Patents by Inventor Reinold Härzschel

Reinold Härzschel 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).

  • Vinyl aromatic-1,3-diene copolymers stabilized with protection colloids used for modifying materials containing plaster or calcium carbonate
    Patent number: 6566434
    Abstract: The vinyl aromatic-1,3-diene copolymers stabilized with protection colloids are used in the form of aqueous polymer dispersions or water-redispersible polymer powders for modifying materials that contain plaster or calcium carbonate. The polymer dispersions or polymer powders are obtained by the emulsion-polymerization of a mixture containing at least one vinyl aromatic and at least one 1,3-diene in the presence of at least one protection colloid and without any emulsifier, and by optionally drying the aqueous polymer dispersions thus obtained.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: May 20, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Theo Mayer, Peter Fritze, Reinold Härzschel, Hans-Peter Weitzel