RU1825367C - Compound for desiccating hard surfaces - Google Patents

Abstract

SUMMARY OF THE INVENTION: a composition for draining a solid surface contains a synthetic fatty alcohol of the St-Cie fraction, 2-4%, alkylimidazoline 0.05-0.15%, hydrocarbon up to 100%. The composition contains alkylimidazoline and synthetic fatty alcohol fractions in a mass ratio of 1: 26-40. As a hydrocarbon, the composition contains a hydrocarbon with a boiling point of 100-200 ° C. 2 C.p. f-ls, 1 tab.

Description

The invention relates to means for treating a hard surface, in particular for drying the surface of wet glass products by displacing water residues after cleaning in aqueous solutions.

The purpose of the invention is to increase the rate of water displacement and the degree of surface drainage.

This goal is achieved by the fact that fatty alcohols are additionally introduced as a de-emulsifier into the water-displacing composition for drying containing a surfactant and a solvent. as a surfactant, alkylimidazolines, and as a solvent, saturated hydrocarbons with a density of less than 1000 kg / m and a boiling point of mainly 100-200 ° C, the following ratio wt.%:

Fatty Alcohols St-Cie

Alkylimidezolines Hydrocarbons

with components

2-4

0.05-0.15 to 100

In this case, the ratio between the surfactant and the demulsifier is 1: 26-1: 40.

The components included in the composition fulfill certain functions, and the necessity of using each of them to achieve the set goal has been proved experimentally.

Surfactants such as Pepazolin 10-16A (TU 38.407238-83), Bipan (TU 38.507-63-055-89), alkylimidazolines obtained by the reaction of higher aliphatic alcohols and polyethylene polyamines, are introduced into the water-displacing composition as a strong adsorbent. They are a viscous liquid from light yellow to dark yellow.

Since this class of surfactant is poorly soluble in hydrocarbons, fatty alcohols are used to better dissolve them.

Fatty alcohols of the C; -Se fraction (GOST 19652-89) or the Su-Si fraction (TU 38.10730-82). or fractions of Syu-Cia (GOST 13937-86)

they are a transparent oily liquid with a density of 780-830 kg / m3 and are classified as moderately hazardous substances (hazard class 3).

Fatty alcohols are used not only as a co-solvent, but also as a demulsifier preventing the emulsification and dispersion of displaced EODA.

It should be noted that the desired drying effect is achieved in the established optimal ratio between the surfactant and demulsifier, which is in the range 1 / 26-1 / 40.

Saturated hydrocarbons with a density of less than 1000 kg / m3 and with a boiling point of mainly from 100 to 200 ° C, for example, white spirit or Nefras C4-155 / 200 (GOST 3134-78, GOST 998015-86), are used as a solvent Nefras S 150/200 (TU 38.1011026-85), etc. They contribute to a uniform and rapid displacement of water from a solid surface and its subsidence at the bottom. The dehydrated parts are drawn from the composition and dried in air from residual solvent. It is also important that the hydrocarbon solvents used are significantly safer in their toxicity than halide hydrocarbons.

According to the existing classification, these solvents belong to hazard class 4, their maximum permissible concentration in the air of the working zone is 300 mg / m, and the volatility in xylene is from 2.5 to 4.5.

Recommended boiling points for hydrocarbon solvents are from 100 to 200 ° C, since at a boiling point below 100 ° C the solvent evaporates quickly from the dewatering tank and the composition loses its properties. In addition, ambient air pollution occurs. A hydrocarbon solvent with a boiling point above 200 ° C, after removing the glass from the water-displacing composition, does not evaporate well from the surface of the product, remaining on it as a greasy coating.

The proposed composition is obtained by mixing the starting components at 40-50 ° C in any sequence in the apparatus with a stirrer. In appearance, a clear liquid is obtained from white to yellow.

When preparing a water-displacing composition, no gas emissions into the atmosphere and no waste products to wastewater are generated.

In order to compare the effectiveness of the wetting formulations, a drying rate indicator, i.e. the time

completely displacing water from the wet surface of polished glass (or a metal plate). The second indicator for comparison is the quality indicator

dehydration, estimated in% by the degree of drainage of the surface.

The following examples describe comparative test data on the rate of water displacement and the degree of dewatering of glass and metal surfaces at the minimum, average and maximum contents of the components of the claimed composition with a known (prototype) and base sample (see table).

Tests of water-displacing solutions were carried out at 20-25 ° C. Efficiency assessment was carried out by the time of complete displacement of water from the surface as follows. Pure solid plates (glass or metal) 20 x 40 mm in size were immersed in distilled water, removed, and the continuity of the aqueous film on the surface was determined. Then, the wet plate was vertically dipped into a water-displacing solution in a transparent container and the time of complete displacement of water was recorded.

After that, the plate was removed and the amount of remaining water and, accordingly, the area of the dried surface were visually determined under a microscope.

The found optimum ratio between the components in the water-displacing composition allows reducing the time of water displacement from a solid surface to 19-22 s and, accordingly, increasing the processing productivity.

As can be seen from the table, a decrease in the ratio between the components (lower than the lower one) leads to an increase in the time of water displacement, reduces the speed of displacement and the degree of surface drainage. With an increase in the limit ratio (above the upper), the achieved

indicators do not increase, therefore, a greater consumption of components is impractical.

The proposed composition, as shown in the table, exceeds the prototype and the basic imported sample - dehydrating oil Devater (Germany) in terms of main indicators of use. The use of the claimed composition will completely abandon currency

purchases of Devater oil and similar products.

The proposed water-displacing composition relates to low toxicity products.

Claims (3)

SUMMARY OF THE INVENTION 1. A composition for drying a solid surface comprising a surfactant and a solvent, characterized in that, in order to increase the rate of water displacement and the degree of surface drainage, the composition contains alkylimidazoline as a surfactant, it contains hydrocarbon as a solvent with a density of less than 1000 kg / m3 and additionally contains synthetic fatty alcohol fractions St da in the following ratio of components. wt.%: SRD "mit" lm ISLMTL DYM pomrkmes cornfield Synthetic fatty alcohol fraction St-Cie 2-4 Alkylimidazoline 0.05-0.15 Hydrocarbon 100. 5 2. The composition according to claim 1, wherein the om contains alkylimidazoline and synthetic fatty alcohol of the Cr-Cie fraction in a weight ratio of 1: 26-40. 10 3. The composition according to claim 1. characterized in that it contains a hydrocarbon with a boiling point of 100-200 ° C as a hydrocarbon. in odes esn vdikh komoaptsmy on tmrloy 2.0 3.0, 0 0.05 0.1 0.1 $ 0.01 0.25 1, 0 5.0 g, o.s.o. k.t 1, o 5, o.o. At-at-siri 97.95 9.9 95, b5 98, 34.75 37.55 96.0 95, 5 # .99 S, 75 97.95 9.9 5. “5 97.JJ H.J S.“ 5 J, .9 il Jefras from 150 / goo Him Yar 120/200 or not "oh" with Hi 150/180 Correspondence "neither" isad surfactant and deenul gvtor 1:40 1:30 1: 2t 1: 100 1:20 lidO 1:30 1:26 1: 100 1:20 tt) 0 Ittf 1:40 It) llM 1:50 1:50 (tvtildi “URIL MMENMY Iapozoz 0.05 0.1 g.o. 5. - 1.0}. ", 0 - 5. to 1 ti