MULTIPURPOSE FIRE-EXTINGUISHING POWDER Russian patent published in 2000 - IPC

FIELD: fire extinguishing. SUBSTANCE: invention, in particular, relates to fire-extinguishing powders effective in extinguishing smouldering materials, burning flammable liquids and combustible gases, and also fires on energized electric plants. Powder contains, wt.%: ammophos, 40-65; kaolin- chamotte, 0.5-10; superfine hydrophobic silica, 0.5-5; and water-insoluble mineral or mineral mixture with real density 2/8 g/cu.cm and particle size less than 150 mcm, the balance. Not more than 30% of ammophos has particle size 50-100 mcm and at least 70% less than 50 mcm. Size of kaolin-chamotte particles is below 150 mcm. EFFECT: increased breakdown potential fire-extinguishing capacity in extinguishing burning flammable liquids. 2 cl, 1 tbl