Patents by Inventor Dirk Wojtasik

Dirk Wojtasik 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: 20240141077
    Abstract: A process for preparing polyether-modified amino-functional polybutadienes involves a) reacting at least one polybutadiene (A) with at least one epoxidizing reagent (B) to give at least one epoxy-functional polybutadiene (C); b) reacting the at least one epoxy-functional polybutadiene (C) with at least one amino-functional compound (D) to give at least one hydroxy- and amino-functional polybutadiene (E); and c) reacting the at least one hydroxy- and amino-functional polybutadiene (E) with at least one epoxy-functional compound (F) to give at least one polyether-modified amino-functional polybutadiene (G). The polyether-modified amino-functional polybutadienes preparable by this process are also provided.
    Type: Application
    Filed: February 9, 2022
    Publication date: May 2, 2024
    Applicant: Evonik Operations GmbH
    Inventors: Frank Schubert, Sarah Otto, Dirk Wojtasik, Frauke Henning
  • Publication number: 20180016392
    Abstract: The present invention provides specific alkoxylation products, a process for preparing them, compositions comprising these alkoxylation products, and their use. In particular the present invention provides an alkoxylation product comprising at least one non-terminal alkoxysilyl group, formed from monomers of at least one alkylene oxide and at least one epoxide bearing alkoxysilyl groups, wherein at least 30% of all the free OH groups on the chain end of the alkoxylation product have been converted to acetoacetate groups.
    Type: Application
    Filed: January 5, 2016
    Publication date: January 18, 2018
    Inventors: Matthias Lobert, Anke Lewin, Wilfried Knott, Frank Schubert, Michael Ferenz, Heike Hahn, Dirk Wojtasik, Carina Eilitz