Pest repellent composition for human use and pest repellent product for human use

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

[Technical Field]

[0001] The present disclosure relates to a pest repellent composition for human use, and more particularly to a pest repellent composition for human use that does not drip or scatter during use, has a good feel when used, and is in the form of a foam that can be easily applied evenly to the skin. [Background technology]

[0002] Many conventional skin repellents for mosquitoes and other pests contain ethanol and are used in liquid form. Liquid-form products often drip during use, making them difficult to apply evenly to the skin. Safety issues include scattering during use and the risk of mucosal irritation caused by inhalation of particles sprayed by scattering by the user and those around them. However, controlling the properties of ethanol-containing repellents makes it difficult to achieve a liquid state that does not drip or scatter. Therefore, technological developments aimed at improving scattering and other issues are being conducted. For example, Patent Document 1 proposes a method using a volatilization-suppressing component, and Patent Document 2 proposes a method incorporating a thickener. Various technological developments are also being conducted for pest repellents used on the skin, aiming to improve usability and reduce irritation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2017 / 171030 [Patent Document 2] Japanese Patent Application Laid-Open No. 2018-035150 Summary of the Invention [Problem to be solved by the invention]

[0004] As mentioned above, many conventional repellents are liquids containing ethanol, which can cause problems such as dripping and staining clothes and surrounding items during use, and difficulty in applying the repellent evenly to the skin. Furthermore, the user and those around them may experience irritation when inhaling the repellent active ingredients that are dispersed during use. Because it is difficult to control the properties of ethanol-containing repellents, it has been difficult to solve these problems while maintaining a liquid state.

[0005] The present disclosure has been made to solve the above-mentioned conventional problems, and aims to provide a pest repellent composition for human use that does not scatter or drip, has a good feel when used, and is in the form of a foam that can be easily applied evenly to the skin, and a product containing the pest repellent composition for human use. [Means for solving the problem]

[0006] In order to achieve the above object, one embodiment of the present disclosure provides a pest repellent composition for human use that contains a repellent active ingredient (a), a silicone surfactant (b), ethanol (c), and water (d), and can be used in foam form.

[0007] The repellent active ingredient (a) can be at least one selected from the group consisting of icaridin and DEET.

[0008] The silicone surfactant (b) may be a polyether-modified silicone surfactant.

[0009] The HLB value of the silicone surfactant (b) may be 7 or more and 15 or less, and the concentration of the silicone surfactant (b) may be in the range of 0.001% by mass or more and 5% by mass or less.

[0010] 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 pest repellent composition for human use.

[0011] The concentration of the active repellent ingredient (a) may be in the range of 5% by mass or more and 50% by mass or less.

[0012] The pest repellent product for human use may also be provided with a foam-discharging container for discharging the pest repellent composition for human use in foam form. [Effects of the Invention]

[0013] According to the present disclosure, it is possible to provide a foam-like repellent composition for human use and a pest repellent product for human use that do not scatter or drip, have a good feel when used, and are easy to apply evenly to the skin. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a side view of a human pest repellent product. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the present invention, its applications, or its uses.

[0016] FIG. 1 shows a pest repellent product for human use 1 according to an embodiment of the present invention. The pest repellent product for human use 1 comprises a foam-dispensing container 2 and a pest repellent composition for human use contained in the foam-dispensing container 2. The foam-dispensing container 2 is a container configured so that the pest repellent composition for human use contained therein can be discharged in the form of foam. There are various types of foam-dispensing containers 2 available in the past, and any type can be used as the foam-dispensing container 2 of the present invention. The internal volume of the foam-dispensing container 2 can be set as desired.

[0017] An example of a foam-dispensing container 2 is shown in FIG. 1. The foam-dispensing container 2 includes a container body 20 made of a hollow member, such as a resin material, and a manual pump 21 attached to the top of the container body 20. The manual pump 21 incorporates a pump mechanism 21a, and an inlet (not shown) of the pump mechanism 21a is connected to an inlet pipe 21b that draws in the pest repellent composition for human use. The inlet pipe 21b extends to the vicinity of the bottom wall of the container body 20. An operating part 21c for operating the pump mechanism 21a is provided at the top of the manual pump 21. The operating part 21c is vertically movable and is constantly biased upward by a biasing member (not shown). When a user presses down on the operating part 21c, the pump mechanism 21a is activated to suck up the liquid pest repellent composition for human use from the inlet pipe 21b and mix air into the foam, which is then discharged from the outlet 21d. The mechanism for mixing air into a liquid pest repellent composition for human use to form foam is well known, and therefore a detailed description thereof will be omitted.

[0018] Although not shown, the foam-discharging container may be an aerosol container. In this case, the container body may contain a gas, and by pressing an operation button, the gas is mixed with the pest repellent composition for human use to form a foam, which is then discharged from the discharge port.

[0019] The pest repellent composition for human use has the property of becoming foamy when used, for example, by using a foam-dispensing container 2. The property of being liquid during transportation, storage, or when on display in a store, and quickly becoming foamy when used, can also be referred to as foamability. In other words, the pest repellent composition for human use according to this embodiment is a foam-forming pest repellent composition for human use, or a pest repellent composition for human use that is used in foam form.

[0020] <Composition of pest repellent for human use> The pest repellent composition for human use contains an active repellent ingredient (a), a silicone surfactant (b), ethanol (c), and water (d). The pest repellent composition for human use may contain ingredients other than the active repellent ingredient (a), the silicone surfactant (b), ethanol (c), and water (d). Each ingredient will be described in detail below, but the example shown below is merely an example.

[0021] <Repellent active ingredient (a)> The repellent active ingredient (a) is an ingredient that has a repellent effect against pests, such as mosquitoes, black flies, stable flies, house mites, bedbugs (cimex lectularius), ticks, chiggers, and fire ants, and any ingredient that has a repellent effect against these pests can be used as the repellent active ingredient (a).

[0022] Such an active repellent ingredient (a) is not particularly limited, and examples thereof include 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-hexyltriethylene glycol monoether, methyl 6-n-pentyl-cyclohexene-1-carboxylate, dimethyl phthalate, eucalyptol, α-pinene, and geraniol. pest repellent components such as citronellal, camphor, linalool, terpenol, carvone, dioctyl phthalate, dibutyl phthalate, naphthalene, cinnamon, camphor, lemongrass, clover, thyme, geranium, bergamot, laurel, pine, red peach, benny royal, eucalyptus, and Indian sedan; and pyrethroid insecticide compounds such as natural pyrethrins, pyrethrins, allethrin, phthalthrin, resmethrin, furamethrin, phenothrin, permethrin, cyphenothrin, prallethrin, etofenprox, empenthrin, and transfluthrin. Any of these may be used alone, or two or more may be used in combination.

[0023] The repellent active ingredient (a) is preferably a repellent active ingredient that is poorly soluble in water but soluble in ethanol, and examples of such repellent active ingredients include icaridin, DEET (diethyltoluamide), 3-(Nn-butyl-N-acetyl)aminopropionic acid ethyl ester (IR3535), p-menthane-3,8-diol, etc. Among these, icaridin or DEET is preferred in terms of the feel and effect when applied to the skin.

[0024] <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.

[0025] <Water(d)> The water (d) is not particularly limited, and examples of usable water (d) include purified water, ion-exchanged water, hot spring water, deep sea water, distilled plant water, fermented liquid, and bark juice.

[0026] <Other ingredients> Examples of other components include surfactants other than silicone surfactants. Other examples include additives such as moisturizers, bactericides / preservatives, thickeners other than water-soluble polymers, pigments, pH adjusters, fragrances, UV absorbers, UV scattering agents, and antioxidants. Any one or any two or more of these may be mixed into the pest repellent composition for human use.

[0027] The other surfactants are not particularly limited, and known surfactants can be used as appropriate. Specific examples include polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbit tetraoleate, polyoxyethylene hydrogenated castor oil, polyoxyethylene polyoxypropylene glycol, etc. These surfactants are preferred because they do not impair the stability of the repellent composition.

[0028] <Concentration of each ingredient> In the pest repellent composition for human use according to this embodiment, the concentration of the repellent active ingredient (a) can be 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 use. 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 pest repellent composition for human use. When the concentration of the repellent active ingredient (a) is equal to or more than the lower limit, the pest repellent effect against pests is easily exhibited when the pest repellent composition for human use is applied to the skin. When the concentration is equal to or less than the upper limit, the foaming property of the pest repellent composition for human use is superior.

[0029] The concentration of the silicone surfactant (b) can be set in the range of 0.001% by mass to 5% by mass, based on the total mass of the pest repellent composition for human use. If the concentration of the silicone surfactant (b) is less than the lower limit, the foaming ability of the pest repellent composition for human use may be reduced, and if it exceeds the upper limit, the feeling of use of the pest repellent composition for human use may be reduced.

[0030] The concentration of ethanol (c) can be set in the range of 25% by mass to 79% by mass based on the total mass of the repellent composition. If the concentration of ethanol (c) is within the above range, the stability of the foam repellent composition will be excellent.

[0031] <Method for preparing repellent composition> The method for preparing the pest repellent composition for human use is not particularly limited, and known methods can be used. For example, the pest repellent composition for human use can be prepared by the following method.

[0032] The repellent active ingredient (a), surfactant (silicone surfactant (b), and other surfactants as needed), ethanol (c), and water (d) are stirred at room temperature, and additives (other ingredients) are added to this mixture as needed and dispersed uniformly. After that, additives such as preservatives and fragrances are added and further stirred.

[0033] <Action and effect> When the pest repellent composition for human use is stored in foam-dispensing container 2 and the user presses down operating part 21c, the foamed pest repellent composition for human use is dispensed from outlet 21d. Because the pest repellent composition for human use is dispensed in foam form, there is no dripping or scattering during use, and furthermore, it feels good in use and is easy to apply evenly to the skin.

[0034] Furthermore, since a silicone surfactant (b) having an HLB value in a specific range (7 or more and 15 or less) is used as the surfactant, a pest repellent composition for human use that has excellent foaming properties can be provided even when it contains a large amount of ethanol (c).

[0035] The pest repellent composition for human use exerts a repellent effect against pests when applied to the skin, for example.

[0036] Furthermore, by applying the pest repellent composition for human use to the human skin, etc., it repels, for example, mosquitoes, black flies, stable flies, house mites, bedbugs (cimex lectularius), ticks, chiggers, fire ants, etc., thereby suppressing damage caused by these pests. [Example]

[0037] The present invention will be explained in more detail below with reference to examples and comparative examples, but the present invention is not limited to these examples.

[0038] <Production Methods of Examples and Comparative Examples> Table 1 shows the types of silicone surfactants and their HLB values.

[0039] [Table 1]

[0040] The repellent active ingredient (a) of the type and in the amount (numbers indicate mass %) shown in Tables 2 to 4 below, surfactant (silicone surfactant (b), and other surfactants as needed), ethanol (c), and water (d) are stirred at room temperature, and additives are added to this mixture as needed and dispersed uniformly, and then additives such as preservatives and fragrances are added and further stirred.

[0041] The "balance" of water in Tables 3 to 5 indicates the amount of water that makes the total amount of the pest repellent composition for human use 100% by mass.

[0042] <Foaming evaluation> The foaming property evaluation will be explained. Using a foam dispenser (Yoshino Kogyo), 5 ml (5 pushes) was dispensed into a measuring cylinder, and the foam volume generated was measured. Foaming property was evaluated based on the measurement results. Foaming property was scored based on Table 2. A foam volume of 10 ml or less was scored as 0, indicating no foaming property.

[0043] The foaming property evaluation method is shown in Table 2. In Table 3, "Immediately after" indicates the foaming property evaluation results immediately after preparation of each Example and Comparative Example, and "1 month after 50°C" indicates the foaming property evaluation results after storage in an environment of 50°C for 1 month after preparation.

[0044] [Table 2]

[0045] [Table 3]

[0046] As shown in Table 3, the pest repellent compositions for human use in Examples 1 to 7 were able to uniformly disperse the repellent active ingredient when the HLB value of the silicone surfactant (b) was in the range of 7 to 15, and also showed good results in the foaming property test. However, foaming property was reduced in Comparative Examples 1 and 2, which had an HLB value of less than 7, Comparative Example 4, which had an HLB value of more than 15, and Comparative Example 3, which contained a silicone oil that was silicone-based but not a surfactant.

[0047] [Table 4]

[0048] As shown in Table 4, in Examples 8 to 10, in which the concentration range of icaridin, the repellent active ingredient (a), was 5% by mass or more and 30% by mass, the repellent active ingredient was uniformly dispersed, and the foaming test results were also good. Example 11 contained an ethanol concentration of 79% by mass, but the foaming test results were good. The repellent compositions of Examples 12 to 15 contained DEET as the repellent active ingredient, and like icaridin, DEET was also uniformly dispersed at a concentration range of 5% by mass or more and 50% by mass or less, and the foaming test results were also good. However, in Comparative Example 5, in which the ethanol content was 80% by mass or more, the foaming properties were reduced.

[0049] [Table 5]

[0050] As shown in Table 5, the repellent compositions of Examples 16 to 20 contained 0.001% by mass or more and 5% by mass or less of silicone surfactant (b), and the human pest repellent composition of Example 21 contained 25% by mass of ethanol, but the results of the foaming test were good.

[0051] On the other hand, the pest repellent compositions for human use of Comparative Examples 7 and 8, in which a nonionic surfactant was added as a surfactant, all showed reduced foaming properties.

[0052] Furthermore, the human pest repellent composition of Comparative Example 6 contained 0.0001% by mass of silicone surfactant (b), and the human pest repellent composition of Comparative Example 9 contained 20% by mass of ethanol, but the foaming properties were reduced.

[0053] [Table 6]

[0054] As shown in Table 6, the pest repellent composition for human use in Example 5 was confirmed to have foaming properties when discharged from a foam discharge container, but was not confirmed to have foaming properties when discharged from a pump mist container.

[0055] <Scattering evaluation> The pest repellent composition for human use was evenly applied to the inside of the forearm of five subjects, and the scattering of insects was evaluated based on the evaluation results of the subjects according to the following criteria. The results are shown in Table 7.

[0056] (Evaluation criteria) 〇: All five participants did not feel any dust flying around.

[0057] ×: One or more people felt the dust flying.

[0058] <Drip evaluation> The pest repellent compositions for human use were applied to the inside of the forearms of five subjects, and the subjects evaluated the resistance to dripping according to the following criteria. The results are shown in Table 7.

[0059] (Evaluation criteria) 〇: All five participants did not experience any dripping.

[0060] ×: One or more people experienced dripping.

[0061] <Evaluation of ease of uniform application> The pest repellent compositions for human use were applied to the inside of the forearms of five subjects, and the ease of uniform application was evaluated based on the evaluation results of the subjects according to the following criteria. The results are shown in Table 7.

[0062] (Evaluation criteria) 〇: All five people felt that it was easy to apply evenly.

[0063] ×: One or more people found it difficult to apply evenly.

[0064] <Evaluation of mucosal irritation during spraying> The pest repellent composition for human use was applied evenly to the inside of the forearm of five subjects, and the irritation sensation was evaluated based on the evaluation results of the subjects according to the following criteria. The results are shown in Table 7.

[0065] (Evaluation criteria) 〇: All five participants felt no irritation.

[0066] ×: One or more people felt irritation.

[0067] [Table 7]

[0068] As shown in Table 7, the human pest repellent composition of Example 5 did not scatter the repellent active ingredient, caused less irritation during use, and did not drip, compared to commercially available product A (mist) and commercially available product B (aerosol).

[0069] <Bloodsucking prevention effect> The human pest repellent composition was evenly applied to the inside of the forearm of three subjects, and a syringe containing 10 female Aedes albopictus mosquitoes was pressed against the skin for 1 minute after each time period, and the number of blood-sucked mosquitoes was counted, and the repellent effect was measured and evaluated. The results are shown in Table 8 and Table 9.

[0070] [Table 8]

[0071] [Table 9]

[0072] As shown in Table 9, it was confirmed that the pest repellent compositions for human use of the Examples had the same or higher blood-sucking inhibitory effect as the commercially available product A (mist).

[0073] The above-described embodiments are merely examples in all respects and should not be construed as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention. [Industrial Applicability]

[0074] As explained above, the pest repellent composition for human use according to the present invention is used to repel pests such as mosquitoes, black flies, stable flies, house mites, bedbugs (cimex lectularius), ticks, chiggers, and fire ants, and can also be used, for example, as an insect repellent to be applied to human skin, or as an insect repellent to be applied to the epidermis of pets and livestock. [Explanation of symbols]

[0075] 1. Personal pest repellent products 2 Foam dispensing container 20 Container body 21 Manual Pump 21a Pump mechanism 21b Suction pipe 21c Control unit 21d outlet

Claims

1. A foam-like pest repellent composition for human use, comprising an active repellent ingredient (a), a silicone surfactant (b), ethanol (c), and water (d), 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% by mass or more and 5% by mass or less; A pest repellent composition for human use, wherein the concentration of the ethanol (c) is 25% by mass or more and 79% by mass or less.

2. 2. The pest repellent composition for human use according to claim 1, wherein the repellent active ingredient (a) is at least one selected from the group consisting of icaridin and DEET.

3. 2. The pest repellent composition for human use according to claim 1, wherein the concentration of the repellent active ingredient (a) is in the range of 5% by mass or more and 50% by mass or less.

4. 4. The pest repellent composition for human use according to claim 3, wherein the concentration of the repellent active ingredient (a) is 30% by mass or less.

5. A pest repellent composition for human use according to any one of claims 1 to 4, A pest repellent product for human use, comprising a foam-dispensing container that contains the pest repellent composition for human use and dispenses the pest repellent composition for human use in the form of foam.

Images