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:
Jun. 18, 1985
Filed:
Mar. 30, 1983
Keisaku Yamamoto, Ichihara, JP;
Nobuyuki Yoshida, Ichihara, JP;
Yasushi Okamoto, Ichihara, JP;
Akio Imai, Ichihara, JP;
Tomoaki Seki, Ichihara, JP;
Hiroshi Furukawa, Ashiya, JP;
Yuichi Saito, Nishinomiya, JP;
Sumitomo Chemical Company, Ltd., Osaka, JP;
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Abstract
A branched polymer which is a butadiene homopolymer or a copolymer of an aromatic vinyl compound and butadiene and has a glass transition temperature of not less than -50.degree. C. and of which at least 70% by weight of the polymer chains has a branched structure in which high molecules are coupled by a trifunctional or tetrafunctional coupling agent, has an excellent roll processability as required in mixing a rubber component with additives and provides a rubber component for tire tread showing a low rolling resistance and an excellent wet skid resistance characteristic.