Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Compagnie Des Etablissements Michelin

Arkema France

Etienne Fleury

Jean-Michel Favrot

Sergey Ivanov

Nicolas Seeboth

Jean-Luc Couturier

Sophie Gander

Julien Thuilliez

José-Carlos Araujo Da Silva

Hichem Rehab

Garance Lopitaux

Benoît Schnell

Anne-Frédérique Salit Salit

Benoit Schnell

François Jean-Baptiste-Dit-Dominique

Jean-Denis Hidrot

Julien Cladiere

Justin Belz

Emmanuel Landreau

Perrine Vallat

Adeline Jasselin

Philippe Leduc

Oleg Ugolnikov

Catherine Mougin

Anne-Frédérique Salit

Anne-Frederique Salit

Akhilesh Garg

A process for manufacturing a rubber composition which comprises more than 50 phr of a diene elastomer rich in ethylene units, a reinforcing filler comprising a carbon black and a vulcanization system comprising sulfur, a sulfenamide as primary accelerator and a thiuram polysulfide or a mixture of a thiuram polysulfide and a guanidine as secondary accelerator is provided. The process comprises mixing the highly saturated diene elastomer, the reinforcing filler and the secondary accelerator by kneading at a temperature above 110° C., in the absence of the sulfur and the primary accelerator, and incorporating the sulfur and the primary accelerator into the rubber composition by kneading at a temperature below 110° C. The process makes it possible to reduce the hysteresis of the vulcanized rubber compositions.

Method for producing a rubber composition

A 1,3-dipolar compound including an epoxide group is provided. The epoxide group is a 3-membered ether ring in which a first member is a carbon atom having an attachment to the dipole of the 1,3-dipolar compound and a second member is a tertiary or quaternary carbon. The use of the 1,3-dipolar compound in the modification of a diene polymer makes it possible to improve the rupture properties of a rubber composition comprising the modified polymer, without the expense of its hysteresis properties, while at the same time improving its implementation.

1,3-dipolar compound comprising an epoxide group

A rubber composition is based on at least a diene elastomer, a reinforcing filler, a crosslinking system, an epoxy resin, an amine hardener comprising at least two primary amine functions, located on at least one six-membered aromatic ring, and an imidazole.

Rubber composition based on epoxy resin, an amine hardener and an imidazole

A rubber composition based on at least one diene elastomer, a reinforcing filler and a 1,3-dipolar compound comprising an epoxide group is provided. The epoxide group is a 3-membered ether ring in which a first member is a carbon atom exhibiting a connection to the dipole of the 1,3-dipolar compound and a second member is a tertiary or quaternary carbon. Such a rubber composition exhibits improved properties at break and an improved processing, as well as good hysteresis properties.

Rubber composition

A process for modifying a natural rubber is provided. The process comprises at least the following steps: A modified natural rubber capable of being obtained by the process and also rubber compositions based on the modified natural rubber is also provided.

Method for modifying a natural rubber, and modified natural rubber

A polymer comprises randomly distributed units UA, UB, UC and UD and at least one unit bearing a subunit F according to the respective molar percentages m, n, o, p and f

Polymer modified along the chain and process for the synthesis thereof

A rubber composition is based on at least one predominant elastomer comprising epoxide functional groups, silica as predominant reinforcing filler, an agent for covering the silica, and a system for crosslinking the elastomer comprising an imidazole and a polycarboxylic acid of general formula (I): and an imidazole of general formula (II): 

Rubber composition comprising an epoxide elastomer cross-linked by a polycarboxylic acid

A heavy-duty vehicle tire comprising a tread consisting of a crosslinked rubber composition comprising a reinforcing filler of siliceous type and a synthetic polyisoprene modified by grafting with a compound comprising at least one group Q, and at least one group A, which are joined to one another by at least one and preferably one 'spacer' group Sp, in which:

Heavy goods vehicle tire comprising a tread based on a modified polyisoprene, process for preparing same

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Clermont-Ferrand, France

Etienne Fleury