Rubber tire composition comprising an azo-silane coupling agent

Abstract

A tire rubber composition based on at least one diene elastomer, an inorganic filler as reinforcing filler, a coupling agent providing the bonding between the inorganic filler and the diene elastomer, wherein the coupling agent is an azosilane compound of formula (I): (G1)3-a(G2)aSi—Z—NH—C(O)—N═N—C(O)—NH—Z—Si(G1)3-a(G2)a (I) wherein: G1, identical to or different, each represent a monovalent hydrocarbon group chosen from branched or unbranched, substituted or unsubstituted alkyls having from 1 to 18 carbon atoms, substituted or unsubstituted cycloalkyls or aryls having from 5 to 18 carbon atoms, G2, identical to or different, each represent a hydroxyl group or a monovalent group chosen from branched or unbranched, substituted or unsubstituted alkoxyls having from 1 to 18 carbon atoms, substituted or unsubstituted cycloalkoxyls having from 5 to 18 carbon atoms, Z represents a divalent linking group having from 1 to 18 carbon atoms, a is equal to 1, 2 or 3.

Dependencies are inferred from the claim text.