Fluorosurfactant-free foam fire-extinguisher

Abstract

The present invention provides a foam fire-extinguishing agent devoid of environmentally harmful fluorochemical surfactant. The foam fire-extinguishing agent comprises a foamable synthetic surfactant consisting of (a) polyoxyethylene alkyl sulfate ester salt, and (b) at least either one of lauric acid amide propyldimethyl amino betaine acetate and lauric acid amide propylhydroxy sulfobetaine. This foam fire-extinguishing agent may further include at least either one of (c) polyoxyalkylenediamine having both terminal ends substituted with amino alkyl, and derivatives thereof, (d) polyoxyethylene coconut fatty acid monoethanol amide phosphate ester and (e) dodecyl alcohol. The foam fire-extinguishing agent is usable as both high- and low-expansion foam fire-extinguishing agents and in both seawater-diluted and freshwater-diluted forms while maintaining excellent performances such as water-retentivity within foams, durability to heat, liquid resistance allowing foams to stay on a burning liquid surface over an extended time-period, and flowability capable of covering over the burning liquid surface in a short time-period.

Description

technical field [0001] The present invention relates to a foam fire extinguishing agent that does not contain a fluorine-based surfactant, and in particular relates to a foam with enhanced heat resistance, improved water retention, and excellent fire extinguishing performance of any one of a high foam fire extinguishing agent or a low foam fire extinguishing agent, Synthetic surfactant foam fire extinguishing agent dilutable with both seawater and freshwater. Background technique [0002] In recent years, with the development of the chemical industry, not only non-water-soluble flammable liquids such as gasoline and naphtha, but also water-soluble flammable liquids such as alcohols, ethers, and esters have been increased in production and use. It also tends to be large-scale. Along with this, the risk of disasters such as fires increases, and emergency response at the time of disasters is also considerably difficult. [0003] In the past, as a fire extinguishing agent for ...

AI Technical Summary

Problems solved by technology

[0009] As a conventional foam fire extinguishing agent that can be used for both oil and alcohol, there is also a fluorine-based surfactant added to the hydrolyzed protein, but this fire extinguishing agent has poor storage properties due to the formation of precipitates due to changes in pH. Ineffective fire extinguishing of acidic water-soluble combustible substances such as acetic acid