Michelin Recherche Et Technique S.a.

Compagnie Generale Des Etablissements Michelin

Samuel Mathieu

Gérard Labauze

Pierre Robert

The present invention relates to a rubber composition usable for constituting a tire tread, said composition being based on at least (i) a reinforcing inorganic filler, (ii) 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, and (iii) a bonding agent between said reinforcing inorganic filler and said elastomer which consists of a polysulphurised alkoxysilane. This composition is such that said elastomer is capable of being 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.

Rubber composition for running tread and method for obtaining same

A cross-linkable or cross-linked rubber composition which is usable to constitute a tire tread having improved wear resistance, to such a tread and to a tire incorporating this tread. The rubber composition is particularly applicable to tires of passenger-vehicle type. The rubber composition includes a plasticizing resin of number-average molecular weight of from 400 to 2000 g/mol, the resin containing units resulting from the polymerization of vinylcyclohexene.

Rubber composition for a tire tread

A cross-linkable or cross-linked rubber composition usable to constitute a tire tread having improved wear resistance, to such a tread and to a tire incorporating this tread. The composition is particularly applicable to tires of passenger-vehicle type. The rubber composition includes a plasticizing resin of number-average molecular weight of from 400 to 2000 g/mol, the resin having units resulting from the polymerization of a monocyclic or bicyclic unsaturated terpene, in a mass fraction of from 70% to 100%, and having a glass transition temperature greater than 50&#xb0; C. and less than 120&#xb0; C.

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Lyons, France

Samuel Mathieu