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. 01, 1991
Filed:
Aug. 03, 1989
Applicant:
Inventors:
Hideshi Kawachi, Yamaguchi, JP;
Shuji Minami, Yamaguchi, JP;
John N Armor, Allentown, PA (US);
Andrzej Rokicki, Allentown, PA (US);
Beatrice K Stein, Allentown, PA (US);
Assignee:
Mitsui Petrochemical Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528405 ; 502151 ; 502170 ;
Abstract
According to the present invention, a zinc-containing solid catalyst prepared by contacting zinc oxide with an organic dicarboxylic acid in the presence of or in the absence of an organic solvent under a mechanical pulverization treatment is provided. The catalyst is in a good pulverized state and exhibits a high catalytic activity for polymerization of carbon dioxide with an epoxide to obtain a polyalkylene carbonate.