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).

  • Publication number: 20080009564
    Abstract: 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: Application
    Filed: October 28, 2005
    Publication date: January 10, 2008
    Inventors: Pierre Robert, Stephanie De Landtsheer, Jean-Michel Favrot, Garance Lopitaux
  • Patent number: 7205360
    Abstract: A preparation process for a copolymer having two blocks usable in a sulphur-cross-linkable rubber composition of reduced hysteresis in the cross-linked state, such a block copolymer in which one of the blocks is a polyisoprene and the other a diene elastomer other than a polyisoprene, and this rubber composition for tire treads. A process for the preparation of this copolymer involves copolymerizing one or more monomers including a conjugated diene other than isoprene using a catalytic system including at least one hydrocarbon solvent, a compound A of a metal of group IIIA, a compound B of an alkaline-earth metal and a polymeric initiator C having a C—Li bond which is constituted of a monolithiated polyisoprene intended to form the polyisoprene block, the number-average molecular weight Mn1 of the polyisoprene block being between 2,500 and 20,000 g/mol.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: April 17, 2007
    Assignee: Michelin Recherche et Technique S.A.
    Inventors: Pierre Robert, Jean-Michel Favrot, Pierre Lesage
  • Patent number: 7026387
    Abstract: The present invention relates to a vulcanizable rubber composition which can be used for the manufacture of tires, a process for the preparation of this composition and a tire, the tread of which comprises such a composition, the latter having improved hysteresis and physical properties in the vulcanized state, while retaining satisfactory processing properties. A rubber composition according to the invention comprises a reinforcing white filler, and is such that it comprises at least one diene block polymer which is intended to interact with said reinforcing white filler and which comprises on at least one of its chain ends a polysiloxane block which ends in a trialkylsilyl group, said polysiloxane block corresponding to the formula: [—SiR1R2O—]x-SiR3R4R5, in which R1, R2, R3, R4 and R5 represent alkyl groups having from 1 to 20 carbon atoms, and in which x is a natural integer other than zero.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: April 11, 2006
    Assignee: Michelin Recherche et Technique S.A.
    Inventors: Pierre Robert, Jean-Luc Cabioch, Jean-Michel Favrot
  • Publication number: 20060063899
    Abstract: The present invention provides a process for preparing amino functionalized diene polymers with 1,4-trans linkage content equal to or greater than 70%. The invention also concerns polymers of such type, a rubber composition and a tire casing containing those polymers. The process of preparation according to the invention comprises polymerizing at least one diene monomer by means of a lithium catalytic system, which comprises at least one hydrocarbon solvent, one compound A of a IIIA group metal, one compound B of an alkaline earth metal and one aminolithium initiator C. Amino functionalized diene polymers with high 1,4-trans linkage content according to the invention are such that the amino function, situated at the end of the polymer chain, is a tertiary amino function, the rate of functionalization of said polymers being equal to or greater than 50% and the 1,4-trans linkage content being equal to or greater than 70%.
    Type: Application
    Filed: October 20, 2005
    Publication date: March 23, 2006
    Inventors: Jean-Michel Favrot, Philippe Laubry
  • Publication number: 20060009568
    Abstract: 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: Application
    Filed: July 19, 2005
    Publication date: January 12, 2006
    Applicant: MICHELIN RECHERCHE ET TECHNIQUE S.A.
    Inventors: Jean-Luc Cabioch, Laurent Coissieux, Jean-Michel Favrot, Franck Varagniat
  • Publication number: 20040260002
    Abstract: The present invention relates in particular to a preparation process for a copolymer having two blocks usable in a sulphur-cross-linkable rubber composition of reduced hysteresis in the cross-linked state, such a block copolymer in which one of the blocks is constituted of a polyisoprene and the other of a diene elastomer other than a polyisoprene, and this rubber composition for tyre treads.
    Type: Application
    Filed: April 30, 2004
    Publication date: December 23, 2004
    Applicant: MICHELIN RECHERCHE ET TECHNIQUE S.A.
    Inventors: Pierre Robert, Jean-Michel Favrot, Pierre Lesage
  • Patent number: 6815487
    Abstract: 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: Grant
    Filed: November 22, 2002
    Date of Patent: November 9, 2004
    Assignee: Michelin Recherche et Technique S.A.
    Inventors: Pierre Robert, Jean-Michel Favrot, Philippe Laubry, Fanny Barbotin
  • Patent number: 6815473
    Abstract: 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 constituting a tire tread, to a process for preparation of such a cross-linkable composition, to a tread of this type and to a tire having reduced rolling resistance. The rubber composition according to the invention is based on: an elastomeric matrix comprising at least one diene elastomer which comprises a carboxylic acid function at one or at each of its two chain ends, and a reinforcing filler comprising a reinforcing inorganic filler, wherein said diene elastomer has a molecular weight which is greater than 80,000 g/mol, and it is present in a majority quantity in said elastomeric matrix.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: November 9, 2004
    Assignee: Michelin Recherche Et Technique S.A.
    Inventors: Pierre Robert, Jean-Michel Favrot, Corinne Fradin-Cohas
  • Publication number: 20040220315
    Abstract: 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: Application
    Filed: June 2, 2004
    Publication date: November 4, 2004
    Applicant: Michelin Recherche et Technique S.A.
    Inventors: Pierre Robert, Jean-Michel Favrot, Philippe Laubry, Fanny Barbotin
  • Patent number: 6800582
    Abstract: The present invention provides a process for preparing amino functionalized diene polymers with 1,4-trans linkage content equal to or greater than 70%. The invention also concerns polymers of such type, a rubber composition and a tire casing containing those polymers. The process of preparation according to the invention comprises polymerizing at least one diene monomer by means of a lithium catalytic system, which comprises at least one hydrocarbon solvent, one compound A of a IIIA group metal, one compound B of an alkaline earth metal and one aminolithium initiator C. Amino functionalized diene polymers with high 1,4-trans linkage content according to the invention are such that the amino function, situated at the end of the polymer chain, is a tertiary amino function, the rate of functionalization of said polymers being equal to or greater than 50% and the 1,4-trans linkage content being equal to or greater than 70%.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: October 5, 2004
    Assignee: Michelin Recherche et Technique S.A.
    Inventors: Jean-Michel Favrot, Philippe Laubry
  • Publication number: 20040097633
    Abstract: The present invention relates to a vulcanizable rubber composition which can be used for the manufacture of tires, a process for the preparation of this composition and a tire, the tread of which comprises such a composition, the latter having improved hysteresis and physical properties in the vulcanized state, while retaining satisfactory processing properties.
    Type: Application
    Filed: November 12, 2003
    Publication date: May 20, 2004
    Applicant: Michelin Recherche et Technique S.A.
    Inventors: Pierre Robert, Jean-Luc Cabioch, Jean-Michel Favrot
  • Patent number: 6703448
    Abstract: The present invention relates to block copolymers intended to constitute an elastomeric matrix of a cross-linkable rubber composition with reduced hysteresis, to such a rubber composition which is usable in the cross-linked state in a tire tread, to such a tire tread and to a tire comprising said tire tread which exhibits reduced rolling resistance.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: March 9, 2004
    Assignee: Michelin Recherche et Technique S.A.
    Inventors: Robert Pierre, Jean-Michel Favrot, Jean-Luc Cabioch, Bernard Voullemier
  • Patent number: 6667362
    Abstract: The present invention relates to a vulcanizable rubber composition which can be used for the manufacture of tires, a process for the preparation of this composition and a tire, the tread of which comprises such a composition, the latter having improved hysteresis and physical properties in the vulcanized state, while retaining satisfactory processing properties. A rubber composition according to the invention comprises a reinforcing white filler, and is such that it comprises at least one diene block polymer which is intended to interact with said reinforcing white filler and which comprises on at least one of its chain ends a polysiloxane block which ends in a trialkylsilyl group, said polysiloxane block corresponding to the formula: [—SiR1R2O—]x-SiR3R4R5, in which R1, R2, R3, R4 and R5 represent alkyl groups having from 1 to 20 carbon atoms, and in which x is a natural integer other than zero.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: December 23, 2003
    Assignee: Michelin Recherche et Technique S.A.
    Inventors: Pierre Robert, Jean-Luc Cabioch, Jean-Michel Favrot
  • Publication number: 20030212223
    Abstract: The present invention provides a process for preparing amino functionalized diene polymers with 1,4-trans linkage content equal to or greater than 70%. The invention also concerns polymers of such type, a rubber composition and a tire casing containing those polymers. The process of preparation according to the invention comprises polymerizing at least one diene monomer by means of a lithium catalytic system, which comprises at least one hydrocarbon solvent, one compound A of a IIIA group metal, one compound B of an alkaline earth metal and one aminolithium initiator C. Amino functionalized diene polymers with high 1,4-trans linkage content according to the invention are such that the amino function, situated at the end of the polymer chain, is a tertiary amino function, the rate of functionalization of said polymers being equal to or greater than 50% and the 1,4-trans linkage content being equal to or greater than 70%.
    Type: Application
    Filed: March 28, 2003
    Publication date: November 13, 2003
    Inventors: Jean-Michel Favrot, Philippe Laubry
  • Publication number: 20030195288
    Abstract: 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: Application
    Filed: November 22, 2002
    Publication date: October 16, 2003
    Inventors: Pierre Robert, Jean-Michel Favrot, Philippe Laubry, Fanny Barbotin
  • Publication number: 20030195309
    Abstract: The present invention provides a process for preparing amino functionalized diene polymers with 1,4-trans linkage content equal to or greater than 70%. The invention also concerns polymers of such type, a rubber composition and a tire casing containing those polymers. The process of preparation according to the invention comprises polymerizing at least one diene monomer by means of a lithium catalytic system, which comprises at least one hydrocarbon solvent, one compound A of a IIIA group metal, one compound B of an alkaline earth metal and one aminolithium initiator C. Amino functionalized diene polymers with high 1,4-trans linkage content according to the invention are such that the amino function, situated at the end of the polymer chain, is a tertiary amino function, the rate of functionalization of said polymers being equal to or greater than 50% and the 1,4-trans linkage content being equal to or greater than 70%.
    Type: Application
    Filed: March 28, 2003
    Publication date: October 16, 2003
    Inventors: Jean-Michel Favrot, Philippe Laubry
  • Patent number: 6624267
    Abstract: The present invention provides a process for preparing amino functionalized diene polymers with 1,4-trans linkage content equal to or greater than 70%. The invention also concerns polymers of such type, a rubber composition and a tire casing containing those polymers. The process of preparation according to the invention comprises polymerizing at least one diene monomer by means of a lithium catalytic system, which comprises at least one hydrocarbon solvent, one compound A of a IIIA group metal, one compound B of an alkaline earth metal and one aminolithium initiator C. Amino functionalized diene polymers with high 1,4-trans linkage content according to the invention are such that the amino function, situated at the end of the polymer chain, is a tertiary amino function, the rate of functionalization of said polymers being equal to or greater than 50% and the 1,4-trans linkage content being equal to or greater than 70%.
    Type: Grant
    Filed: January 6, 2000
    Date of Patent: September 23, 2003
    Assignee: Michelin Recherche et Technique S.A.
    Inventors: Jean-Michel Favrot, Philippe Laubry
  • Patent number: 6503973
    Abstract: The present invention relates to a vulcanizable rubber composition which can be used for the manufacture of tires. The invention also provides for a tire, the tread of which comprises such a composition. The rubber composition posses improved hysteresis and physical properties in the vulcanized state, while retaining satisfactory processing properties in the non-vulcanized state. The rubber composition comprises a reinforcing white filler and a diene block copolymer which is intended to interact with the white filler, the block copolymer comprising a diene block polymer having on at least one chain end thereof a polyether block having a molecular weight of between 1000 g/mol and 3000 g/mol, the polyether block corresponding to the formula: O—CH2—CH2—O)n—R,  (I) in which n is an integer other than zero and R is a saturated or unsaturated hydrocarbon.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: January 7, 2003
    Assignee: Michelin Recherche et Technique S.A.
    Inventors: Pierre Robert, Jean-Luc Cabioch, Jean-Michel Favrot
  • Publication number: 20020183436
    Abstract: 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 constituting a tire tread, to a process for preparation of such a cross-linkable composition, to a tread of this type and to a tire having reduced rolling resistance.
    Type: Application
    Filed: January 23, 2002
    Publication date: December 5, 2002
    Inventors: Pierre Robert, Jean-Michel Favrot, Corinne Fradin-Cohas
  • Publication number: 20020179218
    Abstract: The present invention relates to block copolymers intended to constitute an elastomeric matrix of a cross-linkable rubber composition with reduced hysteresis, to such a rubber composition which is usable in the cross-linked state in a tire tread, to such a tire tread and to a tire comprising said tire tread which exhibits reduced rolling resistance.
    Type: Application
    Filed: December 21, 2001
    Publication date: December 5, 2002
    Inventors: Robert Pierre, Jean-Michel Favrot, Jean-Luc Cabioch, Bernard Voullemier