IDiyas

For the Inventor, By the Inventor

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.:

US 9845385 B1

PDFFull Text
Date of Patent:
Dec. 19, 2017

Filed:

Apr. 27, 2012

Rubber composition and pneumatic tire

Applicants:

Takahiro Mabuchi, Kobe, JP;

Tatsuhiro Tanaka, Kobe, JP;

Kazuyuki Nishioka, Kobe, JP;

Kenichi Uesaka, Kobe, JP;

Inventors:

Takahiro Mabuchi, Kobe, JP;

Tatsuhiro Tanaka, Kobe, JP;

Kazuyuki Nishioka, Kobe, JP;

Kenichi Uesaka, Kobe, JP;

Assignee:

SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-Shi, Hyogo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Alexander Kollias

Int. Cl.
CPC ...
C08L 9/06 (2006.01); C08K 3/36 (2006.01); C08L 9/00 (2006.01); C08L 15/00 (2006.01); B60C 1/00 (2006.01); C08C 19/44 (2006.01); C08F 236/10 (2006.01);
U.S. Cl.
CPC ...
C08L 9/06 (2013.01); B60C 1/0016 (2013.01); C08C 19/44 (2013.01); C08K 3/36 (2013.01); C08L 9/00 (2013.01); C08L 15/00 (2013.01); C08F 236/10 (2013.01); Y02T 10/862 (2013.01);
Abstract

The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, abrasion resistance, and kneading processability in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component and silica, wherein the rubber component contains, based on 100% by mass of the rubber component, 10 to 70% by mass of a high-cis polybutadiene having a cis content of 95% by mass or more and satisfying the following requirements (A) to (C): (A) a Mooney viscosity (ML) of 40 to 49; (B) a molecular weight distribution (weight-average molecular weight (Mw)/number-average molecular weight (Mn)) of 3.0 to 3.9; and (C) an index (n-value in Expression (1) below) of velocity dependence of Mooney viscosity of 2.3 to 3.0, and 30 to 90% 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, and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component,log()=log()+×log()  (Expression 1)wherein RS indicates the number of revolutions per minute of a rotor, K indicates an arbitrary number, and ML indicates a Mooney viscosity,

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