Patent ID: 7078449

Claim:
A tire comprising a rubber composition, wherein said rubber composition is based on a diene elastomer, a reinforcing white filler, and a (white filler/elastomer) coupling agent, bearing functions denoted as “Y” and “X”, wherein said coupling agent can be bonded on the one hand to said reinforcing white filler by means of the Y function and on the other hand to said diene elastomer by means of the X function, and wherein the X function is an ester function of an unsaturated α-β acid bearing a carbonyl group on its γ position and having the general formula (X): wherein R, R 1 and R 2 may be the same or different, wherein R represents a monovalent hydrocarbon radical, and wherein R 1 and R 2 each represent either a monovalent hydrocarbon radical or a hydrogen atom.