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Title:
OPTICALLY CLEAR ADHESIVE SHEET, METHOD FOR MANUFACTURING OPTICALLY CLEAR ADHESIVE SHEET, LAMINATE, AND BONDED STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2018/142769
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an optically clear adhesive sheet which has excellent flexibility and uses a thermosetting polyurethane capable of being made into a thick film to inhibit whitening and delay bubbles caused by being stored in a high-humidity environment. Provided is an optically clear adhesive sheet comprising a thermosetting polyurethane, wherein the thermosetting polyurethane is a cured product of a thermosetting polyurethane composition containing a polyol component and a polyisocyanate component, the polyisocyanate component comprises both a polyisocyanate having a hydrophilic unit and a polyisocyanate not having a hydrophilic unit, and the adhesive sheet has a moisture absorption of 3600 ppm or less when a test is carried out in which the adhesive sheet is placed in a high-temperature and high-humidity environment of 85°C and 85% humidity for three hours.

Inventors:
TAKAGI, Daisuke (6-6, Minatojima Minamimachi 4-chome, Chuo-ku, Kobe-sh, Hyogo 47, 〒6500047, JP)
NAITO, Hiroki (6-6, Minatojima Minamimachi 4-chome, Chuo-ku, Kobe-sh, Hyogo 47, 〒6500047, JP)
HOSOKAWA, Yuki (6-6, Minatojima Minamimachi 4-chome, Chuo-ku, Kobe-sh, Hyogo 47, 〒6500047, JP)
Application Number:
JP2017/044362
Publication Date:
August 09, 2018
Filing Date:
December 11, 2017
Export Citation:
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Assignee:
BANDO CHEMICAL INDUSTRIES, LTD. (6-6 Minatojima Minamimachi 4-chome, Chuo-ku Kobe-sh, Hyogo 47, 〒6500047, JP)
International Classes:
C09J7/00; C08G18/72; C09J175/04
Attorney, Agent or Firm:
YASUTOMI & ASSOCIATES (5-36, Miyahara 3-chome Yodogawa-ku, Osaka-sh, Osaka 03, 〒5320003, JP)
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