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Title:
RUBBER COMPOSITION AND TIRE
Document Type and Number:
WIPO Patent Application WO/2017/126629
Kind Code:
A1
Abstract:
As a rubber composition capable of greatly improving on-ice performance while suppressing a decrease in abrasion resistance of a tire, the present invention provides a rubber composition characterized by the following: containing silica and at least three types of diene-based polymers that form a plurality of mutually incompatible polymer phases; in that a diene-based polymer (B), which is blended at a quantity of 10 mass% or more relative to the total quantity of the diene-based polymers and which does not have the lowest or the highest glass transition temperature (Tg) among the diene-based polymers, is modified by a silicon atom-containing compound, and satisfies the relationship represented by the formula St+Vi/2 ≤ 33 [in the formula, St is the content (mass%) of bonded styrene in the diene-based polymer (B) and Vi is the quantity (mass%) of vinyl bonds in the conjugated diene compound portion of the diene-based polymer (B)]; and in that the blending quantity of the silica is 25 parts by mass or more relative to a total of 100 parts by mass of the diene-based polymers.

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Inventors:
NUKAGA HIDEYUKI (JP)
Application Number:
PCT/JP2017/001809
Publication Date:
July 27, 2017
Filing Date:
January 19, 2017
Export Citation:
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Assignee:
BRIDGESTONE CORP (JP)
International Classes:
C08L9/00; B60C1/00; C08K3/04; C08K3/36; C08L7/00; C08L15/00
Domestic Patent References:
WO2012160938A12012-11-29
WO2012176538A12012-12-27
WO2003046020A12003-06-05
Foreign References:
JP2012046602A2012-03-08
JP2004238619A2004-08-26
JP2001011237A2001-01-16
JP2005263893A2005-09-29
JP2011094031A2011-05-12
JP2008303334A2008-12-18
JP2004513987A2004-05-13
JPH1129603A1999-02-02
JP2003113202A2003-04-18
JPH0629338B21994-04-20
JP2003534426A2003-11-18
JP2002201310A2002-07-19
JP2012219245A2012-11-12
Other References:
See also references of EP 3406663A4
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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