RUBBER COMPOSITION FOR TYRES, COMPRISING A COUPLING AGENT (WHITE FILLER/ELASTOMER) WITH AN ESTER FUNCTION

摘要

The invention relates to a rubber composition with a base consisting of at least one dienic elastomer, a white filler which serves as a reinforcing filler, a coupling agent (white filler/elastomer) which can be at least bifunctionally grafted onto the elastomer with a function X, said function X consisting of an ester function of an unsaturated acid alpha - beta with a carbonyl group in position gamma , of general formula (X), wherein R, R<1> and R<2> are identical or different and each represent a monovalent hydrocarbonated radical or in the case of R<1> and R<2>, a hydrogen atom. The invention also relates to a tyre or a semi-finished product, especially a tread, for a tyre comprising a rubber composition of the inventive type.