Patents by Inventor Erwin Windemuth

Erwin Windemuth 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 the production of new polysiloxane-polyoxyalkylene copolymers with reduced burning properties
    Patent number: 4163830
    Abstract: The invention relates to a method of making branched polysiloxane-polyoxyalkylene copolymers and to their use as stabilizers in the production of polyurethane foam plastics. The copolymers are made by reacting specified organopolysiloxanes with polyisocyanates, heat treating the NCO--containing addition products to cause branching and reacting the branched NCO--containing addition products with monofunctional polyethers. The copolymers can be used to stabilize polyurethane foam reaction mixtures.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: August 7, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Erwin Windemuth, Manfred Dahm, Manfred Dietrich, Peter Muller
  • Process for the production of new polysiloxane-polyoxyalkylene copolymers with reduced burning properties
    Patent number: 4096162
    Abstract: The invention relates to a method of making branched polysiloxane-polyoxyalkylene copolymers and to their use as stabilizers in the production of polyurethane foam plastics. The copolymers are made by reacting specified organopolysiloxanes with polyisocyanates, heat treating the NCO-containing addition products to cause branching and reacting the branched NCO-containing addition products with monofunctional polyethers. The copolymers can be used to stabilize polyurethane foam reaction mixtures.
    Type: Grant
    Filed: December 6, 1970
    Date of Patent: June 20, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Erwin Windemuth, Manfred Dahm, Manfred Dietrich, Peter Muller
  • Process for the production of polyisocyanates of isocyanurate structure
    Patent number: 3996223
    Abstract: Soluble polyisocyanates of isocyanurate structure are produced by heating polyisocyanates in the presence of Mannich bases and carbamic acid esters of isocyanates and secondary alcohols. When such a process is used, the polymerization reactions begin without incubation times and the catalysts need not be inactivated by introducing additives because they deactivate themselves at high temperatures.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: December 7, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Pramod Gupta, Roland Nast, Erwin Windemuth