Patent ID: 8492475

Claim:
A tire comprising a rubber composition based on at least one isoprene elastomer, an inorganic filler as reinforcing filler and a polyfunctional organosiloxane coupling agent which provides the bonding between the said reinforcing inorganic filler and the isoprene elastomer, wherein the organosiloxane corresponds to the formula (VII): [(G 0 ) 3 SiO 1/2 ] m [(G 0 ) 2 SiO 2/2 ] n [G 0 SiO 3/2 ] o [SiO 4/2 ] p [(G 2 ) b′ (G 1 ) a′ (A-CO—N═N—CO—Z)SiO (3-a′-b′)/2 ] q in which: Z is a divalent bonding group connecting the azodicarbonyl functional group to a silicon atom of the organosiloxane; A represents (i) a monovalent radical which can be unsubstituted or substituted hydrocarbon or a monovalent residue selected from the group consisting of —OR′, —NR′, and —SR′, wherein R′ is a monovalent hydrocarbon radical, or (ii) the group of formula Z′ in which Z′, which is identical to or different from Z, and is a divalent bonding group which makes it possible to connect the azodicarbonyl functional group to a silicon atom (identical to or different from the Si atom connected to Z) of the organosiloxane; A, Z and if applicable Z′, independently, may comprise one or more heteroatoms; a′ represents an integer chosen from 0, 1 and 2; b′ represents an integer chosen from 0, 1 and 2; the sum a′+b′ is equal to 1 or 2 with the condition according to which, when b′=0, then at least one of the G 0 symbols corresponds to the definition of G 2 ; m lies within the range from 1 to 2; n=o=p=0 (zero) and q=1; the G 0 symbols, which are identical or different, each represent one of the groups corresponding to G 2 or G 1 the G 1 radicals, which are identical or different if several are present, represent a monovalent hydrocarbon radical; the G 2 radicals, which are identical or different if several are present, represent a hydroxyl or hydrolysable group.