Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Michelin Recherche Et Technique

Compagnie Generale Des Establissements Michelin

Compagnie Generale Des Etablissments Michelin

Centre National De La Recherche Scientifique

Arkema France

Université Pierre Et Marie Curie

Charlotte Dire

Nicolas Seeboth

Bernadette Charleux

Jean-Marc Marechal

Margarita Dorato

Nuno Pacheco

Nathalie Coste

Stéphanie Magnet

Benoît De-Gaudemaris

Marie-Hélène Dessendier

Jean Marc Marechal

Julien Chatard

Laurence Couvreur

Florent Vaultier

Mathieu Manceau

Kevin Roos

Claire Fauvarque-Nuytten

Gaël Courbes

Benoît Gadenne

Stéphanie Pinel

Karima Habhab

Benôit Gadenne

Pedro Maximiano-Raimundo

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 process for the continuous synthesis of a modified diene elastomer comprising at least one silicon atom directly connected to the elastomer chain is provided. The process comprises polymerization by n reactors rto rn, considered to be continuous stirred-tank reactors equipped with an internal stirring system and arranged in series, n varying from 2 to 15. The reactor ris fed by an input solution comprising a solvent, one or more monomer(s), an anionic polymerization initiator chosen from lithium amides and a polar agent. The temperature of each reactor varies from 20&#xb0; C. to 150&#xb0; C. and is greater than or equal to the temperature of the reactor which immediately precedes it. The living diene elastomer obtained exhibits a polydispersity index varying from 1.1 to 1.7. The process further comprises

Method for continuous polymerization of modified diene elastomer with lithium amide initiator

A process for the continuous synthesis of a diene elastomer is provided. The synthesis is conducted by means of n reactors r1 to rn, considered to be continuous stirred-tank reactors, which are equipped with an internal stirring system. The reactors are arranged in series, n varying from 2 to 15, preferably from 2 to 9. The reactor r1 is fed by an input solution comprising a solvent, one or more monomer(s), an anionic polymerization initiator chosen from lithium amides and a polar agent. The conversion by weight Cin the first reactor is less than 70%, and the total conversion by weight Cat the outlet of the reactor rn is greater than or equal to 70%.

Method for the continuous synthesis of a diene elastomer with lithium amide initiator

A modified diene elastomer having a good flow resistance, and imparting to a rubber composition containing the same a good compromise of hysteresis and abrasion properties and a satisfactory processing with a view to a tire application is provided. This modified elastomer comprises: a) at least 70% by weight of a linear diene elastomer predominantly functionalized in the middle of the chain by an alkoxysilane group, optionally partly or completely hydrolyzed to silanol, the alkoxysilane group optionally bearing another function capable of interacting with a reinforcing filler, the silicon atom of the alkoxysilane group lying in the main chain of the diene elastomer; b) more than 0 and up to 30% by weight of a star-branched diene elastomer, the Mooney viscosity of said modified diene elastomer varying from 50 to 80 and the glass transition temperature (Tg) thereof varying from &#x2212;100&#xb0; C. to &#x2212;80&#xb0; C.

Diene elastomer having a function in the middle of the chain and rubber composition containing the same

A modified diene elastomer is provided. The elastomer comprises:

Modified diene elastomer with reduced PDI and composition containing same

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 a tertiary amine functional group 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 functional group.

Modified diene elastomer comprising a diene elastomer coupled by an aminoalkoxysilane compound 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.

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Clermont-Ferrand, France

Charlotte Dire