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AssigneeMichelin Recherche et Technique S.A.
InventorsPierre Robert, Jean-Luc Cabioch, Jean-Michel Favrot
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The present invention relates to a vulcanizable rubber composition which can be used for the manufacture of tires, a process for the preparation of this composition and a tire, the tread of which comprises such a composition, the latter having improved hysteresis and physical properties in the vulcanized state, while retaining satisfactory processing properties. A rubber composition according to the invention comprises a reinforcing white filler, and is such that it comprises at least one diene block polymer which is intended to interact with said reinforcing white filler and which comprises on at least one of its chain ends a polysiloxane block which ends in a trialkylsilyl group, said polysiloxane block corresponding to the formula: [—SiR1R2O—]x-SiR3R4R5, in which R1, R2, R3, R4 and R5 represent alkyl groups having from 1 to 20 carbon atoms, and in which x is a natural integer other than zero.
A vulcanizable rubber composition comprising a reinforcing white filler, which can be used for the manufacture of a tire, wherein the rubber composition comprises a diene block copolymer which is intended to interact with said reinforcing white filler, said diene block copolymer comprising on at least one end thereof a polysiloxane block which ends in a trialkylsilyl group, said polysiloxane block corresponding to the formula:
A process for the preparation of a rubber composition comprising a reinforcing white filler, wherein the rubber composition comprises a diene block copolymer which is intended to interact with said reinforcing white filler, said diene block copolymer comprising on at least one end thereof a polysiloxane block which ends in a trialkylsilyl group, said polysiloxane block corresponding to the formula:
Dependencies are inferred from the claim text.