JPS5823201B2 - Mokuzaihoson soseibutsu - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a wood preservation composition characterized by containing a compound represented by the structural formula [I] as an active ingredient.

Wood used as building materials for houses and structures, furnishings, furniture, or general industrial materials is subject to damage by various undesirable organisms, particularly insects, and deterioration by microorganisms.

In particular, damage caused by termites on construction materials, and damage caused by Japanese bark beetles on lauan and oak wood is well known.
Conventional methods for controlling these damages include dieldrin, chlordane, and BHC.

Organochlorine compounds such as PCP, organotin compounds and copper,
Inorganic salt compounds such as arsenic and chromium have been used.

However, all of these compounds are highly toxic, there are restrictions on their use and handling, and in many cases, sufficient treatment cannot be carried out due to safety reasons.

In addition, even relatively safe compounds must be used in large quantities in order to obtain a high effect, which poses the risk of causing environmental pollution.

For these reasons, there has been a strong desire for a wood preservative that is safer and more effective than conventional ones.

Furthermore, regarding insect damage, organophosphorus insecticides are safer agents for crop pests and sanitary pests.
Carbamate insecticides and pyrethroid insecticides have been developed and used to some extent, but they have been completely neglected in wood applications.

That is, although it has sufficient efficacy for agricultural use, household use, livestock use, and grain storage, it has hardly been used for wood preservation.

The reason for this is that when pyrethroid compounds such as pyrethrin and allethrin, which are conventionally used for agriculture and epidemic prevention, and organic phosphorus compounds such as fenitrothion and fenthion are used for wood preservation, they lack stability and This is because the retention effect is so small that it cannot be put to practical use with ordinary technology.

In this regard, methods such as adding various stabilizers and coexisting with special resins have been tried, but they have not been widely used.

In view of this current situation, the present inventors conducted various studies and found that a composition containing a compound represented by the structural formula CI), which is a type of pyrethroid compound, has been found to be suitable for use in agriculture and epidemic prevention. It has been discovered that this product has excellent properties in wood preservation applications that go beyond the concept of pyrethroid insecticides.

That is, the composition containing the compound represented by the structural formula (II) according to the present invention as an active ingredient has a composition containing the compound represented by Structural Formula (II) as an active ingredient, compared to chlordane, a typical insecticidal compound that is currently widely used against wood pests. Not only does it have far superior insecticidal efficacy, but its durability is also outstanding.

In other words, as is clear from the Examples described later, unlike wood treated with the composition of the present invention, its efficacy persisted throughout the test period without any decline, and the composition of the present invention was maintained without any decrease in efficacy. The present invention was completed based on the discovery that the composition exhibits excellent performance as a wood preservation agent.

Other advantages of the composition of the present invention include that it does not irritate the skin or mucous membranes, does not cause irritation, has low toxicity, and has a long-lasting effect due to the special resin treatment found in conventional wood preservation agents. Regarding the implementation of the wood preservation composition of the present invention, which is safe and has high pesticidal power, which also overcomes the disadvantages of processing technology, ordinary wood preservation compositions (wood pest control agents, preventive agents, It is easily manufactured using the manufacturing method of soil treatment agents, insect repellent paints, etc.).

That is, depending on the intended use, the compound CI) can be used directly, dissolved or dispersed in water or a solvent, or adsorbed on a suitable solid carrier (e.g. diluent, vegetable powder, mineral powder or granules, etc.). If necessary, preservatives, emulsifiers, dispersants, synergists, adsorbents, binders, wetting agents, and stabilizers are added to produce oils, emulsions, water conservancies, powders, granules, tablets, and aerosols. It can be used in the form of an appropriate wood preservative such as.

In order to actually treat wood, it is sufficient to follow the method commonly used for conventional chlordane-containing wood treatment agents.

For example, by dipping, spraying or applying the composition of the invention to wood, the wood surface area 1? ? After applying and impregnating a chemical solution at a rate of 100 to 250 t as an o, i to 1% oil agent per Z2, air drying or heating drying is performed.

In addition, when piles or wood buried in the soil must be close to the soil, the composition of the present invention, for example 2 to 10%
If it is an emulsion, apply a 10 times diluted solution to the soil around the wood. ?
Mixing or injection may be performed at a rate of 1 to 10 t per Z2.

On the other hand, in the case of spawning, invading, or feeding damage from the surface of wood, the composition of the present invention can be mixed into a paint and applied.

Next, the present invention will be specifically explained with reference to formulation examples and examples, but the present invention is not limited to these.

Formulation Example 1 An oil solution is obtained by dissolving 0.5 parts of oil compound [I] and 2.5 parts of ethylene dibromide as a penetrating agent in kerosene to make a total of 100 parts.

Formulation example 2 Oil compound [131 parts, N-nitrone-N as a wood preservative
-Aluminum salt of cyclohexylhydroxyamine 1
An oil solution is obtained by dissolving one part in dodecylbenzene to make a total of 1.00 parts.

Formulation Example 3 Oil Compound [131 parts Hi-Resin #60 (trademark of Toho Chemical Industry Co., Ltd.) 5 parts is dissolved in mineral spirit to make a total of 100 parts to obtain an oil compound.

Formulation example 4 Aerosol compound [131 parts, zinc naphthenate 5 parts as a wood preservative]
Dissolve 0.5 parts of fragrance in 40 parts of deodorized kerosene, fill it into an aerosol container, and attach the valve to the propellant (
An aerosol is obtained by filling 53.5 parts of liquefied petroleum gas under pressure.

Formulation example 5 Emulsion compound [195 parts, kerosene 89 parts, Tsurupol 3006K
3 parts of Tsurupol 3008K (all emulsifiers; trademarks of Toho Chemical Industries, Ltd.) are sequentially mixed and stirred to obtain an emulsion.

Formulation Example 6 Water-solvent compound [195 parts, 10 parts of polyoxyethylene alkylphenol derivative (surfactant), 5 parts of calcium dodecylbenzenesulfonate, and 80 parts of water are mixed and dissolved to obtain a water-solvent.

Formulation Example 7 A powder compound is obtained by dissolving 192 parts of a powder compound in 5 to 10 parts of acetone, adding 68 parts of clay and 30 parts of talc, stirring thoroughly, and then removing the acetone by evaporation.

Formulation example 8 Irrigation compound [1] 10 parts and 3 parts of Tsurupol 2495G (emulsifier; Toho Chemical Industry Co., Ltd. trade name) were mixed well, and 5 parts of white carbon, 300 mesh diatoms ± 5 parts, 300
Add 77 parts of Messy Orin and stir and mix to obtain an irrigation agent.

Formulation example 9 Granule compound [192 parts and 1 part of chlordane, 67 parts of clay,
Add 30 parts of bentonite and thoroughly stir and mix in a crusher.

Next, 15 parts of water is added to the mixture, mixed with stirring, granulated using a granulator, and dried through ventilation to obtain granules.

Formulation example 10 5 parts of ice pellet compound [1] and polybutene HV-300 (adhesive;
93 parts of pumice of 50 to 150 mesh is added to 2 parts (trade name) of Nisseki Jushi Kagaku Co., Ltd., mixed, stirred, and dried to obtain granules.

Example 1 Chlordane (1,2,4,5,6,7,8,8-octachlor-3a,4,7.7a-tetrahydro-4,7- Methanoindene) was diluted with kerosene and filtered on a 9 cm diameter filter paper (
A5, product of Toyo Oki Paper Co., Ltd.) was sprayed evenly at a rate of 50 ml per area, left for 2 hours, and then exposed to termites for 2 hours.
The mortality rate after 4 hours was examined and the results shown in the following table were obtained.

This shows that Compound (II) has significantly superior insecticidal efficacy compared to chlordane, a typical termite exterminator.

Example 2 Insecticidal efficacy test chemicals were applied as they were or diluted with water, and applied to the surface of a 9-diameter filter paper (jFy, 5A manufactured by Toyo Roshi Co., Ltd.) at a rate of 50% per
After leaving the termites for 2 hours, the termites are released, covered with a petri dish and left for 2 hours, and then transferred to a piece of paper soaked in fresh water to observe the mortality rate after 24 hours.

These results show that all of the present compositions have sufficient insecticidal efficacy against termites.

Example 3 Insecticidal efficacy The effect of topical application on flatulon beetle larvae was evaluated using a compound [
I] and fenitrothion (o, o-
Dimethyl-o-(3-methyl-4-*nitrophenyl)
Phosphorothioate) and chlordane were investigated.

The above three drugs were applied locally to the abdomen of the insect body along with 0.3μt of acetone to approximately 4cm/10 larvae of insect size, and 1,2.5
The writhing mortality ratio after 1 day was determined and abott correction was performed based on the writhing mortality rate of the acetone-treated area.

This result shows that compound [I] has extremely high efficacy against the larvae of the Japanese yellow beetle.

Example 4 Insecticidal efficacy on wood Water dilutions of the emulsion of Formulation Example 5 and the commercially available black ruden emulsion and fenitrothion emulsion as control agents were added to a lauan plate (1
150m1/rr on the surface of 0x 10x 3cm)? It was applied evenly with a pipette.

After air-drying, the larval beetles (approximately 4 mg/10 insects) were inoculated onto the treated board surface, and the writhing mortality rate was determined over time.
Abott correction was carried out based on the death rate of bittern insects in the untreated area.

These results show that compound [I] has extremely high efficacy against the Japanese yellow beetle, even in the relationship between the drug and the wood tissue.

Example 5 A water dilution of the emulsion of Formulation Example 5 (5% EC) and commercially available chlordane emulsion and fenitrothion emulsion as comparative drugs was added to lauan wood (20 cWl x 10 Crrl x 3 rust) with residual effect on wood.
It was applied uniformly to the surface at a ratio of 0 ml/77Z2, and after being air-dried, it was brought into contact with the Japanese yellow beetles and termites for a certain period of time, and the mortality rate after 24 hours was determined.

The contact time was 2 hours for the Japanese yellow beetle and 1 hour for the termites.

These results show that compound CI) has excellent residual efficacy, which is essential for wood preservation applications.

This means that although conventional organic phosphorus and pyrethroids have excellent insecticidal efficacy and safety, they have not been considered for wood applications at all, whereas Compound [I] compensates for these shortcomings and has extremely unique features. Indicates that it is a drug.

Example 6 Use in combination with preservatives A test is conducted in accordance with JIS A 9302 [Method for Preservative Efficacy of Wood Preservatives].

That is, after injecting the oil of Formulation Example 2 under reduced pressure into a test piece of cedar sapwood (2x2XICrn) (drug absorption rate 200%).
), the weathering operation was performed, the weight loss rate due to the test bacteria was measured, and the efficacy value was determined for each number of repeated strokes of the weathering operation.

The test bacterium used was Ophthalmia japonica, and the weathering operation was carried out in running water.
Drying at 60° C. for 23 hours was repeated 10 times, and the culture period was 90 days.

As a control, Formulation Example 2 except that Compound [1] was removed was used.

This result shows that there is no adverse effect on the preservative effect even when compound CI) is used in combination with a wood preservative, and compound [I] is even more excellent as a wood preservative.

Claims (1)

[Scope of Claims] 1. A wood preservation composition characterized by containing a compound represented by the structural formula as an active ingredient.