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Title:
RUBBER COMPOSITION AND PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2013/099324
Kind Code:
A1
Abstract:
The present invention provides a rubber composition and a pneumatic tire using same that are capable of improving fuel economy, wet grip performance, wear resistance, and steering stability in a well-balanced manner. The present invention relates to a rubber composition in which a rubber component contains 95 mass% or more of a conjugated diene polymer for which Tg is -75° to 0°C and Mw is 1.5×105 to 1.5×106, and 100 parts by mass of the rubber component contain: 5-65 mass% of an SBR (A) containing at least 5% and less than 15% by mass of styrene and having a vinyl bond content of 10-70 mol%; and 20-75 mass% of an SBR (B) containing at least 15% and less than 30% by mass of styrene and having a vinyl bond content of 10-70 mol%. In 100 parts by mass of the rubber component, the amount of the conjugated diene polymer with a low molecular weight, said polymer having a Tg of -75° to 0°C and a Mw of at least 1.0×103 and less than 1.5×105,is 1-30 parts by mass, the amount of silica having 40-400 m2/g of N2SA is 10-150 parts by mass, and the tanδ peak temperature is at least -20°C.

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Inventors:
SATO DAISUKE (JP)
Application Number:
PCT/JP2012/066204
Publication Date:
July 04, 2013
Filing Date:
June 26, 2012
Export Citation:
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Assignee:
SUMITOMO RUBBER IND (JP)
SATO DAISUKE (JP)
International Classes:
C08L9/06; B60C1/00; C08C19/22; C08C19/25; C08F230/08; C08F236/10; C08K3/36; C08L15/00
Domestic Patent References:
WO2012011571A12012-01-26
Foreign References:
JP2012167257A2012-09-06
JPS6399252A1988-04-30
JP2009001721A2009-01-08
JPS56131640A1981-10-15
JP2007197671A2007-08-09
JP2001151940A2001-06-05
JP2008101158A2008-05-01
JPH08231766A1996-09-10
JP2000239444A2000-09-05
JP2011079913A2011-04-21
JPH08253520A1996-10-01
JPS4817674B11973-05-31
JP2010077413A2010-04-08
JP2000344955A2000-12-12
Other References:
See also references of EP 2787031A4
Attorney, Agent or Firm:
YASUTOMI & Associates (JP)
Patent business corporation Yasutomi international patent firm (JP)
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Claims:



 
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