Rubber composition for use in tire tread comprising a rubber com

Details Rubber composition for use in tire tread comprising a rubber com Rubber composition for use in tire tread comprising a rubber com

1987-10-27

1988-12-13

Henderson, Christopher

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

152209R, 5253325, C08C 1920, C08F 834

Patent

active

047911786

ABSTRACT:
A rubber composition for use in tire is disclosed which contains at least 30% by weight, relative to the entire rubber component, of a conjugated diene-monovinyl aromatic hydrocarbon copolymer which uses an organic lithium compound as an initiator. A percentage of vinyl bonds in conjugated diene units in the copolymer molecules is from 50 to 95% and the content of the monovinyl aromatic hydrocarbon units is from 10 to 50% by weight. As physical properties of the vulcanized rubber of the rubber composition, aromatic hydrocarbon copolymer, 200% tensile modulus is from 5 to 50 kgf/cm.sup.2 and a temperture integrated value of a loss tangent, ##EQU1## is from 16 to 56. The tread rubber composition is suitable for a tread of high performance tires, and is excellent in fracture strength, thermal resistance, wear resistance, and road gripping property.

REFERENCES:
patent: 4334567 (1982-06-01), Bond
patent: 4367325 (1983-01-01), Tekeuchi
patent: 4387757 (1983-06-01), Ogawa
patent: 4433094 (1984-02-01), Ogawa
patent: 4537939 (1985-08-01), Hall
patent: 4547560 (1985-10-01), Hattori

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