Patents by Inventor Petra Schnell

Petra Schnell 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).

  • Crosslinked polyether-siloxane block copolymers and their use for producing polyurethane foams
    Patent number: 11965064
    Abstract: Crosslinked polyether siloxane block copolymers are obtained by reacting an alpha-omega hydrogen siloxane with at least one higher-order hydrogen siloxane and at least one polyether in the presence of a hydrosilylation catalyst. These are described, and also use thereof as additives for producing polyurethane foams, particularly mechanically foamed polyurethane foams.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: April 23, 2024
    Assignee: Evonik Operations GmbH
    Inventors: Michael Klostermann, Michael Ferenz, Kai-Oliver Feldmann, Marvin Jansen, Michelle Fluder, Sina Arnold, Petra Schnell
  • POLYETHER-SILOXANE BLOCK COPOLYMERS FOR THE PRODUCTION OF POLYURETHANE FOAMS
    Publication number: 20220185967
    Abstract: A process for preparing polyether-siloxane block copolymers by hydrosilylation of alpha,omega-modified hydrosiloxanes with alpha,omega-modified di(meth)allyl polyethers in the presence of a hydrosilylation catalyst, wherein the reaction is performed in a solvent mixture comprising aromatic solvents, polyethers and alkoxylated alcohol, is described.
    Type: Application
    Filed: November 10, 2021
    Publication date: June 16, 2022
    Applicant: Evonik Operations GmbH
    Inventors: Michael Ferenz, Michael Klostermann, Kai-Oliver Feldmann, Petra Schnell, Michelle Eckhoff
  • CROSSLINKED POLYETHER-SILOXANE BLOCK COPOLYMERS AND THEIR USE FOR PRODUCING POLYURETHANE FOAMS
    Publication number: 20210047474
    Abstract: Crosslinked polyether siloxane block copolymers are obtained by reacting an alpha-omega hydrogen siloxane with at least one higher-order hydrogen siloxane and at least one polyether in the presence of a hydrosilylation catalyst. These are described, and also use thereof as additives for producing polyurethane foams, particularly mechanically foamed polyurethane foams.
    Type: Application
    Filed: February 8, 2019
    Publication date: February 18, 2021
    Applicant: Evonik Operations GmbH
    Inventors: Michael Klostermann, Michael Ferenz, Kai-Oliver Feldmann, Marvin Jansen, Michelle Fluder, Sina Arnold, Petra Schnell