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
CN105683324AInactive Publication Date: 2016-06-15SEKISUI CHEM CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SEKISUI CHEM CO LTD
Publication Date
2016-06-15
Estimated Expiration
Not applicable · inactive patent

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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.
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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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