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US 8,273,820 B2Granted
Rubber composition and tire
AssigneeBridgestone Corpopration
InventorsYuuta Hoshino, Takako Miyazaki, Kazunori Kaneda
Life of this patent
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AssigneeBridgestone Corpopration
InventorsYuuta Hoshino, Takako Miyazaki, Kazunori Kaneda
Estimating the term…
Provided are a rubber composition which is improved in dispersion of silica into a rubber composition and improved in both of a low heat build-up and abrasion resistance and which is suitable as a tire tread member and a tire prepared by using the same. In a rubber composition compounded with precipitated silica, a cetyltrimethylammonium bromide-adsorbing specific surface area (CTAB) (m2/g) and the mode Aac (nm) in diameters of primary aggregates determined by acoustic measurement of particle size distribution satisfy equation (I) shown below: Aac≧−0.76×(CTAB)+274 and further an ignition loss (mass reduction % when heated at 750° C. for 3 hours) and a heating loss (mass reduction % when heated at 105° C. for 2 hours) satisfy equation (II) shown below: (ignition loss)−(heating loss)≦3.
A rubber composition compounded with precipitated silica, wherein the rubber component is at least one rubber selected from the group consisting of natural rubber, synthetic polyisoprene rubber, polybutadiene rubber, and styrene-butadiene rubber and wherein in the precipitated silica, a cetyltrimethylammonium bromide-adsorbing specific surface area (CTAB) (m2/g) and the mode Aa, (nm) in diameters of primary aggregates determined by an acoustic measurement of particle size distribution satisfy equation (I) shown below:
Dependencies are inferred from the claim text.