Evaluation of an Organic-Inorganic Hybrid Insulation Material using an Inorganic Filler and Polyurethane with a Foaming Condition

In this work, the properties of an organic-inorganic hybrid insulating material using an inorganic filler and polyurethane foam with different foaming conditions were investigated. At weight ratios of polyol and isocyanate of 1 to 1.2 good foaming properties were noted. In addition, an addition of 0.4 g of water, 0.1 g of surfactant, and 0.1 g of catalyst with respect to the composites of polyol at 5 g and isocyanate at 6 g showed the lowest apparent density and thermal conductivity. The pore size was smaller in the organic-inorganic hybrid foaming body with an increase in the CaCO3 addition amount. Moreover, the apparent density and thermal conductivity were increased when the added amount of CaCO3 increased. Increasing the amount of CaCO3 powder is expected to improve the flame retardant capabilities; however, doing this tends to increase the apparent density and thermal conductivity.