Patents Assigned to Dennis Chemical Co., Inc.
  • Method and apparatus for nucleation of polyurethane foam which results in self-adhering microcellular foam
    Patent number: 5472990
    Abstract: An apparatus and method for producing foam polyurethane incorporates an apparatus for mixing a nucleating gas into the polyol (part B) fraction and finally dispersing the nucleating gas prior to mixing the polyol (part B) fraction with the isocyanate (part A) fraction. The apparatus and method produce a very fine and uniform microcellular structure in the foam.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: December 5, 1995
    Assignee: Dennis Chemical Co., Inc.
    Inventors: Todd A. Craig, Stephen G. Weissler, Dennis R. Oliver