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:
Apr. 10, 1984
Filed:
Apr. 26, 1982
Applicant:
Inventors:
Irving E Isgur, Framingham, MA (US);
William D DelVecchio, Randolph, MA (US);
Assignee:
W. R. Grace & Co., Cambridge, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
524839 ; 524591 ;
Abstract
Aqueous-based polyurethane elastomer compositions which can be used as adhesives and a method of preparing same are described. The polyurethane compositions are prepared by chain extending an isocyanate-terminated urethane prepolymer with an equivalent excess of water in the presence of a monofunctional isocyanate group blocking agent to provide a reaction mixture having a desired adhesive capability and thereafter adding additional blocking agent to the reaction mixture in an equivalent amount at least substantially equal to the remaining equivalent amount of unreacted isocyanate groups in the prepolymer.