protective film is provided on one side or both sides of the polarizer.

The polarizer is not particularly limited, and various kinds of polarizers can be used. Examples of the polarizer include a hydrophilic polymer film such as a polyvinyl alcohol film, a partially porous polyvinyl alcohol film, and a partially saponified ethylene / vinyl acetate copolymer film, Polyvinyl alcohol, polyvinyl alcohol, polyvinyl alcohol, polyvinyl alcohol, polyvinyl alcohol, polyvinyl alcohol, polyvinyl alcohol, and the like. Among them, a polyvinyl alcohol film and a polarizer made of a dichroic substance such as iodine are preferable, and an iodine polarizer containing iodine and / or iodine ion is more preferable. The thickness of these polarizers is not particularly limited, but is generally about 5 to 80 탆.

The polarizer obtained by dying a polyvinyl alcohol film with iodine and uniaxially stretching can be produced by, for example, dying polyvinyl alcohol in an aqueous solution of iodine and stretching it to 3 to 7 times the original length. If necessary, may be immersed in an aqueous solution such as potassium iodide, which may contain boric acid, zinc sulfate, zinc chloride or the like. If necessary, the polyvinyl alcohol film may be dipped in water and washed with water before dyeing. The polyvinyl alcohol film can be cleaned by rinsing the surface of the polyvinyl alcohol film with water and swelling the polyvinyl alcohol film to prevent unevenness such as uneven dyeing. The stretching may be carried out after dyeing with iodine, followed by stretching while dyeing, or after stretching, followed by dyeing with iodine. It can be stretched in an aqueous solution such as boric acid or potassium iodide or in a water bath.

In the present invention, a thin polarizer having a thickness of 10 mu m or less can also be used. From the viewpoint of thinning, the thickness is preferably 1 to 7 mu m. Such a thin polarizer is preferable because it is excellent in durability because thickness irregularity is small, visibility is excellent, and dimensional change is small, and further thickness and thickness of a polarizing film are achieved.

Examples of the thin polarizer include those described in Japanese Laid-Open Patent Publication Nos. 51-069644 and 2000-338329, International Publication No. 2010/100917, Japanese Patent No. 4751481, and Japanese Laid-Open Patent Publication No. 2012-073563 And a thin polarizing film described in JP-A No. H07-336999. These thin polarizing films can be obtained by a manufacturing method including a step of stretching a layer of a polyvinyl alcohol-based resin (hereinafter also referred to as a PVA-based resin) and a lead resin base material in a laminate state, and a step of dyeing. With this method, even if the PVA resin layer is thin, it can be stretched without any problem such as breakage due to stretching because it is supported on the resin base material for drawing.

As the thin polarizing film, a pamphlet of International Publication No. 2010/100917, in view of being capable of stretching at a high magnification and improving polarization performance, including a step of stretching in a laminate state and a step of dyeing, or In the aqueous boric acid solution described in the specification of Japanese Patent No. 4751481 or the Japanese Patent Application Laid-Open Publication No. 2012-073563, and in particular, it is preferable to use a method which is disclosed in Japanese Patent No. 4751481 or Japanese Patent Application Laid-Open Publication No. 2012-073563 In a boric acid aqueous solution having a base material, and a step of auxiliary drawing publicly before stretching in an aqueous boric acid solution having a base.

As a material for forming the transparent protective film formed on one side or both sides of the polarizer, for example, a thermoplastic resin excellent in transparency, mechanical strength, thermal stability, moisture barrier property, isotropy and the like is used. Specific examples of such thermoplastic resins include cellulose resins such as triacetylcellulose, polyester resins, polyether sulfone resins, polysulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, (meth) Acrylic resin, cyclic polyolefin resin (norbornene resin), polyarylate resin, polystyrene resin, polyvinyl alcohol resin, and mixtures thereof. The transparent protective film is adhered to the one side of the polarizer by an adhesive layer while the other side of the polarizing film is provided with a thermosetting resin such as a (meth) acrylic, urethane, acrylic urethane, epoxy or silicone resin or a UV- Can be used. The transparent protective film may contain one or more optional additives. Examples of the additive include ultraviolet absorbers, antioxidants, lubricants, plasticizers, mold release agents, coloring inhibitors, flame retardants, nucleating agents, antistatic agents, pigments, colorants and the like. The content of the thermoplastic resin in the transparent protective film is preferably 50 to 100% by weight, more preferably 50 to 99% by weight, still more preferably 60 to 98% by weight, particularly preferably 70 to 97% by weight, to be. When the content of the thermoplastic resin in the transparent protective film is 50% by weight or less, there is a possibility that the high transparency and the like inherently possessed by the thermoplastic resin can not be sufficiently exhibited.

The thickness of the protective film can be appropriately determined. Generally, the thickness of the protective film is about 1 to 500 mu m in terms of workability such as strength and handling properties, and thin film properties.

The polarizer and the protective film are usually in close contact with each other via an aqueous adhesive or the like. Examples of the water-based adhesive include an isocyanate-based adhesive, a polyvinyl alcohol-based adhesive, a gelatin-based adhesive, a vinyl-based latex-based, a water-based polyurethane, and a water-based polyester. In addition to the above, examples of the adhesive for the polarizer and the transparent protective film include an ultraviolet curable adhesive, an electron beam curable adhesive, and the like. The adhesive for an electron beam curing type polarizing film exhibits favorable adhesiveness to the above various transparent protective films. The adhesive used in the present invention may contain a metal compound filler.

In the present invention, a retardation film or the like may be formed on the polarizer instead of the transparent protective film of the polarizing film. It is also possible to form another transparent protective film or a retardation film on the transparent protective film.

The surface of the transparent protective film on which the polarizer is not adhered may be subjected to treatment for the purpose of hard coat layer, anti-reflection treatment, anti-sticking, diffusion or anti-glare.

Further, an anchor layer may be provided between the polarizing film and the pressure-sensitive adhesive layer. The material for forming the anchor layer is not particularly limited, and examples thereof include various polymers, sols of metal oxides, silica sol, and the like. Of these, polymers are particularly preferably used. The polymer may be used in any of solvent-soluble type, water-dispersible type and water-soluble type.

Examples of the polymers include polyurethane resins, polyester resins, acrylic resins, polyether resins, cellulose resins, polyvinyl alcohol resins, polyvinyl pyrrolidone, and polystyrene resins have. As the polymers, a conductive polymer such as polythiophene, which can be used as a material for forming an organic conductive layer to be described later, can be used.

When the pressure-sensitive adhesive layer of the polarizing film on which the pressure-sensitive adhesive layer is formed is exposed, the pressure-sensitive adhesive layer may be protected with a release film (separator) until it is provided for practical use. Examples of the release film include those described above. When the releasing film is used as the substrate in the production of the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer on the releasing film is stuck to the polarizing film so that the releasing film can be used as a releasing film of the pressure-sensitive adhesive layer of the polarizing film on which the pressure- And it is possible to simplify the process.

The polarizing film on which the pressure-sensitive adhesive layer of the present invention is formed is used by being attached to the organic conductive layer of the transparent conductive base material having the organic conductive layer containing the conductive polymer on the transparent base material.

As a material for forming the organic conductive layer of the transparent conductive base material, the conductive polymer is preferably used from the viewpoint of stability in humidification when the optical characteristics, external appearance, antistatic effect and antistatic effect are observed. The kind of the conductive polymer is not particularly limited, and among them, a conductive polymer such as polyaniline, polythiophene and the like is preferably used. These antistatic agents classified as conductive polymers may be used alone or in combination of two or more. The conductive polymer may be any of water-soluble, water-dispersible, organic solvent-soluble, and organic solvent-dispersible. The water-soluble conductive polymer and the water-dispersible conductive polymer may be prepared in the form of an aqueous solution or an aqueous dispersion This is because it is not necessary to use a non-aqueous organic solvent and the deterioration of the transparent substrate by the organic solvent can be suppressed. Further, the aqueous solution or aqueous dispersion may contain an aqueous solvent other than water. Butanol, tert-butanol, n-amyl alcohol, isoamyl alcohol, sec-amyl alcohol, tert-amyl alcohol, l-butyl alcohol, isopropyl alcohol, isopropanol, isopropanol, n- Ethyl-1-propanol, 2-methyl-1-butanol, n-hexanol, cyclohexanol and the like.

The water-soluble electroconductive polymer such as polyaniline or polythiophene or the water-dispersible electroconductive polymer preferably has a hydrophilic functional group in the molecule. Examples of the hydrophilic functional group include a sulfone group, an amino group, an amide group, an imino group, a quaternary ammonium salt group, a hydroxyl group, a mercapto group, a hydrazino group, a carboxyl group, a sulfuric acid ester group, And the like. By having a hydrophilic functional group in the molecule, it is easy to dissolve in water or disperse in fine particles in water, so that the water-soluble electroconductive polymer or water-dispersible electroconductive polymer can be easily prepared.

To the conductive polymer, a dopant may be added as required. As the dopant, for example, a component other than the sulfonic acid-containing component (for example, iodine, bromine, chlorine, chlorine, etc.) may be used in addition to the polystyrene sulfonic acid component. As described above, when a pressure-sensitive adhesive layer (pressure-sensitive adhesive composition) contains an epoxy group-containing silane coupling agent and a conductive polymer (for example, polythiophene) used in the organic conductive layer is used, It is preferable to use a component other than the component.

Examples of commercially available water-soluble conductive polymers include polyaniline sulfonic acid (weight average molecular weight of 150000 in terms of polystyrene manufactured by Mitsubishi Rayon Co., Ltd.). Examples of commercially available water-dispersible conductive polymers include polythiophene-based conductive polymers (trade name, Denatron series, manufactured by Nagase ChemteX Co., Ltd.).

The organic conductive layer may further include an antistatic agent other than the conductive polymer. As the antistatic agent, for example, ionic compounds, conductive fine particles, organic silicon compounds and the like can be used. From these, suitable antistatic agents may be used alone or in combination of two or more.

The above-mentioned conductive polymer may also contain a binder component for the purpose of improving the film-forming property of the conductive polymer and the adhesion to the transparent substrate. When the conductive polymer is a water-soluble conductive polymer or a water-dispersible conductive polymer, a water-soluble or water-dispersible binder component is used. Examples of the binder include an oxazoline group-containing polymer, a polyurethane resin, a polyester resin, an acrylic resin, a polyether resin, a cellulose resin, a polyvinyl alcohol resin, an epoxy resin, a polyvinylpyrrolidone, , Polyethylene glycol, pentaerythritol, and the like. Particularly, a polyurethane resin, a polyester resin and an acrylic resin are preferable. These binders can be suitably used in accordance with their use.

The amount of the conductive polymer and the binder used may vary depending on the kind thereof, but it is preferable to control the surface resistance value of the obtained transparent conductive film to be 1 x 10 ⁸ to 1 x 10 ¹² ? / ?.

The organic conductive layer used in the present invention may contain other known additives such as a colorant, a powder such as a pigment, a dye, a surfactant, a plasticizer, a surface lubricant, a leveling agent, a softening agent, It may be suitably added in accordance with the use of an antioxidant, an antioxidant, a light stabilizer, an ultraviolet absorber, a polymerization inhibitor, an inorganic or organic filler, a metal powder, a particulate or a foil.

The organic conductive film may be formed on the transparent substrate by electrolytic polymerization of the monomer forming the conductive polymer.

The thickness of the organic conductive layer is not particularly limited, but is preferably 10 nm or more and 1000 nm or less, more preferably 20 nm to 400 nm, further preferably 30 nm to 300 nm.

The method of forming the organic conductive layer is not particularly limited, and conventionally known methods can be employed. Specifically, there can be mentioned a coating method in which a coating liquid containing a conductive polymer as a transparent base material is coated by using a coating method such as a coating method, a dipping method and a spraying method, followed by drying. The content of the conductive polymer in the coating liquid is not particularly limited, but is preferably about 0.2 to 30% by weight, and more preferably about 0.2 to 5% by weight. It is also possible to employ an appropriate method depending on the required film thickness.

The transparent substrate may be a transparent substrate, and the material thereof is not particularly limited, and examples thereof include glass and transparent resin film substrates. Examples of the transparent resin film substrate include those described above.

If necessary, an undercoat layer, an overcoat layer, an oligomer-preventing layer, or the like can be formed between the organic conductive layer and the transparent substrate, or between the organic conductive layer and the pressure-sensitive adhesive layer.

4. Image display panel, image display device

The image display panel of the present invention is an image display panel comprising a polarizing film on which the pressure-sensitive adhesive layer is formed and a transparent conductive base material having an organic conductive layer on the transparent base,

And the pressure sensitive adhesive layer of the polarizing film on which the pressure sensitive adhesive layer is formed is bonded to the organic conductive layer of the image display panel.

The image display device of the present invention is characterized by having the image display panel.

The polarizing film on which the pressure-sensitive adhesive layer is formed and the transparent conductive base material are as described above. The image display panel forms a part of the image display device together with the polarizing film having the transparent conductive base material and the pressure-sensitive adhesive.

A liquid crystal panel which is a representative embodiment of an image display panel to which a polarizing film having a pressure-sensitive adhesive layer of the present invention is applied will be described. The liquid crystal cell used in the liquid crystal panel is provided with a transparent conductive base material having an organic conductive layer on a transparent base material. The transparent conductive base material is usually provided on the surface of the liquid crystal cell on the viewer's side. A liquid crystal panel including a liquid crystal cell usable in the present invention will be described with reference to Fig. However, the present invention is not limited to Fig.

In one embodiment of the liquid crystal panel 1 that can be included in the image display panel of the present invention, the visibility side transparent protective film 2 / polarizer 3 / liquid crystal cell side transparent protective film 4 / The transparent protective film 11 and the polarizer 12 are laminated on the transparent substrate 9 and the transparent substrate 9 to form the liquid crystal cell side transparent protective film 11 and the liquid crystal cell side transparent protective film 11, And a transparent protective film 13 on the light source side. 1, the polarizing film on which the pressure-sensitive adhesive layer of the present invention is formed corresponds to the visibility side transparent protective film 2 / polarizer 3 / liquid crystal cell side transparent protective film 4 / pressure-sensitive adhesive layer 5. In Fig. 1, the transparent conductive base material used in the present invention is composed of the organic conductive layer 6 / the transparent base material 7. 1, the liquid crystal cell having the transparent conductive base material used in the present invention is composed of the organic conductive layer 6 / the transparent base material 7 / the liquid crystal layer 8 / the transparent base material 9.

In addition to the above configuration, an optical film such as a retardation film, a time compensation film, and a brightness enhancement film can be appropriately formed on the liquid crystal panel 1. [

The liquid crystal layer 8 is not particularly limited, and for example, an arbitrary type such as a TN type, an STN type, a pi type, a VA type, and an IPS type can be used. The transparent substrate 9 (on the light source side) may be a transparent substrate, and the material thereof is not particularly limited, and examples thereof include glass and transparent resin film substrates. Examples of the transparent resin film substrate include those described above.

As the pressure-sensitive adhesive layer 10 on the light source side, the liquid crystal cell side transparent protective film 11, the polarizer 12 and the light source side transparent protective film 13, those conventionally used in this field can be used, And those described in this specification can be preferably used.

The liquid crystal panel 1 has a structure in which a polarizing film in which the pressure sensitive adhesive layer of the present invention is formed on the organic conductive layer 6 formed on the outermost layer of the liquid crystal cell on the viewer side is laminated with the organic conductive layer 6 of the liquid crystal cell and the pressure sensitive adhesive layer And the pressure-sensitive adhesive layer (5) of the formed polarizing film is brought into contact with each other.

The image display apparatus of the present invention may be any liquid crystal panel as long as it includes an image display panel including a polarizing film on which the pressure-sensitive adhesive layer of the present invention is formed and a transparent conductive base material having an organic conductive layer on the transparent base material Do. Hereinafter, a liquid crystal display device will be described as an example, but the present invention is not limited thereto.

Specific examples of the image display device to which the image display panel can be applied include a liquid crystal display device, an electroluminescence (EL) display, a plasma display (PD), a field emission display (FED) .

The image display device of the present invention may be any image display panel including a polarizing film on which the pressure-sensitive adhesive layer of the present invention is formed and a transparent conductive base material having an organic conductive layer on the transparent base material. Device.

Example

Hereinafter, the present invention will be described in detail by way of examples, but the present invention is not limited to these examples. In addition, the room temperature and no-specified conditions, which were not specifically defined, were 23 ° C and 65% RH. to be.

<Measurement of weight average molecular weight of (meth) acryl-based polymer>

The weight average molecular weight (Mw) of the (meth) acryl-based polymer was measured by GPC (gel permeation chromatography). Mw / Mn was measured in the same manner.

· Analytical Apparatus: HLC-8120GPC manufactured by Tosoh Corporation

· Column: G7000HXL + GMHXL + GMHXL, manufactured by Tosoh Corporation

· Column size: Each 7.8 mmφ × 30 cm Total 90 cm

Column temperature: 40 ° C

Flow rate: 0.8 ml / min

· Injection volume: 100 μl

Eluent: tetrahydrofuran

Detector: Differential refractometer (RI)

· Standard sample: Polystyrene

Production Example 1 (Production of polarizing film)

A polyvinyl alcohol film having a thickness of 80 탆 was stretched to 3 times while dyeing in an iodine solution at a concentration of 0.3 wt% at 30 캜 for 1 minute between rolls having different speed ratios. Thereafter, the substrate was immersed in an aqueous solution containing boric acid at a concentration of 4 wt% at a concentration of 4 wt% and potassium iodide at a concentration of 10 wt% for 0.5 min. Subsequently, the substrate was washed by immersing it in an aqueous solution containing potassium iodide at a concentration of 1.5% by weight at 30 DEG C for 10 seconds, and then dried at 50 DEG C for 4 minutes to obtain a polarizer having a thickness of 30 mu m. A saponified triacetylcellulose film having a thickness of 80 mu m was laminated on both surfaces of the polarizer using a polyvinyl alcohol adhesive to prepare a polarizing film.

Preparation Example 2 (Preparation of solution of acrylic polymer (a-1)) [

A monomer mixture containing 99 parts by weight of butyl acrylate and 1 part by weight of 4-hydroxybutyl acrylate was injected into a four-necked flask equipped with a stirrer, a thermometer, a nitrogen gas introducing tube and a condenser. Further, 0.1 part by weight of 2,2'-azobisisobutyronitrile as a polymerization initiator was added together with 100 parts by weight of ethyl acetate per 100 parts by weight of the monomer mixture (solid content), and nitrogen gas was introduced with gentle stirring to obtain nitrogen After the replacement, the solution temperature in the flask was maintained at about 55 ° C and polymerization reaction was carried out for 8 hours to prepare a solution of the acrylic polymer (a-1) having a weight average molecular weight (Mw) of 156,000 and an Mw / Mn of 3.2.

Production Example 3

As shown in Table 1, a solution of the acrylic polymer (a-2) was prepared in the same manner as in Production Example 2, except that the kinds of the monomers used in the preparation of the acrylic polymer and the use ratio thereof were changed, Lt; / RTI &gt;

The abbreviations in Table 1 are as follows.

BA: butyl acrylate

NVP: N-vinyl-2-pyrrolidone

AA: Acrylic acid

HBA: 4-hydroxybutyl acrylate

Example 1

(Preparation of acrylic pressure-sensitive adhesive composition)

0.1 part of an isocyanate crosslinking agent (trade name: Takenate D160N, trimethylolpropane hexamethylene diisocyanate, manufactured by Mitsui Chemicals, Inc.) was added to 100 parts by weight of solids of the solution of the acrylic polymer (a-1) obtained in Production Example 2, 0.3 part of an acrylic acid-based pressure-sensitive adhesive composition (manufactured by Nippon Kayaku Co., Ltd.) and 0.3 part of an acetacetyl group-containing silane coupling agent (trade name: A-100, manufactured by Soken Chemical Co., Ltd.) Respectively.

(Production of a polarizing film having a pressure-sensitive adhesive layer)

The solution of the acrylic pressure-sensitive adhesive composition was coated on one side of a polyethylene terephthalate film (separator film, trade name: MRF38, manufactured by Mitsubishi Chemical Polyester Film Co., Ltd.) treated with a silicone-based releasing agent so that the thickness of the pressure- And dried at 155 占 폚 for 1 minute to form a pressure-sensitive adhesive layer on the surface of the separator film. Subsequently, the pressure-sensitive adhesive layer formed on the separator film was transferred to the polarizing film produced in Production Example 1 to prepare a polarizing film having a pressure-sensitive adhesive layer.

Examples 2 to 7 and Comparative Examples 1 to 2

A solution of an acrylic pressure sensitive adhesive composition was prepared in the same manner as in Example 1, except that the kind of the acrylic polymer, the kind of the silane coupling agent, and the amount thereof were changed as shown in Table 2 in Example 1. In Examples 2, 4 and 7, polyether compounds having reactive silyl groups were compounded in the ratios shown in Table 2, and in Examples 6 and 7 and Comparative Example 2, ionic compounds were compounded in ratios shown in Table 2 . Using the obtained solution of the acrylic pressure-sensitive adhesive composition, a polarizing film having a pressure-sensitive adhesive layer formed thereon was prepared in the same manner as in Example 1.

The following evaluations were performed on the polarizing films on which the pressure-sensitive adhesive layer was formed, obtained in the above-mentioned Examples and Comparative Examples. The evaluation results are shown in Table 2.

«Adhesion»

The polarizing film on which the pressure-sensitive adhesive layer obtained in Examples and Comparative Examples was formed was cut into a 25-mm-wide sample for evaluation. The sample was adhered to a glass transparent organic conductive film on which an organic conductive layer was formed, using a laminator. Subsequently, the sample was autoclaved at 50 DEG C and 0.5 MPa for 15 minutes, and the sample was adhered to the glass on which the transparent organic conductive film was formed (initial). The adhesion of these samples was measured. The adhesive strength was obtained by measuring the adhesive force (N / 25 mm) when the sample was pulled off by a tensile tester (Autograph SHIMAZU AG-1 10KN) at a peeling angle of 90 ° and a peeling speed of 300 mm / min. The measurement was performed at intervals of once / 0.5 s, and the average value was used as a measurement value.

<Workability>

A polarizing film on which the pressure-sensitive adhesive layer obtained in Examples and Comparative Examples was formed was cut into a sample of 350 mm in length and 250 mm in width as samples. This sample was bonded to a glass on which an organic conductive layer was formed. As the glass having the organic conductive layer formed thereon, a glass in which an organic conductive film having an organic conductive film was formed on a non-alkali glass (trade name: EG-XG, Corning) having a thickness of 0.7 mm was used. The organic conductive film was formed by spin coating using a coating solution containing a polyethylene dioxythiophene polystyrenesulfonate salt.

The sample was peeled off from the glass on which the organic conductive layer was formed by human hands, and the reworkability was evaluated based on the following criteria. The evaluation of the reworkability was carried out by repeating three times and three times in the above order.

◎: All 3 sheets can be peeled off without peeling of adhesive residue or film.

&Amp; cir &amp;: Part of the three films were peeled off by re-peeling, though the film was broken.

?: The film was broken in all three sheets, but peeling was possible by re-peeling.

X: All of the three sheets were peeled off due to peeling of the film even if adhesive residue was generated or peeled several times.

Reference Examples 1 to 3

A solution of an acrylic pressure sensitive adhesive composition was prepared in the same manner as in Example 1, except that the kind of the acrylic polymer, the kind of the silane coupling agent, and the amount thereof were changed as shown in Table 2 in Example 1. Reference Example 3 is the same as Example 6.

The polarizing film on which the pressure-sensitive adhesive layer was formed, obtained in Reference Example, was evaluated in the same manner as described above. The evaluation results are shown in Table 2. In Reference Example 1, an alkali-free glass having no organic conductive layer was used in place of glass having an organic conductive layer formed thereon as an adherend. In Reference Examples 2 and 3, a glass on which an ITO layer having an amorphous ITO layer was formed on the alkali-free glass as the adherend was used. The ITO layer was formed by sputtering. The composition of ITO was 3 wt% of Sn, and the sample was subjected to a heating process at 140 DEG C for 60 minutes before bonding. The Sn ratio of ITO was calculated from the weight of Sn atom / (weight of Sn atom + weight of In atom).

The abbreviations in Table 2 are as follows.

Isocyanate type: trade name: Takenate D160N, trimethylolpropane hexamethylene diisocyanate, manufactured by Mitsui Chemicals, Inc .;

Peroxide system: Product name: Nippa BMT 40SV, benzoyl peroxide, manufactured by Nippon Oil and Fats Co., Ltd.

A-100: Trade name A-100: Acetacetyl group-containing silane coupling agent, manufactured by Soken Chemical & Engineering Co., Ltd.;

X-41-1810: Oligomer-type thiol group-containing silane coupling agent, amount of alkoxy group: 30% by weight, thiol equivalent: 450 g / mol, manufactured by Shin-Etsu Chemical Co.,

X-41-1056: oligomer type epoxy group-containing silane coupling agent, amount of alkoxy group: 17% by weight, epoxy equivalent: 280 g / mol, manufactured by Shin-Etsu Chemical Co.,

SAT10: Product name CYLYL SAT10: Polyether compound having reactive silyl group (manufactured by KANEKA CO., LTD.);

Ionic compound: bis (trifluoromethanesulfonylimide) lithium, manufactured by Mitsubishi Materials Corporation.

1: liquid crystal panel
2: transparent protective film on the poet side
3: Polarizer
4: Transparent protective film of liquid crystal cell side
5: Pressure-sensitive adhesive layer
6: organic conductive layer
7: transparent substrate
8: liquid crystal layer
9: transparent substrate
10: pressure-sensitive adhesive layer
11: Transparent protective film on the liquid crystal cell side
12: Polarizer
13: transparent protective film on the light source side

Claims (7)

A transparent conductive base material having an organic conductive layer containing a conductive polymer on a transparent base material, the organic conductive layer pressure-
Wherein the pressure-sensitive adhesive layer has an adhesive force of 15 N / 25 mm or less to the organic conductive layer when the thickness is 20 占 퐉. The method according to claim 1,
Wherein the pressure-sensitive adhesive composition for forming the pressure-sensitive adhesive layer contains a polyether compound having a reactive silyl group. The method according to claim 1,
Wherein the pressure-sensitive adhesive composition for forming the pressure-sensitive adhesive layer contains a silane coupling agent. A pressure-sensitive adhesive composition for forming the pressure-sensitive adhesive layer according to claim 1,
Wherein the pressure-sensitive adhesive composition has an adhesive force to the organic conductive layer of 15 N / 25 mm or less in a pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive composition having a thickness of 20 占 퐉. A polarizing film on which a pressure-sensitive adhesive layer to be used by being attached to the organic conductive layer of a transparent conductive base having an organic conductive layer containing a conductive polymer on a transparent base is formed,
A polarizing film on which a pressure-sensitive adhesive layer having a polarizing film and the pressure-sensitive adhesive layer according to any one of claims 1 to 3 is formed. An image display panel comprising a polarizing film on which a pressure-sensitive adhesive layer according to claim 5 is formed, and a transparent conductive base material having an organic conductive layer on the transparent base material,
Wherein the pressure sensitive adhesive layer of the polarizing film on which the pressure-sensitive adhesive layer is formed is bonded to the organic conductive layer of the image display panel. An image display apparatus having the image display panel according to claim 6.

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