WO2004087819A1

WO2004087819A1 - Insect repellent coating

Info

Publication number: WO2004087819A1
Application number: PCT/JP2004/004721
Authority: WO
Inventors: Toshikazu Tomioka
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2003-03-31
Filing date: 2004-03-31
Publication date: 2004-10-14
Also published as: CN1697862A; KR20050112501A; TW200500009A; JPWO2004087819A1

Abstract

An insect repellent coating which contains at least one extract selected from the group consisting of a whole plant extract of a plant belonging to the family Pyrolaceae the genus Pylora, a whole plant extract of a plant belonging to the family Tropaaeolaceae the genus Tropaeolum, a foliage extract of a plant belonging to the family Myrtaceae, the genus Eucalyptus and a whole plant extract of a plant belonging to the family Primulaceae, the genus Lysimachia together with a solvent.

Description

Specification

Pest repellent paint Technical field

The present invention relates to a pest repellent paint. Specifically, the present invention relates to a pest repellent paint that prevents nesting of sanitary pests, house pests, and unpleasant pests that inhabit the living environment. Also, the present invention relates to a pest repellent paint that is effective for improving hygiene problems caused by pest nests, improving the livability of living environment, preventing deterioration of building materials, and preventing allergies of residents caused by dead pests. Background art

Pests such as cockroaches often nest in materials around them, such as equipment, furniture, and building materials used in the living environment, resulting in poor hygiene and discomfort. In addition, feces excreted by the pests will reduce hygiene and reduce the reliability of electrical circuits. In addition, dung can be a source of allergies and can compromise the health of residents, and there is a need for ways to cope with such damage.

Conventionally, synthetic chemicals similar to pesticides have been frequently used to repel pests such as cockroaches. For example, Japanese Patent Application Laid-Open No. 7-111812 discloses a method of repelling cockroaches using a paint to which a pyrethroid-based insecticide is added.

However, the pyrethroid insecticides disclosed in JP-A-7-111812 are harmful to the human body and pose a problem in terms of safety. In recent years, consumers' desire for natural products has demanded the use of materials that have been used in nature and that have been widely used since ancient times.o Disclosure of the Invention

An object of the present invention is to provide a pest repellent paint that is effective for sanitary pests and unpleasant pests that inhabit a large amount in the living environment and that has little effect on the human body, in other words, high safety.o The pest-repellent paint of the present invention is an extract of the plant belonging to the family Ichaxoviidae (Pyrolaceae), an extract of the plant belonging to the genus Ichaxoga, an extract of the plant belonging to the genus Nosenharen (Tropaaeolaceae), an extract of the plant belonging to the genus Nosenhalen, the extract of the plant belonging to the genus Eucalypt (Myrtaceae) and Contains at least one extract (hereinafter, also referred to as the present extract) selected from the group consisting of extracts of the whole plant of the genus Tranulaceae (Primulaceae) I do. In the pest repellent paint of the present invention, typically, the present extract is dispersed in a solvent.

Pyrrhiza rotundifolia (Pyrola rotundifolia) is a plant belonging to the family Roccidae and its name is derived from the name "Ichiyakuso", a well-known herbal medicine. It is also known as Winter green, a wild grass native to the United States, the United Kingdom, and the Pacific Ocean to the eastern Himalayas. It has been used since ancient times as a Chinese herbal medicine effective for contraception, beriberi, hemostatic action, diarrhea control, anti-inflammatory and anti-inflammatory (see, for example, JP-A-11-310534).

Nosenhallenaceae (Tropaeolum ma.ius) is a Chinese herbal medicine cultivated in various parts of China and has been used for ocular conjunctivitis. It is also known to grind and apply fresh ones for external use.

Eucalyptus globulus, a Chinese fir tree family plant, has been used as a topical agent for neuralgia and for the treatment of bronchitis by inhaling steam. Lysimachia sikokiana is a perennial plant that grows in various parts of Okinawa, and is used as a citrus fragrance by drying it and hanging it on the windowsill.

It is preferable to use those plants that have been sufficiently dried by sun drying or shade drying, but it is also possible to use those having a relatively high water content.

The solvent used for the extraction is a mixed solvent of water and an organic solvent, for example, a mixed solvent of water and acetone. The mixing weight ratio of water and the organic solvent is 5 to 95 parts by weight of water: 95 to 5 parts by weight of the organic solvent, preferably 15 to 85 parts by weight of water: 85 to 15 parts by weight of the organic solvent, More preferably, the amount is 25 to 75 parts by weight of water: 75 to 25 parts by weight of the organic solvent. The extraction method may be a commonly used method, for example, a method in which a raw material plant part is immersed in a mixed solvent for a long time, or a method in which the mixture is heated and stirred at a temperature not higher than the boiling point of the mixed solvent. To obtain an extract by filtration. It is desirable to concentrate the extract using an evaporator or spray-dry method to prepare an extract.

The pest repellent paint of the present invention is preferably an aqueous paint containing a paint resin.The paint resin is 1 part by weight or more and 30 parts by weight with respect to an extract of 70 parts by weight or more and 99 parts by weight or less. Hereinafter, it is preferable that the paint contains not less than 1 part by weight and not more than 20 parts by weight, preferably not less than 80 parts by weight and not more than 99 parts by weight of the extract.

The solvent contained in the insect repellent paint of the present invention preferably contains at least one solvent selected from the group consisting of water, methyl alcohol, ethyl alcohol, isopropyl alcohol and acetone.

The pest repellent paint of the present invention can be prepared by mixing a dispersion in which at least one extract selected from the extract group is dispersed, and a paint containing a paint resin. Alternatively, the pest repellent paint of the present invention may be prepared by dispersing at least one extract selected from the extract group in a paint containing a paint resin. Furthermore, the pest repellent paint of the present invention may be prepared by dissolving or dispersing at least one extract selected from the extract group in a solvent (a solvent containing no paint resin).

The solvent for dissolving or dispersing the extract is selected based on the solubility of the extract and the compatibility with the paint. Specifically, as a solvent for dissolving or dispersing the extract, one kind of solvent selected from the group consisting of water, methyl alcohol, ethyl alcohol, isopropyl alcohol and acetate, or a mixture of two or more kinds of solvents is used. Solvents can be suitably used. The solvent may contain other alcohols such as a polyhydric alcohol, if necessary.

The solvent for dissolving or dispersing the extract and the solvent contained in the paint are typically the same type of solvent, but both solvents may be different types of solvents. For example, the solvent for dispersing the extract may be water, and the solvent contained in the paint may be a mixed solvent of water and ethyl alcohol.

The insect repellent paint containing a plant extract also contains a plant extract other than the repellent active ingredient. Both the repellent active ingredient and other plant extracts are considered to have high microbial assimilation properties, so that there is a possibility that decay will progress. The decay of this extract not only reduces the repellent active ingredient, but also causes the products of And the contact area between the forefoot and the paint film surface is reduced, and the contact repellency of the extract is reduced. Furthermore, when it becomes decay and loses its repelling ability, it becomes a bait for pests and rather a source of pests.

Therefore, in order to prevent deterioration of the contact repellent performance due to putrefaction of the present extract, it is desirable that the pest repellent paint of the present invention contains a silver-based antibacterial agent and a natural or antibacterial agent. The silver-based antibacterial agent may include a carrier on which a silver complex or silver ion is supported. Examples of the carrier supporting the silver complex include silica gel (trade name: Amenitop, manufactured by Matsushita Electric Industrial Co., Ltd.) supporting a thiosulfato silver complex. Examples of the carrier supporting silver ions include zeolite supporting silver ions, phosphate supporting silver ions, and glass supporting silver ions. At least one extract from the above extract group may be adsorbed and supported on these carriers.

As a natural antibacterial agent, catechin, rust (Etrema. Iaponica) extract, Moso bamboo (Phyllostachys Albescens) extract, and the like can be used. Further, a synthetic product of an active ingredient contained in a natural antibacterial agent may be used. For example, a synthetic product of arylisothiocyanate contained in rust extract may be used.

The addition amount of the silver-based antibacterial agent or the natural antibacterial agent is preferably from 0.1 to 50 parts by weight based on 100 parts by weight of the total solids.

Furthermore, by using a synthetic antifungal agent for exhibiting antifungal performance, the antidegradability of the insect repellent paint against fungi can be improved.

The pest repellent paint of the present invention includes other repellents, potency enhancers, insect repellents, attractants, bactericides, deodorants, UV inhibitors (including UV absorbers and UV degradation inhibitors), antioxidants It may contain a stopping agent, a thickener, a stabilizer, a brightener, a pigment, a dye, a filler, and the like. In general, pests having sensory nerves such as cockroaches have a cuticle structure on the surfaces such as antennas and legs, and have different skin structures from humans. Placing a neurotransmitter which gives effective stimulation only to pests having sensory nerves such as cockroaches in the nesting area of pests or their invasion route can repel pests such as cockroaches. Neurotransmitters, unlike olfactory stimulants, do not need to increase the vapor pressure of the drug. Therefore, useless volatile evaporation of the chemicals used can be suppressed, and long-term continuous performance can be obtained. Also, if this repellent effect is repeated several times, the learning effect of pests such as cockroaches will increase. It can be expected to prevent nesting.

The pest repellent paint of the present invention is at least one of the extract group as a neurotransmitter drug.

Contains one extract. Therefore, the pest repellent paint of the present invention has pest repellent performance against pests having sensory nerves such as cockroaches, and can be used as pest repellent paints for cockroaches.

Examples of cockroaches include pests of the cockroach family (Periplaneta) and the cockroach family (Blattella) belonging to the order Coccinellida (Blattaria). For example, German cockroaches (Blattella germanica) and black cockroaches (Periplaneta f uliginosa) are mentioned. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a graph showing the evaluation results of a mixed solvent extract of Datura radix.

FIG. 2 is a graph showing the evaluation results of the water extract of Artichokes. FIG. 3 is a graph showing the evaluation results of the mixed solvent extract of Nosenhalen. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described. The active ingredient of the pest-repellent paint of the present invention is an extract of the whole plant of Pyrolaceae Pyrola rotundifolia L., an extract of the whole plant of the family Nosenharenaceae (Tropaaeolac eae Tro paeolum ma us L.). An extract of the leaves of the Eucalyptus globulus Labi 11. branch of the Chinese family Myrtaceae (Myrtaceae), and an extract of the whole plant of the plant Cypridaceae (Pri mulaceae) sorghum (Lysimachia sikokiana Mig.).

Ό o

The raw materials, Ichiyakuso (Naturaceae) and N. chinensis, do not grow in Japan. However, it is possible to use, for example, the whole plant of the genus Ixanthus and the genus Nosenharen from Yunnan Province, China. Ichaxoridae is a perennial evergreen herb with a height of 20-30 cm, with a flowering period of May-June and a fruiting period of 9-1. It is 0 month. It grows in the shade of trees under the forest. The above herbs are usually grown in Tibet, Yunnan and Guizhou. Excavate the whole plant with its roots, drop mud and dry it until the leaves shrink and become soft. When the leaves are purple and purple-brown on both sides when they are piled up and heated, dry them again. In the following embodiments, this raw material was used as the whole plant of the Korean artichoke.

In the case of Nosenhalen, the whole grass is also dug out with the roots, muddy sand is washed off, and the whole grass is exposed to the sun and dried. In the following embodiments, this raw material was used as the whole plant of the Nosenhalen plant.

The Chinese fir tree, Eucalyptus japonica, picks out the branches and leaves of the plant and shades it. In the following embodiments, this raw material was used as Eucalyptus branch and leaves.

In the early summer when round nuts ripen on the axils of plants, the sorghum Sorghum sorghum is collected from the root stock, steamed, and dried sufficiently in the shade. In the following embodiments, this raw material was used as whole plant of sorghum.

(Embodiment 1)

In the present embodiment, a case will be described in which a pest repellent paint is prepared using an extract of the whole plant of the genus Icaraxidae. First, the whole plant of the genus Icaraxidae was thoroughly dried and then subjected to extraction. The whole plant of Ichaxoridae was immersed in a mixed solvent of acetone and water (acetone: water = 70 parts by weight: 30 parts by weight) for 48 hours. The concentration of components soluble in a mixed solvent of acetone and water was concentrated using a single evaporator. The obtained extract is a black-brown high-viscosity viscous substance.

The extraction method may be a commonly used method, for example, a method in which a raw material plant part is immersed in a mixed solvent for a long time, an extraction is performed while heating and stirring at a temperature not higher than the boiling point of the mixed solvent, and the extract is filtered and extracted. There is a way to get. In the present embodiment, by performing extraction with a mixed solvent of acetone and water, an extract having high insect repellent performance can be obtained. As shown below, after the present extract is dispersed in a solvent, this dispersion is mixed with a solvent containing a paint resin to obtain a pest repellent paint. This paint was applied to the film surface, and the repellency of the paint film was evaluated. The evaluation test method is shown below, and the measurement results of the repellent performance against the coating concentration of this extract are shown. Evaluation test method:

1. 95 parts by weight of the present extract are dispersed in a solvent in advance. Next, the dispersion is mixed with a solvent containing 5 parts by weight of a paint resin in terms of dry solid content to prepare a pest repellent paint.

The solvent used here is a solvent that does not affect the properties of the coating resin. As the solvent, a single solvent selected from the group consisting of water, methyl alcohol, ethyl alcohol, isopropyl alcohol and acetone, or a mixed solvent obtained by combining a plurality of solvents is suitable. In the present embodiment, warm water of about 40 ° C. was used.

The coating resin is not particularly limited as long as it is a resin used in a general water-based coating. In this embodiment, a urethane-based paint resin is used. This urea-based paint resin was emulsified to prepare a urea-based paint resin (hereinafter also referred to as a water-soluble urea resin) dispersed in water. The water-soluble urethane resin paint was diluted with a paint solvent (water) so that it could be easily applied.

The paint prepared in 1 above was applied to a polyethylene terephthalate (PET) film surface of 2.10 cm square (100 cm ² ) and 125 m thick. As a coating method, a known method such as spray coating or screen printing may be used, but in the present embodiment, coating is performed by a roll coder method. After painting, the parts were dried in a dust-free place with sufficient ventilation until they were sufficiently dried. In the following, the coated PET film is also referred to as “the present extract”. In addition, a water-soluble urethane resin paint containing no present extract was prepared in the same manner as in 1 above. Hereinafter, a PET film coated with this paint in the same manner as above is also referred to as a “blank”. The weight of each sample before and after coating was measured to calculate the net weight of the coated product.

Near the four corners of the bottom of the plastic laboratory tank of 3 lm square, two pieces each of “the extract” and “factory blank” were placed facing each other. Near the center of the bottom of the tank, a shell evening for cockroaches and gauze filled with water were installed. In the vicinity of the center of each of the two pairs (four pieces), sugar cubes whose initial weight was measured were installed.

Into the above-mentioned experimental tank in which the atmosphere temperature was controlled to 4.27 ° C., a total of 100 adult male Chicopa cockroaches were released. After the start of the experiment, a total of 72 hours, which corresponds to the first statement of the experiment, the weight of sugar cubes was measured, and the sugar sugar intake (sugar sugar consumption) was calculated. 5. The repellent rate was calculated by the following formula.

Repellent rate (%) = (1-(average of sugar cube consumption on "this extract") / ("average of sugar cube consumption on blank j)) X 100

FIG. 1 is a graph showing the net weight of the present extract on the horizontal axis and the repellency of the above evaluation results on the vertical axis. As shown in FIG. 1, this extract shows pest repellent ability against Chinese cockroaches, which are abundant in the living environment, at a coating amount of lOOmg / sample or more. Further, the strength of the pest repelling performance is higher than a practical level. Since no dead individuals were found after the end of the pest repellent test, the safety of this extract was confirmed.

In the present embodiment, the case where water is used as the solvent for dispersing the extract has been described. However, a single solvent selected from the group consisting of water, methyl alcohol, ethyl alcohol, isopropyl alcohol, and acetone, or a mixed solvent obtained by combining a plurality of solvents can be suitably used. For example, even when a mixed solvent of 30 parts by weight of water and 70 parts by weight of ethyl alcohol was used for dispersing the extract, good dispersion and repelling performance could be confirmed.

In addition, when the pest repellent performance of other cockroach insects such as black cockroaches was evaluated for the sample with the above optimum concentration, it was demonstrated that it has practical repellent performance as in the case of the cockroach Was done.

(Comparative Example 1)

In order to compare the extraction method described in Embodiment 1 with a general water extraction method as an extraction method, cockroach repellent performance of each extract was compared. The evaluation results are described below. The plant described in the first embodiment was extracted by a water extraction method to obtain an aqueous extract of the whole plant of the plant of the family Ichaxonidae. The pest repellency of this water extract was evaluated. The evaluation method described in the first embodiment was used.

FIG. 2 is a graph showing the net weight of the water extract on the horizontal axis and the repellency of the above evaluation results on the vertical axis. As shown in FIG. 2, it was confirmed that the repellent performance of the water extract was present, but was poor. For example, it was confirmed that even with an application amount of 100 m or more samples, which was effective in the first embodiment, the insect pest repelling performance was not exhibited against the cockroach, which is frequently present in the living environment.

From the results shown in Figs. 1 and 2, the elution of the active ingredient was extremely small in the water extraction. On the other hand, a mixed solvent of water and an organic solvent is considered to elute a large amount of the active ingredient. This suggests that the extraction rate of the repellent active ingredient differs depending on the extraction method.

(Embodiment 2)

In the present embodiment, a case will be described in which a pest repellent paint is prepared by using an extract of the whole plant of the family Nostella sp. First, the whole plant of the Nosenharen plant was thoroughly dried and then subjected to extraction. The whole plant of the Nosenhalenidaceae family was immersed in a mixed solvent of acetone and water (acetone: water = 70 parts by weight: 30 parts by weight) for 48 hours. Using a spray-drying method, the concentration of components contained in the substance soluble in the mixed solvent of acetone and water was concentrated. The resulting extract is a dark brown high viscosity viscous substance.

The extraction method may be a commonly used method, for example, a method in which a raw material plant part is immersed in a mixed solvent for a long time, an extraction is performed while heating and stirring at a temperature not higher than the boiling point of the mixed solvent, and the extract is filtered and extracted. There is a way to get. In the present embodiment, an extract having high pest repellency can be obtained by performing extraction with a mixed solvent of acetone and water. In the same manner as in the evaluation test method described in Embodiment 1, a pest repellent paint was prepared, and the repellent performance of the present extract with respect to the coating concentration was measured. Figure 3 shows the results.

FIG. 3 is a graph showing the net weight of the extract on the horizontal axis and the repellency of the above evaluation results on the vertical axis. As shown in FIG. 3, this extract shows pest repellent ability against the German cockroach, which is abundant in the living environment, at a coating amount of 10 O mg / sample or more. Further, the strength of the pest repelling performance is higher than a practical level. The number of dead individuals after the end of the pest repellency test was 0, confirming the safety of this extract.

Furthermore, when the pest repellent performance of other cockroach insects, such as black cockroaches, was evaluated for the sample with the above optimum concentration, the actual It was demonstrated to have practical repelling performance.

(Comparative Example 2)

In order to compare the extraction method described in Embodiment 2 with a general water extraction method as an extraction method, cockroach repellent performance of each extract was compared. The evaluation results are described below. The plant described in the second embodiment was extracted by a water extraction method to obtain a water extract of the whole plant of Nosenhallenaceae. The pest repellency of this water extract was evaluated. The evaluation method described in the first embodiment was used.

As a result, it was confirmed that the water extract had almost no repelling performance. For example, it was confirmed that even the application amount of 10 O mgZ samples or more, which was effective in the second embodiment, did not exhibit pest repellent performance against Chinese cockroaches, which are often present in the living environment. From these results, it is considered that the active ingredient was hardly eluted by the water extraction, whereas the active ingredient was eluted effectively by the mixed solvent of water and the organic solvent. This suggests that the extraction rate of the repellent active ingredient differs depending on the extraction method.

(Embodiment 3)

In the present embodiment, a case will be described in which a pest repellent paint is prepared by using an extract of the branch and leaf of a plant belonging to the family Acacia catechu. The branches and leaves of the Eucalyptus linden plant were first thoroughly dried and then subjected to extraction. The branches and leaves of the Eucalyptus sylvestris plant were immersed in a mixed solvent of acetone and water (acetone: water = 70 parts by weight: 30 parts by weight) for 48 hours. Using a spray-drying method, the concentration of the components contained in the substance soluble in the mixed solvent of acetone and water was concentrated. The resulting extract is a dark brown high viscosity viscous substance.

In the same manner as in the evaluation test method shown in Embodiment 1, a pest repellent paint was prepared, and the repellent performance of the present extract with respect to the coating concentration was measured.

As a result, this extract exhibits pest repellent performance against the German cockroach, which is abundant in the living environment, at a coating amount of 10 O mg / sample or more. In addition, the strength of pest repellency is higher than the practical level. The number of dead individuals after the end of the pest repellency test was 0, confirming the safety of this extract.

In the present embodiment, the case where water is used as the solvent for dispersing the extract has been described. However, one or more solvents selected from the group consisting of water, methyl alcohol, ethyl alcohol, isopropyl alcohol, and acetone are used. The combined solvent can be suitably used. For example, even when a mixed solvent of 30 parts by weight of water and 70 parts by weight of ethyl alcohol was used for dispersing the extract, good dispersion and repelling performance could be confirmed.

In addition, the pest repellent performance of other cockroach insects, such as black cockroaches, was evaluated for the sample with the above optimum concentration, demonstrating that it has practical repellent performance, similar to the case of the German cockroach. Was done.

(Embodiment 4)

In the present embodiment, a case will be described in which an insect repellent paint is prepared using an extract of the whole plant of the sorghum sorghum sorghum. First, the whole plant of Prunus persicae was thoroughly dried and then subjected to extraction. The whole sorghum sorghum plant was immersed in a mixed solvent of acetone and water (ethyl alcohol: water = 70 parts by weight: 30 parts by weight) for 48 hours. Using a spray-drying method, the concentration of components contained in a substance soluble in a mixed solvent of ethyl alcohol and water was concentrated.

In the same manner as in the evaluation test method described in Embodiment 1, a pest repellent paint was prepared, and the repellent performance of the present extract with respect to the coating concentration was measured.

As a result, this extract shows pest repellent performance against the German cockroach, which is often present in the living environment, with a coating amount of 10 O mgZ or more samples. In addition, the strength of pest repellency is higher than the practical level. The number of dead individuals after the end of the insect repellent test was ◦, confirming the safety of this extract.

Furthermore, the pest repellent performance of the sample with the above optimum concentration against other cockroaches such as black cockroaches was evaluated. Proven.

(Embodiment 5) In the present embodiment, a pest repellent paint containing a natural antibacterial agent will be described. The pest repellent paint of the present embodiment is different from the pest repellent paint of Embodiment 1 in that it contains catechin as a natural antibacterial agent. More specifically, the pest repellent paint of the present embodiment is composed of 94 parts of an extract of the whole plant of the genus Icaraxidae, which is obtained in the same manner as in the first embodiment, and catechin (Mitsui Norin) as a tea extract. This is a water-based paint containing 1 part of a water-soluble urethane resin and 5 parts in terms of dry solid content in terms of dry solid content. The extract and catechin were dispersed in water, the solvent of the paint. The mixing ratio of water was adjusted so that the viscosity of the coating state became the best. In the same manner as in Embodiment 1, the prepared pest repellent paint was applied on a PET film, and the repellency of this film was evaluated using insects (cockroaches).

As a result, a coating film having good initial coating film performance and good repelling performance was obtained. This coating film was left for half a year in a 37 ° C environment space where microorganisms could easily proliferate. As a result of observing the performance of the coating film after standing, no microbial contamination and so-called decay were observed as compared with the pest repellent paint to which no antibacterial component was added. That is, microbial contamination of the repellent coating film could be prevented.

The following can be considered as a reason for this. The pest repellent paint containing a plant extract also contains a plant extract other than the repellent active ingredient. Both the repellent active ingredient and other plant extracts are considered to have high microbial assimilation properties, so that there is a possibility that decay will progress. The decay of this extract not only reduces the repellent active ingredients, but also reduces the contact area between the antennae of the pest and the front leg and the coating surface by the product of the decay covering the coating surface. Therefore, the contact repelling performance of the present extract is reduced. Furthermore, when it becomes a rot and loses its repelling ability, it becomes a bait for pests and rather a source of pests.

According to the present embodiment, the present extract and other plant extracts can be prevented from being deteriorated by spoilage. Therefore, maintenance of the repelling performance can be ensured. Natural antibacterial agents are not limited to the above catechins, and similar effects can be obtained with rust extract and Moso bamboo extract. It goes without saying that the same effect can be obtained by using a synthetic product of an active ingredient contained in a natural antibacterial agent such as arylisothiocyanate instead of the natural antibacterial agent. Furthermore, by using a synthetic antifungal agent for exhibiting antifungal performance, the antidegradability of the insect repellent paint against fungi can be improved.

(Embodiment 6)

In the present embodiment, a pest repellent paint containing a silver-based antibacterial agent will be described. The pest repellent paint of the present embodiment is different from the pest repellent paint of Embodiment 1 in that it contains a silver complex antibacterial agent as a silver antibacterial agent. A specific preparation method will be described. 1 part by weight of a silver complex antibacterial agent (trade name: Amenitop, manufactured by Matsushita Electric Industrial Co., Ltd.) having a thiosulfate silver complex adsorbed and supported on a silica gel and the surface thereof coated with a tetraethoxysilane hydrolyzate; 1 part by weight of the extract of the plant of the family Icaraxidae was also dispersed in 20 parts by weight of water as a solvent, and the water was dried with stirring. As a result, pest repellent particles having the extract fixed to the surface of the silver complex antibacterial agent were prepared. Two parts by weight of the water-based paint resin were previously dispersed in a water solvent to such an extent that the coating performance was obtained. Into this coating resin, 98 parts by weight of the above-mentioned pest repellent particles were dispersed to prepare a pest repellent paint, and the pest repellent paint was applied on a PET film in the same manner as in Embodiment 5 to avoid repellency. The performance and antimicrobial degradability were evaluated. As a result, practical repellent performance and antimicrobial degradability were confirmed.

(Embodiment 7)

In the present embodiment, a case will be described in which a pest repellent spray liquid is prepared by using an extract of the whole plant of the genus Ichaxoridae. The extract is prepared by the same method as that disclosed in the first embodiment. Specifically, the whole plant of the genus Ichaxoridae was first thoroughly dried and then subjected to extraction. The whole plant of the genus Icaraxidae was immersed in a mixed solvent of acetone and water (acetone: 70 parts by weight of water: 30 parts by weight) for 48 hours. The concentration of the components soluble in the mixed solvent of acetone and water was concentrated using an evaporator. The extract obtained is a black-brown high-viscosity viscous substance.

After dispersing the extract in a solvent, if necessary, a dispersing aid such as a surfactant and an additive such as alcohol are mixed with the dispersion to obtain a pest repellent spray liquid. Alcohols are alcohols that can be used to dissolve or disperse the extract. Those having a boiling point different from that of coal (methyl alcohol, ethyl alcohol, isopropyl alcohol) are preferred. For example, polyhydric alcohols such as ethylene glycol, propylene glycol, butylene glycol, and sugar alcohol can be used. Since polyhydric alcohol has a surface active effect, the use of polyhydric alcohol as an additive makes it possible to adjust and optimize fog particles. That is, a polyhydric alcohol can be used as a dispersing aid.

This spray liquid was sprayed on the film surface, and the repellency of the coating film was evaluated. The evaluation method used was a method based on the evaluation method described in the first embodiment.

Evaluation test method:

1. Prepare this pest repellent spray liquid by the above method. The solvent used here is a solvent that does not affect the spray workability of the spray liquid. As the solvent, a single solvent selected from the group consisting of water, methyl alcohol, ethyl alcohol, isopropyl alcohol, and acetone, or a mixed solvent obtained by combining a plurality of solvents is suitable. In the present embodiment, a mixed solvent of ethyl alcohol and water was used. The compounding amount of the spray liquid is: this extract: ethyl alcohol: water: polyhydric alcohol = 10 parts by weight: 60 parts by weight: 10 parts by weight: 10 parts by weight. In addition, propylene glycol was used as the polyhydric alcohol.

The spray liquid prepared in 1 above was applied to a PET film surface of 2.10 cm square (100 cm ² ) and 125 m thick. After painting, dry it in a dust-free place with sufficient ventilation until it dries sufficiently. In the following, the coated PET film is also referred to as “the present extract”. Further, a spray solution containing no present extract was prepared in the same manner as in 1 above. Hereinafter, the PET film coated with the spray liquid in the same manner as above is also referred to as “plank”. The weight of each sample before and after coating was measured to calculate the net weight of the coated product.

Near the four corners of the bottom of the plastic laboratory tank of 3. 1 m square, two pieces each of “the present extract” and “blank” were placed facing each other. Near the center of the bottom of the tank, a shell evening for cockroaches and gauze filled with water were installed. In the vicinity of the center of each of the two pairs (four pieces), sugar cubes whose initial weight was measured were installed.

4.2 A total of 100 males and 50 females were placed in the above-mentioned experimental tank controlled at 27 ° C. The adult cockroach was released. A total of 72 hours after the start of the experiment, a total of 72 hours, the weight of lump sugar was measured, and the lactose sugar intake (lactose sugar consumption) was calculated.

5. The repellent rate was calculated by the following formula.

Repellent rate (%) = (1— (Average amount of sugar consumed on the “extract”) / (Average amount of sugar consumed on the “blank”)) X 100

The results of the repellent performance evaluation test showed practical repellent performance, as in the first embodiment. Since no dead individuals were found after the end of the pest repellent test, the safety of this extract was confirmed.

In the present embodiment, the case where a mixed solvent of ethyl alcohol and water is used as a solvent for dispersing the extract has been described. However, a single solvent selected from the group consisting of water, methyl alcohol, ethyl alcohol, isopropyl alcohol, and acetone, or a mixed solvent obtained by combining a plurality of solvents can be suitably used. For example, even when a mixed solvent of 30 parts by weight of water and 70 parts by weight of isopropyl alcohol was used for dispersing the extract, good dispersion and repelling performance could be confirmed.

In the present embodiment, propylene glycol is added as a polyhydric alcohol for preparing a spray liquid, but other polyhydric alcohols such as ethylene glycol, butylene glycol, and sugar alcohol may be used. Also, other dispersion aids and additives may be added to adjust the spray one-liquid condition.

From the above embodiments, an extract of the whole plant of the genus Iroxaceae (Pyrolaceae), an extract of the whole plant of the genus Norophyllidae (Tropaaeolaceae), an extract of the whole plant of the genus Norophyllum, the extract of the branch of the genus Eucalyptus (Myrtaceae) and the extract of Sakuraso Pest repellent paint containing at least one extract selected from the group consisting of extracts of the whole plant of the genus Tranoaceae, and a solvent, and a cockroach such as a cockroach, It has been demonstrated that it has pest repellent performance against insects, including insects.

Insects used in the experiment show signs of subsequent death for reasons other than life expectancy I can't. This suggests that the pest repellent mechanism is different from the repellent by feeding, which is common in conventional repellents. Specifically, it is thought that this is due to stimulation of the neurotransmitter system by contacting the antennae or the forelimb with the drug, ie, contact repellency. In addition, it can be considered that the movement of the test insects during the test period has created a situation in which it is difficult for them to penetrate into the painted area of the extract with the learning effect of the insects.

In the present invention, a mixed solvent of an organic solvent and water is used for the extraction of the whole plant of the genus Icaraxaceae, the whole plant of the genus Icaraxiflora, the whole plant of the genus Nosenhalenaceae, the whole plant of the genus Nocturne oleracea, the branch of the plant of the family Myrtaceae, the branch of the plant of the genus Eucalyptus. . It is thought that by drying the plant extraction site prior to solvent extraction and by using a mixed solvent as the extraction solvent, the active ingredients in the plant related to pest repellency can be efficiently extracted ^) o

Extracts of the whole plant of the plant, the plant of the genus Icaraxaceae, the whole plant of the plant of the genus Norienidae, the branch of the plant of the genus Aurelia, and the extract of the whole plant of the primrose sorghum are strong against cockroaches that live in large numbers in the living environment Exhibits pest repellency. These plants have been used as a herbal medicine to ensure the safety of leaving them in the living environment without affecting human health. In addition, these plants are used in a different way from their use as medicines, in other words, as herbal medicines that are used only in critical and emergency situations. That is, the repellent components obtained from these plants are used as chemical substances that are resident in the living environment without taking them.

Further, by suppressing the nesting of the pests, the wandering of the pests can be prevented. Therefore, the present invention exerts effects such as prevention of corrosion due to pest excreta, spread of microorganisms caused by wandering of pests, or prevention of allergy associated with scattering of dust or mold, and has a large industrial effect.

ADVANTAGE OF THE INVENTION According to this invention, the pest repellent paint which is effective for the sanitary pests and unpleasant pests which inhabit in a living environment and which has little influence on the human body, in other words, high safety is provided.

Although the embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above embodiments. The above embodiments are examples, and their respective components It will be understood by those skilled in the art that various modifications can be made, and that such modifications also fall within the technical scope of the present invention.

The contents disclosed in the description, drawings and claims of Japanese Patent Application No. 2003-96723 filed on Mar. 31, 2003 are hereby incorporated by reference in their entirety. Industrial applicability

The pest repellent paint of the present invention is used for sinks, wash basins, electrical equipment, building materials, home gardening materials, office equipment, interior materials, exterior materials, vending machines, automobile parts, traffic-related equipment, furniture, cooking equipment, medical care It can be used for welfare facilities.

Claims

The scope of the claims

1. It consists of an extract of the whole plant of the genus Ichaxoidae, an extract of the whole plant of the genus Nosenharenaceae, an extract of the whole plant of the Eucalyptus genus of the family Myrtaceae, and an extract of the whole plant of the genus Tranoaceae, a plant belonging to the genus Sacramento. A pest repellent paint containing at least one extract selected from the group and a solvent.

2. The pest repellent paint according to claim 1, which has pest repellent performance against cockroaches.

3. The insect repellent paint according to claim 1, wherein the solvent contains at least one solvent selected from the group consisting of water, methyl alcohol, ethyl alcohol, isopropyl alcohol, and acetone.

4. The insect repellent paint according to claim 1, further comprising a silver antibacterial agent and / or a natural antibacterial agent.

5. The insect repellent paint according to claim 4, wherein the silver-based antibacterial agent includes a carrier supporting a silver complex or silver ion.