JP6013119B2 - Drug volatilizer - Google Patents

Description

  The present invention relates to a chemical volatilizer for controlling and repelling flying insect pests such as mosquitoes and flyfish, and more specifically, a three-dimensional mesh made of a fibrous material and containing a room temperature volatile pyrethroid insect repellent component. It relates to a chemical volatilizer.

DESCRIPTION OF RELATED ART Conventionally, the insect repellent which exterminates and repels a pest by volatilizing a room temperature volatilizing insect repellent in the air is known.
For example, Patent Document 1 discloses a chemical volatilization body using a plurality of nets made of twisted yarns impregnated with an insect repellent component.
Patent Document 2 discloses a molded article for controlling pests in which a plurality of grooves are formed on the surface of the resin molded body at intervals of 300 μm or less to prevent sticking of the pest control active ingredient.

Japanese Patent Laid-Open No. 2001-200299 JP 2009-19015 A

  By the way, these insect repellents are often used suspended from windows or entrances, but in this case, the insect repellents may be disturbed or unsightly. For this, a method of reducing the presence of the insect repellent by reducing the overall size of the insect repellent or reducing the thickness can be considered.

  However, the chemical volatilizer described in Patent Document 1 basically comprises a flat mesh made of a resin that is non-adsorptive to insect repellent components such as polyethylene terephthalate (PET). Although the yarn is impregnated, it is only attached or impregnated near the surface of the yarn. Therefore, when the twisted yarn is cut into a cross section, depending on the shape of the 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 rate of the insect repellent component is extremely high. fast. For this reason, even if a relatively high insect repellent effect can be exhibited in the initial stage of use, it has not been able to sufficiently cope with a long-term use of up to 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 light when used outdoors, and the decomposition loss of the insect repellent component is unavoidable.

  On the other hand, since the pest control molded article described in Patent Document 2 is carried in a state where the pest control active ingredient is kneaded in the resin carrier, the pest control active ingredient is compared with the chemical volatilization product described in Patent Document 1. It has the feature that it can be stabilized by suppressing the volatilization rate of the. However, this volatilization rate has a surface that is influenced by the flow of air. Moreover, since it does not have a three-dimensional mesh structure, the volatilized surface area of the pest control active component is small and the control effect tends to be inferior.

  In view of the above-described conventional problems, the present inventors have developed a chemical volatilization body comprising a resin filament obtained by kneading and molding a room temperature volatile pyrethroid insect repellent component into a resin carrier, or a resin in advance. In a drug volatilized body in which a three-dimensional structure formed by twisting filaments to form a three-dimensional mesh is impregnated with a room temperature volatile pyrethroid insect repellent component, attention was paid to the flow of air inside the drug volatilized body and intensive studies were conducted. That is, an object of the present invention is to provide a drug volatilizer having a structure in which the air flow inside the drug volatilizer is improved and the air easily flows.

The present invention has been found that the following constitution has an excellent effect for achieving the above-mentioned object.
(1) A drug volatilized body composed of a three-dimensional structure having a three-dimensional mesh composed of a fibrous material containing a room temperature volatile pyrethroid insect repellent component, wherein the three-dimensional structure has a porosity of 70 to 99%. The chemical volatilization body.
(2) The fibrous material is made of a resin filament, and the cross-sectional shape of the resin filament is an elliptical shape or a polygonal shape. The shortest diameter among the diameters of the resin filament cut into a cross-section and passing through the center of gravity. (2), wherein the shortest diameter is 0.3 to 3.0 mm.
(3) The chemical volatilizer according to (2), wherein the resin filament is formed by kneading the room temperature volatile pyrethroid insect repellent component into a resin carrier and then molding the resin filament.
(4) The chemical volatilization product according to (2), wherein the fibrous material is obtained by twisting resin filaments and impregnating the room temperature volatile pyrethroid insect repellent component.

  Since the chemical volatilization body of the present invention has the void ratio of the three-dimensional structure to be within a predetermined range, the flow of air in the chemical volatilization body is improved, and the chemical volatilization from the fibrous material constituting the three-dimensional structure is performed. Diffusion can be made easier.

(A) Perspective view showing an example of a three-dimensional structure, (b) (a) front view, (c) (c) cross-sectional view of (b) (A)-(c) The figure which shows the cross-sectional shape of the filament concerning this invention

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

[Room-temperature volatile pyrethroid insect repellent]
As said normal temperature volatile pyrethroid type insect repellent component, it has the property to volatilize in the air at normal temperature, and the vapor pressure in 25 degreeC is about 0.001 Pa or more and 0.1 Pa or less. Specific examples include at least one of metofluthrin, profluthrin, transfluthrin, and empentrin from the viewpoints of volatilization performance and safety. These insect repellent components have various optical isomers or geometric isomers, and any isomer can be used alone or in a mixture.

[Fibrous material]
The said fibrous material says what was comprised by the fiber form, and the thing etc. which twisted the long fiber (filament) itself, the long fiber or the short fiber, and were made into the fiber form etc. are mention | raise | lifted. In this invention, it is preferable to use long fibers (filaments), and particularly when using resin-made long fibers (resin filaments) obtained by molding using a resin composition containing a resin carrier described later as a material, Durability is high and preferable.

  In the present invention, the resin filament contains the room temperature volatile pyrethroid insect repellent component. As a method for containing this room temperature volatile pyrethroid insect repellent component, the resin carrier described below is kneaded with this room temperature volatile pyrethroid insect repellent component to prepare a resin composition described later, and then molded to obtain a resin filament, First, a resin composition described later is molded to obtain a resin filament, then, the resin filament is twisted to form a three-dimensional mesh, and the room temperature volatile pyrethroid insect repellent component is impregnated.

  As a method for molding the resin composition described later, the resin composition is extruded or injection molded to obtain a resin filament, and then a three-dimensional mesh is formed, or the resin composition described later is directly formed by injection molding or the like. And a method of forming a three-dimensional mesh having resin filaments.

[Resin composition]
The resin composition is obtained by kneading a resin carrier with a fine powder carrier and another resin carrier as necessary. In addition, it is preferable on efficiency that this resin composition is once molded into pellets and then subjected to the above molding.

[Resin carrier]
The resin carrier is somewhat different depending on whether a room temperature volatile pyrethroid 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 gradually bleed and volatilize on the surface. For example, a polyolefin such as a polyethylene resin or a polypropylene resin And resins formed by polymerizing monomers such as carboxylic acid esters. Here, the monomer such as carboxylic acid ester is effective for controlling volatilization of the insect repellent component from the surface of the resin carrier. For example, methyl acrylate, ethyl acrylate, methyl methacrylate, methacrylic acid Examples include ethyl and vinyl acetate.

  In addition, since the blending ratio of these carboxylic acid ester monomers with respect to the polyolefin-based resin generally tends to slow the bleed speed of the insect repellent ingredient as the carboxylic acid ester monomer blending ratio increases, the insect repellent component to be used What is necessary is just to adjust suitably in the range of 1-30 mass% with respect to polyolefin resin according to the kind and content of this, or the intended purpose.

  The resin carrier may be a polymer blend in which a polyolefin copolymer containing a large amount of a carboxylic acid ester monomer and a homopolymer of an olefin are mixed in an adjusted ratio. Furthermore, other polymer compounds such as a styrene-based thermoplastic elastomer can be contained as necessary.

In the present invention, an ethylene-vinyl acetate copolymer is suitable from the viewpoint of performance and usability, and the number ratio of ethylene units and vinyl acetate units therein is 90:10 to 70:30. preferable. This is because if the amount of vinyl acetate units is too small, the physical properties hardly change from those of polyethylene, and the bleed adjusting effect required in the present invention can hardly be expected. On the other hand, when there are too many vinyl acetate units, it becomes difficult to mold into resin pellets.
The ethylene-vinyl acetate copolymer preferably has a melt mass flow rate (MFR) of 5 g / 10 min or more and 50 g / 10 min or less. If the MFR is too small, the effect as a bleed adjusting agent cannot be expected, and if the MFR is too large, the influence on the physical properties of the resin pellets cannot be ignored.

On the other hand, in a chemical volatilizer of the type impregnated with a room temperature volatile pyrethroid insect repellent component, as a resin carrier, a resin non-adsorptive to an insect repellent component such as polyethylene terephthalate (PET) or polybutylene terephthalate (PBT) is usually used. Generally used for the subject.
An insect repellent component is supported on the surface of a resin carrier that constitutes a three-dimensional mesh and is used for volatilization. The resin carrier is prepared by blending such a resin such as a polyolefin resin, a styrene thermoplastic elastomer, or rayon with the resin. It can be modified to adjust the volatility of the insect repellent component.
Hereinafter, the chemical volatilization type of the type into which the room temperature volatile pyrethroid insect repellent component is kneaded will be described in detail.

[Fine powder carrier]
The fine powder carrier used in the present invention is a component added to support a room temperature volatile pyrethroid insect repellent component in a resin pellet. Examples thereof include microcrystalline silica called so-called white carbon, fine powdered silicic acid, diatomaceous earth, zeolites, viscous minerals, wood powder, and the like.

  As for the size of the fine powder carrier, the number average particle diameter is preferably 1 μm or more and 30 μm or less, and more preferably 5 μm or more and 20 μm or less. When the number average particle diameter exceeds 30 μm, the surface area is insufficient even if the content is in the above-mentioned range, so that it is difficult to carry the insect repellent component as a carrier, and the resulting resin pellets are easily sticky. On the other hand, fine particles of less than 1 μm are not practical because they are difficult in practice and the physical properties greatly change.

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

[Other resin carriers]
Furthermore, in order to adjust the weight and physical properties of the resin composition, other resin carriers may be kneaded in addition to the resin carrier such as the ethylene-vinyl acetate copolymer. As other resin carriers, a polyolefin resin or a styrene resin may be contained. Examples of the polyolefin resin include polyethylene (PE), polypropylene (PP), etc., but polyethylene is preferable because of its affinity with ethylene-vinyl acetate copolymer and ethylene-methyl methacrylate copolymer. In particular, low density polyethylene, specifically, branched low density polyethylene (LDPE) and chain low density polyethylene (LLDPE) are preferable.

[Combination 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 mass%, the effect of suppressing excessive bleed 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. If the amount is too large, the resin composition pellets are used as a master batch, and the resin molded product obtained by kneading with the other resin carrier too suppresses bleeding and is the original purpose of the room temperature volatile pyrethroid. This is because the insect repellent effect due to the volatilization of the system insect repellent component may be excessively reduced. According to the present invention, by blending with 10% by mass or more and 90% by mass or less of ethylene-vinyl acetate copolymer and / or ethylene-methyl methacrylate copolymer, bleeding of resin pellets obtained can be made within an appropriate range. It becomes possible to adjust.

  The content of the fine powder carrier is preferably 10% by mass to 30% by mass and more preferably 15% by mass to 25% by mass with respect to the entire resin composition. If it is less than 10% by mass, it is too small as a fine powder carrier, and the insect repellent component cannot be supported, and there is a possibility that bleeding of the insect repellent component becomes excessive. On the other hand, when it exceeds 30% by mass, it becomes difficult to maintain the shape as a pellet when the resin composition is pelletized due to the blending ratio with the resin carrier. Moreover, since it will also be contained in the molded article using the said resin composition, when too much, the possibility of affecting the physical property of a chemical volatilization body cannot be avoided.

[Production of resin composition and pellets]
The resin composition is obtained by heating the resin carrier and kneading the room temperature volatile pyrethroid insect repellent component and, if necessary, a fine powder carrier or other heated resin carrier. And a pellet can be obtained by pelletizing this and cooling.

  The heating temperature is usually about 100 to 140 ° C., although it depends on the type of resin used in the resin carrier and the type of resin used in other resin carriers. For example, the melting point of an ethylene-vinyl acetate copolymer (manufactured by Tosoh Corporation: Ultrasen 710) described later is 70 ° C. and can be sufficiently kneaded. If the heating temperature exceeds 140 ° C. and the heating temperature is too high, the room temperature volatile pyrethroid insect repellent component may be thermally decomposed or transpiration loss, which is not preferable.

  Based on the above, as a typical composition of the resin composition, 10 mass% to 60 mass% of room temperature volatile pyrethroid insect repellent component, 10 mass% to 30 mass% fine powder carrier, 10 mass% A combination containing a resin carrier such as an ethylene-vinyl acetate copolymer of 60% by mass or less can be given.

[Mixing time of other resin carriers]
By the way, as described above, the other resin carrier may be included in the production stage of the resin composition pellets, and the resin composition pellets are molded without the other resin carriers. Then, the drug volatilization body may be obtained by diluting the pellet with the other resin carrier, kneading and molding.

  In this case, the dilution rate is preferably 1.5 times or more and the upper limit is preferably about 5 times. If the ratio is less than 1.5 times, there is no merit in the process of dilution. On the other hand, if the ratio exceeds 5 times, the content of the insect repellent component is naturally reduced.

[Drug volatilizer]
The pellet made of the resin composition is molded into a chemical volatilization body. Further, as described above, when the other resin carrier is not contained in the insect repellent component-containing resin pellets, the insect repellent component-containing resin pellets are diluted with the other resin carriers, kneaded and molded. It is good also as a chemical volatilization body.

  This chemical volatilization body is a three-dimensional structure having a shape configured by combining resin filaments into a three-dimensional mesh. As this molding method, first, the pellets are molded by extrusion molding, injection molding, or the like to obtain resin filaments, and then a three-dimensional mesh is formed, or the insect-control component-containing resin pellets are molded by injection molding or the like. There is a method of directly forming a planar or three-dimensional mesh in which a plurality of resin filaments are crossed.

  As an example of the three-dimensional mesh structure, a three-dimensional structure 1 as shown in FIGS. 1A to 1C can be given. In addition, as a shape of the chemical volatilization body which has the said mesh structure, it is not limited to these examples.

  The three-dimensional structure 1 shown in FIGS. 1A to 1C crosses the resin filaments of the rectangular corrugated body 11 shown in FIG. 2C at two peaks at substantially the right angle. It is what I did. Moreover, in the said three-dimensional structure 1, at least two top parts contained in one top part containing surface are reinforced with the reinforcing material 12 which consists of a linear rod-shaped body. The top portion-containing surface is a surface constituting the three-dimensional structure and a surface on which the top portion is disposed.

Such a three-dimensional structure 1 can increase the surface area of the resin filament existing in a certain volume. Furthermore, when the reinforcing material 12 is used, the surface area of the resin filament can be further increased, and the strength of the three-dimensional structure can be improved.
In addition, a peripheral part is suitably determined by relationship with the intensity | strength of a solid structure, a shape, an external container, etc.

[Porosity]
The porosity of the three-dimensional structure 1, that is, the content ratio of the space portion with respect to the internal volume of the three-dimensional structure 1 is preferably 70% or more. If it is less than 70%, the flow of air inside the mesh is hindered more than necessary, and there may be a problem in that the volatilization and diffusion of the drug on the mesh surface is reduced. On the other hand, the upper limit of the porosity is preferably 99%. If it exceeds 99%, there may be a problem that the strength for maintaining the three-dimensional mesh structure is insufficient.

[Cross sectional shape of resin filament]
An object of the present invention is to optimize the bleeding property in a resin carrier and to realize a shape in which an insect repellent component is hardly affected by light when used outdoors. In order to achieve these objects, the resin filament is cut into a cross section, and among the diameters passing through the center of gravity, the longest diameter is the longest diameter (a) and the shortest diameter is the shortest diameter (b). (B) must satisfy the following conditions. The “diameter” refers to the length of the figure passing.

  Specifically, the shortest diameter (b) is preferably 0.3 mm or more. When the thickness is less than 0.3 mm, the shape is close to a film shape, and it is inevitable that the bleed is excessively fast and the insecticidal component is decomposed under the influence of light. On the other hand, the upper limit of the shortest diameter (b) is preferably 3.0 mm. If it exceeds 3 mm, the tendency to suppress bleeding increases, and the size (opening ratio) of the mesh (opening) of the resin mesh, which will be described later, is narrowed, which may cause a reduction in volatilization efficiency.

  As the cross-sectional shape of the resin filament that satisfies the above conditions, the elliptical shape shown in FIG. 2A, the square shape shown in FIG. 2B, the diamond shape shown in FIG. Examples include, but are not limited to, a polygonal shape such as a rectangular shape and a trapezoidal shape. 2A to 2C, a represents the longest diameter, and b represents the shortest diameter.

  In addition, the mesh size (opening ratio) of the mesh is not particularly limited as long as the porosity is satisfied, but from the viewpoint of volatilization efficiency and air permeability, the conditions satisfying the porosity are satisfied. The content is preferably in the range of 40 to 85%, more preferably 50 to 75%.

  Further, the mesh shape of the mesh is not limited to the triangular shape shown in FIGS. 1A to 1C, and may be appropriately set such as a square, a rhombus, and a hexagon as necessary.

[Flying insect pest repellent composition]
By the way, in addition to the room temperature volatile pyrethroid insect repellent component, in addition to the room temperature volatility pyrethroid insect repellent component, the chemical volatilization body of the present invention, in particular, for the purpose of imparting a fragrance and reinforcing the insect repellent effect at the initial stage of use. In addition, a flying insect repellent fragrance composition can be contained.

  The flying pest repellent fragrance composition is a composition containing a flying pest repellent fragrance and a repellent effect sustaining component.

The flying pest repellent fragrance is one or more fragrance components selected from acetate ester compounds represented by the following general formula (I) and / or allyl ester compounds represented by the general formula (II): Examples thereof include a component containing (a) and one or more perfume components (b) selected from monoterpene alcohols or aromatic alcohols having 10 carbon atoms.
_{CH 3 -COO-R 1 (I} )
(In the formula, R ₁ represents an alcohol residue having 6 to 12 carbon atoms.)
R ₂ —CH ₂ —COO—CH ₂ —CH═CH ₂ (II)
(In the formula, 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 acetate compound represented by the general formula (I) include p-tert-butylcyclohexyl acetate, o-tert-butylcyclohexyl acetate, p-tert-pentylcyclohexyl acetate, tricyclodecenyl acetate, Benzyl acetate, phenylethyl acetate, styryl acetate, anisyl acetate, cinnamyl acetate, terpinyl acetate, dihydroterpinyl acetate, linalyl acetate, ethyl linalyl acetate, citronellyl acetate, geranyl acetate, neryl acetate, bornyl acetate And isobornyl acetate.

  Specific examples of the allyl ester compound represented by the general formula (II) include allyl hexanoate, allyl heptanoate, allyl octanoate, allyl isobutyloxy acetate, allyl n-amyloxy acetate, allyl cyclohexyl acetate. And allyl cyclohexyl propionate, allyl cyclohexyl oxyacetate, allyl phenoxy acetate and the like.

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

  The blending ratio of (a) to (b) is preferably 0.1 to 1.0 times. Within this range, a high repellent effect against flying insects was confirmed.

  As the flying insect repellent fragrance, other fragrance components such as monoterpene hydrocarbons such as limonene, monoterpene ketones such as menthone, carvone, pregon, camphor, damascon, citral, citronellal, neral, perilla Monoterpene-based aldehydes such as aldehydes, ester compounds such as cinnamyl formate and geranyl formate, phenylethyl alcohol, diphenyl oxide, indole aroma, or various essential oils containing the perfume ingredients such as jasmine oil, neroli oil, Peppermint oil, bergamot oil, orange oil, geranium oil, petitgren oil, lemon oil, citronella oil, lemongrass oil, cinnamon oil, eucalyptus oil, lemon eucalyptus oil, thyme oil and the like may be added as appropriate.

  As the repellent effect sustaining component, it is preferable to use one or more of glycol and / or glycol ether having a vapor pressure at 20 ° C. of 0.2 to 20 Pa. Conventionally, glycols and / or glycol ethers are listed as solvents in the same manner as ethanol, isopropanol, kerosene and the like, and no effect on flying pests is mentioned. Alternatively, glycol ether not only as a solvent, but also has a long-lasting effect on flying insect pest repellents, and if an aromatic flying insect repellent is used, the initial fragrance can be sustained. This is what we have learned.

  Specific representative examples of the repellent effect sustained component (including vapor pressure at 20 ° C.) include propylene glycol (10.7 Pa), dipropylene glycol (1.3 Pa), tripropylene glycol (0.67 Pa), diethylene glycol ( 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 Examples thereof include glycol monomethyl ether, and dipropylene glycol is particularly preferable.

  The blending ratio of the repellent effect continuous component to the flying insect repellent fragrance is preferably 0.2 to 10 times. In this range, it was confirmed that the repellent effect could be sufficiently maintained against the flying insect repellent.

  By the way, when mix | blending the said flying insect repellent perfume composition, about 0.2-2 times amount is suitable for the compounding ratio with respect to the said normal temperature volatile pyrethroid type insect repellent component. If the amount of the fragrance composition is small, the purpose of imparting the fragrance cannot be achieved. On the other hand, if the amount is too large, the fragrance is too strong or the volatilization of the insect repellent component may be affected.

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

[Content of room temperature volatile pyrethroid insect repellent]
The content of the room temperature volatile pyrethroid 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 used, the use environment, the use conditions, and the like. . However, in order to secure the amount of the insect repellent component necessary for the insect repellent effect and to facilitate molding after kneading the insect repellent component, it further prevents the insect repellent component from excessively bleeding on the surface of the resin carrier and causing stickiness. In order to do so, it is preferable to set it 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 exhibiting the insect repellent effect, while when the content of the insect repellent component exceeds 20% by mass. Is difficult to mold after kneading the insect repellent component, and moreover, the insect repellent component is excessively bleed on the surface of the resin carrier and is likely to cause stickiness.

  Here, if content of the said room temperature volatile pyrethroid type insect repellent component is illustrated, the quantity of about 30-1400 mg can be mention | raise | lifted corresponding to the use period of about 30-200 days.

  That is, in setting the content, although it varies depending on the type of insect repellent component used, for example, when using metfurthrin alone, the minimum volatilization amount necessary for manifesting the insect repellent effect 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 the 30th to 200th days is 30 to 700 mg for methfluthrin and 30 for proflothrin. It can be set in the range of ˜700 mg and transfluthrin in the range of 60 to 1400 mg.

[Other additives]
As described above, the chemical volatilization body of the present invention can contain the flying insect repellent composition, particularly for the purpose of imparting a scent and reinforcing the insect-repellent effect in the initial stage of use. You may mix | blend the durable perfume component which can maintain a fragrance over a period, for example, a galaxolide, a musk ketone, an ethylene brush rate, a methyl atrate, etc. as needed.

  Furthermore, synergists, repellents, antibacterial agents, antifungal agents, and other functional components can be used at the same time. For example, as the synergist, isobornyl thiocyanoacetate (trade name: IBTA) N-octylbicycloheptenecarboximide (trade name: sinepiline 222), N- (2-ethylhexyl) -1-isopropyl-4-methylbicyclo [2,2,2] oct-5-ene-2,3- And dicarboximide (trade name: Sinepirine 500).

  Examples of the repellent include N, N-diethyl-m-toluamide (trade name: Diet), dimethyl phthalate, dibutyl phthalate, 2-ethyl-1,3-hexanediol, 1,4,4a, 5a, 6, 9,9a, 9b-octahydrodibenzofuran-4a-carbaldehyde, p-menthane-3,8-diol and the like.

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

  Examples of the antifungal agent include isopropylmethylphenol and orthophenylphenol.

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

  In addition, colorants (color pigments), antistatic agents, etc. may be added as appropriate. Adding color or attaching a time indicator to make the end of use more visible increases the commercial value. Can do.

  The room temperature volatile pyrethroid insect repellent component used in the present invention has sufficient stability, but in order to further improve the stability, it is also 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, etc. can be used.

  Further, by using ultraviolet absorbers such as paraaminobenzoic acids, cinnamic acids, salicylic acids, benzophenones and benzotriazoles as ultraviolet absorption inhibitors, the light resistance during storage and use can be further improved.

[Storage container]
In this invention, a chemical volatilization body is accommodated and used for a storage container. The plastic container for storing the chemical volatilization body is not particularly limited in shape and size as long as it can stably volatilize the room temperature volatile pyrethroid insect repellent component, but from the point of volatilization efficiency, It is preferable that the ratio (opening ratio) in the container is in the range of 10 to 50% with respect to the total surface area of the container.

  As long as 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, and the shape of the opening is also particularly limited. Is not to be done.

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

  Examples of the structure of the plastic container include a bent sheet-shaped plastic member, an integrally molded product of plastic, and the like.

  When the flat sheet-like plastic member is folded, the container is assembled so that the folded surfaces of the respective members overlap with each other using the two folded members as a set.

  Furthermore, a tongue piece part with a notch can be provided at the end part of the bent surface of the bent member, and the hook part can be extended so that it can be folded up. In this case, a storage window for folding the hook portion may be provided above the back surface. Thereby, the usage according to various usage methods is attained.

  That is, when the tip portion of the hook portion shown here is locked to, for example, the upper surface portion of the container, when the container is used outdoors, the container is blown away by wind or when the container is suspended indoors. There is no problem of accidental dropping, and you can expect a certain effect at the place you want to use.

  Next, the plastic integrally molded product may be any molding method as long as it is molded by normal injection molding or vacuum molding, but the upper surface and the lower surface, the front surface and the rear surface may be integrated using a hinge. If integrated by fitting, the manufacturing process can be further simplified. Further, in this case, if the hook portion is provided on the upper surface portion of the container so that it can be raised, it can be used more effectively.

  That is, in the same manner as described above, when the tip portion of the hook portion shown here is configured to be able to be locked to a part of the container, for example, an opening or a recess provided on the upper surface, when used outdoors, When the container is blown away by wind or hung indoors, there is no problem of accidental dropping during use, and a certain effect can be expected in a place where it is desired to use.

  In addition, which part of the container is to be locked is a matter to be appropriately selected during manufacturing, but if the container is locked on the same surface as the surface on which the hook portion is provided, the container can be removed from the installation position during 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-shaped plastic members and plastic integrally molded products. In view of the properties, it is preferable to use polyethylene terephthalate (PET) or polybutylene terephthalate (PBT).

  In addition, various thicknesses of these plastics can be used, but in terms of the relationship between the shape of the resin carrier, its volatilization performance, economy, etc., it is possible to use a thickness of 0.05 to 2 mm. preferable.

[Storage bag]
The chemical volatilization body of the present invention is generally marketed after being stored in a storage container and then stored in a drug-impermeable film bag, and used when opened. Of course, only the drug volatilizer may be stored in a drug-impermeable film bag and marketed, and the drug volatilizer removed from the bag during use may be loaded into the storage container. Here, examples of the material of the drug-impermeable film bag include polyester (PET, PBT, etc.), polyamide, polyacetal, polyacrylonitrile, and the like, and the thickness thereof is determined within a range that does not impair flexibility. In order to impart heat sealability, the inner surface of these drug-impermeable films can be laminated with polyethylene, polypropylene film or the like.

[Usage]
The chemical volatilized body prepared by the present invention has a living room, a Japanese-style room, a room such as a front door, a warehouse, a restaurant, a factory, a work shop, and its entrance / exit for a predetermined period according to the design specifications from immediately after use to about 200 days. , Livestock houses such as poultry houses and pig houses, pet sheds such as kennels and rabbit huts and their surroundings, inside septic tanks and manholes, inside tents and entrances of camping, barbecue, fishing, gardening and other outdoor activities Thus, it exhibits an excellent insecticidal effect against mosquitoes such as mosquitoes, chikaeka, and mosquitoes, flyfish, chironomids, flies, butterflies, moths and the like. In addition, it is possible to effectively prevent the entry of these pests from the outside to the inside if the hook part is hooked on a curtain rail or the like, or is hung on a clothes rack in a place such as a window or a veranda that separates the room from the outside. Can also be very practical.

  Furthermore, the chemical volatilization body can be formed in a cylindrical shape for attaching a lead for a pet dog, or the container can be appropriately simplified and used for attaching an air purifier or the like.

[Characteristics of chemical volatilizer]
The chemical volatilization body of this invention can be stably manufactured on quality by having the said structure.

Next, the chemical volatilization body of this invention is demonstrated using an Example. In addition, the Example described below is only an example which actualized this invention, and does not limit the technical scope of this invention.
First, the used medicine and the performance evaluation method will be described.

<Drugs used>
・ Metfurthrin (Sumitomo Chemical Co., Ltd .: Eminence)
・ Transfluthrin (Sumitomo Chemical Co., Ltd .: Biothrin)
・ Profluthrin (manufactured by Sumitomo Chemical Co., Ltd .: Fair Retail)
Microcrystalline silica (EVONIK: Carplex # 80, white carbon, average particle size: 15 μm, hereinafter referred to as “silica”)
Ethylene-vinyl acetate copolymer (manufactured by Tosoh Corporation: Ultrasen 710, ethylene: vinyl acetate unit ratio = 72: 28, hereinafter referred to as “EVA”)
Low-density polyethylene (Asahi Kasei Corporation: Suntech LDM6520, hereinafter referred to as “LDPE-A”)
Low density polyethylene (Nippon Polyethylene Co., Ltd .: Novatec LDLJ802, hereinafter referred to as “LDPE-B”)
Polyethylene terephthalate (manufactured by Bell Polyester Products: Bellpet IP121B, hereinafter referred to as “PET”)

<Evaluation test for volatility of volatile chemicals>
The obtained chemical volatilized body was applied with a wind of about 1 m / sec in a room at 25 ° C., and the amount of active ingredients contained in the three-dimensional structure mesh on the 25th and 30th days after the start of volatilization was determined by gas chromatography. The amount of chemical volatilization per day was calculated.

Example 1
<Production method of resin pellet>
After 10 parts by weight of metfurthrin heated to 50 ° C. was supported on 6 parts by weight of silica, 40 parts by weight of EVA and 44 parts by weight of LDPE-A were manufactured by Technobel Co., Ltd. using a twin screw extruder. Kneading and extrusion molding were carried out at 120 to 140 ° C. to produce methfurthrin-containing resin pellets having a diameter of 3 mm and a length of 5 mm.

<Manufacture of molded body>
The metofluthrin-containing resin pellets 100 parts by weight and LDPE-B 300 parts by weight (including 10 parts by weight of the colorant pellets) are kneaded at 120 to 140 ° C. and then charged into an injection molding machine, and the drug comprising the three-dimensional structure shown in FIG. Volatilized product (10 g) was obtained.
The cross-sectional shape of the rectangular wavy body 11 and the reinforcing material 12 constituting the three-dimensional structure are 1.3 mm × 1.3 mm square, the shortest diameter (b) is 1.0 mm, and the longest diameter (a) / The ratio of the shortest diameter (b) was 1.4. In addition, the magnitude | size of the whole chemical volatilization body was 150 mm x 80 mm x 10 mm. And the porosity was 97%.
Using the obtained chemical volatilization body, the volatilization amount and volatilization time of the volatile chemical were measured based on the above method. The results are shown in Table 1.

(Examples 2-5, Comparative Examples 1-4)
Example 1 except that the room temperature volatile pyrethroid insect repellent component and its amount shown in Table 1 were used, and the shortest diameter (b) of the resin filament, the size of the three-dimensional structure and the porosity were as shown in Table 1. In the same manner, a chemical volatilization product was produced.
Using the obtained chemical volatilization body, the volatilization amount and volatilization time of the volatile chemical were measured based on the above method. The results are shown in Table 1.

(Example 6)
A plain structure was 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 prepare a three-dimensional structure knitted fabric. The shortest diameter of the cross section of the filament constituting this three-dimensional structure was 0.3 mm, and the size of the whole three-dimensional structure was 150 mm × 80 mm. The porosity was 81%.
A chemical solution in which 0.25 g of metofluthrin was dissolved in 0.25 g of acetone was held in the three-dimensional structure. When the volatilization amount and volatilization time of a volatile chemical | medical agent were measured based on said method using the obtained chemical volatilization body, the average volatilization amount was 3.4 mg / day and the volatilization time was 60 days.

  The present invention can be used in the field of pest control using a chemical volatilizer.

DESCRIPTION OF SYMBOLS 1 Three-dimensional structure 11 Rectangular wave body 11a 1st top part 11b 2nd top part 12 Reinforcement material a Longest diameter b Shortest diameter

Claims (3)

In the drug volatilization body composed of a three-dimensional structure having a three-dimensional mesh composed of a fibrous material containing a room temperature volatile pyrethroid insect repellent component,
Ri porosity of the three-dimensional structure is 70% to 99% der,
The fibrous material is made of a resin filament,
The cross-sectional shape of this resin filament is elliptical or polygonal,
When this resin filament is cut into a cross section and the shortest diameter is the shortest diameter among the diameters passing through the center of gravity,
The chemical volatilization body whose shortest diameter is 0.3-3.0 mm . 2. The chemical volatilizer according to claim 1 , wherein the resin filament is formed by kneading the room temperature volatile pyrethroid insect repellent component into a resin carrier and then molding the resin filament. The chemical volatilization body according to claim 1 , wherein the fibrous material is obtained by twisting a resin filament and impregnating the room temperature volatile pyrethroid insect repellent component.

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