Fire fighting with thixotropic foam

Details Fire fighting with thixotropic foam Fire fighting with thixotropic foam

1975-03-12

1977-11-29

Padgett, Benjamin R.

Fire extinguishers

Processes

Of extinguishing fire

169 46, 252 3, 252 65, 252 805, 252307, 252316, A62D 100

Patent

active

040601323

ABSTRACT:
Aqueous foam formed with a solution containing a thixotropic polysaccharide in addition to foaming agent, will gel when projected onto a burning hydrophilic liquid, and such foam is not destroyed by the liquid, so that it is suitable to fight fires on hydrophilic liquids as well as on hydrophobic liquids and on solids that are compatible with the foam. The thixotropic character enables the ready pumping of the foam and of the solution from which it is formed. A substantial content of N-methyl pyrrolidone-2 in a concentrate for such foam-producing solution makes such concentrate more adaptable for ready dilution and also improves its stability. Other ingredients can also be included such as to form films over hydrophobic liquids to improve the stability of the foam that is formed and to increase the thixotropic action.

REFERENCES:
patent: 2514310 (1950-07-01), Busse et al.
patent: 2529211 (1950-11-01), Busse et al.
patent: 3301848 (1967-01-01), Halleck
patent: 3334052 (1967-08-01), Kurz et al.
patent: 3383307 (1968-05-01), Goetz
patent: 3480546 (1969-11-01), Bashaw et al.
patent: 3557016 (1971-01-01), Schuppner, Jr.
patent: 3562156 (1972-02-01), Francen
patent: 3562176 (1971-02-01), Stancioff et al.
patent: 3619842 (1971-11-01), Maierson
patent: 3677347 (1972-07-01), Rosen et al.
patent: 3741805 (1973-06-01), Crotty et al.
patent: 3849315 (1974-11-01), Chiesa, Jr.
patent: 3957657 (1976-05-01), Chiesa, Jr.
patent: 3957658 (1976-05-01), Chiesa, Jr. et al.

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