Patents by Inventor Sarah David

Sarah David 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).

  • Process for preparing HNBR solutions with alternative solvents
    Patent number: 11958924
    Abstract: The present invention relates to a process for preparing solutions of hydrogenated nitrile-diene copolymer, wherein the nitrile-diene copolymer dissolved in an ether-containing or ketone-containing solvent mixture is subjected to hydrogenation conditions. The invention further relates to solutions of hydrogenated nitrile-diene copolymer (HNBR solutions) comprising CPME as solvent, and to the use of HNBR solutions in CPME-containing solvent mixtures as binder in electrodes.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: April 16, 2024
    Assignee: Arlanxeo Deutschland GmbH
    Inventors: Karola Schneiders, Susanna Lieber, Sarah David
  • HNBR vulcanisates containing polycyclic aromatic hydrocarbons
    Publication number: 20220372255
    Abstract: The present invention relates to vulcanisates comprising hydrogenated nitrile rubber (HNBR) and at least one polycyclic aromatic hydrocarbon (PAH), and to the use thereof as belts, gaskets or hoses.
    Type: Application
    Filed: June 30, 2020
    Publication date: November 24, 2022
    Applicant: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Susanna LIEBER, Sarah DAVID
  • Process for producing nitrile rubbers using ruthenium complex catalysts
    Patent number: 11407843
    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: Grant
    Filed: December 5, 2018
    Date of Patent: August 9, 2022
    Assignee: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Werner Obrecht, Sarah David, Hiyam Salem
  • Use of catalysts for the metathesis of nitrile rubber
    Patent number: 11311868
    Abstract: The present invention relates to the use of specific catalysts for the metathesis degradation of nitrile rubber (NBR). The invention further relates to a method for preparing nitrile rubber with reduced molecular weight using specific catalysts.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: April 26, 2022
    Assignee: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Silvia Schnitzler, Sarah David
  • PROCESS FOR PREPARING HNBR SOLUTIONS WITH ALTERNATIVE SOLVENTS
    Publication number: 20220041780
    Abstract: The present invention relates to a process for preparing solutions of hydrogenated nitrile-diene copolymer, wherein the nitrile-diene copolymer dissolved in an ether-containing or ketone-containing solvent mixture is subjected to hydrogenation conditions. The invention further relates to solutions of hydrogenated nitrile-diene copolymer (HNBR solutions) comprising CPME as solvent, and to the use of HNBR solutions in CPME-containing solvent mixtures as binder in electrodes.
    Type: Application
    Filed: November 26, 2019
    Publication date: February 10, 2022
    Applicant: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Karola SCHNEIDERS, Susanna LIEBER, Sarah DAVID
  • Use of ruthenium and osmium catalysts for the metathesis of nitrile rubber
    Patent number: 11203679
    Abstract: The present invention relates to the use of Ru and Os carbene complexes with a hydroxamic acid (ester) function for the metathesis degradation of nitrile rubber (NBR). The invention further relates to a method for producing hydrogenated nitrile rubbers, by subjecting a nitrile rubber to a metathesis degradation in the presence of the said catalyst, and the degraded nitrile rubber obtained subsequently undergoes a hydrogenation, preferably in situ.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: December 21, 2021
    Assignee: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Silvia Schnitzler, Sarah David
  • METHOD FOR PRODUCING HYDROGENATED NITRILE RUBBER AND HNBR COMPOSITIONS THEREOF
    Publication number: 20210340285
    Abstract: The present invention relates to a method for producing hydrogenated nitrile rubber (HNBR) having good ageing properties in the presence of ruthenium, palladium or rhodium compounds and also to the hydrogenated nitrile rubber produced by this method and HNBR compositions thereof.
    Type: Application
    Filed: July 15, 2019
    Publication date: November 4, 2021
    Applicant: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Karola SCHNEIDERS, Sarah DAVID, Susanna LIEBER
  • USE OF CATALYSTS FOR THE METATHESIS OF NITRILE RUBBER
    Publication number: 20210260568
    Abstract: The present invention relates to the use of specific catalysts for the metathesis degradation of nitrile rubber (NBR). The invention further relates to a method for preparing nitrile rubber with reduced molecular weight using specific catalysts.
    Type: Application
    Filed: July 9, 2019
    Publication date: August 26, 2021
    Inventors: Silvia SCHNITZLER, Sarah DAVID
  • Hydrogenated nitrile-butadiene-PEG-acrylate co-polymers
    Patent number: 11046799
    Abstract: The present invention relates to hydrogenated nitrile-butadiene-PEG acrylate copolymers, to the preparation thereof, to vulcanizable mixtures comprising hydrogenated nitrile-butadiene-PEG acrylate copolymers and the preparation thereof, and vulcanizates based on hydrogenated nitrile-butadiene-PEG acrylate copolymer.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: June 29, 2021
    Assignee: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Hiyam Salem, Susanna Lieber, Sarah David, Karola Schneiders
  • USE OF VULCANISATES COMPRISING HNBR-PEG ACRYLATE COPOLYMER IN CONTACT WITH COOLANT
    Publication number: 20210179825
    Abstract: The present invention relates to the use of a vulcanisable composition comprising HNBR-PEG acrylate copolymer for production of vulcanisates that are in contact with coolant. The invention further relates to the use of a vulcanisate produced from a vulcanisable composition comprising HNBR-PEG acrylate copolymer as a component part, preferably as a gasket or as a hose, in contact with coolant.
    Type: Application
    Filed: April 3, 2019
    Publication date: June 17, 2021
    Applicant: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Susanna LIEBER, Sarah DAVID
  • USE OF RUTHENIUM AND OSMIUM CATALYSTS FOR THE METATHESIS OF NITRILE RUBBER
    Publication number: 20210130590
    Abstract: The present invention relates to the use of Ru and Os carbene complexes with a hydroxamic acid (ester) function for the metathesis degradation of nitrile rubber (NBR). The invention further relates to a method for producing hydrogenated nitrile rubbers, by subjecting a nitrile rubber to a metathesis degradation in the presence of the said catalyst, and the degraded nitrile rubber obtained subsequently undergoes a hydrogenation, preferably in situ.
    Type: Application
    Filed: April 26, 2019
    Publication date: May 6, 2021
    Applicant: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Silvia SCHNITZLER, Sarah DAVID
  • PROCESS FOR PRODUCING NITRILE RUBBERS USING RUTHENIUM COMPLEX CATALYSTS
    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
  • Catalyst compositions and their use for hydrogenation of nitrile rubber
    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
  • Catalyst compositions and their use for hydrogenation of nitrile rubber
    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
  • HYDROGENATED NITRILE-BUTADIENE-PEC-ACRYLATE CO-POLYMERS
    Publication number: 20190031804
    Abstract: The present invention relates to hydrogenated nitrile-butadiene-PEG acrylate copolymers, to the preparation thereof, to vulcanizable mixtures comprising hydrogenated nitrile-butadiene-PEG acrylate copolymers and the preparation thereof, and vulcanizates based on hydrogenated nitrile-butadiene-PEG acrylate copolymer.
    Type: Application
    Filed: January 24, 2017
    Publication date: January 31, 2019
    Applicant: ARLANXEO DEUTSCHLAND GMBH
    Inventors: HIYAM SALEM, SUSANNA LIEBER, SARAH DAVID, KAROLA SCHNEIDERS
  • CATALYST COMPOSITIONS AND THEIR USE FOR HYDROGENATION OF NITRILE RUBBER
    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
  • CATALYST COMPOSITIONS AND THEIR USE FOR HYDROGENATION OF NITRILE RUBBER
    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
  • CATALYST COMPOSITIONS AND THEIR USE FOR HYDROGENATION OF NITRILE RUBBER
    Publication number: 20150126683
    Abstract: This invention relates to novel catalyst compositions based on ruthenium or osmium carbene-complex catalysts, pref. of the Grubbs-I, -II or -III type or fluorenylidene analogues thereof, and terminal olefins, pref. enol ethers such as ethyl vinyl ether (EVE or VEE) as co-catalysts and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions, pref. with a preceding metathesis step using the same complex catalyst as in the hydrogenation step.
    Type: Application
    Filed: October 19, 2012
    Publication date: May 7, 2015
    Applicant: LANXESS Deutschland GmbH
    Inventors: Werner Obrecht, Sarah David, Qingchun Liu, Zhenli Wei
  • CATALYST COMPOSITIONS AND THEIR USE FOR HYDROGENATION OF NITRILE RUBBER
    Publication number: 20150025199
    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: October 19, 2012
    Publication date: January 22, 2015
    Inventors: Werner Obrecht, Sarah David, Qingchun Liu, Zhenli Wei
  • METHOD FOR PRODUCING PURIFIED NITRILE RUBBERS
    Publication number: 20140329982
    Abstract: A new process is provided for producing a purified nitrile rubber by subjecting the nitrile rubber, which contains specific impurities, to a defined ultrafiltration. Success is thereby achieved in substantially reducing the amount of the specific impurities in the nitrile rubber.
    Type: Application
    Filed: December 11, 2012
    Publication date: November 6, 2014
    Inventors: Sven Brandau, Sarah David, Florian Forner, Stefan Huesgen, Andreas Kaiser, Julia Maria Jeschko, Peter Schwan