Compagnie Generale Des Etablissements Michelin

Gilles Mioche

Frédéric Pialot

Philippe Dubois

Arnaud Letocart

Miguel Torres-Castellano

Nathalie Coste

Severin Dronet

Gérard Crosnier

Christophe Hombert

Séverin Dronet

Maxime Pras

Julien Cayuela

Lise Maisonneuve

Leila Bonnaud

Bertrand De Backer

Bernard Cappa

Eddy Ferjoux

Nicolas Lechevalier

Christophe Chouzenoux

Jean-Luc Veronnet

Philippe Ghislain Dubois

Benoît Schnell

An elastomeric mixture comprises at least: one diene elastomer/polylactide copolymer A1 comprising a polylactide block PLLA or PDLA, where appropriate one or more other polylactide blocks which are all PLLA when the first block is PLLA or which are all PDLA when the first block is PDLA, the mass percentage of the polylactide block(s) being between 10% and 50% by weight relative to the weight of the copolymer A1, and a diene elastomer/polylactide copolymer B1 the mass percentage of the polylactide block(s) in said copolymer B1 being between 10% and 50% by weight relative to the weight of the copolymer B1, or a polylactide B2, or a mixture of said copolymer B1 and of said polylactide B2, the names PLLA and PDLA denoting a chain consisting of units of formula (I) —[CH(CH)—C(O)—O]— (I), of which at least 70% by weight are, respectively, of L and D configuration.

Elastomer mix comprising PLLA and PDLA

A system () for butt-joining two or more rubber strips (B, B) selected in accordance with a predetermined rubber mixture recipe in order to feed at least one extruder with a complex strip of rubber material (B) made from the butt joined rubber strips is disclosed. The system includes at least one conveyor that transports the rubber strips from an inlet () of the system to an outlet () of the butt-joining system; a frame () that operationally supports the conveyor to allow the continuous transport of the rubber strips and also to allow the simultaneous butt-joining of the rubber strips fed to the system; and a roller system () that butt-joins the rubber strips without penetration. The invention also relates to a process for butt-joining rubber strips that is performed by the system.

System for joining ends of rubber strips to supply an extruder

The present invention relates to a process for preparing a diene elastomer/polylactide copolymer, the weight percentage of polylactide being between 10% and 45% by weight, relative to the weight of the copolymer, characterized in that lactide, an elastomer functionalized by at least one group bearing at least one function capable of initiating a ring-opening polymerization of the lactide and a catalytic system are introduced into an extruder (A).

Process for preparing polydiene/polylactide copolymers by reactive extrusion

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Clermont-Ferrand, France

Gilles Mioche