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:
Feb. 25, 1992
Filed:
Jun. 05, 1990
Rene Muller, Yerres, FR;
Gerard Daude, Villenave D'Ornon, FR;
Saint-Gobain Vitrage International, Aubervilliers Cedex, FR;
Abstract
A coating layer of a thermohardening polyurethane having self-cicatrization properties is prepared by preparing a reactive mixture of an isocyanate component which is a diisocyanate or a mixture of diisocyanate monomers capable of forming an isocyanate trimer, a polyol monomer having a functionality of at least 2 and a trimerization catalyst; placing the reactive mixture onto a support for formation of said layer; heating the reactive mixture to a temperature sufficient to initiate trimerization; and then further heating the reactive mixture to initiate and conduct polymerization thereby forming said polyurethane layer.