JP2023142047A - Pest repellent composition for human bodies and pest repellent product for human bodies - Google Patents

Abstract

To provide a pest repellent composition for human bodies and a pest repellent product for human bodies which cause neither scattering nor dripping, and which offer good use feeling and become foamy easily uniformly applicable to skin.SOLUTION: A pest repellent composition for human bodies includes a repellent active ingredient (a), a silicone-based surfactant (b), ethanol (c), and water (d), and becomes foamy in use. It is possible to configure a repellent product for human bodies 1 by putting the pest repellent composition for human bodies in a container 2.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a pest repellent composition for the human body, and more specifically, a pest repellent composition for the human body that does not drip or scatter when used, has a good feeling of use, and is foam-like and easy to apply uniformly to the skin. The present invention relates to a repellent composition.

Many conventional repellents for insects such as mosquitoes that are used on the skin contain ethanol and are used in liquid form. Products that are used in liquid form often drip when used, making it difficult to apply them evenly to the skin. There are also safety issues such as scattering during use and irritation of mucous membranes due to the user and those around them inhaling the particles ejected by the scattering, but repellents containing ethanol cannot control their properties. It is difficult to achieve properties in a liquid state without dripping or scattering, and technological development is being carried out with the aim of improving the scattering and the like. For example, Patent Document 1 proposes a method using a volatile-suppressing component, and Patent Document 2 proposes a method of incorporating a thickener. Regarding other pest repellents used on the skin, various technological developments are being carried out with the aim of improving the feeling of use and reducing irritation.

International Publication No. 2017/171030 Japanese Patent Application Publication No. 2018-035150

As mentioned above, many conventional repellents are in liquid form containing ethanol, which has the problem of staining clothing and surrounding items due to liquid dripping when used, and that it is difficult to apply evenly to the skin. . In addition, the user or those around them may feel irritation if they inhale the repellent active ingredients scattered during use. Since it is difficult to control the properties of repellents containing ethanol, it has been difficult to solve these problems while maintaining the liquid state.

The present disclosure has been made in order to solve the conventional problems as described above. The present invention aims to provide a pest repellent composition for use on the human body and a product containing the pest repellent composition for use on the human body.

In order to achieve the above object, a human pest repellent composition according to one embodiment of the present disclosure includes a repellent active ingredient (a), a silicone surfactant (b), ethanol (c), and water ( d) and can be used as a foam.

The repellent active ingredient (a) can be at least one selected from the group consisting of icaridin and DEET.

The silicone surfactant (b) may be a polyether-modified silicone surfactant.

The HLB value of the silicone surfactant (b) may be 7 or more and 15 or less, and the concentration range of the silicone surfactant (b) may be 0.001% by mass or more and 5% by mass or less. good.

The concentration of ethanol (c) can be 25% by mass or more and 79% by mass or less based on the total mass of the human pest repellent composition.

The concentration range of the repellent active ingredient (a) may be 5% by mass or more and 50% by mass or less.

A pest repellent product for the human body may also be provided, which includes a foam discharge container for discharging the pest repellent composition for the human body in the form of foam.

According to the present disclosure, it is possible to provide a foam repellent composition for the human body and an insect repellent product for the human body that does not scatter or drip, has a good feeling of use, and is easy to apply uniformly to the skin.

FIG. 2 is a side view of a pest repellent product for human body.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Note that the following description of preferred embodiments is essentially just an example, and is not intended to limit the present invention, its applications, or its uses.

FIG. 1 shows a human pest repellent product 1 according to an embodiment of the present invention. The human body pest repellent product 1 includes a foam discharge container 2 and a human body pest repellent composition contained in the foam discharge container 2. The foam discharge container 2 is a container configured to be able to foam and discharge the pest repellent composition for human body contained therein. There have been various kinds of foam discharging containers 2 of this kind, and any type can be used as the present foam discharging container 2. The content capacity of the foam discharge container 2 can be set arbitrarily.

An example of the foam discharge container 2 is shown in FIG. 1, and the foam discharge container 2 includes a container body 20 made of a hollow member made of, for example, a resin material, and a manual pump 21 attached to the upper part of the container body 20. It is equipped with The manual pump 21 has a built-in pump mechanism 21a, and an inlet (not shown) of the pump mechanism 21a is connected to an inlet pipe 21b for inhaling the pest repellent composition for human body. The suction pipe 21b extends to the vicinity of the bottom wall of the container body 20. An operating section 21c for operating the pump mechanism 21a is provided at the top of the manual pump 21. The operating portion 21c is vertically movable and is constantly urged upward by a biasing member (not shown) or the like. When the user presses down the operating part 21c, the pump mechanism 21a operates to suck up the liquid pest repellent composition for human body from the suction pipe 21b, and mixes air to turn the pest repellent composition for human body into a foam. and discharges from the discharge port 21d. The mechanism of mixing air into a liquid pest repellent composition for the human body to form a foam is well known, and detailed explanation thereof will be omitted.

Further, although not shown, the foam discharge container may be an aerosol container. In this case, gas is stored in the container body, and by pressing the operation button, the gas is mixed with the pest repellent composition for human body to form a foam, and the foam is discharged from the discharge port. It can also be configured to do so.

The pest repellent composition for human body has the property of becoming foamy when used, for example, by using the foam discharge container 2. The property of being liquid during transportation, storage, and on store shelves, and becoming foamy immediately upon use can also be referred to as foaming property. That is, the human body pest repellent composition according to the present embodiment is a foamy human body pest repellent composition or a human body pest repellent composition used in foam form.

<Composition of pest repellent composition for human body>
The pest repellent composition for humans contains an effective repellent ingredient (a), a silicone surfactant (b), ethanol (c), and water (d). The human pest repellent composition may contain other components than the repellent active ingredient (a), silicone surfactant (b), ethanol (c) and water (d). The details of each component will be described below, but the examples shown below are just examples.

<Repellent active ingredient (a)>
The repellent active ingredient (a) is a component that has a repellent effect on pests. Examples of pests include mosquitoes, gnats, stable flies, house dust mites, bed bugs, ticks, chiggers, fire ants, and the like, and any ingredient that has a repellent effect against these pests can be used as the repellent active ingredient (a).

Such repellent active ingredients (a) are not particularly limited, and include, for example, icaridin, DEET (diethyltoluamide), 3-(Nn-butyl-N-acetyl)aminopropionic acid ethyl ester (IR3535), p -Menthane-3,8-diol, 2-ethyl-1,3-hexadiol, butyl 3,4-dihydro-2,2-dimethyl-4-oxo-2H-pyran-6-carboxylate, n-hexyltri Ethylene glycol monoether, methyl 6-n-pentyl-cyclohexene-1-carboxylate, dimethyl phthalate, eucalyptol, α-pinene, geraniol, citronellal, camphor, linalool, terpenol, carvone, dioctyl phthalate, dibutyl phthalate, Pest repellent ingredients such as naphthalene, cinnamon, camphor, lemongrass, clover, thyme, geranium, bergamont, laurel, pine, red peach, benny royale, eucalyptus, Indian sedan; natural pyrethrin, pyrethrin, allethrin, phthalthrin, resmethrin, flamethrin , phenothrin, permethrin, cyphenothrin, pralethrin, etofenprox, empenthrin, transfluthrin, and other pyrethroid insecticidal compounds. Any one of these may be used alone, or two or more may be used in combination.

The repellent active ingredient (a) is preferably a repellent active ingredient that is sparingly soluble in water and soluble in ethanol. Examples of such repellent active ingredients include icaridin, DEET (diethyltoluamide), 3-(N -n-butyl-N-acetyl)aminopropionic acid ethyl ester (IR3535), p-menthane-3,8-diol, and the like. Among these, icaridin or DEET is preferred in terms of the feeling of use and effectiveness when applied to the skin.

<Silicone surfactant (b)>
The silicone surfactant (b) is, for example, a polyether-modified silicone surfactant. The polyether-modified silicone surfactant (b) is a component that contributes to improving foaming properties. The HLB value of the silicone surfactant (b) is in the range of 7 or more and 15 or less.

<Water (d)>
Water (d) is not particularly limited, and usable water (d) includes, for example, purified water, ion-exchanged water, hot spring water, deep ocean water, distilled vegetable water, fermented liquid, bark liquid, and the like.

<Other ingredients>
Examples of other components include surfactants other than silicone surfactants. Other additives include humectants, sterilizers/preservatives, thickeners other than water-soluble polymers, pigments, pH adjusters, fragrances, ultraviolet absorbers, ultraviolet scattering agents, antioxidants, and the like. Among these, any one type or a combination of two or more types may be mixed into the pest repellent composition for human body.

Other surfactants are not particularly limited, and any known surfactant can be used as appropriate. Specific examples include polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol tetraoleate, polyoxyethylene hydrogenated castor oil, polyoxyethylene polyoxypropylene glycol, etc. These surfactants are used in repellent compositions. It is preferable because it does not easily impair stability.

<Concentration of each component>
In the pest repellent composition for human body according to the present embodiment, the concentration of the repellent active ingredient (a) is set in the range of 5% by mass or more and 50% by mass or less based on the total mass of the pest repellent composition for human body. be able to. Moreover, the concentration of the repellent active ingredient (a) can also be set in the range of 5% by mass or more and 30% by mass or less based on the total mass of the human pest repellent composition. If the concentration of the repellent active ingredient (a) is at least the above lower limit, the repellent effect against pests is likely to be exhibited when the human pest repellent composition is used on the skin, and if it is below the above upper limit, the pest repellent composition for the human body is effective. The pest repellent composition has better foaming properties.

The concentration of the silicone surfactant (b) can be set in a range of 0.001% by mass or more and 5% by mass or less based on the total mass of the human pest repellent composition. If the concentration of the silicone surfactant (b) is less than the above lower limit, the foaming properties of the pest repellent composition for human body may decrease; There is a risk that the usability of the product may deteriorate.

The concentration of ethanol (c) can be set in a range of 25% by mass or more and 79% by mass or less based on the total mass of the repellent composition. If the concentration of ethanol (c) is within the above range, the foam repellent composition will have excellent stability.

<Method for preparing repellent composition>
The method for preparing the pest repellent composition for humans is not particularly limited, and any known method can be used. For example, a pest repellent composition for humans can be prepared by the following method.

Stir the repellent active ingredient (a), a surfactant (silicone surfactant (b), other surfactants as necessary), ethanol (c), and water (d) at room temperature. Additives (other ingredients) are added to the mixture as needed, and after uniformly dispersing, additives such as preservatives and fragrances are added and further stirred.

<Effect>
When the human body pest repellent composition is stored in the foam discharge container 2 and the user presses down the operating part 21c, the human body pest repellent composition in the form of foam is discharged from the discharge port 21d. Since the pest repellent composition for the human body is discharged in the form of a foam, there is no dripping or scattering during use, and it has a good feeling of use and is easy to apply uniformly to the skin.

In addition, as a surfactant, silicone surfactant (b) with an HLB value in a specific range (7 or more and 15 or less) is used, so even if it contains a large amount of ethanol (c), it has excellent foaming properties. A pest repellent composition for use can be provided.

When a pest repellent composition for the human body is applied to the skin, for example, it exhibits a repellent effect against pests.

Furthermore, by applying the human pest repellent composition to the human skin, it repels, for example, mosquitoes, black flies, sand flies, dust mites, bed bugs, ticks, chiggers, fire ants, etc., thereby reducing damage caused by these pests. It can be suppressed.

EXAMPLES The present invention will be explained in more detail with reference to Examples and Comparative Examples below, but the present invention is not limited to these Examples.

<Production method of Examples and Comparative Examples>
Table 1 shows the types and HLB values of silicone surfactants.

Repellent active ingredients (a) of the types and amounts listed in Tables 2 to 4 below (numbers indicate mass%), surfactants (silicone surfactants (b), and other ingredients as necessary) Surfactant), ethanol (c), and water (d) are stirred at room temperature, and additives are added as necessary to this mixture and after uniformly dispersing, additives such as preservatives and fragrances are added. Add and stir further.

The "balance" of water in Tables 3 to 5 indicates the amount that makes the total amount of the pest repellent composition for human body 100% by mass.

<Foaming property evaluation>
Foaming property evaluation will be explained. Using a foam dispensing container (manufactured by Yoshino Kogyo), 5 ml (for 5 pumps) was discharged into a measuring cylinder, the volume of foam produced at that time was measured, and foaming properties were evaluated based on the measurement results. Based on Table 2, foaming properties were scored. A foam volume of 10 ml or less was given a score of 0 and was considered to have no foaming property.

Table 2 shows the foaming property evaluation method. In Table 3, "immediately" indicates the foaming property evaluation results immediately after the preparation of each example and comparative example, and "1 month after 50°C" indicates the foaming property evaluation results after being stored in a 50°C environment for 1 month after production. It is.

As shown in Table 3, the human pest repellent compositions of Examples 1 to 7 are capable of uniformly dispersing the repellent active ingredient when the HLB value of the silicone surfactant (b) is in the range of 7 to 15. The results of the foaming test were also good. However, in Comparative Examples 1 and 2 where the HLB value was less than 7, Comparative Example 4 where the HLB value was greater than 15, and Comparative Example 3 where silicone oil, which is a silicone type but is not a surfactant, was blended, foaming properties decreased. .

As shown in Table 4, in Examples 8 to 10 in which the concentration range of icaridin, which is the repellent active ingredient (a), is 5% by mass or more and 30% by mass, the repellent active ingredient is uniformly dispersed, and the foaming test results was also good. Although Example 11 contained 79% by mass of ethanol, the results of the foaming test were good. The repellent compositions of Examples 12 to 15 contain DEET as an active repellent ingredient, and like icaridin, DEET is uniformly dispersed in a concentration range of 5% by mass to 50% by mass, and the foamability test The results were also good. However, in Comparative Example 5, in which the blending amount of ethanol was 80% by mass or more, the foaming property decreased.

As shown in Table 5, the repellent compositions of Examples 16 to 20 contain the silicone surfactant (b) in an amount of 0.001% by mass to 5% by mass, and Although the repellent composition contained 25% by mass of ethanol, the foaming test results were good.

On the other hand, in the human pest repellent compositions of Comparative Examples 7 and 8, a nonionic surfactant was added as a surfactant, but the foaming properties were reduced in all of them.

Furthermore, the human pest repellent composition of Comparative Example 6 has a silicone surfactant (b) content of 0.0001% by mass, and the human pest repellent composition of Comparative Example 9 has an ethanol content of 20% by mass. Although it is mass %, foaming property decreased.

As shown in Table 6, the human pest repellent composition of Example 5 was confirmed to have foaming properties when discharged from a foam dispensing container, but no foaming properties were confirmed from the pump mist container.

<Flash evaluation>
The human pest repellent composition was uniformly applied to the inner forearms of five test subjects, and the scattering was evaluated based on the test subjects' evaluation results based on the following criteria. The results are shown in Table 7.

(Evaluation criteria)
○: All 5 people did not feel dispersion.

×: One or more people felt scattered.

<Drip evaluation>
The pest repellent composition for humans was applied to the inside of the forearm of five test subjects, and the difficulty of dripping was evaluated based on the evaluation results of the test subjects using the following criteria. The results are shown in Table 7.

(Evaluation criteria)
○: All five people did not feel any dripping.

×: One or more people felt dripping.

<Evaluation of ease of uniform application>
The pest repellent composition for humans was applied to the inner forearms of five test subjects, and the ease of uniform application was evaluated based on the evaluation results of the test subjects using the following criteria. The results are shown in Table 7.

(Evaluation criteria)
○: All five people felt that it was easy to apply evenly.

×: One or more people felt that it was difficult to apply uniformly.

<Evaluation of mucosal irritation during spraying>
The human pest repellent composition was uniformly applied to the inner forearms of five subjects, and the irritation was evaluated based on the test subjects' evaluation results according to the following criteria. The results are shown in Table 7.

(Evaluation criteria)
○: All five people did not feel any stimulation.

×: One or more people felt irritation.

As shown in Table 7, when compared with commercial product A (mist) and commercial product B (aerosol), the human pest repellent composition of Example 5 has no scattering of the repellent active ingredient, and when used. There was little irritation and no dripping.

<Blood-sucking prevention effect>
A pest repellent composition for humans was applied uniformly to the inside of the forearms of three subjects, and a syringe containing 10 female Aedes albopictus mosquitoes was pressed against the skin for 1 minute after each time elapsed, and the number of blood sucked was counted to determine the repellent effect. Measured and evaluated. The results are shown in Tables 8 and 9.

As shown in Table 9, it was confirmed that the human pest repellent composition of the example had the same or higher blood-sucking inhibiting effect when compared with commercially available product A (Mist).

The embodiments described above are merely illustrative in all respects and should not be interpreted in a limiting manner. Furthermore, all modifications and changes that come within the scope of equivalents of the claims are intended to be within the scope of the present invention.

As explained above, the pest repellent composition for the human body according to the present invention is used to repel pests such as mosquitoes, gnats, stable flies, house dust mites, bed bugs, ticks, chiggers, and fire ants. For example, it can be used as an insect repellent applied to human skin, or as an insect repellent applied to the epidermis of pets and livestock.

1 Pest repellent product for human body 2 Foam discharge container 20 Container main body 21 Manual pump 21a Pump mechanism 21b Suction pipe 21c Operation part 21d Discharge port

Claims (8)

A pest repellent composition for the human body that is foam-like and contains a repellent active ingredient (a), a silicone surfactant (b), ethanol (c), and water (d). 2. The human pest repellent composition according to claim 1, wherein the repellent active ingredient (a) is at least one selected from the group consisting of icaridin and DEET. The human pest repellent composition according to claim 1 or 2, wherein the silicone surfactant (b) is a polyether-modified silicone surfactant. The HLB value of the silicone surfactant (b) is 7 or more and 15 or less, and the concentration range of the silicone surfactant (b) is 0.001 mass% or more and 5 mass% or less. The pest repellent composition for human body according to any one of the above. The human pest repellent according to any one of claims 1 to 4, wherein the concentration of the ethanol (c) is 25% by mass or more and 79% by mass or less based on the total mass of the human pest repellent composition. agent composition. The human pest repellent composition according to any one of claims 1 to 4, wherein the concentration range of the repellent active ingredient (a) is 5% by mass or more and 50% by mass or less. The human pest repellent composition according to claim 6, wherein the concentration range of the repellent active ingredient (a) is 30% by mass or less. The pest repellent composition for human body according to any one of claims 1 to 7,
A pest repellent product for the human body, comprising a foam discharge container containing the pest repellent composition for the human body and for discharging the pest repellent composition for the human body in the form of foam.