SU1011136A1 - Fome former for fire-fighting - Google Patents

Abstract

FOAM FOR EXTINGUISHING FIRES, including a perfluorinated cationic surfactant of the formula Cl, CONHC3H N (CH3) 2 and water, characterized in that, in order to increase the fire extinguishing efficiency, (M. The following ratio of components. wt.%: Perfluorinated cationic surfactant 3-50 N N-tetra-2-OX1 Ypropyl-ethylenediamine 2-20 V ° D Rest

Description

WITH

The invention relates to the fire extinguishing of flammable liquids and solid materials, in particular, to foaming agents based on perfluorinated surfactants (PIVs). Foaming agents are known based on cationic, anionic, ampholytic and nonionic perfluorinated surfactants. The advantage of such formulations lies in the formation of a perfluorinated surfactant on the burning surface of the liquid of a thin film, impermeable to vapor pressure and protecting the foam from collapse. . A composition containing a cationic perfluorinated surfactant is known, the stabilizer is a non-ionic surfactant and WOOD 1 The closest in base to the element (perfluorinated surfactant) and achievable; The result to the proposed gelling foaming agent is a composition comprising a cationic perfluorinated surfactant of the formula CQF -jCONHCjHtjNCCH,) CH2CH20H and water C2.3. However, these compounds are not sufficiently effective. The purpose of the invention is to increase the fire extinguishing efficiency of the blowing agent. This goal is achieved by the fact that a foaming agent containing a cationic organofluorine surfactant of the formula (,, CONHC3Hj, N. (CH3) 2 CH2CH20HJ, and water, additionally contains n ionogenic non-fluorinated surfactant N N-TeTpa-2-hydroxypropyl-ethylenediamine with the following components , Bec.% J Organofluoric compound 3-50 Non-fluorinated compound, 2-20 Water Else to 100 Foaming agent is prepared by dissolving the components in a given ratio with water while stirring. The prepared foaming agent is a transparent, homogeneous, non-separating . Iys solution without extraneous mechanical inclusions are used for extinguishing fires b% tnye aqueous solutions of foaming agent The test results are known and the proposed compositions are presented in the table..

1 2 3 4 5 6

50

50

12

b

3

3

7

b rototype

As can be seen from the table, the fire extinguishing efficiency of the proposed blowing agent is 10-40% higher than that of the known. The lowest critical flow rate is 0.10 0,012 0,009 0,009 0,012 0,012 0,013

A ratio of fire-extinguishing efficiency is observed in formulations containing 6–12% of organofluorine surfactant and b% of non-fluorinated 65 surfactant and is equal to 0.009. 3 The proposed composition is not difficult to manufacture. It can be prepared on existing equipment. 1011136 To obtain foam may be. used standard equipment.

Claims (2)

FOAM EXTINGUISHER FOR FIRE FIGHTING, including perfluorinated cationic surfactant of the formula C _B F _n C0NHC ₃ H _fe N (CH ₃ ) ₂ Cl CIljCH Oil and water, characterized in that, in order to increase fire extinguishing efficiency, it additionally contains N-tetra-2-hydroxypropyl-ethylenediamine in a ratio of components. Perfluorinated Cationic Surfactant N Ν-tetra-2-hydroxypropyl-ethylenediamine Water of the following wt.%: 3-50 2-20 Rest Sae