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:
Dec. 04, 2007
Filed:
Jun. 01, 2005
Kazuyuki Nishioka, Kobe, JP;
Takahiro Mabuchi, Kobe, JP;
Katsumi Terakawa, Kobe, JP;
Kiyoshige Muraoka, Kobe, JP;
Kazuyuki Nishioka, Kobe, JP;
Takahiro Mabuchi, Kobe, JP;
Katsumi Terakawa, Kobe, JP;
Kiyoshige Muraoka, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Abstract
The present invention provides a rubber composition, in which abrasion resistance and gripping performance are improved in a balanced manner and bleeding of the components is inhibited, and a tire using the composition. Specifically, the present invention provides a rubber composition comprising (B) 10 to 200 parts by weight of a low molecular weight aromatic vinyl-conjugated diene copolymer having weight average molecular weight of 1.0×10to 1.0×10and aromatic vinyl content of 10 to 75% by weight, wherein the hydrogenation ratio of double bonds in the conjugated diene part is 20 to 60%, based on (A) 100 parts by weight of a rubber component containing at least 60% by weight of a styrene-butadiene copolymer having weight average molecular weight of 5.0×10to 2.5×10and styrene content of 20 to 60% by weight, wherein the amount of vinyl bonds in the butadiene part is 20 to 70%; which satisfies the following equation5% by weight<<(+10% by weight)when As (% by weight) is the styrene content of copolymer (A) and Bv (% by weight) is the aromatic vinyl content in the butadiene part of copolymer (B), and a tire using the same.