Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Michelin Recherche Et Technique

Compagnie Generale Des Establissements Michelin

Jean-Marc Marechal

Didier Vasseur

Charlotte Dire

Margarita Dorato

Nicolas Seeboth

Jean-Michel Favrot

Garance Lopitaux

Nuno Pacheco

Stéphanie De Landtsheer

Lionel Belin

Julien Cladiere

Philippe Chaboche

Florent Vaultier

Mathieu Manceau

Karim El-Othmani

Modified diene elastomer, synthesis method for same, and rubber composition comprising modified diene elastomer

The invention relates to a modified diene elastomer comprising predominantly the entity functionalized in the middle of the chain by a silanol group, the silicon atom of which bonds the two pieces of the chain, the chain ends of the modified diene elastomer being functionalized to at least 70 mol %, with respect to the number of moles of chain end, by an amine functional group.

Coupled diene elastomer having a silanol function in the middle of the chain and having an amine function at the chain end, and rubber composition comprising same

The invention relates to a modified diene elastomer comprising predominantly the entity functionalized in the middle of the chain by an alkoxysilane group, optionally partially or completely hydrolyzed to give silanol, bearing an epoxide function and the silicon atom of which bonds the two pieces of the chain, the chain ends of the modified diene elastomer being functionalized to at least 70 mol %, with respect to the number of moles of chain end, by an amine function.

Modified diene elastomer predominantly comprising a diene elastomer coupled by an alkoxysilane compound bearing an epoxide group and amine-functionalized at the end of the chain

A continuous method for synthesizing a diene elastomer includes modifying the diene elastomer in a functionalizing device by:   

Continuous synthesis method for a modified diene elastomer, facility for implementing same

The present invention relates to a modified diene elastomer predominantly comprising a species coupled via a group bearing a function comprising a silicon atom predominantly hydrolyzed into silanol and a tertiary amine function, linked to the diene elastomer via the silicon atom, and to the process for synthesizing the modified diene elastomer. This elastomer has the particular feature of not undergoing any change in Mooney viscosity during its storage.

Diene elastomer modified by coupling having silanol functions, synthesis method for same, and rubber composition comprising modified diene elastomer

The present invention relates to a specific functionalized diene elastomer. This functionalized elastomer exhibits a reduced cold flow without, however, damaging the properties of a reinforced rubber composition in which it is present, in particular the processing properties and the hysteresis properties. This functionalized diene elastomer carries, at the chain end, a silanol functional group or a polysiloxane block having a silanol end and is partially coupled by or star-branched by tin.

Functionalized diene elastomer, and rubber composition containing same

The present invention relates to a novel initiating system for the preparation of a living diene elastomer functionalized at the chain end by an amine group by anionic polymerization. The novel initiating system comprises an organolithium compound and a tin amide. The invention also relates to processes for the preparation of modified elastomers comprising an amine group at the chain end. These modified elastomers prove to be particularly advantageous in reinforced rubber compositions for tyres as they confer improved dynamic and mechanical properties in the vulcanized state.

Initiation system for the anionic polymerization of conjugated dienes, and method for preparing diene elastomers

The present invention relates to a monomodal coupled diene elastomer having a silanol functional group in the middle of the chain, to its process of preparation and to a rubber composition which can be used in particular in the manufacture of tire covers, having improved hysteresis and physical properties in the vulcanized state and an improved processing in the raw state, comprising a monomodal diene polymer having a silanol functional group in the middle of the chain and a reinforcing inorganic filler. The process for obtaining this elastomer having a silanol functional group in the middle of the chain comprises a reaction of the diene monomer(s) and of the polymerization initiator in the presence of a chelating polar agent, a reaction of the living diene polymer with a coupling agent and then, after hydrolysis, a recovery of the coupled diene polymer having a functional group in the middle of the chain. A rubber composition according to the invention comprises a reinforcing inorganic filler and this monomodal elastomer having a silanol functional group in the middle of the chain.

Monomodal coupled diene elastomer having a silanol functional group in the middle of the chain, its process of preparation and rubber composition comprising it

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Clermont-Ferrand, France

Jean-Marc Marechal