Emulsion composition

Abstract

To provide an emulsion composition which reduces a filmy feeling of the skin after application, has a refreshing feeling of use and delivers a long-lasting moisturizing effect.SOLUTION: There is provided an emulsion composition which comprises the following components (A), (B) and (C): (A) 0.001 to 10 mass% of ceramides, (B) 0.001 to 10 mass% of a compound represented by the general formula (1) (Z1 is glycerin, sorbitan, sorbitol or a sucrose residue, Y1 is an ester linkage group or an ether linkage group, R is a hydrocarbon group having 14 to 22 carbon atoms, and m is a number of 1 to 4) and (C) 0.1 to 25 mass% of an alkylene oxide derivative represented by the general formula (2) (n is an integer of 1 to 10, Z2 is a hydrogen atom or a group obtained by removing n hydroxy groups from a hydroxy compound having 1 to 30 carbon atoms).SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an emulsion composition. [Background technology]

[0002] The stratum corneum, the outermost layer of the skin, contains keratinocytes and intercellular lipids that fill the gaps between them. Most of these have an α-gel structure, which prevents the penetration of external substances into the skin and the evaporation of water from the inside, while also retaining moisture itself, thereby maintaining the skin's flexibility and smooth appearance. It is generally known that a decrease in intercellular lipids, especially ceramides, causes undesirable skin conditions, and it is believed that topical ceramide supplementation can improve the deterioration of skin function. For this reason, compositions containing ceramides to enhance the moisturizing effect of the skin have been investigated.

[0003] For example, Patent Document 1 describes that an emulsion composition containing sphingosines, ceramides, glycerin fatty acid esters, higher alcohols, and water has excellent storage stability and a high moisturizing effect. Patent Document 2 describes that an aqueous cosmetic preparation containing ceramides, an oily component, a hydrophilic surfactant, and a water-soluble amphiphilic component has excellent moisturizing properties, transparency, and stability over time. Patent Document 3 describes that an emulsion composition containing monobehenic acid or monocetyl glyceryl ether, a higher alcohol, ceramides, an anionic surfactant, and a water-soluble polymer forms a coating film that is flexible and elastic and has high moisture retention. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-22997 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-166709 [Patent Document 3] Japanese Patent Application Laid-Open No. 2012-214469 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventional emulsion compositions containing ceramides have excellent moisturizing properties and moisture retention, but have problems with the feel when used, such as a strong film-like feeling and stickiness. In particular, the filmy feeling refers to the feeling that the skin is covered with solid fats such as ceramides after applying a composition containing solid fats such as ceramides to the skin, and it is thought that this filmy feeling allows the skin to feel a sustained moisturizing effect after application. However, when rubbing skin with a filmy feeling with a finger, the finger does not move smoothly and feels like it is catching on the skin, causing an uncomfortable feeling on the skin. Therefore, in compositions containing solid fats such as ceramides, reducing the filmy feeling has been an issue. Furthermore, since a reduced filmy feeling makes it difficult to achieve a sustained moisturizing effect, achieving both a reduced filmy feeling and a sustained moisturizing effect has also been an issue. [Means for solving the problem]

[0006] The present inventors have found that by using a combination of ceramides with a specific compound such as batyl alcohol and an alkylene oxide derivative, it is possible to obtain an emulsion composition that reduces the filmy feeling on the skin after application, provides a non-sticky, fresh and moisturizing feel in use, and has a sustained moisturizing effect despite the reduced filmy feeling.

[0007] The present invention comprises the following components (A), (B) and (C): (A) 0.001 to 10% by mass of ceramides, (B) General formula (1);

[0008] [ka]

[0009] (In the formula, Z 1 represents a glycerin, sorbitan, sorbitol, or sucrose residue having two or more hydroxyl groups, and Y1 represents an ester bonded group or an ether bonded group, R represents a hydrocarbon group having 14 to 22 carbon atoms, and m represents a number from 1 to 4. 0.001 to 10 mass% of a compound represented by the formula: (C) General formula (2);

[0010] [ka]

[0011] (wherein n represents an integer of 1 to 10, and Z 2 represents a hydrogen atom or a group obtained by removing n hydroxy groups from a hydroxy compound having 1 to 30 carbon atoms, EO represents an ethylene oxide group, PO represents a propylene oxide group, AO represents an alkylene oxide group having 2 to 5 carbon atoms, and a, b, and c represent the average number of moles added of each alkylene oxide group and are independently 0 to 200. However, a, b, and c cannot all be 0. Z 2 When is a hydrogen atom, n is 1. In addition, within the brackets [ ], the alkylene oxide groups may be added randomly or in blocks. 0.1 to 25 mass% of an alkylene oxide derivative represented by the formula: The present invention relates to an emulsion composition containing the above. [Effects of the Invention]

[0012] The emulsion composition of the present invention reduces the filmy feeling on the skin after application, provides a non-sticky, fresh and refreshing feel in use, and provides a sustained moisturizing effect despite the reduced filmy feeling. The filmy feeling refers to the feeling that when rubbing the skin with fingers, the fingers do not move smoothly and feel as if they are catching on the skin, giving an uncomfortable feeling to the skin. DETAILED DESCRIPTION OF THE INVENTION

[0013] The ceramides of component (A) used in the present invention may be either natural ceramides or pseudo-ceramides, and preferably include one or more types selected from those represented by the following general formula (3) or (4): (I) The natural ceramide represented by the general formula (3) may be a naturally occurring ceramide or a synthetic product having the same structure.

[0014] [ka]

[0015] (In the formula, R 1 represents a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 7 to 19 carbon atoms which may be substituted with a hydroxyl group; Z 3 represents a methylene group or a methine group; X 1 , X 2 , and X 3 each independently represents a hydrogen atom, a hydroxyl group, or an acetoxy group; X 4 represents a hydrogen atom or forms an oxo group together with the adjacent oxygen atom (provided that Z 3 When is a methine group, X 1 and X 2 One of the X's is a hydrogen atom, and the other is absent. 4 When forms an oxo group, X 3 does not exist. );R 2 represents a hydroxymethyl group or an acetoxymethyl group; R 3 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; R 4 indicates a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 5 to 30 carbon atoms which may be substituted with a hydroxyl group, or a linear or branched, saturated or unsaturated fatty acid having 8 to 22 carbon atoms which may be substituted with a hydroxyl group which is ester-bonded to the ω-terminus of the alkyl group; the dashed line indicates that the bond may be unsaturated.

[0016] Preferably, R 1 is a linear alkyl group having 7 to 19 carbon atoms, more preferably 13 to 15 carbon atoms; R 4is a linear alkyl group having 9 to 27 carbon atoms which may be substituted with a hydroxyl group, or a linear alkyl group having 9 to 27 carbon atoms to which linoleic acid is ester-bonded. 4 preferably represents a hydrogen atom or forms an oxo group together with an oxygen atom. 4 Preferred examples of the alkyl group include tricosyl, 1-hydroxypentadecyl, 1-hydroxytricosyl, heptadecyl, 1-hydroxyundecyl, and nonacosyl groups in which linoleic acid is ester-bonded at the ω-position.

[0017] The natural ceramide is preferably one or more selected from ceramide Types 1 to 7 in which sphingosine, dihydrosphingosine, phytosphingosine, or sphingadienine is amidated (e.g., porcine and human ceramides described in Figure 2 of J. Lipid Res., 24:759 (1983) and Figure 4 of J. Lipid. Res., 35:2069 (1994)).

[0018] Furthermore, N-alkyl forms (for example, N-methyl forms) of these are also included. These ceramides may be used in the form of an optically active natural form (D(-) form), an optically active non-natural form (L(+) form), or a mixture of the natural and non-natural forms. The relative configuration of the above compounds may be that of the natural form, or may be any other non-natural form, or may be a mixture of these. Among these, one or more compounds selected from the group consisting of CERAMIDE 1, CERAMIDE 2, CERAMIDE 3, CERAMIDE 5, and CERAMIDE 6II (all listed in INCI, 8th Edition) and compounds represented by the following formula are preferred, with CERAMIDE 2 being more preferred.

[0019] [ka]

[0020] These may be either natural extracts or synthetic substances, and commercially available products can be used. When using commercially available natural ceramides, it is preferable to use one or more selected from Ceramide I, Ceramide III, Ceramide IIIA, Ceramide IIIB, Ceramide IIIC, Ceramide VI (all from Cosmopharm), Ceramide TIC-001 (Takasago International), CERAMIDE II (Quest International), DS-Ceramide VI, DS-CLA-Phytoceramide, C6-Phytoceramide, DS-ceramide Y3S (DOOSAN), and CERAMIDE2 (Sederma).

[0021] [ka]

[0022] (II) Pseudo-ceramide represented by general formula (4):

[0023] [ka]

[0024] (In the formula, R 5 represents a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 10 to 22 carbon atoms which may be substituted with a hydroxyl group, or a hydrogen atom; X 5 represents a hydrogen atom, an acetyl group, or a glyceryl group; R 6 represents a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 5 to 22 carbon atoms which may be substituted with a hydroxyl group or an amino group, or a hydrocarbon group having a linear or branched, saturated or unsaturated fatty acid having 8 to 22 carbon atoms which may be substituted with a hydroxyl group ester-bonded to the ω-terminus of the hydrocarbon group; R 7 represents a hydrogen atom or an alkyl group having a total of 1 to 30 carbon atoms which may be substituted with a hydroxyl group, a hydroxyalkoxy group, an alkoxy group, or an acetoxy group.

[0025] R 6Particularly preferred are nonyl, tridecyl, pentadecyl, an undecyl group having linoleic acid ester-bonded at the ω-position, a pentadecyl group having linoleic acid ester-bonded at the ω-position, a pentadecyl group having 12-hydroxystearic acid ester-bonded at the ω-position, and an undecyl group having methyl-branched isostearic acid amide-bonded at the ω-position.

[0026] R 7 is R 5 When R is a hydrogen atom, it is an alkyl group having a total of 10 to 30 carbon atoms, preferably 12 to 20 carbon atoms, which may be substituted with a hydroxyl group, a hydroxyalkoxy group, an alkoxy group, or an acetoxy group, and R 5 When R is a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 10 to 22 carbon atoms which may be substituted with a hydroxyl group, it is preferable that R represents a hydrogen atom or an alkyl group having a total of 1 to 8 carbon atoms which may be substituted with a hydroxyl group, a hydroxyalkoxy group, an alkoxy group or an acetoxy group. 7 The hydroxyalkoxy group or alkoxy group preferably has 1 to 7 carbon atoms.

[0027] [ka]

[0028] As the general formula (4), R 5 is a hexadecyl group, X 5 is a hydrogen atom, R 6 is a pentadecyl group, R 7 is a hydroxyethyl group; R 5 is a hexadecyl group, X 5 is a hydrogen atom, R 6 is a nonyl group, R 7 is preferably one or more pseudo-type ceramides having a hydroxyethyl group, and R 5 is a hexadecyl group, X 5 is a hydrogen atom, R 6 is a pentadecyl group, R 7More preferred is one in which the alkyl group is a hydroxyethyl group (N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanamide).

[0029] [ka]

[0030] From the viewpoint of improving the durability of the moisturizing effect, the component (A) is preferably one or more selected from (N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanamide) and ceramide 2.

[0031] Component (A) can be used alone or in combination with two or more types, and the content is 0.001 to 10 mass % of the total composition, preferably 0.01 to 8 mass %, more preferably 0.1 to 6 mass %, and even more preferably 1.5 to 4 mass %, from the viewpoints of reducing the filmy feeling on the skin after application and improving the refreshing feeling and sustained moisturizing effect.

[0032] The component (B) used in the present invention is represented by the general formula (1) above. In the formula, the hydrocarbon group having 14 to 22 carbon atoms represented by R is preferably a straight-chain hydrocarbon group, and examples thereof include straight-chain alkyl groups such as myristyl, palmityl, stearyl, and behenyl; palmitoyl, and oleyl groups. Also, Z 1 As the active ingredient, glycerin is preferred from the viewpoint of reducing the filmy feeling on the skin after application and improving the refreshing feeling. Examples of compounds represented by general formula (1) include glycerin mono-fatty acid esters, sorbitan mono-fatty acid esters, sorbitan di-fatty acid esters, sorbitol mono-fatty acid esters, sorbitol di-fatty acid esters, sucrose mono-fatty acid esters, glycerin mono-alkyl ethers, etc. Examples of glycerin mono-fatty acid esters include glyceryl stearate and glyceryl behenate, and examples of glycerin mono-alkyl ethers include glycerin mono-cetyl ether (chimyl alcohol), glycerin mono-stearyl ether (batyl alcohol), and isostearyl glyceryl ether.

[0033] From the viewpoint of reducing the filmy feeling on the skin after application and improving the refreshing feeling, component (B) is preferably one or more selected from glycerin monofatty acid esters and glycerin monoalkyl ethers, more preferably one or more selected from glyceryl stearate, glyceryl behenate, glycerin monocetyl ether (chimyl alcohol), glycerin monostearyl ether (batyl alcohol), and isostearyl glyceryl ether, even more preferably one or more selected from glyceryl stearate, glyceryl behenate, and glycerin monostearyl ether (batyl alcohol), and even more preferably glycerin monostearyl ether (batyl alcohol).

[0034] One or more types of component (B) can be used, and the content is 0.001 to 10 mass % of the total composition, preferably 0.01 to 8 mass %, more preferably 0.1 to 5 mass %, and even more preferably 0.9 to 2.5 mass %, from the viewpoint of reducing the filmy feeling on the skin after application and improving the refreshing feeling.

[0035] In the present invention, the mass ratio (A) / (B) of component (A) to component (B) is preferably 0.05 to 20, more preferably 0.1 to 10, even more preferably 0.45 to 5.8, and even more preferably 1.2 to 2.5, from the viewpoints of reducing the filmy feeling on the skin after application and improving the refreshing feeling and sustained moisturizing effect.

[0036] The alkylene oxide derivative of component (C) is represented by the above general formula (2). In the formula, n represents an integer of 1 to 10; Z 2 represents a hydrogen atom or a group obtained by removing n hydroxy groups from a hydroxy compound having 1 to 30 carbon atoms; EO represents an ethylene oxide group; PO represents a propylene oxide group; AO represents an alkylene oxide group having 2 to 5 carbon atoms; and a, b, and c represent the average number of moles added of each alkylene oxide group, each independently being 0 to 200. However, all of a, b, and c cannot be 0. Furthermore, Z 2 When is a hydrogen atom, n is 1. In the brackets [ ] of formula (2), the alkylene oxide groups may be added randomly or in blocks. Also, if a, b, and c are each non-zero, From the viewpoint of reducing the filmy feeling on the skin after application and improving the refreshing feeling, a is preferably 0.5 to 200, more preferably 1 to 170, even more preferably 1.5 to 100, and even more preferably 2 to 50. From the viewpoint of reducing the filmy feeling on the skin after application and improving the refreshing feeling, b is preferably 0.1 to 200, more preferably 0.5 to 170, even more preferably 0.8 to 100, and even more preferably 1 to 50. From the viewpoint of reducing the filmy feeling on the skin after application and improving the refreshing feeling, c is preferably 0.1 to 200, more preferably 0.3 to 100, even more preferably 0.5 to 50, and even more preferably 0.8 to 10. Regardless of the values ​​of a and c, b is preferably 0.1 or more from the viewpoint of reducing the filmy feeling on the skin after application and improving the refreshing feeling.

[0037] Furthermore, in order to reduce the filmy feeling on the skin after application and improve the refreshing feeling and sustained moisturizing effect, Z 2is preferably a hydrogen atom or a group obtained by removing n hydroxy groups from an alkyl monoalcohol having 4 to 24 carbon atoms, glycerin, an alkyl glycoside, diglycerin, or sorbitol, i.e., a group derived from these alcohol compounds, more preferably a hydrogen atom or a group derived from an alkyl monoalcohol having 4 to 24 carbon atoms, glycerin, or an alkyl glycoside, even more preferably a hydrogen atom or a group derived from an alkyl monoalcohol having 2 to 6 carbon atoms, glycerin, or methyl glucoside, and even more preferably glycerin.

[0038] More specifically, component (C) is: Z 2 is a group derived from glycerin, Examples include polyoxybutylene polyoxyethylene polyoxypropylene glyceryl ether (3B.O.) (8E.O.) (5P.O.) (cosmetic labeling name: PEG / PPG / Polybutylene Glycol-8 / 5 / 3 Glycerin), polyoxypropylene glyceryl ether (cosmetic labeling name: PPG-16 glyceryl ether), etc.; Z 2 is a group derived from methyl glucoside, Examples include polyoxypropylene methylglucosides (cosmetics labeling names: PPG-10 methylglucose, PPG-20 methylglucose); Z 2 is a group derived from an alkyl monoalcohol having 4 carbon atoms, such as Examples include polyoxyethylene polyoxypropylene butyl ether (cosmetic labeling names: PPG-10 buteth-9, PPG-17 buteth-17); Z 2 is a group derived from sorbitol, Examples include polyoxypropylene sorbitol (cosmetic labeling names: PPG-25 sorbitol, PPG-10 sorbitol); Z 2 is a hydrogen atom, Polypropylene glycol (cosmetic labeling name: PPG-7, PPG-34), Examples include polyoxyethylene polypropylene glycol (cosmetic labeling names: PEG / PPG-150 / 35 copolymer, PEG / PPG-160 / 30 copolymer); Z 2 is a group derived from diglycerin, Examples include polyoxypropylene diglyceryl ether (cosmetics labeling name: PPG-14 polyglyceryl-2 ether, PPG-9 diglyceryl). Among these, one or more selected from PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, PPG-10 methyl glucose, PPG-20 methyl glucose, PPG-7, PPG-10 depth-9, and PPG-17 depth-17 are preferred; More preferably, one or more selected from PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, PPG-10 methyl glucose, PPG-20 methyl glucose, PPG-10 depth-9, and PPG-17 depth-17; More preferably, one or more selected from PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, PPG-10 depth-9, and PPG-17 depth-17; Even more preferred is PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin.

[0039] The alkylene oxide derivative of component (C) can be synthesized by a known method. Also, Wilbride S-753 (PEG / PPG / Polybutylene Glycol-8 / 5 / 3 Glycerin), Macbiobride MG-10P (PPG-10 Methylglucose), Macbiobride MG-20P (PPG-20 methyl glucose), Unilube 50MB-11 (PPG-10 buteth-9), Unilube 50MB-26 (PPG-17 buteth-17), Uniol HS-1600D (PPG-25 sorbitol), Pronon #208 (PEG / PPG-150 / 35 copolymer), Uniol D-400 (PPG-7), Uniol D-2000 (PPG-34) (all manufactured by NOF Corporation); SY-DP14T (PPG-14 polyglyceryl-2 ether) Commercially available products such as SY-DP9 (PPG-9 diglyceryl) (all manufactured by Sakamoto Pharmaceutical Co., Ltd.); Newpol GP-1000 (PPG-16 glyceryl ether), Newpol SP-750 (PPG-10 sorbitol), Newpol PE-68 (PEG-160 / 30 copolymer), Newpol PE-78 (PEG-150 / 35 copolymer) (all manufactured by Sanyo Chemical Industries, Ltd.); and Emulgen PP-290 (PEG / PPG-160 / 30 copolymer, manufactured by Kao Corporation) can also be used.

[0040] Component (C) can be used alone or in combination with two or more types, and the content is 0.1 to 25 mass %, preferably 1.7 to 15 mass %, and more preferably 3.8 to 8 mass %, of the total composition from the viewpoint of reducing the filmy feeling on the skin after application and improving the refreshing feeling.

[0041] In the present invention, the mass ratio (B) / (C) of component (B) to component (C) is preferably 0.01 to 5, more preferably 0.07 to 1.2, even more preferably 0.11 to 0.75, and even more preferably 0.23 to 0.45, from the viewpoints of reducing the filmy feeling on the skin after application and improving the refreshing feeling and sustained moisturizing effect.

[0042] In the emulsion composition of the present invention, the content of (D) water is preferably 40 to 97 mass %, more preferably 50 to 96 mass %, and even more preferably 60 to 93 mass %, of the total composition.

[0043] The emulsion composition of the present invention may further contain (E) a higher alcohol having 12 to 22 carbon atoms, which can further enhance the lasting moisturizing effect. Examples of such higher alcohols include myristyl alcohol, cetanol, stearyl alcohol, and behenyl alcohol. The higher alcohol of component (E) preferably has 14 to 18 carbon atoms, more preferably 16 carbon atoms, from the viewpoint of improving the durability of the moisturizing effect.

[0044] Component (E) can be used alone or in combination of two or more. From the viewpoints of reducing the filmy feeling on the skin after application and improving the sustained feeling of the moisturizing effect, the content is preferably 0.001 to 10 mass % of the total composition, more preferably 0.01 to 5 mass %, and even more preferably 0.5 to 4 mass %.

[0045] The emulsion composition of the present invention may further contain (F) a water-soluble thickener, which can improve the glossy feeling of the skin after application. Examples of water-soluble thickeners include alkyl-modified polyacrylic acid polymers, alkyl-modified polysaccharide polymers, and urethane polymers. More specifically, examples of alkyl-modified polyacrylic acid polymers include alkyl acrylate polymers, (acrylic acid / C10-30 alkyl acrylate) copolymers, and (alkyl acrylate / steareth-20 methacrylate) copolymers; examples of alkyl-modified polysaccharide polymers include laureth-13PG hydroxyethyl cellulose and sodium stearoxy PG hydroxyethyl cellulose sulfonate; examples of polyurethane polymers include (PEG-240 / decyltetradeceth-20 / HDI) copolymers. From the viewpoint of improving the glossy feel of the skin after application, component (F) is preferably one or more selected from alkyl-modified polyacrylic acid polymers and alkyl-modified polysaccharide polymers, more preferably alkyl-modified polyacrylic acid polymers, even more preferably one or more selected from (acrylic acid / alkyl acrylate (C10-30)) copolymers and (alkyl acrylate / steareth-20 methacrylate) copolymers, and even more preferably (alkyl acrylate / steareth-20 methacrylate) copolymers.

[0046] Commercially available examples of component (F) include alkyl acrylate polymers such as Accurylin 33 (The Dow Chemical Company), acrylic acid / C10-30 alkyl acrylate copolymers such as Pemulen TR-1, Pemulen TR-2, and Carbopol ETD 2020 (all from Lubrizol Advanced Materials, Inc.), alkyl acrylate / steareth-20 methacrylate copolymers such as Accurylin 22 (The Dow Chemical Company), sodium stearoxy PG hydroxyethyl cellulose sulfonate such as SPS-S-SA, laureth-13 PG hydroxyethyl cellulose such as Sofcare EP-S (all from Kao Corporation), and Natrosol Plus (Hercules-Aqualon). Examples of urethane polymers include ADEKA NOL GT-700 (manufactured by ADEKA Corporation) as a (PEG-240 / decyltetradeceth-20 / HDI) copolymer.

[0047] Component (F) can be used alone or in combination of two or more types, and the content is preferably 0.01 to 3 mass % of the total composition, more preferably 0.2 to 1.5 mass %, and even more preferably 0.4 to 0.8 mass %, from the viewpoints of reducing the filmy feeling on the skin after application and improving the refreshing feeling, sustained moisturizing effect, and glossy feeling on the skin after application.

[0048] In the present invention, the mass ratio (A) / (F) of component (A) to component (F) is preferably 0.01 to 100, more preferably 0.1 to 50, even more preferably 0.5 to 14, and even more preferably 3 to 7, from the viewpoints of reducing the filmy feeling on the skin after application and improving the refreshing feeling, the sustained moisturizing effect, and the glossy feeling on the skin after application.

[0049] In the present invention, the mass ratio (C) / (F) of component (C) to component (F) is preferably 0.1 to 100, more preferably 1 to 70, even more preferably 4 to 42, even more preferably 7 to 29, and particularly preferably 9 to 14, from the viewpoints of reducing the filmy feeling on the skin after application and improving the refreshing feeling, the sustained moisturizing effect, and the glossy feeling on the skin after application.

[0050] The emulsion composition of the present invention can be used as an external preparation for skin such as a cosmetic. When used as a cosmetic, in addition to the above-mentioned components, it may further contain components used in ordinary cosmetic preparations, such as oily components other than those mentioned above, surfactants, lower alcohols, moisturizing agents, antioxidants, preservatives, chelating agents, whitening agents, UV absorbers, vitamins, plant extracts, various other medicinal ingredients, powders, fragrances, coloring materials, etc.

[0051] The emulsion composition of the present invention can be produced by a conventional method, for example, by heating and mixing components (A), (B), (C) and other components, followed by cooling. [Example]

[0052] Examples 1 to 19 and Comparative Examples 1 to 3 Emulsion compositions having the formulations shown in Tables 1 to 4 were prepared and evaluated for the absence of a filmy feeling on the skin after application, the refreshing feeling, and the sustained moisturizing effect. The results are also shown in Tables 1 to 4.

[0053] (Manufacturing method) Components (A), (B), (C) and other components were mixed under heating at 60°C or higher, and after dissolution was confirmed, the mixture was cooled to 25°C to obtain an emulsion composition.

[0054] (Evaluation method) (1) Lack of film-like feeling on the skin after application: Three expert evaluators applied 0.1 g of each emulsion composition to the back of their hands, massaged it, and immediately thereafter touched their skin to perform a sensory evaluation of the absence of a film-like feeling according to the following criteria. The absence of a film-like feeling means that when the skin after application was touched with the fingers, there was no stickiness and the fingers could move smoothly. The evaluation results in the table are shown as the total scores of the three expert evaluators. 5: There is clearly no filmy feeling. 4: No filmy feeling. 3: Not much of a filmy feel. 2: Has a slightly filmy feel. 1: Has a filmy feel.

[0055] (2) Refreshing feeling on the skin after application: Three expert evaluators applied 0.1 g of each emulsion composition to the back of their hands, massaged the skin, and immediately thereafter touched it to evaluate the refreshing feeling using the following criteria. The evaluation results in the table are shown as the total scores of the three expert evaluators. 5: Very refreshing. 4;It has a refreshing feel. 3: Has a slightly refreshing taste. 2: It doesn't feel very refreshing. 1: It doesn't feel refreshing.

[0056] (3) Long-lasting moisturizing effect on skin after application: Three expert evaluators applied 0.1 g of each emulsion composition to the back of their hands, massaged it in, and then touched the skin immediately after and one hour later to perform a sensory evaluation of the lasting moisturizing effect according to the following criteria. The evaluation results in the table are the total scores of the three expert evaluators. 5. The moisturizing effect is very long-lasting. 4: The moisturizing effect lasts. 3: The moisturizing effect lasts for some time. 2: The moisturizing effect does not last very long. 1: The moisturizing effect does not last.

[0057] [Table 1]

[0058] [Table 2]

[0059] [Table 3]

[0060] [Table 4]

[0061] Examples 20 to 30 Emulsion compositions having the formulations shown in Table 5 were prepared in the same manner as in Examples 1 to 19, and the absence of a filmy feeling on the skin after application, the refreshing feeling, the sustained moisturizing feeling, and the glossy feeling were evaluated. The results are also shown in Table 5.

[0062] (Evaluation method) (4) Skin appearance after application: Three expert evaluators applied 0.1 g of each emulsion composition to the back of the hand, massaged it in, and immediately afterward visually inspected the skin to evaluate whether or not it had a glossy feel, according to the following criteria. The evaluation results in the table are shown as the total scores of the three expert evaluators. 5: Very glossy. 4;It has a glossy finish. 3: Slightly glossy. 2: Not very shiny. 1: No shine.

[0063] [Table 5]

[0064] Prescription examples 1-3 In the same manner as in Examples 1 to 19, emulsion compositions having the compositions shown in Tables 6 to 8 were produced. All of the obtained emulsion compositions have a reduced filmy feel on the skin after application, are non-sticky, and have a fresh, refreshing feel when used, and provide a sustained moisturizing effect despite the reduced filmy feel.

[0065] Table 6

[0066] Table 7

[0067] Table 8

Claims

1. The following components (A), (B), (C), and (D): (A) 0.4 to 5% by mass of ceramides, (B) 0.3 to 4.5% by mass of one or more selected from batyl alcohol, isostearyl glyceryl ether, glyceryl stearate, glyceryl behenate, and chimyl alcohol; (C) 1 to 20% by mass of one or more alkylene oxide derivatives selected from polyoxybutylene polyoxyethylene polyoxypropylene glyceryl ether (3B.O.) (8E.O.) (5P.O.), PPG-10 methyl glucose, PPG-20 methyl glucose, PPG-7, PPG-10 buteth-9, PPG-17 buteth-17, and PPG-9 diglyceryl, (D) Water 74.6-93.6% by mass wherein the mass ratio (B) / (C) of component (B) to component (C) is 0.06 to 1.5, and the emulsion composition is an external preparation for skin.

2. 2. The emulsion composition according to claim 1, wherein the mass ratio (A) / (B) of component (A) to component (B) is 0.05 to 20.

3. The emulsion composition according to claim 1 or 2, further comprising (E) a higher alcohol having 12 to 22 carbon atoms.

4. The emulsion composition according to any one of claims 1 to 3, further comprising a water-soluble thickener as component (F).

5. 5. The emulsion composition according to claim 4, wherein the component (F) is one or more polymers selected from the group consisting of alkyl-modified polyacrylic acid polymers and alkyl-modified polysaccharide polymers.

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