Compositions – Fire-extinguishing – Foam-stabilizant or colloid-stabilizant containing
Patent
1991-01-24
1992-02-04
Stoll, Robert L.
Compositions
Fire-extinguishing
Foam-stabilizant or colloid-stabilizant containing
252 3, 252307, 169 44, 169 46, A62D 100
Patent
active
050857860
ABSTRACT:
An improved aqueous film-forming foamable concentrate which is particularly useful for extinguishing flammable liquid fires. The preferred formulation contains (a) fluoroaliphatic amphoteric surfactant, preferably a fluorinated aminocarboxylate having a C.sub.4 to C.sub.10 perfluoroaliphatic group, (b) fluoroaliphatic anionic surfactant, preferably a C.sub.4 to C.sub.10 perfluoroalkane suflonate, and (C) short chain (C.sub.6 to C.sub.10) alkyl ether sufate hydrocarbon surfactant. When the concentrate is diluted with fresh or sea water and aerated, an aqueous film-forming foam is produced which is useful in extinguishing flammable liquid fires such as a fuel fire. The foam quickly spreads a superior vapor-sealing film on the surface of a burning fuel. The film reforms quickly when disturbed. The improved film-forming properties results in quicker and more reliable extinguishment of flammable liquid fires.
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Alm Roger R.
Stern Richard M.
Bhat N.
Griswold Gary L.
Kirn Walter N.
Maki Eloise J.
Minnesota Mining and Manufacturing Company
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