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:
Aug. 13, 1991
Filed:
Mar. 20, 1990
Jean-Louis Bravet, Thourotte, FR;
Sylvie Drujon, Thourotte, FR;
Saint-Gobain Recherche, Aubervilliers, FR;
Abstract
A polyurethane-based sheet of high optical quality having energy-absorbing properties, obtained by the reactive pouring or spraying, on a flat, horizontal base, of a reactive mixture of an isocyanate component and a polyhydric alcohol component is disclosed. The ratio of the NCO equivalent isocyanate groups to the OH equivalent groups used in approximately equal to 1. The isocyanate component comprises a mixture of 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate (isocyanate I) and bis-4-isocyanatocyclohexylmethane (isocyanate II), in a proportion of an isocyanate (I) NCO equivalent of 0.1 to 0.8, and of an isocanate (II) NCO equivalent, with the total NCO equivalent being about 1. The layer according to the invention is used in laminated glass containing at least one sheet of glass and one layer of a plastic material.