×

METHOD OF MOLDING RIGID POLYURETHANE FOAMS

  • US 20130243986A1
  • Filed: 11/30/2011
  • Published: 09/19/2013
  • Est. Priority Date: 12/09/2010
  • Status: Abandoned Application
First Claim
Patent Images

1. A method of making a molded rigid polyurethane foam comprising:

  • injecting into a closed mold cavity a reaction mixture at a packing factor of 1.03 to 1.9, wherein the mold cavity is under a pressure of from 300 to 950 mbar, wherein the reaction mixture comprises;

    a) an organic polyisocyanate;

    b) a polyol composition;

    c) a catalyst;

    d) optionally auxiliary substances and/or additives; and

    e) a chemical blowing agent component in an amount of from 1 to 5 weight percent based on the total weight of components b) to e), the chemical blowing agent component comprising at least one chemical blowing agent,wherein the chemical blowing agent component is the sole blowing agent.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×