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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11530337 B1

PDFFull Text
Date of Patent:
Dec. 20, 2022

Filed:

Sep. 26, 2016

Optically transparent pressure-sensitive adhesive sheet, laminate, process for producing laminate, and display device with touch panel

Applicant:

Bando Chemical Industries, Ltd., Hyogo, JP;

Inventors:

Yuki Hosokawa, Hyogo, JP;

Jun Onishi, Hyogo, JP;

Soichiro Nakane, Hyogo, JP;

Assignee:

BANDO CHEMICAL INDUSTRIES, LTD., Hyogo, JP;

Attorney:

JCIPRNET

Primary Examiner:

Anish P Desai

Int. Cl.
CPC ...
C08G 71/00 (2006.01); C09J 7/10 (2018.01); C09J 175/04 (2006.01); C08G 18/80 (2006.01); C08G 18/48 (2006.01); C08G 18/62 (2006.01); B32B 27/40 (2006.01); B32B 27/00 (2006.01); C08G 18/75 (2006.01); C09J 7/35 (2018.01); C08G 18/24 (2006.01); C08G 18/44 (2006.01); C08G 18/73 (2006.01); G06F 3/041 (2006.01);
U.S. Cl.
CPC ...
C09J 7/10 (2018.01); B32B 27/00 (2013.01); B32B 27/40 (2013.01); C08G 18/246 (2013.01); C08G 18/44 (2013.01); C08G 18/48 (2013.01); C08G 18/4825 (2013.01); C08G 18/4833 (2013.01); C08G 18/6204 (2013.01); C08G 18/6208 (2013.01); C08G 18/73 (2013.01); C08G 18/755 (2013.01); C08G 18/8016 (2013.01); C09J 7/35 (2018.01); C09J 175/04 (2013.01); G06F 3/041 (2013.01); C08G 2170/20 (2013.01); C08G 2170/40 (2013.01); C09J 2203/318 (2013.01); C09J 2475/00 (2013.01); Y10T 428/2896 (2015.01);
Abstract

The present invention provides an optically clear adhesive sheet using a heat-curable polyurethane composition, wherein the optically clear adhesive sheet can, when bonded to an adherend such as a glass plate, prevent the occurrence of air bubbles even at high temperature and normal humidity and maintain a stable bonded interface. The optically clear adhesive sheet of the present invention is an optically clear adhesive sheet containing: a cured product of a heat-curable polyurethane composition, the heat-curable polyurethane composition containing a polyol component and a polyisocyanate component, the polyol component having an olefin skeleton, the polyisocyanate component containing an acyclic aliphatic polyisocyanate and/or an alicyclic polyisocyanate.

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