Rubber composition for tire, tread rubber, and tire
AssigneeBridgestone Corporation
InventorNaoya OSHIMA
Life of this patent
Estimating the term…
Abstract
Provided is a rubber composition for tire capable of highly balancing wet grip performance with fuel efficiency and wear resistance in a tire. The present disclosure provides a rubber composition containing a rubber component and a filler containing at least silica, where the rubber component contains a styrene-butadiene rubber (A) having a glass transition temperature of −50° C. or lower, which is obtained by modifying a compound represented by the formula (1) with a modifying agent, and an unmodified styrene-butadiene rubber (B) whose glass transition temperature is 30° C. or more higher than that of the styrene-butadiene rubber (A).
Claims20
A rubber composition for tire, which is a rubber composition comprising a rubber component and a filler containing at least silica, wherein
- the rubber component comprises a styrene-butadiene rubber (A) having a glass transition temperature of −50° ° C. or lower, which is obtained by modifying a compound represented by the formula (1) with a modifying agent, and an unmodified styrene-butadiene rubber (B) whose glass transition temperature is 30° C. or more higher than that of the styrene-butadiene rubber (A), where
- in the formula, R1 to R8 are each independently an alkyl group having 1 to 20 carbon atoms;
- L1 and L2 are each independently an alkylene group having 1 to 20 carbon atoms;
- and n is an integer of 2 to 4.
Dependencies are inferred from the claim text.