JP5568227B2 - Insecticide composition - Google Patents

Description

  The present invention relates to an insecticide composition.

Currently, in the field of household insecticides, most of the active ingredients (insecticidal ingredients) used for insecticides for controlling sanitary pests such as cockroaches are pyrethroid compounds. The pyrethroid compound used as an insecticidal component is a natural pyrethrin and its derivatives, and exerts a high effect on insects in a very small amount, and its mechanism of action is a stimulus transmitter or transmitter in insect nerve axons. It is known to inhibit the mechanism.
In addition, it has been proposed to add various compounds to the insecticide for the purpose of improving the efficacy, stability, safety and the like of the insecticidal component. For example, in Patent Document 1, a heterocyclic monocyclic compound such as N-alkylpyrrolidone is used in combination with a pyrethroid insecticide as a flushing out enhancer. Moreover, in patent documents 2-3, nonionic surfactant, hydrocarbon, water, etc. are mix | blended with the insecticidal component.

In recent years, interest in insecticide residual toxicity has increased, and the development of safer insecticides that are excellent in low toxicity and selective toxicity has been desired.
In response to such a demand, an insecticide containing no insecticidal component has been proposed. For example, Patent Document 4 proposes a microemulsion insecticide containing a specific amount of a hydrocarbon solvent, a surfactant and water. Further, in Patent Document 5, for controlling flies that contain at least one selected from a surfactant that can be dissolved or solubilized in water or a solvent containing water, plant essential oil, ethanol, and reduced starch saccharified product. Compositions have been proposed.
JP 2003-327502 A Japanese Patent Laying-Open No. 2005-068127 JP 2005-298420 A Special table 2001-506654 gazette JP 2008-019226 A

However, conventional insecticides that do not contain an insecticidal component are not sufficiently effective, and also have problems with stability as a formulation, such as white turbidity and sedimentation during storage. Therefore, practically, an insecticidal composition having higher insecticidal efficacy and excellent stability is required.
The present invention has been made in view of the above points, and an object of the present invention is to provide an insecticide composition having high insecticidal efficacy and excellent stability even if it does not contain an insecticide component.

As a result of intensive studies, the present inventors have demonstrated that high insecticidal efficacy is exhibited by a combination of a quaternary ammonium salt type cationic surfactant, a specific hydrocarbon, and a specific solvent, and even without using an insecticidal component. It was found that pest control can be performed safely, and that a highly water-soluble quaternary ammonium salt type cationic surfactant can be stably blended in a non-aqueous system substantially free of water, thereby completing the present invention.
That is, the insecticide composition of the present invention comprises a quaternary ammonium salt type cationic surfactant (A) (hereinafter referred to as component (A)) and a hydrocarbon (B) (hereinafter referred to as ( B) component)) and at least one solvent (C) selected from the group consisting of isopropyl alcohol, n-propyl alcohol, ethanol and N-methyl-2-pyrrolidone (hereinafter referred to as component (C)). The content of the component (A) is 0.1 to 7% by mass, the content of the component (B) is 70 to 99 % by mass, and the content of the component (C) is 0.00. 05 to 10% by mass, and the water content is 3% by mass or less.
Moreover, the insecticide composition of the present invention further comprises at least one ester (D) selected from the group consisting of fatty acid alkyl esters, polyhydric alcohol fatty acid esters, polybasic acid esters and hydroxy acid esters (hereinafter referred to as ( It is preferable to contain the component D).

  ADVANTAGE OF THE INVENTION According to this invention, even if it does not contain insecticidal components, such as a pyrethroid type compound, an insecticidal composition with high insecticidal efficacy and excellent stability can be provided.

[(A) component]
The component (A) is a quaternary ammonium salt type cationic surfactant.
(A) As a cation, the quaternary ammonium salt which has a quaternary ammonium ion which has a C8-C22 long-chain alkyl group or a C8-C22 long-chain alkenyl group as a cation is mentioned as a cation. It is done.
The long-chain alkyl group or the long-chain alkenyl group may be linear or branched.
The carbon number of the long-chain alkyl group or the long-chain alkenyl group is preferably 22 or less, and more preferably 18 or less, because of excellent insecticidal efficacy. Moreover, since this carbon number is excellent in stability of an insecticide composition, it is preferable that it is 8 or more, and it is more preferable that it is 10 or more.
The long-chain alkyl group or long-chain alkenyl group may contain —O—, —OH and the like in the structure.

  More specifically, examples of the component (A) include ammonium salts represented by the following general formula (I), diammonium salts represented by the following general formula (II), and the like.

［式中、Ｒ^１〜Ｒ^４はそれぞれ独立に、炭素数８〜２２の長鎖アルキル基、炭素数８〜２２の長鎖アルケニル基、炭素数１〜４の短鎖アルキル基またはベンジル基であり、Ｒ^１〜Ｒ^４のうちの少なくとも１つは、炭素数８〜２２の長鎖アルキル基または炭素数８〜２２の長鎖アルケニル基であり；Ｒ^５〜Ｒ^１０はそれぞれ独立に、炭素数８〜２２の長鎖アルキル基、炭素数８〜２２の長鎖アルケニル基、炭素数１〜４の短鎖アルキル基またはベンジル基であり、Ｒ^５〜Ｒ^１０のうちの少なくとも１つは、炭素数８〜２２の長鎖アルキル基または炭素数８〜２２の長鎖アルケニル基であり；Ｒ^１１はアルキレン基であり；Ｘ⁻はアニオンである。］

[Wherein, R ^{1 to} R ⁴ are each independently a long-chain alkyl group having 8 to 22 carbon atoms, a long-chain alkenyl group having 8 to 22 carbon atoms, a short-chain alkyl group having 1 to 4 carbon atoms, or a benzyl group. And at least one of R ^{1 to} R ⁴ is a long-chain alkyl group having 8 to 22 carbon atoms or a long-chain alkenyl group having 8 to 22 carbon atoms; R ^{5 to} R ¹⁰ are each independently carbon A long-chain alkyl group having 8 to 22 carbon atoms, a long-chain alkenyl group having 8 to 22 carbon atoms, a short-chain alkyl group having 1 to 4 carbon atoms, or a benzyl group, and at least one of R ^{5 to} R ¹⁰ is A long-chain alkyl group having 8 to 22 carbon atoms or a long-chain alkenyl group having 8 to 22 carbon atoms; R ¹¹ is an alkylene group; and X ⁻ is an anion. ]

In the formula, examples of the long-chain alkyl group and the straight-chain alkenyl group in R ^{1 to} R ¹⁰ are the same as those described above.
The short chain alkyl group is most preferably a methyl group.
As the alkylene group for R ^11, a linear or branched alkylene group having 1 to 10 carbon atoms is preferable.
X ⁻ is not particularly limited, and for example, inorganic acid ions such as Cl ⁻ , Br ⁻ , (SO ₄ ) ^2- ; benzoic acid, citric acid, malic acid, succinic acid, acrylic acid, methyl sulfate (CH ₃ — And organic acid ions such as SO ₄ ⁻ ) and ethyl sulfate (C ₂ H ₅ —SO ₄ ⁻ ).

In formula (I), at least one of R ^{1 to} R ⁴ is the long-chain alkyl group or the long-chain alkenyl group.
In the present invention, from the viewpoint of excellent insecticidal efficacy, one to three of R ^{1 to} R ⁴ are preferably the long chain alkyl group or the long chain alkenyl group, and one or two are the long chain alkyl groups. Alternatively, the long-chain alkenyl group is more preferable, and ^one of R ^{1 to} R ⁴ is more preferably the long-chain alkyl group or the long-chain alkenyl group. In this case, the remaining 3 to 1 are preferably short-chain alkyl groups, and particularly preferably methyl groups.
In formula (II), at least one of R ^{5 to} R ¹⁰ is the long-chain alkyl group or the long-chain alkenyl group.
In the present invention, from the viewpoint of excellent insecticidal efficacy, one or two of R ^{5 to} R ¹⁰ are preferably the long chain alkyl group or the long chain alkenyl group, and one of R ^{5 to} R ^10. It is more preferable that one is the long chain alkyl group or the long chain alkenyl group. In this case, the remaining 5 to 4 are preferably short-chain alkyl groups, and particularly preferably methyl groups.
Specific examples of the ammonium salt or diammonium salt include, for example, those having a long chain alkyl group, such as monoalkyl (C8-22) trimethylammonium salt, dialkyl (C8-22) dimethylammonium salt, trialkyl (C8- 22) Monomethylammonium salt, tetraalkyl (C8-22) ammonium salt, monoalkyl (C8-22) dimethylbenzylammonium salt, polyoxyethylene (POE) alkyl (C8-22) methylammonium salt, monoalkyl (C8-22) ) Pentamethyldiammonium salt and the like.

As the component (A), more specifically, lauryl trimethyl ammonium chloride, lauryl trimethyl ammonium bromide, cetyl trimethyl ammonium chloride, cetyl trimethyl ammonium bromide, stearyl trimethyl ammonium chloride, stearyl trimethyl ammonium bromide, octadecyl trimethyl ammonium chloride, Alkyltrimethylammonium chloride, octyldihydroxyethylmethylammonium chloride, coconut oil fatty acid trimethylammonium chloride, behenyltrimethylammonium chloride, benzalkonium chloride, coconut oil fatty acid dimethylbenzylammonium chloride, stearyldimethylbenzylammonium chloride, dodecyldimethylethylbenzylammonium chloride, Lauryldimethyl (ethylbenzyl) ammonium chloride, salt Myristyl dimethyl benzyl ammonium chloride, isostearyl lauryl dimethyl ammonium chloride, didecyl dimethyl ammonium chloride, dicocoyl dimethyl ammonium chloride, distearyl dimethyl ammonium chloride, dioleyl dimethyl ammonium chloride, dialkyl dimethyl ammonium chloride, di-cured tallow fatty acid ethyl methyl ammonium sulfate, Examples include polyoxypropylene methyl diethylammonium chloride, dipolyoxyethylene oleylmethylammonium chloride, dipolyoxyethylene stearylmethylammonium chloride, and octyldihydroxyethylmethylammonium chloride.
Among these, considering both stability and efficacy, it is particularly selected from the group consisting of cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, didecyldimethylammonium chloride, dicocoyldimethylammonium chloride and distearyldimethylammonium chloride. At least one is preferred.
As these components (A), commercially available products can be used.

As the component (A), any one type may be used alone, or two or more types may be used in combination.
In the insecticide composition of the present invention, the content of the component (A) is preferably 0.1 to 7 mass%, more preferably 0.5 to 6 mass%, based on the total mass of the insecticide composition. 1-5 mass% is further more preferable. When the content is not less than the lower limit of the above range, the insecticidal efficacy is sufficiently exhibited, and when it is not more than the upper limit of the range, the stability of the preparation is good.

[Component (B)]
The component (B) is a hydrocarbon that is liquid at 25 ° C.
Examples of the component (B) include liquid carbon hydrogens obtained from petroleum and mixtures thereof, polymers of natural and synthetic hydrocarbons, and hydrogenated products thereof. These include linear and branched carbon hydrogens. The number of carbon atoms of the hydrocarbon varies depending on the compound, but is preferably about 12 to 28 in consideration of the cleanliness, usability and efficacy of the coated surface. The hydrocarbon may be saturated or unsaturated.
As the component (B), specifically, liquid paraffin, light liquid paraffin, low specific gravity liquid paraffin (1), low specific gravity liquid paraffin (2), liquid isoparaffin, liquid polyisobutylene, isoparaffin, light liquid isoparaffin, light isoparaffin, Heavy liquid isoparaffin, hydrogenated polybutene, liquid polyisoprene, kerosene (other name: kerosene), squalane, synthetic squalane, vegetable squalane, squalene, partially hydrogenated squalene, α-olefin oligomer, tetradecene, polypropylene and the like. Low specific gravity liquid paraffin (1) and (2) are the names listed in the official document “Quasi-drug additive standard 2006”.
Among these, at least one selected from the group consisting of liquid paraffin, light liquid paraffin, liquid isoparaffin, light liquid isoparaffin, liquid polyisoprene, and kerosene (also known as kerosene) is preferable.
As these components (B), commercially available products can be used.

As the component (B), any one type may be used alone, or two or more types may be used in combination.
In the insecticidal composition of the present invention, the content of the component (B) is excellent in the effects of the present invention, and is preferably 70 to 99% by mass, and 75 to 97% by mass with respect to the total mass of the insecticidal composition. % Is more preferable, and 80 to 95% by mass is more preferable.

[Component (C)]
The component (C) is selected from the group consisting of isopropyl alcohol (other name: 2-propanol), n-propyl alcohol (other name: 1-propanol), ethanol and N-methyl-2-pyrrolidone (other name: N-methylpyrrolidone). At least one solvent. These may be used alone or in combination of two or more.
Commercially available isopropyl alcohol, n-propyl alcohol, ethanol and N-methyl-2-pyrrolidone can be used.
In the insecticide composition of the present invention, the content of the component (C) is preferably 0.05 to 10% by mass, more preferably 0.3 to 5% by mass, with respect to the total mass of the insecticide composition. 0.7-4 mass% is further more preferable. When the content is at least the lower limit of the above range, the solubility of the component (A) is good and the stability is improved. When the amount is not more than the upper limit of the range, the balance with other components is good, and the insecticidal efficacy and stability are both good.

[(D) component]
The component (D) is at least one ester selected from the group consisting of fatty acid alkyl esters, polyhydric alcohol fatty acid esters, polybasic acid esters, and hydroxy acid esters. In the present invention, the component (D) is not essential, but by containing this, the solubility of the component (A) is improved and the stability is further improved.
(D) It does not specifically limit as a component, For example, what is normally used by a pharmaceutical, a quasi-drug, cosmetics, miscellaneous goods, etc. can be used.
Specifically, examples of the fatty acid alkyl ester include esters of a fatty acid having 8 to 22 carbon atoms and a monohydric alcohol.
As the fatty acid, specifically, caprylic acid, isononanoic acid, tetramethylnonanoic acid, capric acid, lauric acid, myristic acid, 2-hexyldecanoic acid, palmitic acid, stearic acid, isostearic acid, tetraisostearic acid, ethylhexanoic acid , Arachidic acid, behenic acid, 2-heptylundecanoic acid, oleic acid, elaidic acid, erucic acid, 2-ethylhexanoic acid, eicosenoic acid, 3,5,5-trimethylhexanoic acid, linoleic acid, eleostearic acid, linolene Acids, ricinoleic acid, arachidonic acid, eicosapentaenoic acid, docosahexaenoic acid, 12-hydroxystearic acid, and mixtures thereof are coconut oil fatty acid, hydrogenated coconut oil fatty acid, palm oil fatty acid, olive fatty acid, hydrogenated palm oil fatty acid, beef tallow Fatty acids, hardened beef tallow fatty acids, etc. It is. The fatty acid may be either a synthetic fatty acid or a naturally derived fatty acid.
The monohydric alcohol is preferably a monovalent aliphatic alcohol having 1 to 18 carbon atoms, specifically, methanol, ethanol, propanol, isopropanol, n-propanol, butanol, isobutanol, octanol, butyloctyl alcohol, lauryl alcohol. , Myristyl alcohol, 2-ethylhexanol, isononyl alcohol, decanol, undecanol, isotridecanol, cetanol, isostearyl alcohol, octyldodecanol, oleyl alcohol, 2-hexyldecyl alcohol and the like. The aliphatic alcohol may be either a synthetic alcohol or a naturally derived alcohol.

Examples of the polyhydric alcohol fatty acid ester include esters of a fatty acid having 8 to 22 carbon atoms and a polyhydric alcohol. Examples of the fatty acid include those described above. The polyhydric alcohol is preferably a dihydric or higher alcohol, and examples thereof include glycerin, polyglycerin, propylene glycol, pentaerythritol, trimethylolpropane, and neopentyl glycol.
Examples of the polybasic acid ester include esters of a fatty acid having two or more carboxyl groups and a monohydric alcohol. Examples of the fatty acid include adipic acid, sebacic acid, phthalic acid and the like. As monohydric alcohol, the said C1-C18 monohydric aliphatic alcohol is mentioned.
Examples of the hydroxy acid ester include esters of a hydroxy acid having 3 to 6 carbon atoms having a hydroxyl group in the molecule and a monohydric alcohol. Examples of the hydroxy acid include lactic acid, malic acid, citric acid, tartaric acid, glycolic acid, ricinoleic acid, and salicylic acid. As monohydric alcohol, the said C1-C18 monohydric aliphatic alcohol is mentioned.

As the component (D), more specifically, isopropyl isostearate, isopropyl myristate, isopropyl palmitate, isostearyl palmitate, octyl palmitate, octyldodecyl myristate, ethylhexyl stearate, triethylhexyl citrate, ethyl linoleate , Isopropyl linoleate, dibutyloctyl sebacate, octyldodecyl neopentanoate, dialkyl carbonate, butyl myristate, butyl stearate, cetyl ethylhexanoate, diethyl sebacate, diisopropyl adipate, di-2-heptylundecyl adipate, Diisopropyl sebacate, diisostearyl malate, octyldodecyl lactate, lauryl lactate, oleyl lactate, ethyl oleate, ethyl ethyl fatty acid, isos Hexyldecyl allylate, isocetyl myristate, isostearyl myristate, isocetyl stearate, ethylhexyl palmitate, diglyceryl triisostearate, propylene glycol dicaprate, pentaerythrityl tetraethylhexanoate, propylene glycol caprylate, propylene glycol dicaprylate, Triethylhexanoic acid trimethylolpropane, triisostearic acid trimethylolpropane, triethylhexanoin, tri (caprylic acid / capric acid) glyceryl, isononanoic acid isononyl, isononanoic acid isotridecyl, di-2-ethylhexanoic acid neopentyl glycol, dicapric acid neo Pentyl glycol, glyceryl tri-2-ethylhexanoate, glyceryl triisostearate, etc. It is below.
Among these, at least one selected from the group consisting of isopropyl myristate, isopropyl palmitate, diisopropyl adipate, diisopropyl sebacate, octyldodecyl lactate and propylene glycol caprylate is preferable.

As the component (D), any one type may be used alone, or two or more types may be used in combination.
In the insecticide composition of the present invention, the content of the component (D) is preferably 1 to 70 mass%, more preferably 5 to 65 mass%, and more preferably 8 to 60 mass% with respect to the total mass of the insecticide composition. % Is more preferable. When the content is not less than the lower limit of the above range, the solubility of the component (A) is improved and the stability is further improved. When the amount is not more than the upper limit of the range, the balance with other components is good, and the insecticidal efficacy and stability are both good. Moreover, it is preferable also within the said range that the cleanliness of the spray surface at the time of spraying the said insecticide composition is maintained.

The insecticide composition of the present invention is substantially free of water.
The insecticide composition may contain a small amount of moisture unintentionally due to the introduction of moisture derived from the raw material, moisture absorption, or the like. For example, since the component (A) is generally marketed as a solution of a solvent containing a small amount of water, when the insecticide composition of the present invention is prepared using such a commercial product as it is, A small amount of water is brought in. However, in the insecticide composition of the present invention, water may reduce the insecticidal efficacy and stability of the insecticide composition.
In consideration of such reasons, “substantially free of water” in the present invention means that the ratio of water in the insecticide composition is 3% by mass or less of the total mass of the insecticide composition. Indicates that If the proportion exceeds 3% by mass, the insecticidal efficacy and stability may be reduced. The proportion is preferably 1% by mass or less of the total mass of the insecticide composition, and may be 0% by mass.
The proportion of water in the insecticide composition of the present invention can be determined by a moisture measurement method (Karl Fischer method) described in the Japanese Pharmacopoeia.

The insecticide composition of the present invention may or may not optionally contain an insecticidal component. In consideration of safety, it is preferable not to include an insecticidal component.
Here, the term “insecticidal component” means an active component listed in each section of the pharmaceutical product of the pesticide guideline, and an active component that has been approved and formulated in pharmaceuticals, quasi drugs, and miscellaneous goods.
As the insecticidal component, a known insecticidal component can be used, and examples thereof include a pyrethroid insecticide, an organophosphorus insecticide, and a carbamate insecticide.
Examples of pyrethroid insecticides include metfurthrin, dl, d-T80-arethrin, phthalthrin, d-T80-phthalthrin, d, d-T80-praretrin, d, d-T98-praretrin, d-T80-resmethrin, trans Examples include furthrin, imiprotrin, ciphenothrin, d, d-T-cyphenothrin, empentrin, permethrin, phenothrin, etofenprox, pyrethrin.
Further, as insecticides other than pyrethroid insecticides, for example, organophosphorus insecticides such as fenitrothion and malathion; carbamate insecticides such as propoxur and carbaryl; acaricides such as kelsen, quinomethionate and hexathiazox; And neonicotinoid insecticides.
Any one of these insecticide components may be used alone, or two or more thereof may be used in combination.

The insecticide composition of this invention may contain other components other than each above-described component as needed in the range which does not impair the effect of this invention.
The other component is not particularly limited and may be a conventionally known additive, for example, perfumes such as l-menthol, mint oil, and plant essential oil, polymers such as xanthan gum and polyvinylpyrrolidone, glycol, Examples include solvents such as ether.

  The insecticide composition of the present invention can be produced by a conventional method, and is usually produced by mixing each component.

Although the usage method of the insecticide composition of this invention is not specifically limited, Preferably, it sprays and uses directly against a pest.
The form of use of the insecticide composition of the present invention may be any dosage form, such as an aerosol agent, or a spray oil that sprays the composition using a spray device such as a hand pump, trigger, squeeze, etc. Aerosol agents are preferred because they are easy to apply to dwarf pests or flying pests.
When used as an aerosol, the insecticide composition of the present invention is filled with a propellant in an aerosol container. Known aerosol containers and propellants can be used. For example, as a propellant, as long as it is usually used for chemical industry, medicine, cosmetics, etc., it can be used singly or in combination of two or more. Specifically, liquefied petroleum gas (LPG) such as normal butane, isobutane and propane, liquefied gas such as dimethyl ether (DME) and halogenated hydrocarbon; compressed gas such as nitrogen, carbon dioxide and nitrous oxide; However, the present invention is not limited to these.
The ratio of the insecticide composition (stock solution) of the present invention to the propellant in the aerosol can be appropriately selected in consideration of the jetting properties and safety, but usually the mass ratio is undiluted solution / propellant = 1/99 to 90. / 10 is preferable, 20/80 to 80/20 is more preferable, and 30/70 to 70/30 is more preferable.

  As the `` pest '' to which the insecticidal composition of the present invention is applied, cockroaches such as German cockroaches, American cockroaches, black cockroaches, adult mosquitoes such as oyster mosquitoes, scallops, and mosquitoes, fly adults, centipedes, spiders, beetles, abs, Examples include geji, millipede, brackish beetle, black ants, red ants, bugs, stink bugs, bugs, chironomids, butterflies, leafhoppers, moths, scallops, earwigs, trash beetles, cutworms, fleas, bedbugs, and the like. Among these, cockroaches and adult mosquitoes are preferred because the insecticidal effect of the insecticide composition of the present invention is particularly high.

The insecticide composition of the present invention has a high insecticidal effect, and can safely eliminate pests without using the insecticidal component itself. Moreover, it is excellent in stability and excellent in practicality.
The reason for the high insecticidal efficacy of the insecticide composition of the present invention is not clear, but the (A) component has a quaternary ammonium ion in its structure, so that the (B) component and (C) component It is presumed that some kind of interaction is exerted between them and the composition easily enters the insect body including the respiratory system, and the respiratory system can be efficiently sealed.

EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated more concretely, this invention is not limited to the following Example at all.
The components shown in Table 5 were used as the respective components blended in the insecticide compositions of Examples 1 to 18 and Comparative Examples 1 to 12 below. Table 5 shows the product composition (unit: mass%) of cetyltrimethylammonium chloride (liquid, powder), stearyltrimethylammonium chloride, didecyldimethylammonium chloride and dicocoyldimethylammonium chloride used as component (A). It is written together.

<Examples 1-14, Comparative Examples 1-7>
Insecticide compositions having the compositions shown in Tables 1 to 3 (unit: mass%) were prepared by mixing the components. The amounts of cetyltrimethylammonium chloride, stearyltrimethylammonium chloride and dicocoyldimethylammonium chloride shown in Tables 1 to 3 are respectively equivalent to AI (cationic solid content as a solute) and are derived from these products (commercial products used) The amounts of water and isopropyl alcohol contained in the above were separately shown as carry-in amounts.
Each insecticidal composition was subjected to the following efficacy test and stability test. The results are also shown in Tables 1-3.
[Efficacy test]
Each insecticidal composition was filled into a 100 mL PET finger spray container. This was set in an automatic injection device equipped with an air compressor, and the injection amount per time was adjusted to 0.10 to 0.15 g.
Next, the back of the ice-cold cockroach (male) was affixed to the filter paper and set vertically so that the abdomen was 5 cm from the front of the spray nozzle. After spraying each insecticide composition once to the German cockroaches awakened from anesthesia, the German cockroaches were removed from the filter paper and quickly transferred to a polypropylene cup, and the survival state was observed for 5 minutes every 30 seconds. The survival state of each test (one animal test) was evaluated in five stages according to the following evaluation criteria.
(Evaluation criteria for each test (one animal test))
5 points: fatal within 5 minutes.
4 points: Drowned after 5 minutes.
3 points: knocked down after 5 minutes (KD: parasite stiffness).
2 points: Can crawl but move slowly.
1 point: Moves normally.

Moreover, about each insecticide composition, the same test was repeated 10 times (10 cockroaches), and the total score was obtained. The total score was evaluated according to the following evaluation criteria. Of these, 33 or more were judged to be effective.
(Evaluation criteria for each composition (10 total points))
45-50 points: very high efficacy.
39-44 points: very high efficacy.
33-38 points: high efficacy.
28-32 points: Slightly low efficacy.
Less than 28 points: low efficacy.

[Stability test]
Each prepared insecticide composition is filled into a glass bottle with a screw cap (capacity 30 mL) and left to stand for 1 month in a constant temperature room at 25 ° C., and then its appearance is evaluated. evaluated. Among these, ◎, ○, and Δ were judged good.
(Stability evaluation criteria)
A: Colorless and transparent.
○: Transparency slightly decreased and slightly turbid.
Δ: Although slightly turbid on the whole, it becomes transparent when shaken.
▲: The lower part becomes cloudy and tends to settle.
X: Two-layer separation and precipitation clearly.

As shown in the above results, the insecticide compositions of Examples 1 to 14 containing the component (A), the component (B) and the component (C) and substantially free of water have excellent insecticidal efficacy. The stability was also high.
On the other hand, the composition of Comparative Examples 1-2 which does not contain (A) component or (B) component had low insecticidal efficacy. In addition, the composition of Comparative Example 3 containing no component (C) had low stability in addition to the insecticidal efficacy.
Also, the composition of Comparative Example 4 in which a cationic surfactant that is not a quaternary ammonium salt type is blended instead of the component (A), or the composition of Comparative Example 6 in which triacetin is blended instead of the component (C). The composition of Comparative Example 7 having a water content of 5% by mass in the composition had to be shaken during spraying and had a low insecticidal effect. Moreover, stability was also bad. Further, the composition of Comparative Example 5 in which a paraffin wax that was solid at 25 ° C. was blended in place of the component (B) could not be solidified to be formulated and could not be used for the test.

<Examples 15 to 18>
An aerosol was prepared by the following procedure.
First, a stock solution (insecticide composition) having the composition shown in Table 4 was prepared by mixing each component. The amounts of didecyldimethylammonium chloride and cetyltrimethylammonium chloride shown in Table 4 are AI equivalent amounts.
The stock solution and the propellant shown in Table 4 were filled into an aerosol container at a (stock solution / propellant) ratio (mass ratio) shown in Table 4 to obtain an aerosol.

Claims (2)

Selected from the group consisting of quaternary ammonium salt type cationic surfactant (A), hydrocarbon (B) liquid at 25 ° C., isopropyl alcohol, n-propyl alcohol, ethanol and N-methyl-2-pyrrolidone Containing at least one solvent (C) that does not contain an insecticidal component, the content of component (A) is 0.1 to 7% by mass, and the content of component (B) is 70 to 99 % by mass . The insecticide composition wherein the content of component (C) is 0.05 to 10% by mass and the content of water is 3% by mass or less.   The insecticide composition according to claim 1, further comprising at least one ester (D) selected from the group consisting of fatty acid alkyl esters, polyhydric alcohol fatty acid esters, polybasic acid esters, and hydroxy acid esters.