KR20140140225A - Composition for adhesive - Google Patents

Composition for adhesive Download PDF

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Publication number
KR20140140225A
KR20140140225A KR20130060746A KR20130060746A KR20140140225A KR 20140140225 A KR20140140225 A KR 20140140225A KR 20130060746 A KR20130060746 A KR 20130060746A KR 20130060746 A KR20130060746 A KR 20130060746A KR 20140140225 A KR20140140225 A KR 20140140225A
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group
pressure
acrylic copolymer
sensitive adhesive
carbon atoms
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KR20130060746A
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Korean (ko)
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최한영
유민근
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동우 화인켐 주식회사
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Priority to KR20130060746A priority Critical patent/KR20140140225A/en
Priority to PCT/KR2014/004581 priority patent/WO2014193117A1/en
Publication of KR20140140225A publication Critical patent/KR20140140225A/en

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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04Polyurethanes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40High-molecular-weight compounds
    • C08G18/62Polymers of compounds having carbon-to-carbon double bonds
    • C08G18/6216Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
    • C08G18/622Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids
    • C08G18/6225Polymers of esters of acrylic or methacrylic acid
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04Homopolymers or copolymers of esters
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04Homopolymers or copolymers of esters
    • C09J133/14Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The present invention relates to a pressure-sensitive adhesive composition and, more specifically, to a pressure-sensitive adhesive composition containing an acryl-based copolymer having a hydroxyl group, an acid anhydride of following chemical formula 1, and a cross-linking agent, wherein the acid anhydride acts as a cross-linking agent to improve pressure-sensitive adhesion and cohesiveness to have excellent pressure-sensitive adhesion durability in an extreme condition (high temperature or high temperature and high moisture). [Chemical formula 1] (In the formula, R is an aliphatic hydrocarbon group having four to eight carbon atoms, substituent hydrocarbon group having four to eight carbon atoms, or an aromatic hydrocarbon group having six to twenty carbon atoms.).

Description

점착제 조성물 {COMPOSITION FOR ADHESIVE}[0001] COMPOSITION FOR ADHESIVE [0002]

본 발명은 점착 내구성이 우수한 점착제 조성물에 관한 것이다.
The present invention relates to a pressure-sensitive adhesive composition having excellent adhesion durability.

일반적으로 액정표시장치(Liquid crystal display device, LCD)는 액정을 포함하고 있는 액정셀과 편광판이 구비되며, 상기 액정표시장치의 표시 품위를 향상시키기 위하여 여러 가지 광학필름(위상차판, 시야각 확대필름, 휘도 향상필름 등)이 사용된다. In general, a liquid crystal display device (LCD) includes a liquid crystal cell including a liquid crystal and a polarizing plate. In order to improve the display quality of the liquid crystal display device, various optical films (retardation plate, A brightness enhancement film or the like) is used.

액정표시장치는 퍼스널 컴퓨터나 텔레비전, 카 내비게이션 등의 표시장치로서 광범위하게 사용되고 있다. 그에 따라 고온 고습과 같은 가혹한 환경하에서의 사용에 있어서도 내구성이 우수한, 즉, 장기간의 사용에 있어서도 벗겨짐이나 기포발생 등이 발생하지 않는 점착제가 요구되고 있다.BACKGROUND ART Liquid crystal display devices are widely used as display devices for personal computers, televisions, car navigation systems, and the like. Accordingly, there is a demand for a pressure-sensitive adhesive which is excellent in durability even in use under severe environments such as high temperature and high humidity, that is, does not cause peeling or bubble generation even in long-term use.

이에 카르복실기와 수산기를 갖는 아크릴계 공중합체에 이소시아네이트 화합물을 가교제로 사용한 점착제 조성물이 제시되어 있다(일본특허공개 제2004-224873호). 또한, 카르복실기를 가진 아크릴계 공중합체에, 다작용성 금속 킬레이트를 사용한 점착제 조성물에 제시되어 있다(일본특허공개 2002-214439호)A pressure-sensitive adhesive composition using an isocyanate compound as a crosslinking agent in an acrylic copolymer having a carboxyl group and a hydroxyl group has been proposed (JP-A-2004-224873). Further, a pressure-sensitive adhesive composition using a polyfunctional metal chelate in an acrylic copolymer having a carboxyl group has been proposed (JP-A-2002-214439)

이들은 대형 액정표시장치에 적용하는 경우 만족할 정도의 내구성을 나타내지 못하는 단점이 있다.They are disadvantageous in that they do not show satisfactory durability when applied to a large-sized liquid crystal display device.

이를 개선하기 위하여 카르복실기를 가진 아크릴계 공중합체에, 금속 킬레이트계 경화제와 이소시아네이트계 경화제 등의 이종의 경화제를 사용한 점착제 조성물이 제시되었다(한국등록특허 제1148141호). 그러나 상기 카르복실기를 함유한 아크릴계 공중합체믐 카르복실기가 아크릴계 공중합체의 주쇄에 인접하여, 상기 카르복실기가 피착체와의 상호작용이 용이하지 않고 충분한 내구성 확보 및 가교반응에 참여하기가 어렵다는 단점이 있다.
To improve this, a pressure-sensitive adhesive composition using a different type of curing agent such as a metal chelate-based curing agent and an isocyanate-based curing agent has been proposed for an acrylic copolymer having a carboxyl group (Korean Patent No. 1148141). However, there is a disadvantage that the carboxyl group-containing acrylic copolymer containing carboxyl groups is adjacent to the main chain of the acrylic copolymer and the carboxyl group is not easy to interact with the adherend, ensuring sufficient durability and participating in the crosslinking reaction.

본 발명은 가혹 조건(고온 또는 고온 다습)에서의 점착 내구성을 월등히 향상시켜, 대형 액정표시장치에 적용이 가능한 점착제 조성물을 제공하는데 그 목적이 있다.
An object of the present invention is to provide a pressure-sensitive adhesive composition which is capable of significantly improving adhesion durability under severe conditions (high temperature or high temperature and high humidity) and is applicable to a large-sized liquid crystal display device.

상기 목적을 달성하기 위하여, 본 발명은 히드록시기를 갖는 아크릴계 공중합체, 하기 화학식 1의 산무수물, 및 가교제를 함유하는 점착제 조성물을 제공한다.In order to achieve the above object, the present invention provides a pressure-sensitive adhesive composition containing an acrylic copolymer having a hydroxy group, an acid anhydride represented by the following formula (1), and a crosslinking agent.

Figure pat00001
Figure pat00001

(식 중, R은 탄소수 4 내지 8의 지방족 탄화수소기, 탄소수 4 내지 8의 지환족 탄화수소기 또는 탄소수 6 내지 20의 방향족 탄화수소기임).(Wherein R is an aliphatic hydrocarbon group having 4 to 8 carbon atoms, an alicyclic hydrocarbon group having 4 to 8 carbon atoms, or an aromatic hydrocarbon group having 6 to 20 carbon atoms).

상기 산무수물은 하기 화학식 2 내지 8로 이루어진 군에서 선택된 1종 이상일 수 있다.The acid anhydride may be at least one selected from the group consisting of the following formulas (2) to (8).

Figure pat00002
Figure pat00002

(식 중 R1은 직접결합, CH2, O, S, CO, SO, SO2, C(CH3)2, C(CF3)2, C(CH3)2 또는 Si(CH3)2임)(R 1 in the formula is a direct bond, CH 2, O, S, CO, SO, SO 2, C (CH 3) 2, C (CF 3) 2, C (CH 3) 2 or Si (CH 3) 2 being)

Figure pat00003
Figure pat00003

(식 중 R2은 직접결합, CH2, O, S, CO, SO, SO2, C(CH3)2, C(CF3)2, C(CH3)2 또는 Si(CH3)2임)(Wherein R 2 is a direct bond, CH 2, O, S, CO, SO, SO 2, C (CH 3) 2, C (CF 3) 2, C (CH 3) 2 or Si (CH 3) 2 being)

Figure pat00004
Figure pat00004

Figure pat00005
Figure pat00005

Figure pat00006
Figure pat00006

Figure pat00007
Figure pat00007

Figure pat00008
Figure pat00008

상기 히드록시기를 갖는 아크릴계 공중합체는 탄소수 4-12인 알킬 (메타)아크릴레이트 단량체 및 히드록시기를 갖는 단량체를 함유할 수 있다. The acrylic copolymer having a hydroxy group may contain an alkyl (meth) acrylate monomer having 4 to 12 carbon atoms and a monomer having a hydroxyl group.

상기 히드록시기를 갖는 아크릴계 공중합체는 카르복시기를 갖는 단량체, 아미드기를 갖는 단량체 및 3차 아민기를 갖는 단량체로 이루어진 군에서 선택된 1종 이상의 가교 가능한 관능기를 갖는 중합성 단량체를 추가로 함유할 수 있다.The acrylic copolymer having a hydroxy group may further contain at least one polymerizable monomer having a crosslinkable functional group selected from the group consisting of a monomer having a carboxyl group, a monomer having an amide group, and a monomer having a tertiary amine group.

상기 화학식 1의 산무수물은 히드록시기를 갖는 아크릴계 공중합체의 히드록시기의 관능기수 100에 대하여 10 내지 50관능기수를 갖도록 함유할 수 있다.The acid anhydride of formula (1) may contain the functional group having 10 to 50 functional groups per 100 functional groups of the hydroxyl group of the acrylic copolymer having a hydroxy group.

상기 가교제는 히드록시기를 갖는 아크릴계 공중합체 100중량부에 대하여 0.1 내지 3.0중량부 함유할 수 있다.
The crosslinking agent may be contained in an amount of 0.1 to 3.0 parts by weight based on 100 parts by weight of the acrylic copolymer having a hydroxyl group.

본 발명의 점착제 조성물은 특정의 산무수물이 가교제 역할을 하여 점착력 및 응집력을 향상시켜 가혹 조건(고온 또는 고온 다습)에서의 점착 내구성이 우수한 이점이 있다.
The pressure-sensitive adhesive composition of the present invention has an advantage of excellent adhesion durability under severe conditions (high temperature or high temperature and high humidity) because specific acid anhydrides act as a crosslinking agent to improve the adhesive force and cohesion.

본 발명은 점착 내구성이 우수한 점착제 조성물에 관한 것이다.
The present invention relates to a pressure-sensitive adhesive composition having excellent adhesion durability.

이하 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail.

본 발명의 점착제 조성물은 히드록시기를 갖는 아크릴계 공중합체, 하기 화학식 1의 산무수물, 및 가교제를 함유한다.The pressure-sensitive adhesive composition of the present invention contains an acrylic copolymer having a hydroxy group, an acid anhydride of the following formula (1), and a crosslinking agent.

[화학식 1][Chemical Formula 1]

Figure pat00009
Figure pat00009

(식 중, R은 탄소수 4 내지 8의 지방족 탄화수소기, 탄소수 4 내지 8의 지환족 탄화수소기 또는 탄소수 6 내지 20의 방향족 탄화수소기임)(Wherein R is an aliphatic hydrocarbon group having 4 to 8 carbon atoms, an alicyclic hydrocarbon group having 4 to 8 carbon atoms, or an aromatic hydrocarbon group having 6 to 20 carbon atoms)

본 발명은 상기 화학식 1의 산무수물은 아크릴계 공중합체의 히드록시기와 가교반응을 수행하여, 조성물의 응집력을 증가시켜 내구성을 향상시킨다. 즉, 본 발명은 가교제와, 가교제 역할을 하는 화학식 1의 산무수물이 함께 반응을 수행하므로 종래에 비해 응집력 향상 효과가 증가하게 된다.In the present invention, the acid anhydride of the formula (1) performs a crosslinking reaction with the hydroxy group of the acrylic copolymer to increase the cohesive force of the composition to improve durability. That is, in the present invention, since the crosslinking agent and the acid anhydride of the formula (1) serving as a crosslinking agent perform the reaction together, the effect of improving the cohesive force is increased as compared with the conventional method.

또한 상기 화학식 1의 산무수물은 아크릴공중합체의 히드록시기와 반응하여 생성물로 카르복시산 작용기를 생성하므로, 피착제와의 밀착력을 향상시키는 역할을 한다. 상기 생성된 카르복시산 작용기는 아크릴공중합체의 주쇄로부터 충분히 멀리 떨어져 있고 피착제와의 상호작용이 용이한 입체적 위치를 취하고 있어 내구성 향상에 충분히 기여하게 되는 것으로 예측된다.In addition, the acid anhydride of Formula 1 reacts with the hydroxyl group of the acrylic copolymer to form a carboxylic acid functional group as a product, thereby enhancing adhesion with the adherend. It is predicted that the carboxylic acid functional group generated is far enough away from the main chain of the acrylic copolymer and takes a stereoscopic position where the interaction with the adherend is easy and contributes sufficiently to improvement in durability.

본 발명의 아크릴계 공중합체는 탄소수 4-12인 알킬 (메타)아크릴레이트 단량체 및 히드록시기를 갖는 단량체를 함유하는 것이 바람직하다.The acrylic copolymer of the present invention preferably contains an alkyl (meth) acrylate monomer having 4 to 12 carbon atoms and a monomer having a hydroxy group.

본 발명에 있어서, (메타)아크릴레이트는 아크릴레이트 및 메타크릴레이트를 의미하고, 각 성분의 함량은 고형분을 기준으로 한 것이다.In the present invention, (meth) acrylate means acrylate and methacrylate, and the content of each component is based on the solid content.

상기 탄소수 4-12의 알킬기를 갖는 (메타)아크릴레이트 단량체로는 n-부틸(메타)아크릴레이트, 2-부틸(메타)아크릴레이트, t-부틸(메타)아크릴레이트, 2-에틸헥실(메타)아크릴레이트, 에틸(메타)아크릴레이트, 메틸(메타)아크릴레이트, n-프로필(메타)아크릴레이트, 이소프로필(메타)아크릴레이트, 펜틸(메타)아크릴레이트, n-옥틸(메타)아크릴레이트, 이소옥틸(메타)아크릴레이트, 노닐(메타)아크릴레이트, 데실(메타)아크릴레이트, 라우릴(메타)아크릴레이트 등을 들 수 있으며, 이들 중에서 n-부틸아크릴레이트, 2-에틸헥실아크릴레이트 또는 이들의 혼합물이 바람직하다. 이들은 단독 또는 2종 이상 혼합하여 사용할 수 있다.Examples of the (meth) acrylate monomer having an alkyl group having 4 to 12 carbon atoms include n-butyl (meth) acrylate, 2-butyl (meth) acrylate, (Meth) acrylate, ethyl (meth) acrylate, methyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (Meth) acrylate, n-butyl acrylate, nonyl (meth) acrylate, decyl (meth) acrylate and lauryl Or a mixture thereof. These may be used alone or in combination of two or more.

히드록시기를 갖는 단량체는 2-히드록시에틸(메타)아크릴레이트, 2-히드록시프로필(메타)아크릴레이트, 2-히드록시부틸(메타)아크릴레이트, 4-히드록시부틸(메타)아크릴레이트, 6-히드록시헥실(메타)아크릴레이트, 2-히드록시에틸렌글리콜(메타)아크릴레이트, 2-히드록시프로필렌글리콜(메타)아크릴레이트, 알킬렌기의 탄소수가 2-4인 히드록시알킬렌글리콜(메타)아크릴레이트, 4-히드록시부틸비닐에테르, 5-히드록시펜틸비닐에테르, 6-히드록시헥실비닐에테르, 7-히드록시헵틸비닐에테르, 8-히드록시옥틸비닐에테르, 9-히드록시노닐비닐에테르, 10-히드록시데실비닐에테르, 2-히드록시메틸(메타)아크릴아미드, 2-히드록시에틸(메타)아크릴아미드 및

Figure pat00010
등을 들 수 있다.Examples of the monomer having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 4-hydroxybutyl Hydroxypropyleneglycol (meth) acrylate, hydroxyalkylene glycol (meth) acrylate having 2 to 4 carbon atoms in the alkylene group, and hydroxyalkyl (meth) acrylate having 2 to 4 carbon atoms in the alkylene group. ) Acrylate, 4-hydroxybutyl vinyl ether, 5-hydroxypentyl vinyl ether, 6-hydroxyhexyl vinyl ether, 7-hydroxyheptyl vinyl ether, 8-hydroxyoctyl vinyl ether, Ether, 10-hydroxydecyl vinyl ether, 2-hydroxymethyl (meth) acrylamide, 2-hydroxyethyl (meth)
Figure pat00010
And the like.

이러한 히드록시기를 갖는 단량체는 탄소수 4-12의 알킬기를 갖는 (메타)아크릴레이트 단량체 100중량부에 대하여 0.5 내지 10중량부로 포함되는 것이 바람직하고, 보다 바람직하게는 1 내지 5중량부인 것이 좋다. 함량이 0.5중량부 미만이면 산무수물과 반응이 어려워 응집력과 밀착력 향상이 부족할 수 있고 10중량부를 초과하는 경우에는 가교가 지나치게 진행되어, 응집력의 지나친 향상으로 점착력이 저하되어 내구성이 악화될 수 있다.The monomer having a hydroxy group is preferably contained in an amount of 0.5 to 10 parts by weight, more preferably 1 to 5 parts by weight, based on 100 parts by weight of the (meth) acrylate monomer having an alkyl group having 4-12 carbon atoms. If the amount is less than 0.5 part by weight, the reaction with the acid anhydride is difficult, and the cohesive force and adhesion can not be improved. If the amount is more than 10 parts by weight, the crosslinking proceeds too much and the cohesive force is excessively improved.

본 발명의 아크릴계 공중합체는 가교 가능한 관능기를 갖는 중합성 단량체를 추가로 함유할 수 있다.The acrylic copolymer of the present invention may further contain a polymerizable monomer having a crosslinkable functional group.

가교 가능한 관능기를 갖는 중합성 단량체는 화학 결합에 의해 점착제 조성물의 응집력 또는 점착 강도를 보강하여 내구성과 절단성을 부여할 수 있는 역할을 한다.The polymerizable monomer having a crosslinkable functional group has the function of reinforcing the cohesive force or the adhesive strength of the pressure-sensitive adhesive composition by chemical bonding, thereby imparting durability and cutability.

상기 가교 가능한 관능기를 갖는 중합성 단량체는 예컨대 아미드기를 갖는 단량체, 3차 아민기를 갖는 단량체, 카르복시기를 갖는 단량체 등을 들 수 있으며, 이들은 단독 또는 2종 이상 혼합하여 사용할 수 있다.The polymerizable monomer having a crosslinkable functional group includes, for example, a monomer having an amide group, a monomer having a tertiary amine group, and a monomer having a carboxyl group, and these may be used alone or in combination of two or more.

아미드기를 갖는 단량체로는 (메타)아크릴아미드, N-이소프로필아크릴아미드, N-3차부틸아크릴아미드, 3-히드록시프로필(메타)아크릴아미드, 4-히드록시부틸(메타)아크릴아미드, 6-히드록시헥실(메타)아크릴아미드, 8-히드록시옥틸(메타)아크릴아미드, 및 2-히드록시에틸헥실(메타)아크릴아미드 등을 들 수 있으며, 이들 중에서 (메타)아크릴아미드가 바람직하다. Examples of the monomer having an amide group include (meth) acrylamide, N-isopropyl acrylamide, N-tertiary butyl acrylamide, 3-hydroxypropyl (meth) acrylamide, 4-hydroxybutyl (Meth) acrylamide, 8-hydroxyoctyl (meth) acrylamide, and 2-hydroxyethylhexyl (meth) acrylamide. Of these, (meth) acrylamide is preferable.

3차 아민기를 갖는 단량체로는 N,N-(디메틸아미노)에틸(메타)아크릴레이트, N,N-(디에틸아미노)에틸(메타)아크릴레이트, 및 N,N-(디메틸아미노)프로필(메타)아크릴레이트 등을 들 수 있다. Examples of the monomer having a tertiary amine group include N, N- (dimethylamino) ethyl (meth) acrylate, N, N- (diethylamino) ethyl (meth) Methacrylate, and the like.

카르복시기를 갖는 단량체로는 (메타)아크릴산, 크로톤산 등의 1가산; 말레인산, 이타콘산, 푸마르산 등의 2가산 및 이들의 모노알킬에스테르; 3-(메타)아크릴로일프로피온산; 알킬기의 탄소수가 2-3인 2-히드록시알킬(메타)아크릴레이트의 무수호박산 개환 부가체, 알킬렌기의 탄소수가 2-4인 히드록시알킬렌글리콜(메타)아크릴레이트의 무수 호박산 개환 부가체, 알킬기의 탄소수가 2-3인 2-히드록시알킬(메타)아크릴레이트의 카프로락톤 부가체에 무수 호박산을 개환 부가시킨 화합물 등을 들 수 있으며, 이들 중에서 (메타)아크릴산이 바람직하다. Examples of the monomer having a carboxyl group include monovalent acids such as (meth) acrylic acid and crotonic acid; Dicarboxylic acids such as maleic acid, itaconic acid, and fumaric acid, and monoalkyl esters thereof; 3- (meth) acryloylpropionic acid; A succinic anhydride ring-opening addition adduct of 2-hydroxyalkyl (meth) acrylate in which the alkyl group has 2 to 4 carbon atoms, anhydrous succinic ring opening adduct of a hydroxyalkylene glycol (meth) acrylate having 2 to 4 carbon atoms in the alkylene group , Compounds obtained by ring-opening addition of succinic anhydride to caprolactone adducts of 2-hydroxyalkyl (meth) acrylates whose alkyl groups have 2-3 carbon atoms, and among these, (meth) acrylic acid is preferable.

중합성 단량체는 탄소수 4-12의 알킬기를 갖는 (메타)아크릴레이트 단량체 100중량부에 대하여 0.05 내지 10중량부로 포함되는 것이 바람직하고, 보다 바람직하게는 0.1 내지 8중량부인 것이 좋다. 함량이 0.05중량부 미만인 경우 점착제의 응집력이 작아지게 되어 내구성이 저하될 수 있으며, 10중량부 초과인 경우 높은 겔분율에 의해 점착력이 떨어지고 내구성에 문제를 야기할 수 있다.
The polymerizable monomer is preferably contained in an amount of 0.05 to 10 parts by weight, more preferably 0.1 to 8 parts by weight, based on 100 parts by weight of the (meta) acrylate monomer having an alkyl group having 4 to 12 carbon atoms. When the content is less than 0.05 part by weight, the cohesive force of the pressure-sensitive adhesive becomes small and durability may be deteriorated. When the content is more than 10 parts by weight, a high gel fraction may lower the adhesive strength and cause durability problems.

상기 화학식 1의 산무수물은 아크릴계 공중합체의 히드록시기와 가교반응을 수행하여, 응집력을 향상시킴과 동시에 생성되는 카르복실기가 피착제와의 밀착력을 증가시켜 내구성을 향상시키는 역할을 한다.The acid anhydride of formula (1) performs a crosslinking reaction with the hydroxy group of the acrylic copolymer to improve cohesion and increase the adhesion of the carboxyl group to the adherend to improve durability.

상기 산무수물은 화학식 1에서 R이 탄소수 4 내지 8의 지방족 탄화수소기 또는 탄소수 6 내지 20의 방향족 탄화수소기인 것이 바람직하고, 보다 바람직하기로는 하기 화학식 2 내지 8로 이루어진 군에서 선택된 1종 이상이 좋다.The acid anhydride is preferably an aliphatic hydrocarbon group having 4 to 8 carbon atoms or an aromatic hydrocarbon group having 6 to 20 carbon atoms, and more preferably at least one selected from the group consisting of the following formulas (2) to (8).

[화학식 2](2)

Figure pat00011
Figure pat00011

(식 중 R1은 직접결합, CH2, O, S, CO, SO, SO2, C(CH3)2, C(CF3)2, C(CH3)2 또는 Si(CH3)2임)(R 1 in the formula is a direct bond, CH 2, O, S, CO, SO, SO 2, C (CH 3) 2, C (CF 3) 2, C (CH 3) 2 or Si (CH 3) 2 being)

[화학식 3](3)

Figure pat00012
Figure pat00012

(식 중 R2은 직접결합, CH2, O, S, CO, SO, SO2, C(CH3)2, C(CF3)2, C(CH3)2 또는 Si(CH3)2임)(Wherein R 2 is a direct bond, CH 2, O, S, CO, SO, SO 2, C (CH 3) 2, C (CF 3) 2, C (CH 3) 2 or Si (CH 3) 2 being)

[화학식 4][Chemical Formula 4]

Figure pat00013
Figure pat00013

[화학식 5][Chemical Formula 5]

Figure pat00014
Figure pat00014

[화학식 6][Chemical Formula 6]

Figure pat00015
Figure pat00015

[화학식 7](7)

Figure pat00016
Figure pat00016

[화학식 8][Chemical Formula 8]

Figure pat00017
Figure pat00017

이러한 산무수물은 히드록시기를 갖는 아크릴계 공중합체의 히드록시기의 관능기수 100에 대하여 10 내지 50관능기수, 바람직하기로는 10 내지 30관능기수를 갖도록 함유할 수 있다. 관능기수가 10 미만이면 응집력과 밀착력의 향상 효과가 부족할 수 있고 50관능기수를 초과하는 경우에는 미반응 산무수물이 블리드 아웃(bleed-out)되어 내구성이 저하될 수 있다.The acid anhydride may be contained so as to have 10 to 50 functional groups, preferably 10 to 30 functional groups per 100 functional groups of the hydroxyl group of the acrylic copolymer having a hydroxy group. If the number of functional groups is less than 10, the effect of improving cohesion and adhesion may be insufficient. If the number of functional groups exceeds 50, unreacted acid anhydride may bleed out and durability may be deteriorated.

상기 산무수물의 관능기수 범위를 함량으로 환산하는 경우, 사용된 히드록시기를 갖는 아크릴계 공중합체 및 산무수물의 종류에 따라 달라지는 바, 이를 고려하여 적절히 사용하는 것이 바람직하다.When the functional group number of the acid anhydride is converted into the content, it is preferable to use it in consideration of the kind of the acrylic copolymer and the acid anhydride having the hydroxyl group used.

바람직하기로는 히드록시기를 갖는 아크릴계 공중합체 100중량부에 대하여 0.2 내지 1.0 중량부 범위일 수 있다.
Preferably from 0.2 to 1.0 part by weight based on 100 parts by weight of the acrylic copolymer having a hydroxy group.

가교제는 공중합체를 적절히 가교함으로써 점착제의 응집력을 강화하기 위한 성분으로서, 그 종류는 특별히 한정되지 않는다. 예컨대, 이소시아네이트계 화합물, 에폭시계 화합물 등을 들 수 있으며, 이들은 단독 또는 2종 이상 혼합하여 사용할 수 있다.The crosslinking agent is a component for reinforcing the cohesive force of the pressure-sensitive adhesive by properly crosslinking the copolymer, and the kind thereof is not particularly limited. Examples thereof include isocyanate compounds and epoxy compounds, which may be used alone or in combination of two or more.

이소시아네이트계 화합물로는 톨릴렌디이소시아네이트, 자일렌디이소시아네이트, 2,4-디페닐메탄디이소시아네트, 4,4-디페닐메탄디이소시아네트, 헥사메틸렌디이소시아네이트, 이소포론디이소시아네이트, 테트라메틸자일렌디이소시아네이트, 나프탈렌디이소시아네이트 등의 디이소시아네이트 화합물; 트리메틸올프로판 등의 다가 알콜계 화합물 1몰에 디이소시아네이트 화합물 3몰을 반응시킨 부가체, 디이소시아네이트 화합물 3몰을 자기 축합시킨 이소시아누레이트체, 디이소시아네이트 화합물 3몰 중 2몰로부터 얻어지는 디이소시아네이트 우레아에 나머지 1몰의 디이소시아네이트가 축합된 뷰렛체, 트리페닐메탄트리이소시아네이트, 메틸렌비스트리이소시아네이트 등의 3개의 관능기를 함유하는 다관능 이소시아네이트 화합물 등을 들 수 있다.Examples of the isocyanate compound include tolylene diisocyanate, xylene diisocyanate, 2,4-diphenylmethane diisocyanate, 4,4-diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, tetramethyl xylene diisocyanate , Diisocyanate compounds such as naphthalene diisocyanate; An adduct obtained by reacting 3 moles of a diisocyanate compound with 1 mole of a polyhydric alcohol compound such as trimethylolpropane, an isocyanurate compound in which 3 moles of a diisocyanate compound is self-condensed, a diisocyanate obtained from 2 moles of 3 moles of a diisocyanate compound And multifunctional isocyanate compounds containing three functional groups such as burette, triphenylmethane triisocyanate and methylene bistriisocyanate in which the remaining one mole of diisocyanate is condensed in urea.

에폭시계 화합물로는 에틸렌글리콜디글리시딜에테르, 디에틸렌글리콜디글리시딜에테르, 폴리에틸렌글리콜디글리시딜에테르, 프로필렌글리콜디글리시딜에테르, 트리프로필렌글리콜디글리시딜에테르, 폴리프로필렌글리콜디글리시딜에테르, 네오펜틸글리콜디글리시딜에테르, 1,6-헥산디올디글리시딜에테르, 폴리테트라메틸렌글리콜디글리시딜에테르, 글리세롤디글리시딜에테르, 글리세롤트리글리시딜에테르, 디글리세롤폴리글리시딜에테르, 폴리글리세롤폴리글리시딜에테르, 레졸신디글리시딜에테르, 2,2-디브로모네오펜틸글리콜디글리시딜에테르, 트리메틸올프로판트리글리시딜에테르, 펜타에리트리톨폴리글리시딜에테르, 소르비톨폴리글리시딜에테르, 아디핀산디글리시딜에스테르, 프탈산디글리시딜에스테르, 트리스(글리시딜)이소시아누레이트, 트리스(글리시독시에틸)이소시아누레이트, 1,3-비스(N,N-글리시딜아미노메틸)시클로헥산, N,N,N',N'-테트라글리시딜-m-자일릴렌디아민 등을 들 수 있다.Examples of the epoxy compound include ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, tripropylene glycol diglycidyl ether, polypropylene glycol Hexanediol diglycidyl ether, polytetramethylene glycol diglycidyl ether, glycerol diglycidyl ether, glycerol triglycidyl ether, glycerol diglycidyl ether, glycerol diglycidyl ether, Diglycerol polyglycidyl ether, polyglycerol polyglycidyl ether, resorcinol diglycidyl ether, 2,2-dibromoneopentyl glycol diglycidyl ether, trimethylol propane triglycidyl ether, pentaerythritol Polyglycidyl ether, sorbitol polyglycidyl ether, adipic acid diglycidyl ester, phthalic acid diglycidyl ester, tris (glycidyl) isocyanurate N, N ', N'-tetraglycidyl-m-glycidoxyethyl isocyanurate, 1,3-bis (N, N-glycidylaminomethyl) cyclohexane, Xylylenediamine, and the like.

또한, 이소시아네이트계 화합물, 에폭시계 화합물과 함께 멜라민계 화합물을 단독 또는 2종 이상 혼합하여 추가로 사용할 수 있다.In addition, an isocyanate compound, an epoxy compound, and a melamine compound may be used alone or in admixture of two or more.

멜리민계 화합물로는 헥사메틸올멜라민, 헥사메톡시메틸멜라민, 헥사부톡시메틸멜라민 등을 들 수 있다.Examples of the melamine-based compound include hexamethylol melamine, hexamethoxymethyl melamine, and hexabutoxymethyl melamine.

가교제는 아크릴계 공중합체 100중량부에 대하여 0.1 내지 3중량부로 포함되는 것이 바람직하고, 보다 바람직하게는 0.1 내지 1중량부인 것이 좋다. 함량이 0.1중량부 미만인 경우 부족한 가교도로 인해 응집력이 작아지게 되어 들뜸과 같은 내구성 저하가 유발되고 절단성을 해칠 수 있으며, 3중량부 초과인 경우 과다 가교반응에 의해 점착력이 저하되어 내구성이 악화되거나, 잔류응력 완화에 문제가 발생할 수 있다.The crosslinking agent is preferably contained in an amount of 0.1 to 3 parts by weight, more preferably 0.1 to 1 part by weight based on 100 parts by weight of the acrylic copolymer. When the content is less than 0.1 parts by weight, the cohesive force is reduced due to insufficient crosslinking, resulting in deterioration of durability such as lifting and deterioration of cutability. If the content is more than 3 parts by weight, the adhesion is deteriorated due to excessive crosslinking reaction, , There may be a problem in relaxation of residual stress.

본 발명은 상기 산무수물이 가교제의 역할을 수행하므로, 상기 가교제는 종래에 비해 소량 사용해도 무방하다.Since the acid anhydride plays a role of a crosslinking agent in the present invention, the crosslinking agent may be used in a smaller amount than in the prior art.

상기와 같은 성분 이외에, 점착제 조성물은 용도에 따라 요구되는 점착력, 응집력, 점성, 탄성률, 유리전이온도 등을 조절하기 위하여, 실란커플링제, 점착성 부여 수지, 산화방지제, 레벨링제, 표면윤활제, 염료, 안료, 소포제, 충전제, 광안정제 등의 첨가제를 더 함유할 수 있다. In addition to the above components, the pressure-sensitive adhesive composition may further contain various additives such as a silane coupling agent, a tackifier resin, an antioxidant, a leveling agent, a surface lubricant, a dye, an antioxidant, and the like in order to control the adhesion, cohesion, viscosity, A pigment, a defoaming agent, a filler, a light stabilizer, and the like.

이중 실란커플링제는 점착제와 기재와의 밀착력을 향상시키는 역할을하므로 이를 함유하는 것이 바람직하다. 예컨대 비닐클로로실란, 비닐트리메톡시실란, 비닐트리에톡시실란, 2-(3,4-에폭시시클로헥실)에틸트리메톡시실란, 3-글리시독시프로필트리메톡시실란, 3-글리시독시프로필메틸디에톡시실란, 3-글리시독시프로필디에톡시실란, 3-글리시독시프로필트리에톡시실란, p-스티릴트리메톡시실란, 3-메타크릴옥시프로필트리에톡시실란, 3-메타크릴옥시프로필트리메톡시실란, 3-메타크릴옥시프로필메틸디메톡시실란, 3-메타크릴옥시프로필메틸디에톡시실란, 3-아크릴옥시프로필트리메톡시실란, N-2-(아미노에틸)-3-아미노프로필메틸디메톡시실란, N-2-(아미노에틸)-3-아미노프로필트리메톡시실란, N-2-(아미노에틸)-3-아미노프로필메틸트리에톡시실란, 3-아미노프로필트리메톡시실란, 3-아미노프로필트리에톡시실란, 3-트리에톡시실릴-N-(1,3-디메틸부틸리덴)프로필아민, N-페닐-3-아미노프로필트리메톡시실란, 3-클로로프로필트리메톡시실란, 3-머캅토프로필메틸디메톡시실란, 3-머캅토프로필트리메톡시실란, 비스(트리에톡시실릴프로필)테트라설파이드, 3-이소시아네이트프로필트리에톡시실란 등을 들 수 있다. 이들은 단독 또는 2종 이상 혼합하여 사용할 수 있다.The double silane coupling agent serves to improve the adhesion between the pressure-sensitive adhesive and the substrate, and therefore, the double silane coupling agent is preferable. Examples of the silane coupling agents include vinylchlorosilane, vinyltrimethoxysilane, vinyltriethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3- 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-methacryloxypropyltriethoxysilane, 3- 3-methacryloxypropylmethyldiethoxysilane, 3-acryloxypropyltrimethoxysilane, N-2- (aminoethyl) -3, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, Aminopropyltrimethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, N-2- (aminoethyl) Methoxysilane, 3-aminopropyltriethoxysilane, 3-triethoxysilyl-N- (1,3-dimethylbutylidene) propyl 3-aminopropyltrimethoxysilane, 3-chloropropyltrimethoxysilane, 3-mercaptopropylmethyldimethoxysilane, 3-mercaptopropyltrimethoxysilane, bis (triethoxysilyl Propyl) tetrasulfide, 3-isocyanatepropyltriethoxysilane, and the like. These may be used alone or in combination of two or more.

실란커플링제는 고형분 함량을 기준으로 아크릴계 공중합체 100중량부에 대하여 0 내지 10중량부로 포함될 수 있으며, 바람직하게 0.005 내지 5중량부로 포함되는 것이 좋다. 함량이 10중량부 초과인 경우 내구성이 저하될 수 있다.The silane coupling agent may be contained in an amount of 0 to 10 parts by weight, preferably 0.005 to 5 parts by weight, based on 100 parts by weight of the acrylic copolymer based on the solid content. If the content exceeds 10 parts by weight, the durability may be lowered.

본 발명의 점착제 조성물은 특히 액정셀과의 접합을 위한 편광판용 점착제, 표면보호필름용 점착제로 사용할 수 있다. 또한, 보호필름, 반사시트, 구조용 점착시트, 사진용 점착시트, 차선표시용 점착시트, 광학용 점착제품, 전자부품용 점착제뿐만 아니라 일반 상업용 점착시트제품으로도 사용 가능하다.
The pressure-sensitive adhesive composition of the present invention can be used particularly as a pressure-sensitive adhesive for a polarizing plate or a pressure-sensitive adhesive for a surface protective film for bonding with a liquid crystal cell. It can be used not only 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 electronic component adhesive, but also a general commercial adhesive sheet product.

이하, 본 발명의 이해를 돕기 위하여 바람직한 실시예를 제시하나, 하기 실시예는 본 발명을 예시하는 것일 뿐 본 발명의 범주 및 기술사상 범위 내에서 다양한 변경 및 수정이 가능함은 당업자에게 있어서 명백한 것이며, 이러한 변형 및 수정이 첨부된 특허청구범위에 속하는 것도 당연한 것이다.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Such variations and modifications are intended to be within the scope of the appended claims.

제조예Manufacturing example : 아크릴계 공중합체: Acrylic copolymer

제조예Manufacturing example 1 One

질소가스가 환류되고 온도조절이 용이하도록 냉각장치를 설치한 1 L의 반응기에 n-부틸아크릴레이트(BA) 90중량부, 메타크릴레이트(MA) 7중량부, 2-히드록시에틸아크릴레이트 2중량부 및 디메틸아미노에틸아크릴레이트 1중량부로 이루어진 단량체 혼합물을 투입한 후, 용제로 에틸아세테이트 100중량부를 투입하였다. 그 다음 산소를 제거하기 위하여 질소가스를 1시간 동안 퍼징한 후, 62℃로 유지하였다. 상기 혼합물을 균일하게 한 후, 반응개시제로 아조비스이소부티로니트릴(AIBN) 0.07중량부를 투입하고, 6시간 동안 반응시켜 중량평균분자량이 100만인 아크릴계 공중합체를 제조하였다.
90 parts by weight of n-butyl acrylate (BA), 7 parts by weight of methacrylate (MA), 2 parts by weight of 2-hydroxyethyl acrylate (2 parts by weight) were added to a 1 L reactor equipped with a cooling device, And 1 part by weight of dimethylaminoethyl acrylate were put in a flask, and 100 parts by weight of ethyl acetate was added as a solvent. Nitrogen gas was then purged for 1 hour to remove oxygen and then maintained at 62 ° C. After the mixture was homogenized, 0.07 part by weight of azobisisobutyronitrile (AIBN) was added as a reaction initiator and reacted for 6 hours to prepare an acrylic copolymer having a weight average molecular weight of 1,000,000.

제조예Manufacturing example 2 2

상기 제조예 1과 동일하게 실시하되, 2-히드록시에틸아크릴레이트 대신에 4-히드록시부틸아크릴레이트를 사용하여 아크릴계 공중합체를 제조하였다.
The procedure of Preparation Example 1 was repeated except that 4-hydroxybutyl acrylate was used instead of 2-hydroxyethyl acrylate to prepare an acrylic copolymer.

제조예Manufacturing example 3 3

상기 제조예 1과 동일하게 실시하되, 2-히드록시에틸아크릴레이트 대신에 히드록시에틸아크릴아미드를 사용하여 아크릴계 공중합체를 제조하였다.
The procedure of Preparation Example 1 was repeated except that hydroxyethyl acrylamide was used instead of 2-hydroxyethyl acrylate to prepare an acrylic copolymer.

제조예Manufacturing example 4 4

상기 제조예 1과 동일하게 실시하되, 2-히드록시에틸아크릴레이트 대신에

Figure pat00018
(화학식 9)를 사용하여 아크릴계 공중합체를 제조하였다.
The procedure of Preparation Example 1 was repeated except that 2-hydroxyethyl acrylate was used instead of 2-
Figure pat00018
(Formula 9) was used to prepare an acrylic copolymer.

제조예Manufacturing example 5 5

상기 제조예 1과 동일하게 실시하되, n-부틸아크릴레이트(BA) 87중량부, 메타크릴레이트(MA) 7중량부, 2-히드록시에틸아크릴레이트 5중량부 및 디메틸아미노에틸아크릴레이트 1중량부로 이루어진 단량체를 사용하여 아크릴계 공중합체를 제조하였다.
Except that 87 parts by weight of n-butyl acrylate (BA), 7 parts by weight of methacrylate (MA), 5 parts by weight of 2-hydroxyethyl acrylate, and 1 part by weight of dimethylaminoethyl acrylate An acrylic copolymer was prepared.

제조예Manufacturing example 6 6

상기 제조예 1과 동일하게 실시하되, n-부틸아크릴레이트(BA) 82중량부, 메타크릴레이트(MA) 7중량부, 2-히드록시에틸아크릴레이트 10중량부 및 디메틸아미노에틸아크릴레이트 1중량부로 이루어진 단량체를 사용하여 아크릴계 공중합체를 제조하였다.
Except that 82 parts by weight of n-butyl acrylate (BA), 7 parts by weight of methacrylate (MA), 10 parts by weight of 2-hydroxyethyl acrylate and 1 part by weight of dimethylaminoethyl acrylate An acrylic copolymer was prepared.

제조예Manufacturing example 7 7

상기 제조예 1과 동일하게 실시하되, n-부틸아크릴레이트(BA) 90중량부, 메타크릴레이트(MA) 8중량부, 2-히드록시에틸아크릴레이트 2중량부로 이루어진 단량체를 사용하여 아크릴계 공중합체를 제조하였다.
Except that 90 parts by weight of n-butyl acrylate (BA), 8 parts by weight of methacrylate (MA) and 2 parts by weight of 2-hydroxyethyl acrylate were used in the same manner as in Preparation Example 1 to prepare an acrylic copolymer .

비교 compare 제조예Manufacturing example 1 One

상기 제조예 1과 동일하게 실시하되, 2-히드록시에틸아크릴레이트 대신에 아크릴산을 사용하여 아크릴계 공중합체를 제조하였다
Acrylic acid copolymer was prepared in the same manner as in Preparation Example 1 except that acrylic acid was used instead of 2-hydroxyethyl acrylate

실시예Example 1-12 및  1-12 and 비교예Comparative Example 1-3 1-3

1)점착제 조성물1) Pressure-sensitive adhesive composition

상기 제조예 1의 아크릴계 공중합체, 산무수물, 가교제 및 실란커플링제를 하기 표 2의 조성으로 혼합한 후, 코팅성을 고려하여 28중량%의 농도로 희석하여 점착제 조성물을 제조하였다.The acrylic copolymer, acid anhydride, crosslinking agent and silane coupling agent of Preparation Example 1 were mixed in the composition shown in Table 2 below and then diluted to a concentration of 28% by weight in consideration of coating property to prepare a pressure-sensitive adhesive composition.

구분
(중량부)
division
(Parts by weight)
아크릴계 공중합체
(100중량부)
Acrylic copolymer
(100 parts by weight)
가교제Cross-linking agent 산무수물Acid anhydride 실란
커플링제
Silane
Coupling agent
A-1A-1 A-2A-2 A-3A-3 A-4A-4 B-1B-1 B-2B-2 B-3B-3 B-4B-4 실시예1Example 1 제조예1Production Example 1 0.20.2 -- -- -- 0.50.5 -- -- -- 0.50.5 실시예2Example 2 제조예1Production Example 1 0.20.2 -- -- -- -- 0.50.5 -- -- 0.50.5 실시예3Example 3 제조예1Production Example 1 0.20.2 -- -- -- -- -- 0.50.5 -- 0.50.5 실시예4Example 4 제조예1Production Example 1 0.20.2 -- -- -- -- -- -- 0.50.5 0.50.5 실시예5Example 5 제조예1Production Example 1 -- 0.20.2 -- -- 0.50.5 -- -- -- 0.50.5 실시예6Example 6 제조예1Production Example 1 -- -- 0.20.2 -- 0.50.5 -- -- -- 0.50.5 실시예7Example 7 제조예1Production Example 1 -- -- -- 0.20.2 0.50.5 -- -- -- 0.50.5 실시예8Example 8 제조예2Production Example 2 0.20.2 -- -- -- 0.50.5 -- -- -- 0.50.5 실시예9Example 9 제조예3Production Example 3 0.20.2 -- -- -- 0.50.5 -- -- -- 0.50.5 실시예10Example 10 제조예4Production Example 4 0.20.2 -- -- -- 0.50.5 -- -- -- 0.50.5 실시예11Example 11 제조예5Production Example 5 0.20.2 -- -- -- 0.50.5 -- -- -- 0.50.5 실시예12Example 12 제조예6Production Example 6 0.20.2 -- -- -- 0.50.5 -- -- -- 0.50.5 실시예13Example 13 제조예1Production Example 1 0.20.2 -- -- -- 0.10.1 -- -- -- 0.50.5 실시예14Example 14 제조예1Production Example 1 0.20.2 -- -- -- 1.51.5 -- -- -- 0.50.5 실시예15Example 15 제조예7Production Example 7 0.20.2 -- -- -- 0.50.5 -- -- -- 0.50.5 비교예1Comparative Example 1 비교제조예1Comparative Preparation Example 1 0.20.2 -- -- -- 0.50.5 -- -- -- 0.50.5 비교예2Comparative Example 2 제조예1Production Example 1 0.20.2 -- -- -- -- -- -- -- 0.50.5 비교예3Comparative Example 3 제조예2Production Example 2 -- -- -- -- 0.50.5 -- -- -- 0.50.5 A-1: 코로네이트-L(TDI계 가교제, CORONATE-L, 일본우레탄공업)
A-2: TDI의 이소시아누레아트 (일본우레탄사)
A-3: 코로네이트-HXR (HDI의 이소아누레이트, 일본우레탄사)
A-4: 다케네이트-110N (XDI계 가교제, TAKENATE-110N 미쯔이화학
B-1:

Figure pat00019

B-2:
Figure pat00020

B-3:
Figure pat00021

B-4:
Figure pat00022

실란커플링제: 글리시독시프로필 트리메톡시실란 (신에츠사, KBM403제품) A-1: Coronate-L (TDI crosslinking agent, CORONATE-L, Japan Urethane Industry)
A-2: Isocyanate art of TDI (Urethane Japan)
A-3: Coronate-HXR (isocyanurate of HDI, Urethane Company of Japan)
A-4: Takenate-110N (XDI crosslinking agent, TAKENATE-110N Mitsui Chemicals
B-1:
Figure pat00019

B-2:
Figure pat00020

B-3:
Figure pat00021

B-4:
Figure pat00022

Silane coupling agent: glycidoxypropyltrimethoxysilane (Shin-Etsu, KBM403)

2)점착제 부착 편광판2) Polarizer with adhesive

1)에서 제조된 점착제 조성물을 실리콘 이형제가 코팅된 이형필름 상에 경화 후 두께가 25㎛가 되도록 도포하고 100℃에서 각각 1분, 5분 및 10분 동안 건조시켜 점착층을 형성하였다. 1) was cured on a releasing film coated with a silicone release agent, and then coated to a thickness of 25 占 퐉 and dried at 100 占 폚 for 1 minute, 5 minutes and 10 minutes to form an adhesive layer.

상기 점착층 위에, 편광자의 양면에 트리아세틸셀룰로오스 보호필름이 접합된 편광판을 라미네이션하여 점착제 부착 편광판을 제조하였다. 이때, 보호필름면과 점착층이 접촉하도록 적층하였다. 상기 제조된 편광판을 23℃, 60%RH의 조건 하에서 양생 기간 동안 보관하였다.
A polarizing plate having a triacetyl cellulose protective film bonded to both sides of the polarizer was laminated on the pressure-sensitive adhesive layer to prepare a polarizing plate with a pressure-sensitive adhesive. At this time, the protective film surface and the adhesive layer were laminated so as to be in contact with each other. The prepared polarizing plate was stored for a curing period under the conditions of 23 캜 and 60% RH.

시험예Test Example

상기 실시예 및 비교예에서 제조된 점착제 부착 편광판의 물성을 하기의 방법으로 측정하고, 그 결과를 하기 표 2에 나타내었다.
The physical properties of the polarizer with a pressure-sensitive adhesive prepared in the above Examples and Comparative Examples were measured by the following methods, and the results are shown in Table 2 below.

내구성(내열, Durability (heat resistance, 내습열Wet heat ))

제조된 점착제 부착 편광판을 90㎜×170㎜ 크기로 절단하고 이형필름을 박리한 후 유리 기판(110㎜×190㎜×0.7㎜)의 양면에 광학 흡수축이 직교하도록 부착하여 시편을 제작하였다. 이때, 가해진 압력은 5㎏/㎠이며 기포나 이물이 생기지 않도록 크린룸 작업을 하였다. 내열 특성은 80℃의 온도에서 1000시간 동안 방치한 후에 기포나 박리의 발생 여부를 관찰하였고, 내습열 특성은 60℃의 온도 및 90%RH의 조건 하에서 1000시간 방치한 후에 기포나 박리의 발생 여부를 관찰하였다. 이때, 시편의 상태를 평가하기 직전에 상온에서 24시간 방치한 후 관찰하였다.The prepared polarizer with a pressure-sensitive adhesive was cut into a size of 90 mm × 170 mm, and the release film was peeled off. Then, the optical absorption axis was perpendicularly attached to both sides of the glass substrate (110 mm × 190 mm × 0.7 mm). At this time, the applied pressure was 5 kg / cm < 2 >, and the clean room operation was performed so that bubbles or foreign matter would not occur. The heat resistance characteristics were evaluated by observing the occurrence of bubbles or peeling after being left at a temperature of 80 ° C. for 1000 hours. The moisture resistance characteristics were evaluated by observing the occurrence of bubbles or peeling after being left at a temperature of 60 ° C. and 90% RH for 1000 hours Respectively. At this time, the sample was allowed to stand at room temperature for 24 hours immediately before evaluating the state of the specimen.

<평가 기준><Evaluation Criteria>

ⓞ: 기포나 박리 없음.Ⓞ: No bubbles or peeling.

○: 기포나 박리 < 5개○: Bubbles or peeling <5

△: 5개 ≤ 기포나 박리 < 10개?: 5 pieces? Bubbles or peeling <10 pieces

×: 10개 ≤ 기포나 박리X: 10 pieces &lt; bubble &

××: 전면에 기포나 박리××: Bubbles or peeling in the front

구분division 내구성durability 내열Heat resistance 내습열Wet heat 실시예1Example 1 실시예2Example 2 실시예3Example 3 실시예4Example 4 실시예5Example 5 실시예6Example 6 실시예7Example 7 실시예8Example 8 실시예9Example 9 실시예10Example 10 실시예11Example 11 실시예12Example 12 실시예13Example 13 실시예14Example 14 실시예15Example 15 비교예1Comparative Example 1 ×× 비교예2Comparative Example 2 비교예3Comparative Example 3 ×× ××

상기 표 2와 같이, 본 발명에 따라 히드록시기를 갖는 아크릴계 공중합체, 상기 화학식 1의 산무수물, 및 가교제를 함유하는 실시예 1 내지 15의 점착제 조성물은 비교예 1 내지 3에 비해 점착 내구성이 우수하다는 것을 확인할 수 있었다.
As shown in Table 2, the pressure-sensitive adhesive compositions of Examples 1 to 15 containing an acrylic copolymer having a hydroxyl group, an acid anhydride of the formula 1 and a crosslinking agent according to the present invention had better adhesion durability than Comparative Examples 1 to 3 .

Claims (6)

히드록시기를 갖는 아크릴계 공중합체, 하기 화학식 1의 산무수물, 및 가교제를 함유하는 점착제 조성물:
[화학식 1]
Figure pat00023

(식 중, R은 탄소수 4 내지 8의 지방족 탄화수소기, 탄소수 4 내지 8의 지환족 탄화수소기 또는 탄소수 6 내지 20의 방향족 탄화수소기임).
A pressure-sensitive adhesive composition comprising an acrylic copolymer having a hydroxy group, an acid anhydride of the following formula (1), and a crosslinking agent:
[Chemical Formula 1]
Figure pat00023

(Wherein R is an aliphatic hydrocarbon group having 4 to 8 carbon atoms, an alicyclic hydrocarbon group having 4 to 8 carbon atoms, or an aromatic hydrocarbon group having 6 to 20 carbon atoms).
청구항 1에 있어서, 상기 산무수물은 하기 화학식 2 내지 8로 이루어진 군에서 선택된 1종 이상인 점착제 조성물:
[화학식 2]
Figure pat00024

(식 중 R1은 직접결합, CH2, O, S, CO, SO, SO2, C(CH3)2, C(CF3)2, C(CH3)2 또는 Si(CH3)2임)
[화학식 3]
Figure pat00025

(식 중 R2은 직접결합, CH2, O, S, CO, SO, SO2, C(CH3)2, C(CF3)2, C(CH3)2 또는 Si(CH3)2임)
[화학식 4]
Figure pat00026

[화학식 5]
Figure pat00027

[화학식 6]
Figure pat00028

[화학식 7]
Figure pat00029

[화학식 8]
Figure pat00030

The pressure-sensitive adhesive composition according to claim 1, wherein the acid anhydride is at least one selected from the group consisting of the following general formulas (2) to (8)
(2)
Figure pat00024

(R 1 in the formula is a direct bond, CH 2, O, S, CO, SO, SO 2, C (CH 3) 2, C (CF 3) 2, C (CH 3) 2 or Si (CH 3) 2 being)
(3)
Figure pat00025

(Wherein R 2 is a direct bond, CH 2, O, S, CO, SO, SO 2, C (CH 3) 2, C (CF 3) 2, C (CH 3) 2 or Si (CH 3) 2 being)
[Chemical Formula 4]
Figure pat00026

[Chemical Formula 5]
Figure pat00027

[Chemical Formula 6]
Figure pat00028

(7)
Figure pat00029

[Chemical Formula 8]
Figure pat00030

청구항 1에 있어서, 상기 히드록시기를 갖는 아크릴계 공중합체는 탄소수 4-12인 알킬 (메타)아크릴레이트 단량체 및 히드록시기를 갖는 단량체를 함유하는 것인 점착제 조성물.
The pressure-sensitive adhesive composition according to claim 1, wherein the acrylic copolymer having a hydroxy group contains an alkyl (meth) acrylate monomer having 4 to 12 carbon atoms and a monomer having a hydroxyl group.
청구항 3에 있어서, 상기 히드록시기를 갖는 아크릴계 공중합체는 카르복시기를 갖는 단량체, 아미드기를 갖는 단량체 및 3차 아민기를 갖는 단량체로 이루어진 군에서 선택된 1종 이상의 가교 가능한 관능기를 갖는 중합성 단량체를 추가로 함유한 것인 점착제 조성물.
The acrylic copolymer according to claim 3, wherein the acrylic copolymer having a hydroxyl group further comprises a polymerizable monomer having at least one crosslinkable functional group selected from the group consisting of a monomer having a carboxyl group, a monomer having an amide group and a monomer having a tertiary amine group Lt; / RTI &gt;
청구항 1에 있어서, 상기 화학식 1의 산무수물은 히드록시기를 갖는 아크릴계 공중합체의 히드록시기의 관능기수 100에 대하여 10 내지 50관능기수를 갖도록 함유한 것인 점착제 조성물.
The pressure-sensitive adhesive composition according to claim 1, wherein the acid anhydride of the formula (1) is contained so as to have 10 to 50 functional groups per 100 of the functional groups of the hydroxy group of the acrylic copolymer having a hydroxy group.
청구항 1에 있어서, 상기 가교제는 히드록시기를 갖는 아크릴계 공중합체 100중량부에 대하여 0.1 내지 3.0중량부 함유하는 것인 점착제 조성물.
The pressure-sensitive adhesive composition according to claim 1, wherein the crosslinking agent contains 0.1 to 3.0 parts by weight per 100 parts by weight of the acrylic copolymer having a hydroxy group.
KR20130060746A 2013-05-29 2013-05-29 Composition for adhesive KR20140140225A (en)

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