Way of anticipation of wood

 

(57) Abstract:

The invention relates to the protection of wood and can be used in the finishing and finishing a wood surface. Preservation treatment is carried out by treating the surface with an aqueous solution of aromatic compounds of the formula

< / BR>
where X=-NH-N+H3Cl-; X=-N=N+BF4-. The method allows to extend the range of the applied antiseptics for wood protection, protects the wood from destruction and from the action of fungi and bacteria, preserves the wood. table 2.

The invention relates to the field of wood protection and can be used in finishing, the finishing of the wood while protecting its surface.

Known methods of anticipation of wood preservatives organic origin, such as dinitrophenol dinitrophenol sodium [N. N. Melnikov, Y. A. Bashkatov "Chemistry of herbicides and plant growth regulators" (GENTZ, 1962, S. 73,723) - similar].

In connection with the environmental risks of chlorinated antiseptics, pentachlorophenol and pentahlorfenolyata, circle the applicable organic antiseptics reduced.

Currently used antiseptic is steni" (GENTZ, 1962, S. 73,723 ) - similar], also have drawbacks. So, chlorpicrin is liquid with a pungent characteristic odor, already at a concentration of 0.025 mg/l causes tearing, and at a concentration of 0.1-0.4 mg/l unbearable even for 1 minute [N. N. Melnikov, Y. A. Bashkatov "Chemistry of herbicides and plant growth regulators (HONTI. M., 1962, S. 97, 723) - similar].

The disadvantage of 2-4-dinitrophenol and 2-4-dinitrophenolate is that they are explosive when heated or kick can explode [N. N. Melnikov "Chemistry of pesticides" (COX, Chemistry, M., 1968, S. 495, 305) ].

The closest analogue of the claimed technical solution is a way of anticipation of wood, including the treatment of its surface with an aqueous solution of dinitrophenolate sodium [Former M. D., Fedorov, N. And. Protective treatment of wood, Moscow, Forestry, 1981, S. 42 ].

The proposed method antiseptic of wood allows you to obtain the technical result consists in decreasing the toxicity of wood protection and simplification of testing.

The invention consists in the following. Preservation treatment is carried out by treating the surface with an aqueous solution of aromatic nitrocompounds FD is a closer analogue of the inventive method has a simpler technology of wood processing.

Due to the fact that preservation treatment of wood is the result of chemical interaction diazocompounds and hydrazine, an antiseptic is a part of the molecules of the wood and is not washed away from her.

Inventive step of this method lies in the fact that it is not known use nitrosamine salts of aromatic Gerasimov and diazo compounds as antiseptics.

The method is as follows.

The wood surface treated with an aqueous solution of salts of aromatic nitrosamine of hydrazines and diazo compounds.

In the present invention it is proposed to use as preservative, hydrochloric acid n-nitrophenylhydrazine and tetrafluoroborate n-nitrobenzothiazole.

The type of these compounds, their empirical and structural formulas are shown in table. A.

Example 1. Reagent 1-Oh group.

The wood surface treated with an aqueous solution tetrafluorosilane 4-nitrobenzothiazole concentration 0,210-2mol/L.

The surface treatment of wood produced by wetting or aerosol method.

Example 2. The reagent 2-nd group.

The sample on the boil and spontaneously cooled.

Treated with reagents 1-St and 2-nd groups of samples of different types of wood were tested for funginertness to the effects of fungi. The samples were infected with a spore suspension of the test fungi (Aspergillus higer, Fusarium moniliforme, Penicillium chrusogenum, Paecilomyces varicoti, frichoderma viride) were stored in optimal conditions for the development of these fungi: temperature 28oC and a humidity of 98% within 28 days.

In the process of testing has identified the following indicators of gribomont:

whether the material is a food source for the development of fungi. The refinement was carried out by a suspension of fungal spores in distilled water (Method A).

the resistance of wood to the effects of metabolic products of fungi in the presence of an additional power source (Chapek's medium). Processing of data was performed spore suspension of fungi in the environment of čapek-doksa ().

- growth of mikromitsetov on the sample surface in the presence of an additional power source (environment čapek).

The results are given in table.1 and 2.

From the above test shows that the resistance to growth of fungi in the presence of an additional source of nutrition showed cedar, spruce, pine, larch, treated with a solution of tetraform is elhedrine.

From the above test also shows that resistance to metabolic products of fungi have all test samples of wood.

The proposed method allows you to:

1. To broaden the number of used antiseptics for wood protection.

2. To inhibit the development of microbial spoilage of wood.

3. To protect wood from decay and from the action of fungi and bacteria.

4. To preserve the wood.

Way of anticipation of wood, including the processing of its surface, characterized in that the treatment is carried out in an aqueous solution of aromatic nitro compounds of the formula

< / BR>
where X = -NH-N+H3Cl-;

X = -N= N+BF2-.

 

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