Aerosol cosmetics for hair and / or scalp

Abstract

To provide an aerosol cosmetic for hair and / or scalp having light use feeling which not only exerts excellent blood circulation promoting effect (flush of skin) by carbonic acid gas onto a sculp, but also has excellent spreading property onto a scalp, and does not have sticky feeling or hooked feeling after use.SOLUTION: An aerosol cosmetic for hair and / or scalp which contains aerosol stock solution having the following components (A) to (E), and propellant containing component (F). (A) water-soluble polymer; (B) HLB8 or more and 18 or less of nonionic surfactant; (C) phenyl-modified silicone; (D) polyalkylene glycol having number-average molecular weight of 140 or more and 30000 or less; (E) water; and (F) carbonic acid gas.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an aerosol cosmetic for hair and / or scalp containing carbon dioxide. [Background technology]

[0002] Carbon dioxide is known to promote blood circulation, and aerosol-type cosmetics that use carbon dioxide as a propellant are widely used. For example, known aerosol cosmetics include a stock solution containing dimethylpolysiloxane and polyethylene glycol in specific ratios, as well as a water-soluble thickener and a nonionic surfactant of a specific HLB, and carbon dioxide, with suppressed carbon dioxide volatilization (Patent Document 1); a blood circulation promoting aerosol composition consisting of a stock solution containing a hydrophilic surfactant, a thickener, and an oil component, and carbon dioxide, in which a foamy state is maintained for at least 1 minute after application to the skin (Patent Document 2); and an aerosol cosmetic containing polyglycerin monofatty acid ester, sugars, silicone oil, and carbon dioxide, in which a foamy state is maintained even during massage treatment, making it easy to massage (Patent Document 3). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-2126 [Patent Document 2] Japanese Patent Publication No. 2012-97013 [Patent Document 3] Japanese Patent Publication No. 2011-93877 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] However, the aerosol cosmetics described in Patent Documents 1 to 3 are all intended for use on skin other than the scalp, and the ease of application, smoothness of combing, and suppression of stickiness when applied to hair or scalp have not been considered.

[0005] Therefore, the present invention relates to an aerosol cosmetic for hair and / or scalp that not only exhibits an excellent blood circulation promoting effect (skin flushing) on ​​the scalp due to carbon dioxide, but also has excellent spreadability on the scalp, and has a light feel without stickiness or hair tangling after use. [Means for solving the problem]

[0006] The inventors of the present invention have discovered that a carbon dioxide-containing aerosol cosmetic containing a water-soluble polymer, a nonionic surfactant of a specific HLB, a phenyl-modified silicone, and a polyalkylene glycol in the stock solution not only promotes blood circulation in the scalp but also has excellent spreadability when applied to hair and scalp, as well as a light feel with no stickiness or smoothness, thus completing the present invention.

[0007] The present invention provides an aerosol cosmetic for hair and / or scalp, comprising an aerosol concentrate containing the following components (A) to (E), and a propellant containing component (F). (A) Water-soluble polymer (B) Nonionic surfactants with an HLB of 8 to 18 (C) Phenyl-modified silicone (D) Polyalkylene glycols with a number-average molecular weight of 140 to 30,000 (E) Water (F) Carbon dioxide

[0008] Furthermore, the present invention provides a treatment method in which the above-mentioned aerosol cosmetic is dispensed from an aerosol container onto moist hair and / or scalp, massaged optionally, and allowed to dry without rinsing. [Effects of the Invention]

[0009] The aerosol cosmetic for hair and / or scalp of the present invention not only exhibits an excellent blood circulation promoting effect (skin flushing) on ​​the scalp due to carbon dioxide, but also has excellent spreadability on the scalp and a light feel without stickiness or snagging after use. [Modes for carrying out the invention]

[0010] [Component (A): Water-soluble polymer] The water-soluble polymer of component (A) can be any polymer commonly used in cosmetics, such as carrageenan, dextrin, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, polyvinyl alcohol, polyacrylic acid, polymethacrylic acid, carboxyvinyl polymer, acrylic acid / alkyl acrylate copolymer, xanthan gum, carboxymethyl chitin, and chitosan. Of these, acrylic acid polymers and cellulose derivatives are preferred, and acrylic acid polymers are more preferred, from the viewpoint of improving the manageability of hair, the shape retention of dispensed foam, and suppressing the feeling of stiffness in the hair. Specifically, from the above viewpoint, one or more selected from carboxyvinyl polymer, acrylic acid / alkyl acrylate copolymer, and hydroxyethylcellulose are more preferred, and acrylates / alkyl acrylate (C10-30) crosspolymer is more preferred. Here, acrylates / alkyl acrylate (C10-30) crosspolymer refers to C 10-30 A copolymer of alkylacrylic acid and acrylic acid, methacrylic acid, or a lower alkyl ester thereof, crosslinked with sucrose allyl ether or pentaerythritol allyl ether, can be used, such as commercially available products like Pemlen TR-1, Pemlen TR-2, Carbopol ETD2020, Carbopol 1342, and Carbopol 1382 (all from Lubrizol Advanced Materials).

[0011] In addition, acid-type water-soluble polymers such as polyacrylic acid, carboxyvinyl polymer, and acrylates / acrylic acid alkyl (C10-30) cross polymer are preferably used with alkali metal hydroxides such as potassium hydroxide and sodium hydroxide as neutralizing agents and used as water-soluble or water-dispersible salts.

[0012] Component (A) can be used alone or in combination of two or more. From the viewpoint of improving the shape retention of the discharged foam, the content in the aerosol stock solution is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, still more preferably 0.15% by mass or more. Also, from the viewpoint of improving the smoothness of the hair and suppressing the squeaking feeling of the hair, it is preferably 2% by mass or less, more preferably 1% by mass or less, still more preferably 0.4% by mass or less. That is, the specific content range of component (A) in the aerosol stock solution is preferably 0.05 to 2% by mass, more preferably 0.1 to 1% by mass, still more preferably 0.15 to 0.4% by mass.

[0013] 〔Component (B): Nonionic surfactant with HLB of 8 or more and 18 or less〕 The nonionic surfactant of component (B) has an HLB of 8 or more and 18 or less. From the viewpoint of ease of spreading on the scalp, those with an HLB of 8 or more and 13 or less are preferred, and those with an HLB of 8 or more and 12 or less are preferred.

[0014] Here, the HLB (Hydrophilic-Lipophilic Balance) in the present invention indicates the molecular weight of the hydrophilic group portion in the total molecular weight of the surfactant and is determined by the Griffin formula. The HLB of a mixed surfactant composed of two or more nonionic surfactants is determined as follows. The HLB of the mixed surfactant is the weighted average sum of the HLB values of each nonionic surfactant based on its content ratio.

[0015] Mixed HLB = Σ(HLBx × Wx) / ΣWx HLBx represents the HLB value of the nonionic surfactant X. Wx represents the mass (g) of the nonionic surfactant X having the value of HLBx.

[0016] Examples of the nonionic surfactant as the component (B) include polyglycerol fatty acid ester, polyethylene glycol fatty acid ester, sucrose fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene glycerol fatty acid ester, polyoxyethylene propylene glycol fatty acid ester, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid ester, polyoxyethylene phytostanol ether, polyoxyethylene phytosterol ether, polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, polyoxyalkylene-modified organopolysiloxane, polyoxyalkylene-alkyl copolymer-modified organopolysiloxane, etc. One or more selected from these can be used. Among these, from the viewpoint of the foaming property during the discharge of carbon dioxide gas, polyoxyethylene alkyl ether and polyoxyethylene hydrogenated castor oil are preferable.

[0017] The component (B) can be used alone or in combination of two or more. From the viewpoint of improving the foaming property, the content in the aerosol stock solution is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, still more preferably 0.15% by mass or more. Also, from the viewpoint of suppressing stickiness during application, it is preferably 10% by mass or less, more preferably 5% by mass or less, still more preferably 1% by mass or less, still more preferably 0.5% by mass or less. That is, the specific content range of the component (B) in the aerosol stock solution is preferably 0.05 to 10% by mass, more preferably 0.1 to 5% by mass, still more preferably 0.1 to 1% by mass, still more preferably 0.1 to 0.5% by mass, still more preferably 0.15 to 0.5% by mass.

[0018] [Component (C): Phenyl-modified silicone] The aerosol cosmetic composition of the present invention contains a phenyl-modified silicone as component (C). The phenyl-modified silicone can be any silicone having a dimethylsiloxane skeleton in which at least some of the methyl groups are substituted with phenyl groups, such as diphenyl dimethicone, phenylpropyldimethylsiloxysilicate, bisphenylpropyl dimethicone, phenyl trimethicone, trimethylpentaphenyltrisiloxane, diphenylsiloxyphenyl trimethicone, and trimethylsiloxyphenyl dimethicone. Examples of commercially available products include "TSF431," "TSF433," "TSF437," "SilShine 151," and "SF1555" from Momentive Performance Materials, "SH 556 Fluid" and "PH-1555" from Toray Dow Corning, "KF-50-100CS," "KF-50-1000CS," "KF-53," "KF-54," and "KF-56A" from Shin-Etsu Chemical Co., Ltd., and "PDM20," "PDM350VP," and "PDM1000" from Asahi Kasei Wacker Corporation. Component (C) can be used alone or in combination of two or more as needed.

[0019] The content of component (C) in the aerosol concentrate is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, and even more preferably 0.03% by mass or more, from the viewpoint of improving the manageability of the hair, and preferably 1% by mass or less, more preferably 0.5% by mass or less, and even more preferably 0.3% by mass or less, from the viewpoint of suppressing the sticky feeling of the hair. In other words, the specific content range of component (C) in the aerosol concentrate is preferably 0.01 to 1% by mass, more preferably 0.02 to 0.5% by mass or less, and even more preferably 0.03 to 0.3% by mass.

[0020] [Component (D): Polyalkylene glycol with a number-average molecular weight of 140 to 30,000] The aerosol cosmetic composition of the present invention contains a polyalkylene glycol with a number average molecular weight of 140 to 30,000 as component (D). The polyalkylene glycol is not particularly limited as long as it is a type commonly used in cosmetics with a number average molecular weight of 140 to 30,000. From the viewpoint of improving spreadability on the scalp, the number average molecular weight of the polyalkylene glycol is 140 or more, preferably 190 or more, and more preferably 570 or more. Furthermore, from the viewpoint of suppressing stickiness on the hair, it is 30,000 or less, preferably 10,000 or less, more preferably 5,000 or less, and even more preferably 2,000 or less.

[0021] In the polyalkylene glycol of component (D), the number of carbon atoms in the alkylene group is preferably 2 to 6, more preferably 2 to 4, and as specific alkylene groups, ethylene groups and propylene groups are preferred, with ethylene groups being more preferred.

[0022] [Number average molecular weight of polyalkylene glycols] The number-average molecular weight of polyalkylene glycols can be calculated by measuring the molecular weight distribution using gel permeation chromatography, as shown below.

[0023] (1) Preparation of sample solution Dissolve polyalkylene glycol in tetrahydrofuran to a concentration of 0.5 g / 100 mL. Then, filter this solution using a 0.45 μm mesh fluoropolymer filter "DISMIC-25JP" (manufactured by Advantec Co., Ltd.) to remove insoluble components and obtain the sample solution.

[0024] (2)Molecular weight distribution measurement Using the apparatus described below, tetrahydrofuran is flowed at a rate of 1 mL / min, and the column is stabilized in a 40°C constant temperature bath. 100 μL of the sample solution is then injected, and the measurement is performed. The molecular weight of the sample is calculated based on a pre-prepared calibration curve. The calibration curve includes several types of monodisperse polystyrene (2.63 × 10⁶, manufactured by Tosoh Corporation). 3 , 2.06×10 4 , 1.02 × 10 5, GL Sciences Co., Ltd. 2.10×10 3 , 7.00×10 3 , 5.04×10 4 A sample prepared using ) as a standard sample will be used. Measurement device: HLC-8220 GPC (manufactured by Tosoh Corporation) Analytical column: GMHXL+G3000HXL (manufactured by Tosoh Corporation)

[0025] Specifically, component (D) includes polyethylene glycol 200, polyethylene glycol 300, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 1000, polyethylene glycol 1500, polyethylene glycol 4000, polyethylene glycol 6000, polyethylene glycol 11000, and polyethylene glycol 20000. Furthermore, from the same viewpoint as described above, polyethylene glycol 200, polyethylene glycol 300, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 1000, polyethylene glycol 1500, polyethylene glycol 4000, and polyethylene glycol 6000 are preferred, polyethylene glycol 600, polyethylene glycol 1000, polyethylene glycol 1500, and polyethylene glycol 4000 are more preferred, and polyethylene glycol 600, polyethylene glycol 1000, and polyethylene glycol 1500 are even more preferred. Commercially available products can be used for these, for example, PEG#600, PEG#1000, and PEG#1500 (all manufactured by NOF Corporation) can be used. These components (D) can be used individually or in combination of two or more.

[0026] The content of component (D) in the aerosol concentrate is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and even more preferably 0.2% by mass or more, from the viewpoint of improving spreadability on the scalp, and preferably 5% by mass or less, more preferably 2% by mass or less, and even more preferably 1% by mass or less, from the viewpoint of suppressing stickiness of the hair. In other words, the specific content range of component (D) in the aerosol concentrate is preferably 0.01 to 5% by mass, more preferably 0.1 to 2% by mass, and even more preferably 0.2 to 1% by mass.

[0027] Furthermore, the mass ratio (C) / (D) of component (C) to component (D) is preferably 0.01 or higher, more preferably 0.05 or higher, and even more preferably 0.1 or higher, from the viewpoint of achieving both good manageability of the hair and good spreadability on the scalp. Also, from the viewpoint of suppressing stickiness of the hair, it is preferably 15 or lower, more preferably 10 or lower, even more preferably 7 or lower, even more preferably 5 or lower, and even more preferably 1 or lower.

[0028] [Ingredient (E): Water] The aerosol concentrate contains water as component (E). The water content in the aerosol concentrate is preferably 55% by mass or more, more preferably 80% by mass or more, even more preferably 85% by mass or more, and also preferably 99% by mass or less, more preferably 97% by mass or less, and even more preferably 95% by mass or less, from the viewpoint of suppressing stickiness on the scalp and improving spreadability. In other words, the specific content range of component (E) in the aerosol concentrate is preferably 55 to 99% by mass, more preferably 80 to 97% by mass, and even more preferably 85 to 95% by mass.

[0029] [Oils] The aerosol concentrate may also contain oils other than those commonly used in cosmetics (C) in order to increase the carbon dioxide concentration in the concentrate and allow the carbon dioxide to act on the scalp. Among the oils, those that are liquid at 25°C include, specifically, hydrocarbons such as paraffin, squalane, and squalene; natural animal and vegetable oils mainly composed of triglycerides such as camellia oil, jojoba oil, olive oil, macadamia nut oil, avocado oil, and olive oil; glycerin monostearate, glycerin distearate, glycerin monooleate, isopropyl palmitate, isopropyl stearate, butyl stearate, isopropyl myristate, diethyl phthalate, myristyl lactate, cetyl myristate, cetyl lactate, cetyl 2-ethylhexanoate, ethylhexyl palmitate, octyldodecyl myristate, octyldodecyl oleate, glycerol triisostearate, and di-paramethoxycinnamate-mono-2-ethylhexanoate. Examples include monoester oils such as glyceryl, isotridecyl isononanoate, glyceryl monomyristate monoisostearate, and alkyl benzoate (alkyl groups with 12 to 15 carbon atoms); diester oils such as diisopropyl adipate, diisobutyl adipate, neopentyl glycol dicaprate, caprylic / capric triglyceride, glyceryl tricaprate, neopentyl glycol di-2-ethylhexanoate, di(caprylic / capric acid)propanediol, 1-isostearoyl-3-myristoylglycerol, diisostearyl malate, and di(cholesteryl / octyldodecyl) N-lauroyl-L-glutamate; ether oils such as alkyl-1,3-dimethylbutyl ether, dicaprylyl ether, and dicaprylyl ether; and essential oils such as eucalyptus oil and peppermint oil. Of these, monoester oils and diester oils are preferred in terms of increasing the carbon dioxide concentration and providing a smooth feel, and isotridecyl isononanoate and alkyl benzoate are more preferred.

[0030] Furthermore, examples of oils other than liquids at 25°C include waxes, pastes, and solid fats that are solid at 25°C, such as higher alcohols with 12 to 24 carbon atoms, higher fatty acids with 12 to 24 carbon atoms, and paraffin wax.

[0031] The total content of these oils (component (C) and other oils) in the aerosol concentrate is preferably 10% by mass or less, more preferably 5% by mass or less, and more preferably 3% by mass or less, from the viewpoint of ease of application to the scalp and suppression of stickiness.

[0032] [Hair growth ingredients] The aerosol cosmetic composition of the present invention may further contain hair growth ingredients. Examples of hair growth ingredients include blood circulation promoters, hair follicle activators, and anti-androgen agents.

[0033] Examples of blood circulation promoters include nicotinamide, acetylcholine, Swertia japonica extract, ginseng extract, Ginkgo biloba extract, carpronium chloride, diphenhydramine hydrochloride, γ-oryzanol, circretin, vitamin E and its derivatives, camphor, capsicum tincture, ginger tincture, watercress, cantharis tincture, Japanese pepper extract, peppermint oil, wasabi radish extract, minoxidil and its derivatives, chromalim, diazoxide and its derivatives, nicorandil, pinacidil, phthalides, cinchona extract, spruce extract, and the like.

[0034] Examples of hair follicle activators include trans-3,4'-dimethyl-3-hydroxyflavanone, N-acetyl-L-methionine, Stephania tetrandra, cepharanthine, Sophora flavescens extract, adenosine triphosphate disodium, potassium aspartate, photosensitive dye 301, pentadecane glyceride, hinokitiol, Panax ginseng extract, flavanonol and its derivatives, Hypericum perforatum extract, Myosotis alba flower extract, Coleus extract, grape extract, biotin, mononitroguaiacol sodium, Astragalus membranaceus extract, yeast extract, garlic components, Jujube extract, placenta extract, Paeonia suffruticosa extract, royal jelly, and the like.

[0035] Examples of anti-androgen agents include cyproterone acetate, 11-α-hydroxyprogesterone, flutamide, 3-deoxyadenosine, chlormadinone acetate, ethinylestradiol, spironolactone, epitestosterone, glycyrrhizic acid and its derivatives, glycyrrhetinic acid and its derivatives, clove extract, aloe extract, sansho extract, and cuacalarate extract.

[0036] Hair growth ingredients can be used alone or in combination of two or more. The content of hair growth ingredients in the aerosol concentrate is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.07% by mass or more, and also preferably 7% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less.

[0037] [Surfactants other than ingredient (B)] The aerosol cosmetic composition of the present invention may further contain surfactants other than component (B) in the stock solution in order to improve the solubility of carbon dioxide in the stock solution, improve emulsification stability, and generate a large amount of bubbles. Examples of surfactants other than component (B) include nonionic surfactants, anionic surfactants, and amphoteric surfactants with an HLB of less than 8.

[0038] Nonionic surfactants with an HLB of less than 8 include sorbitan fatty acid esters with 8 to 22 carbon atoms; alkyl glyceryl ethers such as isostearyl glyceryl ether; and polyoxyalkylene-modified silicones.

[0039] Examples of sorbitan fatty acid esters include sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan sesquioleate, and sorbitan tristearate. Commercially available products such as Rheodol SP-P10 (HLB 6.7) as sorbitan monopalmitate, Rheodol SP-S10V (HLB 4.7) as sorbitan monostearate, Rheodol SP-O10V (HLB 4.3) as sorbitan monooleate, Rheodol AO-15V (HLB 3.7) as sorbitan sesquioleate, and SP-S30V (HLB 2.1) as sorbitan tristearate (all manufactured by Kao Corporation) can be used.

[0040] Examples of polyoxyalkylene-modified silicones include polyoxyethylene-methylpolysiloxane copolymers and poly(oxyethylene-oxypropylene)-methylpolysiloxane copolymers. Commercially available products such as KF-6015 (PEG-3 dimethicone) (HLB 4.5) and KF-6019 (PEG-9 dimethicone) (HLB 4.5) sold by Shin-Etsu Chemical Co., Ltd., and SH-3775M (PEG-12 dimethicone) (HLB 5) sold by Toray Dow Corning Silicone Co., Ltd. can be used.

[0041] When using a nonionic surfactant with an HLB of less than 8, the content in the aerosol stock solution is preferably 0.01 to 1% by mass, more preferably 0.05 to 0.7% by mass.

[0042] Examples of anionic surfactants include C12-C22 alkyl sulfate esters or salts thereof, such as sodium lauryl sulfate and potassium lauryl sulfate; C12-C22 polyoxyethylene alkyl ether phosphate or salts thereof, such as sodium polyoxyethylene lauryl ether phosphate; C12-C24 dialkyl sulfosuccinic acid or salts thereof; C12-C22 N-alkylylmethyl taurine or salts thereof; and C12-C22 N-acyl glutamic acid or salts thereof. Of these, polyoxyethylene alkyl ether phosphate or salts thereof and acyl glutamic acid or salts thereof are preferred in terms of emulsification stability and generating a large amount of bubbles during dispensing. If anionic surfactant is included, its content in the aerosol stock solution is preferably 0.01 to 1% by mass, more preferably 0.05 to 0.7% by mass.

[0043] The total amount of all surfactants, including component (B), in the aerosol concentrate is preferably 0.1 to 10% by mass, more preferably 0.2 to 8% by mass, and even more preferably 0.3 to 5% by mass, from the viewpoint of carbon dioxide solubility, usability, and stability.

[0044] Furthermore, the aerosol concentrate may contain a divalent or trivalent alcohol in addition to suppress the volatilization of carbon dioxide and improve the feel after application. Examples of divalent alcohols include propylene glycol, propanediol, 1,3-butylene glycol, 1,3-propanediol, and dipropylene glycol, with 1,3-propanediol and dipropylene glycol being preferred. Examples of trivalent alcohols include glycerin, diglycerin, and polyglycerin. The content of these divalent or trivalent alcohols in the aerosol concentrate is preferably 1 to 20% by mass, more preferably 2 to 15% by mass, and even more preferably 2 to 10% by mass.

[0045] [Other optional ingredients] The aerosol concentrate may also contain ingredients commonly used in cosmetics, such as ethanol, preservatives, antioxidants, pigments, pH adjusters, fragrances, UV absorbers, moisturizers, blood circulation promoters, cooling agents, antiperspirants, disinfectants, whitening agents, anti-inflammatory agents, and skin activators.

[0046] The aerosol concentrate is prepared by mixing components (A) to (E) and other components. The viscosity of the aerosol concentrate at 30°C is preferably 500 to 20000 mPa·s, more preferably 1000 to 10000 mPa·s, and even more preferably 3500 to 9000 mPa·s, from the viewpoint of the emulsion stability of the concentrate and the foam discharge properties. 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 10,000 mPa·s, the value was measured at rotor No. 3, 6 rpm, and 1 minute.

[0047] [Component (F): Carbon dioxide] The aerosol cosmetic composition of the present invention can be manufactured by filling an aerosol container with the aerosol concentrate described above and a propellant containing carbon dioxide, which is component (F). Examples of the aerosol container include known pressure-resistant containers made of metal, plastic, etc., and double-walled containers in which an inner bag is housed inside a pressure-resistant container. The preferred form of spraying is a foam type that is dispensed in a foamy state. 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, from the viewpoint of carbon dioxide solubility in the stock solution and foam generation.

[0048] The aerosol cosmetic composition of the present invention may contain a propellant commonly used in aerosol cosmetics, in addition to carbon dioxide, which is component (F). Examples of propellants other than carbon dioxide 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 propellant is preferably 90% by mass or more, more preferably 95% by mass or more, and even more preferably 98% by mass or more. From the viewpoint of improving the sprayability of the aerosol composition, the internal pressure of the pressure-resistant container after filling with the propellant is adjusted to preferably 0.1 MPa or more, more preferably 0.3 MPa or more, and preferably 1.3 MPa or less, and more preferably 1.0 MPa or less, at 25°C.

[0049] [Treatment Method] The aerosol cosmetic composition of the present invention, when dispensed from an aerosol container onto the hair and / or scalp and left for a certain period of time, forms a film containing air bubbles, thereby enhancing the effect of promoting blood circulation and making it suitable for use in hair and / or scalp treatment.

[0050] When treating hair and / or scalp using the aerosol cosmetic composition of the present invention, the hair and / or scalp to be treated should preferably be in a moist state, and it is preferable to dispense and apply the product directly to the hair and / or scalp. At this time, it is preferable to optionally massage the area, and then allow it to dry without rinsing.

[0051] When massaging after applying to damp hair and / or scalp, it is preferable to spread the product by pressing with your hands to break up the foam. This allows you to feel the presence of carbonation through the effervescent foam and dispensing sound as the product remains on the scalp. Furthermore, the sound of the bubbles bursting and the change from foam to liquid can evoke the feeling of moisturizing ingredients penetrating the skin. In addition, if a cooling agent such as menthol is included, the tingling sensation felt throughout the scalp can evoke the feeling of the product penetrating the skin.

[0052] Furthermore, by drying your hair with a hairdryer after the massage without rinsing, you can experience the moisturizing effect on your scalp and achieve soft hair.

[0053] With respect to the embodiments described above, preferred embodiments of the present invention are further disclosed below.

[0054] <1> An aerosol cosmetic for hair and / or scalp comprising an aerosol concentrate containing the following ingredients (A) to (E), and a propellant containing ingredient (F). (A) Water-soluble polymer (B) Nonionic surfactants with an HLB of 8 to 18 (C) Phenyl-modified silicone (D) Polyalkylene glycols with a number-average molecular weight of 140 to 30,000 (E) Water (F) Carbon dioxide

[0055] <2> Component (A) is preferably one or more selected from acrylic acid polymers and cellulose derivatives, more preferably an acrylic acid polymer, even more preferably one or more selected from carboxyvinyl polymers, acrylic acid / alkyl acrylate copolymers and hydroxyethylcellulose, and even more preferably acrylates / alkyl (C10-30) acrylate crosspolymer. <1> Aerosol cosmetics as described above.

[0056] <3> The content of component (A) in the aerosol concentrate is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.15% by mass or more, and also preferably 2% by mass or less, more preferably 1% by mass or less, and even more preferably 0.4% by mass or less. <1> or <2> Aerosol cosmetics as described above.

[0057] <4> The HLB of component (B) is preferably 8 to 13, more preferably 8 to 12. <1> ~ <3> Aerosol cosmetic as described in any one of the items.

[0058] <5> Component (B) is preferably one or more selected from polyglycerin 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 glycerin fatty acid esters, polyoxyethylene propylene glycol fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, polyoxyethylene phytostanol ethers, polyoxyethylene phytosterose ethers, polyoxyethylene cholestanol ethers, polyoxyethylene cholesteryl ethers, polyoxyalkylene-modified organopolysiloxanes, and polyoxyalkylene-alkyl-comodified organopolysiloxanes, more preferably one or more selected from polyoxyethylene alkyl ethers and polyoxyethylene hydrogenated castor oil. <1> ~ <4> Aerosol cosmetic as described in any one of the items.

[0059] <6> The content of component (B) in the aerosol concentrate is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.15% by mass or more, and also preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 1% by mass or less, and even more preferably 0.5% by mass or less. <1> ~ <5> Aerosol cosmetic as described in any one of the items.

[0060] <7> Component (C) is preferably one or more selected from diphenyl dimethicone, phenylpropyldimethylsiloxysilicate, bisphenylpropyl dimethicone, phenyl trimethicone, trimethylpentaphenyltrisiloxane, diphenylsiloxyphenyl trimethicone, and trimethylsiloxyphenyl dimethicone. <1> ~ <6> Aerosol cosmetic as described in any one of the items.

[0061] <8> The content of component (C) in the aerosol concentrate is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.03% by mass or more, and also preferably 1% by mass or less, more preferably 0.5% by mass or less, and even more preferably 0.3% by mass or less. <1> ~ <7> Aerosol cosmetic as described in any one of the items.

[0062] <9> The number-average molecular weight of component (D) is preferably 190 or more, more preferably 570 or more, and also preferably 10,000 or less, more preferably 5,000 or less, and even more preferably 2,000 or less. <1> ~ <8> Aerosol cosmetic as described in any one of the items.

[0063] <10> The number of carbon atoms in the alkylene group of the polyalkylene glycol of component (D) is preferably 2 to 6, more preferably 2 to 4, and even more preferably the alkylene group is an ethylene group or a propylene group, and even more preferably an ethylene group. <1> ~ <9> Aerosol cosmetic as described in any one of the items.

[0064] <11> Component (D) is preferably one or more selected from polyethylene glycol 200, polyethylene glycol 300, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 1000, polyethylene glycol 1500, polyethylene glycol 4000, polyethylene glycol 6000, polyethylene glycol 11000, and polyethylene glycol 20000; more preferably one or more selected from polyethylene glycol 200, polyethylene glycol 300, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 1000, polyethylene glycol 1500, polyethylene glycol 4000, and polyethylene glycol 6000; even more preferably one or more selected from polyethylene glycol 600, polyethylene glycol 1000, polyethylene glycol 1500, and polyethylene glycol 4000; even more preferably one or more selected from polyethylene glycol 600, polyethylene glycol 1000, and polyethylene glycol 1500. <1> ~ <10> Aerosol cosmetic as described in any one of the items.

[0065] <12> The content of component (D) in the aerosol concentrate is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.2% by mass or more, and also preferably 5% by mass or less, more preferably 2% by mass or less, and even more preferably 1% by mass or less. <1> ~ <11> Aerosol cosmetic as described in any one of the items.

[0066] <13> The mass ratio (C) / (D) of component (C) to component (D) is preferably 0.01 or more, more preferably 0.05 or more, even more preferably 0.1 or more, and also preferably 15 or less, more preferably 10 or less, even more preferably 7 or less, even more preferably 5 or less, and even more preferably 1 or less. <1> ~ <12> Aerosol cosmetic as described in any one of the items.

[0067] <14> The water content of component E in the aerosol concentrate is preferably 55% by mass or more, more preferably 80% by mass or more, even more preferably 85% by mass or more, and also preferably 99% by mass or less, more preferably 97% by mass or less, and even more preferably 95% by mass or less. <1> ~ <13> Aerosol cosmetic as described in any one of the items.

[0068] <15> Preferably, the aerosol concentrate further contains an oily agent other than component (C). <1> ~ <14> Aerosol cosmetic as described in any one of the items.

[0069] <16> The oils other than component (C) are one or more liquid oils at 25°C selected from hydrocarbons, natural animal and vegetable oils, monoester oils, diester oils, ether oils, and essential oils. <15> Aerosol cosmetics as described above.

[0070] <17> The oily agent other than component (C) is preferably a solid oily agent at 25°C selected from higher alcohols having 12 to 24 carbon atoms, higher fatty acids having 12 to 24 carbon atoms, and paraffin wax. <15> Aerosol cosmetics as described above.

[0071] <18> The total oil content in the aerosol concentrate, including component (C), is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less. <1> ~ <17> Aerosol cosmetic as described in any one of the items.

[0072] <19> Furthermore, the aerosol concentrate preferably contains one or more hair growth ingredients selected from blood circulation promoters, hair follicle activators, and anti-androgen agents. <1> ~ <18> Aerosol cosmetic as described in any one of the items.

[0073] <20> The hair growth component content in the aerosol concentrate is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.07% by mass or more, and also preferably 7% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less. <19> Aerosol cosmetics as described above.

[0074] <21> Furthermore, the aerosol concentrate preferably contains a surfactant other than component (B), and more preferably contains one or more selected from nonionic surfactants, anionic surfactants, and amphoteric surfactants with an HLB of less than 8. <1> ~ <20> Aerosol cosmetic as described in any one of the items.

[0075] <22> Furthermore, the aerosol concentrate preferably contains a divalent or trivalent alcohol, more preferably one or more selected from propylene glycol, propanediol, 1,3-butylene glycol, 1,3-propanediol, dipropylene glycol, glycerin, diglycerin, and polyglycerin, and even more preferably contains 1,3-propanediol and / or dipropylene glycol. <1> ~ <21> Aerosol cosmetic as described in any one of the items.

[0076] <23> An aerosol cosmetic for hair and / or scalp comprising an aerosol concentrate containing the following components (A) to (E), and a propellant containing component (F), wherein the mass ratio of component (C) to component (D) (C) / (D) is 0.05 or more and 7 or less. (A) One or more water-soluble polymers selected from acrylic acid polymers (B) Nonionic surfactants with an HLB of 8 to 13 (C) Phenyl-modified silicone (D) Polyalkylene glycols with a number-average molecular weight of 190 or more and 30,000 or less (E) Water (F) Carbon dioxide

[0077] <24> The viscosity of the aerosol concentrate at 30°C is preferably 500 to 20,000 mPa·s, more preferably 1,000 to 10,000 mPa·s, and even more preferably 3,500 to 9,000 mPa·s. <1> ~ <23> Aerosol cosmetic as described in any one of the items.

[0078] <25> An aerosol concentrate containing components (A) to (E) and a propellant containing carbon dioxide, which is component (F), are filled into an aerosol container. <1> ~ <24> Aerosol cosmetic as described in any one of the items.

[0079] <26> The aerosol container is made of metal or plastic. <25> Aerosol cosmetics as described above.

[0080] <27> The aerosol container is a double-walled container with an inner bag inside. <25> or <26> Aerosol cosmetics as described above.

[0081] <28> 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> ~ <27> Aerosol cosmetic as described in any one of the items.

[0082] <29> The propellant contains a propellant other than carbon dioxide of component (F), and the carbon dioxide content relative to the total amount of propellant is preferably 90% by mass or more, more preferably 95% by mass or more, and even more preferably 98% by mass or more. <1> ~ <28> Aerosol cosmetic as described in any one of the items.

[0083] <30> The internal pressure of the aerosol container after filling with propellant is preferably 0.1 MPa or higher, more preferably 0.3 MPa or higher, and preferably 1.3 MPa or lower, more preferably 1.0 MPa or lower, at 25°C. <25> ~ <29> Aerosol cosmetic as described in any one of the items.

[0084] <31> <1> ~ <30> A treatment method comprising applying an aerosol cosmetic described in any one of the above items to moist hair and / or scalp from an aerosol container, optionally massaging, and allowing to dry without rinsing. [Examples]

[0085] Examples 1-14, Comparative Examples 1-3 Aerosol concentrates were prepared according to the formulations shown in Tables 1-3, and these were filled into aerosol containers with carbon dioxide as a propellant to produce aerosol cosmetics. These aerosol cosmetics were evaluated according to the methods described below.

[0086] [Scalp treatment method] After washing and towel-drying the hair, the wet hair was separated and the aerosol cosmetic was sprayed directly onto the scalp from the nozzle at six locations: the left and right sides of the hairline on the forehead, the left and right sides above the ears, the crown of the head, and the nape of the neck. After applying to all six locations, the foam was gently pressed into the entire scalp with the palms of the hands, massaged in, and then dried with a hairdryer.

[0087] (1) Skin flushing The foam from each sample, sprayed from a pressure vessel, was applied to the skin in a 3 cm diameter area, left for 60 seconds, and then wiped off. The skin condition (redness) after the application was visually evaluated according to the following criteria. 4: There is a lot of redness. 3: Slight flushing is observed. 2: There is not much redness observed. 1: No flushing is observed at all.

[0088] (2) User experience (ease of application to the scalp, lack of stickiness on the scalp, ease of combing through hair) Six grams of foam from each sample, sprayed from a pressure-resistant container, was applied to the scalp, and the way it spread on the scalp was evaluated sensorily according to the following criteria. 4: It spreads very easily. 3: It's relatively easy to spread. 2: It's not very easy to spread. 1: It's not easy to spread at all.

[0089] The absence of stickiness on the scalp during application was evaluated sensorily according to the following criteria. 4: It's not sticky at all. 3: Slightly less sticky. 2: Slightly sticky. 1: It's very sticky.

[0090] After drying with a hairdryer, the smoothness of the hair was evaluated subjectively according to the following criteria. 4: There are absolutely no issues. 3: Slightly smooth. 2: There is a slight catch. 1: It's very annoying.

[0091] [Table 1]

[0092] [Table 2]

[0093] [Table 3]

[0094] *1: Lubrizol Advanced Materials, Pemlen TR-1, effective amount 100% by mass *2: Manufactured by Daicel Corporation, HEC Daicel SE850K, effective amount 99.8% by mass *3: Manufactured by Kao Corporation, Emulgen 103, effective amount 100% by mass *4: Kao Corporation, Emanon CH-25, effective amount 97.3% by mass *5: Kao Corporation, Emulgen 409PV, effective amount 100% by mass *6: Kao Corporation, Emanon CH-60, effective amount 100% by mass *7: Kao Corporation, Emanon 3299RV, effective amount 100% by mass *8: Manufactured by Shin-Etsu Chemical Co., Ltd., silicone KF-56A (viscosity at 25°C, 15 mm 2 / s, effective amount 100% by mass *9: Manufactured by Shin-Etsu Chemical Co., Ltd., silicone KF-54P (viscosity at 25°C, 400 mm 2 / s, effective amount 100% by mass *10: Manufactured by Shin-Etsu Chemical Co., Ltd., silicone KF-96A-10cs (viscosity at 25°C, 10 mm 2 / s, effective amount 100% by mass *11: Manufactured by Sanyo Chemical Industries, Ltd., PEG-600(-G), number average molecular weight 600, effective amount 100% by mass *12: Manufactured by NOF Corporation, PEG#200, number average molecular weight 200, effective amount 100% by mass *13: Manufactured by Sanyo Chemical Industries, Ltd., PEG-1540(-G), number average molecular weight 1450, effective amount 100% by mass *14: Manufactured by Sanyo Chemical Industries, Ltd., PEG-4000S, number average molecular weight 3400, effective amount 99.99% by mass *15: Manufactured by Sanyo Chemical Industries, Ltd., PEG-20000S, number average molecular weight 20000, effective amount 100% by mass

Claims

1. The aerosol concentrate contains the following components (A) to (E), and the propellant contains component (F), The mass ratio of component (C) to component (D), (C) / (D), is between 0.1 and 5. Aerosol cosmetic for hair and / or scalp. (A) Acrylic acid / alkyl acrylate copolymer (B) Nonionic surfactants with an HLB of 8 to 12 (C) Phenyl-modified silicone (D) Polyalkylene glycols with a number-average molecular weight of 570 to 2000 (E) Water (F) Carbon dioxide

2. The aerosol cosmetic composition according to claim 1, wherein the content of component (A) in the aerosol concentrate is 0.05% by mass or more and 2% by mass or less.

3. The aerosol cosmetic composition according to claim 1, wherein the content of component (B) in the aerosol concentrate is 0.05% by mass or more and 10% by mass or less.

4. The aerosol cosmetic composition according to claim 1, wherein the content of component (C) in the aerosol concentrate is 0.01% by mass or more and 1% by mass or less.

5. The aerosol cosmetic composition according to claim 1, wherein the content of component (D) in the aerosol concentrate is 0.01% by mass or more and 5% by mass or less.

6. The aerosol cosmetic composition according to claim 1, wherein the total content of oils in the aerosol concentrate is 10% by mass or less.

7. A treatment method comprising dispensing the aerosol cosmetic composition according to any one of claims 1 to 6 from an aerosol container onto moist hair and / or scalp, optionally massaging, and drying without rinsing.

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