RU2003103760A - METHOD FOR PRODUCING FIRE EXTINGUISHING POWDER - Google Patents

Claims (3)

1. A method of producing a fire extinguishing powder, including additional hydrophobization of highly dispersed silicon dioxide, mixing it with sodium bicarbonate, a water-insoluble mineral or a mixture of minerals, and then grinding the finished product in an impact mill to a particle size distribution — mass fraction of powder under mesh No. 005 according to GOST 6613- 86 not less than 40%, characterized in that the additional hydrophobization of silicon dioxide is carried out by a hydrophobizing silicone fluid, which is a polymer of ethyl hydrosilicon ana, and mixing of the components is carried out at the following component ratio, wt.%: 40-70 sodium bicarbonate, hydrophobic fumed silica 0.5-5, the water-insoluble mineral or mixture of minerals rest. 2. The method according to claim 1, characterized in that talc, magnesium oxide, talc-magnesite, calcium, magnesium carbonates and mixtures thereof, including natural minerals - dolomite, calcite, chalk, magnesite are used as a water-insoluble mineral or mixture of minerals , natural phosphorites (apatite, fosmuka). 3. The method according to claim 2, characterized in that as a hydrophobizing silicone fluid, which is a polymer of ethylhydrosiloxane, a marketable product of OJSC "Silan" in Dankov, Lipetsk region is used. grade 136-41, manufactured according to GOST 10834-76 with amendment 1-3, which is a colorless or slightly yellow liquid without mechanical impurities with a mass fraction of active hydrogen of 1.30-1.42%, by reaction of the medium (pH of an aqueous extract) 6- 8, hydrophobizing ability of at least 3 hours