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Adhesive composition, optical functional component and liquid crystal display device therewith

A technology of optical functions and adhesives, applied in nonlinear optics, optics, adhesives, etc., can solve problems such as contamination of liquid crystal display components

Active Publication Date: 2007-07-11
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, with these adhesives containing a plasticizer and liquid paraffin, there are problems such as that the plasticizer and liquid paraffin are precipitated, or that the plasticizer or liquid paraffin precipitated when the polarizing plate is peeled off may contaminate a liquid crystal display element, etc. adherend

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 100 parts by weight of an acrylate copolymer having a weight-average molecular weight of 1.7 million consisting of 99% by weight of butyl acrylate units and 1% by weight of 4-hydroxybutyl acrylate units, polyurethane elastic with a weight-average molecular weight of 100,000 and a 100% modulus of 2 MPa 10 parts by weight of a solid (manufactured by Toyo Inki Manufacturing Co., Ltd., trade name: HP-H) and 0.2 parts by weight of a crosslinking agent (manufactured by Soken Chemical Co., Ltd., trade name: TD-75) composed of polyisocyanate compounds were dissolved in methyl ethyl alcohol. base ketone to obtain an adhesive solution with a solid content of 30% by weight.

[0054] This adhesive solution was applied to a polyethylene terephthalate release sheet (manufactured by Lintec Corporation, trade name: SP-PET3811) that had undergone a silicone-based release treatment on one side with a knife coater. ) was dried at 90° C. for 1 minute to form an adhesive layer with a thickn...

Embodiment 2

[0057] Except that the compounding amount of the polyurethane elastomer in the adhesive solution was changed from 10 parts by weight to 1 part by weight (the solid content of the adhesive solution was 30% by weight), it was carried out in the same manner as in Example 1, and obtained Adhesive layer for polarizers.

Embodiment 3

[0059] Except that the compounding amount of the polyurethane elastomer in the adhesive solution was changed from 10 parts by weight to 0.05 parts by weight (the solid content of the adhesive solution was 30% by weight), it was carried out in the same manner as in Example 1, and obtained Adhesive layer for polarizers.

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PUM

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Abstract

The present invention provide an adhesive composition excellent in adhesion to an adherend and adhesion durability and compliance with the extension / contraction of the adherend. The adhesive composition comprises an acrylic adhesive and 0.005-20 pt(s). wt. of a urethane elastomer based on 100 pts. wt. of the acrylic adhesive.

Description

technical field [0001] The present invention relates to an adhesive composition, an adhesive optical functional member using the same, and a liquid crystal display element. [0002] More specifically, the present invention relates to an adhesive composition that is excellent in adhesiveness and adhesion durability to an adherend even under high-temperature and high-humidity conditions, and at the same time has correspondence to expansion and contraction of the adherend, and An adhesive optical functional member in which the adhesive composition layer is provided on a polarizing plate or the like, and a liquid crystal display element in which an optical functional member such as a polarizing plate is provided on both surfaces of a liquid crystal cell with the adhesive composition layer. Background technique [0003] In the past, articles bonded between adherends through an adhesive layer had a problem that the adherends sometimes peeled off at the ends due to insufficient adh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/06G02F1/13G02B5/30C09J133/00C09J133/08C09J175/04G02F1/1335
CPCA47C27/00A47C31/123
Inventor 荒井隆行樫尾干广
Owner LINTEC CORP