JP2023075253A - Aerosol product for exterminating creeping insect pest - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol product for exterminating a creeping insect pest capable of being used safely to any place in a room, high in versatility, and facilitating extermination treatment dispensing with a big apparatus.

SOLUTION: An aerosol product for exterminating a creep insect pest includes: an insecticidal active constituent for exterminating a creeping insect pest; a solvent for dissolving the insecticidal active constituent; a jetting agent for jetting the insecticidal active constituent and the solvent; and an aerosol container for housing the insecticidal active constituent, the solvent, and the jetting agent, where the weight ratio (liquid:jetting agent) of the jetting agent housed in the aerosol container and liquids other than the jetting agent is set so as to be within the range of 8:92-30:70, the aerosol container is quantitative injection type, and provided with a push-down type operational button fitting to a jetting pipe that the aerosol container has, and the operational button has a nozzle part communicating with the jetting pipe.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2023,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to, for example, a method for exterminating crawling pests, and in particular belongs to the technical field related to aerosols that are effective against cockroaches that lurk deep in gaps in a room.

For example, cockroaches hide in narrow crevices in a room, and nest and breed on the back and bottom surfaces of furniture, electrical appliances, and the like. As a device for exterminating cockroaches lurking in such narrow spaces, for example, a sanitary pest repelling device disclosed in Patent Document 1 is known. In Patent Document 1, a drug diffusion platform is provided at the bottom of furniture, electrical appliances, etc., a space for diffusing a repellent drug is defined inside the drug diffusion platform, and an injection nozzle is provided in the space inside the drug diffusion platform. is designed to inject a repellent agent. An aerosol container containing a repellent agent is connected to the injection nozzle by a connecting tube, and the repellent agent in the aerosol container is injected from the injection nozzle through the connecting tube into the space inside the drug diffusion platform. It's becoming

JP-A-2003-164248

However, since the drug diffusion base ring part of the device of Patent Document 1 is provided at the lower part of furniture, electrical appliances, etc., the repellent drug does not reach the back of the furniture, for example. Therefore, in the case of the device of Patent Document 1, it is considered that the device is almost ineffective against cockroaches hiding behind furniture.

In addition, since the drug diffusion frustum can be provided only when the furniture is installed, it is difficult to install the device of Patent Document 1 after the furniture is installed. In addition, there is also the problem that the drug diffusion base ring part must be produced in accordance with the shape and size of the furniture, resulting in low versatility.

Furthermore, the device of Patent Document 1 requires an injection nozzle corresponding to the size of the drug diffusion ring portion, a connecting tube for connecting the aerosol container and the injection nozzle, etc., in addition to the drug diffusion ring portion. Therefore, it becomes a large-scale device.

Further, when the repellent agent is injected into a closed space such as a room, it is preferable from the viewpoint of safety that the amount of the repellent agent injected at one time is equal to or less than a specified amount.

The present invention has been made in view of this point, and its object is to be able to use it safely anywhere in the room, to have high versatility, and to eliminate the need for a large-scale device. To facilitate extermination processing.

In order to achieve the above object, in the present invention, the proportion of the propellant contained in the aerosol container is increased, and the vapor pressure of the solvent that dissolves the insecticidal active ingredient is lowered to form particles that are ejected from the aerosol container. By slowing the evaporation rate of the solvent contained in the particles, the particles were made to fly over a wide range.

The first invention is
an insecticidal active ingredient that exterminates cockroaches;
a solvent in which the insecticidal active ingredient dissolves;
a propellant for injecting the insecticidal active ingredient and the solvent;
In an aerosol product for exterminating cockroaches, comprising an aerosol container containing the insecticidal active ingredient, the solvent, and the propellant,
The vapor pressure of the solvent at 25°C is 7.0 kPa or less,
The weight ratio of the propellant contained in the aerosol container and the liquid other than the propellant is set to be within the range of 8:92 to 30:70 when the liquid:propellant is used. ,
The aerosol container has a nozzle portion, and the insecticidal active ingredient and the solvent are injected from the nozzle portion into the gap between the indoor wall and the furniture or between the indoor wall and the electrical appliance by one operation of the injection button. It is characterized by being a constant injection type that injects only a predetermined amount.

According to this configuration, since the weight ratio of the liquid to the propellant is within the range of 8:92 to 30:70, the formulation is rich in propellant. As a result, when the liquid containing the insecticidal active ingredient and the solvent is sprayed from the aerosol container, it tends to become small particles, the momentum of the particles is strong, and the sprayed particles fly over a wide range and are in the air. It becomes easy to drift in. Furthermore, since the vapor pressure of the solvent at 25° C. is 7.0 kPa or less, which is sufficiently low, the evaporation rate of the solvent forming the sprayed particles is slowed, which causes the particles to fly far. Along with this, the time spent floating in the air increases. Therefore, for example, assuming the case of spraying between the wall and the furniture, the particles containing the insecticidal active ingredient fly to the back along the side of the furniture, and then wrap around to the back side of the furniture and along the back. It flies by and floats in the air, and then falls to the bottom of the furniture due to its own weight. In this way, since the particles fly over a wide range even in a narrow gap, the effect of the insecticidal active ingredient can be exhibited over a wide range without providing a large-scale device.

In addition, since the aerosol container is a metered injection type, even if the particles fly over a wide area as described above, the amount of insecticidal active ingredient will not be sprayed in excess of the specified amount, which increases safety and is easy to handle. become easier. Furthermore, unlike the conventional art, the place of use is not limited to under furniture, etc., so versatility is enhanced.

A second invention is based on the first invention,
The insecticidal active ingredient is characterized in that it is at least one of cyphenothrin, cyfluthrin and tralomethrin.

According to this configuration, even if the amount of the insecticidal active ingredient is small, high efficacy against creeping pests can be obtained.

A third invention is the first or second invention,
The injection amount of the insecticidal active ingredient by one operation of the injection button is set to 3 mg or more and 20 mg or less.

According to this configuration, since 3 mg or more of the insecticidal active ingredient is ejected by one injection operation, even if the particles are scattered over a wide range, the insecticidal active ingredient contained in each particle is sufficiently secured. High potency is obtained. On the other hand, since the amount of the insecticidal active ingredient injected per injection operation is 20 mg or less, high safety is ensured when used in a closed room, for example.

A fourth invention is any one of the first to third inventions,
The solvent is characterized by being at least one of isopropyl myristate and a saturated hydrocarbon solvent.

That is, ethanol (vapor pressure 7.91 kPa at 25 ° C.) is a commonly used solvent, but by using isopropyl myristate and a saturated hydrocarbon solvent, the vapor pressure of the solvent is lower than that of ethanol. Become. This causes the solvent forming the jetted particles to evaporate much slower and the particles to linger in the air for a longer period of time.

A fifth invention is any one of the first to fourth inventions,
A jet amount of the liquid other than the propellant by one operation of the jet button is set to 0.1 ml or more and 0.4 ml or less.

A sixth invention is an insecticidal active ingredient that exterminates cockroaches,
a solvent in which the insecticidal active ingredient dissolves and which has a vapor pressure of 7.0 kPa or less at 25° C. and lower than that of ethanol;
The insecticidal active ingredient and the propellant for injecting the solvent are contained in a metered injection type aerosol container that injects a predetermined amount of the insecticidal active ingredient and the solvent with one operation of the injection button, and the injection is performed. setting the weight ratio of the agent to the liquid other than the propellant to be within the range of 8:92 to 30:70 when the liquid:propellant is
In the method for exterminating crawling pests, a predetermined amount of the insecticidal active ingredient and the solvent are sprayed upward from the nozzle portion of the aerosol container into the gap between the wall of the room and the furniture or the gap between the wall of the room and the electrical appliance.

According to the first and sixth inventions, the ratio of the propellant in the aerosol is increased and the vapor pressure of the solvent that dissolves the insecticidal active ingredient is lowered to slow down the evaporation rate of the solvent that forms the sprayed particles. Therefore, the particles can be dispersed over a wide range, and the effect of the insecticidal active ingredient can be exhibited over a wide range without providing a large-scale device. In addition, since the aerosol container is of fixed injection type, the amount of the insecticidal active ingredient will not exceed the specified amount. Therefore, it can be used safely anywhere in the room and has high versatility.

According to the second invention, since the insecticidal active ingredient is at least one of cyphenothrin, cyfluthrin and tralomethrin, even if the amount of the insecticidal active ingredient is small, high efficacy against creeping insects can be obtained, and the injection button can be pressed once. It is possible to reduce the injection amount by the operation of .

According to the third invention, the injection amount of the active insecticidal ingredient per operation of the injection button is 3 mg or more and 20 mg or less, so high safety can be ensured while obtaining high efficacy of the active insecticidal ingredient.

According to the fourth invention, the solvent is at least one of isopropyl myristate and a saturated hydrocarbon solvent, so that the particles ejected from the aerosol container can be suspended in the air for a longer period of time. The effectiveness of the active ingredient is further enhanced.

According to the fifth invention, it can be used safely anywhere in the room and has high versatility.

1 is a perspective view of a crawling pest control aerosol product; FIG. 1 is a schematic diagram illustrating a test environment in a test room; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. It should be noted that the following description of preferred embodiments is essentially merely illustrative, and is not intended to limit the invention, its applications, or its uses.

FIG. 1 is a perspective view of an aerosol product 1 for exterminating creeping pests according to an embodiment of the present invention. An aerosol product 1 for exterminating crawling pests includes an aerosol container 10, a push-down type operation button (injection button) 20, a tubular base 30 attached to the aerosol container 10, and a tubular cover 40 attached to the tubular base 30. It has By rotating the operation button 20 and the cylindrical cover 40, the operation button 20 can be switched between a depressible state in which the operation button 20 can be depressed and a non-depressable state in which the operation button 20 cannot be depressed. It is configured.

In the description of this embodiment, the left side and the right side viewed from the user when the user holds and uses the device are simply referred to as "left" and "right", respectively, and are the front side viewed from the user. The side is simply referred to as "rear", and the back side as seen from the user is simply referred to as "front".

The peripheral wall portion of the aerosol container 10 is translucent so that the remaining amount of the contents can be grasped from the outside. A constant injection valve mechanism (not shown) is provided on the upper portion of the aerosol container 10 . This valve mechanism includes a discharge pipe (not shown) that moves vertically and discharges the content contained in the aerosol container 10, and a biasing member such as a spring that biases the discharge pipe upward. (not shown) and a valve body (not shown). The discharge pipe extends vertically, and when it is at the upper end position, the lower end (upstream end) of the discharge pipe is closed by the valve body so that the inside of the aerosol container 10 and the discharge pipe are not communicated with each other. On the other hand, when the discharge pipe is pushed downward from the upper end position, the lower end of the discharge pipe is opened and the inside of the aerosol container 10 and the discharge pipe communicate with each other, and the contents are discharged from the upper end of the discharge pipe. The valve mechanism is configured so that Further, when the discharge pipe is pushed once, the lower end of the discharge pipe is momentarily opened and then closed, and a small amount (predetermined amount) of the contents is injected. In other words, this aerosol container 10 is of the constant injection type. Incidentally, as the metered injection type aerosol container 10, for example, a container described in JP-A-2014-28631 can be used.

The operation button 20 can be obtained, for example, by injection molding a resin material, and is integrally molded as a whole. The operation button 20 is fitted to the upper side of the discharge pipe of the aerosol container 10 and is for pushing the discharge pipe, and has a button body 21 and a nozzle portion 23 . The nozzle portion 23 protrudes from the front portion of the button body 21 .

The nozzle portion 23 protrudes forward in a direction that intersects the center line of the discharge pipe, and is inclined upward toward the front. The base end side of the nozzle portion 23 communicates with the discharge pipe 13 of the aerosol container 10 . The inclination angle of the nozzle portion 23 can be set, for example, within a range of 5 degrees or more and 45 degrees or less between the center line of the discharge pipe and a plane perpendicular to the plane. By inclining the nozzle part 23, it is possible to effectively discharge the contents obliquely upward.

The cylindrical base 30 is formed in a cylindrical shape that extends vertically and has an outer diameter that is substantially the same as the outer diameter of the middle portion of the aerosol container 10 in the vertical direction. The lower end portion of the cylindrical base 30 is entirely open, and the upper portion of the aerosol container 10 is inserted from the lower end portion of the cylindrical base 30 and fixed.

The tubular cover 40 is formed to surround the operation button 20 and is attached to the tubular base 30 . That is, the lower side of the tubular cover 40 is fitted to the upper side of the tubular base 30 . In this state, the outer peripheral surface of the button body 21 of the operation button 20 is covered with the cylindrical cover 40 . A nozzle portion 23 of the operation button 20 protrudes forward from a notch portion 41 provided in the front portion of the tubular cover 40 .

The contents housed in the aerosol container 10 are an insecticidal active ingredient for exterminating crawling pests, a solvent in which the insecticidal active ingredient dissolves, and a propellant for injecting the insecticidal active ingredient and the solvent. The contents may contain an insecticidal active ingredient, a solvent, a drug other than a propellant, and the like. For example, a repellent for crawling pests, a fragrance, a bactericide, a disinfectant, and the like can be mixed with the contents. The type of creeping pest repellent is not particularly limited, and any agent having an effect of repelling creeping pests may be used.

The insecticidal active ingredient is an ingredient that exerts an insecticidal effect on creeping pests, and various chemicals that are used as insecticides can be used. In this embodiment, synthetic pyrethroids can be used, specifically at least one of cyphenothrin, cyfluthrin, and tralomethrin, and mixtures thereof can be used. By using at least one of cyphenothrin, cyfluthrin, and tralomethrin, sufficient efficacy can be obtained even if the injection amount of the active insecticidal ingredient is smaller than when using, for example, imiprothrin, phthalthrin, or resmethrin.

The solvent preferably dissolves the insecticidal active ingredient and has a lower vapor pressure than ethanol. The vapor pressure of the solvent at 25°C is preferably 7.0 kPa or less, more preferably 4.5 kPa or less, still more preferably 1.9 kPa or less. Most preferably, the solvent has a vapor pressure of 0.7 kPa or less at 25°C. As such a solvent, for example, at least one of isopropyl myristate and a saturated hydrocarbon solvent can be used, and a mixture thereof may be used.

Examples of the solvent include propanol (vapor pressure at 25° C. 4.41 kPa), water (3.2630 kPa), octane (1.8874 kPa), nonane (6.177×10 ² Pa), dodecane (6.177×10 2 Pa). 1.80 × 10 Pa), tridecane (7.5 Pa), isopropyl myristate (1.247 × 10 ^-2 Pa), etc., but are not limited to these and are included in the above vapor pressure range. Various solvents can be used. One type of solvent may be used alone, or a plurality of types may be mixed and used.

When the vapor pressure of the solvent at 25° C. exceeds 7.0 kPa, the evaporation rate of the solvent forming the sprayed particles increases, resulting in an early decrease in the mass of each particle, resulting in particle scattering. The shorter the distance, the shorter the time spent floating in the air. This means less potency. On the other hand, when the vapor pressure of the solvent at 25° C. is 7.0 kPa or less, the vapor pressure is sufficiently low, so that the evaporation rate of the solvent forming the sprayed particles slows down, which causes the particles to evaporate. The longer it flies, the longer it stays in the air. In particular, when the vapor pressure at 25° C. is 1.9 kPa or less, the flight distance of the particles is remarkably increased, and the time during which they are floating in the air is also remarkably increased, which is preferable.

As the propellant, liquefied petroleum gas (LPG), dimethyl ether (DME), or the like can be used, and a mixture thereof may be used.

As described above, the aerosol container 10 contains a propellant and a liquid other than the propellant. The weight ratio of the propellant and the liquid other than the propellant is set to be within the range of 8:92 to 30:70 when the above liquid:propellant is used, and this aerosol for exterminating crawling pests Product 1 has a propellant-rich formulation. As a result, when the liquid containing the insecticidal active ingredient and the solvent is sprayed from the aerosol container 10, it tends to become small particles, the momentum of the particles increases, and the sprayed particles fly over a wide range, Easier to float in the air.

That is, if the amount of propellant is less than the liquid:propellant weight ratio of 30:70, the particles become larger when the liquid containing the insecticidal active ingredient and the solvent is ejected from the aerosol container 10. As a result, the weight per particle becomes heavy, it becomes difficult to drift in the air, and it falls before it flies over a wide range. In addition, when the weight ratio of the liquid to the propellant is less than the weight ratio of 30:70, the amount of the liquid is increased. More than the ratio results in too much of the liquid being sprayed at one time, which also increases the weight per particle and makes it difficult to float in the air. On the other hand, when the weight ratio of the liquid to the propellant is more than 8:92, the amount of the liquid sprayed at one time is too small, and the particles do not fly densely over a wide range, resulting in an insecticidal effect. Ingredients are less effective. Therefore, assuming a propellant-rich formulation, it is preferable to set the liquid:propellant weight ratio within the range of 8:92 to 30:70. More preferably, the liquid:propellant weight ratio ranges from 10:90 to 20:80, more preferably from 15:85 to 17:83.

The injection amount of the insecticidal active ingredient by one operation of the operation button 20 (hereinafter also referred to as the Ai amount) is set to 3 mg or more and 20 mg or less. The amount of Ai can be set within the above range by changing the content of the insecticidal active ingredient and the amount of liquid ejected by one operation of the operation button 20 . If the amount of Ai is less than 3 mg, too little of the active insecticidal ingredient is sprayed into the space, resulting in a reduced effect of the active insecticidal ingredient. On the other hand, if the amount of Ai is more than 20 mg, a large amount of the insecticidal active ingredient will be sprayed into the space, which may be undesirable from the standpoint of safety, especially in narrow spaces.

In addition, the injection amount of the liquid (insecticidal active ingredient and solvent) by one operation of the operation button 20 is set to 0.1 ml or more and 0.4 ml or less. The injection amount of the liquid by one operation of the operation button 20 can be set within the above range by changing the structure of the valve mechanism. If the amount of the liquid sprayed by one operation of the operation button 20 is less than 0.1 ml, the amount of the active insecticidal ingredient sprayed into the space is too small, resulting in a reduction in the effect of the active insecticidal ingredient. On the other hand, if the amount of the liquid sprayed by one operation of the operation button 20 is more than 0.4 ml, the amount of the insecticidal active ingredient sprayed into the space increases, which is not preferable in terms of safety especially in narrow spaces. is assumed.

Next, the case of using the crawling pest extermination aerosol product 1 configured as described above will be described. Although the aerosol product 1 for exterminating creeping pests may be sprayed into the entire room, it is preferable to spray into crevices in the room where creeping pests are likely to hide. That is, for example, the operation button 20 is operated after the nozzle part 23 of the aerosol product 1 for exterminating creeping pests is aimed at a narrow gap between an indoor wall and furniture or a narrow gap between a wall and an electric appliance. . It is preferable to operate the operation button 20 only once, but if the room is large, it may be operated multiple times.

As a result, the insecticidal active ingredient and the solvent are jetted together with the propellant from the nozzle portion 23 by the pressure of the propellant contained in the aerosol container 10 . At this time, since the weight ratio is set as described above and the propellant is a rich formulation, when the liquid containing the insecticidal active ingredient and the solvent is jetted from the aerosol container 10, it is formed into small particles. In addition, the momentum of the particles becomes stronger, and the ejected particles fly over a wide range and become more likely to float in the air. In addition, the low vapor pressure of the solvent slows the evaporation rate of the solvent forming the propelled particles, which causes the particles to travel farther and remain in the air longer. . Therefore, after the particles containing the insecticidal active ingredient fly deep along the sides of furniture and electrical appliances, they wrap around to the back side of them, fly along the back side, drift in the air, and then float in the air due to their own weight. Drop down near the bottom. In this way, since the particles fly over a wide range even in a narrow gap, the effect of the insecticidal active ingredient can be exhibited over a wide range without providing a large-scale device.

The height of the nozzle portion 23 during jetting is preferably about 100 cm from the floor surface. This is because if the nozzle portion 23 is too low, the amount of diffusion of the particles in the upward direction is reduced, making it difficult for the particles to enter the rear side.

In addition, since the aerosol container 10 is a fixed injection type, even if the particles fly over a wide range as described above, the amount of the insecticidal active ingredient will not be injected more than the specified amount, which increases safety and improves handling. becomes easier. Furthermore, unlike the conventional art, the place of use is not limited to under furniture, etc., so versatility is enhanced.

Next, the efficacy test results of the aerosol product 1 for exterminating creeping pests will be described. Efficacy testing was conducted in a peat chamber 100 as shown in FIG. The peat chamber 100 has a cubic shape with sides of 180 cm and a volume of 5.82 m ³ . In the peat chamber 100, three pieces of furniture 102, 102, 102 are reproduced with a plurality of cardboard boxes 101. The dimensions of each piece of furniture 102 are 52 cm deep, 160 cm high and 52 cm wide. Also, the gap between adjacent pieces of furniture 102, 102 is set to 5 cm. The gap between the side of the furniture 102 located on the left side of FIG. 2 and the wall of the peat chamber 100 is set to 5 cm, and the gap between the back of the furniture 102 and the wall of the peat chamber 100 is also set to 5 cm. In addition, although furniture is assumed in FIG. 2, it is not limited to this, and may be electrical appliances (for example, a refrigerator, a washing machine, etc.).

The nozzle portion 23 of the crawling pest control aerosol product 1 is directed to the gap between the side of the furniture 102 and the wall of the peat chamber 100 located on the left in FIG. The height of the nozzle portion 23 from the floor is set to 100 cm.

A first mesh bag 104 is arranged at a distance of 50 cm from the tip of the nozzle part 23 toward the back of the gap, and this first mesh bag 104 is attached to the wall of the peat chamber 100 . Similarly, the second mesh bag 105 is arranged at a distance of 100 cm from the tip of the nozzle portion 23 toward the back of the gap (on the back side of the furniture 102), and a distance of 150 cm from the tip of the nozzle portion 23 toward the back of the gap. The third mesh bag 106 is arranged at the end of the gap, the fourth mesh bag 107 is arranged at a distance of 200 cm from the tip of the nozzle part 23 toward the inside of the gap, and the nozzle part 23 is arranged at a distance of 250 cm from the tip of the nozzle part 23 toward the inside of the gap. A fifth mesh bag 108 is placed in place. The heights of the first to fifth mesh bags 104 to 108 decrease with distance from the tip of the nozzle part 23, and the fifth mesh bag 108 is arranged near the floor surface of the peat chamber 100. FIG.

In the first to fifth mesh bags 104 to 108, ten female adult black cockroaches are placed as test insects. The first to fifth mesh bags 104 to 108 allow air to flow easily.

After that, the operation button 23 is operated. The injection amount of the liquid other than the propellant by one operation of the operation button 20 is set to 0.2 ml.

After spraying, the insects are left for 5 minutes, and after 5 minutes, the first to fifth mesh bags 104 to 108 are collected and the test insects are taken out. The removed test insects were transferred to a clean container and given sugar water. Mortality rate was calculated 48 hours after transfer to the container.

In Examples 1 to 10 of the present invention and Comparative Examples 1 to 10, as shown in Table 1, the amount of Ai, the type of solvent, the type of propellant, and the liquid-gas ratio are set. "IPM" of the solvent is isopropyl myristate, and "Neothio" is neothiosol (manufactured by Chuo Kasei Co., Ltd.) as a saturated hydrocarbon solvent. The "liquid to gas ratio" is the liquid to propellant weight ratio. Mortality rate (%) after 48 hours was determined by (tested insects that died/total tested insects)×100. "50 cm", "100 cm", "150 cm", "200 cm", and "250 cm" are the distances from the tip of the nozzle part 23 and indicate the locations where the first to fifth mesh bags 104 to 108 are arranged. there is That is, the mortality rate at "50 cm" is the mortality rate of the test insects contained in the first mesh bag 104, and the mortality rate at "100 cm" is the mortality rate of the test insects contained in the second mesh bag 105. The mortality rate at "150 cm" is the mortality rate of the test insects in the third mesh bag 106, and the mortality rate at "200 cm" is the mortality rate of the test insects in the fourth mesh bag 107. and the mortality rate at “250 cm” is the mortality rate of the test insects contained in the fifth mesh bag 108 . In addition, "-" means that the fatality rate has not been obtained.

In Examples 1 to 10, the liquid:propellant weight ratio is in the range of 8:92 to 30:70, and the vapor pressure of the solvent at 25 ° C. is 7.0 kPa or less, which is lower than that of ethanol. Even at a distance of 250 cm from the tip of the part 23, the fatality rate is 80% or more.

On the other hand, Comparative Example 1 differs from Example 1 only in the liquid:propellant weight ratio, and the liquid:propellant weight ratio in Comparative Example 1 is set to 6:94. In Comparative Example 1, the fatality rate at a distance of 250 cm from the tip of the nozzle portion 23 is only 30%. This is because when the amount of propellant is too large, the amount of the liquid sprayed at one time is too small, and the particles do not fly densely over a wide area, resulting in a marked reduction in the effect of the active insecticidal ingredient.

In Comparative Examples 2 and 3, ethanol is used as the solvent. In Comparative Example 2, the lethality rate is only 60% at a distance of 250 cm from the tip of the nozzle portion 23. In Comparative Example 3, the fatality rate is only 60% at a distance of 250 cm from the tip of the nozzle portion 23. Only 50% fatality rate. This is because the high vapor pressure of ethanol evaporates the ejected particles before they fly far, resulting in a short flight distance of the particles.

In Comparative Example 4, the solvent is ethanol, and the liquid:propellant weight ratio is set to 50:50. In Comparative Example 4, the fatality rate at a distance of 250 cm from the tip of the nozzle portion 23 is only 20%. This is because the above-mentioned relationship between the vapor pressure of ethanol and the propellant is not rich, so when the liquid is jetted from the aerosol container 10, it is difficult for the liquid to become small particles and the jetted particles are less likely to fly over a wide range. be.

In Comparative Example 5, the liquid:propellant weight ratio is set to 50:50. In Comparative Example 5, the fatality rate at a distance of 250 cm from the tip of the nozzle portion 23 is only 20%. This is because, since the propellant is not rich, when the liquid is jetted from the aerosol container 10, it is difficult for the liquid to become small particles and the jetted particles are less likely to fly over a wide range. Similarly, even in Comparative Example 6, the lethality rate is worse.

In Comparative Examples 7 to 9, since the solvent is ethanol, even if the weight ratio of liquid to propellant is changed, the fatality rate is worse.

In Comparative Example 10, the weight ratio of the liquid to the propellant was set to 40:60, but since the amount of the propellant was small, the particles were less likely to fly, resulting in a worse fatality rate.

As described above, the vapor of the solvent is lowered and the weight ratio of the liquid to the propellant is set to be within the range of 8:92 to 30:70. You can get an extermination effect. The above efficacy test was conducted only for black cockroaches, but as is clear from Examples 1 to 10, since the insecticidal active ingredient is attached not only to the black cockroaches in front of the gap but also to the black cockroaches in the back, It is also possible to obtain a sufficient extermination effect against crawling insect pests such as American cockroach, German cockroach, and centipede.

The above-described embodiments are merely examples in all respects and should not be construed in a restrictive manner. Furthermore, all modifications and changes within the equivalent scope of claims are within the scope of the present invention.

As described above, the aerosol product for exterminating creeping pests and the method for exterminating creeping pests according to the present invention can be used, for example, for exterminating creeping pests such as cockroaches indoors.

1 aerosol product for exterminating creeping pests 10 aerosol container 20 operation button (injection button)

Claims (1)

an insecticidal active ingredient that exterminates creeping pests;
a solvent in which the insecticidal active ingredient dissolves;
a propellant for injecting the insecticidal active ingredient and the solvent;
An aerosol product for exterminating creeping pests, comprising an aerosol container containing the insecticidal active ingredient, the solvent, and the propellant,
The weight ratio of the propellant contained in the aerosol container and the liquid other than the propellant is set to be within the range of 8:92 to 30:70 when the liquid:propellant is used. ,
The aerosol container is a constant injection type that injects a predetermined amount of the insecticidal active ingredient and the solvent with one operation of the injection button,
The injection button is a push-down operation button that fits into a discharge pipe of the aerosol container,
An aerosol product for exterminating creeping pests, wherein the operation button has a nozzle portion communicating with the discharge pipe.

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