Fire-class reinforced aerogel compositions

A reinforced aerogel composition comprising a silica-based aerogel framework, reinforced with an open-cell macroporous framework (OCMF) material, wherein the OCMF material comprises a foam, and a fire-class additive, wherein the fire-class additive is endothermic, wherein the silica-based aerogel framework comprises a hydrophobic-bound silicon;

• and wherein the reinforced aerogel composition has the following properties:
• i) liquid water uptake of 20 wt % or less;
• ii) thermal conductivity of 30 mW/M*K or less according to ASTM C518 standard at a temperature of about 37.5° C., in an ambient environment, at atmospheric pressure, and at a compression load of about 2 psi;
• iii) heat of combustion of less than 717 cal/g according to EN ISO 1716 standard;
• and
• wherein:
• the silica-based aerogel framework that is reinforced with the OCMF material comprising the foam has an onset of thermal decomposition temperature;
• and
• the fire-class additive has an onset of endothermic decomposition temperature that is within 50° C. of the onset of thermal decomposition temperature of the silica-based aerogel framework that is reinforced with the OCMF material comprising the foam.