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.:
Date of Patent:
Jul. 28, 1998
Filed:
Dec. 20, 1996
Toshihiko Higuchi, Yokohama, JP;
Satoshi Kondo, Yokohama, JP;
Hiroyuki Watanabe, Chita-gun, JP;
Jean-Louis Bravet, Thourotte, FR;
Noel Crux, Compiegne, FR;
Asahi Glass Company Ltd., Tokyo, JP;
Saint Gobain Vitrage, Courbevoie, FR;
Abstract
A transparent, smooth and cross-linked polyurethane resin sheet prepared from a reaction-curable composition which comprises a high molecular weight polyol mixture (A) comprising a polyester polyol and/or a polycarbonate polyol, as its main components, and containing a diol and a trivalent or higher valent polyol, the average hydroxyl value of the mixture being from 40 to 120, and the equivalent ratio of (the trivalent or higher valent polyol)/(the diol) being from 0.1 to 0.8, a substantially bivalent chain extender (B) in an amount of from 1.9 to 6.0 equivalents per equivalent of the polyol mixture (A), and a substantially bivalent alicyclic or aliphatic polyisocyanate compound (C) in an amount of from 0.8 to 1.2 equivalents per equivalent of the sum of the polyol mixture (A) and the chain extender (B), as its main components.