×

Filled polyurethane composites and methods of making same

  • US 8,846,776 B2
  • Filed: 08/12/2010
  • Issued: 09/30/2014
  • Est. Priority Date: 08/14/2009
  • Status: Active Grant
First Claim
Patent Images

1. A rigid composite material comprising:

  • a polyurethane formed by the reaction of an isocyanate selected from the group consisting of diisocyanates, polyisocyanates and mixtures thereof, and at least two polyols, the at least two polyols comprising;

    a high hydroxyl number polyol selected from the group consisting of polyether polyols and polyester polyols, the high hydroxyl number polyol having a hydroxyl number greater than 250 and having 75% or greater primary hydroxyl groups, wherein the high hydroxyl number polyol includes an aromatic polyester polyol and wherein the high hydroxyl number polyol comprises from about 1% to about 25% by weight of the total polyol content used to form the polyurethane, anda low hydroxyl number polyol selected from the group consisting of polyether polyols and polyester polyols, the low hydroxyl number polyol having a hydroxyl number of 250 or lower; and

    from about 40% to about 90% by weight coal ash,wherein the composite material has a density of 5 lb/ft3 or greater.

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