Patents by Inventor Brigitte Defoort

Brigitte Defoort 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: 20210024533
    Abstract: A process for manufacturing chromenes which are intended for the preparation of thermosetting resins, includes transforming an aromatic propargyl ether of general formula (I) into a chromene by flash vacuum thermolysis, at a temperature of between 300 and 600° C., at a pressure of between 4 and 10 000 Pa. It also concerns a process for preparing a material made of thermoset resin, including successively: a) implementation of the above process; b) polymerization of the reaction product obtained in a) so as to obtain the material made of thermoset resin; c) recovery of the material made of thermoset resin obtained in b).
    Type: Application
    Filed: July 23, 2020
    Publication date: January 28, 2021
    Inventors: Robin POUYET, Xavier COQUERET, Brigitte DEFOORT, Bastien RIVIERES
  • Publication number: 20210024534
    Abstract: A process for manufacturing chromenes intended for the preparation of thermosetting resins, includes transforming an aromatic propargyl ether of general formula (I) into a chromene by homogeneous gold(I) catalysis with the catalyst (acetonitrile)[(2-biphenyl)di-tert-butylphosphine]gold(I) hexafluoroantimonate in an organic solvent under an inert or non-inert atmosphere. Moreover, a process for preparing a material made of thermoset resin, includes successively a) implementation of the above process; polymerization of the reaction product obtained in step a) so as to obtain the material made of thermoset resin; c) recovery of the material made of thermoset resin obtained in step b).
    Type: Application
    Filed: July 23, 2020
    Publication date: January 28, 2021
    Inventors: Robin POUYET, Xavier COQUERET, Brigitte DEFOORT, Bastien RIVIERES
  • Publication number: 20210024535
    Abstract: A process for producing chromenes intended for the preparation of thermosetting resins, includes converting an aromatic propargyl ether of general formula (I) into a chromene by homogeneous catalysis with copper salts in anisole at a temperature between 100 and 170° C. Moreover, a process for preparing a material made of thermoset resin, includes successively a) carrying out the above process; b) polymerizing the reaction product obtained in a) so as to obtain the material made of thermoset resin; c) recovering the material made of thermoset resin obtained in b).
    Type: Application
    Filed: July 23, 2020
    Publication date: January 28, 2021
    Inventors: Robin POUYET, Xavier COQUERET, Brigitte DEFOORT, Bastien RIVIERES
  • Publication number: 20200399419
    Abstract: A difunctional biphenyl compounds corresponding to formula (I) wherein Alk, Alk? and R are as defined in the description. These compounds are suitable as hardeners for thermosetting resins, especially epoxy resins.
    Type: Application
    Filed: February 7, 2019
    Publication date: December 24, 2020
    Inventors: Etienne SAVONNET, Brigitte DEFOORT, Henri CRAMAIL, Stéphane GRELIER, Etienne GRAU
  • Patent number: 10829581
    Abstract: The invention relates to a curable resin that represents an excellent substitute for phenolic resins and is therefore able to replace phenolic resins in all applications in which they are used. Said resin is characterised in that it comprises: (1) at least one prepolymer resulting from the prepolymerisation of a compound A comprising at least one aromatic or heteroaromatic ring, a first group —O—CH2-C?CH and at least one second group selected from the groups —O—CH2-C?CH2 and —CH2-CH?CH2, said groups being carried by the at least one aromatic or heteroaromatic ring; and (2) a compound B comprising at least two thiol groups (—SH). The invention also relates to a material obtained by curing said curable resin, and in particular to an ablative composite material. The invention further relates to a material obtained by curing said curable resin.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: November 10, 2020
    Assignees: ARIANEGROUP SAS, UNIVERSITE DE REIMS CHAMPAGNE-ARDENNE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Bastien Rivieres, Brigitte Defoort, Cécile Lesamber, Xavier Coqueret
  • Patent number: 10745530
    Abstract: A sizing composition for reinforcing fibres is provided which makes it possible to improve the adhesion of these fibres with respect to an organic matrix that forms, with them, a part made of a composite material and that results from the chain transfer polymerization of a curable resin. The sizing composition includes a polybutadiene prepolymer comprising at least two epoxide functions, a cross-linking agent comprising at least two reactive functions, at least one of which is a thiol function; and a catalyst comprising at least one tertiary amine function.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: August 18, 2020
    Assignees: AIRBUS SAFRAN LAUNCHERS SAS, UNIVERSITE DE REIMS CHAMPAGNE-ARDENNE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Arnaud Martin, Brigitte Defoort, Xavier Coqueret
  • Patent number: 10323352
    Abstract: The invention relates to an aqueous impregnation bath for reinforcement fibers for manufacturing prepregs having a thermoplastic matrix, resulting in highly satisfactory consolidation, in terms of residual porosity, of the composite material parts manufactured using the prepregs. The impregnation bath includes a least one thermoplastic polymer, a surfactant and water, and is characterized in that the surfactant is an ethoxylated stearyl alcohol of formula: HO—(CH2—CH2—O)n—CH2—(CH2)16—CH3 wherein n is 100. The invention also relates to a method for impregnating reinforcement fibers using the impregnation bath, to a method for manufacturing a prepreg having a thermoplastic matrix using the impregnation method, and to a method for manufacturing a part made of a composite material having a thermoplastic matrix using the method for manufacturing a prepreg.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: June 18, 2019
    Assignee: ARIANEGROUP SAS
    Inventors: Mickaël Krzeminski, Brigitte Defoort, Maeliss Frisari, Amandine Flourez
  • Publication number: 20190040178
    Abstract: The invention relates to a curable resin that represents an excellent substitute for phenolic resins and is therefore able to replace phenolic resins in all applications in which they are used. Said resin is characterised in that it comprises: (1) at least one prepolymer resulting from the prepolymerisation of a compound A comprising at least one aromatic or heteroaromatic ring, a first group —O—CH2-C?CH and at least one second group selected from the groups —O—CH2-C?CH2 and —CH2-CH?CH2, said groups being carried by the at least one aromatic or heteroaromatic ring; and (2) a compound B comprising at least two thiol groups (—SH). The invention also relates to a material obtained by curing said curable resin, and in particular to an ablative composite material. The invention further relates to a material obtained by curing said curable resin.
    Type: Application
    Filed: January 26, 2017
    Publication date: February 7, 2019
    Inventors: Bastien Rivieres, Brigitte Defoort, Cécile Lesamber, Xavier Coqueret
  • Publication number: 20180119333
    Abstract: The invention relates to an aqueous impregnation bath for reinforcement fibres for manufacturing prepregs having a thermoplastic matrix, resulting in highly satisfactory consolidation, in terms of residual porosity, of the composite material parts manufactured using the prepregs. The impregnation bath includes a least one thermoplastic polymer, a surfactant and water, and is characterised in that the surfactant is an ethoxylated stearyl alcohol of formula: HO—(CH2—CH2—O)n—CH2—(CH2)16—CH3 wherein n is 100. The invention also relates to a method for impregnating reinforcement fibres using the impregnation bath, to a method for manufacturing a prepreg having a thermoplastic matrix using the impregnation method, and to a method for manufacturing a part made of a composite material having a thermoplastic matrix using the method for manufacturing a prepreg.
    Type: Application
    Filed: March 29, 2016
    Publication date: May 3, 2018
    Inventors: Mickaël KRZEMINSKI, Brigitte DEFOORT, Maeliss FRISARI, Amandine FLOUREZ
  • Patent number: 9937658
    Abstract: The invention concerns a method for producing, by welding, a link between an element made from any material, for example metal, and an element made from a thermoplastic-matrix composite material, the second element being produced by depositing a textile yarn pre-impregnated with a thermoplastic material on the surface of the first element. The method mainly includes an operation consisting of producing an interface coating consisting of an epoxy resin filled with a thermoplastic material powder, coating the surface of the element made from any material with same, and leaving the coating to polymerize. It next includes an operation consisting simultaneously of forming the second element and welding same to the coating deposited on the surface of the first element by locally heating the two elements, when depositing the pre-impregnated textile on the first element.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: April 10, 2018
    Assignee: AIRBUS DEFENCE AND SPACE SAS
    Inventors: Hélène Lebrun, Brigitte Defoort, Dominique Lacour, Audrey Menochet
  • Publication number: 20180094105
    Abstract: The invention relates to the use of giant micelles as shear-thinning agent in an aqueous dispersion of particles of at least one thermoplastic polymer. It also relates to an aqueous dispersion of particles of at least one thermoplastic polymer, comprising giant micelles located around the particles of the thermoplastic polymer(s), and also to a method that makes it possible to prepare this aqueous dispersion. Applications: all fields in which it is desirable to coat a substrate with a thermoplastic film and, in particular, the sizing of reinforcing fibres intended to be incorporated into the composition of parts made of thermoplastic matrix composite materials and, in particular, of structural parts for the aeronautical and space industries.
    Type: Application
    Filed: April 1, 2016
    Publication date: April 5, 2018
    Inventors: Brigitte Defoort, Aurélie Malho Rodrigues, Sophie Franceschi, Emile Perez
  • Publication number: 20160355645
    Abstract: A sizing composition for reinforcing fibres is provided which makes it possible to improve the adhesion of these fibres with respect to an organic matrix that forms, with them, a part made of a composite material and that results from the chain transfer polymerization of a curable resin. The sizing composition includes a polybutadiene prepolymer comprising at least two epoxide functions, a cross-linking agent comprising at least two reactive functions, at least one of which is a thiol function; and a catalyst comprising at least one tertiary amine function.
    Type: Application
    Filed: February 11, 2015
    Publication date: December 8, 2016
    Inventors: Arnaud Martin, Brigitte Defoort, Xavier Coqueret
  • Publication number: 20160264752
    Abstract: A composite material for manufacturing a device for containment of a cryogenic liquid and a device for containment of a cryogenic liquid which comprises at least one layer made of this composite material. The composite material is obtained from a composition comprising, in percentages by weight relative to the total weight of the composition: from 60% to 90% of a polyamide chosen from polyamides 6, 6.6 and 6/6.6 and mixtures thereof; from 10% to 30% of a primary synthetic graphite in the form of particles; and from 0% to 10% of an anti-oxidant. Applications: manufacture of cryogenic tanks and notably liquid oxygen tanks, particularly for a space launcher, manufacture of supply lines of cryogenic liquids and particularly liquid oxygen; manufacture of any device for the storage, transport and/or supply of a gas under pressure.
    Type: Application
    Filed: October 28, 2014
    Publication date: September 15, 2016
    Inventors: Julien L'INTERMY, Brigitte DEFOORT, Jannick DUCHET-RUMEAU, Jean-Francois GERARD
  • Patent number: 9381719
    Abstract: The invention relates to a method of assembling pre-impregnated plies by local isolated polymerization of the assembly region (30) under the action of a radiation to which the resin of the prepreg is sensitive. The assembly method makes it possible in particular to produce very large sized gossamer structures (7) in the form of a concertina-folded tube which is deployed by injecting pressurized gas once in space then stiffened by polymerization under the effect of the same radiation. The pylon concerned (7) thus comprises two structural elements (10, 20) secured end to end while at the same time maintaining its flexibility and firmness qualities.
    Type: Grant
    Filed: July 10, 2007
    Date of Patent: July 5, 2016
    Assignee: ASTRIUM SAS
    Inventors: Brigitte Defoort, Dominique Lacour, Olivier Le-Couls
  • Publication number: 20160031152
    Abstract: The invention concerns a method for producing, by welding, a link between an element made from any material, for example metal, and an element made from a thermoplastic-matrix composite material, the second element being produced by depositing a textile yarn pre-impregnated with a thermoplastic material on the surface of the first element. The method mainly includes an operation consisting of producing an interface coating consisting of an epoxy resin filled with a thermoplastic material powder, coating the surface of the element made from any material with same, and leaving the coating to polymerise. It next includes an operation consisting simultaneously of forming the second element and welding same to the coating deposited on the surface of the first element by locally heating the two elements, when depositing the pre-impregnated textile on the first element.
    Type: Application
    Filed: March 26, 2014
    Publication date: February 4, 2016
    Inventors: Hélène LEBRUN, Brigitte DEFOORT, Dominique LACOUR, Audrey MENOCHET
  • Patent number: 9051408
    Abstract: A curable composition, and a material obtained by curing the composition, in which the curable composition includes a vinylester polymerisable compound, jointly with a sulphonated polyaromatic thermoplastic polymer, and an N-vinyl lactam, and which is characterised in that it further includes, a first non-vinylester polymerisable compound which includes at least one isocyanurate group bearing at least two (meth)acrylate groups; and a second non-vinylester polymerisable compound which includes at least one carbopolycyclic or heteropolycyclic group bearing at least two (meth)acrylate groups.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: June 9, 2015
    Assignees: Astrium SAS, Universite De Reims Champagne-Ardenne, Centre National De La Recherche Scientifique
    Inventors: Xavier Coqueret, Mickael Krzeminski, Brigitte Defoort
  • Publication number: 20140336341
    Abstract: A curable composition, and a material obtained by curing the composition, in which the curable composition includes a vinylester polymerisable compound, jointly with a sulphonated polyaromatic thermoplastic polymer, and an N-vinyl lactam, and which is characterised in that it further includes, a first non-vinylester polymerisable compound which includes at least one isocyanurate group bearing at least two (meth)acrylate groups; and a second non-vinylester polymerisable compound which includes at least one carbopolycyclic or heteropolycyclic group bearing at least two (meth)acrylate groups.
    Type: Application
    Filed: December 4, 2012
    Publication date: November 13, 2014
    Inventors: Xavier Coqueret, Mickael Krzeminski, Brigitte Defoort
  • Patent number: 8618186
    Abstract: A method increases the toughness of a material obtained by curing a composition that includes at least one vinyl ester monomer. The method includes the incorporation into the composition of a sulfonated polyaromatic thermoplastic polymer, which is achieved by dissolving the vinyl ester monomer and the thermoplastic polymer in a reactive diluent in which they are both soluble. The resulting curable composition includes at least one vinyl ester monomer, and very high toughness materials can be made from it. A curable composition can include at least one vinyl ester monomer, a sulfonated polyaromatic thermoplastic polymer and a N-vinyl lactam. The compositions can be used in the aeronautical, space, railway, nautical, automotive industries, arms and other industries.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: December 31, 2013
    Assignees: Astrium SAS, Universite de Reims Champagne-Ardenne, Centre National de la Recherche Scientifique
    Inventors: Mickael Krzeminski, Brigitte Defoort, Xavier Coqueret
  • Patent number: 8399064
    Abstract: The invention relates to a process for improving the adhesion of carbon fibers by coating a surface of the carbon fibers with a polymer film containing functional groups capable of acting as chain transfer agents during a chain transfer polymerization of a resin curable by chain transfer polymerization to obtain coated carbon fibers. The coated carbon fibers are then contacted with the curable resin, and the chain transfer polymerization of the curable resin is induced to produce an organic matrix and forming a composite material. The functional groups of the polymer film act as chain transfer agents during the chain transfer polymerization of the curable resin and thereby improve adhesion of the carbon fibers to the organic matrix. Applications of this invention include aeronautical, aerospatial, shipbuilding, railway and motor vehicle industries, armaments industry, sports and leisure articles, and the like.
    Type: Grant
    Filed: December 10, 2007
    Date of Patent: March 19, 2013
    Assignee: Astrium SAS
    Inventors: Jacques Schultz, Michel Nardin, Frédéric Vautard, Vincent Roucoules, Brigitte Defoort
  • Patent number: 8328977
    Abstract: The invention relates to a process for improving the adhesion of carbon fibres with regard to an organic matrix forming a composite material with these fibres, this composite material being obtained by bringing the fibres into contact with a resin which can be cured by chain polymerization and then polymerizing the resin, which process is characterized in that it comprises the grafting, to the surface of the fibres, before they are brought into contact with the resin, of groups capable of acting as chain transfer agents during the polymerization of said resin. Fields of application: aeronautical, aerospatial, railway, ship building and automobile industries but also the armaments industry, the industry of sports and leisure articles, and the like.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: December 11, 2012
    Assignees: Astrium SAS, Universite des Sciences et Technologies de Lille
    Inventors: Brigitte Defoort, Philippe Ponsaud, Xavier Coqueret