KR820001172B1 - Insecticide heating device - Google Patents

Abstract

A compn. which generates heat upon contact with O is placed in a container with an opening sealed with an O-permeable material, and the outer surface of the container coated with a pesticide. Thus permethrin was impregnated in paper and the paper placed on the exterior bottom surface of an iron container. In the container 40g of a mixt. contg. anhd. Na2S 2, c black 1, and cermiculite 1 parts was placed through an opening which was then plugged. The whole container was packed in a Al foil-polyethylene film bag which was airtight. When the bag was oepned, heat of the container reached 250≰C and > 95% of the permethrin was volatilized in 15 min.

Description

Heating divergence

1 to 3, 9 and 10 are cross-sectional views of the heat dissipating body of the present invention.

4 to 7 are perspective views before sealing of the heat dissipating body according to the present invention.

8 is a cross-sectional view along the line A-A 'of FIG.

11 is a perspective view of the heat dissipation (in use).

The present invention relates to a novel heating emitter for extinguishing harmful living organisms, and in more detail, a heat generating composition that generates heat by contacting oxygen (air) is used as a heating source. It relates to a heat dissipating agent.

Like conventional smokers or heated fumigants, heat dissipating agents for controlling harmful organisms include heat dissipating harmful biologics (hereinafter referred to as effective drugs) as combustors, oxidizing agents, and stabilizers. It is compounded as such, and when used, it ignites and dissipates the effective drug in the atmosphere by the combustion temperature.

However, in such a divergence method by combustion, the divergence temperature of the active drug varies depending on the active ingredient, and although the optimum temperature is present in each of the active drugs, the temperature is generally high, and the control is performed. It is very difficult, and therefore, the effective drug is decomposed by heat and its effect is reduced.

Therefore, in order to prevent thermal decomposition of the effective drug, it is necessary to select an effective drug that can withstand the combustion temperature of the combustion agent or to use a combustion agent or a combustion regulator which is burned at a lower temperature, but in the end, temperature control is insufficient. Furthermore, there is no fundamental solution such as generation of harmful gas and price increase.

In addition, the use of a fire source may cause a fire or burn, and may cause a problem in terms of safety.

Moreover, although the heat-dissipating body using electricity is also known, the place used is limited to the place where electricity is used, and wide use is impossible.

As a method of solving the problem of the conventional heat dissipating member described above, a method of volatilizing an effective drug by heat generation of a chemical heating agent has recently been proposed, and a certain degree of solution has been solved.

However, the divergence of an effective drug is not sufficient as the heat dissipating agent using the heat generating agent conventionally proposed.

The heating agent proposed in the related art requires the presence of oxygen and a large amount of water at the start of the heat generation and its continuity. Therefore, the operation at the time of use is complicated, and the calorific value is considerably higher than that of the heat generating composition used in the present invention. Since it is low, in the case of the fume and heat fumigation in a short time, the active agent has a drawback that is difficult to sufficiently dissipate, it is not designed to efficiently transfer the heat of the heat generating agent to the effective drug.

SUMMARY OF THE INVENTION The present invention solves the above-described drawbacks of the present invention, and starts to generate heat only by contacting with oxygen in the air, and generates heat for a long time without applying water or the like, and furthermore, the exothermic temperature can be arbitrarily controlled from low to high temperature. It is a novel heating emitter consisting of a pyrogenic composition and an effective drug.

Next, the present invention will be described in detail.

The effective agent used in the present invention may be any one as long as it is dissipated by heating, and may be an insecticide, an attractant, a repellent, an insecticide, an insecticide, a fungicide, or the like. Organophosphorus agents such as pyrethroids such as phthalinsine, DDVP, phenythrothione, and diadione, organochlorine agents such as linden and chlorodene, carbamide agents, and pantosterones, As a attractant, dimethylphthalate, N, N-diethyltoamide, as a repellent, 10, 12-hexadecadiene 1-ol, amino acids, etc., as a fungicide, naramycin, tuuram, 2,3-dichloro-1,4 -Naphthoginone (dichron), chlorobenzirate, etc. are mentioned.

Various effective medicines may be used as described above. Among them, pyrethroid-based insecticides are known as insecticides having high bactericidal power and further less influence on the human body.

More specifically exemplified by the pyrethroid insecticides, 3-aryl-2-methylcyclopenter-2-en-4-one-1-yl dl-cis, trans-crysanthite (hereinafter referred to as arerin), 3-aryl-2-methylcyclopenter-2-en-4-one-1-yld-cis, trans-crysanthite (hereinafter referred to as d-cis, trans-aresrin), d-3-aryl 2-methylcyclopenter-2-en-4-one-1-yl d-trans-crysanthite (hereinafter referred to as d, d-trans-arrestin), 3-phenoxybenzyl-d-cis, Trans-cristothemite (hereinafter referred to as phenotrine), 3-phenoxybenzyl-dl-cis, trans-3- (2,2-dichlorovinyl) -2,2-dimethyl-1-cyclofurophan carboxy Light (hereinafter referred to as pelmetrin), 5-benzyl-3-furylmethyl dl-cis, trans-crysanthite (hereinafter referred to as resmetrin), and other pyrethroid-based insecticides, and these pyrethroid-based By using the pesticide of There are effective insecticidal method may be practiced.

Examples of the exothermic composition that generates heat by contact with oxygen (air) according to the present invention include (A) an alkali metal emulsion, a polyemulsion, a water emulsion or a hydrous salt thereof, and (B) (A) is a composition which has a catalytic function as exothermic by oxygen.

(A) is an emulsion of an alkali metal such as Li, Na, K, Rb, Cs, a polysulfide or a hydrate or a hydrous salt thereof, and one or two or more of them can be used alone or in combination.

As alkali metals, preference is given to Na, K, in particular Na.

They are thermally stable in the air and do not exhibit heat generation, but are mixed with a carbonaceous substance such as carbon black or the like (B) described later to generate heat in the air for the first time.

It is at least 1 sort (s) chosen from carbonaceous substance (1), iron carbide (2), activated clay (3), etc. as B component.

At home, such as exothermic, a carbonaceous substance and iron carbide are preferable.

Examples of the carbonaceous substance include carbon black, activated carbon, charcoal, coke, pitch, asphalt, gray white, and soot, and carbon black, activated carbon, charcoal and the like having high double-surface activity are particularly preferable in terms of heat generation.

This component does not interfere even if the carbonaceous substance is attached on the asbestos or the like.

Iron carbide is the inventor of the present invention first developed the manufacturing method and applied for a patent in Japan (patent elements 48-72839, 49-118644, 49-22272, etc.), which is a process of induction or non-oxidation Obtained by pyrolysis at.

Moreover, activated clay etc. can also be used individually or in combination with another B component as a B component. In addition, it is also possible to use sulfonated anthraquinone derivatives such as iron, nickel, cobalt lactate or hydrous salts thereof, or 1,8 Anthraquinone disulfonic Acid Dipotassium Salt in combination with the above components.

The particle diameters of the A and B components can be various particle diameters, but in general, the smaller the particle size, the better the exothermic effect, and the particles are used with a particle size of 10 mesh or less, but are not limited thereto.

The heat generating mechanism by the heat generating composition of the present invention is not necessarily clear, but basically, the heat of oxidation generated when the A component is oxidized by oxygen is considered to be a heat source, and at this time, the B component is thought to exhibit an oxidative catalytic function. do.

This is because, as described above, component A does not exothermic in the air alone, but is mixed with component B for the first time, and in the analysis of the exothermic reaction product, lactic acid root or thiolactic acid muscle in large amounts is used. It is also assumed to be detected.

Therefore, although the calorific value (cal / g) of the heat generating composition of this invention changes the mixing ratio of A component and B component which are heat sources, a desired calorific value can be obtained, but 10-90 weight% is preferable as A component.

If it is less than 10%, sufficient calorific value cannot be obtained, and if it exceeds 90%, the contact with B component will be bad, and the heat generation efficiency will be lowered.

The exothermic rate and the exothermic duration can be arbitrarily adjusted by changing the conditions of the contact area with air (oxygen), specifically, the particle diameter of A and B, the amount of air inflow, the type or amount of filler, and the like.

In addition, the filler (component C) has a so-called heat buffer, a function as a heat insulating agent that suppresses rapid temperature changes due to heat generation and heat dissipation, and is preferably porous, breathable and having a low specific gravity.

For example, natural fiber pieces such as wood powder, cotton linter, cellulose, synthetic fiber pieces such as polyester, synthetic resin foaming agents such as polystyrene and polyurethane, silica powder, porous silica gel, manganese, calcium lactate, sodium carbonate, barium lactate, Iron oxide, aluminum oxide, asbestos and the like.

Moreover, when shaping | molding is needed, you may add a shaping | molding adjuvant. These C components are mix | blended in the ratio of 0/100-90/10, Preferably it is 20/80-70/30 by the weight ratio of C component / (A component + B component).

As an oxygen source, air is the most convenient and inexpensive, but the purpose can also be indicated by the incorporation of other pure oxygen and a substance in which oxygen is generated by a chemical reaction.

The exothermic temperature of the exothermic composition used in the present invention can be up to about 1000 ° C., and the control of temperature and time can be arbitrarily adjusted as described above.

For example, heating is performed at a temperature of about 250 to 500 ° C. for relatively stable heat such as DDVP and diazinon, and a heat generation condition of about 200 ° C. is selected for being unstable such as a pyrethroid insecticide.

In addition, if smoked for a long time, such as cockroaches, avoiding in a place where no drug is present requires about 5 to 15 minutes of metal smoke or fumigation. By increasing the amount of heat generated by such a thing, a certain amount of effective drug is released in a short time.

In the present invention, of course, in addition to the above-mentioned effective pharmaceuticals and exothermic compositions, conventionally used pastes, coloring agents, coloring agents, stabilizers and the like can be blended.

The structure of the heat dissipating body of the present invention can be various, and an example thereof will be described with reference to the drawings.

1 to 3 are cross-sectional views of the heat dissipating body.

(1) In Fig. 1, granular, powdery or granular effective pharmaceuticals (1) and pyrogenic compositions (2) are uniformly mixed at a constant ratio, which is made of metal. Seal in a container or bag (3).

(2) In FIG. 2, the effective pharmaceutical powder 1 and the exothermic composition 2 are molded alone or mixed, respectively, which are sealed in a metal container or a bag 3.

(3) In Fig. 3, one side of the plate-like or thin-metal 4 is attached with an effective pharmaceutical agent 1 impregnated with a porous sheet such as paper or molded. On the other side, the molded object of the exothermic composition 2 is packed with an oxygen impermeable sheet 5.

The structure in which such an effective agent and a pyrogenic composition do not directly contact is preferable in terms of both safety.

In the case of (1) and (2), it is preferable to select a substance in which the active agent and the exothermic composition are not affected by each other.

In the case of (2), for example, the container preferably has a powdery or granular exothermic composition in a heat resistant container, a porous carrier impregnated with the active agent on the exothermic composition, and the effective pharmaceutical agent in a sealed container. And exposing the exothermic composition formed of the porous carrier impregnated with each other to seal each other.

In adhering or sticking, an adhesive, preferably a heat resistant adhesive, may be used.

Next, in using the structure of (3), the heat dissipating body which became a more useful structure is demonstrated.

Eventually, a heat dissipating harmful remedy layer is formed on the outer surface of the metal container with the open portion, the heat generating composition is accommodated in the container, and the heat generating composition is not passed through the open portion, and oxygen The heat dissipation body which installs the permeable filter and seals the said open part and / or the whole container with an oxygen impermeable sheet or a molded object is a preferable structure.

This heat dissipating body is demonstrated by drawing.

4, 5, and 6 are perspective views before sealing the heat dissipating body, FIG. 5 is a perspective view showing the opposite side of FIG. 4, FIG. 8 is a sectional view taken along line AA 'of FIG. 4, and FIGs. Sectional drawing of the heat dissipation body which sealed the metal container to the oxygen impermeable sheet | seat or the molded object, FIG. 11 shows the perspective view at the time of the heating firing which removed the oxygen impermeable sheet or the molded object, respectively.

In addition, it is clear from the following description that drawing is an example which showed this invention, and is not limited to this.

The heat dissipating body uses a metal container 6 having an open portion 7, but in the formation of the user group 6, hollow cylinders, square cylinders, delta cylinders, spheres, hemispheres Or the like, or a combination thereof.

The container 6 must have one or two or more open portions 7.

Although there is no restriction | limiting in particular about the magnitude | size and shape of the opened part 7, It must be able to supply the oxygen (air) required for the exothermic composition 2.

For example, it may be circular, semicircular, square, triangular, hexagonal, or the like, and may not be planar.

In addition, the size of the metal container 6 is not particularly limited, but is usually a size for accommodating the exothermic composition 2 of about 50 g.

The metal container 6 may be made of iron, stainless steel, aluminum, or the like, and may be a composite material such as a metal-inorganic material, a laminate such as a metal-heat-resistant organic material, or at least part of the metal container.

Preferably, the container 6 using the material with favorable thermal conductivity is used.

In addition, the thickness of the container 6 is not particularly limited, but is usually 0.1 to 1.0 mm, and may be about the thickness of flexible.

As a method of forming the effective pharmaceutical layer 1 as described above

(I) The impregnated in the porous carrier is adhered to the metal container 6.

(II) After the film is formed, coating the coating agent in which the effective agent is dispersed in the coating agent in which the effective agent dissipates rather than the coating, etc., and the required amount of the active agent generates heat in the heat generating composition (2). Any method that is formed to be divergent by can be used.

The method of (I) is heat-resistant, and the impregnated with the effective pharmaceutical agent is bonded to the container in which the effective chemical agent is stably maintained, and which can effectively dissipate upon dissipation. May be impregnated).

Examples of the porous carrier include pulp plates, glass fibers, asbestos, porous resins, paper, platelets, porous metals, and the like.

The shape and thickness of the porous carrier are not particularly limited. Preferably, the thickness of the porous carrier is 2 mm or less, and the carrier layer has an average thickness of 2 mm or less.

Of course, the thickness can be changed in accordance with the type of effective drug.

If the thickness is 2 mm or more, it is not necessarily clear, but since the heat transfer to the effective drug which is lower than the exothermic composition is not sufficient, and the rapid dissipation of the active drug tends to be inhibited, the divergence rate is lowered and the effective drug is reduced. It is a case where a decomposition rate becomes high.

Moreover, as a shape of a porous carrier, it is a plate shape of one sheet, the aggregation of many small plate shapes, and the like.

Again, the area of the porous carrier layer is preferably 10 to 500 cm 2.

Adhesive to the porous carrier layer is usually used.

Any adhesive can be used as this adhesive, provided that no carrier drop occurs during transport, transportation, or effective drug dissipation of the heat dissipating agent.

The adhesive itself can be used as long as it does not drop off even when carbonized or degraded by heat.

In addition, it is not preferable that toxic gas or odor gas are generated by heat.

As the adhesive, any of an organic compound and an inorganic compound is applied, and for example, an epoxy resin system, a silicone system, water glass, and the like.

As the method of (II), it is necessary to coat the outer surface of the metal container with the coating agent containing the effective agent, or to form a method in which the effective agent can be heat-dissipated at least in the coating film after coating.

As these formation methods, the coating agent etc. which become a porous film are preferable.

It is also effective to use a substance which forms a film at room temperature and becomes a dissipation medium for facilitating the dissipation of the effective drug during heat dissipation, for example, paraffin wax, lanolin, petratam and the like.

In addition to the effective pharmaceutical agent, other components such as a dispersing aid may be added to the effective pharmaceutical agent layer of the present invention.

Examples of the divergence aid include a potentiator such as S-421, MGK 264, fibronilonibutoxide, and cynephiline 500, a penetrating agent which helps the effective drug to be absorbed by harmful organisms, and an antioxidant.

These dispersing aids are appropriately selected depending on the type of active agent, but isopropyl myristate as a pyrethroid-based penetrant and 2, 6-di-tert-butyl-4-methylphenol as an antioxidant (2, 6-di-tert-butyl-4-methylphenol (BHT), erythorbic acid, n-propyl gallate and the like.

The exothermic composition disclosed in the present invention is brought into contact with the inner surface of the container 6 due to thermal efficiency in storage in the metal container 6.

It is particularly desirable to consider thermal efficiency where at least an active pharmaceutical layer is present.

The open portion 7 of the metal container is provided with a filter 8 which prevents leakage of the exothermic composition 2 and introduces oxygen (air).

This filter 8 is air permeable and must pass the heat generating composition 2 further.

In addition, a material having heat resistance is preferable.

As this filter 8, inorganic fibers, such as glass fiber, carbon fiber, island surface, ceramic fiber, and metal fiber, organic fiber, such as polyamide resin, polyimide resin, are used, and polyester fiber, when heat resistance is not high in demand. It can be used as such.

As the filter 8, not only one layer but also two or more lamination types are applicable. For example, the metal mesh 9 is laminated for the strength reinforcement using a fiber for breathability composition and leakage prevention.

The ventilation amount of the filter 8 varies depending on the exothermic composition 2 and the like, but is about 10 to 50 seconds / 100 ml (by densimeter).

The metal container 6 in which the exothermic composition 2 is accommodated inside and the effective pharmaceutical layer 1 is formed on the outside is sealed to be oxygen (air) impermeable.

As a sealing method, the whole container may be made of the oxygen impermeable sheet or the molded body 5 (see FIG. 9), or only the filter 8 portion may be sealed (see FIG. 10).

The oxygen-impermeable sheet or the molded body 5 may be either a container or a molded body of a thin sheet-like sheet.

Examples of the material of the oxygen impermeable sheet or the molded body 5 include plastics such as polyethylene, polypropylene, polyvinyl chloride, polyvinyl chloride, polyester, nylon, polyvinyl alcohol, metal foil or plate such as aluminum or iron. This is used, and in the case of oxygen permeability, it can be laminated and used, and in the case of metal foil, it is used in combination with plastic.

The heat dissipating bodies shown in Figs. 4 to 10 are easy to handle, and furthermore have excellent insecticidal powers.

Opening of the heat dissipating body may include removing a metal container from an oxygen-impermeable sheet or a molded body, or installing an eid-open mechanism such as a glue on the heat dissipating body, and opening it by this mechanism. In the case of adhering a transparent cover film, there is a method of peeling off the cover film during use, a method of opening it by a screw opening mechanism such as a screw cap.

However, it should not inhibit the exotherm of the exothermic composition and the heat dissipation of the effective drug.

As a usage method of the heat dissipation body which concerns on this invention, the method of using a metal container as it is, the method of setting this container in the suitable holder 10, etc. are mentioned. (See Figure 11)

In addition, since the heat dissipating body of the present invention becomes a high temperature of about 100 ° C to 500 ° C at the time of its use, it is preferable that the material used for the container, packaging, and the like for supporting the active agent and the exothermic composition, as described above, preferably has heat resistance and heat insulation. For example, metal, glass cloth, asbestos, heat resistant plastics, paper, etc. are mentioned.

Again, in the above description, a method in which the exothermic composition is used as a one-component system is shown. However, in the present invention, if necessary, a two-component system may be used and mixed in use.

Next, an Example is shown. In the examples, "parts" denote parts by weight.

Example 1

(1) 5 parts of DDVP was impregnated into 20 parts of kaolin (average particle size: 10 mu) and powdered into 100 meshes.

(2) 5 parts of sodium sulfate anhydrous salts (average particle diameter: 100 micrometers), 5 parts of carbon black (16 micrometers of particle diameters), 10 parts of sodium hydrogencarbonate (average particle diameters of 100 micrometers), and 5 parts of calcium stearate (average particle diameter of 1 micrometers) were mixed.

After mixing (1) and (2), it was granulated with 10 mesh and sealed in a metal container. All of these operations were carried out in a nitrogen stream. When this was opened and heated, the heat generation temperature was 250 to 280 캜, and 95% or more of DDVP was emitted in 5 minutes.

Comparative Example 1

In Example 1, 5 parts of iron powder (average particle size: 50 mu) and 1 part of ferrous lactate were used as the heat generating composition, and the heat dissipating body was prepared in the same manner as in Example 1, and 2 parts of water were injected at the same time of opening, The exothermic temperature was from 100 to 110 ° C., and DDVP divergence was practically impossible.

EXAMPLES 2-8

In the same manner as in Example 1, the results of experiments using the active agents shown in the table and the following exothermic composition are shown in Table 1.

However, 5 times (weight) kaolin was added as an effective drug.

Comparative Example 2

In Example 2, a heat dissipating body having the exothermic composition in the same composition as in Comparative Example 1 was prepared, and two parts of water were injected at the same time of opening, and the divergence rate of athrin was required for at least 5 hours. .

Example 9

On one side of a tape-shaped aluminum foil having a thickness of 20 mu and a width of 1 cm, a sheet of paper coated with 5 g of DDVP per 1 m 2 was attached, and on the other side, 5 parts of anhydrous sodium anhydride, 5 parts of carbon black, and calcium hydrogen carbonate 10 In addition, the exothermic composition molded object which consists of 5 weight part of calcium stearate was stuck, and it sealed-packed in the bag which used as a laminated agent of aluminum foil and polyethylene.

When this was opened and heated, the exothermic temperature was 250 ° C. and 95% or more of DDVP was emitted in 5 minutes.

Example 10

A pulp plate (area 50 cm 2) of various thicknesses was impregnated with 500 mg of d, d-trans-arrestrin and sealed in a metal container in the same manner as in the exothermic composition as in Example 1.

All of these operations were carried out in a nitrogen stream.

This was opened and exothermic, and the dissipation rate and decomposition or residual rate were measured. The results are shown in Table 2.

In addition, the divergence time was 15 minutes. The exothermic temperature is around 250 ° C.

Example 11

Table 3 shows the results obtained by impregnating 500 mg of various pyrethroid insecticides into glass fibers having an area of 33 cm 2 and a thickness of 1 mm, and measuring the divergence rate using various pyrogenic compositions.

In order to obtain the required exothermic temperature, the exothermic composition to be used was used by changing the molding conditions.

Example 12

A pesticide mat is prepared by impregnating a predetermined amount of various pyrethroids into a pulp plate having an area of 50 cm 2 and a thickness of 0.5 mm.

Using the pyrogenic composition shown in Example 11, the results of the effect test for cockroaches in a room of 3 pyeong is shown in Table 4.

Example 13

As shown in FIG. 4, 500 mg of Pelmetrin was impregnated into a paper of 0.5 mm thickness and a size of 90 × 90 mm on the outer bottom of a box-shaped container (100 × 100 × 20 mm) of 0.12 mm thick iron plate. Bonded with an adhesive.

Next, this container was filled with 40 g of an exothermic composition, which was mixed in a ratio of 2 parts of anhydrous sodium anhydride, 1 part of carbon black and 1 part of burmecite (average particle size 500μ) in a nitrogen stream, in an open part. It was sealed with a Rockwell having a thickness of 5 mm, fixed with a 10-mesh iron mesh on the Rockwell, and then sealed in a bag of an aluminum foil-polyethylene composite film.

The heat dissipating body was opened, placed in a holder as shown in FIG. 11, and the heat dissipation of Pelmetrin resulted in an exothermic temperature of 250 deg.

Example 14

Instead of the paper of Example 13, a pulp plate having a thickness of 0.5 mm and 500 mg of d, d-trans-arrestrin were used in place of Pelmetrin, and other conditions were heat-dissipated in the same manner as in Example 10. More than 95% divergence in 15 minutes.

Example 15

In place of the exothermic composition and the active drug of Example 13, the following three exothermic compositions and the active drug were used, and the other conditions were the same as in Example 13, and heat-dissipated. The exothermic temperature was (1) 250 ° C., It became (2) 250 degreeC, (3) 300 degreeC, and all diverged 65% or more in 15 minutes.

Example 16

As shown in FIG. 6, 100 mg of wax and 400 g of aresrin were mixed with xylene on an outer bottom of an aluminum container having a thickness of 0.15 mm (diameter of 130 mm x height of 15 mm) to apply a thickness of 100 µ. .

Next, in the same manner as in Example 13, 30 g of the exothermic composition was filled, and a glass fiber filter (thickness 3 mm) was attached to the open portion, and the open portion was opened by an aluminum lid having this easy-open mechanism. It sealed with the 製罐 用 卷 締 機.

It was opened by this easy-open mechanism and heated and diverged, and it was 95% divergent in 15 minutes.

Example 17

A 0.5 mm thick circular pulp plate (diameter of 10 mm) was impregnated with 100 mg of DDVP, and then adhered to the same container as in Example 16 with an adhesive of water glass system. , 1 part of alumina was used, and the others were produced in the same manner as in Example 16.

The heat dissipation was carried out to the bar heat generation temperature of 350 ° C., and 95% or more was emitted.

Reference Example 1

The efficacy test for cockroaches was carried out in three square rooms using the heat dissipating bodies of Examples 13, 15 and 17, and the insecticide rate was 100% in 10-25 minutes.

Reference Example 2

Using the heat dissipating bodies of Examples 14 and 16, the efficacy test for flies was carried out in the same manner as in Reference Example 1, and the insecticidal rate was 100% in about 10 to 15 minutes.

Claims (1)

Heat-dissipative pest control agent impregnated with a pyrethroid-based porous carrier layer having a thickness of 2 mm or less and the following (A) and (B): (A) at least one selected from emulsions, polysulfides, hydrates and hydrous salts of alkali metals selected from sodium and carium (B) at least one selected from (1) carbonaceous material, (2) iron carbide, and (3) activated clay selected from carbon black, activated carbon, charcoal, coke, pitch, asphalt, crushed and soot Consisting of a pyrogenic composition, again comprising (C) an additive, wherein (C) the additive is a natural fiber, synthetic fiber, synthetic resin foam crumb, silica powder, porous silica gel, barium lactate, iron oxide and aluminum oxide (A) is 10-90 weight% of exothermic compositions, and the additive of said (C) is 20/80-70/30 by the weight ratio of (C) / (A) + (B) The heat dissipating harmful agent control layer is formed on the outer surface of the metal container with the vent part, and the exothermic composition of (A) and (B) is accommodated in this container, and the said open part Do not let the pyrogenic composition pass through, and install a filter that transmits oxygen And the open portion and / or the whole container is sealed by an oxygen impermeable sheet or a molded body.

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