CS239470B1 - Impregnating wood preservative with high depth efficiency - Google Patents

Abstract

The impregnation agent solves the problem of deep protection of wood against attack by fungi and biological pests and against the effects of moisture and its essence lies in the fact that it contains 5 to 40% by weight of a synthetic binder based on reaction products of specified alcohols with monocarboxylic acids or their esters, 0.5 to 5% by weight of biologically active substances; 40 to 88% by weight of organic solvents from the group of hydrocarbons with a boiling point of 130 to 280 C, alcohols, ethers and esters and possibly up to 30% by weight of substances from the group of dyes, pigments, surfactants and salts derived from monocarboxylic acids and Mn, Pe, Co, Pb, Ca, Zn, Ba and Cu. The impregnation agent can be applied by spraying or dipping under normal reduced and increased pressure and temperature.

Description

The invention relates to a composition of an impregnating agent for protecting wood against deterioration with high depth efficiency.

Traditionally, by-products of the coke and petrochemical industries have been used for wood protection, and more recently, solutions of chlorinated phenols in organic solvents. However, such protection is not long-term, because not only organic solvents but also other active substances gradually evaporate. Moreover, none of these agents reduces the swelling of wood with water, which also significantly contributes to its destruction. In addition, some effective chlorinated phenol derivatives have ceased to be used due to their ecological unsuitability. Improvements have been achieved by using wood protection agents that, in addition to the described biologically active components, also contain water-repellent substances, as stated, for example, in Os. AO No. 192 864. However, a more detailed examination revealed that even these agents do not protect the wood to a sufficient depth, because their penetration efficiency is insufficient.

The deep protection of wood has been significantly improved by using the composition according to the present invention. Its subject is an impregnating composition for protecting wood against deterioration with high depth efficiency based on a synthetic binder, fungicidal and other biologically active substances, organic solvents and optionally other components. The essence of the invention lies in the fact that the composition contains 5 to 40% by weight of a synthetic binder based on reaction products of 2 to 6 strong aliphatic alcohols with a molecular weight of 62 to 300 with monocarboxylic acids with 7 to 22 carbon atoms and/or their esters, 0.5 to 5% by weight of fungicidal and other biologically active substances, in particular 2,5-dlmethyl-N-cyclohexyl-N-methoxy-3-furan-3-carboxylic acid amide, bis-tributyltin oxide and pentachlorophenol. Further, 40 to 88% by weight of organic solvents from the group of hydrocarbons with a boiling point from 130 to 280 °C, aliphatic and cycloaliphatic alcohols, ethers and esters and ketones. Possibly also up to 30% by weight of components from the group of organic dyes, organic and inorganic pigments, surfactants and salts derived from monocarboxylic acids and Mn, Fe, Co, Pb,

Ca, Zn, Ba and Cu.

The impregnation agent for wood protection with high depth efficiency brings a number of advantages compared to known agents. First of all, it prevents wood from being attacked by fungi and biological pests for a much longer period of time and to a greater depth of the wood. It easily wets the surface of the wood, not only fresh, but also older and contaminated. After the solvents evaporate, it creates effective protection against moisture in the entire bonded layer, thereby reducing the swelling of the wood and volume changes that contribute to its deterioration.

For the production of a wood preservative with high depth effectiveness, the following components can be used in particular: As a synthetic binder based on reaction products of 2 to 6-hydric aliphatic alcohols, products prepared from ethylene glycol and propylene glycol or its oligomers up to an average molecular weight of 300, glycerol, trimethylolpropane, monopentaerythritol, dipentaerythritol, xylitol and mannitol with monocarboxylic acids, such as benzoic acid, p-tert.butylbenzoic acid, p-toluyl, their ethyl esters and derivatives chlorinated in the core, salicylic acid, aliphatic acids obtained by splitting vegetable oils, or these oils can also be used for the preparation, especially linseed, soybean, dehydrated castor, wood, tung, rapeseed (especially with a proportion of erucic acid glycerides below 10% by weight). Chemically modified aliphatic acids can also be used, e.g. cyclopentadienated, styrenated, acrylated or epoxidized. As fungicidal and otherwise biologically active substances, pentachlorophenol, bis-tributyltin oxide or 2,5-dimethyl-N-cyclohexyl-H-methoxy-3-furan-3-carboxylic acid amide can be used.

As organic solvents, it is possible to use white spirit, xylene, solvent naphtha, higher gasoline fractions up to a boiling point of 280 °C, aromatic fractions containing, in addition to xylenes, di- and tri-ethylbenzene, etc. Among the alkyl solvents, it is possible to use, in particular, propanol, isopropanol, butanol, isobutanol, hexanol, isooctanol, cyclohexanol, methylhexanol, ethyl or butyl acetate, ethylene glycol monoethyl ether. Of the other components, these are most often organic dyes that are well soluble in the mentioned organic solvents, e.g. anthraquinone, phthalocyanine and azo dyes. ,

Furthermore, organic and inorganic pigments are used, among which we can mention, for example, salts of manganese, calcium and acidic monoazobenzenes, acrylates of 2-hydroxy-3-naphthoic acid, and among inorganic pigments, in particular iron oxides and titanium whites.

The addition of naphthenate, resinate or octoate of manganese, iron, cobalt, calcium, zinc, copper, etc. is suitable. In addition to siccative effects, some of them also have fungicidal and biologically active effects (especially Zn and Cu salts).

Surfactants that contribute to better wetting, especially of older wooden surfaces, include, for example, condensation products of coconut oil acid with diethanolamine, alkylbenzenesulfonic acid, alkyl ether sulfonate, ethoxylated fatty alcohols, condensation products of fatty acids, especially stearic acid with ethylene oxide, and others.

The impregnation agent according to the invention is produced, for example, by adding fungicidal and biologically active substances, an acidic solvent and optionally also a siccative, a surfactant and an organic dye to a 50 to 60% solution of a synthetic binder in a hydrocarbon solvent with stirring. If pigments are also added, it is preferable to add them in the form of pigment pastes. It is possible to work at normal temperature or preferably at a temperature of 40 to 80 ° C. After thorough homogenization, the product can be filled into packages.

The impregnating agent for wood protection with high depth efficiency can be applied by brush, dipping under normal, reduced and increased pressure and temperature. The composition is illustrated by the examples given below, which, however, do not limit the scope of the invention in any way.

For the examples of impregnation agents presented below, the following synthetic binders were used:

Synthetic binder A is prepared by reacting 93 parts by weight of glycerol, 45 parts by weight of sorbitol, 300 parts by weight of rapeseed oil containing 5% by weight of erucic acid glycerides, 244 parts by weight of benzoic acid and 80 parts by weight of p-toluic acid.

Synthetic binder B was prepared by reacting 200 parts by weight of pentaerythritol, 30 parts by weight of polyethylene glycol with an average molecular weight of 300, 550 parts by weight of benzoic acid and 300 parts by weight of carboxylic acids obtained from linseed oil.

Synthetic binder 0 is prepared by reacting 100 parts by weight of glycerol, 122 parts by weight of benzoic acid, 80 parts by weight of p-tert-butylbenzoic acid and 330 parts by weight of linseed oil.

Synthetic binder D is prepared by reacting 190 parts by weight of benzoic acid, 120 parts by weight of salicylic acid,

420 parts by weight of tall oil acid with 65 parts by weight of ethylene glycol and 150 parts by weight of trimethylolpropane.

Synthetic binder E is prepared by reacting 700 parts by weight of linseed oil monocarboxylic acids, 150 parts by weight of benzoic acid methyl ester and 150 parts by weight of pentaerythritol.

Example 1

Impregnation agent for wood protection with high depth effectiveness

Synthetic binder B Bis-tributyltin oxide parts by weight 3 parts by weight parts by weight

Cobalt naphthenate 0.1 part weight Lead naphthenate 0.5 part weight Ethoxylated unsaturated alcohols Ο^θ A mixture of aromatic hydrocarbons boiling in the range 0.2 H 180 to 280°C 19.2 M tr

First, a 50% solution of synthetic binder B in white spirit is prepared and solutions of cobalt and lead naphthenates in white spirit (containing 1% by weight of Co-naphthenate and 50% by weight of Pb-naphthenate), Slovasol 901 are gradually added to it while stirring, and then the rest of the white spirit and a mixture of aromatic hydrocarbons are added.

This impregnation agent is used to protect joinery products, e.g. window frames, doors, etc., which are impregnated using a vacuum-pressure process.

Example 2 to 6

The composition is given in parts by weight.

Example

2 3 4 5 6 Synthetic binder A 5.0 5.0 II 11 G 30.0 20.0 II II D 40.0 - n it E 25.0 - Pentachlorophenol 0.5 2.3 - Bis-trimethyltin oxide 3.5 0.5 . -

2,5-Dimethyl-acid amide

-N-cyclohexyl-N-metho- xyfuran-3-carboxylic 3.3 1.5 0.5 3.8 0.5 White spirit Gasoline with dest. dis- 25.0 17.0 5.7 26.5 limit 160 to 240 °G 5.0 20.0 5.0 23.0 20.0 Solvent naphtha 54.0 15.5 16.3 23.0 Butanol - 2.0 1.0 1.0 Xylene those. - 32.0 Cyclohexanol 2.0 2.0 2.0 Methylcyclohexanone 7.0 2.0 Ethyl glycol Dye - Anthracite yellow- 2.0 3.0 4.0 quinone Dye - red on 1.0 based on azo compounds Dye - anthracite green - 2.0 quinones Iron oxide red 10.0 1.7 0.5 Phthalocyanine blue Chrome green 3.3 1.5' 2.0 Oxyethylated fatty alcohol 0.5 0.3 Oxyethylene fatty acid C ₎₈ 2.0 Oxyethylene stearic acid 0.5 0.3

Lead naphthenate 4.0 5.0 2.0 Cobalt naphthenate 1 .0 1.2 0.7 Manganese resinate 2.0 OBJECT INVENTION

0.2

Claims (1)

5.0 Wood preservative with high depth efficiency based on synthetic binder, fungicide and other biologically active substances, organic solvents, possibly also other components, characterized in that it consists of 5 to 40% by weight. % synthetic binder based on the reaction products of 2 to 6 powerful aliphatic alcohols having a molecular weight of 62 to 300 with monocarboxylic acids of 7 to 22 carbon atoms and / or esters thereof, 0.5 to 5 wt. % of fungicides and other biolegically active substances, in particular 2,5-dimethyl-N-cyclohexyl-N-methoxy-2,5-dibutylfuran-3-carboxylic acid amide, bis-tributyltin oxide and pentachlorophenol, 40 to 88% by weight % organic solvents of the hydrocarbon group boiling point 130 DEG-280 DEG C., aliphatic and cycloaliphatic alcohols, ethers, esters and ketones and optionally up to 30 wt. substances from the group of organic dyes, organic and inorganic pigments, surfactants and salts derived from monocarboxylic acids and manganese, iron, cobalt, lead, calcium, zinc, barium and copper.