JP2010126456A - Wood preservation composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To bring about an effect of preventing the growth of fungi, discoloration fungi, and decay fungi growing in wood, since a sufficient effect of a drug is no more obtained because the kind of microorganisms against which the drug is effective is limited and the effect of the drug is deteriorated. <P>SOLUTION: By using a preparation obtained by combining at least one compound selected from an iodine compound and a sulfamide compound with a urea compound, the growth of fungi, discoloration fungi, decay fungi of wood is prevented compared to the case of singly using these compounds, and the preparation can be utilized as a wood preservation composition. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a wood-preserving composition used for preventing mold, discoloration, and decaying fungi that occur on wood.

Development of highly safe wood preservatives has been actively carried out, and iodine-based compounds and sulfamide-based compounds are often added to prevent the occurrence of mold in wood. However, the use of these single components alone does not provide sufficient efficacy due to the limited species of microorganisms that are effective and the effectiveness of the drug has deteriorated, increasing the amount of drug used and increasing the cost. Are often high. For this reason, various antifungal agents have been combined to try to stabilize the antifungal spectrum and enhance the antifungal efficacy, but usually only one of the effects is achieved or only an additive effect is obtained. There is no actual situation. For example, Japanese Patent Application Laid-Open No. 2-164803 proposes a method in which an iodine compound and a benzimidazole compound are used as a mixture. Further, JP-A-7-133205 proposes a method in which an iodine compound and an isothiazoline compound are combined. However, fungi generated on wood are not only mold but also discolored and decaying fungi, and a drug with a broader antibacterial spectrum that is effective against these is desired.
Japanese Patent Laid-Open No. 2-164803 JP 7-133205 A

The object of the present invention is to dramatically increase the fungicidal effect on wood and to suppress the growth of discolored and decaying fungi.

As a result of intensive research on the antifungal and antifungal discoloration fungi composition that compensates for the above lack of efficacy, the present inventor has obtained at least one compound selected from iodine compounds or sulfamide compounds and a urea compound as an active ingredient. When combined, it was found that the fungicidal efficacy increased dramatically compared to the case where each was used alone, and that the discoloration and decaying fungi also had growth inhibition.

By using the composition of the present invention, wood can be protected from mold, discoloration bacteria, and decaying fungi.

As urea compounds, 3- (3,4-dichlorophenyl) -1,1-dimethylurea (generic name: diuron), 3- (3,4-dichlorophenyl) -1-methoxy-1-methylurea (generic name) : Linuron), 3- (5-tert-butyl-3-isoxazole) -1,1-dimethylurea, (isouron), 1- (α, α-dimethylbenzyl) -3- (paratolyl) urea (general Name: Daimlone), 1- (2-Chlorobenzyl) -3- (1-methyl-1-phenylethyl) urea (generic name: cumylron), 1- (5-tert-butyl-1,3,4-thiadiazole) -2-yl) -1,3-dimethylurea (generic name: tebuthiuron), 4,6-dimethoxy-1,3,5-triazin-2-yl) -3- [2- (2-methoxyethoxy) phenyl Sulfoni L] urea (generic name: sinosulfuron), 1- (4,6-dimethoxypyrimidin-2-yl) -3- (2-ethoxyphenoxysulfonyl) urea (generic name: ethoxysulfuron), 1- [2- ( Cyclopropylcarbonyl) anilinosulfonyl] -3- (4,6-dimethoxypyrimidin-2-yl) urea (generic name: cyclosulfamuron), 1- (4,6-dimethoxypyrimidin-2-yl) -3 -[1-Methyl-4- (2-methyl-2H-tetrazol-5-yl) pyrazol-5-ylsulfonyl] urea (generic name: azimusulfuron) and the like can be mentioned, and in particular, 3- (3,4- Dichlorophenyl) -1,1-dimethylurea (generic name: diuron) is preferred.

Examples of iodine compounds include 3-iodo-2-propynylbutyl carbamate, p-chlorophenyl-1-3-iodopropargyl formal, 1-bromo-3-ethoxycarbonyloxy-1,2-diiodo-1-propene, Polyvinylpyrrolidone iodine, diiodomethyl-p-tolylsulfone and the like can be mentioned, and 3-iodo-2-propynylbutyl carbamate is particularly preferable.

Examples of the sulfamide-based compound include N, N-dimethyl-N ｀-(fluorodichloromethylthio) -N ｀ ｀-phenylsulfamide (generic name: dichlorofluoride), N-dichlorofluoromethylthio-N ｀, N｀- Examples thereof include dimethyl-Np-tolylsulfamide (generic name: trifluanide), and N, N-dimethyl-N ｀-(fluorodichloromethylthio) -N ｀ ｀-phenylsulfamide is particularly preferable.

  The wood preservation composition of the present invention can be used not only directly on wood but also by a treatment method such as dipping or pressure injection. Further, it may be added to a paint for wood, a water repellent, a horimarin catcher agent, an adhesive for a wood material, or the like.

Although the wood preservation composition of the present invention can be directly applied according to the purpose of use, it is generally used as a dosage form such as an oil, emulsion, paste, suspension or the like. The polar solvent used in formulating may be used alone or in combination of two or more. Two or more polar solvents and nonpolar solvents may be combined. Surfactants may or may not be used. When they are used, any of nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants may be used. Absent. In addition, other fungicides, bactericides, insecticides, rust inhibitors, deterioration inhibitors and the like can be used in combination.

EXAMPLES Next, although an Example demonstrates in detail, this invention is not limited by these.

Table 1 shows the wood preservation compositions of Examples 1 to 16 and Comparative Examples 1 to 8. The mixture was mixed with glass beads having a diameter of 1 mm, pulverized for about 15 minutes, and filtered through a wire mesh to obtain a fungus-proof and anti-color-change fungus dispersion composition. Neukalgen FS-26 (manufactured by Takemoto Yushi Co., Ltd.) was used as the dispersant, and Kelzan S (manufactured by Kelco) was used as the thickener.

(Test Example 1 Wood mold prevention test)
A pine sapwood (2 cm × 5 cm × 0.3 cm) is dipped in the solution of the antifungal discoloration-proofing fungus composition for wood of Examples and Comparative Examples diluted to a specified concentration with water, and then air-dried. This test piece was placed on a potato dextrose agar medium (hereinafter referred to as PDA medium), sprinkled with 1 ml of a mixed spore suspension and cultured at 26 ° C. and 95% humidity for 28 days. The degree of mold growth was displayed according to the criteria shown in Table 2. The results are shown in Table 3.
Test bacteria
Aspergillus niger
Penicillium funiculosum
Aureobasidium pullulans
Gliocladium virens
Cladosporium cladosporioides
Neurospora sp.

(Test Example 2 Anti-discoloring fungus test on wood)
A PDA medium is solidified in a petri dish and an untreated bay pine (bait tree) sterilized with ethylene oxide gas is placed. In addition to this, the wood-discoloring bacterium Ceratocystis sp. 2 ml of the spore suspension was added dropwise and pre-cultured at 26 ° C. and 90% relative humidity for 2 weeks. On the other hand, the pine sapwood (2 cm × 5 cm × 0.3 cm) was immersed for 30 seconds in the solutions of the antifungal discoloration-proofing fungus composition for wood of Examples and Comparative Examples diluted to a specified concentration with water. And then air dry. After the pre-culture, the test specimen treated with the drug was placed on the prey where the fungus grew and cultured for 28 days at 26 ° C. and 90% relative humidity. . The results are shown in Table 3.

(Test Example 3 Wood Preservation Test)
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 Oozuratake 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>
110 ± 10 g of a chemical solution obtained by diluting Examples 1, 5, 11 and Comparative Examples 1, 5, 7 to a prescribed concentration on a cedar and beech wood piece having a thickness of 20 mm × 40 mm and a thickness of 5 mm, with the end of which is sealed with epoxy resin / M ² was applied. 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 the cultivation, 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 4.
Mass reduction rate (%) = (mass immediately after weathering operation−mass after culturing for 12 weeks) / mass immediately after weathering operation × 100

By using a preparation comprising a combination of at least one compound selected from iodine-based compounds or sulfamide-based compounds and a urea-based compound, growth of mold, discoloration and decay of wood can be prevented, and it can be used in the field of wood preservation.

Claims (4)

A wood preservation composition comprising at least one compound selected from iodine-based compounds or sulfamide-based compounds and a urea-based compound as active ingredients. The wood preservation composition according to claim 1, wherein the urea compound is 3- (3,4-dichlorophenyl) -1,1-dimethylurea. The wood preservation composition according to claim 1 or 2, wherein the iodine compound is 3-iodo-2-propynyl butyl carbamate. The wood preservation composition according to any one of claims 1 to 3, wherein the sulfamide-based compound is N, N-dimethyl-N ｀-(fluorodichloromethylthio) -N ｀ ｀-phenylsulfamide.