JP6529554B2 - Drug volatile substance - Google Patents

Description

  The present invention relates to a drug volatilization body for exterminating and repelling flying pests such as mosquitoes and flies, and more specifically, a drug volatilization comprising a fibrous material and comprising a mesh containing pyrethroid repellent component at normal temperature volatilization. It is about the body.

DESCRIPTION OF RELATED ART Conventionally, the insect repellent which exterminates and repels a pest by volatilizing the normal temperature volatile insect repellent in air is known.
For example, Patent Document 1 below discloses a drug volatilization body using a plurality of net-like products made of twisted yarn impregnated with an insect repellent component.
Further, Patent Document 2 below discloses a pest control molded article in which a plurality of grooves are formed at intervals of 300 μm or less on the surface of a resin molded body to prevent stickiness of a pest control active ingredient.

JP, 2001-200239, A JP, 2009-19015, A

  By the way, although these insect repellents are often suspended and used by a window, a front door, etc., in this case, they may feel in the way of a moth repellent, or they may be disturbed. In order to solve this problem, it is conceivable to reduce the presence of the insect repellent by reducing the size or thickness of the entire insect repellent.

  However, in the drug volatilization body described in Patent Document 1, a flat mesh made of a resin non-adsorbable to an insect repellent component such as polyethylene terephthalate (PET) is basically formed, and the insect repellent component is a twist. It is only in the state of being attached or impregnated near the surface of the yarn although it is impregnated in the yarn. Therefore, depending on the shape of the cross section, when the twisted yarn is cut into a cross section, the insect repellent component may be located at the center of the cross section and have a distance to the outer periphery, but the volatilization speed of the insect repellent component is extremely high. fast. For this reason, even if relatively high insect repellent effect could be exhibited in the early stage of use, it could not sufficiently cope with long-term use reaching 100 days or more. In addition, since the insect repellent component is near the surface of the twisted yarn, there is a problem that it is easily affected by rain when used outdoors, and the outflow loss of the insect repellent component can not be avoided.

  On the other hand, since the pest control active ingredient described in Patent Document 2 is carried in a state in which the pest control active ingredient is mixed with the resin carrier, the pest control active ingredient is more effective than the drug volatile body described in Patent Document 1. It has the feature of being able to suppress and stabilize the volatilization rate of However, when it rains, the volatilization of the pest control active ingredient may be inhibited by water, and the control effect may be reduced.

  In view of the above-described conventional problems, the present inventors twist a drug volatilization body in which resin filaments obtained by kneading and forming a room temperature volatile pyrethroid type insect repellent component into a resin carrier are formed, or twist resin filaments in advance. With regard to a drug volatilization body in which a three-dimensional structure consisting of a mesh was impregnated with a room temperature volatilizable pyrethroid repellent component, intensive investigation was conducted on the case of rain. That is, an object of the present invention is to provide a drug volatilization body which retains volatilization performance even when the drug volatilization body is exposed to rain.

The present invention has been found out that the following constitution has excellent effects to achieve the above object.
(1) In a drug volatilization body comprising a structure having a mesh comprising a fibrous material containing a normal temperature volatile pyrethroid repellent component, the fibrous material comprises a resin filament, and the structure relative to the weight of the structure A drug volatilization body characterized in that a water retention ratio, which is an amount capable of retaining water, is 0.005 or more and 0.5 or less.
(2) The drug volatilization body according to (1), wherein the size of the mesh portion of the structure is 10 mm ² or more and 200 mm ² or less.
(3) The drug volatilization body according to (1) or (2), wherein the resin filament is formed by kneading the room temperature volatile pyrethroid type insect repellent component into a resin carrier and then molding.

  In the drug volatilization body of the present invention, the amount by which the structure can retain water, that is, the water retention ratio, with respect to the weight of the structure is within a predetermined range. Control of volatilization of components can be improved.

It is a perspective view which shows the example of a planar net | network. (A) is a perspective view which shows the example of a three-dimensional structure, (b) is a front view of (a), (c) is cc sectional drawing of (b).

  The drug volatilization body of the present invention is a drug volatilization body composed of a structure having a planar or three-dimensional mesh composed of a fibrous material containing a room temperature volatile pyrethroid repellent component.

[Temperature volatile volatile pyrethroid insect repellent ingredient]
The normal temperature volatile pyrethroid insect repellent component preferably has the property of volatilizing in air at normal temperature, and has a vapor pressure of about 0.001 Pa to about 0.1 Pa at 25 ° C. Specifically, at least one of metfluthrin, profluthrin, transfluthrin, and empentrin may be mentioned from the viewpoint of volatilization performance and safety. In addition, although various optical isomers or geometric isomers exist about these insect-repellent components, even if it is an individual and a mixture, any isomers can also be used.

[Fibrous material]
The fibrous material is a fibrous material, and long fibers (filaments) themselves, long fibers and short fibers are twisted to form a fiber, and the like. In general, the water retention ratio tends to be increased by using a fibrous material which is twisted together, but if the value is within a predetermined range, the effect of the present invention can be exhibited. In the present invention, it is preferable to use long fibers (filaments), and in particular, using resin long fibers (resin filaments) obtained by molding using a resin composition containing a resin carrier described later as a material, Durability becomes high and is preferable.

  In the present invention, the normal temperature volatile pyrethroid type insect repellent component is contained in the resin filament. As a method of containing the normal temperature volatile pyrethroid type insect repellent component, a method of obtaining the resin filament by kneading the normal temperature volatile type pyrethroid type insect repellent component in the later described resin carrier to prepare the later described resin composition, First, a resin composition is molded to obtain resin filaments, and then the resin filaments are twisted to form a mesh, and the above-mentioned normal temperature volatile pyrethroid insect repellent component is impregnated.

  As a method of molding a postscript resin composition, the post extrusion resin composition is extrusion-molded or injection-molded to obtain a resin filament, and then a method of forming a mesh, the postscript resin composition is directly injected by resin molding, etc. And the like.

[Resin composition]
The resin composition is obtained by kneading a fine powder carrier and another resin carrier with a resin carrier as required. In addition, after molding this resin composition into pellets once, it is preferable in terms of efficiency to perform the above molding.

[Resin carrier]
The resin carrier is somewhat different depending on whether the cold volatilizable pyrethroid type insect repellent component is kneaded or impregnated. That is, in the case of the former, it is not particularly limited as long as the insect repellent component mixed in the inside of the carrier can be gradually bled and volatilized on the surface, for example, polyolefin such as polyethylene resin and polypropylene resin Examples thereof include those based on a system resin or a polymer obtained by polymerizing a monomer such as a carboxylic acid ester. Here, a monomer such as a carboxylic acid ester is effective for controlling volatilization of the insect-repellent component from the surface of the resin carrier, and examples thereof include methyl acrylate, ethyl acrylate, methyl methacrylate and methacrylic acid. Ethyl, vinyl acetate and the like can be mentioned.

  In addition, since the blending ratio of these carboxylic acid ester monomers to the polyolefin resin generally tends to delay the bleeding speed of the insecticidal component as the blending ratio of the carboxylic acid ester monomer increases, the insect repellent component to be used It may adjust suitably in 1-30 mass% with respect to polyolefin resin according to the kind, content, purpose of use, etc. of.

  In addition, as the above resin carrier, a polymer blend in which a polyolefin copolymer containing a large amount of carboxylic acid ester monomer and an olefin homopolymer are mixed with adjusting the content ratio may be used. Furthermore, other high molecular compounds such as styrenic thermoplastic elastomer can also be contained, if necessary.

  In the present invention, an ethylene-vinyl acetate copolymer is preferable in terms of performance and usability, and the number ratio of ethylene units to vinyl acetate units in the ethylene-vinyl acetate copolymer is 90:10 to 70:30. preferable. If the amount of the vinyl acetate unit is too small, the physical properties are almost the same as polyethylene, and the bleeding adjustment effect required in the present invention can hardly be expected. On the other hand, when there are too many vinyl acetate units, it will become difficult to shape | mold into resin pellet form.

  The melt mass flow rate (MFR) of the ethylene-vinyl acetate copolymer is preferably 5 g / 10 min or more and 50 g / 10 min or less. If the MFR is too small, the effect as a bleed regulator can not be expected, and if the MFR is too large, the influence on the physical properties of the resin pellet may not be negligible.

On the other hand, in the case of a chemical volatilization body of the type in which a pyrethroid type insect repellent component is impregnated at normal temperature, a resin carrier is usually a resin non-adsorbable to an insect repellent component such as polyethylene terephthalate (PET) or polybutylene terephthalate (PBT). Generally used as the subject.
The insect repellent component is supported on the surface of a resin carrier having a planar or three-dimensional mesh and subjected to volatilization. Such a resin is blended with such a resin as a polyolefin resin, a styrene thermoplastic elastomer, or rayon. The resin carrier can be modified to adjust the volatilization of the insect repellent component.
Hereafter, the chemical volatilization body of the type which knead | mixes a normal temperature volatilization pyrethroid type insect repellent component is explained in full detail.

[Fine powder carrier]
The above-mentioned fine powder carrier used in the present invention is a component that can be added in order to carry a pyrethroid type insect repellent component at normal temperature volatilization in a resin pellet. For example, microcrystalline silica, so-called white carbon, finely powdered silicic acid, diatomaceous earth, zeolites, viscosity minerals, wood flour and the like can be mentioned.

  The fine powder carrier preferably has a number average particle diameter of 1 μm to 30 μm, and more preferably 5 μm to 20 μm. If the number average particle size exceeds 30 μm, the surface area is insufficient even if the content is in the above range, so it becomes difficult to support the insect repellent component as a carrier, and the resulting resin pellet becomes easily sticky. On the other hand, fine particles less than 1 μm are practically difficult and are not preferable because the physical properties are greatly changed.

  A fine powder carrier containing microcrystalline silica or the like such as white carbon does not react with the insect repellent component, and a fine powder having a large surface area can be used. These fine powder carriers support the insect repellent component to suppress the stickiness, and as a result, the resin composition obtained by kneading together with the resin component is also less sticky as a whole and can be suitably used as a master batch.

[Other resin carrier]
In addition to the resin carrier such as the ethylene-vinyl acetate copolymer described above, another resin carrier may be kneaded in order to adjust the weight and physical properties of the resin composition. As another resin carrier, a polyolefin resin or a styrene resin may be contained. Examples of the polyolefin resin include polyethylene (PE) and polypropylene (PP), but polyethylene is preferable in view of affinity with ethylene-vinyl acetate copolymer and ethylene-methyl methacrylate copolymer. Particularly preferred are low density polyethylenes, specifically branched low density polyethylene (LDPE) and linear low density polyethylene (LLDPE).

[Blending ratio]
The compounding amount of the resin carrier is preferably 10% by mass or more, and more preferably 20% by mass or more, with respect to the entire resin composition. If it is less than 10% by mass, the effect of suppressing excessive bleeding will be insufficient. On the other hand, the upper limit is preferably 90% by mass or less, and more preferably 60% by mass or less. When the amount is too large, bleeding is too suppressed even in resin molded products obtained by using the pellets of the resin composition as a master batch and kneading with the other resin carrier, and the normal purpose volatilization pyrethroid which is the original purpose It is because there is a possibility that the insect repellent effect by volatilization of a system insect repellent component may be reduced excessively. According to the present invention, bleeding of resin pellets obtained by mixing with 10% by weight or more and 90% by weight or less of ethylene-vinyl acetate copolymer and / or ethylene-methyl methacrylate copolymer is within a suitable range. It becomes possible to adjust.

The content of the fine powder carrier is preferably 30% by mass or less, and more preferably 25% by mass or less, based on the entire resin composition. If it exceeds 30% by mass, it is difficult to maintain the form as pellets when the resin composition is pelletized because of the compounding ratio with the resin carrier. Moreover, since it will be contained also in the molded article using the said resin composition, the danger which affects the physical property of a chemical volatilization body is not avoidable when too large.
The lower limit of the content of the fine powder carrier to the entire resin composition is not particularly limited, but in the case where it is necessary to suppress excessive bleeding, it is set to 10% by mass or more. It is preferable to do. If it is less than this lower limit value, the suppression effect may become insufficient.

[Production of Resin Composition and Pellet]
The resin composition can be obtained by heating the resin carrier and kneading the above-mentioned normal temperature volatile pyrethroid type insect repellent component, and, if necessary, a fine powder carrier and another heated resin carrier. And it can be obtained by pelletizing this and cooling it.

  The heating temperature depends on the type of resin of the resin carrier to be used and the type of resin of the other resin carrier, but usually about 100 to 140 ° C. is appropriate. For example, the melting point of an ethylene-vinyl acetate copolymer (manufactured by Tosoh Corp .: Ultracene 710) described later is 70 ° C., and sufficient kneading is possible. If the heating temperature is increased too high to exceed 140 ° C., the thermal decomposition and transpiration loss of the room temperature volatile pyrethroid type insect repellent component may be caused, which is not preferable.

  Based on the above, as a typical composition of the resin composition, 10% by mass to 60% by mass normal temperature volatile pyrethroid insect repellent component, 30% by mass or less fine powder carrier, and 10% by mass to 60% by mass Examples include combinations containing a resin carrier such as the following ethylene-vinyl acetate copolymer.

[Mixing time of other resin carrier]
By the way, as mentioned above, the above-mentioned other resin carrier may be contained in the production stage of the pellet of the above-mentioned resin composition, and the pellet of the above-mentioned resin composition is fabricated without containing this other resin carrier. Then, the pellet may be diluted with the other resin carrier, kneaded and molded to obtain the drug volatilization body.

  The dilution factor at this time is preferably 1.5 times or more and the upper limit is about 5 times. If it is less than 1.5 times, there is no merit in the dilution process, while if it is more than 5 times, there is a problem that the content of the insect repellent component must be naturally reduced.

[Drug eliminator]
Pellets made of the above resin composition are molded into a drug volatilization body. Further, as described above, when the other resin carrier is not contained in the insect-repellent component-containing resin pellet, the insect-repellent component-containing resin pellet is diluted with the other resin carrier, and is kneaded and formed. It may be a drug volatilizer.

  This drug volatilization body is a structure having a shape formed into a preferably three-dimensional mesh by combining resin filaments. As this molding method, first, the pellets are molded by extrusion molding, injection molding or the like to obtain resin filaments, and then, a method of constructing a mesh, or a plurality of the above-mentioned insect-repellent component-containing resin pellets are directly molded by injection molding or the like And a method of forming a mesh by crossing resin filaments of

  Examples of the mesh structure include a planar net 1 as shown in FIG. 1 and a three-dimensional structure 2 as shown in FIGS. 2 (a) to 2 (c). In addition, as a shape of the drug volatilization body which has said mesh structure, it is not limited to these examples.

  The planar net shown in FIG. 1 is one in which the filaments are crossed in a lattice to form a planar lattice structure.

  Further, the three-dimensional structure 2 shown in FIGS. 2 (a) to 2 (c) is substantially perpendicular to the filament of the rectangular wave 21 shown in FIG. 2 (c) and the two waves 21 at the top. It is intended to be crossed. Further, in the three-dimensional structure 2, at least two crests included in one crest-containing surface are reinforced by a reinforcing member 22 formed of a linear rod-like body. The top portion-containing surface is a surface that constitutes the three-dimensional structure, and is a surface on which the top portion is disposed.

Such a three-dimensional structure 2 can increase the surface area of the filaments present in a certain volume as compared to the planar net 1. Furthermore, when the reinforcing material 22 is used, the surface area of the filament can be further increased, and the strength of the three-dimensional structure can also be improved.
In addition, a peripheral part is suitably determined by relationship with the intensity | strength of a three-dimensional structure, a shape, an external container, etc. FIG.

[Water holding ratio]
The water retention ratio of the structure, that is, the amount that the structure can retain water (the amount that the structure can retain water (weight part) / weight of the structure (weight part)) relative to the weight of the structure is 0. 005 or more is good, 0.01 or more is preferable. If it is smaller than 0.005, it may cause problems in manufacturing such as mesh molding. On the other hand, the upper limit of the water retention ratio is preferably 0.5, preferably 0.4. If it is larger than 0.5, rainwater may significantly suppress volatilization of the normal temperature volatilization insect repellent component, which may cause a problem that the expected insect repellent effect can not be obtained. The amount that the structure can retain water means the amount of water that physically adheres to the depressions and gaps of the structure.

[Size of mesh]
The size of the mesh is the size of the mesh portion of the structure, that is, the surface area of the mesh portion of the structure, which is formed by one eye (minimum mesh) surrounded by each resin filament area enclosed by the center line of the peripheral resin filaments) is, 10 mm ² or more is good, 20 mm ² or more. If the width is smaller than 10 mm ² , the attached water is likely to block the mesh by tension, and as a result, the flow of air through the mesh may be blocked, which may result in the problem of suppressing the volatilization of the insect repellent component. The upper limit of the surface area, 200 mm ² selfishness, 150 mm ² is preferred. If the width is larger than 200 mm ² , the mesh strength is weak and easily deformed and thus difficult to handle. In addition, the surface area of the structure containing the insect repellent component may be insufficient.

[Flight pest repellent flavor composition]
By the way, in addition to the above-mentioned normal temperature volatile pyrethroid type insect repellent component, the drug volatile substance of the present invention is added to normal temperature volatile pyrethroid type insect repellent component especially for the purpose of imparting aroma and reinforcing insect repellent effect at the initial stage of use. Thus, it can contain a flying pest repellent flavor composition.

  The flying pest repellent flavor composition is a composition comprising a flying pest repellent flavor and, preferably, a repellent effect sustaining component.

As the flying pest repellent flavoring agent, at least one flavoring component selected from an acetic acid ester compound represented by the following general formula (I) and / or an allyl ester compound represented by the general formula (II) Examples of the component include (a) and one or two or more flavor components (b) selected from monoterpene alcohols or aromatic alcohols having 10 carbon atoms.
CH ₃ -COO-R ₁ (I)
(Wherein, R ₁ represents an alcohol residue having 6 to 12 carbon atoms.)
R ₂ -CH ₂ -COO-CH ₂ -CH = CH ₂ (II)
(Wherein R ₂ represents an alkyl group having 4 to 7 carbon atoms, an alkoxy group, a cycloalkyl group, a cycloalkoxy group, or a phenoxy group.)

  Specific examples of the acetic acid ester compound represented by the above general formula (I) include p-tert-butylcyclohexyl acetate, o-tert-butylcyclohexyl acetate, tert-pentylcyclohexyl acetate, tricyclodecenyl acetate, and benzyl acetate , Phenylethyl acetate, styrylyl acetate, anicyl acetate, cinnamyl acetate, terpinyl acetate, dihydroterpinyl acetate, linalyl acetate, ethyl linalyl acetate, citronellyl acetate, geranyl acetate, neryl acetate, bornyl acetate, and Isobornyl acetate and the like can be mentioned.

  Further, specific examples of the allyl ester compound represented by the general formula (II) include allyl hexanoate, allyl heptanoate, allyl octanoate, allyl isobutyl oxyacetate, allyl n-amyl oxy acetate, allyl cyclohexyl acetate And allyl cyclohexyl propionate, allyl cyclohexyl oxyacetate, allyl phenoxy acetate and the like.

  Further, specific examples of the component (b) include terpineol, geraniol, dihydromyrcenol, borneol, menthol, citronellol, nerol, linalool, ethyl linalool, thymol, eugenol, and p-menthane-3,8-diol and the like. can give.

  The compounding ratio of (a) to (b) is preferably 0.1 to 1.0 times. Within this range, it was found that a high repellent effect was exerted against flying pests.

  In addition, as the flying pest repellent flavor, flavor components other than the above, for example, monoterpene hydrocarbons such as limonene, menthol, carvone, monoterpene ketones such as camphor, camphor, damascone, citral, citronellal, neral, perilla Monoterpene aldehydes such as aldehydes, ester compounds such as cinnamyl formate, geranyl formate, phenylethyl alcohol, diphenyl oxide, indole aroma, or various essential oils containing the above perfume ingredients, eg, jasmine oil, neroli oil, Peppermint oil, bergamot oil, orange oil, geranium oil, petit gren oil, lemon oil, citronella oil, lemongrass oil, cinnamon oil, eucalyptus oil, lemon eucalyptus oil, thyme oil, etc. may be added as appropriate.

  It is preferable to use 1 type, or 2 or more types of glycol and / or glycol ether with a vapor pressure of 0.2 to 20 Pa at 20 ° C. as the repelling effect maintaining component. Conventionally, glycols and / or glycol ethers are listed as solvents in the same line as ethanol, isopropanol, kerosene, etc., and the effect on flying pests is not mentioned at all. Or, glycol ether not only acts as a solvent, but also exerts a sustained action of repellent effect specifically to the flying pest repellent perfume, and can maintain the initial flavor if the aromatic flying pest repellent perfume is used Found out.

  Specific examples of the repellent effect-retaining component (including vapor pressure at 20 ° C.) include propylene glycol (10.7 Pa), dipropylene glycol (1.3 Pa), tripropylene glycol (0.67 Pa), and diethylene glycol (diethylene glycol (0.67 Pa)). 3 Pa), triethylene glycol (1 Pa), 1,3-butylene glycol, hexylene glycol (6.7 Pa), benzyl glycol (2.7 Pa), diethylene glycol monobutyl ether (3 Pa), dipropylene glycol monobutyl ether, and tripropylene Glycol monomethyl ether is mentioned, among which dipropylene glycol is preferred.

  The compounding ratio of the repellent effect persistent component to the flying pest repellent perfume is preferably 0.2 to 10 times. It was recognized that the repellent effect of the flying pest repellent flavor can be sufficiently sustained within this range.

  By the way, when mix | blending the said flying pest repellent fragrance composition, the compounding ratio with respect to the said normal temperature volatilization pyrethroid type | mold insect repellent component is about 0.2 to 2 times amount suitable. If the blending amount of the perfume composition is too small, the purpose of imparting the aroma can not be achieved, while if too much, the aroma is too strong and volatilization of the insect repellent component may be affected, which is not preferable.

  In the case of using the flying pest repellent flavor composition, when preparing the insect repellent component-containing resin pellet, the flying pest repellent flavor composition may be contained, but the insect repellent component-containing resin pellet and the flying pest repellent flavor It is preferable to knead both pellets after preparing each of the component-containing pellets. This is because the heating temperature at the time of manufacturing the flying pest repellent flavor component-containing pellet is 90 to 130 ° C., which is lower than 110 to 140 ° C. in the case of the insect-repellent component-containing resin pellet. It is because it is advantageous in reducing loss for high perfume compositions.

[Content of room temperature volatile pyrethroid insect repellent component]
The content of the room temperature volatile pyrethroid type insect repellent component carried on the resin carrier of the drug volatilization body is not particularly limited because it varies depending on the type of insect repellent component to be used, operating environment, operating conditions, etc. . However, in order to secure the amount of insect repellent component necessary for insect repellent effect and to facilitate molding after kneading the insect repellent component, it is further prevented that the insect repellent component bleeds excessively on the surface of the resin carrier to cause stickiness. In order to achieve this, the content is preferably in the range of 0.5 to 20% by mass.

  When the content of the insect repellent component is less than 0.5% by mass, it becomes difficult to secure the amount of the insect repellent component necessary for exerting the insect repellent effect, while when the content of the insect repellent component exceeds 20% by mass However, molding after kneading the insect repellent component is difficult, and the insect repellent component is excessively bled on the surface of the resin carrier to cause stickiness.

  Here, if the content of the above-mentioned normal temperature volatile pyrethroid type insect repellent component is exemplified, the amount of about 30 to 2000 mg can be raised corresponding to the use period of about 30 to 365 days.

  That is, when setting the content, although it varies depending on the type of insect repellent component to be used, for example, when metfluthrin alone is used, the minimum volatilization amount required for the insect repellent effect to appear is 0.03 mg / hr or more Since profluthrin alone is 0.03 mg / hr or more and transfluthrin alone is 0.06 mg / hr or more, the content in 30 days to 365 days is 30 to 1000 mg for metfluthrin and 30 for It is sufficient to set in the range of 60 to 2000 mg for transfluthrin.

[Other additives]
The drug volatilization body of the present invention can contain the flying pest repellent fragrance composition, as described above, especially for the purpose of imparting a fragrance and reinforcing an insect repellent effect at an early stage of use, but additionally, the boiling point is It is in the range of 250 to 400 ° C., and it may be blended with a long-lasting fragrance component which can keep the fragrance for a longer period of time.
In this case, it is possible to link the period in which the insecticidal effect is obtained by the volatile volatile pyrethroid-type insect repellent component with the period in which the aromatic effect is obtained by the persistent perfume component, and to display the insecticidal effect display function by sensing the aroma. It is. Such long-lasting perfume ingredients include, for example, galaxolide, musk ketone, hexyl cinnamic aldehyde, ethylene brushate, methyl atralate, hexyl salicylate, tricyclodecenyl acetate, oranger crystal, ambroxane, cachemelan, caron, helio Tropine, indole aroma, indole, methyl cedryl ketone, methyl β-naphthyl ketone, methyl dihydro jasmonate, rose phenone, and 7-acetyl-1,2,3,4,5,6,7,8,8-octahydro- 1,1,6,7-tetramethyl naphthalene and the like.

  Furthermore, synergists, repellents, antibacterial agents, fungicides, other functional components, etc. can also be used at the same time. For example, as said synergist, isobornyl thiocyanoacetate (trade name: IBTA) N-octylbicycloheptenecarboximide (trade name: cinepyline 222), N- (2-ethylhexyl) -1-isopropyl-4-methylbicyclo [2,2,2] oct-5-ene-2,3- Dicarboximide (trade name: Sinepyrin 500) and the like can be mentioned.

  As the repellent agent, N, N-diethyl-m-toluamide (trade name: Dieto), dimethyl phthalate, dibutyl phthalate, 2-ethyl-1,3-hexanediol, 1,4,4a, 5a, 6,6, 9,9a, 9b-octahydrodibenzofuran-4a-carbaldehyde etc. are mentioned.

  Examples of the antibacterial agent include hinokitiol, tetrahydrolinalool, eugenol, citronellal, allyl isothiocyanate and the like.

  Examples of the fungicide include isopropylmethylphenol and orthophenylphenol.

  Examples of the other functional components include green leaf alcohol called “green scent” and stress reducing components containing green leaf aldehyde.

  Furthermore, a coloring agent (coloring pigment), an antistatic agent, etc. may be appropriately blended, and if the color is added or the time indicator can be attached so that the end point of use can be visually recognized, the commercial value is further enhanced. Can.

  The normal temperature volatile pyrethroid type insect repellent component used in the present invention has sufficient stability, but in order to further enhance the stability, it is possible to add a stabilizer such as an antioxidant, for example, 2,2'-methylenebis (4-ethyl-6-t-butylphenol), 4,4'-methylenebis (2-methyl-6-t-butylphenol), BHT, BHA, 3,5-di-t-butyl- 4-hydroxyanisole, mercaptobenzimidazole and the like can be used.

  In addition, by using an ultraviolet absorber such as paraaminobenzoic acid, cinnamic acid, salicylic acid, benzophenone and benzotriazole as an ultraviolet absorption inhibitor, light resistance during storage and use can be further improved.

[Container]
In the present invention, the drug volatilization body is stored in a storage container and used. The plastic container for containing the chemical volatilization body is not particularly limited to the shape or size as long as it can stably volatilize the pyrethroid type insect repellent component at normal temperature, but from the point of volatilization efficiency, It is preferable that the ratio of the container (opening ratio) be in the range of 10 to 50% with respect to the total surface area of the container.

  In addition, if the area of the opening is in the above range, the opening may be opened not only on the front and back of the container but also on the side, top, and bottom. Above all, if an opening is provided also on the side surface, the flow of air in the storage container becomes efficient, which is preferable. Further, the shape of the opening is not particularly limited.

  The shape of the plastic container is also not particularly limited. If the resin carrier has a cylindrical shape, the container may be made cylindrical corresponding to this, for example, when applied for mounting an air purifier. Can be used by simply simplifying the container and holding the resin carrier.

  Examples of the structure of the plastic container include one obtained by bending a flat sheet-like plastic member, an integrally molded product of plastic, and the like.

  In the case where the flat sheet-like plastic member is folded, the container is assembled such that two folded members are used as a set, and the folding surfaces of the respective members overlap.

  Furthermore, a cut-out tongue portion may be provided at the end of the bent surface of the bent member, and the hook may be extended so as to be able to be folded and raised. In this case, a storage window for folding the hook portion may be provided on the upper rear side. This enables usage depending on various usage methods.

  That is, when the tip end portion of the hook portion shown here is locked to, for example, the upper surface portion of the above-mentioned container, the container is blown off by wind when it is used outdoors, or when it is hung indoors There is no problem such as accidental drop, and you can expect a certain effect in the place you want to use.

  Next, although the molding method does not matter as long as the plastic integrally molded product is a molded product by ordinary injection molding or vacuum molding, etc., the upper surface and the lower surface, and the front surface and the back surface are integrated using a hinge. By integrating them together, the manufacturing process can be further simplified. Further, in this case, when the hook portion is provided to be able to be raised on the upper surface portion of the container, it can be used more effectively.

  That is, as in the case described above, when the tip end portion of the hook portion shown here can be locked to a part of the container, for example, an opening or a recess provided on the upper surface at the time of use, When the container is blown away by wind or suspended indoors, there is no problem such as accidental drop during use, and a reliable effect can be expected in the place where it is desired to be used.

  Further, which part of the container is to be locked is an item appropriately selected when manufacturing, but if locked on the same surface as the surface on which the hook portion is provided, the container is installed from the installation position at the time of use Since it can prevent moving, it is preferable.

  Various plastic materials such as polyethylene terephthalate, polyethylene, polypropylene, polybutylene terephthalate, nylon, polyamide, etc. can be used as the plastic material used for these flat sheet-like plastic members and integrally molded products of plastic. In view of its properties, it is preferable to use polyethylene terephthalate (PET) or polybutylene terephthalate (PBT).

  In addition, although various types of these plastics can be used, it is preferable to use one having a thickness of 0.05 to 2 mm in view of the shape of the resin carrier, the relationship with its volatilization performance, and economic efficiency. preferable.

[Storage bag]
The drug volatilization body of the present invention is generally stored in a storage container, stored in a drug impermeable film bag, marketed, and opened for use. Of course, only the drug volatilization body may be contained in a drug impermeable film bag and marketed, and the drug volatilization body removed from the bag at the time of use may be loaded into the storage container. Here, as the material of the drug impermeable film bag, polyester (PET, PBT, etc.), polyamide, polyacetal, polyacrylonitrile, etc. may be mentioned, and the thickness thereof is determined within a range that does not impair the flexibility. In addition, in order to provide heat sealability, the inner surface of these drug non-permeable films can also be laminated with polyethylene, a polypropylene film, or the like.

[Use]
The drug volatilization body prepared according to the present invention is a living room, a Japanese room, a room such as an entrance, a warehouse, a restaurant, an inside of a factory, a work place or its entrance for a predetermined period according to its design specifications immediately after use until approximately 365 days. , Chicken stalls, pig stalls, pet kennels such as kennels, rabbit huts etc., inside septic tanks and manholes, inside and outside of tents in camping etc., outdoor activities places such as barbecues, fishing, gardening etc. It exerts an excellent insect repellent effect against mosquitoes such as Culex pipiens, Culex pipiens, Aedes albopictus, pufferfish, chrysalis, flies, butterflies and moths. In addition, in places such as windows or verandas that separate indoors and outdoors, for example, hooking the hooks to a curtain rail or hanging them on a clothesline effectively prevents these pests from invading from the outdoors. It is also very practical.

  Furthermore, the drug volatilization body may be formed into a cylindrical shape to be used for attaching a pet dog lead, or the container may be appropriately simplified and used for attaching an air cleaner or the like.

[Characteristics of drug volatilization body]
The drug volatilization body of the present invention can be stably manufactured in quality by having the above-mentioned configuration.

Next, the drug volatilization body of the present invention will be described using examples. The embodiments described below are merely examples embodying the present invention, and do not limit the technical scope of the present invention.
First, the agents used and the method of evaluating the performance will be described.

<Used drug>
・ Metofluthrin (Sumitomo Chemical Co., Ltd. product: Eminence)
・ Transfluthrin (Sumitomo Chemical Co., Ltd. product: Biothrin)
・ Profluthrin (Sumitomo Chemical Co., Ltd. product: fair retail)
Microcrystalline silica (manufactured by EVONIK: Carplex # 80, white carbon, average particle size: 15 μm, hereinafter referred to as "silica")
Ethylene-vinyl acetate copolymer (manufactured by Tosoh Corp .: Ultracene 710, ethylene: vinyl acetate unit ratio = 72: 28, hereinafter referred to as “EVA”)
Low density polyethylene (manufactured by Asahi Kasei Co., Ltd .: Suntec LDM 6520, hereinafter referred to as "LDPEA")
Low density polyethylene (manufactured by Nippon Polyethylene Co., Ltd .: Novatec LDL J 802, hereinafter referred to as "LDPE-B")
Polyethylene terephthalate (manufactured by Bell Polyester Products Co., Ltd .: Bellpet IP121B, hereinafter referred to as "PET")

<Measurement of water retention ratio>
After immersing the obtained drug volatilization body in water for 3 minutes, it was slowly pulled up, and the water retention ratio was calculated by the following equation.
Water holding ratio = (weight of water attached to drug volatilization body) / (weight of drug volatilization body)

<Measurement of volatilization before and after water retention ratio test>
The obtained drug volatilization body was volatilized in a room at 25 ° C. for 1 day under the condition of a wind speed of 1 m / sec, the amount of the active ingredient contained in the drug volatilization body was measured by gas chromatography, and the volatilization amount was calculated. Furthermore, after the above-mentioned water retention ratio measurement test, it was volatilized for 2 days under the same conditions immediately, the amount of chemical volatilization for 2 days was calculated, and it converted into one day. The amount of chemical volatilization before and after the water retention ratio test was compared to investigate the relationship with the water retention ratio.

(Examples 1 to 4, Reference Examples 1 to 4 , Comparative Example 1)
<Method for producing resin pellet>
After heating 10 parts by weight of the normal temperature volatile pyrethroid insect repellent component described in Table 1 to 50 ° C. and supporting 6 parts by weight of silica, 40 parts by weight of EVA and 44 parts by weight of LDPE-A are added thereto. Technobel product: The mixture was kneaded and extruded at 120 to 140 ° C. using a twin-screw extruder to produce a resin pellet having a diameter of 3 mm and a length of 5 mm at room temperature and capable of volatilizing pyrethroid insect repellent component.

<Manufacture of molded body>
After kneading 100 parts by weight of the above-mentioned normal temperature volatile pyrethroid insect repellent component-containing resin pellet and 300 parts by weight of LDPE-B (including 10 parts by weight of colorant pellet) at 120 to 140 ° C., the mixture is introduced into an injection or extrusion molding machine. The chemical volatilization body which consists of the planar net ( Reference Examples 2 to 4 ) shown in and the three-dimensional structure (Examples 1 to 4 and Reference Example 1 and Comparative Example 1) shown in FIG. 2 was obtained.
The weight, size, and area of the minimum mesh of the drug volatilizer are as shown in Table 1.
The water retention ratio and the amount of volatilization before and after the water retention ratio test were measured based on the above method using the obtained drug volatilization body. The results are shown in Table 1.

(Example 5 , Comparative Examples 2 and 3)
Plain tissues were knitted on both sides using a PET processed yarn as a drug-impregnated body, and the both sides were connected with a twisted filament to produce a three-dimensional structure (knitted fabric) of the size shown in Table 1.
The weight, size, and area of the minimum mesh of the three-dimensional structure are as shown in Table 1.
A chemical solution prepared by dissolving the room temperature volatile pyrethroid type insect repellent component in the amount described in Table 1 in 0.25 g of acetone was retained in the three-dimensional structure. The water retention ratio and the amount of volatilization before and after the water retention ratio test were measured based on the above method using the obtained drug volatilization body. The results are shown in Table 1.

As a result of the test, the embodiment of the present invention in which the water retention ratio is in the range of 0.005 or more and 0.5 or less, the reduction degree of the insecticidal component volatilization amount is small immediately after the water holding ratio test. The effect of was slight. As can be seen from the results of Reference Example 1 and Example 5 , in the case of a three-dimensional structure having a small mesh area or in the case of using a twisted filament, the water retention ratio tends to be high.
On the other hand, in Comparative Examples 1 to 3 in which the water retention ratio exceeds 0.5, the volatilization amount immediately after the water retention ratio test was remarkably suppressed, and the reduction of the insect repellent effect was apprehended.

  The present invention can be used for a long time in the field of pest control using a drug volatilization body.

Reference Signs List 1 planar net 2 three-dimensional structure 21 rectangular corrugated body 21 a first top 21 b second top 22 reinforcement

Claims (1)

In a drug volatilization body comprising a structure having a mesh comprising a fibrous material containing a room temperature volatile pyrethroid insect repellent component,
The fibrous material comprises resin filaments,
The size of the mesh is 20 mm ² or more and 200 mm ² or less,
The mesh, Ri planar or three-dimensional shape der,
The difference between the volatilized amount of the insect repellent component (mg / day) before immersion in water for 3 minutes and the volatilized amount of the insect repellent component (mg / day) after immersion in water for 3 minutes is 0.2 mg / day drug volatilization body which is characterized in der Rukoto not more than 0.6mg / day.

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