Flame-retardant polyurethane foams

Details Flame-retardant polyurethane foams Flame-retardant polyurethane foams

1978-10-10

1980-10-28

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521107, 521108, 521109, 521117, 521118, 521123, C08G 1814

Patent

active

042308224

ABSTRACT:
Improved hydrophilic crosslinked polyurethane foams are prepared by reacting (a) an isocyanate-capped polyoxyethylene prepolymer with (b) at least 20 moles of water per mole of NCO groups in the presence of (c) alumina hydrate, (d) a phosphorus fire-retardant additive and (e) an organic carbon compound which serves to react with phosphate anions at high temperatures (e.g., in the presence of a flame) and reinforces the char provided by combustion of the foam.

REFERENCES:
patent: 3956202 (1976-05-01), Iwasaki
patent: 4066578 (1978-01-01), Murch et al.

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