RUBBER COMPOSITION FOR TIRE TREAD

Japanese Patent JP3143753

B2

PURPOSE: To provide the rubber composition used for tire treads excellent in their road surface-gripping forces and containing a rubber component comprising a specific end-modified vinyl aromatic compound.diene copolymer and SBR produced by an emulsion polymerization method and/or by a solution polymerization method.
CONSTITUTION: The rubber composition for tire treads is characterized in that the rubber component comprises (A) 5-40 pts.wt. of an end-modified copolymer having a weight-average mol.wt. of 2000-50000 and produced by reacting (A1): an anion living vinyl aromatic compound.dienic copolymer with (A2): a compound selected from an N-substituted amino(thio)aldehyde compound, an N- substituted amino(thio)ketone compound and a compound having a bond of formula I (M is O or S), preferably an end-modified vinyl aromatic compound.butadiene copolymer satisfying inequalities II-IV (A is the weight % of the vinyl compound bonded in the copolymer; B is the percent of the vinyl bonds in the butadiene units), and (B) 95-60 pts.wt. of SBR having a weight-average mol.wt. of ≥800000 and produced by an emulsion polymerization method and/or by a solution polymerization method.

Hideyuki Oishi
Kazuyoshi Kayama
Atsushi Shimada
Takao Muraki
Kohei Kasai
Shuichi Akita

JP26071091A

March 07, 2001

October 08, 1991

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Yokohama Rubber Co., Ltd.
Nippon Zeon Co., Ltd.

C08L9/06; B60C1/00; C08L21/00; (IPC1-7): C08L9/06; B60C1/00

JP1230647A
JP60137913A
JP3281645A

Shinichi Ogawa (2 outside)

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