Aerosol-forming composition for the purpose of extinguishing fir

Details Aerosol-forming composition for the purpose of extinguishing fir Aerosol-forming composition for the purpose of extinguishing fir

1998-07-21

2000-03-28

Miller, Edward A.

Explosive and thermic compositions or charges

Processes of making

292 5, C06B 2100

Patent

active

060426640

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 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.degree. C. The drying process is preferably performed at 40.degree. C. by means of circulating air.

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