Patent ID: 11866586
Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC B  C | IPC C

Claim 0:
1. A tire rubber composition, comprising:
one or more rubber components having a combined content of styrene-butadiene rubber and polybutadiene of 90% by mass or more;
one or more fillers; and
one or more vulcanizing agents,
the rubber composition as a whole having a vinyl content of 20 mol % or higher and a trans content of 50 mol % or higher, each based on 100 mol % of a combined amount of butadiene-based structural units in a butadiene portion of the styrene-butadiene rubber and the polybutadiene,
wherein the rubber composition comprises the styrene-butadiene rubber and the polybutadiene, and
at least a portion of the polybutadiene rubber has a trans content of 45 mol % or higher.