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:
Jan. 31, 1995
Filed:
Jul. 01, 1992
Applicant:
Inventors:
Assignee:
Daicel Chemical Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; C08F / ;
U.S. Cl.
CPC ...
526216 ; 526271 ; 526332 ;
Abstract
An improved process for the preparation of an alkyl vinyl ether/maleic anhydride copolymer in which copolymerization is carried out in an admixture of an ester and an hydrocarbon. The alkyl vinyl ether/maleic anhydride copolymer obtained by this process does not contain any harmful aromatic solvent such as benzene, etc. In addition, the alkyl vinyl ether/maleic anhydride copolymer has a higher apparent bulk density than can be obtained in prior processes.