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:
Nov. 10, 2015
Filed:
Apr. 17, 2012
Takafumi Taguchi, Kobe, JP;
Kenichi Uesaka, Kobe, JP;
Yoji Imoto, Kobe, JP;
Satomi Yamauchi, Kobe, JP;
Yoshihiro Kagawa, Kobe, JP;
Takafumi Taguchi, Kobe, JP;
Kenichi Uesaka, Kobe, JP;
Yoji Imoto, Kobe, JP;
Satomi Yamauchi, Kobe, JP;
Yoshihiro Kagawa, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-shi, JP;
Abstract
The invention provides a rubber composition that can enhance fuel economy, wet-grip performance, abrasion resistance, and handling stability in a balanced manner, and a pneumatic tire using this composition. The invention relates to a rubber composition containing a rubber component, silica (1) having a nitrogen adsorption specific surface area of not more than 100 m/g, and silica (2) having a nitrogen adsorption specific surface area of at least 180 m/g, wherein the rubber component contains, based on 100% by mass of the rubber component, at least 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; and a total amount of silica (1) and silica (2) is 30-150 parts by mass per 100 parts by mass of the rubber component,