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:
May. 10, 1994
Filed:
Jun. 09, 1992
Applicant:
Inventors:
Leanirith Yean, Longjumeau, FR;
Christophe Bochu, Maisons-Alfort, FR;
Assignee:
Essilor International (Compagnie Generale d'Optique), Creteil, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 44 ; 528 45 ; 528 59 ; 528 61 ; 528 67 ; 528 76 ; 4284231 ; 160 25 ;
Abstract
The present patent application relates to a polyurethane composition for organic glasses characterized in that it comprises: a first constituent formed by a polyisocyanate at least di-functional, and a second constituent formed by an acyclic saturated monomer bearing at least three reactive functions with respect to isocyanates to form carbamate links, among which reactive functions at least 40% in number are --SH mercapto groups, the proportion of the reactive functions being at least 45% by weight with respect to the molecular weight of the monomer.