Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Jean-Philippe Rasigade

Fanny Barbotin

Pierre Kiener

Rokhiyatou Said-Diatta

Leyla Pehlivan

Clotilde Canivet

A continuous method for producing a diene elastomer is provided. The method comprises a polymerization reaction of a catalytic system with at least one conjugated diene monomer to be polymerized in solution in a solvent. The catalytic system is based on at least a rare earth organic salt and an alkylating agent, in at least two full polymerization reactors in series. A portion of the conjugated diene monomer to be polymerized is introduced into a polymerization reactor subsequent to the first polymerization reactor.

Continuous method for producing a diene elastomer

The present invention relates to a process for preparing a diene elastomer. The invention especially applies to the production of a polybutadiene with a high level of cis-1,4 linkages that has at the same time a Mooney viscosity ML (1+4) greater than or equal to 40, a polydispersity index less than 2.1 and a reduced cold flow and of a polyisoprene. The process according to the invention comprises a reaction of a catalyst system with at least one conjugated diene monomer, this catalyst system being based on at least: This process comprises a separate bringing together of the monomer(s) to be polymerized with at least one alkylaluminium compound of formula AlRor HAlRwhich is identical or not to the alkylating agent of said catalyst system, said amount being chosen as a function of the characteristics of the polymerization medium and/or the polymerization conditions and/or said elastomer to be obtained.

Process for preparing a diene elastomer, such as a polybutadiene

A process is described for obtaining a 1,3-butadiene homopolymer by the reaction of a catalytic system in the presence of 1,3-butadiene and one or more monoolefin(s) with 4 carbon atoms. This catalytic system is based on at least:

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Clermont-Ferrand, France

Jean-Philippe Rasigade