FIRE-DISTINGUISHING POWDER COMPOSITION AND METHOD OF PREPARATION THEREOF Russian patent published in 1999 - IPC

FIELD: fire distinguishing. SUBSTANCE: composition contains, wt.-%: finely dispersed additive, preferably Aerosil, 0.8-3.5; flowability agent, preferably nepheline concentrate, 8.0-35.0; waterproofing organosilicon liquid, 0.008-0.28; basic component, the balance. The latter is at least one of the following compounds: potassium chloride, sodium chloride, ammophos, sylvinite, alkali or alkali-earth metal sulfate or phosphate, sodium bicarbonate, monoammonium phosphate, diammonium phosphate, and ammonium sulfate. For preparing composition, flowability agent and basic component are separately dried and ground and mixed with finely dispersed additive. When grinding flowability agent, it is made water-repellent by adding up to 1 wt % of waterproofing organosilicon liquid. EFFECT: reduced moisture absorption and caking of powder distinguishing by high efficiency in extinguishing fires of all categories. 17 cl, 1 tbl