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:
Dec. 23, 1997
Filed:
Aug. 18, 1995
Applicant:
Inventors:
Robert Allison Grigsby, Jr, Austin, TX (US);
Robert LeRoy Zimmerman, Austin, TX (US);
Assignee:
Huntsman Petrochemical Corporation, Austin, TX (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
521128 ; 521159 ; 521163 ; 521174 ; 528 48 ; 528 52 ; 528 59 ; 528 60 ; 528 65 ; 528 76 ;
Abstract
A process, and the product produced thereby, for preparing a polyurea foam which comprises reacting an aliphatic polyamine having an average functionality from about 2 to about 6 wherein about 55 to about 95 percent of the functional groups are primary amine functional groups and about 5 to about 40 percent of the functional groups are primary or secondary hydroxyl groups with a polyisocyanate in the presence of a blowing agent that comprises water. The use of polyether polyamines having primary hydroxyl groups improves the cross-linking characteristics of the polyurea foam.