SU1049253A1 - Release agent for forms - Google Patents

Abstract

LUBRICANTS FOR FORMS in the manufacture of concrete and reinforced concrete products, including waste mineral oil and an organic additive, characterized in that, in order to improve the quality of the concrete surface and ensure the use of lubricant at negative temperatures, it contains as an organic additive. , head 4 | C - NW WASTE Vacuum processing of a mixture of higher synthetic fatty alcohols in the following ratio of components, vol.%: Mineral waste, 50-70 oil Head fraction -to 23 wastes of vacuum processing i to a mixture of higher synthetic (L 30 -5A fatty alcohols

Description

4ib

from th

ate

The invention relates to the manufacture of reinforced concrete products, and, in general, to lubricants for metal forms. To prepare lubricants, solutions of viscous and solid petroleum products in light oil fractions are widely used. Among Hiix, petroleum solution in kerosene, in salted oil and IT.p. Also tfimeku pure and waste mineral oils. Known Smaek. L provide easy dismantling of products, but differ little viscosity, drain from the top of the form, form spots on the finished product. Known lubricant for forms {111 including, weight%: Acid synthetic acid emulsion 2O-25 Water solution of calcium oxide hydrate 75-80: The disadvantages of the known lubricant are insufficient stability, greater porosity of the vertical surfaces of products, inability to use at negative temperatures under polygon conditions . Closest to the invention is a lubricant for metallic forms in the manufacture of concrete and reinforced concrete products C2J, including waste mineral oil and an organic additive — low molecular weight polyethylene with a molecular weight of 4000-20000 with a wax content of up to 45% with a melting point of 200%. to the following ratio of components, wt.%: Used mineral oil 90-96 Low-molecular polyethylene 4-1O. However, this lubricant does not allow to obtain a high quality of the concrete surface, to use it at negative temperatures and provides for increased consumption of mineral oil. The purpose of the invention is to improve the quality of the concrete surface and to ensure the use of lubricant at low temperatures. This goal is achieved by the fact that the lubricant for furnaces and the manufacture of concrete and reinforced concrete products, including waste mineral oil and a qp additive, contains the head 31 as an organic additive (| C - Slaw waste mixture of a higher synthetic fat) alcohols in the following ratio of components, vol.%: Spent mineral oil 50-70 Head fraction С d-С2з waste vacuum processing of a mixture of higher synthetic fatty alcohols 30-5О Head fraction of waste, vacuum processing presented It is a mixture of fatty SP1FTs of the general formula CH3 (CH2) y, where L is 8-21. According to gas-liquid chromatographic data, the head fraction consists of the following alcohols,%: Decyl O, 7-1 Dodecyl 3-4 Tetradecyl 2-4 Hexadecyl 2O Octadecyl 16-18 Eccozyl3-5 Undecyl .3-4 Tridecyl3 Pentadecyl8-10 Heptadecyl20-22 Nonadecyl10 Geneicosyl2-3 Docoyl0,3-1 Tricosyl Synthetic fatty alcohols are a product of the catalytic oxidation of pa-inovine hydrocarbons. The head fraction of the synthetic fatty sp15) product is a solid white mass with a specific weight of less than 1, and so on. 50-60 seconds, insoluble in many organic solvents and soluble in mineral oils in all respects. It has a faint odor, non-toxic, neutral and gne-and explosion-proof. Spun, saline and transformer oils are used as waste mineral oil. The lubricant is prepared as follows. The head fraction of synthetic fatty alcohols is heated at 60-70 ° C about the liquid state and poured into the waste mineral oil, after which the mixture is stirred, then cooled at room temperature. Lubricant acquires a greasy consistency.

Depending on the viscosity of the used oil, the amount of synthetic fatty sp1-ITDB waste introduced varies. The lower the viscosity of the mineral oil, the greater is the amount of grease waste in synthetic grease.

Pri.A4ery lubricant composition, vol.%: Spent

Sh

70

60

50

Head

synthetic fractions

fatty alcohols ZO4O 50

The lubricant is applied to the mold using known techniques. Covering ability grease 8a-1OO g / m.

The proposed lubricant can be used for application to vertical forming surfaces, as well as under conditions of low and negative temperatures. At the same time, the adhesion of concrete to the form is eliminated, the high quality of the surface of the concrete is ensured (there are no stains and pores in the products. The lubricant is stable over time.

Claims (1)

LUBRICANT FOR FORMS in the manufacture of concrete and reinforced concrete 4 products, including waste mineral oil and an organic additive, characterized in that, in order to improve the quality of the concrete surface and ensure the use of lubricant at low temperatures, it contains the head fraction С ₁₀ - С _{2з of} waste from vacuum processing of the mixture as an organic additive higher synthetic fatty alcohols in the following ratio of components, vol.%: Waste mineral oil Head fraction ^C 10 ' ^C 23 waste vacuum processing a mixture of higher' synthetic fatty alcohols