KR102088171B1 - Adhesive layer and adhesive film - Google Patents

Adhesive layer and adhesive film Download PDF

Info

Publication number
KR102088171B1
KR102088171B1 KR1020180076826A KR20180076826A KR102088171B1 KR 102088171 B1 KR102088171 B1 KR 102088171B1 KR 1020180076826 A KR1020180076826 A KR 1020180076826A KR 20180076826 A KR20180076826 A KR 20180076826A KR 102088171 B1 KR102088171 B1 KR 102088171B1
Authority
KR
South Korea
Prior art keywords
meth
pressure
adhesive layer
sensitive adhesive
film
Prior art date
Application number
KR1020180076826A
Other languages
Korean (ko)
Other versions
KR20180079280A (en
Inventor
타케시 나가쿠라
류스케 시마구치
료 하세가와
Original Assignee
후지모리 고교 가부시키가이샤
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=50904477&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=KR102088171(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 후지모리 고교 가부시키가이샤 filed Critical 후지모리 고교 가부시키가이샤
Publication of KR20180079280A publication Critical patent/KR20180079280A/en
Priority to KR1020190148179A priority Critical patent/KR102270910B1/en
Application granted granted Critical
Publication of KR102088171B1 publication Critical patent/KR102088171B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/385—Acrylic polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives 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
    • C09J133/04—Homopolymers or copolymers of esters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • H01L51/50—

Abstract

본 발명은 두께 1㎛∼20㎛의 박막에도 불구하고 고점착력, 고밀착성의 성능을 갖는 점착제층 및 그것을 사용한 점착 필름을 제공한다.
본 발명은 아크릴계 폴리머로 이루어지는 점착제 조성물을 가교시켜 이루어지는 점착제층에 있어서, 상기 점착제 조성물이, 주성분인 (메타)아크릴레이트 모노머로서 알킬기의 탄소수가 C1∼C14인 알킬(메타)아크릴레이트 모노머의 적어도 1종 이상을 함유하고, 다른 공중합성 모노머로서 질소 함유 비닐 모노머의 적어도 1종 이상과, 카르복실기를 함유하는 공중합성 비닐 모노머 및/또는 히드록실기를 함유하는 공중합성 비닐 모노머의 적어도 1종 이상을 함유하며, 상기 점착제층의 두께가 1㎛∼20㎛이고, 두께가 5㎛일 때의 점착력이 4.0(N/25㎜) 이상인 점착제층을 제공한다.The present invention provides a pressure-sensitive adhesive layer having a high adhesive strength and high adhesion performance despite a thin film having a thickness of 1 μm to 20 μm and an adhesive film using the same.
In the present invention, in the pressure-sensitive adhesive layer formed by crosslinking the pressure-sensitive adhesive composition made of an acrylic polymer, the pressure-sensitive adhesive composition is at least 1 of an alkyl (meth) acrylate monomer having a C1 to C14 alkyl group as the main component (meth) acrylate monomer. It contains at least one kind, and contains at least one kind of a nitrogen-containing vinyl monomer as another copolymerizable monomer, and at least one kind of a copolymerizable vinyl monomer containing a carboxyl group and / or a copolymerizable vinyl monomer containing a hydroxyl group. It provides an adhesive layer having a thickness of 1 µm to 20 µm and an adhesive strength of 4.0 (N / 25 mm) or more when the thickness of the adhesive layer is 5 µm.

Description

점착제층 및 점착 필름{ADHESIVE LAYER AND ADHESIVE FILM}Adhesive layer and adhesive film {ADHESIVE LAYER AND ADHESIVE FILM}

본 발명은 광학 부재의 층간 첩합 등에 사용되는, 두께 1㎛∼20㎛의 박막에도 불구하고 고점착력, 고밀착성의 성능을 갖는 점착제층 및 그것을 사용한 점착 필름에 관한 것이다.The present invention relates to a pressure-sensitive adhesive layer having high adhesion and high adhesion performance despite a thin film having a thickness of 1 μm to 20 μm, which is used for interlayer bonding of optical members, and the like, and an adhesive film using the same.

점착제층을 개재하여 편광판, 위상차판 등의 광학 부재를 액정 셀 등의 피착체에 첩합하기 위해, 다양한 점착 필름이 제안되어 있다(예를 들면, 특허문헌 1∼2 참조).Various adhesive films are proposed in order to bond optical members, such as a polarizing plate and a phase difference plate, to adherends, such as a liquid crystal cell, via an adhesive layer (for example, refer patent documents 1-2).

특허문헌 1에는, 부틸아크릴레이트 등을 주성분 모노머로 하고 아크릴아미드 화합물 등을 함유하는 광학용 점착제 조성물이 기재되어 있다.Patent Document 1 describes an optical pressure-sensitive adhesive composition containing butyl acrylate or the like as a main component monomer and containing an acrylamide compound or the like.

특허문헌 2에는, 탄소수 4∼8의 알킬기를 갖는 (메타)아크릴레이트를 주성분 모노머로 하고, 카르복실기 함유 모노머 및 질소 함유 비닐 모노머를 함유하는 광학용 점착제 조성물이 기재되어 있다.Patent Document 2 discloses an optical pressure-sensitive adhesive composition containing a (meth) acrylate having an alkyl group having 4 to 8 carbon atoms as a main component monomer and containing a carboxyl group-containing monomer and a nitrogen-containing vinyl monomer.

또한, 점착제층의 굴절률을 높이기 위해 다양한 연구를 한 점착 필름이 제안되어 있다(예를 들면, 특허문헌 3∼8 참조).In addition, adhesive films having various studies have been proposed in order to increase the refractive index of the adhesive layer (for example, see Patent Documents 3 to 8).

특허문헌 3에는, 방향족 고리를 갖고 굴절률 1.51∼1.75의 점착 부여제(tackifier)를 함유하는 광학용 점착제 조성물이 기재되어 있다.Patent document 3 describes an optical pressure-sensitive adhesive composition having an aromatic ring and containing a tackifier having a refractive index of 1.51 to 1.75.

특허문헌 4에는, 방향족 고리를 함유하는 아크릴산 변성 모노머의 공중합성 폴리머를 포함하는 점착제 조성물을 사용한 점착 시트가 기재되어 있다.Patent document 4 discloses an adhesive sheet using an adhesive composition containing a copolymerizable polymer of an acrylic acid-modified monomer containing an aromatic ring.

특허문헌 5에는, 방향족 고리를 갖는 점착 부여 수지와 방향족 인산에스테르계 가소제를 함유하는 광학용 점착제 조성물이 기재되어 있다.Patent Document 5 discloses an optical pressure-sensitive adhesive composition containing an tackifying resin having an aromatic ring and an aromatic phosphate ester plasticizer.

특허문헌 6에는, 아크릴계 수지와 에틸렌성 불포화기를 1개 함유하는 방향족 화합물을 함유하는 점착제 조성물이 경화되어 이루어지는 점착제가 기재되어 있다.Patent document 6 describes an adhesive in which an adhesive composition containing an acrylic resin and an aromatic compound containing one ethylenically unsaturated group is cured.

특허문헌 7에는, 방향족 모노머를 함유하는 아크릴계 점착제를 개재하여 위상차 필름 및 복굴절판을 서로 고착시켜 이루어지는 광학 부품이 기재되어 있다.Patent Document 7 describes an optical component formed by fixing a retardation film and a birefringent plate to each other via an acrylic pressure-sensitive adhesive containing an aromatic monomer.

특허문헌 8에는, 방향족 디이소시아네이트와 방향족 폴리에스테르디올을 반응시켜 이루어지는 우레탄 수지를 포함하는 점착제 조성물이 기재되어 있다.Patent document 8 discloses an adhesive composition comprising a urethane resin formed by reacting an aromatic diisocyanate with an aromatic polyester diol.

일본 공개특허공보 2012-177022호Japanese Laid-Open Patent Publication 2012-177022 일본 공개특허공보 2012-201734호Japanese Laid-Open Patent Publication 2012-201734 일본 공개특허공보 2007-084762호Japanese Patent Publication No. 2007-084762 일본 공개특허공보 2011-153169호Japanese Laid-Open Patent Publication 2011-153169 일본 공개특허공보 2012-167188호Japanese Laid-Open Patent Publication 2012-167188 일본 공개특허공보 2012-021148호Japanese Laid-Open Patent Publication 2012-021148 일본 공개특허공보 2006-293281호Japanese Patent Laid-Open No. 2006-293281 일본 공개특허공보 2009-091522호Japanese Unexamined Patent Publication No. 2009-091522

근래에 있어서, 광학 부재의 층간을 첩합하기 위해 사용되는 점착 필름에 대해 요구되고 있는 것은, 광학 부재의 박막화를 도모하기 위해 점착제층의 두께를 20㎛ 이하로 얇게 한 점착 필름으로 하는 것이다.In recent years, what is required for the pressure-sensitive adhesive film used to bond the layers of the optical member is to provide a pressure-sensitive adhesive film having a thickness of the pressure-sensitive adhesive layer of 20 µm or less in order to reduce the thickness of the optical member.

일반적으로, 점착제층의 점착력은 점착제층의 두께에 대략 비례한다는 점에서, 점착제층의 두께를 얇게 하면 거기에 수반되어 점착력이 저하된다.In general, since the adhesive force of the pressure-sensitive adhesive layer is roughly proportional to the thickness of the pressure-sensitive adhesive layer, when the thickness of the pressure-sensitive adhesive layer is reduced, the adhesive force is lowered.

그러나, 근래에 점착 필름은 점착제층의 두께를 얇게 해도, 종래의 점착 필름(점착제층의 두께가 약 30㎛로 두껍다)과 동등한 점착력을 가지면서, 또한 고온·고습도 분위기하에 장시간 방치한 후의 내구성에 있어서도 종래의 점착 필름과 동등 이상의 성능을 갖는 것이 요구되고 있다.However, in recent years, even if the thickness of the pressure-sensitive adhesive layer is thin, the pressure-sensitive adhesive film has the same adhesive strength as that of a conventional pressure-sensitive adhesive film (the thickness of the pressure-sensitive adhesive layer is about 30 µm), and is also durable after being left in a high temperature and high humidity atmosphere for a long time. Also, it is required to have a performance equal to or higher than that of a conventional adhesive film.

또한, 점착제층의 두께를 얇게 할 수 있고, 및 에이징 처리(항온에서 양생을 행하는 것)를 실시할 필요가 없는 점착제층을 형성할 수 있다는 점에서, 점착 필름의 기재를 생략한 점착제층만으로 이루어지는 「이형 필름/점착제층/이형 필름」의 부재 구성으로 한 NCF(Non Carrier Film)의 형태로 하는 것이 요구되고 있다.In addition, since the pressure-sensitive adhesive layer can be made thin, and the pressure-sensitive adhesive layer which does not need to undergo aging treatment (curing at constant temperature) can be formed, the pressure-sensitive adhesive layer is made of only the pressure-sensitive adhesive layer. It has been desired to form a non-carrier film (NCF) having a member structure of "release film / adhesive layer / release film".

또한, 종래의 점착 필름에서는 피착체에 점착 필름을 첩합한 후에 에이징 처리를 실시함으로써, 피착체와 점착제층의 밀착성이 향상되었다.In addition, in the conventional adhesive film, the adhesiveness between the adherend and the pressure-sensitive adhesive layer was improved by performing an aging treatment after bonding the adhesive film to the adherend.

그러나, NCF의 형태를 한 점착 필름은 피착체에 점착 필름을 첩합하기 전에 이미 점착제층의 에이징이 종료되어 있다는 점에서, 피착체와 점착제층의 밀착력이 부족해진다. 이 때문에, 피착체의 표면에 대해서 코로나 처리 등의 표면 처리를 실시할 필요가 있다는 문제가 있었다.However, the adhesive film in the form of NCF lacks the adhesive force between the adherend and the pressure-sensitive adhesive layer in that the aging of the pressure-sensitive adhesive layer has already been completed before the pressure-sensitive adhesive film is pasted onto the adherend. For this reason, there is a problem that it is necessary to perform surface treatment such as corona treatment on the surface of the adherend.

이들 요구 사항 및 문제를 극복한 점착 필름이 필요로 되고 있다.There is a need for an adhesive film that overcomes these requirements and problems.

본 발명은 상기 사정을 감안하여 이루어진 것이며, 두께 1㎛∼20㎛의 박막에도 불구하고 고점착력, 고밀착성의 성능을 갖는 점착제층 및 그것을 사용한 점착 필름을 제공하는 것을 과제로 한다.The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pressure-sensitive adhesive layer having high adhesion and high adhesion performance despite a thin film having a thickness of 1 μm to 20 μm, and an adhesive film using the same.

상기 과제를 해결하기 위해, 본 발명은 아크릴계 폴리머로 이루어지는 점착제 조성물을 가교시켜 이루어지는 점착제층에 있어서, 알킬기의 탄소수가 C1∼C14인 알킬(메타)아크릴레이트 모노머의 적어도 1종을 주성분 모노머로 하고, 다른 공중합성 모노머로서 공중합 가능한 질소 함유 비닐 모노머의 적어도 1종 이상을 함유시켜 공중합 및 가교시킴으로써, 강인한 점착력과 고밀착성의 성능을 갖는 점착제층으로 하는 것을 기술 사상으로 하고 있다.In order to solve the above problems, the present invention, in the pressure-sensitive adhesive layer formed by crosslinking the pressure-sensitive adhesive composition made of an acrylic polymer, at least one kind of alkyl (meth) acrylate monomer having a C1 to C14 alkyl group as a main component monomer, As another copolymerizable monomer, the technical idea is to make an adhesive layer having strong adhesive strength and high adhesion performance by containing at least one kind of copolymerizable nitrogen-containing vinyl monomer and copolymerizing and crosslinking.

또한, 상기 과제를 해결하기 위해, 본 발명은 아크릴계 폴리머로 이루어지는 점착제 조성물을 가교시켜 이루어지는 점착제층에 있어서, 상기 점착제 조성물이, 주성분인 (메타)아크릴레이트 모노머로서 알킬기의 탄소수가 C1∼C14인 알킬(메타)아크릴레이트 모노머의 적어도 1종 이상을 함유하고, 다른 공중합성 모노머로서 질소 함유 비닐 모노머의 적어도 1종 이상과, 카르복실기를 함유하는 공중합성 비닐 모노머 및/또는 히드록실기를 함유하는 공중합성 비닐 모노머의 적어도 1종 이상을 함유하며, 상기 점착제층의 두께가 1㎛∼20㎛이고, 두께가 5㎛일 때의 점착력이 4.0(N/25㎜) 이상인 점착제층을 제공한다.In addition, in order to solve the above problems, the present invention provides a pressure-sensitive adhesive layer formed by cross-linking the pressure-sensitive adhesive composition made of an acrylic polymer, wherein the pressure-sensitive adhesive composition is a main component (meth) acrylate monomer having an alkyl group having C1 to C14 alkyl. Copolymer containing at least one type of (meth) acrylate monomer, at least one kind of nitrogen-containing vinyl monomer as another copolymerizable monomer, and a copolymerizable vinyl monomer containing a carboxyl group and / or a hydroxyl group Provided is an adhesive layer containing at least one kind of vinyl monomer, the adhesive layer having a thickness of 1 µm to 20 µm, and an adhesive force of 4.0 (N / 25 mm) or more when the thickness is 5 µm.

또한, 상기 점착제 조성물이, (A) 알킬기의 탄소수가 C1∼C14인 알킬(메타)아크릴레이트 모노머의 적어도 1종 이상을 포함한 주성분인 (메타)아크릴레이트 모노머 100중량부에 대해서, (B) 질소 함유 비닐 모노머의 1종 이상을 5∼50중량부와, (C) 카르복실기를 함유하는 공중합성 비닐 모노머 및/또는 히드록실기를 함유하는 공중합성 비닐 모노머의 적어도 1종 이상을 0.1∼5중량부 함유하는 중량 평균 분자량 20만∼200만의 공중합체, 및 (D) 가교제를 0.01∼5중량부 함유하는 것이 바람직하다.Moreover, (B) nitrogen with respect to 100 weight part of (meth) acrylate monomers which the said adhesive composition contains (A) at least 1 sort (s) of the alkyl (meth) acrylate monomer whose C1-C14 alkyl group has carbon number is (B) nitrogen 5 to 50 parts by weight of one or more of the vinyl monomers contained, and 0.1 to 5 parts by weight of (C) a copolymerizable vinyl monomer containing a carboxyl group and / or a copolymerizable vinyl monomer containing a hydroxyl group. It is preferable to contain 0.01 to 5 parts by weight of a copolymer having a weight average molecular weight of 200,000 to 2,000,000, and a crosslinking agent (D).

또한, 상기 점착제 조성물이 상기 주성분인 (메타)아크릴레이트 모노머 100중량부 중, 메틸아크릴레이트 모노머를 20중량부 이상의 비율로 함유하는 것이 바람직하다.In addition, it is preferable that the pressure-sensitive adhesive composition contains a methyl acrylate monomer in a proportion of 20 parts by weight or more out of 100 parts by weight of the (meth) acrylate monomer as the main component.

또한, 상기 점착제 조성물이 상기 주성분인 (메타)아크릴레이트 모노머 100중량부에 대해서, 카르복실기를 함유하는 공중합성 비닐 모노머의 1종 이상을 2.0중량부 이하, 및/또는 히드록실기를 함유하는 공중합성 비닐 모노머의 1종 이상을 5.0중량부 이하의 비율로 함유하는 것이 바람직하다.In addition, with respect to 100 parts by weight of the (meth) acrylate monomer in which the pressure-sensitive adhesive composition is the main component, at least one part of a copolymerizable vinyl monomer containing a carboxyl group is 2.0 parts by weight or less, and / or copolymerization containing a hydroxyl group. It is preferable to contain one or more types of vinyl monomers in a proportion of 5.0 parts by weight or less.

또한, 상기 점착제층의 굴절률이 1.47∼1.50인 것이 바람직하다.Moreover, it is preferable that the refractive index of the said adhesive layer is 1.47-1.50.

또한, 본 발명은 상기 점착제층이 이형 필름의 한쪽 면에 형성되어 이루어지고, 이형 필름/점착제층/이형 필름의 구성인 점착 필름을 제공한다.In addition, the present invention provides a pressure-sensitive adhesive film that is made of the pressure-sensitive adhesive layer is formed on one side of the release film, the configuration of the release film / adhesive layer / release film.

또한, 본 발명은 기재의 한쪽 면 위에 상기 점착제층이 적층되어 이루어지는 점착 필름을 제공한다.In addition, the present invention provides an adhesive film formed by laminating the pressure-sensitive adhesive layer on one side of the substrate.

또한, 본 발명은 상기 점착 필름이 사용된 편광판의 주변 부재용 필름을 제공한다.In addition, the present invention provides a film for the peripheral member of the polarizing plate is the adhesive film is used.

또한, 본 발명은 상기 점착 필름이 사용된 터치 패널용 필름을 제공한다.In addition, the present invention provides a film for a touch panel using the adhesive film.

또한, 본 발명은 상기 점착 필름이 사용된 전자 종이용 필름을 제공한다.In addition, the present invention provides a film for electronic paper using the adhesive film.

또한, 본 발명은 상기 점착 필름이 사용된 유기 일렉트로 루미네센스용 필름을 제공한다.In addition, the present invention provides a film for organic electroluminescence in which the adhesive film is used.

또한, 본 발명은 광학 필름의 적어도 일방의 면에 상기 점착제층이 적층되어 이루어지는 점착제층이 형성된 광학 필름을 제공한다.In addition, the present invention provides an optical film having a pressure-sensitive adhesive layer formed by laminating the pressure-sensitive adhesive layer on at least one side of the optical film.

본 발명에 의하면, 종래의 요구 사항 및 문제를 극복하여 두께 1㎛∼20㎛의 박막에도 불구하고 고점착력, 고밀착성의 성능을 갖는 점착제층 및 그것을 사용한 점착 필름을 제공할 수 있다.According to the present invention, it is possible to provide a pressure-sensitive adhesive layer and a pressure-sensitive adhesive film using the same, which overcomes the conventional requirements and problems and has high adhesive strength and high adhesion performance despite thin films having a thickness of 1 μm to 20 μm.

이하, 바람직한 실시형태에 기초하여 본 발명을 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated based on preferable embodiment.

본 발명의 점착제층은 아크릴계 폴리머로 이루어지는 점착제 조성물을 가교시켜 이루어지는 점착제층에 있어서, 상기 점착제 조성물이 주성분인 (메타)아크릴레이트 모노머로서 알킬기의 탄소수가 C1∼C14인 알킬(메타)아크릴레이트 모노머의 적어도 1종 이상을 함유하고, 다른 공중합성 모노머로서 질소 함유 비닐 모노머의 적어도 1종 이상과, 카르복실기를 함유하는 공중합성 비닐 모노머 및/또는 히드록실기를 함유하는 공중합성 비닐 모노머의 적어도 1종 이상을 함유하며, 상기 점착제층의 두께가 1㎛∼20㎛이고, 두께가 5㎛일 때의 점착력이 4.0(N/25㎜) 이상이다.The pressure-sensitive adhesive layer of the present invention is a pressure-sensitive adhesive layer formed by crosslinking the pressure-sensitive adhesive composition made of an acrylic polymer, wherein the pressure-sensitive adhesive composition is a (meth) acrylate monomer as a main component of an alkyl group having C1 to C14 alkyl (meth) acrylate monomers. At least one kind of a copolymerizable vinyl monomer containing at least one kind, a copolymerizable vinyl monomer containing a carboxyl group, and / or a hydroxyl group containing at least one kind of a nitrogen-containing vinyl monomer as another copolymerizable monomer, and a carboxyl group. It contains, the thickness of the pressure-sensitive adhesive layer is 1㎛ to 20㎛, the adhesive force when the thickness is 5㎛ is 4.0 (N / 25㎜) or more.

알킬기의 탄소수가 C1∼C14인 알킬(메타)아크릴레이트 모노머로는, 메틸(메타)아크릴레이트, 에틸(메타)아크릴레이트, 프로필(메타)아크릴레이트, 이소프로필(메타)아크릴레이트, 부틸(메타)아크릴레이트, 이소부틸(메타)아크릴레이트, 펜틸(메타)아크릴레이트, 헥실(메타)아크릴레이트, 헵틸(메타)아크릴레이트, 옥틸(메타)아크릴레이트, 이소옥틸(메타)아크릴레이트, 2-에틸헥실(메타)아크릴레이트, 노닐(메타)아크릴레이트, 이소노닐(메타)아크릴레이트, 데실(메타)아크릴레이트, 운데실(메타)아크릴레이트, 도데실(메타)아크릴레이트, 트리데실(메타)아크릴레이트, 테트라데실(메타)아크릴레이트, 시클로펜틸(메타)아크릴레이트, 시클로헥실(메타)아크릴레이트 등의 적어도 1종 이상을 들 수 있다. 알킬(메타)아크릴레이트 모노머의 알킬기는 직쇄, 분기형, 고리형 중 어느 것이어도 된다. 알킬기의 탄소수가 C1∼C14인 (메타)아크릴산에스테르 모노머는, 점착제 조성물의 아크릴계 폴리머(공중합체) 100중량부에 대한 비율이 50∼95중량부인 것이 바람직하다.Examples of the alkyl (meth) acrylate monomer having C 1 to C 14 carbon atoms in the alkyl group include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, and butyl (meth) ) Acrylate, isobutyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, 2- Ethylhexyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, undecyl (meth) acrylate, dodecyl (meth) acrylate, tridecyl (meth) ) Acrylate, tetradecyl (meth) acrylate, cyclopentyl (meth) acrylate, cyclohexyl (meth) acrylate, and the like. The alkyl group of the alkyl (meth) acrylate monomer may be linear, branched or cyclic. The (meth) acrylic acid ester monomer having C1 to C14 carbon atoms in the alkyl group is preferably 50 to 95 parts by weight in proportion to 100 parts by weight of the acrylic polymer (copolymer) of the pressure-sensitive adhesive composition.

또한, 본 발명에 따른 점착제층에 있어서는, 점착제 조성물이 알킬기의 탄소수가 C1∼C14인 알킬(메타)아크릴레이트 모노머의 1종 이상으로 이루어지는 주성분인 (메타)아크릴레이트 모노머 100중량부 중, 메틸아크릴레이트 모노머를 20중량부 이상의 비율로 함유함으로써, 점착제층의 굴절률을 1.47 이상으로 높일 수 있다.Further, in the pressure-sensitive adhesive layer according to the present invention, the pressure-sensitive adhesive composition is methylacrylic in 100 parts by weight of the (meth) acrylate monomer, which is a main component composed of one or more of alkyl group (C1 to C14) alkyl (meth) acrylate monomers having an alkyl group. By containing a rate monomer in a proportion of 20 parts by weight or more, the refractive index of the pressure-sensitive adhesive layer can be increased to 1.47 or more.

본 발명에 따른 점착제 조성물에는, 주성분인 (메타)아크릴레이트 모노머로서 방향족기를 함유하는 (메타)아크릴레이트 모노머의 1종 이상을 추가로 함유시킬 수 있다. 방향족기를 함유하는 (메타)아크릴레이트 모노머로는, 벤질(메타)아크릴레이트, 나프틸(메타)아크릴레이트, 페녹시에틸(메타)아크릴레이트, 페녹시부틸(메타)아크릴레이트, 2-(1-나프틸옥시)에틸(메타)아크릴레이트, 2-(2-나프틸옥시)에틸(메타)아크릴레이트, 6-(1-나프틸옥시)헥실(메타)아크릴레이트, 6-(2-나프틸옥시)헥실(메타)아크릴레이트, 8-(1-나프틸옥시)옥틸(메타)아크릴레이트, 8-(2-나프틸옥시)옥틸(메타)아크릴레이트 등을 들 수 있다. 굴절률이 높은 점착제층을 얻기 위해서는, 방향족기를 함유하는 (메타)아크릴레이트 모노머의 적어도 1종 이상을 배합하는 것이 바람직하다.In the pressure-sensitive adhesive composition according to the present invention, one or more of (meth) acrylate monomers containing an aromatic group as the main component (meth) acrylate monomer can be further contained. As the (meth) acrylate monomer containing an aromatic group, benzyl (meth) acrylate, naphthyl (meth) acrylate, phenoxyethyl (meth) acrylate, phenoxybutyl (meth) acrylate, 2- (1 -Naphthyloxy) ethyl (meth) acrylate, 2- (2-naphthyloxy) ethyl (meth) acrylate, 6- (1-naphthyloxy) hexyl (meth) acrylate, 6- (2-naphth Tiloxy) hexyl (meth) acrylate, 8- (1-naphthyloxy) octyl (meth) acrylate, 8- (2-naphthyloxy) octyl (meth) acrylate, and the like. In order to obtain an adhesive layer having a high refractive index, it is preferable to blend at least one of (meth) acrylate monomers containing an aromatic group.

이들 방향족기를 함유하는 (메타)아크릴레이트 모노머를, 주성분 모노머인 알킬기의 탄소수가 C1∼C14인 알킬(메타)아크릴레이트 모노머와 혼합함으로써, 얻어지는 점착제층의 굴절률을 상승시켜 조정할 수 있고, 광학 부재간의 굴절률차를 줄여 전반사를 저감시킴으로써 전광선 투과율을 향상시킬 수 있다. 본 발명에 따른 점착제층에 있어서, 점착제 조성물에 방향족기를 함유하는 (메타)아크릴레이트 모노머를 함유시키는 경우에는, 주성분인 (메타)아크릴레이트 모노머 100중량부에 대해서 5∼30중량부의 비율로 함유시키는 것이 바람직하다.By mixing the (meth) acrylate monomer containing these aromatic groups with an alkyl (meth) acrylate monomer having C1 to C14 carbon atoms in the alkyl group as the main component monomer, the refractive index of the resulting pressure-sensitive adhesive layer can be increased and adjusted. By reducing the difference in refractive index, total light transmittance can be improved by reducing total reflection. In the pressure-sensitive adhesive layer according to the present invention, when the (meth) acrylate monomer containing an aromatic group is contained in the pressure-sensitive adhesive composition, it is contained in a proportion of 5 to 30 parts by weight with respect to 100 parts by weight of the (meth) acrylate monomer as a main component. It is preferred.

또한, 방향족기를 함유하는 (메타)아크릴레이트 모노머를 공중합시킴으로써, 상기 주성분인 (메타)아크릴레이트 모노머 100중량부 중 메틸아크릴레이트 모노머를 20중량부 이상의 비율로 함유시켜 점착제층의 굴절률을 높이는 효과보다, 점착제층의 굴절률을 더욱 높일 수 있다.Further, by copolymerizing the (meth) acrylate monomer containing an aromatic group, the methyl acrylate monomer in 100 parts by weight of the main component (meth) acrylate monomer is contained in a proportion of 20 parts by weight or more than the effect of increasing the refractive index of the pressure-sensitive adhesive layer. , It is possible to further increase the refractive index of the pressure-sensitive adhesive layer.

또한, 상기와 같이 점착제층의 굴절률을 높이는 방법으로서, 주성분인 (메타)아크릴레이트 모노머 100중량부 중 메틸아크릴레이트 모노머를 20중량부 이상의 비율로 함유시키는 방법과, 방향족기를 함유하는 (메타)아크릴레이트 모노머를 공중합시키는 방법의 두 가지 방법이 있고, 각각의 방법을 단독으로 채용할 수 있지만, 이 두 가지 방법을 병용하는 것이 보다 바람직하다.In addition, as a method of increasing the refractive index of the pressure-sensitive adhesive layer as described above, a method of containing a methyl acrylate monomer in a proportion of 20 parts by weight or more of 100 parts by weight of the main component (meth) acrylate monomer, and (meth) acrylic containing an aromatic group There are two methods of copolymerizing the rate monomer, and each method can be employed alone, but it is more preferable to use these two methods in combination.

질소 함유 비닐 모노머로는, 예를 들면 N-비닐피롤리돈, N-비닐카프로락탐, (메타)아크릴로일모르폴린 등의 고리형 질소 비닐 화합물, N-에틸-N-메틸(메타)아크릴아미드, N-메틸-N-프로필(메타)아크릴아미드, N-메틸-N-이소프로필(메타)아크릴아미드, N,N-디메틸(메타)아크릴아미드, N,N-디에틸(메타)아크릴아미드, N,N-디프로필(메타)아크릴아미드, N,N-디이소프로필(메타)아크릴아미드, N,N-디부틸(메타)아크릴아미드 등의 디알킬 치환 (메타)아크릴아미드, N-에틸-N-메틸아미노에틸(메타)아크릴레이트, N-메틸-N-프로필아미노에틸(메타)아크릴레이트, N-메틸-N-이소프로필아미노에틸(메타)아크릴레이트, N,N-디메틸아미노메틸(메타)아크릴레이트, N,N-디메틸아미노에틸(메타)아크릴레이트, N,N-디메틸아미노프로필(메타)아크릴레이트, N,N-디메틸아미노부틸(메타)아크릴레이트, N,N-디프로필아미노에틸(메타)아크릴레이트, N,N-디부틸아미노에틸(메타)아크릴레이트 등의 디알킬아미노(메타)아크릴레이트, N-에틸-N-메틸아미노프로필(메타)아크릴아미드, N-메틸-N-프로필아미노프로필(메타)아크릴아미드, N-메틸-N-이소프로필아미노프로필(메타)아크릴아미드, N,N-디메틸아미노프로필(메타)아크릴아미드, N,N-디에틸아미노프로필(메타)아크릴아미드, N,N-디프로필아미노프로필(메타)아크릴아미드, N,N-디메틸아미노에틸(메타)아크릴아미드, N,N-디에틸아미노에틸(메타)아크릴아미드 등의 디알킬 치환 아미노알킬(메타)아크릴아미드 등의 적어도 1종 이상을 들 수 있다.Examples of the nitrogen-containing vinyl monomer include cyclic nitrogen vinyl compounds such as N-vinylpyrrolidone, N-vinyl caprolactam, and (meth) acryloyl morpholine, and N-ethyl-N-methyl (meth) acrylic. Amide, N-methyl-N-propyl (meth) acrylamide, N-methyl-N-isopropyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylic Dialkyl substituted (meth) acrylamides such as amide, N, N-dipropyl (meth) acrylamide, N, N-diisopropyl (meth) acrylamide, N, N-dibutyl (meth) acrylamide, N -Ethyl-N-methylaminoethyl (meth) acrylate, N-methyl-N-propylaminoethyl (meth) acrylate, N-methyl-N-isopropylaminoethyl (meth) acrylate, N, N-dimethyl Aminomethyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, N, N-dimethylaminopropyl (meth) acrylate, N, N-dimethylaminobutyl (meth) acrylic Dialkylamino (meth) acrylates such as acrylate, N, N-dipropylaminoethyl (meth) acrylate and N, N-dibutylaminoethyl (meth) acrylate, N-ethyl-N-methylaminopropyl ( Meta) acrylamide, N-methyl-N-propylaminopropyl (meth) acrylamide, N-methyl-N-isopropylaminopropyl (meth) acrylamide, N, N-dimethylaminopropyl (meth) acrylamide, N , N-diethylaminopropyl (meth) acrylamide, N, N-dipropylaminopropyl (meth) acrylamide, N, N-dimethylaminoethyl (meth) acrylamide, N, N-diethylaminoethyl (meth And dialkyl-substituted aminoalkyl (meth) acrylamides such as acrylamide.

상기 질소 함유 비닐 모노머로는, 후술하는 (C)의 화합물과 구별 가능하게 하기 위해 수산기를 함유하지 않는 것이 바람직하고, 수산기 및 카르복실기를 함유하지 않는 것이 보다 바람직하다. 이러한 모노머로는 상기 예시한 모노머, 예를 들면, N,N-디알킬 치환 아미노기나 N,N-디알킬 치환 아미드기를 함유하는 아크릴계 모노머; N-비닐피롤리돈, N-비닐카프로락탐 등의 N-비닐 치환 락탐류; N-(메타)아크릴로일모르폴린 등의 N-(메타)아크릴로일 치환 고리형 아민류가 바람직하다.As said nitrogen-containing vinyl monomer, it is preferable not to contain a hydroxyl group, and it is more preferable not to contain a hydroxyl group and a carboxyl group in order to be distinguishable from the compound of (C) mentioned later. Examples of such monomers include the monomers exemplified above, for example, acrylic monomers containing N, N-dialkyl substituted amino groups or N, N-dialkyl substituted amide groups; N-vinyl substituted lactams such as N-vinyl pyrrolidone and N-vinyl caprolactam; N- (meth) acryloyl substituted cyclic amines such as N- (meth) acryloylmorpholine are preferred.

또한, 본 발명에 따른 점착제층에 있어서, 점착제 조성물에 함유시키는 질소 함유 비닐 모노머는 점착제층에 대해서 필요한 점착력 및 내구성을 부여시킬 수 있다. 본 발명에 따른 점착제층에 있어서, 점착제 조성물에 함유시키는 질소 함유 비닐 모노머는 주성분인 (메타)아크릴레이트 모노머 100중량부에 대해서 5∼50중량부인 것이 바람직하다.Further, in the pressure-sensitive adhesive layer according to the present invention, the nitrogen-containing vinyl monomer contained in the pressure-sensitive adhesive composition can impart the necessary adhesive strength and durability to the pressure-sensitive adhesive layer. In the pressure-sensitive adhesive layer according to the present invention, the nitrogen-containing vinyl monomer contained in the pressure-sensitive adhesive composition is preferably 5 to 50 parts by weight relative to 100 parts by weight of the (meth) acrylate monomer as a main component.

또한, 본 발명에 따른 점착제층에 있어서, 점착제 조성물에 함유시키는 질소 함유 비닐 모노머로는, N-비닐피롤리돈, N,N-디메틸(메타)아크릴아미드, N,N-디에틸(메타)아크릴아미드, N,N-디프로필(메타)아크릴아미드, N,N-디이소프로필(메타)아크릴아미드, N,N-디부틸(메타)아크릴아미드, N,N-디메틸아미노프로필(메타)아크릴아미드, N,N-디에틸아미노프로필(메타)아크릴아미드, N,N-디메틸아미노에틸(메타)아크릴아미드, N-비닐카프로락탐 등이 특히 바람직하게 사용된다.Further, in the pressure-sensitive adhesive layer according to the present invention, as the nitrogen-containing vinyl monomer contained in the pressure-sensitive adhesive composition, N-vinylpyrrolidone, N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) Acrylamide, N, N-dipropyl (meth) acrylamide, N, N-diisopropyl (meth) acrylamide, N, N-dibutyl (meth) acrylamide, N, N-dimethylaminopropyl (meth) Acrylamide, N, N-diethylaminopropyl (meth) acrylamide, N, N-dimethylaminoethyl (meth) acrylamide, N-vinyl caprolactam and the like are particularly preferably used.

카르복실기를 함유하는 공중합성 비닐 모노머(카르복실기 함유 모노머)로는, 예를 들면, (메타)아크릴산, 카르복시에틸(메타)아크릴레이트, 카르복시펜틸(메타)아크릴레이트, 2-(메타)아크릴로일옥시에틸헥사히드로프탈산, 2-(메타)아크릴로일옥시프로필헥사히드로프탈산, 2-(메타)아크릴로일옥시에틸프탈산, 2-(메타)아크릴로일옥시에틸숙신산, 2-(메타)아크릴로일옥시에틸말레산, 카르복시폴리카프로락톤모노(메타)아크릴레이트, 2-(메타)아크릴로일옥시에틸테트라히드로프탈산 등의 적어도 1종 이상을 들 수 있다.As a copolymerizable vinyl monomer containing a carboxyl group (carboxyl group-containing monomer), for example, (meth) acrylic acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, 2- (meth) acryloyloxyethyl Hexahydrophthalic acid, 2- (meth) acryloyloxypropyl hexahydrophthalic acid, 2- (meth) acryloyloxyethylphthalic acid, 2- (meth) acryloyloxyethylsuccinic acid, 2- (meth) acryloyl And oxyethylmaleic acid, carboxypolycaprolactone mono (meth) acrylate, 2- (meth) acryloyloxyethyltetrahydrophthalic acid, and the like.

또한, 본 발명에 따른 점착제층에 있어서, 점착제 조성물에 함유시키는 카르복실기 함유 모노머는 점착제층에 대해서 필요한 응집력을 부여시킬 수 있다. 본 발명에 따른 점착제층에 있어서, 점착제 조성물에 함유시키는 카르복실기 함유 모노머는 주성분인 (메타)아크릴레이트 모노머 100중량부에 대해서 0.1∼5중량부인 것이 바람직하다.In addition, in the pressure-sensitive adhesive layer according to the present invention, the carboxyl group-containing monomer contained in the pressure-sensitive adhesive composition can impart the necessary cohesive force to the pressure-sensitive adhesive layer. In the pressure-sensitive adhesive layer according to the present invention, the carboxyl group-containing monomer contained in the pressure-sensitive adhesive composition is preferably 0.1 to 5 parts by weight based on 100 parts by weight of the (meth) acrylate monomer as a main component.

히드록실기를 함유하는 공중합성 비닐 모노머(히드록실기 함유 모노머)로는, 예를 들면, 8-히드록시옥틸(메타)아크릴레이트, 6-히드록시헥실(메타)아크릴레이트, 4-히드록시부틸(메타)아크릴레이트, 히드록시에틸(메타)아크릴레이트 등의 히드록시알킬(메타)아크릴레이트류나, N-히드록시(메타)아크릴아미드, N-히드록시메틸(메타)아크릴아미드, N-히드록시에틸(메타)아크릴아미드 등의 히드록실기 함유 (메타)아크릴아미드류 등의 적어도 1종 이상을 들 수 있다.As a copolymerizable vinyl monomer containing a hydroxyl group (hydroxyl group-containing monomer), for example, 8-hydroxyoctyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 4-hydroxybutyl Hydroxyalkyl (meth) acrylates such as (meth) acrylate and hydroxyethyl (meth) acrylate, N-hydroxy (meth) acrylamide, N-hydroxymethyl (meth) acrylamide, and N-hydride And at least one or more such as hydroxyl group-containing (meth) acrylamides such as hydroxyethyl (meth) acrylamide.

또한, 본 발명에 따른 점착제층에 있어서, 점착제 조성물에 함유시키는 히드록실기 함유 모노머는, 얻어지는 점착제층이 투명 도전성 필름의 ITO 표면 등 부식되기 쉬운 피착체에 대한 부식성에 영향을 준다고 여겨지는, 카르복실기 함유 모노머의 함유량을 감소시키기 위한 공중합성 모노머로서 사용할 수 있다. 이 때문에, 히드록실기 함유 모노머는 점착제층의 점착력을 향상시키고, 또한 부식성을 저감시키기 위해 유용하게 쓸 수 있다. 본 발명에 따른 점착제층에 있어서, 점착제 조성물에 함유시키는 히드록실기 함유 모노머는 주성분인 (메타)아크릴레이트 모노머 100중량부에 대해서 0.1∼5중량부인 것이 바람직하다.In addition, in the pressure-sensitive adhesive layer according to the present invention, the hydroxyl group-containing monomer contained in the pressure-sensitive adhesive composition is believed to affect the corrosive properties of the transparent conductive film, such as the ITO surface, to corrosive adherends. It can be used as a copolymerizable monomer for reducing the content of the containing monomer. For this reason, the hydroxyl group-containing monomer can be usefully used to improve the adhesive strength of the pressure-sensitive adhesive layer and to reduce corrosion. In the pressure-sensitive adhesive layer according to the present invention, the hydroxyl group-containing monomer contained in the pressure-sensitive adhesive composition is preferably 0.1 to 5 parts by weight based on 100 parts by weight of the (meth) acrylate monomer as a main component.

본 발명의 점착제층에 사용되는 점착제 조성물의 공중합체는, (A) 알킬기의 탄소수가 C1∼C14인 알킬(메타)아크릴레이트 모노머의 적어도 1종 이상을 포함한 주성분인 (메타)아크릴레이트 모노머 100중량부에 대해서, (B) 질소 함유 비닐 모노머의 1종 이상을 5∼50중량부와, (C) 카르복실기를 함유하는 공중합성 비닐 모노머 및/또는 히드록실기를 함유하는 공중합성 비닐 모노머의 적어도 1종 이상을 0.1∼5중량부 함유하는 것이 바람직하다.The copolymer of the pressure-sensitive adhesive composition used in the pressure-sensitive adhesive layer of the present invention comprises: (A) 100 weight of (meth) acrylate monomer as a main component including at least one or more types of alkyl (meth) acrylate monomers having C1 to C14 alkyl groups. With respect to the part, (B) 5 to 50 parts by weight of at least one of the nitrogen-containing vinyl monomers, and (C) at least one of a copolymerizable vinyl monomer containing a carboxyl group and / or a copolymerizable vinyl monomer containing a hydroxyl group. It is preferable to contain 0.1-5 weight part or more of a species.

또한, 주성분인 (메타)아크릴레이트 모노머 100중량부에 대해서, 카르복실기를 함유하는 공중합성 비닐 모노머의 1종 이상을 2.0중량부 이하, 및/또는 히드록실기를 함유하는 공중합성 비닐 모노머의 1종 이상을 5.0중량부 이하의 비율로 함유하는 것이 바람직하다.Further, with respect to 100 parts by weight of the main component (meth) acrylate monomer, one or more of the copolymerizable vinyl monomer containing a carboxyl group is 2.0 parts by weight or less, and / or one of the copolymerizable vinyl monomers containing a hydroxyl group. It is preferable to contain more than 5.0 parts by weight or less.

공중합체의 중합 방법은 특별히 한정되지 않으며, 용액 중합법, 유화 중합법 등 적절히 공지된 중합 방법을 사용 가능하다. 공중합체의 중량 평균 분자량은 20만∼200만인 것이 바람직하다.The polymerization method of the copolymer is not particularly limited, and a suitable polymerization method such as a solution polymerization method or an emulsion polymerization method can be used. It is preferable that the weight average molecular weight of the copolymer is 200,000 to 2,000,000.

상기 공중합체는 아크릴계 폴리머인 것이 바람직하고, (메타)아크릴산에스테르 모노머나 (메타)아크릴산, (메타)아크릴아미드류 등의 아크릴계 모노머를 50∼100중량％ 포함하는 것이 바람직하다.The copolymer is preferably an acrylic polymer, and preferably contains 50 to 100% by weight of an acrylic monomer such as (meth) acrylic acid ester monomer, (meth) acrylic acid, or (meth) acrylamide.

상기 점착제 조성물은, 상기 공중합체에 가교제나 적절히 임의의 첨가제를 배합함으로써, 필요로 되는 물성값 등의 특성을 조정할 수 있다.The above-mentioned pressure-sensitive adhesive composition can adjust properties, such as a required physical property value, by mixing a crosslinking agent or an arbitrary additive suitably in the said copolymer.

가교제로는, 예를 들면, 헥사메틸렌디이소시아네이트, 이소포론디이소시아네이트, 디페닐메탄디이소시아네이트, 톨릴렌디이소시아네이트, 자일릴렌디이소시아네이트 등의 디이소시아네이트류의 뷰렛 변성체나 이소시아누레이트 변성체, 트리메틸올프로판이나 글리세린 등 3가 이상의 폴리올과의 어덕트체 등의 폴리이소시아네이트 화합물, 금속계 킬레이트 화합물, 에폭시 화합물 등의 적어도 1종 이상을 들 수 있다. 또한, 자외선 등 광가교에 의해 점착제를 가교시켜도 된다.Examples of the crosslinking agent include, for example, burette modified products of diisocyanates such as hexamethylene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, tolylene diisocyanate, and xylylene diisocyanate, and isocyanurate modified products, and trimethylol. And polyisocyanate compounds such as adducts with trivalent or higher polyols such as propane and glycerin, metal-based chelating compounds, and epoxy compounds. Moreover, you may crosslink an adhesive by photocrosslinking, such as ultraviolet rays.

가교제를 사용하여 공중합체를 가교시키는 경우, 공중합체가 가교제와 가교 반응 가능한 관능기(가교제의 종류에 따라서 다르지만, 히드록실기나 카르복실기 등)를 갖는 것이 바람직하고, 또한, 이들의 관능기를 측쇄에 갖는 모노머를 함유하는 것이 바람직하다. 또한, 점착제 조성물이 (D) 가교제를 0.01∼5중량부 함유하는 것이 바람직하다. 또한, 중량부의 기준은 상기 공중합체에 있어서의 (A) 내지 (C)와 동일하다.When crosslinking a copolymer using a crosslinking agent, it is preferable that the copolymer has a functional group capable of crosslinking reaction with a crosslinking agent (depending on the type of the crosslinking agent, but a hydroxyl group or a carboxyl group, etc.), and having these functional groups on the side chain It is preferred to contain monomers. Moreover, it is preferable that the adhesive composition contains (D) 0.01-5 weight part of crosslinking agents. In addition, the standard of the weight part is the same as (A) to (C) in the said copolymer.

그 외 임의의 성분으로서, 실란 커플링제, 산화 방지제, 계면활성제, 경화 촉진제, 가소제, 충전제, 가교 촉매, 가교 지연제, 경화 지연제, 가공 보조제, 노화 방지제 등의 공지된 첨가제를 적절하게 배합할 수 있다. 이들은 단독으로, 또는 2종 이상 함께 사용해도 된다.As other optional components, known additives such as silane coupling agents, antioxidants, surfactants, curing accelerators, plasticizers, fillers, crosslinking catalysts, crosslinking retarders, curing retarders, processing aids, and anti-aging agents can be suitably blended. You can. These may be used alone or in combination of two or more thereof.

본 발명의 점착제층은 상기 점착제 조성물을 기재나 이형 필름에 도포한 후, 점착제 조성물을 가교시킴으로써 얻을 수 있다.The adhesive layer of this invention can be obtained by crosslinking an adhesive composition after apply | coating the said adhesive composition to a base material or a release film.

광학 부재의 층간 첩합 등에 사용되는 경우, 얇은 점착제층인 것이 바람직하고, 상기 점착제층의 두께가 1㎛∼20㎛인 것이 바람직하다. 또한, 일반적으로 점착제층의 점착력은 점착제층의 두께에 대략 비례하고 있지만, 두께가 5㎛일 때의 점착력이 4.0(N/25㎜) 이상인 것이 바람직하다. 또한, 점착제층의 두께가 5㎛가 아닌 경우, 「두께가 5㎛일 때의 점착력」(N/25㎜)은 점착제층의 두께를 T(㎛), 점착제층의 점착력을 F(N/25㎜)로 하여, 수식 「(두께가 5㎛일 때의 점착력)〓5F/T」에 의해 추정할 수 있다.When used for interlayer bonding of an optical member, it is preferable that it is a thin pressure-sensitive adhesive layer, and the thickness of the pressure-sensitive adhesive layer is preferably 1 μm to 20 μm. In addition, in general, the adhesive strength of the pressure-sensitive adhesive layer is approximately proportional to the thickness of the pressure-sensitive adhesive layer, but it is preferable that the adhesive strength when the thickness is 5 μm is 4.0 (N / 25 mm) or more. In addition, when the thickness of the pressure-sensitive adhesive layer is not 5 μm, the “stickiness when the thickness is 5 μm” (N / 25 mm) is the thickness of the pressure-sensitive adhesive layer T (µm), the pressure-sensitive adhesive force of the pressure-sensitive adhesive layer is F (N / 25) Mm), it can be estimated by the formula "(adhesion force when the thickness is 5 µm) 〓5F / T".

본 발명에 따른 점착제층을 광학 부재의 층간 첩합 등에 사용하는 경우, 점착제층과 광학 부재의 계면에서의 광선의 반사를 저감시키기 위해, 굴절률차가 가능한 작은 것이 바람직하다. 이 때문에, 상기 점착제층의 굴절률이 1.47∼1.50인 것이 바람직하다.When the pressure-sensitive adhesive layer according to the present invention is used for interlayer bonding of an optical member or the like, in order to reduce reflection of light rays at the interface between the pressure-sensitive adhesive layer and the optical member, it is preferable that the refractive index difference is as small as possible. For this reason, it is preferable that the refractive index of the said adhesive layer is 1.47-1.50.

본 발명의 점착 필름은, 본 발명의 점착제층을 기재 또는 이형 필름의 한쪽 면 위에 형성함으로써 제조할 수 있다.The adhesive film of this invention can be manufactured by forming the adhesive layer of this invention on one surface of a base material or a release film.

점착제층의 형성에 사용되는 기재 필름이나 점착면을 보호하는 이형 필름(세퍼레이터)으로는, 폴리에스테르 필름 등의 수지 필름 등을 사용할 수 있다.As a base film used for formation of an adhesive layer or a release film (separator) which protects an adhesive surface, resin films, such as a polyester film, etc. can be used.

기재 필름에는 수지 필름의 점착제층이 형성된 측과는 반대 면에, 실리콘계, 불소계의 이형제나 코트제, 실리카 미립자 등에 의한 방오 처리, 대전 방지제의 도포나 혼입 등에 의한 대전 방지 처리를 실시할 수 있다.The base film may be subjected to an antistatic treatment by antifouling treatment with a silicone-based or fluorine-based release agent or coating agent or silica fine particles, or by application or mixing of an antistatic agent, on a surface opposite to the side on which the pressure-sensitive adhesive layer of the resin film is formed.

이형 필름에는 점착제층의 점착면과 맞춰지는 측의 면에, 실리콘계, 불소계의 이형제 등에 의해 이형 처리가 실시된다.A mold release process is performed to a release film with a silicone type, a fluorine-type release agent, etc. to the surface of the side matched with the adhesive face of an adhesive layer.

1개의 점착제층의 양면에 각각 이형 필름의 이형 처리가 실시된 면을 맞춤으로써, 「이형 필름/점착제층/이형 필름」의 구성으로 할 수도 있다. 이 경우, 양측의 이형 필름을 순차적으로, 혹은 동시에 박리하여 점착면을 표출시킴으로써, 광학 필름 등의 광학 부재와 첩합 가능하게 된다. 광학 필름으로는 편광 필름, 위상차 필름, 반사 방지 필름, 방현(안티 글레어) 필름, 자외선 흡수 필름, 적외선 흡수 필름, 광학 보상 필름, 휘도 향상 필름 등을 들 수 있다.It can also be set as the structure of a "release film / adhesive layer / release film" by aligning the surface on which the mold release process of the release film was performed to both surfaces of one adhesive layer, respectively. In this case, the release films on both sides are sequentially or simultaneously peeled to expose the adhesive surface, whereby it is possible to bond with optical members such as optical films. Examples of the optical film include a polarizing film, a retardation film, an antireflection film, an anti-glare (anti-glare) film, an ultraviolet absorbing film, an infrared absorbing film, an optical compensation film, and a brightness enhancing film.

본 발명의 점착 필름은, 편광판을 주로 하는 액정 표시 장치의 주변 부재용의 각종 광학 필름, 터치 패널용의 각종 광학 필름, 전자 종이용의 각종 광학 필름, 유기 일렉트로 루미네센스용의 각종 광학 필름 등의 첩합에 사용할 수 있다.The adhesive film of the present invention includes various optical films for peripheral members of a liquid crystal display device mainly comprising a polarizing plate, various optical films for a touch panel, various optical films for electronic paper, various optical films for organic electroluminescence, and the like. It can be used for bonding.

또한, 이들 광학 필름의 적어도 일방의 면에 상기 점착제층이 적층되어 이루어지는 점착제층이 형성된 광학 필름으로 할 수 있다. 구체적으로는, 「광학 필름/점착제층/광학 필름」, 「광학 필름/점착제층/이형 필름」, 「광학 필름/점착제층」, 「광학 필름/점착제층/광학 필름/점착제층/광학 필름」, 「광학 필름/점착제층/광학 필름/점착제층/이형 필름」, 「이형 필름/점착제층/광학 필름/점착제층/이형 필름」 등의 구성을 들 수 있다.Moreover, it can be set as the optical film in which the adhesive layer which the said adhesive layer is laminated | stacked on at least one surface of these optical films is formed. Specifically, "optical film / adhesive layer / optical film", "optical film / adhesive layer / release film", "optical film / adhesive layer", "optical film / adhesive layer / optical film / adhesive layer / optical film" , "Optical film / adhesive layer / optical film / adhesive layer / release film", "release film / adhesive layer / optical film / adhesive layer / release film" and the like.

예를 들면, 「광학 필름/점착제층/이형 필름」과 같이 이형 필름으로 보호된 점착제층을 갖는 경우, 이형 필름을 박리하여 「광학 필름/점착제층」과 같이 점착제층을 표출시키고 다른 광학 필름과 첩합함으로써, 점착제층이 층간의 첩합에 사용된 「광학 필름/점착제층/광학 필름」과 같은 구성이 얻어진다.For example, in the case of having a pressure-sensitive adhesive layer protected by a release film, such as "optical film / adhesive layer / release film", the release film is peeled to expose the pressure-sensitive adhesive layer like "optical film / adhesive layer" and other optical films. By bonding, a configuration such as "optical film / adhesive layer / optical film" in which the pressure-sensitive adhesive layer was used for bonding between layers is obtained.

실시예Example

이하, 실시예를 통해 본 발명을 구체적으로 설명한다.Hereinafter, the present invention will be described in detail through examples.

＜아크릴 공중합체의 제조＞<Production of acrylic copolymer>

［실시예 1］EXAMPLE 1

교반기, 온도계, 환류 냉각기 및 질소 도입관을 구비한 반응 장치에 질소 가스를 도입하여, 반응 장치 내의 공기를 질소 가스로 치환하였다. 그 후, 반응 장치에 부틸아크릴레이트 70중량부와, 메틸아크릴레이트 30중량부와, N-메틸피롤리돈 10중량부와, 아크릴산 1.5중량부와, 6-히드록시헥실아크릴레이트 0.5중량부와 함께, 용제(초산에틸)를 60중량부 첨가하였다. 그 후, 중합 개시제로서 아조비스이소부티로니트릴 0.1중량부를 2시간에 걸쳐 적하시키고, 65℃에서 6시간 반응시켜, 중량 평균 분자량 50만의 실시예 1에 사용되는 아크릴 공중합체 용액(1)을 얻었다. 아크릴 공중합체의 일부를 채취하여, 후술하는 산가의 측정 시료로 사용하였다.Nitrogen gas was introduce | transduced into the reaction apparatus provided with the stirrer, the thermometer, the reflux cooler, and the nitrogen inlet tube, and the air in the reaction apparatus was replaced with nitrogen gas. Then, 70 parts by weight of butyl acrylate, 30 parts by weight of methyl acrylate, 10 parts by weight of N-methylpyrrolidone, 1.5 parts by weight of acrylic acid, and 0.5 parts by weight of 6-hydroxyhexyl acrylate were added to the reaction device. Together, 60 parts by weight of a solvent (ethyl acetate) was added. Thereafter, 0.1 part by weight of azobisisobutyronitrile was added dropwise over 2 hours as a polymerization initiator, and reacted at 65 ° C for 6 hours to obtain an acrylic copolymer solution (1) used in Example 1 with a weight average molecular weight of 500,000. . A part of the acrylic copolymer was collected and used as a measurement sample of the acid value described later.

［실시예 2∼6 및 비교예 1∼3］[Examples 2 to 6 and Comparative Examples 1 to 3]

모노머의 조성을 각각 표 1의 (A), (B), (C-1), (C-2)의 기재와 같이 하는 것 이외에는, 상기 실시예 1에 사용되는 아크릴 공중합체 용액(1)과 동일하게 하여, 실시예 2∼6 및 비교예 1∼3에 사용되는 아크릴 공중합체 용액을 얻었다. 또한, 특별히 측정 결과를 나타내지 않지만, 실시예 2∼6 및 비교예 1∼3의 아크릴 공중합체 용액에 포함되는 공중합체의 중량 평균 분자량은 20만∼200만의 범위 내이다.The composition of the monomer was the same as that of the acrylic copolymer solution (1) used in Example 1, except that the composition of each of Table 1 (A), (B), (C-1), and (C-2) was described. Thus, acrylic copolymer solutions used in Examples 2 to 6 and Comparative Examples 1 to 3 were obtained. Moreover, although the measurement result is not specifically shown, the weight average molecular weight of the copolymer contained in the acrylic copolymer solution of Examples 2-6 and Comparative Examples 1-3 is in the range of 200,000-2 million.

＜점착제 조성물, 점착제층 및 점착 필름의 제조＞<Manufacture of an adhesive composition, an adhesive layer, and an adhesive film>

［실시예 1］EXAMPLE 1

상기와 같이 제조한 실시예 1의 아크릴 공중합체 용액(1)에 대해서, 코로네이트 L-45(톨릴렌디이소시아네이트(TDI) 화합물의 어덕트체) 0.3중량부를 첨가하고 교반 혼합하여, 실시예 1의 점착제 조성물을 얻었다. 이 점착제 조성물을 실리콘 수지 코트된 폴리에틸렌테레프탈레이트(PET) 필름으로 이루어지는 박리 필름 위에 도포한 후, 90℃에서 건조시킴으로써 용제를 제거하였다. 그 후, 23℃, 50％RH의 분위기하에서 7일간 에이징함으로써, 점착제 조성물을 가교시켜 이루어지는 점착제층을 박리 필름의 한쪽 면 위에 갖는 실시예 1의 점착 필름을 얻었다.To the acrylic copolymer solution (1) of Example 1 prepared as described above, 0.3 parts by weight of coronate L-45 (adduct of the tolylene diisocyanate (TDI) compound) was added and stirred and mixed, An adhesive composition was obtained. The adhesive composition was applied onto a release film made of a silicone resin coated polyethylene terephthalate (PET) film, and then dried at 90 ° C to remove the solvent. After that, by aging in an atmosphere of 23 ° C., 50% RH for 7 days, an adhesive film of Example 1 having an adhesive layer formed by crosslinking the adhesive composition on one side of the release film was obtained.

［실시예 2∼6 및 비교예 1∼3］[Examples 2 to 6 and Comparative Examples 1 to 3]

첨가제의 조성을 각각 표 1의 (D)의 기재와 같이 하는 것 이외에는, 상기 실시예 1의 점착 필름과 동일하게 하여, 실시예 2∼6 및 비교예 1∼3의 점착 필름을 얻었다.The adhesive films of Examples 2 to 6 and Comparative Examples 1 to 3 were obtained in the same manner as in the adhesive films of Example 1, except that the composition of the additives was as described in Table 1 (D), respectively.

Figure 112018065185334-pat00001
Figure 112018065185334-pat00001

표 1에서는, (A)군의 합계를 100중량부로 하여 구한 (B)군 내지 (D)군까지의 첨가 비율로서, 중량부의 수치를 괄호로 둘러싸 나타낸다.In Table 1, the numerical values of the parts by weight are shown in parentheses as the addition ratio from the group (B) to the group (D) obtained by setting the total number of groups (A) to 100 parts by weight.

또한, 표 1에 사용된 각 성분의 약기호의 화합물명을 표 2에 나타낸다. 한편, 코로네이트(등록상표) L-45는 니혼 폴리우레탄 공업 주식회사의 상품명이고, D-110N은 미츠이 화학 주식회사의 상품명이다. TDI는 톨릴렌디이소시아네이트를 의미하고, XDI는 자일릴렌디이소시아네이트를 의미한다.In addition, the compound names of the abbreviations of each component used in Table 1 are shown in Table 2. On the other hand, Coronate (registered trademark) L-45 is a trade name of Nihon Polyurethane Industry Co., Ltd., and D-110N is a trade name of Mitsui Chemical Co., Ltd. TDI means tolylene diisocyanate, and XDI means xylylene diisocyanate.

Figure 112018065185334-pat00002
Figure 112018065185334-pat00002

＜시험 방법 및 평가＞<Test method and evaluation>

실시예 1∼6 및 비교예 1∼3에 있어서의 점착 필름으로부터 박리 필름(실리콘 수지 코트된 PET 필름)을 박리하여 점착제층을 표출시키고, 편광판(필름)의 한쪽 면에 점착제층을 전사하였다.The release film (silicone resin coated PET film) was peeled from the pressure-sensitive adhesive films in Examples 1 to 6 and Comparative Examples 1 to 3 to expose the pressure-sensitive adhesive layer, and the pressure-sensitive adhesive layer was transferred to one side of the polarizing plate (film).

＜점착력의 측정 방법＞<Measuring method of adhesive force>

두께 180㎛인 편광판(필름)의 한쪽 면에 점착제층을 전사하여, 시료가 되는 점착 필름(점착제층이 형성된 광학 필름)을 얻었다.An adhesive layer was transferred to one surface of a polarizing plate (film) having a thickness of 180 μm to obtain an adhesive film (an optical film on which an adhesive layer was formed) serving as a sample.

이 점착 필름을 소다 석회 유리의 아세톤으로 세정한 비주석면에, 압착 롤로 첩합하였다. 그 후, 50℃, 0.5MPa×20분간의 조건에서 오토클레이브 처리한 후, 23℃×50％RH의 분위기하에 되돌리고, 1시간 경과 후의 점착 필름의 박리 강도를 인장 시험기에 의해 측정하였다. JIS Z0237 「점착 테이프·점착 시트 시험 방법」에 준거하여 측정하고, 180°방향으로 300㎜/min의 속도로 박리했을 때의 박리 강도를 점착 필름의 점착제층의 점착력으로 하였다.This pressure-sensitive adhesive film was adhered to a non-tin surface washed with acetone of soda-lime glass with a pressing roll. Thereafter, after autoclaving under conditions of 50 ° C and 0.5 MPa x 20 minutes, the mixture was returned under an atmosphere of 23 ° C x 50% RH, and the peel strength of the adhesive film after 1 hour was measured by a tensile tester. It measured according to JIS Z0237 "Adhesive Tape-Adhesive Sheet Test Method", and the peel strength at the time of peeling at a rate of 300 mm / min in the 180 ° direction was taken as the adhesive force of the adhesive layer of the adhesive film.

＜밀착성의 시험 방법＞<Test method for adhesion>

점착력을 측정한 후의 시료인 점착 필름의 점착제층을 육안으로 확인하고, 기재층의 편광판(필름)으로부터의 탈락 상태로 밀착성을 판단하였다.The adhesive layer of the adhesive film which is a sample after measuring adhesive force was visually confirmed, and adhesiveness was judged in the state of being detached from the polarizing plate (film) of the base material layer.

○…기재층으로부터 점착제층이 전혀 탈락되어 있지 않다.○… The adhesive layer was not removed from the base layer at all.

△…기재층으로부터 점착제층이 일부 떠올라 탈락되어 있다.△… A part of the pressure-sensitive adhesive layer emerges from the base layer and is removed.

×…기재층으로부터 점착제층이 탈락되어, 피착체인 유리에 전착되어 있다.×… The pressure-sensitive adhesive layer is removed from the base layer and is electrodeposited onto the glass as an adherend.

＜내구성의 시험 방법＞<Durability test method>

점착력의 측정과 동일한 방법으로 제작한 사방 10㎝의 점착 필름을, 동일한 방법으로 소다 석회 유리의 비주석면에 첩합하여 시료를 제작하였다. 이 시료를 60℃×90％RH의 분위기하에 250시간 방치한 후, 23℃×50％RH 분위기하에 취출하고, 1시간 후에 점착 필름의 상태를 육안으로 관찰하여 내구성을 판단하였다.A sample was prepared by attaching a 10 cm square adhesive film produced in the same manner as in the measurement of adhesive force to the non-tinned surface of soda-lime glass in the same manner. This sample was left under an atmosphere of 60 ° C x 90% RH for 250 hours, then taken out under an atmosphere of 23 ° C x 50% RH, and after 1 hour, the state of the adhesive film was visually observed to determine durability.

○…점착 필름의 박리 및 발포가 전혀 없다.○… There is no peeling or foaming of the adhesive film.

△…점착 필름의 일부에 박리 및 발포가 발생되어 있다.△… Peeling and foaming are generated in a part of the adhesive film.

×…점착 필름의 전체에 박리 및 발포가 발생되어 있다.×… Peeling and foaming are generated in the entire adhesive film.

＜굴절률의 측정 방법＞<Method of measuring refractive index>

23℃의 점착제층의 굴절률을 아베식 굴절계(메이커명: ERMA, 형식: ER-2S)로 측정한다.The refractive index of the pressure-sensitive adhesive layer at 23 ° C is measured by an Abbe refractometer (maker name: ERMA, model: ER-2S).

표 3에 평가 결과를 나타낸다.Table 3 shows the evaluation results.

Figure 112018065185334-pat00003
Figure 112018065185334-pat00003

실시예 1∼6의 점착 필름은 두께 5㎛인 점착제층의 점착력이 4.0N/25㎜ 이상이고, 점착제층의 굴절률이 1.47∼1.50의 범위 내이며, 밀착성 및 내구성도 우수하였다. 즉, 실시예 1∼6의 점착 필름에서는 요구 사항 및 문제를 극복할 수 있었다.In the pressure-sensitive adhesive films of Examples 1 to 6, the pressure-sensitive adhesive layer having a thickness of 5 μm was 4.0 N / 25 mm or more, the refractive index of the pressure-sensitive adhesive layer was in the range of 1.47 to 1.50, and adhesion and durability were excellent. That is, the adhesive films of Examples 1 to 6 were able to overcome the requirements and problems.

표 4에, 실시예 1, 3의 점착제 조성물을 사용하여 동일한 방법으로 제조한, 두께 3㎛, 5㎛, 10㎛, 15㎛, 20㎛인 점착제층의 점착 필름에 대해 점착력을 측정한 결과를 나타낸다. 실시예 1, 3의 점착제 조성물을 사용한 점착제층의 점착력은, 일반적으로 알려진 바와 같이 점착제층의 두께에 대략 비례하고 있다는 것을 알 수 있다.Table 4, the results of measuring the adhesive strength for the pressure-sensitive adhesive film of the adhesive layer having a thickness of 3㎛, 5㎛, 10㎛, 15㎛, 20㎛ prepared using the pressure-sensitive adhesive composition of Examples 1 and 3 Shows. It can be seen that the adhesive strength of the pressure-sensitive adhesive layer using the pressure-sensitive adhesive compositions of Examples 1 and 3 is generally proportional to the thickness of the pressure-sensitive adhesive layer.

Figure 112018065185334-pat00004
Figure 112018065185334-pat00004

비교예 1의 점착 필름은 점착제 조성물에 질소 함유 모노머를 포함하지 않기 때문인지, 두께 5㎛인 점착제층의 점착력이 약하였다. 또한, 점착제층의 굴절률이 낮고, 밀착성 및 내구성도 떨어져 있었다.The adhesive film of Comparative Example 1 was because the adhesive composition did not contain a nitrogen-containing monomer, or the adhesive strength of the adhesive layer having a thickness of 5 μm was weak. In addition, the refractive index of the pressure-sensitive adhesive layer was low, and adhesion and durability were also poor.

비교예 2의 점착 필름은 점착제 조성물에 카르복실기를 함유하는 공중합성 비닐 모노머의 배합량이 지나치게 많기 때문인지, 두께 5㎛인 점착제층의 점착력이 약하였다. 또한, 점착제층의 굴절률이 낮고, 밀착성 및 내구성도 다소 떨어져 있었다.In the pressure-sensitive adhesive film of Comparative Example 2, the adhesive strength of the pressure-sensitive adhesive layer having a thickness of 5 μm was weak because the amount of the copolymerizable vinyl monomer containing a carboxyl group in the pressure-sensitive adhesive composition was too large. In addition, the refractive index of the pressure-sensitive adhesive layer was low, and adhesiveness and durability were also slightly off.

비교예 3의 점착 필름은 점착제 조성물에 카르복실기를 함유하는 공중합성 비닐 모노머도 히드록실기를 함유하는 공중합성 비닐 모노머도 포함하지 않기 때문인지, 두께 5㎛인 점착제층의 점착력이 약하였다. 또한, 점착제층의 굴절률이 낮고, 밀착성 및 내구성도 떨어져 있었다.The adhesive film of Comparative Example 3 was because the adhesive composition did not contain a copolymerizable vinyl monomer containing a carboxyl group or a copolymerizable vinyl monomer containing a hydroxyl group, or the adhesive strength of the adhesive layer having a thickness of 5 μm was weak. In addition, the refractive index of the pressure-sensitive adhesive layer was low, and adhesion and durability were also poor.

이와 같이, 비교예 1∼3의 점착 필름에서는 종래의 요구 사항 및 문제를 극복할 수 없었다.As described above, in the pressure-sensitive adhesive films of Comparative Examples 1 to 3, conventional requirements and problems could not be overcome.

Claims (4)

아크릴계 폴리머와 (D) 가교제를 포함하는 점착제 조성물을 가교시켜 이루어지는 점착제층으로서,
상기 아크릴계 폴리머가,
(A) 알킬기의 탄소수가 C1∼C14인 알킬(메타)아크릴레이트 모노머의 적어도 1종 이상을 합한 (메타)아크릴레이트 모노머 100중량부에 대해서,
(B) 수산기 및 카르복실기를 함유하지 않는 질소 함유 비닐 모노머의 1종 이상을 5∼50중량부와,
(C) 카르복실기를 함유하는 공중합성 비닐 모노머의 1종 이상을 0.1∼2.0중량부 및/또는 히드록실기를 함유하는 공중합성 비닐 모노머의 적어도 1종 이상을 0.1∼5중량부 공중합시킨 중량 평균 분자량 20만∼200만의 공중합체이고,
상기 점착제 조성물이, 상기 (A) 알킬기의 탄소수가 C1∼C14인 알킬(메타)아크릴레이트 모노머의 적어도 1종 이상을 합한 (메타)아크릴레이트 모노머 100중량부에 대해서, 상기 (D) 가교제를 0.01∼5중량부의 비율로 함유하여 이루어지며,
상기 카르복실기를 함유하는 공중합성 비닐 모노머가, (메타)아크릴산, 카르복시에틸(메타)아크릴레이트, 카르복시펜틸(메타)아크릴레이트, 2-(메타)아크릴로일옥시에틸헥사히드로프탈산, 2-(메타)아크릴로일옥시프로필헥사히드로프탈산, 2-(메타)아크릴로일옥시에틸프탈산, 2-(메타)아크릴로일옥시에틸숙신산, 2-(메타)아크릴로일옥시에틸말레산, 카르복시폴리카프로락톤모노(메타)아크릴레이트, 2-(메타)아크릴로일옥시에틸테트라히드로프탈산으로 이루어지는 화합물군에서 선택된 화합물이고,
상기 점착제 조성물이 실란 커플링제를 함유하지 않고,
상기 점착제층의 두께가 1㎛∼20㎛이며, 두께가 5㎛일 때의 점착력이 4.0(N/25㎜) 이상이고,
피착체에 상기 점착제층이 형성된 점착 필름을 첩합하기 전에 에이징 처리가 이미 실시되어, 피착체에 상기 점착제층이 형성된 점착 필름을 첩합한 후에는 에이징 처리를 실시할 필요가 없으며, 상기 점착 필름이 이형 필름/점착제층/이형 필름의 구성을 갖고,
광학 부재의 층간 첩합에 사용되는 것을 특징으로 하는 점착제층.As an adhesive layer formed by crosslinking the pressure-sensitive adhesive composition comprising an acrylic polymer and (D) crosslinking agent,
The acrylic polymer,
(A) 100 parts by weight of a (meth) acrylate monomer in which at least one kind of alkyl (meth) acrylate monomer having C1 to C14 carbon atoms in the alkyl group is added,
(B) 5 to 50 parts by weight of at least one of a nitrogen-containing vinyl monomer containing no hydroxyl group or carboxyl group,
(C) 0.1 to 2.0 parts by weight of one or more of the copolymerizable vinyl monomer containing a carboxyl group and / or 0.1 to 5 parts by weight of at least one copolymerizable vinyl monomer containing a hydroxyl group 200,000 to 2,000,000 copolymers,
The pressure-sensitive adhesive composition, 0.01 parts by weight of the (meth) acrylate monomer combined with at least one or more of the alkyl (meth) acrylate monomer having a carbon number of C1 to C14 of the (A) alkyl group, the (D) crosslinking agent 0.01 ∼5 parts by weight,
The copolymerizable vinyl monomer containing the carboxyl group is (meth) acrylic acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, 2- (meth) acryloyloxyethylhexahydrophthalic acid, 2- (meth ) Acryloyloxypropylhexahydrophthalic acid, 2- (meth) acryloyloxyethylphthalic acid, 2- (meth) acryloyloxyethylsuccinic acid, 2- (meth) acryloyloxyethylmaleic acid, carboxypolycapro A compound selected from the group consisting of lactone mono (meth) acrylate and 2- (meth) acryloyloxyethyltetrahydrophthalic acid,
The pressure-sensitive adhesive composition does not contain a silane coupling agent,
The adhesive layer has a thickness of 1 µm to 20 µm, and an adhesive force when the thickness is 5 µm is 4.0 (N / 25 mm) or more,
The aging treatment has already been performed before bonding the pressure-sensitive adhesive film on which the pressure-sensitive adhesive layer is formed on the adherend, and after the pressure-sensitive adhesive film on which the pressure-sensitive adhesive layer is formed is adhered to the adherend, there is no need to perform an aging treatment, and the pressure-sensitive adhesive film is released It has the composition of a film / adhesive layer / release film,
A pressure-sensitive adhesive layer used for interlayer bonding of optical members. 제 1 항의 점착제층이 이형 필름의 한쪽 면에 형성되어 이루어지고, 이형 필름/점착제층/이형 필름의 구성인 점착 필름.The pressure-sensitive adhesive film of claim 1, wherein the pressure-sensitive adhesive layer is formed on one side of a release film, and is composed of a release film / adhesive layer / release film. 기재의 한쪽 면 위에 제 1 항의 점착제층이 적층되어 이루어지는 점착 필름.An adhesive film obtained by laminating the adhesive layer of claim 1 on one side of a substrate. 광학 필름의 적어도 일방의 면에 제 1 항의 점착제층이 적층되어 이루어지는 점착제층이 형성된 광학 필름.An optical film with an adhesive layer formed by laminating the adhesive layer of claim 1 on at least one side of an optical film.
KR1020180076826A 2012-12-17 2018-07-03 Adhesive layer and adhesive film KR102088171B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020190148179A KR102270910B1 (en) 2012-12-17 2019-11-19 Adhesive layer and adhesive film

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012274796A JP6013898B2 (en) 2012-12-17 2012-12-17 Adhesive layer and adhesive film
JPJP-P-2012-274796 2012-12-17

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
KR1020170151985A Division KR101908291B1 (en) 2012-12-17 2017-11-15 Adhesive layer and adhesive film

Related Child Applications (1)

Application Number Title Priority Date Filing Date
KR1020190148179A Division KR102270910B1 (en) 2012-12-17 2019-11-19 Adhesive layer and adhesive film

Publications (2)

Publication Number Publication Date
KR20180079280A KR20180079280A (en) 2018-07-10
KR102088171B1 true KR102088171B1 (en) 2020-03-12

Family

ID=50904477

Family Applications (6)

Application Number Title Priority Date Filing Date
KR1020130139689A KR101622945B1 (en) 2012-12-17 2013-11-18 Adhesive layer and adhesive film
KR1020150120906A KR101701891B1 (en) 2012-12-17 2015-08-27 Adhesive layer and adhesive film
KR1020170011789A KR101799801B1 (en) 2012-12-17 2017-01-25 Adhesive layer and adhesive film
KR1020170151985A KR101908291B1 (en) 2012-12-17 2017-11-15 Adhesive layer and adhesive film
KR1020180076826A KR102088171B1 (en) 2012-12-17 2018-07-03 Adhesive layer and adhesive film
KR1020190148179A KR102270910B1 (en) 2012-12-17 2019-11-19 Adhesive layer and adhesive film

Family Applications Before (4)

Application Number Title Priority Date Filing Date
KR1020130139689A KR101622945B1 (en) 2012-12-17 2013-11-18 Adhesive layer and adhesive film
KR1020150120906A KR101701891B1 (en) 2012-12-17 2015-08-27 Adhesive layer and adhesive film
KR1020170011789A KR101799801B1 (en) 2012-12-17 2017-01-25 Adhesive layer and adhesive film
KR1020170151985A KR101908291B1 (en) 2012-12-17 2017-11-15 Adhesive layer and adhesive film

Family Applications After (1)

Application Number Title Priority Date Filing Date
KR1020190148179A KR102270910B1 (en) 2012-12-17 2019-11-19 Adhesive layer and adhesive film

Country Status (4)

Country Link
JP (1) JP6013898B2 (en)
KR (6) KR101622945B1 (en)
CN (1) CN103865445B (en)
TW (2) TWI568814B (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6057693B2 (en) * 2012-12-17 2017-01-11 藤森工業株式会社 Adhesive layer and adhesive film
CN109439238A (en) * 2014-03-31 2019-03-08 日东电工株式会社 Pressure-sensitive adhesive for optical films composition, pressure-sensitive adhesive for optical films layer, optical film and image display device with adhesive phase
JP6644971B2 (en) * 2014-08-06 2020-02-12 藤森工業株式会社 Adhesive layer and adhesive film
JP6620325B2 (en) * 2014-08-06 2019-12-18 藤森工業株式会社 Adhesive layer and adhesive film
JP6511659B2 (en) * 2015-06-08 2019-05-15 藤森工業株式会社 Pressure-sensitive adhesive layer for optical film, and pressure-sensitive adhesive film for optical film
JP6544689B2 (en) * 2015-11-25 2019-07-17 株式会社ケーイーアール Operation grip and moving body
CN107987214B (en) * 2016-10-26 2020-11-27 宁波激智科技股份有限公司 Diffusion particles suitable for aqueous adhesive system and preparation method thereof
JP7153459B2 (en) * 2018-03-28 2022-10-14 日東電工株式会社 Adhesive layer, piece protective polarizing film with adhesive layer, image display device and continuous production method thereof
JP6688822B2 (en) * 2017-03-29 2020-04-28 日東電工株式会社 One-sided protective polarizing film with adhesive layer, image display device and continuous production method thereof
JP6730348B2 (en) * 2017-03-29 2020-07-29 日東電工株式会社 One-sided protective polarizing film with adhesive layer, image display device and continuous production method thereof
JP6859248B2 (en) * 2017-10-26 2021-04-14 日本カーバイド工業株式会社 Adhesive film and adhesive sheet
CN112955517B (en) * 2018-11-06 2022-09-02 Dic株式会社 Adhesive composition, adhesive layer, sheet and tape
JP6644129B2 (en) * 2018-12-27 2020-02-12 藤森工業株式会社 Adhesive layer and adhesive film
JP6775042B2 (en) * 2019-01-23 2020-10-28 藤森工業株式会社 An adhesive layer for an optical film, an adhesive film for an optical film, and an adhesive composition for an optical film for producing them.
JP6777771B2 (en) * 2019-01-23 2020-10-28 藤森工業株式会社 Adhesive layer for optical film and adhesive film for optical film
JP6775616B2 (en) * 2019-01-23 2020-10-28 藤森工業株式会社 An adhesive layer for an optical film, an adhesive film for an optical film, and an adhesive composition for an optical film for producing them.
JP7092823B2 (en) * 2020-04-07 2022-06-28 藤森工業株式会社 Adhesive layer and adhesive film

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006301572A (en) 2004-11-30 2006-11-02 Fuji Photo Film Co Ltd Polarizing plate and liquid crystal display device using same

Family Cites Families (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006293281A (en) 2005-03-17 2006-10-26 Seiko Epson Corp Optical component and projector
JP4800722B2 (en) 2005-09-26 2011-10-26 日東電工株式会社 Optical pressure-sensitive adhesive composition, optical pressure-sensitive adhesive layer, optical member with a pressure-sensitive adhesive layer, method for producing the same, and image display device
JP2007297452A (en) * 2006-04-28 2007-11-15 Daio Paper Corp Adhesive sheet
JP2009091522A (en) 2007-10-12 2009-04-30 Toyo Ink Mfg Co Ltd Adhesive composition and laminate obtained by using the same
JP5340649B2 (en) * 2007-10-22 2013-11-13 日東電工株式会社 Optical film pressure-sensitive adhesive composition, optical film pressure-sensitive adhesive layer, production method thereof, pressure-sensitive adhesive optical film, and image display device
JP5871297B2 (en) * 2007-11-02 2016-03-01 日東電工株式会社 Adhesive optical film, method for producing the same, and image display device
EP2072552A3 (en) * 2007-12-20 2009-07-29 Nitto Denko Corporation Pressure-sensitive adhesive composition for optical films, pressure-sensitive adhesive optical film and image display
JP5379409B2 (en) * 2008-02-15 2013-12-25 日東電工株式会社 Adhesive composition for optical film, adhesive optical film, and image display device
KR20100029512A (en) * 2008-09-08 2010-03-17 주식회사 엘지화학 Pressure-sensitive adhesive compositions and pressure-sensitive adhesive films comprising the same
KR101455302B1 (en) * 2008-09-24 2014-10-27 동우 화인켐 주식회사 Adhesive composition and polarizing plate using the same
JP5243197B2 (en) * 2008-11-18 2013-07-24 日東電工株式会社 Optical member pressure-sensitive adhesive composition, optical member pressure-sensitive adhesive layer, pressure-sensitive adhesive optical member, and image display device
JP2010155974A (en) * 2008-12-01 2010-07-15 Nitto Denko Corp Acrylic pressure sensitive adhesive sheet, method of manufacturing the same, and laminated constitution
KR101098401B1 (en) * 2009-02-27 2011-12-26 고려대학교 산학협력단 fabricating method of Field Effect Transistor using Ⅲ-Ⅴ compound semiconductor
JP2010285548A (en) * 2009-06-11 2010-12-24 Nitto Denko Corp Adhesive tape for optical member
TWI486417B (en) * 2009-11-17 2015-06-01 Soken Kagaku Kk A polarizing plate adhesive composition, and a polarizing plate obtained by using the polarizing plate
CN102181244B (en) * 2009-12-29 2014-02-12 第一毛织株式会社 Adhesive binder and preparation method thereof, composition, method for manufacturing adhesive binder layer and optical member
JP5524640B2 (en) 2010-01-26 2014-06-18 大王製紙株式会社 Adhesive sheet
US20120328873A1 (en) * 2010-03-10 2012-12-27 Nitto Denko Corporation Optical pressure-sensitive adhesive sheet
JP5540847B2 (en) * 2010-04-08 2014-07-02 藤倉化成株式会社 Acrylic adhesive composition and adhesive film
JP5800469B2 (en) * 2010-05-27 2015-10-28 綜研化学株式会社 Adhesive composition for optical member and adhesive sheet
JP2012021148A (en) * 2010-06-16 2012-02-02 Nippon Synthetic Chem Ind Co Ltd:The Pressure-sensitive adhesive, pressure-sensitive adhesive for optical member, optical member with pressure-sensitive adhesive layer and image display device
WO2012050049A1 (en) * 2010-10-12 2012-04-19 日本合成化学工業株式会社 Adhesive composition for optical components, adhesive for optical components, optical component with adhesive layer, and image display device
JP2012135951A (en) * 2010-12-27 2012-07-19 Mitsubishi Plastics Inc Polyester film for double-sided adhesive tape
KR101385033B1 (en) * 2010-12-31 2014-04-14 제일모직주식회사 Acrylic Adhesive Composition
JP5583048B2 (en) 2011-02-14 2014-09-03 リンテック株式会社 Optical pressure-sensitive adhesive composition, optical pressure-sensitive adhesive layer, and optical pressure-sensitive adhesive laminate
JP5758647B2 (en) * 2011-02-17 2015-08-05 日東電工株式会社 Optical adhesive sheet
JP5614328B2 (en) 2011-02-25 2014-10-29 藤倉化成株式会社 Adhesive composition, adhesive film, and optical component
JP5842439B2 (en) * 2011-03-10 2016-01-13 住友化学株式会社 Optical film with adhesive and optical laminate using the same
JP5760571B2 (en) 2011-03-24 2015-08-12 Dic株式会社 Colored adhesive tape for fixing polarizing film
JP5683369B2 (en) * 2011-04-22 2015-03-11 藤森工業株式会社 Adhesive composition and surface protective film
JP5887066B2 (en) * 2011-05-17 2016-03-16 綜研化学株式会社 Adhesive composition for optical member and processed product thereof
JP5821309B2 (en) 2011-06-14 2015-11-24 住友化学株式会社 Light diffusing adhesive sheet, polarizing plate and liquid crystal display panel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006301572A (en) 2004-11-30 2006-11-02 Fuji Photo Film Co Ltd Polarizing plate and liquid crystal display device using same

Also Published As

Publication number Publication date
KR20170129655A (en) 2017-11-27
CN103865445B (en) 2016-08-24
KR101622945B1 (en) 2016-05-20
KR20140078537A (en) 2014-06-25
KR20170015411A (en) 2017-02-08
KR20150105276A (en) 2015-09-16
TW201538659A (en) 2015-10-16
TWI496860B (en) 2015-08-21
TWI568814B (en) 2017-02-01
KR102270910B1 (en) 2021-06-29
KR20180079280A (en) 2018-07-10
JP6013898B2 (en) 2016-10-25
KR101701891B1 (en) 2017-02-02
KR101799801B1 (en) 2017-11-21
JP2014118485A (en) 2014-06-30
KR20190131007A (en) 2019-11-25
TW201428075A (en) 2014-07-16
CN103865445A (en) 2014-06-18
KR101908291B1 (en) 2018-10-16

Similar Documents

Publication Publication Date Title
KR102088171B1 (en) Adhesive layer and adhesive film
JP6026260B2 (en) Adhesive layer and adhesive film
JP6057693B2 (en) Adhesive layer and adhesive film
JP7193588B2 (en) Adhesive layer and adhesive film
JP6644128B2 (en) Adhesive layer and adhesive film
JP6717884B2 (en) Adhesive layer and adhesive film
JP6744289B2 (en) Adhesive layer and adhesive film
JP6507394B2 (en) Adhesive layer and adhesive film
JP6207109B2 (en) Adhesive layer and adhesive film
JP6270972B2 (en) Adhesive layer and adhesive film
JP6367885B2 (en) Adhesive layer and adhesive film
JP7348350B2 (en) adhesive film
JP7144501B2 (en) Adhesive layer and adhesive film
JP6810185B2 (en) Adhesive layer and adhesive film
JP7092823B2 (en) Adhesive layer and adhesive film
JP6508685B2 (en) Adhesive layer and adhesive film

Legal Events

Date Code Title Description
A107 Divisional application of patent
A201 Request for examination
E902 Notification of reason for refusal
AMND Amendment
E90F Notification of reason for final refusal
AMND Amendment
E601 Decision to refuse application
X091 Application refused [patent]
A107 Divisional application of patent
AMND Amendment
X701 Decision to grant (after re-examination)