JP7131957B2 - Aerosol composition - Google Patents

Description

The present invention relates to aerosol compositions. More specifically, the present invention can easily emulsify and re-emulsify the undiluted liquid and liquefied gas even though the undiluted liquid contains a high concentration of pest repellent ingredients, and has a cooling sensation and breakage. The present invention relates to an aerosol composition capable of ejecting a foamy discharge.

In recent years, aerosol compositions containing pest repellent components have been developed for the prevention of infectious diseases such as dengue fever mediated by pests (mosquitoes) (Patent Documents 1 and 2). Patent Document 1 discloses an insect repellent cracking aerosol composition comprising an oil-in-water emulsion containing deet, which is an insect repellent, water, and a predetermined surfactant. Patent Document 2 discloses a foaming aerosol composition consisting of a stock solution and a liquefied gas, wherein the stock solution contains a sparingly water-soluble active ingredient such as an insect repellent, a surfactant with a predetermined HLB, and a carbon number of 2 to 3. and water are disclosed.

JP 2013-203663 A WO2012/33196

In order to enhance the pest repellent effect in products containing such pest repellent ingredients, it is necessary to incorporate a large amount of pest repellent ingredients such as DEET (N,N-diethyl-m-toluamide). However, many such pest repellents (particularly DEET) are oil-soluble and tend to be sticky. It is conceivable to emulsify with water to improve stickiness. However, such pest repellents are difficult to emulsify with water and have poor emulsion stability. Therefore, when an aerosol composition containing a large amount of such pest repellent is ejected, the aerosol composition tends to separate during ejection and is difficult to eject with a uniform composition. It is difficult for the aerosol compositions of Patent Documents 1 and 2 to exhibit sufficient emulsifiability and re-emulsifiability when a high amount (for example, 25% by mass or more) of an insect repellent component is blended.

The present invention has been made in view of such conventional problems, and makes it possible to easily emulsify and re-emulsify a stock solution and a liquefied gas even though the stock solution contains a high concentration of pest repellent ingredients. An object of the present invention is to provide an aerosol composition which can be discharged, has a feeling of cooling, and emits a popping sound.

The present invention for solving the above problems mainly includes the following configurations.

(1) Consisting of an undiluted solution containing a pest repelling component, a surfactant, a water-soluble polymer and water, and a liquefied gas, wherein the undiluted solution and the liquefied gas are emulsified, and the undiluted solution contains the pest repelling component. 25 to 35% by mass, the surfactant includes a low HLB surfactant with an HLB of less than 8 and a high HLB surfactant with an HLB of 11 or more, and the content of the stock solution is 35 to 70% by mass. %, and the content of the liquefied gas is 30 to 65% by mass.

According to such a configuration, the aerosol composition of the present invention comprises a low HLB surfactant with an HLB of less than 8 and a high HLB surfactant with an HLB of 11 or greater. By using two types of surfactants with HLB in such a specific range, the aerosol composition can be liquefied with the stock solution even if the stock solution contains 25 to 35 masses of the pest repellent component. Gases can be easily emulsified and re-emulsified. Therefore, the aerosol composition can be discharged with a uniform composition, can be easily spread over an object such as an arm, has a cooling sensation, and can form a discharge that emits a bubbling sound.

(2) The aerosol composition according to (1), wherein the difference in HLB between the low HLB surfactant and the high HLB surfactant is 6 or more.

According to such a configuration, the aerosol composition is particularly easy to emulsify the pest repellent component blended to a high concentration.

(3) The aerosol composition of (1) or (2), wherein the high HLB surfactant comprises a polyoxyethylene alkyl ether.

According to such a configuration, the aerosol composition is particularly easy to emulsify the pest repellent component blended to a high concentration.

(4) The aerosol composition according to any one of (1) to (3), wherein the pest repellent component contains N,N-diethyl-m-toluamide.

N,N-diethyl-m-toluamide (deet) is a pest repellent ingredient that is particularly difficult to emulsify. The aerosol composition of the present invention emulsifies the undiluted solution and the liquefied gas even when the N,N-diethyl-m-toluamide, which is difficult to emulsify, is formulated at a high concentration. and easy to re-emulsify.

According to the present invention, the undiluted liquid and the liquefied gas can be easily emulsified and re-emulsified in spite of the fact that the undiluted liquid contains a high-concentration pest-repellent component, and there is a feeling of cooling and a breaking sound. It is possible to provide an aerosol composition that can be ejected.

<Aerosol composition>
An aerosol composition of one embodiment of the present invention comprises a stock solution containing an insect repellent component, a surfactant, a water-soluble polymer and water, and a liquefied gas. The stock solution and the liquefied gas are emulsified. The stock solution contains 25-35% by mass of the pest repellent component. Surfactants include low HLB surfactants with an HLB of less than 8 and high HLB surfactants with an HLB of 11 or greater. The content of the stock solution is 35-70% by mass. The content of liquefied gas is 30-65% by weight. Each of these will be described below.

(Undiluted solution)
The stock solution is a liquid component that constitutes the aerosol composition, and contains an insect repellent component, a surfactant, a water-soluble polymer, and water.

• Insect repellent component The insect repellent component is not particularly limited. By way of example, pest repellent ingredients include N,N-diethyl-m-toluamide (deet), di-n-butylsuccinate, hydroxyanisole, rotenone, ethyl-butylacetylaminopropionate, icaridin (picaridin), p-menthane-3,8-diol, ethyl 3-[acetyl(butyl)amino]propionate, 1-methylpropyl 2-(2-hydroxyethyl)piperidine-1-carboxylate and the like. A pest repellent component may be used in combination. These pest-repellent ingredients are generally difficult to emulsify with water or the like in the stock solution. However, in the aerosol composition of the present embodiment, even when the pest repellent component, which is difficult to emulsify, is highly blended so as to be 25 to 35% by mass in the concentrate, the concentrate and the liquefied gas can be easily emulsified, and the emulsified state can be stably maintained.

The content of the pest repellent component may be 25% by mass or more, preferably 27% by mass or more, in the stock solution. Moreover, the content of the pest-repellent component may be 35% by mass or less, preferably 33% by mass or less, in the stock solution. If the content of the pest-repellent component is less than 25% by mass, the aerosol composition tends to be insufficient to exhibit the extremely excellent pest-repellent effect that has been demanded in recent years. On the other hand, when the content of the pest repellent component exceeds 35% by mass, the aerosol composition tends to be insufficiently emulsified or to have low emulsification stability.

The insect pests to be repelled by the insect pest repelling component of the present embodiment are not particularly limited. For example, the target pests are pests that inhabit indoors and outdoors, such as flying pests and creeping pests. More specifically, flying pests are mosquitoes, horse flies, blackflies, biting midges, wasps, and other pests with landing behavior. Crawling pests include ants, cockroaches, pill bugs, longhorn beetles, woodlice, ants, termites, centipedes, millipedes, bed bugs, ticks, house dust mites, and Yamabiru.

・Surfactant The surfactant plays a role of emulsifying the pest repellent component in the stock solution, emulsifying the stock solution and the liquefied gas, and holding the liquefied gas in the discharge immediately after discharge to foam the discharge. Formulated for a role. Surfactants include low HLB surfactants with an HLB of less than 8 and high HLB surfactants with an HLB of 11 or greater.

The low HLB surfactant is not particularly limited as long as it has an HLB of less than 8. By way of example, low HLB surfactants include polyoxyethylene hydrogenated castor oils such as POE (5) hydrogenated castor oil (HLB 6.0), POE (10) hydrogenated castor oil (HLB 6.5), sorbitan monopalmitate (HLB6.7), sorbitan monostearate (HLB4.7), sorbitan monooleate (HLB5.0), sorbitan fatty acid esters such as sorbitan sesquioleate (HLB3.7), glyceryl monostearate (HLB3.0) , monoglycerin fatty acid esters such as glyceryl monooleate (HLB2.5), diglyceryl monooleate (HLB5.5), polyglycerin fatty acid esters such as tetraglyceryl monooleate (HLB6.0), POE (2) oleyl Polyoxyethylene alkyl ethers such as ether (HLB7.5), POE(5) behenyl ether (HLB7.0), POE(2) monostearate (HLB4.0), POE(4) monostearate (HLB6.5 ) and other polyethylene glycol fatty acid esters. Among these, low HLB surfactants are polyoxyethylene hydrogenated castor oil, sorbitan fatty acid esters, polyglycerin fatty acid esters, polyethylene glycol fatty acids, because they easily emulsify the above pest repellent ingredients that are blended to a high concentration. At least one selected from esters is preferred. A low HLB surfactant may be used in combination.

The low HLB surfactant may have an HLB of less than 8, more preferably 7.5 or less. As a result, the difference in HLB from the high HLB surfactant described later is likely to be 7 or more, and the pest repellent component blended to have a high concentration can be more easily emulsified.

The content of the low HLB surfactant is not particularly limited. For example, the content of the low HLB surfactant is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, in the stock solution. Also, the content of the low HLB surfactant is preferably 10% by mass or less, more preferably 8% by mass or less, in the undiluted solution. When the content of the low-HLB surfactant is within the above range, the aerosol composition can more easily emulsify the pest repellent component, which is blended to a high concentration, and combine the stock solution and the liquefied gas. Easy to emulsify.

The high HLB surfactant is not particularly limited as long as it has an HLB of 11 or more. By way of example, high HLB surfactants are POE (40) hydrogenated castor oil (HLB 12.5), POE (50) hydrogenated castor oil (HLB 13.5), POE (60) hydrogenated castor oil (HLB 14.0) , POE (80) hydrogenated castor oil (HLB 15.0), POE (100) hydrogenated castor oil (HLB 16.5), polyoxyethylene hydrogenated castor oil, decaglyceryl monolaurate (HLB 15.5), decaglyceryl monomill Polyglycerin fatty acid esters such as state (HLB14.0), decaglyceryl monooleate (HLB12.0), hexaglyceryl monolaurate (HLB14.5), hexaglyceryl monomyristate (HLB11.0), POE (20) Sorbitan monolaurate (HLB16.9), POE (20) sorbitan monopalmitate (HLB15.6), POE (20) sorbitan monostearate (HLB14.9), POE (20) sorbitan trioleate (HLB11.0) Polyoxyethylene sorbitan fatty acid esters such as POE (30) sorbitol tetraoleate (HLB 11.5) and other polyoxyethylene sorbit fatty acid esters POE (9) lauryl ether (HLB 14.5) POE (21) lauryl ether ( HLB 19.0), POE (15) cetyl ether (HLB 15.5), POE (20) cetyl ether (HLB 17.0), POE (30) cetyl ether (HLB 19.5), POE (20) stearyl ether (HLB 18.5) 0), polyoxyethylene alkyl ethers such as POE (10) oleyl ether (HLB 14.0), POE (20) behenyl ether (HLB 16.5), POE (20) POP (8) cetyl ether (HLB 12.5), Polyoxyethylene polyoxypropylene alkyl ethers such as POE (20) POP (6) decyltetradecyl ether (HLB 11.0), POE (15) glyceryl monooleate (HLB 14.5), POE (15) glyceryl monostearate Polyoxyethylene glycerin fatty acid esters such as (HLB 13.5), polyethylene glycol fatty acid esters such as POE (10) monolaurate (HLB 12.5) and POE (25) monostearate (HLB 15.0). Among these, the high HLB surfactant is preferably a polyoxyethylene alkyl ether because it is particularly easy to emulsify the pest repellent component that is blended at a high concentration. A high HLB surfactant may be used in combination.

The high HLB surfactant may have an HLB of 11 or more, more preferably 11.5 or more. As a result, the HLB difference from the low HLB surfactant is likely to be 6 or more, and the pest repellent component blended to have a high concentration is more easily emulsified.

The content of the high HLB surfactant is not particularly limited. For example, the content of the high HLB surfactant is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, in the stock solution. Also, the content of the high HLB surfactant is preferably 10% by mass or less, more preferably 8% by mass or less, in the undiluted solution. By setting the content of the high-HLB surfactant within the above range, the aerosol composition can more easily emulsify the pest-repellent component, which is blended at a high concentration, and combine the stock solution and the liquefied gas. Easy to emulsify.

The difference in HLB between the low HLB surfactant and the high HLB surfactant is preferably 6 or more, more preferably 7 or more. When the difference in HLB is 6 or more, the aerosol composition is particularly easy to emulsify the pest repellent component that is blended at a high concentration.

In addition, the stock solution of the present embodiment only needs to contain the low HLB surfactant and the high HLB surfactant, and may contain other surfactants. In one example, the other surfactant is a surfactant with an HLB of 8 or more and less than 11. Other such surfactants include polyglycerin fatty acid ester POE (6) sorbitan monostearate (HLB 9.5), hexaglyceryl monostearate (HLB 9.0), hexaglyceryl monooleate (HLB 9.0), etc. , POE (20) polyoxyethylene sorbitan fatty acid esters such as sorbitan tristearate (HLB 10.5), POE (2) lauryl ether (HLB 9.5), POE (2) cetyl ether (HLB 8.0), POE (4 ) Polyoxyethylene alkyl ethers such as stearyl ether (HLB9.0), POE (10) behenyl ether (HLB10.0), POE (10) POP (4) cetyl ether (HLB9.5), POE (12) POP ( 6) Polyoxyethylene polyoxypropylene alkyl ethers such as decyltetradecyl ether (HLB 8.5), polyoxyethylene glycerin fatty acid esters such as POE (5) glyceryl monostearate (HLB 9.5), and the like.

・Water-soluble polymer Water-soluble polymer adjusts the viscosity of the stock solution, retains the liquefied gas in the discharge for a long time, increases the breaking sound, and facilitates emulsification of the aerosol composition (initial emulsification ) is added to improve

The water-soluble polymer is not particularly limited. For example, water-soluble polymers include gum substances such as xanthan gum, carrageenan, gum arabic, tragacanth gum, cationic guar gum, guar gum, and gellan gum; Polymers; dextran, sodium carboxymethyldextran, dextrin, pectin, starch, corn starch, wheat starch, sodium alginate, modified potato starch, sodium hyaluronate, polyvinyl alcohol, carboxyvinyl polymer, and the like. Among these, the water-soluble polymer is preferably a cellulose-based polymer because it can easily improve the ease of emulsification of the aerosol composition. A water-soluble polymer may be used in combination.

The content of the water-soluble polymer is not particularly limited. For example, the content of the water-soluble polymer is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, in the undiluted solution. Also, the content of the water-soluble polymer is preferably 5% by mass or less, more preferably 2% by mass or less, in the stock solution. When the content of the water-soluble polymer is within the above range, the aerosol composition tends to improve the easiness of emulsification between the stock solution and the liquefied gas.

In general, when the viscosity of the stock solution increases due to the addition of the water-soluble polymer, the ease of emulsifying the stock solution and the liquefied gas tends to decrease. However, the aerosol composition of the present embodiment, contrary to such common technical knowledge, contains an insect repellent component at a high concentration and contains the above-described predetermined amount of water-soluble polymer, thereby emulsifying the aerosol composition. Improves ease.

・Water Water is the main solvent of the stock solution. Water includes purified water, ion-exchanged water, physiological saline, deep sea water, and the like.

The content of water is not particularly limited. For example, the content of water in the undiluted solution is preferably 40% by mass or more, more preferably 50% by mass or more. Also, the content of water is preferably 74% by mass or less, more preferably 70% by mass or less, in the undiluted solution. When the water content is within the above range, the aerosol composition can easily emulsify the stock solution and the liquefied gas, and can easily incorporate a required amount of a surfactant required for emulsification.

• Active Ingredients Returning to the description of the concentrate as a whole, the concentrate may contain an appropriate active ingredient in addition to the above ingredients. Active ingredients include ethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, collagen, xylitol, sorbitol, hyaluronic acid, sodium lactate, dl-pyrrolidone carboxylate, keratin, lecithin, humectants such as urea; l- Refreshing agents such as menthol and camphor; antipruritic agents such as crotamiton and d-camphor; astringents such as zinc oxide, allantoin hydroxyaluminum, tannic acid, citric acid, and lactic acid; paraoxybenzoic acid ester, phenoxyethanol, benzalkonium chloride, chloride Bactericides/disinfectants such as benzethonium and chlorhexidine chloride; UV absorbers such as 2-ethylhexyl paramethoxycinnamate, ethylhexyl triazone, and oxybenzone; UV scattering agents such as zinc oxide and titanium oxide; retinol, retinol acetate, and retinol palmitate , ascorbic acid, sodium ascorbate, dl-α-tocopherol, tocopherol acetate, tocopherol and mixtures thereof; extracts such as seaweed extract, placenta extract and silk extract; whitening agents such as arbutin and kojic acid; various fragrances such as natural fragrances and synthetic fragrances; Active ingredients may be used in combination.

When an active ingredient is contained, the content of the active ingredient is preferably 0.01 to 10% by mass, more preferably 0.1 to 8% by mass, in the stock solution. When the content of the active ingredient is within the above range, the effect of blending the active ingredient is likely to be obtained appropriately. If it is less than 0.01% by weight, the effect of the active ingredient tends to be insufficient, and if it is more than 10% by weight, the concentration of the active ingredient becomes too high, and depending on the active ingredient, it may adversely affect the human body. be.

Also, the aerosol composition of the present embodiment may contain alcohol, oil, powder, and the like.

Alcohol is preferably blended as a solvent for dissolving active ingredients that are difficult to dissolve in water, for the purpose of adjusting the foaming sound when sprayed, speeding up drying to suppress stickiness, and the like.

Alcohol is not particularly limited. For example, the alcohol is monohydric alcohol having 2 to 3 carbon atoms such as ethanol and isopropanol. Alcohol may be used in combination.

When alcohol is contained, the content of alcohol is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, in the stock solution. Also, the alcohol content is preferably 20% by mass or less, more preferably 15% by mass or less. When the alcohol content is within the above range, the stock solution and the liquefied gas are easily emulsified appropriately, and the effect of blending the above alcohol is likely to be exhibited.

The oil is preferably blended for the purpose of adjusting the emulsified state of the stock solution and the liquefied gas, moisturizing the skin, improving slipperiness, and the like.

The oil content is not particularly limited. Examples of oils include jojoba oil, avocado oil, macadamia nut oil, olive oil, camellia oil; isopropyl myristate, cetyl octanoate, octyldodecyl myristate, diisobutyl adipate, diethoxyethyl succinate, apple Ester oils such as diisostearyl acid; Hydrocarbon oils such as squalene, squalane, and liquid paraffin; Methylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, methylcyclopolysiloxane, tetrahydrotetramethylcyclotetrasiloxane, octa Silicone oils such as methyltrisiloxane, decamethyltetrasiloxane, and methylphenylpolysiloxane; fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid; lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, higher alcohols such as lanolin alcohol; waxes such as beeswax and lanolin wax; An oil component may be used in combination.

When oil is contained, the content of oil is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, in the undiluted solution. In addition, the oil content is preferably 15% by mass or less, more preferably 10% by mass or less, in the undiluted solution. When the oil content is within the above range, the undiluted solution and the liquefied gas are easily emulsified appropriately, and the effect of blending the above oil is likely to be exhibited.

The powder is preferably blended for the purpose of facilitating emulsification of the stock solution and liquefied gas, improving emulsification stability, and the like.

Powder is not particularly limited. Examples of powders include talc, zinc oxide, titanium oxide, silica, zeolite, kaolin, mica, magnesium carbonate, calcium carbonate, zinc silicate, magnesium silicate, aluminum silicate, calcium silicate, and the like. Powder may be used in combination.

When powder is contained, the content of powder is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, in the stock solution. Also, the content of the powder is preferably 5% by mass or less, more preferably 3% by mass or less. When the content of the powder is within the above range, the stock solution and the liquefied gas are easily emulsified appropriately, and when the aerosol composition is discharged, the discharge passage of the aerosol product is less likely to be clogged with the powder.

Returning to the description of the whole stock solution, the content of the stock solution may be 35% by mass or more, preferably 40% by mass or more, in the aerosol composition. Moreover, the content of the stock solution may be 70% by mass or less, preferably 65% by mass or less, in the aerosol composition. If the content of the stock solution is less than 35% by mass, it becomes difficult for the aerosol composition to emulsify the stock solution and the liquefied gas. On the other hand, when the content of the stock solution exceeds 70% by mass, the aerosol composition is less likely to produce a popping sound, making it difficult to obtain a refreshing feeling.

The viscosity of the stock solution is not particularly limited. For example, the viscosity (20° C.) of the stock solution is preferably 10 mPa·s or more, more preferably 100 mPa·s or more. Further, the viscosity of the stock solution is preferably 20000 mPa·s or less, more preferably 10000 mPa·s or less. When the viscosity of the stock solution is within the above range, the aerosol composition is easily emulsified by mixing the stock solution and the liquefied gas, and has excellent emulsification stability. The viscosity can be measured with a B-type rotational viscometer. The viscosity measurement conditions (rotor speed, rotor number, etc.) can be appropriately selected based on the viscosity of the undiluted solution to be measured. For example, for a relatively low-viscosity stock solution of several hundred to several thousand mPa s, the above-mentioned The viscosity of the stock solution can be appropriately measured within the measurable range of the B-type rotational viscometer. On the other hand, for relatively high-viscosity stock solutions of several thousand to several tens of thousands of mPa·s, rotor No. 3 or rotor No. 4 is used, and the above The viscosity of the stock solution can be appropriately measured within the measurable range of the B-type rotational viscometer.

(liquefied gas)
A liquefied gas is a liquid component that has a vapor pressure that emulsifies with a stock solution when pressurized and sealed in an aerosol container. In addition, the liquefied gas is retained in the discharge immediately after discharge and foams, and when the bubbles burst, it makes a fizzy sound that makes a sizzling sound. It is contained for the purpose of granting.

Liquefied gas is not particularly limited. By way of example, liquefied gases include propane, n-butane, isobutane, n-pentane, isopentane and mixtures thereof, aliphatic hydrocarbons having 3 to 5 carbon atoms, trans-1,3,3,3-tetra Fluoroprop-1-ene (HFO-1234ze), trans-2,3,3,3-tetrafluoroprop-1-ene (HFO-1234yf), 1-chloro-3,3,3-trifluoropropene (HFO -1233zd), dimethyl ether, and mixtures thereof. Among these, the liquefied gas is preferably an aliphatic hydrocarbon or a hydrofluoroolefin, which are hydrophobic liquefied gases, because they are easily emulsified with the stock solution. A liquefied gas may be used in combination.

The content of the liquefied gas in the aerosol composition may be 30% by mass or more, preferably 35% by mass or more. Moreover, the content of the liquefied gas in the aerosol composition may be 65% by mass or less, preferably 60% by mass or less. If the liquefied gas content is less than 30% by mass, the aerosol composition tends to have a weak cooling sensation and a low foam breaking sound. On the other hand, when the content of the liquefied gas exceeds 65% by mass, it becomes difficult for the aerosol composition to emulsify the liquefied gas and the undiluted solution.

The aerosol composition may be used in combination with a compressed gas such as nitrogen, air, carbon dioxide, or nitrous oxide as a pressurizing agent.

The method for producing an aerosol product filled with the aerosol composition of the present embodiment is not particularly limited. To give an example, first, the stock solution is filled in the container body. Next, an aerosol valve is attached to the opening of the container body, and the liquefied gas is filled from the aerosol valve. The liquefied gas may be filled through the gap between the two before attaching the aerosol valve to the container body. Further, the container body is shaken to emulsify the undiluted solution and the liquefied gas. A dispensing member is then attached to the stem of the aerosol valve and a cap is attached to the aerosol container to produce the aerosol product.

The resulting aerosol product can dispense the aerosol composition by operating the dispense member. In the discharged aerosol composition, the liquefied gas is vaporized to form a foamy discharge. This ejected matter has a uniform composition, is easily spreadable on an object such as an arm, has a cooling sensation, and emits a hissing sound.

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. The present invention is by no means limited to these examples.

(Example 1)
A stock solution was prepared according to the formulation shown in Table 1 below, 60.0 g of the obtained stock solution was filled in an aluminum pressure-resistant container, and an aerosol valve was fixed. 40.0 g of liquefied petroleum gas (*1) was filled from the aerosol valve, and the stock solution and liquefied petroleum gas were mixed to produce an aerosol composition. A discharge member (the cross-sectional area of the discharge hole is 3.8 mm ² ) was attached to the obtained aerosol composition to produce an aerosol product.
*1: A mixture of isobutane and normal butane, pressure at 20°C is 0.15 MPa

(Examples 2 to 34, Comparative Examples 1 to 5)
Each aerosol composition and aerosol product were produced in the same manner as in Example 1, except that the formulations shown in Tables 1 to 3 were changed.

Using the aerosol compositions and aerosol products of Examples 1 to 34 and Comparative Examples 1 to 5, initial emulsification, re-emulsification and the state of the ejected product were evaluated by the following evaluation methods. The results are shown in Tables 1-3.

<Initial emulsification>
The aerosol product immediately after being filled with the stock solution and the liquefied gas was shaken with an amplitude width of 30 cm, and the number of times of shaking required for initial emulsification was evaluated according to the following evaluation criteria. The number of times of shaking was one reciprocation.
(Evaluation criteria)
A: The aerosol composition was emulsified by shaking less than 10 times.
Good: The aerosol composition was emulsified by shaking 10 to 20 times.
Δ: The aerosol composition was emulsified by shaking 21 to 30 times.
x: The aerosol composition was not emulsified even after being shaken 30 times.

<Re-emulsification>
The aerosol product is allowed to stand in a constant temperature room at 45°C for 1 month to separate the stock solution and the liquefied gas, and the aerosol product is immersed in a constant temperature water bath at 25°C for 1 hour to adjust the aerosol composition to 25°C. The aerosol product was shaken with an amplitude width of 30 cm, and the number of times of shaking required for re-emulsification was evaluated according to the following evaluation criteria.
(Evaluation criteria)
A: The aerosol composition was re-emulsified by shaking less than 10 times.
◯: The aerosol composition was re-emulsified by shaking 10 to 20 times.
x: The aerosol composition was re-emulsified by shaking 21 to 30 times.
-: Evaluation was not possible because the aerosol composition was not emulsified in the initial emulsification.

<State of discharge>
The aerosol product was immersed in a constant temperature water bath at 25°C for 1 hour to adjust the aerosol composition to 25°C, ejected from the aerosol product, and the condition of the ejected product was evaluated according to the following evaluation criteria.
(Evaluation criteria)
◯: The ejected material emitted a hissing sound when the bubbles popped.
Δ: The ejected material produced a hissing sound when the bubbles popped, but the sound was small.
x: The ejected material did not make a popping sound when the foam popped.

As shown in Tables 1 to 3, all of the aerosol compositions of Examples 1 to 34 were easy to initially emulsify and easy to re-emulsify after separation. In addition, these aerosol compositions produced a hissing sound after being discharged. On the other hand, the aerosol composition of Comparative Example 1 containing no water-soluble polymer, the aerosol composition of Comparative Example 2 containing no high HLB surfactant, and the aerosol composition of Comparative Example 3 containing no low HLB surfactant. Neither the aerosol composition of Comparative Example 4, which contained a small amount of raw material or stock solution, did not undergo initial emulsification even after being shaken 30 times. In addition, these aerosol compositions could not generate a popping sound after ejection. The aerosol composition of Comparative Example 5, which did not contain a low HLB surfactant, was difficult to emulsify initially and was difficult to re-emulsify after separation. In addition, these aerosol compositions produced a small squealing sound after ejection.

Claims (4)

Consisting of an undiluted solution containing pest repellent components, surfactants, water-soluble polymers and water, and liquefied gas,
The stock solution and the liquefied gas are emulsified,
The stock solution is
Contains 25 to 35% by mass of pest repellent components,
The surfactant includes a low HLB surfactant with an HLB of 7.5 or less and a high HLB surfactant with an HLB of 11 or more,
The content of the stock solution is 35 to 70% by mass,
The content of the liquefied gas is 30 to 65% by mass ,
The pest repellent component includes N,N-diethyl-m-toluamide, di-n-butylsuccinate, hydroxyanisole, rotenone, ethyl-butylacetylaminopropionate, icaridin, p-menthane-3,8-diol, An aerosol composition comprising at least one of ethyl 3-[acetyl(butyl)amino]propionate and 1-methylpropyl 2-(2-hydroxyethyl)piperidine-1-carboxylate . 2. The aerosol composition of claim 1, wherein the HLB difference between the low HLB surfactant and the high HLB surfactant is 6 or greater. 3. An aerosol composition according to claim 1 or 2, wherein the high HLB surfactant comprises a polyoxyethylene alkyl ether. An aerosol composition according to any preceding claim, wherein the pest repellent component comprises N,N-diethyl-m-toluamide.