| abstract |
The invention relates to 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, characterized in that the coupling agent is an azosilane compound of following formula (I): n (G 1 ) 3-a (G 2 ) a Si—Z—NH—C(O)—N═N—C(O)—NH—Z—Si(G 1 ) 3-a (G 2 ) a (I)n n in which:n G 1 , identical to or different from one another, each represent a monovalent hydrocarbon-based 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, G 2 , identical to or different from one another, each represent a hydroxyl group or a monovalent group in the form (G 3 ) n -OG 1 in which G 3 is a divalent linking group having from 1 to 18 carbon atoms and comprising one or more heteroatoms chosen from O, S, Si and N, n being a number equal to or higher than 0 and less than or equal to 18, Z represents a divalent linking group having from 1 to 18 carbon atoms, a is equal to 1, 2 or 3. |