Patents by Inventor Bernadette Charleux
Bernadette Charleux 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: 20210024673Abstract: Process for the preparation of a vinylidene chloride polymer comprising polymerizing vinylidene chloride and optionally at least one ethylenically unsaturated monomer copolymerizable therewith under the control of a RAFT agent of formula (II).Type: ApplicationFiled: May 11, 2020Publication date: January 28, 2021Inventors: Jerome VINAS, Emilie VELASQUEZ, Pierre-Emmanuel DUFILS, Jutta RIEGER, François STOFFELBACH, Muriel LANSALOT, Franck D'AGOSTO, Bernadette CHARLEUX, Yves VANDERVEKEN
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Patent number: 10745582Abstract: The present invention relates to a dispersion of polymer particles in a liquid carbon-based medium, the said particles having a flexible polymeric core and being surface-stabilized with a block stabilizing polymer comprising at least one block that is soluble in the said carbon-based medium and at least one block that is insoluble in the said carbon-based medium. The invention also relates to a cosmetic composition comprising the said dispersion, and to a cosmetic treatment process using the said composition.Type: GrantFiled: October 6, 2009Date of Patent: August 18, 2020Assignee: L'OREALInventors: Celine Farcet, Lisa Houillot, Maud Save, Bernadette Charleux
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Patent number: 10215740Abstract: The present invention relates to a method for manufacturing a chromatography column, in particular for a gas phase chromatography, comprising a stationary phase made from a sol. This method comprises the following steps: (a) introducing this sol at the first end of the column, (b) moving said sol towards the second end of the column, so that a sol layer is formed on the internal wall of the column, this layer being able to form a gel on said internal wall, and (c) drying of the gel. The present invention also relates to a capillary column as well as to a microcolumn which may be manufactured according to this method.Type: GrantFiled: July 28, 2014Date of Patent: February 26, 2019Assignees: Commissariat à l'énergie atomique et aux énergies alternatives, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFQUE, UNIVERSITE Claude Bernard LYON 1, CPE Lyon FCRInventors: David Lefebvre, Bernadette Charleux, Florence Ricoul, Chloe Thieuleux
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Patent number: 9745399Abstract: The invention relates to polymer particles in the form of filaments formed by block copolymers, as well as to the method for preparing same by means of controlled radical polymerization in emulsion in the presence of a specific living macroinitiator derived from a nitroxide. The invention is characterized in that the filamentous particles are obtained in a dispersed aqueous medium by means of the synthesis of said block copolymers, performed by heating the reaction medium at a temperature of 60 to 120° C., the final block copolymer containing between 10 and 50 mol. % of the macroinitiator which is water soluble and the hydrophobic monomer conversion rate being at least 50%. According to the invention, the weight ratio of hydrophilic fraction of the filamentous particles is less than 25 wt %.Type: GrantFiled: December 16, 2011Date of Patent: August 29, 2017Assignees: ARKEMA FRANCE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE PIERRE ET MARIE CURIEInventors: Stephanie Magnet, Raber Inoubli, Laurence Couvreur, Bernadette Charleux, Segolene Brusseau
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Publication number: 20160250108Abstract: The invention relates to the use of polymer particles in the form of filaments formed by block copolymers, as viscosifiers or agents that modify the rheology of organic or aqueous solutions. More specifically, the invention relates to the use of said crosslinked filamentous polymer particles for improving the resistance to heat ageing of an organic or aqueous solution.Type: ApplicationFiled: July 23, 2014Publication date: September 1, 2016Applicants: ARKEMA FRANCE, UNIVERSITE CLAUDE BERNARD LYON 1, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Bernadette CHARLEUX, Franck D'AGOSTO, Raber INOUBLI, Stephanie MAGNET
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Publication number: 20160169844Abstract: The present invention relates to a method for manufacturing a chromatography column, in particular for a gas phase chromatography, comprising a stationary phase made from a sol. This method comprises the following steps: (a) introducing this sol at the first end of the column, (b) moving said sol towards the second end of the column, so that a sol layer is formed on the internal wall of the column, this layer being able to form a gel on said internal wall, and (c) drying of the gel. The present invention also relates to a capillary column as well as to a microcolumn which may be manufactured according to this method.Type: ApplicationFiled: July 28, 2014Publication date: June 16, 2016Applicants: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE CLAUDE BERNARD LYON 1, CPE LYON FCRInventors: David LEFEBVRE, Bernadette CHARLEUX, Florence RICOUL, Chloe THIEULEUX
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Patent number: 9078837Abstract: The invention relates to polymer particles in the form of filaments formed by block copolymers, as well as to the use thereof as rheology modifiers for aqueous or organic solutions. A first aspect of the invention relates to filamentous polymer particles having a length/diameter ratio greater than 100, said particles being formed by block copolymers synthesized by controlled radical emulsion polymerization in emulsion, performed using at least one hydrophobic monomer in the presence of a water-soluble marcoinitiator. The invention is characterized in that the filamentous particles are obtained in an aqueous medium for the synthesis of said block copolymers, performed by heating the reaction medium to a temperature of 60 to 120° C., the final block copolymer containing between 10 and 50 mol. % of the water-soluble macroinitiator and the hydrophobic monomer conversion rate being at least 50%.Type: GrantFiled: December 22, 2011Date of Patent: July 14, 2015Assignees: Arkema France, Universite Pierre et Marie Curie, Centre National De La Recherche Scientifique, Universite Claude Bernard Lyon, Ecole Superieure de Chimie Physique Electronique de LyonInventors: Stephanie Magnet, Raber Inoubli, Laurence Couvreur, Bernadette Charleux, Segolene Brusseau
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Publication number: 20140364558Abstract: Process for the preparation of a vinylidene chloride polymer comprising polymerizing vinylidene chloride and optionally at least one ethylenically unsaturated monomer copolymerizable therewith under the control of a RAFT agent of formula (II).Type: ApplicationFiled: December 18, 2012Publication date: December 11, 2014Inventors: Jérme Vinas, Emilie Velasquez, Pierre-Emmanuel Dufils, Jutta Rieger, Francois Stoffelbach, Muriel Lansalot, Franck D'Agosto, Bernadette Charleux, Yves Vanderveken
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Publication number: 20140039067Abstract: The invention relates to polymer particles in the form of filaments formed by block copolymers, as well as to the use thereof as rheology modifiers for aqueous or organic solutions. A first aspect of the invention relates to filamentous polymer particles having a length/diameter ratio greater than 100, said particles being formed by block copolymers synthesized by controlled radical emulsion polymerization in emulsion, performed using at least one hydrophobic monomer in the presence of a water-soluble marcoinitiator. The invention is characterized in that the filamentous particles are obtained in an aqueous medium for the synthesis of said block copolymers, performed by heating the reaction medium to a temperature of 60 to 120° C., the final block copolymer containing between 10 and 50 mol. % of the water-soluble macroinitiator and the hydrophobic monomer conversion rate being at least 50%.Type: ApplicationFiled: December 22, 2011Publication date: February 6, 2014Applicant: Universite Pierre et Marie CurieInventors: Stephanie Magnet, Raber Inoubli, Laurence Couvreur, Bernadette Charleux, Segolene Brusseau
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Publication number: 20130338315Abstract: The invention relates to polymer particles in the form of filaments formed by block copolymers, as well as to the method for preparing same by means of controlled radical polymerization in emulsion in the presence of a specific living macroinitiator derived from a nitroxide. The invention is characterized in that the filamentous particles are obtained in a dispersed aqueous medium by means of the synthesis of said block copolymers, performed by heating the reaction medium at a temperature of 60 to 120° C., the final block copolymer containing between 10 and 50 mol. % of the macroinitiator which is water soluble and the hydrophobic monomer conversion rate being at least 50%. According to the invention, the weight ratio of hydrophilic fraction of the filamentous particles is less than 25 wt %.Type: ApplicationFiled: December 16, 2011Publication date: December 19, 2013Applicant: Universite Pierre et Marie CurieInventors: Stephanie Magnet, Raber Inoubli, Laurence Couvreur, Bernadette Charleux, Segolene Brusseau
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Patent number: 8598289Abstract: The invention relates to an amphiphilic block copolymer, to the preparation thereof, and to the use thereof in the form of a self-stabilizing latex. The copolymer has the formula R5O—[—CH2CH2—O—]n—C(?O)—CR3R4—[CH2CR6R7]m—S—C(?S)—S—R1 where: R1 is a straight or branched alkyl group, an alkenyl group having one or more —C?C— bonds, or an alkynyl group having one or more —C?C— bonds, said groups including 8 to 18 carbon atoms; 20?n?100; R3 and R4 each are independently H, an alkyl group with 1 to 4 carbon atoms, or a nitrile group, at least one of R3 and R4 being different than H; R6 is a phenyl group or an alkoxycarbonyl group in which the alkoxy group includes 1 to 8 carbon atoms; R7 is a hydrogen atom or a methyl radical; and 20?m?1000.Type: GrantFiled: May 11, 2009Date of Patent: December 3, 2013Assignees: Universite Pierre et Marie Curie, Centre National de la Recherche, Universite de Liege (Interface Entreprise Universite)Inventors: Bernadette Charleux, Jutta Rieger, François Stoffelbach
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Patent number: 8481631Abstract: The invention relates to a process for the preparation of an aqueous dispersion of polymer particles in an aqueous medium employing a living macroinitiator requiring a reinitiation temperature of less than 100° C. Application of the particles obtained in the field of surface coatings.Type: GrantFiled: May 19, 2009Date of Patent: July 9, 2013Assignees: Arkema France, Centre de la Recherche Scientifique, Universite Pierre et Marie Curie (Paris 6)Inventors: Charlotte Dire, Bernadette Charleux, Stéphanie Magnet, Laurence Couvreur
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Use of copolymers with a composition gradient as stabilizers in emulsion free-radical polymerization
Patent number: 8389637Abstract: The present invention describes the use of copolymers with a composition gradient as sole stabilizer in emulsion free-radical polymerization. The copolymers of the invention are prepared via controlled free-radical polymerization and comprise at least one hydrophilic monomer such as acrylic acid and at least one hydrophobic monomer such as styrene.Type: GrantFiled: December 22, 2005Date of Patent: March 5, 2013Assignee: Arkema FranceInventors: Stephanie Magnet, Olivier Guerret, Catherine Lefay, Bernadette Charleux -
Patent number: 8361908Abstract: The use of at least one diazonium salt bearing an initiator function, for forming an undercoat obtained by grafting a graft derived from the diazonium salt and bearing an initiator function at the surface of a conductive or semiconductive material on the undercoat, and for forming on the undercoat a polymeric layer obtained by polymerization, in particular free radical polymerization, in situ of at least one monomer, initiated from the initiator function.Type: GrantFiled: September 23, 2011Date of Patent: January 29, 2013Assignees: Universite Paris 7-Denis Diderot, AlchimedicsInventors: Mohamed Mehdi Chehimi, Jean Pinson, Bernadette Charleux, Christophe Bureau, Christopher Tronche, Tarik Matrab, Christian Perruchot, Eva Cabet-Deliry, Maud Save
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Publication number: 20120015138Abstract: The use of at least one diazonium salt bearing an initiator function, for forming an undercoat obtained by grafting a graft derived from the diazonium salt and bearing an initiator function at the surface of a conductive or semiconductive material on the undercoat, and for forming on the undercoat a polymeric layer obtained by polymerization, in particular free radical polymerization, in situ of at least one monomer, initiated from the initiator function.Type: ApplicationFiled: September 23, 2011Publication date: January 19, 2012Applicants: ALCHIMEDICS, UNIVERSITE PARIS 7-DENIS DIDEROTInventors: Mohamed Mehdi CHEHIMI, Jean Pinson, Bernadette Charleux, Christophe Bureau, Christopher Tronche, Tarik Matrab, Christian Perruchot, Eva Cabet-Deliry, Maud Save
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Patent number: 8053567Abstract: The use of at least one diazonium salt bearing an initiator function, for forming an undercoat obtained by grafting a graft derived from the diazonium salt and bearing an initiator function at the surface of a conductive or semiconductive material on the undercoat, and for forming on the undercoat a polymeric layer obtained by polymerization, in particular free radical polymerization, in situ of at least one monomer, initiated from the initiator function.Type: GrantFiled: June 2, 2005Date of Patent: November 8, 2011Assignees: Universite Paris 7—Denis Diderot, AlchimedicsInventors: Mohamed Mehdi Chehimi, Jean Pinson, Bernadette Charleux, Christophe Bureau, Christopher Tronche, Tarik Matrab, Christian Perruchot, Eva Cabet-Deliry, Maud Save
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Publication number: 20110243864Abstract: The present invention relates to a dispersion of polymer particles in a liquid carbon-based medium, the said particles having a flexible polymeric core and being surface-stabilized with a block stabilizing polymer comprising at least one block that is soluble in the said carbon-based medium and at least one block that is insoluble in the said carbon-based medium. The invention also relates to a cosmetic composition comprising the said dispersion, and to a cosmetic treatment process using the said composition.Type: ApplicationFiled: October 6, 2009Publication date: October 6, 2011Applicant: L'OREALInventors: Celine Farcet, Lisa Houillot, Maud Save, Bernadette Charleux
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Publication number: 20110207881Abstract: The invention relates to an amphiphilic block copolymer, to the preparation thereof, and to the use thereof in the form of a self-stabilizing latex. The copolymer has the formula R5O—[—CH2CH2—O—]n—C(?O)—CR3R4—[CH2CR6R7]m—S—C(?S)—S—R1 where: R1 is a straight or branched alkyl group, an alkenyl group having one or more —C?C— bonds, or an alkynyl group having one or more —C?C— bonds, said groups including 8 to 18 carbon atoms; 20?n?100; R3 and R4 each are independently H, an alkyl group with 1 to 4 carbon atoms, or a nitrile group, at least one of R3 and R4 being different than H; R6 is a phenyl group or an alkoxycarbonyl group in which the alkoxy group includes 1 to 8 carbon atoms; R7 is a hydrogen atom or a methyl radical; and 20?m?1000.Type: ApplicationFiled: May 11, 2009Publication date: August 25, 2011Inventors: Bernadette Charleux, Jutta Rieger, François Stoffelbach
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Publication number: 20110166282Abstract: The invention relates to a process for the preparation of an aqueous dispersion of polymer particles in an aqueous medium employing a living macroinitiator requiring a reinitiation temperature of less than 100° C. Application of the particles obtained in the field of surface coatings.Type: ApplicationFiled: May 19, 2009Publication date: July 7, 2011Applicants: ARKEMA FRANCE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Universite Pierre Et Marie Curie (Paris 6)Inventors: Charlotte Dire, Bernadette Charleux, Stéphanie Magnet, Laurence Couvreur
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Patent number: 7935769Abstract: The invention relates to a method for preparing a living polymer comprising methacrylic and/or methacrylate units using a monofunctional or polyfunctional alkoxyamine consisting in polymerising one or several types of methacrylic an/or methacrylate units.Type: GrantFiled: November 20, 2006Date of Patent: May 3, 2011Assignee: Arkema FranceInventors: Pierre Gerard, Stephanie Magnet, Olivier Guerret, Bernadette Charleux, Julien Nicolas