Rubber composition for tire treads

Details Rubber composition for tire treads Rubber composition for tire treads

1993-12-10

1995-07-04

Teskin, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524526, 524572, 525237, 5253321, 5253322, 525342, 152209R, C08L 906

Patent

active

054300860

ABSTRACT:
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 ML.sub.1+4 of 30 to 200 at 100.degree. 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 ml/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.degree. to +5.degree. 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.

REFERENCES:
patent: 4748168 (1988-05-01), Kawakami et al.
patent: 4946887 (1990-08-01), Takino et al.
patent: 5290878 (1994-03-01), Yamamoto et al.
Chem. Abs. 91(20): 158841p, Relationship of carbon black . . . .

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