Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
OPTICALLY CLEAR ADHESIVE SHEET, METHOD FOR MANUFACTURING OPTICALLY CLEAR ADHESIVE SHEET, LAMINATE, AND BONDED STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2018/179608
Kind Code:
A1
Abstract:
The present invention uses a thermosetting polyurethane that has excellent flexibility and can be made into a thick film to provide an optically clear adhesive sheet which has excellent creep properties under high temperature environments and in which whitening that occurs due to storage under high temperature and high humidity environments is suppressed. This optically clear adhesive sheet comprises a thermosetting polyurethane, wherein the thermosetting polyurethane is a cured product of a thermosetting polyurethane composition comprising a polyol component and a polyisocyanate component, the polyisocyanate component containing a first polyisocyanate having a hydrophilic unit and a second polyisocyanate that does not have a hydrophilic unit. The optically clear adhesive sheet has a shear storage modulus at 85°C of 5×103 to 5×104 Pa and an adhesive strength measured by a 180° peel test of 1.5 to 30 N/25 mm.

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)
Application Number:
JP2017/044363
Publication Date:
October 04, 2018
Filing Date:
December 11, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
BANDO CHEMICAL INDUSTRIES, LTD. (6-6 Minatojima Minamimachi 4-chome, Chuo-ku Kobe-sh, Hyogo 47, 〒6500047, JP)
International Classes:
C09J7/00; B32B27/00; B32B27/40; C08G18/72; C09J175/04
Attorney, Agent or Firm:
YASUTOMI & ASSOCIATES (5-36, Miyahara 3-chome Yodogawa-ku, Osaka-sh, Osaka 03, 〒5320003, JP)
Download PDF: