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. 26, 1988
Filed:
Apr. 08, 1986
Applicant:
Inventors:
Mitsuhiko Sakakibara, Yokkaichi, JP;
Kaoru Nakako, Yokkaichi, JP;
Tatsuo Fujimaki, Higashimurayama, JP;
Assignees:
Bridgestone Corporation, both of, JP;
Japan Synthetic Rubber Co., Ltd., both of, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08L / ; C08L / ;
U.S. Cl.
CPC ...
525 99 ; 525232 ; 525236 ; 525245 ; 525247 ; 525314 ; 525 98 ; 526120 ; 526157 ; 526337 ;
Abstract
A diene polymer composition having improved fracture properties and a small change in the shape of extruded product is disclosed, which comprises at least 5% by weight of a copolymer composed of at least one conjugated diene (component A) having the following general formula: ##STR1## wherein R.sub.1 and R.sub.2 are a hydrogen atom or a methyl group, and 2,3-dimethylbutadiene (component B), said copolymer having a content of cis-1,4-bond of not less than 80%.