JP2003012422A - Aerosol for flying pest control - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol for exterminating flying pests, which provides a dry feeling that the sprayed surface immediately dries, and is excellent in immediate action against flying pests. SOLUTION: A solvent mainly containing a saturated hydrocarbon and 3-methoxyiminomethyl-2,2-dimethylcyclopropanecarboxylate (2,3,5,6-tetrafluoro-4- (methoxymethyl) phenyl) methyl Is an aerosol in which a mixture comprising a liquid agent and a propellant is contained in a pressure-resistant container provided with a spray port, wherein the weight ratio of the liquid agent to the propellant is 4/6 to 1/9, and the spray particles An aerosol for exterminating flying pests, which is designed so that the volume average particle diameter is 20 to 40 μm.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an aerosol for combating flying pests and a method for combating flying pests.

[0002]

2. Description of the Related Art Conventionally, many products have been developed and sold as aerosols for combating flying pests. As an important application method of the aerosol, there is a method of directly spraying a pest flying in a house or a pest remaining on a wall to treat the fallen pest. In order for this method to be applied, it is desirable that the knockdown effect on the pests be obtained instantaneously, and if the effect is immediately obtained, the exterminated pests can be treated on the spot. However, when using conventional aerosol products, for example, house flies, etc., it is difficult to knock down or crash immediately even if they are directly hit, so they have to be sprayed repeatedly against pests that continue to fly. There were many Since spraying a large amount of aerosol also increases the concentration of the drug in the house, there is a concern that the inhalation of spray particles may affect the sprayer and the like.

Therefore, when it is used in a method of controlling spraying flying pests directly, the sprayed flying pests are immediately knocked down, which allows the pests to be treated on the spot. Development of an extermination aerosol is desired. In addition, by increasing the ratio of the liquid agent in the aerosol and bringing more particles containing the insecticidal component into contact with the pest, (the insecticide content% is the denominator of the aerosol weight,
If the spray amount is the same, the pesticidal aerosol does not change even if the liquid ratio increases.) In many cases, the immediate effect of the pest control aerosol increases, but on the other hand, an aerosol with a high liquid ratio
For example, when spraying toward the flies that are still on the wall, the wall surface may become wet with the liquid agent, and that portion may become conspicuous. Such a phenomenon is not always preferred by the consumer, but rather, a type in which the ratio of the propellant to the liquid agent in the aerosol is high, the surface such as the sprayed wall is immediately dried, and a dry feeling is obtained is preferred. There is a tendency.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a flying pest control aerosol which gives a dry feeling to the extent that the sprayed surface dries immediately and is excellent in immediate effect against flying pests. Especially at a distance of about 1 m,
An object of the present invention is to provide a flying pest control aerosol which has immediate effects such that when the target pest is directly sprayed, the pest knocks down immediately and the user can treat the control pest.

[0005]

Means for Solving the Problems As a result of investigations on flying pest control aerosols, the present inventor not only specifies a solvent species to be used by using a specific insecticidal active ingredient,
It was found that an aerosol designed so that the propellant ratio with respect to the liquid agent in the aerosol is set high, and the sprayed particle size when the aerosol is sprayed can be in a specific range can achieve the above-mentioned object, and the present invention has been achieved. It was

That is, the present invention relates to a solvent mainly containing a saturated hydrocarbon and a compound represented by the formula (1) An aerosol comprising a mixture of a liquid agent and a propellant containing a carboxylic acid ester represented by (4) and a propellant, the weight of the liquid agent and the propellant being contained in a pressure resistant container having a spray port. The present invention relates to a flying pest control aerosol (hereinafter referred to as the present aerosol) having a ratio of 4/6 to 1/9 and a volume average particle diameter of spray particles of 20 to 40 μm.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In the present aerosol, a mixture of a liquid agent containing a solvent mainly containing a saturated hydrocarbon and the present compound as an active ingredient (hereinafter sometimes simply referred to as liquid agent) and a propellant is sprayed. It is contained in a pressure-resistant container with a mouth.

The compound name of this compound is (2,3,5,6-tetrafluoro-4- (methoxymethyl) phenyl) methyl 3-methoxyiminomethyl-2,2-dimethylcyclopropanecarboxylic acid, Although there are optical isomers and geometrical isomers, any of these isomers having insecticidal activity and a mixture containing the isomers can be used in the present aerosol. The present compound is usually 0.01 to 5% by weight, preferably 0.05 to 5% by weight in a liquid preparation.
About 1% by weight is included.

The solvent used in the present aerosol is mainly composed of saturated hydrocarbon, preferably containing 90% by weight or more of saturated hydrocarbon, and more preferably substantially composed of saturated hydrocarbon.
The saturated hydrocarbon preferably contains 90% by weight or more of a saturated hydrocarbon having 11 to 17 carbon atoms, and more preferably consists essentially of saturated hydrocarbon having 11 to 15 carbon atoms.

A commercially available solvent may be used as the solvent consisting essentially of saturated hydrocarbon. Specific examples of such a solvent include neothiozole (trade name, manufactured by Chuo Kasei Co., Ltd.), Norper 12, Norper 13 , Norper 15 (above trade name, manufactured by ExxonMobil Chemical Co.)
Normal paraffin kerosene such as; Isopar H, Isopar L, Isopar M, Isopar V (Note) Isopar V is C13-17: 70%, C18 or more 30%, but I will respond to claims 2 and 3 for the time being. ) (The above product names, manufactured by ExxonMobil Chemical Co., Ltd.), IP-2
028 (trade name, manufactured by Idemitsu Petrochemical Co., Ltd.) and other isoparaffin kerosene; Exol D80, Exol D
110, Exor D130 (Note) Exor D130
C15-17: 80%, C18 or more 20%, but I will mention it because it corresponds to claims 2 and 3) (These are trade names, manufactured by ExxonMobil Chemical Co., Ltd.) and other naphthenic solvents. . These can be used alone or as a mixture of two or more kinds. Among them, neothiozole, norper 12, norper 13, norper 1
Normal paraffin kerosene such as 5 is preferred.

Solvents mainly containing saturated hydrocarbons include esters such as isopropyl myristate, ethyl oleate and acetyltributyl citrate, alcohols such as ethyl alcohol and isopropyl alcohol, diethylene glycol monoalkyl ether and triethylene glycol monoalkyl. It is also possible to contain glycols such as ether, propylene glycol monoalkyl ether, dipropylene glycol monoalkyl ether, tripropylene glycol monoalkyl ether and the like.
The content of these is usually 10% by weight or less in the solvent.

Examples of the propellant in the present aerosol include propane, n-butane, isobutane, dimethyl ether, methyl ethyl ether, methylal and the like, and these may be a mixture of two or more kinds.

The present aerosol is 5 from a spray port when a mixture of a liquid agent and a propellant is sprayed from the present aerosol.
Volume average particle diameter of spray particles at a distance of 0 cm (hereinafter, simply referred to as volume average particle diameter of spray particles means volume average particle diameter of spray particles at a distance of 50 cm from the injection port of the present aerosol). Is designed to be 20 to 40 μm.

The volume average particle diameter of the spray particles can be measured, for example, by using a particle diameter measuring device Model 2600 manufactured by Malvern Instruments Ltd.

The weight ratio of the mixture of liquid agent and propellant is 4
In order to set the volume average particle size of the spray particles of the present aerosol to 20 to 40 μm in the range of / 6 to 1/9, a valve system (a system that combines both a valve and an actuator) according to the initial can pressure of the aerosol. Means.)
It may be adjusted by appropriately selecting specifications such as a hole diameter and a mold of each component constituting the.

As a method of adjusting the particle diameter, first, the case where the weight ratio of the liquid agent and the propellant is 25/75 is given.
51mm, housing hole 0.64mm, equipped with a valve consisting of parts with no vapor tap hole, 3.6K
When a butane / propane mixed liquefied gas of g / cm ² (gauge pressure at 20 ° C.) is filled in such a weight ratio as to the liquid agent, when an actuator having a pore diameter in the range of 0.9 to 2 mm is mounted, the volume average is obtained. Particle size 20 μm-40
An aerosol can be obtained that ejects μm particles.
In addition, the volume average particle diameter of the atomized particles of the aerosol at a certain initial internal pressure is first measured using a certain valve system, and when the volume average particle diameter falls outside the range of 20 μm to 40 μm, for example, the pore diameter of the actuator. Without changing the number of stem holes, increasing the diameter of the stem hole, or, for example, 0.3-0.5 in the housing.
By providing a vapor tap hole of about mm, the volume average particle diameter of the spray particles can be adjusted to a smaller side,
On the other hand, by lowering the pressure of the propellant to be charged, the volume average particle diameter of the spray particles can be adjusted to the larger side, and these can be combined as necessary to adjust the volume average particle diameter of the desired spray particles. . However, if the pressure of the propellant is too low, the reaching distance of the sprayed particles tends to be shortened. Therefore, the initial can pressure of the aerosol at 25 ° C is about 3 kg / cm ² · gauge pressure or more, preferably 4 kg / cm. ^{2. It} is better to have a gauge pressure or higher.

When the weight ratio of the liquid agent to the propellant is about 4/6, the particle size tends to be larger than that of the aerosol having the weight ratio of the liquid agent to the propellant of 25/75 when the valve systems are the same. Therefore, the pore size is smaller, 0.5-1.5m
The volume average particle diameter of the spray particles can be adjusted to the smaller side by selecting an actuator of about m. Specifically, a certain valve system is used to first measure the volume average particle diameter of aerosol spray particles at a certain initial canister pressure, and when the volume average particle diameter falls outside the range of 20 μm to 40 μm, for example, The volume average particle diameter of the spray particles can be adjusted to a smaller side by increasing the stem hole of the valve or providing a vapor tap having a hole diameter of 0.3 mm or more without changing the hole diameter of the actuator. In addition, when the volume average particle diameter of the spray particles is to be increased, it is only necessary to select the parts having the specifications opposite to the above. These can be combined as needed to adjust the volume average particle diameter of the desired spray particles, but at the same time, the initial can pressure of the aerosol is 3 to 6 kg / cm ^{2 at} 25 ° C.
・ It is desirable to keep the pressure within the range of gauge pressure.

When the weight ratio of the liquid agent to the propellant is about 1/9, the particle size tends to be smaller than that of the aerosol having the weight ratio of the liquid agent to the propellant of 25/75 when the valve systems are the same. The use of a lower pressure gas as the propellant to be filled facilitates the adjustment of the volume average particle size of the spray particles. The stem hole of the valve is 0.3 to 0.5 mm, and there is one hole, and the vapor tap diameter of the housing is 0 (none).
~ 0.3 mm, preferably none. The actuator preferably has a hole diameter of 1 to 2 mm or more and an accessory tube for increasing the particle diameter. The volume average particle diameter of the spray particles can be adjusted by the above method, but at the same time, the initial aerosol can pressure is 2.5.
It is desirable to carry out the treatment within a range of about 5 kg / cm ² · gauge pressure.

The initial can pressure of the aerosol varies depending on the solubility of the propellant in the solvent and the volume ratio of the solvent, but propane, n-butane, isobutane, dimethyl ether and the like are appropriately blended to fall within the above can pressure range. Can also be adjusted. Generally, by increasing the weight ratio of the propellant and increasing the ratio of n-butane and isobutane, the initial can pressure of the aerosol can be adjusted so as not to be too high.

In this aerosol, the injection amount during atomization is 2
It is preferably 1 to 2.5 g / sec at 0 ° C.
The injection amount can be adjusted mainly by adjusting the hole diameter of the actuator. The actuator hole is 0.7 ~
2.0 mm, preferably 0.8 to 1.5 mm.

It is also possible to supplement the internal pressure of the present aerosol by enclosing a compressed gas such as nitrogen or carbon dioxide in a pressure resistant container. The injection amount of the mixture of the liquid agent and the propellant when the present aerosol is injected is usually 0.4 to 25 at 25 ° C.
It is 2.5 g / sec, and particularly preferably 1.0 to 2.0.

In the present aerosol, as the aerosol valve forming the flow path of the mixture from the pressure resistant container to the injection port and the injection port, a valve system usually used as an aerosol valve can be mentioned. Examples of the material include ordinary materials, and examples of the material of the metal portion of the valve include tin plate, aluminum, and stainless steel.

Examples of the material of the pressure-resistant container used in the present aerosol include tin plate, aluminum, stainless steel, and pressure-resistant resin, and a container whose inside is coated with an epoxy resin or the like can also be used.

One or more kinds of synergists, perfumes and the like can be blended in the present aerosol. Further, one or more kinds of insecticidal active ingredients other than the present compound may be further blended depending on the application.

Examples of the insecticidal active ingredient include pyrethroid compounds such as allethrin, tetramethrin, prarethrin, phenothrin, resmethrin, cyphenothrin, permethrin, cypermethrin, deltamethrin, cyfluthrin, flamethrin and etofenprox. Further, carbamate compounds such as methoxadiazone and propoxer, and organic phosphorus compounds such as dichlorobos and fenitrothion can be exemplified.

Examples of synergists include PBO (piperonyl butoxide), MGK264 (N- (2-ethylhexyl) bicyclo [2.2.1] hept-5-ene-
2,3-dicarboximide), S421 (octachlorodipropyl ether) and the like.

The present aerosol can be prepared in the same manner as an ordinary aerosol. For example, a method of injecting a liquid agent containing the present compound and a solvent into a pressure resistant container and then enclosing the propellant, or the present compound and the solvent. If necessary, other components may be separately injected into the pressure resistant container, and then the propellant may be enclosed.

The following are examples of flying pests which the aerosol can exert its effect. Culex pipiens,
Culex mosquitoes and other mosquitoes, Aedes aegypti, Aedes albopictus and other mosquitoes, Anopheles sycamore, etc. , Diptera such as Drosophila, Drosophilidae, Musca, Gnats, and Plutidae, and Lepidopteran pests such as Mussels and Koga.

The extermination of flying pests with this aerosol is usually carried out by spraying the mixture of the liquid agent and the propellant constituting this aerosol directly onto the pests on the wall or the like. It can be done by direct hitting.

[0030]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. The "parts" used in the examples mean parts by weight unless otherwise specified. Formulation Example 1 (1R, 3R) -3-[(E)-(Methoxyimino) methyl] -2,2-dimethylcyclopropanecarboxylic acid [2,3,5,6-terafluoro-4- (methoxymethyl) phenyl] Methyl and (1R, 3R) -3-[(Z)
1: 1 with [2,3,5,6-terafluoro-4- (methoxymethyl) phenyl] methyl- (methoxyimino) methyl] -2,2-dimethylcyclopropanecarboxylic acid
To 0.127 parts of the mixture (compound of the following formula (2)), neothiozole (saturated hydrocarbon, saturated hydrocarbon number 12-1)
4, manufactured by Chuo Kasei Co., Ltd.) was added to make 25 parts, and then mixed to obtain a mixed solution. The mixed solution was filled in an aerosol container. After crimping an aerosol valve (manufactured by Japan Precision Co., Ltd., stem hole diameter 0.46 mm, housing main hole diameter 0.76 mm, no vapor tap) into the aerosol container,
75 parts by weight of liquefied petroleum gas (manufactured by Air Water Co., Ltd.) was filled, and an aerosol actuator (manufactured by Toyo Aerosol Co., Ltd., hole diameter 1.5 mm, nozzle structure: straight type,
This aerosol 1 was obtained by mounting (with an extension tube). Aerosol can pressure is 4.6 kg
/ Cm ² · gauge pressure (25 ° C.), the volume average particle size of the spray particles of the present aerosol 1 measured by a particle size measuring device (measured using Malvern particle size measuring device Model 2600) was 32 μm. The injection speed was 1.73 g / sec.

Formula (2) compound

Example 2 Aerosol valve (manufactured by Nippon Precision Co., Ltd., stem hole diameter 0.51 mm × 2, housing main hole diameter 0.76 mm, vapor tap hole diameter 0.46 mm), aerosol can pressure is 2.7 kg / c.
This aerosol 2 was obtained in the same manner as in Example 1 except that the pressure was m ² · gauge pressure (25 ° C.). The volume average particle diameter of the spray particles of the present aerosol 2 (measured in the same manner as in Example 1) is 4
It was 0 μm. The injection speed was 1.54 g / sec.

Example 3 An aerosol valve (manufactured by Japan Precision Co., Ltd., stem hole diameter 0.51 mm × 2, housing main hole diameter 2.03 mm, vapor tap (VT) hole diameter 0.51 mm) was used, and liquefied petroleum gas was used instead of liquefied petroleum gas. This aerosol 3 was obtained in the same manner as in Example 1 except that a mixed gas of (3.5 kg / cm ² · gauge pressure (20 ° C.)) / Dimethyl ether = 1/1 (weight ratio) was used. Aerosol can pressure is 5.4kg / c
m ² · gauge pressure (25 ° C). The volume average particle diameter of the spray particles of the present aerosol 3 (measured in the same manner as in Example 1) is 27.
was μm. The injection speed was 2.20 g / sec.

Example 4 Using an aerosol valve (manufactured by Japan Precision Co., Ltd., stem hole diameter 0.46 mm, housing main hole diameter 0.46 mm, no vapor tap), an aerosol actuator (manufactured by Japan Precision Co., Ltd., hole diameter 1.02 mm, nozzle structure: straight) This aerosol 4 was obtained in the same manner as in Example 1 except that the (type) was used. Aerosol can pressure is 4.5 kg / cm ²
-Gauge pressure (25 ° C). The volume average particle diameter of the spray particles of the present aerosol 4 (measured in the same manner as in Example 1) is 21 μm.
Met. The jet speed was 1.11 g / sec.

Comparative Example 1 Comparative aerosol 1 was obtained in the same manner as in Example 4 except that an aerosol actuator (manufactured by Japan Precision Co., Ltd., hole diameter 0.84 mm, nozzle structure: straight type) was used.
Aerosol can pressure is 4.5kg / cm ² · Gauge pressure (25
C). The volume average particle diameter of the spray particles of Comparative Aerosol 1 (measured in the same manner as in Example 1) was 18 μm. The jet speed was 1.11 g / sec.

Comparative Example 2 Comparative aerosol 2 was obtained in the same manner as in Example 3 except that an aerosol actuator (manufactured by Japan Precision Co., Ltd., hole diameter 0.41 mm, nozzle structure: straight type) was used.
Aerosol can pressure is 5.4 kg / cm ² · gauge pressure (25
C). The volume average particle diameter of the spray particles of Comparative Aerosol 2 (measured in the same manner as in Example 1) was 9 μm. The injection speed was 0.64 g / sec.

Comparative Example 3 Comparative Aerosol 3 was obtained in the same manner as in Example 2 except that an aerosol valve (manufactured by Japan Precision Co., Ltd., stem hole diameter 0.46 mm, housing main hole diameter 0.76 mm) was used. Aerosol can pressure is 2.7 kg / cm ² · gauge pressure (25
C). The volume average particle diameter of the spray particles of Comparative Aerosol 3 (measured in the same manner as in Example 1) was 55 μm. The injection speed was 1.56 g / sec.

Comparative Example 4 Comparative Aerosol 4 was obtained in the same manner as in Example 4 except that an aerosol actuator (manufactured by Toyo Aerosol Co., Ltd., hole diameter 1.5 mm, nozzle structure: straight type, with extension tube) was used. Aerosol can pressure is 4.5
kg / cm ² · gauge pressure (25 ° C). Comparison aerosol 4
The volume average particle diameter (measured in the same manner as in Example 1) of the above-mentioned spray particles was 49 μm. The injection speed is 1.12 g /
It was seconds.

Test Example 1 A group of 10 housefly adults (5 males and 5 females)
Nylon net cage (diameter 20 cm, height 20 c
m), tied the mouth of the net, and the housefly escaped from inside.
I decided not to. Inner dimension 1.8 m cubic box wall height
An injection hole with a diameter of 10 cm is provided at 1.55 m.
100cm from the center and 1.55cm in height.
The net cage was hung from the ceiling. Each from the spray hole
Spray 1.0g of aerosol toward the center of the cage
And the housefly knock dow in the time elapsed since spraying
I counted the number. Observed for up to 300 seconds and the results obtained
To KT ₉₀Value (90% of the tested house flies are knockers
Time) was calculated by the probit method.

[0040]

[Table 1]

[0041]

EFFECTS OF THE INVENTION According to the present invention, it is possible to provide an aerosol for combating flying pests, which is extremely excellent in immediate effect.

Claims (7)

[Claims] 1. A solvent mainly comprising a saturated hydrocarbon and a compound of formula (1) Is a aerosol containing a mixture of a liquid agent and a propellant containing a carboxylic acid ester represented by the formula (1), and the weight ratio of the liquid agent and the propellant is 4/6 to 1 Aerosol for controlling flying insect pests, which is designed to have a volume average particle diameter of spray particles of 20 to 40 μm. 2. The aerosol for controlling flying insect pests according to claim 1, wherein the solvent containing mainly saturated hydrocarbon is a solvent containing 90% by weight or more of saturated hydrocarbon. 3. The aerosol for controlling flying insect pests according to claim 1, wherein the solvent containing mainly saturated hydrocarbon is a solvent consisting essentially of saturated hydrocarbon. 4. 90% by weight or more of saturated hydrocarbon has 1 carbon atom
The flying pest control aerosol according to any one of claims 1 to 3, which is a saturated hydrocarbon of 1 to 17. 5. A saturated hydrocarbon has substantially 11 to 17 carbon atoms.
The flying pest control aerosol according to any one of claims 1 to 4, which is composed of only one. 6. The flying pest control aerosol according to claim 1, further comprising one or more pyrethroid compounds. 7. A solvent containing mainly saturated hydrocarbon and 3-methoxyiminomethyl-2,2-dimethylcyclopropanecarboxylic acid (2,3,5,6-tetrafluoro-4- (methoxymethyl) phenyl) methyl. A liquid agent and a propellant containing and a weight ratio of the liquid agent and the propellant is 4/6 to 1
A method for controlling flying pests, which comprises spraying the mixture of 9/9 onto the flying pests.