High internal phase ratio emulsion fire extinguishing agent

Details High internal phase ratio emulsion fire extinguishing agent High internal phase ratio emulsion fire extinguishing agent

1974-02-28

1976-10-05

Lechert, Jr., Stephen J.

Compositions

Fire-extinguishing

Foam-stabilizant or colloid-stabilizant containing

252 81, 169 47, A62D 100

Patent

active

039843343

ABSTRACT:
A thixotropic high internal phase ratio emulsion which is essentially nonflammable is employed as a fire extinguishing agent. In the preferred embodiment the emulsion contains an aqueous internal phase which makes up the major part of the emulsion, usually in excess of 90%, but preferably in excess of 95%, and a minor amount of an external phase which is of low volatility and/or flammability such as a heavy oil and an emulsifying material. Because it is thixotropic and cohesive, it forms a blanket over a fire, and coats adjacent surfaces, preventing the spread of the fire. This composition is particularly useful in fighting forest fires where the emulsion can be dropped or sprayed from aircraft with a minimum loss due to dispersion in air currents.

REFERENCES:
patent: 2182440 (1939-12-01), Kotz et al.
patent: 3553128 (1971-01-01), Wilson
patent: 3637022 (1972-01-01), Kelly et al.

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