Foam composites and methods of preparation thereof

A foam composite comprising:

• polyurethane;
• and
• fly ash in an amount of 45% to 75% by weight with respect to the total weight of the foam composite;
• wherein at least one of a glass transition temperature or a melting point of the foam composite is 50° C. to 200° C., and a thermal degradation temperature of the foam composite is less than 400° C.;
• and
• wherein the foam composite has
• a closed cell content equal to or greater than 50%;
• a compressive strength equal to or greater than 20 psi;
• a flexural strength of 20 psi to 100 psi;
• a density of 2 pcf to 25 pcf;
• and
• a thermal conductivity equal to or less than 0.050 W/m K.

A foam composite comprising:

• a polymeric material;
• and
• a particulate filler in an amount of 25% by weight to about 75% by weight with respect to the total weight of the foam composite;
• wherein the foam composite has a density of 2 pcf to 10 pcf;
• and a thermal conductivity of 0.020 W/m K to 0.040 W/m K;
• and
• wherein a flexural strength of the foam composite is 20 psi to 100 psi.