Optical adhesive, optical adhesive tape, and layered body

A technology of adhesive layer and adhesive, applied in the direction of adhesive type, ester copolymer adhesive, film/sheet adhesive, etc., which can solve the problems of transparent electrode degradation and so on

Inactive Publication Date: 2016-06-15
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the adhesive tape described in Patent Document 1 is used for an electronic component, there is a problem that the transparent electrode made of tin-doped indium oxide (ITO) or the like may be deteriorated.

Method used

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  • Optical adhesive, optical adhesive tape, and layered body
  • Optical adhesive, optical adhesive tape, and layered body
  • Optical adhesive, optical adhesive tape, and layered body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3、 comparative example 1～3

[0091] (1) Synthesis of Living Radical Polymerization (LRP)

[0092] 6.38 g (50 mmol) of Tellurium (40 mesh, metal tellurium, manufactured by Aldrich) was suspended in 50 mL of tetrahydrofuran (THF), and 1.6 mol / L of n-butyllithium / hexane was slowly dropped thereinto at room temperature. 34.4 mL (55 mmol) of alkane solution (manufactured by Aldrich). The reaction solution was stirred until the tellurium metal disappeared completely. To this reaction solution was added 10.7 g (55 mmol) of ethyl 2-bromo-isobutyrate at room temperature, followed by stirring for 2 hours. After the reaction, the solvent was concentrated under reduced pressure, followed by distillation under reduced pressure to obtain ethyl 2-methyl-2-n-butylhydrotelluryl-propionate as a yellow oil.

[0093] In a glove box replaced with argon, 38 μL of 2-methyl-2-n-butylhydrotelluryl-propionic acid ethyl ester, V-60 (2,2'- After 2.8 mg of azodiisobutyronitrile (manufactured by Wako Pure Chemical Industries, Ltd.)...

Embodiment 4

[0098] After preparing a solution containing a living radical polymerization polymer (LRP) in the same manner as in Example 1, 1.5 parts by weight of MITECNY260A (manufactured by Mitsubishi Gas Chemical Co., Ltd.) was added as a crosslinking agent with respect to 100 parts by weight of the copolymer solid content, After stirring, apply on the release-treated surface of a release polyethylene terephthalate (PET) film, and dry at 110°C for 10 minutes to remove ethyl acetate and form an adhesive layer with a thickness of 50 μm . In addition, the release film for protecting an adhesive layer was laminated|stacked on the surface of both sides of an adhesive layer.

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Abstract

The present invention provides an optical adhesive which does not become clouded even when exposed to high temperature and humidity, which also has excellent antifoaming properties or workability, and which does not degrade a transparent electrode such as one comprising ITO. Another purpose of the present invention is to provide an optical adhesive tape and a layered body manufactured using the optical adhesive. The present invention is an optical adhesive containing: a (meth)acrylic polymer having a molecular weight distribution (Mw / Mn) of 1.05-2.5 obtained by copolymerization by living radical polymerization of a monomer mixture including a) 60-95 parts by weight of alkyl (meth)acrylate having a C1-14 alkyl group, b) 0.1-1 part by weight of a monomer containing a carboxyl group, and c) 10-30 parts by weight of a monomer containing a hydroxyl group, an amino group, or an amide group; and a crosslinking agent; the alkyl (meth)acrylate a) having a C1-14 alkyl group including (meth)acrylate having a bicyclo ring structure.

Description

technical field [0001] The present invention relates to an adhesive for optics that does not fog even after being exposed to high temperature and high humidity, is excellent in foaming resistance and processability, and does not deteriorate transparent electrodes made of ITO or the like. In addition, the present invention relates to an optical pressure-sensitive adhesive tape and a laminate produced using the optical pressure-sensitive adhesive. Background technique [0002] Adhesives used for optical applications are used, for example, when bonding displays, touch panels, and the like to the case of a module in a portable information terminal. Since the display screen is required to be clear, an adhesive that does not fog up even after being exposed to high temperature and high humidity is desired. [0003] In addition, when exposed to high temperature and high humidity in optical applications, outgassing may occur from the adherend, and air bubbles may be generated on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/06B32B27/00B32B27/30C09J7/00
CPCC09J133/06B32B7/12B32B2307/412B32B2405/00B32B2457/20B32B2457/208C09J7/385
Inventor 石川由贵石堂泰志福冈正辉
Owner SEKISUI CHEM CO LTD
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