Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Ifp Energies Nouvelles

Michelin Recherche Et Technique

Compagnie Generale Des Establissements Michelin

Margarita Dorato

Nuno Pacheco

Charlotte Dire

Marc Jacquin

Jean-Marc Marechal

Jean Marc Marechal

Jean-Michel Favrot

Claire Rannoux

Stéphanie De Landtsheer

Pierre Kiener

Nathalie Simon

Mathieu Manceau

Mathilde Abad

Lionel Flesinski

Romain Richard

Damien Leinekugel Le Cocq

Rejane Dastillung

Sophie Couderc

Florent Vaultier

Marie-Hélène Dessendier

A process for the continuous synthesis of a diene elastomer by n reactors r1 to rn, n ranging from 2 to 15, is provided. The reactor r1 is fed by an input solution comprising a solvent, one or more monomers, an anionic polymerization initiator and a polar agent, one or more of the reactor(s) r2 to rn also being fed by reinjection of a purified solution comprising solvent and/or monomer(s), the purity of the or of each reinjected solution being such that the proportion of the number of dead chains in the output stream from the reactor rn is less than 30%, of the number of living chains initiated in the reactor r1, the temperature of each reactor ranging from 20 to 150&#xb0; C. and being greater than or equal to the temperature of the reactor which immediately precedes it, the diene elastomer having a polydispersity index of 1.1 to 2.

Process for the continuous polymerization of a diene elastomer

The invention relates to a method for producing 1,3-butanediene from a butanediol feedstock that includes:

Method for producing butadiene from butanediols

A modified diene elastomer is provided. The elastomer comprises:

Modified diene elastomer with reduced PDI and composition containing same

A process for the continuous synthesis of a modified diene elastomer includes:

Process for the continuous synthesis of a modified diene elastomer

The invention relates to a conversion method that is fed with a diol feedstock that comprises at least 90% by weight of diol and a carboxylic acid feedstock that comprises at least 80% by weight of carboxylic acid. The method comprising at least:

Method for esterification of a diol using a reactive distillation

A method for producing 1,3-butadiene from a 1,4-butanediol feedstock:

Method for producing 1,3-butadiene from 1,4-butanediol

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

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 invention relates to a functionalized diene elastomer composed:

Functional diene elastomer with a low pi and improved cold flow, and rubber composition containing same

Process for the recovery of diene or vinylaromatic monomers from a gas stream, including bringing the gas stream into contact, in an extraction column (C), with an organic extraction solvent, which absorbs the monomer, and stripping or desorption with an inert gas in (C), by feeding, at the bottom of (C) below the feeding of the monomers, a stream of inert gas, a liquid stream having the extraction solvent and the monomer recovered at the bottom of (C) and an exiting gas stream recovered at the top of (C), then within a second recovery column Crecovery of the monomer, wherein the monomer is separated from the extraction solvent by distillation fed with the liquid stream recovered at the bottom of (C), a stream comprising concentrated monomer(s) recovered at the top of (C) and a liquid stream having the extraction solvent recovered at the bottom of (C) and then recycled to the top of (C), the monomer or monomers being dienes, vinylaromatic compounds, or isobutene.

Recovery of monomers

The invention relates to a functionalized diene elastomer composed a) of a specific block copolymer functionalized, at the chain end or in the middle of the chain, by a tin functional group, b) of a specific block copolymer star-branched by tin and c) of a content of less than 15% by weight, with respect to the total weight of the functionalized diene elastomer, of a specific non-tin-functional block copolymer.

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Clermont-Ferrand, France

Margarita Dorato