RUBBER COMPOSITION FOR SIDE WALL AND PNEUMATIC TIRE

Title:

RUBBER COMPOSITION FOR SIDE WALL AND PNEUMATIC TIRE

Document Type and Number:

WIPO Patent Application WO/2013/008798

Kind Code:

A1

Abstract:

The present invention provides: a rubber composition for a side wall which improves, with a good balance, low fuel consumption, steering stability, fracture resistance, total elongation and workability, and which can suppress occurrence of spew cutting during demolding of a tire; and a pneumatic tire using the same. The present invention relates to a rubber composition for a side wall which comprises, in 100 mass% of a rubber component, a total content of a butadiene rubber containing 1,2-syndiotactic polybutadiene crystals and a butadiene rubber synthesized using a rare earth element catalyst of 5-60 mass%, a content of an end modified butadiene rubber of 7-60 mass%, and a content of an isoprene rubber of 20-70 mass%, and with respect to 100 parts by mass of the rubber content, the total content of a carbon black with a nitrogen adsorption specific surface area of 25-120 m2/g and a silica with a nitrogen adsorption specific surface area of 70-250 m2/g is 20-40 parts by mass, and the content of a zinc oxide is 3.6-16 parts by mass.

Inventors:

MIYAZAKI TATSUYA (JP)

Application Number:

PCT/JP2012/067524

Publication Date:

January 17, 2013

Filing Date:

July 10, 2012

Export Citation:

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Assignee:

SUMITOMO RUBBER IND (JP)
MIYAZAKI TATSUYA (JP)

International Classes:

C08L9/00; B60C1/00; C08J3/24; C08K3/04; C08K3/22; C08K3/36; C08L15/00

Foreign References:

JP2010058782A	2010-03-18
JP2011116823A	2011-06-16
JP2009155631A	2009-07-16
JP2006063143A	2006-03-09
JP2010084059A	2010-04-15
JP2010095705A	2010-04-30
JP2006063143A	2006-03-09
JP2010111753A	2010-05-20
JPH0653768B2	1994-07-20
JPH0657767B2	1994-08-03

Other References: