KR20110003062A - Resin composition for touchscreen, pressure-sensitive adhesive film and touchscreen - Google Patents

Abstract

PURPOSE: A resin composition for touchscreen is provided to ensure excellent adhesive property, level difference absorption, durability and cuttability and to suppress resistance alteration of an electrode layer when left in a severe condition. CONSTITUTION: A resin composition for touchscreen comprises an adhesive base resin and an organic salt. The adhesive base resin is an acrylic resin. The organic salt comprises nitrogen onium cation. An adhesive film(10) for the touchscreen includes a first base film or a first release film(12a), a pressure-sensitive layer(11) containing the resin composition, and a second base film or a second release film(12b).

Description

Resin composition for touch screen, adhesive film and touch screen {Resin composition for touchscreen, pressure-sensitive adhesive film and touchscreen}

The present invention relates to a resin composition for a touch screen, an adhesive film and a touch screen.

In recent years, PDAs, mobile communication terminals or vehicle navigation systems have formed a large market. Technical targets mainly pursued for such electronic devices include thinning, weight reduction, low power consumption, high resolution, and high brightness.

On the other hand, an electronic device provided with a touch screen or a touch panel switch on an input operation part is based on a transparent conductive plastic film, for example, a polyethylene terephthalate film, for its light weight, prevention of cracking, and the like. The film in which the conductive layer, such as Oxide), was formed is laminated | stacked on the conductive glass, a reinforcing material, a deco film, etc. by the adhesive layer.

The pressure-sensitive adhesive layer used for the attachment of the transparent conductive film in the touch screen or the touch panel includes a step absorbency capable of absorbing the printing step caused by the decor film; Durability, in which curling or air bubbles can be suppressed even when exposed to harsh conditions such as high temperature and / or high humidity conditions; Cutting ability to suppress squeaking or pressing when cutting; And excellent properties such as excellent adhesion to various substrates.

In addition, as the capacitive touch screen or the touch panel increases in recent years, the pressure-sensitive adhesive layer is required to suppress a change in resistance of a transparent electrode such as ITO.

In other words, the touch screen or touch panel is exposed to various environments during manufacture, storage, transportation, and sale. In particular, when exposed to harsh conditions such as high temperature and / high humidity conditions, a large change in resistance occurs in the included electrode. This may cause serious damage or failure of the product.

The present invention is to provide a resin composition for a touch screen, an adhesive film and a touch screen which is excellent in adhesiveness, step absorption, durability and cutting properties, and can effectively suppress the change in resistance of the electrode layer even when left in a severe condition for a long time. The purpose.

The present invention provides a resin composition for a touch screen including a sticky base resin and an organic salt as a means for solving the above problems.

The present invention is another means for solving the above problems, a first base film or a first release film; An adhesive layer formed on the first base film or the first release film and containing the resin composition according to the present invention described above; And a second base film or a second release film formed on an upper portion of the adhesive layer.

According to another aspect of the present invention, there is provided a device including: a first substrate having a first electrode layer attached to one surface by an adhesive layer; And a second substrate attached to one surface by an adhesive layer, and a second substrate spaced apart from the first substrate so that the second electrode layer faces the first electrode layer.

The adhesive layer to which the first or second electrode layer is attached provides a touch screen including a cured product of the resin composition according to the present invention.

The resin composition of the present invention has excellent adhesion to various substrates, has excellent step absorption, durability, and cutting property, and can effectively suppress the resistance change of the electrode layer (ex. ITO electrode) under particularly heat and / or moisture resistance conditions. have. Accordingly, the resin composition of the present invention can be excellently applied to the bonding of the decor film or the plastic film (ex. Polycarbonate film) and the electrode layer, especially in various touch screens or touch panels.

The present invention is an adhesive base resin; And it relates to a resin composition for a touch screen containing an organic salt.

Hereinafter, the resin composition for touch screens of the present invention will be described in detail.

The kind of adhesive base resin which can be used by this invention is not specifically limited, General resin of this field can be used. Examples of the adhesive base resin mainly used in this field include acrylic resins, rubbers, urethane resins, silicone resins or EVA (Ethylene Vinyl Acetate) resins. In one aspect of the present invention, an acrylic resin having excellent optical properties such as transparency and excellent resistance to oxidation, yellowing, and the like can be used as the adhesive base resin.

When using an acrylic resin in the present invention, the weight average molecular weight of the resin may be 500,000 to 1.5 million, preferably 800,000 to 1.3 million. If the weight average molecular weight is less than 500,000, the durability of the cured product may be excessively reduced, or contamination due to transfer may be caused due to the decrease in cohesion. In addition, when the weight average molecular weight exceeds 1.5 million, the wettability of the cured product may be lowered, or there may be a possibility of lifting or peeling due to the external environment.

On the other hand, the glass transition temperature of the acrylic resin in the present invention may be in the range of -70 ℃ to 10 ℃. If the glass transition temperature is lower than -70 ° C, the elasticity of the cured product may be excessively lowered. If the glass transition temperature is higher than 10 ° C, the wettability to the adherend and the stability over time of the peeling force may decrease.

When the acrylic resin is used as the adhesive base resin in the present invention, the acrylic resin may be, for example, a polymer of a monomer mixture including a (meth) acrylic acid ester monomer and a crosslinkable monomer.

The kind of (meth) acrylic acid ester monomer that can be used in the present invention is not particularly limited, and for example, alkyl (meth) acrylate can be used. In this case, when the alkyl group contained in the monomer is too long, the cohesive force of the cured product may be lowered and the glass transition temperature and the adhesiveness may become difficult to control. Therefore, the alkyl group having 1 to 14 carbon atoms, preferably 2 to 8 carbon atoms Alkyl (meth) acrylates can be used. Examples of such monomers include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, t-butyl ( Meth) acrylate, sec-butyl (meth) acrylate, pentyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-ethylbutyl (meth) acrylate, n-octyl (meth) acrylate, Isooctyl (meth) acrylate, isobonyl (meth) acrylate, isononyl (meth) acrylate, etc. are mentioned, In the present invention, a mixture of one or more of the above can be used.

In the present invention, it is particularly preferable to include a hard monomer and a soft monomer as appropriately blended in the monomer mixture. The term "hard monomer" used in the present invention means a hard type monomer having a glass transition temperature of greater than about 25 ° C when a homopolymer is prepared using the monomer. In addition, "soft monomer" means a soft type monomer having a glass transition temperature of about 25 ° C. or less when a homopolymer is prepared using the monomer. Examples of such soft monomers include ethylhexyl (meth) acrylate or butyl (meth) acrylate, and specific examples of hard monomers include methyl (meth) acrylate, ethyl (meth) acrylate or isobornyl. (Meth) acrylate, and the like, but is not limited thereto. Thus, when an acrylic resin is manufactured by combining a flexible and hard monomer suitably, the hardened | cured material of a resin composition can be made to have the outstanding adhesive characteristic and durability. In particular, when the content of the hard monomer is properly controlled in the present invention, it is possible to improve the coating property of the coating solution in the pressure-sensitive adhesive manufacturing process.

Meanwhile, in the present invention, the (meth) acrylic acid ester monomer may be included in an amount of 80 parts by weight to 99.9 parts by weight, preferably 90 parts by weight to 99.9 parts by weight in the monomer mixture. If the content is less than 80 parts by weight, there is a fear that the initial adhesive strength is lowered, if it exceeds 99.9 parts by weight, there is a fear that a problem in durability due to the cohesive force is lowered.

In addition, in the present invention, as the (meth) acrylic acid ester monomer, when the soft monomer and the hard monomer are used in combination, the soft monomer is included in the monomer mixture in an amount of 40 parts by weight to 79.9 parts by weight, and the hard monomer is 20 parts by weight. It may be included in an amount of from 40 to 40 parts by weight. However, the content of the hard and soft monomer is only one aspect of the present invention, in the present invention, the content can be appropriately changed in consideration of the adhesive properties, durability, or coating properties of the desired cured product.

The crosslinkable monomer included in the monomer mixture in the present invention is a monomer that can give a polymer a crosslinkable functional group that can react with the multifunctional crosslinking agent to be described later, to control the durability, hardness, cohesion and cohesion of the cured product, etc. it means.

Examples of the crosslinkable monomer that can be used in the present invention include a hydroxy group-containing monomer, a carboxyl group-containing monomer, a nitrogen-containing monomer, and the like, and one kind or a mixture of two or more kinds thereof can be used. Examples of the hydroxy group-containing monomers above include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) Acrylate, 8-hydroxyoctyl (meth) acrylate, 2-hydroxyethylene glycol (meth) acrylate, 2-hydroxypropylene glycol (meth) acrylate, and the like; Examples of the carboxyl group-containing monomers include acrylic acid, methacrylic acid, 2- (meth) acryloyloxy acetic acid, 3- (meth) acryloyloxy propyl acid, 4- (meth) acryloyloxy butyl acid, and acrylic acid double. Sieve, itaconic acid, maleic acid or maleic anhydride; Examples of nitrogen-containing monomers include 2-isocyanatoethyl (meth) acrylate, 3-isocyanatopropyl (meth) acrylate, 4-isocyanatobutyl (meth) acrylate, (meth) acrylamide , N-vinyl pyrrolidone or N-vinyl caprolactam, and the like, but are not limited thereto.

In the present invention, such a crosslinkable monomer is preferably included in an amount of 0.1 parts by weight to 10 parts by weight in the monomer mixture. If the content of the crosslinkable monomer is less than 0.1 part by weight, the physical properties such as durability and durability of the cured product may deteriorate. If the content of the crosslinkable monomer exceeds 10 parts by weight, surface migration may occur, or peeling may occur due to a decrease in flow characteristics or an increase in cohesion. Or there is a possibility that the lifting occurs.

In the present invention, the monomer mixture may further include a comonomer represented by the following Chemical Formula 1 in view of controlling the glass transition temperature and providing other functionalities.

[Formula 1]

In Formula 1, R ₁ to R ₃ each independently represent hydrogen or alkyl, and R ₄ is cyano; Phenyl unsubstituted or substituted with alkyl; Acetyloxy; Or COR ₅ , wherein R ₅ represents amino or glycidyloxy unsubstituted or substituted with alkyl or alkoxyalkyl.

Alkyl or alkoxy in the definition of R ₁ to R _{5 in} the above formula means alkyl or alkoxy having 1 to 8 carbon atoms, preferably methyl, ethyl, methoxy, ethoxy, propoxy or butoxy.

Specific examples of the monomer of general formula (1) which can be used in the present invention include nitrogen such as (meth) acrylonitrile, (meth) acrylamide, N-methyl (meth) acrylamide or N-butoxy methyl (meth) acrylamide Monomers; Styrene-based monomers such as styrene or methyl styrene; Glycidyl (meth) acrylate; Or a carboxylic acid vinyl ester such as vinyl acetate, or the like, or a heterogeneous compound, but is not limited thereto. When such a monomer is included in the monomer mixture of the present invention, it is preferably 20 parts by weight or less. When the content is more than 20 parts by weight, there is a fear that the flexibility and / or peeling force is lowered.

The method for producing the acrylic resin containing each of the above-mentioned components is not particularly limited, and for example, it can be produced through a general polymerization method such as solution polymerization, photopolymerization, bulk polymerization, suspension polymerization or emulsion polymerization. In this invention, acrylic resin can be manufactured especially using solution polymerization method. In this case, the solution polymerization is preferably carried out at a polymerization temperature of 50 ℃ to 140 ℃ by mixing the initiator in a state where each monomer is uniformly mixed. Initiators that can be used at this time include azo polymerization initiators such as azobisisobutyronitrile or azobiscyclohexane carbonitrile; Or a mixture of one or more kinds of common initiators such as peroxides such as benzoyl peroxide or acetyl peroxide.

The resin composition of this invention contains an organic salt with the base resin mentioned above. In the present invention, the organic salt is an electrode layer (ex. ITO) included in the touch screen under harsh conditions (heat and / or moisture resistance), while maintaining or improving physical properties such as adhesion, step absorption, durability and cutting properties of the cured product. It serves to suppress the resistance change of the electrode).

The type of organic salt that can be used in the present invention is not particularly limited as long as it can perform the above-described action, and for example, a salt containing an onium cation can be used. As used herein, the term "onium cation" refers to an ion that is charged in an amount that retains at least some charge localized on one or more nitrogen, phosphorus, or sulfur atoms, such as nitrogen onium cations, phosphorus onium cations, or sulfur onium cations. it means.

In the present invention, the onium cation may be cyclic or acyclic, wherein the cyclic cation may have an aromatic or non-aromatic structure. In addition, the onium cation may be substituted by one or more substituents as necessary, and examples of the substituents include halogen, alkyl, or aryl. In addition, the acyclic cation may have one or more, preferably four or more substituents, where the substituents may be cyclic or acyclic, aromatic or non-aromatic substituents.

In the present invention, in particular, nitrogen onium cations may be used among the onium cations, preferably ammonium cations, and more preferably quaternary ammonium cations. . As described above, the ammonium cation is a hydrophobic additive, and has excellent compatibility with a base resin such as an acrylic resin, and has low reactivity with moisture.

The kind of ammonium cation that can be used in the present invention is not particularly limited, and for example, various acyclic ammonium cations or aromatic ammonium cations can be used.

In this case, the acyclic ammonium cation may be, for example, a cation represented by the following formula (2).

[Formula 2]

R ₆ to R ₉ in Formula 2 are each independently hydrogen; Substituted or unsubstituted alkyl; Substituted or unsubstituted alkoxy; Substituted or unsubstituted alkenyl; Substituted or unsubstituted alkynyl; Substituted or unsubstituted aryl; Or substituted or unsubstituted heteroaryl.

In the definition of Formula 2, alkyl or alkoxy may represent alkyl or alkoxy having 1 to 12 carbon atoms, preferably 1 to 8 carbon atoms, and alkenyl or alkynyl may have 2 to 12 carbon atoms, preferably 2 to 8 carbon atoms. May represent kenyl or alkynyl.

In addition, in the definition of Formula 2, aryl is a substituent derived from an aromatic compound, may represent a phenyl, biphenyl, naphthyl or anthracenyl ring system and the like, heteroaryl is one or more hetero selected from O, N and S 5 to 12 membered heterocycle or aryl ring containing an atom, specifically furyl, pyrrolyl, pyrrolidinyl, thienyl, pyridinyl, piperidyl, indolyl, quinolyl, thiazole, benz Thiazole, triazole and the like.

In addition, in the definition of Chemical Formula 2, alkyl, alkoxy, alkenyl, alkynyl, aryl or heteroaryl may be substituted by one or more substituents, and examples of the substituents include hydroxy group, halogen or 1 to 12 carbon atoms, preferably Preferably 1 to 8, more preferably 1 to 4 alkyl or alkoxy and the like, but is not limited thereto.

In the present invention, it is preferable to use a quaternary ammonium cation among the cations of Formula 2, and in particular, R ₁ to R ₄ are each independently substituted or unsubstituted alkyl having 1 to 12 carbon atoms, preferably 1 to 8 carbon atoms. Preference is given to using phosphorus cations.

Acyclic ammonium cations usable in the present invention are also preferably N-ethyl-N, N-dimethyl-N- (2-methoxyethyl) ammonium, N, N-diethyl-N-methyl-N -(2-methoxyethyl) ammonium, N-ethyl-N, N-dimethyl-N-propylammonium, N-methyl-N, N, N-trioctylammonium, N, N, N-trimethyl-N-propyl Ammonium, tetrabutylammonium, tetramethylammonium, tetrahexylammonium and N-methyl-N, N, N-tributylammonium.

Meanwhile, examples of the aromatic ammonium cation that can be used in the present invention include pyridinium, pyridazinium, pyrimidinium, pyrazinium, imidazolium, and pyra. It may be one kind or two or more kinds of zollium (pyrazolium), thiazolium (thiazolium), oxazolium or triazolium (triazolium). In the present invention, the aromatic ammonium cation may be substituted by one or more substituents, and examples of the substituents include halogen, alkyl, alkoxy, alkenyl, alkynyl, aryl or heteroaryl, but are not limited thereto. It doesn't happen. In this case, specific definitions of the alkyl, alkoxy, alkenyl, alkynyl, aryl and heteroaryl are the same as in Chemical Formula 2.

On the other hand, in the present invention, the aromatic ammonium cation may be, for example, a compound represented by the following formula (3).

(3)

In Formula 3, R ₁₀ to R ₁₅ are each independently hydrogen; Substituted or unsubstituted alkyl; Substituted or unsubstituted alkoxy; Substituted or unsubstituted alkenyl; Substituted or unsubstituted alkynyl; Substituted or unsubstituted aryl; Or substituted or unsubstituted heteroaryl.

Alkyl, alkoxy, alkenyl, alkynyl, aryl and heteroaryl in Formula 3, and their definitions are the same as in Formula 2.

In the compound of Formula 3, it is particularly preferable that R ₁₁ to R ₁₅ are each independently hydrogen or alkyl, and R ₁₀ is alkyl.

On the other hand, the kind of anion that may be included in the organic salt in the present invention is not particularly limited. For example, in the present invention, as the anion, a benzoate anion, a borate anion, a sulfonate anion, a sulfonyl meted anion, a sulfonimide anion, an acetate anion, a carbonate anion, and a carbonyl metted anion And at least one selected from the group consisting of carbonylimide-based anions, perchlorate anions, phosphate-based anions, and halogen anions.

Specific examples of the borate anion include tetraphenylborate or tetrafluoroborate, and specific examples of the sulfonate anion include sulfonate, trifluoromethylsulfonate, toluenesulfonate, and the like. Examples of the sulfonylmethide specific anion include tristrifluoromethanesulfonylmethide, and the like, and specific examples of the sulfonimide anion include bistrifluoromethanesulfonimide, bisperfluorobutanesulfonimide, or the like. Bispentafluoroethanesulfonimide, and the like, and specific examples of the acetate-based anions include 2-hydroxy acetate, acetate or trifluoroacetate, and the like, and specific examples of the carbonylmethed anion Fluoromethanecarbonylmethide, and the like, and carbonyl Specific examples of the mid-based anions include bisperfluorobutanecarbonyl imide or bispentafluoroethanecarbonylimide, and the like, and specific examples of the phosphate-based anions include trispentafluoro ethyltrifluorophosphate or hexa. Fluorophosphate, and the like, and examples of the halogen anion include, but are not limited to, bromide, iodide, chloride or fluoride.

Further, more preferred examples of the ammonium salt that can be used in the present invention include N-ethyl-N, N-dimethyl-N- (2-methoxyethyl) ammonium bistrifluoromethanesulfonimide, N, N-di Ethyl-N-methyl-N- (2-methoxyethyl) ammonium bistrifluoromethanesulfonimide, N-ethyl-N, N-dimethyl-N-propylammonium bistrifluoromethanesulfonimide, N- Methyl-N, N, N-trioctylammonium bistrifluoromethanesulfonimide, N-methyl-N, N, N-trioctylammonium bispentafluoroethanesulfonimide, N-methyl-N, N, N-trioctylammonium tristrifluoromethanecarbonylmethide, N, N, N-trimethyl-N-propylammonium bistrifluoromethanesulfonimide, tetrabutylammonium bistrifluoromethanesulfonimide, tetramethylammonium Bistrifluoromethanesulfonimide, tetrahexylammonium bistrifluoromethanesulfonimide, N-methyl-N, N, N-tributylammonium bistri Fluoromethanesulfonimide, tetrabutylammonium trispentafluoroethyltrifluorophosphate, tetramethylammonium trispentafluoroethyltrifluorophosphate, N-methyl-N, N, N-trioctylammonium trifluoroacetate , N-methyl-N, N, N-trioctylammonium trifluoromethylsulfonate, N-methyl-N, N, N-trioctylammonium bistrifluoromethanesulfonimide, N-methyl-N, N , N-trioctylammonium hexafluorophosphate, NC _1-8 alkyl-4-C _1-4 alkyl-pyridinium bistrifluoromethanesulfonimide, NC _1-8 alkyl-4-C _1-4 alkyl- One or more selected from the group consisting of pyridinium hexafluorophosphate, NC _1-8 alkyl alkyl-pyridinium bistrifluoromethanesulfonimide, or NC _1-8 alkyl alkyl-pyridinium hexafluorophosphate, It is not limited to this. In the above, "C _nm alkyl" means alkyl having n to m.

The organic salt as described above in the resin composition of the present invention is 0.1 parts by weight to 10 parts by weight, preferably 0.1 parts by weight to 5 parts by weight, more preferably 0.1 parts by weight to 3 parts by weight based on 100 parts by weight of the adhesive base resin. May be included in the amount. In the present invention, if the content of the organic salt is less than 0.1 part by weight, the effect due to the addition of the organic salt may be insignificant. If it exceeds 10 parts by weight, physical properties such as durability or transparency of the cured product may be lowered.

The resin composition for a touch screen of the present invention may further include a hydrophobic low molecular weight having a weight average molecular weight of 500 to 100,000 in an amount of 0.1 parts by weight to 10 parts by weight with respect to 100 parts by weight of the base resin. The term "hydrophobic low molecular weight" used in the present invention means, for example, a polymer of a hydrophobic monomer as described later. The addition of such a component can further enhance the bulk modulus of the cured product of the composition of the present invention, increase the wettability to the substrate and impart moisture resistance.

In the present invention, the hydrophobic low molecular weight may have a weight average molecular weight in the range of 500 to 100,000, preferably 4,000 to 90,000, more preferably 9,000 to 50,000. In the present invention, if the weight average molecular weight of the low molecular weight is less than 500, the effect of increasing moisture resistance and wettability due to the addition of the low molecular weight may be insignificant, and if it exceeds 100,000, there may be a problem of compatibility with the base resin or the like. have.

On the other hand, in the present invention, it is also preferable that the glass transition temperature of the hydrophobic low molecular weight body is -80 ° C to -20 ° C. In the present invention, when the glass transition temperature of the low molecular weight body is less than -80 ° C, the cured product of the resin composition becomes too soft, and at the time of bleeding to the adhered surface even at room temperature, or during a punching operation or the like. The spillage phenomenon may occur, and workability may fall, and when it exceeds -20 degreeC, hardened | cured material may become hard too much and wettability to a to-be-adhered body may fall.

In the present invention, such hydrophobic low molecular weight may be, for example, a polymer of a hydrophobic monomer or a monomer mixture containing the same. Typically the hydrophobicity or hydrophilicity of a monomer is associated with the polarity of that monomer. For example, when a monomer has high polarity, it has high affinity with polar solvents, such as water and alcohol, and is classified as a hydrophilic monomer. On the contrary, when the monomer exhibits nonpolarity, the affinity with the hydrophilic solvent may be greatly reduced, and thus may be classified as a hydrophobic monomer. Typically, when a monomer contains atoms such as oxygen or nitrogen, a non-uniform distribution of electrons present in the monomer is induced, and such monomers are classified as hydrophilic monomers. From this point of view, in the case of the (meth) acrylic acid ester monomer, an ester bond or a carbon carbon double bond generally has a polarity, thereby showing hydrophilicity. However, if the backbone included in the (meth) acrylic acid ester monomer is properly controlled, the inherent polarity of the monomer can be effectively canceled, and thus the monomer can act as a non-polar hydrophobic monomer as a whole. have. Accordingly, in the present invention, the hydrophobic monomer constituting the hydrophobic low molecular weight may be an alkyl (meth) acrylate having an alkyl group having 4 to 20 carbon atoms, preferably 4 to 16 carbon atoms, more preferably 4 to 12 carbon atoms. have. Such monomers are non-polar due to the characteristics of the alkyl group constituting the skeleton, and exhibit high resistance to polar substances (ex. Moisture). Accordingly, when the polymer (hydrophobic low molecular weight) of such a monomer is blended in the resin composition, the resin composition exhibits excellent moisture resistance. In addition, the hydrophobic monomers exhibit excellent resistance to UV or thermal deterioration, and thus the durability of the resin composition of the present invention can be significantly improved. Specific examples of such hydrophobic monomers that can be used in the present invention include octyl (meth) acrylate, 4-methyl-2-pentyl (meth) acrylate, 2-methylbutyl (meth) acrylate, isoamyl (meth ) Acrylate, sec-butyl (meth) acrylate, n-butyl (meth) acrylate, ethylhexyl (meth) acrylate, decyl (meth) acrylate, isononyl (meth) acrylate, stearyl (meth) And at least one selected from the group consisting of acrylate, lauryl (meth) acrylate, isotridecyl (meth) acrylate and isobornyl (meth) acrylate, preferably ethylhexyl (meth) acrylic One or more selected from the group consisting of late and butyl (meth) acrylate can be used, but is not limited thereto. In the present invention, the monomer mixture constituting the hydrophobic low molecular weight, in addition to the monomers described above, methyl (meth) acrylate, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, One or more monomers selected from the group consisting of β-carboxyethyl (meth) acrylate and dicyclopentenyl (meth) acrylate may be appropriately further included.

The low molecular weight of the present invention is particularly preferably a polymer of the aforementioned hydrophobic monomer or monomer mixture consisting of hydrophobic monomers. That is, it is preferable that the low molecular weight body of this invention consists only of the hydrophobic monomer mentioned above, and does not contain the other monomer which has hydrophilic other than that. Since the low molecular weight is composed of hydrophobic monomers only, the effect due to the addition of the low molecular weight can be more maximized. When the low molecular weight of the present invention consists only of a hydrophobic monomer, the low molecular weight may be a homopolymer or copolymer of any one of the aforementioned hydrophobic monomers.

In the present invention, the method for producing the low molecular weight using the hydrophobic monomer is not particularly limited, and for example, the above-described method for producing the adhesive base resin may be applied as it is or as appropriately changed.

On the other hand, the hydrophobic low molecular weight in the present invention may be included in an amount of 0.1 to 10 parts by weight, preferably 1 to 10 parts by weight with respect to 100 parts by weight of the adhesive base resin. If the content of the low molecular weight is less than 0.1 part by weight, the durability or the moisture resistance improvement effect of the cured product may be insignificant. If it exceeds 10 parts by weight, the durability of the cured product may be lowered.

The resin composition of the present invention may further contain 0.01 to 5 parts by weight, preferably 0.01 to 3 parts by weight of a multifunctional crosslinking agent, based on 100 parts by weight of the adhesive base resin. The polyfunctional crosslinking agent may adjust the adhesive properties of the cured product according to the amount of use thereof, and in particular, may react with the crosslinkable functional group included in the adhesive base resin to improve the cohesion of the cured product.

The kind of the multifunctional crosslinking agent that can be used in the present invention is not particularly limited, and for example, a general crosslinking agent such as an isocyanate compound, an epoxy compound, an aziridine compound and a metal chelate compound can be used. Examples of the isocyanate compound include tolylene diisocyanate, xylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isoborone diisocyanate, tetramethylxylene diisocyanate, naphthalene diisocyanate and any one of the above polyols ( ex. trimethylol propane); Examples of epoxy compounds include ethylene glycol diglycidyl ether, triglycidyl ether, trimethylolpropane triglycidyl ether, N, N, N ', N'-tetraglycidyl ethylenediamine and glycerin diglycidyl ether. One or more selected from the group consisting of; Examples of aziridine compounds include N, N'-toluene-2,4-bis (1-aziridinecarboxamide), N, N'-diphenylmethane-4,4'-bis (1-aziridinecarboxes) Mid), triethylene melamine, bisisoprotaloyl-1- (2-methylaziridine), and tri-1-aziridinylphosphine oxide. In addition, examples of the metal chelate-based compound may be a compound in which a polyvalent metal such as aluminum, iron, zinc, tin, titanium, antimony, magnesium, and / or vanadium is coordinated with acetyl acetone, ethyl acetoacetate, or the like. It is not limited.

In the resin composition of the present invention, the multifunctional crosslinking agent may be included in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the adhesive base resin. If the content of the crosslinking agent is less than 0.01 part by weight, the crosslinking reaction may not proceed well, and the cohesive force of the cured product may be lowered. There is a fear that the reliability is lowered.

The resin composition of the present invention may also contain 0.005 parts by weight to 5 parts by weight of a silane coupling agent based on 100 parts by weight of the adhesive base resin in addition to the above-described components. Such a coupling agent improves adhesion and adhesion stability between the cured product and the adherend, thereby improving heat resistance and moisture resistance, and also improves adhesion reliability when the cured product is left for a long time under high temperature and / or high humidity. . The kind of silane coupling agent that can be used in the present invention is not particularly limited, and for example, γ-glycidoxypropyltrimethoxy silane, γ-glycidoxypropylmethyldiethoxy silane, γ-glycidoxypropyl Triethoxy silane, 3-mercaptopropyltrimethoxy silane, vinyltrimethoxy silane, vinyltriethoxy silane, γ-methacryloxypropyltrimethoxy silane, γ-methacryloxypropyltriethoxy silane, γ One kind or a mixture of two or more kinds of -aminopropyltrimethoxy silane, γ-aminopropyltriethoxy silane, 3-isocyanatepropyltriethoxy silane or γ-acetoacetate tripropyltrimethoxy silane can be used. Such a silane coupling agent is preferably included in the resin composition in an amount of 0.005 parts by weight to 5 parts by weight based on 100 parts by weight of the adhesive base resin. If the content is less than 0.005 parts by weight, the effect of increasing the adhesion may be insignificant. If the content is more than 5 parts by weight, the durability may be lowered, such as bubble or peeling phenomenon.

The resin composition of the present invention may further include 1 part by weight to 100 parts by weight of a tackifying resin with respect to 100 parts by weight of the adhesive base resin from the viewpoint of adjusting the adhesion performance. The kind of such tackifying resin is not specifically limited, For example, (hydrogenated) hydrocarbon type resin, (hydrogenated) rosin resin, (hydrogenated) rosin ester resin, (hydrogenated) terpene resin, (hydrogenated) terpene phenol resin, One kind or a mixture of two or more kinds of a polymeric rosin resin or a polymeric rosin ester resin can be used. If the content of the tackifying resin is less than 1 part by weight, the effect of addition may be insignificant. If it exceeds 100 parts by weight, the compatibility and / or cohesion improvement effect may be lowered.

The resin composition of the present invention may also contain at least one additive selected from the group consisting of epoxy resins, crosslinkers, ultraviolet stabilizers, antioxidants, colorants, reinforcing agents, fillers, antifoaming agents, surfactants, and plasticizers, in a range that does not affect the effects of the invention. It may further include a.

The resin composition of the present invention comprising each of the above components may be present in a coating liquid state dispersed in a suitable solvent, in which case the solid content concentration may be about 10% to 50%. If the solid content concentration is less than 10%, there is a fear that the production efficiency of the pressure-sensitive adhesive film to be described later is lowered, if it exceeds 50%, the viscosity of the coating liquid is excessively increased, there is a fear that the workability.

In addition, the viscosity of the coating solution in the above may be about 1,800 cps to 3,300 cps, by controlling the viscosity in the above-described range, it is possible to ensure appropriate workability.

However, the range of the solid content and viscosity is only one aspect of the present invention, and in the present invention, the above conditions can be appropriately changed in consideration of the use to which the resin composition is applied.

The present invention also provides a first base film or a first release film; An adhesive layer formed on the first base film or the first release film and containing the resin composition according to the present invention described above; And

It relates to a pressure-sensitive adhesive film for a touch screen comprising a second base film or a second release film formed on the adhesive layer.

In the pressure-sensitive adhesive layer of the pressure-sensitive adhesive film of the present invention, the resin composition of the present invention may be contained, for example, in the form of a dried product, a semi-cured product or a cured product.

1 is a view showing a cross-sectional view of an adhesive film according to an aspect of the present invention.

As shown in FIG. 1, the adhesive film 10 of this invention is the 1st base film or the release film 12a (henceforth a "first film" may be called.); Adhesive layer 11; And the second base film or the release film 12b (hereinafter, sometimes referred to as "second film") may have a structure sequentially formed. However, the adhesive film shown in the drawing is only one aspect of the present invention. The adhesive film of the present invention may have a form of a single layer formed only of the cured product of the composition of the present invention, for example, without a supporting substrate, and in some cases, an adhesive layer is formed on both sides of one base film or a release film. Thus, it may be configured in the form of a double-sided adhesive film.

The specific kind of the first or second films 12a and 12b used in the present invention is not particularly limited, and for example, a general plastic film in this field can be used. In the present invention, for example, as the base film or the release film, polyethylene terephthalate film, polytetrafluoroethylene film, polyethylene film, polypropylene film, polybutene film, polybutadiene film, vinyl chloride copolymer film, poly Urethane films, ethylene-vinyl acetate films, ethylene-propylene copolymer films, ethylene-ethyl acrylate copolymer films, ethylene-methyl acrylate copolymer films, polyimide films and the like can be used. In addition, an appropriate release treatment may be performed on one side or both sides of the base film or the release film of the present invention. Alkyd-based, silicone-based, fluorine-based, unsaturated ester-based, polyolefin-based, wax-based, etc. may be used as an example of the release agent used in the release treatment of the base film, and among these, it is preferable to use an alkyd-based, silicone-based, or fluorine-based release agent in terms of heat resistance. Preferred, but not limited to.

In the present invention, the thickness of the first or second film as described above is not particularly limited and may be appropriately selected depending on the application to be applied. For example, in the present invention, the thickness of the first or second film may be about 10 μm to 100 μm, preferably about 20 μm to 90 μm, and more preferably about 30 μm to 60 μm.

In the pressure-sensitive adhesive film of the present invention, the thickness of the pressure-sensitive adhesive layer 11 formed between the first and second films 12a and 12b is also not particularly limited, and may be appropriately selected in consideration of the application of the film. The pressure-sensitive adhesive layer included in the pressure-sensitive adhesive film of the present invention may be, for example, about 5 μm to 500 μm, preferably about 10 μm to 400 μm, and more preferably about 20 μm to 350 μm.

In this invention, the method of manufacturing such an adhesive film is not specifically limited. In the present invention, for example, after the resin composition (coating liquid) according to the present invention described above is coated on a base film or a release film, and the adhesive layer is manufactured through a drying, curing and / or aging process, the prepared adhesive The adhesive film may be prepared by pressing an additional base film or a release film on the layer.

Specifically, in the present invention, the above-described resin composition according to the present invention is dissolved or dispersed in an appropriate solvent to prepare a coating liquid, and the coating is coated on a substrate or a release film. In this process, the stirring conditions for preparing the coating liquid may be controlled to about 30 minutes or more at about 1,000 RPM to 3,000 RPM, and may be appropriately controlled within the above-described ranges such as solid content and viscosity of the coating liquid.

In addition, the kind of solvent for manufacture of a coating liquid in this invention is not specifically limited. However, when the drying time of the solvent is too long or when drying at a high temperature is required, problems may occur in terms of workability or durability of the adhesive film, and it is preferable to use a solvent having a volatilization temperature of 100 ° C. or less. In the present invention, in consideration of film formability, a small amount of a solvent having a volatilization temperature of the above range or more can be mixed and used. Examples of the solvent that can be used in the present invention include methyl ethyl ketone (MEK), acetone, toluene, dimethylformamide (DMF), methyl cellosolve (MCS), tetrahydrofuran (THF) or N-methylpyrrolidone (NMP) and the like or a mixture of two or more thereof may be mentioned, but is not limited thereto.

In the present invention, a method of applying the coating solution prepared as described above to the base film or the release film is not particularly limited, and examples thereof include a knife coat, a roll coat, a spray coat, a gravure coat, a curtain coat, a comma coat, or a lip coat. The same known method can be used without limitation.

After carrying out the preparation and coating process of the coating liquid as described above, the drying, curing and / or aging process for the coating liquid is carried out. At this time, the conditions such as drying may be appropriately selected in consideration of the composition, etc. of the coating liquid used. In the present invention, for example, the drying or curing process may be carried out for 3 minutes or more at a temperature of 110 ℃ or more, and the aging process may be performed for 24 to 72 hours in the range of 50 ℃ to 60 ℃, It is not limited to this.

After forming the adhesive layer through such a process, an additional base film or a release film (second film) is pressed onto the adhesive layer.

In the present invention, the pressing process may be performed through a hot roll lamination or a press process, and may be performed by a hot roll lamination method in view of the possibility and efficiency of the continuous process. In addition, the pressing process may be performed at a pressure of about 0.1 kgf / cm ² to 10 kgf / cm ² at a temperature of about 10 ° C. to 100 ° C., but is not limited thereto.

The present invention also provides a substrate comprising: a first substrate having a first electrode layer attached to one surface by an adhesive layer; And a second substrate attached to one surface by an adhesive layer, and a second substrate spaced apart from the first substrate so that the second electrode layer faces the first electrode layer.

The adhesive layer which adheres the said 1st or 2nd electrode layer is related with the touchscreen containing the hardened | cured material of the resin composition which concerns on this invention.

In the touch screen of the present invention, as long as the resin composition according to the present invention is used for attachment of the electrode layer, other configurations are not particularly limited, and general configurations in this field may be employed without limitation.

2 is a schematic diagram showing an example of the touch screen 20 to which the resin composition of the present invention is applied. As shown in FIG. 2, the touch screen 20 typically includes a case 29 for accommodating internal parts, and inside the case, an electrode layer (1) is formed on one surface by adhesive layers 22a and 22b according to the present invention. The first and second substrates 21 and 26, to which 23a and 23b are attached, are spaced apart from each other and included. At this time, the first and second substrates 21 and 26 are disposed such that the electrode layers 23a and 23b included therebetween face each other, and the gap therebetween is spaced between the spacers 24a and 24b (ex. Sheet spacer 25, and a dot spacer 25 may be formed on the electrode layer 23b of the lower substrate 26. In this case, the first substrate 21 may be, for example, a deco film composed of a plastic film such as polyethylene terephthalate, and the second substrate 26 may be made of poly for reinforcing rigidity of the electrode layer. Carbonate sheet or glass sheet. On the other hand, the electrode layer applied in the present invention (23a, 23b), for example, an electrode such as ITO is deposited on one surface of various polymer films (ex. Polyethylene terephthalate (PET) film or polycarbonate (PC) film) It may be a transparent conductive film. In addition, the touch screen 20 of the present invention is a liquid crystal display provided in the adhesive layer or adhesive layer (27a, 27b) and the lower part for accommodating the reinforcing substrate (second substrate) 26 in the case 29 as described above Tooth (LCD) 28.

As described above, the resin composition according to the present invention can effectively suppress the resistance change of the electrode layer included in the touch screen under severe conditions while having excellent adhesiveness, step absorption, durability and cutting property, and thus In the touch screen as described above, it can be effectively applied for the purpose of attaching the electrode layer to various substrates.

Hereinafter, the present invention will be described in more detail through examples according to the present invention and comparative examples according to the present invention, but the scope of the present invention is not limited to the following examples.

Preparation Example 1 Preparation of Resin Composition A

A monomer comprising 65 parts by weight of ethylhexyl acrylate (EHA), 30 parts by weight of methyl acrylate (MA), and 5 parts by weight of acrylic acid (AA) in a 1L reactor equipped with a refrigeration device for reflux of nitrogen gas and for easy temperature control. After the mixture was added, 100 parts by weight of ethyl acetate (EAc) was added as a solvent. Subsequently, the nitrogen gas was purged for about 1 hour for oxygen removal, and maintained at 62 ° C., the mixture was homogenized, and then azobisisobutyronitrile diluted to 50% in ethyl acetate with a reaction initiator ( AIBN) 0.03 parts by weight was added. Subsequently, the mixture was reacted for about 8 hours to produce a weight average molecular weight of 600,000 600,000 acrylic resin. Subsequently, 0.07 parts by weight of N, N'-hexamethylene-1,6-bis (1-aziridinecarboxamide) (HDU), which is an aziridine-based crosslinking agent, is mixed with 100 parts by weight of the acrylic resin, and diluted to an appropriate viscosity. To prepare a resin composition having a solid content concentration of 30%.

Preparation Example 2 Preparation of Resin Composition B

Using a monomer mixture comprising 65 parts by weight of ethylhexyl acrylate (EHA), 30 parts by weight of methyl acrylate (MA) and 5 parts by weight of acrylic acid (AA), an acrylic resin having a weight average molecular weight of 1 million was prepared, and the resin 0.07 parts by weight of N, N'-hexamethylene-1,6-bis (1-aziridinecarboxamide) (HDU), which is an aziridine-based crosslinking agent, was mixed to 100 parts by weight, so that the solid content concentration was 20%. Except for producing a resin composition in the same manner as in Preparation Example 1.

Example 1.

To 100 parts by weight of solids of the resin composition A prepared in Preparation Example 1, 0.5 part by weight of N-hexyl pyridinium bistrifluoromethanesulfonimide was prepared as an organic salt to prepare a resin composition (coating solution) according to the present invention. It was. Subsequently, the prepared coating solution was coated to have a thickness of 50 μm and to have a thickness of 50 μm after drying on the polyethylene terephthalate subjected to the release treatment. Thereafter, the mixture was dried at a temperature of about 110 ° C. for about 3 minutes or more, and aged at an appropriate condition to form an adhesive layer having a thickness of 50 μm. Thereafter, a polyethylene terephthalate film having a thickness of 50 μm and a mold release treatment was pressed on the formed adhesive layer, thereby preparing an adhesive film.

Examples 2-5 and Comparative Examples 1 and 2

As shown in Table 1 below, an adhesive film was prepared in the same manner as in Example 1 except for adding or not adding an organic salt to the resin composition prepared in Preparation Example 1 or 2.

TABLE 1

Example Comparative example One 2 3 4 5 One 2 Resin composition A A A B B A B Organic salt S1 0.5 0.1 - 0.5 - - - S2 - - 0.5 - 0.5 - - S1: N-hexyl pyridinium bistrifluoromethanesulfonimide
S2: N-hexyl-4-methyl pyridinium bistrifluoromethanesulfonimide

The physical properties of the pressure-sensitive adhesive films prepared in Examples and Comparative Examples were measured by the methods shown below.

1. Measurement of ITO Resistance Change Rate

The pressure-sensitive adhesive layers prepared in Examples and Comparative Examples were attached to ITO PET, and electrodes were formed using silver paste on both sides to prepare samples. Thereafter, the initial resistance (P1) was measured on the prepared sample, and the sample was left for 240 hours at a temperature of 60 ° C and 90% R.H., and then the resistance (P2) was measured. At this time, the resistance was measured using a Checkman portable resistance, voltage, and current measuring instrument (made by Taekwang Electronics). Then, the resistance change rate (ΔR) was measured by substituting the resistance value measured under each of the above conditions in the following general formula (1).

[Formula 1]

2. Peel force measurement

A PET film (backing film) having a thickness of 50 μm was used to attach the adhesive layers prepared in Examples and Comparative Examples to a polycarbonate film, and at 30 minutes after the attachment, TA.XT_Plus Texture Analyzer (Stable Micro System) Peeling force was measured using (product).

3. Peel force measurement

After bonding the polycarbonate film and the polyethylene terephthalate film using the pressure-sensitive adhesive layers prepared in Examples and Comparative Examples, the mixture was left for 240 hours at a temperature of 60 ° C. and 90% RH, and then lifted from the adhered surface. The presence or absence of peeling or bubbles was visually observed and evaluated based on the following criteria.

○: no lifting, peeling or bubbles

△: some lifting, peeling or bubbles are generated

X: A lot of lifting, peeling, or air bubbles generate | occur | produce

The measurement results of the physical properties as described above are summarized in Table 2 below.

TABLE 2

Example Comparative example One 2 3 4 5 One 2 Resistance change rate (%) 5 3 6 2 3 25 22 Peel force (g / in) 2501 2362 2653 1986 1899 2894 2157 durability ○ ○ ○ ○ ○ ○ ○

As can be seen from the results of Table 2, both the adhesive film of the Example and Comparative Example showed a good level of peel force and durability, but in the case of the Example, the resistance change of the electrode layer to the minimum range even after being left under severe conditions On the other hand, in the case of the comparative example, the rate of change of resistance was significantly increased, and thus it was not possible to apply to the touch screen. Specifically, in the case of Comparative Examples 1 and 2, the resistance change rate of 25% and 22% was shown, which is much higher than the specification (within 10%) required in actual product application.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows sectional drawing of the adhesive film which concerns on one aspect of this invention.

2 is a view schematically showing an embodiment of a touch screen to which the resin composition of the present invention is applied.

≪ Description of reference numerals &

10: adhesive film 11: adhesive layer

12a, 12b: base film or release film 20: touch screen

21: first substrate 22a, 22b: adhesive layer

23a, 23b: electrode layers 24a, 24b: spacer

25 dot spacer 26 second substrate

27a, 27b: adhesive layer or adhesive layer 28: LCD

29: case

Claims (19)

Adhesive base resins; And a resin composition for a touch screen comprising an organic salt. The resin composition for a touch screen according to claim 1, wherein the adhesive base resin is an acrylic resin. The resin composition of claim 2, wherein the acrylic resin has a weight average molecular weight of 500,000 to 1.50,000, and a glass transition temperature of -70 ° C to 10 ° C. The resin composition for a touch screen according to claim 2, wherein the acrylic resin is a polymer of a monomer mixture containing a (meth) acrylic acid ester monomer and a crosslinkable monomer. The resin composition for a touch screen according to claim 4, wherein the crosslinkable monomer is a hydroxy group-containing monomer, a carboxyl group-containing monomer or a nitrogen-containing monomer. The resin composition of claim 1, wherein the organic salt comprises a nitrogen onium cation. The resin composition for a touch screen according to claim 6, wherein the nitrogen onium cation is an acyclic ammonium cation or an aromatic ammonium cation. The resin composition of claim 7, wherein the acyclic ammonium cation is represented by the following Chemical Formula 2: [Formula 2]

R ₆ to R ₉ in Formula 2 are each independently hydrogen; Substituted or unsubstituted alkyl; Substituted or unsubstituted alkoxy; Substituted or unsubstituted alkenyl; Substituted or unsubstituted alkynyl; Substituted or unsubstituted aryl; Or substituted or unsubstituted heteroaryl. 8. The acyclic ammonium cation according to claim 7, wherein the acyclic ammonium cation is N-ethyl-N, N-dimethyl-N- (2-methoxyethyl) ammonium, N, N-diethyl-N-methyl-N- (2-meth Methoxyethyl) ammonium, N-ethyl-N, N-dimethyl-N-propylammonium, N-methyl-N, N, N-trioctylammonium, N, N, N-trimethyl-N-propylammonium, tetrabutylammonium , Tetramethylammonium, tetrahexyl ammonium and N-methyl-N, N, N-tributylammonium at least one selected from the group consisting of a touch screen resin composition. The resin composition for a touch screen according to claim 7, wherein the aromatic ammonium cation is pyridinium, pyridazinium, pyrimidinium, pyrazinium, imidazolium, pyrazolium, thiazolium, oxazolium or triazolium. The resin composition of claim 7, wherein the aromatic ammonium cation is represented by the following Chemical Formula 3: (3)

In Formula 3, R ₁₀ to R ₁₅ are each independently hydrogen; Substituted or unsubstituted alkyl; Substituted or unsubstituted alkoxy; Substituted or unsubstituted alkenyl; Substituted or unsubstituted alkynyl; Substituted or unsubstituted aryl; Or substituted or unsubstituted heteroaryl. The organic salt according to claim 1, wherein the organic salt is a benzoate anion, a borate anion, a sulfonate anion, a sulfonyl meted anion, a sulfonimide anion, an acetate anion, a carbonate anion, a carbonyl met anion, or a carbo Resin composition for a touch screen comprising at least one selected from the group consisting of a nitrilimide anion, a perchlorate anion, a phosphate anion and a halogen anion. The organic salt of claim 1, wherein the organic salt is N-ethyl-N, N-dimethyl-N- (2-methoxyethyl) ammonium bistrifluoromethanesulfonimide, N, N-diethyl-N-methyl-N -(2-methoxyethyl) ammonium bistrifluoromethanesulfonimide, N-ethyl-N, N-dimethyl-N-propylammonium bistrifluoromethanesulfonimide, N-methyl-N, N, N -Trioctylammonium bistrifluoromethanesulfonimide, N-methyl-N, N, N-trioctylammonium bispentafluoroethanesulfonimide, N-methyl-N, N, N-trioctylammonium tristri Fluoromethanecarbonylmethide, N, N, N-trimethyl-N-propylammonium bistrifluoromethanesulfonimide, tetrabutylammonium bistrifluoromethanesulfonimide, tetramethylammonium bistrifluoromethanesulfone Mead, tetrahexyl ammonium bistrifluoromethanesulfonimide, N-methyl-N, N, N-tributylammonium bistrifluoromethanesulfonimide, tetrabutylammonium Trispentafluoroethyltrifluorophosphate, tetramethylammonium trispentafluoroethyltrifluorophosphate, N-methyl-N, N, N-trioctylammonium trifluoroacetate, N-methyl-N, N, N -Trioctylammonium trifluoromethylsulfonate, N-methyl-N, N, N-trioctylammonium bistrifluoromethanesulfonimide, N-methyl-N, N, N-trioctylammonium hexafluorophosphate , NC _1-8 alkyl-4-C _1-4 alkyl-pyridinium bistrifluoromethanesulfonimide, NC _1-8 alkyl-4-C _1-4 alkyl-pyridinium hexafluorophosphate, NC _{1- 8} Resin composition for a touch screen, which is at least one selected from the group consisting of alkyl alkyl-pyridinium bistrifluoromethanesulfonimide and NC _1-8 alkyl alkyl-pyridinium hexafluorophosphate. The resin composition of claim 1, wherein the organic salt is included in an amount of 0.1 parts by weight to 10 parts by weight with respect to 100 parts by weight of the adhesive base resin. The resin composition for a touch screen according to claim 1, further comprising 0.01 parts by weight to 5 parts by weight of a multifunctional crosslinking agent with respect to 100 parts by weight of the adhesive base resin. The resin composition for a touch screen according to claim 15, wherein the multifunctional crosslinking agent is at least one selected from the group consisting of an isocyanate compound, an epoxy compound, an aziridine compound, and a metal chelate compound. A first base film or a first release film; An adhesion layer formed on the first base film or the first release film and containing the resin composition according to any one of claims 1 to 16; And Adhesive film for a touch screen comprising a second base film or a second release film formed on the adhesive layer. The pressure-sensitive adhesive film of claim 17, wherein the pressure-sensitive adhesive layer has a thickness of 5 μm to 500 μm. A first substrate having a first electrode layer attached to one surface by an adhesive layer; And a second substrate attached to one surface by an adhesive layer, and a second substrate spaced apart from the first substrate so that the second electrode layer faces the first electrode layer. The touch screen, wherein the adhesive layer to which the first or second electrode layer is attached, comprises a cured product of the resin composition according to any one of claims 1 to 16.

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