Aerosol cosmetics

Abstract

The aerosol cosmetic of the present invention contains: a stock solution containing the following components (A) and (G) and having a pH of 7.1 or higher and 10 or lower: (A) a water-soluble thickener, (G) water; and (C) carbon dioxide gas; the pH of the cosmetic immediately after spraying is 6 or higher and 7.0 or lower.

Description

Technical Field

[0001] This invention relates to aerosol cosmetics. Prior Technology

[0002] Dark circles, dullness, and other skin problems are caused by decreased blood flow. In order to improve these conditions, cosmetics that utilize the effects of carbon dioxide have been reviewed. For example, Patent Document 1 describes a cosmetic material that uses a specific combination of dimethyl polysiloxane and polyethylene glycol in a specific ratio, along with a water-soluble thickener, a specific surfactant, and carbon dioxide gas. This material inhibits the volatilization of carbon dioxide gas, resulting in a non-sticky feel on the skin after application, and provides excellent smoothness and softness.

[0003] (Patent Document 1) Japanese Patent Application Publication No. 2020-2126 Summary of the Invention

[0004] The aerosol cosmetic material related to this invention contains: A stock solution containing the following components (A) and (G), with a pH of 7.1 or higher and 10 or lower: (A) Water-soluble thickeners, (G) Water; and (C) Carbonic acid gas; The pH of the freshly sprayed cosmetic is between 6 and 7.0. Simple Explanation of the Diagram

[0005] Figure 1 is a diagram showing the methods for determining the volatilization rate and amount of carbon dioxide gas in Examples 1-11 and Comparative Examples 1-2. Figure 2 shows the method for determining the carbonic acid concentration of the sprayed cosmetic in Experiment Example 1. Figure 3 shows the carbonic acid concentration of the cosmetic immediately after spraying in Experiment Example 1. Figure 4 shows the carbonic acid concentration of the cosmetic after 20 minutes of spraying in Experiment Example 1. Figure 5 shows the skin rosiness (Δa value) when the aerosol cosmetic was applied to the skin in Experiment Example 2. Figure 6 shows the skin brightness (ΔL value) when the aerosol cosmetic was applied to the skin in Experiment Example 2. Figure 7 shows the skin's rosy complexion (visual appearance) when the aerosol cosmetic was applied to the skin in Experiment Example 2. Figure 8 shows the skin brightness (visual) when the aerosol cosmetic was applied to the skin in Experiment Example 2. Implementation

[0006] It is known that aerosol cosmetics containing carbon dioxide, when applied to the skin, can temporarily improve blood circulation, but it is quite difficult to improve the skin's lasting radiance.

[0007] The inventors of this case discovered that by setting the original solution of the aerosol cosmetic to a specific pH, the solubility when it becomes carbonate ions can be enhanced, the concentration of carbonate gas after spraying can be increased, and volatilization can be inhibited. Thus, it is possible to continuously supply carbonate gas to the skin, which not only makes the skin even and rosy, but also maintains a high L value and bright skin even after time.

[0008] The aerosol cosmetic of this invention can suppress the evaporation of carbon dioxide gas from the foam sprayed from the container, has a high concentration of carbon dioxide gas in the foam, and can continuously supply carbon dioxide gas to the skin. After use, the skin shows a significant increase in both Δa and ΔL, resulting in an even, rosy complexion and improved radiance. ΔL remains high even after prolonged exposure, maintaining brightness.

[0009] The component (A) used in this invention is a water-soluble thickener, preferably containing anionic polymers. The anionic polymer used in component (A) of this invention is any polymer commonly used in cosmetics, such as: polyacrylic acid, polymethacrylic acid, acrylic / alkyl acrylate copolymer, carboxyethylene polymer, carboxymethyl cellulose, carotene gum, styrax gum, polystyrene sulfonate, agar, glycyrrhizin, arachidonic acid gum, pectin, alginate, hyaluronic acid or its alkali metal salts, etc. Of these, from the viewpoint of suppressing foam collisions and retaining carbon dioxide, acrylic polymers are preferred, acrylic / alkyl acrylate copolymers and carboxyethylene polymers are more preferred, and polymers containing at least one of (acrylic / alkyl acrylate (C10-30) ester) copolymers and carboxyethylene polymers are particularly preferred. The term "(acrylic acid / alkyl (C10-30) acrylate copolymer" refers to a copolymer of C10-30 alkyl acrylate with acrylic acid, methacrylic acid, or lower alkyl esters thereof, which is crosslinked with sucrose using allyl ether or pentaerythritol using allyl ether. Commercially available products such as PEMULEN TR-1, PEMULEN TR-2, CARBOPOL ETD2020, CARBOPOL 1342, and CARBOPOL 1382 (all from Lubrizol Advanced Materials) can be used. Furthermore, water-soluble thickeners other than anionic polymers can be used in cosmetics, such as dextrin, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, and polyvinyl alcohol.

[0010] Component (A) may be one or more, and its content in the stock solution, from the viewpoint of suppressing foam collision and retaining carbon dioxide, is preferably 0.1% by mass or more, more preferably 0.15% by mass or more, particularly preferably 0.2% by mass or more, and even more preferably 0.25% by mass or more, and preferably 3% by mass or less, more preferably 2% by mass or less, particularly preferably 1% by mass or less, and even more preferably 0.8% by mass or less. Furthermore, the content of component (A) in the stock solution is preferably 0.1 to 3% by mass, more preferably 0.15 to 2% by mass, particularly preferably 0.2 to 1% by mass, and even more preferably 0.25 to 0.8% by mass.

[0011] Ideally, the stock solution should contain (B) alkali. Examples of bases in component (B) include: hydroxides of alkali metal salts such as potassium hydroxide and sodium hydroxide; hydroxides of alkaline earth metals such as magnesium hydroxide and calcium hydroxide; alkanolamines such as 2-amino-2-methyl-1-propanol, monoethanolamine, diethanolamine, and triethanolamine; basic amino acids such as L-arginine, lysine, and ornithine; and ammonia, ammonium hydroxide, sodium bicarbonate, potassium hydrogen phosphate, and sodium hydrogen phosphate. From the viewpoint that by setting the original solution of the aerosol cosmetic to a specific pH, thereby enhancing its solubility when it becomes carbonate ions, increasing the concentration of carbonate gas after spraying, and inhibiting volatilization, component (B) preferably contains at least one of potassium hydroxide, sodium hydroxide, potassium hydrogen phosphate, and sodium hydrogen phosphate.

[0012] Component (B) may be one or more types. The content, from the viewpoint of enhancing the solubility of the aerosol cosmetic when it becomes carbonate ions in the concentrate, increasing the concentration of carbonate gas after spraying, and suppressing volatilization, is preferably 0.1% by mass or more, more preferably 0.15% by mass or more, particularly preferably 0.17% by mass or more, particularly preferably 0.2% by mass or more, and preferably 2% by mass or less, more preferably 1.5% by mass or less, particularly preferably 1% by mass or less, and even more preferably 0.8% by mass or less. Furthermore, the content of component (B) in the concentrate is preferably 0.1 to 2% by mass, more preferably 0.15 to 1.5% by mass, particularly preferably 0.17 to 1% by mass, and even more preferably 0.2 to 0.8% by mass.

[0013] In the aerosol cosmetic of the present invention, the stock solution may further contain an oil component that is liquid at 25°C, which can improve the solubility of carbon dioxide gas, enhance skin penetration, and result in an even and rosy complexion after application, thus improving skin tone and brightness. The term "liquid" refers to a substance that is fluid at 25°C, and also includes paste-like substances. The oil components in the liquid state at 25℃ are those commonly used in cosmetics; there are no other restrictions. Examples include: polysiloxanes such as dimethyl polysiloxane, dimethyl cyclopolysiloxane, methylphenyl polysiloxane, methyl hydrogen polysiloxane, and higher alcohol-modified organic polysiloxanes; hydrocarbons such as paraffin hydrocarbons, squalane, and squalene; natural plant and animal oils primarily composed of triglycerides, such as toon oil, jojoba oil, olive oil, macadamia nut oil, avocado oil, and olive oil; glyceryl monostearate, glyceryl distearate, glyceryl monooleate, isopropyl palmitate, isopropyl stearate, butyl stearate, isopropyl myristate, diethyl phthalate, myristyl lactate, cetyl myristate, cetyl lactate, 2-ethylhexanoate, 2-ethylhexyl palmitate, and 2-octyl myristate. Monoester oils such as dialkyl esters, 2-octyldodecyl oleate, triisostearate glyceryl triisostearate, di-2-ethylhexanoate glyceryl di-p-methoxycinnamic acid, isotriadecyl isononanoate, monoisostearate monomyristate glyceryl monoisostearate, and alkyl (12-15 carbon) benzoate esters; diisopropyl adipate, diisobutyl adipate, neopentyl glycol didecanoate, tri(caprylic acid·capric acid) glyceryl triisostearate, tridecanoate glyceryl triisostearate, di(2-ethylhexanoate) neopentyl glycol ester, di(caprylic acid / capric acid) propylene glycol ester, 1-isostearyl-3-myristylglycerol, diisostearate malate, and N-lauryl-L-glutamic acid di(cholesterolyl·octyldodecyl ester); ether oils such as alkyl-1,3-dimethylbutyl ether and dioctyl ether; essential oils such as eucalyptus oil and peppermint oil, etc.

[0014] Among these, from the viewpoints of improving the solubility of carbon dioxide, enhancing skin penetration, achieving an even and rosy complexion after application, and improving skin brightness, polysiloxane oil, monoester oil, diester oil, and triester oil are preferred, and those containing at least liquid polysiloxane oil are even more preferred. Liquid polysiloxane oil can be used under the premise of being commonly used in cosmetics, and preferably contains dimethyl polysiloxane with a viscosity of 6 to 5000 mPa·s at 25°C. From the viewpoint of inhibiting the volatilization of carbon dioxide and improving its effect on the skin, the viscosity of dimethyl polysiloxane at 25°C is preferably 10 mPa·s or higher, and from the viewpoint of avoiding stickiness after application, it is preferably 1000 mPa·s or lower, more preferably 500 mPa·s or lower, and more preferably 10 to 1000 mPa·s at 25°C, more preferably 10 to 500 mPa·s. Here, "viscosity" refers to the value measured using a BM viscometer (manufactured by Toki Sangyo Co., Ltd.). When the viscosity is below 10000 mPa·s, the value is measured using rotor No. 3 at 12 rpm for 1 minute. When the viscosity exceeds 10000 mPa·s, the value is measured using rotor No. 4 at 12 rpm for 1 minute.

[0015] Ingredient (D) may be one or more types. The content of this ingredient in the concentrate is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and exceptionally preferably 1% by mass or more, and preferably 20% by mass or less, more preferably 15% by mass or less, and exceptionally preferably 10% by mass or less, from the perspective of improving the solubility of carbon dioxide, enhancing skin penetration, achieving an even and rosy complexion after application, and improving skin brightness. Furthermore, the content of ingredient (D) in the concentrate is preferably 0.1 to 20% by mass, more preferably 0.5 to 15% by mass, and exceptionally preferably 1 to 10% by mass.

[0016] The aerosol cosmetic of the present invention, from the viewpoint of suppressing the volatilization of carbon dioxide and improving the user experience after application, may further contain component (E) polyol in the concentrate. The polyol is preferably a diol or a triol. Examples of diols include: ethylene glycol, diethylene glycol, polyethylene glycol (number average molecular weight not exceeding 10,000), propylene glycol, dipropylene glycol, polypropylene glycol, propylene glycol, 1,3-butanediol, 1,3-propanediol, etc. Examples of terols include: glycerol, diglycerol, polyglycerol, etc. Another example is: polyoxybutylene polyoxyethylene polyoxypropylene glycerol ether (3B.O.)(8E.O.)(5P.O.) (manufactured by Nippon Oil Company, WILBRIDE S-753). Preferably, these contain one or more of the following: polyethylene glycol, dipropylene glycol, and 1,3-propanediol.

[0017] The polyol system of ingredient (E) may be one or more types. From the viewpoint of inhibiting the evaporation of carbon dioxide and imparting smoothness to the skin, the preferred content in the stock solution is 1% by mass or more, more preferably 1.5% by mass or more, and exceptionally preferably 2% by mass or more; furthermore, it is 25% by mass or less, more preferably 20% by mass or less, and exceptionally preferably 16% by mass or less. Furthermore, the preferred content of ingredient (E) in the stock solution is 1-25% by mass, more preferably 1.5-20% by mass, and exceptionally preferably 2-16% by mass.

[0018] The aerosol cosmetic of the present invention may further contain component (F) surfactant in the stock solution, which can make the foam finer when the carbon dioxide gas is sprayed and improve the foam retention. Surfactants can be used under the premise of being commonly used in cosmetics, such as nonionic surfactants, anionic surfactants, and cationic surfactants. Nonionic surfactants preferably contain one or more HLB2-20, more preferably HLB2-10 or HLB12-18 alone, or in combination. The term "HLB (Hydrophilic-Lipophilic Balance)" refers to the molecular weight of the hydrophilic portion of the total molecular weight of the surfactant. For nonionic surfactants, this value can be obtained using the Griffin formula.

[0019] Examples of nonionic surfactants in HLB12-18 include: polyglycerol fatty acid esters, polyethylene glycol fatty acid esters, sucrose fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene glycerol fatty acid esters, polyoxyethylene propylene glycol fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hardened castor oil, polyoxyethylene hardened castor oil fatty acid esters, polyoxyethylene sterol ethers, polyoxyethylene phytosterol ethers, polyoxyethylene cholesterol ethers, polyoxyethylene alkyl-modified organopolysiloxanes, and polyoxyalkyl-alkyl co-modified organopolysiloxanes, etc. One or more of these surfactants may be used. Of these, from the viewpoint of foaming properties during carbon dioxide injection, polyoxyethylene alkyl ether and polyoxyethylene cured castor oil are preferred.

[0020] From the perspective of the stability of the original solution, the content of nonionic surfactant in HLB12~18 is preferably 0.05~10% by mass, more preferably 0.1~4% by mass, and exceptionally preferably 0.2~2% by mass.

[0021] Examples of nonionic surfactants with HLB 2~10 include: sorbitan fatty acid esters with 8~22 carbon atoms; alkyl glycerol ethers such as isostearyl glycerol ether; and polyoxyalkyl-modified polysiloxane.

[0022] Examples of sorbitan fatty acid esters include: sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan sesquioleate, sorbitan coconut oil fatty acid ester, and sorbitan tristearate. For sorbitan monopalmitate, RHEODOL SP-P10 (HLB 6.7) can be used; for sorbitan monostearate, RHEODOL SP-S10V (HLB 4.7) can be used; for sorbitan monooleate, RHEODOL SP-O10V (HLB 4.3) can be used; for sorbitan sesquioleate, RHEODOL AO-15V (HLB 3.7) can be used; for sorbitan coconut oil fatty acid ester, RHEODOL SP-L10 (HLB 8.6) can be used; and for sorbitan tristearate, SP-S30V (HLB 2.1) can be used (all of which are manufactured by Kao Corporation).

[0023] Examples of polyoxyalkylene-modified polysiloxane systems include: polyoxyethylene-methylpolysiloxane copolymers and poly(oxyethylene-oxypropylene)-methylpolysiloxane copolymers. Commercially available products include: "KF-6015" (PEG-3 dimethylsiloxane) (HLB4.5) and "KF-6019" (PEG-9 dimethylsiloxane) (HLB4.5) sold by Shin-Etsu Chemical Co., Ltd.; and "SH-3775M" (PEG-12 dimethylsiloxane) (HLB5) and "SH-3773M" (PEG-12 dimethylsiloxane) (HLB8) sold by Toray Dow Corning Silicones Co., Ltd.

[0024] The content of nonionic surfactant HLB2~10 in the stock solution is preferably 0.01~2% by mass, and more preferably 0.05~1% by mass. In this invention, from the viewpoint of foaming, foam uniformity, and foam wetting ease, it is preferable to use a combination of one or more selected from HLB12-18 polyoxyethylene alkyl ethers and polyoxyethylene hardened castor oil, and HLB2-10 polyoxyalkylene modified polysiloxane.

[0025] Examples of anionic surfactants include: sodium lauryl sulfate, potassium lauryl sulfate, and other alkyl sulfates with 12 to 22 carbon atoms or their salts; polyoxyethylene lauryl ether phosphates with 12 to 22 carbon atoms or their salts; dialkyl sulfosuccinic acid with 12 to 24 carbon atoms or its salts; N-alkynylmethyl taurine with 12 to 22 carbon atoms or its salts; and N-acylglutamic acid with 12 to 22 carbon atoms or its salts. Among these, polyoxyethylene ether phosphates or their salts, and acylglutamic acid or its salts are preferred from the viewpoint of emulsification stability and the ability to generate more bubbles during spraying. In cases where anionic surfactants are present, the optimal concentration in the stock solution is 0.01-1% by mass, and more preferably 0.05-0.7% by mass.

[0026] The aerosol cosmetic of the present invention further contains component (G) water in the stock solution. Component (G) water acts as a solvent in the stock solution, becoming the remainder of the other components. The water content, from the viewpoint of enhancing its solubility as carbonate ions in the stock solution and providing excellent emulsification stability, is preferably 55-99% by mass, more preferably 65-95% by mass, and particularly preferably 70-90% by mass in the stock solution.

[0027] In the aerosol cosmetic of the present invention, the stock solution may further contain ingredients commonly used in cosmetics, such as: polymers other than those mentioned above, oil components other than those mentioned above, ethanol, preservatives, antioxidants, pigments, pH adjusters, fragrances, ultraviolet absorbers, moisturizers, blood circulation promoters, cooling agents, antiperspirants, bactericides, whitening agents, anti-inflammatory agents, skin activators, etc.

[0028] In the aerosol cosmetic of the present invention, the stock solution is prepared by mixing the above-mentioned components (A) and (G), as well as other components. From the viewpoint of suppressing the evaporation of carbonated foam and having an appropriate viscosity for application to the skin, the stock solution has a viscosity at 25°C of preferably 1000~10000 mPa·s, more preferably 1500~8500 mPa·s, particularly preferably 2000~7000 mPa·s, and even more preferably 3000~7000 mPa·s. Here, the viscosity is measured using a BM viscometer (manufactured by Toki Sangyo Co., Ltd.), with rotor No. 3, 12 rpm, and 1 minute. When the viscosity exceeds 10000 mPa·s, the value is measured with rotor No. 4, 12 rpm, and 1 minute.

[0029] The aerosol cosmetic of the present invention can enhance the solubility of the aerosol cosmetic when it becomes carbonate ions in the concentrate, increase the concentration of carbonate gas after spraying, and inhibit volatilization. After use, the skin not only has an increased Δa, but also a high increase in ΔL, resulting in a more even and rosy complexion and improved brightness. ΔL refers to the sustained brightness even after a period of time. The concentrate has a pH of 7.1 or higher and 10 or lower, preferably 7.1 to 9.5, and more preferably 7.1 to 9. In this invention, the pH of the stock solution was measured at 25°C using a pH / ION-METER F-72 manufactured by HORIBA.

[0030] The aerosol cosmetic of the present invention can be manufactured by filling the above-described stock solution and (C) carbonic acid gas into a pressure-resistant container. The spray pattern is preferably a foam spray. From the perspective of excellent foam production, even and rosy skin after application, and improved skin brightness, the mass ratio of the concentrate to carbon dioxide is 94:6~99.5:0.5, better 95:5~99:1, and exceptional 96.5:3.5~98.5:1.5.

[0031] The aerosol cosmetic of the present invention may contain, in addition to carbon dioxide gas in component (C), a propellant commonly used in aerosol cosmetics. Examples of propellants include liquefied petroleum gas and compressed gas. When a propellant other than carbon dioxide gas is contained, the amount of carbon dioxide gas relative to the total mass of carbon dioxide gas and propellant is preferably 85% by mass or more, more preferably 90% by mass or more, particularly preferably 95% by mass or more, and even more preferably 98% by mass or more. In this invention, when the propellant does not contain carbon dioxide or contains propellant other than carbon dioxide, the amount of carbon dioxide content relative to the total amount of carbon dioxide and propellant is preferably 85% by mass or more.

[0032] From the viewpoint of inhibiting the volatilization of carbon dioxide, increasing the concentration of carbon dioxide, and continuously supplying carbon dioxide to the skin, the pH of the aerosol cosmetic material of the present invention is preferably 6 or higher and 7.0 or lower, more preferably 6 to 6.9, and especially preferably 6.1 to 6.8. In this invention, the pH of the cosmetic immediately after spraying is measured at 25°C using a pH / ION-METER F-72 manufactured by HORIBA, while the cosmetic is being sprayed from the aerosol container and simultaneously filled into a glass container. The measurement is performed immediately after spraying from the aerosol container, and the value is used after 1 minute.

[0033] The aerosol cosmetic of the present invention can be used as a cosmetic without particular limitations, but because it inhibits the volatilization of carbon dioxide gas in the cosmetic after spraying, has a high concentration of carbon dioxide gas, and has a high effect of carbon dioxide gas action after application to the skin, it is suitable for use as a skin cosmetic. The aerosol cosmetic of the present invention can be applied to the skin according to the application environment, left for a certain period of time to allow it to blend with the skin, or wiped off or rinsed off.

[0034] The aerosol cosmetic of the present invention can be manufactured by ordinary methods, for example, by following steps 1 to 4. Step 1: Heat the aqueous phase containing (A) anionic polymer, (G) water and (B) alkali to above 50°C, and then disperse it using a disperser. Step 2: Add an oil phase component containing (D) oil agent and (F) surfactant to the aqueous phase obtained in step 1, disperse it using a disperser, and then stir it using a homogenizer. Step 3: After cooling the solution obtained in Step 2 to 15~30℃, add other ingredients such as fragrances as needed, and obtain the stock solution after stirring. Step 4: Fill the stock solution obtained in Step 3 into a pressure-resistant container, seal it, and fill the component (C) by applying pressure.

[0035] In relation to the above-described embodiments, the present invention further discloses the following components.

[0036] <1> An aerosol cosmetic material containing: A stock solution containing the following components (A) and (G), with a pH above 7.1 and below 10: (A) Water-soluble thickeners, (G) Water; and (C) Carbonic acid gas, The pH of the cosmetic immediately after spraying is above 6 and below 7.0.

[0037] <2> As mentioned above <1> Of the aerosol cosmetics described, component (A) preferably contains anionic polymers. <3> As mentioned above <1> or <2> The described aerosol cosmetic, wherein component (A) is preferably an acrylic polymer, more preferably an acrylic / alkyl acrylate copolymer or a carboxyethylene polymer, and especially preferably contains at least one selected from (acrylic / alkyl acrylate (C10-30) ester) copolymer and carboxyethylene polymer. <4> As mentioned above <1> ~ <3> The aerosol cosmetic as described in any one of the following, wherein the content of component (A) in the stock solution is preferably 0.1% by mass or more, more preferably 0.15% by mass or more, particularly preferably 0.2% by mass or more, and even more preferably 0.25% by mass or more, and preferably 3% by mass or less, more preferably 2% by mass or less, particularly preferably 1% by mass or less, and even more preferably 0.8% by mass or less.

[0038] <5> As mentioned above <1> ~ <4> The aerosol cosmetic described in any one of the above, wherein the stock solution further contains (B) alkali. <6> As mentioned above <5> The aerosol cosmetic described herein preferably contains at least one of potassium hydroxide, sodium hydroxide, potassium hydrogen phosphate and sodium hydrogen phosphate. <7> As mentioned above <5> or <6> The aerosol cosmetic described herein contains component (B) in the stock solution at a preferred mass percentage of 0.1% or more, more preferably 0.15% or more, particularly preferably 0.17% or more, and even more preferably 0.2% or more, and preferably 2% or less, more preferably 1.5% or less, even more preferably 1% or less, and even more preferably 0.8% or less.

[0039] <8> As mentioned above <1> ~ <7> The aerosol cosmetic described in any one of the above, wherein the stock solution preferably further contains (D) a liquid oil component at 25°C, more preferably polysiloxane oil, monoester oil, diester oil, or triester oil, and especially preferably contains at least liquid polysiloxane oil. <9> As mentioned above <8> Among the aerosol cosmetics described, the liquid polysiloxane is preferably a dimethyl polysiloxane with a viscosity of 6~5000 mPa·s at 25°C, more preferably a viscosity of 10~1000 mPa·s at 25°C, and particularly preferably a viscosity of 10~500 mPa·s at 25°C. <10> As mentioned above <8> or <9> The aerosol cosmetic described herein contains, in the stock solution, component (D) preferably at 0.1% by mass or more, more preferably at 0.5% by mass or more, and especially preferably at 1% by mass or more; furthermore, preferably at 20% by mass or less, more preferably at 15% by mass or less, and especially preferably at 10% by mass or less.

[0040] <11> As mentioned above <1> ~ <10> The aerosol cosmetic described in any one of the following, wherein the stock solution preferably contains (E) polyol, more preferably diol or triol, and most preferably one or more selected from polyethylene glycol, dipropylene glycol, and 1,3-propanediol. <12> As mentioned above <11> The aerosol cosmetics described herein contain, in the stock solution, component (E) of which preferably is 1% or more by mass, more preferably 1.5% or more by mass, and especially preferably 2% or more by mass; furthermore, preferably 25% or less by mass, more preferably 20% or less by mass, and especially preferably 16% or less by mass.

[0041] <13> As mentioned above <1> ~ <12> The aerosol cosmetic described in any one of the above preferably contains (F) a surfactant in the stock solution, more preferably a nonionic surfactant, especially a nonionic surfactant of HLB2~20, and even more preferably a nonionic surfactant of HLB2~10 or HLB12~18 used alone or in combination. <14> As mentioned above <13> Among the aerosol cosmetics described, the preferred nonionic surfactants for HLB12-18 are polyoxyethylene alkyl ethers and polyoxyethylene hardened castor oil; the preferred nonionic surfactants for HLB2-10 are sorbitan fatty acid esters with 8-22 carbon atoms, alkyl glycerol ethers, and polyoxyalkyl-modified polysiloxane. <15> As mentioned above <13> or <14> The aerosol cosmetics described herein contain, in the stock solution, a preferred content of 0.05-10% by mass, a more preferred content of 0.1-4% by mass, and an even more preferred content of 0.2-2% by mass. <16> As mentioned above <13> or <14> The aerosol cosmetics described herein contain, in the stock solution, a preferred content of 0.01-2% by mass and a more preferred content of 0.05-1% by mass of HLB2-10 nonionic surfactant. <17> As mentioned above <13> ~ <16> In any of the aerosol cosmetics described herein, the nonionic surfactant of component (F) is preferably a combination of one or more selected from HLB12-18 polyoxyethylene alkyl ethers and polyoxyethylene hardened castor oil, and HLB2-10 polyoxyalkylene modified polysiloxane.

[0042] <18> As mentioned above <1> ~ <17> The aerosol cosmetic as described in any one of the above, wherein the content of ingredient (G) in the stock solution is preferably 55-99% by mass, more preferably 65-95% by mass, and particularly preferably 70-90% by mass. <19> As mentioned above <1> ~ <18> The aerosol cosmetic described in any one of the above has a viscosity at 25°C of preferably 1000~10000 mPa·s, more preferably 1500~8500 mPa·s, particularly preferably 2000~7000 mPa·s, and even more preferably 3000~7000 mPa·s. <20> As mentioned above <1> ~ <19> Of the aerosol cosmetics described in any one of the above, the stock solution preferably has a pH of 7.1 to 9.5, and more preferably a pH of 7.1 to 9.

[0043] <21> As mentioned above <1> ~ <20> The aerosol cosmetic described in any of the above is manufactured by filling a pressure-resistant container with a stock solution and (C) carbonic acid gas. <22> As mentioned above <1> ~ <21> Of the aerosol cosmetics described in any one of them, the preferred spray form is a foam type sprayed in a foam-like manner. <23> As mentioned above <1> ~ <22> The mass ratio of the stock solution to carbon dioxide gas in any of the aerosol cosmetics described herein is preferably 94:6 to 99.5:0.5, more preferably 95:5 to 99:1, and exceptionally preferably 96.5:3.5 to 98.5:1.5. <24> As mentioned above <1> ~ <23> The aerosol cosmetic as described in any one of the following, wherein, preferably, when it does not contain a propellant other than carbon dioxide, or when it contains a propellant other than carbon dioxide, the carbon dioxide content is 85% or more by mass relative to the total mass of carbon dioxide and propellant. <25> As mentioned above <1> ~ <23> The aerosol cosmetic as described in any one of the following describes a propellant other than carbon dioxide, wherein the amount of carbon dioxide is preferably 85% by mass or more, more preferably 90% by mass or more, particularly preferably 95% by mass or more, and even more preferably 98% by mass or more. <26> As mentioned above <1> ~ <25> Of the aerosol cosmetics described in any one of the above, the pH of the freshly sprayed cosmetic is preferably pH 6-6.9, and even better is pH 6.1-6.8. <27> As mentioned above <1> ~ <26> Any of the aerosol cosmetics described in the above items are skin cosmetics.

[0044] <28> An aerosol cosmetic material containing: A stock solution containing the following components (A), (B), and (G), with a pH of 7.1 or higher and 10 or lower: (A) 0.1-7% by mass of anionic polymers selected from acrylic polymers (B) 0.1-2% by mass of an alkali selected from potassium hydroxide, sodium hydroxide, potassium hydrogen phosphate, and sodium hydrogen phosphate. (G) Water; and (C) Carbonic acid gas; The pH of the cosmetic immediately after spraying is above 6 and below 7.0.

[0045] <29> An aerosol cosmetic material containing: A stock solution containing the following components (A), (B), and (G), with a pH above 7.1 and below 9.5: (A) 0.15–2% by mass of anionic polymers selected from acrylic acid / alkyl acrylate copolymers and carboxyethylene polymers. (B) 0.15–1.5% by mass of an alkali selected from potassium hydroxide, sodium hydroxide, potassium hydrogen phosphate, and sodium hydrogen phosphate. (G) Water; and (C) Carbonic acid gas; The pH of the cosmetic immediately after spraying is above 6 and below 7.0. [Example]

[0046] [Examples 1-11 and Comparative Examples 1-2] Aerosol cosmetics with the compositions shown in Tables 1 and 2 were manufactured, and the viscosity and pH of the stock solution at 25°C, as well as the pH of the cosmetic immediately after spraying, were measured. Furthermore, the volatility of carbon dioxide gas, skin color (color measurement and visual inspection) immediately after application and after 3 minutes were evaluated. These results are summarized and presented in Tables 1 and 2.

[0047] (Manufacturing method) Step 1: Heat (A) water-soluble thickener, (G) water, (B) alkali and aqueous phase components containing polyethylene glycol to 58~68°C and disperse them using a disperser. Step 2: Add (D) oil, dipropylene glycol, 1,3-propanediol, and an oil phase component containing (F) surfactant to the aqueous phase obtained in Step 1. After dispersion using a disperser, stir using a homogenizer. Step 3: Cool the solution obtained in Step 2 to 15~30℃, add fragrance, and stir to obtain the stock solution. Step 4: Fill the stock solution obtained in Step 3 into a pressure-resistant container, seal it, and then pressurize it to fill component (C) to obtain an aerosol cosmetic. 2.4 parts by mass of carbon dioxide gas are added to 97.6 parts by mass of the stock solution. (Stock solution: Carbon dioxide gas = 97.6:2.4)

[0048] (Evaluation Method) (1) Viscosity of the original solution: 50g of the stock solution was filled into a 50mL glass container and measured using a BM viscometer (manufactured by Toki Sangyo Co., Ltd.) (rotor No. 3, 12rpm, 1min).

[0049] (2) pH of the original solution: 50g of the stock solution was filled into a 50mL glass container and the pH was measured at 25°C using a pH / ION-METER F-72 manufactured by HORIBA.

[0050] (3) pH of the cosmetic immediately after spraying: The cosmetic was sprayed from the aerosol container while simultaneously filling a 20 mL glass container, and the pH was measured at 25°C using a HORIBA pH / ION-METER F-72. Measurements were taken immediately after spraying from the aerosol container, and the readings were taken after 1 minute.

[0051] (4) Volatility of carbon dioxide gas: (4-1) Carbon dioxide vaporization rate: As shown in Figure 1, approximately 1 gf of each aerosol cosmetic was sprayed into a cylindrical glass container (volume 19 cm³). A carbon dioxide gas electrode CE-2041 (manufactured by DKK-TOA) was then inserted without contacting the cosmetic. The carbon dioxide concentration was immediately measured while the glass container was sealed. The measuring device (carbon dioxide ion concentration meter) was an ION / pH METER IM-32P. Measurements were taken immediately after spraying. The change in carbon dioxide concentration was calculated for every minute during the 4-minute period from the start of measurement to 5 minutes. This change was set as the carbon dioxide evaporation rate (ppm / min).

[0052] (4-2) Carbon dioxide volatilization amount: Similar to (4-1), the concentration of carbon dioxide was measured 10 minutes and 20 minutes after the start of the measurement.

[0053] (5) Skin tone evaluation (color measurement value): Install a shaker cup (3.4cm in diameter) on the inside of your forearm. Spray 0.5g of the cosmetic directly from the aerosol container into the shaker cup and spread it as evenly as possible using a spatula. Leave it on for 2 minutes, then wipe it off with a tissue. The a and L values ​​of the skin were measured using a colorimeter CM2600d (manufactured by Konica Minolta) before and after makeup application. The measurement was performed three times on one area, immediately after makeup removal and again after 3 minutes. Using the measured values ​​of a and L, calculate the average of the three measurements. Calculate the differences Δa and ΔL between these values ​​and the values ​​before coating.

[0054] (6) Skin tone evaluation (visual): When measuring the above color values, the skin's rosiness and brightness were evaluated visually according to the following criteria, and the average of three measurements was taken. 2: Very rosy / Very bright. 1.5: Between very rosy and rosy / Between very bright and bright. 1: Rosy / bright. 0.5: Slightly reddish / slightly bright. 0: Same as before coating.

[0055] [Table 1] Ingredient Name Raw material name Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 (A) Acrylic acid-alkyl methacrylate copolymer Lubrizol PEMULEN TR-1 0.35 0.4 0.4 0.4 0.5 0.4 0.4 (B) Potassium hydroxide solution (48%) 0.612 0.6 0.7 0.7212 1.25 0.15 (B) Sodium hydroxide (48%) 0.45 Potassium dihydrogen phosphate 0.05 0.2 0.121 0.5 0.15 0.15 (D) Dimethylpolysiloxane 10cs Shin-Etsu Chemical Industry Co., Ltd. KF-96A-10CS 2.02 2.02 2.02 2.02 2.02 2.02 2.02 (D) Dimethyl polysiloxane 50cs Shin-Etsu Chemical Industry Co., Ltd. KF-96A-50CS 2.0 2.0 2.0 2.0 2.0 2.0 2.0 (D) Dimethyl polysiloxane 100cs Shin-Etsu Chemical Industry Co., Ltd. KF-96A-100CS 0.5 0.5 0.5 0.5 0.5 0.5 0.5 (D) Isotridecane isononanoate SALACOS 913 manufactured by Nisshin OilliO Company 2.0 2.0 2.0 2.0 2.0 2.0 2.0 (E) dipropylene glycol 5.0 5.0 5.0 5.0 5.0 5.0 5.0 (E) 1,3-Propanediol 2.0 2.0 2.0 2.0 2.0 2.0 2.0 (E) Polyethylene glycol 1540 1.0 1.0 1.0 1.0 1.0 1.0 1.0 (F) Polyoxyethylene-cured castor oil EMANON CH-60(K)(HLB14) manufactured by Kao Corporation 0.5 0.5 0.5 0.5 0.5 0.5 0.5 (F) Polyoxyethylene·methylpolysiloxane copolymer Shin-Etsu Chemical Industry Co., Ltd. KF-6015 (HLB4.5) 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Lauryl methacrylate·ethylene dimethacrylate Aqueous dispersion of alcohol-sodium methacrylate copolymer 1.25 1.25 1.25 1.25 1.25 1.25 1.25 Methyl paraben 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Disodium ethylenediaminetetraacetate 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Phenoxyethanol 0.35 0.35 0.35 0.35 0.35 0.35 0.35 Nicotinic acid amide 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 spices 0.1 0.1 0.1 0.1 0.1 0.1 0.1 (G) Purified water 81.5679 81.4799 81.2299 81.2677 80.2799 81.5299 81.8299 Total of original solutions 1000 1000 1000 1000 1000 1000 1000 (A) Calculation 0.35 0.40 0.40 0.40 0.50 0.40 0.40 (B) Calculation 0.29 0.29 0.34 0.35 0.60 0.22 0.07 (D) Calculation 6.52 6.52 6.52 6.54 6.52 6.52 6.52 (C) Carbon dioxide gas 2.4 2.4 2.4 2.4 2.4 2.4 2.4 Original solution viscosity (mPa·s) 6090 6930 3860 4750 5060 4820 4720 stock solution pH 8.47 7.49 7.42 8.02 7.94 7.32 5.06 pH of the cosmetic immediately after spraying 6.21 6.15 6.26 6.30 6.48 6.21 5.07 Volatility of carbon dioxide gas Carbon dioxide vaporization rate (ppm / min): 1~5 minutes 28.4 19.5 27.8 28.1 28.4 27.2 32.4 Carbon dioxide gas volatilization: Concentration after 10 minutes (ppm) 223.3 163.0 223.3 230.0 230.0 220.0 256.7 Carbon dioxide gas volatilization: Concentration after 20 minutes (ppm) 316.7 230.0 326.7 320.0 330.0 313.3 366.7 Skin tone evaluation (color value) Skin appears rosy: Δa value (right after application) 3.1 2.7 2.9 2.8 2.2 2.6 1.9 Skin glows: Δa value (after 3 minutes) -0.9 -1.2 -1.0 -0.6 -1.3 -0.9 -1.3 Skin brightness: ΔL value (right after application) -2.0 -1.6 -1.8 -1.5 -1.1 -1.4 -1.7 Skin radiance: ΔL value (after 3 minutes) 1.1 1.2 1.0 1.1 1.6 1.3 0.8 Skin tone assessment (visual) Skin is rosy: Visual score (right after wiping) 2.0 2.0 2.0 2.0 2.0 2.0 1.5 Skin radiance: Visual score (after 3 minutes) 1.5 2.0 1.3 2.0 1.7 1.7 0.8

[0056] [Table 2] Ingredient Name Raw material name Example 7 Example 8 Example 9 Example 10 Example 11 Comparative Example 2 (A) Acrylic acid-alkyl methacrylate copolymer Lubrizol PEMULEN TR-1 0.275 0.6 0.4 0.4 0.4 0.4 (B) Potassium hydroxide solution (48%) 0.45 1.1 0.7 0.7 0.7 0.7 Potassium dihydrogen phosphate 0.4134 0.1 0.1 0.1 0.1 (D) Methyl polysiloxane 10cs Shin-Etsu Chemical Industry Co., Ltd. KF-96A-10CS 2.02 2.02 2.02 2.02 2.02 2.02 (D) Methyl polysiloxane 50cs Shin-Etsu Chemical Industry Co., Ltd. KF-96A-50CS 2.0 2.0 2.0 2.0 2.0 2.0 (D) Methyl polysiloxane 100cs Shin-Etsu Chemical Industry Co., Ltd. KF-96A-100CS 0.5 0.5 0.5 0.5 0.5 0.5 (D) Isotridecane isononanoate SALACOS 913 manufactured by Nisshin OilliO Company 2.0 2.0 2.0 2.0 2.0 2.0 (E) dipropylene glycol 5.0 5.0 5.0 5.0 5.0 5.0 (E) 1,3-Propanediol 2.0 2.0 2.0 2.0 2.0 2.0 (E) Polyethylene glycol 1540 1.0 1.0 1.0 1.0 1.0 1.0 (F) Polyoxyethylene-cured castor oil EMANON CH-60(K)(HLB14) manufactured by Kao Corporation 0.5 0.5 0.5 0.5 0.5 0.5 (F) Polyoxyethylene·methylpolysiloxane copolymer Shin-Etsu Chemical Co., Ltd. manufactured KF-6015 (HLB4.5) 0.5 0.5 0.5 0.5 0.5 0.5 Lauryl methacrylate·ethylene glycol dimethacrylate Sodium methacrylate copolymer aqueous dispersion 1.25 1.25 1.25 1.25 1.25 1.25 Methyl paraben 0.2 0.2 0.2 0.2 0.2 0.2 Disodium ethylenediaminetetraacetate 0.05 0.05 0.05 0.05 0.05 0.05 Phenoxyethanol 0.35 0.35 0.35 0.35 0.35 0.35 Nicotinic acid amide 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 spices 0.1 0.1 0.1 0.1 0.1 0.1 Sodium bicarbonate 4.58 (G) Purified water 81.7849 80.3965 81.3099 81.3099 81.3099 76.7299 Total of original solutions 100.0 100.0 100.0 100.0 100.0 100.0 (A) Calculation 0.275 0.60 0.40 0.40 0.40 0.40 (B) Calculation 0.22 0.53 0.34 0.34 0.34 0.34 (D) Calculation 6.54 6.54 6.54 6.54 6.54 6.54 (C) Carbon dioxide gas 2.4 2.4 1.5 3.6 2.16 LFG 0.24 5.9 Original solution viscosity (mPa·s) 3890 8660 4700 4700 4980 0 stock solution pH 8.42 7.60 8.17 8.17 8.00 8.14 pH of the cosmetic immediately after spraying 6.13 6.29 6.14 6.16 6.23 8.66 Volatility of carbon dioxide gas Carbon dioxide vaporization rate (ppm / min): 1~5 minutes 29.3 24.0 23.7 25.9 29.2 8.0 Carbon dioxide gas volatilization: Concentration after 10 minutes (ppm) 220.0 184.7 179.0 197.7 220.0 50.3 Carbon dioxide gas volatilization: Concentration after 20 minutes (ppm) 303.3 250.0 253.3 283.3 283.3 50.7 Skin tone evaluation (color value) Skin appears rosy: Δa value (right after application) 2.74 2.73 2.42 2.45 2.73 -0.50 Skin glows: Δa value (after 3 minutes) -1.24 -0.62 -0.83 -1.01 -0.89 -0.25 Skin brightness: ΔL value (right after application) -1.73 -1.27 -1.22 -1.24 -2.00 0.73 Skin radiance: ΔL value (after 3 minutes) 1.87 1.58 1.20 1.80 1.22 0.10 Skin tone assessment (visual) Skin is rosy: Visual score (right after wiping) 2.00 1.83 1.83 2.00 2.00 0.00 Skin radiance: Visual score (after 3 minutes) 1.50 1.17 1.17 1.50 1.33 0.00

[0057] [Examples 12-17] Aerosol cosmetics with the compositions shown in Tables 3 and 4 were prepared in the same manner as in Examples 1-11. The viscosity and pH of the stock solution at 25°C, as well as the pH of the cosmetic immediately after spraying, were measured. The results are combined and shown in Tables 3 and 4. The cosmetics in Examples 12-17 all exhibited suppressed carbon dioxide volatilization and high carbon dioxide concentration when sprayed from the container, resulting in even and rosy skin after application and improved skin brightness.

[0058] [Table 3] Ingredient Name Raw material name Example 12 Example 13 Example 14 (A) Acrylic acid-alkyl methacrylate copolymer Lubrizol PEMULEN TR-1 - 0.3 0.4 (A) Carboxyethylene polymer CARBOPOL 981 POLYMER manufactured by Lubrizol Corporation 0.4 - (B) Potassium hydroxide solution (48%) 0.6 0.45 0.631 Potassium dihydrogen phosphate 0.05 0.0375 (B) Sodium hydrogen phosphate 0.3014 Sodium dihydrogen phosphate 0.0169 (D) Dimethylpolysiloxane 10cs Shin-Etsu Chemical Industry Co., Ltd. KF-96A-10CS 2.02 2.02 2.02 (D) Dimethyl polysiloxane 50cs Shin-Etsu Chemical Industry Co., Ltd. KF-96A-50CS 2.0 2.0 2.0 (D) Dimethyl polysiloxane 100cs Shin-Etsu Chemical Industry Co., Ltd. KF-96A-100CS 0.5 0.5 0.5 (D) Isotridecane isononanoate SALACOS 913 manufactured by Nisshin OilliO Company 2.0 2.0 2.0 (E) dipropylene glycol 5.0 5.0 5.0 (E) 1,3-Propanediol 2.0 2.0 2.0 (E) Polyethylene glycol 1540 1.0 1.0 1.0 (F) Polyoxyethylene-cured castor oil EMANON CH-60(K)(HLB14) manufactured by Kao Corporation 0.5 0.5 0.5 (F) Polyoxyethylene·methylpolysiloxane copolymer Shin-Etsu Chemical Industry Co., Ltd. KF-6015 (HLB4.5) 0.5 0.5 0.5 (A) Sanxianjiao - 0.05 - Aqueous dispersion of lauryl methacrylate, ethylene glycol dimethacrylate, and sodium methacrylate copolymer 1.25 1.25 - Anhydrous silica AGC Corporation, SUNSPHERE NP-30 0.1 Methyl paraben 0.2 0.2 0.2 Disodium ethylenediaminetetraacetate 0.05 0.05 0.05 Phenoxyethanol 0.35 0.35 0.35 Nicotinic acid amide 0.0001 0.0001 - spices 0.1 0.1 0.1 Carrot extract 0.1 0.1 0.1 (G) Purified water 81.3799 81.5924 82.2307 Total of original solutions 100.00 100.00 100.00 (A) Calculation 0.40 0.35 0.40 (B) Calculation 0.29 0.22 0.60 (D) Calculation 6.52 6.52 6.52 (C) Carbon dioxide gas 2.4 2.4 2.4 Original solution viscosity (mPa·s) 4280 5310 4570 stock solution pH 7.60 7.50 8.10 pH of the cosmetic immediately after spraying 6.20 6.11 6.27

[0059] [Table 4] Ingredient Name Raw material name Example 15 Example 16 Example 17 (A) Acrylic acid-alkyl methacrylate copolymer Lubrizol PEMULEN TR-1 0.35 0.35 0.4 (B) Potassium hydroxide solution (48%) 0.575 0.6 0.6 Potassium dihydrogen phosphate 0.08 0.05 0.05 (B) L-arginine L-arginine (Grade C) 0.2 (D) Dimethylpolysiloxane 10cs Shin-Etsu Chemical Industry Co., Ltd. KF-96A-10CS 2.02 2.02 2.02 (D) Dimethyl polysiloxane 50cs Shin-Etsu Chemical Industry Co., Ltd. KF-96A-50CS 2.0 2.0 2.0 (D) Dimethyl polysiloxane 100cs Shin-Etsu Chemical Industry Co., Ltd. KF-96A-100CS 0.5 0.5 0.5 (D) Isotridecane isononanoate SALACOS 913 manufactured by Nisshin OilliO Company 2.0 2.0 2.0 (E) dipropylene glycol 5.0 5.0 5.0 (E) 1,3-Propanediol 2.0 2.0 2.0 (E) Polyethylene glycol 1540 1.0 1.0 1.0 (E) Polyethylene glycol 400 0.1 (F) Polyoxyethylene-cured castor oil EMANON CH-60(K)(HLB14) manufactured by Kao Corporation 0.5 0.5 0.5 (F) Polyoxyethylene·methylpolysiloxane copolymer Shin-Etsu Chemical Industry Co., Ltd. KF-6015 (HLB4.5) 0.5 0.5 0.5 (A) Hydroxyethyl cellulose Daicel Miraizu Corporation HEC Daicel SE900 0.1 Aqueous dispersion of lauryl methacrylate, ethylene glycol dimethacrylate, and sodium methacrylate copolymer 1.25 1.25 Anhydrous silica AGC Corporation, SUNSPHERE NP-30 0.1 Methyl paraben 0.2 0.2 Disodium ethylenediaminetetraacetate 0.05 0.05 0.05 Phenoxyethanol 0.35 0.35 0.35 Nicotinic acid amide 0.0001 0.0001 spices 0.1 0.1 0.1 Carrot extract 0.1 0.1 0.1 Eucalyptus extract 0.0001 (G) Purified water 82.675 81.3299 81.1799 Total of original solutions 100.0 100.00 100.00 (A) Calculation 0.35 0.45 0.40 (B) Calculation 0.28 0.29 0.49 (D) Calculation 6.52 6.52 6.52 (C) Carbon dioxide gas 2.4 2.4 2.4 Original solution viscosity (mPa·s) 5100 4280 4280 stock solution pH 8.12 7.60 7.60 pH of the cosmetic immediately after spraying 6.20 6.20 6.20

[0060] [Experimental Example 1] For the aerosol cosmetics of Example 4 and Comparative Example 1, the carbonic acid concentration of the cosmetics was measured immediately after spraying and 20 minutes later. The results are shown in Figures 3 and 4.

[0061] (Method for determining carbonic acid concentration) As shown in Figure 2, accurately measure 30g of purified water into a spiral tube and add 2 drops of 48% KOH aqueous solution. Record the correct amount of 48% KOH. Then, accurately measure approximately 1.0g of cosmetic material by directly spraying it into the spiral tube using an aerosol container and stir for 5 minutes. Next, accurately measure 2.5g of 20% citric acid and immediately determine the carbonic acid concentration using an ion concentration meter. The aqueous solution of the sample was stirred while the measurement was performed. The concentration of carbonic acid in cosmetics can be calculated using the following formula based on the measurement results obtained from an ion concentration meter. Carbonic acid concentration (ppm) in cosmetics = Measured value (ppm) × {Cosmetic weight (g) / (Cosmetic weight (g) + Water weight (g) + 48% KOH weight (g) + 20% Citric acid weight (g)}

[0062] As shown in Figures 3 and 4, the carbonic acid concentration of the cosmetic in Example 4 was higher than that in Comparative Example 1 both immediately after spraying and after 20 minutes.

[0063] [Experimental Example 2] For the aerosol cosmetics of Example 4 and Comparative Example 1, the skin rosiness and skin brightness (color measurement and visual inspection) when applied to the skin were evaluated. The results are shown in Figures 5 to 8.

[0064] (Evaluation Method) Attach a shaker cup (3.4cm in diameter) to the inside of your forearm. Spray 0.5g of cosmetic directly into the cup from the aerosol container. Use a spatula to spread the product as evenly as possible. Leave on for 2 minutes, then wipe off with a tissue. (i) Colorimetric values; The a and L values ​​of the skin before and after applying makeup were measured using a colorimeter CM2600d (manufactured by Konica Minolta). The measurement was repeated three times for one area. The measurement was taken every minute from immediately after makeup removal until 5 minutes later. Using the measured values ​​of a and L, calculate the average of the three measurements. Calculate the differences Δa and ΔL between these values ​​and the values ​​before coating.

[0065] (ii) Visual inspection: When measuring the above color values, the skin's rosiness and brightness were evaluated visually according to the following criteria, and the average of three measurements was taken. 2: Very rosy / Very bright. 1.5: Between very rosy and rosy / Between very bright and bright. 1: Rosy / bright. 0.5: Slightly reddish / slightly bright. 0: Same as before coating.

[0066] As shown in Figures 5-8, compared to the aerosol cosmetic of Comparative Example 1, the aerosol cosmetic of Example 4, when applied to the skin, exhibits higher increases in Δa and ΔL over a long period, resulting in a more even, rosy complexion and improved skin brightness. In particular, it provides sustained brightening of the skin.

Claims

1. An aerosol cosmetic comprising: a stock solution containing the following components (A), (B) and (G), and having a pH of 7.1 or higher and 10 or lower: (A) a water-soluble thickener containing anionic polymers; (B) an alkali containing at least one selected from potassium hydroxide, sodium hydroxide, potassium hydrogen phosphate and sodium hydrogen phosphate; (G) water; and (C) carbonic acid gas; wherein the pH of the cosmetic immediately after spraying is 6 or higher and 7.0 or lower.

2. As in request item 1, the aerosol cosmetic, wherein, Component (A) contains at least one selected from (acrylate / alkyl acrylate (C10-30) ester) copolymer and carboxyethylene polymer.

3. As in request item 1 or 2, the aerosol cosmetic, wherein, The original solution contains 0.1 to 3% by mass of component (A).

4. Aerosol cosmetics as requested in item 1 or 2, wherein, The original solution contains 0.1 to 2% by mass of component (B).

5. Aerosol cosmetics as requested in item 1 or 2, wherein, The original solution further contains (D) oil components that are liquid at 25°C.

6. Aerosol cosmetics as requested in item 1 or 2, wherein, The viscosity of the stock solution at 25°C is 1000~10000 mPa・s.

7. Aerosol cosmetics as requested in item 1 or 2, wherein, The mass ratio of the original solution to carbonic acid gas is 94:6 to 99.5:0.

5.

8. Aerosol cosmetics as requested in item 1 or 2, wherein, When the propellant does not contain carbon dioxide or contains propellant other than carbon dioxide, the carbon dioxide content is 85% or more by mass relative to the combined mass of carbon dioxide and propellant.

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