JP2022064646A - Composition for preservation of wood - Google Patents

Abstract

To provide a composition for preservation of wood that contains penflufen and has aseptic properties against Fomitopsis palustris and also has anti-termite properties.SOLUTION: A composition for preservation of wood contains penflufen, and a neonicotinoid anti-termite agent. Preferably, the content of the penflufen is 0.025 wt.% or more. More preferably, the composition for preservation of wood further contains an iodine antifungal agent. Still more preferably, the composition for preservation of wood is free of N-methyl pyrrolidone.SELECTED DRAWING: None

Description

The present invention relates to a wood preservation composition.

Wood preservatives are used to prevent deterioration of wood due to rotting fungi and feeding damage by termites. In Japan, wood preservatives that satisfy both the antiseptic performance against wood-rotting fungi, C. versicolor and C. versicolor, and the anti-termite performance against Formosan subterranean termite are used as wood preservatives by the Japan Shiroari Countermeasures Association and Japan Wood Preservation. Certified by the association.

Wood preservatives are produced by combining preservative components such as organic iodine-based compounds and azole-based compounds with anti-termite components such as pyrethroid-based termiticide and neonicotinoid-based termiticide. Patent Document 1 discloses penflufen as an antiseptic component, but its antiseptic performance against Ozuratake has not been investigated.

Japanese Unexamined Patent Publication No. 2013-544800

The antiseptic properties of penflufen against Ozuratake are unknown. It is an object of the present invention to provide a wood preservation composition containing penflufen and having antiseptic activity against Ozuratake and anti-termite activity.

As a result of studying various antiseptic and antiseptic components, the present inventors have found that a wood preservation composition containing penflufen and a neonicotinoid antiseptic has antiseptic and antiseptic properties against Ozuratake. Find out and complete the invention.

That is, the present invention relates to a wood preservation composition containing penflufen and a neonicotinoid termiticide.

The concentration of penflufen is preferably 0.025% by weight or more.

The wood preservation composition preferably further contains an iodine-based antifungal agent.

The wood preservation composition preferably does not contain N-methylpyrrolidone.

The wood preservation composition preferably further contains water, benzyl alcohol, and N-dimethyl fatty acid amide.

The wood preservation composition preferably further contains a surfactant.

The neonicotinoid termiticide is preferably imidacloprid.

The iodine-based antifungal agent is preferably iodopropynylbutylcarbamate.

The wood preservation composition is preferably a wood preservation composition for suppressing the growth of C. versicolor and C. versicolor.

The present invention also relates to wood treated with the wood preservation composition.

The wood-preserving composition of the present invention has antiseptic and anti-termite properties against Ozuratake, and can achieve a sufficient wood-preserving effect while suppressing the amount of expensive penflufen used.

The wood preservation composition of the present invention is characterized by containing penflufen and a neonicotinoid-based termiticide.

で表される。ペンフルフェンは、木材腐朽菌のミトコンドリア電子伝達系に作用してエネルギー代謝を妨げ、木材腐朽菌の菌糸伸長、胞子発芽、発芽管伸長、胞子形成などを阻害する。 <Penfurfen>
Penflufen (N- (2- [1,3-dimethylbutylphenyl] -5-fluoro-1,3-dimethyl-1H-pyrazole-4-carboxamide) is represented by the following formula (I).

It is represented by. Penflufen acts on the mitochondrial electron transport chain of wood-rotting fungi to interfere with energy metabolism, and inhibits hyphal elongation, sporulation germination, germination tube elongation, and sporulation of wood-rotting fungi.

The concentration of penflufen in the wood preservation composition is preferably 0.025 to 0.15% by weight, more preferably 0.05 to 0.15% by weight, still more preferably 0.1 to 0.15% by weight. If it is less than 0.025% by weight, the standard of antiseptic performance is not satisfied, and if it exceeds 0.15% by weight, crystals tend to easily precipitate during storage of the preservation solution, which is not economical. The concentration of each component described in the present specification is the final concentration at the time of use, and the concentration of the preservation solution may be 10 to 30 times this concentration. At the time of use, the preservation solution can be diluted with a solvent such as water or alcohol before use.

<Neonicotinoid termiticide>
Neonicotinoid termiticide is a nicotinic acetylcholine receptor agonist. The neonicotinoid-based anti-termite agent used in the present invention is not particularly limited as long as it has anti-termite properties, and examples thereof include imidacloprid, acetamiprid, clothianidin, dinotefuran, nitenpyram, thiamethoxam, and thiamethoxam. Among these, imidacloprid and clothianidin, which have low solubility in water, are preferable, and imidacloprid is more preferable.

The concentration of the neonicotinoid termiticide in the wood preservation composition is preferably 0.025 to 0.2% by weight, more preferably 0.05 to 0.2% by weight, and 0.1 to 0.2% by weight. % By weight is more preferred. If it is less than 0.025% by weight, the anti-termite property tends to be inferior, and if it exceeds 0.2% by weight, crystals tend to easily precipitate during storage of the preservation solution, which is not economical.

<Anti-preservative and anti-ant performance>
The wood preservation composition of the present invention has an antiseptic property against wood-rotting fungi and an antiseptic property against termites.

Wood-decay fungi include C. versicolor, Oyster Mushroom, Nikuiroanatakemodoki, Mawatagsaretake, Polia megalopora, Wet Rot, Wet Rottake Modoki, Watagusaretake, Chalk Anatake, Namidatake, Serpura incrassa Bamboo, Ginkgo mushroom, Hoshigetake, Ogasawara Harihiratake can be mentioned. Among these, it is preferable to have antiseptic performance against C. versicolor and C. versicolor.

The antiseptic performance can be measured in accordance with JIS K1571 (2010) "Wood Preservatives-Performance Standards and Test Methods". The measurement conditions will be described in detail in Examples. The treated and untreated specimens are subjected to antibacterial operation at the same time, and it is effective if the mass reduction rate of the untreated specimen is 30% or more in the case of C. versicolor and 15% or more in the case of C. versicolor.

The antiseptic performance can also be evaluated by the plate assay test described below. That is, 18 g of glucose, 1.35 g of peptone, 6.75 g of malt extract, and 837.9 g of purified water were placed in a 1000 ml Erlenmeyer flask to dissolve them, and then 6.75 g of agar was added and the sample was autoclaved at 121 ° C. for 20 minutes. In addition, mix and solidify on a clean bench. The mycelial pieces are punched out from the colonies of the target wood-rotting fungi (C. versicolor and C. versicolor) and incubated on an agar medium at 26 ° C. for 1 week. The sample concentration that completely suppresses the growth of radial hyphae is defined as the minimum inhibitory concentration (MIC).

Examples of termites include Formosan subterranean termites, Reticulitermes minor, and Incisitermes minor. Among these, it is preferable to have anti-termite performance against Formosan subterranean termites.

The anti-termite performance can be measured in accordance with JIS K1571 (2010) "Wood Preservatives-Performance Standards and Test Methods". The measurement conditions will be described in detail in Examples. The treated test piece and the untreated test piece are subjected to feeding damage operation at the same time, and it is effective if the mass reduction rate of the untreated test piece is 20% or more.

<Arbitrary ingredient>
The wood preservation composition may contain other termiticide components, preservative components, solvents, surfactants, thickeners, pigments and resins in addition to penflufen and neonicotinoid-based termiticide.

Examples of the termiticide other than the neonicotinoid termiticide include pyrethroid termiticide such as bifenthrin and silafluofen, phenylpyrazole termiticide such as fipronil and pyriprol, and metadiamide termiticide such as brofuranilide. ..

Preservatives other than penflufen include iodine-based preservatives such as iodopropynylbutylcarbamate (IPBC), 3bromo-2,3 diiodot2-propynylethyl carbonate (EBIP), and p-chlorophenyl-3-iodo-propagilformal (EBIP). CPIPF), triazole compounds such as cyproconazole, tebuconazole, propiconazole, hexaconazole and the like can be mentioned.

When an antiseptic component other than penflufen is contained, the concentration in the wood preservation composition is preferably 0.025 to 0.1% by weight, more preferably 0.05 to 0.1% by weight.

Examples of the solvent include water, alcohol-based solvent, glycol-based solvent, glycol ether-based solvent, glycol ester-based solvent, ketone-based solvent, glyme-based solvent, and other special solvents.

Examples of the alcohol solvent include benzyl alcohol, n-butanol, isobutyl alcohol, 3-methoxy-3-methyl-1-butanol, and 3-methoxy-3-methyl-1-butyl acetate. Examples of the glycol-based solvent include ethylene glycol, diethylene glycol, triethylene glycol, and propylene glycol. Glycol ether-based solvents include methyl carbitol, ethyl carbitol, butyl carbitol, methyl triglycol, propylene glycol monomethyl ether, 1-methoxy-2-propanol, polyethylene glycol monomethyl ether, propylene glycol monobutyl ether, 3-methoxy-. Examples thereof include 3-methyl-1-butanol and dipropylene glycol methyl ether. Examples of the glycol ester solvent include ethylene glycol monoethyl ether acetate, propylene glycol monomethyl ether acetate, diethylene glycol monobutyl ether acetate, and diethylene glycol monoethyl ether acetate. Examples of the grime-based solvent include dipropylene glycol dimethyl ether, triethylene glycol dimethyl ether, diethylene glycol dimethyl ether, and triethylene glycol dimethyl ether. Examples of the ketone solvent include diacetone alcohol, cyclohexanone, and isophorone. Examples of other special solvents include 1,3-dimethyl-2-imidazolidinone (DMI), N-butylpyrrolidone (NBP), N-dimethylfatty acid amide, and dibasic acid ester (DBE). Since penflufen and neonicotinoid termiticide have low solubility in alcohol-based solvents, glycol-based solvents, and special solvents, they are dissolved by heating to 40 to 100 ° C. A wood preservation composition having high storage stability can be produced without using a solvent such as N-methylpyrrolidone by blending N-dimethyl fatty acid amide or rosin ester to prevent crystallization during storage (low temperature).

The wood preservation composition of the present invention preferably has a solid content of 10 to 60% by weight, more preferably 30 to 50% by weight. By adding a solvent, the solid content can be adjusted as appropriate.

Examples of the surfactant include nonionic surfactants, anionic surfactants and cationic surfactants.

Nonionic surfactants include polyoxyethylene polycyclic phenyl ether, polyoxyethylene distyrene phenyl ether, polyoxyethylene tristyrene phenyl ether, polyoxyethylene tribenzylated phenyl ether, and polyoxyalkylene polystyryl phenyl ether. , Polyoxyethylene laurylphenyl ether and the like. Products include Emulsifier B66 (Made by Kao), Emulgen A-60 (Made by Kao), Emulgen A-90 (Made by Kao), EMULSOGEN EL 360 (Made by Clariant Japan), EMULSOGEN TS 160 (Made by Clariant Japan), New Call 2609. (Manufactured by Nippon Emulsifier), Neugen EA-137 (manufactured by Dai-ichi Kogyo Seiyaku), DKS NL-Dash 408 (manufactured by Dai-ichi Kogyo Seiyaku), DKS NL-Dash 410 (manufactured by Dai-ichi Kogyo Seiyaku). Among these, those having an HLB value of 10 to 15 are preferable.

Examples of the anionic surfactant include calcium dodecylbenzene sulfonate, sodium dodecylbenzene sulfonate, polyoxyethylene styrene phenyl ether sulfate, polyoxytridecyl ether phosphate ester, and polyoxyethylene alkyl (C8) ether phosphate ester. And so on.

Examples of cationic surfactants include benzalkonium chloride, coconatamine acetate, benzethonium chloride, NN didecyl NN-dimethylammonium chloride (DDAC), NN didecyl N-methylpolyoxyethyl ammonium propinate (DMPAP), and didecyldimethyl. Examples include ammonium methylsulfate.

When a surfactant is contained, the concentration in the wood preservation composition is preferably 15 to 20% by weight, more preferably 20 to 30% by weight.

The thickener is used for the purpose of improving workability by adjusting the viscosity and viscosity and preventing the precipitation of the drug during the storage period. As the thickener, known thickeners such as urethane-based thickeners, acrylic thickeners, cellulosic thickeners, and clay minerals such as bentonite can be used. In particular, urethane-based thickeners are preferable in terms of performance such as water resistance. When a thickener is contained, the concentration in the wood preservation composition is preferably 0.5 to 5.0% by weight.

The wood preservation composition of the present invention can be suitably used as a clear paint substantially free of pigments, but may contain pigments. Examples of the pigment include inorganic pigments (white pigments such as titanium oxide, yellow pigments such as titanium yellow, red pigments such as iron oxide red, green pigments such as chrome green, blue pigments such as cobalt blue, and black pigments such as carbon black. Pigments, etc.), organic colorants (azo dyes, phthalocyanine dyes, lake dyes, etc.), extender pigments (calcium carbonate, barium sulfate, aluminum hydroxide, mica, talc, alumina, bentonite, magnesium oxide, etc.), gloss pigments (Metal foils such as stainless flakes, metal powders such as aluminum powder and zinc powder) and the like can be mentioned, and these can be used alone or in combination of two or more. When the pigment is contained, the concentration in the wood preservation composition is preferably 10 to 55% as the pigment volume concentration (PVC).

As the resin, either a thermoplastic resin or a thermosetting resin can be used as long as it is soluble in water. Examples of the thermoplastic resin include polyalkylene terephthalate resin, polyvinyl alcohol (PVA), polyvinyl acetate-polyvinyl alcohol (Poval), ethylene-vinyl acetate (EVA) and other emulsion resins, polycarbonate resin, acrylic resin, methacrylic resin and polyamide resin. , Polyvinyl resin, polyurethane resin and the like, and one or more of these can be used. Examples of the thermosetting resin include phenol resin, urea resin, melamine resin, unsaturated polyester resin, silicone resin, alkyd resin, epoxy resin and the like, and one or more of these can be used. When a resin is used, a corresponding curing agent can be added if necessary.

<Preparation method>
The method for preparing the wood preservation composition of the present invention is not particularly limited, and can be prepared by a conventional method in which each component is mixed. In the preparation of the composition, the components may be mixed together or in any order. As an example, there is a method in which a neonicotinoid termiticide and penflufen are added to a solvent and heated to dissolve them, and then a surfactant is added and mixed.

<Application method>
Examples of the method for applying the wood preservation composition of the present invention to wood include a painting method, a dipping method, an impregnation method, and an irrigation method.

Examples of the coating method include coating with a brush, roll coating, and spray coating (for example, air spray, airless spray coating, etc.). The retention amount, that is, the amount of the wood preservation composition taken up by the wood is preferably 60 to 300 g / m ² .

In the case of the dipping method, it is preferable to completely immerse the wood in a bath containing the wood preservation composition for a few seconds to a few minutes. The retention amount of the wood preservation composition after soaking is preferably 60 to 300 g / m ² .

Impregnation methods include vacuum process, double vacuum process, vacuum-pressurization process, pressurization injection process. For a relatively homogeneous and deep distribution of the wood preservation composition, it is preferable to use a pressure process.

In addition, in the case of producing a wood / plastic composite material containing, for example, a wood preservation composition, for example, wood particles, a thermoplastic polymer, and a wood preservation composition are mixed while applying thermal energy. It may be extruded or spray molded at the same time as mixing.

After being applied to wood, the wood preservation composition of the present invention can be dried at room temperature (for example, 15 to 25 ° C.) or by heating (for example, heating at 50 to 100 ° C.).

The wood preservation composition of the present invention may be used as an undercoating agent so as to be in direct contact with wood. Further, it may be applied as a top coat or an intermediate coat on a coating layer previously formed on wood.

Examples of the wood to which the wood preservation composition is applied include building structures, transportation equipment, bridges, signboards, signers, woodwork products, and the like. The wood preservation composition of the present invention is also effective for a composite material of wood and resin and a composite material of wood and metal. The tree species of this material is not particularly limited, and examples thereof include tamo wood, ash, sugi, spruce, pine, fir, spruce, and wood (SPF wood) in which pine and fir are mixed.

The present invention is also wood treated with the above wood preservation composition. The wood of the present invention is resistant to rotting fungi and termites and can maintain the strength and appearance of the wood for a long period of time. Further, the wood products made of the wood, for example, building structures, transportation equipment, bridges, signboards, signers, woodwork products, etc. are also the objects of the present invention. Further, the composite material of wood and resin and the composite material of wood and metal are also the objects of the present invention.

Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to the following examples. Hereinafter, "part" or "%" means "part by weight" or "% by weight", respectively, unless otherwise specified.

(1) Materials used (1-1) Preservative ingredient Penflufeniodopropynylbutylcarbamate (IPBC)
(1-2) Anti-termite component imidacloprid (1-3) Surfactant Dodecylbenzenesulfonate Calcium polyoxyethylene distyrene phenyl ether Chloride benzalconium Coconut amine acetate (1-4) Alcohol-based solvent benzyl alcohol Polyethylene glycol Monomethyl Ether N-Dimethyl Fatty Acid Aamide (1-5) Test Bacteria / Test Insect Phenyl.
Trametes (formerly known as Coriolus) versicolor (L .: Fr.) Pilat FFPRI 1030)
Formosan subterranean Formosanus SHIRAKI

(2) Examples 1 to 7 and Comparative Examples 1 to 12
The compositions shown in Table 1 below were prepared. In Table 1, the blending amount of each component was shown in% by weight, and the balance was water. Each composition was diluted 20-fold with water and subjected to an antiseptic test and an antiseptic test under the conditions described below.

(3) Antiseptic test conditions 110 ± 10 g / m ² of the sample was applied to a piece of wood (sugi sapwood (wood mouth surface 5 mm × 20 mm, length 40 mm)) and left at room temperature for 7 days or more. The number of test specimens was set to 9 for each sample. Sea sand and a liquid medium suitable for the growth of fungi were placed in a glass bottle, and aseptically inoculated with C. versicolor or C. versicolor, and cultured at 26 ° C. for 2 weeks. When the hyphae of the rotting fungus spread on the medium, three test specimens fixed on the hyphae with a plastic frame were placed, and the culture bottle was allowed to stand at 26 ° C. and a relative humidity of 70% or more for 12 weeks. After the antibacterial operation was completed, the degree of decay of the test piece was determined from the mass reduction rate. The untreated test piece (Comparative Example 12) was used to determine the vitality of the cultured bacteria in the antibacterial operation. The untreated test piece was subjected to antibacterial operation at the same time, and if the mass reduction rate was 30% or more in the case of C. versicolor and 15% or more in the case of C. versicolor, the cultured bacteria were judged to be effective. When the mass reduction rate is 3% or less, the performance standard of the wood preservative is satisfied.

(4) Anti-termite test conditions 110 ± 10 g / m ² of the sample was applied to a piece of wood (sugi sapwood (wood mouth surface 10 mm × 10 mm, length 20 mm)) and left at room temperature for 7 days or more. The number of test specimens was set to 5 for each sample. Place one test piece in a breeding container with the end of the tree facing up and down, put the test insects (150 ants and 15 soldiers), and place the breeding container in a dark place at 28 ° C. Was left to stand for 21 days. After the completion of the feeding damage operation, the degree of feeding damage of the test piece was determined from the mass reduction rate, and when the mass reduction rate was 3% or less, the performance standard of the wood preservative was satisfied. The untreated test piece (Comparative Example 12) was used to determine the vitality of the test insect in the feeding damage operation. The untreated test piece was subjected to feeding damage operation at the same time, and if the mass reduction rate was 20% or more, the test insect was judged to be effective.

As shown in Table 1, Comparative Examples 1 and 9 to 10 containing only the antiseptic component have insufficient antiseptic performance, and Comparative Examples 2 to 3 and 6 to 8 containing only the antiseptic component have insufficient antiseptic performance. Met. Examples 1 to 7 had antiseptic and anti-termite properties against Ozuratake by containing penflufen and a neonicotinoid-based termiticide.

Claims (10)

A wood preservation composition containing penflufen and a neonicotinoid termiticide. The wood preservation composition according to claim 1, wherein the concentration of penflufen is 0.025% by weight or more. The wood preservation composition according to claim 1 or 2, further comprising an iodine-based antifungal agent. The wood preservation composition according to any one of claims 1 to 3, which does not contain N-methylpyrrolidone. The wood preservation composition according to any one of claims 1 to 4, further comprising water, benzyl alcohol, and N-dimethyl fatty acid amide. The wood preservation composition according to any one of claims 1 to 5, further comprising a surfactant. The wood preservation composition according to any one of claims 1 to 6, wherein the neonicotinoid-based termiticide is imidacloprid. The wood preservation composition according to any one of claims 3 to 7, wherein the iodine-based antifungal agent is iodopropynylbutylcarbamate. The wood preservation composition according to any one of claims 1 to 8, for suppressing the growth of C. versicolor and C. versicolor. Wood treated with the wood preservation composition according to any one of claims 1 to 9.