JPH11217310A - Preservative for timber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a preservative which has an activity, e.g. ingestion inhibitory effect, repelling and inhibitory effect or insecticidal effect, against insect pests of timbers and shows antimicrobial, fungicidal or antiseptic effect by making the reservative include a component selected from among a hiba neutral oil, a hinoki oil and a p-oxybenzoic ester as an active ingredient. SOLUTION: This preservative is obtained by including at least one kind among (A) a hiba neutral oil (a residue freed of acidic oils from a hiba oil), (B) a hinoki oil (e.g. an oil obtained by steam distillation of sawdust of hinoki scrap woods or the like) and (C) a p-oxybenzoic ester (e.g. n-propyl p- oxybenzoate or the like) as active ingredients. It is favorable that the above preservative contains the components A, B and C in amounts of 0.01-90 wt.%, respectively. Further, when (D) boric acid and/or boron in addition to the above components are added in amounts of 0.01-90 wt.%, respectively, the activity, e.g. ingestion inhibitory effect or the like against insect pests of timbers, is more increased and antimicrobial fungicidal effect or the like can also be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a wood preservative,
More specifically, it has activities such as feeding inhibition, repellent, insecticidal activity against termites and fly bark beetles that erode buildings and furniture etc. where wood was used. The present invention relates to a wood preservative having an antibacterial, antifungal and antiseptic action for protecting the wood.

[0002]

BACKGROUND OF THE INVENTION As a controlling agent for wood pests such as termites and leaf bark beetles, organic phosphorus compounds such as phoxime and chlorpyrifos are used as general insecticides. Insecticides, carbamate insecticides such as propoxer and bassa, and pyrethroid insecticides such as arethrin and permethrin.

Although most of the above compounds have relatively low toxicity, some organophosphorus and carbamate insecticides have a cholinesterase activity inhibitory effect on the human body, and pyrethroid insecticides have high fish toxicity. There are many things and it is hard to say that it is safe enough from the viewpoint of environmental pollution. Some of these compounds are commercially available by blending octachlorodipropyl ether (hereinafter referred to as S-421) as a synergist because of problems such as sustained efficacy and price-performance ratio. Many. Although this S-421 is an excellent synergist, some have questioned its use as a chlorine-based agent from the viewpoint of environmental pollution.

[0004] Therefore, recently, there has been a demand for a pest control agent and an antibacterial, fungicide, and preservative which are safer for humans and more environmentally friendly, and hiba oil satisfies the above-mentioned required properties. It is attracting attention as one of the things (Mystery of Hiba Aomori, Hiba Aomori Kenkyukai Publishing,
Edited by Toshihiro Okabe et al. (1990), pp. 132-14
3).

Hiba oil is separated into an acidic oil and a neutral oil, and the acidic oil contains hinokitiol, and the neutral oil does not contain hinokitiol. As described in the above literature, hinokitiol is considered as an active substance of various effects of hiba oil, such as fungicidal, antiseptic and insecticidal effects. Therefore, neutral oils containing no hinoxythiol have been considered to have no industrial use, especially for such uses. Hinoki thiol is not contained in hinoki oil extracted from domestic hinoki cypress, and its use as a fittin chit or a fragrance is being studied.

[0006] Paraoxybenzoic acid esters have been conventionally used as preservatives for foods, medicines or cosmetics. However, they have an antifeeding effect against wood pests, a repellent effect, and an antibacterial, antifungal and antiseptic effect on wood. Neither boric acid nor boron was known for their insect pest control, antibacterial, antifungal and antiseptic effects on wood.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has an antibacterial and antibacterial activity, which has an activity of inhibiting the feeding, repelling, and insecticidal effects on wood pests, and protects wood from fungi and fungi. It is an object of the present invention to provide a wood preservative which has a mold, a preservative action, is extremely safe for humans and animals, and is more environmentally friendly.

[0008]

To achieve the above object, the wood preservative (1) according to the present invention comprises at least one kind selected from the group consisting of Hiba neutral oil, Hinoki oil and p-hydroxybenzoate. As an active ingredient.

The above-mentioned wood preservative (1) contains at least one of Hiba neutral oil, hinoki oil and p-hydroxybenzoic acid ester as an active ingredient. It has inhibitory and repellent activities, and also has antibacterial, antifungal and antiseptic effects to protect wood from fungi and fungi. Hiba neutral oil and Hinoki oil alone have a strong insecticidal action against wood pests, and these Hiba neutral oil, Hinoki oil,
And by using a combination of para-hydroxybenzoic acid ester, even better antibacterial, fungicide, antiseptic action,
It can exert an antifeeding action, a repellent action, an insecticidal action, etc., and all these substances have low toxicity to the human body and are environmentally friendly.

Hiba neutral oil is a residue obtained by removing acidic oil from Hiba oil. Hinoki oil is an oil obtained by, for example, distilling and extracting steamed sawdust of hinoki cypress waste wood with steam. Until now, it was considered that there is no particular use, but according to the present study by the present inventors, Hiba neutral oil and Hinoki oil are antibacterial, fungicide,
It has been demonstrated for the first time that it has an antiseptic effect and an insecticidal effect equivalent to that of hiba oil.

Paraoxybenzoic acid esters have been used as preservatives for foods, medicines or cosmetics. However, they have an antifeeding effect against wood pests, a repellent effect, and an antibacterial, antifungal and antiseptic effect on wood. In this book, it is not known that, besides Hiba neutral oil and hinoki oil, paraoxybenzoic acid ester also has an antifeeding effect, a repellent effect, and an antibacterial, fungicidal and antiseptic effect on wood pests. It was first clarified by the inventors' research.

Further, the wood preservative (2) according to the present invention comprises:
The above wood preservative (1) is characterized by containing boric acid and / or boron as an active ingredient. When boric acid and / or boron is contained in the wood preservative (1), activities such as an antifeeding action, a repellent action, an insecticidal action and the like against wood pests can be further enhanced, or wood can be obtained from fungi and molds. Protect antibacterial, antifungal, antiseptic action can be further enhanced.

Further, the wood preservative (3) according to the present invention comprises:
The wood preservative (1) or (2) is characterized in that termites are used as target wood pests. The above-mentioned Hiba neutral oil, hinoki oil, paraoxybenzoate, boric acid and boron have particularly excellent activities against termites such as repellent action.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The hiba neutral oil according to the present invention is a residue obtained by extracting and removing acidic oil from hiba oil. The preferred content of the Hiba neutral oil in the drug is 0.01 to 90 wt.
% Range. The hinoki oil according to the present invention is, for example, oil obtained by distilling and extracting sawdust of cypress waste material with steam. The preferred content of the hinoki oil in the drug is,
It is in the range of 0.01 to 90 wt%.

Examples of the paraoxybenzoate according to the present invention include n-propyl paraoxybenzoate, n-butyl paraoxybenzoate, ethyl paraoxybenzoate and i-propyl paraoxybenzoate. The preferred content of the paraoxybenzoate in the drug is 0.01 to 90 wt%, more preferably 0.1 to 90 wt%.
It is in the range of 1 to 10 wt%.

The boric acid according to the present invention includes metaboric acid, orthoboric acid, tetraboric acid and the like.
The preferred content of the boric acid in the drug is 0.01 to 9
The range is 0 wt%. Boron according to the present invention may be in the form of borax, sodium octaborate tetrahydrate, sodium borofluoride, or an organic boron compound (Hyboron ES-8).
300 (trade name) Asahi Shokai System Giken Service) can be added. The preferred content of boron in the drug is in the range of 0.01 to 90 wt%.

The form of the preparation is not particularly limited as long as it contains the components of the wood preservative according to the present invention.
Examples of the form include liquids such as solutions, wettable powders, suspensions, dispersants, emulsions, oils, and lotions; pastes,
Semi-solid preparations such as creams; various forms of granules, microcapsules, sprays, aerosols and the like. These forms may be appropriately selected according to the purpose of use and the application site. In addition, these preparations can be manufactured by a known method.

In addition, as long as the effect and safety of the active ingredient of the wood preservative of the present invention are not impaired, the wood preservative of the present invention may be an insect repellent,
It may contain a preservative, a fungicide, a resin, a solvent, and other additives (for example, a stabilizer such as an antioxidant or an ultraviolet absorber, an emulsifier, a colorant, a pigment, and the like).

Examples of the insect repellent include organophosphorus insecticides such as phoxime, chlorpyrifos, fenitrothion, pyridafenthion, and isofenphos; pyrethroid insecticides such as cyfluthrin, permethrin, tralomethrin, fenvalerate, etofenprox, and Hoe-498; Nitroguanidine-based insecticides such as imidacloprid; nitromethylene-based insecticides; phenylpyrazole-based insecticides such as fipronil; pest repellents such as dibutyl succinate and diethyltoluamide; and potency enhancers such as S-421. Can be mentioned.

Examples of the antiseptic / fungicide include 3-bromo-2,3-diiodo-2-propenylethyl carbonate,
Organic iodine preservatives such as 3-iodo-2-propynylbutyl carbamate, 2,3,3-triiodoallyl alcohol, parachlorophenyl-3-iodopropargyl formal,
Benzimidazole and benzothiazole preservatives such as 2- (4-thiazolyl) benzimidazole and 2-thiocyanomethylthiobenzothiazole, 1- (2- (2 ', 4'-dichlorophenyl) -1,3-dioxolan-2 -Yl-methyl) -1H-1,2,
4-triazole, 1- (2- (2 ', 4'-dichlorophenyl) -4-
Propyl-1,3-dioxolan-2-yl-methyl) -1H-1,
Triazole preservatives such as 2,4-triazole, α- (2- (4-chlorophenyl) -ethyl) -α- (1,1-dimethylethyl) -1H-1,2,4-triazole-1-ethanol And the like.

As the resin, for example, alkyd resin,
An acrylic resin, a fluorine resin, a silicon resin, and the like can be given. Examples of the solvent include Exxon Naphtha No. 7, Exxon naphtha No. 6. Exor D80
Aliphatic organic solvents such as (exxon Chemical Co., Ltd.), Solvesso 150, Solvesso 200 (exxon Chemical Co., Ltd.), Nisseki Hisol SAS 296,
Nisseki Hisol SAS-LH, Alken L (Nippon Petrochemical Co., Ltd.), PAD (Nikko Sekiyu KK), aromatic organic solvents such as dibutyl phthalate, dioctyl phthalate, diallyl phthalate, etc. Can be mentioned.

The wood pests to which the wood preservative according to the present invention is used include, for example, termites, carnivores,
Insects belonging to the order Bee can be mentioned. Specific examples of the insects belonging to the order Termite include those belonging to the family Termite, such as Yamato termite and House termite, and those belonging to the Levitermite, such as the termite termite.

Specific examples of the insects belonging to the order Coleoptera include those belonging to the family of the leaf beetle family, such as the fly bark beetle, the oak fly bark beetle, the zelkova fly bark beetle, and the alage fly bark beetle; Belonging beetles, those belonging to the family Coleoptera, such as Coleoptera crispinae; Examples include those belonging to the family Weevil and those belonging to the bark beetle family, such as the bark beetle. Other examples include those belonging to the caterpillar family and the weevil family.

Specific examples of the insects belonging to the order of the wasps may include those belonging to the family Bee-bees, such as wasps, and those belonging to the ant-family such as the red-tailed ant. The wood pest control according to the present invention exerts an excellent control effect on termites among these insects.

Examples of fungi to be used for the wood preservative according to the present invention include basidiomycetes. Specific examples of the fungi belonging to the basidiomycetes include Kawatake mushroom, Kikaigaratake mushroom, Chilimendake mushroom, Matsuogi mushroom, Namidatake mushroom, and Japanese quail mushroom.

The fungi to be used for the wood preservative according to the present invention include, for example, zygomycetes, ascomycetes, incomplete fungi and the like. Specific examples of the molds belonging to the zygomycetes include blackflies and fungi. Specific examples of the molds belonging to the ascomycetes include ketomium and pine wood mold. Specific examples of the molds belonging to the imperfect fungi include a fungus, a fungus,
Aspergillus and blue mold can be mentioned.

Next, a method for controlling pests and fungi using the wood preservative according to the present invention will be described. As described above, the wood preservative according to the present invention can be used in various forms. However, these various forms of wood preservative can be used as sources or sources of pests, such as kitchens, bathrooms, living rooms, and floors. Corners, under floors, ceilings, pillars, walls, foundation concrete,
What is necessary is just to make it exist in soil etc. only in the quantity which can show the effect sufficiently.

As the method, there are various methods according to the invasion source and the generation source of the wood pest, for example, application, spraying, dipping,
Injection, mixing, spraying and the like can be mentioned. When the above-mentioned wood preservative is present in the soil, a method such as spraying on the soil surface, spraying on grooves formed in the soil, and mixing with the soil can be adopted.

Further, as described above, in addition to spraying on a specific place, for example, coating, dipping, kneading, etc., on a sheet-like base material such as a synthetic resin sheet, paper, cloth, etc. The pests can also be effectively controlled by attaching or attaching a preservative, and installing or attaching the sheet to which the wood preservative has adhered to the invasion or occurrence of the wood pest.

When a wood preservative is used by the above-described method, a large repellent effect against the above-mentioned wood pest is recognized, or the wood pest is immobilized when it is active in the vicinity of the wood preservative for a certain time or more. They disappear or die. In particular, the effect on termites is remarkable.

As described above, the wood preservative according to the present invention has activities such as an antifeeding action, a repellent action and an insecticidal action against wood pests such as termites and bark beetles.

The wood preservative according to the present invention can protect wood from fungi and fungi, and has antibacterial, antifungal,
Has antiseptic action.

[0033]

Examples and Comparative Examples Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples. Further, as a comparative example, a sample solution containing hinokitiol and hiba oil was prepared, and the same test as in the example was performed.

Preparation of Sample Solution (Examples and Comparative Examples) Hiba neutral oil and hinoki oil were added as wood preservatives according to the examples so as to be 10% by weight with respect to n-hexane to obtain a sample solution. Was. In the examples containing paraoxybenzoic acid ester, boric acid and borax shown in Table 2 below, ethanol was used as a solvent, and was added so as to be 10% by weight with respect to ethanol to prepare a sample solution. I got Further, a sample solution containing hinokitiol and hiba oil according to the comparative example was added and prepared so as to be 10% by weight based on n-hexane as in the case of the example.

Test Example 1 Quartz sand passed through a 20-mesh sieve was dried at a temperature of 60 ± 2 ° C. to a constant weight, and then cooled to obtain a quartz sand for a test. Next, the sample solution was uniformly adhered to 12 g of the quartz sand so that the amount of each sample was 1% by weight based on the quartz sand, and the solvent (n-hexane) was scattered. Further, moisture was attached to these quartz sands so that the water content of the dried quartz sands became 10% by weight. As a comparative example, quartz sand to which water was attached in the same manner as described above without treatment with a chemical was also prepared.

Next, two bottomed cylindrical glass containers (inner diameter 5 cm, height about 12 cm) having a sliding portion for connecting glass tubes at a position 2 cm from the open end are prepared. A glass tube (inner diameter 1.5 cm, length about 10 cm) capable of connecting and communicating two glass containers was prepared. The glass container and the glass tube used were those that had been dried and sterilized in advance. Next, one glass container was filled with about 60 g of quartz sand for a test to which no chemicals or the like had adhered, and the other glass container was filled with about 3 pieces of pine shards as bait.
g. Further, the central portion of the glass tube is filled with quartz sand treated with the sample solutions according to the above-described Examples and Comparative Examples or the quartz sand untreated with a chemical, and the two glass containers are connected by the glass tube. did. Then, 200 ants of termites (Coptotermes formosanus) collected from the nest and 200 soldiers on the quartz sand in one of the glass containers filled with the quartz sand for the test to which no chemicals or the like are attached.
No test head was placed and the test equipment was set to a temperature of 28
% For 3 weeks.

After a lapse of 3 weeks, the termites contained in the glass container filled with the quartz sand for the test pass through the glass tube and move toward the glass container filled with other pine shards. It was observed whether or not. This test was repeated three times for each sample.

As a result, in tests using quartz sand treated with the sample solutions according to the examples and comparative examples, no migration of termites was observed at all. On the other hand, in the case of the quartz tube filled with untreated quartz sand according to the comparative example, the termites moved in the glass tube and reached the glass container filled with the pine shards. As described above, the quartz sand to which the sample solutions according to the examples and the comparative examples were attached had a strong repellent effect on house termites.

Test Example 2 Next, as another test example, quartz sand treated in the same manner as in Test Example 1 and untreated quartz sand were spread on petri dishes (6 cm in diameter) which had been dried and sterilized in advance. Was. Next, ten house termite ants collected from the nest were randomly placed on the quartz sand. Next, each petri dish was placed in a container filled with water, and the containers were allowed to stand in a constant temperature room at a temperature of 28 ± 2 ° C. for 7 days. After 4 hours, 1 day, and 7 days, the health status of the termites was determined. Observed. The results are shown in Tables 1 and 2 below.

[0040]

[Table 1]

[0041]

[Table 2]

As is clear from the results shown in Tables 1 and 2, the sample solutions according to Examples 1 to 10 and 12 (at least one of Hiba neutral oil, hinoki oil, and boric acid as an active ingredient) In the case of using quartz sand treated with the above-described solution, all the termites have died after 7 days, and at least one of the above-mentioned neutralized Hiba oil, hinoki oil and boric acid has been removed. It was demonstrated that the sample solution contained as an active ingredient has an effect of killing house termites or inhibiting normal activities, as well as a repellent effect.

On the other hand, even when quartz sand treated with the sample solution (solution containing Hiba oil) according to Comparative Example 2 was used, all the termites died one day later, and the Comparative Example containing Hiba oil was used. It was confirmed that the sample solution according to No. 2 also had an effect as a controlling agent. When quartz sand treated with the sample solution according to Comparative Example 1 (a solution containing hinokitiol) was used, all the termites survived one day later, but four animals died seven days later. , Three animals were overturned, and it was confirmed that the sample solution according to Comparative Example 1 containing hinokitiol was also effective to some extent as a controlling agent.

When the quartz sand treated with the sample solutions according to Examples 11 and 13 to 15 containing neither Hiba neutral oil, Hinoki oil nor boric acid was used, the above Test Example 1 was used. Although a stronger repellent effect was recognized, it was confirmed that the effect as a controlling agent in this Test Example 2 was weak. When the untreated quartz sand according to Comparative Example 3 was used, all the termites remained healthy even after 7 days.

Test Example 3 An antiseptic effect test was carried out based on the Japan Wood Preservation Association Standard No. 1, revised 1989, and the test results were expressed as the weight loss rate of the treated test specimens due to the antibacterial operation. Japanese quail mushroom and Kawaratake mushroom were used as test bacteria, and the weathering operation was performed 5 times. The results are shown in Table 3 below.

[0046]

[Table 3]

The samples treated with a sample solution containing at least one of the active ingredients of Hiba neutral oil, hinoki oil, p-hydroxybenzoate, boric acid and boron according to the examples are all preservatives. Although the effect could be confirmed, in the case of the sample solution untreated, the weight reduction rate was large, and the antiseptic effect could not be confirmed.

Claims (3)

[Claims] 1. A wood preservative containing at least one of Hiba neutral oil, hinoki oil and paraoxybenzoate as an active ingredient. 2. The wood preservative according to claim 1, comprising boric acid and / or boron as an active ingredient. 3. The termite pest as a target wood pest.
Or the wood preservative according to claim 2.