Patent ID: 9353233
Filing Date: 2016-05-31
CPC Classification: C08G,C08J,C08K,Y10T

Claim Text:
1. A method of preparing flame retardant polyisocyanurate foam filled with silica derived from mesoporous cellular foams, comprising: a) combining a first liquid polyisocyanurate precursor that optionally further comprises one or more catalysts, one or more surfactants, one or more additives or combinations thereof, and silica derived mesoporous cellular foam having a pore volume greater than 2.0 cm b) combining a second liquid polyisocyanurate precursor that optionally further comprises one or more catalysts, one or more surfactants, one or more additives or combinations thereof, and the first mixture to form a second mixture; c) polymerizing the second mixture and thereby generating silica particles having a pore volume of less than 0.2 cm wherein a foaming agent is added to the first mixture, the second mixture, or both.