FIRE-EXTINGUISHING COMPOSITION

摘要

A fire-extinguishing composition comprises an aqueous film-forming foam and an addition for suppressing a freezing temperature of the fire-extinguishing composition. An aqueous solution of a magnesium chloride hydrate is utilized as an addition. The components being used in the following ratio in volume percents by the total volume of the fire-extinguishing composition: an aqueous solution of magnesium chloride hydrate from 85 to 88 wt%; an aqueous film-forming foam the balance. The content of magnesium chloride in the fire-extinguishing composition is from 15% to 25% by weight of the fire-extinguishing composition. Organofluoric acid based foam formers may be utilized as an aqueous film-forming foam. The invention provides an increase in the efficiency of extinguishing the fire sites by means of a low-expansion foam and a decrease in the time needed for extinguishing the fire sites.