RUBBER COMPOSITION FOR A TYRE, COMPRISING A COUPLING AGENT (WHITE FILLER/DIENIC ELASTOMER) ACTIVATED BY A HEAT-INITIATED RADICAL STARTER

摘要

The invention relates to a sulphur-vulcanisable rubber composition which can be used for producing tyres and which is based on at least: (A) a dienic elastomer chosen from the group consisting of polybutadienes, natural rubber, synthesis polyisoprenes, butadiene copolymers, isoprene copolymers and mixtures of these elastomers (component A); (B) a reinforcing white filler (component B); (C) a coupling agent (white filler/dienic elastomer) with at least one activated ethylenic double bond (component C), combined with: (D) between 0.05 and 1 pce (parts by weight per cent elastomer) of a heat-initiated radical starter (component D). The coupling agent is especially an alkoxysilane from the group of alkoxy(C1-C4)-silylpropyls, especially a trialkoxy(C1-C4)-silylpropyl methacrylate, particularly trimethoxy-silylpropyl methacrylate. The invention also relates to a method for producing a rubber composition of this type and to a tyre or a semi-finished product, especially for a tread, for a tyre comprising the inventive composition.