ZINC-FREE OR PRACTICALLY ZINC-FREE RUBBER COMPOSITION

摘要

The invention concerns a composition free or practically free of zinc or zinc derivative, useful in particular for making tyres or tyre running treads, comprising at least: one diene elastomer; one inorganic filler as reinforcing filler; optionally carbon black, at a rate less 5 than parts by weight per 100 parts of elastomer; a silane-polysulfide of formula (I), wherein: the symbols R1 and R2, identical or different, represent each a monovalent hydrocarbon group selected among alkyls, linear or branched, having 1 to 6 carbon atoms and the phenyl radical; the symbols R3, identical or different, represent each hydrogen or a monovalent hydrocarbon group selected among alkyls, linear or branched, having 1 to 4 carbon atoms and alkoxyalkyls, linear or branched, having 2 to 8 carbon atoms; the symbols Z, identical or different, are divalent binding groups comprising 1 to 18 carbon atoms; x is an integer or fraction not less than 2.