DD247175A1 - WOOD PRESERVATIVES - Google Patents

Abstract

Wood preservatives based on water-soluble active ingredients for the protection of wood and wood-based materials against infestation and destruction by microorganisms and insects. It is a wood preservative to be developed with improved Wirkungsintensitaet and with improved Auswaschbestaendigkeit. The wood preservative with fungicidal and insecticidal properties based on water-soluble ammonium compounds contains as active substance 85 to 99.9 wt .-% of the compound R4-N-R1 X, 0.1 to 15 wt .-% of a compound of general formula R4-N- R5-N-R4 XY2 optionally 0.1 to 10 wt .-% of the reaction product of a mono- to polychlorinated hydrocarbon having up to 20 carbon atoms with a dialkylamine and in solution or emulsion with water optionally a corrosion inhibiting agent and optionally a defoamer.

Description

R, a hydrocarbon radical having up to 20 carbon atoms, R ₂ and R _{3 are} any alkyl and / or alkyl radicals having up to 8 carbon atoms, R _{4 is} an alkyl radical having up to 5 carbon atoms or a hydrogen radical,

X ~ are the anion of an inorganic or organic acid, according to the invention, the wood preservative dissolved as an active substance 85 to 99.9Gew .-% of the compound

E "- U - H,

0.1 to 15 wt .-% of the compound of the general formula

d.

R _{5 is} any, also branched hydrocarbon radical having up to 20 carbon atoms, which is optionally also chloro-substituted and optionally ring-like instead of R _{4 is} linked to one of the two nitrogen atoms, X, Y are the radicals of mono- or polybasic organic or inorganic acids and the same or different, optionally 0.1 to 10 wt .-% of the reaction product of a mono to polychlorinated hydrocarbon up to 20 carbon atoms with a dialkylamine and in solution or emulsion with water, optionally 0.01 to 2Gew .-% of a corrosion inhibiting agent and optionally 0.02 to 1.8% by weight of a defoaming agent. Advantageously, the radical R _{5 is} a hydrocarbon radical having 7 to 20 carbon atoms.

In an advantageous embodiment, the wood preservative contains as active substance 0.1 to 10 wt .-% of the reaction product of a di- to polychlorinated hydrocarbon having up to 20 carbon atoms, with dimethylamine. With particular advantage, the wood preservative contains 95.1% by weight of the compound

CH, -N- CH-,

3 j 3

X " and 3.5 G-ew .-%

connection

CH,

N -H

CH

CH-

2+

with X "= CH 3 COO and R ₅ = C ₇ - bisC ₂ o hydrocarbon radical and 0.5 wt% of the compound

CH,

wherein the active ingredient is in 50% by weight solution with water and the solution contains 0.85% by weight of disodium hydrogenphosphate as a corrosion inhibitor. The wood preservative according to the invention has improved wood protection effect and higher washout resistance from the wood body. By combining the components, synergistic effects are achieved. The diamine component binds the active ingredients to the wood body, i. on Zellulosegerüst, improves and thus increases the washout resistance. The wood preservative contains no chlorinated compounds and is therefore less toxic than known agents.

embodiments

example

To prepare a wood preservative are mixed together in a stirred vessel: 42.5 kg of dimethyl dodecylammonium acetate,

prepared by reacting dodecyl mitDimethylamin at 360 ⁰ C in an alumina catalyst and reaction of the resulting tertiary amine with acetic acid, 7.5 kg 1,11-Tetramethylundecyldiammoniumdiacetat,

prepared by reacting undecane 1,11-dibromide with dimethylamine, liberating the di-tertiary diamine with caustic soda and then reacting the diamine with acetic acid, 0.85 kg disodium hydrogen phosphate (anti-corrosive), 50 kg water, ₍

0.2 kg of n-butanol (defoaming agent).

The wood preservative is applied to the wood to be protected or the wood material surface.

Preventive protection against the infestation of blue mushrooms, wood-destroying fungi and insects is achieved by applying 20g of active substance per square meter of wood.

To determine the effectiveness of the wood preservative according to the invention in comparison to the wood preservative specified in the prior art, dilution series were prepared by the stock solutions containing 50% by weight of active compound and the activity against blue fungi (Pullularia pullulans) was tested therewith. For this purpose, in each case 100 g of solution per square meter of wood were applied to test specimens made of pine wood and exposed to the attack of a pure culture of wood-discoloring blue-fungal fungi. The limit concentration of active substance in the solution was determined at which there is still a visible inhibition of the formation of blueness on the wood surface or on the exposed inner wood parts. The test specimens impregnated with the wood preservative of the invention were found to have an efficacy limit concentration which is lower by a factor of 2.5 than those impregnated with a prior art wood preservative.

In order to determine the washing-out resistance of the substances, test specimens which had been soaked in the dilution series were exposed to 35 hours of water storage prior to the action of the blue fungi. For specimens without water storage, the efficacy limit concentration is lower than both specimens previously subjected to water storage. The ratio of the limit concentrations of both test series is a measure of the different washout resistance of the wood preservatives. The smaller this ratio is and the closer it approaches the value 1, the better is the washout resistance of the wood preservative. For the wood preservative according to the invention, a ratio of 2.8 was determined, while for a prepared according to the prior art means this value is 3.5.

Example 2

In a stirred vessel are mixed together: 47.0 kg Dimethyldecylammoniumformiat,

prepared by reacting decyl chloride and dimethylamine, releasing the amine by caustic soda, and then reacting the tertiary amine with formic acid, 3.0 kg of 1,10 tetramethyldecyldiammonium oxalate,

prepared by reacting decyl dichloride and dimethylamine, releasing the diamine by caustic soda, and then reacting the diamine with oxalic acid, 1.0 kg dimethyldecylamine, 0.5 kg disodium hydrogen phosphate, 50.0 kg water.

The wood preservative is applied to the wood to be protected in an amount of 22g of active substance per square meter of wood.

The limiting concentration of blue staining effectiveness is lower by a factor of 3.1 than in the prior art wood preservative. The rinse resistance ratio is 3.0.

Example 3

To prepare a wood preservative, mix together in a stirred vessel:

100kg of an ammonium acetate / amine mixture,

prepared from a chlorinated hydrocarbon fraction of chain length Ci ₀ to C ₁₈ (average chain length C ₁₄ , ₅ ), which in addition to 47 wt .-% paraffin 44.6 wt .-% monochloro wax, 7.2 wt .-% dichloroparaffin and 1.2 Wt .-% higher chlorinated paraffins contains, by reacting with dimethylamine under pressure at 453 K, releasing the tertiary amines with sodium hydroxide solution, then reacting the amine mixture with such an amount of acetic acid that 98 wt .-% of the amine mixture are converted into the acetate and 2% by weight remain as such in the mixture, addition of sufficient water to reduce the active substance concentration to 50% by weight and separation from the paraffin content by phase separation and 1 kg of sodium dihydrogen phosphate.

The wood preservative is applied in an amount of 20 g of active substance per square meter of wood and thus provides complete protection against infestation by blue fungus, wood-destroying fungi and insects.

The limiting concentration of this agent is 3.5 times lower than that produced by the prior art. The quotient of washout resistance is 3.2.

Example 4

In a stirred tank are mixed together:

94 kg of a 50 wt .-% aqueous solution of a mixture of ammonium acetate with 3 wt .-% free tertiary amine after

Example 3 1.3 kg of a 50% by weight aqueous solution of a compound of the type

CH-

e,

CH, -H-R. - CH - N 3 I 1>

ti

CH,

2+

AcO Cl

or.

CH,

CH-

CH-

2+

AcO "Cl"

prepared by reacting a higher chlorinated paraffin mixture of the chain length Ci ₀ to C ₁₃ with an amount of dimethylamine deficient in the amount of chlorine, wherein after liberation of the amines from their salts compounds of the structure

- H - E, ¹

to be obtained

Cl

which after addition of three times the amount of paraffin separated according to Example 3 and 1 hour heating of this mixture to 403 K to compounds of the structure

f ^H 3 OH ₃ -H-

-CH-

or.

N- CH -

CH-

CH-

+. cl "

realize,

which are then converted into the desired compounds with acetic acid, wherein at the same time the paraffin required for the cyclization is separated again after addition of an equal amount of water by phase separation.

1.0kg potassium dihydrogen phosphate.

The wood preservative is applied in an amount of 18 g of active substance per square meter of wood. The limiting concentration of blue staining effectiveness is lower by a factor of 4.2 than in the prior art wood preservative. The ratio of washout resistance is 2.3.

Example 5

For the preparation of a wood preservative are mixed together in a stirred vessel:

25kg of wood preservative according to Example 2 and

75 kg of the wood preservative according to Example 4.

The wood preservative acts, in a quantity of 20 g / m ² on wood and / or: wood material applied, preventively against infestation of blue mushrooms, wood-destroying mushrooms and insects. The rinse resistance ratio is 3.0.

The limiting concentration of the anti-blueing efficiency is 3.5 times lower than in a conventional wood preservative according to the prior art.

Claims (4)

Invention claim: 1. Wood preservatives with fungicidal and insecticidal properties based on water-soluble ammonium compounds of the general formula H "- N - R _{1 is} a hydrocarbon radical having up to 20 carbon atoms, R ₂ and R _{3 are} any alkyl and / or aryl radicals having up to 8 carbon atoms R _{4 is} an alkyl radical having up to 5 carbon atoms or a hydrogen radical, X ~ is the anion of one inorganic or organic acid, characterized in that the wood preservative as the active substance 85 to 99.9Gew .-% of the compound R 0.1 to 15% by weight of the compound of the general formula E - E - R - N - RI ^ I ET *) -7 -CW R _{5 is} any, also branched hydrocarbon radical having up to 20 carbon atoms, which may also be chlorine-substituted and optionally ring-like instead of R _{4 is} linked to one of the two nitrogen atoms, X, Y are the radicals mono- or polybasic organic or inorganic acids and are the same or different, optionally 0.1 to 10Gew .-% of the reaction product of a mono- to polychlorinated hydrocarbon having up to 20 carbon atoms with a Diaikylamin and in solution or emulsion with water, optionally 0.01 to 2Gew .-% of a corrosion inhibitor and optionally 0.02 to 1.8Gew .-% of a defoaming agent. 2. Wood preservative according to item 1, characterized in that the radical R _{5 is} a hydrocarbon radical having 7 to carbon atoms. 3. Wood preservative according to item 1, characterized in that it contains 0.1 to 10 wt .-% of the reaction product of a di- to polychlorinated hydrocarbon having up to 20 carbon atoms, with dimethylamine. 4. wood preservative according to item 1, characterized in that it is 95.1 wt .-% of the compound CEL - Ή - CIL t X " and 3.5% by weight of the compound CEL CHj - H - H ί CH, 2X " with X "= CH ₃ -COO" and R ₅ = C ₇ -C ₂₀ -hydrocarbon radical with 0.5% by weight of the compound OH, / 3 CH-, and the active ingredient is present in 50% by weight solution with water and the solution contains 0.85% by weight of disodium hydrogen phosphate as corrosion inhibitor. Field of application of the invention The invention relates to wood preservatives based on water-soluble active substances for the protection of wood and wood-based materials against infestation and destruction by microorganisms and insects. Characteristic of the known technical solutions A process is known for the permanent preservation of wood by impregnation with a fungicidal and insecticidal wood preservative on an amine basis, whereby as impregnating agent aqueous solutions of compounds of the general formula -C-O Jl 0 H-M-CH, GEL wherein R _{1 is} a hydrogen atom or an alkyl radical having 1 or 2 C atoms or a radical of the general formula < ^0Ε Λ - S - H-IT CH- CH-; with η = O to 4, R _{2 is} an alkyl radical having an average chain length of 15 C atoms, are used, which optionally contain a corrosion inhibiting agent (DE-AS 1 299 405). A disadvantage of this method, in addition to a relatively low washout resistance, the low efficiency of the compounds in the wood body. When applying this method for wood preservation therefore high drug concentrations are required. As a result, as a further disadvantage results in a greater health risk for the user. Object of the invention The aim of the invention is a wood preservative based on water-soluble ammonium compounds with improved wood protection effect and higher washout on the wood body. Explanation of the essence of the invention The problem to be solved is to improve the effectiveness of the wood preservative and the binding of the active ingredient to the wood body. This object is achieved by a wood preservative with fungicidal and insecticidal properties based on water-soluble ammonium compounds of the general formula R. - N -