KR20100121913A - Antistatic pressure-sensitive adhesive film and composition for manufacturing of pressure-sensitive adhesive film - Google Patents

Abstract

PURPOSE: An antistatic pressure-sensitive adhesive film and a composition for manufacturing thereof are provided to secure the time-course stability and the permanent antistatic property of the film. CONSTITUTION: An antistatic pressure-sensitive adhesive film comprises a first release film, an adhesive layer formed by spreading an adhesive composition on the first release film, and a second release film laminated on the adhesive layer. The adhesive composition contains 100 parts of (meth)acrylic copolymer by weight with an ionometer monomer, and 0.01~10 parts of polyfunctional hardener by weight.

Description

Antistatic adhesive film and composition for manufacturing antistatic adhesive film {ANTISTATIC PRESSURE-SENSITIVE ADHESIVE FILM AND COMPOSITION FOR MANUFACTURING OF PRESSURE-SENSITIVE ADHESIVE FILM}

The present invention relates to an antistatic pressure-sensitive adhesive film and a composition for preparing the antistatic pressure-sensitive adhesive film, comprising a (meth) acrylic copolymer containing an ionic monomer in a release film and an antistatic pressure-sensitive adhesive composition containing a polyfunctional curing agent. The present invention relates to an antistatic pressure-sensitive adhesive film and a composition for preparing an antistatic pressure-sensitive adhesive film in which a base film is not used.

Adhesives are widely used in sheets, films, labels, tapes, etc. in all industries such as packaging, optics, construction / civil engineering, and automobiles due to their ease of use. .

In particular, when the release film is peeled from the adhesive layer in the process of attaching the polarizing plate in the manufacturing of the liquid crystal display, static electricity is generated. The static electricity affects the alignment of the liquid crystal inside the liquid crystal display and may cause a defect of the liquid crystal display. Can be.

At this time, the generation of static electricity can be suppressed by forming an antistatic layer on the outer surface of the polarizing plate, but the effect is insufficient, there is a problem that does not prevent the generation of static electricity at the source, in order to suppress the fundamental occurrence of static electricity, antistatic of the adhesive Function is required.

In general, a method of adding an electrically conductive material such as an electrically conductive metal powder or carbon particles to an antistatic adhesive and a method of adding an ionic material such as a surfactant to the pressure sensitive adhesive.

However, when conductive particles or carbon are applied in order to impart antistatic properties, a large amount should be added, and thus the transparency of the pressure-sensitive adhesive may be deteriorated. When the surfactant is applied, it is susceptible to humidity. The physical properties of the adhesive film may be lowered.

As an example of the prior art, Korean Patent Laid-Open Publication No. 2004-0030919 discloses an antistatic pressure-sensitive adhesive using an antistatic agent including a pressure-sensitive adhesive and one or more organic salts, and also Korean Patent Publication No. 2008-0027263 Discloses a pressure-sensitive adhesive comprising a water dispersion type (meth) acrylic polymer and an ionic liquid containing from 50 to 99.9% by weight of a (meth) acrylate having an alkyl group having 1 to 14 carbon atoms as a monomer component.

However, when the above monomolecular organic salts or ionic liquids are used, the bleed out problem of the pressure-sensitive adhesive may occur due to the migration of the antistatic agents to the surface.

Korean Patent No. 057666 discloses a copolymer comprising a 2-isopropyl-2-oxazoline crosslinker and a copolymer copolymerized with a vinyl monomer capable of forming quaternary ammonium, one or two or more vinyl comonomers, and a monomer comprising a carboxyl group. An antistatic pressure sensitive adhesive prepared by copolymerization was prepared, but quaternary ammonium was formed by neutralizing acrylic acid, a curing site, with a tertiary amine. In this case, it is difficult to expect stable cohesion because the curing density with the oxazoline crosslinking agent decreases. There is.

Therefore, there is an urgent need for an antistatic adhesive film having excellent compatibility and excellent durability and antistatic performance.

In order to solve the problems of the prior art, the present inventors manufacture an antistatic adhesive film by laminating a pressure-sensitive adhesive composition containing a (meth) acrylic copolymer containing an ionic monomer and a polyfunctional curing agent on a release film. The present invention was completed by confirming that the bleed out phenomenon in which the pressure-sensitive adhesive component moves to the surface of the pressure-sensitive adhesive layer and is precipitated is improved while being excellent in preventing resistance, durability, time stability, and adhesion.

It is an object of the present invention to laminate a pressure-sensitive adhesive composition containing an (meth) acrylic copolymer containing an ionic monomer and a polyfunctional curing agent in an optimum ratio in a release film, thereby bleeding out of the composition while providing excellent antistatic properties. It is to provide an antistatic adhesive film that is not applied to the improved base film.

Another object of the present invention is to provide an antistatic pressure-sensitive adhesive composition applied to the antistatic pressure-sensitive adhesive film.

In order to achieve the above object, the present invention is a pressure-sensitive adhesive containing 0.01 to 10 parts by weight of a multifunctional curing agent based on 100 parts by weight of a (meth) acrylic copolymer containing an ionic monomer on the first release film, the first release film. It provides a pressure-sensitive adhesive layer formed by applying the composition and an antistatic pressure-sensitive adhesive film is laminated on the second release film on the pressure-sensitive adhesive layer.

In this case, the (meth) acrylic copolymer containing the ionic monomer is 1) to 100 parts by weight of alkyl (meth) acrylate having an alkyl group having 4 to 12 carbon atoms, 2) 0.1 to 0.1 vinyl monomer having an ionic functional group. 30 parts by weight; 3) 0.01 to 5.0 parts by weight of a vinyl monomer having a carboxyl group; And 4) 0.05 to 3.0 parts by weight of a vinyl monomer having a hydroxyl group may be prepared by emulsion polymerization, wherein the ionic functional group is ammonium, phosphonium, arsonium, oxonium, sulfonium, selenium, fluoronium, and iodonium Any one or more selected from the group consisting of may be used.

At this time, it is preferable that the antistatic adhesive film of the present invention has a peeling voltage of 0.5 Kv or less and a surface resistance of 10 ⁶ to 10 ¹¹ Pa / □.

Furthermore, this invention provides the antistatic adhesive composition containing 0.01-10 weight part of polyfunctional hardening | curing agents with respect to 100 weight part of (meth) acrylic-type copolymers containing an ionic monomer.

In this case, the (meth) acrylic copolymer containing the ionic monomer is 1) to 100 parts by weight of alkyl (meth) acrylate having an alkyl group having 4 to 12 carbon atoms, 2) 0.1 to 0.1 vinyl monomer having an ionic functional group. 30 parts by weight; 3) 0.01 to 5.0 parts by weight of a vinyl monomer having a carboxyl group; And 4) 0.05 to 3.0 parts by weight of a vinyl monomer having a hydroxyl group may be prepared by emulsion polymerization, wherein the ionic functional group is ammonium, phosphonium, arsonium, oxonium, sulfonium, selenium, fluoronium, and iodonium Any one or more selected from the group consisting of may be used.

The antistatic pressure-sensitive adhesive film of the present invention is a pressure-sensitive adhesive layer formed by applying a pressure-sensitive adhesive composition in which the (meth) acrylic copolymer containing an ionic monomer prepared by emulsion polymerization and a polyfunctional curing agent are mixed in an optimum content to a release film. By forming a structure in which the ionic functional group is attached to the polymer main chain, it has excellent durability reliability, time stability, 0.5 kV or less peeling voltage, and antistatic property of 10 ⁶ ~ 10 ¹¹ Ω / □ surface resistance level. The problem that the pressure-sensitive adhesive component gets on the adherend can be improved.

The present invention is a pressure-sensitive adhesive layer is formed by applying the pressure-sensitive adhesive composition containing 0.01 to 10 parts by weight of the polyfunctional curing agent to 100 parts by weight of the (meth) acrylic copolymer containing an ionic monomer on the first release film, An antistatic adhesive film having a second release film laminated thereon, and a release film is laminated on the upper and lower surfaces of the adhesive layer without a separate substrate.

The (meth) acrylic copolymer containing an ionic monomer in the pressure-sensitive adhesive composition is 1) based on 100 parts by weight of an alkyl (meth) acrylate having an alkyl group having 4 to 12 carbon atoms, 2) a vinyl monomer having an ionic functional group 0.1-30 parts by weight; 3) 0.01 to 5.0 parts by weight of a vinyl monomer having a carboxyl group; And 4) 0.05 to 3.0 parts by weight of a vinyl monomer having a hydroxyl group, prepared by emulsion polymerization, by copolymerizing a vinyl monomer having a hydrophobic (meth) acrylic monomer and a hydrophilic ionic functional group on an emulsion to have an ionic functional group. The dispersion of the vinyl monomer can be optimized. Thus, in the pressure-sensitive adhesive composition, since the ionic functional group having a charging function is evenly distributed in the polymer chain, when applied to the pressure-sensitive adhesive layer, the bleed out phenomenon in which the pressure-sensitive adhesive precipitates on the surface of the pressure-sensitive adhesive layer is improved. An adhesive film can be provided.

At this time, the alkyl (meth) acrylate having an alkyl group having 4 to 12 carbon atoms is not particularly limited as long as it is known, and isooctyl acrylate, isononyl acrylate, 2-methyl-butyl acrylate, 2-ethyl are preferred examples. n-hexyl acrylate, n-butyl acrylate, isobutyl acrylate, hexyl acrylate, n-octyl acrylate, n-octyl methacrylate, n-nonyl acrylate, isoamyl acrylate, n-decyl acryl Latex, isodecyl acrylate, isodecyl methacrylate, isobornyl acrylate, 4-methyl-2-pentyl acrylate and dodecyl acrylate.

The vinyl monomer having the ionic functional group has a structure in which an ionic functional group is attached to the terminal of the vinyl monomer, and is evenly distributed in the adhesive composition in a state of being connected to the polymer chain.

At this time, the vinyl monomer having the ionic functional group may be contained in 0.1 to 30 parts by weight based on 100 parts by weight of the alkyl (meth) acrylate having an alkyl group having 4 to 12 carbon atoms, if the content is less than 0.1 parts by weight It is difficult to expect the antistatic function, and if it exceeds 30 parts by weight, the increase in hygroscopicity and the reliability may be lowered, which is not preferable.

The ionic functional group may be any one or more selected from the group consisting of ammonium, phosphonium, arsonium, oxonium, sulfonium, selenium, fluoronium and iodonium.

The vinyl monomer having a carboxyl group may contain 0.01 to 5.0 parts by weight based on 100 parts by weight of an alkyl (meth) acrylate having an alkyl group having 4 to 12 carbon atoms, and if the content is less than 0.01 parts by weight, a sufficient crosslinked structure is formed. It is not possible to expect excellent cohesion of the pressure-sensitive adhesive layer, and if the content exceeds 5.0 parts by weight, it is not preferable because the pot life becomes short after the addition of the multifunctional curing agent.

At this time, a preferable example of the vinyl monomer having the carboxyl group is alkyl (meth) acrylate, and in particular, there are (meth) acrylic acid, crotonic acid, fumaric acid, maleic acid, itaconic acid and glutamic acid. The above can be mixed and used.

The vinyl-based monomer having a hydroxyl group may be contained in 0.05 to 3.0 parts by weight, if the content is less than 0.05 parts by weight can not form a sufficient cross-linking structure can not be expected excellent cohesion, if the content exceeds 3.0 parts by weight multifunctional curing agent Pot life is shortened after addition, which is undesirable.

At this time, a preferable example of the vinyl monomer which has the said hydroxyl group is (meth) acrylate, Especially 2-hydroxy ethyl (meth) acrylate, 2-hydroxy butyl (meth) acrylate, 4-hydroxy ethyl (meth) ) Acrylate and 4-hydroxy butyl (meth) arc related.

Since the polyfunctional curing agent applied to the present invention can increase the curing density at the time of reaction as compared to the bifunctional curing agent, the cohesion force of the adhesive layer can be improved. At this time, the multifunctional curing agent The use of 0.01 to 10 parts by weight is preferable with respect to 100 parts by weight of the (meth) acrylic copolymer, and if the content is less than 0.01 parts by weight, sufficient crosslinking structure cannot be formed and excellent cohesive force of the adhesive layer cannot be expected, and 10 parts by weight If exceeded, the pot life of the pressure-sensitive adhesive composition after the curing agent is added is not preferable.

The multifunctional curing agent may be an organic or polyfunctional metal chelate, and examples of the organic curing agent include an epoxy curing agent, an isocyanate curing agent, an imine crosslinking agent, and the like.

In addition, the polyfunctional metal chelate is a structure in which the polyvalent metal ion is covalently or coordinating with an organic compound. As the polyvalent metal ion, Al, Cr, Zr, Co, Cu, Fe, Ni, V, Zn, In, Ca, Mg, Mn, Y, Ce, Sr, Ba, Mo, La, Sn, Ti, and the like. Examples of the organic compound covalently or coordinately bonded include alkyl esters, alcohol compounds, carboxylic acid compounds, and ether compounds. And ketone compounds.

In particular, in the present invention, the use of an isocyanate curing agent is preferable in terms of improving the adhesion between the release film and the adhesive layer, and examples thereof include 2,4-tolylene diisocyanate, diphenylmethane 4,4'-diisocyanate, tetra Methylene diisocyanate, dicyclohexyl-methane-4,4'-diisocyanate, hexamethylene diisocyanate, isocyanate trimer and isophorone diisocyanate.

At this time, the thickness of the adhesive layer formed on the antistatic adhesive film of the present invention is not particularly limited, and may be limited depending on the type of adherend to which the antistatic film is applied or the degree of adhesive force required.

The thickness of the adhesive layer may be adjusted as a distance between the comma coater and the surface of the release film, and may include a gravure court method, a blade court method, a wire bar court method, and a reverse coat. A coating method such as a court method, a comma court method, or the like may be used, and a release film applicable to the present invention may be a known one.

The antistatic pressure-sensitive adhesive film of the present invention having the above structure improves the bleed out phenomenon in which the pressure-sensitive adhesive composition is transferred to the surface of the pressure-sensitive adhesive layer, and at the same time, the surface resistance of 1 × 10 ¹² Ω / □ or less and 0.5 The peeling voltage of Kv or less can be satisfied at the same time, and preferably, the surface resistance in the range of 1 × 10 ⁶ to 1 × 10 ¹¹ kPa / sq.

At this time, when the surface resistance is 1 × 10 ¹¹ Ω / □ or more, the antistatic function is not sufficient, the static electricity generated by the peeling of the base film and the friction of the optical film is charged so that the circuit breakage of the liquid crystal cell or the alignment of the liquid crystal are poor. If the surface resistance is 1 × 10 ⁶ Ω / □ or less, it may cause an increase in hygroscopicity and a decrease in reliability due to the excessive inclusion of the antistatic component.

That is, the present invention is a pressure-sensitive adhesive layer formed by applying a pressure-sensitive adhesive composition containing a (meth) acrylic copolymer and a polyfunctional curing agent containing an ionic monomer prepared by emulsion polymerization to a release film, the ionic monomer is formed in the adhesive layer Evenly distributed, durability reliability, time stability and antistatic property are secured, and the bleed out and pressure-sensitive adhesive components that the adhesive composition moves to the surface of the adhesive layer and are deposited on the adhesive are improved. Films may be provided.

Furthermore, the present invention may provide an antistatic pressure-sensitive adhesive composition applied to the antistatic pressure-sensitive adhesive film, and more specifically, a multifunctional curing agent 0.01 to 10 based on 100 parts by weight of the (meth) acrylic copolymer containing an ionic monomer. An adhesive composition containing parts by weight can be provided.

In this case, the (meth) acrylic copolymer containing the ionic monomer is 1) to 100 parts by weight of alkyl (meth) acrylate having an alkyl group having 4 to 12 carbon atoms, 2) 0.1 to 0.1 vinyl monomer having an ionic functional group. 30 parts by weight; 3) 0.01 to 5.0 parts by weight of a vinyl monomer having a carboxyl group; And 4) 0.05 to 3.0 parts by weight of a vinyl monomer having a hydroxyl group may be prepared by emulsion polymerization, wherein the ionic functional group is ammonium, phosphonium, arsonium, oxonium, sulfonium, selenium, fluoronium, and iodine Any one or more selected from the group consisting of aluminum may be used.

More detailed description of the antistatic pressure-sensitive adhesive composition of the present invention is the same as described above.

Hereinafter, the present invention will be described in detail with reference to examples.

The following examples are merely to illustrate the invention, but the scope of the present invention is not limited to the following examples.

< Example  1>

One. ( Meta Acrylic Copolymer Preparation

90 wt% n-butylacrylate (composition A), 3 wt% acrylic acid (composition B), 2 wt% 2-hydroxyethyl acrylate (composition C) in a 1L reactor equipped with a high speed stirrer, titrator, cooling device and thermometer %, 2- (acryloyloxy) trimethylammonium chloride (composition D) was mixed, 200 parts by weight of distilled water and 1 part by weight of potassium persulfate were added to 100 parts by weight of the mixture, followed by a high speed stirrer at room temperature. After stirring with reflux for 1 hour with nitrogen gas and then emulsion polymerization for 6 hours at 40 ~ 60 ℃ to prepare an ionic monomer-containing (meth) acrylic copolymer resin.

2. Manufacture of antistatic adhesive film

Based on 100 parts by weight of the prepared ionic monomer-containing (meth) acrylic copolymer, 5% by weight of toluene diisocyanate (component 2) was dissolved in ethyl acetate to produce a (meth) acrylic antistatic adhesive composition having a nonvolatile content of 20% by weight. After the preparation, it was coated with a 25 μm release film (RPC-101, Toray Saehan Co., Ltd.) and dried to form an adhesive layer, and the light release release film (RPS-101, Toray Saehan Co., Ltd.) on the adhesive layer. ) And an antistatic adhesive film was prepared.

<Example 2>

In preparing (meth) acrylic copolymers, ionic monomers are contained by applying (4-vinylbenzyl) trimethylammonium chloride (composition E) instead of 2- (acryloyloxy) trimethylammonium chloride (composition D) Except for producing an acrylic copolymer resin, it was carried out in the same manner as in Example 1 to prepare an antistatic adhesive film.

<Example 3>

(3- (2- (6-formyl-pyridin-2-yl) -benzyl) -triphenyl instead of 2- (acryloyloxy) trimethylamonium chloride (composition D) in preparing a (meth) acrylic copolymer Except for preparing an ionic monomer-containing (meth) acrylic copolymer resin by applying phosphonium bromide (composition F), it was carried out in the same manner as in Example 1 to prepare an antistatic adhesive film.

<Example 4>

In the preparation of the (meth) acrylic copolymer, 88% by weight of n-butyl acrylate (composition A), 3% by weight of acrylic acid (composition B), 2% by weight of 2-hydroxyethyl acrylate (composition C) and 2- ( Acryloyloxy) Trimethylammonium chloride (composition D) 7% by weight of an antistatic pressure-sensitive adhesive film was carried out in the same manner as in Example 1, except that the (meth) acrylic copolymer resin was prepared by mixing Was prepared.

<Example 5>

 In the preparation of the (meth) acrylic copolymer, 85 wt% of n-butyl acrylate (composition A), 3 wt% of acrylic acid (composition B), 2 wt% of 2-hydroxyethyl acrylate (composition C), and 2- ( Acryloyloxy) An antistatic adhesive film was prepared in the same manner as in Example 1, except that 10 wt% of trimethylammonium chloride (composition D) was mixed to prepare an ionic monomer-containing (meth) acrylic copolymer resin. Was prepared.

Comparative Example 1

In the (meth) acrylic copolymer preparation, except that copolymer resin was prepared by applying stearyltrimethylammonium chloride (composition G) instead of 2- (acryloyloxy) trimethylamonium chloride (composition D), In the same manner as in Example 1 to prepare an antistatic adhesive film.

Comparative Example 2

In the preparation of the (meth) acrylic copolymer, 88% by weight of n-butyl acrylate (Composition A), 3% by weight of acrylic acid (Composition B), 2% by weight of 2-hydroxyethyl acrylate (Composition C) and stearyl trimethyl An antistatic pressure-sensitive adhesive film was prepared in the same manner as in Example 1 except that 7 wt% of ammonium chloride (composition G) was applied to prepare a copolymer resin.

Comparative Example 3

In the preparation of the (meth) acrylic copolymer, 85% by weight of n-butyl acrylate (Composition A), 3% by weight of acrylic acid (Composition B), 2% by weight of 2-hydroxyethyl acrylate (Composition C) and stearyl trimethyl An antistatic pressure-sensitive adhesive film was prepared in the same manner as in Example 1, except that 10 wt% of ammonium chloride (composition G) was applied to prepare a copolymer resin.

< Experimental Example >

One. Peel force  Measure

After removing the light peeling release film of the antistatic adhesive film, it is attached to the 100mm PET film by reciprocating once with a 2kg roll. After the heavy release film is removed and then attached to the non-alkaline glass plate in the same manner. The glass plate with the pressure-sensitive adhesive film was autoclaved at 50 ° C. and 0.5 MPa for 30 minutes, then left at room temperature for 2 hours. Shear steel under conditions of peeling angle 180 ^o and speed 300 mm / min using an Instron measuring equipment. The degree was measured.

2. Surface resistance measurement

After manufacturing the antistatic adhesive film into the sample of 200mm × 200mm size, remove the release film and apply a voltage of 100V by using a resistivity meter (Trex Corporation, 152-CE-EX product) under 23 ℃, 50% relative humidity environment. It applied for 1 minute, measured the surface resistance of the adhesion layer 3 times or more, and described the average value.

3. Peeling voltage  Measure

While peeling off the release film of the antistatic adhesive film at a speed of 30 m / min, the constant voltage generated by using a constant voltage meter (manufactured by Statiron-DZ3) at a height of 30 mm from the surface was measured.

4. Determination of Time and Time Stability

After removing the release film of the antistatic adhesive film and attaching it to the glass plate, it was left at room temperature for 6 months and the visual change of the adhesive force with aging time was visually measured. Normal), when there is little, it is written as (excellent), and when there is no (◎).

5. Transcription resistance  Measure

After removing the release film of the antistatic adhesive film and attaching it to the glass plate, the adhesive film was peeled off from the glass plate and the transfer degree of the remaining adhesive was visually measured. If there is little, it is written as ○ (excellent) and if there is no at all ◎ (very good).

6. Bleed  Out measurement

After removing the release film of the antistatic adhesive film and attaching it to the glass plate, the glass plate was left in the reliability chamber at 60 ^° C. and 95% humidity for 500 hours, and then the adhesive sheet was peeled from the glass plate and the contact angle of the surface layer of the peeled adhesive was measured. Measure the degree of transition to the surface of the pressure-sensitive adhesive composition, and if the contact angle is 50 ^o or less, x (defect), △ (normal) if 50 ^o ~ 60 ^o , ○ (excellent) if 60 ^o ~ 70 ^o In the case of more than 70 ^° , ◎ (very good) is indicated.

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Gel fraction (%) 90 88 92 87 85 89 85 81 Adhesive force (gf / inch) 84 65 72 58 45 65 72 58 Surface resistance (Ω / □) 9.8 × 10 ¹⁰ 8.5 × 10 ¹⁰ 8.9 × 10 ¹⁰ 2.3 × 10 ⁹ 4.8 × 10 ⁹ 3.8 × 10 ¹¹ 5.2 × 10 ¹¹ 2.8 × 10 ¹⁰ Peeling Voltage (kV) 0.35 0.23 0.42 0.21 0.16 0.46 0.31 0.30 Jingxian ◎ ◎ ◎ ◎ ○ ○ △ × Transcription resistance ◎ ◎ ◎ ◎ ○ ○ △ × Bleed Out Resistance ◎ ◎ ◎ ◎ ○ △ △ ×

According to the results of the experiment, in Examples 1 to 5 to which the ionic monomer-containing (meth) acrylic copolymer was applied, compared to Comparative Examples 1 to 3 containing a low molecular weight antistatic agent, seizure stability, transfer resistance, and peeling voltage were higher. It is excellent and it can be seen that the problem of bleed out of the pressure-sensitive adhesive composition and the antistatic agent that moves to the surface and precipitates under wet heat reliability conditions (60 ° C., 95% humidity, 500 hours standing) is improved.

Specifically, in the case of applying the general antistatic agent of Comparative Examples 1 to 3, as the amount of the antistatic agent increases, the properties of aging stability and transfer resistance deteriorate, and in particular, peeling of the adhesive surface occurs under the moist heat reliability conditions, and the contact angle is measured. Through this, problems of lowering the contact angle and bleeding out of the antistatic agent occurred.

In addition, in Examples 1 to 5, even when the ionic monomer-containing (meth) acrylic copolymer resin content was increased, physical properties in terms of time stability, transfer resistance, and bleed-out resistance were higher than those of general antistatic agents. It can be seen that it is remarkably excellent.

The antistatic pressure-sensitive adhesive film of the present invention is laminated with a pressure-sensitive adhesive composition in which an ionic monomer-containing (meth) acrylic copolymer prepared by emulsion polymerization and a polyfunctional curing agent are mixed in an optimal amount, so that the ionic functional group is polymer-based. By forming a structure attached to the chain, excellent durability reliability, time stability, and permanent antistatic property can be secured, and at the same time, bleed out and pressure-sensitive adhesive components that adhere to the surface of the pressure-sensitive adhesive composition can be improved. In particular, it is excellent in application to the antistatic adhesive film for optics in the display field.

Although the present invention has been described in detail only with respect to the embodiments described, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications belong to the appended claims.

Claims (8)

1st release film, An adhesive layer formed by applying an adhesive composition containing 0.01 to 10 parts by weight of a multifunctional curing agent to 100 parts by weight of a (meth) acrylic copolymer containing an ionic monomer on the first release film; An antistatic adhesive film having a second release film is laminated on the adhesive layer. The (meth) acrylic copolymer of claim 1, wherein the (meth) acrylic copolymer containing the ionic monomer 1) To 100 parts by weight of alkyl (meth) acrylate having an alkyl group having 4 to 12 carbon atoms, 2) 0.1 to 30 parts by weight of a vinyl monomer having an ionic functional group; 3) 0.01 to 5.0 parts by weight of a vinyl monomer having a carboxyl group; And 4) The antistatic pressure-sensitive adhesive film, characterized in that the vinyl monomer having a hydroxyl group 0.05 ~ 3.0 parts by weight prepared by emulsion polymerization. 3. The method of claim 2, The antistatic pressure-sensitive adhesive film, characterized in that the ionic functional group is any one or more selected from the group consisting of ammonium, phosphonium, arsonium, oxonium, sulfonium, selenium, fluoronium and iodonium. The antistatic adhesive film according to claim 1, wherein the antistatic adhesive film has a peeling voltage of 0.5 Kv or less. The antistatic adhesive film according to claim 1, wherein the surface resistance of the antistatic adhesive film is 10 ⁶ to 10 ¹¹ GPa / □. The antistatic adhesive film composition of Claim 1 containing 0.01-10 weight part of polyfunctional hardening | curing agents with respect to 100 weight part of (meth) acrylic-type copolymers containing an ionic monomer. The (meth) acrylic copolymer containing the ionic monomer according to claim 6 1) To 100 parts by weight of alkyl (meth) acrylate having an alkyl group having 4 to 12 carbon atoms, 2) 0.1 to 30 parts by weight of a vinyl monomer having an ionic functional group; 3) 0.01 to 5.0 parts by weight of a vinyl monomer having a carboxyl group; And 4) The composition for producing an antistatic pressure-sensitive adhesive film, wherein 0.05 to 3.0 parts by weight of the vinyl monomer having a hydroxyl group is prepared by emulsion polymerization. The method of claim 6, The composition for producing an antistatic pressure-sensitive adhesive film, characterized in that the ionic functional group is any one or more selected from the group consisting of ammonium, phosphonium, arsonium, oxonium, sulfonium, selenium, fluoronium and iodonium.