JP2006076222A - Method for preserving wood - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for preserving wood by preventing the putrefaction of woody materials including lumber and plywood. <P>SOLUTION: In the wood preservation method, a flowable formulation containing an N-substituted triazole sterilization compound as an effective component and having an average particle size of 2.0 μm or below are used for treating the woody materials to prevent putrefaction by fungi such as Kawaratake (Trametes versicolor) and Ohuzuratake (Formitopsis palustris). As the sterilization compound, Cyproconazole, Tebconazole, Propiconazole, Azaconazole, Hexaconazole, or the like is used. Hexaconazole is preferably used. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for preserving wooden materials such as wood and plywood.

  Wood materials such as wood and plywood used for building materials are treated with antiseptics to prevent decay due to Kawaratake, Ozuratake, etc. It is known that N-substituted triazole fungicides are effective against wood decay fungi, and cyproconazole, tebuconazole, propiconazole, and azaconazole have been used as oils and emulsions (Non-patent Document 1). Recently, water-based preparations are increasing due to safety and odor problems, but wood preservatives using water-based preparations containing N-substituted triazole fungicides as active ingredients have not been known.

Shiroari Japan Shiroari Countermeasure Association 2004, No136

  It is an object of the present invention to provide a method for preserving woody materials such as wood and plywood.

As a result of intensive studies on a method for solving the above-mentioned problems, the present inventor solved this problem by using a flowable preparation having an N-substituted triazole-based bactericidal compound as an active ingredient and an average particle size of 2.0 μm or less. The present invention has been found out to obtain a method for carrying out the present invention.

  By using a flowable preparation having an N-substituted triazole-based fungicidal compound as an active ingredient and an average particle size of 2.0 μm or less, it was possible to prevent decay due to Kawaratake, Ozuuratake, etc.

  Examples of the N-substituted triazole fungicidal compound used in the present invention include cyproconazole ((2RS, 3RS) -2- (4-chlorophenyl) -3-cyclopropyl-1- (1H-1,2,4-triazole). -1-yl) butan-2-ol), hexaconazole ((RS) -2- (2,4-dichlorophenyl) -1- (1H-1,2,4-triazol-1-yl) hexane-2 -Ol), propiconazole ((RS) -1- [2- (2,4-dichlorophenyl) -4-propyl-1,3-dioxolan-2-ylmethyl] -1H-1,2,4-triazole) Debuconazole ((RS) -1-p-chlorophenyl-4,4-dimethyl-3- (1H-1,2,4-triazol-1-ylmethyl) pentan-3-ol), ipconazole ( 1RS, 2SR, 5RS; 1RS, 2SR, 5SR) -2- (4-chlorobenzyl) -5-isopropyl-1- (1H-1,2,4-triazol-1-ylmethyl) -1-cyclopentanol) , Azaconazole (1-[[2- (2,4-dichlorophenyl) -1,3-dioxolan-2-yl] methyl] -1H-1,2,4-triazole), epoxyconazole ((2RS, 3SR) -1- [3- (2-chlorophenyl) -2,3-epoxy-2- (4-fluorophenyl) propyl] -1H-1,2,4-triazole), etc. A mixture of more than one can be used. Of these N-substituted triazole-based fungicidal compounds, hexaconazole is preferable in terms of antiseptic performance.

The N-substituted triazole fungicidal compound to be blended in the flowable preparation used in the present invention is preferably contained so as to be 0.01 to 30% by weight in the composition, more preferably 0.05 to 10% by weight. preferable. Further, the average particle size of the flowable preparation used in the present invention is essential to be 2.0 μm or less, and preferably 1.0 μm or less. When the particle diameter exceeds 2.0 μm, not only the antiseptic performance is inferior, but also leaching due to water occurs and no residual effect is observed.

  The wood preservation method of the present invention is not particularly limited as long as an N-substituted triazole compound is used as an active ingredient and a flowable having an average particle size of 2.0 μm or less is used. For example, pressure injection, vacuum injection, immersion treatment, Wood can be preserved in known processing methods such as spraying and coating. Among these methods, immersion treatment, spray treatment, and coating treatment are preferable because they exhibit a particularly high wood preservation effect.

Next, although an Example and a test example demonstrate in detail, this invention is not limited by these.
(Examples 1-8 and Comparative Examples 1-4)
Formulation Example 1
Hexaconazole 20% by weight, New Calgen FS-26 (manufactured by Takemoto Oil & Fat Co., Ltd.) 5% by weight, and ion-exchanged water 50% by weight are mixed and pulverized for 120 minutes by a Glen mill. Thereafter, 0.25% by weight of Kelzan S (manufactured by Kelco) and 24.75% by weight of ion-exchanged water are added and stirred for 30 minutes.

  Using hexaconazole, cyproconazole and tebuconazole as N-substituted triazole fungicidal compounds, preparation examples 2 to 8 and comparative examples 1 to 3 were obtained only by changing their amounts and grinding time. Table 1 shows formulation examples and Table 2 shows comparative examples. The active ingredient concentrations shown in the table are all by weight.

試験例１ 木材防腐効力試験

Test Example 1 Wood preservative efficacy test

The antiseptic effect test was done about the wood piece which processed the flowable agent manufactured by the Example and the comparative example. The test was conducted as follows according to the indoor preservative test method and performance standard (JWPS-FW-S.1) of the wood preservative for surface treatment of the Japan Wood Preservation Association.
Test fungus Ozu Ratake Fomitopsis palustris Brown-rot fungus Kawaratake Trametes versicolor White-rot fungus Preparation of test medium

After putting 350 g of sea sand in a 900 ml mayonnaise bottle and adding 100 ml of the following culture solution to sterilize, aseptically put one small piece of beech wood in which the above basidiomycetes were sufficiently grown separately in advance, temperature 26 ± The culture medium was cultured at 2 ° C. and a relative humidity of 70% or more for 10 to 15 days, and the fungus was sufficiently spread on the culture medium to serve as a test medium.
Sample preparation

Example 1 and Comparative Example 1 were each diluted by 50 and 100 times, and Example 6 and Comparative Example 2 were each diluted by 30 and 60 times, respectively, and the end face was sealed with an epoxy resin at 20 mm × 40 mm and thickness was 5 mm. The cedar and beech wood pieces were applied at 110 ± 10 g / m ² . After leaving at room temperature for 20 days or more, the following weather resistance operation was performed.
Weatherproof operation

Nine pieces of wood treated with chemicals are placed in a 500 ml capacity beaker as a set, and ion-exchanged water (360 ml) 10 times the volume of the wood pieces is poured into the beaker, and appropriate weights are applied to prevent the wood pieces from floating. After being submerged under the surface of the water, it was leached at a water temperature of 25 ± 3 ° C. for 5 hours and subsequently dried at 40 ± 2 ° C. for 19 hours. The above operation was repeated 10 times alternately.
After the weathering operation was completed, the sample was dried at a temperature of 60 ± 2 ° C. for 48 hours, and the mass of the sample left in a desiccator for 30 minutes was measured.
Test method

Three samples were subjected to weathering, Kawaratake was placed directly, and Ozuratake was placed on a sterilized plastic net on which the fiber direction was placed vertically, where the temperature was 26 ± 2 ° C and relative humidity was 70% or more. For 12 weeks.
After culturing, the wood pieces from which the attachments such as mycelia were removed were dried at a temperature of 60 ± 2 ° C. for 48 hours and left in a desiccator for 30 minutes to measure the mass of the sample. Compared with the weight immediately after the weathering operation, which was measured in advance, the mass reduction rate was determined by the following formula. The test results are shown in Table 3.
Mass reduction rate (%) = (mass immediately after weathering operation−mass after culturing for 12 weeks) / mass immediately after weathering operation × 100

By using a flowable preparation having an average particle size of 2.0 μm or less of an N-substituted triazole-based fungicidal compound, it is possible to prevent the decay of woody materials such as wood and plywood and to use it in the field of wood preservation.

Claims (2)

  A method for preserving wood, comprising using a flowable preparation having an N-substituted triazole fungicidal compound as an active ingredient and an average particle size of 2.0 µm or less. The wood preservation method according to claim 1, wherein the N-substituted triazole fungicidal compound is hexaconazole.