Patent ID: 7794817
Filing Date: 2010-09-14
Classification: B29C,C04B,C08G,C08J,C08K,C08L,Y02W,Y10T

Abstract:
1. A building material comprising: a polyurethane formed from reactants comprising: at least one isocyanate selected from the group consisting of monomeric di-isocyanates, monomeric poly-isocyanates, oligomeric di-isocyanates and oligomeric poly-isocyanates, wherein the isocyanate comprises between about 6 wt % and about 20 wt %, based on the total weight of the composite material; 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, wherein the first polyol comprises between about 6 wt % and about 18 wt %, based on the total weight of the composite material; 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 56.2 mg KOH/g to 59.0 mg KOH/g, and wherein the second polyol comprises less than about 10 wt %, based on the total weight of the composite material, and wherein the second polyol comprises between about 5 wt % and about 20 wt %, based on the total weight of the first and second polyols being 100 wt %; water, wherein the water comprises less than about 0.5 wt %, based on the total weight of the composite material; one or more catalysts, wherein the polyurethane matrix is less rigid than a second polyurethane that would be formed by the reaction of the first polyol and the at least one isocyanate in the absence of the second polyol; and an inorganic particulate material component, wherein the inorganic particulate material component comprises between 60 wt % and 72 wt %, based on the total weight of the composite material, and wherein the inorganic particulate material component comprises particles with a particle size distribution between about 0.0625 in. and about 325 mesh.