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Adhesive composition for optical component and binding film for optical component therewith

A technology for optical components and adhesives, applied in adhesive types, ester copolymer adhesives, film/sheet adhesives, etc., can solve problems such as slow crosslinking reactions

Inactive Publication Date: 2006-11-29
SOKEN CHEM & ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cross-linking reaction of this adhesive composition after being applied to the support is slow, and it takes a long time to achieve stable adhesive performance. Therefore, it cannot meet market requirements in terms of improving productivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0027] Acrylic polymer solution A

[0028]Put 100 parts by weight of n-butyl acrylate, 4 parts by weight of 2-hydroxyethyl acrylate, 0.5 parts by weight of acrylic acid, 90 parts by weight of ethyl acetate and 0.1 parts by weight of benzoyl peroxide into the reactor, and replace the air in the reactor. Then, it heated up to 70 degreeC, stirring, and it reacted for 8 hours, and the acrylic polymer solution A was obtained. The obtained acrylic polymer A had a Mw of 1.2 million as measured by GPC.

manufacture example 2

[0029] Acrylic polymer solution B

[0030] Put 100 parts by weight of n-butyl acrylate, 2 parts by weight of 2-hydroxyethyl acrylate, 1 part by weight of acrylamide, 100 parts by weight of ethyl acetate and 0.2 parts by weight of azobisisobutyronitrile into the reactor, and use nitrogen gas to The air in the reactor was replaced. Then, the temperature was raised to 60°C while stirring, and the reaction was carried out for 4 hours. After 4 hours, 100 parts by weight of toluene, 5 parts by weight of α-methylstyrene dimer, and 2 parts by weight of azobisisobutyronitrile were added, and the temperature was raised. The temperature was increased to 90° C., and the reaction was further carried out for 4 hours to obtain an acrylic polymer solution B. The obtained acrylic polymer B had a Mw of 700,000 as measured by GPC.

manufacture example 3

[0031] Acrylic polymer solution C

[0032] Put 100 parts by weight of 2-ethylhexyl acrylate, 0.5 parts by weight of 4-hydroxybutyl acrylate, 2.5 parts by weight of acrylamide, 90 parts by weight of ethyl acetate and 0.07 parts by weight of benzoyl peroxide into the reactor , replace the air in the reactor with nitrogen. Then, it heated up to 73 degreeC, stirring, and it reacted for 8 hours, and the acrylic polymer solution C was obtained. The obtained acrylic polymer C had a Mw of 1.4 million as measured by GPC.

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PUM

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Abstract

The pressure-sensitive adhesive composition comprises 100 pts. wt. of an acrylic polymer which is a copolymer of a monomer mixture containing (a) 100 pts. wt. of an alkyl (meth)acrylate, (b) 0.1-10 pts. wt. of a monomer having a hydroxy group in the molecule, (c) 0.05-3 pts. wt. of a monomer having any functional group of a carboxy group, an amide group and an amino group in the molecule and having >=500,000 and <=2,000,000 weight-average molecular weight according to gel permeation chromatography (GPC) and 0.01-5 pts. wt. of a polyol-modified xylylene diisocyanate cross-linking agent. The optical pressure-sensitive adhesive sheet is obtained by forming a pressure-sensitive adhesive layer composed of the pressure-sensitive adhesive composition for the optical member on one or both surfaces of a support.

Description

technical field [0001] The present invention relates to an adhesive composition for optical parts requiring transparency and an adhesive film for optical parts using the adhesive composition. More specifically, it relates to an adhesive composition containing a specific acrylic copolymer and a specific isocyanate curing agent. An adhesive for an optical member, and an adhesive film for an optical member in which an adhesive layer using the adhesive composition is provided on one or both surfaces of a support. Background technique [0002] Flat panel displays (FDPs) such as liquid crystal displays (LCDs) and plasma display panels (PDPs) are used as display devices in various fields. These display devices use an anti-reflection film that prevents reflection from external light sources, a protective film that prevents the display device from being scratched, and the like. [0003] In addition, cathode ray tubes (CRTs) and FPDs are used not only as display devices, but also as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/06C09J7/02C08F220/12C09J133/08C09J157/06C09J157/10C09J175/04
CPCC09J7/20C09J133/04C09J133/062C09J133/26
Inventor 野村明仁科贞彦富田幸二
Owner SOKEN CHEM & ENG CO LTD