A - Human Necessities – 62 – D
Patent
A - Human Necessities
62
D
A62D 1/02 (2006.01) A62C 5/00 (2006.01) A62D 1/06 (2006.01) C06D 5/08 (2006.01)
Patent
CA 2203986
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 µm, the particles of the phenolformaldehyde resin comprise a maximum average diameter of 100 µm and the partides of the dicyandiamide comprise a maximum average diameter of 15 µm. 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° C. The drying process is preferably performed at 40° C by means of circulating air.
Composition pyrotechnique formant un aérosol pour combattre des feux dans des espaces confinés; elle renferme 67 à 72 % en poids de nitrate de potassium, de 8 à 12 % en poids d'une résine de phénolformaldéhyde et le reste sous forme de dicyandiamide; les particules de nitrate de potassium, de résine de phénolformaldéhyde et de dicyandiamide ont respectivement un diamètre maximal moyen de 25, 100 et 15 microns. Autre objet de l'invention : méthode pour préparer la composition, laquelle peut être obtenue dans des installations classiques, par préparation d'une solution de phénolformaldéhyde à l'aide d'un mélange d'alcool éthylique et d'acétone dans des proportions de 30-50:70-50, avec mélange et granulation ultérieure pendant le processus de séchage à 20-70 degrés C. Le séchage est effectué de préférence à 40 degrés C par circulation d'air.
Andreev Vladimir Andreevitch
Kozyrev Valeriy Nikolaevitch
Sidorov Alexey Ivanovitch
Yemelyanov Valeriy Nilovitch
Mcfadden Fincham
R-Amtech International Inc.
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