Rubber composition for tire
AssigneeBridgestone Tire Company Limited
InventorsTatsuo Fujimaki, Shinsuke Yamaguchi, Tomoharu Yamada, Seisuke Tomita
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Abstract
A rubber composition for tire having low rolling resistance and high wet skid resistance, breakage strength and wear resistance consists mainly of a rubber component containing at least 20 parts by weight of a high vinyl butadiene-styrene copolymer rubber obtained by copolymerizing randomly styrene with 1,3-butadiene, and containing 3-30% by weight of bonded styrene and 60-95% by weight of 1,2-bond in butadiene unit, and further containing metal-butadienyl bonds in its main chain in a weight fraction of at least 20% by weight.
Claims4
A rubber composition for a tire tread consisting mainly of a rubber component containing at least 20 parts by weight, based on 100 parts by weight of the rubber component, of a high vinyl butadiene-styrene copolymer rubber obtained by copolymerizing randomly styrene with 1,3-butadiene, and containing 3-30% by weight of bonded styrene and 60-95% by weight of 1,2-bond in the butadiene unit, and further containing bonds of at least one metal selected from silicon, germanium, tin and lead with butadienyl group in its main chain in a weight fraction of at least 20% by weight, wherein said rubber component is a diene rubber having a glass transition temperature not higher than -50.degree. C.
Dependencies are inferred from the claim text.