JP5238965B2 - Pest repellent composition and pest repellent member containing the same - Google Patents

Description

  The present invention relates to a pest repellent composition that contains a pest repellent having an effect of repelling pests (hereinafter referred to as “pest repellent effect”) and can release a pest repellent component, and a pest repellent member containing the same.

  Conventionally, for example, insects such as cockroaches, ants, spiders, and centipedes, and small animals such as mice (hereinafter, such insects and small animals are collectively referred to as “pests”) such as buildings and various devices. Insect repellent members that prevent entry into various objects have been introduced. As such a pest repellent member, for example, it is composed of a resin containing a pest repellent component and is attached to an object to be protected from the pest, whereby the effect of the pest repellent component gradually released from the pest repellent member Protecting the object from pests has been introduced. (For example, refer to Patent Document 1).

  Examples of the pest repellent composition used in such a pest repellent member include, for example, (A) at least one resin selected from polyamide resins and polyacetal resins, (B) sulfonamide derivatives, sulfonic acid ester derivatives, phosphoric acid A resin composition containing at least one compound selected from an ester derivative, a phosphazene derivative, a carboxylic acid amide derivative, and a carboxylic acid ester derivative, and (C) a drug having small animal control properties has been introduced. (For example, refer to Patent Document 2).

In recent years, among various pest repellents used for pest repellent members, hinokitiol extracted from natural products, etc. because it is highly safe for humans, easy to return to nature, and environmentally friendly Drugs containing as an active ingredient are preferably used. As such a pest repellent composition, for example, a biodegradable resin that disintegrates in the presence of moisture and anaerobic bacteria, a naturally occurring animal repellent selected from the group consisting of herbs containing hinokitiol, terpenes, thymol Kneading agent and surfactant are introduced. (For example, refer to Patent Document 3).
JP 2004-357553 A JP 2000-21205 A Japanese Patent No. 2943135

  Naturally derived pest repellents have a pest repellent effect, have low toxicity and a broad antibacterial spectrum, and are expected as environmentally friendly pest repellent members. Among these, as a method of using hinokitiol as a pest repellent, for example, a method in which a solution in which hinokitiol is dispersed in a solvent is applied to a desired region, or a pest repellent composition in which hinokitiol is dispersed and supported in a resin The pest repellent member is processed into an arbitrary shape, and the pest repellent member is installed at a desired location.

  However, the method of applying a solution in which hinokitiol is dispersed in a solvent, the hinokitiol is easily sublimated and diffused, is easily decomposed by ultraviolet rays, has a pest repellent effect only for a short time, and needs to be applied periodically and repeatedly. . In addition, the insect repellent composition in which hinokitiol is dispersed and supported in the resin can reduce the degradation of hinokitiol by sublimation and ultraviolet rays, but the effect of supporting hinokitiol is low and the insect repellent effect is maintained over a long period of time. Is difficult.

  Moreover, the insect repellent composition described in Patent Document 3 described above is obtained by kneading hinokitiol in a biodegradable resin, and the hinokitiol dispersed in the resin is completely removed within about 2 to 3 months from the inside of the resin. I will be released. Further, the insect repellent effect can be maintained until the biodegradable resin is completely biodegraded. Here, since the pests to be repelled often prefer moisture or high humidity, the pest repellent composition is usually placed in a high-humidity place where moisture exists. However, since the biodegradable resin used in the pest repellent composition described in Patent Document 3 is easily biodegradable in the presence of moisture, the pest repellent effect is maintained over a long period of time in a high-humidity location where moisture exists. Difficult to maintain.

  The present invention has been made in view of such circumstances, and is a pest repellent composition using a naturally-derived component as a pest repellent, and is a place of high temperature and high humidity as well as a place of normal temperature and humidity. However, an object of the present invention is to provide a pest repellent composition capable of releasing a pest repellent component and capable of exerting a pest repellent effect over a long period of time.

In order to achieve this object, the present invention comprises a resin, an inorganic filler, and a pest repellent that is a naturally derived component, and the inorganic filler is coated with an organic substance. Oil absorption is 10 ml / 100 g or more and 120 ml / 100 g or less, pH of the inorganic filler is pH 4 or more and pH 10 or less, and the organic substances are stearic acid, oleic acid, palmitic acid, linoleic acid, lauric acid , Caprylic acid, behenic acid, and montanic acid , or a salt thereof, an ester compound thereof, an amide compound thereof; octyl alcohol, decyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, and stearyl alcohol; coconut oil, soybean oil, flaxseed A pest repellent composition selected from the group consisting of oil and safflower oil It is intended to provide.

  The pest repellent composition having this configuration can prevent the surface of the inorganic filler from coming into contact with the pest repellent because the inorganic filler is coated with an organic substance. Here, the pest repellent, a naturally-derived component, is highly safe for humans and the like, is easy to attribute naturally, is friendly to the environment, but is easy to decompose, so its chemical structure is likely to change when it comes into contact with inorganic fillers, It is known that the pest repellent effect tends to decrease. In this invention, it can prevent that a pest repellent contacts an inorganic filler by coat | covering an inorganic filler with organic substance, and can suppress that a chemical structure changes. Furthermore, the pest repellent is reliably supported on an inorganic filler coated with an organic substance, and the pest repellent is released to the extent that it has an effect on the pest. Therefore, the pest repellent component can be maintained and released even in a place of high temperature and humidity as well as a place of normal temperature and humidity, and a pest repellent effect can be exhibited over a long period of time.

  In addition, the inorganic filler contained in the pest repellent composition according to the present invention preferably has an oil absorption of 10 ml / 100 g or more and 120 ml / 100 g or less. When the oil absorption amount of the inorganic filler is less than 10 ml / 100 g, it is difficult to obtain the effect of suitably carrying the pest repellent. On the other hand, when the oil absorption amount of the inorganic filler exceeds 120 ml / 100 g, there is a possibility that the release of the pest repellent component is hindered.

  The inorganic filler contained in the pest repellent composition according to the present invention preferably has a pH of 4 or more and a pH of 10 or less. If the alkalinity and acidity are strong, the pest repellent reacts and the pest repellent effect tends to be reduced.

  Examples of the inorganic filler contained in the pest repellent composition according to the present invention include calcium carbonate, calcium phosphate, magnesium silicate, aluminum silicate, titanium oxide, potassium titanate, calcium silicate, zinc oxide, aluminum borate, and alumina ( Aluminum oxide) and the like. The shape of the inorganic filler may be any of spherical, granular, needle (bar) shape, plate shape, and the like.

  The resin contained in the pest repellent composition according to the present invention includes, for example, PCL (polycaprolactone), PBS (polybutylene succinate), PBSA (polybutylene succinate adipate), PE (polyethylene), EVA. (Ethylene / vinyl acetate copolymer resin), EEA (ethylene / ethyl acrylate copolymer resin), etc., for example, at a temperature of 150 ° C. or less, which is a temperature range in which a pest repellent composed of a naturally derived component does not excessively evaporate or volatilize Examples thereof include thermoplastic resins that can be processed.

  Furthermore, examples of the naturally-occurring pest repellent contained in the pest repellent composition according to the present invention include hinokithiol contained in Taiwan Hinoki, Asunaro, Hinoki Asunaro (Aomori Hiba), etc., and casinoal contained in Hinoki. Derivatives (α-casinoal, T-casinoal) and geraniol, pinene, caryophyllene, borneol, eugenol and the like that are abundant in perfume plants such as clove, nutmeg, coriander, cumin and the like can be mentioned.

  Moreover, as an organic substance which coat | covers the inorganic filler concerning this invention, a higher fatty acid, a higher fatty acid salt, a higher fatty acid metal salt, a higher fatty acid ester, a higher fatty acid amide, a higher alcohol, fats and oils etc. are mentioned, for example.

  Examples of the higher fatty acid include stearic acid, oleic acid, palmitic acid, linoleic acid, lauric acid, caprylic acid, behenic acid, and montanic acid.

  Examples of higher fatty acid metal salts include stearates, oleates, palmitates, linoleates, laurates, caprates, behenates, montanates, and the like. Na, K, Al, Ca, Mg, Zn, Ba, and the like.

  Examples of the higher fatty acid esters include methyl laurate, methyl myristate, methyl palmitate, methyl stearate, methyl oleate, methyl erucate, methyl behenate, butyl laurate, butyl stearate, and myristic acid. Isopropyl, isopropyl palmitate, octyl palmitate, octyl palm fatty acid, octyl stearate, special beef tallow fatty acid octyl ester, lauryl laurate, stearyl long stearate, higher fatty acid ester of long chain fatty acid, behenyl behenate, cetyl myristate And monoesters such as Further, for example, neopentyl polyol long chain fatty acid ester, partially esterified product of neopentyl polyol long chain fatty acid ester, neopentyl polyol fatty acid ester, neopentyl polyol medium chain fatty acid ester, neopentyl polyol C9 chain fatty acid ester, dipentaerythritol length Examples include heat-resistant special higher fatty acid esters such as chain fatty acid esters and complex medium chain fatty acid esters.

  Examples of higher fatty acid amides include stearic acid amide, oleic acid amide, palmitic acid amide, linoleic acid amide, lauric acid amide, caprylic acid amide, behenic acid amide, and montanic acid amide.

  Furthermore, examples of the higher alcohol include octyl alcohol, decyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol and the like.

  Examples of the fats and oils include coconut oil, soybean oil, linseed oil, safflower oil, and the like.

  The present invention also provides a pest repellent member that is installed on a target object and prevents a pest from entering the target object, at least a part of which is formed from the pest repellent composition described above. A repellent member is provided.

  The pest repellent member having this configuration is composed of a naturally-derived component, so that the pest repellent is highly safe for human beings, is easy to return to nature, and is environmentally friendly. Because it is supported by an inorganic filler coated with, it can maintain and release pest repellent components in a place of high temperature and humidity as well as a place of normal temperature and humidity, and can be released for a long time. The pest repellent effect can be exhibited throughout.

  In the pest repellent composition according to the present invention, the pest repellent is composed of naturally-derived components, is highly safe for humans and the like, is easy to return to the environment, is friendly to the environment, and is of course not only in a place of normal temperature and humidity. In addition, it is possible to maintain and release the pest repellent component even in a hot and humid place, and to exert the pest repellent effect over a long period of time, thereby extending the expiration date of the pest repellent composition And the effect of reducing the amount of waste can be obtained.

  In addition, the pest repellent member according to the present invention is a pest repellent composed of naturally derived components, is harmless to humans and the like, is easy to return to the environment, is friendly to the environment, and of course at normal temperature and humidity, Even in hot and humid places, pest repellent components can be maintained and released, and the pest repellent effect can be demonstrated over a long period of time, resulting in reduced frequency of replacement of pest repellent members It is possible to obtain an effect such as being economical and reducing the amount of waste.

  Next, the pest repellent composition and the pest repellent member according to preferred embodiments of the present invention will be described. In addition, embodiment described below is the illustration for demonstrating this invention, and this invention is not limited only to these embodiment. Therefore, the present invention can be implemented in various forms without departing from the gist thereof.

(Manufacture of pest repellent composition)
Laboplast mill (manufactured by Toyo Seiki Co., Ltd.), 5% by mass of hinokitiol (manufactured by Asahi Kasei Finechem) as a pest repellent of naturally derived components, and 65% by mass of polycaprolactone (PCL) (manufactured by Daicel Chemical Industries: CBS101 (product surface)) as a resin Then, 20% by mass of an inorganic filler (calcium phosphate) coated with an organic substance (fatty acid), 5% by mass of liquid paraffin, and 5% by mass of ethanol are mixed and kneaded at about 120 ° C. for about 5 minutes to obtain a pest repellent composition. It was. The oil absorption of the inorganic filler (calcium phosphate) is about 100 ml / 100 g, and the pH is about 7.

(Manufacture of pest repellent members)
A pest repellent member (invention product) was obtained by molding the pest repellent composition obtained by the above production method into a plate shape using a heating press. Next, as a comparison, except that an inorganic filler (calcium phosphate) is not coated with an organic substance (fatty acid), a pest repellent composition produced in the same manner as described above is used, and the same heating press machine as that of the invention product is used. A shaped pest repellent member (comparative product) was obtained.

(Insect repellent repellent performance evaluation test)
A repellent evaluation test was performed on the inventive product and the comparative product obtained by the above manufacturing method. In this embodiment, as this repellency evaluation test, the shelter test described below was performed under the conditions shown in Table 1.

  First, the invention, food, and water container are installed in the test field. In addition, the water container used what put the gauze soaked in the plastic container. Next, shelters are installed on the invention and on the floor in the test field, and German cockroaches are placed as test insects in each shelter. After leaving in this state for 10 hours, while taking a video of the entire test field, the shelter installed on the product and the shelter installed on the floor were removed at the same time. Count the number of test insects. Thereafter, the repellent rate of the test insects was calculated by Equation 1. The results are shown in Table 2.

Formula 1

  Next, as a comparison, a test similar to the above-described shelter test was performed except that a comparative product was used instead of the invention product, and the repellent rate of the test insect was calculated using Equation 1. The results are shown in Table 2.

(Insect repellent performance evaluation test after high temperature acceleration test)
Next, the inventive product and the comparative product were allowed to stand for 360 hours in an environment at a temperature of 60 ° C. (high-temperature acceleration test was performed), and then the inventive shelter and the comparative product were each subjected to the same shelter test as in Formula 1 The repellent rate of the test insects was calculated respectively. The results are shown in Table 2.

  From Table 2, it can be seen that the invention product and the comparative product before the high-temperature acceleration test both have an excellent insect repellent effect with a test insect repellent rate of 100%. In addition, after the high-temperature acceleration test, the repellent rate of the test insect of the invention is 94%, whereas the repellent rate of the comparative test insect is remarkably lowered to -29%. From this, it can be seen that the inventive product maintains the insect repellent effect over a long period of time compared to the comparative product.

  In the above embodiment, the case where calcium phosphate is used as the inorganic filler and the fatty acid is used as the organic substance covering the calcium phosphate has been described. However, even if the above-described materials are used as the inorganic filler or organic substance, an excellent insect repellent effect Was confirmed to be maintained over a long period of time.

  The pest repellent member according to the present invention is installed on a target object and can prevent a pest from entering the target object, but its shape, size, etc. are the characteristics of the target object (shape, It can be arbitrarily determined according to the size, type, use, etc.). As an example of the mode, for example, as shown in FIG. 1, a pest repellent member 10 having a spirally wound shape so as to form a space inside can elastically deform this spiral shape. In other words, when the pest repellent member 10 fixes one end 10a and rotates the other end 10b in the winding direction (clockwise in FIG. 1), the elastic force that converges in the central axis direction is released. The pest repellent member 10 is elastically deformed so that the inner diameter is enlarged. When the other end 10b is opened in this state, an elastic force that converges in the central axis direction of the pest repellent member 10 works, and the pest repellent member 10 returns to its original shape. Accordingly, the pest repellent member 10 wound in a spiral shape exhibits an excellent pest repellent effect over a long period of time, and in addition, a plurality of wires, rod-shaped members, and the like are inserted into the inner space and bundled together. be able to.

  Moreover, as another aspect of a pest repellent member, as shown in FIG. 2, the pest repellent member 11 which rolled the corrugate-shaped sheet | seat 12 so that it may become a hollow substantially cylindrical shape is mentioned, for example. In this sheet 12, convex portions 13 and concave portions 15 are alternately formed, and when the sheet 12 is rounded into a hollow substantially cylindrical shape, the end portions opposed to each other are gaps (slits). 17 is formed. The pest repellent member 11 can widen the gap 17 and return the widened gap to the original state (or almost the original state). Accordingly, the gap 17 can be widened and a plurality of wires, rod-like members, etc. can be inserted into the hollow portion from here, and after the wires, rod-like members, etc. are inserted into the hollow portion, the gap 17 is restored to the original state (or , Almost return to the original state), and these can be bundled.

  The pest repellent member according to the present invention may be entirely formed of the pest repellent composition according to the present invention, or a part thereof may be formed of the pest repellent composition according to the present invention. Good.

It is a perspective view of the pest repellent member concerning embodiment of this invention. It is a perspective view of the pest repellent member concerning other embodiment of this invention.

Explanation of symbols

10, 11 Pest repellent member 12 Sheet 13 Convex part 15 Concave part 17 Crevice

Claims (2)

Containing a resin, an inorganic filler, and a naturally-derived pest repellent,
The inorganic filler is coated with an organic substance,
The amount of oil absorption of the inorganic filler is 10 ml / 100 g or more and 120 ml / 100 g or less,
PH of the inorganic filler is pH 4 or more and pH 10 or less,
The organic substance is stearic acid, oleic acid, palmitic acid, linoleic acid, lauric acid, caprylic acid, behenic acid, and montanic acid , or a salt thereof, an ester compound thereof, an amide compound thereof;
Selected from the group consisting of octyl alcohol, decyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, and stearyl alcohol; and coconut oil, soybean oil, linseed oil, and safflower oil,
Pest repellent composition. A pest repellent member that is installed on a target and prevents a pest from entering the target,
A pest repellent member formed at least partially from the pest repellent composition according to claim 1.

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