Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Gael Courbes

Benoit De Gaudemaris

Rokhiyatou Said-Diatta

Florent Vaultier

A process for preparing a functionalized polybutadiene is provided. The process comprises the following steps: The total molar amount of aluminium in the polymerization medium is such that the (aluminium/rare earth salt) molar ratio has a value between 1 and 5 and the polymerization is carried out at a temperature between 40&#xb0; C. and 90&#xb0; C. A functionalized polybutadiene that can be obtained by the process, and a rubber composition containing the functionalized polybutadiene is also provided.

Functionalised polybutadiene synthesis process

A multicomponent preformed catalytic system based at least: This catalytic system comprises the rare earth metal in a concentration greater than or equal to 0.005 mol/l. The catalytic system makes possible polymerizing isoprene, with a good catalytic activity, in solution in a volatile hydrocarbon solvent while benefiting from the economic advantage linked to a volatile solvent process, which is also a subject of the invention. The diene elastomers obtained have a high content of cis-1,4 linkages.

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Clermont-Ferrand, France

Gael Courbes