KR20130047234A - Composition of adhesive film in touch screen panel for rework process - Google Patents

Composition of adhesive film in touch screen panel for rework process Download PDF

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KR20130047234A
KR20130047234A KR1020110112134A KR20110112134A KR20130047234A KR 20130047234 A KR20130047234 A KR 20130047234A KR 1020110112134 A KR1020110112134 A KR 1020110112134A KR 20110112134 A KR20110112134 A KR 20110112134A KR 20130047234 A KR20130047234 A KR 20130047234A
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acrylate
composition
adhesive
oca
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KR101348525B1 (en
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김장순
윤찬오
송민석
박은경
정부기
박성찬
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(주)엘지하우시스
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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
    • 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
    • C09J133/06Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/0008Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0025Crosslinking or vulcanising agents; including accelerators
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/16Nitrogen-containing compounds
    • C08K5/29Compounds containing one or more carbon-to-nitrogen double bonds
    • 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
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02Non-macromolecular additives
    • C09J11/06Non-macromolecular additives organic
    • 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
    • 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
    • C09J7/00Adhesives in the form of films or foils
    • C09J7/30Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38Pressure-sensitive adhesives [PSA]
    • C09J7/381Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/385Acrylic polymers
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412Digitisers structurally integrated in a display
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • 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
    • C09J2203/00Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/318Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Adhesive Tapes (AREA)

Abstract

PURPOSE: A composition for an OCA(Optically Clear Adhesive) film is provided to obtain adhesive reliability by thermal curing and to reduce adhesion by UV-irradiation at detachment, thereby easily separating a panel and an LCD. CONSTITUTION: A composition for an OCA film comprises an acrylate-based compound-containing UV-curable adhesive resin composition, a thermosetting agent, and a photoinitiator. A manufacturing method of the OCA film comprises a step of obtaining an acrylate-based polymer by polymerizing an alkyl acrylate and functional group-containing monomer; a step of putting an acrylate which has isocyanate group or glycidyl group, into the polymer and conducting a reaction to obtaining a UV-curable adhesive resin; a step of putting a thermosetting agent and photoinitiator into the adhesive resin to obtain a composition mixture; and a step of coating a substrate with the composition mixture and heating and curing the composition.

Description

재 작업이 용이한 터치 스크린 패널의 점착 필름용 조성물{Composition of adhesive film in touch screen panel for rework process}Composition of adhesive film in touch screen panel for rework process

본 발명은 터치 스크린 패널과 LCD 간에 에어 갭(air gap)을 메워주는 OCA(Optically clear adhesive) 필름의 제조용 조성물에 관한 것으로, 보다 상세하게는 아크릴레이트계 화합물이 포함된 자외선 경화형 점착 수지 조성물, 열경화제 및 광개시제를 포함하여, 부착 시에는 접착력이 높아 신뢰성을 확보할 수 있으면서도 자외선 조사를 통하여 재 작업이 가능한 수준 까지 접착력이 낮아질 수 있도록 제조한 OCA 필름용 점접착 조성물에 관한 것이다.
The present invention relates to a composition for preparing an optically clear adhesive (OCA) film that fills an air gap between a touch screen panel and an LCD, and more particularly, an ultraviolet curable adhesive resin composition containing an acrylate-based compound, and a heat. Including a curing agent and a photoinitiator, the adhesion is high at the time of adhesion, while ensuring the reliability, while the adhesive strength for the OCA film prepared to be lowered to the level that can be reworked through ultraviolet irradiation.

터치 스크린 패널(Touch Screen Panel)은 휴대폰 등의 전자 기기에 적용되며, 상부 패널과 하부 LCD 간에 양면 테이프를 테두리에 부착하는 방식으로 고정되어 왔다. The touch screen panel is applied to electronic devices such as mobile phones and has been fixed by attaching a double-sided tape to the frame between the upper panel and the lower LCD.

그러나 상기 패널과 LCD 사이에 에어 갭(air gap)이 형성되며, 이로 인하여 시인성이 낮아지는 문제가 있었다. However, an air gap is formed between the panel and the LCD, thereby lowering the visibility.

최근 상기 에어 갭을 메우기 위하여 OCA(Optically clear adhesive, 광학투명점착) 필름이 사용되고 있다. 도 1은 LCD 층(15), ITO 층(14), 상부 OCA 층(11) 및 커버 글래스(10)가 적층된 상태에서 양면 테이프(13)에 의하여 생성된 공간(14)을 나타내고 있으며, 이를 OCA 필름을 이용하여 메울 수 있다. 다만, 이 경우 진공 라미공정을 통하여 OCA 필름의 부착이 이루어져야 하고, 특히 부착 공정 중 문제가 발생하여 터치 스크린 패널과 LCD를 분리해야 하는 경우 패널과 LCD를 분리해야 하며, 상기 분리 과정이 용이하지 않은 경우 고가인 LCD를 폐기해야 하는 문제가 있다. Recently, an OCA (optically clear adhesive) film has been used to fill the air gap. FIG. 1 shows the space 14 created by the double-sided tape 13 with the LCD layer 15, the ITO layer 14, the upper OCA layer 11 and the cover glass 10 laminated. It can be filled using an OCA film. However, in this case, the OCA film must be adhered through the vacuum laminating process. In particular, when the touch screen panel and the LCD are to be separated due to a problem during the adhering process, the panel and the LCD must be separated. There is a problem of discarding the expensive LCD.

한편, 한국공개특허 제2010-90530호에서는 시인성을 개선하기 위하여 감압접착제 층과 OCA 층을 구비한 터치 패널을 개시하고 있으나, 패널의 분리를 위한 기술적 구성은 개시되어 있지 아니하다. Korean Patent Laid-Open Publication No. 2010-90530 discloses a touch panel having a pressure-sensitive adhesive layer and an OCA layer for improving the visibility, but does not disclose a technical structure for separating the panel.

따라서 터치 스크린 패널의 유리 또는 플라스틱 기재와 LCD 편광판과의 부착력이 우수하면서도 패널과 LCD를 용이하게 분리할 수 있는 점착제 층의 개발이 요구되는 실정이다.
Accordingly, there is a need to develop a pressure-sensitive adhesive layer that is excellent in adhesion between a glass or plastic substrate of a touch screen panel and an LCD polarizer, and easily separates the LCD from the panel.

이에 본 발명자들은, 패널과 LCD의 분리가 용이하여 재 작업이 가능한 터치 스크린 패널용 OCA 필름을 개발하기 위하여 연구, 노력한 결과 아크릴레이트계 화합물이 포함된 자외선 경화형 점착 수지 조성물, 열경화제 및 광개시제를 혼합하고 열경화를 실시하여 OCA 필름을 제조하면 초기에 접착력이 우수하여 신뢰성을 확보할 수 있으며, 자외선 경화를 통하여 접착력을 낮출 수 있어 패널과 LCD가 용이하게 분리될 수 있음을 발견함으로써 본 발명을 완성하게 되었다. Accordingly, the present inventors researched and tried to develop an OCA film for a touch screen panel that can be easily reworked because the panel and the LCD are easily separated, and thus, an ultraviolet curable pressure-sensitive adhesive resin composition containing a acrylate compound, a thermosetting agent, and a photoinitiator are mixed. When the OCA film is manufactured by thermal curing, the adhesion is excellent at the initial stage to ensure reliability, and the adhesion can be lowered through ultraviolet curing, thereby completing the present invention by discovering that the panel and the LCD can be easily separated. Was done.

따라서, 본 발명의 목적은 열경화에 의하여 접착력이 높은 상태로 유지되다가, 자외선 경화에 의하여 접착력이 낮아져 재 작업이 용이하게 이루어질 수 있는 OCA 필름용 조성물을 제공하는 것이다.
Accordingly, an object of the present invention is to provide a composition for the OCA film that can be maintained in a high adhesive state by thermal curing, the adhesive strength is lowered by ultraviolet curing can be easily reworked.

상기 목적을 달성하기 위한 본 발명의 실시예에 따른 OCA 필름용 점착 조성물은 아크릴레이트계 화합물이 포함된 자외선 경화형 점착 수지 조성물, 열경화제 및 광개시제가 혼합된 것을 특징으로 한다. OCA film pressure-sensitive adhesive composition according to an embodiment of the present invention for achieving the above object is characterized in that the UV-curable pressure-sensitive adhesive resin composition, a thermosetting agent and a photoinitiator is mixed.

또한 상기 목적을 달성하기 위한 본 발명의 실시예에 따른 OCA 필름의 제조방법은 알킬 아크릴레이트 및 관능기를 가지는 단량체가 중합된 아크릴레이트계 중합체에 이소시아네이트기 또는 글리시딜기를 가지는 아크릴레이트를 투입, 반응시켜 이중결합이 브랜칭(branching)된 자외선 경화형 점착 수지를 제조하고, 열경화제 및 광개시제를 넣어 얻은 혼합 조성물을 코팅 및 열경화하는 단계를 포함하는 것을 특징으로 한다.
In addition, in the method for producing an OCA film according to an embodiment of the present invention for achieving the above object, an acrylate having an isocyanate group or glycidyl group is added to an acrylate polymer polymerized with an alkyl acrylate and a monomer having a functional group, and reacted. It is characterized in that it comprises a step of preparing a UV-curable pressure-sensitive adhesive branched branched (branching) double bond, and coating and thermosetting the mixed composition obtained by adding a thermosetting agent and a photoinitiator.

본 발명의 OCA 필름용 점착 조성물은 열경화에 의하여 신뢰성을 확보할 수 있고, 불량이 발생하는 경우 자외선을 조사하여 접착력을 낮춤으로써 패널과 LCD 간의 분리가 용이하도록 할 수 있어 패널과 LCD를 모두 재활용할 수 있는 장점이 있다.
The adhesive composition for the OCA film of the present invention can secure reliability by thermal curing, and when the defect occurs, it is possible to facilitate separation between the panel and the LCD by lowering the adhesive strength by irradiating ultraviolet rays to recycle both the panel and the LCD. There is an advantage to this.

도 1은 LCD 층, ITO 층, 상부 OCA 층 및 커버 글래스가 적층된 구조를 나타낸 것이다.1 shows a structure in which an LCD layer, an ITO layer, an upper OCA layer, and a cover glass are laminated.

본 발명의 이점 및 특징, 그리고 그것들을 달성하는 방법은 상세하게 후술되어 있는 실시예들을 참조하면 명확해질 것이다. 그러나, 본 발명은 이하에서 개시되는 실시예들에 한정되는 것이 아니라 서로 다른 다양한 형태로 구현될 것이며, 단지 본 실시예들은 본 발명의 개시가 완전하도록 하며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이며, 본 발명은 청구항의 범주에 의해 정의될 뿐이다. Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described in detail below. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

이하 본 발명의 실시예에 따른 OCA 필름용 조성물 및 OCA 필름의 제조방법에 관하여 상세히 설명하기로 한다.
Hereinafter, the composition for the OCA film and the method for producing the OCA film according to an embodiment of the present invention will be described in detail.

OCAOCA 필름용 조성물 Composition for film

본 발명의 OCA 필름용 조성물은,The composition for the OCA film of the present invention,

아크릴레이트계 화합물이 포함된 자외선 경화형 점착 수지 조성물, 열경화제 및 광개시제가 혼합된 것을 특징으로 한다. An ultraviolet curable pressure-sensitive adhesive resin composition, a thermosetting agent, and a photoinitiator containing an acrylate compound are mixed.

상기 자외선 경화형 점착 수지 조성물은 알킬아크릴레이트, 관능기를 가지는 단량체 및 이소시아네이트기 또는 글리시딜기를 가지는 아크릴레이트가 혼합되는 것을 특징으로 하며, 하기와 같이 2단계에 의하여 제조될 수 있다. 먼저 1단계로는 알킬아크릴레이트와 하이드록실기 또는 카르복실기와 같은 관능기를 가지는 단량체 및 열개시제를 투입하여 용제 중합 등을 통하여 제조될 수 있다. 상기 알킬아크릴레이트로는 탄소수 1~12의 알킬기를 가지는 아크릴레이트 단량체를 들 수 있으며, 보다 구체적으로는 부틸아크릴레이트, 헥실아크릴레이트, n-옥틸아크릴레이트, 이소옥틸아크릴레이트, 2-에틸헥실아크릴레이트, 이소노닐아크릴레이트 또는 기타 (메타)아크릴레이트계 단량체 등이 있으나, 이에만 한정되는 것은 아니다. 또한 하이드록실기를 가지는 단량체로는 하이드록시 에틸 (메타)아크릴레이트, 하이드록시 부틸 아크릴레이트, 하이드록시 프로필 아크릴레이트 등이 있으며, 카르복실기를 가지는 단량체로는 아크릴산이 가장 범용적으로 사용되나, 이외에 메타아크릴산등도 사용될 수 있으며, 이에 한정되는 것은 아니다. 상기 하이드록실기 또는 카르복실기를 가지는 단량체는 알킬아크릴레이트 100 중량부에 대하여 10 ~ 50 중량부가 사용될 수 있으며, 보다 바람직하게는 20 ~ 40 중량부가 사용될 수 있으나 이에 한정되지는 않는다.The UV-curable pressure-sensitive adhesive resin composition is characterized in that the alkyl acrylate, the monomer having a functional group and the acrylate having an isocyanate group or glycidyl group are mixed, it can be prepared by two steps as follows. First, the monomer and the thermal initiator having a functional group such as alkyl acrylate and hydroxyl group or carboxyl group may be added through solvent polymerization. As said alkyl acrylate, the acrylate monomer which has a C1-C12 alkyl group is mentioned, More specifically, butyl acrylate, hexyl acrylate, n-octyl acrylate, isooctyl acrylate, 2-ethylhexyl acryl Elate, isononyl acrylate or other (meth) acrylate monomers, and the like, but is not limited thereto. In addition, hydroxyl monomers include hydroxyethyl (meth) acrylate, hydroxy butyl acrylate, hydroxy propyl acrylate, and the like. As monomers having carboxyl groups, acrylic acid is most commonly used. Acrylic acid may also be used, but is not limited thereto. The monomer having a hydroxyl group or a carboxyl group may be used 10 to 50 parts by weight based on 100 parts by weight of alkyl acrylate, more preferably 20 to 40 parts by weight may be used, but is not limited thereto.

상기 1단계에서 중합된 고분자에 이중결합을 브랜칭(branching)시켜 자외선 경화성을 부여하기 위하여, 이소시아네이트기 또는 글리시딜기를 가지는 아크릴레이트를 부가 반응 시킨다(2단계). 이 때, 1단계에서 하이드록실기를 가지는 단량체를 사용한 경우에는 이소시아네이트기를 가지는 아크릴레이트를 부가하여 우레탄 결합을 유도하고, 1단계에서 카르복실기를 가지는 단량체를 사용한 경우에는 글리시딜기를 가지는 아크릴레이트를 부가하여 반응시키는 것이 유리하다. In order to branch the double bond to the polymer polymerized in the first step to impart ultraviolet curability, an acrylate having an isocyanate group or a glycidyl group is additionally reacted (step 2). In this case, when the monomer having a hydroxyl group is used in step 1, an acrylate having an isocyanate group is added to induce a urethane bond, and when the monomer having a carboxyl group is used in step 1, an acrylate having a glycidyl group is added. It is advantageous to make it react.

상기 이소시아네이트기를 가지는 아크릴레이트는 메타크릴로일이소시아네이트, 2-메타크릴로일옥시에틸이소시아네이트 및 m-이소프로페닐-디메틸벤질이소시아네이트 등 구조 내 이중결합과 이소시아네이트기를 동시에 가지는 단량체 중에서 선택된 1종 또는 2종 이상의 화합물이 사용될 수 있다. 또한 상기 글리시딜기를 가지는 아크릴레이트는 가장 대표적인 것으로 글리시딜 (메타)아크릴레이트를 들 수 있으며, 구조 내 글리시딜기와 이중결합을 동시에 가지는 단량체 또는 화합물이면 어느 것을 사용해도 무방하다. The acrylate having an isocyanate group is one or two selected from monomers having a double bond and an isocyanate group in a structure such as methacryloyl isocyanate, 2-methacryloyloxyethyl isocyanate and m-isopropenyl-dimethylbenzyl isocyanate The above compounds can be used. In addition, the acrylate having the glycidyl group is the most representative of the glycidyl (meth) acrylate, and may be used as long as the monomer or compound having a glycidyl group and a double bond in the structure at the same time.

상기 이소시아네이트기 또는 글리시딜기를 가지는 아크릴레이트 화합물은 1단계 중합 시 알킬아크릴레이트 100 중량부에 대하여 5 ~ 50 중량부를 사용하는 것이 바람직하며, 보다 바람직하게는 10 ~ 30 중량부를 사용하는 것이 좋다. 상기 함량 미만으로 사용되면 2단계 반응 이후 브랜칭된 이중결합 수가 적어 자외선 조사 후 박리력이 크게 감소하지 않게 되고, 상기 함량을 초과하면 자외선 조사 후 박리력이 너무 급격하게 감소하여 접착력이 크게 떨어지는 문제가 있다. The acrylate compound having an isocyanate group or glycidyl group is preferably used 5 to 50 parts by weight, more preferably 10 to 30 parts by weight based on 100 parts by weight of the alkyl acrylate during the one-step polymerization. If the amount is less than the content, the number of branched double bonds after the two-stage reaction is small, so that the peeling force does not decrease significantly after ultraviolet irradiation. have.

상기와 같이 2단계를 거쳐 제조된 자외선 경화형 점착수지 조성물을 필름으로 제조하여 열경화 시키고, 자외선을 조사하여 박리력 감소를 유도하기 위하여 열경화제와 광개시제를 혼합한다. The UV curable adhesive resin composition prepared through the two steps as described above is thermally cured by preparing a film, and the thermosetting agent and the photoinitiator are mixed in order to induce peel force by irradiating ultraviolet rays.

상기 열경화제로는 상기 1단계에서 하이드록실기를 가지는 단량체를 사용한 경우에는 이소시아네이트계 열경화제를 사용하는 것이 바람직한데, 이러한 이소시아네이트계 열경화제는 상기의 이소시아네이트기를 가지는 아크릴레이트와 반응하지 않은 자외선 경화형 점착수지 조성물 내 하이드록실기와 반응하여 열경화가 이루어지도록 하며, 그 종류로는 2,4-톨루엔디이소시아네이트(2,4-TDI), 2,6-톨루엔디이소시아네이트(2,6-TDI), 4,4'-디페닐메탄디이소시아네이트(MDI), 4,4'-디시클로헥실메탄디이소시아네이트 (H12MDl), 1,5-나프탈렌디이소시아네이트(NDI), 1,6-헥사메틸렌디이소시아네이트(HDI), 자일렌디이소시아네이트(XDI), 이소포론디이소시아네이트(IPDI) 및 3-이소시아네이토메틸-3,5,5-트리메틸시클로헥실디이소시아네이트(TMDI) 중에서 선택된 1종 또는 2종 이상의 화합물이 사용될 수 있다. When the monomer having a hydroxyl group is used as the thermosetting agent, it is preferable to use an isocyanate-based thermosetting agent. Such isocyanate-based thermosetting agent is UV-curable adhesive that does not react with the acrylate having the isocyanate group. It reacts with the hydroxyl group in the resin composition to achieve thermosetting, and the types thereof include 2,4-toluene diisocyanate (2,4-TDI), 2,6-toluene diisocyanate (2,6-TDI), 4,4'-diphenylmethane diisocyanate (MDI), 4,4'-dicyclohexyl methane diisocyanate (H12MDl), 1,5-naphthalene diisocyanate (NDI), 1,6-hexamethylene diisocyanate (HDI ), Xylene diisocyanate (XDI), isophorone diisocyanate (IPDI) and one or two selected from 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl diisocyanate (TMDI) There are on the compounds may be used.

또한 상기 1단계에서 카르복실기를 가지는 단량체를 사용한 경우 열경화제는 아지리딘계 경화제, 에폭시계 경화제, 이소시아네이트계 경화제 또는 킬레이트 경화제 등을 사용할 수 있다. In addition, when the monomer having a carboxyl group is used in the first step, the thermosetting agent may be an aziridine-based curing agent, an epoxy-based curing agent, an isocyanate-based curing agent or a chelate curing agent.

한편, 상기 열경화제는 상기 점착 수지 조성물 100 중량부에 대하여 0.05 ~ 5 중량부가 사용되는 것이 바람직하며, 더욱 바람직하게는 0.1 ~ 3 중량부가 사용되는 것이 좋다. 상기 범위 미만인 경우에는 열경화가 충분히 일어나지 않는 문제가 있으며, 상기 범위를 초과하면 열경화가 급격하게 이루어져 경화 정도의 조절에 문제가 있다.On the other hand, the thermosetting agent is preferably used 0.05 to 5 parts by weight, more preferably 0.1 to 3 parts by weight based on 100 parts by weight of the adhesive resin composition. If it is less than the above range, there is a problem that the heat curing does not occur sufficiently, and if the above range is exceeded, there is a problem in controlling the degree of curing due to rapid heat curing.

그리고 광개시제는 자외선 조사 시 이중 결합간의 큐어링(curing)을 유도하여 강도가 증진되어 접착력이 낮아지도록 하는 역할을 하며, 벤조페논, N,N'-테트라메틸-4,4'-디아미노벤조페논(미힐러케톤), N,N'-테트라에틸-4,4'-디아미노벤조페논, 4-메톡시-4'-디메틸아미노벤조페논, 2-벤질-2-디메틸아미노-1-(4-몰포리노페닐)-부타논-1,2,2-디메톡시-1,2-디페닐에탄-1-온, 1-히드록시-시클로헥실-페닐-케톤, 2-메틸-1-(4-(메틸티오)페닐)-2-몰포리노프로파논-1,2,4-디에틸티옥산톤, 2-에틸안트라퀴논 및 페난트렌퀴논 등의 방향족 케톤, 벤조인메틸에테르, 벤조인에틸에테르 및 벤조인페닐에테르 등의 벤조인에테르, 메틸벤조인 및 에틸벤조인 등의 벤조인, 벤질디메틸케탈 등의 벤질 유도체, 2-(o-클로로페닐)-4,5-디페닐이미다졸 이량체, 2-(o-클로로페닐)-4,5-디(m-메톡시페닐)이미다졸 이량체, 2-(o-플루오로페닐)-4,5-페닐이미다졸 이량체, 2-(o-메톡시페닐)-4,5-디페닐이미다졸 이량체, 2-(p-메톡시페닐)-4,5-디페닐이미다졸 이량체, 2,4-디(p-메톡시페닐)-5-페닐이미다졸 이량체 및 2-(2,4-디메톡시페닐)-4,5-디페닐이미다졸 이량체 등의 2,4,5-트리아릴이미다졸 이량체, 9-페닐아크리딘 및 1,7-비스(9,9'-아크리디닐)헵탄 등의 아크리딘 유도체, 비스(2,6-디메톡시벤조일)-2,4,4-트리메틸-펜틸포스핀옥사이드 중에서 선택된 1종 이상을 사용하는 것이 바람직하다. The photoinitiator acts to induce curing between the double bonds during UV irradiation, thereby enhancing the strength and lowering the adhesive strength. Benzophenone, N, N'-tetramethyl-4,4'-diaminobenzophenone (Mihilerketone), N, N'-tetraethyl-4,4'-diaminobenzophenone, 4-methoxy-4'-dimethylaminobenzophenone, 2-benzyl-2-dimethylamino-1- (4 -Morpholinophenyl) -butanone-1,2,2-dimethoxy-1,2-diphenylethan-1-one, 1-hydroxy-cyclohexyl-phenyl-ketone, 2-methyl-1- (4 Aromatic ketones such as-(methylthio) phenyl) -2-morpholinopropaneone-1,2,4-diethylthioxanthone, 2-ethylanthraquinone and phenanthrenequinone, benzoin methyl ether, benzoin ethyl ether And benzoin ethers such as benzoin phenyl ether, benzoin such as methyl benzoin and ethyl benzoin, benzyl derivatives such as benzyl dimethyl ketal, and 2- (o-chlorophenyl) -4,5-diphenylimidazole equivalents Sieve, 2- (o-chlorophenyl) -4,5-di (m-methoxyphenyl) Dazole dimer, 2- (o-fluorophenyl) -4,5-phenylimidazole dimer, 2- (o-methoxyphenyl) -4,5-diphenylimidazole dimer, 2- ( p-methoxyphenyl) -4,5-diphenylimidazole dimer, 2,4-di (p-methoxyphenyl) -5-phenylimidazole dimer and 2- (2,4-dimethoxy 2,4,5-triarylimidazole dimers, such as phenyl) -4,5-diphenylimidazole dimer, 9-phenylacridine and 1,7-bis (9,9'-acrididi It is preferable to use at least one selected from acridine derivatives such as nil) heptane and bis (2,6-dimethoxybenzoyl) -2,4,4-trimethyl-pentylphosphine oxide.

상기 광개시제는 상기 점착 수지 조성물 100 중량부에 대하여 0.1 ~ 10 중량부가 사용되는 것이 바람직하며, 더욱 바람직하게는 0.5 ~ 5 중량부가 사용되는 것이 좋다. 상기 범위 미만인 경우에는 자외선을 조사하더라도 충분한 경화반응이 진행되지 않아 접착력이 크게 감소하지 않고 재작업성이 낮아지며, 상기 범위를 초과하면 자외선 조사 시 반응이 급격하게 이루어져 박리력이 크게 감소하여 신뢰성을 낮추는 문제가 있다.
The photoinitiator is preferably used 0.1 to 10 parts by weight, more preferably 0.5 to 5 parts by weight based on 100 parts by weight of the adhesive resin composition. If it is less than the above range, even if irradiated with ultraviolet light does not proceed sufficient curing reaction, the adhesion strength is not significantly reduced and the reworkability is lowered, if the above range is exceeded the reaction is sharply reduced during the irradiation with ultraviolet light greatly reduces the peeling force to lower the reliability there is a problem.

OCAOCA 필름의 제조방법 Method of manufacturing film

본 발명의 OCA 필름의 제조방법은,The manufacturing method of the OCA film of this invention,

알킬 아크릴레이트 및 관능기를 가지는 단량체를 중합하여 아크릴레이트계 중합체를 얻는 단계; Polymerizing an alkyl acrylate and a monomer having a functional group to obtain an acrylate polymer;

상기 중합체에 이소시아네이트기 또는 글리시딜기를 가지는 아크릴레이트를 투입하고 반응시켜 자외선 경화형 점착 수지를 얻는 단계;Adding an acrylate having an isocyanate group or glycidyl group to the polymer and reacting to obtain an ultraviolet curable pressure sensitive adhesive resin;

상기 점착 수지에 열경화제 및 광개시제를 넣고 혼합 조성물을 얻는 단계; 및 Adding a thermosetting agent and a photoinitiator to the adhesive resin to obtain a mixed composition; And

상기 혼합 조성물을 코팅하고 50 ~ 150 ℃로 가열하여 경화하는 단계를 포함하는 것을 특징으로 한다. Coating the mixed composition and curing by heating to 50 ~ 150 ℃.

이 때, 상기 경화는 열풍 건조 후 숙성하는 열경화 방법에 이루어지는 것이 바람직하다. At this time, it is preferable that the said hardening is made in the thermosetting method which matures after hot air drying.

상기 과정을 통하여 OCA 필름을 제조할 수 있으며, 상기 OCA 필름은 자외선 조사를 통하여 신뢰성이 상실되지 않는 범위 내에서 재 작업이 가능한 수준의 접착력을 확보할 수 있다. 즉, 자외선 조사 전에는 우수한 접착력을 나타내며, 자외선 조사 후 접착력이 낮아지나 신뢰성은 확보가 가능하여, 모듈 작업이 모두 완료된 후 불량이 발생하여 LCD와 패널을 분리해야 하는 경우, LCD와 패널을 모두 보호할 수 있다.
The OCA film can be manufactured through the above process, and the OCA film can secure a level of adhesive force that can be reworked within a range where reliability is not lost through ultraviolet irradiation. In other words, it exhibits excellent adhesion before UV irradiation, and its adhesive strength is low after UV irradiation, but reliability can be secured.If the LCD and panel need to be separated after defects occur after all module work is completed, both LCD and panel should be protected. Can be.

한편, 상기 OCA 필름의 상부 및 하부에는 점착층의 보호를 위하여 이형 필름이 위치할 수 있고, 이러한 이형 필름으로는 PET 필름 등 다양한 필름을 이용할 수 있으며, 보다 바람직하게는 이형을 쉽게 할 수 있도록 이형력이 10g/in 정도인 이형용 PET 필름을 제시할 수 있다.
On the other hand, the upper and lower portions of the OCA film may be a release film for the protection of the adhesive layer, as the release film can be used a variety of films such as PET film, more preferably release to facilitate the release A release PET film having a force of about 10 g / in may be provided.

이하, 본 발명의 바람직한 실시예 및 비교예를 통하여 본 발명의 OCA 필름용 조성물에 관하여 상세히 설명하기로 한다.Hereinafter, the composition for the OCA film of the present invention through the preferred examples and comparative examples of the present invention will be described in detail.

이하의 실시예 및 비교예는 본 발명을 예시하기 위한 것일 뿐, 본 발명의 범위가 하기 실시예에 한정되는 것은 아니다.
The following examples and comparative examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

실시예Example 1 One

아크릴레이트계 화합물로서 2-에틸헥실아크릴레이트(2-EHA) 55 중량부, 메틸아크릴레이트(MA) 25 중량부 및 하이드록시에틸 아크릴레이트(HEA) 20 중량부를 혼합하고, 용액중합을 실시하여 중량평균분자량 500,000의 아크릴레이트계 중합체를 제조하였다. 다음 2-메타크릴로일옥시에틸이소시아네이트 (MOI) 18 중량부를 투입하여 자외선 경화형 고분자 점착 수지를 얻었다. As the acrylate compound, 55 parts by weight of 2-ethylhexyl acrylate (2-EHA), 25 parts by weight of methyl acrylate (MA), and 20 parts by weight of hydroxyethyl acrylate (HEA) were mixed, and solution polymerization was performed. An acrylate polymer having an average molecular weight of 500,000 was prepared. Next, 18 parts by weight of 2-methacryloyloxyethyl isocyanate (MOI) was added to obtain an ultraviolet curable polymer adhesive resin.

다음 상기 고분자 점착 수지에 2,6-톨루엔디이소시아네이트(2,6-TDI) 1.0 중량부 및 이가큐어(Irgacure) 651 0.5 중량부를 넣고 혼합하여 최종 코팅 조성물을 제조하였다.
Next, 1.0 parts by weight of 2,6-toluene diisocyanate (2,6-TDI) and 0.5 parts by weight of Irgacure 651 were added to the polymer adhesive resin to prepare a final coating composition.

실시예Example 2 2

자외선 경화형 고분자 점착 수지에 2,6-톨루엔디이소시아네이트(2,6-TDI) 0.5 중량부 및 이가큐어(Irgacure) 651 1.0 중량부를 넣고 혼합하는 것을 제외하고는 실시예 1과 동일하게 최종 코팅 조성물을 얻었다.
A final coating composition was prepared in the same manner as in Example 1, except that 0.5 parts by weight of 2,6-toluene diisocyanate (2,6-TDI) and 1.0 part by weight of Irgacure 651 were added to the ultraviolet curable polymer adhesive resin. Got it.

실시예Example 3 3

고분자 점착 수지에 2,6-톨루엔디이소시아네이트(2,6-TDI) 1.5 중량부 및 이가큐어(Irgacure) 651 0.5 중량부를 넣고 혼합하는 것을 제외하고는 실시예 1과 동일하게 최종 코팅 조성물을 얻었다.
A final coating composition was obtained in the same manner as in Example 1, except that 1.5 parts by weight of 2,6-toluene diisocyanate (2,6-TDI) and 0.5 parts by weight of Irgacure 651 were added to the polymer adhesive resin.

비교예Comparative example 1 One

실시예 1에서 제조된 자외선 경화형 고분자 점착 수지에 열경화제만을 혼합하고 최종 코팅 조성물을 제조한 것을 제외하고는 실시예 1과 동일하게 진행하였다.
The procedure was the same as in Example 1, except that only the thermosetting agent was mixed with the UV-curable polymer adhesive resin prepared in Example 1, and a final coating composition was prepared.

비교예Comparative example 2 2

실시예 1에서 제조된 자외선 경화형 고분자 점착 수지에 광개시제만을 혼합하고 최종 코팅 조성물을 제조한 것을 제외하고는 실시예 1과 동일하게 진행하였다.
It proceeded in the same manner as in Example 1 except that only the photoinitiator was mixed with the UV-curable polymer adhesive resin prepared in Example 1 and a final coating composition was prepared.

평가evaluation

1. 자외선 조사 전 박리력 및 신뢰성 비교 1. Comparison of peeling force and reliability before UV irradiation

상기 실시예 및 비교예의 조성물을 이형 PET 상에 100 ㎛의 두께로 코팅한 후, 열풍 오븐에 넣고 100 ℃에서 5분간 가열하여 용제를 완전히 휘발시켰고, 이후 열경화가 충분이 이루어지도록 50 ℃ 오븐에서 24시간 동안 숙성을 진행하였다. After coating the composition of the Examples and Comparative Examples to a thickness of 100 ㎛ on a release PET, and put in a hot air oven and heated at 100 ℃ for 5 minutes to completely volatilize the solvent, and then in a 50 ℃ oven so that the heat curing is sufficient Aging was performed for 24 hours.

상기 경화된 OCA 필름을 유리(10cm x 10cm x 1mm) 위에 라미네이션한 후, 125 ㎛ 두께의 PET 필름을 OCA 필름 위에 적층하였다. 다음, 60℃ 에서 30분간 5기압에서 오토클레이브(autoclave) 처리하여 시편을 준비하면서 발생된 기포를 제거하였다.After the cured OCA film was laminated on glass (10 cm × 10 cm × 1 mm), a 125 μm thick PET film was laminated on the OCA film. Next, autoclave treatment was carried out at 60 ° C. for 30 minutes at 5 atm to remove the bubbles generated while preparing the specimen.

폭이 2.5 cm, 길이가 10 cm 의 PET 필름을 박리 시편으로 제조하였고, 박리력 측정기인 Texture Analyzer(TA instrument사, 박리 속도 300 mm/min) 장비를 이용하여 박리력을 측정하였다. A PET film with a width of 2.5 cm and a length of 10 cm was prepared from the specimen and the peeling force was measured using a Texture Analyzer (TA instrument, peeling speed 300 mm / min) equipped with a peeling force gauge.

또한, 상기 자외선이 조사된 시편을 85℃, 85%RH 조건에서 24시간 방치한 후, 기포가 발생되는지 여부를 관찰하여 신뢰성 여부를 평가하였다.The specimens irradiated with ultraviolet rays were allowed to stand at 85 DEG C and 85% RH for 24 hours, and then whether bubbles were generated or not was evaluated for reliability.

상기 측정 결과를 하기 표 1에 나타내었다. The measurement results are shown in Table 1 below.

코팅 조성물Coating composition 자외선 조사 전 박리력(g/in)Peel force before UV irradiation (g / in) 신뢰성responsibility 실시예 1Example 1 15001500 기포없음No bubble 실시예 2Example 2 25002500 기포없음No bubble 실시예 3Example 3 11501150 기포없음No bubble 비교예 1Comparative Example 1 18001800 기포없음No bubble 비교예 2Comparative Example 2 37503750 기포발생
(부착면 들뜸)
Bubble generation
(Attachment side lifting)

상기 표 1에서 보는 바와 같이, 실시예의 코팅 조성물은 자외선 조사 전 박리력이 높고, 그에 따라 접착력이 우수하여 기포가 발생하지 아니하였다. 그러나 비교예 2의 조성물은 기포가 발생하여 부착면이 들뜨는 것을 확인할 수 있었다.
As shown in Table 1, the coating composition of the embodiment had a high peeling force before ultraviolet irradiation, and thus excellent adhesion, no bubbles were generated. However, in the composition of Comparative Example 2, it was confirmed that bubbles were generated and the adhesion surface was raised.

2. 자외선 조사 후 박리력 및 신뢰성 비교2. Comparison of peeling force and reliability after UV irradiation

상기와 같이 제조된 시편에 자외선을 1500 mJ/cm2의 조사량으로 10초간 조사하였고, 자외선이 조사된 시편을 상기와 같이 박리력을 측정하였다. The specimen thus prepared was irradiated with ultraviolet rays at an irradiation dose of 1500 mJ / cm 2 for 10 seconds, and the exfoliation force of the specimen irradiated with ultraviolet rays was measured.

또한, 상기 자외선이 조사된 시편을 85℃, 85%RH 조건에서 24시간 방치한 후, 기포가 발생되는지 여부를 관찰하여 신뢰성 여부를 평가하였다.The specimens irradiated with ultraviolet rays were allowed to stand at 85 DEG C and 85% RH for 24 hours, and then whether bubbles were generated or not was evaluated for reliability.

그리고 상기 박리력 측정기의 박리 속도를 1 m/min로 조절하여 시편을 박리한 후, 유리 기재 상에 잔사가 남는지를 확인하여 재 작업성 여부를 확인하였다.
And after peeling the specimen by adjusting the peeling rate of the peel force gauge to 1 m / min, it was confirmed whether the residue remains on the glass substrate to determine whether reworkability.

상기 실험 결과를 하기 표 2에 나타내었다. The experimental results are shown in Table 2 below.

코팅 조성물Coating composition 자외선 조사 후 박리력(g/in)Peel force (g / in) after ultraviolet irradiation 신뢰성responsibility 재 작업성Reworkability 실시예 1Example 1 700700 기포없음No bubble 잔사 없음No residue 실시예 2Example 2 500500 기포없음No bubble 잔사 없음No residue 실시예 3Example 3 800800 기포없음No bubble 잔사 없음No residue 비교예 1Comparative Example 1 18701870 기포발생
(부착면 들뜸)
Bubble generation
(Attachment side lifting)
잔사 발생Residue
비교예 2Comparative Example 2 11501150 기포발생
(부착면 들뜸)
Bubble generation
(Attachment side lifting)
잔사 발생Residue

상기 표 2에서 보는 바와 같이 실시예의 코팅 조성물은 박리력이 낮게 측정되었으며, 특히 실시예 1 ~ 3은 자외선 조사전후 박리력이 우수하고 특히 자외선 조사 후에 박리력은 신뢰성이 확보되면서도 재작업이 가능한 수준임을 확인할 수 있었다. 그러나 비교예 1 ~ 2의 코팅 조성물은 박리력이 높게 나타나고 박리 시 유리 기재 상에 잔사가 남게 되는 문제가 나타났다. 또한 자외선 조사 후에 박리력이 낮아지지 않아 신뢰성이 확보되지 않은 것을 확인할 수 있었다.
As shown in Table 2, the coating composition of the Example was measured to have a low peeling force, and in particular, Examples 1 to 3 had excellent peeling force before and after UV irradiation, and in particular, peeling force after UV irradiation was a level capable of reworking while ensuring reliability. Could confirm. However, the coating compositions of Comparative Examples 1 to 2 showed a high peeling force and a problem that a residue remained on the glass substrate during peeling. In addition, it was confirmed that the peeling force did not decrease after ultraviolet irradiation, and thus reliability was not secured.

이상에서는 본 발명의 실시예를 중심으로 설명하였으나, 이는 예시적인 것에 불과하며, 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 기술자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다. 따라서, 본 발명의 진정한 기술적 보호범위는 이하에 기재되는 특허청구범위에 의해서 판단되어야 할 것이다.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. . Accordingly, the true scope of the present invention should be determined by the following claims.

10 : 커버 글래스 11 : 상부 OCA 층
12 : ITO PET/유리층 13 : 양면 테이프
14 : 빈 공간 15 : LCD 층
10: cover glass 11: upper OCA layer
12: ITO PET / glass layer 13: double-sided tape
14: empty space 15: LCD layer

Claims (12)

아크릴레이트계 화합물이 포함된 자외선 경화형 점착 수지 조성물, 열경화제 및 광개시제를 포함하는 것을 특징으로 하는 재 작업이 용이한 OCA(Optically clear adhesive) 필름용 점접착 조성물.
An adhesive composition for easy reworking OCA (Optically clear adhesive) film, characterized in that it comprises an ultraviolet curable pressure-sensitive adhesive resin composition, a thermosetting agent and a photoinitiator containing an acrylate compound.
제 1 항에 있어서,
상기 자외선 경화형 점착 수지 조성물은 알킬아크릴레이트, 관능기를 가지는 단량체, 및 이소시아네이트기 또는 글리시딜기를 가지는 아크릴레이트가 포함되는 것을 특징으로 하는 재 작업이 용이한 OCA 필름용 점접착 조성물.
The method of claim 1,
The UV-curable pressure-sensitive adhesive resin composition is easy to rework OCA film, characterized in that an alkyl acrylate, a monomer having a functional group, and an acrylate having an isocyanate group or glycidyl group.
제 2 항에 있어서,
이소시아네이트기 또는 글리시딜기를 가지는 아크릴레이트 화합물은 알킬아크릴레이트 100 중량부에 대하여 5 ~ 50 중량부가 포함되는 것을 특징으로 하는 재 작업이 용이한 OCA 필름용 점접착 조성물.
The method of claim 2,
An acrylate compound having an isocyanate group or glycidyl group is easily reworked OCA film, characterized in that 5 to 50 parts by weight based on 100 parts by weight of alkyl acrylate.
제 2 항에 있어서,
상기 알킬 아크릴레이트는 부틸아크릴레이트, 헥실아크릴레이트, n-옥틸아크릴레이트, 이소옥틸아크릴레이트, 2-에틸헥실아크릴레이트, 이소노닐아크릴레이트 또는 (메타)아크릴레이트계 단량체 중에서 선택된 1종 또는 2종 이상의 화합물인 것을 특징으로 하는 OCA 필름용 점접착 조성물.
The method of claim 2,
The alkyl acrylate is one or two selected from butyl acrylate, hexyl acrylate, n-octyl acrylate, isooctyl acrylate, 2-ethylhexyl acrylate, isononyl acrylate or (meth) acrylate monomer It is an above compound, The adhesive bond composition for OCA films characterized by the above-mentioned.
제 2 항에 있어서,
상기 관능기는 하이드록시기 또는 카르복실기인 것을 특징으로 하는 OCA 필름용 점접착 조성물.
The method of claim 2,
The functional group is an adhesive bonding composition for an OCA film, characterized in that a hydroxyl group or a carboxyl group.
제 1 항에 있어서,
상기 열경화제는 아지리딘계 경화제, 에폭시계 경화제, 이소시아네이트계 경화제 또는 킬레이트 경화제를 사용하는 것을 특징으로 하는 OCA 필름용 점접착 조성물.
The method of claim 1,
The thermosetting agent is an aziridine-based curing agent, epoxy-based curing agent, isocyanate-based curing agent or chelate curing agent, characterized in that the adhesive composition for OCA film, characterized in that.
제 6 항에 있어서,
상기 이소시아네이트계 열경화제는 2,4-톨루엔디이소시아네이트(2,4-TDI), 2,6-톨루엔디이소시아네이트(2,6-TDI), 4,4'-디페닐메탄디이소시아네이트(MDI), 4,4'-디시클로헥실메탄디이소시아네이트 (H12MDl), 1,5-나프탈렌디이소시아네이트(NDI), 1,6-헥사메틸렌디이소시아네이트(HDI), 자일렌디이소시아네이트(XDI), 이소포론디이소시아네이트(IPDI) 및 3-이소시아네이토메틸-3,5,5-트리메틸시클로헥실디이소시아네이트(TMDI) 중에서 선택된 1종 또는 2종 이상의 화합물인 것을 특징으로 하는 OCA 필름용 점접착 조성물.
The method according to claim 6,
The isocyanate-based thermosetting agent is 2,4-toluene diisocyanate (2,4-TDI), 2,6-toluene diisocyanate (2,6-TDI), 4,4'-diphenylmethane diisocyanate (MDI), 4,4'-dicyclohexyl methane diisocyanate (H12MDl), 1,5-naphthalene diisocyanate (NDI), 1,6-hexamethylene diisocyanate (HDI), xylene diisocyanate (XDI), isophorone diisocyanate ( IPDI) and 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl diisocyanate (TMDI) is one or two or more compounds selected from the group consisting of an adhesive adhesive for OCA films.
제 1 항에 있어서,
상기 열경화제는 자외선 경화형 점착 수지 조성물 100 중량부에 대하여 0.05 ~ 5 중량부가 포함되는 것을 특징으로 하는 OCA 필름용 점접착 조성물.
The method of claim 1,
The thermosetting agent is an adhesive bonding composition for OCA film, characterized in that 0.05 to 5 parts by weight based on 100 parts by weight of the ultraviolet curable pressure-sensitive adhesive resin composition.
제 1 항에 있어서,
상기 광개시제는 벤조페논, N,N'-테트라메틸-4,4'-디아미노벤조페논(미힐러케톤), N,N'-테트라에틸-4,4'-디아미노벤조페논, 4-메톡시-4'-디메틸아미노벤조페논, 2-벤질-2-디메틸아미노-1-(4-몰포리노페닐)-부타논-1,2,2-디메톡시-1,2-디페닐에탄-1-온, 1-히드록시-시클로헥실-페닐-케톤, 2-메틸-1-(4-(메틸티오)페닐)-2-몰포리노프로파논-1,2,4-디에틸티옥산톤, 2-에틸안트라퀴논 및 페난트렌퀴논의 방향족 케톤; 벤조인메틸에테르, 벤조인에틸에테르 및 벤조인페닐에테르의 벤조인에테르; 메틸벤조인 및 에틸벤조인의 벤조인; 벤질디메틸케탈의 벤질 유도체; 2-(o-클로로페닐)-4,5-디페닐이미다졸 이량체, 2-(o-클로로페닐)-4,5-디(m-메톡시페닐)이미다졸 이량체, 2-(o-플루오로페닐)-4,5-페닐이미다졸 이량체, 2-(o-메톡시페닐)-4,5-디페닐이미다졸 이량체, 2-(p-메톡시페닐)-4,5-디페닐이미다졸 이량체, 2,4-디(p-메톡시페닐)-5-페닐이미다졸 이량체 및 2-(2,4-디메톡시페닐)-4,5-디페닐이미다졸 이량체의 2,4,5-트리아릴이미다졸 이량체; 9-페닐아크리딘 및 1,7-비스(9,9'-아크리디닐)헵탄의 아크리딘 유도체; 비스(2,6-디메톡시벤조일)-2,4,4-트리메틸-펜틸포스핀옥사이드 중에서 선택된 1종 이상인 것을 특징으로 하는 OCA 필름용 점접착 조성물.
The method of claim 1,
The photoinitiator is benzophenone, N, N'-tetramethyl-4,4'-diaminobenzophenone (Mihilerketone), N, N'-tetraethyl-4,4'-diaminobenzophenone, 4-methine Methoxy-4'-dimethylaminobenzophenone, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1,2,2-dimethoxy-1,2-diphenylethane-1 -One, 1-hydroxycyclohexyl-phenyl-ketone, 2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropanone-1,2,4-diethylthioxanthone, Aromatic ketones of 2-ethylanthraquinone and phenanthrenequinone; Benzoin methyl ether, benzoin ethyl ether, and benzoin phenyl ether; Benzoin of methyl benzoin and ethyl benzoin; Benzyl derivatives of benzyldimethylketal; 2- (o-chlorophenyl) -4,5-di (m-methoxyphenyl) imidazole dimer, 2- ( (o-methoxyphenyl) -4,5-diphenylimidazole dimer, 2- (p-methoxyphenyl) -4,5-phenylimidazole dimer, 2- 4,5-diphenylimidazole dimer, 2,4-di (p-methoxyphenyl) -5-phenylimidazole dimer and 2- (2,4-dimethoxyphenyl) 2,4,5-triarylimidazole dimer of diphenylimidazole dimer; Acridine derivatives of 9-phenylacridine and 1,7-bis (9,9'-acridinyl) heptane; Bis (2,6-dimethoxybenzoyl) -2,4,4-trimethyl-pentylphosphine oxide, at least one member selected from the group consisting of an adhesive adhesive for OCA films.
제 1 항에 있어서,
상기 광개시제는 자외선 경화형 점착 수지 조성물 100 중량부에 대하여 0.1 ~ 10 중량부가 사용되는 것을 특징으로 하는 OCA 필름용 점접착 조성물.
The method of claim 1,
The photoinitiator is an adhesive bonding composition for OCA film, characterized in that 0.1 to 10 parts by weight based on 100 parts by weight of the ultraviolet curable pressure-sensitive adhesive resin composition.
제 1 항 내지 제 10 항 중 선택된 어느 한 항에 있어서,
상기 조성물은 자외선 경화 후 박리력이 감소하는 것을 특징으로 하는 OCA 필름용 점접착 조성물.
The method according to any one of claims 1 to 10,
The composition is an adhesive adhesive composition for OCA film, characterized in that the peel force after UV curing is reduced.
알킬 아크릴레이트 및 관능기를 가지는 단량체를 중합하여 아크릴레이트계 중합체를 얻는 단계;
상기 중합체에 이소시아네이트기 또는 글리시딜기를 가지는 아크릴레이트를 투입하고 반응시켜 자외선 경화형 점착 수지를 얻는 단계;
상기 점착 수지에 열경화제 및 광개시제를 넣고 혼합 조성물을 얻는 단계; 및
상기 혼합 조성물을 코팅하고 50 ~ 150 ℃로 가열하여 경화하는 단계를 포함하는 것을 특징으로 하는 재 작업이 용이한 OCA(Optically clear adhesive) 필름의 제조방법.
Polymerizing an alkyl acrylate and a monomer having a functional group to obtain an acrylate polymer;
Adding an acrylate having an isocyanate group or glycidyl group to the polymer and reacting to obtain an ultraviolet curable pressure sensitive adhesive resin;
Adding a thermosetting agent and a photoinitiator to the adhesive resin to obtain a mixed composition; And
Coating the mixed composition and curing by heating to 50 ~ 150 ℃ a method for producing a rework easy OCA (Optically clear adhesive) film, characterized in that it comprises.
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