Patents by Inventor Britta Kohlstruk

Britta Kohlstruk 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: 11370876
    Abstract: The present invention relates to a low-alkylphenol composition comprising a) at least one epoxy resin, b) at least one amine having at least two secondary amino groups that are both part of an organic ring system, and c) at least one salt of a strong Brønsted acid with a counterion selected from metal ions, metal-containing ions, phosphonium ions and ammonium ions, to processes for production thereof and to the use thereof.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: June 28, 2022
    Assignee: Evonik Operations GmbH
    Inventors: Emmanouil Spyrou, Dirk Fuchsmann, Britta Kohlstruk, Annette Sandkühler
  • Patent number: 11359048
    Abstract: The present invention provides a composition comprising a) at least one epoxy resin, b) at least one cyclic amine of the formula (I) in which R1 to R4 is H or an organic radical, with the proviso that at least one of the R1, R2, R3 and R4 radicals ?H, and X?—(Y1)m-(A1)n-(Y2)o-(A2)p-(Y3)q-(A3)r-(Y4)s—??(II) where, independently of one another, m, n, o, p, q, r and s=0 or 1, A1, A2, A3=alkylene or alkenylene radical and Y1, Y2, Y3, Y4?NR5, PR5, O or S, where R5 independently=organic radical, where any two organic radicals selected from R1 to R5 and any radicals present in the alkylene and/or alkenylene radicals A1, A2, A3 may also form one or more further rings, with the proviso that at least one of the radicals selected from R1 to R5 present and any radicals present in the alkylene and/or alkenylene radicals A1, A2, A3 is substituted by at least one —NHR6 or —NH2 group, where R6=organic radical, and c) at least one salt of a strong Brønsted acid with a counterion selected from metal ions, metal-co
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: June 14, 2022
    Assignee: Evonik Operations GmbH
    Inventors: Emmanouil Spyrou, Dirk Fuchsmann, Britta Kohlstruk, Annette Sandkühler
  • Publication number: 20200172723
    Abstract: The present invention relates to compositions comprising at least one epoxy resin, at least one amine having at least two secondary amino groups that are both part of an organic ring system, and at least one alkyl alcohol optionally substituted by at least one aromatic radical and/or by at least one alkenyl radical, to processes for production thereof and to the use thereof.
    Type: Application
    Filed: November 15, 2019
    Publication date: June 4, 2020
    Applicant: Evonik Operations GmbH
    Inventors: Emmanouil Spyrou, Dirk Fuchsmann, Britta Kohlstruk, Annette Sandkühler
  • Publication number: 20190352449
    Abstract: The present invention relates to a low-alkylphenol composition comprising a) at least one epoxy resin, b) at least one amine having at least two secondary amino groups that are both part of an organic ring system, and c) at least one salt of a strong Brønsted acid with a counterion selected from metal ions, metal-containing ions, phosphonium ions and ammonium ions, to processes for production thereof and to the use thereof.
    Type: Application
    Filed: May 10, 2019
    Publication date: November 21, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Emmanouil Spyrou, Dirk Fuchsmann, Britta Kohlstruk, Annette Sandkühler
  • Publication number: 20190352451
    Abstract: The present invention provides a composition comprising a) at least one epoxy resin, b) at least one cyclic amine of the formula (I) in which R1 to R4 is H or an organic radical, with the proviso that at least one of the R1, R2, R3 and R4 radicals ?H, and X?—(Y1)m-(A1)n-(Y2)o-(A2)p-(Y3)q-(A3)r-(Y4)s—??(II) where, independently of one another, m, n, o, p, q, r and s=0 or 1, A1, A2, A3=alkylene or alkenylene radical and Y1, Y2, Y3, Y4?NR5, PR5, O or S, where R5 independently=organic radical, where any two organic radicals selected from R1 to R5 and any radicals present in the alkylene and/or alkenylene radicals A1, A2, A3 may also form one or more further rings, with the proviso that at least one of the radicals selected from R1 to R5 present and any radicals present in the alkylene and/or alkenylene radicals A1, A2, A3 is substituted by at least one —NHR6 or —NH2 group, where R6=organic radical, and c) at least one salt of a strong Brønsted acid with a counterion selected from metal io
    Type: Application
    Filed: May 10, 2019
    Publication date: November 21, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Emmanouil Spyrou, Dirk Fuchsmann, Britta Kohlstruk, Annette Sandkühler
  • Patent number: 10472460
    Abstract: The present invention relates to the use of substituted benzyl alcohols as modifiers in epoxy systems.
    Type: Grant
    Filed: November 4, 2013
    Date of Patent: November 12, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Emmanouil Spyrou, Martina Ortelt, Dirk Fuchsmann, Britta Kohlstruk, Elke Gollan, Andrea Henschke, Jens Hillen
  • Patent number: 10392469
    Abstract: Epoxy resin compositions containing at least one resin component and at least one hardener component are suitable as a thermoset matrix for production of semi-finished fiber matrix products and cured fiber matrix laminates known as composites.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: August 27, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Martina Ortelt, Dirk Fuchsmann, Sebastian de Nardo, Eike Langkabel, Britta Kohlstruk, Annette Sandkuehler, Ralph Aldridge, Katharina Karns
  • Patent number: 10280252
    Abstract: Latent epoxy resin formulations are suitable for liquid impregnation processes for production of fiber composite materials.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: May 7, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Martina Ortelt, Dirk Fuchsmann, Eike Langkabel, Britta Kohlstruk, Jaclyn Balthasar
  • Patent number: 10155840
    Abstract: Epoxy compositions containing at least one resin component and at least one hardener component, are suitable as a thermoset matrix for production of semi-finished fiber matrix products and cured fiber matrix laminates.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: December 18, 2018
    Assignee: Evonik Degussa GmbH
    Inventors: Martina Ortelt, Eike Langkabel, Dirk Fuchsmann, Britta Kohlstruk, Katharina Karns
  • Patent number: 10029427
    Abstract: The invention relates to a method for producing storage-stable polyurethane prepregs and molding bodies produced therefrom (composite components), which can be obtained by a method using a polyurethane composition in solution and by impregnation of fiber-reinforced materials such as of woven fabrics and laid scrim using reactive polyurethane compositions.
    Type: Grant
    Filed: May 30, 2011
    Date of Patent: July 24, 2018
    Assignee: Evonik Degussa GmbH
    Inventors: Friedrich Georg Schmidt, Rainer Lomoelder, Martina Ortelt, Britta Kohlstruk, Emmanouil Spyrou, Holger Loesch, Dirk Fuchsmann
  • Publication number: 20180162991
    Abstract: Latent epoxy resin formulations are suitable for liquid impregnation processes for production of fibre composite materials.
    Type: Application
    Filed: December 12, 2016
    Publication date: June 14, 2018
    Applicant: Evonik Degussa GmbH
    Inventors: Martina ORTELT, Dirk FUCHSMANN, Eike LANGKABEL, Britta KOHLSTRUK, Jaclyn BALTHASAR
  • Patent number: 9994671
    Abstract: A curable composition including an epoxy resin, an open-chain polyamine, and a compound of the formula (I); a hardened composition prepared by curing the curable composition; a process for coating a surface or impregnating a textile sheet, including applying and hardening the curable composition; and a surface, a fiber composite material, a coating, or an adhesive including the hardened composition,
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: June 12, 2018
    Assignee: EVONIK DEGUSSA GMBH
    Inventors: Martina Ortelt, Dirk Fuchsmann, Eike Langkabel, Britta Kohlstruk, Katharina Karns
  • Publication number: 20170166687
    Abstract: Epoxy resin compositions containing at least one resin component and at least one hardener component are suitable as a thermoset matrix for production of semi-finished fibre matrix products and cured fibre matrix laminates known as composites.
    Type: Application
    Filed: December 12, 2016
    Publication date: June 15, 2017
    Applicant: Evonik Degussa GmbH
    Inventors: Martina ORTELT, Dirk FUCHSMANN, Sebastian de NARDO, Eike LANGKABEL, Britta KOHLSTRUK, Annette SANDKUEHLER, Ralph ALDRIDGE, Katharina KARNS
  • Publication number: 20170166688
    Abstract: Epoxy compositions containing at least one resin component and at least one hardener component, are suitable as a thermoset matrix for production of semi-finished fibre matrix products and cured fibre matrix laminates.
    Type: Application
    Filed: December 12, 2016
    Publication date: June 15, 2017
    Applicant: Evonik Degussa GmbH
    Inventors: Martina ORTELT, Eike LANGKABEL, Dirk FUCHSMANN, Britta KOHLSTRUK, Katharina KARNS
  • Patent number: 9676898
    Abstract: The invention relates to curable compositions comprising at least one epoxy resin and at least one hardener wherein the hardener is a compound of formula (I) or (II) where R1 and R2 are each independently selected from the group of substituents having the formula —(CH2)x—NH2 and x is in each case independently 0, 1, 2, 3 or 4, to surfaces comprising such compositions, to methods comprising applying a coating material comprising such compositions and to the use of such compositions as surface protection.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: June 13, 2017
    Assignee: Evonik Degussa GmbH
    Inventors: Martina Ortelt, Emmanouil Spyrou, Jan Christoph Pfeffer, Dirk Fuchsmann, Britta Kohlstruk, Thomas Haas
  • Publication number: 20150376327
    Abstract: The present invention relates to a curable or hardened composition comprising at least one epoxy resin, one open-chain polyamine and one compound of the formula (I) where the moieties R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19 and R20 respectively and mutually independently are selected from the group comprising hydrogen, methyl, ethyl, propyl, isopropyl and amine, with the proviso that at least one moiety from the group comprising R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 is amine and at least one moiety from the group comprising R11, R12, R13, R14, R15, R16, R17, R18, R19 and R20 is amine; to use of a hardener combination comprising an aliphatic diamine and a compound of the formula (I) for the curing of epoxy resin; to a process for the coating of a surface or for the impregnation of a textile sheet, comprising the steps of (a) application and (b) hardening of the curable composition, and also to a surface, fibre composite material, coating or adhesive compri
    Type: Application
    Filed: January 15, 2014
    Publication date: December 31, 2015
    Applicant: Evonik Degussa GmbH
    Inventors: Martina ORTELT, Dirk FUCHSMANN, Eike LANGKABEL, Britta KOHLSTRUK, Katharina KARNS
  • Publication number: 20150337182
    Abstract: The present invention relates to the use of substituted benzyl alcohols as modifiers in epoxy systems.
    Type: Application
    Filed: November 4, 2013
    Publication date: November 26, 2015
    Inventors: Emmanouil SPYROU, Martina ORTELT, Dirk FUCHSMANN, Britta KOHLSTRUK, Elke GOLLAN, Andrea HENSCHKE, Jens HILLEN
  • Publication number: 20150203629
    Abstract: The invention relates to curable compositions comprising at least one epoxy resin and at least one hardener wherein the hardener is a compound of formula (I) or (II) where R1 and R2 are each independently selected from the group of substituents having the formula —(CH2)x—NH2 and x is in each case independently 0, 1, 2, 3 or 4, to surfaces comprising such compositions, to methods comprising applying a coating material comprising such compositions and to the use of such compositions as surface protection.
    Type: Application
    Filed: August 21, 2013
    Publication date: July 23, 2015
    Applicant: Evonik Industries AG
    Inventors: Martina Ortelt, Emmanouil Spyrou, Jan Christoph Pfeffer, Dirk Fuchsmann, Britta Kohlstruk, Thomas Haas
  • Publication number: 20130303042
    Abstract: The invention relates to a method for producing storage-stable polyurethane prepregs and molding bodies produced therefrom (composite components), which can be obtained by a method using a polyurethane composition in solution and by impregnation of fibre-reinforced materials such as of woven fabrics and laid scrim using reactive polyurethane compositions.
    Type: Application
    Filed: May 30, 2011
    Publication date: November 14, 2013
    Applicant: Evonik Degussa GmbH
    Inventors: Friedrich Georg Schmidt, Rainer Lomoelder, Martina Ortelt, Britta Kohlstruk, Emmanouil Spyrou, Holger Loesch, Dirk Fuchsmann