Patents by Inventor Freddie E. Polk

Freddie E. Polk 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).

  • Integral skin polyurethane foams and process for the preparation thereof
    Patent number: 5389693
    Abstract: Integral skin polyurethane foams can be prepared using formulations having no HCFC or CFC blowing agents. Such formulations, having water as the only or major blowing agent can also have good physical properties such as low post-blow expansion. A formulation useful for preparing such integral skin polyurethane foams includes:(A) an organic isocyanate functional admixture including(i) a methylene diphenyl diisocyanate soft segment prepolymer,(ii) methylene diphenyl diisocyanate and(iii) polymethylene polyphenyl polyisocyanate,(B) an active hydrogen containing material,(C) a catalyst and(D) a blowing agent.
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: February 14, 1995
    Assignee: The Dow Chemical Company
    Inventors: Ricardo DeGenova, Freddie E. Polk