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:
Nov. 09, 1999
Filed:
Mar. 27, 1997
Applicant:
Inventors:
Yueting Chou, Chesterfield, MO (US);
Dennis J Kalota, Fenton, MO (US);
David Albert Martin, Angel Fire, NM (US);
Assignee:
Solutia Inc., St. Louis, MO (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
5483391 ; 435-6 ; 435-72 ; 436521 ; 436536 ; 5303913 ; 536 231 ; 5363915 ; 548542 ;
Abstract
A first embodiment comprises reacting PSI with polyhydrazide selected from the group consisting of dihydrazides and trihydrazides and mixtures thereof, subsequently hydrolyzing the crosslinked PSI with base to produce crosslinked polyaspartate. A second embodiment comprises reacting PSI with hydrazine to form an intermediate product which is reacted with polyacyl chloride or polyester to produce crosslinked PSI followed by hydrolysis to form crosslinked salt. Isolation of the intermediate before reaction with the polyacyl chloride or polyester is unnecessary.