Title:
RUBBER COMPOSITION FOR TIRES
Document Type and Number:
WIPO Patent Application WO/2013/008927
Kind Code:
A1
Abstract:
Provided is a rubber composition for tires, which is capable of further improving low rolling resistance and wet performance in comparison to the conventional levels. The rubber composition for tires is characterized by being obtained by blending 2-50 parts by weight of an aromatic modified terpene resin having a softening point of 100°C or more and 60-130 parts by weight in total of two kinds of silica, namely silica-X and silica-Y into 100 parts by weight of a diene rubber that contains 5-50% by weight of a modified S-SBR having a vinyl unit content of 60% by weight or more. The rubber composition for tires is also characterized in that: a functional group of the modified S-SBR is reactive with a silanol group; the ratio of silica to the total amount of reinforcing fillers including silica and carbon black is 85% by weight or more; the silica-X has a nitrogen adsorption specific surface area of 140 m2/g or more; the silica-Y has a nitrogen adsorption specific surface area of 100 m2/g or more but less than 140 m2/g; and the relation of x/7 < y ≤ x is satisfied when the blending amounts of the silica-X and the silica-Y per 100 parts by weight of the diene rubber are respectively represented by x (parts by weight) and y (parts by weight).
Inventors:
TAKEDA SHINYA (JP)
Application Number:
PCT/JP2012/067982
Publication Date:
January 17, 2013
Filing Date:
July 13, 2012
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
TAKEDA SHINYA (JP)
TAKEDA SHINYA (JP)
International Classes:
C08L15/00; B60C1/00; C08K3/04; C08K3/36; C08L45/00
Foreign References:
| JP2009138157A | 2009-06-25 | |||
| JP2011132307A | 2011-07-07 | |||
| JP2011094012A | 2011-05-12 | |||
| JP2008274120A | 2008-11-13 | |||
| JP2011001435A | 2011-01-06 | |||
| JP2008101127A | 2008-05-01 | |||
| JP2009263587A | 2009-11-12 |
Attorney, Agent or Firm:
Seiryu Patent Professional Corporation et al. (JP)
Clear stream international patent business corporation (JP)
Clear stream international patent business corporation (JP)
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Claims: