Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Julien Chatard

Charlotte Dire

Benoît De-Gaudemaris

Kevin Roos

Nicolas Seeboth

Benoit De Gaudemaris

Rachid Matmour

Alain Hut

Fabien Hellot

Benoît Gadenne

Benôit Gadenne

A rubber composition based at least on a reinforcing filler comprising a content of silica of greater than or equal to 80 phr and on an elastomer matrix comprising a content of a modified diene elastomer of greater than or equal to 75 phr is provided. The modified diene elastomer includes macromolecules comprising, within their structure, a linear or branched polyether block comprising, at each of the two ends of the block, a branch point to which up to three diene elastomer branches and up to three —OR groups are bonded, R representing, independently of one another, a C-Calkyl substituent or a hydrogen atom b—the. The copolymer is composed:

Rubber composition based on a modified diene elastomer

A rubber composition based at least on a reinforcing filler comprising a content of silica of greater than or equal to 80 phr, preferably of greater than or equal to 100 phr, and on an elastomer matrix comprising a content of a modified diene elastomer of greater than or equal to 75 phr is provided. The modified diene elastomer comprises macromolecules comprising, within their structure, an n-functional branching unit, n having a value of at least 1 and of at most 9, preferably of at most 6, consisting of a group comprising at least two silicon atoms which are substituted by elastomer branches and connected together via a group comprising at least one nitrogen atom, the bonds between silicon and nitrogen atoms being produced via a spacer group.

A rubber composition is based on at least one diene elastomer, a reinforcing filler, a crosslinking system and a hydrocarbon-based resin. The hydrocarbon-based resin has a number-average molecular weight (Mn) of between 700 and 1000 g/mol, an average molecular weight Mz of greater than 6000 g/mol and a polydispersity index (PI) of greater than 2.4.

Rubber composition comprising a specific hydrocarbonated resin

The present invention relates to a process for the preparation of a random copolymer based on diene monomers and on cyclic carbosilane monomers. This process is characterized in that it comprises a stage of copolymerization, in the presence of an anionic initiator in a reaction medium comprising a polar solvent, of at least one diene monomer and of a cyclic carbosilane monomer corresponding to the Formula I: 

Method for preparing a statistical copolymer based on diene monomers and cyclic carbosilane monomers

Growing community of inventors

Clermont-Ferrand, France

Julien Chatard