Rubber formulations for tire
OwnerMakio Mori, Takeshi Hotakainventors
Life of this patent
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Abstract
A rubber composition for a tire tread containing 100 parts by weight of a diene-based rubber, 2 to 50 parts by weight of precipitated silica, 1 to 25 parts by weight of heat expandable microcapsules, or 1 to 25 parts by weight of heat expandable microcapsules and 1 to 20 parts by weight of heat expandable graphite, and 0.1 to 10 parts by weight of a polysiloxane compound having repeating units of formula (I): 1 wherein R1 independently indicates a methyl group, ethyl group or phenyl group, R2 independently indicates hydrogen or an organic group, R3 independently indicates an alkyl group or acyl group, m is 0 or an integer of 1 or more and n is an integer of 1 or more and having a number average molecular weight of 200 to 100,000.
Claims6
A rubber composition for a tire tread comprising 100 parts by weight of a diene-based rubber, 2 to 50 parts by weight of precipitated silica, 1 to 25 parts by weight of heat expandable microcapsules and 0.1 to 10 parts by weight of a polysiloxane compound having a repeating unit of formula (I):
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- wherein R1 independently indicates a methyl group, ethyl group or phenyl group, R2 independently indicates hydrogen or an organic group, R3 independently indicates an alkyl group or acyl group, m is 0 or an integer of 1 or more and n is an integer of 1 or more and having a number average molecular weight of 200 to 100,000.
A rubber composition for a tire tread comprising 100 parts by weight of a diene-based rubber, 2 to 50 parts by weight of precipitated silica, 1 to 25 parts by weight of heat expandable microcapsules, 1 to 20 parts by weight of a heat expandable graphite and 0.1 to 10 parts by weight of a polysiloxane compound having a repeating unit of formula (I):
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- wherein R1 independently indicates a methyl group, ethyl group or phenyl group, R2 independently indicates hydrogen or an organic group, R3 independently indicates an alkyl group or acyl group, m is 0 or an integer of 1 or more and n is an integer of 1 or more and having a number average molecular weight of 200 to 100,000.
Dependencies are inferred from the claim text.