Patents by Inventor Helmut Vorbuchner

Helmut Vorbuchner 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 hydrophobic particulate solids containing Si-OH groups and a process for using the same
    Patent number: 5057151
    Abstract: The invention relates to a process for rendering particulate solids containing Si-OH groups hydrophobic which comprises reacting a water repellent containing an organo-silicon compound with particulate solids containing Si-OH groups with simultaneous mechanical loading of the reaction mixture, in which from 5 to 50 percent by weight of the particulate solids containing Si-OH groups are used, based on the total weight of the reaction mixture containing particulate solids and water repellent, and the use of the resultant hydrophobic particulate solids in compositions containing diorganopolysiloxanes, which can be cured to form elastomers.
    Type: Grant
    Filed: November 24, 1989
    Date of Patent: October 15, 1991
    Assignee: Wacker-Chemie GmbH
    Inventors: Johann Schuster, Horst Muller, Helmut Vorbuchner, Anton Maier, Ferdinand Pradl