SU1715623A1 - Mixture for surface dressing - Google Patents

Abstract

The invention relates to the building materials industry and can be used in the manufacture of decorative finishing products. In order to increase the durability of the textured layer with fine-grained aggregate and the uniformity of exposure, the composition for treating the surface of the product contains, in wt.%: Industrial oil 42-46; stearin or paraffin 5-7; filler 5-7; technical drill 16-19; polyacrylonitrile 26-29. The resulting surface of the product is smooth, even without pores and cavities with fine-grained texture and color-dynamic activity, which visually changes in the daily and seasonal periods. Frost resistance 200 cycles, the degree of opening 0.7-1.0 mm. 2 tab.

Description

The invention relates to the building materials industry and can be used in the manufacture of decorative finishing products.

A known composition, including wt.%: Paraffin 5-10; talc 10-15 and industrial oil - the rest.

The above composition does not sufficiently slow down the hardening of the cement and plaster film in the contact layer, as a result of which a decorative effect on the surface of the product is not achieved, and the surface itself is characterized by relatively low durability.

Closest to the present invention is a composition for treating the surface of building products, comprising wt.%: Borax 14-16, dextrin 32.2-36.8; poly-acrylonitrile 2-6; surfactant 0.1-0.3; water.- the rest.

This composition is an aqueous system, which makes it difficult to create thin films for minimal texture penetration during the production of a fine-grained textured surface. In addition, careful preparation of the metal surface of the molds is necessary, and in the production of embossed surfaces (in the case of plastic molds) this composition, due to poor adhesion, does not allow to obtain a high-quality surface of the product with high durability.

The purpose of the invention is to increase the durability of the textured layer with fine-grained aggregate and the uniformity of exposure.

The goal is achieved by the fact that the composition for treating the surface of products on a mineral carrier, including a technical borax, polyacrylonitrile, a solvent and an additive, additionally contains a mineral filler, industrial oil as a solvent, and as an additive stearin or paraffin

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the following ratio of components, wt.%:

Technical Drill16-19

Polyacrylonitrile26-29

Industrial oil42-46

Stearin or paraffin5-7

Mineral filler5-7

The lubricant is prepared as follows.

Paraffin or stearin is introduced into the heated oil, mixed, and borax and polyacrylsitrile with a filler are added to the cooling mixture with continuous stirring. After cooling, the mixture acquires the consistency of a ready-to-use lubricant. Apply grease by hand.

Before laying the concrete mix, the surface of the mold is lubricated with the grease. At a flow rate of 40-50 r / m2, it provides products with a weakened surface film, the removal of which reveals a decorative texture. Molding products carried out on conventional equipment. The products are steamed. According to the received regime. After the removal of the form, the product enters the post, where the surface layer is saturated with water by irrigation and mechanically applied to the surface with a metal brush, followed by washing the surface with a 3-5% hydrochloric acid solution and water.

The invention is illustrated by examples, the compositions of which are given in table. 1. The test results are presented in Table 2.

FORUMAWLAH AND ISLANDS

A composition for treating the surface of products on a mineral in a mold when exposing a decorative filler of the textured layer, including a technical drill, polyacrylonitrile, a solvent and an additive, characterized in that as a solvent industrial oil, as an additive stearin or paraffin and additionally mineral filler in the following ratio of components,

Technical Drill16-19

Polyacrylonitrile26-29

Industrial oil42-4 6

Stearin or paraffin5-7

Mineral filler5-7

thirty

Table 1

table 2

Claims (1)

Claim Composition for treating the surface of products on a mineral binder during molding with exposing the decorative aggregate of the texture layer, comprising a technical borax, polyacrylonitrile, solvent and additive, characterized in that, in order to increase the durability of the texture layer with fine-grained aggregate and uniformity of exposure, it contains as solvent industrial oil, as an additive, stearin or paraffin and additionally a mineral filler in the following ratio of components, Technical drill 16-19 Polyacrylonitrile26-29 Industrial oil 42-4'6 Stearin or Paraffin 5-7 Mineral filler 5-7 30 table! I Name of components Contents, May. % 1 2 3 4 ! And industrial oil (GOST 20799-75) And 20 A. 42 And 8 A 44 42 And 40 A 46 Stearin (GOST 6484-64) 5 5 Paraffin (GOST 23683-79) 7 6 Talc (GOST 21234-75) 5 Kaolin (GOST 21286-82) 7 ' 6 Chalk (GOST 12085-88) 5 Technical drill (GOST 1060-71) 19 16 17 18 Polyacrylonitrile (TU-01-68) 29th 26 27 28 table 2 Physico-mechanical properties 1 2 Visual characteristic of the surface Number of freeze and thaw cycles The degree of opening, mm A smooth, even surface without pores and shells with a fine-grained texture and color-dynamic activity, which the viewer, but changes in the diurnal and seasonal period 200 - A smooth, even surface without pores and shells with a fine-grained texture and color-dynamic activity, which visually changes in the daily and seasonal periods 200 0.9 Examples 3 4 Famous A smooth, even surface without pores and shells with a fine-grained texture and color-dynamic activity, which visually changes in the diurnal and seasonal periods 200 0.7 A smooth, even surface without pores and shells with a fine-grained texture and color dynamic activity, which visually changes in the diurnal and seasonal periods 200 0.9 Large areas of excessive exposure of the aggregate with its loss, violation of the decorative effect The surface layer is broken due to partial precipitation of fine aggregate • 1.5