WO2014021622A1 - Adhesive composition - Google Patents

Abstract

The present invention relates to an adhesive composition and, more specifically, to an adhesive composition which contains a specific compound as an additive component thereof, or as a component of a copolymer contained in the adhesive composition, thus having excellent solubility in an organic solvent, effectively inhibiting the corrosion of a metal layer, and having excellent adhesive durability with the metal layer under severe conditions (high temperature and high humidity).

Description

Pressure-sensitive adhesive composition

The present invention relates to a pressure-sensitive adhesive composition which can be applied to an organic solvent system while having a corrosion preventing function of a metal.

In general, a liquid crystal display device (LCD) includes a liquid crystal cell and a polarizing plate containing liquid crystal, and various optical films (phase difference plate, viewing angle magnification film, Brightness enhancement film, etc.) is used.

Such a polarizing plate and an optical film are bonded to a liquid crystal cell using an adhesive. The pressure sensitive adhesive is often used an acrylic pressure sensitive adhesive based on an acrylic polymer having excellent adhesion and transparency. Crosslinking of the acrylic pressure sensitive adhesive utilizes a bond between a crosslinking agent and a functional monomer of an acrylic polymer.

However, the liquid crystal cell including a metal layer such as ITO is corroded by H ₂ O and O ₂ contained in the pressure-sensitive adhesive to form metal oxides, hydroxides and other corrosive products. These may reduce the electrical or mechanical stability of the liquid crystal display, or may cause problems in securing visibility and reliability.

In particular, this problem may be exacerbated when exposed to high temperature and high humidity environments.

In order to improve the corrosiveness of metals, methods of using various preservatives in the pressure-sensitive adhesive composition are known. Corrosion inhibitors include azo compounds (Korean Patent Publication No. 2010-31111), monomers containing carboxyl groups (Korean Patent No. 671,356), and compounds containing at least one atom such as phosphorus, sulfur, nitrogen, or oxygen ( Korean Patent No. 1,047,925) and the like.

The double phosphorus compound is used as a corrosion inhibitor in various fields, but it is usually dissolved in water, and thus there is a limit in the field of use thereof. In particular, there is a problem that cannot be used in the electric / electronic field, such as a liquid crystal display device that restricts the use of water.

An object of the present invention is to provide a pressure-sensitive adhesive composition which can suppress corrosion of a metal layer while exhibiting excellent solubility in an organic solvent using a specific compound having a phosphoric acid functional group.

In order to achieve the above object, the present invention provides a pressure-sensitive adhesive composition containing a compound of formula (1).

[Formula 1]

(Wherein R ₁ is hydrogen or a methyl group, R ₂ is an alkyl group having 1 to 10 carbon atoms, X is an integer of 1 to 10, and n is an integer of 1 to 2).

Preferably, Formula 1 may be R ₂ is an alkyl group having 1 to 4 carbon atoms and X may be an integer of 1 to 6.

The pressure-sensitive adhesive composition may contain an acrylic copolymer and a compound of Formula 1.

The compound of Formula 1 may contain 1 to 20 parts by weight based on 100 parts by weight of the acrylic copolymer.

The pressure-sensitive adhesive composition may contain an acrylic copolymer copolymerized with the compound of Formula 1.

The acrylic copolymer may contain a (meth) acrylate monomer having an alkyl group having 1 to 12 carbon atoms, a polymerizable monomer having a crosslinkable functional group, and a compound of Formula 1.

The compound of Formula 1 may contain 1 to 20 parts by weight based on 100 parts by weight of the (meth) acrylate monomer having an alkyl group having 1 to 12 carbon atoms.

The acrylic copolymer may have a weight average molecular weight (polystyrene equivalent, Mw) of 50,000 to 2 million.

The pressure-sensitive adhesive composition may contain an acrylic copolymer copolymerized with a compound of Formula 1, and a compound of Formula 1.

The pressure-sensitive adhesive composition of the present invention has the advantage of being excellent in solubility in organic solvents and at the same time effectively suppressing corrosion of the metal layer.

In addition, the pressure-sensitive adhesive composition of the present invention is not only excellent in adhesive force with the metal layer, but also has an advantage of excellent adhesive durability under high temperature or high temperature and high humidity conditions.

Therefore, the pressure-sensitive adhesive composition is expected to have high utility in the field of electrical / electronic components, which require much bonding of metals or metal oxide semiconductors.

The present invention relates to a pressure-sensitive adhesive composition which can be applied to an organic solvent system while having a corrosion preventing function of a metal.

Hereinafter, the present invention will be described in detail.

The pressure-sensitive adhesive composition of the present invention contains a compound of formula (1).

[Formula 1]

(Wherein R ₁ is hydrogen or a methyl group, R ₂ is an alkyl group having 1 to 10 carbon atoms, X is an integer of 1 to 10, and n is an integer of 1 to 2).

Preferably, R <_2> is a C1-C4 alkyl group and X is an integer of 1-6.

The compound of Formula 1 may effectively inhibit corrosion of the metal layer by chemically reacting with the metal surface to form a kind of protective film (corrosion preventing film). The compound is absorbed by the metal surface to form a stable protective film on the adhesive interface to prevent water from acting on the surface of the metal layer can suppress corrosion.

In addition, it may be possible to dissolve in the organic solvent by the repetition of the-(OR ₂ )-functional group contained in the formula (1).

In general, compounds containing phosphoric acid, such as the compound of Formula 1, have high solubility in alcohol or water, but have low solubility in organic solvents, particularly nonpolar organic solvents.

However, when used in the field of pressure-sensitive adhesive as in the present invention, since a polar solvent such as acetone or methyl ethyl ketone is used as the solvent of the pressure-sensitive adhesive, the solubility of the compound of Formula 1 does not need to be specifically considered.

Such compounds of formula (1) may be used synthetic or commercially available products. As a commercial item, the PAM series by RHODIA company can be used as an example. Among them, PAM100 and PAM200 are preferred because of their excellent compatibility with polar organic solvents.

On the other hand, the pressure-sensitive adhesive composition of the present invention may contain an acrylic copolymer copolymerized by containing the compound of formula (1). The compound of Formula 1 is used as a component of the monomer forming the acrylic copolymer.

It is preferable that the acryl-type copolymer of this invention contains the (meth) acrylate monomer which has a C1-C12 alkyl group, the polymerizable monomer which has a crosslinkable functional group, and the compound of General formula (1). Here, (meth) acrylate means acrylate and methacrylate.

Examples of the (meth) acrylate monomer having an alkyl group having 1 to 12 carbon atoms include n-butyl (meth) acrylate, 2-butyl (meth) acrylate, t-butyl (meth) acrylate, and 2-ethylhexyl (meth). ) Acrylate, ethyl (meth) acrylate, methyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, pentyl (meth) acrylate, n-octyl (meth) acrylate Isooctyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, lauryl (meth) acrylate, and the like, among which n-butyl acrylate and 2-ethylhexyl acrylate Or mixtures thereof. These can be used individually or in mixture of 2 or more types.

The polymerizable monomer having a crosslinkable functional group serves to provide durability and cutability by reinforcing the cohesive force or adhesive strength of the pressure-sensitive adhesive composition by chemical bonding. For example, the monomer which has a hydroxyl group, the monomer which has a carboxy group, the monomer which has an amide group, the monomer which has a tertiary amine group, etc. are mentioned, These can be used individually or in mixture of 2 or more types.

As a monomer which has a hydroxyl group, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 2-hydroxyethylene glycol (meth) acrylate, 2-hydroxypropylene glycol (meth) acrylate, hydroxyalkylene glycol having 2 to 4 carbon atoms of an alkylene group ( Meta) acrylate, 4-hydroxybutyl vinyl ether, 5-hydroxypentyl vinyl ether, 6-hydroxyhexyl vinyl ether, 7-hydroxyheptyl vinyl ether, 8-hydroxyoctyl vinyl ether, 9-hydroxynonyl Vinyl ether, 10-hydroxydecyl vinyl ether, etc. are mentioned, Among these, 4-hydroxybutyl vinyl ether is preferable.

As a monomer which has a carboxy group, Monovalent acids, such as (meth) acrylic acid and a crotonic acid; Diacids such as maleic acid, itaconic acid and fumaric acid, and monoalkyl esters thereof; 3- (meth) acryloylpropionic acid; Succinic anhydride ring-opening adduct of 2-hydroxyalkyl (meth) acrylate with 2-3 carbon atoms of an alkyl group, Succinic anhydride ring opening adduct of hydroxyalkylene glycol (meth) acrylate with 2-4 carbon atoms of an alkylene group And a compound obtained by ring-opening addition of succinic anhydride to a caprolactone adduct of 2-hydroxyalkyl (meth) acrylate having 2 to 3 carbon atoms of an alkyl group, and among these, (meth) acrylic acid is preferable.

Examples of the monomer having an amide group include (meth) acrylamide, N-isopropylacrylamide, N-tert-butylacrylamide, 3-hydroxypropyl (meth) acrylamide, 4-hydroxybutyl (meth) acrylamide, 6 -Hydroxyhexyl (meth) acrylamide, 8-hydroxyoctyl (meth) acrylamide, 2-hydroxyethylhexyl (meth) acrylamide, etc. are mentioned, Among these, (meth) acrylamide is preferable.

Monomers having a tertiary amine group include N, N- (dimethylamino) ethyl (meth) acrylate, N, N- (diethylamino) ethyl (meth) acrylate, and N, N- (dimethylamino) propyl ( Meth) acrylate, etc. are mentioned.

It is preferable that the polymerizable monomer which has such a crosslinkable functional group is contained in 0.05-10 weight part with respect to 100 weight part of (meth) acrylate monomers which have a C1-C12 alkyl group, More preferably, it is 0.1-8 weight part good. If the content is less than 0.05 parts by weight, the cohesive force of the pressure-sensitive adhesive may be reduced, the durability may be lowered. If the content is more than 10 parts by weight, the adhesive strength is lowered by a high gel fraction may cause problems in durability.

The compound of Formula 1 is preferably contained in 1 to 20 parts by weight, more preferably 2 to 10 parts by weight based on 100 parts by weight of the (meth) acrylate monomer having an alkyl group having 1 to 12 carbon atoms. If the content is less than 1 part by weight, the corrosion protection effect may be insignificant, and when it contains 20 parts by weight, there is a problem in that the adhesive force is too high to reduce reworkability.

The acrylic copolymer may further contain other polymerizable monomers in addition to the above monomers in a range of not lowering the adhesive strength, for example, 10 parts by weight or less based on the total amount.

The production method of the copolymer is not particularly limited, and may be prepared using a method such as bulk polymerization, solution polymerization, emulsion polymerization or suspension polymerization, which are commonly used in the art, and solution polymerization is preferable. In addition, a solvent, a polymerization initiator, a chain transfer agent for molecular weight control, and the like, which are usually used in the polymerization, may be used.

The acrylic copolymer preferably has a weight average molecular weight (polystyrene equivalent, Mw) measured by gel permeation chromatography (GPC) of 50,000 to 2 million, more preferably 400,000 to 2 million. If the weight average molecular weight is less than 50,000, there is a lack of cohesion between the copolymers may cause problems in adhesion durability, if the weight average molecular weight is more than 2 million may require a large amount of dilution solvent to ensure fairness during coating.

The pressure-sensitive adhesive composition of the present invention may further contain a crosslinking agent.

A crosslinking agent can improve adhesiveness and durability, and can maintain the reliability and shape of an adhesive at high temperature.

The crosslinking agent may be an isocyanate type, an epoxy type, a melamine type, a peroxide type, a metal chelate type, an oxazoline type, or the like, and one or two or more kinds thereof may be used. Double isocyanate type or epoxy type is preferred.

The isocyanate type is tolylene diisocyanate, xylene diisocyanate, 2,4-diphenylmethane diisocyanate, 4,4-diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, tetramethyl xylene diisocyanate, naphthalenedi Diisocyanate compounds such as isocyanate; Diisocyanate obtained from 2 moles of an adduct obtained by reacting 3 moles of a diisocyanate compound with 1 mole of a polyhydric alcohol compound such as trimethylolpropane, an isocyanurate obtained by self-condensing 3 moles of the diisocyanate compound, and 3 moles of the diisocyanate compound And polyfunctional isocyanate compounds containing three functional groups such as biuret, triphenylmethanetriisocyanate, and methylenebistriisocyanate, in which the remaining 1 mole of diisocyanate is condensed to urea.

The epoxy-based ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, tripropylene glycol diglycidyl ether, polypropylene glycol di Glycidyl ether, neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, polytetramethylene glycol diglycidyl ether, glycerol diglycidyl ether, glycerol triglycidyl ether, di Glycerol polyglycidyl ether, polyglycerol polyglycidyl ether, resorcin diglycidyl ether, 2,2-dibromoneopentyl glycol diglycidyl ether, trimethylolpropanetriglycidyl ether, pentaerythritol poly Glycidyl ether, sorbitol polyglycidyl ether, adipic acid diglycidyl ester, phthalic acid diglycidyl ester, tris (glycidyl) isocyanuric Tris (glycidoxyethyl) isocyanurate, 1,3-bis (N, N-glycidylaminomethyl) cyclohexane, N, N, N ', N'-tetraglycidyl-m- Xylylenediamine etc. are mentioned.

Examples of the melamine type include hexametholol melamine, hexamethoxymethyl melamine, hexabutoxymethyl melamine, and the like.

Such a crosslinking agent may be contained in an amount of 0.1 to 15 parts by weight, preferably 0.3 to 5 parts by weight, based on 100 parts by weight of the acrylic copolymer. If the content is less than 0.1 part by weight, the cohesive force may be reduced due to insufficient crosslinking degree, thereby impairing the adhesive durability and the cleavage property. If the content is more than 15 parts by weight, problems may occur in reducing residual stress due to excessive crosslinking reaction.

In addition, the pressure-sensitive adhesive composition of the present invention may contain an acrylic copolymer and the compound of Formula 1. The compound of Formula 1 is used as a component of an additive of the pressure-sensitive adhesive composition.

At this time, the compound of Formula 1 is preferably contained in 1 to 20 parts by weight, more preferably 2 to 15 parts by weight with respect to 100 parts by weight of the acrylic copolymer. If the content is less than 1 part by weight, the anti-corrosion effect may be insignificant, and if it exceeds 20 parts by weight, the adhesive force may be too high to reduce reworkability (reworkability).

In addition, the pressure-sensitive adhesive composition of the present invention may contain an acrylic copolymer copolymerized by containing a compound of Formula 1, and a compound of Formula 1. Formula 1 is used as an additive component of the pressure-sensitive adhesive composition at the same time as the component to form an acrylic copolymer.

In this case, the compound of Formula 1 contained in the acrylic copolymer may be included in an amount of 1 to 10 parts by weight based on 100 parts by weight of the (meth) acrylate monomer having an alkyl group having 1 to 12 carbon atoms. In addition, the compound of Formula 1 used as an additive of the pressure-sensitive adhesive composition may be included in 1 to 10 parts by weight based on 100 parts by weight of the acrylic copolymer.

In addition, the pressure-sensitive adhesive composition may further contain a crosslinking agent, and the type, content and physical properties of the acrylic copolymer and the crosslinking agent are the same as mentioned above.

In addition to the above components, the pressure-sensitive adhesive composition is a silane coupling agent, tackifying resin, antioxidant, leveling agent, surface lubricant, dye, in order to adjust the adhesion, cohesion, viscosity, elastic modulus, glass transition temperature, etc. Additives, such as a pigment, an antifoamer, a filler, a light stabilizer, an antistatic agent, can be further contained.

Since the double silane coupling agent serves to improve the adhesion between the pressure-sensitive adhesive and the base material, it is preferable to contain it. Can be used.

Such additives may be appropriately adjusted in a range not impairing the effects of the present invention, for example, the silane coupling agent may contain 0.1 to 2 parts by weight based on 100 parts by weight of the acrylic copolymer in consideration of adhesion and durability. have.

In particular, the pressure-sensitive adhesive composition of the present invention can be used as a pressure-sensitive adhesive for polarizing plates and a surface protective film for bonding to liquid crystal cells. In addition, it can be used as a general commercial adhesive sheet product as well as a protective film, a reflective sheet, a structural adhesive sheet, a photographic adhesive sheet, a lane marking adhesive sheet, an optical adhesive product, an adhesive for electronic parts, and the like.

Hereinafter, preferred examples are provided to aid the understanding of the present invention, but the following examples are merely for exemplifying the present invention, and it will be apparent to those skilled in the art that various changes and modifications can be made within the scope and spirit of the present invention. It is natural that such variations and modifications fall within the scope of the appended claims.

Preparation Example: Acrylic Copolymer Preparation

Preparation Example 1 Acrylic Copolymer A

85 parts by weight of n-butyl acrylate (BA), 7 parts by weight of methyl acrylate (MA), 2-hydroxyethyl acrylate 2.0 in a 1 L reactor equipped with a refrigeration system to facilitate nitrogen temperature reflux and temperature control. After the addition of the monomer mixture consisting of parts by weight, 1.0 part by weight of acrylic acid and 5.0 parts by weight of PAM200 product (Rhodia), 100 parts by weight of acetone was added as a solvent. Then, after purging nitrogen gas for 1 hour to remove oxygen, it was maintained at 62 ° C. After the mixture was uniformly mixed, 0.07 parts by weight of azobisisobutyronitrile (AIBN) was added as a reaction initiator, and reacted for 6 hours to prepare an acrylic copolymer A having a weight average molecular weight of about 1 million.

Preparation Example 2 Acrylic Copolymer B

In the same manner as in Preparation Example 1, 80 parts by weight of n-butyl acrylate (BA), 7 parts by weight of methyl acrylate (MA), 2.0 parts by weight of 2-hydroxyethyl acrylate, 1.0 parts by weight of acrylic acid, PAM200 products (Rhodia Co., Ltd.) An acrylic copolymer B having a weight average molecular weight of about 1 million was prepared using a monomer mixture composed of 10.0 parts by weight.

Preparation Example 3 Acrylic Copolymer C

In the same manner as in Preparation Example 1, 75 parts by weight of n-butyl acrylate (BA), 7 parts by weight of methyl acrylate (MA), 2.0 parts by weight of 2-hydroxyethyl acrylate, 1.0 parts by weight of acrylic acid, PAM200 products (Rhodia Co., Ltd.) An acrylic copolymer C having a weight average molecular weight of about 1 million was prepared using a monomer mixture composed of 15.0 parts by weight.

Preparation Example 4 Acrylic Copolymer D

In the same manner as in Preparation Example 1, 65 parts by weight of n-butyl acrylate (BA), 7 parts by weight of methyl acrylate (MA), 2.0 parts by weight of 2-hydroxyethyl acrylate, 1.0 parts by weight of acrylic acid, PAM200 products (Rhodia Co., Ltd.) An acrylic copolymer D having a weight average molecular weight of about 1 million was prepared using a monomer mixture composed of 25.0 parts by weight.

Preparation Example 5 Acrylic Copolymer E

In the same manner as in Preparation Example 1, 55 parts by weight of n-butyl acrylate (BA), 7 parts by weight of methyl acrylate (MA), 2.0 parts by weight of 2-hydroxyethyl acrylate, 1.0 parts by weight of acrylic acid, PAM200 products (Rhodia) An acrylic copolymer E having a weight average molecular weight of about 1 million was prepared using a monomer mixture composed of 35.0 parts by weight.

Preparation Example 6 Acrylic Copolymer F

An acrylic copolymer F having a weight average molecular weight of about 1 million was prepared in the same manner as in Preparation Example 1, but using PAM100 (Rhodia) instead of PAM200 (Rhodia).

Preparation Example 7 Acrylic Copolymer G

A monomer mixture consisting of 90 parts by weight of n-butyl acrylate (BA), 7 parts by weight of methyl acrylate (MA), 2.0 parts by weight of 2-hydroxyethyl acrylate, and 1.0 parts by weight of acrylic acid was carried out in the same manner as in Preparation Example 1. Using to prepare an acrylic copolymer G having a weight average molecular weight of about 1 million.

Examples and Comparative Examples: Pressure-sensitive adhesive composition

Example 1-14 and Comparative Example 1-2

As shown in Table 1 below, the components were mixed and then diluted in an organic solvent to prepare a pressure-sensitive adhesive composition.

TABLE 1

The pressure-sensitive adhesive composition prepared above was applied on a release film coated with a silicone release agent to have a thickness of 25 μm, and dried at 100 ° C. for 1 minute to form an adhesive layer.

A pressure-sensitive adhesive polarizing plate was prepared by laminating the pressure-sensitive adhesive layer prepared above on an iodine-based polarizing plate having a thickness of 185 μm. The prepared polarizing plate was stored under curing conditions at 23 ° C. and 60% RH.

Test Example

The physical properties of the pressure-sensitive adhesive composition and pressure-sensitive adhesive polarizing plate prepared in Examples and Comparative Examples were measured by the following method, and the results are shown in Table 2 below.

1. Corrosion resistance of metal layer

The release film of the polarizing plate with pressure-sensitive adhesive was peeled off, the surface of the pressure-sensitive adhesive layer and the aluminum plate were bonded together, and left to stand for 250 hours at 60 ° C. and 95% RH% to prepare a laminate specimen.

The adhesive layer was peeled from the said laminated body, the surface of the aluminum plate which contacted the said adhesive layer was visually observed, and the presence or absence of corrosion was evaluated.

<Evaluation Criteria>

The surface of the aluminum plate is not corroded at all: ○

Surface of aluminum plate is corroded: ×

2. Adhesive force with metal layer (N / 25mm)

After peeling the release film of the polarizing plate with an adhesive, and bonding the surface of an adhesive layer and an aluminum plate. Autoclave treatment was performed at 50 ° C. and 5 kg / cm 2 (490.3 kPa) for 20 minutes. Thereafter, the mixture was left for 24 hours in an atmosphere of 23 ° C. and 50 RH% to prepare a laminate specimen.

The polarizing plate was peeled from the said laminated body at the speed | rate of 300 mm / min, and 180 degree direction, and the adhesive force was measured.

3. Durability of adhesion with metal layer

After peeling the release film of the polarizing plate with an adhesive, and bonding the surface of an adhesive layer and an aluminum plate. Autoclave treatment was performed at 50 ° C. and 5 kg / cm 2 (490.3 kPa) for 20 minutes. Thereafter, the mixture was left for 24 hours in an atmosphere of 23 ° C. and 50 RH% to prepare a laminate specimen.

Thereafter, the laminate specimen was stored for 300 hours under a drying condition at a temperature of 80 ° C., and then the appearance was confirmed (heat test).

<Evaluation Criteria>

Bubble and exfoliation 3 or more acknowledged: ×

Bubble and exfoliation are admitted but less than 3 are admitted: △

Bubbles and Peelings Unidentified: ○

4. Reworkability

The polarizing plate was cut out to a width of 25 mm and a length of 100 mm, the release film was peeled off, and then laminated to Corning's # 1737 glass at a pressure of 0.25 MPa, and the autoclave was treated at 5 atmospheres and 50 ° C. for 20 minutes. Evaluation samples were prepared. After putting it in an oven at 80 ° C., which was heat-resistant, it was taken out after 10 hours, left at room temperature for 120 hours, and then peeled at a speed of 1.3 cm / s. In addition, after being put into an oven at 60 ° C. and 90 RH% of humidity conditions, it was taken out after 12 hours, and left at room temperature for 120 hours, followed by peeling at a speed of 1.3 cm / s.

<Evaluation Criteria>

-In both conditions, there is no adhesive left on the glass substrate and peeling off without tearing of the polarizing plate: ○

There is no adhesive left on the panel under more than one condition or the polarizer is torn during peeling, but some haze is observed on the glass surface:

The adhesive remains on the panel under more than one condition or the polarizer is torn during the peeling process: ×

TABLE 2

As shown in Table 2, the pressure-sensitive adhesive composition of Examples 1 to 14 containing the compound of Formula 1 according to the present invention is superior in corrosion resistance, adhesive strength and adhesive durability (heat resistance conditions) of the metal layer at the same time compared to Comparative Examples 1 to 2 I could confirm that.

In addition, it was confirmed that the physical properties such as adhesion and adhesion durability as described above was confirmed that the compound of Formula 1 was dissolved in the organic solvent.

Claims (9)

1. Pressure-sensitive adhesive composition containing a compound of formula

   [Formula 1]

   

   (Wherein R ₁ is hydrogen or a methyl group, R ₂ is an alkyl group having 1 to 10 carbon atoms, X is an integer of 1 to 10, and n is an integer of 1 to 2).
2. The pressure-sensitive adhesive composition of claim 1, wherein in Formula 1, R ₂ is an alkyl group having 1 to 4 carbon atoms and X is an integer of 1 to 6.
3. The pressure-sensitive adhesive composition of claim 1, wherein the pressure-sensitive adhesive composition contains an acrylic copolymer and a compound of Formula 1.
4. The pressure-sensitive adhesive composition of claim 3, which contains 1 to 20 parts by weight of the compound of Formula 1 and 100 parts by weight of the acrylic copolymer.
5. The pressure-sensitive adhesive composition of claim 1, wherein the pressure-sensitive adhesive composition contains an acrylic copolymer copolymerized with a compound of Formula 1.
6. The pressure-sensitive adhesive composition of claim 5, wherein the acrylic copolymer contains a (meth) acrylate monomer having an alkyl group having 1 to 12 carbon atoms, a polymerizable monomer having a crosslinkable functional group, and a compound of Formula 1.
7. The pressure-sensitive adhesive composition of claim 6, wherein the compound of Formula 1 contains 1 to 20 parts by weight based on 100 parts by weight of the (meth) acrylate monomer having an alkyl group having 1 to 12 carbon atoms.
8. The pressure-sensitive adhesive composition of claim 6, wherein the acrylic copolymer has a weight average molecular weight (polystyrene equivalent, Mw) of 50,000 to 2 million.
9. The pressure-sensitive adhesive composition of claim 1, wherein the pressure-sensitive adhesive composition contains an acrylic copolymer copolymerized with a compound of Formula 1, and a compound of Formula 1.