Patents by Inventor Stephane Girois

Stephane Girois 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).

  • Patent number: 10011673
    Abstract: The present invention relates to thermoplastic compositions comprising as impact modifier a rubber containing graft polymer prepared by the process of emulsion polymerization and recovered by a special process controlling and adjusting the pH value, the use of the thermoplastic compositions in the production of molded bodies, and to the molded, bodies themselves. The present invention relates also to thermoplastic compositions comprising a polymeric impact modifier with a core-shell structure made by a multistage process and recovered by a special process controlling and adjusting the pH value comprising at least one gradient polymer the use of the thermoplastic compositions in the production of molded bodies, and to the molded, bodies themselves.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: July 3, 2018
    Assignee: Arkema France
    Inventors: Christophe Navarro, Stephane Girois, Elisabeth Bay, Jean-Claude Saint-Martin, Magali Bergeret-Richaud
  • Patent number: 9714314
    Abstract: The present invention relates to new impact modifiers and a process for making these new impact modifiers and their use in polymeric compositions. More particularly the present invention relates to a new polymeric impact modifier with a core-shell structure made by a multistage polymerization process comprising at least one gradient polymer. The present invention relates as well to a process preparing such an impact modifier, especially its recovery process after the end of the polymerization. The present invention also relates to a thermoplastic composition comprising the new impact modifier.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: July 25, 2017
    Assignee: Arkema France
    Inventors: Christophe Navarro, Stephane Girois, Elisabeth Bay, Jean-Claude Saint-Martin
  • Patent number: 9527991
    Abstract: The invention relates to impact-modified polymer compositions, containing a polymer blend of polycarbonate with polyester and/or polyamide, plus an impact modifier blend of core/shell and functional polyolefin impact modifiers. The impact modifiers can provide the polymer blend composition with improved impact strength at equivalent loading, and also allow for higher amounts of polyester and/or polyamide in the blend without sacrificing impact strength.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: December 27, 2016
    Assignee: Arkema Inc.
    Inventors: Jason M. Lyons, Stephane Girois
  • Patent number: 9068036
    Abstract: The present invention relates to a process for producing impact modifiers, impact modified thermoplastic molding compositions and in particular impact modified polycarbonate or polycarbonate/polyester blends having improved resistance to degradation. More particularly the present invention relates to a process for producing polymeric impact modifiers with a core-shell structure made by a multistage process comprising a control and adjustment if necessary of the pH value before and during the recovery step.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: June 30, 2015
    Assignee: Arkema France
    Inventors: Christophe Navarro, Stephane Girois, Elisabeth Bay, Jean-Claude Saint-Martin
  • Publication number: 20140256848
    Abstract: The invention relates to impact-modified polymer compositions, containing a polymer blend of polycarbonate with polyester and/or polyamide, plus an impact modifier blend of core/shell and functional polyolefin impact modifiers. The impact modifiers can provide the polymer blend composition with improved impact strength at equivalent loading, and also allow for higher amounts of polyester and/or polyamide in the blend without sacrificing impact strength.
    Type: Application
    Filed: May 16, 2014
    Publication date: September 11, 2014
    Applicant: Arkema Inc.
    Inventors: Jason M. Lyons, Stephane Girois
  • Patent number: 8816008
    Abstract: The invention relates to an impact modified thermoplastic resin comprising a polymeric impact modifier with a core-shell structure comprising 2-octylacrylate.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: August 26, 2014
    Assignee: Arkema France
    Inventors: Rosangela Pirri, Stephane Girois, Pascale Dargelos, Magali Bergeret-Richaud
  • Patent number: 8802751
    Abstract: The invention relates to impact-modified polymer compositions, containing a polymer blend of polycarbonate with polyester and/or polyamide, plus an impact modifier blend of core/shell and functional polyolefin impact modifiers. The impact modifiers can provide the polymer blend composition with improved impact strength at equivalent loading, and also allow for higher amounts of polyester and/or polyamide in the blend without sacrificing impact strength.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: August 12, 2014
    Assignee: Arkema Inc.
    Inventors: Jason M. Lyons, Stephane Girois
  • Patent number: 8653192
    Abstract: A method for manufacturing a thermoplastic composition including: a polyester resin (c); a mixture including a copolymer (a) of an ?-olefin and of a monomer having an ethylenic unsaturation and an epoxy function, as well as a core-shell compound (b); characterized in that said method includes a first step of manufacture the mixture of (a) and (b) by extrusion at a temperature at which the copolymer (a) is in the molten state and at a maximum temperature of 60 to 180° C.; a second step of manufacturing the thermoplastic composition by extrusion or by mixing the polyester resin (c) with the mixture of (a) and (b) produced in the first step.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: February 18, 2014
    Assignee: Arkema France
    Inventors: Sebastien Quinebeche, Alexander Korzhenko, Alain Bouilloux, Stephane Girois
  • Patent number: 8642703
    Abstract: A composition including polyhydroxyalkanoic acid (PHA), an elastomeric compound of core-shell type, and an olefinic copolymer including an ethylenic monomer bearing an epoxy function. The PHA composition exhibits improved impact strength.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: February 4, 2014
    Assignee: Arkema France
    Inventors: Alain Bouilloux, Sébastien Quinebeche, Stephane Girois
  • Publication number: 20130281629
    Abstract: The invention relates to an impact modified thermoplastic resin comprising a polymeric impact modifier with a core-shell structure comprising 2-octylacrylate.
    Type: Application
    Filed: September 20, 2011
    Publication date: October 24, 2013
    Applicant: Arkema France
    Inventors: Rosangela Pirri, Stephane Girois, Pascale Dargelos, Magali Bergeret-Richaud
  • Publication number: 20120316293
    Abstract: A composition including polyhydroxyalkanoic acid (PHA), an elastomeric compound of core-shell type, and an olefinic copolymer including an ethylenic monomer bearing an epoxy function. The PHA composition exhibits improved impact strength.
    Type: Application
    Filed: January 17, 2012
    Publication date: December 13, 2012
    Applicant: Arkema France
    Inventors: Alain Bouilloux, Sébastien Quinebeche, Stephane Girois
  • Publication number: 20120271004
    Abstract: The invention relates to a method for manufacturing a thermoplastic composition including: a polyester resin (c); a mixture including a copolymer (a) of an ?-olefin and of a monomer having an ethylenic unsaturation and an epoxy function, as well as a core-shell compound (b); characterized in that said method includes a first step of manufacture the mixture of (a) and (b) by extrusion at a temperature at which the copolymer (a) is in the molten state and at a maximum temperature of 60 to 180° C.; a second step of manufacturing the thermoplastic composition by extrusion or by mixing the polyester resin (c) with the mixture of (a) and (b) produced in the first step.
    Type: Application
    Filed: July 13, 2010
    Publication date: October 25, 2012
    Applicant: Arkema France
    Inventors: Sébastien Quinebeche, Alexander Korzhenko, Alain Bouilloux, Stephane Girois
  • Publication number: 20120157629
    Abstract: The present invention relates to new impact modifiers and a process for making these new impact modifiers and their use in polymeric compositions. More particularly the present invention relates to a new polymeric impact modifier with a core-shell structure made by a multistage polymerization process comprising at least one gradient polymer. The present invention relates as well to a process preparing such an impact modifier, especially its recovery process after the end of the polymerization. The present invention also relates to a thermoplastic composition comprising the new impact modifier.
    Type: Application
    Filed: December 14, 2011
    Publication date: June 21, 2012
    Applicant: Arkema France
    Inventors: Christophe Navarro, Stephane Girois, Elisabeth Bay, Jean-Claude Saint-Martin
  • Publication number: 20120157601
    Abstract: The present invention relates to a process for producing impact modifiers, impact modified thermoplastic molding compositions and in particular impact modified polycarbonate or polycarbonate/polyester blends having improved resistance to degradation. More particularly the present invention relates to a process for producing polymeric impact modifiers with a core-shell structure made by a multistage process comprising a control and adjustment if necessary of the pH value before and during the recovery step.
    Type: Application
    Filed: December 14, 2011
    Publication date: June 21, 2012
    Applicant: Arkema France
    Inventors: Christophe Navarro, Stephane Girois, Elisabeth Bay, Jean-Claude Saint-Martin
  • Publication number: 20120157628
    Abstract: The present invention relates to, amongst other things, a process for manufacturing an impact modifier, concerns impact modified thermoplastic molding compositions and in particular a process for manufacturing and recovering the impact modifiers and their use in polymeric thermoplastic compositions. More particularly the present invention relates to a polymeric impact modifier with a core-shell structure manufactured by a multistage process comprising a special recovery process so that the composition of the thermoplastic polymer containing the impact modifier has a high fluidity while keeping its high impact strength.
    Type: Application
    Filed: December 14, 2011
    Publication date: June 21, 2012
    Applicant: Arkema France
    Inventors: Christophe Navarro, Stephane Girois, Elisabeth Bay, Jean-Claude Saint-Martin, Magali Bergeret-Richaud
  • Publication number: 20120157630
    Abstract: The present invention relates to thermoplastic compositions comprising as impact modifier a rubber containing graft polymer prepared by the process of emulsion polymerization and recovered by a special process controlling and adjusting the value, the use of the thermoplastic compositions in the production of molded bodies, and to the molded, bodies themselves. The present invention relates also to thermoplastic compositions comprising a polymeric impact modifier with a core-shell structure made by a multistage process and recovered by a special process controlling and adjusting the pH value comprising at least one gradient polymer the use of the thermoplastic compositions in the production of molded bodies, and to the molded, bodies themselves.
    Type: Application
    Filed: December 14, 2011
    Publication date: June 21, 2012
    Applicant: Arkema France
    Inventors: Christophe Navarro, Stephane Girois, Elisabeth Bay, Jean-Claude Saint-Martin, Magali Bergeret-Richaud
  • Publication number: 20120108729
    Abstract: The invention relates to impact-modified polymer compositions, containing a polymer blend of polycarbonate with polyester and/or polyamide, plus an impact modifier blend of core/shell and functional polyolefin impact modifiers. The impact modifiers can provide the polymer blend composition with improved impact strength at equivalent loading, and also allow for higher amounts of polyester and/or polyamide in the blend without sacrificing impact strength.
    Type: Application
    Filed: June 9, 2010
    Publication date: May 3, 2012
    Applicant: Arkema Inc.
    Inventors: Jason M. Lyons, Stephane Girois
  • Publication number: 20100048797
    Abstract: The present invention relates to a thermoplastic composition, said composition comprising at least one non-PVC thermoplastic matrix and at least one copolymer chosen from the group consisting of acrylic-based copolymer having an average molecular weight Mw below 400.000 g/mol and acrylic-styrene-based copolymer. The present invention also relates to a process for manufacturing an article from such a thermoplastic composition and to an article obtained from such a thermoplastic composition.
    Type: Application
    Filed: July 12, 2007
    Publication date: February 25, 2010
    Applicant: Arkema France
    Inventors: Stephane Girois, Claude C. Granel, Philippe Hajji, Jeffrey Brake, Alexis Chenet, Francoise Fenouillot-Rimlinger, Henry Sautereau
  • Patent number: 7572862
    Abstract: The invention relates to a process aid for use in rigid thermoplastic compositions, and especially in rigid polyvinylchloride (PVC) compositions. The process aid is an acrylic terpolymer of methylmethacrylate, butyl acrylate and styrene at an optimal ratio to produce a significant reduction in melt process viscosity. The resulting reduction in extrusion melt torques enables manufacturers of rigid PVC products to have higher throughput production rates.
    Type: Grant
    Filed: February 8, 2005
    Date of Patent: August 11, 2009
    Assignee: Arkema Inc.
    Inventors: Mark Lavach, Paul Lavallee, Jason Pomante, Wayne Ranbom, Lisa Rachwal, Stephane Girois
  • Publication number: 20090088526
    Abstract: The invention relates to an impact-resistant transparent composition comprising a copolymer having repeat units resulting from the polymerization of acrylonitrile and of at least one vinylaromatic monomer, a particulate block copolymer and a core-shell copolymer.
    Type: Application
    Filed: December 8, 2006
    Publication date: April 2, 2009
    Inventors: Laurent Gervat, Christophe Navarro, Pierre Gerard, Stephane Girois