SU1150065A1 - Method of preparing composition for impregnating wood - Google Patents

Abstract

METHOD FOR PREPARING THE FORMULATION FOR WOOD, which includes mixing and heat treatment of mineral oil and thickener, characterized in that, in order to improve the antifriction properties and increase the dimensional stability of impregnated wood, as a thickener, tar oil of technical oil and technical fat and the second group oxide chemical elements, the mineral oil being premixed with vegetable oil tar at 100-130 ° C, then metal oxide is added at The following ratio of components, wt.%: Mineral oil 10-35 Tar of vegetable oil and technical grease 62-89,5 Metal oxide 0.5-3, after which the mixture is thermoablative at 160-180 ° C for 60-90 minutes.

Description

ABOUT)

ate

This invention relates to the chemical purification of wood and can be used in the woodworking industry.

A known method of preparing the composition of wood impregnation, including mixing of mineral, silicone lacquer and zinc stearate {-T-175 ° C), followed by exposure for 110-140 minutes 1.

The disadvantages of this method are the length of the cooking process (boiling) and the complexity of the technology of their preparation.

The closest to the invention to the technical essence is a method of preparing a composition for impregnating wood, including mixing and thermal treatment of mineral oil and thickener 2.

The disadvantages of this method are the preparation time of the composition, the need for thorough grinding of the oil-oil suspension and the rapid crystallization of zinc stearate in mineral oil.

The purpose of the invention is to improve the anti-friction properties and increase the stability of the sizes of the impregnated wood.

The goal is achieved by the fact that according to the method of preparing the wood impregnation composition, which includes mixing and heat treatment of mineral oil and thickener, tar oil of vegetable oil and technical fat and metal oxide of the second group of the periodic system of chemical elements are used as thickening agent, and the mineral oil is premixed with vegetable oil tar oil at 100-130 ° C, then metal oxide is introduced in the following ratio, wt.%:

Mineral oil 10-35

Tar of vegetable oil and technical grease 64-89,5

Metal Oxide 0.5-3

after which the mixture is heat treated at 160-180 ° C for 60-90 minutes.

Tars are a bottoms residue of distillation of oils (black cotton, linseed, soybean, sunflower), consisting of high molecular weight limit and unsaturated fatty compounds.

In the process of displacing the starting components, at IPO-130 ° C, chemical interaction occurs between the reactive fatty oxyfatty acids and metal oxides present in the tar, with the formation of these metal salts

acids. At the same time, the melting point of the formed salts is slightly higher than the temperature of their synthesis. For this, the method provides for the second stage to further heat the entire system to 160-180 ° C with a holding time of 60-90 minutes, which ensures their complete melt and the formation of a homogeneous structure of grease lubrication (removal of moisture, air bubbles). The method of preparation of the composition. Mineral (motor) oil MS-20

pre-mixed with vegetable oil and technical fat tars at 100-130 ° C, then metal oxide (MgO, CaO, BaO) is introduced into the mixture, mixed and heat treated at 160-180 ° C for 60-90 minutes. The hardwood timber blanks are placed in the plant to modify the wood and through their end they push the prepared heated mixture with simultaneous compaction in the variable channel of the plant to 35 ° / o.

Table 1 shows the variants of the compositions.

Table 2 shows the physicomechanical parameters depending on the formulation and method of preparation.

Thus, the proposed method of preparation of the composition allows to improve the antifriction properties of the material from 0.1-0.12 to 0.08-0.09; formability characterized by volumetric decompression

compacted wood, increase 2-2.6 times; 1.5-2 times reduce the duration of preparation of the composition. This effect is achieved by chemical bonding of the available reactive fatty

and hydroxy fatty acids with metal oxides used. At the same time, the use of a small amount of them in the stock helps to keep a larger amount of the liquid phase in the lubricant, which has a positive effect on the performance of the material under self-lubricating conditions.

The expected economic effect, taking into account the increase in the service life of the roller conveyor rollers by a factor of 2, is about 125.4 thousand rubles. in year.

Table 1

№1neral oil

Vegetable oil tars and technical grease

MgO, CaO, BaO metal oxide

50

20

35

ten

45

 62

94.9 89.6 79

0.1 0.5

Continued table. 2

Claims (1)

A METHOD FOR PREPARING A COMPOSITION FOR WATER IMPREGNATION, including mixing and heat treatment of mineral oil and a thickener, characterized in that, in order to improve the antifriction properties and increase the dimensional stability of the impregnated wood, a vegetable oil and industrial fat tar and metal oxide of the second group of periodic are used as a thickener. systems of chemical elements, the mineral oil being pre-mixed with the tar of vegetable oil at 100-130 ° C, then metal oxide is introduced at the following component ratio, wt.%: Mineral oil 10–35 Tar of vegetable oil and technical fat 62–89.5 Metal oxide 0.5-3, after which the mixture is heat treated at 160-180 ° C for 60-90 minutes. £>