Patents Assigned to F. Willich Berg-und Bautechnik GmbH & Co.
  • Organomineral foamed materials and processes for their preparation
    Patent number: 4920155
    Abstract: The subject-matter of the invention are organomineral foamed materials and a process for their preparation by reacting polyisocyanate and water-glass without the use of a foaming agent. In the process according to the invention the foaming of the reaction mixture is achieved in controlled manner by means of the CO.sub.2 released in the reaction of isocyanate groups with water by the addition of a polysiloxane and polyether block copolymer.
    Type: Grant
    Filed: July 22, 1987
    Date of Patent: April 24, 1990
    Assignee: F. Willich Berg-und Bautechnik GmbH & Co.
    Inventor: Harald Bode