Patents by Inventor Werner Obrecht

Werner Obrecht 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: 20200332030
    Abstract: The present invention relates to a process for preparing nitrile rubbers having reduced molecular weight by metathesis of a first nitrile rubber in the presence of specific ruthenium complex catalysts that have particular N-heterocyclic carbene ligands.
    Type: Application
    Filed: December 5, 2018
    Publication date: October 22, 2020
    Applicant: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Werner OBRECHT, Sarah DAVID, Hiyam SALEM
  • Patent number: 10544234
    Abstract: The present invention relates to functionalized copolymer rubbers containing nitrile groups and to the preparation thereof, to vulcanizable mixtures comprising functionalized copolymer rubbers containing nitrile groups and to the preparation thereof, and to vulcanizates based on functionalized copolymer rubbers containing nitrile groups, to the preparation thereof and to the use thereof as technical material.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: January 28, 2020
    Assignee: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Susanna Lieber, Karola Schneiders, Christoph Kins, Werner Obrecht
  • Patent number: 10508156
    Abstract: Catalyst compositions based on Ruthenium- or Osmium-based complex catalysts and specific co-catalysts are provided for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: December 17, 2019
    Assignee: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Werner Obrecht, Sarah David, Qingchun Liu, Zhenli Wei
  • Patent number: 10500578
    Abstract: This invention relates to novel catalyst compositions based on Ruthenium- or Osmium-based complex catalysts of the Grubbs-Hoveyda, Grela or Zhan type and specific co-catalysts comprising at least one vinyl group, pref. ethyl vinyl ether, and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions, preferably with a preceding metathesis step using the same complex catalyst as in the hydrogenation step.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: December 10, 2019
    Assignee: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Werner Obrecht, Sarah David, Qingchun Liu, Zhenli Wei
  • Patent number: 10494467
    Abstract: A copolymer rubber includes, based on a total amount of 100% by weight of all monomer units, ?,?-ethylenically unsaturated nitrile units, conjugated diene units, and ?,?-ethylenically unsaturated monocarboxylic acid monoester units selected from the group consisting of methoxyethyl (meth)acrylates, and polyethylene glycol (meth)acrylates. The rubber has a glass transition temperature lower than ?20° C., an oil swelling of not more than 20 vol %, and provides a balance of good low-temperature stability and oil resistance.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: December 3, 2019
    Assignee: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Werner Obrecht, Hiyam Salem, Susanna Lieber, Irene Moll, Andreas Kaiser
  • Publication number: 20180297022
    Abstract: This invention relates to novel catalyst compositions based on Ruthenium- or Osmium-based complex catalysts of the Grubbs-Hoveyda, Grela or Zhan type and specific co-catalysts comprising at least one vinyl group, pref. ethyl vinyl ether, and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions, preferably with a preceding metathesis step using the same complex catalyst as in the hydrogenation step.
    Type: Application
    Filed: January 10, 2018
    Publication date: October 18, 2018
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: WERNER OBRECHT, SARAH DAVID, QINGCHUN LIU, ZHENLI WEI
  • Patent number: 10100132
    Abstract: The present invention is related to a process for the preparation of polymers containing amino groups by hydrogenation of nitrile groups containing polymers by heterogeneous catalysis.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: October 16, 2018
    Assignee: ARLANXEO Deutschland GmbH
    Inventors: Joerg-Dietrich Jentsch, Johannes Kaulen, Werner Obrecht, Rommy Schneider, Christoph Larcher, Leonid Kustov, Alexander Greish, Elena Shouvalova, Olga Kirichenko
  • Publication number: 20180223005
    Abstract: Catalyst compositions based on Ruthenium- or Osmium-based complex catalysts and specific co-catalysts are provided for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions.
    Type: Application
    Filed: January 29, 2018
    Publication date: August 9, 2018
    Applicant: ARLANXEO Deutschland GmbH
    Inventors: Werner OBRECHT, Sarah DAVID, Qingchun LIU, Zhenli WEI
  • Patent number: 10011664
    Abstract: Provided are new functionalized nitrile rubbers, which may optionally also be in partially or wholly hydrogenated form, and also a process for preparing them by metathesis of nitrile rubbers in the presence of a metathesis catalyst and at least one functionalized allyl compound. The new functionalized nitrile rubbers are suitable for producing vulcanizable mixtures and allow the production of vulcanizates having very stable networks. Also made possible, in particular, is the synthesis of block copolymers.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: July 3, 2018
    Assignee: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Werner Obrecht, Julia Maria Jeschko, Oskar Nuyken, Martin Schneider
  • Publication number: 20170190806
    Abstract: Provided are new functionalized nitrile rubbers, which may optionally also be in partially or wholly hydrogenated form, and also a process for preparing them by metathesis of nitrile rubbers in the presence of a metathesis catalyst and at least one functionalized allyl compound. The new functionalized nitrile rubbers are suitable for producing vulcanizable mixtures and allow the production of vulcanizates having very stable networks. Also made possible, in particular, is the synthesis of block copolymers.
    Type: Application
    Filed: January 25, 2012
    Publication date: July 6, 2017
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Werner Obrecht, Julia Maria Jeschko, Oskar Nuyken, Martin Schneider
  • Publication number: 20170081430
    Abstract: The present invention is related to a process for the preparation of polymers containing amino groups by hydrogenation of nitrile groups containing polymers by heterogeneous catalysis.
    Type: Application
    Filed: March 6, 2015
    Publication date: March 23, 2017
    Inventors: Joerg-Dietrich JENTSCH, Johannes KAULEN, Werner OBRECHT, Rommy SCHNEIDER, Christoph LARCHER, Leonid KUSTOV, Alexander GREISH, Elena SHOUVALOVA, Olga KIRICHENKO
  • Patent number: 9593168
    Abstract: A process of degrading nitrile rubbers comprises subjecting them to a metathesis reaction in the presence of specific catalysts with increased activity.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: March 14, 2017
    Assignee: ARLANXEO Deutschland GmbH
    Inventors: Werner Obrecht, Christopher Ong, Julia Maria Jeschko, Oskar Nuyken
  • Publication number: 20160376421
    Abstract: Novel hydrogenated nitrile rubbers having a specific phenol content are provided, as are a process for production thereof, vulcanizable mixtures based thereon and vulcanizates thus obtained. The vulcanizates feature particularly good moduli and compression set values, and very good storage stabilities.
    Type: Application
    Filed: December 29, 2014
    Publication date: December 29, 2016
    Inventor: WERNER OBRECHT
  • Publication number: 20160376422
    Abstract: Novel phenol-containing nitrile rubbers having a specific phenol content are provided, as are a process for production thereof, vulcanizable mixtures based thereon and vulcanizes thus obtained. The vulcanizes feature particularly good storage stability, moduli and elongation at break.
    Type: Application
    Filed: December 29, 2014
    Publication date: December 29, 2016
    Inventor: Werner Obrecht
  • Publication number: 20160326322
    Abstract: Novel hydrogenated nitrile rubbers are provided, which include phosphine oxides and/or diphosphine oxides and a specific content of halogens, and which enable access to vulcanizable mixtures and corresponding vulcanizates that possess improved moduli and compression set values. These novel hydrogen nitrile rubbers are obtained by a production process, in which the hydrogenated nitrile rubbers are reacted with at least one specific sulphur compound.
    Type: Application
    Filed: December 29, 2014
    Publication date: November 10, 2016
    Inventor: WERNER OBRECHT
  • Publication number: 20160326272
    Abstract: Novel hydrogenated nitrile rubbers are provided, which, as well as having reduced contents of phosphines and/or diphosphines, include phosphine oxides and a specific content of halogens, and which enable access to vulcanizable mixtures and corresponding vulcanizates that possess improved moduli and compression set values and good values for heat buildup under dynamic stress. These novel hydrogenated nitrile rubbers are obtained by a specific production process, in the course of which the hydrogenated nitrile rubbers are reacted with at least one specific oxidizing agent.
    Type: Application
    Filed: December 29, 2014
    Publication date: November 10, 2016
    Inventor: WERNER OBRECHT
  • Publication number: 20160326273
    Abstract: Novel hydrogenated nitrile rubbers having a specific phenol content are provided, as are a process for production thereof, vulcanizable mixtures based thereon and vulcanizates thus obtained. The vulcanizates feature particularly good moduli and compression set values.
    Type: Application
    Filed: December 29, 2014
    Publication date: November 10, 2016
    Inventor: WERNER OBRECHT
  • Publication number: 20160326271
    Abstract: The invention relates to novel hydrogenated nitrile rubbers containing phosphine sulphides and/or diphosphate sulphides, to a process for production thereof, vulcanizable mixtures based on the hydrogenated nitrile rubbers, and to vulcanizates obtained in that way. The hydrogenated nitrile rubbers feature a very good profile of properties, especially with regard to the stress values at different elongations and the compression set after storage at high temperatures.
    Type: Application
    Filed: December 29, 2014
    Publication date: November 10, 2016
    Inventor: WERNER OBRECHT
  • Patent number: 9475060
    Abstract: A method and apparatus for disintegrating an elastomer is provided. The elastomer is moved across a base relative to a cutting tool and toward the cutting tool. The cutting tool has a cutting wedge, which has a cutting edge and a rake face adjacent to the cutting edge. After the cutting wedge comes into contact with the elastomer, the elastomer is first at least partially compressed only by the rake face between the rake face and the base before the cutting edge cuts through the elastomer. An elastic evasive movement of the elastomer is avoided because of the initial planar compression of the elastomer by the rake face. Thus, it is possible to cut off significantly thinner pieces from the elastomer.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: October 25, 2016
    Assignee: LANXESS DEUTSCHLAND GMBH
    Inventors: Lothar Reif, Thomas Neuner, Christian Mähner-Wolfarth, Werner Obrecht
  • Publication number: 20160257773
    Abstract: The present invention relates to copolymer rubbers containing nitrile groups and to the preparation thereof, to vulcanizable mixtures comprising copolymer rubbers containing nitrile groups and to the production thereof, and to vulcanizates based on copolymer rubbers containing nitrile groups, to the production thereof and to the use thereof as technical material.
    Type: Application
    Filed: October 29, 2014
    Publication date: September 8, 2016
    Inventors: Werner OBRECHT, Hiyam SALEM, Susanna LIEBER, Irene MOLL, Andreas KAISER