Compagnie Generale Des Etablissements Michelin

Compagnie Generale Des Etablissments Michelin

Marie-Hélène Dessendier

Charlotte Dire

Margarita Dorato

Jean Marc Marechal

Florent Vaultier

Claire Fauvarque-Nuytten

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 is provided. The elastomer comprises:

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Clermont-Ferrand, France

Marie-Hélène Dessendier