Aerosol-forming composition for the purpose of extinguishing fires and method for the preparation of this composition

摘要

The present invention relates to a pyrotechnical, aerosol-forming composition for the purpose of extinguishing fires in confined spaces, containing potassium nitrate in a quantity of 67-72% by mass, phenolformaldehyde resin in a quantity of 8-12% by mass and dicyandiamide as the balance, wherein the particles of the potassium nitrate comprise a maximum average diameter of 25 mu m, the particles of the phenolformaldehyde resin comprise a maximum average diameter of 100 mu m and the particles of the dicyandiamide comprise a maximum average diameter of 15 mu m. A further object of the invention is a method for the preparation of the composition, which can be manufactured in conventional installations, by preparing a phenolformaldehyde solution using a mixture of ethyl alcohol with acetone in a ratio of 30-50:70-50 and by mixing and subsequently granulating during the drying process at 20-70 DEG C. The drying process is preferably performed at 40 DEG C. by means of circulating air.