Rubber composition and tire
AssigneeBridgestone Corporation
InventorsTomoki Higa, Kenji Nakatani
Life of this patent
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Abstract
The rubber composition of this disclosure is a rubber composition comprising a rubber component containing 2 or more polymer components and a filler containing at least a silica, wherein: the rubber component is separated into two or more polymer phases with different peak temperatures of tan δ temperature dispersion curve; a compounding amount of the filler per 100 parts by mass of the rubber component is 30 to 130 parts by mass; 30 mass % or more of the filler exists in the polymer phase with the lowest peak temperature of tan δ temperature dispersion curve; and the filler has an average aggregate area of 2100 nm2 or less.
Claims20
A rubber composition comprising a rubber component containing 2 or more polymer components and a filler containing at least a silica, wherein:
- the rubber component is separated into two or more polymer phases with different peak temperatures of tan δ temperature dispersion curve;
- a peak temperature of tan δ temperature dispersion curve of a polymer phase with a lowest peak temperature of tan δ temperature dispersion curve among the two or more polymer phases is −110° C. to −20° C.;
- a peak temperature of tan δ temperature dispersion curve of a polymer phase with a highest peak temperature of tan δ temperature dispersion curve among the two or more polymer phases is −10° C. to 10° C.;
- a compounding amount of the filler per 100 parts by mass of the rubber component is 30 to 130 parts by mass;
- 30 mass % or more of the filler exists in the polymer phase with the lowest peak temperature of tan δ temperature dispersion curve;
- and
- the filler has an average aggregate area of 2100 nm2 or less.
Dependencies are inferred from the claim text.