SU929125A1 - Foam agent for extinguishing fire - Google Patents

Description

(FOAM EXTINGUISHING FIRES

I

FIELD OF THE INVENTION The invention relates to fire extinguishing, in particular, to blowing agents for extinguishing fires of flammable liquids, including alcohols.

Known foaming compositions for extinguishing fires of polar fluids based on synthetic surfactants containing polymeric additives that create a separating gel-like film at the interfacial interface of the foam-alcohol, which to a certain extent protects the foam from the solvent and thereby increases the time of the foam on the surface of the alcohol. Most compounds use natural high-molecular compound — alkaline or heavy metal alginate 3 for this purpose. These compounds are recommended to be used for extinguishing fires with ethyl alcohol, but because of the insufficiently high stability of foams on alcohols, the effectiveness of such compositions is unsatisfactory. In addition, solutions

with the addition of alginate salts, they are stratified during storage, which makes them unsuitable for automatic fire extinguishing systems. Working solutions of these blowing agents quickly lose their properties over time.

Also known is a compound for extinguishing fires of polar liquids based on synthetic surfactants with additives of cream 10 inorganic and fluorinated surfactants. This formulation is multi-component. One of the main components of this composition is a polymeric compound (thixotropic polysaccharide 15), which, when mixed with octal components, forms a gel-like gel structure. Foams based on such compounds have good resistance to the action of alcohols and

X is not destroyed for a long time on their surface 1,2 J.

However, high viscosity makes it difficult to dissolve the foaming agent in water and prevents it from being dispensed on existing fire equipment that is not designed to supply gel-like liquids. Lime is also a foamable composition based on perfluorinated surfactants with additives of polymeric organosilicon compounds that increase foam resistance to ethyl alcohol and other lower alcohols 31. However, this composition does not contain medium-expansion foam, which makes it difficult to use it in modern fire extinguishing installations, except th, .srok storage of soy tava low due to hydrolysis of organosilicon compounds in aqueous solutions. The closest to the frother of the present invention is a composition based on anion-active compounds and a stabilizing lena organic additive. The high stability of the foams of these compounds is provided by the presence of 0.070.2 wt.% Sodium salt of polyacrylic acid t1 as an additive. The disadvantage of the known composition is the low resistance of foams to the action of ethyl alcohol, on the surface of which the foam lasts for 10 seconds. The purpose of the invention is to increase the stability of foams to the action of ethyl alcohol.

Monoethanolamino.va sol-polyacrylic acid

Claims (3)

1. Foaming agent to extinguish water, distinguishing. being so 1 fires, including alkylarylsulfo-which, in order to increase stability. The goal is achieved by the fact that a blowing agent containing alkylaryl sulfonates, a salt of polyacrylic acid and water, additionally contains an organofluorine compound with the following content of ingredients, weight .: Alkylarylsulfonates,. 25.0-30.0 Polyacrylic acid salt2.0-6.0 Organofluorine compound, 1.5-6.0 Water Else As the salt of polyacrylic acid sodium, potassium, ammonium, mono- or diethanolamine salt is used, and organofluorine compound is a compound of the following formula (3). . Jci g.CONHC H N 1,011 The table shows the results and tests of the stability of the foam obtained from the proposed and well-known frothers. From the data in the table it can be seen that the stability of the foam obtained from the proposed composition is 5-20 times higher than the stability of foams from known foaming agents. foaming at extinction of ethanol, it additionally contains a fluorine compound of formula X C.R, COMIC II N 3V  IT in the following ratio of components, weight L Alkylaryl sulfonates25, 0-30.0 Polyacrylic salt acid2.0-6.0 Fluororganic connection 1,5-6,0 WaterEverything 291256. 2. The foaming agent according to claim 1, which is characterized in that it contains potassium, sodium, 5 ammonium, monoethanolamine or diethanolamine salts as the salt of polyacrylic acid. Sources of information taken into account in the examination one . German patent If, 10 cells. 61 in, 2, pub. 1957. 2. US Patent H, cl. 252-3, pub. 1977. 3. The patent of Germany No. 1812531, cl. 61 in, 2, pub. 1968. 15 Ts. USSR Author's Certificate No. 11022, cl. And 62 D 1/02, 1972 (prototype).