JP2008230982A - Foamable aerosol composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foamable aerosol composition ejectable in a foam state, gradually foaming when the foam is extended by being applied with a finger or the like, leaving a small amount of the composition in a passageway of an ejecting member because of being ejected in the foam state, and preventing after draw. <P>SOLUTION: The foamable aerosol composition contains 70-98 wt.% aqueous stock solution containing a surfactant, 0.5-20 wt.% hydrofluoroether having 50-80°C boiling point, and 0.5-10 wt.% aliphatic hydrocarbon having a boiling point of -50°C to 5°C. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a foamable aerosol composition. Specifically, it can be discharged in the form of foam, and when the foam is spread with a finger or the like, the foam gradually rises, and since it is discharged in the form of foam, the amount remaining in the passage of the discharge member is small, and the after-draw The present invention relates to a foamable aerosol composition capable of suppressing the above.

  Conventionally, various foamable aerosol compositions comprising an aqueous stock solution and a liquefied gas have been developed as aerosol compositions for shaving foams and the like. As these foamable aerosol compositions, after-foamable aerosol compositions that are discharged in a gel state and gradually foam when the gel is spread with a finger are known.

  The post-foaming aerosol composition is composed of, for example, a gelling agent, a surfactant, water, a post-foaming agent, an active ingredient, and alcohols, and maintains a gel state at room temperature and atmospheric pressure for at least 30 seconds, and shear stress. There is known a post-foaming gel composition that foams when added, and defoams in a short time when a shear stress is continuously applied (see, for example, Patent Document 1). As the post-foaming agent, a composition comprising 80% by weight or more of a component selected from isopentane and normal pentane and 20% by weight or less of a component selected from isobutane, normal butane, propane and dimethyl ether is disclosed.

  Further, a post-foaming aerosol composition containing water, soap, a post-foaming agent and a specific higher alcohol is known (see, for example, Patent Document 2). The post-foaming aerosol composition is discharged from an aerosol container in the form of a gel substance, and then gradually foams to form a foam. As the post-foaming agent, a low boiling point organic liquid having a boiling point of −0.5 to 36.5 ° C. is disclosed, and specifically, normal pentane, isopentane, and normal butane are disclosed.

  However, as the post-foaming agent used in the post-foaming aerosol composition of Patent Documents 1 and 2, aliphatic hydrocarbons and dimethyl ether having 3 to 5 carbon atoms are disclosed. In the examples, isopentane is used. , N-pentane, or a mixture of isopentane and n-butane based on isopentane is used. Since the boiling point of the aliphatic hydrocarbon having 5 carbon atoms is about 28 to 36 ° C., the post-foaming agent used in the examples is dispersed in the gel in a liquid state immediately after discharge, The ejected gel is sheared with a finger or vaporized by heat from the skin to foam. Therefore, although there is a merit that it is easy to spread on the skin as compared with a general gel, there is a problem that most of the above-mentioned aliphatic hydrocarbons are vaporized on the skin and thus are highly irritating. Furthermore, since the gel is discharged, the gel tends to remain in the passage of the discharge member that discharges the aerosol composition, and there is a problem in that the remaining gel is foamed later and the discharge member is contaminated. .

  In addition, an aerosol composition is known in which an aqueous stock solution containing an anionic surfactant and a liquefied gas are emulsified at a specific ratio (see, for example, Patent Document 3). The aerosol composition uses an aqueous stock solution containing an anionic surfactant such as a saponified fatty acid, and is discharged in the form of foam, and the foam shape changes (increases) over time. is there. Further, as liquefied gas, propane, normal butane, isobutane and mixtures thereof, liquefied petroleum gas, dimethyl ether and chlorofluorocarbons are disclosed, and the vapor pressure at 20 ° C. is 0.1 to 0.5 MPa. It is disclosed that it is preferable.

  However, in the aerosol composition of Patent Document 3, the weight ratio of the aqueous stock solution to the liquefied gas is 10/90 to 60/40, and the ratio of the liquefied gas is high, so the specific gravity of the foam is 0.001 to 0.005 g. / Ml was very light, and there was a problem that it was difficult to spread on the skin and hair.

  Therefore, it can be discharged in the form of foam, and when the foam is spread with a finger or the like, the foam gradually rises, and since it is discharged in the form of foam, the amount remaining in the passage of the discharge member is small, and afterdraw can be suppressed, and At present, there is still no effervescent aerosol composition with almost no skin irritation.

JP-A-3-31389 JP 7-163861 A JP 2003-81763 A

  The present invention can be discharged in the form of foam, and when foam is applied with a finger or the like, the foam gradually rises, and since it is discharged in the form of foam, the amount remaining in the passage of the discharge member is small, and afterdraw can be suppressed. An object of the present invention is to provide a foamable aerosol composition that hardly causes irritation to the skin.

  That is, the present invention relates to an aqueous stock solution containing a surfactant of 70 to 98% by weight, a hydrofluoroether having a boiling point of 50 to 80 ° C., 0.5 to 20% by weight, and a fat having a boiling point of −50 to 5 ° C. The present invention relates to a foamable aerosol composition containing 0.5 to 10% by weight of a group hydrocarbon.

  It is preferable that the compounding amount of the surfactant is 0.1 to 20% by weight in the aqueous stock solution.

  It is preferable that the vapor pressure of the aliphatic hydrocarbon at 20 ° C. is 0.4 to 0.7 MPa.

  The blending ratio of hydrofluoroether and aliphatic hydrocarbon is preferably 30/70 to 90/10 (weight ratio).

  The foamable aerosol composition of the present invention comprises an aqueous stock solution containing a surfactant, a hydrofluoroether having a boiling point of 50 to 80 ° C., and an aliphatic hydrocarbon having a boiling point of −50 to 5 ° C. in a specific ratio. By containing, it can be discharged in the form of foam, and when foam is spread with fingers etc., it will gradually foam, so it is easy to spread, and since it is discharged in the form of foam, the amount remaining in the passage of the discharge member is small, It is possible to suppress afterdraw. Also, there is almost no irritation to the skin.

  The foamable aerosol composition of the present invention has an aqueous stock solution containing a surfactant of 70 to 98% by weight, a hydrofluoroether having a boiling point of 50 to 80 ° C, 0.5 to 20% by weight, and a boiling point of -50 to 5 ° C. By containing 0.5 to 10% by weight of the aliphatic hydrocarbon, it can be discharged in the form of a foam. Since it is discharged, the amount remaining in the passage of the discharge member is small, afterdraw can be suppressed, and there is almost no irritation to the skin.

(A) Aqueous stock solution The aqueous stock solution is emulsified with a hydrofluoroether and an aliphatic hydrocarbon, which will be described later, inside the aerosol container, and when discharged into the atmosphere, foams due to the vaporization of the aliphatic hydrocarbon or the hydrofluoroether. Thus, bubbles are formed and become a liquid film portion of the bubbles.

  The compounding quantity of an aqueous | water-based stock solution is 70 to 98 weight% in an aerosol composition, and it is preferable that it is 75 to 95 weight%. If the aqueous stock solution is less than 70% by weight, the foam density tends to be too small and difficult to use. If it is more than 98% by weight, foaming is insufficient and the liquid density becomes too large, particularly at low temperatures. There is a tendency to become liquid without foaming.

  The aqueous stock solution contains a surfactant in order to emulsify the hydrofluoroether and the aliphatic hydrocarbon.

  Examples of the surfactant include sucrose fatty acid esters such as sucrose stearic acid ester, sucrose myristic acid ester, and sucrose lauric acid ester, alkylpolyglucosides such as lauryl glucoside and decyl glucoside, sorbitan fatty acid ester, and monoglycerin. Fatty acid ester, polyglycerin fatty acid ester such as di, tri, tetra, penta, hexa, deca, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene poly Oxypropylene alkyl ether, polyoxyethylene castor oil / hardened castor oil, polyoxyethylene lanolin alcohol, polyoxyethylene alkylamine Fatty acid alkylolamides such as polyoxyethylene fatty acid amide and coconut oil fatty acid diethanolamide, polyoxyethylene / methylpolysiloxane copolymer, polyoxypropylene / methylpolysiloxane copolymer, poly (oxyethylene / oxypropylene) / methyl Nonionic surfactants such as polysiloxane copolymers and fatty acids having 10 to 20 carbon atoms such as capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, -Fatty acid soap saponified with an alkaline agent such as methyl-1-propanol, triethanolamine, diethanolamine, diisopropanolamine, sodium hydroxide, potassium hydroxide, N-coconut oil fatty acid acyl-L-glutamic acid triethanolamine, N -Palm oil Acyl fatty acid-potassium L-glutamate, N-coconut oil fatty acid acyl-sodium L-glutamate, N-lauroyl-L-glutamate triethanolamine, N-lauroyl-L-potassium glutamate, N-lauroyl-L-glutamate sodium, N-acyl glutamates such as N-myristoyl-L-glutamate potassium, N-myristoyl-L-sodium glutamate, N-stearoyl-L-glutamate sodium; N-coconut oil fatty acid acylglycine potassium, N-coconut oil fatty acid acylglycine N-acylglycine salts such as sodium; N-acylalanine salts such as N-coconut oil fatty acid acyl-DL-alanine triethanolamine; amino acid soaps such as high molecular milk such as acrylic acid / alkyl methacrylate copolymers And the like (including those neutralized with the alkali agent), and the like. These can be used alone or in admixture of two or more. Among these, sucrose fatty acid ester, alkyl polyglucoside, fatty acid alkylolamide, fatty acid soap, and acrylic acid / methacrylic acid alkyl copolymer are preferable from the viewpoint of excellent emulsification stability with hydrofluoroether.

  The amount of the surfactant is preferably 0.1 to 20% by weight in the aqueous stock solution, more preferably 0.1 to 15% by weight, and 0.5 to 10% by weight. More preferred is 1 to 10% by weight. If the blending amount of the surfactant is less than 0.1% by weight, the emulsifying power and foaming power tend to be weak, and it is difficult to form a stable foam at the time of ejection. There is a tendency for the feeling of use to decrease, for example, it becomes stronger and the drying property becomes worse.

  The aqueous stock solution can be prepared by appropriately selecting an active ingredient, alcohols, water-soluble polymer, oily component, powder and the like together with the surfactant according to the use and purpose, and blending in water. .

  The said active ingredient is used in order to provide the effect according to a use, a purpose, etc. Examples of the active ingredient include amino acids such as arginine, glycine, alanine, serine, and glutamine; retinol, retinol acetate, retinol palmitate, calcium pantothenate, ascorbic acid, sodium ascorbate, dl-α-tocopherol, tocopherol acetate, And vitamins such as mixtures thereof; refreshing agents such as l-menthol and camphor; astringents such as zinc oxide, allantoin hydroxyaluminum, tannic acid, citric acid and lactic acid; whitening agents such as arbutin and kojic acid; diethylaminohydroxybenzoyl benzoate Acid hexyl, paramethoxycinnamate 2-ethylhexyl, ethylhexyltriazone, oxybenzone, hydroxybenzophenonesulfonic acid, dihydroxybenzophenonesulfonic acid sodium UV absorbers such as zinc and dihydroxybenzophenone; UV scattering agents such as zinc oxide, titanium oxide and octyltrimethoxysilane-coated titanium oxide; polyvinylpyrrolidone, vinyl acetate / vinylpyrrolidone copolymer, polyvinylcaprolactam, N-vinylpyrrolidone / methacrylic Nonionic polymers such as amide / N-vinylimidazole copolymer, vinyl pyrrolidone / N, N-dimethylaminoethyl methacrylate copolymer diethyl sulfate (polyquaternium 11), methyl vinyl imidazolium chloride / vinyl pyrrolidone copolymer, Styling components such as methyl vinyl imidazolium / vinyl pyrrolidone copolymer and other cationic polymers such as methyl sulfate; methyl salicylate, camphor, diphenhydramine, indomethacin, pyroxy Anti-inflammatory analgesics such as cam, felbinac, ketoprofen, crotamiton; anti-inflammatory agents such as allantoin, glycyrrhetinic acid, azulene; local anesthetics such as dibucaine hydrochloride, tetracaine hydrochloride, lidocaine hydrochloride; diphenhydramine hydrochloride, chlorfemiramin maleate, etc. Antihistamines; fragrances such as floral, green, citrus green, green floral, citrus, rose, rosewood, herbal wood, lemon, peppermint; antiseptics such as paraoxybenzoate, phenoxyethanol, etc. Depending on the case, they can be used alone or in admixture of two or more.

  The compounding amount of the active ingredient is preferably 0.1 to 20% by weight, more preferably 0.5 to 10% by weight in the aqueous stock solution. If the blending amount of the active ingredient is less than 0.1% by weight, the active ingredient concentration decreases, so that the amount used tends to increase in order to obtain the desired effect. Becomes too high, making it easier to apply over the upper limit of use.

  The alcohols are used for the purpose of adjusting the foaming state, foam sustainability, foaming properties such as defoaming properties, and blending active ingredients that are difficult to dissolve in water.

  Examples of the alcohols include monohydric alcohols having 2 to 3 carbon atoms such as ethanol and isopropanol, and dihydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol, 1,3-butylene glycol, and glycerin. These can be used alone or in admixture of two or more. Among these, a divalent alcohol is preferable because it is excellent in foaming property at the time of discharge and the sustainability of the foam, and more easily foamed with hydrofluoroether.

  The blending amount when blending the alcohols is preferably 0.5 to 30% by weight, more preferably 1 to 25% by weight in the aqueous stock solution. If the blending amount of the alcohol is less than 0.5% by weight, the effect of blending the alcohol tends to be difficult to obtain. If the blending amount is more than 30% by weight, the foaming property is reduced, such as difficulty in foaming. It tends to be easier.

  The water-soluble polymer stabilizes the emulsification with an aliphatic hydrocarbon or hydrofluoroether by adjusting the viscosity of the aqueous stock solution, and adjusts the hardness and elasticity of the foam, the durability, the defoaming property, etc. Used for purposes.

  Examples of the water-soluble polymer include celluloses such as hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, nitrile cellulose, crystalline cellulose, methyl cellulose, and ethyl cellulose; gums such as xanthan gum, gellan gum, carrageenan, and guar gum; agar, dextrin, Pectin, starch, gelatin, gelatin hydrolyzate, sodium alginate, modified potato starch, polyvinyl alcohol, carboxyvinyl polymer and the like can be mentioned, and these can be used alone or in admixture of two or more.

  In the case of blending the water-soluble polymer, the blending amount is preferably 0.01 to 5% by weight, more preferably 0.05 to 3% by weight in the aqueous stock solution. If the blending amount of the water-soluble polymer is less than 0.01% by weight, the effect of adjusting the viscosity of the aqueous stock solution tends to be difficult to obtain. If it exceeds 5% by weight, the viscosity of the aqueous stock solution becomes too high. , It tends to be difficult to handle, such as difficulty in emulsification with aliphatic hydrocarbons and hydrofluoroethers.

  The oil component is used for the purpose of improving the feeling of use, such as improving the touch, improving sliding and combing, improving the moisture retention, and giving gloss.

  Examples of the oil component include ester oils such as diisopropyl adipate, diethoxyethyl succinate, isopropyl myristate, isopropyl palmitate; methyl polysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexa Silicone oils such as siloxane, methylcyclopolysiloxane, tetrahydrotetramethylcyclotetrasiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, methylphenylpolysiloxane; dimethicone crosspolymer, dimethicone / vinyl dimethicone crosspolymer, dimethicone / phenyldimethicone crosspolymer , Silicone elastomers such as dimethicone / copolyol crosspolymer; squalane, squale Liquid hydrocarbons such as liquid paraffin and isoparaffin; fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, isostearic acid, linoleic acid, linolenic acid; lauryl alcohol, myristyl alcohol, cetyl alcohol , Higher alcohols such as stearyl alcohol, aralkyl alcohol, behenyl alcohol, lanolin alcohol; fats such as avocado oil, macadamia nut oil, shea fat, olive oil, camellia oil; waxes such as beeswax, lanolin wax, candelilla wax, paraffin wax, etc. These can be used alone or in admixture of two or more. In addition, the hardness of a foam, elasticity, and sustainability can be adjusted by using what is a solid at normal temperature among the said oil-based components.

  The blending amount when blending the oily component is preferably 0.1 to 10% by weight, more preferably 0.5 to 5% by weight in the aqueous stock solution. When the blending amount of the oil component is less than 0.1% by weight, the blending effect of the oil component tends to be difficult to obtain. When the blending amount is more than 10% by weight, the aqueous stock solution is easily separated. There is a tendency that hydrocarbons and hydrofluoroethers are easily separated.

  The water is a main solvent of the aqueous stock solution, and examples of the water include purified water, ion exchange water, physiological saline, and deep ocean water. The alcohols may be added to water and used as an aqueous solvent.

  The blending amount of water is preferably 60 to 98% by weight, more preferably 70 to 95% by weight in the aqueous stock solution. If the blending amount of water is less than 60% by weight, the foamability and foam stability tend to be lowered, and if it is more than 98% by weight, the blending amount of the surfactant and other components decreases. Therefore, the desired effect tends to be difficult to obtain.

  The aqueous stock solution can be prepared by blending a surfactant, an active ingredient and the like with water. It should be noted that an active ingredient or an oily ingredient that is difficult to dissolve in water or insoluble in water may be added after solubilization in alcohols, or may be emulsified with water in the state of a stock solution.

(B) Hydrofluoroether The hydrofluoroether having a boiling point of 50 to 80 ° C. is mostly vaporized when foam is spread out to continue foaming. Examples thereof include methyl perfluorobutyl ether (boiling point 61 ° C.), ethyl perfluorobutyl ether (boiling point 76 ° C.), and mixtures thereof. Among these, methyl perfluorobutyl ether is preferable because it is easy to continue foaming when the foam is spread.

  The boiling point of the hydrofluoroether is 50 to 80 ° C, preferably 60 to 80 ° C. If the boiling point is less than 50 ° C, it tends to evaporate due to body temperature or outside air temperature, and the irritation tends to be strong. If it is higher than 80 ° C, it is difficult to evaporate even if massaged with fingers, and foaming is difficult to continue. Tend.

  The blending amount of the hydrofluoroether is 0.5 to 20% by weight in the aerosol composition, preferably 1 to 20% by weight, and more preferably 1 to 15% by weight. If the blending amount of the hydrofluoroether is less than 0.5% by weight, foaming tends to be difficult to sustain, and if it exceeds 20% by weight, the foaming lasts too long, and the foam disappears. There is a tendency to become difficult.

(C) Aliphatic hydrocarbon The aliphatic hydrocarbon having a boiling point of −50 to 5 ° C. is vaporized during discharge and used to discharge the aerosol composition in the form of foam. By including an aliphatic hydrocarbon having a boiling point of −50 to 5 ° C., after-draw can be suppressed because it can be discharged in a foam state.

  The boiling point of the aliphatic hydrocarbon is −50 to 5 ° C., preferably −50 to 0 ° C., and more preferably −45 to −5 ° C. If the boiling point of the aliphatic hydrocarbon is less than −50 ° C., the vapor pressure tends to be too high, and it tends to be scattered during discharge. If it is higher than 5 ° C., the surface temperature of the skin and the surrounding temperature may cause It tends to evaporate and tends to irritate the skin.

  Examples of the aliphatic hydrocarbon having a boiling point of −50 to 5 ° C. include propane (boiling point −42.0 ° C.), normal butane (boiling point −0.5 ° C.), and isobutane (boiling point −11.7 ° C.). Examples thereof include aliphatic hydrocarbons having 3 to 4 carbon atoms and mixtures thereof.

  In addition, the aliphatic hydrocarbon is adjusted to a desired vapor pressure by mixing the above-mentioned components, and in particular, the vapor pressure at 20 ° C. is 0.4 to 0 from the viewpoint of excellent foaming property and continuity of foaming. It is preferable to use a material having a pressure of 0.7 MPa, and it is more preferable to use a material having a pressure of 0.45 to 0.6 MPa. In order to adjust the aliphatic hydrocarbon to be within the range of the vapor pressure, it is preferable that propane is contained in the aliphatic hydrocarbon in an amount of 40 to 90% by weight, more preferably 45 to 80% by weight.

  The blending amount of the aliphatic hydrocarbon is 0.5 to 10% by weight, preferably 1 to 8% by weight, in the aerosol composition. When the blending amount of the aliphatic hydrocarbon is less than 0.5% by weight, the foaming property at the time of discharge is small and the bubble density is large, so that the foam is difficult to be discharged and the after-draw tends to increase. When the amount is more than 10% by weight, the foamability is large and the foam density is small, so that the foam becomes rough and the foaming tends to be difficult to continue.

  The blending ratio of the hydrofluoroether and the aliphatic hydrocarbon is preferably 30/70 to 90/10 (weight ratio), and more preferably 40/60 to 80/20. When the blending ratio is less than 30/70, foaming tends to be difficult to continue, and when it is larger than 90/10, foaming at the time of discharge tends to be weak and tends to be foamy and difficult to discharge.

  The foamable aerosol composition of the present invention constructed as described above is obtained by preparing an aqueous stock solution by blending the surfactant, an active ingredient blended as necessary, a water-soluble polymer, etc. in an aqueous solvent. The resulting aqueous stock solution can be prepared by filling an aerosol container together with hydrofluoroether and aliphatic hydrocarbon, and emulsifying the hydrofluoroether and aliphatic hydrocarbon in the aqueous stock solution. In addition, what pre-emulsified aqueous undiluted | stock solution and hydrofluoroether may be filled in an aerosol container, and an aliphatic hydrocarbon may be added to this and emulsified.

  When the resulting foamable aerosol composition is released from the aerosol container into the atmosphere, the aliphatic hydrocarbons are vaporized to foam the aqueous stock solution into a foam. Apply the obtained foam to the skin and hair, and then apply with a fingertip or brush, or if you shave with a razor, hydrofluoroether will slowly evaporate and foam, making it easy to apply on the coated surface. is there.

  The foamable aerosol composition of the present invention can be used for skin products such as shaving foam, facial cleansing foam, cleansing foam, skin care foam, antipruritic foam, anti-inflammatory analgesic foam, styling foam, treatment foam, wax foam, etc. It can be used for hair products.

  EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.

  The evaluation method is shown below.

<Discharge state>
A spout was attached to the aerosol container, the aerosol product was kept in a constant temperature water bath at 25 ° C. for 1 hour, and the aerosol composition was discharged. Evaluation was performed according to the following criteria.
○: Discharged in a foamed state, and foamed again when the foam was spread with fingers.
Δ1: Foaming at the time of discharge was small, but when the foam was spread with fingers, it foamed again.
Δ2: Discharged in a foamed state, but re-foaming when foam is spread with fingers is small.
X1: It was discharged in a liquid state with almost no foaming, and foamed when spread with fingers.
X2: Although it is discharged in a foamed state, it does not re-foam even if the foam is spread with a finger.

<Bubble extensibility>
The state when the discharged foam was spread on the cheek after spreading with the palm and spread with the fingertips was evaluated according to the following criteria.
○: Bubbles can be smoothly stretched and stretched thinly without interruption.
(Triangle | delta): Although a bubble expands, there exists a part interrupted.
X: Bubbles are difficult to stretch and break.

<Skin irritation>
The presence or absence of irritation when foam was applied to the cheek was evaluated according to the following criteria.
○: No irritation is felt.
X: Stimulation is felt.

<After Draw>
After the foam was discharged, the presence or absence of a residue (after-draw) discharged from the spout discharge hole was evaluated according to the following criteria.
○: Almost no after-draw.
Δ: There is a small amount of after-draw.
X: After draw continues for a long time.

Example 1
The following aqueous stock solution was prepared, and 69.6 g of the aqueous stock solution and 8.0 g of ethyl perfluorobutyl ether were emulsified. Next, 77.6 g of this emulsion was filled in an aluminum pressure vessel, and an aerosol valve was fixed to the opening of the vessel. Furthermore, 2.4g of liquefied petroleum gas was filled from the valve | bulb, and the container was shaken up and down to emulsify and the aerosol composition was manufactured. The evaluation results of the obtained aerosol composition are shown in Table 1.

<Aqueous stock solution>
Sucrose laurate (* 1) 5.0
1,3-butylene glycol 5.0
Glycerin 5.0
Acrylates / alkyl acrylate (C10-30) Crosspolymer (* 2) 0.4
2-Amino-2-ethyl-1-propanol 0.3
Methylparaben 0.2
Phenoxyethanol 0.2
Purified water 83.9
Total 100.0 (% by weight)

<Aerosol composition>
The above aqueous stock solution 87.0
Ethyl perfluorobutyl ether (* 3) 10.0
Liquefied petroleum gas (* 4) 3.0
Total 100.0 (% by weight)

* 1: Cosmelike L-160A (trade name), manufactured by Daiichi Kogyo Seiyaku Co., Ltd. * 2: Bemulen TR-1 (trade name), manufactured by NOVEON * 3: CF-76 (trade name), Sumitomo 3M Co., Ltd. * 4: Vapor pressure at 20 ° C is 0.54 MPa
Propane: isobutane: normal butane = 60: 10: 30 (weight ratio)

Example 2 (face washing foam)
The following aqueous stock solution was prepared, and 69.6 g of the aqueous stock solution and 8.0 g of methyl perfluorobutyl ether were emulsified. Next, 77.6 g of this emulsion was filled in an aluminum pressure vessel, and an aerosol valve was fixed to the opening of the vessel. Further, 2.4 g of liquefied petroleum gas (aliphatic hydrocarbon) was filled from the valve and emulsified by shaking the container up and down to produce an aerosol composition. The evaluation results of the obtained aerosol composition are shown in Table 1.

<Aqueous stock solution>
Palmitic acid (* 5) 10.0
Glycerin (* 6) 10.0
Triethanolamine 5.5
Cocamide DEA (* 7) 3.0
Methylparaben 0.1
Purified water 71.4
Total 100.0 (% by weight)

<Aerosol composition>
The above aqueous stock solution 87.0
Methyl perfluorobutyl ether (* 8) 10.0
Liquefied petroleum gas (* 4) 3.0
Total 100.0 (% by weight)

* 5: LUNAC P-95 (trade name), manufactured by Kao Corporation * 6: Concentrated glycerin (trade name), manufactured by Kao Corporation * 7: Amizole CDE (trade name), palm fatty acid diethanolamide, Kawaken Fine Chemical * 8: CF-61 (trade name), manufactured by Sumitomo 3M Limited

Example 3
An aerosol composition was prepared in the same manner as in Example 2 except that liquefied petroleum gas (* 9) having a vapor pressure at 20 ° C. of 0.47 MPa was used instead of liquefied petroleum gas (* 4) of Example 2. Manufactured. The evaluation results of the obtained aerosol composition are shown in Table 1.
* 9: Vapor pressure at 20 ° C is 0.47 MPa
Propane: isobutane: normal butane = 50: 12.5: 37.5 (weight ratio)

Example 4
An aerosol composition was prepared in the same manner as in Example 2 except that liquefied petroleum gas (* 10) having a vapor pressure of 0.39 MPa at 20 ° C. was used instead of liquefied petroleum gas (* 4) of Example 2. Manufactured. The evaluation results of the obtained aerosol composition are shown in Table 1.
* 10: Vapor pressure at 20 ° C is 0.39 MPa
Propane: isobutane: normal butane = 35: 16.2: 48.8 (weight ratio)

Example 5
Example 2 using 69.6 g (87% by weight) of the aqueous stock solution of Example 2, 2.4 g (3% by weight) of methyl perfluorobutyl ether, and 8.0 g (10% by weight) of liquefied petroleum gas (* 4). In the same manner, an aerosol composition was produced. The evaluation results of the obtained aerosol composition are shown in Table 1.

Comparative Example 1
An aerosol composition was produced in the same manner as in Example 2 except that isopentane (aliphatic hydrocarbon, boiling point: 27.9 ° C.) was used instead of methyl perfluorobutyl ether in Example 2. The evaluation results of the obtained aerosol composition are shown in Table 1.

Comparative Example 2
72.0 g (90% by weight) of the aqueous stock solution of Example 2 and 8.0 g (10% by weight) of methyl perfluorobutyl ether were emulsified. Next, 80 g of this emulsion was filled in the inner bag of the double aerosol container, nitrogen gas was filled in the space between the outer container and the inner bag, and an aerosol valve was fixed to the opening of the container. The evaluation results of the obtained aerosol composition are shown in Table 1.

Comparative Example 3
76.0 g (95% by weight) of the aqueous stock solution of Example 2 was filled in an aluminum pressure resistant container, and an aerosol valve was fixed to the opening of the container. Further, 4.0 g (5% by weight) of liquefied petroleum gas (* 4) was filled from the valve, and the container was shaken up and down to emulsify to produce an aerosol composition. The evaluation results of the obtained aerosol composition are shown in Table 1.

Claims (4)

70-98% by weight of an aqueous stock solution containing a surfactant,
0.5-20% by weight of a hydrofluoroether having a boiling point of 50-80 ° C. and 0.5-10% by weight of an aliphatic hydrocarbon having a boiling point of −50-5 ° C.
A foamable aerosol composition comprising: The foamable aerosol composition according to claim 1, wherein the amount of the surfactant is 0.1 to 20% by weight in the aqueous stock solution. The foamable aerosol composition according to claim 1 or 2, wherein the aliphatic hydrocarbon has a vapor pressure of 0.4 to 0.7 MPa at 20 ° C. The foamable aerosol composition according to any one of claims 1 to 3, wherein a blending ratio of the hydrofluoroether and the aliphatic hydrocarbon is 30/70 to 90/10 (weight ratio).