Aerosol-forming composition for the purpose of extinguishing fir

Explosive and thermic compositions or charges – Structure or arrangement of component or product – Particles of diverse size or shape

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149 191, 1491096, 252 5, C06B 4502

Patent

active

058312099

ABSTRACT:
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 have a maximum average diameter of 25 .mu.m, the particles of the phenolformaldehyde resin have a maximum average diameter of 100 .mu.m and the particles of the dicyandiamide have 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.degree.-70.degree. C. The drying process is preferably performed at 40.degree. C. by circulating air.

REFERENCES:
patent: 3608641 (1971-09-01), Cottrell
patent: 4251699 (1981-02-01), Wiltgen
patent: 4386979 (1983-06-01), Jackson
patent: 5423384 (1995-06-01), Galbraith et al.
patent: 5593485 (1997-01-01), Wang
patent: 5610359 (1997-03-01), Spector et al.
patent: 5613562 (1997-03-01), Galbraith et al.

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