Patents by Inventor Jean-Michel Favrot
Jean-Michel Favrot has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20130131279Abstract: 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: Q comprises a dipole containing at least, and preferably, one nitrogen atom, capable of being grafted onto the polymer chain by [1,3]-dipolar cycloaddition, A comprises an associative group comprising at least one nitrogen atom, Sp is an atom or a group of atoms forming a bond between Q and A.Type: ApplicationFiled: July 12, 2011Publication date: May 23, 2013Applicants: Mchelin Recherche et Technique S.A., COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: José Araujo Da Silva, Jean-Michel Favrot, Anne Frédérique Salit, Nicolas Seeboth
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Publication number: 20130123418Abstract: 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: Q comprises a dipole containing at least one and preferably one nitrogen atom, A comprises an associative group comprising at least one nitrogen atom, Sp is an atom or group of atoms forming a bond between Q and A. This composition has an improved balance between stiffness under moderate deformations/elongation at break and improved hysteresis properties and is therefore especially suited to the manufacture of tyres for enhancing the trade off between rolling resistance and resistance to large deformations.Type: ApplicationFiled: July 12, 2011Publication date: May 16, 2013Applicants: Michelin Recherche et Technique S.A., Compagnie Generale des Etablissements MichelinInventors: José Araujo Da silva, Jean-Michel Favrot, Anne Frédérique Salit, Nicolas Seeboth
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Publication number: 20130012652Abstract: 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): where R denotes a unit comprising at least one reactive group, R1 denotes hydrogen, R2 denotes an alkylene radical comprising from 2 to 8 carbon atoms and optionally one or more heteroatoms chosen from S, N, O or Si, A denotes an oxygen or sulphur atom or an ?NH group, preferably an oxygen atom.Type: ApplicationFiled: March 15, 2011Publication date: January 10, 2013Applicants: Michelin Recherche et Technique S.A., COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: José Carlos Araujo Da Silva, Jean-Michel Favrot, Rachid Matmour, Anne Frédérique Salit, Nicolas Seeboth
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Patent number: 8344063Abstract: 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.Type: GrantFiled: April 15, 2008Date of Patent: January 1, 2013Assignees: Michelin Recherche Et Technique S.A., Compahnie Generale des Establissements MichelinInventors: Jean-Marc Marechal, Philippe Chaboche, Jean-Michel Favrot
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Patent number: 8324310Abstract: 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.Type: GrantFiled: July 18, 2006Date of Patent: December 4, 2012Assignee: Michelin Recherche et Technique S.A.Inventors: Pierre Robert, Stéphanie De Landtsheer, Jean-Michel Favrot, Garance Lopitaux
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Publication number: 20120252928Abstract: 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.Type: ApplicationFiled: October 7, 2010Publication date: October 4, 2012Applicants: MICHELIN RECHERCHE ET TECHNIQUE, SOCIETE DE TECHNOLOGIE MICHELINInventors: Jean-Marc Marechal, Stéphanie De Landtsheer, Jean-Michel Favrot
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Publication number: 20110178233Abstract: 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 tyres, 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.Type: ApplicationFiled: April 27, 2009Publication date: July 21, 2011Applicants: Societe De Technologie Michelin, Michelin Recherche et Technique S.A.Inventors: Philippe Chaboche, Jean-Michel Favrot, Nicolas Seeboth, Fanny Barbotin, Stéphanie De Landtsheer
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Patent number: 7882874Abstract: A plasticizing system used for plasticizing a diene rubber composition is based on an MES or TDAE oil and on C5 fraction/vinylaromatic copolymer resin, in particular a copolymer of a C5 fraction and of styrene resin. A rubber composition exhibiting an improved abrasion and cut resistance is 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. A tire is formed of the above mentioned rubber composition. A process for preparing such a composition, use of said composition for the manufacture of a finished article or of a semi-finished product intended for a motor vehicle ground-contact system, in particular a tire and a tread of such a tire.Type: GrantFiled: April 22, 2010Date of Patent: February 8, 2011Assignee: Michelin Recherche et Technique S.A.Inventors: Pierre Robert, Stéphanie De Landtsheer, Jean-Michel Favrot, Garance Lopitaux
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Patent number: 7834074Abstract: Plasticizing system usable for the plasticizing of a diene rubber composition. The plasticizing system is based on an MES or TDAE oil and a polylimonene resin. The rubber composition has an improved resistance to abrasion and to cuts, said composition being based on at least a diene elastomer, a reinforcing filler, a cross-linking system and a plasticizing system comprising between 5 and 35 phr of an MES or TDAE oil, and between 5 and 35 phr of a polylimonene resin (phr=parts by weight per hundred of elastomer). Advantageously, this plasticizing system furthermore comprises an unsaturated (C12-C22) fatty acid triester of glycerol, preferably a glycerol trioleate. A process is disclosed for preparing such a composition. The composition can be used for the manufacture of a finished article or a semi-finished product intended for a suspension system of a motor vehicle, in particular a tire or a tread of such a tire.Type: GrantFiled: February 10, 2005Date of Patent: November 16, 2010Assignee: Michelin Recherche et Technique S.A.Inventors: Thierry Brunelet, Martine Dinh, Jean-Michel Favrot, Philippe Labrunie, Garance Lopitaux, Jean-Gabriel Royet
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Patent number: 7825183Abstract: Plasticising system which can be used for the plasticizing of a diene rubber composition, characterized in that it is based on an MES or TDAE oil and on C5 fraction/vinylaromatic copolymer resin, in particular a copolymer of a C5 fraction and of stirene resin. Rubber composition exhibiting an improved abrasion and cut resistance, said composition being based on at least a diene elastomer, a reinforcing filler, a crosslinking system and a plasticising system comprising between 5 and 35 phr of an MES or TDAE oil and between 5 and 35 phr of such a resin (phr=parts by weight per 100 parts of elastomer). Process for preparing such a composition, use of said composition for the manufacture of a finished article or of a semi-finished product intended for a motor vehicle ground-contact system, in particular a tire and a tread of such a tire.Type: GrantFiled: October 28, 2005Date of Patent: November 2, 2010Assignee: Michelin Recherche et Technique S.A.Inventors: Pierre Robert, Stėphanie De Landtsheer, Jean-Michel Favrot, Garance Lopitaux
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Publication number: 20100252156Abstract: 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.Type: ApplicationFiled: June 19, 2008Publication date: October 7, 2010Applicants: SOCIETE DE TECHNOLOGIE MICHELIN, Michelin Recherche et Technique S.A.Inventors: Pierre Robert, Fanny Barbotin, Jean-Michel Favrot, Philippe Chaboche
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Publication number: 20100249270Abstract: A process for preparing a functionalized or unfunctionalized diene block copolymer comprising at least one polyether block of number-average molecular weight approximately from 150 to 5000 g/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.Type: ApplicationFiled: June 19, 2008Publication date: September 30, 2010Applicants: Societe De Technologie Michelin, Michelin Recherche et Technique S.A.Inventors: Pierre Robert, Nicolas Seeboth, Jean-Michel Favrot, Philippe Chaboche
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Publication number: 20100204359Abstract: A plasticising system used for plasticizing a diene rubber composition is based on an MES or TDAE oil and on C5 fraction/vinylaromatic copolymer resin, in particular a copolymer of a C5 fraction and of styrene resin. A rubber composition exhibiting an improved abrasion and cut resistance is based on at least a diene elastomer, a reinforcing filler, a crosslinking system, and a plasticising system comprising between 5 and 35 phr of an MES or TDAE oil and between 5 and 35 phr of such a resin. A tire is formed of the above mentioned rubber composition. A process for preparing such a composition, use of said composition for the manufacture of a finished article or of a semi-finished product intended for a motor vehicle ground-contact system, in particular a tire and a tread of such a tire.Type: ApplicationFiled: April 22, 2010Publication date: August 12, 2010Applicant: Michelin Recherche et Technique S.A.Inventors: Pierre ROBERT, Stéphanie De Landtsheer, Jean-Michel Favrot, Garance Lopitaux
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Publication number: 20100184912Abstract: 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 tyre 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.Type: ApplicationFiled: April 15, 2008Publication date: July 22, 2010Inventors: Jean-Marc Marechal, Philippe Chaboche, Jean-Michel Favrot
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Publication number: 20090292063Abstract: 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.Type: ApplicationFiled: July 18, 2006Publication date: November 26, 2009Applicant: MICHELIN RECHERCHE ET TECHNQUES S.A.Inventors: Pierre Robert, Stéphanie De Landtsheer, Jean-Michel Favrot, Garance Lopitaux
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Patent number: 7470743Abstract: A crosslinkable or crosslinked rubber composition is described which includes a diene elastomer having a mass content of cyclic vinyl units of greater than 15%, and which may be used to form a tire tread. Also described is a tire tread and a tire incorporating the tread. The composition contains a linear or branched diene elastomer derived from at least one conjugated diene, and a reinforcing filler. The elastomer has cyclic vinyl units according to a mass content of greater than or equal to 15% and a number-average molecular weight of from 30,000 to 350,000 g/mol. The elastomer may be obtained by anionic polymerization of one or more monomers including a conjugated diene in an inert hydrocarbon solvent with a catalytic system including an organolithium initiator and a polar agent with several heteroatoms. The reaction may be performed batchwise where the polar agent:initiator molar ratio is greater than 8, or continuously where the polar agent:initiator molar ratio is greater than or equal to 3.Type: GrantFiled: July 19, 2005Date of Patent: December 30, 2008Assignee: Michelin Recherche et Technique S.A.Inventors: Jean-Luc Cabioch, Laurent Coissieux, Jean-Michel Favrot, Franck Varagniat
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Publication number: 20080275159Abstract: A crosslinkable or crosslinked rubber composition is described which includes a diene elastomer having a mass content of cyclic vinyl units of greater than 15%, and which may be used to form a tire tread. Also described is a tire tread and a tire incorporating the tread. The composition contains a linear or branched diene elastomer derived from at least one conjugated diene, and a reinforcing filler. The elastomer has cyclic vinyl units according to a mass content of greater than or equal to 15% and a number-average molecular weight of from 30,000 to 350,000 g/mol. The elastomer may be obtained by anionic polymerization of one or more monomers including a conjugated diene in an inert hydrocarbon solvent with a catalytic system including an organolithium initiator and a polar agent with several heteroatoms. The reaction may be performed batchwise where the polar agent:initiator molar ratio is greater than 8, or continuously where the polar agent:initiator molar ratio is greater than or equal to 3.Type: ApplicationFiled: July 7, 2008Publication date: November 6, 2008Applicant: MICHELIN RECHERCHE ET TECHNIQUE S.A.Inventors: Jean-Luc Cabioch, Laurent Coissieux, Jean-Michel Favrot, Franck Varagniat
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Publication number: 20080275160Abstract: A crosslinkable or crosslinked rubber composition is described which includes a diene elastomer having a mass content of cyclic vinyl units of greater than 15%, and which may be used to form a tire tread. Also described is a tire tread and a tire incorporating the tread. The composition contains a linear or branched diene elastomer derived from at least one conjugated diene, and a reinforcing filler. The elastomer has cyclic vinyl units according to a mass content of greater than or equal to 15% and a number-average molecular weight of from 30,000 to 350,000 g/mol. The elastomer may be obtained by anionic polymerization of one or more monomers including a conjugated diene in an inert hydrocarbon solvent with a catalytic system including an organolithium initiator and a polar agent with several heteroatoms. The reaction may be performed batchwise where the polar agent:initiator molar ratio is greater than 8, or continuously where the polar agent:initiator molar ratio is greater than or equal to 3.Type: ApplicationFiled: July 7, 2008Publication date: November 6, 2008Applicant: MICHELIN RECHERCHE ET TECHNIQUE S.A.Inventors: Jean-Luc Cabioch, Laurent Coissieux, Jean-Michel Favrot, Franck Varagniat
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Patent number: 7396870Abstract: 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.Type: GrantFiled: June 2, 2004Date of Patent: July 8, 2008Assignee: Michelin Recherche Et Technique S.A.Inventors: Pierre Robert, Jean-Michel Favrot, Philippe Laubry, Fanny Barbotin
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Publication number: 20080156404Abstract: The inventive plasticising system is used for plasticising a dienic rubber compound is characterised in that it is based on a MES or TDAE oil and a polylimonene resin. Said rubber compound exhibits an improved abrasion and cut resistance and is based on at least one type of dienic elastomer, a reinforcing filler, a cross-linking system and a plasticising system comprising from 5 to 35 to 35 pce of the MES or TDAE oil and from 5 to 35 to 35 pce of polylimonene resin (pce=parts by weight percent elastomer). Advantageously, said plasticising system also comprises a glycerol unsaturated fatty acid triester (C12-C22), preferably a glycerol trifoliate. The inventive method for producing said compound, using the compound for producing a final or semi-final product for the gripping system of a motor vehicle with ground, in particular the tire or the thread thereof are also disclosed.Type: ApplicationFiled: February 10, 2005Publication date: July 3, 2008Applicant: Michelin Recherche et Technique S.A.Inventors: Thierry Brunelet, Martine Dinh, Jean-Michel Favrot, Philippe Labrunie, Garance Lopitaux, Jean-Gabriel Royet