SU982703A1 - Foam forming composition for fire extinguishing - Google Patents

Description

one

This invention relates to foaming agents for the manufacture of air-mechanical foam used in fire fighting.

Foaming agents are known on the basis of surfactants, when dissolved, in which sea water forms a stable foam.

Known composition of the foaming agent containing a fluorinated surfactant, a non-fluorinated surfactant having a freeze hydrocarbyl group Cg-C. to improve foaming, as well as additives for various purposes 1.

However, the concentration of the deficient fluorinated surfactant in seawater, which provides high foam quality, is relatively high.

Known foaming agent, including 20 soluble in water salt of fatty aliphatic amine or polyamine, aliphatic radical, which contains 11 -18 carbon atoms, foam stabilizer - fatty alcohol and organic solvent 2.,

The disadvantage of the composition is a high concentration of surfactant, in addition, the stability of the foam obtained from its solution in sea water. Is small.

The closest to the main component and the achieved result to the proposed is a frother containing, by weight. %; synthetic surfactant 70-75; foam stabilizer - a mixture of aliphatic fatty alcohols of the Cue-Cie fraction and fatty acid amine oxide - R-LO (CH3) 2 (where R is a mixture of Cyu-Cs fatty acid) and as a solvent and agent for lowering the freezing point of the concentrate - glycol, glycol ether or lower alcohol 23-25. A 370 solution of a concentrator in sea water gives a resistant PES3.

A disadvantage of the known foaming composition is a high concentration of surfactant.

The purpose of the invention is to reduce the concentration of the surfactant while maintaining a stable foam.

The goal is achieved by the fact that the composition of the blowing agent containing a surfactant, foam stabilizer and sea water contains monoamine aluminum chloride as a stabilizer with the following content of components, wt.%:

Surface active

substance0.05-0.10

Aluminum chloride monoammoniac 0.80-1.50

Sea waterEverything else

The formulation is prepared by sequentially injecting dosage amounts of a stabilizer and surfactant into seawater.

For the preparation of specific examples of the composition, a 26–29% solution of refined sodium alkyl aryl sulfonate (PO-1D foaming agent, TU 3810789-76), aluminum chloride monoammoniac (95% purity) and sea water containing 4% salts were used. FR 42883/74) ..

The table lists the test results of the proposed and known compositions.

It can be seen from the table that the concentration of the surfactant in the proposed composition is 20-40 times lower than in the well-known one, and the stability of the foam is maintained at the level of the known composition. Due to the lower concentration of surfactant, the degree of pollution is reduced to the environment, which is an additional advantage of the proposed composition.

The rest is sea water for secondary alkyl sulfates for similar results.

Claims (3)

Invention Formula The composition of the foaming agent for fire extinguishing, including a surfactant, foam stabilizer and sea water, characterized in that, in order to reduce the concentration of surfactant while maintaining stable foam, it contains mono amiamate aluminum chloride as a stabilizer at the following ratio of components, weight .%: Surface active substance0.05-0.10 Monoamnac chloride aluminum 0.80-1.50 SeawaterOther base-PO-2A and PO-ZA received 56 Information sources, 2. Patent of France, No. 2043247, taken into account during examination. And 62 D, fringe. 1970. 1. US Patent No. 4038195, cl. 252-3, 3. Patent of Germany No. 1959798, publish 1977.cl. 61 In 2, pub. 1972. - 982703