JPH02142707A - Wood antiseptic - Google Patents

Abstract

PURPOSE:To obtain a wood antiseptic showing excellent antiseptic effects on main wood destroying fungi such as Coriolus versicolor, Tyromyces palustris or Serpla lacrymans, having low toxicity to human and animals, being inexpensively synthesized, having safety free from pollution, containing an imidazole- based compound as an active ingredient. CONSTITUTION:A wood antiseptic containing an imidazole-based compound shown by the formula (R1 is lower alkyl; R2 is alkenyl) as an active ingredient. When the antiseptic is used, the compound is prepared into oil, emulsion, solution, etc. The content of the compound of the active ingredient in the preparation is 0.001-95wt.%, preferably 0.01-90wt.% and, for example, the content is 0.01-5wt.% in the case of dust, 0.01-10wt.% in the case of granule and 1-75wt.% in the case of wettable powder or emulsion. In the preparation, kaolin, talc, etc., or methyl alcohol may be cited as a carrier and polyoxyethylene alkyl aryl ether, etc., as a surfactant.

Description

DETAILED DESCRIPTION OF THE INVENTION A) Object of the invention relates to a wood preservative containing an imidazole compound represented by the formula [wherein R1 represents a lower alkyl group and R2 represents an alkenyl group] as an active ingredient. be.

The wood preservative of the present invention has an excellent preservative effect against major wood-decaying fungi such as Corsifolia versicolor, Versicolor versicolor, and Namidatake, which rot the wood used as structural materials and interior materials of houses, sometimes causing serious damage.

BACKGROUND OF THE INVENTION The imidazole compound represented by the above general formula (I), which is an active ingredient of the present invention, was discovered by the present inventors. These compounds can be used as seed disinfectants to treat rice seedling blight, sesame leaf blight, and wheat patchy leaf diseases, and as foliar sprays to treat powdery mildew, pharyngeal scab, and citrus green mold in various crops. "A farm that is effective against diseases such as blue mold" 1
．． It is known as a germicidal agent (JP-A-Sho [io-26
Publication No. 0572).

However, the use of the imidazole compound (I) as an ice phase preservative is completely unknown.

It is also known that some compounds of imidazole compounds and triazole compounds, which are known as agricultural and horticultural fungicides, have antibacterial activity against wood-decaying fungi [Japanese Society of Plant Pathology, Vol. 52, No. 4] Pages 599-609 (I98B)
, British Crop Protection Conference (British c+・0pprotec
tion conrerence), pages 33 to 39 (I986)).

However, these compounds have not been put to practical use as wood preservatives.

On the other hand, various wood preservatives have been developed and put into practical use. However, these ice-phase preservatives are not necessarily satisfactory in terms of handling or safety. For example, Ura Solu Irrigation 1! /j Preservatives such as phenols and organic soot compounds (e.g. tributyl soot oxide) are toxic to humans and animals, such as skin irritation, and have an odor.

In addition, naphthenic acid metal salts, chlornaphthalenes, and the like, which are known as oil-soluble holopreservatives, have low preservative effects and require high concentration treatment. In addition, chromated arsenic steel preservatives, which are known as water-soluble wood preservatives, contain arsenic and must be handled with great care, and conventional preservatives have various problems ( "Knowledge of water conservation" pages 69 to 81 [incorporated association] - 1 book published by the Wood Preservation Association (I98
[i)) I.

Problems to be Solved by the Invention As mentioned above, conventional ice-phase preservatives often have problems such as toxicity to humans and animals including rashes, environmental pollution, control costs, and preservative efficacy. In view of this current situation, it was decided that the main water-use plants such as Versicolor versicolor, Versicolor volcanicus, and Namida mushroom would be depleted. 7j It is an object of the present invention to provide a highly safe wood preservative that has excellent rotting effects, low toxicity to humans and animals, and is safe and has no pollution rating.

Means for Solving the Constituent Problems of the Invention The present inventors have conducted intensive research using a large number of compounds in order to achieve the above objective R1. As a result, it was found that the imidazole compound (I) meets the purpose and exhibits extremely high antiseptic effects and safety.

Therefore, the present invention comprises a tree trunk disease control agent containing the imidazole compound represented by the general formula (I) as an active ingredient.

In the formula (I), R represents a lower alkyl group, examples include methyl, ethyl, n-propyl, i-propyl,
Examples include n-butyl, i-butyl, 5ee-butyl, t-butyl, and the like. R2 represents an alkenyl group and has 2 carbon atoms
-8, especially '3-6 alkenyl groups are preferred, examples being ethynyl, propenyl, 1 (2 or 3)
-butenyl, 1 (2,3 or 4)-pentenyl, 1
(2,3,4 or 5)-hexenyl, 1 (2,3
,4,5 or 6)-hezotenyl, 1 (2,3,4,
Examples include 5, 6 or 7)-octenyl. Particular preference is given to 2-butenyl, 3-butenyl or 4-pentenyl.

Particularly preferred examples of the compounds of formula (I) are shown in the table below. The compound numbers in the table are also referred to in the Examples and Test Examples below.

Table 1 Effects The compound of general formula (I), which is the active ingredient of the wood preservative of the present invention, acts as an excellent preservative active ingredient in i)L against major wood-decaying fungi such as C. versicolor, Versicolor, and Namidatake. do.

Examples (Method of Formulation) In carrying out the present invention, in order to efficiently exhibit the wood preservative effect, the compound of general formula (I) can be formulated into oils, emulsions, liquids, powders, granules, It may be used in formulations such as wettable powders and flowable preparations.

Solid carriers that can be used in formulating the wood preservative of the present invention include clays (for example, kaolin, bentonite, acid clay), talcs (for example, talc, pyrophyllite), silicas (for example, diatomaceous earth, silica sand, Examples include inorganic mineral powders such as mica, synthetic highly dispersed silicic acid), pumice, and sand. Examples of liquid carriers include the following, which can be used alone or in combination.
It may be used in the form of a mixture of more than one species. Thus, such examples include alcohols (e.g. methyl alcohol, ethyl alcohol, ethylene glycol), ketones (e.g. acetone, methyl ethyl ketone, cyclohexanone), ethyls (e.g. ethyl ether, dioxane, tetrahydrofuran, ethyl cellosolve), fats. group hydrocarbons (e.g. gasoline, kerosene), aromatic hydrocarbons (e.g. benzene, luene, xylene, solvent naphtha, cyclohexane, methylnaphthalene),
halogenated hydrocarbons (e.g. dichloroethane, chlorinated benzene, carbon tetrachloride, chloroform), acid amides (e.g. dimethylformamide, dimethylacetamide),
Examples include esters (eg, ethyl acetate), nitriles (eg, acetonitrile), dimethyl sulfoxide, and the like.

In addition, examples of surfactants that can be used in the wood key IH prevention agent of the present invention include, but are not limited to, the following, and these surfactants may be used alone. They may also be used in the form of a mixture of two or more. That is, such examples include polyoxyethylene alkylaryl ether, polyoxyethylene sorbitan monolaurate, alkylaryl sorbitan monolaurate, alkylbensene sulfonate, alkylnaphthalene sulfonate, lignin sulfonate,
Examples include higher alcohol sulfate ester salts.

Furthermore, examples of dispersants and fixing agents that can be used in the wood preservative of the present invention include casein, gelatin, starch, alginic acid, carboxymethyl cellulose, gum arabic, agar, polyvinyl alcohol, pine oil, bentonite, and lignin.

In the present invention, when producing the various preparations described above, the compound of general formula (I) is added in an amount of 0.001% to 95% (
It is possible to formulate the formulation so that the content is preferably in the range of 0.01% to 90%. For example, for powders, 0.01% to 5%, for granules, 0.01% to 5%.
．． In the case of wettable powders, emulsions, liquids, and oils, it can be contained in a range of 1% to 7596%.

The preparation thus prepared is processed according to conventional wood preservative processing methods. For example, the wood preservative of the present invention can be used as an oil, emulsion, hydrating agent, or flowable agent for unprocessed wood, either as it is or diluted with water or an appropriate solvent, and the amount of active ingredients is 0 per 1 piece. It is preferable to use the amount in the range of .05 to 5 g by a coating method, a blow-on method, a dipping method, a pressure injection method, a diffusion method, or the like. In addition, for wood +4 used for structural shrines and interior materials of buildings, coating methods,
It is best to use a method such as a spraying method or a foam dispersion method. Furthermore, if you want to target the area under the floor of a house, you can spray it directly on the ground in the form of powder, granules, or wettable powder, or use emulsion, emulsion, etc.
A flowable agent or hydrating agent is dissolved in water or a suitable solvent, and the active ingredient amount is in the range of 2 to 100 g per 1M, and the solution is mixed with Yamagami etc. and spread uniformly under the floor. It is best to spray or foam the solution under the floor.

Furthermore, the wood preservative of the present invention may be blended with adhesives and used during the production of plywood and fiberboard, and may also be used in combination with termiticides, insect repellents, insecticides, fungicides, etc. .

The present invention will be explained in detail below.

In addition, parts in the examples indicate parts by weight.

Example 1 (Oil agent) 0.5 parts of compounds No. 2 and 2 are dissolved in 5 parts of dimethylformamide, and 94.5 parts of Byakusaura is added to obtain an oil agent.

Example 2 (Emulsion) 20 parts of compound No. 3 was mixed with 60 parts of isophorone.
20 parts of polyoxystyrene phenyl ether are added thereto and thoroughly mixed to obtain an emulsion.

Example 3 (hydrating agent) 25 parts of compound No. 11, 1 part of white carbon
5 parts of lauryl sulfate, 3 parts of calcium lignin sulfonate, and 55 parts of clay were mixed and ground to obtain a wettable powder.

1 part of rum and 97 parts of diatoms are uniformly mixed and ground to obtain a powder.

Example 5 (Flowable agent) 65 parts of water, 1 part of polyoxyethylene nonylphenyl ether and 4 parts of lignin sulfonic acid sodium salt were added and stirred, and then 20 parts of finely pulverized compound N011 was added and stirred, Furthermore, 10 parts of a 2% xanthan gum aqueous solution is added and stirred to obtain a flowable agent.

79 Effects of the present invention When the wood preservative of the present invention is used, the following effects are brought about.

First, it has an excellent preservative effect on the main types of wood rotting mushrooms, such as Corsifolia versicolor, Veronica japonica, and Namidatake.

Therefore, if wood is treated with the wood preservative of the present invention in advance, it will not decay over a long period of time. The wood to which the wood preservative of the present invention can be applied is not particularly limited, and a wide variety of woods can be used, including beech, cedar, Japanese red pine, cypress, Japanese hemlock, and lauan.

Second, the treatment with the present preservative of the present invention does not cause any deterioration or discoloration of the wood.

Third, the preservative according to the present invention has low toxicity and does not have any bad odor, so it can be used safely.

Next, the usefulness of the present invention will be explained using test examples.

Test Example 1 Antibacterial activity test against wood-decaying fungi Table 2: PSA medium containing a chemical solution adjusted to a predetermined concentration. Corsifolia versicolor and Versicolor versicolor were cultured at 25°C for 51-1 hours, and Porphyra chinensis was cultured at 20°C for 611 days. Thereafter, in order to examine the growth status of these decay fungi, the bacterial flora diameter of each decay fungus was measured using a vernier caliper. The bacterial flora growth inhibition rate (%) was calculated using the following formula.

Diameter of bacterial flora in untreated area Note 1) IPBC (Chemistry 823-Iodo-2-Propynyl Butyl Carbamate) Note 2) The value in parentheses indicates the diameter mm of bacterial flora in untreated area.

Test Example 2 Preservative efficacy test against wood-decaying fungi The test was conducted according to the preservative efficacy testing method of the Japan Wood Preservation Association (JWPA). In other words, a test piece of wood (length 40+nm x width 20mm x
The end surface of the sapwood (with a thickness of 5+ nm) was sealed with epoxy resin, and a test chemical prepared according to Example 1 was applied (the amount of the chemical applied was 110±10 g/I). The test specimens treated with chemicals were air-dried for 20 days, and then divided into two groups: those without and those that were subjected to the following weathering procedure, and the effects thereof were evaluated. That is, in the case of Maegishi, the test specimen was air-dried for 20 times and then subjected to the antibacterial operation shown below, and in the case of the latter, the antibacterial operation shown above was performed after the completion of the next weathering operation.

In the weathering operation, wetting and volatilization operations were alternately repeated 10 times. That is, as a wet operation, the sample was immersed in still water at room temperature for 30 seconds, and then left in a thermostatic chamber at a temperature of 26° C. for 4 hours. After that, as a volatilization operation, 2
It was left for 0 hours.

For antibacterial operation, prepare mayonnaise bottles (outer diameter 8 cm,
Put 250 g of quartz sand into a container (6 cm in diameter and 15 cm in height),
2% of malt extract and 1.0% of peptone were added, and the test bacteria were inoculated into a medium whose surface was covered with broad-leaved wood flour to a thickness of about 2 mm, and the temperature was 26°C (20°C for Namida mushrooms).
The treated test specimens subjected to the above-mentioned weathering operation and the untreated test specimens were cultured at 70% humidity for 15 days, and cultured for 8 weeks. Thereafter, the test specimen was taken out, surface hyphae and other deposits were removed, and after drying at 60° C., it was weighed and the efficacy value was calculated using the following formula.

C. versicolor (shrine test 1030), Buna spp. (monthly installment 0507), Suginami datake (monthly installment 0739), red pine 26°C 26°C 20°C Weight of water-use piece after absorption of sample (g) Average weight loss rate (%) of untreated specimen - Results are shown in Table 3.

(Margin below)

Claims (1)

[Claims] Imidazole compound represented by general formula (I) ▲Mathematical formula, chemical formula, table, etc.▼(I) [In the formula, R_1 represents a lower alkyl group and R_2 represents an alkenyl group] A wood preservative characterized by containing as an active ingredient.