CN103766391A - Fumigating insecticide and fumigating insecticidal device - Google Patents

Abstract

The object of the present invention is to provide a fumigant-type insecticide that is low in pollution, gives a visual sense of effectiveness to the user, and has a high volatilization rate of the insecticidal active ingredient. The solution of the present invention is to provide a fumigating insecticide, which is characterized in that it contains (A) component: insecticidal active ingredient, (B) component: polyhydric alcohol and (C) component: selected from ascorbic acid series compounds and One or more compounds in the group consisting of compounds represented by the following general formula (c1) have a mass ratio represented by ((B) component+(C) component)/(A) component of 0.5 to 3.5. Provided is a fume-type insecticide, which is characterized in that the above-mentioned fume-type insecticide is accommodated, and a heating device for heating the fume-type insecticide is provided.

Description

Fume-type insecticide and fume-type insecticide

technical field

The invention relates to a fume-type insecticide and a fume-type insecticide.

Background technique

In general households, in order to prevent harmful organisms such as flies, mosquitoes, cockroaches and other sanitation pests, molds, bacteria, etc., fumigants (fumigants) are used in spaces such as homes or vehicles for treatment.

Examples of fumigants include solid preparations whose main components are exothermic bases mixed with various combustion agents, foaming agents, etc., and active ingredients such as insecticidal ingredients and antibacterial agents. Generally, nitrocellulose, azodicarbonamide, p,p'-oxobis(benzenesulfonyl hydrazide), N,N'-dinitrosopentamethylenetetramine, etc. are used as exothermic substrates.

When in use, if the fumigant is heated, the exothermic substrate burns or decomposes to generate smoke (gas and particles), and the action of the smoke and heat will disperse the active ingredients into the air. Therefore, it is possible to flood the entire space with the active ingredient in a short time, and perform pest control and the like.

Fumigant heating, using a direct heating method of heating a part of the fumigant to burn the fumigant, and an indirect heating method of heating the fumigant to a temperature of about 150 to 450°C using the heat of hydration reaction of a heating agent such as calcium oxide Way. For example, it has been proposed to heat the smoked composition containing exothermic substrates such as azodicarbonamide and insecticidal components by indirect methods such as the hydration reaction heat of calcium oxide, and to spray out by the self-combustion of the exothermic substrate. The smoke (gas and particles generated by thermal decomposition) volatilizes the active ingredient into the space in a short time for practical use (for example, refer to Japanese Patent Documents 1-2).

On the other hand, liquid substances obtained by dissolving the active ingredient in a solvent have also been proposed as insecticides used by volatilizing the active ingredient by heating. This insecticide is housed in a device provided with a liquid-absorbent core, absorbed by the liquid-absorbent core, and the active ingredient is gradually volatilized by heating the above-mentioned liquid-absorbent core. The heating temperature is lower than that of the fumigant, usually 135° C. or lower (for example, refer to Japanese Patent Documents 3 to 4).

prior art literature

patent documents

Patent Document 1 Japanese Patent Application Publication No. Sho 58-28842

[Patent Document 2] Japanese Patent Application Publication No. Sho 59-49201

[Patent Document 3] Japanese Patent Laid-Open No. 7-69805

[Patent Document 4] Japanese Patent Laid-Open No. 2009-232915

Contents of the invention

The problem to be solved by the invention

The fumigants containing exothermic substrates such as azodicarbonamide described in Patent Documents 1 and 2 have excellent volatilization power of active ingredients, but there is a problem of contamination such as white deposits caused by generated smoke.

In addition, the types of insecticides described in Patent Documents 3 to 4, although they do not contain exothermic substrates, are less likely to cause pollution, but the volatilization of active ingredients is slow, so the active ingredients cannot be fully filled in every corner of the space. . Therefore, there is a problem that the insecticidal effect against fast-moving crawling pests such as cockroaches is insufficient. In addition, since the volatilized state of the active ingredient cannot be seen like the smoke generated by heating the fumigant, it is difficult for the user to obtain a visual sense of actual effect.

In order to solve the above-mentioned problems, the inventors of the present invention have conducted intensive studies and found that if the heat-generating base (such as azodicarbonamide, etc.) It can be seen that the same white smoke as the current fumigant can be seen, and the active ingredients of insecticide can be scattered into the whole space.

However, in this polyol-based composition, if the amount of polyol used is reduced in order to reduce contamination, it is difficult to obtain a visual effect and the volatilization rate of the insecticidal active ingredient is greatly reduced.

In view of the above circumstances, the present invention aims to provide a smoke-type insecticide that is low in pollution, provides a visual sense of effectiveness to the user, and has a high volatilization rate of the insecticidal active ingredient.

means of solving problems

The inventors of the present invention have further researched and found that, while selecting polyols to replace the exothermic substrates (azodicarbonamide, etc.) The above-mentioned problems have been solved, and the present invention has been accomplished.

That is, the smoke-type insecticide of the present invention is characterized in that it contains (A) component: insecticidal active ingredient, (B) component: polyhydric alcohol, and (C) component: selected from ascorbic acid series compounds and following general formula ( c1) represents one or more compounds in the group consisting of compounds, and the mass ratio represented by ((B) component+(C) component)/(A) component is 0.5 to 3.5.

[chemical 1]

[wherein, R ³ is -CH(OH)-CHO, -CH ₂ OH, -CH(OH)-CH ₂ OH or a hydrogen atom. m is 1 or 2. ]

In the fumigating insecticide of the present invention, the mass ratio represented by (B) component/(C) component is preferably 2 or less.

In the smoke-type insecticide of the present invention, the (A) component is preferably at least one selected from the group consisting of oxadifen, propoxur, d, d-T-cyphenothrin, phenmethrin and permethrin species of insecticidal active ingredients.

In the smoke-type insecticide of the present invention, the (A) component is at least one compound selected from the group consisting of propoxur, d, d-T-cyphenothrin, phenothrin and permethrin, and Combination of worm ketones,

(Hyfepyrone): (at least one compound selected from the group consisting of propoxur, d, d-T-cyphenothrin, phenothrin and permethrin) preferably represents a mass ratio of 4:1 ~1:2.

The component (B) in the fumigating insecticide of the present invention is preferably a dihydric alcohol.

In the fumigating insecticide of the present invention, the component (B) is preferably at least one polyhydric alcohol selected from the group consisting of propylene glycol and dipropylene glycol.

The component (B) in the fumigating insecticide of the present invention is a combination of propylene glycol and dipropylene glycol.

(Propylene glycol): The mass ratio represented by (dipropylene glycol) is preferably 1:3 to 3:1.

In the smoke-type insecticide of the present invention, the component (C) is preferably at least one compound selected from the group consisting of ascorbic acid, D-erythorbic acid, ascorbyl palmitate, glucuronolactone, and gluconolactone.

In the smoke-type insecticide of the present invention, the component (C) is preferably at least one compound selected from the group consisting of glucuronolactone and glucuronolactone.

The fumigating type insecticide of the present invention accommodates the above-mentioned fumigating type insecticide of the present invention, and includes a heating device for heating the fumigating type insecticide.

Invention effect

The present invention can provide a fumigating insecticide with low pollution, visual effect feeling for users and high volatilization rate of active ingredients.

Description of drawings

FIG. 1 is a cross-sectional view showing one embodiment of the fume-type insecticidal device of the present invention.

Symbol Description

1...Smoke-type insecticidal device, 10...Outer container, 12...Main body, 14...Cover, 16... Bottom, 20...Inner container, 30...Heating part, 40...Smoke type insecticide

Detailed ways

(fume-type insecticide)

The fumigant insecticide of the present invention comprises (A) component: insecticidal active ingredient, (B) component: polyhydric alcohol, and (C) component: selected from ascorbic acid-based compounds and compounds represented by general formula (c1). More than one compound in a group.

In the present invention, "smoke-type insecticide" refers to an agent that sprays smoke by heating, and the insecticidal active ingredient is volatilized in a short time through the sprayed smoke.

The fumigating insecticide of the present invention is heated to a high temperature of about 150-450°C during use, and the component (A) can be volatilized into the space of the treatment object in a short time. The above-mentioned heating is the same as that of the conventional fumigant, and the user can visually see the white smoke and obtain a sense of visual effect. That is, if the above-mentioned heating is performed on the fumigating insecticide of the present invention, the component (B) is vaporized, and the component (C) is thermally decomposed to generate carbon dioxide. And because the vaporized (B) component and (C) component thermally decompose the carbon dioxide vapor generated by the thermal decomposition into the room and other spaces, so a sufficient amount of (A) component can be efficiently volatilized to the treatment object in a short time In the overall space, it exerts an excellent insecticidal effect on pests. The vapor of this (B) component acts the same as the smoke of the conventional fumigant, and gives a visual effect. In addition, different from the smoke of the current fumigant, since the above-mentioned white smoke comes from the steam of (B) component, and the thermal decomposition of (C) component produces carbon dioxide, thereby suppressing the pollution of the space to be treated. The color of the smoke is not particularly limited, but white is preferred.

The fumigant insecticide of the present invention preferably does not contain a self-reactive exothermic substrate. Therefore, pollution due to white deposits can be prevented by not containing fine particles generated by combustion or decomposition of the above-mentioned exothermic substrate.

Here, the "exothermic substrate" is a component that burns or decomposes after heating, and volatilizes the active ingredient (insecticidal active ingredient) using the heat of combustion or decomposition generated thereby. For example, various substances such as organic blowing agents, exothermic agents, and combustion agents can be used, specifically, nitrocellulose, azodicarbonamide, p,p'-oxobis(benzenesulfonyl hydrazide), N,N '-Dinitrosopentamethylenetetramine, etc.

＜Component (A): Insecticidal active ingredient＞

The component (A) is not particularly limited, and can be appropriately selected from insecticidal components conventionally mixed in fumigants in consideration of the object to be controlled.

For example, typical insecticidal ingredients include, but are not limited to, oxadiazole-based compounds, carbamate-based compounds, pyrethroid-based compounds, organophosphorus-based compounds, and neonicotinoid-based compounds. Among these compounds, at least one compound selected from the group consisting of oxadiazole-based compounds, carbamate-based compounds, and pyrethroid-based compounds is preferred from the viewpoint of safety to the human body.

Oxadiazole-based compounds, for example, metoxadiazone and the like.

Carbamate compounds, for example, propoxur (Propoxur), carbaryl (carbaryl) and the like.

Pyrethroid-based compounds, such as pyrethrin, a natural insecticidal component contained in pyrethrum, a pyrethrum extract obtained by solvent-extracting dried pyrethrum flowers, or synthetic pyrethroid-like compounds (synthetic pyrethroids) may be used, As long as it is an ester compound composed of a chrysanthemic acid moiety and an alcohol moiety, it may be a natural product or a synthetic product, and it is not particularly limited. Specifically, for example, pyrethrum extract, pyrethrin (such as the trade name of Sumitomo Chemical Co., Ltd.: Pyrethrin), allethrin (Allethrin) (such as the trade name of Sumitomo Chemical Co., Ltd.: Pynamin), dl, d-T80- Allethrin (dl, d-T80-Allethrin) (such as Sumitomo Chemical Co., Ltd. trade name: Pynamin Forte), pyrethrin (such as Sumitomo Chemical Co., Ltd. trade name: Neopynamin), d-T80 - Pyrethrin (d-T80-Phthalthrin) (such as Sumitomo Chemical Co., Ltd. trade name: Neopynamin Forte), resmethrin (such as Sumitomo Chemical Co., Ltd. trade name: Crysron), d-T80 - Resmethrin (d-T80-Resmethrin) (such as the product name of Sumitomo Chemical Co., Ltd.: Crysron Forte), d-T80-furethrin (such as the product name of Sumitomo Chemical Co., Ltd.: Pynamin-DForte) , Phenothrin (such as Sumitomo Chemical Co., Ltd. product name: Sumithrin), permethrin (Permethrin) (such as Sumitomo Chemical Co., Ltd. product name: Eksmin), d-T80-phenylene ether cyanide d-T80-Cyphenothrin (such as Sumitomo Chemical Co., Ltd. trade name: Gokilaht), d,d-T-cyphenothrin (d,d-T-Cyphenothrin) (such as Sumitomo Chemical Co., Ltd. trade name: Gokilaht S), d, d-T80-proparthrin (d, d-T80-Prallethrin) (such as the trade name of Sumitomo Chemical Co., Ltd.: Etoc), EZ-enethrin (EZ-Empenthrin) (such as Sumitomo Chemical Co., Ltd. trade name: Veporthrin), imiprothrin (such as Sumitomo Chemical Co., Ltd. trade name: Pralle), transfluthrin (transfluthrin) (such as Sumitomo Chemical Co., Ltd. trade name name: biothrin), metofluthrin (eg, trade name: Eminence manufactured by Sumitomo Chemical Co., Ltd.), and the like.

The component (A) contained in the fumigating insecticide of the present invention may be one kind or two or more kinds.

Among them, from the viewpoint that the effect of improving the volatilization rate is remarkable by mixing components (B) and (C), component (A) is preferably selected from oxadiazole-based compounds such as oxadiazole-based compounds, carbamate-based At least one selected from the group consisting of propoxur among the compounds, d,d-T-cyphenothrin, phenmethrin, and permethrin among the pyrethroid compounds. Particularly preferably, at least one selected from the group consisting of propoxur, d, d-T-cyphenothrin, phenothrin and permethrin is used in combination with diafenoxone, (diamefenone): (chosen The mass ratio represented by at least one selected from the group consisting of propoxur, d,d-T-cyphenothrin, phenothrin, and permethrin) is preferably 4:1 to 1:2.

The content of component (A) in the fume-type insecticide is based on the potency of the component (A), the amount of the fume-type insecticide used in one insecticidal treatment (such as the filling amount of the fume-type insecticide device, etc. ), heating means, etc. can be appropriately set. Preferably it is 10-40 mass % with respect to the total mass of a fumigating type insecticide, More preferably, it is 21-40 mass %, More preferably, it is 21-30 mass %.

When the content of the component (A) is less than the preferable lower limit, the absolute amount of the component (A) volatilized in the space is insufficient, and the insecticidal effect may become insufficient. Even if the (A) component is mixed in excess of the preferable upper limit, the insecticidal effect hardly changes, which is not preferable from an economic point of view.

＜Component (B): Polyol＞

"Polyol" refers to a compound containing two or more hydroxyl groups in the molecule. Those containing two hydroxyl groups are called diols (diols), those containing three hydroxyl groups are called triols, and those containing two or more are collectively called diols. Polyol. Polyols have the characteristic that if heated at about 150-450°C, they can produce the same white smoke as the current fumigants.

The component (B) is not particularly limited, but it can be used in pharmaceuticals, quasi-drugs, cosmetics, miscellaneous goods, industrial products, etc. in consideration of the volatility, solubility and dispersibility of the component (A), heating temperature at the time of use, etc. Appropriate choice among substances.

The boiling point of the component (B) is preferably from 150 to 300°C, more preferably from 170 to 300°C, from the viewpoint of the volatilizable temperature of the component (A).

(B) Components include, for example, dihydric alcohol (diol), trivalent or higher polyhydric alcohol, sugar, sugar alcohol, and the like.

Among dihydric alcohols (diols), for example, a compound having such a structure: a hydroxyl group is bonded to each of the two carbon atoms of an aliphatic hydrocarbon with a carbon number of 2 or more, and an ether can be inserted between the carbon atoms of the aliphatic hydrocarbon Sexual oxygen atom (-O-).

Among the above compounds, the aliphatic hydrocarbon may be saturated or unsaturated. In addition, the above-mentioned aliphatic hydrocarbons may be chain or cyclic, preferably chain. In the case of a chain, the above-mentioned aliphatic hydrocarbon may be linear or branched. In the case of a ring, the above-mentioned aliphatic hydrocarbon may be monocyclic or polycyclic.

Such a compound is more specifically a compound represented by the following general formula (b1) or (b2).

HO-R ¹ -OH…(b1)

HO-(R ² O) _n -H...(b2)

[wherein, R ¹ and R ² are each independently a binary aliphatic hydrocarbon group with 2 or more carbon atoms, and n is an integer of 2 or more. ]

The number of carbon atoms of the divalent aliphatic hydrocarbon group in R ¹ in the formula (b1) is preferably 2-18, more preferably 2-4, even more preferably 3 or 4. R ¹ is particularly preferably propylene.

The compound represented by formula (b2) is a so-called polyether.

R ² in the formula (b2) may include the same substances as R ¹ , preferably ethylene or propylene, particularly preferably ethylene.

n is preferably 2-14, more preferably 2-4.

Compounds represented by the above general formula (b1) include, for example, ethylene glycol, propylene glycol, 1,3-butanediol, trans-2-butene-1,4-diol, 2-butyne-1,4-diol, Alcohol, 2,5-hexanediol, 2-methyl-1,3-pentanediol, 2-methyl-2,4-pentanediol, 2,3-dimethyl-2,3-butanediol Alcohol, 2,4-heptanediol, 2,2-diethyl-1,3-propanediol, 2-ethyl-1,3-hexanediol, 2-ethyl-2-butyl-1,3 - Propylene glycol, isoprene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol, 1,8- Octanediol, 1,9-nonanediol, 1,10-decanediol, 1,11-undecanediol, 1,12-dodecanediol, 1,13-tridecanediol, 1,14-tetradecanediol, 1,15-pentadecanediol, 1,16-hexadecanediol, 1,17-heptadecanediol, 1,18-octadecanediol, 1,19-nonadecanediol, 1,20-eicosanediol, 1,2-octanediol, 1,2-decanediol, 1,2-dodecanediol, 1,2- Tetradecanediol, 1,2-hexadecanediol, 1,2-octadecanediol, etc. Among them, propylene glycol is preferred.

Examples of the compound represented by the general formula (b2) include diethylene glycol, triethylene glycol, polyethylene glycol with an average molecular weight of 200 to 20,000, dipropylene glycol, tripropylene glycol, and polypropylene glycol with an average molecular weight of 300 to 2,000.

Polyethylene glycol (Polyethylene glycol) with an average molecular weight of 200-20000 is also called Macrogol (polyethylene glycol), such as polyethylene glycol 200 (average molecular weight 190-210), polyethylene glycol 300 (average molecular weight 280- 320), polyethylene glycol 400 (average molecular weight 380-420), polyethylene glycol 600 (average molecular weight 570-630), polyethylene glycol 1000 (average molecular weight 950-1050), polyethylene glycol 1540 (average molecular weight 1290~1650), polyethylene glycol 2000 (average molecular weight 1850~2150), polyethylene glycol 4000 (average molecular weight 2600~3800), polyethylene glycol 6000 (average molecular weight 7300~9300), polyethylene glycol 10000 ( Average molecular weight 9300-12500), polyethylene glycol 20000 (average molecular weight 15500-20000), etc.

As an example of the compound represented by the said general formula (b2), among these, dipropylene glycol and tripropylene glycol are preferable.

These polyethylene glycols are available from Sanyo Chemical Industry Co., Ltd., for example. Commercially available products of polyethylene glycol, such as "polyethylene glycol #1000", may have # added between polyethylene glycol and the numerical value depending on the product.

In addition, the average molecular weight of the above-mentioned polyethanol is represented by the average molecular weight described in Standards 2006 for Quasi-drug Raw Materials, and is a value obtained by the measurement method described in Standards 2006 for Quasi-Drug Raw Materials.

Polypropylene glycol having an average molecular weight of 300 to 2000, for example, having a degree of polymerization of 4 to 34, for example, commercially available products such as NewPol PP-400, PP-1000, PP-2000 (manufactured by Sanyo Chemical Industry Co., Ltd.).

In addition, the average molecular weight of polypropylene glycol is a number average molecular weight, and is a value calculated|required from a hydroxyl value.

Suitable sugars are monosaccharides such as glucose and fructose; disaccharides such as sucrose, lactose, maltose, and trehalose; and polysaccharides of trisaccharides or more.

Among the sugar alcohols, glycerin, diglycerin, polyglycerin, erythritol, xylitol, D-sorbitol, mannitol, maltitol and the like are suitable. As glycerin, diglycerin, and polyglycerol, commercially available products from Sakamoto Pharmaceutical Co., Ltd., etc. can be used, for example. Among them, glycerin and D-sorbitol are preferable.

The (B) component contained in the fumigating insecticide of this invention may be one type, or may be two or more types.

Among the above, the (B) component is preferably diol in view of the fact that heating is particularly easy to vaporize and the insecticidal active ingredient is easy to volatilize.

Among the diols, at least one selected from the compound represented by the general formula (b1) (component (b1)) and the compound represented by the general formula (b2) (component (b2)) is preferably selected from the group consisting of improving the volatility of the component (A). From the viewpoint of the diffusivity, it is more preferable to use (b1) component and (b2) component together.

When using component (b1) and component (b2) together, the mass ratio represented by the mixing ratio of component (b1) and component (b2) (b1):(b2) is preferably 1:3 to 3:1, more preferably 1:2 ~2:1.

Among the components (b1), propylene glycol is particularly preferred.

Among the components (b2), dipropylene glycol is particularly preferable.

When using (b1) component and (b2) component together, it is preferable to use propylene glycol as (b1) component, and it is preferable to use dipropylene glycol as (b2) component.

In addition, as (B) component, it is preferable to use two types of polyhydric alcohols with different boiling points from the viewpoint of further improving the volatilization rate of (A) component. As a combination of these two kinds of polyols, for example, a polyol having a boiling point higher than the volatilization start temperature of the component (A) and a polyol having a boiling point lower than the volatilization start temperature of the component (A) combination of polyols. Here, "the volatilization initiation temperature" means the temperature at which the components vaporize, that is, the boiling point.

The content of the component (B) in the fumigant insecticide is preferably 40% by mass or less, more preferably 1 to 40% by mass, and still more preferably 5 to 30% by mass, based on the total mass of the fumigant type insecticide.

(B) When content of a component is below a preferable upper limit, the balance with (C)component will become easy to be acquired. In addition, it is easy to moderately suppress the amount of generated smoke (to further reduce polluting properties). (B) When content of a component is less than a preferable lower limit, (A) component may not fully volatilize. In addition, it is difficult to obtain a sense of practical effect visually.

<Component (C): 1 or more selected from the group consisting of ascorbic acid-based compounds and compounds represented by general formula (c1)>

Component (C) is a cyclic compound (lactone) that contains a C(=O)-O- in the ring and generates carbon dioxide by thermal decomposition, and has a melting point of 70°C or higher, preferably 100°C or higher. The "melting point" here is the temperature at which a solid melts into a liquid, and represents a value determined using a capillary melting point measuring device or a thermal analysis device (DTG).

"Ascorbic acid-based compound" refers to a substance containing ascorbic acid, its isomers, their esters, or their salts.

Erythrobonic acid (erythorbic acid) is mentioned as an isomer of ascorbic acid.

Esters of ascorbic acid or its isomers can be those generally proposed as vitamin C derivatives, such as higher fatty acid esters of ascorbic acid, higher fatty acid esters of erythorbic acid, phosphate esters of ascorbic acid, phosphate esters of erythorbic acid, etc. . Among the above-mentioned higher fatty acid esters, the higher fatty acid is preferably a fatty acid having 16 to 18 carbon atoms, and examples thereof include palmitic acid and stearic acid.

Examples of salts of ascorbic acid or its isomers include sodium salts, calcium salts, potassium salts, magnesium salts, and phosphate salts.

Ascorbic acid-based compounds are preferably ascorbic acid, isomers of ascorbic acid, higher fatty acid esters of ascorbic acid, higher fatty acid esters of isomers of ascorbic acid, salts of ascorbic acid, and salts of isomers of ascorbic acid.

Specific examples of ascorbic acid compounds include ascorbic acid (melting point 190°C), erythorbic acid (melting point 168°C); ascorbyl palmitate (melting point 115°C), ascorbyl stearate (melting point 117°C); sodium ascorbate ( Melting point 220°C), sodium erythorbate (melting point 168°C) and other salts.

Among the compounds represented by the following general formula (c1), examples of the 5-membered ring compound include glucuronolactone (D-glucurono-6,3-lactone) (R ³ =-CH(OH)-CHO, m=1; melting point 170°C), D-erythronolactone (R ³ =hydrogen atom, m=1; melting point 100°C), L-gulonolactone (R ³ =-CH(OH)- CH ₂ OH, m=1; melting point 184°C), among which glucuronolactone is preferred.

Examples of the 6-membered ring compound include gluconolactone (glucono-δ-lactone) (R ³ =—CH ₂ OH, m=2; melting point: 151° C.) and the like.

[Chem 2]

[wherein, R ³ is -CH(OH)-CHO, -CH ₂ OH, -CH(OH)-CH ₂ OH or a hydrogen atom. m is 1 or 2. ]

Among the compounds represented by the general formula (c1), 5-membered ring compounds are preferred, and glucuronolactone is particularly preferred.

The (C) component contained in the fumigant insecticide of this invention may be 1 type, and may be 2 or more types.

It is preferable to use an ascorbic acid type compound as (C)component.

The content of the component (C) in the fumigant insecticide is preferably 10 to 50% by mass, more preferably more than 20% by mass and less than 50% by mass, more preferably more than 20% by mass, based on the total mass of the fumigant type insecticide. 40% by mass or less, particularly preferably 25 to 40% by mass.

(C) When content of component is less than a preferable lower limit, the volatilization efficiency of (A) component may fall significantly. Even if (C)component exceeds a preferable upper limit, the volatilization efficiency of (A) component will hardly change, and it is unpreferable from an economic viewpoint. Moreover, content of (B) component decreases, and it becomes difficult to acquire visual sense of actual effect.

是指相对于烟熏型杀虫剂中包含的(A)成分的质量，(B)成分和(C)成分的合计质量的比例的意思。In the present invention

It means the ratio of the total mass of (B) component and (C) component with respect to the mass of (A) component contained in a fumigating type insecticide.

The mass ratio represented by ((B) component + (C) component)/(A) component (hereinafter referred to as "(B+C)/A ratio") in the smoke-type insecticide is 0.5 to 3.5, preferably 1.0 ~3.0, more preferably 1.5~2.5.

(B+C)/A ratio is more than the lower limit value of this range, (A) component can fully volatilize. In addition, it is easy to obtain a sense of practical effect in terms of viewing angle. When the (B+C)/A ratio is below the upper limit of this range, the volatilization rate of the (A) component can be increased while moderately suppressing the amount of generated smoke.

The "mass ratio represented by (B) component/(C) component" in this invention means the mass ratio of (B) component with respect to the mass of (C) component contained in a fumigant type insecticide.

In the smoke-type insecticide, the mass ratio represented by (B) component/(C) component (hereinafter referred to as "B/C ratio") is preferably 2 or less, more preferably 0.05 to 1.5, further preferably 0.10 to 1.0, especially Preferably 0.30 to 0.90.

When the B/C ratio is below the preferable upper limit, the volatilization rate of the (A) component can be increased while moderately suppressing the amount of generated smoke. When the B/C ratio is more than the preferable lower limit, white smoke can be easily recognized, and a visual sense of practical effect can be easily obtained.

＜Any ingredients＞

The fumigant-type insecticide may contain arbitrary components other than the said (A) component, (B) component, and (C)component within the range which does not impair the effect of this invention. Examples of optional components include additives such as stabilizers, binders, excipients, fragrances, and colorants. These optional components preferably contain one or more selected from stabilizers, binders, and excipients.

Examples of the stabilizer include dibutylhydroxytoluene, butylhydroxyanisole, propyl gallate, epoxy compounds (epoxidized soybean oil, epoxidized linseed oil, etc.), surfactants, and the like.

Surfactants are generally not particularly limited as long as they are used in pharmaceuticals, quasi-drugs, cosmetics, miscellaneous goods, etc., but from the viewpoint of solubility and dispersibility in component (B), preferably non- ionic surfactant. For example, polyoxyethylene hydrogenated castor oil (Polyoxyethylene Hydrogenated Castor Oil), polyoxyethylene alkyl ether (Polyoxyethylene alkyl ether), polyoxyethylene polyoxypropylene alkyl ether (Polyoxyethylene polyoxypropylene alkyl ether), sorbitol fatty acid ester (Sorbitan fatty acid ester), Glycerin fatty acid ester, Propylene glycol fatty acid ester, Polyethylene glycol fatty acid ester, Polyglycerol fatty acid ester fatty acid ester), polyoxyethylene glycerinfatty acid ester, polyoxyethylene sorbitan fatty acid ester, sucrose fatty acid ester, etc.

Examples of the binder include methyl cellulose, ethyl cellulose, carboxymethyl cellulose, hydroxypropyl methyl cellulose (hypromellose), hydroxypropyl cellulose, starch, dextrin, hydroxypropyl cellulose, Base starch, gelatin, polyvinyl alcohol, polyvinyl acetate, polyvinylpyrrolidone, sodium polyacrylate, etc.

Examples of the excipient include inorganic porous substances such as kaolin (clay), perlite, talc, diatomaceous earth, bentonite, and white carbon black. Among them, diatomaceous earth is preferable from the viewpoint of better storage stability of the fumigating insecticide.

The fumigating insecticide of the present invention can be prepared into liquid preparations or solid preparations such as powders, granules, and tablets. As for the production method of the fumigant insecticide, a known production method is used according to the target dosage form. For example, in the case of a liquid formulation, it can be produced by a production method of mixing and dissolving or dispersing components. In addition, in the case of granular preparations, they can be produced by known granulated production methods such as extrusion granulation, compression granulation, stirring granulation, swing granulation, fluidized bed granulation, and the like.

As a production method based on the extrusion granulation method, the components of the fumigating insecticide are mixed by a kneader, etc., and an appropriate amount of water is further added to mix, and the resulting mixture is extruded or Transverse extruder granulator for granulation. The above-mentioned granulated product may be further cut into an arbitrary size with a cutter or the like, or may be sized and dried.

＜Smoking method＞

As the fumigation method of the fumigation-type insecticide, conventionally known methods can be mentioned. Examples include a method of storing the fumigant insecticide in any container such as a metal container or a ceramic container, and directly or indirectly heating the fumigant insecticide, among which the indirect heating method is preferable. Indoor pollution caused by burning of the fumigant insecticide can be reduced by indirectly heating the fumigant insecticide. In addition, the object space may be subjected to fumigation treatment using a fumigation-type insecticide described later.

The target space is not particularly limited, and examples thereof include a bathroom, a living room, a bedroom, a closet, a toilet, the interior of a vehicle, and other closed spaces.

The insecticide target is not particularly limited, and examples thereof include sanitary pests such as flies, mosquitoes, cockroaches, and mites. According to the fumigation method of indirectly heating the fumigation-type insecticide of the present invention, a sufficient insecticidal effect can be obtained particularly against fast-moving crawling pests such as cockroaches.

As a device for indirectly heating the fumigating insecticide, as long as it does not burn the fumigating insecticide, and can supply the fumigating insecticide so that the (B) component can be vaporized, and the (C) component can be thermally decomposed. What is necessary is just heat energy, for example, the method of accommodating a fumigating-type insecticide in a metal container, and heating the fumigating-type insecticide via this metal container is mentioned.

As the heating method, conventionally known methods can be used, for example, a method of contacting a substance that generates heat in contact with water and utilizing the heat of reaction; mixing iron powder and an oxidizing agent (ammonium chlorate, etc.), or mixing a metal and a metal Metal oxides or oxidants with low ionization tendency, methods using the heat of oxidation reaction, etc. Calcium oxide, magnesium chloride, aluminum chloride, calcium chloride, ferric chloride, etc. are mentioned as a substance which generates heat by contacting with water. Among them, from the viewpoint of practicality, a method of using a heat of reaction by contacting a substance that generates heat in contact with water is preferable, and a method of using the heat of reaction between calcium oxide and water is more preferable.

The fumigating type insecticide of the present invention, as described above, is heated to about 150 to 450° C. to emit white smoke, and at the same time, the component (A) is volatilized. If the smoke-type insecticide of the present invention is heated in spaces such as houses and vehicles, through the above-mentioned smoke, the (A) component will evaporate into the above-mentioned space in a short time, and can play a role in killing insects. Insect effectiveness.

The heating temperature of the smoke-type insecticide is about 150-450°C, preferably 170-400°C, more preferably 190-400°C. Heating to above 150°C can make the generated (B) component and the steam of carbon dioxide produced by thermal decomposition of (C) component be sprayed out in the form of smoke, and the (A) component can diffuse into the entire space of the treatment object in a short time. Within the above heating temperature range, the higher the heating temperature, the shorter the time for the component (A) to diffuse throughout the space, and the wider the diffusion range. If the heating temperature exceeds 450° C., the component (A) is thermally decomposed, and the amount of diffusion may decrease in an effective state (undecomposed state) (lower volatilization efficiency). If the heating temperature is 450° C. or lower, since the thermal decomposition of the (A) component is suppressed, the volatilization efficiency is improved. Here, "heating temperature" means the temperature of the inner bottom surface center part of a container at the time of heating.

For the heating of the fumigant insecticide, the surface of the heat transfer part of the metal container for storing the fumigant insecticide is preferably at 300 to 450°C, more preferably at 350 to 450°C. By controlling the set temperature of the heat-fumigant insecticide in this way, the (A) component becomes easier to volatilize.

In addition, it is preferable to bring the temperature of the fumigant-type insecticide to a set temperature in a short time by heating. Specifically, after each reaction in the above-mentioned heating method starts heating, it is preferably within 120 seconds, more preferably within 60 seconds, and the heating reaches the set temperature. By controlling the heating temperature in this way, the thermal decomposition of the (A) component is suppressed better, and the insecticidal effect increases.

It is further preferred to keep the set temperature for as long as possible. Specifically, it is preferably more than 90 seconds, more preferably more than 150 seconds, and the set temperature is maintained for heating. By keeping the set temperature like this, the fuming duration becomes longer, and the (A) component can diffuse into the entire space of the treatment object, or, better, the amount of volatilization in the space of the (A) component can be increased.

The above-mentioned set temperature, heating rate, and retention time may be appropriately set according to the type of (A) component. When calcium oxide is used as a substance that generates heat in contact with water, it can be controlled by selecting the ratio of calcium oxide to water, the amount of calcium oxide used, and the commercial grade of calcium oxide. In addition, it can also be controlled by the capacity or material of the container for storing the fume-type insecticide.

The usage amount of the fumigating insecticide may be appropriately selected according to the volume of the space to be used. Usually, it is preferably 0.05 to 2.0 g, more preferably 0.1 to 1.5 g per 1 m ³ of the object space.

The smoking treatment time (the time from the start of smoking until the airtightness of the object space is released) is not particularly limited, but is preferably 1 hour or more, more preferably 1.5 hours or more.

The fumigating insecticide of the present invention is preferably characterized in that it comprises, as the component (A), a composition selected from the group consisting of diafenoxone, propoxur, d,d-T-cyphenothrin, phenothrin and permethrin. At least one insecticidal active ingredient in the group; as (B) component diol; as (C) component selected from ascorbic acid, erythorbic acid, ascorbyl palmitate, ascorbyl stearate, sodium ascorbate, erythorbic acid At least one compound selected from the group consisting of sodium, glucuronolactone, D-erythronolactone, L-gulonolactone, and glucuronolactone (component (B) + component (C)) /(A) A smoke-type insecticide with a mass ratio represented by component (A) of 0.5 to 3.5.

The fumigating insecticide of the present invention is preferably characterized in that it comprises, as the component (A), a composition selected from the group consisting of diafenoxone, propoxur, d,d-T-cyphenothrin, phenothrin and permethrin. At least one insecticidal active ingredient in the group; as (B) component, at least one polyhydric alcohol selected from the group consisting of propylene glycol and dipropylene glycol; as (C) component, selected from ascorbic acid, D-isoascorbic acid, At least one compound of the group consisting of ascorbyl palmitate, glucuronolactone, and glucuronolactone, wherein the mass ratio represented by ((B) component + (C) component) / (A) component is 0.5 to 3.5 Fume type insecticide.

The fumigating insecticide of the present invention is preferably characterized in that it comprises, as the component (A), a composition selected from the group consisting of diafenoxone, propoxur, d,d-T-cyphenothrin, phenothrin and permethrin. At least one insecticidal active ingredient in the group; as (B) component, at least one polyhydric alcohol selected from the group consisting of propylene glycol and dipropylene glycol; as (C) component, selected from ascorbic acid, D-isoascorbic acid and At least one compound in the group consisting of ascorbyl palmitate, a fumigant insecticide having a mass ratio represented by ((B) component+(C) component)/(A) component of 0.5 to 3.5.

The fumigating insecticide of the present invention is preferably characterized in that it comprises, as the component (A), a composition selected from the group consisting of diafenoxone, propoxur, d,d-T-cyphenothrin, phenothrin and permethrin. At least one insecticidal active ingredient in the group; as (B) component, at least one polyhydric alcohol selected from the group consisting of propylene glycol and dipropylene glycol; as (C) component, selected from glucuronolactone and glucose At least one compound in the group consisting of acid lactones, a smoke-type insecticide having a mass ratio represented by ((B) component+(C) component)/(A) component of 0.5 to 3.5.

(Smoke Type Insect Killer)

The fume-type insecticide of the present invention accommodates the above-mentioned fumigant-type insecticide of the present invention, is provided with a heating device for heating the above-mentioned fumigant-type insecticide, and (B) component and (C) component vaporized by heating The steam of carbon dioxide produced by thermal decomposition disperses the above-mentioned fumigant insecticide into the space violently, which is a so-called ejection fumigant insecticide.

FIG. 1 is a cross-sectional view showing one embodiment of the fume-type insecticidal device of the present invention.

The fumigation-type insecticidal device 1 shown in FIG. 1 is roughly composed of an outer container 10, an inner container 20 disposed inside the outer container 10, and a heat generating portion as a heating device disposed between the outer container 10 and the inner container 20. 30. Consisting of fumigated insecticide 40 accommodated in the inner container 20 .

As the fumigant insecticide 40, the above-mentioned fumigant insecticide of the present invention is used.

The heat generating part 30 is filled with a substance that generates heat in contact with water (for example, calcium oxide, etc.). The filling amount of the above-mentioned substances can be determined by considering the heat required for generating steam from the fumigant insecticide 40 . Calcium oxide is preferable as the substance that generates heat upon contact with water, for example, the same substance as mentioned in the description of the above-mentioned smoking method. The ratio of calcium oxide and water may be appropriately determined in consideration of the density of the color of smoke, the amount of smoke produced, the duration of smoke, and the amount of volatilization of component (A).

In addition, the example shown here of filling with a substance that generates heat in contact with water does not limit the present invention. For example, a partition material may be provided in the heat generating part 30 to form a plurality of independent compartments, and each compartment is filled with a metal and a metal oxide or an oxidant having a lower ionization tendency than the metal.

While the inner container 20 serves as a container for storing the fumigating insecticide 40 , it also functions as a heat conduction part that conducts heat energy generated by the heating part 30 to the fumigating insecticide 40 .

The material of the inner container 20 may be any material as long as it has thermal conductivity, such as metal, plastic, paper, and the like.

The inner container 20 and the heat generating part 30 may be in contact with each other or may be separated from each other.

The outer container 10 is composed of a main body 12 , a lid 14 and a bottom 16 .

The material of the main body 12, the cover portion 14, and the bottom portion 16 is made of a heat-resistant material such as metal, ceramics, paper, etc.

The main body 12 is substantially cylindrical, and its inner diameter is larger than the outer diameter of the inner container 20 , and its height is higher than that of the inner container 20 . Accordingly, when the inner container 20 is installed in the outer container 10 , it is installed so that a gap is formed between the side wall and the bottom wall of the inner container 20 .

The cover part 14 is an object with steam passing holes, such as a net, a perforated metal plate, a grid-shaped frame, and the like.

Bottom 16 is a material having holes through which water can pass through and the material constituting heat generating part 30 (substance that generates heat in contact with water) cannot pass through, and is made of, for example, nonwoven fabric, net, or the like. Thus, water can permeate into the heating part 30 from the bottom 16 to make it generate heat during use.

It should be noted that the structure of the bottom 16 depends on the structure of the heat generating part 30. For example, when the heat generating part 30 is filled with a metal and a metal oxide or an oxidant that has a smaller ionization tendency than the above-mentioned metal, the structure of the bottom 16 can be impermeable to water. of.

The fumigation method using the fumigation type insecticidal device 1 will be described below.

First, the fume-type insecticidal device 1 is installed in the object space. Then, the heat generating part 30 is made to generate heat according to the mechanism of the heat generating part 30 . For example, when installing the heat generating part 30 filled with calcium oxide, the bottom 16 of the outer container 10 is immersed in water. As a result, the water penetrating from the bottom 16 reacts with the calcium oxide in the heat generating part 30 to generate heat of about 200 to 450°C.

At this time, the temperature of the inner bottom central portion 22 of the inner container 20 is preferably controlled to reach 300° C. or more within 120 seconds (more preferably 350° C. within 60 seconds) from the time when the bottom 16 of the outer container 10 is immersed in water. above). In addition, the temperature of the inner bottom central portion 22 is preferably maintained at 300° C. or higher for 90 seconds or longer (more preferably 150 seconds or higher). It should be noted that the temperature of the inner bottom central portion 22 can be controlled by adjusting the amount of water that reacts with calcium oxide.

Then, the heat generated by the reaction of the water infiltrated from the bottom 16 and the calcium oxide in the heat generating part 30 is transmitted to the fumigant insecticide 40 via the side wall and the bottom wall of the inner container 20, and the fumigant insecticide 40 The temperature rises, (B) component is vaporized, (C) component is thermally decomposed to generate carbon dioxide, and the vaporized (B) component and (C) component are thermally decomposed to generate carbon dioxide to generate steam. The generated steam rushes through the hole of the cover part 14 together with the component (A) to diffuse the component (A) into the target space, thereby obtaining an insecticidal effect. In addition, the steam of the component (B) looks like white smoke visually, and the user can obtain a sense of practical effect visually. Thereby, by using the fumigation-type insecticidal apparatus 1, insecticidal treatment can be implemented simply.

[Example]

Hereinafter, although the 1st aspect of this invention is concretely demonstrated using an Example, this does not limit this invention. In addition, the content of each component in Tables 1-3 shows the pure component conversion amount.

"(B+C)/A ratio" means the mass ratio represented by ((B) component+(C) component)/(A) component in a fumigant insecticide.

"B/C ratio" means the mass ratio represented by (B) component/(C) component in a fumigant type insecticide.

(using raw materials)

＜Component (A): Insecticidal active ingredient＞

A-1: chlorpyramidone, manufactured by Sumitomo Chemical Co., Ltd., in powder form.

A-2: d,d-T-cyphenothrin, manufactured by Sumitomo Chemical Co., Ltd., in liquid form.

A-3: Phenothrin, manufactured by Sumitomo Chemical Co., Ltd., in liquid form.

A-4: propoxur, manufactured by Sumitomo Chemical Co., Ltd., in liquid form.

A-5: Permethrin, manufactured by Sumitomo Chemical Co., Ltd., liquid state.

＜Component (B): Polyol＞

B-1: Propylene glycol, manufactured by Kanto Chemical Co., Ltd., liquid form.

B-2: Dipropylene glycol, manufactured by Kanto Chemical Co., Ltd., liquid state.

<Component (C): 1 or more selected from the group consisting of ascorbic acid-based compounds and compounds represented by general formula (c1)>

C-1: Ascorbic acid, manufactured by Kanto Chemical Co., Ltd., powder form.

C-2: D-erythorbic acid, manufactured by Kanto Chemical Co., Ltd., powder; isomer of ascorbic acid (erythorbic acid).

C-3: Ascorbyl palmitate, manufactured by Kanto Chemical Co., Ltd., powder (crystal) form.

C-4: Glucuronolactone (D-glucurono-6,3-lactone), manufactured by Kanto Chemical Co., Ltd., powder form.

C-5: Gluconolactone (glucono-δ-lactone), manufactured by Kanto Chemical Co., Ltd., powder form.

＜Any ingredients＞

Clay: Kaolin, manufactured by Showa Chemical Co., Ltd., in powder form; oil absorption 30-50g/100g.

Diatomite filter aid (ラヂオライト): diatomite, manufactured by Showa Chemical Industry Co., Ltd., in powder form; oil absorption: 150-250 g/100 g.

Hypromellose (Hiplomelose): manufactured by Shin-Etsu Chemical Co., Ltd., powder form.

Azodicarbonamide: manufactured by Eiwa Chemical Industry Co., Ltd., powder form.

(Evaluation method)

Each of the fumigating insecticides of each example was accommodated therein using the fumigating insecticide described below (one that did not store the fumigating insecticide), and each evaluation was performed.

Using the fumigation-type insecticide 1 of the embodiment shown in FIG. 1 , the fume-type insecticide 40 is not accommodated in the inner container 20, and the central part of the inner bottom surface of the inner container 20 is measured. 22 temperature changes. Specifically, a fume-type insecticide having the following form was used: a tinplate can (S size: Calcium oxide (43g) is filled in a diameter of 52mm×height of 67mm), and an inner container with a dedicated bottom cover and a temperature sensor fixed in the center of the inner bottom surface is placed in the tinplate can.

Then, on the central floor of the test room (temperature 25+2°C, relative humidity 45+5%RH) with an inner volume of 23.8m ³ (floor area 9.9m ² ×height 2.4m), each added a specified amount (22g) of Plastic cup of water (diameter 8cm, height 7cm).

Afterwards, in the plastic cup to which a prescribed amount (22g) of water has been added, the above-mentioned smoke-type insecticidal device equipped with a temperature sensor in the inner container is placed. Simultaneously with the start of heating, the measurement of the temperature at the center of the inner bottom surface of the inner container was started. The temperature at the central part of the inner bottom surface was measured every 1 second, and the maximum temperature reached, the time required to reach 300°C, the time required to reach 350°C, and the retention time at 300°C or higher were measured respectively. Each of these measurements was performed three times, and the average results are shown below.

In addition, a tape-shaped temperature sensor manufactured by Anritsu Keiki Co., Ltd. under the product name ST-13E-015-GW1-ANP was used. A thermometer manufactured by Anritsu Keiki Co., Ltd. with the product name COMPACT THERMO LOGGER AM-8000E was connected to the above-mentioned temperature sensor.

The highest temperature reached: 419.2°C.

Time required to reach 300°C: 17 seconds.

Time required to reach 350°C: 20 seconds.

Holding time for keeping above 300°C: 2 minutes and 24 seconds.

＜Evaluation of indoor pollution＞

Prepare the above-mentioned fume-type insecticide (without accommodating fume-type insecticide), store 6g of each example of fume-type insecticide in the inner container of the above-mentioned device, and fill the heating part in the above-mentioned device Calcium oxide 43g, make the smoked type insecticidal device with the same form as the smoked type insecticidal device 1 shown in Figure 1.

Next, a vinyl chloride board (black, 20 cm x 20 cm) was laid on the center of the floor of a 3.42 m x 3.82 m x 2.40 m test room (temperature 25 ± 2°C, relative humidity 45 ± 5% RH). A plastic container for water supply filled with 22 mL of water was placed in the center of the vinyl chloride plate, and a fumigation-type insecticide containing each fumigation-type insecticide of each example was placed in the plastic water supply container, and the fumigation process was started. . The fumigation treatment was carried out in the state of sealing the above-mentioned test room.

Two hours after the start of smoking, the vinyl chloride plate installed on the floor of the test room was taken out, and the indoor pollution property was visually evaluated according to the following indoor pollution property evaluation criteria.

[Evaluation criteria for indoor pollution]

⊚: Compared with the vinyl chloride board before smoking, no difference in the surface state was observed.

◯: Compared with the vinyl chloride board before smoking, almost no difference in the surface state can be seen.

Δ: Compared with the vinyl chloride board before smoking, a little contamination can be seen but the difference is hard to see.

×: Compared with the vinyl chloride board before smoking, it is easy to judge contamination, and the adhesion of stains is remarkable.

＜Evaluation of Visual Reality＞

In contrast to the above <Evaluation of Indoor Pollution Property>, the visual sense of practical effect was evaluated as follows.

Video images were taken from the start of smoking to the end of smoking, and the video image at the end of smoking was analyzed using image analysis software WinROOF (Visual System manufactured by Mitani Shoji Co., Ltd.). The image selection frame (ROI) is set at the whitest part of the smoke at the end time of smoking, and the color extraction process is performed.

At this time, the RGB (RGB color model) value is measured, and the B value (blue value) is used as the smoke concentration of the smoke. The measurement was performed three times, the average value of the B value was obtained, and the visual sense of practical effect was evaluated based on the evaluation criteria shown below.

The larger the B value, the higher the whiteness of the smoke, and the easier it is to obtain a sense of visual effect.

[Evaluation Criteria for Visual Effectiveness]

⊚: The average value of the B value is 170 or more (the white smoke of the smoke is very thick).

◯: The average value of the B value is 150 or more and less than 170 (smoke is dense in white).

Δ: The average value of the B value is 110 or more and less than 150 (smoky matter is sufficiently visible).

×: The average value of the B value is less than 110 (smoke is seen visually, but the white of the smoke is very light).

＜Evaluation of the volatilization rate of insecticidal active ingredients＞

Prepare the above-mentioned fume-type insecticide (without accommodating fume-type insecticide), store 6g of each example of fume-type insecticide in the inner container of the above-mentioned device, and fill the heating part in the above-mentioned device Calcium oxide 43g, make the smoked type insecticidal device with the same form as the smoked type insecticidal device 1 shown in Figure 1.

Next, set a plastic container for water supply filled with 22mL of water in the center of the floor of a test room (temperature 25±2°C, relative humidity 45±5%RH) with an internal volume of 6.38m ³ (6380L), and inside the plastic container for water supply The fumigating-type insecticides containing the fumigating-type insecticides of the respective examples were put in, and the fumigation treatment was started. Configure the above-mentioned smoke-type insecticidal device to start to produce white smoke after 1 minute.

The air in the test chamber was stirred with a fan 5 minutes after the time point when white smoke started to be generated. After stirring, use a vacuum pump to suck 20L of air in the test chamber into the recovery column, so that the (A) component (insecticidal active ingredient) volatilized in the test chamber is adsorbed. Silica gel for chromatography (Wakogel C-100, manufactured by Wako Pure Chemical Industries, Ltd.) was used for the recovery column.

Then, after the active ingredient is adsorbed, acetone is passed through the recovery column, and the active ingredient adsorbed by silica gel for chromatography is eluted. After that, the recovered acetone is used as a sample, and the amount X (g) of the (A) component in the sample is quantified by gas chromatography (GC) (In addition, when multiple (A) components are used, each component can be quantified simultaneously) . Using this quantitative result and the amount Y (mass %) of the (A) component in the fumigant insecticide, the volatilization rate (%) was calculated from the following formula. And, the volatilization rate of the insecticidal active ingredient was evaluated based on the following evaluation criteria.

Evaporation rate (%)=[X(g)/20(L)]×[100/(6(g)×Y(mass%))]×6380(L)×100

[Evaluation Criteria of Volatility Rate of Insecticidal Active Ingredient]

In the case where the insecticidal active ingredient is A-1 (diafenoxone):

◎The volatile rate is above 50%,

○The evaporation rate is more than 35% and less than 50%,

ΔThe volatilization rate is more than 20% and less than 35%,

×The volatilization rate is less than 20%.

In the case where the insecticidal active ingredient is A-2 (d, d-T-cyphenothrin):

◎The evaporation rate is above 60%,

○The evaporation rate is more than 45% and less than 60%,

ΔThe volatilization rate is more than 30% and less than 45%,

×The volatilization rate is less than 30%.

(Example 1)

According to the composition shown in Table 1, under the condition of 20 ℃, powdery raw materials (A-1, C-1, clay and hypromellose) were kneaded with a kneader (S5-2G type, MORIYAMA Co., Ltd. (manufactured by Moriyama Co., Ltd.) and stirred and mixed. In addition, a mixed liquid prepared by stirring and mixing liquid raw materials (A-2 and B-1) was charged to the above-mentioned kneader, and a mixture was obtained by mixing the powdery raw material mixture and the mixed liquid.

The obtained mixture was granulated with a pre-extrusion granulator (EXK-1, manufactured by Fuji Puugul Co., Ltd.) having a die having a diameter of 2 mm to obtain a granulated product. The obtained granulated material was dried with a dryer (RT-120HL, manufactured by ALP Corporation) set at 70° C. to obtain a granular fumigant insecticide.

Each of the above-mentioned evaluations was performed on the obtained fumigant insecticide. The results are shown in Table 1.

(Examples 2-20, 22, 23, Comparative Examples 1-2)

According to the composition described in Tables 1-2, it carried out similarly to Example 1, and obtained the granular fumigating type insecticide.

Each of the above-mentioned evaluations was performed on the obtained fumigant insecticide. The results are shown in Tables 1-2.

(Example 21)

Except having changed the clay into a diatomaceous earth filter aid, according to the composition shown in Table 2, it carried out similarly to Example 1, and obtained the granular fumigating type insecticide.

Each of the above-mentioned evaluations was performed on the obtained fumigant insecticide. The results are shown in Table 2.

(comparative example 3)

Except having further used azodicarbonamide, according to the composition shown in Table 2, it carried out similarly to Example 1, and obtained the granular fumigant type insecticide.

Each of the above-mentioned evaluations was performed on the obtained fumigant insecticide. The results are shown in Table 2.

[Table 1]

According to the evaluation results shown in Tables 1 to 2, it can be confirmed that the fumigating insecticides of Examples 1 to 23 of the present invention are low-pollution, the user can obtain a visual sense of effectiveness, and the insecticidal active ingredient High volatile rate.

(Examples 24-27)

According to the composition shown in Table 3, a granular fumigant insecticide was obtained in the same manner as in Example 1.

(Example 28)

Except having changed the clay in Example 8 into a diatomaceous earth filter aid, it carried out similarly to Example 8, and obtained the granular fumigating insecticide. .

Table 3 shows the compositions of the fumigant insecticides of Examples 24 to 28 to which the present invention is applied.

[table 3]

Claims (10)

1. A smoke-type insecticide, characterized in that it contains (A) Components: insecticidal active ingredients, (B) Component: Polyol, and (C) Component: one or more compounds selected from the group consisting of ascorbic acid-based compounds and compounds represented by the following general formula (c1), ((B) component + (C) component) / (A) component represents a mass ratio of 0.5 to 3.5, [chemical 1]

In the formula, R ³ is -CH(OH)-CHO, -CH ₂ OH, -CH(OH)-CH ₂ OH or a hydrogen atom, and m is 1 or 2. 2 . The fumigant insecticide according to claim 1 , wherein the mass ratio represented by (B) component/(C) component is 2 or less. 3. The smoke-type insecticide as claimed in claim 1, characterized in that, the (A) component is selected from the group consisting of diafenoxone, propoxur, d, d-T-cyphenothrin, and phenothrin And at least one insecticidal active ingredient in the group consisting of permethrin. 4. The smoke-type insecticide according to claim 3, wherein the (A) component is selected from propoxur, d, d-T-cyphenothrin, phenothrin and permethrin A combination of at least one compound from the group consisting of esters and oxafluxazone, (Hyfepyrone): (at least one compound selected from the group consisting of propoxur, d, d-T-cyphenothrin, phenothrin and permethrin) represented by a mass ratio of 4:1～ 1:2. 5. The fume-type insecticide according to claim 1, wherein the component (B) is diol. 6 . The fumigant insecticide according to claim 1 , wherein the component (B) is at least one polyhydric alcohol selected from the group consisting of propylene glycol and dipropylene glycol. 7. The smoke-type insecticide as claimed in claim 6, characterized in that, the (B) component is a combination of propylene glycol and dipropylene glycol, (Propylene glycol): (Dipropylene glycol) The mass ratio expressed is 1:3-3:1. 8. The smoke-type insecticide according to claim 1, wherein the (C) component is selected from ascorbic acid, D-isoascorbic acid, ascorbyl palmitate, glucuronolactone and gluconolactone At least one compound of the group consisting of esters. 9 . The fume-type insecticide according to claim 1 , wherein the component (C) is at least one compound selected from the group consisting of glucuronolactone and glucuronolactone. 10. A fume-type insecticide, characterized in that it accommodates the fume-type insecticide according to any one of claims 1 to 9, and is equipped with a heating device for heating the fume-type insecticide .

Images