Title:
RUBBER COMPOSITION FOR TIRE TREAD, AND PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2014/185495
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing: a rubber composition for a tire tread, said rubber composition exhibiting excellent workability, and, when configured as a tire, excellent wet performance, excellent low-rolling resistance, and excellent wear resistance; and a pneumatic tire in which said composition is used for a tire tread thereof. This rubber composition for a tire tread includes: a rubber component including at least 30 mass% of a conjugated diene-based rubber (A); silica (B); and a prescribed alkyltriethoxysilane (C). The conjugated diene-based rubber (A) includes at least 5 mass% of a specific structure (a). The silica (B) has a nitrogen adsorption specific surface area (N2SA) of 194-225 m2/g, and a CTAB specific surface area (CTAB) of 180-210 m2/g. The silica (B) content is 60-150 parts by mass per 100 parts by mass of the rubber component. The alkyltriethoxysilane (C) content is 2.5-8.0 mass% of the silica (B) content.
Inventors:
SATO MASAKI (JP)
ASHIURA MAKOTO (JP)
ASHIURA MAKOTO (JP)
Application Number:
PCT/JP2014/062967
Publication Date:
November 20, 2014
Filing Date:
May 15, 2014
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
C08L9/00; B60C1/00; C08G81/02; C08K3/36; C08K5/5419; C08L87/00
Domestic Patent References:
| WO2012035998A1 | 2012-03-22 | |||
| WO2011105362A1 | 2011-09-01 |
Attorney, Agent or Firm:
WATANABE Mochitoshi et al. (JP)
Mochitoshi Watanabe (JP)
Mochitoshi Watanabe (JP)
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