Patents by Inventor Rene Hund

Rene Hund 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: 20220356650
    Abstract: This invention relates to a method for manufacturing a sheet of paper or cardboard, according to which, before forming said sheet, at least one N-vinylformamide polymer that is partially hydrolyzed in the form of an inverse emulsion is added, at one or more injection points, to a fibrous suspension in the presence of an anti-gelling agent, and having a cationic regain between 30 and 150%, the inverse emulsion having a weight ratio of partially hydrolyzed N-vinylformamide polymer to anti-gelling agent in the range between 1,000,000/5000 and 1,000,000/50,000.
    Type: Application
    Filed: May 7, 2020
    Publication date: November 10, 2022
    Applicant: SPCM SA
    Inventors: Cyril BARRIERE, Rémi OLIVIER, René HUND
  • Publication number: 20220162803
    Abstract: This method for treating the surface of paper and/or one of the layers thereof, comprises the following successive steps: i) Supplying an aqueous suspension S of polysaccharide; ii) Supplying an aqueous dispersion D comprising (a) particles of at least one anionic water-swellable polymer P and (b) at least one compound selected from a mineral salt, an organic salt, an organic dispersing polymer and the mixtures thereof; iii) Mixing the suspension S and the dispersion D to obtain a mixture M; iv) Applying the mixture M to the surface of the paper and/or to at least one of the layers thereof.
    Type: Application
    Filed: March 13, 2020
    Publication date: May 26, 2022
    Inventors: Gatien FAUCHER, Damien FOUGEROUSE, René HUND
  • Publication number: 20210140111
    Abstract: The present invention relates to a complex of polymers and to the use thereof in a method of making paper, cardboard or the like. This complex of polymers is obtained by polymerizing water-soluble monomers: in the presence of a host polymer that comprises vinylamine functions and of a non-polymeric transfer agent, and in the absence of a branching or crosslinking agent of the ethylenic polyfunctional type. It is obtained as from a mass ratio of anionic monomer to water that is greater than 0.035.
    Type: Application
    Filed: May 7, 2019
    Publication date: May 13, 2021
    Applicant: S.P.C.M. SA
    Inventors: Gatien FAUCHER, Damien FOUGEROUSE, René HUND
  • Publication number: 20210102008
    Abstract: The invention relates to a method for producing anionic polymers that are hydrosoluble in an aqueous solution, comprising at least the following successive steps: b) polymerisation, in an aqueous solution, of anionic monomers containing at least 5 mol % of 2-acrylamido-2-methylpropane sulfonic acid and/or one of the salts thereof and optionally non-ionic monomers up to a mass concentration of polymer A of between 5 and 40%, b) addition of at least one aldehyde into the solution produced in step a), and c) acidification to a pH of between 3 and 4 of the solution produced in step b). The invention also relates to the use thereof in a paper-making method.
    Type: Application
    Filed: March 29, 2019
    Publication date: April 8, 2021
    Inventors: René HUND, Cyril BARRIERE, Rémi OLIVIER
  • Publication number: 20200325263
    Abstract: This invention relates to an additive based on (co)polymers resulting from the reaction between at least one dialdehyde compound and at least one complex (co)polymer obtained by polymerization of water-soluble monomers in the presence of at least one host (co)polymer comprising vinylamine functions.
    Type: Application
    Filed: April 8, 2020
    Publication date: October 15, 2020
    Applicant: S.P.C.M. SA
    Inventors: René HUND, Gatien FAUCHER, Damien FOUGEROUSE
  • Patent number: 10689809
    Abstract: The present invention relates to a process for manufacturing a sheet of paper and/or board from a fibrous suspension, according to which, before the formation of said sheet, added to the fibrous suspension, at one or more injection points, are at least two retention aids respectively: (a) at least one water-soluble organic cationic polymer P1 having a cationicity greater than 2 meq·g?1, and (b) at least one water-soluble amphoteric polymer P2 of at least one anionic monomer and of at least one cationic monomer. The polymer P2 is added to the fibrous suspension after dissolving, in aqueous solution, the polymer P2 previously obtained by one of the following polymerization techniques: gel polymerization, suspension polymerization, inverse emulsion polymerization, dispersion polymerization. The polymer P2 has a factor F>2, said factor F being defined by the formula: F=UL2×[(100?A)/(100?C)] with UL: Brookfield viscosity of the polymer P2 at 0.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: June 23, 2020
    Assignee: S.P.C.M. SA
    Inventors: Gatien Faucher, Damien Fougerouse, René Hund
  • Publication number: 20190048530
    Abstract: The present invention relates to a process for manufacturing a sheet of paper and/or board from a fibrous suspension, according to which, before the formation of said sheet, added to the fibrous suspension, at one or more injection points, are at least two retention aids respectively: (a) at least one water-soluble organic cationic polymer P1 having a cationicity greater than 2 meq·g?1, and (b) at least one water-soluble amphoteric polymer P2 of at least one anionic monomer and of at least one cationic monomer. The polymer P2 is added to the fibrous suspension after dissolving, in aqueous solution, the polymer P2 previously obtained by one of the following polymerization techniques: gel polymerization, suspension polymerization, inverse emulsion polymerization, dispersion polymerization. The polymer P2 has a factor F>2, said factor F being defined by the formula: F=UL2×[(100?A)/(100?C)] with UL: Brookfield viscosity of the polymer P2 at 0.
    Type: Application
    Filed: January 25, 2017
    Publication date: February 14, 2019
    Applicant: S.P.C.M. SA
    Inventors: Gatien FAUCHER, Damien FOUGEROUSE, René HUND
  • Patent number: 10132039
    Abstract: Process for manufacturing a sheet of paper and/or of paperboard and the like, according to which, the cellulosic material is brought into contact with at least one dry strength aid, characterized in that said dry strength aid is a cationic or amphoteric (co)polymer derived from the reaction between at least one aldehyde and at least one base (co)polymer comprising at least one nonionic monomer, said base copolymer being modified with at least one polyfunctional compound comprising at least three heteroatoms chosen from N, S, O and P, in which at least three of these heteroatoms each have at least one mobile hydrogen.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: November 20, 2018
    Assignee: S.P.C.M SA
    Inventors: René Hund, Cyril Barriere
  • Patent number: 9725532
    Abstract: The present invention relates to a process for the preparation of an aqueous polymer solution containing at least one cationic or amphoteric (co)polymer, comprising the following steps: Hofmann degradation reaction on a (co)polymer based on at least one non-ionic monomer chosen from the group including acrylamide, methacrylamide, N,N-dimethylacrylamide, and acrylonitrile; post-processing of the resulting aqueous polymer solution of viscosity V1; characterized in that the post processing comprises the following successive steps: obtaining of an aqueous polymer solution containing at least one cationic or amphoteric (co)polymer derived from the Hofmann degradation reaction; post-processing of this aqueous polymer solution; characterized in that the post processing comprises the following successive steps: (a) adjustment of the pH of the aqueous polymer solution to a value greater than or equal to 5.5; (b) decrease of the pH of the aqueous polymer solution to a value between 2 and 5.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: August 8, 2017
    Assignee: S.P.C.M. SA
    Inventors: René Hund, Christophe Auriant, Laurent Mialon
  • Publication number: 20170037575
    Abstract: Process for manufacturing a sheet of paper and/or of paperboard and the like, according to which, the cellulosic material is brought into contact with at least one dry strength aid, characterized in that said dry strength aid is a cationic or amphoteric (co)polymer derived from the reaction between at least one aldehyde and at least one base (co)polymer comprising at least one nonionic monomer, said base copolymer being modified with at least one polyfunctional compound comprising at least three heteroatoms chosen from N, S, O and P, in which at least three of these heteroatoms each have at least one mobile hydrogen.
    Type: Application
    Filed: October 18, 2016
    Publication date: February 9, 2017
    Applicant: S.P.C.M. SA
    Inventors: René HUND, Cyril BARRIERE
  • Patent number: 9546246
    Abstract: Polymer complex obtained by polymerization of water-soluble monomers: in the presence of a host polymer comprising vinylamine functions and of a non-polymeric transfer agent, and in the absence of branching or crosslinking agent of ethylenic polyfunctional type.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: January 17, 2017
    Assignee: S.P.C.M. SA
    Inventors: René Hund, Gatien Faucher, Damien Fougerousse
  • Patent number: 9506200
    Abstract: Process for manufacturing a sheet of paper and/or of paperboard and the like, according to which, the cellulosic material is brought into contact with at least one dry strength aid, characterized in that said dry strength aid is a cationic or amphoteric (co)polymer derived from the reaction between at least one aldehyde and at least one base (co)polymer comprising at least one nonionic monomer, said base copolymer being modified with at least one polyfunctional compound comprising at least three heteroatoms chosen from N, S, O and P, in which at least three of these heteroatoms each have at least one mobile hydrogen.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: November 29, 2016
    Assignee: S.P.C.M. SA
    Inventors: René Hund, Cyril Barriere
  • Publication number: 20160311940
    Abstract: The present invention relates to a process for the preparation of an aqueous polymer solution containing at least one cationic or amphoteric (co)polymer, comprising the following steps: Hofmann degradation reaction on a (co)polymer based on at least one non-ionic monomer chosen from the group including acrylamide, methacrylamide, N, N-dimethylacrylamide, and acrylonitrile; post-processing of the resulting aqueous polymer solution of viscosity V1; characterized in that the post processing comprises the following successive steps: obtaining of an aqueous polymer solution containing at least one cationic or amphoteric (co)polymer derived from the Hofmann degradation reaction; post-processing of this aqueous polymer solution; characterized in that the post processing comprises the following successive steps: (a) adjustment of the pH of the aqueous polymer solution to a value greater than or equal to 5.5; (b) decrease of the pH of the aqueous polymer solution to a value between 2 and 5.
    Type: Application
    Filed: January 15, 2015
    Publication date: October 27, 2016
    Applicant: S.P.C.M. SA
    Inventors: René HUND, Christophe AURIANT, Laurent MIALON
  • Patent number: 9303359
    Abstract: Process for manufacturing a sheet of paper and/or board, according to which, in a plant comprising a fan pump and a head box: a cellulose fiber suspension is prepared; the white waters are introduced into the thick stock; the mixture is homogenized in the fan pump; the thin stock is transferred to the head box; the sheet is formed and then dried, characterized in that, before homogenization of the mixture in the fan pump, a cationic copolymer obtained by Hofmann degradation reaction is introduced into the white waters and/or the thick stock and/or the mixture formed by the white waters and the thick stock.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: April 5, 2016
    Assignee: S.P.C.M SA
    Inventors: René Hund, Christophe Auriant
  • Publication number: 20150176208
    Abstract: Process for manufacturing a sheet of paper and/or board, according to which, in a plant comprising a fan pump and a head box: a cellulose fibre suspension is prepared; the white waters are introduced into the thick stock; the mixture is homogenized in the fan pump; the thin stock is transferred to the head box; the sheet is formed and then dried, characterized in that, before homogenization of the mixture in the fan pump, a cationic copolymer obtained by Hofmann degradation reaction is introduced into the white waters and/or the thick stock and/or the mixture formed by the white waters and the thick stock.
    Type: Application
    Filed: June 17, 2013
    Publication date: June 25, 2015
    Applicant: S.P.C.M. SA
    Inventors: René Hund, Christophe Auriant
  • Publication number: 20150136348
    Abstract: Process for manufacturing a sheet of paper and/or of paperboard and the like, according to which, the cellulosic material is brought into contact with at least one dry strength aid, characterized in that said dry strength aid is a cationic or amphoteric (co)polymer derived from the reaction between at least one aldehyde and at least one base (co)polymer comprising at least one nonionic monomer, said base copolymer being modified with at least one polyfunctional compound comprising at least three heteroatoms chosen from N, S, O and P, in which at least three of these heteroatoms each have at least one mobile hydrogen.
    Type: Application
    Filed: February 26, 2013
    Publication date: May 21, 2015
    Applicant: S.P.C.M. SA
    Inventors: René Hund, Cyril Barriere
  • Patent number: 8999112
    Abstract: A method for manufacturing a sheet of paper and/or board having improved retention and drainage properties is provided, according to which, before the formation of the sheet and/or board, at least two retention aids are added to the fibrous suspension. These two retention aids are a main retention aid corresponding to a (co)polymer having a cationic charge density above 2 meq/g, obtained by the Hofmann degradation reaction, and a secondary retention aid corresponding to a water-soluble or water-swellable polymer having an anionic charge density above 0.1 meq/g. The main retention aid is introduced into the fibrous suspension in a proportion of 100 to 800 g/t of dry pulp, and the secondary retention aid is introduced into the fibrous suspension in a proportion of 50 to 800 g/t of dry pulp and has an intrinsic viscosity IV above 3 dl/g.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: April 7, 2015
    Assignee: S.P.C.M. SA
    Inventors: Gatien Faucher, Rene Hund
  • Publication number: 20150053361
    Abstract: Polymer complex obtained by polymerization of water-soluble monomers: in the presence of a host polymer comprising vinylamine functions and of a non-polymeric transfer agent, and in the absence of branching or crosslinking agent of ethylenic polyfunctional type.
    Type: Application
    Filed: July 24, 2014
    Publication date: February 26, 2015
    Applicant: S.P.C.M. SA
    Inventors: René HUND, Gatien FAUCHER, Damien FOUGEROUSSE
  • Patent number: 8734616
    Abstract: Cationic or amphoteric (co)polymer obtained by Hofmann degradation reaction, in aqueous solution, in the presence of an alkaline-earth and/or alkali metal hydroxide and of an alkaline-earth and/or alkali metal hypohalide, on a base (co)polymer comprising at least one nonionic monomer chosen from the group comprising acrylamide (and/or methacrylamide) and N,N-dimethylacrylamide, is characterized in that the base (co)polymer is modified beforehand with at least one polyfunctional compound containing at least 3 heteroatoms chosen from N, S, O and P and each having at least one mobile hydrogen. Use as a flocculation, retention and/or drainage aid, and dry strength aid is contemplated.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: May 27, 2014
    Assignee: S.P.C.M. SA
    Inventors: René Hund, Christophe Auriant
  • Patent number: 8623966
    Abstract: In a process for preparing cationic or amphoteric (co)polymers derived from acrylamide by a Hofmann degradation reaction in aqueous solution in the presence of an alkali and/or alkaline-earth metal hydroxide and an alkali metal hypohalide on a base copolymer, a solution of base copolymer on which the reaction is performed contains a polyvalent cationic salt representing at least 0.5% by weight, preferably from 2 to 10% by weight of the base copolymer.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: January 7, 2014
    Assignee: S.P.C.M. SA
    Inventors: René Hund, Christophe Auriant