Compositions of fire-extinguishing foam concentrates and method

Details Compositions of fire-extinguishing foam concentrates and method Compositions of fire-extinguishing foam concentrates and method

1973-09-24

1976-05-11

Bentley, Stephen C.

Compositions

Fire-extinguishing

Foam or gas phase containing

252 805, 252307, A62D 100

Patent

active

039561380

ABSTRACT:
A foam concentrate comprising from about 7.5% to about 12% by weight of an anionic surfactant, from about 4% to about 9% by weight of an ammonium salt surfactant, from about 1% to about 8% by weight of a nonionic surfactant, up to about 5% by weight of a lipophilic agent, up to about 9% by weight of an alkoxylated ammonium alkyl sulfate and the balance being substantially water or other suitable non-flammable carrier diluent, when diluted with from about 33 to about 99 times its weight of water, is useful for extinguishing fires of Class A combustibles.
Those concentrates which contain at least 1% by weight of a lipophilic agent, when diluted similarly, yield foams which are useful for extinguishing Class B fires and mixed Class A and Class B fires. Concentrates containing at least 1% by weight of alkoxylated ammonium alkyl sulfate, when diluted with brackish, saline or hard water, yield foams which extinguish fires. Optimum and preferred ranges for the various components are given.

REFERENCES:
patent: 3457172 (1969-07-01), Stewart et al.
patent: 3479285 (1969-11-01), Barthauer
patent: 3562156 (1971-02-01), Francen
patent: 3579446 (1971-05-01), Kroke et al.
patent: 3616859 (1971-11-01), Shay et al.
patent: 3634233 (1972-01-01), Hiltz
patent: 3655555 (1972-04-01), Rossmy et al.
patent: 3661776 (1972-05-01), Fletcher
patent: 3721706 (1973-03-01), Hoffmann
patent: 3772195 (1973-11-01), Francen
patent: 3839425 (1974-10-01), Bartlett

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