JP6830652B2 - Insecticidal aerosol products - Google Patents

Description

The present invention relates to an insecticidal aerosol product that kills pests such as bees and bugs.

Conventionally, insecticides containing oily liquids have been studied. Patent Document 1 discloses a pest control agent containing a mineral oil that acts as a spreading agent. Patent Document 2 discloses a pesticide composition containing a low-viscosity mineral oil. Patent Document 3 discloses that liquid paraffin is added as a foaming regulator in a resin foaming aerosol. Patent Document 4 discloses that liquid paraffin is used as a solvent for transfluthrin to prevent the precipitation of crystals in a high-concentration solution of transfluthrin. Patent Document 5 discloses that a pyrethroid compound contains paraffin in a room temperature liquid in order to prevent deterioration by light and ultraviolet rays.

Japanese Patent No. 4053131 Japanese Unexamined Patent Publication No. 2011-517685 Japanese Patent No. 4741780 Japanese Unexamined Patent Publication No. 2001-192309 Japanese Patent No. 5556790

By the way, as described above, the oily liquid is contained in the insecticide composition for various purposes, but the priority of the efficacy of the insecticide composition for the user is to make the insecticide composition a pest. This is the so-called knockdown time, which is the time from when the pest is attached until the normal movement of the pest stops. In particular, it is important for pests that move quickly and sting humans, such as bees and bugs.

The present invention has been made in view of this point, and an object of the present invention is to shorten the knockdown time of pests.

In order to achieve the above object, in the present invention, liquid paraffin having a specific range of kinematic viscosity is blended.

The first invention is an insecticidal aerosol product in which an aerosol composition containing an insecticidal component and liquid paraffin is contained in an aerosol container together with a propellant, and the kinematic viscosity of the liquid paraffin is 18.0 mm ² / s (40 ° C.). ) It is characterized by the above.

According to this configuration, since the liquid paraffin having a kinematic viscosity of 18.0 mm ² / s (40 ° C.) or more is contained, the knockdown time is shortened as compared with the aerosol composition not containing the liquid paraffin.

The knockdown time is the time from the start of spraying the aerosol composition to the pest until the pest is knocked down. Knockdown refers to a state in which the normal movement of the pest has stopped, and specifically, it means that the pest that has abnormal flight or walking becomes astonished (turned over).

The second invention is characterized in that, in the first invention, the content of the liquid paraffin is 10 w / v% or less of the aerosol composition.

That is, when the insecticide aerosol product is used indoors, for example, the insecticide composition may adhere to the wall or the like. If the insecticide composition containing an oily liquid adheres to a wall or the like as in Patent Documents 1 to 5, it takes time to evaporate, and there is a risk that the insecticide composition will continue to be contaminated for a long time. However, according to the present invention, since the content of liquid paraffin, which is an oily liquid, is 10 w / v% or less, the passage of time when the aerosol composition adheres to a wall or the like when the aerosol product is used indoors. As a result, it tends to disappear, and the aerosol composition does not easily remain on the wall or the like.

Further, since the content of liquid paraffin is 10 w / v% or less, the aerosol composition is less likely to be clogged inside the injection nozzle.

The third invention is characterized in that, in the first or second invention, the insecticidal component is phthalthrin.

According to this configuration, the combination of phthalthrin and liquid paraffin further shortens the knockdown time .

According to the first invention, the knockdown time can be shortened by increasing the kinematic viscosity of the liquid paraffin to 18.0 mm ² / s (40 ° C.) or more.

According to the second invention, since it contains 10 w / v% or less of liquid paraffin, it is possible to reduce the contaminating property after use while shortening the knockdown time of pests.

According to the third invention, the knockdown time can be further shortened by using phthalthrin and liquid paraffin .

It is a graph which shows the efficacy ratio of a comparative example and an Example.

Hereinafter, embodiments of the present invention will be described in detail. It should be noted that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its application or its use.

The insecticidal aerosol product according to the embodiment of the present invention comprises an aerosol composition and a propellant for injecting the aerosol composition contained in an aerosol container. Since the aerosol container has been well known in the past, detailed description thereof will be omitted, but a valve having an injection port for injecting the contents is provided, and the contents can be released by pushing the valve. It is designed to be injected at a predetermined flow rate. The spray particle size, the effective reach of the spray, and the like can be set by the type of propellant, the valve structure, the diameter of the jet port, and the like.

As the propellant, for example, liquefied petroleum gas (LPG), dimethyl ether (DME) and the like can be used, and among these, only one type or a mixture of two or more types can be used.

The aerosol composition contains an insecticidal component, an HFO-based solvent, liquid paraffin, and a solvent, but the HFO-based solvent may be omitted. As the insecticidal component, for example, a pyrethroid insecticidal component can be used, and examples thereof include tralomethrin, bifenthrin, permethrin, phenothrin, cypermethrin, cyphenothrin, phthalthrin, resmethrin, etofenprox, aclinatrin, and silafluofen. Of these, any one type may be used, or two or more types may be mixed and used. Suitable insecticidal ingredients are phthalthrin and tralomethrin. As the phthalthrin, d-T80 phthalthrin, d-T98 phthalthrin and the like are known depending on the content ratio of the stereoisomer, but any of them can be used. Phthalthrin is an insecticidal ingredient having an excellent immediate knockdown effect on pests, and in this sense, it can be called a "knockdown agent". Tralomethrin is an insecticidal component that has an excellent final lethal effect on pests rather than an immediate effect, and can be called a "lethal agent" in this sense. By including both the knockdown agent and the lethal agent, an immediate knockdown effect and a certain lethal effect can be obtained. Since the present invention relates to shortening the knockdown time, the effect of the present invention can be more preferably exhibited by using an insecticidal component (knockdown agent) having an excellent immediate knockdown effect. ..

As the HFO-based solvent, for example, Bertrel Suprion, Bertrel Cinella, etc. manufactured by Mitsui-DuPont Fluorochemical Co., Ltd. can be used.

As the liquid paraffin, for example, liquid paraffin having a kinematic viscosity of 18.0 mm ² / s (40 ° C.) or more is preferable. Liquid paraffin with kinematic viscosity of 18.0 mm ² / s (40 ° C) or more is manufactured by Sanko Chemical Industry Co., Ltd. under the product names 100-S, 120-S, 150-S, 260-S, 350-S, 380-S. Etc., and any one of these may be used, or two or more thereof may be mixed and used. The kinematic viscosity of each liquid paraffin, product name 100-S is 18.0 mm ² / s ± 2 (40 ° C.), a 120-S is 20.5 mm ² / s ± 2 (40 ℃), 150 -S is 25.4 mm ² / s plus or minus 2 (40 ° C), 260-S is 49.0 mm ² / s plus or minus 3 (40 ° C), 350-S is 67.0 mm ² / s plus. It is minus 3 (40 ° C.), and 380-S is 73.0 mm ² / s plus or minus 3 (40 ° C.).

As will be described later, liquid paraffin having a kinematic viscosity of 4.4 mm ² / s (product name 40-S), liquid paraffin having a kinematic viscosity of 8.0 mm ² / s (product name 55-S), and kinematic viscosity 13.8 mm ² / s. When the liquid paraffins (product name 80-S) of No. 1 were used alone, the knockdown time was not significantly shortened as compared with the case where the liquid paraffin was not added.

Further, the liquid paraffin having a kinematic viscosity of 18.0 mm ² / s (40 ° C.) or more may be obtained by mixing any two or more of the above-mentioned liquid paraffins having a plurality of product numbers.

The solvent is not particularly limited as long as it can dissolve an insecticidal component or the like, and for example, one or more solvents from hydrocarbons, alcohols, isoparaffins and the like can be contained depending on the purpose. For example, kerosene (kerosene) or the like may be contained as a solvent for improving the affinity for the surface of the insect body. Further, the aerosol composition may further contain, for example, a solvent (auxiliary solvent) for improving the solubility of the poorly soluble insecticidal component. Examples of such an auxiliary solvent include glycol ether-based solvents, and examples of the glycol ether-based solvent include PGME (propylene glycol monomethyl ether).

Target pests of aerosol products include bees, bugs, etc., but can also be used for pests other than these.

Next, the results of the efficacy test and the results of the contamination test will be described for the aerosol product according to the embodiment.

First, the results of the efficacy test will be described. The test agents are Comparative Examples 1 to 4 shown in Table 1 and Examples 1 to 4 shown in Table 2.

Tralomethrin and d-T80 phthalthrin are insecticidal components. Neothiozole F (kerosene) is a solvent that dissolves insecticidal components. LPG0.4 (0.4MPaG (at 20 ° C)) is a propellant. In the examples and comparative examples of the present specification, the aerosol composition was prepared to have a volume of 165 ml, and the aerosol composition and the propellant were filled in an aerosol container to obtain 550 ml of an insecticidal aerosol product.

Comparative Example 1 is an example in which liquid paraffin is not contained. Comparative Example 2 contains 10 w / v% of the aerosol composition containing liquid paraffin having the product name 40-S. Comparative Example 3 contains 10 w / v% of liquid paraffin having the product name 55-S. Comparative Example 3 contains 10 w / v% of liquid paraffin having the product name 80-S.

Example 1 contains 10 w / v% of liquid paraffin having a product name of 100-S. Example 2 contains 10 w / v% of liquid paraffin having the product name 120-S. Example 3 contains 10 w / v% of liquid paraffin having the product name 260-S. Example 4 contains 10 w / v% of liquid paraffin having the product name 380-S.

The test method is as follows. The test insect is an adult female honeybee. The knockdown time was measured by repeating 1 test insect × 3 times for each of Comparative Examples 1 to 4 and Examples 1 to 4. The test insects were placed one by one in a glass ring having a diameter of 9 cm, and lids were placed on both ends of the glass ring using a nylon mesh and a metal ring. This glass ring was installed inside a glass tube connected to an aerosol injection device. The distance between the spray port of the aerosol injection device and the test insect was 5 m, and the injection time was continuously set to 2 seconds. The time from the start of injection of the aerosol injection device to the knockdown of the test insect (knockdown time) was measured, and the average value after repeating three times was calculated.

The test results are shown in FIG. FIG. 1 shows the ratio (effectiveness ratio) when the knockdown time (average 24.06 seconds) of Comparative Example 1 is 1. In Comparative Examples 2 to 4, the potency ratio was about 1.06 to 0.95, and the potency was not much different from that of Comparative Example 1 containing no liquid paraffin.

On the other hand, in Examples 1 and 2, the efficacy ratio was about 0.82, in Example 3, the efficacy ratio was about 0.70, and in Example 4, the efficacy ratio was about 0.75. .. Therefore, it can be seen that the knockdown time can be shortened by setting the kinematic viscosity of the liquid paraffin contained in the aerosol composition to 18.0 mm ² / s (40 ° C.) or more. In addition to Western honey bee, it is estimated that the test results show the same tendency for pests such as wasps and honeybees.

Further, in Example 2, the efficacy ratio was about 0.8 in both cases where the liquid paraffin of product name 120-S was set to 5 w / v% and the liquid paraffin of product name 120-S was set to 50 w / v%. It was. Further, in Example 3, the efficacy ratio was about 0.7 in both cases where the liquid paraffin of product name 260-S was set to 5 w / v% and the liquid paraffin of product name 260-S was set to 50 w / v%. It was.

Next, the efficacy when the HFO-based solvent is contained will be described. The test agents are Examples 5 and 6 shown in Table 3.

Example 5 differs from that of Example 3 in that the insecticidal component is d-T98 phthalthrin. In Example 6, Bartrel cinera is contained as an HFO-based solvent. As a result of conducting the same test as the above-mentioned test, the knockdown time of Example 5 was 15.57 seconds, and the knockdown time of Example 6 was 11.97 seconds. Therefore, the knockdown time can be further shortened by containing the HFO-based solvent.

By the way, conventionally, a technique has been known in which a certain oily liquid is sprayed on an insect body to cause the insect to die. It is believed that the oily liquid attached to the insect body blocks the airway, and the insect chokes on the insect, resulting in death. However, in this case, since it is necessary to spray a large amount of oily liquid on the insects, there is a problem that the surroundings are polluted (contaminated) by the oily liquid. Moreover, it took several minutes or more for the insects to suffocate, so there was almost no immediate knockdown effect.

In fact, the inventors of the present application have also conducted a test in which liquid paraffin is sprayed on the insect body by itself, but even when a large amount of liquid paraffin is sprayed, it takes several minutes to knock down. This is extremely slow compared to the knockdown time due to the insecticidal component (in the case of Comparative Examples 1 and 2). Therefore, even if liquid paraffin was added to the insecticidal aerosol product, it was not considered to have the effect of shortening the knockdown time without contaminating the surroundings.

On the other hand, for example, as in Patent Document 1, a technique of using a certain oily liquid as a spreading agent is known in the field of pesticides. This is related to pesticides that take several days to develop their effects, and although it is possible that the use of spreading agents will improve their sustainability, it is unlikely that their immediate effects will improve. It was also considered that the oily liquid may block the insect's airway and inhibit the absorption of the knockdown agent.

As described above, from the conventional knowledge, it cannot be predicted that the addition of liquid paraffin has the effect of shortening the knockdown time. However, as described above, the inventors of the present application have found that the effect of shortening the knockdown time can be unexpectedly obtained by blending liquid paraffin with the insecticidal aerosol product, and have completed the present invention. In particular, it was a surprising effect that the knockdown time could be remarkably shortened by setting the kinematic viscosity of the liquid paraffin to 18.0 mm ² / s (40 ° C.) or more, which could not be predicted from the conventional knowledge.

Next, the results of the contamination test will be described. The test agent used in the contamination test was based on the formulation of Example 1 and was prepared so that the liquid paraffin was 10 w / v%, and the liquid paraffin was 50 w / v based on the formulation of Example 1. This is an example prepared so as to be%. The test method is a method of spraying each test agent for 3 seconds from a distance of 1 m with respect to the concrete plate. Then, the state after 1 day and 7 days after the injection was confirmed.

In the case of an example containing 50 w / v% of liquid paraffin, the trace of the aerosol composition adhering can be clearly confirmed after 1 day, and the trace of the aerosol composition adhering even after 7 days has passed. It was possible. On the other hand, when liquid paraffin is contained in an amount of 10 w / v%, the trace of the aerosol composition adhered remains thin and almost inconspicuous after 1 day, and the aerosol composition adheres after 7 days. I don't know what I did.

As described above, according to the aerosol product according to this embodiment, the knockdown time of pests can be significantly shortened. Further, when the content of liquid paraffin, which is an oily liquid, is 10 w / v% or less, the aerosol composition tends to disappear with the passage of time when the aerosol composition adheres to a wall or the like using an aerosol product, and the aerosol The composition is less likely to remain on the wall or the like, and the contaminantability can be reduced.

The above embodiments are merely exemplary in all respects and should not be construed in a limited way. Furthermore, all modifications and modifications that fall within the equivalent scope of the claims are within the scope of the present invention.

As described above, the aerosol product according to the present invention can be used for, for example, bees and abs.

Claims (3)

Insecticidal ingredients and
In an insecticidal aerosol product in which an aerosol composition containing liquid paraffin is contained in an aerosol container together with a propellant.
An insecticidal aerosol product characterized in that the kinematic viscosity of the liquid paraffin is 18.0 mm ² / s (40 ° C.) or higher. In the insecticidal aerosol product according to claim 1.
An insecticidal aerosol product characterized in that the content of the liquid paraffin is 10 w / v% or less of the aerosol composition. In the insecticidal aerosol product according to claim 1 or 2.
The insecticidal aerosol product characterized in that the insecticidal component is phthalthrin.

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