Oil-in-water emulsion composition

Abstract

To provide an oil-in-water emulsion composition that spreads smoothly, does not feel sticky, imparts gloss to the skin after application, and delivers excellent moisturizing effects.SOLUTION: An oil-in-water emulsion composition contains following components (A), (B), (C), (D) and (E): (A) ceramide, (B) C12-22 higher alcohol, (C) N-acylamino acid ester, (D) a sugar alcohol 1-20 mass%, and (E) water.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to an oil-in-water emulsion composition. [Background technology]

[0002] Emulsion compositions having high moisturizing effects and excellent usability have been investigated. For example, Patent Document 1 describes that a skin care method using an emulsion composition containing an oily component having a melting point of 20 to 150°C and an aerosol composition containing a water-soluble thickener, water, and carbon dioxide gas reduces stickiness, improves spreadability and compatibility with the skin, and improves the moisturizing feeling. Patent Document 2 describes that an emulsion composition containing a specific organic compound having two or more hydroxyl groups, a specific organic compound having one hydroxyl group, ceramides, a nonionic surfactant with an HLB of 10 or more, and a sugar alcohol has high moisture retention ability and allows moisture to remain on the skin for a long time. Patent Document 3 describes that an oil-in-water emulsion composition containing a propylene polymer, a hydrocarbon oil, and a paste-like ester oil is non-sticky, has an effect of suppressing transepidermal water loss, and has excellent stability over time at low temperatures. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-200282 A [Patent Document 2] JP 2011-32265 A [Patent Document 3] JP 2016-79183 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional emulsion compositions provide a moisturizing feeling, but the moisturizing feeling is not sufficient, and they are unable to provide a lustrous look to the skin after application. Furthermore, when applied to a wide area of ​​the body, the spreadability and non-stickiness of the composition are not satisfactory. [Means for solving the problem]

[0005] The present inventors have found that by using a combination of a ceramide, a higher alcohol having 12 to 22 carbon atoms, an N-acylamino acid ester, and a sugar alcohol, it is possible to obtain an oil-in-water emulsion composition which has good spreadability, is not sticky, can be easily applied over a wide area, gives a lustrous finish to the skin after application, and has an excellent moisturizing effect.

[0006] The present invention comprises the following components (A), (B), (C), (D) and (E): (A) Ceramides, (B) a higher alcohol having 12 to 22 carbon atoms, (C) N-acyl amino acid ester, (D) 1 to 20% by mass of a sugar alcohol, (E)Water The present invention relates to an oil-in-water emulsion composition comprising: Effect of the Invention

[0007] The oil-in-water emulsion composition of the present invention spreads well, is not sticky, can be easily applied over a wide area, gives luster to the skin after application, and has an excellent moisturizing effect. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Examples of the ceramides of component (A) used in the present invention include natural ceramides such as ceramides 1, 2, 3, 4, 5, 6, and 7, sphingosine derivatives such as phytosphingosine, and ceramide-like structural substances described in JP-A-62-228048, JP-A-63-216812, JP-A-63-227513, JP-A-64-29347, JP-A-64-31752, and JP-A-8-319263. Specific examples of ceramide-like structural substances that can reduce stickiness on the skin after application and improve moisturizing effects include compounds represented by the following general formulas (1) and (2).

[0009] [ka]

[0010] [In the formula, R 1b is a hydrocarbon group having 10 to 26 carbon atoms, R 2b represents a hydrocarbon group having 9 to 25 carbon atoms, and X is -(CH2) n - (where n is an integer from 2 to 6).

[0011] [ka]

[0012] (In the formula, R 1 and R 2 are the same or different and each represents a hydrocarbon group having 1 to 40 carbon atoms which may be hydroxylated, and R 3 represents an alkylene group having 1 to 6 carbon atoms or a single bond; R 4 represents a hydrogen atom, an alkoxy group having 1 to 12 carbon atoms, or a 2,3-dihydroxypropyloxy group, provided that R 3 When is a single bond, R 4 is a hydrogen atom.)

[0013] In the general formulas (1) and (2), the hydrocarbon group is preferably an alkyl group or an alkenyl group. An example of a compound of general formula (1) is N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanamide, and an example of a compound of general formula (2) is long-chain dibasic acid bis-3-methoxypropylamide.

[0014] From the viewpoints of reducing stickiness on the skin after application and improving the moisturizing effect, component (A) preferably contains one or more types selected from natural ceramides, sphingosines, and the compounds represented by the general formulas (1) and (2), more preferably contains one or more types selected from natural ceramides, sphingosines, and the compounds represented by the general formula (1), even more preferably contains one or more types selected from natural ceramides, phytosphingosine, and N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanamide, and even more preferably contains N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanamide.

[0015] Component (A) may be used alone or in combination with two or more other types. From the viewpoint of reducing stickiness on the skin after application and improving the moisturizing effect, the content is preferably from 0.001 to 10 mass%, more preferably from 0.01 to 5 mass%, and even more preferably from 0.1 to 3 mass%, of the total composition.

[0016] From the viewpoints of improving spreadability during application and facilitating application over a wide area, the higher alcohol having 12 to 22 carbon atoms in component (B) preferably has 14 to 20 carbon atoms, and more preferably has 16 to 18 carbon atoms. Examples of higher alcohols having 12 to 22 carbon atoms in component (B) include myristyl alcohol, cetanol, stearyl alcohol, behenyl alcohol, and oleyl alcohol. Of these, from the viewpoint of improving spreadability during application and facilitating application over a wide area, it is preferable to include one having a linear alkyl group, and it is more preferable to include one or more selected from cetanol and stearyl alcohol.

[0017] Component (B) may be used alone or in combination with two or more other types. From the viewpoint of improving spreadability during application and facilitating application over a wide area, the content is preferably 0.01 to 10 mass % of the total composition, more preferably 0.1 to 5 mass %, and even more preferably 0.5 to 2 mass %.

[0018] In the N-acylamino acid ester of component (C), the acyl group preferably has 10 to 30 carbon atoms, more preferably 12 to 18 carbon atoms. The acyl group may be saturated or unsaturated. For example, 2-ethylhexanoyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, behenoyl group, oleoyl group, isostearoyl group, linolenoyl group, etc. are mentioned, myristoyl group and lauroyl group are preferable, and lauroyl group is more preferable. The acyl group may be derived from a mixed fatty acid, and cocoyl fatty acid ester, palm oil fatty acid ester, palm kernel oil fatty acid ester, sunflower seed oil fatty acid ester, macadamia nut oil fatty acid ester are preferable, and cocoyl fatty acid ester and palm kernel oil fatty acid ester are more preferable.

[0019] In the N-acylamino acid ester, the amino acid portion is an acidic amino acid, a neutral amino acid, or a basic amino acid, preferably an acidic amino acid or a neutral amino acid, more preferably an acidic amino acid. More specifically, glutamic acid, aspartic acid, alanine, arginine, glycine, N-methylalanine, histidine, serine, threonine, sarcosine, etc. are preferred, glutamic acid, aspartic acid, alanine, N-methylalanine, sarcosine are more preferred, and glutamic acid is even more preferred.

[0020] Moreover, the N-acylamino acid ester is preferably an alkyl ester of an N-acylamino acid. The alkyl group constituting the alkyl ester preferably has 1 to 30 carbon atoms, more preferably 12 to 18 carbon atoms. Moreover, the alkyl group may have a branched, straight chain, or cyclic structure. For example, suitable examples include an octyl group, a lauryl group, a cetyl group, a stearyl group, an isostearyl group, a behenyl group, an octyldodecyl group, a campesteryl group, a phytosteryl group such as a sitosteryl group, a cholesteryl group, and a decyltetradecyl group. In addition, the N-acylamino acid ester is preferably a diester rather than a monoester. N-acyl glutamic acid diester and N-acylaspartic acid diester are more preferred, and N-lauroyl glutamic acid diester is even more preferred. The alkyl groups present in one diester molecule may be the same or different, but are preferably two or more types.

[0021] In the present invention, examples of N-acyl amino acid esters include di(cholesteryl / behenyl / octyldodecyl) N-lauroyl-L-glutamate, di(cholesteryl / octyldodecyl) N-lauroyl-L-glutamate, di(phytosteryl / behenyl / octyldodecyl) N-lauroyl-L-glutamate, di(phytosteryl / octyldodecyl) N-lauroyl-L-glutamate, di(phytosteryl / octyldodecyl) N-lauroyl-L-glutamate, di(phytosteryl / octyldodecyl) N-lauroyl-L-glutamate, and N-myristoyl-N-methylalanine (phytosteryl / decyltetradecyl) and the like. Among these, it is preferable to include one or more selected from di(cholesteryl / octyldodecyl) N-lauroyl-L-glutamate and di(phytosteryl / octyldodecyl) N-lauroyl-L-glutamate, and it is more preferable to include di(phytosteryl / octyldodecyl) N-lauroyl-L-glutamate.

[0022] From the viewpoints of improving spreadability upon application and enhancing skin luster after application, component (C) preferably has a viscosity at 25°C of 100,000 mPa·s or less, more preferably 50,000 mPa·s or less, even more preferably 10,000 mPa·s or less, and even more preferably 5,000 mPa·s or less. Here, the viscosity is measured by a Brookfield type viscometer, for example, a single cylinder type rotational viscometer Vistron VS-A1 (manufactured by Shibaura Systems Co., Ltd.).

[0023] Commercially available N-acyl amino acid esters include "ELDEW PS-203 (viscosity: 1,200 mPa·s)," "Plandool-LG2" (N-lauroyl-L-glutamic acid di(phytosteryl / octyldecyl)), "ELDEW CL-301" (N-lauroyl glutamic acid di(cholesteryl / behenyl / octyldodecyl)), and "ELDEW CL-202" (N-lauroyl glutamic acid di(cholesteryl / behenyl / octyldodecyl)), all of which are sold by Ajinomoto Co., Inc. and Nippon Fine Chemical Co., Ltd. Examples of such glyceryl esters include "ELDEW PS-304", "ELDEW PS-306 (viscosity: 140,000 mPa·s)", "Plandool-LG1", "Plandool-LG3", and "Plandool-LG4" (N-lauroylglutamic acid di(phytosteryl / behenyl / octyldodecyl)), and "ELDEW APS-307" (N-myristoyl-N-methylalanine (phytosteryl / decyltetradecyl)).

[0024] Component (C) may be used alone or in combination with other types, and from the viewpoints of improving spreadability upon application, reducing stickiness on the skin after application, improving ease of application over a wide area, improving skin luster after application, and improving the moisturizing effect on the skin after application, the content is preferably 0.1 to 10 mass%, more preferably 0.2 to 5 mass%, even more preferably 0.3 to 4 mass%, and even more preferably 0.7 to 2 mass% of the total composition.

[0025] In the present invention, the mass ratio (A) / (C) of component (A) to component (C) is preferably 0.01 to 10, more preferably 0.1 to 5, and even more preferably 0.6 to 1.5, from the viewpoints of improving spreadability upon application, reducing stickiness on the skin after application, improving ease of application over a wide area, improving skin luster, and improving the moisturizing effect on the skin after application.

[0026] The sugar alcohol of component (D) is obtained by reducing the reducing group (aldehyde group or ketone group) of a sugar having a reducing group to an alcohol group. Examples of sugar alcohols include xylitol, lactitol, paraben, sorbitol, maltitol, mannitol, erythritol, trehalose, glucosyl trehalose, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, and other polyoxyalkylene alkyl glucosides. Of these, from the viewpoints of improving the luster after application and improving the moisturizing effect on the skin, it is preferable to contain one or more selected from sorbitol, maltitol and trehalose, and it is more preferable to contain sorbitol.

[0027] Component (D) may be used alone or in combination with other types, and from the viewpoints of improving spreadability upon application, reducing stickiness on the skin after application, improving ease of application over a wide area, improving skin luster after application, and improving the skin moisturizing effect, the content is preferably 1 to 20 mass% of the total composition, more preferably 1.5 to 15 mass%, even more preferably 2.5 to 10 mass%, and even more preferably 3 to 6 mass%.

[0028] In the present invention, the mass ratio (C) / (D) of component (C) to component (D) is preferably 0.05 to 5, more preferably 0.1 to 1, and even more preferably 0.19 to 0.62, from the viewpoints of improving spreadability upon application, reducing stickiness on the skin after application, improving ease of application over a wide area, improving skin luster, improving skin luster after application, and improving the moisturizing effect on the skin after application.

[0029] In the present invention, from the viewpoints of improving spreadability during application, improving ease of application over a wide area, and improving storage stability, the content of water in the component (E) is preferably 25 to 95 mass% of the total composition, more preferably 35 to 90 mass%, and even more preferably 40 to 80 mass%.

[0030] The oil-in-water emulsion composition of the present invention may further contain (F) a hydrocarbon that is solid at 25°C, which can improve the spreadability upon application without reducing gloss, reduce stickiness on the skin after application, improve the ease of application over a wide area, and improve the moisturizing effect on the skin after application. Component (F) is preferably a hydrocarbon having a melting point of 25°C or higher, such as petrolatum, paraffin wax, microcrystalline wax, ceresin, and paraffin in the Japanese Pharmacopoeia, and preferably contains one or more selected from petrolatum, paraffin wax, and microcrystalline wax, more preferably contains one or more selected from petrolatum and microcrystalline wax, and even more preferably contains petrolatum.

[0031] Component (F) may be used alone or in combination with other types, and from the viewpoints of improving spreadability upon application, reducing stickiness on the skin after application, improving ease of application over a wide area, and improving the moisturizing effect on the skin after application, the content is preferably 0.1 to 10 mass % of the total composition, more preferably 0.5 to 5 mass %, and even more preferably 1 to 3 mass %.

[0032] The oil-in-water emulsion composition of the present invention may further contain a nonionic surfactant, which can improve the stability. The nonionic surfactant preferably has an HLB of 9 to 18, more preferably an HLB of 11 to 16, and even more preferably an HLB of 12 to 15, from the viewpoints of improving the skin luster after application, improving the skin moisturizing effect, and improving storage stability. Here, HLB (Hydrophilic-Lipophilic Balance) indicates the molecular weight of the hydrophilic group portion in the total molecular weight of the surfactant, and is calculated by Griffin's formula. When a surfactant is composed of two or more nonionic surfactants, the HLB of the mixed surfactant is calculated as follows. The HLB of the mixed surfactant is the phase arithmetic average of the HLB values ​​of each nonionic surfactant based on their blending ratio. Mixed HLB=Σ(HLBx×Wx) / ΣWx HLBx indicates the HLB value of the nonionic surfactant X. Wx represents the mass (g) of the nonionic surfactant X having the value of HLBx.

[0033] Examples of such nonionic surfactants include polyoxyethylene fatty acid esters, sorbitan fatty acid esters such as sorbitan monostearate (HLB: 4.5) and sorbitan isostearate (HLB: 4.7), 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 (40EO) (HLB: 12.5), polyoxyethylene Examples of such surfactants include polyoxyethylene hydrogenated castor oils such as polyoxyethylene hydrogenated castor oil (60 EO) (HLB: 14.0), polyoxyethylene hydrogenated castor oil fatty acid esters, polyoxyethylene phytostanol ether, polyoxyethylene phytosterose ether, polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, and silicone surfactants such as polyether-modified silicones, sucrose fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters, alkyl saccharides, and alkyl glyceryl ethers. Among these, from the viewpoints of improving the skin luster after application, improving the skin moisturizing effect, and improving storage stability, it is preferable to include one or more selected from polyoxyethylene hydrogenated castor oil and sorbitan fatty acid esters.

[0034] The nonionic surfactants can be used alone or in combination of two or more. From the viewpoints of improving the skin luster after application, improving the skin moisturizing effect, and improving storage stability, the content is preferably 0.1 to 5 mass % of the total composition, more preferably 0.3 to 3 mass %, and even more preferably 0.5 to 1 mass %.

[0035] The oil-in-water emulsion composition of the present invention may further contain an anionic surfactant, which can improve the skin luster after application, improve the skin moisturizing effect, and improve storage stability. The anionic surfactants are those used in ordinary emulsion compositions, such as N-acylamino acids such as N-acyl glutamic acids, such as N-lauroyl-L-glutamic acid, N-stearoyl-L-glutamic acid, and N-myristoyl-L-glutamic acid; fatty acids; alkyl ether carboxylic acids; polyoxyethylene alkyl ether carboxylic acids; acyl lactic acid; N-acyl methyl alanine; N-acyl sarcosine; diacyl amino acids and their salts; alkane sulfonic acids; α-olefin sulfonic acids; α-sulfo fatty acid methyl esters; acyl isopropyl alcohols; and the like. Examples of the anionic surfactant include sulfonate type such as N-acylmethyltaurine such as sethionic acid, alkylsulfosuccinic acid, N-myristoyl-N-methyltaurine, N-lauroyl-N-methyltaurine, N-stearoyl-N-methyltaurine, and salts thereof, sulfate type such as alkyl sulfate ester, polyoxyethylene alkyl sulfate ester, alkyl ether sulfate, polyoxyethylene alkyl ether sulfate, fatty acid alkanolamide sulfate ester, and salts thereof, and phosphate type such as alkyl phosphate ester, polyoxyethylene alkyl ether phosphoric acid, and salts thereof. From the viewpoint of forming an α-gel structure and improving storage stability, the anionic surfactant preferably contains one or more selected from N-acylamino acid, N-acylmethyltaurine, and salts thereof, more preferably contains N-acylmethyltaurine and salts thereof, and even more preferably contains N-stearoyl-N-methyltaurine and salts thereof.

[0036] Examples of the salt structure constituting the anionic surfactant include alkali metal salts such as sodium and potassium, basic amino acid salts such as L-arginine, L-histidine, and L-lysine, and alkanolamine salts such as triethanolamine. Alkali metal salts are preferred, and sodium salts are more preferred.

[0037] The anionic surfactants can be used alone or in combination of two or more. From the viewpoints of improving the skin luster after application, improving the skin moisturizing effect, and improving storage stability, the content is preferably 0.1 to 5 mass % of the total composition, more preferably 0.3 to 3 mass %, and even more preferably 0.5 to 1 mass %.

[0038] The oil-in-water emulsion composition of the present invention may further contain a water-soluble thickener, which can improve the luster of the skin after application, improve the stability, and improve the spreadability upon application. Examples of the water-soluble thickener include polyacrylic acid, carboxyvinyl polymers, acrylic acid-based polymers such as alkyl-modified carboxyvinyl polymers, alkyl-modified polysaccharide-based polymers, urethane-based polymers, and the like. From the viewpoints of improving the skin luster after application, improving storage stability, and improving spreadability upon application, it is preferable to contain an acrylic acid-based polymer, more preferably to contain one or more selected from carboxyvinyl polymers and alkyl-modified carboxyvinyl polymers, and even more preferably to contain a carboxyvinyl polymer.

[0039] The water-soluble thickeners can be used alone or in combination of two or more. From the viewpoints of improving the skin luster after application, improving storage stability, and improving spreadability upon application, the content is preferably 0.01 to 3 mass % of the total composition, more preferably 0.1 to 1 mass %, and even more preferably 0.2 to 0.5 mass %.

[0040] The oil-in-water emulsion composition of the present invention may further contain a sterol derivative, which can improve the skin luster after application, improve storage stability, and further improve spreadability upon application. As the sterol derivative, sterol fatty acid esters are preferred, and specific examples thereof include cholesteryl laurate, cholesteryl palmitate, cholesteryl myristate, cholesteryl oleate, cholesteryl stearate, cholesteryl isostearate, cholesteryl linoleate, cholesteryl hydroxystearate, branched fatty acid (C12-31) cholesteryl, macadamiate fatty acid cholesteryl, dihydrocholesteryl oleate, and dihydrocholesteryl macadamiate fatty acid. Phytosteryl, cholesteryl lanolate, phytosteryl butyrate, phytosteryl nonanoate, phytosteryl isostearate, phytosteryl hydroxystearate, phytosteryl caprylate / caprate, phytosteryl ricinoleate, phytosteryl oleate, phytosteryl canola oil fatty acid glycerides, phytosteryl rapeseed oil fatty acid, phytosteryl macadamia nut oil fatty acid, phytosteryl sunflower seed oil fatty acid, phytosteryl rice bran oil fatty acid, and the like. Among these, from the viewpoints of improving the luster of the skin after application, forming an α-gel structure, improving storage stability, and improving spreadability upon application, cholesteryl laurate, cholesteryl palmitate, cholesteryl myristate, cholesteryl oleate, cholesteryl isostearate, and cholesteryl linoleate are preferred, and cholesteryl oleate and cholesteryl isostearate are more preferred.

[0041] The sterol derivatives can be used alone or in combination of two or more. From the viewpoints of improving the skin luster after application, improving storage stability, and improving spreadability upon application, the content is preferably 0.1 to 10 mass% of the total composition, more preferably 1 to 8 mass%, and even more preferably 2 to 4 mass%.

[0042] The oil-in-water emulsion composition of the present invention may contain, in addition to the above-mentioned components, components that are usually used in cosmetics, such as an oil component other than the above-mentioned, a surfactant other than the above-mentioned, a water-soluble polymer other than the above-mentioned, an antioxidant, a fragrance, a preservative, a pH adjuster, a blood circulation promoter, a cooling agent, an antiperspirant, a germicide, a skin activator, a moisturizer, a cooling agent, a colorant, etc.

[0043] The oil-in-water emulsion composition of the present invention can be produced according to a conventional method. For example, components (A), (B), (C), (F) and other oily components are heated and stirred to prepare an oil phase in which they are uniformly dissolved, and then an aqueous phase containing components (D), (E) and other aqueous components heated to 80° C. or higher is added to this oil phase and stirred.Then, the mixture is cooled to obtain an oil-in-water emulsion composition. The oil-in-water emulsion composition of the present invention preferably forms an α-gel (α-type crystal), which can further enhance the moisturizing feeling. The α-gel can be confirmed by structural analysis using X-rays. The α-type structure is a hexagonal crystal system, in which the lipophilic group is oriented perpendicular to the surface of the hydrophilic base layer, and is characterized by the appearance of a sharp diffraction peak at a Bragg angle of about 21 to 23°.

[0044] The oil-in-water emulsion composition of the present invention is suitable as an oil-in-water emulsion cosmetic, and can be applied as makeup cosmetics such as makeup base, foundation, concealer, blusher, eyeshadow, mascara, eyeliner, eyebrow, overcoat agent, lipstick, etc.; UV protection cosmetics such as sunscreen lotion, sunscreen cream, etc.; skin care cosmetics such as skin care lotion, skin care cream, BB cream, serum, etc. Of these, skin care cosmetics are preferred, skin care lotion and skin care cream are more preferred, and skin care cream is even more preferred. The oil-in-water emulsion composition of the present invention spreads well, is not sticky, and is suitable for application over a wide area. In addition, since it can impart a lustrous finish to the skin after application, it is suitable as a body lotion or cream. EXAMPLES

[0045] Examples 1 to 6, Comparative Examples 1 to 2 Oil-in-water emulsion compositions having the compositions shown in Table 1 were prepared and evaluated for shine, spreadability, non-stickiness, and moisturizing feel. The results are also shown in Table 1.

[0046] (Manufacturing method) Components (A), (B), (C), (F) and other oily components excluding silicone oil were heated to 80°C or higher and stirred to prepare a homogeneously dissolved oil phase. To the oil phase, a water-soluble thickener dispersed in silicone oil and an aqueous phase containing components (D), (E) and other aqueous components heated to 80°C or higher were added and stirred. The mixture was then cooled to 25°C to obtain an oil-in-water emulsion composition.

[0047] (Evaluation method) (1) Shine: 2.5μL / cm of each oil-in-water emulsion composition 2 The mixture was applied to the artificial leather with a finger for 2 minutes and then dried at room temperature for 60 minutes. After drying, the brightness value (maximum reflected light intensity) was measured using the SAMBA HAIR SYSTEM (manufactured by Thales). The measurement was performed three times, and the average value was calculated.

[0048] (2) Stretchy: Three expert panelists took about 0.2 g of each oil-in-water emulsion composition on the back of the hand and rubbed it with their fingers to evaluate its spreadability (non-sticky and easy to spread feeling) according to the following criteria. The results were shown as the total score of the three panelists. 5: Very stretchy. 4: Good stretchability. 3: Slightly stretchy. 2: The stretch is somewhat poor. 1: Poor stretch.

[0049] (3) Non-stickiness: Three expert panelists applied about 0.2 g of each oil-in-water emulsion composition to the back of the hand, rubbed it in with their fingers, and then evaluated the lack of stickiness of the skin according to the following criteria. The results were shown as the total score of the three panelists. 5: Not noticeably sticky. 4: Non-sticky. 3: Not very sticky. 2: Slightly sticky. 1: Sticky.

[0050] (4) Moisturizing effect: Three expert panelists took about 0.2 g of each oil-in-water emulsion composition on the back of the hand and rubbed it with their fingers to evaluate the moisturizing feeling (skin moist feeling) according to the following criteria. The results were shown as the total score of the three panelists. 5: Very moisturizing. 4: Has a moisturizing feel. 3: Slightly moisturizing. 2: Not very moisturizing. 1: No moisturizing feeling.

[0051] [Table 1]

[0052] *1: N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanamide; sphingolipid E ​​(Kao Corporation), *2: Cetanol; Cetyl Alcohol NX (manufactured by Kokyu Alcohol Kogyo Co., Ltd.), *3: Stearyl alcohol; Stearyl alcohol NX (manufactured by Kokyu Alcohol Kogyo Co., Ltd.), *4: N-Lauroyl-L-glutamic acid di(phytosteryl / octyldodecyl); Eldew PS-203 (Ajinomoto Co., Ltd.), *5: Sorbitol solution; Sorbitol #650 (manufactured by Mitsubishi Corporation Life Sciences), (sorbitol: 70% by mass, water: 30% by mass. The content in Table 1 indicates the amount of sorbitol), *6: Vaseline; Super White Protopet (manufactured by Sonneborn, LLC), *7: Polyoxyethylene hydrogenated castor oil (40EO); Emanone CH-40 (Kao Corporation), *8: Sorbitan monostearate; Rheodol SP-S10V (Kao Corporation), *9: Sodium N-stearoyl-N-methyl taurate; Nikkol SMT (manufactured by Nippon Surfactant Industries Co., Ltd.), *10: Cholesteryl isostearate; Exepar IS-CE-A (Kao Corporation), *11: Olive oil; Cropure OL-LQ (manufactured by Croda Japan), *12: Methylpolysiloxane; Silicone KF-96A-10CS (manufactured by Shin-Etsu Chemical Co., Ltd.), *13: Carboxyvinyl polymer; Carbopol 980 POLYMER (manufactured by Lubrizol Advanced Materials, Inc.)

[0053] Prescription Examples 1-4 The oil-in-water emulsion compositions having the compositions shown in Table 2 were produced in the same manner as in Examples 1 to 6, and had good spreadability, were not sticky, gave the skin a glossy appearance after application, and had excellent moisturizing effects. Table 2 shows the content of each raw material.

[0054] [Table 2]

[0055] *14: Ceramide 2; Ceramide 2 (manufactured by Croda Japan Co., Ltd.), *15: Phytosphingosine; Phytosphingosine (manufactured by Evonik Operations GmbH), *16: Microcrystalline wax; Multiwax W-445 S (manufactured by Sonneborn, LLC), *17: Isotridecyl isononanoate; Salacos 913 (manufactured by Nisshin Oillio Group Co., Ltd.), *18: Neopentyl glycol dicaprate; Estemoll N-01 (manufactured by Nisshin Oillio Group, Ltd.), *19: Glycerin; 86% Glycerin V (Kao Corporation), *20: 1,3-butylene glycol; 1,3-butylene glycol-P (KH Neochem Co., Ltd.), *21: Eucalyptus extract; Eucalyptus extract EBL (manufactured by Tochimoto Tenkaido Co., Ltd.), *22: Asunaro extract; Asunaro Liquid K (manufactured by Ichimaru Pharcos Co., Ltd.), *23: Althea extract; Falcorex Althea K (manufactured by Ichimaru Falcos Co., Ltd.), *24: Roman chamomile extract; Roman chamomile extract BG-60 (manufactured by Koei Kogyo Co., Ltd.), *25: Birch extract; Birch extract (manufactured by Ichimaru Falcos), *26: Ectoin; RONACARE ECTOIN (Merck KGaA), *27: Seaweed extract (1); Falcolex Hibamata EX-E (manufactured by Ichimaru Falcos Co., Ltd.), *28: Rosemary extract; Falcolex Rosemary E (manufactured by Ichimaru Falcos Co., Ltd.), *29: Tuberose polysaccharide; Sofcare TP-S (Kao Corporation), *30: Ethanol; 95% synthetic alcohol (manufactured by Japan Synthetic Alcohol Co., Ltd.), *31: Methyl paraoxybenzoate; Mekxance-M (Ueno Pharmaceutical Co., Ltd.)

Claims

1. The following components (A), (B), (C), (D), and (E): (A) ceramides, (B) a higher alcohol having 12 to 22 carbon atoms, (C) N-acyl amino acid ester, (D) sugar alcohol 1 to 20% by mass, (E) Water An oil-in-water emulsion composition comprising:

2. 2. The oil-in-water emulsion composition according to claim 1, wherein the mass ratio (A) / (C) of component (A) to component (C) is 0.01 to 10.

3. 3. The oil-in-water emulsion composition according to claim 1, wherein the mass ratio (C) / (D) of component (C) to component (D) is 0.05 to 5.

4. 3. The oil-in-water emulsion composition according to claim 1, wherein the viscosity of the following component (C) at 25°C is 100,000 mPa·s or less.

5. 3. The oil-in-water emulsion composition according to claim 1, further comprising (F) a hydrocarbon that is solid at 25°C.