Aerosol cosmetic

Abstract

To provide an aerosol cosmetic that has uniform texture of discharged foam and retains the foam for a long time, allowing for continuous massage.SOLUTION: Provided is an aerosol cosmetic containing a stock solution which contains the following components (A), (B), and (C): (A) an anionic surfactant, (B) an anionic polymer, and (C) a cationic polymer having a cationic charge density of 5.0 meq / g or less, with the mass ratio of the component (A) to the total amount of the component (B) and the component (C), (A) / ((B)+(C)), being 6 or more, and (D) carbon dioxide gas.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to aerosol cosmetics.

Background Art

[0002] Current skin problems such as dark circles and dullness are caused by reduced blood flow. To improve these problems, cosmetics utilizing the carbon dioxide effect have been studied. For example, Patent Document 1 describes a foamy skin applicator containing N-acyl amino acid or its salt, (meth)acrylic acid polymer, polysaccharide polymer, carbon dioxide, and hydrocarbons having 3 to 5 carbon atoms. Patent Document 2 describes a foamy skin applicator containing a specific surfactant, (meth)acrylic acid polymer, polysaccharide polymer, carbon dioxide, and hydrocarbons having 3 to 5 carbon atoms. Both are described as having a good blood circulation promoting effect.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document?

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, conventional carbon dioxide-containing aerosol cosmetics have problems in that the texture of the foam ejected from the container is not uniform, the foam retention is poor, and there is an issue with the persistence of massage.

Means for Solving the Problems

[0005] The present inventor has found that by using an anionic surfactant at a specific ratio with respect to an anionic polymer and a cationic polymer having a specific charge density, an aerosol cosmetic with uniform texture of the ejected foam, good foam retention, and excellent massage persistence can be obtained.

[0006] The present invention comprises the following components (A), (B), and (C): (A) Anionic surfactant, (B) Anionic polymer, (C) Cationic polymers with a cation charge density of 5.0 meq / g or less A stock solution containing the above, wherein the mass ratio of component (A) to the total amount of components (B) and (C) (A) / ((B)+(C)) is 6 or more, and (D) Carbon dioxide This relates to aerosol cosmetics containing [a specific ingredient / component].

[0007] Furthermore, the present invention relates to the following steps 1-3: Step 1: A step of stirring the components (A) and (B) and heating them to 50°C or higher to mix them. Step 2: Next, add component (C), stir and mix to prepare the stock solution. Step 3: After cooling the stock solution obtained in Step 2, fill it into a pressure-resistant container, seal it, and then fill it by pressurizing it with component (D). The present invention relates to a method for producing the aerosol cosmetic, characterized by containing the above. [Effects of the Invention]

[0008] The aerosol cosmetic of the present invention produces a uniform foam, has good foam retention, and offers excellent duration for massage. Furthermore, it leaves the skin feeling moisturized for a long time after washing. [Modes for carrying out the invention]

[0009] The anionic surfactant used in the present invention is one commonly used in cosmetics, for example, fatty acids with 12 to 22 carbon atoms or their salts, such as sodium laurate, potassium palmitate, and arginine stearate; alkyl sulfate esters with 12 to 22 carbon atoms or their salts, such as sodium lauryl sulfate and potassium lauryl sulfate; polyoxyethylene alkyl ether sulfates or their salts, such as polyoxyethylene(2) sodium lauryl sulfate; polyoxyethylene oleyl ether sodium phosphate, polyoxyethylene stearyl ether sodium phosphate, and polyoxyethylene lauryl ether sodium phosphate with 12 to 22 carbon atoms. Examples include ethylene alkyl ether phosphate or its salts; dialkyl sulfosuccinates having 12 to 24 carbon atoms, such as sodium di-2-ethylhexyl sulfosuccinate, or its salts; N-alkylyl methyl taurates having 12 to 22 carbon atoms, such as sodium N-stearoyl-N-methyl taurate, or its salts; and acyl glutamates having 12 to 22 carbon atoms, such as sodium dilauroyl glutamate, monosodium N-lauroyl glutamate, sodium N-stearoyl-L-glutamate, sodium N-stearoyl-L-glutamate arginine, sodium N-stearoyl glutamate, and sodium N-myristoyl-L-glutamate, or their salts. Of these, polyoxyethylene alkyl ether sulfate or its salt, N-carbon 12-22 acyl glutamic acid or its salt are preferred from the viewpoint of making the bubbles finer when carbon dioxide is discharged and improving the bubble retention, and polyoxyethylene lauryl ether sulfate or its salt, N-coconut oil fatty acid acyl glutamic acid or its salt are more preferred.

[0010] Examples of these salts include alkali metals such as sodium and potassium; alkaline earth metals such as calcium and magnesium; ammonium; organic ammonium derived from alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine; trishydroxymethylaminomethane; and basic amino acids such as L-arginine, with sodium being preferred.

[0011] The anionic surfactant of component (A) can be used in combination of one or more types. From the viewpoint of making the bubbles finer when carbon dioxide is discharged and improving the bubble retention, the content is preferably 1% by mass or more in the stock solution, more preferably 3% by mass or more, even more preferably 5% by mass or more, preferably 40% by mass or less, more preferably 25% by mass or less, and even more preferably 15% by mass or less. Furthermore, the content of component (A) is preferably 1 to 40% by mass in the stock solution, more preferably 3 to 25% by mass, and even more preferably 5 to 15% by mass.

[0012] The anionic polymer of component (B) can be any polymer commonly used in cosmetics, such as polyacrylic acid, polymethacrylic acid, acrylic acid / (meth)acrylate alkyl copolymer, carboxyvinyl polymer, polyoxyethylene alkyl ether modified acrylic acid copolymer, and other acrylic acid polymers; carboxymethylcellulose, carrageenan, xanthan gum, polystyrene sulfonate, agar, gatchigum, karaya gum, pectin, alginate salts, hyaluronic acid or its alkali metal salts, etc. Of these, acrylic acid polymers are preferred from the viewpoint of suppressing foam collisions and retaining carbon dioxide, acrylic acid / (meth)acrylate alkyl copolymers, carboxyvinyl polymers, and polyoxyethylene alkyl ether-modified acrylic acid copolymers are more preferred, and it is even more preferable to include at least one selected from (acrylic acid / (meth)acrylate alkyl (C10-30)) copolymer, carboxyvinyl polymer, and (acrylates / methacrylate steareth-20) copolymer. Here, the (acrylic acid / (meth)acrylate (C10-30)) copolymer is a copolymer of C10-30 alkyl acrylic acid and acrylic acid, methacrylic acid, or their lower alkyl esters, crosslinked with sucrose allyl ether or pentaerythritol allyl ether. Commercial products such as Pemlen TR-1, Pemlen TR-2, Carbopol ETD2020, Carbopol 1342, and Carbopol 1382 (all from Lubrizol Advanced Materials) can be used. In addition, as the (acrylic acid / methacrylate steareth-20) copolymer, commercial products such as Acculin 22 (The Dow Chemical Company) can be used. Acrylic acid polymers are preferably used as water-soluble or water-dispersible salts, with a base such as an alkali metal hydroxide (potassium hydroxide, sodium hydroxide, etc.) used as a neutralizing agent.

[0013] Component (B) can be one or more types, and its content is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.04% by mass or more, preferably 2% by mass or less, more preferably 1.5% by mass or less, and even more preferably 1% by mass or less, from the viewpoint of suppressing foam collision and retaining carbon dioxide. Furthermore, the content of component (B) is preferably 0.01 to 2% by mass, more preferably 0.02 to 1.5% by mass, and even more preferably 0.04 to 1% by mass, in the stock solution.

[0014] Component (C) is a cationic polymer with a cation charge density of 5.0 meq / g or less. Such cationic polymers with a specific charge density are thought to form a structure called a polyion complex (hereinafter referred to as PIC) in an aerosol cosmetic by aggregating with the anionic polymer of component (B), which includes anionic surfactants of component (A), water, and other components (for example, polyhydric alcohols described later). It is presumed that PIC adsorbs to the bubble film of the ejected foam to stabilize the foam. Therefore, in an aerosol cosmetic containing PIC, the texture of the foam becomes uniform, the foam retention is good, and the foam with excellent massage persistence is provided. Further, when the skin is washed with the foam of an aerosol cosmetic containing PIC, it is presumed that the PIC remains on the skin even after rinsing, making the skin moist after washing. From the viewpoint that PIC adsorbs to the bubble film of the foam and forms a dense foam that can hold carbon dioxide gas, the charge density of component (C) is preferably 0.8 to 4 meq / g, more preferably 1 to 3.3 meq / g.

[0015] Here, the cation charge density indicates the ratio of the number of positive charges on the polymer to the molecular weight of the polymer (excluding the weight of the counterion of the cationic group). Multiplying the cation charge density by the polymer molecular weight gives the number of positively charged sites in a predetermined polymer chain. The cation charge density is further defined as the number of milliequivalents (meq / g) of positive charges (cationic nitrogen atoms) per gram of the polymer.

[0016] The value of the cation charge density of component (C) can be determined, for example, according to the following formula (1). Cation charge density (meq / g) = 1 ÷ (unit molecular weight containing one nitrogen atom having cationicity in the cationic polymer) × 1000 (1)

[0017] Also, as a method for measuring the cation charge density of component (C), there are a method of determining and calculating the nitrogen content derived from the quaternary nitrogen-containing group in the cationic polymer by the Kjeldahl method and a method by colloid titration using an aqueous solution of potassium polyvinyl sulfate. Either method can be used to obtain the result, but in the present invention, it is preferable to use the Kjeldahl method. For example, in the case of the Kjeldahl method, the method can be followed according to the 2006 Japanese Standards for Quasi-Drug Raw Materials, General Test Methods, Nitrogen Determination Method, Method 2. Specifically, 100 mg of purified and dried component (C) is accurately weighed, and 10 mL of sulfuric acid and 1 tablet of a decomposition accelerator (Nakayama Rika Seisakusho Co., Ltd., Keltab tablets) are added. Complete decomposition is carried out using a Kjeldahl decomposition apparatus (BUCHI, K-432) by sequentially raising the temperature to 250°C for 30 minutes, 300°C for 30 minutes, and 420°C for 80 minutes. After the decomposition reaction is complete, 30 mL of deionized water is added to the sample, and using an automatic Kjeldahl distillation and titration apparatus (BUCHI, K-370), 40 mL of 30% sodium hydroxide aqueous solution is added to make it alkaline. Then, the ammonia liberated by the distillation operation is collected in a 1% boric acid aqueous solution, and the nitrogen content (mass%) in component (C) is determined by titration with 0.01 N sulfuric acid (Wako Pure Chemical Industries, Ltd., for quantitative analysis).

[0018] Specific examples of component (C) include cationized guar gum; cationized tara gum; cationized locust bean gum; cationized polyvinyl alcohol; cationized cellulose; cationized hydroxyalkyl cellulose such as cationized hydroxyethyl cellulose and cationized hydroxypropyl cellulose; cationic starch; vinyl pyrrolidone / N,N-dimethylaminoethyl methacrylate diethyl sulfate copolymer; N,N-dimethylaminoethyl methacrylate diethyl sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer; polydiallyldimethylammonium chloride; diallyldimethylammonium chloride / acrylamide copolymer; hydroxyethyl cellulose / diallyldimethylammonium chloride copolymer; vinylimidazolium trichloride / vinyl pyrrolidone copolymer; vinyl pyrrolidone / alkylamino (meth)acrylate copolymer; vinyl pyrrolidone / alkylamino (meth)acrylate / vinyl caprolactam copolymer; vinyl pyrrolidone / (meth)acrylamide propyltrimethylammonium chloride copolymer; alkyl acrylamide / (meth)acrylate / alkylaminoalkyl acrylamide / polyethylene glycol (meth)acrylate copolymer; cationic polymers described in JP-A-53-139734 and JP-A-60-36407, and the like.

[0019] As the cationic polymer of component (C), for example, the following commercially available products can be used. (Cationized guar gum) Jaguar C-13S, Jaguar C-14S, Jaguar C-14SK, Jaguar C-17 (above, manufactured by Solvay Rhodia), etc. (Cationized tara gum) Katinal CTR-100 (manufactured by Toho Chemical Industry Co., Ltd.), etc. (Cationized hydroxyethyl cellulose) Polyquaternium-10 (o-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethylcellulose chloride): U-Care Polymer JR-400 (manufactured by Dow Chemical), Poise C-60H (manufactured by Kao Corporation), Poise C-150L (manufactured by Kao Corporation), Kachicello M-80 (manufactured by Kao Corporation), etc. (cationized hydroxypropylcellulose) Sofcare C-HP2 (manufactured by Kao Corporation), etc. (Cationized polyvinyl alcohol) CM318 (manufactured by Kuraray Co., Ltd.), etc. (Vinylpyrrolidone / N,N-dimethylaminoethyl methacrylate diethyl sulfate copolymer) Polyquaternium-11: Gafcut 755N (manufactured by ISP Japan Co., Ltd.), etc. (N,N-dimethylaminoethyl methacrylate diethyl sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer) Polyquaternium-52: Softcare KG-101W-E (manufactured by Kao Corporation), etc. (Diallyldimethylammonium chloride / acrylamide copolymer) Polyquaternium-7: MERQUAT550 (manufactured by Lubrizol Advanced Materials), etc. (Vinylimidazolium trichloride / vinylpyrrolidone copolymer) Polyquaternium-16: Rubicut FC370 (BASF), etc.

[0020] As for component (C), cationized hydroxyalkylcellulose, cationized guar gum, diallyldimethylammonium chloride / acrylamide copolymer, and N,N-dimethylaminoethyl methacrylate diethyl sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer are preferred from the viewpoint of having a uniform foam texture, good foam retention, and excellent massage sustainability, as PIC is adsorbed onto the foam film and creates a dense foam that can retain carbon dioxide.

[0021] Component (C) can be one or more types, and its content is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.04% by mass or more, preferably 3% by mass or less, more preferably 2% by mass or less, and even more preferably 1% by mass or less, from the viewpoint of ensuring that PIC is adsorbed onto the foam film of the foam and creates dense foam that can retain carbon dioxide, resulting in uniform foam texture, good foam retention, and excellent massage duration in the undiluted solution. Furthermore, the content of component (C) is preferably 0.01 to 3% by mass, more preferably 0.02 to 2% by mass, and even more preferably 0.04 to 1% by mass in the undiluted solution.

[0022] In the present invention, the mass ratio of component (A) to the total amount of components (B) and (C), (A) / ((B)+(C)), is 6 or more, preferably 7 or more, more preferably 8 or more, preferably 250 or less, more preferably 220 or less, even more preferably 50 or less, and even more preferably 30 or less, from the viewpoint of ensuring that the dispensed foam has a uniform texture, good foam retention, and excellent massage duration. Furthermore, from the viewpoint of ensuring that the skin remains moisturized after washing, it is 6 or more, preferably 7 or more, more preferably 8 or more, preferably 250 or less, more preferably 220 or less, even more preferably 50 or less, and even more preferably 30 or less.

[0023] In the present invention, the mass ratio (B) / (C) of component (B) to component (C) is preferably 0.2 or higher, more preferably 0.4 or higher, even more preferably 0.6 or higher, even more preferably 0.8 or higher, preferably 4 or lower, even more preferably 3 or lower, even more preferably 2 or lower, and even more preferably 1.5 or lower. Furthermore, the mass ratio (B) / (C) of component (B) to component (C) is preferably 0.2 to 4, more preferably 0.4 to 3, even more preferably 0.6 to 2, and even more preferably 0.8 to 1.5.

[0024] The aerosol cosmetic composition of the present invention may further contain a polyhydric alcohol in the undiluted solution, resulting in good foam retention and superior feel after application. A polyhydric alcohol is a compound having two or more hydroxyl groups in its molecule. Examples of dihydric alcohols include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, 1,3-butylene glycol, and 1,3-propanediol. Examples of trihydric alcohols include glycerin and trimethylolpropane. Examples of tetrahydric alcohols include diglycerin and erythritol. Examples of pentahydric or higher polyhydric alcohols include polyglycerins such as triglycerin; sugars and sugar alcohols such as glucose, maltose, maltodose, sucrose, xylitol, sorbitol, malbitol, polyoxyethylene methyl glucoside, polyoxyethylene ethyl glucoside, and polyoxyethylene propylene glucoside. Of these, it is preferable to include one or more selected from 1,3-butylene glycol and polyoxyethylene methyl glucoside, from the viewpoint of uniform foam texture, good foam retention, and excellent massage duration.

[0025] One or more types of polyhydric alcohols can be used. From the viewpoint of good foam retention and excellent feel after application, the content is preferably 0.5% by mass or more in the undiluted solution, more preferably 1% by mass or more, even more preferably 3% by mass or more, preferably 40% by mass or less, more preferably 30% by mass or less, and even more preferably 20% by mass or less. Furthermore, the polyhydric alcohol content is preferably 0.5 to 40% by mass in the undiluted solution, more preferably 1 to 30% by mass, and even more preferably 3 to 20% by mass.

[0026] The aerosol cosmetic composition of the present invention further contains water in the stock solution. The water acts as a solvent in the stock solution and constitutes the remainder of the other components. From the viewpoint of improving foam retention and providing excellent usability, the water content in the stock solution is preferably 30 to 85% by mass, more preferably 40 to 80% by mass, and even more preferably 50 to 75% by mass.

[0027] In the aerosol cosmetic composition of the present invention, the stock solution may further contain ingredients commonly used in cosmetics, such as surfactants other than ingredient (A), oil components, ethanol, preservatives, antioxidants, pigments, pH adjusters, fragrances, UV absorbers, moisturizers, blood circulation promoters, cooling agents, antiperspirants, bactericides, whitening agents, anti-inflammatory agents, skin activators, and the like.

[0028] In the aerosol cosmetic composition of the present invention, the stock solution is prepared by mixing the above components (A), (B), and (C) and other components. From the viewpoint of having an appropriate viscosity that provides excellent foam massage properties, the viscosity of the stock solution at 25°C is preferably 400 to 10000 mPa·s, more preferably 500 to 8500 mPa·s, and even more preferably 500 to 7000 mPa·s. Here, viscosity was measured using a BM viscometer (manufactured by Toki Sangyo Co., Ltd.) at rotor No. 3, 12 rpm, and 1 minute. If the viscosity exceeded 9000 mPa·s, it was measured at rotor No. 4, 12 rpm, and 1 minute. If the viscosity fell below 100 mPa·s, it was measured at rotor No. 2, 100 rpm, and 1 minute.

[0029] The aerosol cosmetic of the present invention can be manufactured by filling a pressure-resistant container with the stock solution described above and (D) carbon dioxide. The preferred form of spraying is a foam type, where the product is dispensed as a foam. The mass ratio of the undiluted solution to carbon dioxide is preferably 94:6 to 99.5:0.5, more preferably 95:5 to 99:1, and even more preferably 96.5:3.5 to 98.5:1.5, from the viewpoint of excellent carbon dioxide bubble generation and sustained moisturizing effect on the skin after application.

[0030] The aerosol cosmetic composition of the present invention may contain, in addition to the carbon dioxide gas of component (D), a propellant commonly used in aerosol cosmetics. Examples of propellants include liquefied petroleum gas and compressed gas. When a propellant other than carbon dioxide is included, the carbon dioxide content relative to the total amount of carbon dioxide gas and propellant is preferably 85% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, and even more preferably 98% by mass or more. In the present invention, it is preferable that the propellant does not contain any propellant other than carbon dioxide, or, if it contains a propellant other than carbon dioxide, that the carbon dioxide content relative to the total amount of propellant is 85% by mass or more.

[0031] The aerosol cosmetic composition of the present invention can be applied as a cosmetic composition without particular limitations, but it is particularly suitable as a skin cosmetic composition because the volatilization of carbon dioxide in the cosmetic composition after spraying is suppressed, the carbon dioxide concentration is high, and the effect of carbon dioxide acting on the skin after application is high. The aerosol cosmetic composition of the present invention can be used in various ways depending on the application situation, such as applying it to the skin, leaving it for a certain period of time, allowing it to blend into the skin, massaging it, wiping it off, or washing it off.

[0032] The aerosol cosmetic composition of the present invention can be manufactured by conventional methods. For example, the aerosol cosmetic composition can be manufactured by the following steps 1 to 3. Step 1: A step in which the components containing components (A) and (B) (the stock solution components other than component (C)) are dispersed in a disperser, and then heated to 50°C or higher and mixed. Step 2: Next, component (C) is added and mixed using a propeller to prepare the stock solution. Step 3: After cooling the stock solution obtained in Step 2 to 15-30°C, the solution is filled into a pressure-resistant container, sealed, and then filled with component (D) by pressurizing it. Thus, when preparing the stock solution, it is thought that adding the cationic polymer of component (C) after neutralizing the anionic polymer of component (B) tends to result in smaller PICs. This leads to a more uniform foam texture and improved foam retention.

[0033] With regard to the embodiments described above, the present invention further discloses the following compositions, etc.

[0034] <1> The following components (A), (B), and (C): (A) Anionic surfactant, (B) Anionic polymer, (C) Cationic polymers with a cation charge density of 5.0 meq / g or less A stock solution containing the above, wherein the mass ratio of component (A) to the total amount of components (B) and (C) (A) / ((B)+(C)) is 6 or more, and (D) Carbon dioxide Aerosol cosmetic containing [a specific ingredient].

[0035] <2> Component (A) is preferably polyoxyethylene alkyl ether sulfate or a salt thereof, N-C12-C22 acyl glutamic acid or a salt thereof, and more preferably polyoxyethylene lauryl ether sulfate or a salt thereof, N-coconut oil fatty acid acyl glutamic acid or a salt thereof, as described above. <1> The aerosol cosmetic product described above. <3> The content of component (A) is preferably 1% by mass or more in the stock solution, more preferably 3% by mass or more, even more preferably 5% by mass or more, preferably 40% by mass or less, more preferably 25% by mass or less, and even more preferably 15% by mass or less. <1> or <2> The aerosol cosmetic product described above.

[0036] <4> Component (B) is preferably an acrylic acid polymer, more preferably an acrylic acid / (meth)acrylate alkyl copolymer, a carboxyvinyl polymer, or a polyoxyethylene alkyl ether modified acrylic acid copolymer, and even more preferably contains at least one selected from (acrylic acid / (meth)acrylate alkyl (C10-30)) copolymer, carboxyvinyl polymer, and (acrylates / methacrylate steareth-20) copolymer. <1> ~ <3> Aerosol cosmetic as described in any one of the following. <5> The content of component (B) is preferably 0.01% by mass or more in the stock solution, more preferably 0.02% by mass or more, even more preferably 0.04% by mass or more, preferably 2% by mass or less, more preferably 1.5% by mass or less, and even more preferably 1% by mass or less. <1> ~ <4> Aerosol cosmetic as described in any one of the following.

[0037] <6> Component (C) preferably has a cation charge density of 0.8 to 4 meq / g, and more preferably 1 to 3.3 meq / g. <1> ~ <5> Aerosol cosmetic as described in any one of the following. <7> Component (C) is preferably one or more selected from cationized hydroxyalkylcellulose, cationized guar gum, diallyldimethylammonium chloride / acrylamide copolymer, and N,N-dimethylaminoethyl methacrylate diethyl sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer, the above <1> ~ <6> Aerosol cosmetic as described in any one of the following. <8> The content of component (C) is preferably 0.01% by mass or more in the stock solution, more preferably 0.02% by mass or more, even more preferably 0.04% by mass or more, preferably 3% by mass or less, more preferably 2% by mass or less, and even more preferably 1% by mass or less. <1> ~ <7> Aerosol cosmetic as described in any one of the following.

[0038] <9> The mass ratio of component (A) to the total amount of components (B) and (C), (A) / ((B)+(C)), is preferably 7 or more, more preferably 8 or more, preferably 250 or less, more preferably 220 or less, even more preferably 50 or less, and even more preferably 30 or less. <1> ~ <8> Aerosol cosmetic as described in any one of the following. <10> The mass ratio (B) / (C) of component (B) to component (C) is preferably 0.2 or more, more preferably 0.4 or more, even more preferably 0.6 or more, even more preferably 0.8 or more, preferably 4 or less, more preferably 3 or less, even more preferably 2 or less, and even more preferably 1.5 or less. <1> ~ <9> Aerosol cosmetic as described in any one of the following.

[0039] <11> Preferably, the stock solution further contains a polyhydric alcohol. <1> ~ <10> Aerosol cosmetic as described in any one of the following. <12> The polyhydric alcohol is preferably one or more selected from 1,3-butylene glycol and polyoxyethylene methyl glucoside. <11> The aerosol cosmetic product described above. <13> The polyhydric alcohol content is preferably 0.5% by mass or more in the stock solution, more preferably 1% by mass or more, even more preferably 3% by mass or more, preferably 40% by mass or less, more preferably 30% by mass or less, and even more preferably 20% by mass or less. <11> or <12> The aerosol cosmetic product described above.

[0040] <14> The water content in the stock solution is preferably 30 to 85% by mass, more preferably 40 to 80% by mass, and even more preferably 50 to 75% by mass. <1> ~ <13> Aerosol cosmetic as described in any one of the following. <15> The undiluted solution has a viscosity at 25°C that is preferably 400 to 10000 mPa·s, more preferably 500 to 8500 mPa·s, and even more preferably 500 to 7000 mPa·s. <1> ~ <14> Aerosol cosmetic as described in any one of the following.

[0041] <16> The product is manufactured by filling a pressure-resistant container with the stock solution and (D) carbon dioxide, wherein the mass ratio of the stock solution to carbon dioxide is preferably 94:6 to 99.5:0.5, more preferably 95:5 to 99:1, and even more preferably 96.5:3.5 to 98.5:1.5. <1> ~ <15> Aerosol cosmetic as described in any one of the following. <17> Preferably, the propellant does not contain any propellant other than carbon dioxide, or, if it contains a propellant other than carbon dioxide, the carbon dioxide content relative to the total amount of propellant is 85% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, and even more preferably 98% by mass or more. <1> ~ <16> Aerosol cosmetic as described in any one of the following. <18> Preferably, the spraying method is a foam type that is dispensed in a foamy form. <1> ~ <17> Aerosol cosmetic as described in any one of the following. <19> The above is a skin cosmetic. <1> ~ <18> Aerosol cosmetic as described in any one of the following. <20> The product is applied to the skin, left for a certain period of time, allowed to absorb into the skin, massaged, wiped off, or washed away. <1> ~ <19> Aerosol cosmetic as described in any one of the following.

[0042] <21> Steps 1-3 below: Step 1: A step of stirring the components (A) and (B) and heating them to 50°C or higher to mix them. Step 2: Next, add component (C), stir and mix to prepare the stock solution. Step 3: After cooling the stock solution obtained in Step 2, fill it into a pressure-resistant container, seal it, and then fill it by pressurizing it with component (D). The above, characterized by including <1> ~ <20> A method for producing an aerosol cosmetic according to any one of the following. [Examples]

[0043] Examples 1-8 and Comparative Examples 1-3 Aerosol cosmetics with the compositions shown in Table 1 were manufactured, and the particle size of the dispensed foam was measured. The uniformity of the foam texture, foam retention (massage duration), and the duration of the moisturizing effect after washing (Δmoisture content) were also evaluated. The results are shown in Table 1.

[0044] (Manufacturing method) Step 1: Disperse the components (A) and (B) using a disperser, then heat to 60°C to 70°C and mix. Step 2: Next, add component (C) and mix using a propeller to prepare the stock solution. Step 3: After cooling the stock solution obtained in Step 2 to 15-30°C, it was filled into a pressure-resistant container, sealed, and then filled with component (D) under pressure to obtain an aerosol cosmetic. 2.1 parts by mass of carbon dioxide were added to 97.9 parts by mass of the stock solution. (Stock solution:Carbon dioxide = 97.9:2.1)

[0045] (Evaluation method) (1) Bubble particle size / standard deviation (μm): Dispense foam from each cosmetic onto a microscope slide, gently place a cover glass on top without pressing down, and photograph the foam 10 seconds after dispensing using a digital microscope (KH-8700 HYROX, 100x magnification). Measure the diameter of all bubbles in a 500 μm diameter area near the center of the resulting image. If the number of bubbles in that area is less than 50, measure the bubbles adjacent to that area until the total reaches 50. The results are shown in terms of average particle size and standard deviation.

[0046] (2) Uniformity of foam texture: Foam of each cosmetic was dispensed onto a microscope slide, and a cover slip was gently placed on top without pressing down. A photograph of the foam 10 seconds after dispensing was taken using a digital microscope (HYROX KH-8700, 100x magnification). The resulting images were visually evaluated by a specialist on a five-point scale as follows. 5; The bubbles are uniform in size. 4; The bubbles are fairly uniform in size. 3; The size of the bubbles is somewhat uneven. 2; The size of the bubbles is uneven. 1; The size of the bubbles is quite uneven.

[0047] (3) Foam retention (massage duration): Expert evaluators dispensed the foam of each cosmetic product onto the back of their hand, and after spreading it in a circular motion with their fingertips for 5 seconds, they evaluated the thickness of the foam on the following 5-point scale. 5; The foam has a good thickness, allowing for a thorough massage. 4. The foam has a thickness that allows for massage. 3; The foam has a thickness that allows for a slight massage. 2; The foam is too thick to provide a good massage. 1. The foam is too thick to be used for massage.

[0048] (4) Duration of moisturizing effect after washing (Δmoisture content): The moisture content of the forearm was measured five times using a Corneometer CM825 (manufactured by Courage+Khazaka electronic GmbH) and the average value was calculated. The foam of each cosmetic product was dispensed onto the measurement site, massaged for 5 seconds, rinsed with tap water, and dried with a towel. Fifteen minutes after washing, the moisture content of the forearm was measured again five times using the Corneometer and the average value was calculated. The results show the moisture content before and after washing, and the difference between them (ΔMoisture content; moisture content 15 minutes after washing - moisture content before washing).

[0049] [Table 1]

[0050] Example 9 Aerosol cosmetics with the compositions shown in Table 2 were prepared in the same manner as in Examples 1 to 8. The resulting aerosol cosmetic has a uniform foam texture, good foam retention, and excellent massage-like properties. Furthermore, it leaves the skin feeling moisturized for a long time after washing.

[0051] [Table 2]

[0052] Examples 10-17 and Comparative Example 4 Aerosol cosmetics with the compositions shown in Table 3 were manufactured in the same manner as in Examples 1 to 9. The particle size of the dispensed foam was measured, and the uniformity of the foam texture, foam retention (massage duration), and the duration of the moisturizing effect after washing (Δmoisture content) were evaluated. The results are also shown in Table 3.

[0053] [Table 3]

Claims

1. The following components (A), (B) and (C): (A) an anionic surfactant, (B) an anionic polymer, (C) A cationic polymer having a cationic charge density of 5.0 meq / g or less. wherein the mass ratio (A) / ((B)+(C)) of component (A) to the total amount of components (B) and (C) is 6 or more; and (D) Carbon dioxide An aerosol cosmetic comprising:

2. 2. The aerosol cosmetic according to claim 1, wherein the component (B) is an acrylic acid-based polymer.

3. 3. The aerosol cosmetic preparation according to claim 1 or 2, wherein component (C) is at least one member selected from the group consisting of cationized hydroxyalkyl cellulose, diallyldimethylammonium chloride / acrylamide copolymer, N,N-dimethylaminoethyl diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer, and cationized guar gum.

4. 3. The aerosol cosmetic preparation according to claim 1, wherein the mass ratio (B) / (C) of component (B) to component (C) is 0.2 to 4.

5. 3. The aerosol cosmetic preparation according to claim 1, wherein the mass ratio of the concentrate to carbon dioxide gas is 94:6 to 99.5:0.

5.

6. 3. The aerosol cosmetic preparation according to claim 1 or 2, which does not contain any propellant other than carbon dioxide gas, or, if it contains a propellant other than carbon dioxide gas, the content of carbon dioxide gas relative to the total amount of the propellants is 85 mass% or more.

7. The following steps 1 to 3: Step 1: A step of stirring and mixing the components including the components (A) and (B) by heating to 50° C. or higher; Step 2: Next, a step of adding component (C) and stirring to prepare a stock solution; Step 3: After cooling the stock solution obtained in step 2, the stock solution is filled into a pressure-resistant container, sealed, and then filled with component (D) by pressurization. The method for producing the aerosol cosmetic according to claim 1 or 2, comprising: