Michelin Recherche Et Technique S.a.

Compagnie Generale Des Etablissements Michelin

Compagnie Generale Des Establissements Michelin

Compagnie Des Etablissements Michelin

Compagnie General Des Etablissements

Societe Detechnologie Michelin

Jean-Michel Favrot

Pierre Robert

Nicolas Seeboth

Stéphanie De Landtsheer

Jean-Luc Cabioch

Philippe Laubry

Garance Lopitaux

Philippe Chaboche

Anne Frédérique Salit

José Carlos Araujo Da Silva

Jean Marc Marechal

Nathalie Simon

Mathilde Abad

Julien Thuilliez

José-Carlos Araujo Da Silva

Fanny Barbotin

Margarita Dorato

Etienne Fleury

Jean-Marc Marechal

Pierre Lesage

Rachid Matmour

Franck Varagniat

Perrine Vallat

Corinne Fradin-Cohas

Laurent Coissieux

Anne-Frédérique Salit

Jean-Gabriel Royet

José Araujo Da Silva

Bernard Voullemier

Robert Pierre

Stėphanie De Landtsheer

Philippe Labrunie

Martine Dinh

Thierry Brunelet

Anne-Frederique Salit

José Araujo

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 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

The present invention relates to a specific functionalized diene elastomer. This functionalized elastomer exhibits a reduced cold flow without, however, damaging the properties of a reinforced rubber composition in which it is present, in particular the processing properties and the hysteresis properties. This functionalized diene elastomer carries, at the chain end, a silanol functional group or a polysiloxane block having a silanol end and is partially coupled by or star-branched by tin.

Functionalized diene elastomer, and rubber composition containing same

The invention relates to a functionalized diene elastomer composed:

Functional diene elastomer with a low pi and improved cold flow, and rubber composition containing same

The present invention relates to a modified polymer obtained by grafting a compound comprising at least one group Q, and at least one group A bonded together by at least, and preferably, one 'spacer' group Sp in which:

Graft polymer to which combined nitrogen molecules are grafted

The present invention relates to a modified polymer obtained by grafting of a compound comprising at least one group Q and at least one group A, bonded together by at least, and preferably, one 'spacer' group Sp in which:

The invention relates to a rubber composition based on at least one diene elastomer, a reinforcing filler, a chemical crosslinker and a modifier selected from compounds 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, wherein:

Rubber composition containing a modified elastomer, method for preparing same, and tire containing same

The invention relates to a tire comprising at least one rubber composition based on at least one diene elastomer, one reinforcing filler, one chemical crosslinking agent and one modifying agent, chosen from the compounds of following formula (I): 

Tire and rubber composition containing a grafted polymer

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 invention relates to a functionalized diene elastomer composed a) of a specific block copolymer functionalized, at the chain end or in the middle of the chain, by a tin functional group, b) of a specific block copolymer star-branched by tin and c) of a content of less than 15% by weight, with respect to the total weight of the functionalized diene elastomer, of a specific non-tin-functional block copolymer.

Functional diene block elastomer with a low PI and improved cold flow, and rubber composition containing same

The invention relates to a block diene elastomer corresponding to the following formula: 

Block diene elastomer for rubber compositions that can be used in pneumatic tires

A process for preparing a functionalized or unfunctionalized diene block copolymer comprising at least one polyether block of number-average molecular weight approximately fromtog/mol linked to at least one block constituted of a diene elastomer via at least one silicon atom. The process 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 diene 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 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.

The present invention relates to a monomodal coupled diene elastomer having a silanol functional group in the middle of the chain, to its process of preparation and to a rubber composition which can be used in particular in the manufacture of tire covers, having improved hysteresis and physical properties in the vulcanized state and an improved processing in the raw state, comprising a monomodal diene polymer having a silanol functional group in the middle of the chain and a reinforcing inorganic filler. The process for obtaining this elastomer having a silanol functional group in the middle of the chain comprises a reaction of the diene monomer(s) and of the polymerization initiator in the presence of a chelating polar agent, a reaction of the living diene polymer with a coupling agent and then, after hydrolysis, a recovery of the coupled diene polymer having a functional group in the middle of the chain. A rubber composition according to the invention comprises a reinforcing inorganic filler and this monomodal elastomer having a silanol functional group in the middle of the chain.

Monomodal coupled diene elastomer having a silanol functional group in the middle of the chain, its process of preparation and rubber composition comprising it

Plasticizing system which can be used for the plasticizing of a diene rubber composition, wherein it is based on an MES or TDAE oil and on a resin formed of terpene/vinylaromatic copolymer, in particular copolymer of limonene and of stirene. Rubber composition exhibiting an improved abrasion and cut resistance, the composition being based on at least a diene elastomer, a reinforcing filler, a crosslinking system and a plasticizing system comprising between 5 and 35 phr of an MES or TDAE oil and between 5 and 35 phr of such a resin formed of terpene/vinylaromatic copolymer (pce=parts by weight per hundred parts of elastomer). Process for preparing such a composition, use of the composition for the manufacture of a finished article or of a semi-finished product intended for a tire or a tire/motor vehicle connecting system, in particular a tire tread.

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Clermont-Ferrand, France

Jean-Michel Favrot