Explosive and thermic compositions or charges – Structure or arrangement of component or product – Particles of diverse size or shape
Patent
1997-04-24
1998-11-03
Miller, Edward A.
Explosive and thermic compositions or charges
Structure or arrangement of component or product
Particles of diverse size or shape
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.
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Andreev Vladimir Andreevitch
Kozyrev Valeriy Nikolaevitch
Sidorov Alexey Ivanovitch
Yemelyanov Valeriy Nilovitch
Miller Edward A.
R-Amtech International, Inc.
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