Patents Examined by S. A. Acquali
  • Integral skin rigid polyurethane structural foam
    Patent number: 4780482
    Abstract: The invention relates to integral skin rigid polyurethane structural foam having high impact strength, high heat distortion and flame retardant properties. This foam is prepared from a polyol selected from the group consisting of polyoxyalkylene polyether polyol, a polyester polyol or mixture thereof, an organic polyisocyanate, a chain extender and blowing agent.
    Type: Grant
    Filed: May 1, 1987
    Date of Patent: October 25, 1988
    Assignee: BASF Corporation
    Inventor: David C. Krueger