Aerosol cosmetic

Abstract

This invention relates to an aerosol cosmetic comprising: a stock solution containing the following components (A), (B) and (C): (A) an anionic surfactant; (B) an anionic polymer; (C) a cationic polymer with a cationic charge density of 5.0 meq / g or less, wherein the mass ratio of component (A) to the total mass of components (B) and (C) (A) / ((B)+(C))) is 6 or more; and (D) carbon dioxide.

Description

Technical Field

[0001] This invention relates to an aerosol cosmetic. Background Technology

[0002] Dark circles, dullness, and other skin problems are caused by decreased blood flow. To improve these conditions, cosmetics that utilize the effects of carbon dioxide are being researched.

[0003] For example, Patent Document 1 describes a foam-like skin application containing N-acyl amino acids or their salts, (meth)acrylic acid polymers, polysaccharide polymers, carbon dioxide, and hydrocarbons with 3 to 5 carbon atoms. Patent Document 2 describes a foam-like skin application containing specific surfactants, (meth)acrylic acid polymers, polysaccharide polymers, carbon dioxide, and hydrocarbons with 3 to 5 carbon atoms, both of which have good blood circulation promoting effects.

[0004] (Patent Document 1) Japanese Patent Application Publication No. 2010-248098

[0005] (Patent Document 2) Japanese Patent Application Publication No. 2011-84490 Summary of the Invention

[0006] This invention relates to an aerosol cosmetic, which contains:

[0007] The stock solution contains the following components (A), (B) and (C):

[0008] (A) Anionic surfactants;

[0009] (B) Anionic polymers;

[0010] (C) Cationic polymers with a cationic charge density of less than 5.0 meq / g.

[0011] The mass ratio of component (A) to the total mass of components (B) and (C) (A) / ((B)+(C))) is 6 or more; and

[0012] (D) Carbon dioxide.

[0013] Furthermore, the present invention relates to a method for manufacturing the aforementioned aerosol cosmetic, which includes the following steps 1 to 3:

[0014] Process 1: The process of stirring, heating to above 50°C, and mixing components (A) and (B);

[0015] Step 2: Next, add component (C), stir and mix to prepare the stock solution;

[0016] Step 3: After cooling the stock solution obtained in Step 2, fill it into a pressure-resistant container, seal it, and then pressurize and fill it with component (D). Detailed Implementation

[0017] Existing carbon dioxide-containing aerosol cosmetics produce foams with uneven texture, poor foam retention, and problems with the duration of massage effects.

[0018] The inventors have discovered that by using anionic surfactants in a specific ratio relative to anionic polymers and cationic polymers with a specific charge density, aerosol cosmetics with uniform foam texture, good foam retention, and excellent massage duration can be obtained.

[0019] The aerosol cosmetic of this invention produces foam with a uniform texture, good foam retention, and excellent massage effect. Furthermore, the skin remains moisturized after cleansing.

[0020] The anionic surfactant used as component (A) in this invention is an anionic surfactant commonly used in cosmetics. Examples include fatty acids with 12 to 22 carbon atoms, such as sodium lauryl sulfate, potassium palmitate, and stearic acid arginine, or their salts; alkyl sulfates with 12 to 22 carbon atoms, such as sodium lauryl sulfate and potassium lauryl sulfate, or their salts; polyoxyethylene alkyl ether sulfates, such as sodium lauryl sulfate, or their salts; and polyoxyethylene oil-based ether phosphates, polyoxyethylene stearyl ether phosphates, and polyoxyethylene lauryl ether phosphates, or their salts. Polyoxyethylene alkyl ether phosphate or its salts; dialkyl sulfosuccinic acid or its salts with 12 to 24 carbon atoms, such as sodium di(2-ethylhexyl)sulfosuccinate; N-alkyl methyl taurate or its salts with 12 to 22 carbon atoms, such as sodium N-stearoyl-N-methyl taurate; acyl glutamate or its salts with 12 to 22 N-carbon atoms, such as sodium dilauroyl glutamate, monosodium N-lauroyl glutamate, sodium N-stearoyl-L-glutamate, arginine N-stearoyl-L-glutamate, sodium N-stearoyl glutamate, sodium N-myristoyl-L-glutamate, etc. Among these, from the viewpoint of producing fine foam and improving foam retention during carbon dioxide emission, polyoxyethylene alkyl ether sulfuric acid or its salts, acyl glutamate or its salts with 12 to 22 N-carbon atoms are preferred, and polyoxyethylene lauryl ether sulfuric acid or its salts, acyl glutamate of N-coconut oil fatty acid or its salts are more preferred.

[0021] Examples of salts that can be used for these purposes 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; tris(hydroxymethyl)aminomethane; basic amino acids such as L-arginine, with sodium being the preferred choice.

[0022] The anionic surfactant in component (A) may be one or more in combination. From the viewpoint of producing fine foam and improving foam retention during carbon dioxide emission, the content in the stock solution is preferably 1% by mass or more, more preferably 3% by mass or more, further preferably 5% by mass or more, preferably 40% by mass or less, more preferably 25% by mass or less, and further preferably 15% by mass or less. Furthermore, the content of component (A) in the stock solution is preferably 1 to 40% by mass, more preferably 3 to 25% by mass, and further preferably 5 to 15% by mass.

[0023] The anionic polymer of component (B) can be any commonly used in cosmetics, such as: polyacrylic acid, polymethacrylic acid, acrylic / (meth)acrylic acid alkyl ester copolymer, carboxyvinyl polymer, polyoxyethylene alkyl ether modified acrylic copolymer, etc.; carboxymethyl cellulose, carrageenan, xanthan gum, polystyrene sulfonate, agar, solanum, ebony gum, pectin, alginate, hyaluronic acid or its alkali metal salts, etc.

[0024] From the viewpoint of suppressing foam collisions and retaining carbon dioxide, acrylic polymers are preferred, more preferably acrylic / (meth)acrylate alkyl ester copolymers, carboxyvinyl polymers, polyoxyethylene alkyl ether modified acrylic copolymers, and even more preferably containing at least one selected from (acrylic / (meth)acrylate alkyl (C10-30) ester) copolymers, carboxyvinyl polymers, and (acrylate / stearyl methacrylate-20) copolymers.

[0025] Here, the (acrylate / (meth)acrylate alkyl (C10-30) ester) copolymer is a copolymer of C10-30 alkyl acrylate with acrylic acid, methacrylic acid, or lower alkyl esters thereof, and is crosslinked with allyl ether of sucrose or allyl ether of pentaerythritol. Commercially available products such as PEMULEN TR-1, PEMULEN TR-2, CARBOPOL ETD2020, CARBOPOL 1342, and CARBOPOL 1382 (all from Lubrizol Advanced Materials Inc.) can be used. Alternatively, commercially available products such as ACULYN 22 (The Dow Chemical Company) can be used as the (acrylate / methacrylic acid stearyl alcohol polyether-20) copolymer.

[0026] Acrylic polymers preferably use alkali metal hydroxides such as potassium hydroxide and sodium hydroxide as neutralizing agents, and are used as water-soluble or water-dispersible salts.

[0027] Component (B) may be one or more, and its content in the stock solution is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, and 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) in the stock solution 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.

[0028] Component (C) is a cationic polymer with a cationic charge density of less than 5.0 meq / g.

[0029] Such cationic polymers with specific charge densities are believed to condense with anionic polymers of component (B) to form a polyionic complex (hereinafter referred to as "PIC") structure in aerosol cosmetics containing anionic surfactants of component (A), or water, and other components (such as polyols described later). Because PIC adsorbs onto the foam film of the expelled foam, stabilizing it, it is speculated that aerosol cosmetics containing PIC can provide foams with uniform texture, good foam retention, and excellent massage duration. Furthermore, when using foam from aerosol cosmetics containing PIC to cleanse the skin, PIC remains on the skin after rinsing, suggesting that the skin is moisturized after cleansing.

[0030] From the viewpoint that PIC is adsorbed onto the foam film to generate dense foam that can retain carbon dioxide, the charge density of component (C) is preferably 0.8 to 4 meq / g, more preferably 1 to 3.3 meq / g.

[0031] Here, cationic charge density represents the ratio of the number of positive charges on the polymer to the molecular weight of the polymer (excluding the weight of the counterions of the cationic groups). Multiplying the cationic charge density by the polymer molecular weight yields the number of positively charged sites in a given polymer chain. Cationic charge density is further defined as the milliequivalents (meq / g) of positive charge (cationic nitrogen atoms) per gram of polymer.

[0032] The value of the cation charge density of component (C) can be obtained, for example, by the following equation (1).

[0033] Cationic charge density (meq / g) = 1 ÷ (molecular weight of a unit containing one cationic nitrogen atom in a cationic polymer) × 1000 (1)

[0034] Furthermore, as a method for determining the cationic charge density of component (C), there are methods that use the Kjeldahl method to obtain and calculate the nitrogen content derived from quaternary nitrogen groups in the cationic polymer, and methods that use colloidal titration with an aqueous solution of potassium polyvinyl sulfate. It can be obtained by either method, but in this invention, the Kjeldahl method is preferred.

[0035] For example, when using the Kjeldahl method, one can follow the standards of quasi-drug raw materials 2006, general test methods, nitrogen quantification method, and method 2. Specifically, accurately weigh 100 mg of purified and dried component (C), add 10 mL of sulfuric acid and 1 tablet of decomposition accelerator (manufactured by Nakayama Rika Seisakusho KK, KJELTABS tablet), and use a Kjeldahl decomposition apparatus (manufactured by BUCHI Corporation, K-432) to carry out complete decomposition while sequentially increasing the temperature at 250°C for 30 minutes, 300°C for 30 minutes, and 420°C for 80 minutes. After the decomposition reaction was completed, 30 mL of ion-exchanged water was added to the sample. Using an automatic Kjeldahl distillation and titration apparatus (BUCHI K-370), 40 mL of 30% sodium hydroxide aqueous solution was added to make it alkaline. The ammonia released due to the distillation operation was collected in 1% boric acid aqueous solution and titrated with 0.01N sulfuric acid (Wako Pure Chemical Industries Co., Ltd., for quantitative analysis) to determine the nitrogen content (mass%) in component (C).

[0036] Specific examples of component (C) include: cationic guar gum; cationic tara gum; cationic locust bean gum; cationic polyvinyl alcohol; cationic cellulose; cationic hydroxyethyl cellulose, cationic hydroxypropyl cellulose, and other cationic hydroxyalkyl celluloses; cationic starch; vinylpyrrolidone / N,N-dimethylaminoethyl methacrylate diethyl methacrylate sulfate copolymer; N,N-dimethylaminoethyl methacrylate diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer; polydiallyl dimethyl ammonium chloride; diallyl dimethyl ammonium chloride / acrylamide copolymer; Hydroxyethyl cellulose / diallyl dimethyl ammonium chloride copolymer; trichlorovinylimidazolium / vinylpyrrolidone copolymer; vinylpyrrolidone / alkylamino(meth)acrylate copolymer; vinylpyrrolidone / alkylamino(meth)acrylate / vinylcaprolactam copolymer; vinylpyrrolidone / (meth)acrylamide propyltrimethylammonium chloride copolymer; alkylacrylamide / (meth)acrylate / alkylaminoalkylacrylamide / polyethylene glycol (meth)acrylate copolymer; cationic polymers described in Japanese Patent Application Publication Nos. 53-139734 and 60-36407, etc.

[0037] The cationic polymer used as component (C) may be, for example, the commercially available products described below.

[0038] (Cationatized guar gum)

[0039] JAGUAR C-13S, JAGUAR C-14S, JAGUAR C-14SK, JAGUAR C-17 (all manufactured by Solvay Rhodia), etc.

[0040] (Cation-modified Tara gel)

[0041] CATINAL CTR-100 (manufactured by Toho Chemical Industry Co., Ltd.), etc.

[0042] (Cation-modified hydroxyethyl cellulose)

[0043] Polyquaternium-10 (chloro-o-[2-hydroxy-3-(trimethylammonium)propyl]hydroxyethyl cellulose): UCarePolymer JR-400 (manufactured by The Dow Chemical Company), POIZ C-60H (manufactured by Kao Corporation), POIZ C-150L (manufactured by Kao Corporation), CATICELLO M-80 (manufactured by Kao Corporation), etc.

[0044] (Cation-modified hydroxypropyl cellulose)

[0045] Sofcare C-HP2 (made by Kao Corporation), etc.

[0046] (Cation-modified polyvinyl alcohol)

[0047] CM318 (manufactured by KURARAY Co., Ltd.) etc.

[0048] (Vinylpyrrolidone / N,N-Dimethylaminoethyl methacrylate diethyl methacrylate sulfate copolymer)

[0049] Polyquaternium-11: GAFQUAT 755N (manufactured by ISP Japan Ltd.), etc.

[0050] (N,N-Dimethylaminoethyl methacrylate diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer)

[0051] Polyquaternium-52: Sofcare KG-101W-E (manufactured by Kao Corporation), etc.

[0052] (Diallyl dimethylammonium chloride / acrylamide copolymer)

[0053] Polyquaternium-7: MERQUAT550 (manufactured by Lubrizol Advanced Materials Inc.) etc. (trichlorovinylimidazolium / vinylpyrrolidone copolymer)

[0054] Polyquaternium-16: LUVIQUAT FC370 (manufactured by BASF), etc.

[0055] As component (C), from the viewpoint that the PIC is adsorbed onto the foam film to generate dense foam that can retain carbon dioxide, thereby resulting in a foam with uniform texture, good foam retention, and excellent massage duration, the preferred ingredients are cationic hydroxyalkyl cellulose, cationic guar gum, diallyl dimethyl ammonium chloride / acrylamide copolymer, and N,N-dimethylaminoethyl methacrylate diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer.

[0056] Component (C) may be one or more, and its content in the stock solution is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, and 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 that it can be adsorbed onto the foam film of the foam by PIC to generate dense foam that can retain carbon dioxide, thereby resulting in foam with uniform texture, good foam retention, and excellent massage duration. Furthermore, the content of component (C) in the stock solution 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.

[0057] In this invention, the mass ratio of component (A) to the total amount of components (B) and (C), (A) / ((B)+(C)), is preferably 6 or more, more preferably 7 or more, and even 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 that the produced foam has a uniform texture, good foam retention, excellent massage duration, and a lasting feeling of moisture on the skin after cleansing. Furthermore, the mass ratio of component (A) to the total amount of components (B) and (C), (A) / ((B)+(C)), is 6 or more, preferably 6 to 250, more preferably 7 to 220, even more preferably 7 to 50, and even more preferably 8 to 30.

[0058] In this invention, the mass ratio (B) / (C) of component (B) relative to component (C) is preferably 0.2 or more, more preferably 0.4 or more, further preferably 0.6 or more, further more preferably 0.8 or more, preferably 4 or less, more preferably 3 or less, further preferably 2 or less, and further more preferably 1.5 or less, from the viewpoint that the produced foam has a uniform texture, good foam retention, excellent massage duration, and a lasting feeling of moisture on the skin after cleansing. Furthermore, the mass ratio (B) / (C) of component (B) relative to component (C) is preferably 0.2 to 4, more preferably 0.4 to 3, further preferably 0.6 to 2, and further more preferably 0.8 to 1.5.

[0059] The aerosol cosmetic of the present invention can further contain polyols in the stock solution, thereby achieving good foam retention and an excellent user experience after application. Polyols are compounds having two or more hydroxyl groups within their molecules.

[0060] Examples of diols include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, 1,3-butanediol, and 1,3-propanediol. Examples of triols include glycerol and trimethylolpropane. Examples of tetraols include diglycerol and erythritol. Examples of polyols with five or more nucleotides include polyglycerols such as triglycerides; and sugars and sugar alcohols such as glucose, maltose, reduced maltose, sucrose, xylitol, sorbitol, maltitol, polyoxyethylene methyl glucoside, polyoxyethylene ethyl glucoside, and polyoxyethylene propylene glucoside.

[0061] From the viewpoint of producing foam with uniform texture, good foam retention, and excellent massage duration, it is preferable to contain one or more of the following: 1,3-butanediol and polyoxyethylene methyl glucoside.

[0062] One or more polyols may be used. From the viewpoint of good foam retention and excellent user experience after coating, the content in the stock solution is preferably 0.5% by mass or more, more preferably 1% by mass or more, further preferably 3% by mass or more, preferably 40% by mass or less, more preferably 30% by mass or less, and further preferably 20% by mass or less. Furthermore, the content of the polyol in the stock solution is preferably 0.5 to 40% by mass, more preferably 1 to 30% by mass, and further preferably 3 to 20% by mass.

[0063] The aerosol cosmetic of the present invention further contains water in the concentrate. Water acts as a solvent in the concentrate, becoming the remainder of the other ingredients. From the viewpoint of improving foam retention and providing an excellent user experience, the water content in the concentrate is preferably 30-85% by mass, more preferably 40-80% by mass, and even more preferably 50-75% by mass.

[0064] In the aerosol cosmetic 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, ultraviolet absorbers, moisturizers, blood circulation promoters, cooling agents, antiperspirants, bactericides, whitening agents, anti-inflammatory agents, skin activators, etc.

[0065] In the aerosol cosmetic of the present invention, the stock solution is prepared by mixing the above-mentioned components (A), (B), and (C) with other components. From the viewpoint of having an appropriate viscosity that provides excellent massage properties for the foam, 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.

[0066] 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 9000 mPa·s, the measurement is performed with rotor No. 4, 12 rpm, and 1 minute. When the viscosity is below 100 mPa·s, the measurement is performed with rotor No. 2, 100 rpm, and 1 minute.

[0067] The aerosol cosmetic of the present invention can be manufactured by filling a pressure-resistant container with the stock solution as described above and (D) carbon dioxide. As for its spraying form, a foam type that is expelled in a foam-like manner is preferred.

[0068] From the viewpoint of excellent foam generation and sustained skin hydration after application, the mass ratio of the concentrate 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.

[0069] In addition to carbon dioxide in component (D), the aerosol cosmetic of the present invention may also contain 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 mass of carbon dioxide and propellant is preferably 85% by mass or more, more preferably 90% by mass or more, further preferably 95% by mass or more, and even more preferably 98% by mass or more.

[0070] In this invention, it is preferable that the propellant does not contain carbon dioxide, or when the propellant contains carbon dioxide, the carbon dioxide content relative to the total amount of the propellant is preferably 85% by mass or more.

[0071] The aerosol cosmetic of the present invention can be used as a cosmetic without particular limitations, but it is preferred as a skin cosmetic because it inhibits the volatilization of carbon dioxide in the cosmetic after spraying, has a high carbon dioxide concentration, and has a high effect of carbon dioxide action after being applied to the skin.

[0072] The aerosol cosmetic of the present invention can be applied to the skin, left for a certain period of time to allow it to blend with the skin, massaged, and then wiped off or rinsed off, depending on the occasion.

[0073] The aerosol cosmetic of the present invention can be manufactured by conventional methods, for example, by including the following steps 1 to 3.

[0074] Step 1: The process of dispersing the components (A) and (B) (excluding the stock solution components (C)) using a disperser, heating them to above 50°C and mixing them.

[0075] Step 2: Next, add ingredient (C), mix using a propeller, and prepare the stock solution.

[0076] Step 3: After cooling the stock solution obtained in Step 2 to 15-30°C, fill it into a pressure-resistant container, seal it, and then pressurize and fill it with component (D).

[0077] Therefore, when preparing the stock solution, it is believed that after neutralizing the anionic polymer of component (B), the added cationic polymer of component (C) will make the resulting foam PIC smaller. As a result, the foam texture is uniform and the foam holding power is improved.

[0078] In conjunction with the above-described embodiments, the present invention further discloses the following compositions, etc.

[0079] <1> An aerosol cosmetic, comprising:

[0080] The stock solution contains the following components (A), (B) and (C):

[0081] (A) Anionic surfactants;

[0082] (B) Anionic polymers;

[0083] (C) Cationic polymers with a cationic charge density of less than 5.0 meq / g.

[0084] The mass ratio of component (A) to the total mass of components (B) and (C) (A) / ((B)+(C))) is 6 or more; and

[0085] (D) Carbon dioxide.

[0086] <2> As described in <1> above, the aerosol cosmetic contains, wherein component (A) is preferably one or more selected from fatty acids with 12 to 22 carbon atoms or their salts, alkyl sulfates with 12 to 22 carbon atoms or their salts, polyoxyethylene alkyl ether sulfates with 12 to 22 carbon atoms or their salts, polyoxyethylene alkyl ether phosphates with 12 to 22 carbon atoms or their salts, dialkyl sulfosuccinic acid with 12 to 24 carbon atoms or their salts, N-alkyl methyl taurine with 12 to 22 carbon atoms or their salts, and N-acyl glutamic acid with 12 to 22 carbon atoms or their salts, more preferably polyoxyethylene alkyl ether sulfates or their salts, N-acyl glutamic acid with 12 to 22 carbon atoms or their salts, and even more preferably polyoxyethylene lauryl ether sulfates or their salts, N-coconut oil fatty acid acyl glutamic acid or their salts.

[0087] <3> As described in <1> or <2> above, the content of component (A) in the stock solution is preferably 1% by mass or more, 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.

[0088] <4> The aerosol cosmetic as described in any one of <1> to <3> above, wherein component (B) is preferably an acrylic polymer, more preferably an acrylic / (meth)acrylate alkyl ester copolymer, a carboxyvinyl polymer, a polyoxyethylene alkyl ether modified acrylic copolymer, and even more preferably contains at least one selected from (acrylic / (meth)acrylate alkyl (C10-30) ester) copolymer, carboxyvinyl polymer, and (acrylate / methacrylate stearyl alcohol polyether-20) copolymer.

[0089] <5> The aerosol cosmetic as described in any one of <1> to <4> above, wherein the content of component (B) in the stock solution 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.

[0090] <6> The aerosol cosmetic as described in any one of <1> to <5> above, wherein the cationic charge density of component (C) is preferably 0.8 to 4 meq / g, more preferably 1 to 3.3 meq / g.

[0091] <7> The aerosol cosmetic as described in any one of <1> to <6> above, wherein component (C) is more preferably selected from one or more of cationic hydroxyalkyl cellulose, cationic guar gum, diallyl dimethyl ammonium chloride / acrylamide copolymer, and N,N-dimethylaminoethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer.

[0092] <8> The aerosol cosmetic as described in any one of <1> to <7> above, wherein the content of component (C) in the stock solution 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.

[0093] <9> The aerosol cosmetic as described in any one of <1> to <8> above, wherein 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, further preferably 50 or less, and further more preferably 30 or less.

[0094] <10> The aerosol cosmetic as described in any one of <1> to <9> above, wherein 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, even more preferably 1.5 or less.

[0095] <11> The aerosol cosmetic as described in any one of <1> to <10> above, wherein the stock solution preferably further contains polyols.

[0096] <12> As described in <11> above, the aerosol cosmetic contains, preferably, one or more polyols selected from 1,3-butanediol and polyoxyethylene methyl glucoside.

[0097] <13> As described in <11> or <12> above, the content of polyol in the stock solution is preferably 0.5% by mass or more, 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, even more preferably 20% by mass or less.

[0098] <14> The aerosol cosmetic as described in any one of <1> to <13> above, wherein the water content in the stock solution is preferably 30-85% by mass, more preferably 40-80% by mass, and even more preferably 50-75% by mass.

[0099] <15> The aerosol cosmetic as described in any one of <1> to <14> above, wherein 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.

[0100] <16> The aerosol cosmetic as described in any one of <1> to <15> above, wherein it is manufactured by filling the stock solution and (D) carbon dioxide into a pressure-resistant container, and 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.

[0101] <17> The aerosol cosmetic as described in any one of <1> to <16> above, wherein it is preferable not to contain any propellant other than carbon dioxide, or when it contains a propellant other than carbon dioxide, the carbon dioxide content relative to the total amount of the propellant is 85% by mass or more, more preferably 90% by mass or more, further preferably 95% by mass or more, and even more preferably 98% by mass or more.

[0102] <18> The aerosol cosmetic as described in any one of <1> to <17> above, wherein the spraying form is preferably a foam type that is expelled in a foam-like manner.

[0103] <19> The aerosol cosmetic as described in any one of <1> to <18> above, wherein the aerosol cosmetic is a skin cosmetic.

[0104] <20> As described in any one of <1> to <19> above, the aerosol cosmetic is applied to the skin, left for a certain period of time to allow it to blend with the skin, massaged, and then wiped off or rinsed off before use.

[0105] <21> A method for manufacturing an aerosol cosmetic as described in any one of <1> to <20> above, characterized in that it comprises the following steps 1 to 3:

[0106] Step 1: The process of stirring the components (A) and (B), heating them to above 50°C, and mixing them.

[0107] Step 2: Next, add component (C), stir and mix to prepare the stock solution;

[0108] Step 3: After cooling the stock solution obtained in Step 2, fill it into a pressure-resistant container, seal it, and then pressurize and fill it with component (D).

[0109] Example

[0110] Examples 1-8 and Comparative Examples 1-3

[0111] Aerosol cosmetics with the composition shown in Table 1 were manufactured. The particle size of the emitted foam was measured, and the uniformity of foam texture, foam retention (duration of massage), and duration of post-cleansing moisture (Δ moisture content) were evaluated. The results are shown in Table 1.

[0112] (Manufacturing method)

[0113] Step 1: Disperse the components (A) and (B) using a disperser, then heat to 60℃~70℃ and mix.

[0114] Step 2: Next, add ingredient (C) and mix using a propeller to prepare the stock solution.

[0115] Step 3: After cooling the stock solution obtained in Step 2 to 15–30°C, fill it into a pressure-resistant container, seal it, and then pressurize and fill component (D) to obtain an aerosol cosmetic. The stock solution contains 97.9 parts by weight of carbonic acid, with 2.1 parts by weight added. (Stock solution: Carbon dioxide = 97.9:2.1)

[0116] (Evaluation Method)

[0117] (1) Foam particle size / standard deviation (μm):

[0118] Foam of various cosmetics was extruded onto a glass slide, and a coverslip was gently placed over it without pressing down. The foam was then photographed 10 seconds after extrusion using a digital microscope (KH-8700HYROX, 100x magnification). Measurements were taken near the center of the obtained image. The diameter of all foams within the area. If the number of foams in this area is less than 50, the foams in adjacent areas are measured to make the total 50.

[0119] The results are expressed as mean particle size and standard deviation.

[0120] (2) Uniformity of foam texture:

[0121] Foam of each cosmetic product was expelled onto a glass slide, and a coverslip was gently placed over it without pressing down. The foam was then photographed 10 seconds after expulsion using a digital microscope (KH-8700HYROX, 100x magnification). The obtained images were then visually evaluated by a professional evaluator on a scale of 5.

[0122] 5: The foam is of uniform size.

[0123] 4: The size of the foam is slightly uniform.

[0124] 3: The size of the foam is slightly uneven.

[0125] 2: The size of the foam is uneven.

[0126] 1: The size of the foam is extremely uneven.

[0127] (3) Foam retention (the duration of massage):

[0128] Professional evaluators extruded foam from each cosmetic onto the back of their hand, applied a cutting motion with their fingertips in a circular motion for 5 seconds, and then evaluated the thickness of the foam on a scale of 5.

[0129] 5: The richness of the foam provides a satisfying massage.

[0130] 4: The richness of the foam that allows for massage.

[0131] 3: The foam has a thick texture that allows for gentle massage.

[0132] 2: The thick texture of the foam makes it less suitable for massage.

[0133] 1: The thickness of the foam makes it impossible to massage.

[0134] (4) Duration of the moist feeling after cleaning (Δ moisture content):

[0135] 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. Foam of various cosmetics was applied to the measurement area, massaged for 5 seconds, rinsed with tap water, and patted dry with a towel. After 15 minutes of cleansing, the moisture content of the forearm was measured five more times using a Corneometer, and the average value was calculated. The results are expressed as the moisture content before and after cleansing, and the difference between these (Δmoisture content = moisture content after 15 minutes of cleansing - moisture content before cleansing).

[0136]

[0137] Example 9

[0138] Aerosol cosmetics with the compositions shown in Table 2 were manufactured in the same manner as in Examples 1-8.

[0139] The resulting aerosol cosmetic produces foam with a uniform texture, good foam retention, and excellent sustained massage effect. Furthermore, the skin remains moisturized after cleansing.

[0140] [Table 2]

[0141]

[0142] Examples 10-17 and Comparative Example 4

[0143] Aerosol cosmetics with the compositions shown in Table 3 were manufactured in the same manner as in Examples 1-9. The particle size of the emitted foam was measured, and the uniformity of the foam texture, foam retention (duration of massage), and duration of post-cleansing moisture (Δ moisture content) were evaluated. The results are presented together.

[0144] Table 3.

[0145]

Claims

1. An aerosol cosmetic, wherein, contain: The stock solution contains the following components (A), (B) and (C): (A) Anionic surfactants; (B) Anionic polymers; (C) Cationic polymers with a cationic charge density of less than 5.0 meq / g. The mass ratio of component (A) to the total mass of components (B) and (C) (A) / ((B)+(C))) is 6 or more; and (D) Carbon dioxide, The propellant does not contain any propellant other than carbon dioxide; or, when the propellant contains any propellant other than carbon dioxide, the carbon dioxide content is 85% or more by mass relative to the total amount of the propellant.

2. The aerosol cosmetic as described in claim 1, wherein, Component (A) is one or more selected from fatty acids with 12 to 22 carbon atoms or their salts, alkyl sulfates with 12 to 22 carbon atoms or their salts, polyoxyethylene alkyl ether sulfates with 12 to 22 carbon atoms or their salts, polyoxyethylene alkyl ether phosphoric acid with 12 to 22 carbon atoms or their salts, dialkyl sulfosuccinic acid with 12 to 24 carbon atoms or its salts, N-alkyl methyl taurine with 12 to 22 carbon atoms or its salts, and N-acyl glutamic acid with 12 to 22 carbon atoms or its salts.

3. The aerosol cosmetic as described in claim 1 or 2, wherein, Component (B) is an acrylic polymer.

4. The aerosol cosmetic as described in claim 1 or 2, wherein, Component (B) contains at least one selected from (acrylic acid / (meth)acrylic acid C10-30 alkyl ester) copolymer, carboxyvinyl polymer, and (acrylate / stearyl methacrylate-20) copolymer.

5. The aerosol cosmetic as described in claim 1 or 2, wherein, Component (C) is one or more selected from cationic hydroxyalkyl cellulose, diallyl dimethyl ammonium chloride / acrylamide copolymer, N,N-dimethylaminoethyl methacrylate diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer, and cationic guar gum.

6. The aerosol cosmetic as described in claim 1 or 2, wherein, The content of component (A) in the stock solution is 1-40% by mass.

7. The aerosol cosmetic as described in claim 1 or 2, wherein, The content of component (A) in the stock solution is 5-15% by mass.

8. The aerosol cosmetic as described in claim 1 or 2, wherein, The content of component (B) in the original solution is 0.01~2% by mass.

9. The aerosol cosmetic as described in claim 1 or 2, wherein, The content of component (B) in the original solution is 0.04~1% by mass.

10. The aerosol cosmetic as described in claim 1 or 2, wherein, The content of component (C) in the original solution is 0.01~3% by mass.

11. The aerosol cosmetic as described in claim 1 or 2, wherein, The content of component (C) in the original solution is 0.04~1% by mass.

12. The aerosol cosmetic as described in claim 1 or 2, wherein, The mass ratio of component (A) to the total mass of components (B) and (C) (A) / ((B)+(C)) is 6~250.

13. The aerosol cosmetic as described in claim 1 or 2, wherein, The mass ratio of component (A) to the total mass of components (B) and (C) (A) / ((B)+(C)) is 7~220.

14. The aerosol cosmetic as described in claim 1 or 2, wherein, The mass ratio of component (B) to component (C) is 0.2 to 4.

15. The aerosol cosmetic as described in claim 1 or 2, wherein, The mass ratio of component (B) to component (C) is 0.8 to 2.

16. The aerosol cosmetic as described in claim 1 or 2, wherein, The mass ratio of stock solution to carbon dioxide is 94:6 to 99.5:0.

5.

17. The aerosol cosmetic as described in claim 1 or 2, wherein, The propellant does not contain any propellant other than carbon dioxide; or, when the propellant contains any propellant other than carbon dioxide, the carbon dioxide content is 90% or more by mass relative to the total amount of the propellant.

18. The aerosol cosmetic as described in claim 1 or 2, wherein, The original solution further contains polyols.

19. The aerosol cosmetic as described in claim 18, wherein, The polyol is one or more selected from 1,3-butanediol and polyoxyethylene methyl glucoside.

20. The aerosol cosmetic as described in claim 18, wherein, The content of polyols in the original solution is above 0.5% by mass.

21. The aerosol cosmetic as described in claim 18, wherein, The content of polyols in the original solution is 3-20% by mass.

22. The aerosol cosmetic as described in claim 1 or 2, wherein, The water content in the original solution is 30-85% by mass.

23. The aerosol cosmetic as described in claim 1 or 2, wherein, The water content in the original solution is 50-75% by mass.

24. The aerosol cosmetic as described in claim 1 or 2, wherein, The viscosity of the stock solution at 25℃ is 400~10000 mPa·s.

25. The aerosol cosmetic as described in claim 1 or 2, wherein, The viscosity of the stock solution at 25°C is 500~7000 mPa·s.

26. The aerosol cosmetic as described in claim 1 or 2, wherein, It is manufactured by filling a pressure-resistant container with the stock solution and (D) carbon dioxide, and the mass ratio of the stock solution to carbon dioxide is 96.5:3.5 to 98.5:1.

5.

27. The aerosol cosmetic as described in claim 1 or 2, wherein, The spray pattern is a foam-like ejection.

28. The aerosol cosmetic as described in claim 1 or 2, wherein, The aerosol cosmetics mentioned are skin cosmetics.

29. The aerosol cosmetic as described in claim 1 or 2, wherein, Apply to the skin, leave for a certain period of time to allow it to blend with the skin, massage, and then wipe or rinse off before use.

30. A method for manufacturing an aerosol cosmetic according to any one of claims 1 to 29, characterized in that, Includes the following processes 1-3: Process 1: The process of stirring, heating to above 50°C, and mixing components (A) and (B); 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 pressurize and fill it with component (D).

31. An aerosol cosmetic, wherein, contain: The stock solution contains the following components (A), (B) and (C): (A) Anionic surfactants; (B) Anionic polymers; (C) Cationic polymers with a cationic charge density of less than 5.0 meq / g. The mass ratio of component (A) to the total mass of components (B) and (C) (A) / ((B)+(C))) is 6~250; and (D) Carbon dioxide, The propellant does not contain any propellant other than carbon dioxide; or, when the propellant contains any propellant other than carbon dioxide, the carbon dioxide content is 85% or more by mass relative to the total amount of the propellant.

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