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:
Jul. 23, 1991
Filed:
Jan. 11, 1990
Applicant:
Inventors:
Assignee:
GAF Chemicals Corporation, Wayne, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526271 ;
Abstract
A polymerization process is described herein for making crosslinked copolymers of maleic anhydride and an alkyl vinyl ether characterized in that polymerization is carried out in a solvent system which is a mixture of a carboxylic acid ester and a saturated hydrocarbon, preferably a mixture of ethyl acetate and cyclohexane in the weight ratio of about 35% to 55% ethyl acetate and 45% to 65% cyclohexane.