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Patent Searching and Data


Title:
PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2019/026477
Kind Code:
A1
Abstract:
Provided is a pneumatic tire which has a tread part that is configured from a rubber composition for treads containing silica, and which has improved rolling resistance and improved wear resistance during high-speed travel, while maintaining excellent dry performance and excellent wet performance. According to the present invention, a tread part 1 is provided with a longitudinal groove 21 that extends in the tire circumferential direction and/or a transverse groove 22 that extends in the tire width direction; the groove area ratio Sin in the vehicle inside region of the tread part 1 is set to 30-39%; the difference ∆S between the groove area ratio Sin and the groove area ratio Sout in the vehicle outside region is set to 6-14%; and the tread part 1 is configured from a rubber composition for treads, which is obtained by blending from 80 parts by mass to 150 parts by mass of silica and from 0.5 part by mass to 10 parts by mass of a cyclic polysulfide per 100 parts by mass of a diene rubber that is composed of from 10 parts by mass to 30 parts by mass of a natural rubber and from 70 parts by mass to 90 parts by mass of a solution polymerized styrene butadiene rubber and/or an emulsion polymerized styrene butadiene rubber, and by additionally blending an alkyl triethoxy silane that has an alkyl group having 3-20 carbon atoms thereinto in an amount of from 3% by mass to 10% by mass relative to the amount of silica.

Inventors:
MURASE KEISUKE (JP)
Application Number:
PCT/JP2018/024220
Publication Date:
February 07, 2019
Filing Date:
June 26, 2018
Export Citation:
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Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
B60C1/00; B60C5/00; B60C11/03; C08K3/36; C08K5/45; C08L7/00; C08L9/06; C08L57/02
Domestic Patent References:
WO2015012160A12015-01-29
Foreign References:
JP2013213183A2013-10-17
JP2014210870A2014-11-13
JP2011252124A2011-12-15
JP2016065260A2016-04-28
JP2013224132A2013-10-31
Attorney, Agent or Firm:
SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)
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