Patents by Inventor Rudolf Ammann

Rudolf Ammann 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).

  • Flexible polyurethane foams based upon the use of a soluble amine salt as crosslinking agent
    Patent number: 4136241
    Abstract: In a process for producing polyurethane foam, which process comprises reacting in one step a polyether polyol and a crosslinking agent with a polyisocyanate in the presence of a catalyst and a blowing agent, the improvement of employing as at least a major proportion of the crosslinking agent a soluble amine salt obtained by reacting a cycloaliphatic polyamine having at least two primary amine groups with approximately the stoichiometric amount of a carboxylic acid.
    Type: Grant
    Filed: March 24, 1978
    Date of Patent: January 23, 1979
    Assignee: The Dow Chemical Company
    Inventor: Rudolf Ammann