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Title:
RUBBER COMPOSITION FOR TIRE TREAD AND PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2019/221180
Kind Code:
A1
Abstract:
Provided are: a rubber composition for tire treads which gives tires excellent in terms of wet performance, rolling performance, and dry driving stability performance; and a pneumatic tire obtained using the rubber composition for tire treads. The rubber composition for tire treads of the present invention comprises conjugated-diene-based rubbers comprising 30 mass% or more specific conjugated-diene-based rubber produced by a method for conjugated-diene-based-rubber production, the method including a specific step, and 20 mass% or more styrene/butadiene rubber, a given amount of silica, and a given amount of a silane coupling agent, wherein the specific conjugated-diene-based rubber has a content of aromatic vinyl monomer units of 20-80 mass%, includes conjugated-diene monomer units, which have a vinyl bond content of 20-80 mass%, and has a glass transition temperature and a weight-average molecular weight that are within given ranges.

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Inventors:
SATO MASAKI (JP)
KAZARIYA AYAKI (JP)
SAWA HIDEAKI (JP)
ASHIURA MAKOTO (JP)
Application Number:
PCT/JP2019/019335
Publication Date:
November 21, 2019
Filing Date:
May 15, 2019
Export Citation:
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Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
C08L15/00; B60C1/00; C08C19/42; C08F236/10; C08F297/04; C08K3/36; C08K5/5415; C08L9/06; C08F2/14
Domestic Patent References:
WO2016208739A12016-12-29
WO2018092716A12018-05-24
Foreign References:
JP2017082235A2017-05-18
JP2017133026A2017-08-03
JP2017110230A2017-06-22
JP2017082236A2017-05-18
JP2016047887A2016-04-07
JP2016047883A2016-04-07
Other References:
See also references of EP 3795629A4
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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