HRP920797A2 - Agent for preserving wood and wooden materials - Google Patents

Abstract

The agent according to the invention for preserving wood and woodbase materials is composed of 0.1 to 2.0 % by weight, preferably 0.8 to 1.5 % by weight, of 1-[[2-(2,4-dichlorophenyl-4-propyl- 1,3-dioxolan-2-yl]methyl]-1H-1,2,4-triazole, 0.2 to 2.3 % by weight, preferably 0.3 to 1.2 % by weight, of a fungicidal carbamate, namely 3-iodo-2-propynylbutyl carbamate or methylbenzimidazol-2-yl carbamate, 1.0 to 5.0 % by weight, preferably 2.0 to 3.0 % by weight, of 2,2,4-trimethyl-1,3-pentadiol monoisobutyrate and more than 89 % by weight, preferably more than 96 % by weight, of a mixture composed of a binder and/or fixative and/or at least one diluent, water and, if appropriate, at least one emulsifier and/or wetting agent.

Description

The field of technology

This invention relates to a preservative for wood and wood materials based on at least one fungicide and/or at least one insecticide, one solvent, one organic-chemical binder or fixing agent, water, and in the given case one emulsifier.

Technical problem

The technical problem solved by this invention is obtaining a means for preserving wood and wood materials, which is effective against fungi and insects that attack wood, which enables not only good penetration of active substances into the wood, but also their even distribution in the wood.

State of the art

One such preservative is known from DE-OS 3004319. Carbamates, phosphoric acid esters, thiophosphoric acid esters, thionophosphoric acid esters, chlorinated hydrocarbons and pyrethroids are listed as insecticides, tetravalent organic tin compounds, chlorinated phenols, triazoles, N-cyclohexyl-diazenium-dioxy-aluminum as well as N,N-dimethyl-N'-phenyl-N'-(fluoro-dichloromethylthio)sulfamide. However, information on the type of action of the biocidal combination was not provided.

In contrast, the task of the present invention is to provide a preservative for wood and wood materials, which, by choosing fully specified fungicides and/or insecticides, shows not only good activity against wood-staining fungi and/or wood-destroying insects, but also good stabilization of active substances in aqueous formulations. In addition, it is necessary to achieve not only good penetration of the active substances into the wood, but also an even distribution of the active substances in the wood itself.

Description of the solution

For the solution of this task, the means for preserving wood and wood materials, which was described at the beginning, according to the invention, is indicated by the fact that it contains 0.1 to 2.0 wt. %, primarily 0.8 to 1.5 wt. %, 1-//2-(2,4-dichlorophenyl-4-propyl-1,3-dioxolan-2-yl/methyl/-1H-1,2,4-triazole, (common name: Propiconazole (Propiconazol) ), 0.2 to 2.3% by weight, preferably 0.3 to 1.2% by weight, of a fungicidal carbamate, namely 3-iodo-2-propynyl-butyl-carbamate or methyl-benzimidazol-2-yl- carbamate, 1.0 to 5.0 wt.%, preferably 2.0 to 3.0 wt.%, 2,2,4-trimethyl-1,3-pentadiol-monoisobutyrate and more than 89 wt.%, preferably more than 96 wt. % of a mixture, which consists of at least one binding agent and/or fixing agent and/or at least one diluent, water as well as in the given case at least one emulsifier and/or crosslinker.

According to one preferred embodiment, the wood preservative according to the invention additionally contains 0.002 to 0.8 wt. %, primarily 0.03 to 0.2 wt. %, cyano-(4-fluoro-3-phenoxyphenyl)-methyl-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropane-carboxylate (common name: Cyfluthrin), (±)α cyano-3 -phenoxy-benzyl-((±))-cis, trans-3(2,2-dichlorovinyl)-2,2-dimethylcyclopropane-carboxylate, (S)- α cyano-3-phenoxybenzyl (1R, 3R)-3- (2,2-dibromovinyl)- 2,2-dimethylcyclopropane carboxylate or 3-phenoxybenzyl - ((±)) - cis-trans-3-(2,2 -dichlorovinyl)-2,2- dimethylcyclopropane carboxylate, (S )- α cyano-3-phenoxy-benzyl (1R, 3R)-3-(2,2-dibromovinyl)-2,2-dimethylcyclopropane-carboxylate or 3-phenoxybenzyl-((±))-cis-trans-3- (2,2-dichlorovinyl)-2,2-dimethylcyclopropane-carboxylate (common name: Permethrin (Permethrin) or their enantiomeric compounds, as an insecticide (Pyrethroid (Pyrethroid)).

According to one particularly preferred embodiment in the wood preservative according to the invention, pyrethroid, in relation to 100 wt. % of the used pyrethroid, was completely or partially replaced with an equal mass amount of an insecticide based on organo-silicon compounds, primarily with dimethyl(phenyl)silylmethyl-3-phenoxybenzyl ether or dimethyl(phenyl)silylmethyl-2-phenoxy-6-pyridimethyl ether.

Dimethyl(4-ethoxyphenyl)silylmethyl-3-phenoxy-benzyl ether of the following formula is primarily used as dimethyl(phenyl)silylmethyl-3-phenoxybenzyl ether:

[image]

with R1 = 4-OC2H5 and R2 = H

and as dimethyl(phenyl)silylmethyl-2-phenoxy-6-pyridylmethyl ether, dimethyl(4-ethoxyphenyl)silylmethyl-2-phenoxy-6-pyridylmethyl of the following formula is used::

[image]

with R1 = 4-OC2H5

European Patent Application 0040106 discloses the use of 3-iodo-2-propynylbutyl-carbamate in water-based wood preservatives. Our own experiments that were carried out, however, showed that the stability of the active substances is unsatisfactory, that both aromatic solvents and aliphatic hydrocarbons such as glycols cause a decrease in the stability of the active substances in the presence of water. Surprisingly, according to the invention, with the participation of 2,2,4-trimethyl-1,3-pentadiol-monoisobutyrate, the stability of the active substances according to the invention, i.e. the combination of active substances in polar or non-polar organic chemical solvents or solvent mixtures improves, and a better distribution of active substances is achieved substance, or combination of active substances in preserved wood.

The diluent used according to the invention consists of a non-polar or polar organo-chemical solvent or solvent mixture, primarily an oily or oily, difficult-to-evaporate organo-chemical solvent or solvent mixture. Examples of the latter solvents include aromatic or aliphatic hydrocarbons as well as their mixtures and test gasoline.

According to the invention, an alkyd resin and/or drying vegetable oil is used as a binder, preferably a synthetic resin based on methyl acrylate/n-butyl acrylate copolymer, styrene/acrylic acid ester copolymer and/or polyvinyl versatate.

The use in water of finely dispersed synthetic resins based on methyl acrylate/n-butyl acrylate copolymer, styrene/acrylic acid ester copolymer or polyvilversatate with an average particle size of the copolymer or polymer below 0.07 μm leads to the prevention of re-penetration of biocidal active substances from wood to the wood surface.

Alkylarylsulfonates, alkylarylsulfonic acid derivatives and/or polyoxyethylene derivatives and/or polyalkylene- or polyalkyl-glycol esters are used as emulsifiers, primarily surface-active organic chemical compounds containing one or more polyoxyethylene groups and/or one or more fatty acid groups.

Examples according to the invention

Example 1:

19.0 % Alkyd resins (solid)

0.5% Solvents (mixture of aromatic hydrocarbons)

3.1% Emulsifier (ethoxylated nonylphenol)

2.0% 2,2,4-Trimethyl-1,3-pentadiol monoisobutyrate

0.8% of 3-Iodo-2-propynyl-butylcarbamate

0.8% Propiconazole

0.05% Permethrin 48 : 52

73.75% Water

______

100%

Example 2

19.0 % Alkyd resins (solid)

0.5% Solvents (mixture of aromatic hydrocarbons)

3.1% Emulsifier (ethoxylated nonylphenol)

2.0% 2,2,4-Trimethyl-1,3-pentadiol monoisobutyrate

0.8% Propiconazole

0.5% Methyl-benzimidazol-2-yl-carbamate

0.05% Permethrin 48 : 52

74.05% Water

______

100%

Example 3

8.0% of styrene/acrylic acid ester copolymer (solid)

1.6% Solvents (mixture of aromatic and aliphatic hydrocarbons)

3.0% 2,2,4-Trimethyl-1,3-pentadiol monoisobutyrate

1.5% Propiconazole

0.8% of 3-Iodo-2-propynyl-butylcarbamate

0.05% Permethrin 48 : 52

85.05% Water

______

100%

Example 4

4.0 % Methacrylate/n-butacrylate copolymer (solid) + Polyvinylversatate solid

1.6% Solvents (mixture of aliphatic hydrocarbons)

3.0% 2,2,4-Trimethyl-1,3-pentadiol monoisobutyrate

1.0% Propiconazole

0.5% Methyl-benzimidazol-2-yl-carbamate

0.05% Permethrin 48 : 52

89.85% Water

______

100%

Example 5:

19.0 % Alkyd resins (solid)

0.5% Solvents (mixture of aromatic hydrocarbons)

3.1% Emulsifier (ethoxylated nonylphenol)

2.0% 2,2,4-Trimethyl-1,3-pentadiol monoisobutyrate

0.8% of 3-Iodo-2-propynyl-butylcarbamate

0.8% Propiconazole

73.8% Water

_____

100%

Example 6:

19.0 % Alkyd resins (solid)

0.5% Solvents (mixture of aromatic hydrocarbons)

3.1% Emulsifier (ethoxylated nonylphenol)

2.0% 2,2,4-Trimethyl-1,3-pentadiol monoisobutyrate

0.8% Propiconazole

0.5% Methyl-benzimidazol-2-yl-carbamate

74.1% Water

_____

100%

Example 7:

8.0% styrene/acrylic acid ester copolymer (solid)

1.6% Solvents (mixture of aromatic and aliphatic hydrocarbons)

3.0% 2,2,4-Trimethyl-1,3-pentadiol monoisobutyrate

1.5% Propiconazole

0.8% of 3-Iodo-2-propynyl-butylcarbamate

85.1% Water

_____

100%

Example 8:

4.0 % Methacrylate/n-butyl acrylate copolymer (solid)

Polyvinylversatata (rigid)

1.6% Solvents (mixture of aliphatic hydrocarbons)

3.0% 2,2,4-Trimethyl-1,3-pentadiol monoisobutyrate

1.0% Propiconazole

0.5% Methyl-benzimidazol-2-yl-carbamate

89.9% Water

_____

100%

Determination of the effect of the wood preservative according to the invention against flooding

Test method: Short-term testing of a means to protect wood from fungi that cause flooding.

Spore suspension: Obtaining a spore suspension according to EN 152, Part 1, Appendix B.

Examination of the fungus: Aureobasidium pullulans

Sclerophoma pityophyla.

Test vessel: Kolle bottle.

Tested wood: Spliced pine, 3 - 8 annual rings/cm, smooth planed; dimensions: 9.3 x 1.0 cm.

The boards have a 3 mm deep and wide saw cut in the middle, transverse to the direction of the fibers.

Test procedure: Each time one half of the swab is coated with the tested amount of the agent being tested. After this, the wood was kept for three weeks in the laboratory for drying.

To test for fungi, the plates are placed individually in Kolle bottles on a round filter, the bottles are closed with cotton wool and sterilized. After this, the spore suspension is applied to the filter under as sterile conditions as possible.

Test criterion: After eight weeks of the test, the "tested" and "control" halves are separated, the extent of flooding of the surface and the depth of the non-flooding zone are determined, marking

0 = no flooding

1 = max. 10% of the area flooded

2 = max. 50% of the surface flooded

3 = the surface is almost completely flooded, i.e. a recognizable small fouling

4 = surface completely flooded

The surfaces should be free of blueness and the depth of action should be a minimum of 1 mm, with an average value of 1.5 mm.

The following compositions were formed after two weeks of exposure to light in the xenotest device:

Examples according to the invention:

Flooding of the surface Depth of action in mm

Example 1 0 1.5 - 3.0

Example 2 0 1.5 - 2.5

Example 3 0 2.0 - 3.0

Example 4 0 1.5 - 3.0

Example 5 0 1.5 - 3.0

Example 6 0 2.0 - 3.0

Example 7 0 1.5 - 3.0

Example 8 0 1.5 -2.5

Determination of the effect of the wood preservative according to the invention against wood-destroying insects

The number of the European test standard DIN EN 46 "determination of preventive action against eggs of Hylotrupes bajulus (Linnaeus) larvae (laboratory procedure)"

Composition of the wood preservative according to the invention: 0.05% Permethrin 48:52

1.50% Propiconazole

19.00 % Alkyd resins (solid)

0.80% of 3-Iodo-2-propynyl-butylcarbamate

2.0% 2,2,4-Trimethyl-1,3-pentadiol-isobutyrate

3.0% Emulsifier

73.65% Water

Type of wood used: Pine (pinus sylvestris L.)

Tested concentration

wood preservatives: 100%

Type and number of stages: Pipetting, 2 x

Solvent capacity or

means of protection: See Table p. 9

Dryness test: According to DIN EN 46

Test results: See Table p. 9

CAPACITY OF RECOVERED LARVA

[image]

Claims (7)

1. Preservative for wood and wood materials based on at least one fungicide and/or at least one insecticide, one solvent, one organic-chemical binding agent or fixing agent, water, as well as in the given case one emulsifier, indicated by the fact that the agent contains 0.1 to 2.0 wt. %, primarily 0.8 to 1.5 wt. % 1-//2-(2,4-dichlorophenyl-4-propyl-1,3-diocholan-2-yl/methyl/-1H-1,2,4-triazole, 0.2 to 2.3 wt. %, primarily 0.3 to 1.2 wt. % of a fungicidal carbamate, namely 3-Iodo-2-propynyl-butylcarbamate or methyl-benzimidazol-2-yl-carbamate 1.0 to 5.0 wt. %, primarily 2.0 to 3.0 wt. % 2,2,4-Trimethyl-1,3-pentadiol-monoisobutyrate, i more than 89, primarily more than 96 wt. % one mixture, which consists of at least one binding agent and/or fixing agent and/or at least one diluent, water and, in a given case, at least one emulsifier and/or crosslinker. 2. Means according to claim 1, indicated by the fact that it additionally contains 0.002 to 0.8 wt. %, primarily 0.03 to 0.2 wt. % cyano-(4-fluoro-3-phenoxyphenyl)-methyl-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropane-carboxylate, (±)α-cyano-3-phenoxy-benzyl-(±)-cis , trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane-carboxylate, (S)- α -cyano-3-phenoxybenzyl (1R,3R)-3-(2,2-dibromovinyl)-2, 2-dimethylcyclopropane-carboxylate or 3-phenoxy-benzyl-(±)-cis-trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane-carboxylate or their enantiomeric compounds as an insecticide (Pyrethroid). 3. Means according to claims 1 and 2, characterized in that the pyrethroid (in relation to 100 wt. % of the used pyrethroid) is replaced completely or partially with an equal mass amount of an insecticide based on organo-silicon compounds, primarily with dimethyl(phenyl)silyl -methyl-3-phenoxybenzyl ether or dimethyl(phenyl)silylmethyl-2-phenoxy-6-pyridylmethyl ether. 4. Agent according to claim 3, characterized in that dimethyl(4-ethoxyphenyl) silymethyl-3-phenoxy-benzyl ether is used as dimethyl(phenyl)silymethyl-3-phenoxybenzyl ether, and dimethyl(phenyl)silymethyl-2-phenoxy -6-pyridylmethyl ether uses dimethyl(4-ethoxyphenyl)-silyl-methyl-2-phenoxy-6-pyridylmethyl ether. 5. Agent according to one or more claims 1 to 4, characterized by the fact that it contains or consists of one non-polar or polar organic-chemical solvent or solvent mixture, primarily at least one oily or oil-hardly volatile organic-chemical solvent or solvent mixture. 6. Agent according to one or more claims 1 to 5, characterized in that it contains at least one alkyd resin and/or one drying vegetable oil as a binding agent. 7. Agent according to one or more claims 1 to 5, characterized in that as a binder it contains at least one synthetic resin based on one methyl acrylate/n-butyl acrylate copolymer, one styrene/acrylic acid ester copolymer and/or one polyvinyl versatate.