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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.:

US 5147925 B1

PDFFull Text
Date of Patent:
Sep. 15, 1992

Filed:

Feb. 14, 1991

Production of polyurethane polymers, the polymers so produced, and

Applicant:
Inventors:

David A Pears, Grindlaan, NL;

Martinus P Heuts, Echt, NL;

Assignees:

Imperial Chemical Industries PLC, London, GB;

ICI Resins BV, Waalwijk, NL;

Attorney:

Cushman, Darby & Cushman

Primary Examiner:

Maurice J Welsh

Assistant Examiner:

Rachel Johnson

Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
524589 ; 524590 ; 524591 ; 524839 ; 524840 ; 524871 ; 524874 ; 525453 ; 528 59 ; 528229 ;
Abstract

A polyurethane polymer having desired chain-pendant or in-chain groups Y is prepared by 1) converting terminal isocyanate groups of an isocyanate-terminated polyurethane prepolymer to groups providing carbon- or nitrogen-bound --NH.sub.2 and/or --NH-- groups, and 2) chain extending modified prepolymer formed in 1) with a compound having at least two enolic carbonyl groups and also having at least one group Y which becomes chain-pendant or in-chain in the chain-extended polymer.

Find Patent Forward Citations

Pears, David. (1992). Production of polyurethane polymers, the polymers so produced, and (U.S. Patent No. 5147925). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5147925

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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