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:
Mar. 15, 2016
Filed:
Jun. 26, 2012
Daisuke Sato, Kobe, JP;
Daisuke Sato, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-Shi, JP;
Abstract
Provided are a rubber composition achieving balanced improvements in fuel economy, wet-grip performance, abrasion resistance, and handling stability, and a pneumatic tire including the composition. The rubber composition includes a rubber component including at least 95% by mass of conjugated diene polymers having a Tg of −75-0° C. and a Mw of 1.5×10-1.5×10, the rubber component (100% by mass) including 5-65% by mass of SBR (A) having a styrene content of at least 5% by mass but less than 15% by mass and a vinyl bond content of 10-70 mol %, and 20-75% by mass of SBR (B) having a styrene content of at least 15% by mass but less than 30% by mass and a vinyl bond content of 10-70 mol %, the composition including, per 100 parts by mass of the rubber component, 1-30 parts by mass of a low-molecular-weight conjugated diene polymer having a Tg of −75-0° C. and a Mw of at least 1.0×10but less than 1.5×10, and 10-150 parts by mass of silica having a NSA of 40-400 m/g, the composition having a tan δ peak temperature of at least −20° C.