CZ2004915A3 - Mixture for producing solid wetting agent, intended particularly for adjustment of fire extinguishing water - Google Patents

Abstract

The mixture for the manufacture of a solid wetting agent used by fire extinguishing units for fire extinguishing water treatment is suitable for casting, extrusion or pressing. The mixture is characterized by a combination of polyethylene glycol and fluorinated surfactant in the amount of 1 to 20% by weight, together with the content of anioactive surfactants, which ensure high foaming strength of the extinguishing solution with good foam stability. At higher concentrations of the solution in solution, water and polymer film are formed on the surface of the flammable liquid.

Description

Technical field

The technical solution according to the invention relates to the composition of a composition for the production of a solid surfactant, particularly useful for the treatment of extinguishing water during fire fighting.

BACKGROUND OF THE INVENTION

To date, wetting agents are known in the form of cartridges based on a mixture of anionic surfactants with polyethylene glycol, containing surfactants of approximately 20 percent and 80 percent by weight of a polyethylene glycol, in particular a carrier, commonly referred to as a polyethylene glycol matrix. These surfactants are generally characterized by low solubility, resulting in a very low and often variable content of the active substances (surfactants) in the extinguishing solution. The surfactants used in such a low concentration, but not even in higher concentrations, do not lead to a satisfactory reduction in the surface tension of the water. For this reason, the resulting extinguishing solution has very low foaming power and also does not have the ability to form a continuous water or polymer film on the surface of the flammable liquid. Therefore, the use of an anionic surfactant-based solid surfactant, despite its advantages in storage, handling and application, is limited to a very narrow range of fire-fighting operations, excluding the possibility of extinguishing flammable liquids. For more complicated fire-fighting operations, liquid foaming agents known as AFFF-AR (Aqeous Film Forming Foam - Alcohol Resistant) must be used to achieve the desired effects, with significantly higher technical and economic demands for fire protection and negative environmental impacts on the environment.

The essence of the technical solution

These disadvantages of a solid surfactant based on a mixture of anionic surfactants and polyethylene glycol are largely overcome by the novel formulation of the mixture used to produce solid blocks. It is an object of the invention to add fluorinated surfactants to the composition at the expense of the content of polyethylene glycol which serves as a matrix. By reducing the proportions of polyethylene glycol, which in itself is not surface-active enough, there is room for incorporation of a larger amount of another type of active ingredient into the mixture and also improves the solubility of the solid blocks. Hasební

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44 44 44 44 4 The solution, prepared by dissolving a solid block from a new composition with a reduced polyethylene glycol content in a special application technique (nozzle or admixture), has qualities close to that of a conventional AFFF-AR type liquid foamer. The advantage of solid blends according to the new recipe lies in the possibility of using the product in conditions much more demanding for the extinguishing effect, and in particular utility properties, in particular higher foaming and film formation, compared to the use of conventional solid blends only with anionic surfactants. Another advantage is the environmental friendliness of the solid surfactant produced from the composition of the present invention, while attaining excellent utility properties and a fire extinguishing effect, which in some specific applications appears to be superior to the mere expected additive effect of using different types of surfactant in the composition. The extinguishing water does not get into the environment as much of the environmentally resistant fluorinated substances as in the case of the use of AFFF-AR liquid foaming agents.

Exemplary embodiment

An example of a particular embodiment of the present invention is a solid surfactant composition comprising one or more fluorinated surfactants, one or more anionic surfactants and polyethylene glycol, a particular example of the composition comprising:

- 20% fluorinated surfactants

5-20% sodium dialkylsulfosuccinate

10-40% of linear sodium alkyl benzene sulfonate and to form a matrix

- 60% polyethylene glycol

One or more fluorinated surfactants are used in the composition in the form of a solution, a concentrated solution, a concentrate or a solid. In particular, the compounds are: perfluoroalkyl amine oxides, perfluoroalkyl pyridinium salts, perfluoroalkyl betaines, perfluoroalkyl sulfonic acids or salts thereof, perfluoroalkyl ethoxylated alcohols, amphoteric fluorinated polymers, fluorinated telomers.

Polyethylene glycol of different molecular weight can be used, which allows to set the softening point of the mixture and at the same time the intensity of dissolution of the cartridge in the applicator device. For the purposes of the solution of this patent, it is considered the use of the most efficient polymer to be the most effective in the range of s polyethy polyethy polyethy polyethy polyethy polyethy polyethy polyethy polyethy -8000.

The mixture is homogenized by heat in a temperature range of 50-150 ° C, and the formation of a solid block (cartridge) is performed by casting, extrusion or pressing (hot or cold).

Industrial applicability

The solid surfactant composition of the present invention is useful in the manufacture of blocks that serve to treat fire extinguishing water to extinguish fires in order to improve its fire extinguishing properties.

Claims (4)

PATENT CLAIMS 1. A composition for the production of a solid extinguishing water treatment surfactant consisting of at least three substances, comprising polyethylene glycol and at least one anionic 5. A surfactant comprising at least one fluorinated surfactant in the range of 1 to 20 weight percent. 2. A composition for the production of a solid extinguishing water treatment surfactant consisting of at least three substances, containing polyethylene glycol and at least one anionic 10. The surfactant of claim 1 wherein the molecular weight of the polyethylene glycol is in the range of 1000-8000. 3. A composition for the production of a solid extinguishing water treatment surfactant consisting of at least three substances, comprising polyethylene glycol and at least one anionic The surfactant of claim 1 or 2, wherein the amount of polyethylene glycol in the composition is in the range of 40-60 weight percent. 4. A composition for the production of a solid extinguishing water treatment surfactant consisting of at least three substances, comprising polyethylene glycol and at least one anionic The surfactant of claim 1 or 2 or 3 wherein the total amount of surfactants in the composition is in the range of 5-60 weight percent.