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, 1978
Filed:
Jan. 02, 1976
Applicant:
Inventors:
Sakuji Ikeda, Tokyo, JA;
Kazuo Soga, Yokohama, JA;
Assignee:
Tokyo Institute of Technology, Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
526 111 ;
Abstract
There is provided a process of preparing polyesters having carbonyl group and ether linkage in the principal chain thereof by the reaction of carbon dioxide with vinyl compounds or diene compounds (diolefins) having Alfrey-Price's value of less than -0.9. Said reaction may be carried out in the presence of catalysts as shown below: alkoxides, acetylacetone complexes and alkyl compounds of titanium, magnesium, cobalt, manganese, zinc, aluminium, tin and mercury.