Method of preparing fire retardant open-cell siloxane foams and

Details Method of preparing fire retardant open-cell siloxane foams and Method of preparing fire retardant open-cell siloxane foams and

1975-07-14

1977-05-31

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25D, 260 25FP, 260 465UA, 260 465H, 260 465G, 260825, 260 37SB, C08J 902

Patent

active

040268420

ABSTRACT:
Siloxane foams can be prepared by mixing an organohydrogensiloxane, a hydroxylated organosiloxane and a platinum catalyst in amounts such that the ratio of silicon-bonded hydrogen atoms to silicon-bonded hydroxyl radicals is from 2.5 to 7 and thereafter allowing the mixture to foam. The amount of open-cell structure in the foam can be increased by having present in the mixture an organomonohydrogensiloxane such that the molar ratio of silicon-bonded hydrogen atoms from the organohydrogensiloxane to silicon-bonded hydrogen atoms from the organomonohydrogensiloxane is from 0.4 to 2. The siloxane foams can be made to have an increased fire retardant property by adding 0.01 to 2 parts by weight carbon black based on the weight of the total composition. Siloxane foams are also prepared from mixing an organohydrogensiloxane, an organomonohydrogensiloxane, a hydroxylated organosiloxane, a vinyl containing triorganosiloxy endblocked polydiorganosiloxane and a platinum catalyst. These foams can be used for cushioning, in acoustical applications and protective filling or coating applications and especially applications wherein fire retarding is important.

REFERENCES:
patent: 3425967 (1969-02-01), Modic
patent: 3677981 (1972-07-01), Wada et al.
patent: 3923705 (1975-12-01), Smith

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