METHOD OF PREPARING FIRE RETARDANT SILOXANE FOAMS AND FOAMS PREPARED THEREFROM

摘要

Abstract of the DisclosureSiloxane foams can be prepared by mixing anorganohydrogensiloxane, a hydroxylated organsiloxane anda platinum catalyst in amounts such that the ratio ofsilicon-bonded hydrogen atoms to silicon-bonded hydroxylradicals is from 2.5 to 40 and thereafter allowing themixture to foam. The siloxane foams can be made to havean increased fire retardant property by adding 0.01 to 2parts by weight carbon black based on the weight of thetotal composition. Siloxane foams are also prepared frommixing an organohydrogensiloxane, a hydroxylated organo-siloxane, a vinyl containing triorganosiloxy endblockedpolydiorganosiloxane and a platinum catalyst. These foamscan be used for cushioning, in acoustical applicationsand protective filling or coating applications andespecially applications wherein fire retarding is important.