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:
Jul. 31, 1984
Filed:
Jun. 02, 1982
Yasumasa Takeuchi, Yokkaichi, JP;
Mitsuhiko Sakakibara, Yokkaichi, JP;
Fumio Tsutsumi, Yokkaichi, JP;
Akio Takashima, Yokkaichi, JP;
Tatsuo Fujimaki, Kodaira, JP;
Shinsuke Yamaguchi, Tokyo, JP;
Seisuke Tomita, Higashimurayama, JP;
Bridgestone Tire Company Limited, Tokyo, JP;
Japan Synthetic Rubber Co., Ltd., Tokyo, JP;
Abstract
A rubber composition suitable for use in tire tread is disclosed, which contains at least 20 parts by weight of a block copolymer per 100 parts by weight of total rubber content. This block copolymer comprises (A) a polymer segment obtained by starting from conjugated diolefin and monovinyl aromatic hydrocarbon and having a content of monovinyl aromatic hydrocarbon bond of not more than 10% by weight and (B) a copolymer segment obtained by copolymerization of conjugated diolefin and monovinyl aromatic hydrocarbon and having a content of monovinyl aromatic hydrocarbon bond of 15-50% by weight. Further, the block copolymer satisfies the following conditions: