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:
Apr. 04, 1978
Filed:
Mar. 29, 1976
Applicant:
Inventors:
Fumitake Imaizumi, Yokohama, JA;
Isao Nagaoka, Yokohama, JA;
Mitsuo Kurokawa, Yokohama, JA;
Koei Komatsu, Tokyo, JA;
Assignee:
Japan Synthetic Rubber Co., Ltd., Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
260879 ; 526 46 ; 526 56 ;
Abstract
A process for producing a maleic anhydride adduct of high molecular weight 1,2-polybutadiene by contacting with heat maleic anhydride with high molecular weight 1,2-polybutadiene in the absence of a radical initiator in a halogenated aromatic hydrocarbon solvent. The adduct obtained by this process has a high molecular weight of more than 10,000 and is quite free from gel. Said process enables the addition of maleic anhydride in any desired proportion.