SU1095911A1 - Froth-generating composition for fighting fire - Google Patents

Description

WITH

ate

The invention relates to fire extinguishing compositions, namely foam-forming compositions, and can be used in extinguishing fires in mines, as well as in other areas of national economy. A foaming composition is known, consisting of 1 wt. sodium lauryl sulfate and 1.4 wt. polyacrylamide. This composition is introduced into a moving stream of water and I obtain a foam in a known manner C1. The foam obtained is stable for a long time, but is mainly intended for extinguishing hot liquids with a specific gravity of less than one. Also known is a fire extinguishing agent based on an apkylsulphate foam with the addition of higher fatty alcohols (preferably lauric) in the amount of 1-10 wt.% With respect to alkyl sulfate C 2 as a stabilizer of the foam. derived from them. Closest to the proposed technical essence and the achieved result is a foaming agent C31, which contains, wt%: Anionic; Compounds 20-40 Fatty alcohol1.0-6.0 Sodium salt of methyl methacrylate copolymer with methacrylic acid 0.5-2.5 Water51.5-78.5 A disadvantage of the known composition is that foam of relatively small extinguishing efficiency is generated from it, as well as low multiplicity due to the high viscosity of the foaming composition. In addition, the stability of such a foam is negligible. The purpose of the invention is to increase the stability of the foam, its multiplicity and fire extinguishing efficiency. This goal is achieved by the fact that in a foam composition a composition containing alkyl sulfates of higher fatty alcohols, a higher fatty alcohol fraction, a high molecular weight polymer and water, these components. Taken in the following ratio, wt.% Alkyl sulfates of higher fatty alcohols Higher fatty alcohol 4,5-5,5 fractions, High molecular weight 0,018-0,02 polymer Else The proposed ratio of components allowed to improve the basic operating parameters of the generated foam. The method for preparing the foaming composition is as follows. Higher fatty alcohol fraction C. d-Su. Pre-dissolved with stirring and the temperature of B-ZO C in alkyl sulfate higher fatty alcohols such as Progress. A water soluble high molecular weight polymer like sodium salt of methyl methacrylate copolymer with methacrylic acid or AMP polyacrylamide is dissolved in water with stirring and at a temperature of 50 ° C. Then both prepared solution are mixed. The invention is illustrated by the examples given in Table 1. When carrying out comparative tests, 5% aqueous solutions of the proposed MeE and of their compositions were prepared, for the preparation of which the same alcohols and polymer were used. Foam was obtained on the grids of the foaming agent with forced air flow. The test results are given in table 2. As can be seen from the table. 2, the foam obtained from the proposed composition has a greater multiplicity (7-35 times) and stability (7-20 times); fire extinguishing efficiency is also improved (2 times). Table Alkyl sulfate of higher fatty alcohols of type Progress 70 Higher fatty alcohol of fraction 18 4.5 Sodium salt of methyl methacrylate copolymer with methyryl acid o, 018 0.020 0.022 24.980 29.478 25.482 T a l and c a 2

1095911

Continued table. 2

350 300 10

50

Resistance - 3600 4000 4000 200 570 foam capacity (destruction time 25% of the foam volume), s

Fire extinguishing effect- 22

20

22

40 54 vigor (time tushe-, nn standard hearth

fire) with

Claims (1)

(5.4.) FOAMING COMPOSITION FOR FIRE EXTINGUISHING FIRE, including alkylsulfates of higher fatty alcohols, higher fatty alcohol of fraction C _{1 (j} -C, high molecular weight polymer and water, characterized in that, in order to increase the stability of the foam, its multiplicity and fire extinguishing efficiency, it contains components in the following ratio: Alkyl sulfates of higher fatty alcohols Higher fatty alcohol Fractions with ₁₀ -С _1В High-molecular polymer '0,018-0,0 Water The rest of May.%: > 65-70 4,5-5,5