Title:
TIRE RUBBER COMPOSITION AND PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2013/051679
Kind Code:
A1
Abstract:
Provided are: a tire rubber composition which enables low fuel consumption properties and wear resistance properties to be improved while maintaining or improving a good wet grip performance; and a pneumatic tire which uses said composition. The present invention pertains to a tire rubber composition which contains a rubber component containing a diene polymer (1), silica, and a diene polymer (2), wherein: the diene polymers (1, 2) are modified diene polymers obtained by reacting (A) and (B) below; the number average molecular weight of the diene polymer (1) is 110,000 to 1,500,000; the number average molecular weight of the diene polymer (2) is 1,000 to 100,000; and the content of the diene polymer (2) with respect to 100 parts by mass of the rubber component is 2 to 25 parts by mass. (A) is an active conjugated diene polymer having an alkali metal terminal obtained by polymerizing conjugated diene monomers or a conjugated diene monomer and an aromatic vinyl monomer under the presence of (C) below. (B) is a denaturant having a functional group. (C) is a chemical species obtained by reacting a compound represented by formula (1) with an organic alkali metal compound.
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Inventors:
ISHINO SOH (JP)
Application Number:
PCT/JP2012/075894
Publication Date:
April 11, 2013
Filing Date:
October 05, 2012
Export Citation:
Assignee:
SUMITOMO RUBBER IND (JP)
International Classes:
C08L15/00; B60C1/00; C08C19/00; C08K3/36; C08K5/548
Domestic Patent References:
| WO2010044252A1 | 2010-04-22 | |||
| WO2011087004A1 | 2011-07-21 |
Foreign References:
| JP2008143952A | 2008-06-26 | |||
| JP2009533529A | 2009-09-17 | |||
| JP2008195791A | 2008-08-28 | |||
| JP2006306962A | 2006-11-09 | |||
| JP2011178958A | 2011-09-15 | |||
| JP2011144265A | 2011-07-28 | |||
| JP2011219699A | 2011-11-04 | |||
| JP2001114938A | 2001-04-24 |
Other References:
See also references of EP 2746332A4
"Rubber, unvulcanized - Physical property - Part 1: Determination of Mooney viscosity and pre-vulcanization characteristics with Mooney viscometer", JIS K 6300-1
"Rubber, unvulcanized - Physical property - Part 1: Determination of Mooney viscosity and pre-vulcanization characteristics with Mooney viscometer", JIS K 6300-1
Attorney, Agent or Firm:
YASUTOMI & Associates (JP)
Patent business corporation Yasutomi international patent firm (JP)
Patent business corporation Yasutomi international patent firm (JP)
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Claims: