HEAT INSULATING ABLATIVE TYPE MATERIALS

摘要

An ablative-type protective material is provided comprising: (a) a polymeric compound comprising a plurality of at least a first repeat unit having form (I) wherein the first repeat unit is present in an amount ranging from about 70 to about 100 mole percent, inclusive, and (b) an aluminum sulfate hydrate of general formula Al2(SO4)3 x nH2O wherein n is an integer from 14 through 18, inclusive, and wherein the aluminum sulfate hydrate is present in an amount greater than about 50 % by weight of the ablative-type protective material. The resulting composition exhibits an improved resistance to oxidative degeneration as well as improved heat and flame protection times.