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. 31, 1977
Filed:
Apr. 07, 1976
Applicant:
Inventors:
Gerhard Leu, Schlieren, CH;
Ueli Sulser, Oberengstringen, CH;
Jurg Widmer, Zurich, CH;
Heinz Goeth, Bulach, CH;
Assignee:
Sika AG, vormals Kaspar Winkler & Co., Zurich, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C08K / ;
U.S. Cl.
CPC ...
260 / ; 260 / ; 260 / ;
Abstract
A method of manufacturing polyurethane prepolymers containing free, reactive end groups of polyisocyanate and compounds with active H-atoms, while using a tertiary amine as the catalyst, and thereafter deactivating the catalyst by reacting with an alkyl halide.