Rubber composition for tire treads

Details Rubber composition for tire treads Rubber composition for tire treads

C - Chemistry, Metallurgy

08

L

C08L 9/06 (2006.01) B60C 1/00 (2006.01) C08K 3/04 (2006.01) C08L 21/00 (2006.01)

Patent

CA 2111143

Abstract of the Disclosure A rubber composition for tire treads comprising a rubber component consisting essentially of (A) 20 to 100 % by weight of a solution-polymerized styrene-butadiene copolymer rubber having a Mooney viscosity ML1+4 of 30 to 200 at 100°C prepared by copolymerization of styrene, butadiene and a polyvinyl aromatic compound followed by coupling with a trifunctional or tetrafunctional coupling agent, and (B) 0 to 80 % by weight of at least one rubber selected from the group consisting of an emulsion- polymerized styrene-butadiene rubber, a butadiene rubber, natural rubber and a synthetic polyisoprene rubber; and (C) 50 to 250 parts by weight of a carbon black having an iodine adsorption number of not less than 60 mg/g and an oil absorption of not less than 110 m? /100 g per 100 parts by weight of said rubber component; the tan .delta. peak temperature Tg of the cured product of said rubber composition being from -40° to +5°C. The tread rubber composition can be processed without causing bagging with a good dispersibility of carbon black and provides tires having a low rolling resistance and a high grip characteristic.

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