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:
Mar. 13, 1990
Filed:
Oct. 03, 1988
Applicant:
Inventors:
Hans-Helmut Goertz, Freinsheim, DE;
Ferdinand Straub, Hockenheim, DE;
Friedrich Vogel, Wachenheim, DE;
Franz Frosch, Ludwigshafen, DE;
Paul Naegele, Otterstadt, DE;
Hans-Juergen Raubenheimer, Ketsch, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
525304 ; 5253277 ; 525376 ;
Abstract
Copolymers of monoalkyl maleates and vinyl alkyl ethers are prepared by free radical copolymerization of maleic anhydride and a vinyl alkyl ether followed by reaction with an alkanol, by a process in which the vinyl alkyl ether component is present in excess in the reaction mixture in each phase of the polymerization, the free radical copolymerization is carried out in acetone and the acetone is removed by distillation during or after ester formation at up to 70.degree. C.