Michelin Recherche Et Technique S.a.

Compagnie Generale Des Etablissements Michelin

Compagnie Generale Des Etablissements

Arkema France

Societe Detechnologie Michelin

Fanny Barbotin

Jean-Michel Favrot

Roger Spitz

Pierre Robert

Philippe Laubry

Philippe Chaboche

Jean-Philippe Rasigade

Cristophe Boisson

Nicolas Seeboth

Christophe Boisson

Jean-Luc Cabioch

Philippe Johnson

Stéphanie De Landtsheer

Marc Greiveldinger

Pierre Kiener

Bernard Anselme

Helene Parola

Clotilde Canivet

Fabrice Martinet

Philppe Laubry

Jean-Luc Auger

Gérard Pouzet

Hélène Parola

The present invention relates to an elastomer mixture resulting from the modification of a diene elastomer by a coupling agent that introduces, into the elastomer chain, an alkoxysilane group bearing a tertiary or secondary amine functional group. This mixture predominantly comprises the diene elastomer coupled by the alkoxysilane group bearing a tertiary or secondary amine functional group which is bonded to the diene elastomer through the silicon atom. The invention also relates to a reinforced rubber composition, in particular that can be used for the manufacture of tires, which comprises a reinforcing filler and an elastomer matrix comprising at least this elastomer mixture, and to its preparation process. This composition has improved hysteresis and mechanical properties in the vulcanized state, and also improved processing in the uncured state.

Elastomer mixture mainly comprising a diene elastomer coupled by an aminoalkoxysilane group, rubber composition including the same and methods for obtaining same

The present invention relates to a process for the continuous preparation of a catalytic system that can be used for the polymerization of at least one conjugated diene monomer, said catalytic system being based on at least:

Method for the continuous preparation of a catalytic system that is used to polymerize a conjugated diene and installation for implementing same

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 for preparing, in one step, a diene block copolymer, of which at least one of these blocks is constituted of a polyether, the number-average molecular weight of which is approximately from 100 to 5000 g/mol, and at least one other of these blocks is constituted of a diene elastomer. The process according to the invention allows a high degree of grafting of the polyether to the polymer chains. Also disclosed is a reinforced rubber composition, especially intended for the manufacture of tires, comprising such a block copolymer which is intended to interact with the reinforcing filler. Such a rubber composition has improved hysteresis properties in the vulcanized state, while retaining satisfactory processing properties in the non-vulcanized state.

Process for preparing a diene copolymer comprising a polyether block, diene copolymer comprising a polyether block, reinforced rubber composition and tire

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:

Process for obtaining a butadiene homopolymer in the presence of monoolefin(s) with 4 carbon atoms

The present invention relates to a cross-linkable or cross-linked rubber composition having improved hysteresis properties in the cross-linked state which is useful for the manufacture of treads for tires. The rubber composition of the present invention comprises at least one diene elastomer having a molar ratio of units originating from conjugated dienes which is greater than 30% and comprising carboxylic acid functions along its chain, and a reinforcing inorganic filler. The present invention further relates to a process for preparing such a cross-linkable or cross-linked rubber composition as well as to a tire having reduced rolling resistance and a tread for a tire where the tread comprises the rubber composition of the present invention.

Composition for a tire tread and process for its preparation

Branched synthetic polyisoprenes are described having a macrostructure and a microstructure very similar to those of natural rubber. According to one aspect, these polyisoprenes have an apparent stress F/Sgreater than or equal to 0.4 MPa at a relative elongation &#x3b1; of 150%, applied to a dumbbell-shaped test specimen consisting of the crosslinkable polyisoprene. According to another aspect, these polyisoprenes fulfill the relationship:Cotan &#x3b4;&#x2267;0.3761. &#x3b7;+0.15,:&#x2003;&#x2003;(i)

Synthetic branched polyisoprenes and process for obtaining them

The present invention relates to a catalytic system usable for the preparation of polybutadienes by polymerisation, to a process for the preparation of said catalytic system and to a process for the preparation of polybutadienes by means of this catalytic system. A catalytic system according to the invention is based on at least:

Catalytic system for the preparation of polybutadienes and preparation process

The present invention relates to a solid supported catalyst usable for the polymerization of conjugated dienes, to a process for the preparation of said catalyst and to a process for the polymerization of conjugated dienes using said catalyst. The solid supported catalyst according to the invention comprises the reaction product of

Solid supported catalyst usable for the polymerization of conjugated dienes, process for the preparation thereof and a process for the polymerization of conjugated dienes using this catalyst

Catalytic system, its method for preparation and method for preparation of a copolymer of ethylene and a conjugated diene

Catalytic system, its method for preparation, and method for preparation of a copolymer of ethylene and a conjugated diene

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Clermont-Ferrand, France

Fanny Barbotin