Aerosol composition

Abstract

The present invention provides an aerosol composition that does not require emulsification of water and liquefied gas, can be uniformly dispersed for several seconds (e.g., 2 seconds or more) by shaking the container before spraying, can be sprayed with a stable composition, and produces a freezing spray that provides a sustained cooling effect. [Solution] An aerosol composition comprising water, a hydrofluoroolefin having a boiling point of 5 to 30°C, and dimethyl ether, wherein the dimethyl ether content is 10 to 40% by mass, and the composition is separated into two layers.

Description

Technical Field

[0001] The present invention relates to an aerosol composition. More specifically, the present invention does not require emulsifying an aqueous stock solution and a liquefied gas, and by shaking the container before injection, it can be uniformly dispersed for several seconds (for example, 2 seconds or more), can be injected with a stable composition, and can obtain a frozen injection product and can sustain a cooling effect. The present invention relates to an aerosol composition.

Background Art

[0002] Conventionally, aerosol compositions for forming frozen substances have been developed. Patent Document 1 discloses an aerosol composition containing an aqueous stock solution containing a surfactant and water, a first hydrofluoroolefin having a boiling point of 5 to 30°C, and a second hydrofluoroolefin having a boiling point of -30 to -5°C, in which the aqueous stock solution is emulsified with a mixture of the first hydrofluoroolefin and the second hydrofluoroolefin. This aerosol composition contains hydrofluoroolefins having different boiling points, and after being injected, it is easy to adjust the timing of vaporization of the hydrofluoroolefin, prevent freezing immediately before the injection hole, and make it difficult to clog the injection nozzle, and can form a frozen substance after adhering to the application site.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the aerosol composition described in Patent Document 1 requires a large amount of a second hydrofluoroolefin, which has a boiling point of -30 to -5°C, to be contained in the aerosol composition (40 to 80% by mass) in order for the spray to freeze. Furthermore, the aerosol composition described in Patent Document 1 requires emulsification of the aqueous stock solution and the hydrofluoroolefin, which makes the preparation time-consuming.

[0005] The present invention has been made in view of the above-mentioned conventional problems, and aims to provide an aerosol composition that does not require emulsification of water and liquefied gas, can be uniformly dispersed for several seconds (for example, 2 seconds or more) by shaking the container before spraying, can be sprayed with a stable composition, and produces a spray that freezes, and can sustain a cooling effect. [Means for solving the problem]

[0006] The present invention, which solves the above problems, mainly comprises the following configuration.

[0007] (1) An aerosol composition comprising water, a hydrofluoroolefin having a boiling point of 5 to 30°C, and dimethyl ether, wherein the dimethyl ether content is 10 to 40% by mass, and the composition is separated into two layers.

[0008] With this configuration, dimethyl ether dissolves in both water and hydrofluoroolefin. As a result, it separates into two layers: a first layer (water + dimethyl ether) and a second layer (hydrofluoroolefin + dimethyl ether). The first and second layers can be dispersed for at least two seconds by shaking the container. As a result, by shaking before use, the aerosol composition can be sprayed with a stable composition. Such an aerosol composition does not require emulsification of the stock solution and liquefied gas, thus reducing the effort required for preparation. Furthermore, dimethyl ether dissolves in water and hydrofluoroolefin in different amounts. Therefore, the dimethyl ether dissolved in the first and second layers vaporizes at different times. As a result, the resulting spray cools to a soft slushy state, then freezes and changes to a sherbet-like state, thus providing a sustained cooling effect.

[0009] (2) The aerosol composition according to (1), wherein the water content is 5 to 50% by mass, and the hydrofluoroolefin content having a boiling point of 5 to 30°C is 25 to 70% by mass.

[0010] With this configuration, the aerosol composition can be more easily dispersed by shaking the container, and can be sprayed with a more stable composition.

[0011] (3) The aerosol composition according to (1) or (2), wherein the mass ratio of water to the hydrofluoroolefin having a boiling point of 5 to 30°C is 60 / 40 to 10 / 90.

[0012] With this configuration, the aerosol composition is such that dimethyl ether readily dissolves in both water and hydrofluoroolefin. As a result, the aerosol composition easily separates into two layers, and shaking the container keeps it dispersed for at least two seconds. Furthermore, the sprayed material cools to a soft, slushy consistency, and then freezes into a sherbet-like state, thus providing a sustained cooling effect. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide an aerosol composition that does not require emulsification of water and liquefied gas, can be uniformly dispersed for several seconds (for example, 2 seconds or more) by shaking the container before spraying, can be sprayed with a stable composition, and produces a spray that freezes, thus providing a sustained cooling effect. [Brief explanation of the drawing]

[0014] [Figure 1] Figure 1 is a graph showing the change in temperature over time of the sprayed material when the aerosol compositions of the examples and comparative examples are sprayed. [Modes for carrying out the invention]

[0015] <Aerosol composition> An aerosol composition according to one embodiment of the present invention contains water, a hydrofluoroolefin having a boiling point of 5 to 30°C, and dimethyl ether. The dimethyl ether content is 10 to 40% by mass. The aerosol composition is separated into two layers. Each layer will be described below.

[0016] (water) Water is the main component of the stock solution, and in the aerosol container, some of the dimethyl ether dissolves to form a first layer (water-dimethyl ether layer). Dimethyl ether also dissolves in the hydrofluoroolefin, which will be described later, and forms a second layer (hydrofluoroolefin-dimethyl ether layer) that separates from the first layer.

[0017] When water is sprayed out of an aerosol container, it becomes a soft, slushy consistency due to the heat of vaporization of dimethyl ether. Subsequently, the water cools due to the vaporization of dimethyl ether in the hydrofluoroolefin-dimethyl ether layer, changing into a hard, sherbet-like consistency.

[0018] The water is not particularly limited. For example, the water may be purified water, ion-exchanged water, deep ocean water, alkaline ionized water, or the like.

[0019] The water content is preferably 5% by mass or more, more preferably 10% by mass or more in the aerosol composition. Also, the water content is preferably 50% by mass or less, more preferably 45% by mass or less in the aerosol composition. When the water content is within the above range, even when the content of dimethyl ether in the aerosol composition is low, the ejecta is likely to be in a sleet-like form and further likely to change into a sherbet-like form.

[0020] (Hydrofluoroolefin having a boiling point of 5 to 30 °C) The hydrofluoroolefin having a boiling point of 5 to 30 °C dissolves dimethyl ether in the aerosol container and forms a second layer (hydrofluoroolefin-dimethyl ether layer). As described above, the second layer separates from the first layer. When the hydrofluoroolefin having a boiling point of 5 to 30 °C is ejected from the aerosol container to the outside, it delays the vaporization of dimethyl ether, cools the soft sleet-like ejecta, and changes it into a hard sherbet-like form.

[0021] The hydrofluoroolefin having a boiling point of 5 to 30 °C is not particularly limited. For example, the hydrofluoroolefin having a boiling point of 5 to 30 °C may be trans-1-chloro-3,3,3-trifluoropropene (boiling point 19 °C), 1-chloro-2,3,3,3-tetrafluoropropene (boiling point 15 °C), or the like.

[0022] The content of the hydrofluoroolefin having a boiling point of 5 to 30°C is preferably 25% by mass or more, more preferably 30% by mass or more in the aerosol composition. Further, the content of the hydrofluoroolefin having a boiling point of 5 to 30°C is preferably 70% by mass or less, more preferably 65% by mass or less in the aerosol composition. When the content of the hydrofluoroolefin having a boiling point of 5 to 30°C is within the above range, the aerosol composition can dissolve a large amount of dimethyl ether in the hydrofluoroolefin having a boiling point of 5 to 30°C, and the ejecta is more likely to be frozen.

[0023] The mass ratio of water to the hydrofluoroolefin having a boiling point of 5 to 30°C (water / hydrofluoroolefin) is preferably 60 / 40 to 10 / 90, more preferably 55 / 45 to 15 / 85. When the mass ratio of water to the hydrofluoroolefin having a boiling point of 5 to 30°C is within the above range, dimethyl ether in the aerosol composition is likely to dissolve in each of water and the hydrofluoroolefin. As a result, the aerosol composition separates into two layers and is likely to be dispersed for at least 2 seconds by shaking the container. The ejecta is cooled to a soft sleet state and then frozen to change into a hard sherbet state, so the cooling effect is likely to persist.

[0024] (dimethyl ether) Dimethyl ether dissolves in both water and the hydrofluoroolefin in the aerosol container. As a result, a first layer (water-dimethyl ether layer) and a second layer (hydrofluoroolefin-dimethyl ether layer) are formed. When dimethyl ether is ejected to the outside, it freezes the ejecta due to the heat of vaporization.

[0025] The dimethyl ether content in the aerosol composition is 10% by mass or more, preferably 15% by mass or more. Furthermore, the dimethyl ether content is 40% by mass or less, preferably 38% by mass or less. If the dimethyl ether content is less than 10% by mass, the aerosol composition becomes less prone to freezing of the sprayed material. On the other hand, if the dimethyl ether content exceeds 40% by mass, the aerosol composition separates quickly even when the container is shaken to disperse, making it difficult to spray with a uniform composition.

[0026] (optional ingredient) Water may contain active ingredients, alcohols, water-soluble polymers, surfactants, oily components, etc., as appropriate. In this case, water containing active ingredients, etc., may be treated as an aqueous concentrate.

[0027] Active ingredients are used for purposes such as adding an effect to a target object.

[0028] The active ingredients are not particularly limited. The active ingredients can be appropriately selected depending on the use and purpose. For example, the active ingredients may include: cooling agents such as 1-menthol and camphor; antiperspirants such as chlorohydroxyaluminum, isopropylmethylphenol, and zinc paraphenolsulfonate; astringents such as zinc oxide, allantoin hydroxyaluminum, and citric acid; anti-inflammatory agents such as allantoin, glycyrrhetinic acid, dipotassium glycyrrhizate, and azulene; antipruritic agents such as crotamiton and d-camphor; anti-inflammatory and analgesic agents such as methyl salicylate, indomethacin, piroxicam, felbinac, and ketoprofen; and antifungal agents such as oxiconazole, clotrimazole, sulconazole, bifonazole, miconazole, isoconazole, econazole, thioconazole, butenafine, and their hydrochlorides, nitrates, and acetates. Local anesthetics such as dibucaine hydrochloride, tetracaine hydrochloride, lidocaine, lidocaine hydrochloride; antihistamines such as diphenhydramine, diphenhydramine hydrochloride, chlorpheniramine maleate; disinfectants such as parahydroxybenzoic acid esters, sodium benzoate, phenoxyethanol, benzalkonium chloride, benzethonium chloride, chlorhexidine chloride; moisturizers such as collagen, xylitol, sorbitol, hyaluronic acid, carotenoid acid, sodium lactate, dl-pyrrolidone carboxylate, keratin, lecithin, urea; deodorants such as methacrylate lauryl acid, methyl benzoate, methyl phenylacetate, geranyl chloride, acetophenone myristate, benzyl acetate, benzyl propionate; N,Insect repellents such as N-diethyl-m-toluamide (DEET) and diethyl caprylate, UV absorbers such as diethylaminohydroxybenzoyl hexyl benzoate, 2-ethylhexyl paramethoxycinnamate, ethylhexyl triazone, oxybenzone, hydroxybenzophenone sulfonic acid, sodium dihydroxybenzophenone sulfonate, and dihydroxybenzophenone, UV scattering agents such as zinc oxide and titanium dioxide, retinol, retinyl acetate, retinyl palmitate, calcium pantothenate, ascorbic acid, and ascorbic acid. These include vitamins such as sodium, dl-α-tocopherol, tocopherol acetate, tocopherol, and mixtures thereof; antioxidants such as ascorbic acid, α-tocopherol, and dibutylhydroxytoluene; essential oils such as peppermint oil, orange oil, and eucalyptus oil; extracts such as peony extract, loofah extract, rose extract, lemon extract, aloe extract, calamus root extract, eucalyptus extract, sage extract, tea extract, seaweed extract, placenta extract, and silk extract; whitening agents such as arbutin and kojic acid; and various fragrances such as natural and synthetic fragrances.

[0029] When an active ingredient is included, the amount of the active ingredient is not particularly limited. For example, the amount of the active ingredient is preferably 0.01% by mass or more, and more preferably 0.05% by mass or more, in the aqueous stock solution. Furthermore, the amount of the active ingredient is preferably 10% by mass or less, and more preferably 8% by mass or less, in the aqueous stock solution. By having the amount of the active ingredient within the above range, the aerosol composition can easily impart the effect of the active ingredient to the target object.

[0030] Alcohols are used for purposes such as adjusting the freezing state of the spray or as a solvent for active ingredients that are insoluble in water.

[0031] The types of alcohols are not particularly limited. For example, alcohols include monohydric alcohols such as ethanol and isopropanol, dihydric alcohols such as 1,3-butylene glycol and propylene glycol, and trihydric alcohols such as glycerin.

[0032] When alcohols are included, the amount of alcohol is not particularly limited. For example, the amount of alcohol is preferably 0.1% by mass or more, and more preferably 0.3% by mass or more, in the aqueous stock solution. Furthermore, the amount of alcohol is preferably 20% by mass or less, and more preferably 15% by mass or less, in the aqueous stock solution. By having the amount of alcohol within the above range, the aerosol composition makes it easier to control the freezing state of the sprayed material.

[0033] Water-soluble polymers are used for purposes such as slowing down separation after shaking to facilitate spraying with a uniform composition, and adjusting the freezing state of the sprayed material.

[0034] Water-soluble polymers are not particularly limited. For example, water-soluble polymers include cellulosic polymers such as cellulose nanofibers, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, and sodium carboxymethylcellulose; gums such as xanthan gum, carrageenan, gum arabic, tragacanth gum, cationized guar gum, guar gum, and gellan gum; and dextran, sodium carboxymethyldextran, dextrin, pectin, sodium alginate, sodium hyaluronate, and polyvinyl alcohol.

[0035] When a water-soluble polymer is included, 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, and more preferably 0.03% by mass or more, in the aqueous stock solution. Furthermore, the content of the water-soluble polymer is preferably 3% by mass or less, and more preferably 2% by mass or less, in the aqueous stock solution. By having the content of the water-soluble polymer within the above range, the aerosol composition makes it easier to control the freezing state of the sprayed material.

[0036] Surfactants are used for purposes such as solubilizing oily components or active ingredients that do not dissolve in water into aqueous solutions.

[0037] The surfactant is not particularly limited. For example, surfactants include polyoxyethylene polyoxypropylene alkyl ethers such as POE·POP cetyl ether and POE·POP decyltetradecyl ether, polyoxyethylene sorbitan fatty acid esters such as POE sorbitan monolaurate, POE sorbitan monostearate, and POE sorbitan monooleate, polyoxyethylene alkyl ethers such as POE cetyl ether, POE stearyl ether, POE oleyl ether, POE lauryl ether, POE behenyl ether, POE octyldodecyl ether, POE isocetyl ether, and POE isostearyl ether, polyoxyethylene glycerin fatty acid esters such as POE glyceryl monostearate, polyoxyethylene hydrogenated castor oil such as POE hydrogenated castor oil, polyethylene glycol fatty acid esters such as polyethylene glycol monostearate, hexaglyceryl monolaurate, hexaglyceryl monomyristate, pentaglyceryl monolaurate, and pentaglyceryl monomyristate. Nonionic surfactants such as polyglycerin fatty acid esters including glyceryl, pentaglyceryl monooleate, pentaglyceryl monostearate, decaglyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, decaglyceryl monoisostearate, decaglyceryl monooleate, decaglyceryl monolinoleate, polyoxyethylene glycerin fatty acid esters such as POE glyceryl monooleate, polyoxyethylene sorbitan fatty acid esters such as POE sorbitan monolaurate, POE sorbitan tetrastearate, POE sorbitan tetraoleate, fatty acid alkanolamides such as coconut oil fatty acid diethanolamide, coconut oil fatty acid monoethanolamide, lauric acid diethanolamide, lauric acid monoisopropanolamide, sorbitan fatty acid esters such as sorbitan monolaurate and sorbitan monostearate, and monoglycerin fatty acid esters such as glyceryl monomyristate and glyceryl monostearate;These include anionic surfactants such as fatty acids like myristic acid and stearic acid, saponified alkalis like triethanolamine and potassium, alkyl phosphates such as potassium lauryl phosphate and sodium lauryl phosphate, polyoxyethylene alkyl ether phosphates, alkyl sulfates, polyoxyethylene alkyl ether sulfates, alkyl ether carboxylates, and sulfonates; amino acid-type anionic surfactants such as N-acyl glutamate, N-acyl glycine salts, N-acyl alanine salts, and acyl alanine salts; silicone-based surfactants such as polyoxyethylene-methylpolysiloxane copolymers, polyoxypropylene-methylpolysiloxane copolymers, and poly(oxyethylene-oxypropylene)-methylpolysiloxane copolymers; and amphoteric surfactants such as lauryldimethylaminoacetic acid betaine (lauryl betaine), stearyl betaine, and coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine (cocamidopropyl betaine).

[0038] When a surfactant is included, the surfactant content is not particularly limited. For example, the surfactant content is preferably 0.05% by mass or more, and more preferably 0.1% by mass or more, in the aqueous stock solution. Furthermore, the surfactant content is preferably 10% by mass or less, and more preferably 8% by mass or less, in the aqueous stock solution. By having the surfactant content within the above range, the aerosol composition makes it easier to solubilize oil-soluble active ingredients and oily components in the aqueous stock solution and to apply them to the target object in a uniform composition.

[0039] Oily components are used as solvents for active ingredients that do not dissolve in water, or to impart effects such as slipperiness, gloss, and moisturizing properties to the object.

[0040] The oily components are not particularly limited. For example, oily components include silicone oils such as dimethicone, methylpolysiloxane, cyclopentasiloxane, cyclohexasiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, methylcyclopolysiloxane, tetrahydrotetramethylcyclotetrasiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, methylhydrogenpolysiloxane, and methylphenylpolysiloxane. Dodecane, isododecane, tetradecane, hexadecane, octadecane, liquid paraffin, isoparaffin, hydrocarbon oils such as squalane and squalene, methylpentanediol dieopentanoate, diethylpentanediol dieopentanoate, neopentyl glycol di-2-ethylhexanoate, neopentyl glycol dicaprate, propylene glycol dilaurate, ethylene glycol distearate, diethylene glycol dilaurate, diethylene glycol distearate These include ester oils such as diethylene glycol diisostearate, diethylene glycol dioleate, triethylene glycol dilaurate, triethylene glycol distearate, triethylene glycol diisostearate, triethylene glycol dioleate, propylene glycol monostearate, propylene glycol monooleate, ethylene glycol monostearate, glyceryl tri-2-ethylhexanoate, caprylic / capric triglyceride, isononyl isononanoate, isotridecyl isononanoate, diethoxyethyl succinate, diisostearyl malate, isopropyl myristate, isopropyl palmitate, cetyl isooctanoate, octyl hydroxystearate, and ethylhexyl hydroxystearate; oils and fats such as olive oil, camellia oil, corn oil, castor oil, safflower oil, jojoba oil, and coconut oil; fatty acids such as isostearic acid and oleic acid; and higher alcohols such as oleyl alcohol and isostearyl alcohol.

[0041] When an oily component is included, the amount of the oily component is not particularly limited. For example, the amount of the oily component is preferably 0.1% by mass or more, and more preferably 0.2% by mass or more, in the aqueous stock solution. Furthermore, the amount of the oily component is preferably 10% by mass or less, and more preferably 8% by mass or less, in the aqueous stock solution. By having the amount of the oily component within the above range, the aerosol composition can easily impart the effect of the oily component to the target object.

[0042] The method for preparing the aqueous stock solution is not particularly limited. For example, the aqueous stock solution can be prepared by dissolving the active ingredient in water or by emulsifying the active ingredient using a surfactant.

[0043] The content of the aqueous concentrate is not particularly limited. For example, the content of the aqueous concentrate is preferably 5% by mass or more, and more preferably 10% by mass or more, in the aerosol composition. Furthermore, the content of the aqueous concentrate is preferably 50% by mass or less, and more preferably 45% by mass or less, in the aerosol composition. When the content of the aqueous concentrate is within the above range, the aerosol composition is prone to freezing of the sprayed material.

[0044] The method for preparing the aerosol composition of this embodiment is not particularly limited. For example, the aerosol composition can be prepared by filling a pressure vessel with water (aqueous concentrate) and attaching an aerosol valve to the opening of the pressure vessel to form an aerosol container. Next, hydrofluoroolefin is filled from the aerosol valve and separated from the water (aqueous concentrate). Furthermore, dimethyl ether is filled from the aerosol valve, and the dimethyl ether is dissolved in the water (aqueous concentrate) and the hydrofluoroolefin, respectively, to form a first layer (water-dimethyl ether layer) and a second layer (hydrofluoroolefin-dimethyl ether layer).

[0045] The aerosol composition of this embodiment may contain other liquefied gases (with a boiling point of less than 5°C) besides dimethyl ether for purposes such as adjusting the pressure to facilitate adhesion to the target object.

[0046] Other liquefied gases are not particularly limited. For example, other liquefied gases include liquefied petroleum gas, which is propane (boiling point -42.1°C), n-butane (boiling point -0.5°C), isobutane (boiling point -11.7°C) and mixtures thereof, hydrofluoroolefins such as trans-1,3,3,3-tetrafluoropropene (boiling point -19°C), and mixtures thereof.

[0047] When other liquefied gases are blended, the content of these other liquefied gases is not particularly limited. For example, the content of other liquefied gases in the aerosol composition is preferably 3% by mass or more, and preferably 5% by mass or more. Furthermore, the content of other liquefied gases is preferably 15% by mass or less, and preferably 10% by mass or less. When the content of other liquefied gases is within the above range, the aerosol composition is more likely to have the effect of adjusting the pressure and making it easier to adhere to the target object.

[0048] Furthermore, the aerosol composition of this embodiment may contain compressed gas for purposes such as dissolving in dimethyl ether or hydrofluoroolefin having a boiling point of 5 to 30°C, and promoting their vaporization when sprayed, thereby facilitating freezing.

[0049] The compressed gas is not particularly limited. Examples include carbon dioxide, nitrous oxide, nitrogen, compressed air, and mixtures thereof.

[0050] When compressed gas is incorporated, the amount of compressed gas is not particularly limited. For example, the amount of compressed gas is preferably such that the pressure of the aerosol composition at 25°C is 0.25 MPa or higher, and more preferably 0.3 MPa or higher. Furthermore, the amount of compressed gas is preferably such that the pressure of the aerosol composition at 25°C is 0.5 MPa or lower, and more preferably 0.45 MPa or lower. By having a compressed gas content within the above range, the aerosol composition is more likely to exhibit the effects of the compressed gas.

[0051] As described above, according to the aerosol composition of this embodiment, dimethyl ether dissolves in both water and hydrofluoroolefin. As a result, it separates into two layers: a first layer (water + dimethyl ether) and a second layer (hydrofluoroolefin + dimethyl ether). The first and second layers can be dispersed for at least 2 seconds, preferably at least 3 seconds, by shaking the container. As a result, by shaking before use, the aerosol composition can be sprayed with a stable composition. Since such an aerosol composition does not require emulsification of the stock solution and liquefied gas, the preparation effort is reduced. Furthermore, dimethyl ether has different solubility in water and hydrofluoroolefin, respectively. Therefore, the dimethyl ether dissolved in the first and second layers vaporizes at different times. As a result, the resulting spray changes from a soft slushy state to a hard sherbet-like state, making it easier to sustain the cooling effect. [Examples]

[0052] The present invention will be described more specifically below with reference to examples. The present invention is not limited in any way to these examples. Unless otherwise specified, "%" means "mass%" and "parts" means "parts by mass".

[0053] <Example 1> A transparent glass pressure vessel was filled with 19 g (38% by mass) of purified water, fitted with a valve and sealed, and then filled with 19 g (38% by mass) of trans-1-chloro-3,3,3-trifluoropropene through the valve. Furthermore, 12 g (24% by mass) of dimethyl ether was filled through the valve, and an aerosol product was prepared by filling it with the aerosol composition.

[0054] <Example 2> As shown in Table 1, aerosol compositions and aerosol products were prepared in the same manner as in Example 1, except that 14.5 g (29% by mass) of purified water, 21.5 g (43% by mass) of trans-1-chloro-3,3,3-trifluoropropene, and 14 g (28% by mass) of dimethyl ether were added.

[0055] <Example 3> As shown in Table 1, aerosol compositions and aerosol products were prepared in the same manner as in Example 1, except that 10.5 g (21% by mass) of purified water, 25 g (50% by mass) of trans-1-chloro-3,3,3-trifluoropropene, and 14.5 g (29% by mass) of dimethyl ether were added.

[0056] <Example 4> As shown in Table 1, aerosol compositions and aerosol products were prepared in the same manner as in Example 1, except that 7 g (14% by mass) of purified water, 27.5 g (55% by mass) of trans-1-chloro-3,3,3-trifluoropropene, and 15.5 g (31% by mass) of dimethyl ether were added.

[0057] <Comparative Example 1> As shown in Table 1, an aerosol composition and aerosol product were prepared in the same manner as in Example 1, except that 35 g (70% by mass) of purified water and 15 g (30% by mass) of dimethyl ether were added, and trans-1-chloro-3,3,3-trifluoropropene was not added.

[0058] <Comparative Example 2> As shown in Table 1 (unit: mass%), an aerosol composition and aerosol product were prepared in the same manner as in Example 1, except that 35 g (70% by mass) of trans-1-chloro-3,3,3-trifluoropropene and 15 g (30% by mass) of dimethyl ether were filled, and purified water was not filled.

[0059] [Table 1]

[0060] *1: Trans-1-chloro-3,3,3-trifluoropropene (boiling point 19°C) Product name: Solstice 1233zd(E), manufactured by Honeywell *2: Dimethyl ether

[0061] The aerosol compositions and aerosol products of Examples 1-4 and Comparative Examples 1-2 were evaluated for their appearance, dispersion, spray state, and cooling power using the following methods. The results are shown in Table 2 and Figure 1.

[0062] 1. Appearance of the aerosol composition The pressure vessel was immersed in a constant temperature water bath at 25°C for 30 minutes, and the appearance of the aerosol composition was visually observed and evaluated according to the following evaluation criteria. (Evaluation Criteria) ○: The aerosol composition separated into two layers, upper and lower. ×: The aerosol composition did not separate and was a single layer.

[0063] 2. Distributed state The pressure-resistant container was held and shaken three times up and down with an amplitude of 20 cm to mix the aerosol composition. After that, it was left to stand, and the dispersion state was observed visually. (Evaluation Criteria) ◎: The aerosol composition dispersed uniformly for more than 5 seconds, and then separated into two layers. ○: The aerosol composition dispersed uniformly for 3-5 seconds, and then separated into two layers. △: The aerosol composition dispersed uniformly for 2 to 3 seconds, and then separated into two layers. ×1: The aerosol composition remained as a single layer without separation. ×2: The aerosol composition separated into two layers after a time of less than 2 seconds of uniform dispersion.

[0064] 3. Spray pattern and cooling power A spray button with a φ1.2 nozzle was attached to the stem of an aerosol valve, and 1g of the spray was dispensed onto a Kimtowel from a distance of 10cm. The state of the spray was observed and evaluated according to the following evaluation criteria. The temperature of the spray was also measured using a thermocouple at predetermined intervals. (Evaluation Criteria) ○: The ejected material changed from a soft, slushy consistency to a firm, sherbet-like consistency. ×1: The spray was in mist form and did not freeze. ×2: The sprayed material froze in some areas, but unevenly.

[0065] [Table 2]

[0066] As shown in Table 2 and Figure 1, aerosol products filled with the aerosol compositions of Examples 1 to 4 of the present invention did not require emulsification of water and dimethyl ether, and could be uniformly dispersed for more than 5 seconds by shaking the container before spraying. Furthermore, the sprayed material cooled and changed from a soft slushy state to a hard sherbet-like state, and the cooling effect was sustained.

[0067] On the other hand, the aerosol products filled with the aerosol compositions of Comparative Examples 1 and 2 were single-layered, the sprayed material was in a mist form and did not freeze, and the cooling effect did not last.

[0068] <Examples 5-11> As shown in Table 3 (unit: mass%), aerosol compositions and aerosol products were prepared in the same manner as in Example 1, except that the content of each raw material was changed.

[0069] For the aerosol compositions and aerosol products of Examples 5 to 11, the appearance, dispersion state, spray state, and cooling power of the aerosol compositions were evaluated using the same method as described above. The results are shown in Table 4.

[0070] [Table 3]

[0071] [Table 4]

[0072] As shown in Table 4, aerosol products filled with the aerosol compositions of Examples 5 to 11 of the present invention did not require emulsification of water and dimethyl ether, and could be uniformly dispersed for more than 3 seconds by shaking the container before spraying. Furthermore, the sprayed material cooled and changed from a soft slushy state to a hard sherbet-like state, and the cooling effect was sustained.

[0073] <Examples 12-18> As shown in Table 5 (unit: mass%), aerosol compositions and aerosol products were prepared in the same manner as in Example 1, except that the content of each raw material was changed.

[0074] For the aerosol compositions and aerosol products of Examples 12 to 18, the appearance, dispersion state, spray state, and cooling power of the aerosol compositions were evaluated using the same method as described above. The results are shown in Table 6.

[0075] [Table 5]

[0076] [Table 6]

[0077] As shown in Table 6, aerosol products filled with the aerosol compositions of Examples 12-18 of the present invention did not require emulsification of water and dimethyl ether, and could be uniformly dispersed for more than 2 seconds by shaking the container before spraying. Furthermore, the sprayed material cooled and changed from a soft slushy state to a hard sherbet-like state, and the cooling effect was sustained.

[0078] <Comparative Examples 3-6> As shown in Table 7 (unit: mass%), aerosol compositions and aerosol products were prepared in the same manner as in Example 1, except that the content of each raw material was changed.

[0079] The aerosol compositions and aerosol products of Comparative Examples 3 to 6 were evaluated for their appearance, dispersion state, spray state, and cooling power using the same method as described above. The results are shown in Table 8.

[0080] [Table 7]

[0081] [Table 8]

[0082] As shown in Table 8, the aerosol products filled with the aerosol compositions of Comparative Examples 3-6 separated into two layers within 2 seconds even when the container was shaken before spraying, and could not be sprayed with a uniform composition. The sprayed material of Comparative Examples 3-4 was misty and did not freeze due to the low dimethyl ether content, while the sprayed material of Comparative Examples 5-6 was non-uniform, although some parts froze due to the high dimethyl ether content.

[0083] Product Example 1: Cooling Aerosol Products A cooling aerosol product was manufactured by filling a transparent glass pressure-resistant container with the following aerosol composition 1. <Aerosol composition 1> Purified water 29.16 Hydroxyethylcellulose 0.06 Menthol 0.15 Methylparaben 0.03 HFO-1233zd(E)(*1) 44.10 Dimethyl ether 26.50 Total 100.00 (mass%)

[0084] When the pressure-resistant container was left standing still, aerosol composition 1 was separated into two layers, upper and lower. However, when the pressure-resistant container was shaken up and down three times with an amplitude of 20 cm, it dispersed uniformly for more than 5 seconds, and then separated into two layers again. When the aerosol composition was sprayed onto cotton while uniformly dispersed, the sprayed material changed from a soft slushy consistency to a hard sherbet-like consistency. When the cotton was pressed against the back of the neck, it felt very cold and provided a cooling effect.

[0085] Product Example 2: Aerosol product for relieving itching An anti-itch aerosol product was manufactured by filling a transparent glass pressure-resistant container with the following aerosol composition 2. <Aerosol Composition 2> Purified water 24.0 Ethanol 2.0 Lidocaine 2.0 Diphenhydramine 1.0 HFO-1233zd(E)(*1) 43.0 Dimethyl ether 28.0 Total 100.0 (mass%)

[0086] When the pressure-resistant container was left standing, the aerosol composition 2 was separated into two layers, upper and lower. However, when the pressure-resistant container was shaken up and down three times with an amplitude of 20 cm, it dispersed uniformly for more than 5 seconds, and then separated into two layers again. When the aerosol composition was sprayed onto cotton while uniformly dispersed, the sprayed material changed from a soft, slushy consistency to a firm, sherbet-like consistency. When the cotton was pressed against an insect bite, it felt very cold and relieved the itching.

[0087] Product Example 3: Antiperspirant Aerosol Product An antiperspirant aerosol product was manufactured by filling a transparent glass pressure-resistant container with the following aerosol composition 3. <Aerosol composition 3> Purified water 20.0 Ethanol 3.0 Isopropylmethylphenol 0.1 Zinc paraphenolsulfonate 2.0 HFO-1233zd(E)(*1) 50.0 Dimethyl ether 24.9 Total 100.0 (mass%)

[0088] When the pressure-resistant container was left standing, the aerosol composition 3 was separated into two layers, upper and lower. However, when the pressure-resistant container was shaken up and down three times with an amplitude of 20 cm, it dispersed uniformly for more than 5 seconds, and then separated into two layers again. When the aerosol composition was sprayed onto cotton while uniformly dispersed, the sprayed material changed from a soft slushy consistency to a hard sherbet-like consistency, and when the cotton was placed on the back of the neck, it felt very cold.

[0089] Product Example 4: Aerosol Products for Cooling Pests An aerosol product for cooling pests was manufactured by filling a transparent glass pressure-resistant container with the following aerosol composition 4. <Aerosol composition 4> Purified water 29.2 Peppermint oil 0.3 HFO-1233zd(E)(*1) 44.0 Dimethyl ether 26.5 Total 100.0 (mass%)

[0090] When the pressure-resistant container was left standing, the aerosol composition 4 was separated into two layers, upper and lower. However, when the pressure-resistant container was shaken up and down three times with an amplitude of 20 cm, it dispersed uniformly for more than 5 seconds, and then separated into two layers again. When the aerosol composition was sprayed on a cockroach while it was uniformly dispersed, the sprayed substance changed from a soft, slushy consistency to a hard, sherbet-like consistency, and the cockroach's movements became sluggish.

Claims

1. An aerosol composition comprising water, a hydrofluoroolefin having a boiling point of 5 to 30°C, and dimethyl ether, wherein the dimethyl ether content is 10 to 40% by mass, and the composition is separated into two layers.

2. The water content is 5 to 50% by mass. The aerosol composition according to claim 1, wherein the content of the hydrofluoroolefin having a boiling point of 5 to 30°C is 25 to 70% by mass.

3. The aerosol composition according to claim 1 or 2, wherein the mass ratio of water to the hydrofluoroolefin having a boiling point of 5 to 30°C is 60 / 40 to 10 / 90.

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