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:
Mar. 04, 1980
Filed:
Jul. 10, 1978
Applicant:
Inventors:
Karl H Illers, Otterstadt, DE;
Herbert Stutz, Karlsruhe, DE;
Assignee:
BASF Wyandotte Corporation, Wyandotte, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 44 ; 528 74 ; 528 76 ; 528 83 ; 528 85 ;
Abstract
Polyurethane elastomers of improved heat stability are made by a process in which a polyisocyanate is reacted with a polyol of high molecular weight with an OH:NCO ratio of 1:0.66 to 1:0.85, and the resulting adduct is later reacted with an excess of symmetrical diisocyanate and a diol as chain extender.