Patents by Inventor SEVERIN DRONET
SEVERIN DRONET 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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Patent number: 11987671Abstract: An elastomeric mixture comprises at least: one diene elastomer/polylactide copolymer A1 comprising a polylactide block PLLA or PDLA, where appropriate one or more other polylactide blocks which are all PLLA when the first block is PLLA or which are all PDLA when the first block is PDLA, the mass percentage of the polylactide block(s) being between 10% and 50% by weight relative to the weight of the copolymer A1, and a diene elastomer/polylactide copolymer B1 the mass percentage of the polylactide block(s) in said copolymer B1 being between 10% and 50% by weight relative to the weight of the copolymer B1, or a polylactide B2, or a mixture of said copolymer B1 and of said polylactide B2, the names PLLA and PDLA denoting a chain consisting of units of formula (I) —[CH(CH3)—C(O)—O]— (I), of which at least 70% by weight are, respectively, of L and D configuration.Type: GrantFiled: June 18, 2019Date of Patent: May 21, 2024Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: Nathalie Coste, Lise Maisonneuve, Gilles Mioche, Severin Dronet, Julien Cayuela, Bertrand De Backer, Philippe Ghislain Dubois
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Patent number: 11865865Abstract: A tire comprises a rubber layer comprising from 50% to 100% by mass of a rubber crumb having a ratio of the chloroform extract to the acetone extract of less than 2, the chloroform and acetone extracts being expressed as percentages by mass.Type: GrantFiled: December 13, 2019Date of Patent: January 9, 2024Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: Nathalie Coste, Severin Dronet, Vincent Lafaquiere, Claire Rannoux
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Publication number: 20220098402Abstract: A polymer composition comprises: a) at least one block thermoplastic elastomer comprising at least one elastomer block and at least one thermoplastic block, the elastomer block(s) predominantly comprising units derived from butadiene, the thermoplastic block(s) consisting of units derived from one or more styrene monomers, b) at least one plasticizer selected from butadiene oligomers with: b1) the molar content of 1,2-polybutadiene units in said plasticizer is within a range of from 70% to 130% of that in the elastomer block of the thermoplastic elastomer, and the molar mass of the plasticizer is greater than 1500 and less than 50 000 g/mol, or else b2) the molar content of 1,2-polybutadiene units in the plasticizer is less than 70%, or greater than 130%, of that in the elastomer block of the thermoplastic elastomer, and the molar mass of the plasticizer is greater than 4000 and less than 50 000 g/mol.Type: ApplicationFiled: December 24, 2019Publication date: March 31, 2022Inventors: MATHILDE ABAD, NATHALIE COSTE, GUILLAUME ESPY, SEVERIN DRONET, KAHINA MAMMERI
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Publication number: 20220064412Abstract: A tire comprises a rubber composition based on at least a rubber crumb, a diene elastomer, a pro-oxidant, a reinforcing filler and a crosslinking system, said rubber crumb representing 30% by mass or more of the composition, and exhibiting a ratio of the chloroform extract to the acetone extract of less than 2, the chloroform and acetone extracts being expressed as percentages by mass.Type: ApplicationFiled: December 13, 2019Publication date: March 3, 2022Inventors: NATHALIE COSTE, SEVERIN DRONET, GUILLAUME HENNEBERT
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Publication number: 20220055406Abstract: A tire comprises a rubber layer comprising from 50% to 100% by mass of a rubber crumb having a ratio of the chloroform extract to the acetone extract of less than 2, the chloroform and acetone extracts being expressed as percentages by mass.Type: ApplicationFiled: December 13, 2019Publication date: February 24, 2022Inventors: NATHALIE COSTE, SEVERIN DRONET, VINCENT LAFAQUIERE, CLAIRE RANNOUX
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Patent number: 11155665Abstract: The present invention relates to a process for preparing a diene elastomer/polylactide copolymer, the weight percentage of polylactide being between 10% and 45% by weight, relative to the weight of the copolymer, characterized in that lactide, an elastomer functionalized by at least one group bearing at least one function capable of initiating a ring-opening polymerization of the lactide and a catalytic system are introduced into an extruder (A).Type: GrantFiled: December 21, 2017Date of Patent: October 26, 2021Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: Severin Dronet, Gilles Mioche, Lise Maisonneuve, Nathalie Coste, Julien Cayuela, Leila Bonnaud, Philippe Ghislain Dubois
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Publication number: 20210253801Abstract: An elastomeric mixture comprises at least: one diene elastomer/polylactide copolymer A1 comprising a polylactide block PLLA or PDLA, where appropriate one or more other polylactide blocks which are all PLLA when the first block is PLLA or which are all PDLA when the first block is PDLA, the mass percentage of the polylactide block(s) being between 10% and 50% by weight relative to the weight of the copolymer A1, and a diene elastomer/polylactide copolymer B1 the mass percentage of the polylactide block(s) in said copolymer B1 being between 10% and 50% by weight relative to the weight of the copolymer B1, or a polylactide B2, or a mixture of said copolymer B1 and of said polylactide B2, the names PLLA and PDLA denoting a chain consisting of units of formula (I) —[CH(CH3)—C(O)—O]— (I), of which at least 70% by weight are, respectively, of L and D configuration.Type: ApplicationFiled: June 18, 2019Publication date: August 19, 2021Inventors: NATHALIE COSTE, LISE MAISONNEUVE, GILLES MIOCHE, SEVERIN DRONET, JULIEN CAYUELA, BERTRAND DE BACKER, PHILIPPE GHISLAIN DUBOIS
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Publication number: 20210130526Abstract: The present invention relates to a process for preparing a diene elastomer/polylactide copolymer, the weight percentage of polylactide being between 10% and 45% by weight, relative to the weight of the copolymer, characterized in that lactide, an elastomer functionalized by at least one group bearing at least one function capable of initiating a ring-opening polymerization of the lactide and a catalytic system are introduced into an extruder (A).Type: ApplicationFiled: December 21, 2017Publication date: May 6, 2021Inventors: SEVERIN DRONET, GILLES MIOCHE, LISE MAISONNEUVE, NATHALIE COSTE, JULIEN CAYUELA, LEILA BONNAUD, PHILIPPE GHISLAIN DUBOIS
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Patent number: 10961374Abstract: A rubber composition based on at least an elastomer matrix is provided. The elastomer matrix comprises a first diene elastomer having a number-average molecular weight, Mn, of greater than or equal to 100 000 g/mol; a functionalized second diene elastomer bearing at the chain end a function capable of reacting with the surface of silica, said functionalized diene elastomer having a number-average molecular weight, Mn, of less than or equal to 80 000 g/mol: and a reinforcing inorganic filler, in an amount ranging from 55 phr to 200 phr. The elastomeric matrix allows good dispersion of the reinforcing inorganic filler. A finished or semi-finished article comprising such a composition, tire tread comprising such a composition, and a tire or semi-finished product comprising such a composition is also provided.Type: GrantFiled: December 21, 2017Date of Patent: March 30, 2021Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: Séverin Dronet, Laurent Petitjean, Marc Couty, Corentin Pavageau
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Patent number: 10723814Abstract: A tire comprising a rubber composition comprising a substituted diene elastomer is provided. The substituted diene elastomer comprises units bearing an A-B radical, in which: A represents an aliphatic C3-C35 radical which can be interrupted by one or more heteroatom(s), and B represents a linear, branched or cyclic C1-C6 hydrocarbon radical. A and B are such that the melting point of the analogue, H-A-B, is less than 70° C., and the substituted diene elastomer comprises from 10% to 40% by weight of the A-B radical, with respect to the total weight of the elastomer. A tread comprising such a rubber composition is also provided. A rubber composition comprising such a substituted diene elastomer and at least one of the following constituents: a second diene elastomer; a reinforcing filler and, if appropriate, a coupling agent is also provided.Type: GrantFiled: December 22, 2016Date of Patent: July 28, 2020Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: Séverin Dronet, Corentin Pavageau, Benoît Schnell
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Publication number: 20200190326Abstract: A process for the preparation of a polydiene/polyamide block thermoplastic elastomer (TPE) copolymer of comb structure is provided. The percentage by weight of polyamide of the copolymer is between 10% and 35% by weight, with respect to the weight of the copolymer. The polyamide and a diene elastomer functionalized by at least one pendant epoxide functional group along the main chain are introduced into an extruder. A polydiene/polyamide block thermoplastic elastomer (TPE) copolymer of comb structure is also provided. The copolymer comprises units bearing a pendant polyamide along the chain which is bonded to the latter via a group resulting from the reaction, with an epoxide functional group, of an amine or acid functional group of the polyamide. A rubber composition comprising the copolymer, and a tire comprising the rubber composition is also provided.Type: ApplicationFiled: December 21, 2017Publication date: June 18, 2020Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: Nathalie COSTE, Séverin DRONET
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Patent number: 10513150Abstract: The present invention relates to comb block copolymers, combining an elastomeric backbone and rigid pendent blocks and thus having thermoplastic elastomer properties. The invention targets in particular comb block copolymers which may be used as a material as is. According to the invention, the comb block copolymer is a diene/polypropylene thermoplastic elastomer copolymer, characterized in that it consists of a backbone, said backbone being derived from a diene elastomer, and in that it comprises from 5% to 50% by weight, relative to the total weight of the copolymer, of pendent semicrystalline polypropylene groups distributed along the backbone. Another subject of the invention is the process for preparing same, and the compositions comprising same. Finally, a subject of the invention is a tire, one of the constituent elements of which comprises such a composition.Type: GrantFiled: June 16, 2016Date of Patent: December 24, 2019Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: Séverin Dronet, Julien Thuilliez
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Publication number: 20190367711Abstract: A rubber composition based on at least an elastomer matrix is provided. The elastomer matrix comprises a first diene elastomer having a number-average molecular weight, Mn, of greater than or equal to 100 000 g/mol; ii. a functionalized second diene elastomer bearing at the chain end a function capable of reacting with the surface of silica, said functionalized diene elastomer having a number-average molecular weight, Mn, of less than or equal to 80 000 g/mol; and a reinforcing inorganic filler, in an amount ranging from 55 phr to 200 phr. The elastomeric matrix allows good dispersion of the reinforcing inorganic filler. A finished or semi-finished article comprising such a composition, a tyre tread comprising such a composition, and a tire or semi-finished product comprising such a composition is also provided.Type: ApplicationFiled: December 21, 2017Publication date: December 5, 2019Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: Séverin DRONET, Laurent PETITJEAN, Marc COUTY, Corentin PAVAGEAU
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Publication number: 20190002599Abstract: A tire comprising a rubber composition comprising a substituted diene elastomer is provided. The substituted diene elastomer comprises units bearing an A-B radical, in which: A represents an aliphatic C3-C35 radical which can be interrupted by one or more heteroatom(s), and B represents a linear, branched or cyclic C1-C6 hydrocarbon radical. A and B are such that the melting point of the analogue, H-A-B, is less than 70° C., and the substituted diene elastomer comprises from 10% to 40% by weight of the A-B radical, with respect to the total weight of the elastomer. A tread comprising such a rubber composition is also provided. A rubber composition comprising such a substituted diene elastomer and at least one of the following constituents: a second diene elastomer; a reinforcing filler and, if appropriate, a coupling agent is also provided.Type: ApplicationFiled: December 22, 2016Publication date: January 3, 2019Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELINInventors: Séverin DRONET, Corentin PAVAGEAU, Benoît SCHNELL
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Publication number: 20180170106Abstract: The present invention relates to comb block copolymers, combining an elastomeric backbone and rigid pendent blocks and thus having thermoplastic elastomer properties. The invention targets in particular comb block copolymers which may be used as a material as is. According to the invention, the comb block copolymer is a diene/polypropylene thermoplastic elastomer copolymer, characterized in that it consists of a backbone, said backbone being derived from a diene elastomer, and in that it comprises from 5% to 50% by weight, relative to the total weight of the copolymer, of pendent semicrystalline polypropylene groups distributed along the backbone. Another subject of the invention is the process for preparing same, and the compositions comprising same. Finally, a subject of the invention is a tire, one of the constituent elements of which comprises such a composition.Type: ApplicationFiled: June 16, 2016Publication date: June 21, 2018Inventors: Séverin DRONET, Julien THUILLIEZ