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Title:
RUBBER COMPOSITION FOR TIRE TREADS AND PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2018/131694
Kind Code:
A1
Abstract:
Provided are: a rubber composition for tire treads, which is formed into a tire that exhibits excellent on-ice performance, wet grip performance, low heat generation properties and wear resistance; and a pneumatic tire which uses this rubber composition for tire treads in a tread. This rubber composition for tire treads contains a diene rubber, a silica and a cured product; and the content of the silica is 20-100 parts by mass relative to 100 parts by mass of the diene rubber, while the content of the cured product is 0.3-30 parts by mass relative to 100 parts by mass of the diene rubber. The diene rubber contains a natural rubber and a modified butadiene rubber which has a polyorganosiloxane group at an end; the content of the natural rubber in the diene rubber is 30-90% by mass; and the content of the modified butadiene rubber in the diene rubber is 10-70% by mass. The cured product is obtained by curing a crosslinkable oligomer or polymer, which is not compatible with the diene rubber; and the cured product has a JIS A hardness of 3-45.

Inventors:
NAKAGAWA Ryutaro (C/O The Yokohama Rubber Co, LTD. Hiratsuka Factory 2-1, Oiwake, Hiratsuka Cit, Kanagawa 01, 〒2548601, JP)
SUGIURA Hiroki (C/O The Yokohama Rubber Co, LTD. Hiratsuka Factory 2-1, Oiwake, Hiratsuka Cit, Kanagawa 01, 〒2548601, JP)
Application Number:
JP2018/000725
Publication Date:
July 19, 2018
Filing Date:
January 12, 2018
Export Citation:
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Assignee:
THE YOKOHAMA RUBBER CO., LTD. (36-11, Shimbashi 5-chome Minato-k, Tokyo 85, 〒1058685, JP)
International Classes:
C08L9/00; B60C1/00; C08K3/36; C08K9/10; C08L7/00; C08L101/00
Foreign References:
JP2010155935A2010-07-15
JP2015067636A2015-04-13
JP2009286822A2009-12-10
JP2016108428A2016-06-20
JP2014173062A2014-09-22
JP2003253051A2003-09-10
JP2009179754A2009-08-13
JP2016145340A2016-08-12
JP2015067636A2015-04-13
Attorney, Agent or Firm:
WATANABE Mochitoshi et al. (Yusen Iwamoto-cho Bldg. 6F, 3-3 Iwamoto-cho 2-chome, Chiyoda-k, Tokyo 32, 〒1010032, JP)
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