Oil-based emulsions in water

Abstract

The present invention provides an oil-in-water emulsion composition capable of stably retaining retinol derivatives. [Solution] An oil-in-water emulsion composition characterized by containing (A) 0.01 to 4% by mass of a retinol derivative; (B) 0.05 to 3% by mass of a superabsorbent polymer powder having an absorption ratio of 10 times or more its own weight; (C) oil (excluding higher alcohols that are solid at room temperature); (D) water; and (E) a nonionic surfactant. The oil-in-water emulsion composition of the present invention preferably further contains (F) an amphiphilic substance selected from higher alcohols that are solid at room temperature.

Description

Technical Field

[0001] The present invention relates to an oil-in-water emulsion composition. More specifically, it relates to an oil-in-water emulsion composition capable of stably holding a retinol derivative, and a cosmetic comprising the composition.

Background Art

[0002] Retinols (vitamin A such as retinol and retinol derivatives) are known as effective ingredients for the prevention and treatment of skin keratosis and the prevention and recovery of skin aging, and have been conventionally incorporated into cosmetics and topical skin preparations.

[0003] However, retinols are also known to be unstable and are likely to deteriorate under the influence of light, air, heat, metal ions, etc. Retinol fatty acid ester, which is a retinol derivative, is superior in oxidation stability compared to retinol, but since it may undergo hydrolysis, it is necessary to devise a way to ensure stability over time in an oil-in-water emulsion system.

[0004] For example, Patent Document 1 discloses an oil-in-water emulsion composition containing a vitamin A fatty acid ester, an oil-soluble antioxidant, an amphiphilic substance, and a hydrophilic nonionic surfactant. By setting the transition temperature of the gel formed by the amphiphilic substance - hydrophilic nonionic surfactant - water system to 50°C or higher and adjusting the weight ratio of the amphiphilic substance to the hydrophilic nonionic surfactant and the total blending amount of the surfactant within a predetermined range, the stability over time of the vitamin A fatty acid ester is improved.

[0005] Patent Document 2 describes that in an oil-in-water emulsion skin cosmetic forming a gel as in Patent Document 1, by specifying the blending amount of a higher alcohol having 14 to 24 carbon atoms and combining and blending three specific nonionic surfactants, in addition to stabilizing vitamin A, the usability is improved.

[0006] Patent Document 3 discloses an oil-in-water type topical skin composition in which oily particles with an average particle size of 10 to 1000 μm are surrounded by a shell containing an amphiphilic substance with a melting point of 45 to 75°C that contains batyl alcohol and / or glyceryl stearate, thereby preventing the vitamin A fatty acid ester encapsulated in the oily particles from coming into contact with water and improving the stability of the vitamin A fatty acid ester.

[0007] While the technologies described in Patent Documents 1-3 improve the stability of retinol (vitamin A) derivatives, they were sometimes insufficient to prevent deterioration of retinol derivatives in high-temperature environments. Furthermore, the conventional technologies in Patent Documents 1-3 required strict adjustment of the types and amounts of amphiphilic substances and nonionic surfactants, limiting the range of formulations. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 11-228377 [Patent Document 2] Patent No. 4406035 [Patent Document 3] Patent No. 4330511 [Disclosure of the Invention] [Problems that the invention aims to solve]

[0009] The present invention aims to provide an oil-in-water emulsion composition that further improves the stability retention effect of retinol derivatives compared to conventional technologies and is applicable to various formulations. [Means for solving the problem]

[0010] As a result of diligent research to solve the aforementioned problems, the inventors have discovered that by incorporating a superabsorbent polymer powder into an oil-in-water emulsion composition containing a retinol derivative, the stability retention effect of the retinol derivative can be further improved, thus completing the present invention.

[0011] In other words, the present invention is (A) 0.01 to 4% by mass of a retinol derivative; (B) Superabsorbent polymer powder having an absorption ratio of 0.05 to 3% by mass of 10 times or more its own weight; (C) Oils (excluding higher alcohols that are solid at room temperature); (D) Water; and, (E) To provide an oil-in-water emulsion composition characterized by containing a nonionic surfactant. [Effects of the Invention]

[0012] The oil-in-water emulsion composition of the present invention can suppress the degradation of retinol derivatives even under harsh conditions such as high temperatures. Furthermore, since the above effect is obtained by incorporating a superabsorbent polymer powder, it can be applied to a wide range of formulations. [Modes for carrying out the invention]

[0013] The oil-in-water emulsion composition of the present invention (hereinafter also simply referred to as "the composition") contains (A) a retinol derivative, (B) a superabsorbent polymer powder having a water absorption ratio of 10 times or more its own weight, (C) an oil, (D) water, and (E) a nonionic surfactant as essential components.

[0014] (A) Retinol derivatives The retinol derivatives in the present invention (also referred to as "component (A)") include fatty acid esters of retinol (vitamin A), retinal (vitamin A aldehyde), retinoic acid (vitamin A acid), and salts thereof. In the present invention, it is preferable to use retinol fatty acid esters and their salts as component (A). Examples of retinol fatty acid esters, though not limited to them, include retinyl acetate, retinyl palmitate, retinyl propionate, and retinyl linoleate. Examples of salts include alkali metal salts (e.g., sodium salts, potassium salts, lithium salts, etc.), alkaline earth metal salts (e.g., calcium salts, magnesium salts, etc.), ammonium salts, and organic amine salts (e.g., monoethanolamine salts, diethanolamine salts, triethanolamine salts, etc.).

[0015] The amount of (A) retinol derivative in the composition of the present invention is 0.01 to 4% by mass, preferably 0.05 to 2% by mass, relative to the total amount of the oil-in-water emulsion composition. If the amount is less than 0.01% by mass, the effect of the retinol derivative cannot be fully exerted, and if it exceeds 4% by mass, it may cause excessive irritation to the skin.

[0016] (B) Superabsorbent polymer powder The superabsorbent polymer powder in this invention (also referred to as "component (B)") is a superabsorbent polymer powder having an absorption ratio of 10 times or more its own weight. In this specification, "water absorption ratio" is a numerical value indicating how many times the weight of water absorbed by the polymer powder corresponds to the weight of the polymer powder itself, when measured using various measurement methods applicable to the superabsorbent polymer powder (e.g., the dry weight method).

[0017] In the present invention, the (B) superabsorbent polymer powder preferably contains a crosslinked acrylic polymer structure and has a spherical, preferably perfectly spherical, shape in a dry state. The particle size of the (B) superabsorbent polymer powder in the oil-in-water emulsion composition is not particularly limited, but usually an average particle size of 1 to 50 μm, preferably 1 to 30 μm, is used. The (B) superabsorbent polymer powder may be blended by mixing one or more types.

[0018] (B) The superabsorbent polymer powder of the present invention means a powder having a water absorption ratio of 10 times or more. The (B) superabsorbent polymer powder used in the present invention preferably has a water absorption ratio of 50 times or more, more preferably 100 times or more. In this specification, a powder having a water absorption ratio of 100 times or more may be referred to as a "superabsorbent polymer powder" and may be described separately from the superabsorbent polymer powder having a water absorption ratio of less than 100 times.

[0019] Specific examples of the (B) superabsorbent polymer powder include, for example, powders composed of salts of crosslinked acrylic acid polymers. In particular, powders composed of polymers called "Acrylates Crosspolymer-2-Na" (INCI name: Sodium Acrylates Crosspolymer-2) in the cosmetic ingredient display name are preferred. Powders composed of Acrylates Crosspolymer-2-Na are commercially available, and ARON NT-Z (manufactured by Toagosei Co., Ltd.) can be exemplified. It is known that this commercial product has a water absorption ratio of about 24 times.

[0020] (B) Among the high water-absorbing polymer powders, those belonging to the superabsorbent polymer powders include powders composed of polymers called "Carbomer Na" (INCI name: Sodium Carbomer) in the cosmetic ingredient display name, powders composed of polymers called "Sodium Acrylate Grafted Starch" (INCI name: Sodium Polyacrylate Starch) in the cosmetic ingredient display name, etc. are preferably cited as examples. As commercial products of "Carbomer Na", AQUPEC MG N40R (manufactured by Sumitomo Seika Co., Ltd.), and as commercial products of "Sodium Acrylate Grafted Starch", MAKIMOUSSE 12 (average particle size of about 12 μm) (manufactured by Daito Kasei Kogyo Co., Ltd.), MAKIMOUSSE 25 (average particle size of about 25 μm) (manufactured by Daito Kasei Kogyo Co., Ltd.), Sunfresh ST-100 (manufactured by Sanyo Kasei Kogyo Co., Ltd.), etc. are known. Also, AQUAKEEP 10SH-NF (manufactured by Sumitomo Seika Co., Ltd.) is a powder composed of the cosmetic ingredient display name "Acrylates Crosspolymer-2-Na", but its water absorption ratio is 200 to 500 times and can be used as a superabsorbent polymer powder. In the composition of the present invention, it is preferable to use a superabsorbent polymer powder composed of Carbomer Na as the (B) high water-absorbing polymer powder.

[0021] The blending amount of the (B) high water-absorbing polymer powder in the composition of the present invention is 0.05 to 3% by mass, preferably 0.1 to 2% by mass, based on the total amount of the composition. When using a superabsorbent polymer powder as the (B) high water-absorbing polymer powder, the blending amount range is preferably 0.2 to 1% by mass, more preferably 0.25 to 0.7% by mass. If the blending amount of the (B) high water-absorbing polymer powder is less than 0.05% by mass, the stabilizing effect of the retinol derivative will be insufficient.

[0022] (C) Oil The composition of the present invention is an oil-in-water type emulsion composition. The oil component (also referred to as "(C) component") constituting the emulsion composition is not particularly limited, and may be a liquid oil component or a solid or semi-solid oil component commonly used in cosmetics, pharmaceuticals, etc. However, the (C) oil component in the present invention does not include higher alcohols that are solid at room temperature.

[0023] Liquid oils (also called "component C1") are oils that are liquid at room temperature (25°C) (including oils with a melting point of less than 2°C). Specific examples include liquid oils such as avocado oil, evening primrose oil, camellia oil, macadamia nut oil, sunflower oil, almond oil, corn oil, olive oil, rapeseed oil, sesame oil, peach kernel oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, henbit oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnamon oil, Japanese tuni oil, jojoba oil, and germ oil; cetyl octanoate, cetyl ethylhexanoate, hexyldecyl dimethyloctanoate, ethyl laurate, hexyl laurate, and myristic acid. Isopropyl acid, 2-hexyldecyl myristate, myristyl myristate, octyldodecyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, butyl stearate, isocetyl stearate, isocetyl isostearate, decyl oleate, dodecyl oleate, oleyl oleate, myristyl lactate, cetyl lactate, diisostearyl malate, cholesteryl 12-hydroxystearylate, Castor oil fatty acid methyl ester, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, 2-ethylhexyl succinate, diisobutyl adipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, diisopropyl sebacate, di-2-ethylhexyl sebacate, cetyl ethylhexanoate, ethylene glycol di-2-ethylhexanoate, neopentyl glycol dicaprate, neopentyl glycol dioctanoate, acetoglyceride, di-2-heptyl Ester oils such as glycerin undecanoate, tricaprylin, glycerin trioctanoate, glycerin tri-2-ethylhexanoate, glycerin trimyristate, glycerin triisopalmitate, glyceride tri-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythrityl tetraoctanoate, pentaerythrityl tetraethylhexanoate, and phytosteryl / octyldodecyl lauroyl glutamate;Examples of silicone oils include hydrocarbon oils such as liquid paraffin, squalane, pristane, polybutene, hydrogenated polybutene, and hydrogenated polydecene; higher alcohols that are liquid at room temperature such as isostearyl alcohol and oleyl alcohol; and various modified polysiloxanes such as linear polysiloxanes like dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane, and diphenylpolysiloxane; cyclic polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane; amino-modified polysiloxanes, polyether-modified polysiloxanes, alkyl-modified polysiloxanes, and fluorine-modified polysiloxanes.

[0024] Solid or semi-solid oils (also called "C2 components") are oils that are solid or paste-like at room temperature (25°C) (including oils with a melting point of 25°C or higher) (however, higher alcohols are not included). Specific examples include solid fats and oils such as cocoa butter, coconut oil, hydrogenated coconut oil, palm oil, hydrogenated palm oil, palm kernel oil, Japanese wax kernel oil, Japanese wax, and hydrogenated castor oil; beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, privet wax, montan wax, rice bran wax, lanolin, kapok wax, lanolin acetate, sugarcane wax, isopropyl lanolin fatty acid, reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, and POE hydrogenated lanolin alcohol ether; hydrocarbon waxes such as polyethylene wax, paraffin wax, ceresin, petrolatum, microcrystalline wax, Lunacera, and ozokerite; and monostearyl glycerin ether (batyl alcohol). Examples include fatty acid glyceryl ethers, fatty acid glycerides, and fatty acid sterol esters such as macadamia nut fatty acid phytosteryls.

[0025] The amount of (C) oil in the composition of the present invention is preferably 8% by mass or more, more preferably 12% by mass or more, and even more preferably 18% by mass or more, based on the total amount of the composition. The amount is not limited to these values, and may be, for example, 10% by mass or more, 16% by mass or more, 20% by mass or more, etc. Increasing the amount of (C) oil tends to improve the stabilizing effect of the retinol derivative. The upper limit of the amount of (C) oil is not particularly limited, but is usually 50% by mass or less, 40% by mass or less, 35% by mass or less, or 30% by mass or less, based on the total amount of the composition.

[0026] In the composition of the present invention, the (C) oil component preferably contains 60% by mass or more of (C1) liquid oil component relative to the total amount of oil component, more preferably 70% by mass or more, and even more preferably 80% by mass or more. Furthermore, the composition of the present invention preferably further contains (C2) solid or semi-solid oil. When (C2) solid or semi-solid oil is included, the amount included is 1% by mass or more, preferably 2% by mass or more, 20% by mass or less, preferably 18% by mass or less, and more preferably 15% by mass or less, relative to the total amount of oil.

[0027] (D)Water The amount of water (also referred to as "component (D)") in the composition of the present invention is 80% by mass or less, preferably 70% by mass or less, and more preferably 60% by mass or less, based on the total amount of the composition. In the composition of the present invention, reducing the amount of water (D) tends to improve the stabilizing effect of the retinol derivative.

[0028] (E) Nonionic surfactants The oil-in-water emulsion composition of the present invention contains a nonionic surfactant (also referred to as "component (E)"). In the present invention, (E) nonionic surfactants can be either "hydrophilic nonionic surfactants" with an HLB value of 12 or higher, or "lipophilic nonionic surfactants" with an HLB value of less than 12. The HLB value (Hydrophile-Lipophile Balance) of each substance can be determined according to the Kawakami method or the Griffin method. In the Kawakami method, the HLB value is calculated based on the following formula. HLB = 7 + 11.7 log (Mw / Mo) (Here, Mw is the molecular weight of the hydrophilic group, and Mo is the molecular weight of the lipophilic group.)

[0029] Examples of hydrophilic nonionic surfactants include polyoxyethylene (hereinafter abbreviated as "POE") alkyl ethers (POE behenyl ether, POE oleyl ether, POE stearyl ether, POE 2-octyldodecyl ether, POE 2-hexyldecyl ether, POE 2-heptylundecyl ether, POE 2-decyltetradecyl ether, POE 2-decylpentadecyl ether, POE cholestanol ether, etc.); POE glycerin fatty acid esters (POE glyceryl stearate, POE glyceryl isostearate, etc.); POE sorbitan fatty acid esters (POE sorbitan monooleate, etc.); and POE hydrogenated castor oils. More specifically, examples include POE(20) behenyl ether (beheneth-20), PEG-100 stearate, PEG-60 glyceryl isostearate, and PEG-60 hydrogenated castor oil.

[0030] Examples of lipophilic nonionic surfactants include fatty acid glycerol esters and POE glycerol fatty acid esters. More specifically, examples include glyceryl stearate (HLB=5-6), self-emulsifying glyceryl stearate (HLB=5-8), glyceryl isostearate (HLB=6), and PEG-5 glyceryl stearate (HLB=9).

[0031] The amount of (E) nonionic surfactant in the composition of the present invention is 0.1% by mass or more, 0.2% by mass or more, 0.3% by mass or more, 0.4% by mass or more, or 0.5% by mass or more, relative to the total amount of the composition, and can be 5% by mass or less, 4% by mass or less, 3% by mass or less, 2% by mass or less, or 1% by mass or less. In other words, it is preferable to blend it in an amount that is above any of the lower limits and below any of the upper limits.

[0032] In the present invention, (E) nonionic surfactant may be a single type or a combination of two or more types, but it is preferable to include at least one hydrophilic nonionic surfactant. Furthermore, it is preferable to use a lipophilic nonionic surfactant with an HLB value of 5 or higher, for example, it is preferable not to include sorbitan tristearate, which has an HLB value of 3 or less, or to keep its amount in the mixture less than 0.1 by mass ratio to the total amount of (E) nonionic surfactant.

[0033] The composition of the present invention preferably further contains (F) an amphiphilic substance (also referred to as "component (F)"). The amphiphilic substance (F) is preferably selected to be capable of forming an α-gel in the aqueous phase together with the (E) nonionic surfactant. An α-gel is considered to be a uniform gel state in which a layered structure (α-type hydrated crystal) formed from a bilayer film of a surfactant and an amphiphilic substance forms a network in a water-soluble state. Forming an α-gel further improves the emulsification stability of the composition.

[0034] The amphiphilic substance (F) used in this invention is a higher alcohol that is solid at room temperature (25°C). The higher alcohol that is solid at room temperature is preferably selected from monohydric alcohols having an alkyl group with 16 to 22 carbon atoms, particularly saturated aliphatic alcohols. Specific examples include behenyl alcohol, stearyl alcohol, and cetyl alcohol (cetanol).

[0035] The amount of (F) amphiphilic substance in the composition of the present invention is 1% by mass or more, 2% by mass or more, or 3% by mass or more, and can be 10% by mass or less, 8% by mass or less, or 6% by mass or less, based on the total amount of the composition. That is, it is preferable to include it in an amount that is above one of the lower limits and below one of the upper limits. Furthermore, the ratio (mass ratio) of the amount of (E) nonionic surfactant to the amount of (F) amphiphilic substance is preferably adjusted to a range of 10:1 to 1:10, more preferably 7:1 to 1:7.

[0036] The composition of the present invention may contain, in addition to the above components (A) to (F), other components that can be incorporated into cosmetics and quasi-drugs. Examples of other components, but not limited to, include thickeners, humectants, various drugs, antioxidants, chelating agents, pH adjusters, UV absorbers, and powder components.

[0037] Examples of thickening agents include aqueous thickeners such as acrylic acid-based water-soluble polymers and water-soluble polysaccharides. However, those with a water absorption ratio of 10 times or more are not included. Examples of acrylic acid-based water-soluble polymers include copolymers of sodium acrylate and acryloyldimethyltaurate, and copolymers of dimethylacrylamide and acryloyldimethyltaurate. Specifically, examples include (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, and (acrylates / alkyl(C10-30) acrylate) crosspolymer. Examples of water-soluble polysaccharides include xanthan gum and hydroxyethylcellulose.

[0038] Examples of humectants include polyethylene glycol, propylene glycol, dipropylene glycol (DPG), 1,3-butylene glycol (BG), hexylene glycol, glycerin, diglycerin, xylitol, maltitol, maltose, D-mannitol, corn syrup, glucose, fructose, lactose, sodium chondroitin sulfate, sodium hyaluronate, sodium adenosine phosphate, sodium lactate, pyrrolidone carboxylic acid, glucosamine, and cyclodextrin.

[0039] Examples of various drugs include (A) vitamins other than retinol derivatives, whitening agents such as 4-methoxysalicylate and arbutin, amino acids, anti-inflammatory agents, and astringents. Examples of antioxidants include oil-soluble antioxidants such as butylhydroxytoluene (BHT), butylhydroxyanisole (BHA), α-tocopherol, β-tocopherol, γ-tocopherol, and δ-tocopherol, and water-soluble antioxidants such as sodium pyrosulfite.

[0040] The composition of the present invention can be manufactured according to methods commonly used for oil-in-water emulsion cosmetics. For example, it can be manufactured by mixing and stirring aqueous components, separately mixing and stirring oily components while optionally heating them, and emulsifying while adding the oily components to the aqueous components.

[0041] The composition of the present invention, by having the above configuration, not only exhibits excellent emulsification stability but can also stably retain the retinol derivative even under relatively harsh conditions. Therefore, the composition of the present invention is suitable for use as a topical skin preparation or skin cosmetic having efficacy based on a retinol derivative. The form in which it is provided as a cosmetic is not limited, but it can be a liquid such as a liquid foundation, or a cream such as a skin cream, body cream, or face cream. [Examples]

[0042] The present invention will be described in more detail below with specific examples, but the present invention is not limited to the following examples. In addition, unless otherwise specified, the amounts of each ingredient in the following examples are expressed as mass % of the total amount of the composition.

[0043] Oil-in-water emulsion compositions were prepared according to the formulations described in Tables 1 to 3 below. The stability of the retinol derivative in each example composition was evaluated by the following method. The composition of each example was placed in a container, shielded from light with aluminum foil, and stored at 60°C for two weeks. The remaining amount of retinol derivative (retinyl acetate) was then measured by high-performance liquid chromatography. The ratio of the amount of retinol derivative after storage to the amount before storage (remaining rate) in each example composition was calculated using the following formula. Remaining percentage (%) = [(Amount after storage) / (Amount of ingredients before storage)] × 100 The calculated survival rates are listed in Tables 1 to 3.

[0044] Measurements by high-performance liquid chromatography were performed under the following conditions. Column: C18 column (manufactured by Shiseido Co., Ltd.) Detection: UV310nm Mobile phase: 72% methanol / 10% acetonitrile / 18% deionized water / 0.5% acetic acid

[0045] [Table 1]

[0046] As shown in Table 1, Comparative Example 1-1, which did not contain (B) carbomer sodium (a superabsorbent polymer powder), had a remaining percentage of (A) retinol acetate of 76% after storage at 60°C for two weeks, whereas Examples 1-1 to 1-4, which contained (B) superabsorbent polymer powder, had a remaining percentage of 80% or more even after storage at 60°C for two weeks. In other words, by adding (B) superabsorbent polymer powder, more than 80% of (A) retinol acetate was stably retained even when stored under high-temperature conditions.

[0047] [Table 2]

[0048] [Table 3]

[0049] The compositions listed in Table 1 contain 22.5% by mass of (C1) liquid oil and 3.0% by mass of (C2) solid or semi-solid oil, whereas the compositions listed in Tables 2 and 3 contain only (C1) liquid oil, with amounts of 10.0% by mass (Table 2) and 16.0% by mass (Table 3). In the compositions of Tables 2 and 3, when (B) superabsorbent polymer powder was not included (Comparative Examples 2-1 and 3-1), the remaining amount of (A) retinol acetate decreased to approximately 50% after storage at 60°C for two weeks. However, it was confirmed that the remaining amount of (A) retinol acetate was significantly improved by including (B) superabsorbent polymer powder. Furthermore, comparing the data in Tables 1 to 3, a tendency was observed for the remaining amount of (A) retinol acetate to increase as the amount of (C) oil increased.

Claims

1. (A) 0.01 to 4% by mass of a retinol derivative; (B) Superabsorbent polymer powder having an absorption ratio of 0.05 to 3% by mass of 10 times or more its own weight; (C) Oils (excluding higher alcohols that are solid at room temperature); (D) Water; and (E) Nonionic surfactant, An oil-in-water emulsion composition characterized by containing the following:

2. (F) The composition according to claim 1, further comprising an amphiphilic substance selected from higher alcohols that are solid at room temperature.

3. (A) The composition according to claim 1 or 2, wherein the retinol derivative is a retinol fatty acid ester.

4. (B) The composition according to claim 1 or 2, wherein the superabsorbent polymer powder is composed of carbomer sodium.

5. (E) The composition according to claim 1 or 2, wherein the nonionic surfactant comprises a hydrophilic nonionic surfactant with an HLB value of 12 or higher.

6. A topical skin preparation comprising the composition described in claim 1 or 2.

7. A skin cosmetic comprising the composition according to claim 1 or 2.

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