Compagnie Generale Des Etablissements Michelin

Centre National De La Recherche Scientifique

Universite Claude Bernard – Lyon1

Ecole Superieure De Chimie Physique Electronique De Lyon

Université Claude Bernard Lyon I

Emma Moreso

Vincent Lafaquiere

Julien Thuilliez

José-Carlos Araujo Da Silva

Christophe Boisson

Franck D'Agosto

François Jean-Baptiste-Dit-Dominique

Aurélie Triguel

Maxime Pras

Kahina Mammeri

Anne-Frédérique Salit

Nicolas Baulu

Damien Montarnal

Thomas Ferrand

A copolymer of ethylene and of a 1,3-diene of formula CH═CR—CH═CHis provided. The copolymer bears an amine function, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a copolymer improves the compromise between the content of ethylene in the polymer, its crystallinity and the stiffness of a rubber composition containing it.

Functional ethylene and 1,3-diene copolymers

A diblock polymer composed of a first block and a second block is provided. The first block is a statistical copolymer comprising units of a 1,3-diene and more than 50 mol % of ethylene units. The second block is a polyethylene with a melting point above 90° C. and a number-average molar mass greater than or equal to 2000 g/mol and less than or equal to 10 000 g/mol. Such a diblock polymer has improved rheology compared to a statistical copolymer of the same microstructure and of the same macrostructure as the first block of the diblock polymer.

Ethylene-rich diene block polymer having a random block and a polyethylene block

A terpolymer of ethylene, of a first 1,3-diene having from 4 to 6 carbon atoms and of a second 1,3-diene of formula CH═CR-CH═CHis provided. The terpolymer contains more than 50 mol % of ethylene units and at least 1 mol % of units of the second 1,3-diene, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a polymer gives an improved compromise between its ethylene content, its stiffness and its degree of crystallinity for use in tires.

Terpolymer of ethylene and 1,3-dienes

A rubber composition which comprises a reinforcing filler, a crosslinking system and more than 50 to 100 phr of an elastomer which is a copolymer of ethylene and of a 1,3-diene CH═CR—CH═CH, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. The rubber composition has a good compromise between the stiffness and hysteresis properties.

Rubber composition

A diene elastomer and a rubber composition comprising the diene elastomer is provided. The diene elastomer bears pendent imidazole functions in a molar content of at most 4% of the constituent repeating units of the diene elastomer, which diene elastomer is a copolymer of ethylene and of a 1,3-diene comprising ethylene units, the ethylene units representing at least 50 mol % of the constituent repeating units of the diene elastomer, the 1,3-diene being 1,3-butadiene or isoprene. Such an elastomer confers improved uncured properties on the rubber composition.

Functional diene elastomer and rubber composition

A copolymer of ethylene and of isoprene, which comprises from 10 to 35 mol % of isoprene units, at least 70% of which are in the 3,4 configuration and a portion of which is in the 1,2 configuration is provided. A copolymer of this type with a reduced crystallinity is synthesized with a much higher productivity than its homologues of ethylene and of butadiene, and also confers improved curing properties on rubber compositions.

Ethylene and isoprene copolymer

A terpolymer of ethylene, of 1,3-butadiene and of an aromatic α-monoolefin is provided. The terpolymer contains Such a diene terpolymer rich in ethylene units has the advantage of exhibiting a reduced, or even zero, crystallinity.

Terpolymers of ethylene, 1,3-butadiene and an aromatic a-monoolefin

A copolymer of ethylene and of a 1,3-diene of formula CH&#x2550;CR&#x2014;CH&#x2550;CHis provided. The ethylene units represent between 50 mol % and 95 mol % of the ethylene units and of the units of the 1,3-diene, and the units of the 1,3-diene of 1,2 and 3,4 configuration represent more than 50 mol % of the units of the 1,3-diene. The symbol R represents a hydrocarbon chain having from 3 to 20 carbon atoms. Such a copolymer exhibits an improved compromise between the degree of crystallinity and the stiffness and makes it possible to widen the field of application of ethylene-rich diene copolymers in rubber compositions.

Copolymer of ethylene and a 1,3-diene

A copolymer of ethylene and of myrcene, in which the ethylene units represent between 50 mol % and 95 mol % of the ethylene units and of the myrcene units, and the myrcene units of 1,2 and 3,4 configuration represent more than 50 mol % of the myrcene units, is provided. Such a copolymer exhibits an improved compromise between the degree of crystallinity and the stiffness. It therefore makes it possible to widen the field of application of ethylene-rich diene copolymers in rubber compositions, and also to increase the production capacity of a unit for the synthesis of ethylene-rich diene polymers.

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Emma Moreso