Aqueous composition containing a vesicle composition

Abstract

To provide an aqueous composition that is excellent in the stability of a vesicle composition containing a cationic surfactant in the presence of a high-concentration lower alcohol.SOLUTION: The present invention provides an aqueous composition containing a vesicle composition, the aqueous composition containing the following (A) to (D): (A) a cationic surfactant, (B) one or more kinds selected from the group consisting of cholesterol, phytosterol and ceramide, (C) lower alcohol 50 mass% or more, and (D) water-soluble moisturizing component, wherein the total content of the components (C) and (D) [(C)+(D)] is 64 mass% or more, wherein the components (A) and (B) are the main components.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an aqueous composition containing a vesicle composition. [Background technology]

[0002] Vesicle compositions have been widely used in cosmetics and topical skin preparations that are applied topically to the skin and hair as a method for improving the penetration of active ingredients into the tissues and a method for stably incorporating water-insoluble active ingredients into aqueous solvents. To date, vesicle compositions combining various ingredients have been proposed, including vesicle compositions stably incorporating carotenoids that are susceptible to oxidative degradation, and vesicle compositions incorporating polypeptides primarily composed of basic amino acids (see, for example, Patent Documents 1 and 2). These vesicle compositions contain cationic surfactants, and are reported to have excellent skin and hair permeability and to enhance the penetration of active ingredients. On the other hand, lower alcohols such as ethanol are excellent solvents because they can dissolve various components, and because they have astringent effects that tighten the skin and a refreshing effect that provides a refreshing feeling, they are incorporated into various compositions such as beverages and cosmetics. For example, in order to improve the quick-drying properties of hair after washing, a hair conditioner containing 50 to 90% by mass of high-concentration ethanol, a water-soluble thickener, and a conditioning agent has been proposed (see, for example, Patent Document 3). Compositions combining cationic surfactants and lower alcohols such as ethanol have been proposed, but no technology has been reported that uses a cationic surfactant as a vesicle composition in combination with a high concentration of lower alcohol. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-185936 [Patent Document 2] International Publication No. 2014 / 069631 [Patent Document 3] JP 2007-153806 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the techniques of Patent Documents 1 and 2 make no mention of the occurrence of precipitates due to destabilization of the vesicle composition when a vesicle composition containing a cationic surfactant is combined with a high concentration of a lower alcohol. Although Patent Document 3 is excellent in quick-drying the hair after washing, the hair repair effect may be insufficient in some cases, and it is desired to further improve it. Furthermore, Patent Document 3 also does not mention the occurrence of precipitates due to the destabilization of the vesicle composition when a vesicle composition containing a cationic surfactant is combined with a high concentration of a lower alcohol.

[0005] Therefore, the present invention has discovered a new problem that the stability of a vesicle composition decreases and precipitates form in an aqueous composition containing a vesicle composition whose main components are a cationic surfactant and one or more components selected from the group consisting of cholesterol, phytosterols, and ceramides, and a high concentration of a lower alcohol of 50% by mass or more.The present invention aims to provide an aqueous composition in which precipitation is suppressed and the vesicle composition has excellent stability by using a water-soluble moisturizing component in addition to the vesicle composition. [Means for solving the problem]

[0006] In view of these circumstances, the present inventors have conducted extensive research and found that the stability of a vesicle composition containing a cationic surfactant can be improved by using a water-soluble moisturizing component in the presence of a high concentration of a lower alcohol. That is, the present invention has been accomplished by finding that the stability of a vesicle composition containing a cationic surfactant and one or more members selected from the group consisting of cholesterol, phytosterols, and ceramides can be improved by setting the total content of the lower alcohol and the water-soluble moisturizing component to 64% by mass or more in an aqueous composition containing 50% by mass or more of a lower alcohol and a water-soluble moisturizing component.

[0007] That is, the present invention is as follows. [1] The following (A)~(D); (A) Cationic surfactant (B) one or more selected from the group consisting of cholesterol, phytosterols, and ceramides (C) Straight or branched chain with 2 to 5 carbon atoms Alcohol 50% or more by mass (D) One or more selected from the group consisting of polyhydric alcohols, polyoxyalkylene alkyl glucosides, glycerin derivatives represented by the following general formula (1), polyoxyalkylene-added glycerins, and polyoxyalkylene-added diglycerins: The aqueous composition contains the above-mentioned vesicle composition, wherein the total content of the components (C) and (D) [(C) + (D)] is 64 mass% or more, and the aqueous composition contains the above-mentioned vesicle composition having the components (A) and (B) as main components. TIFF0007763614000001.tif16160 Formula (1) (In formula (1), Gly is a residue obtained by removing a hydroxyl group from glycerin, PO is an oxypropylene group, EO is an oxyethylene group, l and m are the average number of moles of PO and EO added, respectively, (l+m) is a value of 1 to 60, the mass ratio (PO / EO) is 1 / 5 to 5 / 1, BO is an oxyalkylene group having 4 carbon atoms, and n is the average number of moles of BO added, which is a value of 0 to 5.) [2] The above-mentioned component (A) is one or two cationic surfactants selected from the group consisting of dicocoyl ethyl hydroxyethylmonium methosulfate and dipalmitoyl ethyl hydroxyethylmonium methosulfate. 〔 1 〕 The aqueous composition according to claim 1. [3] The component (D) is one or more selected from the group consisting of glycerin, diglycerin, triglycerin (polyglycerin-3), 1,3-butylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polyethylene glycol, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, polyoxyethylene ethyl glucoside, polyoxypropylene ethyl glucoside, polyoxybutylene (3), polyoxyethylene (8), polyoxypropylene (5) glyceryl ether, polyoxyethylene glycerin, and polypropylene-adducted diglyceryl represented by the following general formula (2): The aqueous composition according to [1] or [2] above. TIFF0007763614000002.tif20143 Formula (2) (In formula (2), R is -[CH 2 CH(CH 3 )O]-, where p, q, r, and s each represent an integer of 0 to 20, and p+q+r+s represents an integer of 4 to 20). [4] The aqueous composition according to any one of [1] to [3] above, wherein the content of the component (D) is 1 to 40 mass %. [5] The aqueous composition according to any one of [1] to [4] above further contains a component (E) an organic acid or a salt thereof. [6] The aqueous composition according to any one of [1] to [5] above, wherein the mass ratio of the components (C) and (D) [(C) / (D)] is 1 to 70. [7] The aqueous composition according to any one of [1] to [6] above has a pH of 4.3 to 7.0 at 25°C. [8] A hair cosmetic comprising the aqueous composition according to any one of [1] to [7] above.

[0008] In addition, the present technology can further adopt the following configurations. [9] The aqueous composition according to any one of [5] to [8] above, wherein the component (E) is one or more selected from the group consisting of citric acid, succinic acid, and salts thereof.

[10] A method for improving the stability of an aqueous composition comprising one or more species selected from the group consisting of a cationic surfactant, cholesterol, phytosterols, and ceramides, 50% by mass or more of a lower alcohol, and a water-soluble moisturizing component, wherein the cationic surfactant and the one or more species selected from the group consisting of cholesterol, phytosterols, and ceramides are a vesicle composition, the method comprising adding the total content of the lower alcohol and the water-soluble moisturizing component to the aqueous composition so that the total content of the lower alcohol and the water-soluble moisturizing component is 64% by mass or more.

[11] A method for inhibiting aggregation or precipitation of a vesicle composition, comprising an aqueous composition containing one or more species selected from the group consisting of a cationic surfactant, cholesterol, phytosterols, and ceramides, 50% by mass or more of a lower alcohol, and a water-soluble moisturizing component, wherein the cationic surfactant and the one or more species selected from the group consisting of cholesterol, phytosterols, and ceramides constitute a vesicle composition, the method comprising adding the lower alcohol and the water-soluble moisturizing component to the aqueous composition in a total amount of 64% by mass or more. [Effects of the Invention]

[0009] In the present invention, the stability of the vesicle composition containing a cationic surfactant is excellent even in the presence of a high concentration of lower alcohol. Furthermore, when applied to hair, the high concentration of lower alcohol makes the composition blend well with the hair, and the penetration of the vesicle composition into the hair results in an excellent hair repair effect (treatment effect) for damaged hair. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described. However, the present invention is not limited to the following embodiments. In this specification, the term "X to Y" indicating a range includes X and Y and means "at least X and at most Y."

[0011] A vesicle is a closed endoplasmic reticulum having a bilayer membrane structure, and the term "vesicle composition" as used herein refers to a substance containing the vesicles in water. The formation of vesicles is indicated by the observation of a Maltese cross image under a polarizing microscope, or by the observation of a multilamellar vesicle having a multilayer structure under a transmission electron microscope.

[0012] The aqueous composition of the present invention refers to one in which an aqueous component is a continuous phase. As long as the aqueous component is a continuous phase, there are no particular limitations on the aqueous composition, and the aqueous composition may contain an oily agent. However, from the viewpoint of the stability of the vesicle composition, the content of the oily agent in the aqueous composition is preferably 1% by mass (hereinafter simply abbreviated as "%") or less, more preferably 0.5% or less, even more preferably 0.1% or less, and particularly preferably zero.

[0013] (Component (A): Cationic surfactant)

[0014] The cationic surfactant component (A) used in the present invention is a surfactant that undergoes ionization in water and has a structure containing a hydrophilic group exhibiting cationic properties and a hydrophobic group such as a fatty acid. There are no particular limitations on the type of surfactant, so long as it exhibits cationic properties in the composition. The cationic surfactant component (A) used in the present invention is not particularly limited as long as it is a cationic surfactant used in ordinary cosmetics, and examples thereof include quaternary ammonium salts, tertiary amines, fatty acid amidoamines and their neutralized products, and ester amines. Examples of structures containing hydrophobic groups such as fatty acids include mono-long-chain alkyl groups, di-long-chain alkyl groups, and ethylene oxide adducts. Examples of hydrophilic groups exhibiting cationic properties include ammonium salts and benzalkonium salts. Examples of counter ions include chloride ions, bromide ions, methyl sulfate ions, and ethyl sulfate ions.

[0015] In the present invention, bi-long-chain cationic surfactants are preferred from the viewpoint of their suitability as a main component for forming vesicles, and bi-long-chain cationic surfactants having an ester bond in two fatty acid chains and a hydrophobic chain are more preferred. Furthermore, from the viewpoint of excellent stability of the vesicle composition and excellent penetration into the interior of the hair when applied to hair, di-long-chain acylalkylhydroxyalkylammonium is even more preferred, and one or more cationic surfactants selected from the group consisting of dicocoyl ethyl hydroxyethylmonium methosulfate and dipalmitoyl ethyl hydroxyethylmonium methosulfate are particularly preferred. Commercially available products include DEHYQUART L80 T (manufactured by BASF; purity 80%), which is a mixture of dicocoyl ethyl hydroxyethylmonium methosulfate, and DEHYQUART AU56 / G and DEHYQUART C4046 (both manufactured by BASF), which are mixtures of dipalmitoyl ethyl hydroxyethylmonium methosulfate. These may be used alone or in combination of two or more.

[0016] The content of component (A) in the present invention is not particularly limited, but from the viewpoint of the stability of the vesicle composition, it is preferably 1 to 10%, more preferably 1.5 to 5%, in the vesicle composition. Also, the content of component (A) is not particularly limited, but from the viewpoint of the stability of the vesicle composition, it is preferably 0.01 to 10%, more preferably 0.05 to 10%, and even more preferably 0.05 to 5% in the aqueous composition.

[0017] (Component (B): one or more selected from the group consisting of cholesterol, phytosterols, and ceramides)

[0018] Component (B) used in the present invention, which is one or more selected from the group consisting of cholesterol, phytosterols, and ceramides, is a main component of the vesicle together with component (A) and contributes to the stability of the bilayer membrane structure.

[0019] The cholesterol and phytosterols of component (B) of the present invention are substances with a sterol skeleton and are preferred as base components for forming vesicle compositions, as they can improve the stability and treatment effects of the vesicle composition. Cholesterol is generally purified from natural products, and cholesterol purified from any natural product can be used in the present invention. Any phytosterol generally classified as a phytosterol (plant sterol) can be used, and preferred examples include those containing campesterol, sitosterol, stigmastanol, and the like as constituents. These components can be obtained by extracting grain germ with an organic solvent and removing the water-soluble portion, but commercially available products can also be purchased and used. Examples of these commercially available products include Kairei Marine Cholesterol (manufactured by Nippon Suisan Co., Ltd.) and Phytosterol QI (manufactured by Eisai Food & Chemical Co., Ltd.), and these may be used alone or in combination. The ceramides of component (B) are nonionic amphiphiles containing one or more long-chain linear and / or branched alkyl or alkenyl groups, at least two hydroxyl groups, and one or more amide (and / or amino) groups in the molecule, or derivatives in which a phosphatidylcholine residue or a sugar residue is bound to the hydroxyl group of the nonionic amphiphile. These may be natural extracts or synthetic products. Examples include natural ceramides such as sphingosine, phytosphingosine, and their long-chain fatty acid amides (ceramide 1, ceramide 2, ceramide 3, ceramide 4, ceramide 5, and ceramide 6); sphingophospholipids such as sphingomyelin and phytosphingomyelin, which are phospholipid derivatives of sphingosine and phytosphingosine; and glycosphingolipids and phytosphingolipids, such as cerebrosides and gangliosides, which are glycosides of these ceramides. These may be used alone or in combination. Among these, natural ceramides are preferred from the viewpoint of improving the stability, moisturizing effect, treatment effect, etc. of the vesicle composition, and ceramide 2 and ceramide 3 are particularly preferred. Examples of commercially available natural ceramides include Ceramide I, Ceramide III, and Ceramide VI (all manufactured by EVONIC), Ceramide TIC-001 (manufactured by Takasago International Corporation), CERAMIDE 2 (manufactured by Croda Japan), and CERAMIDE 3 (manufactured by Cosmopharm).

[0020] The content of component (B) in the present invention is not particularly limited, but is preferably 0.01 to 5%, more preferably 0.01 to 3%, in the vesicle composition from the viewpoints of the stability, moisturizing effect, treatment effect, etc. Furthermore, the content of component (B) is not particularly limited, but is preferably 0.001 to 1%, more preferably 0.002 to 0.5%, and even more preferably 0.003 to 0.1%, in the aqueous composition from the viewpoints of the stability, moisturizing effect, treatment effect, etc. of the vesicle composition.

[0021] In the present invention, there is a preferred content range for component (B), one or more selected from the group consisting of cholesterol, phytosterols, and ceramides. When component (B) is cholesterol and / or phytosterol, the content in the vesicle composition is preferably 0.01 to 5%, more preferably 0.01 to 3%, from the viewpoints of the stability and treatment effect of the vesicle composition. Furthermore, the content of component (B) in the aqueous composition is preferably 0.001 to 1%, more preferably 0.002 to 0.5%, and even more preferably 0.003 to 0.1%, from the viewpoints of the stability and treatment effect of the vesicle composition. When component (B) is a ceramide, the content in the vesicle composition is preferably 0.001 to 2%, more preferably 0.005 to 1%, from the viewpoints of the stability, moisturizing effect, treatment effect, and the like of the vesicle composition. Furthermore, the content of component (B) in the aqueous composition is preferably 0.0001 to 0.5%, more preferably 0.0005 to 0.1%, and even more preferably 0.001 to 0.01%, from the viewpoints of the stability, moisturizing effect, and treatment effect of the vesicle composition.

[0022] Furthermore, in the present invention, two or more types of component (B) can be combined. From the viewpoints of the stability, moisturizing effect, and treatment effect of the vesicle composition, a combination of cholesterol or phytosterol with ceramides is preferred. The content of cholesterol or phytosterol in the vesicle composition is preferably 0.001 to 5%, more preferably 0.01 to 3%. From the viewpoints of the stability, moisturizing effect, and treatment effect of the vesicle composition, the content of cholesterol or phytosterol in the aqueous composition is preferably 0.005 to 1%, more preferably 0.01 to 0.5%, and even more preferably 0.01 to 0.1%. From the viewpoints of the stability, moisturizing effect, and treatment effect of the vesicle composition, the content of ceramides in the vesicle composition is preferably 0.0001 to 2%, more preferably 0.005 to 1%. Furthermore, the content of ceramides in the aqueous composition is preferably 0.0001 to 0.5%, more preferably 0.0005 to 0.1%, and even more preferably 0.001 to 0.01%, from the viewpoints of the stability, moisturizing effect, and treatment effect of the vesicle composition.

[0023] In the present invention, components (A) and (B) form a vesicle composition. The method for preparing the vesicle composition is not particularly limited, and the composition can be produced by a conventional method. The vesicle composition can be confirmed by, for example, checking the presence or absence of a Maltese cross image under crossed Nicols using a polarizing microscope. The content of the vesicle composition in the aqueous composition is not particularly limited, but is preferably 0.001 to 25%, more preferably 0.1 to 10%. This range is preferred because it allows for more optimal hair treatment effects.

[0024] The average particle size of the obtained vesicles is preferably 50 to 500 nm, more preferably 100 to 200 nm, from the viewpoint of obtaining vesicles with excellent stability, in which the vesicle structure does not collapse over time and there is little change (increase) in the average particle size. The average particle size here is measured using a Coulter counter (Submicron Particle Analyzer N5, manufactured by Beckman Coulter, Inc.).

[0025] In addition to the essential components described above, the vesicle composition of the present invention may contain optional components typically incorporated into cosmetics or topical skin preparations, provided that the effects of the present invention are not impaired. For example, the vesicle composition may contain oils such as hydrocarbon oils, ester oils, silicone oils, waxes, and higher alcohols, aqueous film-forming agents such as lower alcohols, polyhydric alcohols, and water-soluble polymers, surfactants other than component (A), oil-soluble gelling agents, powders, resins, UV absorbers, preservatives, antibacterial agents, fragrances, antioxidants, pH adjusters, cooling agents, chelating agents, plant extracts, amino acids, sugars, vitamins, and other cosmetic ingredients.

[0026] The vesicles in the vesicle composition are dispersed in water, and the water is not particularly limited as long as it is commonly used in cosmetics, etc., but examples include purified water, hot spring water, ion-exchanged water, deep sea water, tap water, steam-distilled water from plants, etc., and one or more types can be appropriately selected and used as needed. In the present invention, the water content in the vesicle composition is not particularly limited, but is preferably 70 to 99%, more preferably 80 to 99%.

[0027] (Component (C): Lower alcohol)

[0028] The component (C) lower alcohol used in the present invention is a linear or branched alcohol having 2 to 5 carbon atoms, and any alcohol typically used in cosmetics can be used, although those having 1 to 3 carbon atoms are preferred. Specific examples include ethanol and isopropyl alcohol, with ethanol being particularly preferred from the standpoint of its refreshing feel and ease of blending into hair.

[0029] In the present invention, from the viewpoints of the stability and cool feeling of the vesicle composition, the content of component (C) in the aqueous composition is, as a lower limit, 50% or more, preferably 55% or more, more preferably 60% or more, and even more preferably 65% ​​or more. A suitable upper limit is, in the aqueous composition, preferably 90% or less, more preferably 85% or less, even more preferably 80% or less, even more preferably 75% or less, and particularly preferably 70% or less. From the viewpoints of the stability and cool feeling of the vesicle composition, a more suitable range for the content of component (C) in the aqueous composition is, in the viewpoints of the stability and cool feeling of the vesicle composition, preferably 50 to 90%, more preferably 50 to 80%, even more preferably 50 to 70%, even more preferably 55 to 70%, and particularly preferably 60 to 70%.

[0030] (Ingredient (D): Water-soluble moisturizing ingredient)

[0031] The water-soluble moisturizing component (D) used in the present invention is not particularly limited as long as it is water-soluble and can maintain the moisture content of the skin or hair, thereby contributing to moisturizing. Regarding the properties of the component (D), if the component (D) is solid, the moisturizing component (D) should dissolve in an amount of 0.01 g or more in 100 g of water at 25°C, and if the component (D) is liquid, it should be readily miscible with water and be uniformly mixed in any amount.

[0032] The water-soluble moisturizing component (D) of the present invention is a substance that retains moisture in the skin or hair and exerts a moisturizing effect, and in an aqueous composition of the present invention containing 50% or more of a lower alcohol, it can improve the stability of a vesicle composition whose main components are components (A) and (B).

[0033] The water-soluble moisturizing component (D) used in the present invention is not particularly limited, but examples thereof include plant extracts, water-soluble polymers, polyhydric alcohols, polyoxyalkylene alkyl glucosides, glycerin derivatives represented by the following general formula (1), polyoxyalkylene-added glycerin, and polyoxyalkylene-added diglyceryl. TIFF0007763614000003.tif16160 Formula (1) (In formula (1), Gly is a residue obtained by removing a hydroxyl group from glycerin, PO is an oxypropylene group, EO is an oxyethylene group, l and m are the average number of moles of PO and EO added, respectively, (l+m) is a value of 1 to 60, the mass ratio (PO / EO) is 1 / 5 to 5 / 1, BO is an oxyalkylene group having 4 carbon atoms, and n is the average number of moles of BO added, which is a value of 0 to 5.) In the present invention, from the viewpoint of the stability of the vesicle composition, it is preferable that component (D) is one or more selected from the group consisting of polyhydric alcohols, polyoxyalkylene alkyl glucosides, glycerin derivatives represented by general formula (1), polyoxyalkylene-added glycerins, and polyoxyalkylene-added diglycerins.

[0034] The polyhydric alcohol used in the present invention has a structure having two or more hydroxyl groups in the molecule. It is not particularly limited as long as it is one typically used in cosmetics, but examples include glycerin, diglycerin, polyglycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, 1,2-pentanediol, 1,2-hexanediol, 1,3-propanediol, sorbitol, and polyethylene glycol. Among these, glycerin, diglycerin, triglycerin (polyglycerin-3), 1,3-butylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, and polyethylene glycol (preferably having a number-average molecular weight of 200 to 800) are preferred from the viewpoint of being particularly suitable for the stability of the vesicle composition, and these may be used alone or in any combination of two or more.

[0035] The polyoxyalkylene alkyl glucoside used in the present invention is obtained by addition polymerization of an alkylene oxide to an alkyl glucoside. While not particularly limited as long as it is typically used in cosmetics, examples of the alkylene group include an ethylene group, a propylene group, a butylene group, etc., and the average number of moles of oxyalkylene group added is preferably 5 to 40, more preferably 10 to 20. Examples of the alkyl group include those having 1 to 4 carbon atoms, more preferably those having 1 to 2 carbon atoms, and even more preferably a methyl group having 1 carbon atom. In the present invention, from the viewpoints of non-stickiness and stability of the vesicle composition, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, polyoxyethylene ethyl glucoside, and polyoxypropylene ethyl glucoside are preferred, with polyoxyethylene methyl glucoside and polyoxypropylene methyl glucoside being more preferred. Specific examples include polyoxyethylene (10) methyl glucoside, in which the average number of moles of (EO) added is 10, polyoxyethylene (20) methyl glucoside, in which the average number of moles of (EO) added is 20, polyoxypropylene (10) methyl glucoside, in which the average number of moles of (PO) added is 10, and polyoxypropylene (20) methyl glucoside, in which the average number of moles of (PO) added is 20, and polyoxyethylene (10) methyl glucoside and polyoxypropylene (10) methyl glucoside are particularly preferred. Commercially available products include Macbiobride MG-10E, Macbiobride MG-20E, Macbiobride MG-10P (all manufactured by NOF Corporation), GLUCAME E-10 LFG, GLUCAME P-10 (all manufactured by LUBRIZOL ADVANCED MATERIALS), and the like, and these can be used alone or in combination of two or more.

[0036] The glycerin derivative represented by general formula (1) used in the present invention is obtained by adding propylene oxide and ethylene oxide to glycerin in a total amount of 3 to 180 molar equivalents relative to the glycerin, or by further adding an alkylene oxide having 4 carbon atoms in a total amount of 3 to 15 molar equivalents relative to the glycerin. The glycerin derivative represented by general formula (1) can be obtained by first synthesizing an adduct of PO and EO, and then adding an alkylene oxide having 4 carbon atoms in block form. TIFF0007763614000004.tif16160 Formula (1) (In formula (1), Gly is a residue obtained by removing a hydroxyl group from glycerin, PO is an oxypropylene group, EO is an oxyethylene group, l and m are the average number of moles of PO and EO added, respectively, (l+m) is a value of 1 to 60, the mass ratio (PO / EO) is 1 / 5 to 5 / 1, BO is an oxyalkylene group having 4 carbon atoms, and n is the average number of moles of BO added, which is a value of 0 to 5.)

[0037] The mass ratio (PO / EO) of propylene oxide (PO) and ethylene oxide (EO) in the glycerin derivative is 1 / 5 to 5 / 1, and the addition form of propylene oxide and ethylene oxide may be random or block.

[0038] The average number of moles of propylene oxide (PO) and ethylene oxide (EO) added in the glycerin derivative is 3 to 180 moles in total, i.e., l+m is in the range of 1 to 60. From the viewpoints of non-stickiness and stability of the vesicle composition, it is more preferable that the average number of moles of PO and EO added in total is 3 to 150 moles, i.e., l+m is in the range of 1 to 50, and it is even more preferable that the average number of moles of PO and EO added in total is 3 to 90 moles, i.e., l+m is in the range of 1 to 30.

[0039] The average number of moles of propylene oxide (PO) added to the glycerin derivative is preferably 6 to 90 moles, i.e., l is in the range of 2 to 30, and more preferably 15 to 75 moles, i.e., l is in the range of 5 to 25. This range is preferable because it improves the stability of the vesicle composition.

[0040] The average number of moles of alkylene oxide (BO) having 4 carbon atoms added to the glycerin derivative is preferably 0 to 15 moles, i.e., n is preferably in the range of 0 to 5, and the average number of moles of BO added is more preferably 3 to 15 moles, i.e., n is preferably in the range of 1 to 5.

[0041] In the present invention, when the average number of moles of alkylene oxide (BO) added having 4 carbon atoms is 0 moles, i.e., n is 0, the average number of moles of propylene oxide (PO) and ethylene oxide (EO) added is preferably 90 to 180 moles in total, i.e., l + m is in the range of 30 to 60. It is more preferable that the average number of moles of (PO) and (EO) added is 90 to 150 moles in total, i.e., l + m is in the range of 30 to 50. Furthermore, when the average number of moles of (BO) added is 1 to 5 moles, i.e., n is in the range of 1 to 5, it is preferable that the average number of moles of (PO) and (EO) added is 3 to 90 moles in total, i.e., l + m is in the range of 1 to 30. It is more preferable that the average number of moles of (PO) and (EO) added is 3 to 60 moles in total, i.e., l + m is in the range of 1 to 20. This range is preferable because it improves the stability of the vesicle composition.

[0042] Examples of the alkylene oxide having 4 carbon atoms in the glycerin derivative include 1,2-butylene oxide, 2,3-butylene oxide, tetramethylene oxide (tetrahydrofuran), etc. Among these, 1,2-butylene oxide is preferred from the viewpoints of availability and ease of reaction control.

[0043] Specifically, the glycerin derivative is preferably polyoxybutylene polyoxyethylene polyoxypropylene glyceryl ether (3BO)(8EO)(5PO), which has an average number of moles of (EO) added of 8, an average number of moles of (PO) added of 5, and an average number of moles of (BO) added of 3, because it improves the stability of the vesicle composition. Commercially available products include polyoxybutylene (3) polyoxyethylene (8) polyoxypropylene (5) glyceryl ether (trade name: Wilbride S-753, manufactured by NOF Corporation), and one or more of these may be used.

[0044] The polyoxyalkylene-added glycerin used in the present invention is obtained by addition polymerization of alkylene oxide to glycerin. The number of carbon atoms in the alkylene oxide is not particularly limited, but is preferably 2 to 4, more preferably 2 to 3. The degree of polymerization of the alkylene oxide is also not particularly limited, but is preferably 3 to 30, more preferably 9 to 26. Two or more alkylene oxides may be used, in which case they may be polymerized in any manner, such as block or random. In the present invention, the polyoxyalkylene-added glycerin is preferably polyoxyethylene glycerin, and more preferably polyoxyethylene glycerin (26EO) having an average number of added moles of (EO) of 26. An example of a commercially available product is LIPONIC EG-1 (manufactured by LIPO CHEMICALS INC.).

[0045] The polyoxyalkylene-added diglyceryl used in the present invention is obtained by addition polymerization of alkylene oxide to diglycerin. The number of carbon atoms in the alkylene oxide is not particularly limited, but is preferably 2 to 4, and more preferably 2 to 3. The degree of polymerization of the alkylene oxide is not particularly limited, but is preferably 3 to 30, and more preferably 9 to 26. Two or more types of alkylene oxide may be used, and in this case, any polymerized alkylene oxide, such as block or random, may be used.

[0046] From the viewpoint of the stability of the vesicle composition, the polyoxyalkylene-added diglyceryl is preferably a polypropylene-added diglyceryl represented by the following general formula (2). TIFF0007763614000005.tif20143 Formula (2) (In formula (2), R represents -[CH2CH(CH3)O]-, p, q, r, and s each represent an integer of 0 to 20, and p+q+r+s represents an integer of 4 to 20). The polypropylene-added diglyceryl represented by general formula (2) can be obtained by adding propylene oxide to diglycerin by a conventional method. Here, the number of moles of propylene oxide added per diglycerin molecule is preferably 4 to 20 moles, more preferably 5 to 15 moles, even more preferably 8 to 15 moles, and even more preferably 8 to 10 moles, from the viewpoints of non-stickiness and stability of the vesicle composition. Specifically, polyoxypropylene diglyceryl (9PO), in which the average number of moles of (PO) added is 9, is preferred because it further improves the stability of the vesicle composition. Commercially available products include polyoxypropylene (9) diglyceryl (trade name: SY-DP9, manufactured by Sakamoto Pharmaceutical Co., Ltd.).

[0047] From the viewpoint of the stability of the vesicle composition, the content of component (D) in the present invention is preferably 0.5% or more as a lower limit in the aqueous composition, more preferably 1% or more, even more preferably 4% or more, even more preferably 5% or more, and particularly preferably 6% or more. A suitable upper limit in the aqueous composition is preferably 50% or less, more preferably 40% or less, even more preferably 30% or less, even more preferably 25% or less, particularly preferably 20% or less, and more preferably 16% or less. From the viewpoint of the stability of the vesicle composition, a more suitable range for the content of component (D) in the aqueous composition is preferably 1 to 40%, more preferably 1 to 30%, even more preferably 4 to 30%, even more preferably 4 to 20%, and particularly preferably 6 to 16%.

[0048] The present invention provides an aqueous composition in which the stability of a vesicle composition is reduced by the coexistence of 50% or more of a lower alcohol with a vesicle composition in the aqueous composition, but the addition of component (D) can improve the stability of the vesicle composition. Therefore, in the present invention, it is important to adjust the balance between components (C) and (D), which are aqueous components in the aqueous composition, in order to improve the stability of the vesicle composition. In the present invention, the total content of components (C) and (D) [(C) + (D)] in the aqueous composition is 64% or more, from the viewpoint of the stability of the vesicle composition. A suitable lower limit in the aqueous composition is preferably 66% or more, more preferably 68% or more, and even more preferably 70% or more. A suitable upper limit in the aqueous composition is preferably 95% or less, more preferably 90% or less, even more preferably 85% or less, and particularly preferably 80% or less. Furthermore, from the viewpoint of the stability of the vesicle composition, a more preferred range of the total content of components (C) and (D) in the aqueous composition [(C) + (D)] is preferably 64 to 90%, more preferably 66 to 90%, even more preferably 68 to 90%, even more preferably 70 to 90%, particularly preferably 70 to 85%, and more preferably 70 to 80%.

[0049] The mass ratio of component (C) to component (D) [(C) / (D)] in the aqueous composition preferably has a lower limit of 1 or more, more preferably 2 or more, even more preferably 3 or more, and particularly preferably 3.5 or more. The upper limit of the mass ratio is preferably 70 or less, more preferably 67 or less, even more preferably 60 or less, even more preferably 50 or less, particularly preferably 30 or less, and more preferably 20 or less. From the viewpoint of the stability of the vesicle composition, the more preferred range of the mass ratio of component (C) to component (D) [(C) / (D)] in the aqueous composition is preferably 1 to 70, more preferably 2 to 67, even more preferably 3 to 50, even more preferably 3 to 30, particularly preferably 3 to 20, and more preferably 3.5 to 20.

[0050] Furthermore, for the stability of the vesicle composition, it is also important to adjust the balance between component (A), which is the main component of the vesicle composition, and components (C) and (D), which are aqueous components of the aqueous composition. The mass ratio of components (A), (C), and (D) [{(C) + (D)} / (A)] in the aqueous composition is preferably 200 or more, more preferably 300 or more, even more preferably 500 or more, particularly preferably 700 or more, more preferably 900 or more, and more preferably 910 or more. The upper limit in the aqueous composition is preferably 2000 or less, more preferably 1700 or less, even more preferably 1500 or less, even more preferably 1300 or less, particularly preferably 1200 or less, and more preferably 1100 or less. Furthermore, from the viewpoint of the stability of the vesicle composition, a more preferred range of the mass ratio of component (A), component (C), and component (D) in the aqueous composition [{(C)+(D)} / (A)] is preferably 500 to 2000, more preferably 700 to 1500, even more preferably 900 to 1500, even more preferably 900 to 1300, particularly preferably 910 to 1300, and more preferably 910 to 1200.

[0051] (Component (E): organic acid or its salt)

[0052] The aqueous composition of the present invention can further contain component (E) an organic acid or a salt thereof. By using component (E), the stability of the vesicle composition and the treatment effect are excellent.

[0053] The organic acid or salt thereof used as component (E) in the present invention is not particularly limited as long as it is one typically used in cosmetics, but examples thereof include citric acid, lactic acid, formic acid, acetic acid, oxalic acid, malic acid, tartaric acid, succinic acid, glycolic acid, aspartic acid, glutamic acid, polyglutamic acid, and salts thereof. Among these, from the viewpoint of improving the stability of the vesicle composition in the presence of a high concentration of lower alcohol, one or more selected from citric acid, succinic acid, and salts thereof are more preferred, and one or more selected from citric acid and salts thereof are even more preferred. Examples of salts of these organic acids include alkali metal salts such as sodium salts and potassium salts, and alkanolamine salts such as triethanolamine salts. In the present invention, from the viewpoint of the stability of the vesicle composition, the treatment effect, etc., component (E) of the present invention is preferably one or more selected from a combination of citric acid and a citrate, succinic acid and a succinate, or a phosphate and a phosphate, and specific examples include disodium monohydrogen phosphate, sodium dihydrogen phosphate, trisodium phosphate, sodium citrate, sodium succinate, dipotassium monohydrogen phosphate, potassium dihydrogen phosphate, tripotassium phosphate, potassium citrate, potassium succinate, etc. Furthermore, since the effects of the present invention are more suitably exhibited, citric acid and a citrate, or succinic acid and a succinate are more preferred, citric acid and a citrate are even more particularly preferred, and citric acid and sodium citrate are particularly preferred.

[0054] The content of component (E) in the present invention is not particularly limited, but from the viewpoints of the stability of the vesicle composition, the treatment effect, etc., it is preferably 0.005 to 2% in the aqueous composition, more preferably 0.1 to 2%, even more preferably 0.1 to 1%, even more preferably 0.2 to 0.5%, and particularly preferably 0.2 to 0.4%.

[0055] The pH of the aqueous composition of the present invention is not particularly limited, but from the viewpoint of achieving excellent stability and treatment effect of the vesicle composition, the pH at 25°C is preferably 3.5 to 7.5, more preferably 4.0 to 7.1, even more preferably 4.3 to 7.0, even more preferably 4.3 to 6.5, and particularly preferably 4.3 to 6.0.

[0056] In addition to the above components, the aqueous composition of the present invention may contain optional components contained in ordinary cosmetics and topical skin preparations, provided that the effects of the present invention are not impaired, such as water, oils, powders, polymers, film-forming agents, surfactants other than component (A), oil-soluble gelling agents, organically modified clay minerals, resins, colorants, UV absorbers, preservatives, antibacterial agents, fragrances, antioxidants, pH adjusters other than component (E), chelating agents, vitamins, cosmetic ingredients, etc. It is preferable that the proportion of aqueous components in the aqueous composition of the present invention is 90% or more.

[0057] The aqueous component may be any water or water-soluble component, and examples of water include purified water, hot spring water, ion-exchanged water, deep sea water, tap water, and steam-distilled water from plants, and one or more of these may be selected and used as needed. Examples of water-soluble components include moisturizing components such as component (C) and component (D).

[0058] The oil is not particularly limited as long as it is one that is commonly used in cosmetics and the like, and examples thereof include higher alcohols, hydrocarbon oils, ester oils, waxes, silicone oils, etc. In the present invention, the content of the oil in the present invention is not particularly limited, but from the viewpoints of the stability of the vesicle composition, the treatment effect, non-stickiness, etc., it is preferably 5% or less, more preferably 3% or less, even more preferably 1% or less, and particularly preferably zero, in the aqueous composition.

[0059] The aqueous composition of the present invention can be used as a cosmetic. Examples include skin care cosmetics such as lotion, emulsion, cream, eye cream, serum, massage agent, pack, hand cream, and body cream, as well as cosmetics such as hair rinse, hair treatment, hair essence, hair cream, hair foam, and hair spray. Among these, hair cosmetics such as hair rinse, hair treatment, hair essence, hair cream, hair foam, and hair spray are preferred because they allow the effects of the present invention to be realized. Hair cosmetics can be applied to hair and are effective whether or not they are rinsed off, but use without rinsing is more preferred from the viewpoint of optimally exerting the effects of the present invention.

[0060] The aqueous composition of the present invention can also be used as an external preparation for the skin. Examples include external liquid preparations, external gel preparations, creams, ointments, liniments, lotions, poultices, plasters, sprays, and aerosols. The methods of use thereof can be similar to those for the above-mentioned cosmetics.

[0061] The method for producing the aqueous composition of the present invention is not particularly limited, and the composition can be prepared by a conventional method. For example, components (A) and (B) and a portion of purified water are mixed at high temperature using a mechanical stirrer such as a homomixer or an azidespar, followed by cooling to prepare a vesicle composition. Components (C) and (D) are mixed with the remaining purified water, and the vesicle composition is then added and mixed to obtain an aqueous composition.

[0062] The aqueous composition of the present invention may be used as it is as a final cosmetic or topical skin preparation, or may be mixed with other ingredients to form a cosmetic or topical skin preparation.

[0063] The formulation of a cosmetic or topical skin preparation containing the aqueous composition of the present invention is not particularly limited, but may include aqueous, solubilized, oil-in-water, water-in-oil-in-water, and multi-layer formulations, with aqueous, solubilized, oil-in-water, and multi-layer formulations being preferred. Among these, when used as a cosmetic or topical skin preparation containing an aqueous composition, multi-layer formulations are preferred, and more specifically, multi-layer formulations consisting of two layers of the aqueous composition of the present invention and an oily composition are more preferred, and it is even more preferred to mix the two compositions immediately before use. Here, the oily composition refers to one in which oil is the continuous phase. There are no particular limitations on the formulation, as long as oil is the continuous phase.

[0064] Furthermore, the cosmetic or topical skin preparation containing the aqueous composition of the present invention can be in various forms, such as liquid, gel, cream, or mousse, with a liquid form being preferred for achieving the effects of the present invention. Here, "liquid" refers to a state that has fluidity at 25°C. Specifically, this refers to a viscosity measured at 25°C using a Brookfield rotational viscometer of 20,000 mPa s or less, preferably 10,000 mPa s or less, and more preferably 5,000 mPa s or less. [Example]

[0065] The present invention will be described in more detail below with reference to examples, which are not intended to limit the scope of the present invention. Unless otherwise specified, the blending amounts are expressed in mass % relative to the composition in which the component is contained.

[0066] Examples 1 to 34 and Comparative Examples 1 to 4: Aqueous Compositions The aqueous compositions shown in Tables 1 to 4 were prepared by the following production methods, and the stability and treatment effect of the vesicle compositions were evaluated according to the following evaluation methods. The results are also shown in Tables 1 to 4.

[0067] [Table 1] [Table 2] [Table 3] [Table 4] *1 DEHYQUART L80 T (essential content 80%, manufactured by BASF) Note 2: Kairei Marine Cholesterol (manufactured by Nippon Suisan Co., Ltd.) Note 3: Ceramide TIC-001 (Takasago International Corporation) Note 4: Phytosterol-QI (Tama Biochemical Co., Ltd.) *5 LIPONIC EG-1 (LIPO CHEMICALS INC.) Note 6: MacBioBrite MG-10E (NOF Corporation) Note 7: MacBio Bright MG-10P (NOF Corporation) Note 8: SY-DP9 (manufactured by Sakamoto Pharmaceutical Co., Ltd.)

[0068] (Manufacturing method) A. Components (1) to (5) were mixed at a high temperature of 80°C or higher and then cooled to obtain a vesicle composition. B. Components (6) to (21) were mixed uniformly, and A was added and mixed to obtain an aqueous composition.

[0069] (Evaluation Method 1) Stability of Vesicle Composition To confirm the stability of the aqueous compositions, a storage test was conducted on the vesicle compositions. Examples 1 to 34 and Comparative Examples 1 to 4 were stored in a thermostatic chamber at 5°C for one day, and the presence or absence of precipitates was visually determined using the following criteria. <Judgment criteria> [Judgment]:[Evaluation] ◎: No precipitates observed ○: Precipitation is observed immediately after removal, but no precipitation is observed when returned to room temperature ×: Precipitation was observed immediately after removal, and precipitates were also observed when the container was returned to room temperature.

[0070] (Evaluation method 2) Treatment effect Ten cosmetic evaluation experts were asked to apply 1 mL of each sample from the Examples and Comparative Examples to their hair, and each person evaluated the treatment effect without rinsing it off on a three-point scale according to the following evaluation criteria and the evaluation method described below. <Evaluation criteria> 3-level evaluation criteria: [Score]:[Evaluation result] 5 points: After use, hair feels very soft 4 points: Hair feels supple after use 3 points: After use, hair feels slightly softer 2 points: After use, hair feels slightly less supple 1 point: Hair does not feel supple after use <Judgment criteria> [Judgment method]: [Average score] ◎: 4.0 or higher ○: 3.0 or more and less than 4.0 ×: Less than 3.0

[0071] As is clear from the results in Tables 1 to 4, the aqueous compositions of Examples 1 to 34 of the present invention were superior to the aqueous compositions of Comparative Examples 1 to 4 in terms of the stability of the vesicle composition and the treatment effect.

[0072] In contrast, in Comparative Examples 1, 3, and 4, in which the total content of components (C) and (D) was less than 64%, and in Comparative Example 2, which did not contain component (C), precipitates were observed, and the stability of the vesicle composition was not satisfactory.Furthermore, the treatment effect was also not satisfactory.

[0073] Example 35: Two-layer hair oil for after-bath use aqueous composition (component) (mass%) 1. Dicocoyl ethyl hydroxyethylmonium methosulfate Note 1 0.08 2. Cholesterol Note 2 0.02 3. Ethanol 60 4. Propylene Glycol 16 5. Citric acid 0.16 6. Sodium citrate 0.04 7. Keratin Hydrolysate Note 9 0.4 8. Remaining purified water Note 9 PROMOIS WK-GBF (Seiwa Kasei Co., Ltd.) oily composition (component) (mass%) 9. Dimethicone (kinematic viscosity at 25°C 10m 2 / s) remaining amount 10. Highly Polymerized Dimethicone Note 10 10 11. Hydrogenated polyisobutene 20 12. Mineral oil 10 13. Dimethiconol Note 11 5 14. Decyltetradecanol 5 15. Olive fatty acid ethyl ester 0.1 16. Jojoba Seed Oil 1 17. Meadowfoam Oil 1 18. Olive Fruit Oil 1 19.Fragrance 0.5 20. Preservatives 0.1 Note 10 BY11-007 (Dow Corning Toray Co., Ltd.) Note 11 XF49-C2497 (Momentive Performance Materials Japan)

[0074] (Manufacturing method) aqueous composition A: Components 1 and 2 and a portion of component 8 were mixed at a high temperature of 80°C or higher and then cooled to obtain a vesicle composition. The total content of components (C) and (D) [(C) + (D)] in the aqueous composition contained in the two-layered leave-in-bath hair oil was 76%, and the pH at 25°C was 4.3. B: The vesicle composition prepared in A and components 3 to 8 were mixed uniformly to obtain an aqueous composition. oily composition C: Components 9 to 20 were mixed uniformly at room temperature to obtain an oily composition. Two-layered hair oil for after-bath use D: The aqueous composition and oily composition were filled into a container in a weight ratio of 1:3 to obtain a two-layered leave-in hair oil.

[0075] The two-layered leave-in-bath hair oil of Example 35 obtained as described above also had excellent stability of the vesicle composition and also had an excellent treatment effect.

[0076] Example 36: Hair mist for after-bath use (component) (mass%) 1. Dicocoyl ethyl hydroxyethylmonium methosulfate Note 1 0.03 2. Dipalmitoyl ethyl hydroxyethylmonium methosulfate Note 12 0.02 3. Cholesterol Note 2 0.01 4. Ceramide 2 Note 3 0.001 5. Ceramide 3 Note 13 0.001 6. Ethanol 60 7. Propylene Glycol 16 8. Polyoxyethylene (40 moles added) hydrogenated castor oil 0.5 9. Keratin Hydrolysate Note 9 0.1 10. Olive fatty acid ethyl ester 0.1 11. Citric acid 0.1 12. Sodium citrate 0.02 13. Polyacrylate phosphorylcholine glycol 0.1 14. Polyquaternium-65 0.1 15. Jojoba seed oil 0.01 16. Meadowfoam oil 0.01 17. Olive oil 0.01 18.Fragrance 0.05 19. Preservatives 0.2 20. Remaining purified water Note 12 DEHYQUART AU-56 / G (manufactured by Cognis) Note 13 CERAMIDE3 (Cosmo Farm)

[0077] (Manufacturing method) A: Components 1 to 5 and a portion of component 20 were mixed at a high temperature of 80°C or higher and then cooled to obtain a vesicle composition. B: Components 6, 7, 11, and 12 were dissolved uniformly in component 20. C: Components 8, 10, and 13 to 19 were heated to 50°C and dissolved uniformly. D: C was added to B and mixed. E: D was cooled, and the vesicle composition prepared in A and component 9 were added and mixed, and then the mixture was filled into a container to obtain an after-bath hair mist.

[0078] The leave-in-bath hair mist of Example 36 obtained as described above was excellent in the stability of the vesicle composition and in the treatment effect. The total content of components (C) and (D) in the leave-in hair mist [(C) + (D)] was 66%, and the pH at 25°C was 4.7.

[0079] Example 37: Lotion (component) (mass%) 1. Dicocoyl ethyl hydroxyethylmonium methosulfate Note 1 0.05 2. Cholesterol oleate 0.05 3. POE (30 moles added) phytosterol ether 0.3 4. Cholesterol Note 2 0.1 5. Ethanol 50 6. Dipropylene Glycol 10 7. Diglycerin 3 8. 1,3-Butylene Glycol 2 9. Glycine 1 10. Theanine 1 11. Niacinamide 6 12. Astaxanthin 0.001 13. Tocopherol 0.05 14. Citric acid 0.1 15. Sodium citrate 0.02 16. Preservatives 0.2 17.Fragrance 0.03 18. Remaining purified water

[0080] (Manufacturing method) A: Components 1 to 4 and a portion of component 15 were mixed at a high temperature and then cooled to obtain a vesicle composition. B: The lotion was obtained by uniformly mixing the vesicles prepared in A with ingredients 5 to 18.

[0081] The lotion of Example 37 obtained as described above had excellent stability of the vesicle composition, smoothed the skin, and had an excellent treatment effect. The total content of components (C) and (D) in the lotion [(C)+(D)] was 65% by mass, and the pH at 25°C was 5.5.

Claims

1. The following (A) to (D): (A) Cationic surfactant (B) one or more selected from the group consisting of cholesterol, phytosterols, and ceramides (C) 50% by mass or more of a linear or branched alcohol having 2 to 5 carbon atoms (D) one or more selected from the group consisting of polyhydric alcohols, polyoxyalkylene alkyl glucosides, glycerin derivatives represented by the following general formula (1), polyoxyalkylene-added glycerins, and polyoxyalkylene-added diglycerins: The aqueous composition contains the above-mentioned vesicle composition, wherein the total content of the components (C) and (D) [(C) + (D)] is 64 mass% or more, and the aqueous composition contains a vesicle composition having the components (A) and (B) as main components. Formula (1) (In formula (1), Gly is a residue obtained by removing a hydroxyl group from glycerin, PO is an oxypropylene group, EO is an oxyethylene group, l and m are the average number of moles of PO and EO added, respectively, (l+m) is a value of 1 to 60, the mass ratio (PO / EO) is 1 / 5 to 5 / 1, BO is an oxyalkylene group having 4 carbon atoms, and n is the average number of moles of BO added, which is a value of 0 to 5.)

2. 2. The aqueous composition of claim 1, wherein component (A) is one or two cationic surfactants selected from the group consisting of dicocoyl ethyl hydroxyethylmonium methosulfate and dipalmitoyl ethyl hydroxyethylmonium methosulfate.

3. The aqueous composition according to claim 1, wherein component (D) is one or more selected from the group consisting of glycerin, diglycerin, triglycerin (polyglycerin-3), 1,3-butylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polyethylene glycol, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, polyoxyethylene ethyl glucoside, polyoxypropylene ethyl glucoside, polyoxybutylene (3) polyoxyethylene (8) polyoxypropylene (5) glyceryl ether, polyoxyethylene glycerin, and polypropylene-adducted diglyceryl represented by the following general formula (2): Formula (2) (In formula (2), R represents —[CH 2 CH(CH 3 )O]—, p, q, r, and s each represent an integer of 0 to 20, and p+q+r+s represents an integer of 4 to 20).

4. The aqueous composition according to any one of claims 1 to 3, wherein the content of the component (D) is 1 to 40 mass%.

5. The aqueous composition according to any one of claims 1 to 4, further comprising a component (E) an organic acid or a salt thereof.

6. 6. The aqueous composition according to claim 1, wherein the mass ratio of the components (C) and (D) [(C) / (D)] is 1 to 70.

7. 7. The aqueous composition according to claim 1, wherein the pH at 25° C. is 4.3 to 7.

0.

8. A hair cosmetic comprising the aqueous composition according to any one of claims 1 to 7.

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