AEROSOL-FORMING COMPOSITION FOR FIRE EXTINGUISHING AND A METHOD OF ITS MAKING Russian patent published in 1998 - IPC

FIELD: volume fire extinguishing. SUBSTANCE: pyrotechnical aerosol-forming composition has, wt.-%: potassium nitrate (specific particle surface 1500 cm²/g, not less) 67-72; fuel binding agent - phenolformaldehyde resin (average particle size is 15 mcm, not above) 8-12, and dicyandiamide as gas-aerosol-forming agent - the rest up to 100%. Composition can contain additionally potassium hydrocarbonate or potassium benzoate, or potassium hexacyanoferrite (specific particle surface is 500 cm²/g, not less) as gas-aerosol-forming component 4-12%. Composition is prepared as follows: solution of fuel binding agent in mixture with ethanol is prepared with acetone at ratio = (30-50):(70-50). The obtained solution is mixed with powder-like potassium nitrate and gas-aerosol-forming agent. Solution is fed at least by two doses by equal portions up to attainment of uniform distribution of all components by composition mass followed by drying and granulation of mixture. EFFECT: improved method of producing, enhanced effectiveness of composition. 3 cl, 2 tbl