Research on Flame Retarded of Polyurethane Rigid Foam/Expanded Perlite Thermal Insulation Composites

The polyurethane rigid foam/expanded perlite thermal insulation composites (PPC) have been prepared by mixing the two-component polyurethane and expanded perlite. The effects of proportioning of constituents on the fireproofing performance of PPC were investigated according to maximum flame height using a small scale burner test. The results showed the expanded perlite has a great effect on the flame retardant properties of PPC.