Patents by Inventor Antoine Debuigne

Antoine Debuigne 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: 11261270
    Abstract: A polyvinyl alcohol has a number-average molecular weight (Mn) from 4,400 to 440,000, a molecular weight distribution (Mw/Mn) from 1.05 to 1.70, a degree of saponification from 80 to 99.99 mol %, wherein the polyvinyl alcohol contains an end group represented by a formula (I) below, and a molar ratio (X) of the end group based on total monomer units and the number-average molecular weight (Mn) satisfy a formula (1) below. Such a polyvinyl alcohol has a narrow molecular weight distribution and a high number-average molecular weight with hue good. (In the formula, R1 denotes an optionally substituted aromatic group having a carbon number from 6 to 20, and R2 denotes a hydrogen atom, an alkyl group having a carbon number from 1 to 20, or an optionally substituted aromatic group having a carbon number from 6 to 20.) X·Mn/44?0.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: March 1, 2022
    Assignees: KURARAY CO., LTD., UNIVERSITE DE LIEGE
    Inventors: Takumi Takayama, Kazuhiko Maekawa, Christophe Detrembleur, Antoine Debuigne, Christine Jerome
  • Publication number: 20210087321
    Abstract: Preparation of a block copolymer comprising a polyethylene block and a block formed of the polymerization of one or more vinyl monomers, at least 50 mol % of which being selected from the list consisting of ethylene, vinyl esters, non-conjugated N-vinyl monomers, acrylonitrile, (meth)acrylates and (meth)acrylamides, at least one of said one or more vinyl monomers not being ethylene, the process comprising: polymerizing ethylene or the one or more vinyl monomers in presence of an organic cobalt complex, thereby forming a macroinitiator; contacting the macroinitiator with either; the one or more vinyl monomers, if ethylene was polymerized in step a, or; ethylene, if the one or more vinyl monomers were polymerized in step a, thereby forming a second polymer block, and thereby forming the block copolymer, wherein forming the polyethylene block is performed under a pressure above 1 bar.
    Type: Application
    Filed: December 14, 2018
    Publication date: March 25, 2021
    Inventors: Christophe DETREMBLEUR, Jérémy DEMARTEAU, Antoine DEBUIGNE, Anthony KERMAGORET
  • Patent number: 10766978
    Abstract: A polyvinyl alcohol is produced in a method comprising: a polymerization step comprising polymerizing vinyl ester monomers by controlled radical polymerization in the presence of a radical initiator and an organic cobalt complex to obtain a polymer solution containing a polyvinyl ester; an extraction step comprising extracting a cobalt complex from the polymer solution by contacting an aqueous solution containing a water-soluble ligand with the polymer solution; and a saponification step comprising saponifying the polyvinyl ester after the extraction step to obtain a polyvinyl alcohol. A method for producing a polyvinyl alcohol is thus provided that has a narrow molecular weight distribution and a high number-average molecular weight with good hue and further good solubility in water.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: September 8, 2020
    Assignees: KURARAY CO., LTD., UNIVERSITE DE LIEGE
    Inventors: Takumi Takayama, Yusuke Amano, Kazuhiko Maekawa, Christophe Detrembleur, Antoine Debuigne, Christine Jerome
  • Publication number: 20200216584
    Abstract: A polyvinyl alcohol has a number-average molecular weight (Mn) from 4,400 to 440,000, a molecular weight distribution (Mw/Mn) from 1.05 to 1.70, a degree of saponification from 80 to 99.99 mol %, wherein the polyvinyl alcohol contains an end group represented by a formula (I) below, and a molar ratio (X) of the end group based on total monomer units and the number-average molecular weight (Mn) satisfy a formula (1) below. Such a polyvinyl alcohol has a narrow molecular weight distribution and a high number-average molecular weight with hue good. (In the formula, R1 denotes an optionally substituted aromatic group having a carbon number from 6 to 20, and R2 denotes a hydrogen atom, an alkyl group having a carbon number from 1 to 20, or an optionally substituted aromatic group having a carbon number from 6 to 20.) X·Mn/44?0.
    Type: Application
    Filed: July 11, 2018
    Publication date: July 9, 2020
    Applicants: KURARAY CO., LTD., UNIVERSITE DE LIEGE
    Inventors: Takumi TAKAYAMA, Kazuhiko MAEKAWA, Christophe DETREMBLEUR, Antoine DEBUIGNE, Christine JEROME
  • Publication number: 20190119414
    Abstract: A polyvinyl alcohol is produced in a method comprising: a polymerization step comprising polymerizing vinyl ester monomers by controlled radical polymerization in the presence of a radical initiator and an organic cobalt complex to obtain a polymer solution containing a polyvinyl ester; an extraction step comprising extracting a cobalt complex from the polymer solution by contacting an aqueous solution containing a water-soluble ligand with the polymer solution; and a saponification step comprising saponifying the polyvinyl ester after the extraction step to obtain a polyvinyl alcohol. A method for producing a polyvinyl alcohol is thus provided that has a narrow molecular weight distribution and a high number-average molecular weight with good hue and further good solubility in water.
    Type: Application
    Filed: March 30, 2017
    Publication date: April 25, 2019
    Applicants: KURARAY CO., LTD., UNIVERSITE DE LIEGE
    Inventors: Takumi TAKAYAMA, Yusuke AMANO, Kazuhiko MAEKAWA, Christophe DETREMBLEUR, Antoine DEBUIGNE, Christine JEROME
  • Publication number: 20130261267
    Abstract: Process for the preparation of a halogenated polymer comprising a controlled radical polymerization step of at least one monomer containing at least one halogen-carbon bond, performed in the presence of an organo-cobalt complex, said polymerization step being further carried out in non-isotherm conditions.
    Type: Application
    Filed: December 6, 2011
    Publication date: October 3, 2013
    Applicant: Universite De Liege
    Inventors: Vincent Bodart, Yasmine Piette, Christophe Detrembleur, Antoine Debuigne, Christine Jerome