Patents by Inventor Christian Jehn-Rendu

Christian Jehn-Rendu 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: 11306441
    Abstract: The present invention concerns a composition being an inverse emulsion comprising cross-linked anionic, organic polymeric microparticles, said microparticles having an unswollen z-average particle size diameter of less than 0.75 ?m, wherein the organic polymeric microparticles are formed from a monomer mixture comprising (a) an ethylenically unsaturated carboxylic acid, or a salt thereof; (b) an ethylenically unsaturated non-ionic monomer; and (c) from 1 to 10 mole % of 2-acrylamido-2-methylpropanesulphonic acid, or a salt thereof. The invention also provides a process for preparing the composition, the use of the composition in a paper or paperboard making process and methods of making paper or paperboard employing said composition.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: April 19, 2022
    Assignee: Solenis Technologies, L.P.
    Inventors: Christian Jehn-Rendu, Anja Thomas, Rosa Corberan Roc
  • Patent number: 10975525
    Abstract: Finely divided, cationic, aqueous polymer dispersion which is obtainable by emulsion polymerisation of ethylenically unsaturated monomers in an aqueous liquid containing a cationic prepolymer as a dispersant, wherein the cationic prepolymer is prepared in the presence of at least one polymerisation initiator by polymerisation of (a) from 15 to 45% by weight of at least one ethylenically unsaturated monomer comprising at least one quaternary ammonium group; (b) from 5 to 80% by weight of at least one optionally substituted styrene; (c) from 0 to 50% by weight of at least one C 1-12 alkyl (meth) acrylate; (d) from 0 to 10% by weight of at least one ethylenically unsaturated monomer comprising an acid group; (e) from 0 to 10% by weight of at least one ethylenically unsaturated monomer comprising an amine group; and (f) from 0 to 20% by weight of at least one non-ionic ethylenically unsaturated monomer differing from (b), (c) and (e), the sum of (a)+(b)+(c)+(d)+(e)+(f) being 100% by weight, in a first emulsion po
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: April 13, 2021
    Assignee: SOLENIS TECHNOLOGIES, L.P.
    Inventors: Carmen-Elena Cimpeanu, Klaus Moeller, Petra Arnold, Kristina Georgieva, Reinhold Dieing, Christian Jehn-Rendu, Quan Wen
  • Publication number: 20200217015
    Abstract: The present invention concerns a composition being an inverse emulsion comprising cross-linked anionic, organic polymeric microparticles, said microparticles having an unswollen z-average particle size diameter of less than 0.75 ?m, wherein the organic polymeric microparticles are formed from a monomer mixture comprising (a) an ethylenically unsaturated carboxylic acid, or a salt thereof; (b) an ethylenically unsaturated non-ionic monomer; and (c) from 1 to 10 mole % of 2-acrylamido-2-methylpropanesulphonic acid, or a salt thereof. The invention also provides a process for preparing the composition, the use of the composition in a paper or paperboard making process and methods of making paper or paperboard employing said composition.
    Type: Application
    Filed: September 7, 2018
    Publication date: July 9, 2020
    Applicant: SOLENIS TECHNOLOGIES CAYMAN, L.P.
    Inventors: Christian JEHN-RENDU, Anja THOMAS, Rosa CORBERAN ROC
  • Publication number: 20180355558
    Abstract: Finely divided, cationic, aqueous polymer dispersion which is obtainable by emulsion polymerisation of ethylenically unsaturated monomers in an aqueous liquid containing a cationic prepolymer as a dispersant, wherein the cationic prepolymer is prepared in the presence of at least one polymerisation initiator by polymerisation of (a) from 15 to 45% by weight of at least one ethylenically unsaturated monomer comprising at least one quaternary ammonium group; (b) from 5 to 80% by weight of at least one optionally substituted styrene; (c) from 0 to 50% by weight of at least one C 1-12 alkyl (meth) acrylate; (d) from 0 to 10% by weight of at least one ethylenically unsaturated monomer comprising an acid group; (e) from 0 to 10% by weight of at least one ethylenically unsaturated monomer comprising an amine group; and (f) from 0 to 20% by weight of at least one non-ionic ethylenically unsaturated monomer differing from (b), (c) and (e), the sum of (a)+(b)+(c)+(d)+(e)+(f) being 100% by weight, in a first emulsion po
    Type: Application
    Filed: December 1, 2016
    Publication date: December 13, 2018
    Applicant: BASF SE
    Inventors: Carmen-Elena CIMPEANU, Klaus MOELLER, Petra ARNOLD, Kristina GEORGIEVA, Reinhold DIEING, Christian JEHN-RENDU, Quan WEN
  • Patent number: 10113270
    Abstract: Process for the Manufacture of Paper and Paperboard The present invention relates to a process of making paper or paperboard in which a cellulosic thin stock is provided and subjected to one or more shear stages and then drained and a moving screen to form a sheet which is dried, wherein the process employs a retention system which is applied to the thin stock, said retention system comprising as components i) a blend of different cationic polymers and ii) a microparticulate material, in which the blend of cationic polymers comprises, a) a cationic polymer having a charge density of from 0.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: October 30, 2018
    Assignee: BASF SE
    Inventors: Christopher Alan Gray, Antonius Moormann-Schmitz, Hubert Meixner, Luis Miguel Sanchez Cerro, Thomas Muehlenbernd, Christian Jehn-Rendu
  • Publication number: 20170166741
    Abstract: The invention relates to a finely divided, starch-containing aqueous polymer dispersion which is obtainable by free radical emulsion polymerization of ethylenically unsaturated monomers in the presence of at least one redox initiator and starch, wherein the ethylenically unsaturated monomers comprise (a) from 30 to 65% by weight of acrylonitrile and/or methacrylonitrile, (b) from 35 to 60% by weight of at least one C1-C12-alkyl acrylate and/or at least one C1-C12-alkyl methacrylate, (c) from 0 to 35% by weight of at least one other ethylenically unsaturated copolymerisable monomer, in which the sum of (a), (b) and (c) totals 100%, and in which the aqueous polymer dispersion comprises, (d) from 10 to 55% by weight of an ionic tapioca starch, in which the weight of (d) is based on the total solids of components (a), (b), (c) and (d) of the aqueous polymer dispersion.
    Type: Application
    Filed: July 2, 2015
    Publication date: June 15, 2017
    Applicant: BASF SE
    Inventors: Titus David LEMAN, Christian JEHN-RENDU, Holger KERN, Syarief B CAHYANA
  • Patent number: 9567710
    Abstract: A pulp making process in which fibrous cellulosic material is pulped to form an aqueous suspension of cellulosic material, the suspension is drained through a screen to form a pulp sheet and that the pulp sheet is dried to form a dry market pulp, in which a water soluble cationic polymer is added to the suspension as the sole drainage aid wherein the water-soluble cationic polymer is either, i) a copolymer comprising (a) between 1 and 70 mole % (meth) acrylamide and (b) between 30 and 99 mole % (meth) acryloyloxyethyltrimethyl ammonium chloride with an intrinsic viscosity between 5 and 9 dl/g; or ii) a hydrolysed homopolymer of vinylformamide comprising between 1 and 100 mole % vinyl amine units and having a K value of between 45 and 240. The process of the invention provides improved drainage time and solids content of the dewatered pulp.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: February 14, 2017
    Assignee: BASF SE
    Inventors: Christian Jehn-Rendu, Joachim Hege, Detlef Kannengiesser
  • Patent number: 9404223
    Abstract: The present invention relates to a process of making paper or paperboard in which a cellulosic thin stock is provided and subjected to one or more shear stages and then drained and a moving screen to form a sheet which is dried, wherein the process employs a retention system which is applied to the thin stock, said retention system comprising as components i) a blend of different cationic polymers and ii) a microparticulate material, in which the blend of cationic polymers comprises, a) a cationic polymer having a charge density of at least 3 mEq per gram and a molar mass of greater than 700,000 Da, b) a cationic polymer having a charge density of below 3 mEq per gram and an intrinsic viscosity of at least 3 dl/g, wherein one of the components of the retention system is dosed into the thin stock after the final shearing stage and the other is dosed into the thin stock before the final shearing stage.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: August 2, 2016
    Assignee: BASF SE
    Inventors: Christopher Alan Gray, Antonius Moormann-Schmitz, Hubert Meixner, Luis Miguel Sanchez Cerro, Christian Jehn-Rendu, Thomas Muehlenbernd
  • Publication number: 20150345081
    Abstract: Process for the Manufacture of Paper and Paperboard The present invention relates to a process of making paper or paperboard in which a cellulosic thin stock is provided and subjected to one or more shear stages and then drained and a moving screen to form a sheet which is dried, wherein the process employs a retention system which is applied to the thin stock, said retention system comprising as components i) a blend of different cationic polymers and ii) a microparticulate material, in which the blend of cationic polymers comprises, a) a cationic polymer having a charge density of from 0.
    Type: Application
    Filed: January 9, 2014
    Publication date: December 3, 2015
    Applicant: BASF SE
    Inventors: Christopher Alan GRAY, Antonius MOORMANN-SCHMITZ, Hubert MEIXNER, Luis Miguel SANCHEZ CERRO, Thomas MUEHLENBERND, Christian JEHN-RENDU
  • Patent number: 9103071
    Abstract: The present invention relates to a process of making paper or paperboard, the process including introducing a dual retention system into a cellulosic thin stock, subjecting the cellulosic thin stock to one or more shear stages, and then draining the cellulosic thin stock on a moving screen to form a dried sheet, wherein the dual retention system consists of a first polymeric retention aid and a second polymeric retention aid, the first polymeric retention aid is a water-soluble cationic polymer exhibiting an intrinsic viscosity of at least 6 dl/g, the second polymeric retention aid is a water-soluble cationic polymer exhibiting an intrinsic viscosity of from 4 to 9 dl/g, and the second polymeric retention aid has a greater cationic charge density than the first polymeric retention aid.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: August 11, 2015
    Assignee: BASF SE
    Inventor: Christian Jehn-Rendu
  • Publication number: 20150027651
    Abstract: A pulp making process in which fibrous cellulosic material is pulped to form an aqueous suspension of cellulosic material, the suspension is drained through a screen to form a pulp sheet and that the pulp sheet is dried to form a dry market pulp, in which a water soluble cationic polymer is added to the suspension as the sole drainage aid wherein the water-soluble cationic polymer is either, i) a copolymer comprising (a) between 1 and 70 mole % (meth) acrylamide and (b) between 30 and 99 mole % (meth) acryloyloxyethyltrimethyl ammonium chloride with an intrinsic viscosity between 5 and 9 dl/g; or ii) a hydrolysed homopolymer of vinylformamide comprising between 1 and 100 mole % vinyl amine units and having a K value of between 45 and 240. The process of the invention provides improved drainage time and solids content of the dewatered pulp.
    Type: Application
    Filed: August 6, 2014
    Publication date: January 29, 2015
    Applicant: BASF SE
    Inventors: Christian JEHN-RENDU, Joachim Hege, Detlef Kannengiesser
  • Patent number: 8926797
    Abstract: Process for the production of paper, board and cardboard having high dry strength by addition of (a) at least one trivalent cation in the form of a salt, (b) at least one water-soluble cationic polymer and (c) at least one water-soluble amphoteric polymer to the paper stock, draining of the paper stock with sheet formation and subsequent drying of the paper products, the water-soluble cationic polymer (b) being selected from the group consisting of the (i) polymers comprising vinylamine units and (ii) polymers comprising ethylenimine units.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: January 6, 2015
    Assignee: BASF SE
    Inventors: Christian Jehn-Rendu, Ellen Krueger, Hans-Joachim Haehnle, Martin Ruebenacker, Norbert Schall, Thomas Muehlenbernd
  • Patent number: 8916026
    Abstract: A pulp making process in which fibrous cellulosic material is pulped to form an aqueous suspension of cellulosic material, the suspension is drained through a screen to form a pulp sheet and that the pulp sheet is dried to form a dry market pulp, in which a water soluble cationic polymer is added to the suspension as the sole drainage aid wherein the water-soluble cationic polymer is either, i) a copolymer comprising (a) between 1 and 70 mole % (meth)acrylamide and (b) between 30 and 99 mole % (meth)acryloyloxyethyl-trimethyl ammonium chloride with an intrinsic viscosity between 5 and 9 dl/g; or ii) a hydrolysed homopolymer of vinylformamide comprising between 1 and 100 mole % vinyl amine units and having a K value of between 45 and 240. The process of the invention provides improved drainage time and solids content of the dewatered pulp.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: December 23, 2014
    Assignee: BASF SE
    Inventors: Christian Jehn-Rendu, Joachim Hege, Detlef Kannengieβer
  • Publication number: 20140367059
    Abstract: The present invention relates to a process of making paper or paperboard in which a cellulosic thin stock is provided and subjected to one or more shear stages and then drained and a moving screen to form a sheet which is dried, wherein the process employs a retention system which is applied to the thin stock, said retention system comprising as components i) a blend of different cationic polymers and ii) a microparticulate material, in which the blend of cationic polymers comprises, a) a cationic polymer having a charge density of at least 3 mEq per gram and a molar mass of greater than 700,000 Da, b) a cationic polymer having a charge density of below 3 mEq per gram and an intrinsic viscosity of at least 3 dl/g, wherein one of the components of the retention system is dosed into the thin stock after the final shearing stage and the other is dosed into the thin stock before the final shearing stage.
    Type: Application
    Filed: January 31, 2013
    Publication date: December 18, 2014
    Applicant: BASF SE
    Inventors: Christopher Alan Gray, Antonius Moormann-Schmitz, Hubert Meixner, Luis Miguel Sanchez Cerro, Christian Jehn-Rendu, Thomas Muehlenbernd
  • Patent number: 8877009
    Abstract: A pulp making process in which fibrous cellulosic material is pulped to form an aqueous suspension of cellulosic material, the suspension is drained through a screen to form a pulp sheet and that the pulp sheet is dried to form a dry market pulp, in which a water soluble cationic polymer is added to the suspension as the sole drainage aid wherein the water-soluble cationic polymer is either, i) a copolymer comprising (a) between 1 and 70 mole % (meth)acrylamide and (b) between 30 and 99 mole % (meth)acryloyloxyethyl-trimethyl ammonium chloride with an intrinsic viscosity between 5 and 9 dl/g; or ii) a hydrolysed homopolymer of vinylformamide comprising between 1 and 100 mole % vinyl amine units and having a K value of between 45 and 240. The process of the invention provides improved drainage time and solids content of the dewatered pulp.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: November 4, 2014
    Assignee: BASF SE
    Inventors: Christian Jehn-Rendu, Joachim Hege, Detlef Kannengieβer
  • Publication number: 20140124155
    Abstract: The process of the present invention concerns manufacturing paper and paperboard employing two polymeric retention aids. These two polymeric retention aids should be added to the low consistency suspension, often referred to as the thin stock. The first polymeric retention aid is a water-soluble cationic polymer exhibiting an intrinsic viscosity of at least 6 dl/g. The second polymeric retention aid is a water-soluble cationic polymer exhibiting an intrinsic viscosity of between 4 and 9 dl/g. The cationic charge density of the second polymeric retention aid should be higher than that of the first polymeric retention aid. The process is particularly suitable for the manufacture of fine paper or multiply packaging paper which often contains filler.
    Type: Application
    Filed: June 20, 2012
    Publication date: May 8, 2014
    Applicant: BASF SE
    Inventor: Christian Jehn-Rendu
  • Patent number: 8597467
    Abstract: A cationic copolymer is obtained by the Hofmann rearrangement (also referred to as the Hofmann degradation reaction) in aqueous solution in the presence of an alkaline-earth and/or alkali hydroxide and an alkaline-earth and/or alkaline hypohalide, on a base copolymer comprising at least one nonionic monomer selected from the group comprising acrylamide (and/or methacrylamide), N,N-dimethylacrylamide and/or acrylonitrile The copolymer is branched after the Hofmann rearrangement, in the presence of at least one polyfunctional branching agent, and is soluble in water.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: December 3, 2013
    Assignee: S.P.C.M. SA
    Inventors: Christian Jehn-Rendu, Rene Hund, Muttalif Duong
  • Publication number: 20130306257
    Abstract: A pulp making process in which fibrous cellulosic material is pulped to form an aqueous suspension of cellulosic material, the suspension is drained through a screen to form a pulp sheet and that the pulp sheet is dried to form a dry market pulp, in which a water soluble cationic polymer is added to the suspension as the sole drainage aid wherein the water-soluble cationic polymer is either, i) a copolymer comprising (a) between 1 and 70 mole % (meth) acrylamide and (b) between 30 and 99 mole % (meth) acryloyloxyethyl-trimethyl ammonium chloride with an intrinsic viscosity between 5 and 9 dl/g; or ii) a hydrolysed homopolymer of vinylformamide comprising between 1 and 100 mole % vinyl amine units and having a K value of between 45 and 240. The process of the invention provides improved drainage time and solids content of the dewatered pulp.
    Type: Application
    Filed: November 14, 2011
    Publication date: November 21, 2013
    Applicant: BASF SE
    Inventors: Christian Jehn-Rendu, Joachim Hege, Detlef Kannengießer
  • Patent number: 8454799
    Abstract: The present invention relates to a novel pulp composition for paper or solid board production comprising an oxidized recovered paper pulp and/or an oxidized mechanical pulp into which from 1 to 500 mmol of carboxyl groups per kg and from 1 to 200 mmol of aldehyde groups per kg have been introduced by oxidation. The invention also relates to paper and solid board based on such a pulp composition and also to a process for producing such paper or solid board. The invention also relates to the use of oxidized recovered paper pulp and/or oxidized mechanical pulp for improving the retention and drainage properties of a pulp suitable for producing paper or solid board. The invention further relates to the use of oxidized recovered paper pulp and/or oxidized mechanical pulp for improving, i.e., increasing, the dry strength of paper and solid board.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: June 4, 2013
    Assignee: BASF SE
    Inventors: Christian Jehn-Rendu, Hans-Georg Lemaire, Oliver Koch, Tilo Habicher, Sylke Haremza, Markus Hoffmann
  • Patent number: 8404083
    Abstract: Process for the production of paper, board and cardboard having high dry strength by addition of at least one water-soluble (a) polymer comprising vinylamine units and at least one (b) polymer comprising ethylenimine units and at least one water-soluble polymeric anionic compound to a paper stock, draining of the paper stock with sheet formation and drying of the paper products, the water-soluble cationic polymers (a) and (b) being metered in any sequence or as a mixture into a paper stock, and papers which are obtainable by this process.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: March 26, 2013
    Assignee: BASF SE
    Inventors: Hans-Joachim Haehnle, Christian Jehn-Rendu, Rainer Blum, Ellen Krueger, Norbert Schall, Martin Ruebenacker