Patent ID: 7763341

Claim:
A polymer composite material, comprising: (1) a polyurethane formed by reaction of a reaction mixture, comprising: (a) one or more monomeric or oligomeric poly- or di-isocyanates; (b) a first polyol comprising a polyether polyol, the first polyol having a first hydroxyl number in the range of 365 mg KOH/g to 395 mg KOH/g; and (c) a second polyol comprising a polyether polyol, the second polyol having a second hydroxyl number in the range of 33.8 mg KOH/g to 37.2 mg KOH/g, or from 56.2 mg KOH/g to 59.0 mg KOH/g, and forming the polyurethane, wherein the polyurethane is less rigid than a second polyurethane that would be formed by the reaction of the first polyol and the one or more monomeric or oligomeric poly- or di-isocyanates in the absence of the second polyol, and wherein the second polyol is between about 5 wt % and about 20 wt %, based on the total weight of the first and second polyols being 100 wt %; and (2) an inorganic particulate material comprising one or more of fly ash, bottom ash, particulate glass and granite tailings dispersed in the polymer matrix, the inorganic particulate material being 60 to 72 wt %, based on the total weight of the composite material.