Patent ID: 7649042
Filing Date: 2010-01-19
Classification: B60C,C08C,C08K,Y02T

Abstract:
1. A cross-linkable or cross-linked rubber composition which is usable for constituting a tire tread, said composition being cross-linkable or cross-linked in the presence of a cross-linking system based on at least one compound chosen from sulphur, peroxide and bismaleimide, and being based on at least: a reinforcing inorganic filler consisting of silica, aluminum hydroxides or aluminas, a diene elastomer having a molar ratio of units originating from conjugated dienes which is greater than 30%, which is prepared in emulsion and comprises carboxylic acid functions along its chain, wherein the diene elastomer is not a nitrile rubber, a bonding agent between said reinforcing inorganic filler and said elastomer which comprises a polysulphurised alkoxysilane, and a crosslinking compound chosen from sulphur, peroxide and bismaleimide, wherein said elastomer is obtained by effecting: in an emulsifying solution, radical copolymerisation of at least one conjugated diene monomer with a precursor comonomer which is hydrolysable or oxidisable to carboxylic acid, in order to obtain an intermediate diene elastomer comprising precursor functions of said acid along its chain, then hydrolysis or oxidation of said precursor functions in order to obtain said elastomer comprising carboxylic acid functions along the chain.