Oil-in-water cleansing cosmetics

Abstract

The object of the present invention is to provide an oil-in-water type cleansing cosmetic that maintains a stable emulsified state regardless of the surfactant content and exhibits cleansing power regardless of the presence or absence of cyclic silicones. [Solution] The above objective is achieved by an oil-in-water type cleansing cosmetic comprising the following components (A) to (C): (A) a liquid ester oil having an IOB of 0.15 or more and less than 0.20, (B) a polyglycerin fatty acid ester having a degree of polymerization of 10, and (C) water.

Description

Technical Field

[0001] The present invention relates to an oil-in-water type cleansing cosmetic composition.

Background Art

[0002] Cleansing cosmetic compositions are skin care cosmetic compositions used for the purpose of removing cosmetics and stains on the skin. In cleansing cosmetic compositions, cyclic silicones such as cyclopentasiloxane are often used as functional ingredients that impart detergency (cleansing power) to the cosmetic compositions.

[0003] However, in Europe, due to concerns over ecological impacts in aqueous systems, the use of cyclotetrasiloxane and cyclopentasiloxane has been restricted since January 31, 2020 under the European Chemicals Regulation (REACH: Registration, Evaluation, Authorization and Restriction of Chemicals). In addition, it has been decided that the use of cyclohexasiloxane will also be restricted after June 6, 2026.

[0004] Many cleansing cosmetic compositions are oily cosmetic compositions containing a large amount of oil, also called cleansing oils. Oily cleansing cosmetic compositions have the advantage of being able to easily and quickly remove makeup stains. However, oily cleansing cosmetic compositions tend to leave stickiness on the skin after washing, and further, due to their high lipophilicity, they over-wash away sebum, leading to problems such as deterioration of the skin's moisturizing function. In contrast, oil-in-water (O / W) type cleansing cosmetic compositions, which contain more water than oil, leave less stickiness on the skin after washing and can rather impart moisture to the skin.

[0005] Examples of oil-in-water type cleansing cosmetic compositions that do not contain cyclic silicones include an O / W type emulsion containing 25% by mass isopropyl myristate, 9% by mass PG5 laurate, 4% by mass PG2 caprate, and 50.6% by mass water (for example, Patent Document 1).

Prior Art Documents

[0006] [Patent Document 1] Japanese Patent Publication No. 2014-122197 [Overview of the project] [Problems that the invention aims to solve]

[0007] However, the O / W type emulsion described in Patent Document 1 contains large amounts of surfactants such as PG5 laurate and PG2 caprate. Oil-in-water cleansing cosmetics containing such large amounts of surfactants have problems, similar to oil-based cleansing cosmetics, such as excessively washing away sebum, reducing the skin's moisturizing function, and potentially irritating the skin.

[0008] Furthermore, there are virtually no known oil-in-water cleansing cosmetics that are in a stable emulsified state and contain an amount of oil sufficient to exhibit cleansing power, even without requiring the inclusion of cyclic silicones and large amounts of surfactants—that is, they may or may not contain cyclic silicones and large amounts of surfactants.

[0009] Therefore, the problem that the present invention aims to solve is to provide an oil-in-water type cleansing cosmetic that maintains a stable emulsified state regardless of the surfactant content and exhibits cleansing power regardless of the presence or absence of cyclic silicones. [Means for solving the problem]

[0010] The inventors of the present invention conducted extensive research to solve the above problems and decided to use liquid ester oil instead of cyclic silicone. However, it proved extremely difficult to obtain an oil-in-water cleansing cosmetic that contained an amount of liquid ester oil sufficient to exhibit cleansing power while maintaining a stable emulsified state.

[0011] Furthermore, the inventors also investigated various emulsifiers that promote the emulsification of oil in water, in parallel with the liquid ester oil. However, they found it extremely difficult to find an emulsifier that could stably emulsify liquid ester oil even in small amounts.

[0012] Under these difficult circumstances, the inventors continued to experiment and finally succeeded in obtaining an oil-in-water type cleansing cosmetic by using a liquid ester oil and a polyglycerin fatty acid ester having specific properties and structure.

[0013] Surprisingly, the resulting oil-in-water cleansing cosmetic maintained a stable emulsified state even with a relatively low content of polyglycerin fatty acid esters. Even more surprisingly, the resulting oil-in-water cleansing cosmetic possessed cleansing power equivalent to or better than that of those using cyclic silicone as the cleansing component.

[0014] Based on these findings and successful examples, the inventors have succeeded in creating an oil-in-water cleansing cosmetic that solves the problems of the present invention by exhibiting a stable emulsified state and excellent cleansing power. This invention is the first to be made and completed by the inventors based on successful examples and findings.

[0015] Therefore, as one aspect of the present invention, cosmetic compositions of the following embodiments are provided. [1] The following ingredients (A) to (C) (A) Liquid ester oil with an IOB of 0.15 or more and less than 0.20 (B) Polyglycerin fatty acid esters having a degree of polymerization of 10 (C)Water including, The aforementioned oil-in-water type cleansing cosmetic. [2] The oil-in-water cleansing cosmetic described in item [1], wherein the ratio of the content of component (B) to the content of component (A) ([component (B)] / [component (A)]) is 0.01 to 1. [3] In addition, the following components (D) (D) Acrylic polymer emulsifier The oil-in-water cleansing cosmetic according to item [1], comprising the same. [4] Further comprising the following component (E) (E) Liquid ester oil having an IOB of 0.20 to 0.30 , and the content of the component (A) is greater than the content of the component (E), the oil-in-water cleansing cosmetic according to item [1]. [5] Further comprising the following component (F) (F) Cyclic silicone is substantially free of, the oil-in-water cleansing cosmetic according to any one of items [1] to [4]. Effects of the Invention

[0016] According to the present invention, by being an oil-in-water cleansing cosmetic, it is possible to remove oily dirt such as cosmetics applied to the skin, while imparting a moist and hydrated feeling to the skin. According to the present invention, it is possible to cleanse cosmetics and the like on the skin with a component that replaces cyclic silicone and has a cleansing power equal to or higher than that of cyclic silicone. According to the present invention, in the oil-in-water cleansing cosmetic, it is possible to reduce the amount of surfactant used, suppress skin irritation, and maintain a stable emulsified state.

[0017] Since the oil-in-water cleansing cosmetic of one aspect of the present invention has excellent stability, it can be used and stored for a long period of time. Furthermore, since the oil-in-water cleansing cosmetic of one aspect of the present invention can be produced by a relatively simple process, it can be produced conveniently on an industrial scale. Further, according to the present invention, steps other than the uniform dispersion of the emulsifier can be performed at normal temperature, and the oil-in-water cleansing cosmetic can be produced substantially at normal temperature. Modes for Carrying Out the Invention

[0018] Hereinafter, the details of the present invention will be described, but the present invention may take various aspects as long as the object thereof is achieved.

[0019] Unless otherwise specified, each term in the present specification is used in the meaning commonly employed by those skilled in the cosmetics field, and should not be construed as having an unduly limiting meaning. In addition, since the theories and speculations set forth in the present specification are made based on the findings and experiences of the present inventors up to now, the technical scope of the present invention is not restricted only by such theories and speculations.

[0020] "Content" is synonymous with concentration and added amount (usage amount), and unless otherwise specified, means the ratio of the amount of a component relative to the total amount of the cosmetic. However, the total sum of the contents of each component shall not exceed 100%. In the present specification, unless otherwise specified, the unit of content means "% by mass (wt%)". The content of a component is preferably the amount of the component contained in a commercial product when the commercial product is used, but may be the amount of the commercial product itself. "And / or" means any one of a plurality of related items listed, or any combination of two or more thereof, or all combinations thereof. "Comprising" means that elements other than the elements explicitly specified as being included may be added (synonymous with "at least comprising"), and encompasses "consisting of" and "consisting essentially of". That is, "comprising" may mean including the explicitly specified elements and any one or more elements, consisting of the explicitly specified elements, or consisting essentially of the explicitly specified elements. Examples of the elements include restrictions such as components, steps, conditions, and parameters. "~" in a numerical range refers to a range including the numerical values before and after it, and a range excluding one of the included limit values is also included. For example, "0 mass% to 100 mass%" may be any of 0 mass% or more and 100 mass% or less, and 0 mass% or more and 100 mass% or less. "About" with respect to a numerical value means including a range of ±10% of the stated numerical value. For example, about 5 mass% is from 4.5 mass% to 5.5 mass%. The number of digits in an integer value matches the number of significant figures. For example, 1 has 1 significant figure, and 10 has 2 significant figures. Similarly, the number of digits after the decimal point in a decimal value matches the number of significant figures. For example, 0.1 has 1 significant figure, and 0.10 has 2 significant figures.

[0021] [Overview of oil-in-water cleansing cosmetics] One aspect of the present invention is an oil-in-water cleansing cosmetic. A "cleansing cosmetic" is a cosmetic that is applied to the skin to dissolve and remove oily dirt such as cosmetics on the skin, and is used for the purpose of cleansing, and is composed of a combination of multiple components. The specific examples of components listed herein are illustrative and are not limited to these, as long as they meet the definition of a component. The components may be obtained by manufacturing by known methods or may be commercially available.

[0022] An oil-in-water cleansing cosmetic composition according to one aspect of the present invention comprises a liquid ester oil (hereinafter also referred to as component (A)), a polyglycerin fatty acid ester (hereinafter also referred to as component (B)), and water (hereinafter also referred to as component (C)).

[0023] Another embodiment of the present invention provides an oil-in-water cleansing cosmetic composition that further comprises, in addition to components (A) to (C), an acrylic acid-based polymer emulsifier (hereinafter also referred to as component (D)).

[0024] Another embodiment of the present invention provides an oil-in-water cleansing cosmetic composition that further comprises, in addition to components (A) to (C), a liquid ester oil different from component (A) (hereinafter also referred to as component (E)).

[0025] Another embodiment of the present invention provides an oil-in-water cleansing cosmetic composition comprising components (A) to (C) and substantially free of a product repellent (hereinafter also referred to as component (F)).

[0026] [Component (A): Liquid ester oil (1)] The liquid ester oil of component (A) is an ester oil of fatty acids and alcohols that is liquid at room temperature (approximately 25°C). Among liquid ester oils, component (A) is selected if its IOB (Internal Oxygen Bloc) is between 0.15 and 0.20. Component (A) primarily functions as a cleansing agent.

[0027] IOB (Inorganic-Organic Balance) is an index of hydrophilicity and hydrophobicity based on an organic conceptual diagram that represents the polarity / nonpolarity of organic compounds. Details of the organic conceptual diagram and IOB are explained, for example, in Fujita's literature (A. Fujita, Pharm. Bull., 2, 163-173 (1954)). Briefly, the organic conceptual diagram assumes that methane (CH4) is the source of all organic compounds, and all other compounds are considered derivatives of methane. A certain numerical value is assigned to each of the carbon number, substituents, transformation sites, and rings, and these scores are added together to obtain the organic value (OV) and inorganic value (IV). This is then plotted on a diagram with the organic value on the X axis and the inorganic value on the Y axis. In the organic conceptual diagram, IOB refers to the ratio of the inorganic value (IV) to the organic value (OV), i.e., "inorganic value (IV) / organic value (OV)". A larger IOB value means greater hydrophilicity, i.e., greater polarity. Note that the IOB value may be the value published by the manufacturer, for example, the value published on the website [https: / / www.nihon-emulsion.co.jp / tech / organic.html].

[0028] Examples of component (A) include isopropyl myristate, isopropyl palmitate, isotridecyl isononanoate, methylheptyl laurate, ethylhexyl isononanoate, isopropyl isostearate, tridecyl neopentanoate, hexyl laurate, and dibutyloctyl sebacate. However, because it has excellent cleansing power, it is preferable that it has a relatively small molecular weight, specifically a molecular weight of 340 or less, and more preferably a molecular weight of 200 to 340 to avoid skin irritation. Furthermore, isopropyl myristate, isopropyl palmitate, and isotridecyl isononanoate are preferred because they can be stably and uniformly dispersed in cosmetics. Component (A) may be one of these alone or a combination of two or more.

[0029] Examples of commercially available ingredients (A) include "Sarakos 913" (Nisshin Oillio Group; IOB 0.15, molecular weight (MW) 340), "IPIS" (Higher Alcohol Industry Co., Ltd.; IOB 0.15; MW 326.5), "NIKKOL GS-MHL" (Nikko Chemicals Co., Ltd.; IOB 0.154; MW 312.5), "NIKKOL IPP" (Nikko Chemicals Co., Ltd.; IOB 0.16; MW 298.5), "CERAPHYL 55" (Ashland; IOB 0.18; MW 284.5), "Cetiol(registered trademark) A" (BASF; IOB 0.18; MW 284.5), "Excepearl IPM" (Kao Corporation; IOB 0.18; MW 270.5), and "ES108109" (Higher Alcohol Industry Co., Ltd.; IOB 0.18; MW Examples include 270.5).

[0030] The amount of component (A) should be sufficient to exert a cleansing effect in the oil-in-water cleansing cosmetic. However, if it is too little, it will not exert a sufficient cleansing effect, and if it is too much, the emulsification stability of the oil-in-water cleansing cosmetic tends to be impaired. Therefore, the amount of component (A) is preferably, for example, 1% to 49% by mass, more preferably 5% to 30% by mass, and even more preferably 10% to 25% by mass or 12% to 22% by mass.

[0031] [Ingredient (B): Polyglycerin fatty acid ester] Component (B), the polyglycerol fatty acid ester, is an ester of a fatty acid and polyglycerol, which is polymerized glycerol. Among polyglycerol fatty acid esters, a polyglycerol fatty acid ester with a degree of polymerization of polyglycerol (number of repeating glycerol units) of 10 is selected as component (B). Component (B) is used as a component included in the aqueous phase and primarily functions as an emulsifier.

[0032] Examples of polyglycerin fatty acid esters having a degree of polymerization of 10 include polyglyceryl-10 laurate, polyglyceryl-10 myristate, polyglyceryl-10 palmitate, polyglyceryl-10 stearate, polyglyceryl-10 isostearate, and polyglyceryl-10 oleate. However, it is preferable that the ester is liquid at room temperature because it has excellent emulsifying properties and can stably and uniformly disperse component (A) and other oily components in cosmetics at room temperature. Polyglyceryl-10 laurate and polyglyceryl-10 isostearate are preferred. Component (B) may be one of these alone or a combination of two or more.

[0033] Examples of commercially available products containing ingredient (B) include: "S-Face (registered trademark) 10G-L" (Sakamoto Pharmaceutical Co., Ltd.; HLB 15.3), "NIKKOL Decaglyn 1-L" (Nikko Chemicals Co., Ltd.; HLB 15.5), "Sunsoft Q-121Y-C" (Taiyo Kagaku Co., Ltd.; HLB 15.7), "S-Face (registered trademark) M-1001" (Sakamoto Pharmaceutical Co., Ltd.; HLB 14.8), "Sunsoft Q-14Y-C" (Taiyo Kagaku Co., Ltd.; HLB 16.7), "NIKKOL Decaglyn 1-PVEX" (Nikko Chemicals Co., Ltd.; HLB 12.5), "S-Face (registered trademark) S-1001P" (Sakamoto Pharmaceutical Co., Ltd.; HLB 14.1), "NIKKOL Decaglyn 1-SV" (Nikko Chemicals Co., Ltd.; HLB 12.0), and "NIKKOL Decaglyn Examples include "1-ISV" (Nikko Chemicals Co., Ltd.; HLB 12.0), "S-Face (registered trademark) IS-1001P" (Sakamoto Pharmaceutical Co., Ltd.; HLB 13.7), "S-Face (registered trademark) 10G-IS" (Sakamoto Pharmaceutical Co., Ltd.; HLB 13.9), "SY-Glister (registered trademark) MO-7S" (Sakamoto Pharmaceutical Co., Ltd.; HLB 12.9), and "NIKKOL Decaglyn 1-OV" (Nikko Chemicals Co., Ltd.; HLB 12.0).

[0034] The amount of component (B) should be sufficient to exert an emulsifying effect in the oil-in-water cleansing cosmetic. However, if it is too little, it will not exert a sufficient emulsifying effect, and if it is too much, it may impart an excessive oil-removing effect and skin irritation effect to the oil-in-water cleansing cosmetic. Therefore, the amount of component (B) is preferably, for example, 0.1% to 10% by mass, more preferably 0.5% to 5% by mass, and even more preferably 1% to 3% by mass.

[0035] A cleansing cosmetic composition according to one aspect of the present invention can exhibit the excellent effect of reducing the amount of component (B), which functions as an emulsifier (surfactant), by using component (A) and component (B). From this viewpoint, the ratio of the content of component (B) to the content of component (A) ([component (B)] / [component (A)]) is preferably 0.005 to 5, more preferably 0.01 to 1, and even more preferably 0.05 to 0.5.

[0036] [Component (C): Water] Component (C), water, is used as the base for the aqueous phase in the manufacture of cosmetics. Component (C) can be any water commonly used to make cosmetics, such as purified water or tap water.

[0037] The amount of component (C) should be such that it constitutes an oil-in-water type cleansing cosmetic, for example, preferably 50% by mass or more, more preferably 51% to 70% by mass, and even more preferably 52% to 65% by mass.

[0038] [Ingredient (D): Acrylic acid-based polymer emulsifier] Component (D), an acrylic acid-based polymer emulsifier, is a polymer emulsifier containing (meth)acrylic acid or its derivative as a constituent unit, and is a copolymer with two or more constituent units. Component (D) is used as a component in the aqueous phase and primarily functions to assist the emulsifying action of component (B).

[0039] Furthermore, the presence or absence of emulsifying properties of the acrylic acid polymer in component (D) can be determined by conducting the following confirmation test. A mixture (emulsifier) ​​of water, oil, and acrylic acid polymer is prepared such that the amount of acrylic acid polymer is 0.2% by mass and the amount of oil is 20% by mass in the total amount of the mixture, and it is confirmed that it emulsifies uniformly. Specifically, a 0.25% by mass aqueous solution of acrylic acid polymer is prepared (for example, 0.2 g of acrylic acid polymer is added to 79.8 g of water, and stirred at 1,000 rpm for 10 minutes with a disperser to achieve uniform dispersion). Then, while stirring at 1,000 rpm with a disperser, one-quarter of the aqueous solution volume (for example, 20 g) of liquid paraffin is gradually added, and the mixture is stirred (emulsified) for 10 minutes to obtain a mixed solution (emulsified). At this time, if an acrylic acid polymer with a specified appropriate pH is used, the pH should be adjusted as appropriate (for example, 5.3 to 5.7) after preparing the aqueous solution and before adding the liquid paraffin. If the mixed solution is visually inspected and separation or a water-oil interface is clearly visible, it is judged to "lack emulsifying properties." If no separation is clearly observed as described above, the mixture will be placed in a standard jar (mayonnaise jar) and left to stand at 40°C for 1 day (24 hours). If the mixture remains uniform throughout, it will be considered to have "emulsifying properties," while if it separates or does not maintain uniformity, it will be judged to lack "emulsifying properties."

[0040] Examples of component (D) include (meth)acrylic acid / (meth)acrylate alkyl copolymer and its salt, (meth)acrylic acid / (meth)acryloyldialkyltaurine copolymer and its salt, and (meth)acrylate hydroxyalkyl / (meth)acryloyldialkyltaurine copolymer and its salt. The acrylic acid-based polymer emulsifier may be one of these alone or a combination of two or more. Note that (meth)acrylic acid is a general term for acrylic acid and methacrylic acid.

[0041] Component (D) is preferably an acrylic acid-based polymer emulsifier of which all constituent units are copolymers having a (meth)acryloyl group, in order to impart excellent long-term stability to the oil-in-water type cleansing cosmetic composition. A (meth)acrylic acid / (meth)acrylate / alkyl copolymer and its salts are more preferable, and an acrylic acid / alkyl acrylate copolymer and its salts are even more preferable. Examples of salts include sodium salts and potassium salts, but potassium salts are preferred because they result in a cosmetic composition with a softer feel.

[0042] A preferred specific example of component (D) is (acrylates / alkyl (C10-30) acrylate) crosspolymer, which is "Pemulen TM TR-1, Pemulen TM These are commercially available as TR-2 (manufactured by Lubrizol Advanced Materials, etc.).

[0043] The amount of component (D) should be such that it can exert an emulsifying effect in the oil-in-water cleansing cosmetic together with component (B). For example, it is preferably 0.01% to 5% by mass, more preferably 0.05% to 1.0% by mass, and even more preferably 0.1% to 0.8% by mass. By having the content of component (D) within these ranges, it is possible to include an amount of component (A) that can assist the emulsifying effect of component (B), allowing the oil-in-water cleansing cosmetic to exhibit excellent cleansing power. However, the content of component (D) may be appropriately set depending on the content of components (A), (B), and (C).

[0044] [Ingredient (E): Liquid ester oil (2)] The liquid ester oil of component (E) is a different liquid ester oil from component (A), and has an IOB of 0.20 to 0.30. Component (E), together with component (A), functions as a cleansing agent.

[0045] Examples of component (E) include isononyl isononanoate, isodecyl neopentanoate, neopentyl glycol dicaprate, PG dicaprate, and diethylhexyl sebacate, but isononyl isononanoate is preferred because it has excellent cleansing power. Component (E) may be one of these alone or a combination of two or more.

[0046] Examples of commercially available products containing ingredient (E) include "FineNeo TMExamples include "-EHS" (Nippon Seika Co., Ltd.; IOB 0.24; MW 426.67), "Estemol N-01" (Nisshin Oillio Group Co., Ltd.; IOB 0.25; MW 412.65), "NIKKOL PDD" (Nikko Chemicals Co., Ltd.; IOB 0.26; MW 384.59), "Saracos 99" (Nisshin Oillio Group Co., Ltd.; IOB 0.20; MW 284.48), and "Neolite 100P" (Higher Alcohol Industry Co., Ltd.; IOB 0.22; MW 242.41).

[0047] Since an excessive amount of component (E) tends to impair the emulsification stability of the oil-in-water type cleansing cosmetic, it is preferable that the amount of component (E) be less than the amount of component (A), more preferably 0% to 20% by mass, even more preferably 0% to 10% by mass, and still more preferably 0% to 5% by mass.

[0048] An oil-in-water cleansing cosmetic composition according to one aspect of the present invention maintains a stable emulsified state due to the emulsifying action of component (B), even when it contains component (E). From this viewpoint, the ratio of the content of component (B) to the content of component (E) ([component (B)] / [component (E)]) is preferably 0.1 to 5, more preferably 0.3 to 3, and even more preferably 0.5 to 2.

[0049] [Ingredient (F): Repellent ingredient] Cyclic silicones such as cyclotetrasiloxane, cyclopentasiloxane, and cyclohexasiloxane require caution when used due to concerns about their impact on aquatic ecosystems. Therefore, it is preferable that oil-in-water cleansing cosmetics substantially do not contain cyclic silicones such as cyclotetrasiloxane, cyclopentasiloxane, and cyclohexasiloxane.

[0050] "Substantially free" of cyclic silicones means that, except in cases where cyclic silicones are inevitably mixed in with other components through raw materials or manufacturing processes containing cyclic silicones, they are intentionally not included in the oil-in-water cleansing cosmetic. Therefore, "substantially free" means either completely free or, if present, in extremely small amounts. Preferably, the total content of cyclic silicones is 0% to 1% by mass, more preferably 0% to 0.5% by mass, and even more preferably 0% to 0.1% by mass.

[0051] [Other ingredients] The oil-in-water cleansing cosmetic composition may contain other components in addition to components (A), (B), and (C), and optionally components (D) and (E), as long as it can solve the problems of the present invention.

[0052] For example, by using a polyglycerin fatty acid ester with a degree of polymerization of 4 to 6 as an emulsifying aid in addition to component (B), the resulting oil-in-water cleansing cosmetic tends to reduce the stickiness derived from component (A), allow for a cleaner rinse, and improve the moisturizing effect on the skin after rinsing. For example, when a polyglycerin fatty acid ester with a degree of polymerization of 4 to 6 is included, the ratio of the content of component (B) to the content of the polyglycerin fatty acid ester with a degree of polymerization of 4 to 6 ([Component (B)] / [Polyglycerin fatty acid ester with a degree of polymerization of 4 to 6]) is preferably 0.1 to 30, more preferably 0.2 to 10, and even more preferably 0.5 to 5.

[0053] Other ingredients include, for example, ingredients commonly used in cleansing cosmetics, and more specifically, oils, emulsifying agents, moisturizers, stabilizers, preservatives, pH adjusters, antioxidants, cooling agents, thickeners, chelating agents, whitening agents, vitamins, beauty ingredients, medicinal ingredients, and fragrances. The content of these other ingredients can be appropriately determined by those skilled in the art, as long as it does not hinder the solving of the problem of the present invention. Some of these other ingredients are listed below, but these are merely examples and not limiting.

[0054] Examples of oily agents include oily emollient components that are liquid at room temperature (approximately 25°C) and / or have a relatively large molecular weight. Specifically, these include squalane, mineral oil, pentaerythrityl tetraethylhexanoate, phytosteryl / octyldodecyl lauroyl glutamate, polyglyceryl-2 tetraisostearate, triethylhexanoin, diisostearyl malate, ethylhexyl palmitate, cetyl ethylhexanoate, pentaerythrityl tetraisostearate, dimethicone, methylphenylpolysiloxane, diphenylsiloxyphenyl trimethicone, hydrogenated poly(C6-12 olefin), polyglyceryl-2 triisostearate, olive fruit oil, jojoba seed oil, lavender oil, evening primrose oil, avocado oil, camellia seed oil, and macadamia seed oil. Furthermore, oily emollient components that are solid at room temperature (approximately 25°C), such as fatty acids like stearic acid and behenic acid, and higher alcohols like cetanol, stearyl alcohol, and behenyl alcohol, or oily emollient components that are paste-like at room temperature (approximately 25°C), such as petrolatum, dipentaerythrityl hexahydroxystearate, and dimer dilinoleyl bis(behenyl / isostearyl / phytosteryl) dimer dilinoleate, are mainly cited as contributing to the excipient role of the formulation. These can be used individually or in combination of two or more. The oil content is preferably, for example, 1% to 25% by mass, and more preferably 5% to 20% by mass. Furthermore, when manufacturing is carried out at virtually room temperature (energy saving) in consideration of the environment, the solid oil and paste oil are preferably 0% to 1.5% by mass, more preferably 0% to 0.8% by mass, and even more preferably 0% to 0.1% by mass, in order to achieve uniform and stable emulsification.

[0055] The emulsifying aid can be any emulsifier other than components (B) and (D). For example, it is preferably a hydrophilic emulsifier having a hydrophilic-lipophilic balance (HLB) of 7 or higher, more preferably a hydrophilic emulsifier having an HLB of 7 to 18, and even more preferably an emulsifier having an HLB of 8 to 16. Examples of emulsifiers with an HLB of 8 to 16 include polyglyceryl fatty acid esters of polyglycerin with a degree of polymerization of less than 10, such as polyglyceryl-6 caprylate, polyglyceryl-6 dicaprate, and polyglyceryl-6 laurate; polyoxyethylene glycerin fatty acid esters such as PEG-15 glyceryl stearate and PEG-15 glyceryl isostearate; and polyoxyethylene glycerin fatty acid esters such as polysorbate 40, polysorbate 60, polysorbate 80, and PEG-20 sorbitan isostearate. Examples include ethylene sorbitan fatty acid esters; polyoxyethylene sorbitan fatty acid esters such as sorbeth-6 laurate, sorbeth-40 tetraoleate, and sorbeth-60 tetraoleate; polyoxyethylene hydrogenated castor oil such as PEG-50 hydrogenated castor oil and PEG-60 hydrogenated castor oil; polyethylene glycol fatty acid esters such as PEG-10 laurate, PEG-10 stearate, and PEG-25 stearate; and lecithin derivatives such as hydrogenated lecithin and hydrogenated lysolecithin. The emulsifying agent may be one of these alone or a combination of two or more. The content of the emulsifying agent is preferably 0% to 5% by mass, for example, to promote emulsification of oil-in-water type cleansing cosmetics.

[0056] Examples of thickening agents include water-soluble polysaccharides, organic thickening agents, inorganic water-soluble polymers, and non-emulsifying acrylic acid polymers other than component (D). More specifically, examples include microbial-derived thickening agents such as xanthan gum, hydroxypropyl xanthan gum, dextran, sclerotium gum, and gellan gum; seaweed-derived thickening agents such as carrageenan, alginate, propylene glycol alginate, agar, and fucoidan; cellulose-based thickening agents such as methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxymethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, carboxyethylcellulose, and stearoxyhydroxypropylmethylcellulose; and kora Examples include amino acid-based thickeners such as hydroxypropyl alcohol; polyethylene glycol-based thickeners such as polyethylene glycol and polyethylene glycol distearate; urethane-based thickeners such as (PEG-240 / decyl tetratredeceth-20 / HDI) copolymer and polyurethane-59; inorganic water-soluble polymers such as (Al / Mg) silicate; starch-based thickeners such as hydroxypropyl starch phosphate and corn starch; and acrylic acid-based polymers such as carboxyvinyl polymer, polyacrylic acid, and (acrylates / alkyl acrylate (C10-30)) crosspolymer (excluding acrylic acid-based polymer emulsifiers).

[0057] Examples of humectants include glycerin, concentrated glycerin, butylene glycol (BG), propylene glycol (PG), diglycerin, dipropylene glycol (DPG), pentylene glycol, 1,2-hexanediol, heptanediol, ethylhexylglycerin, methyl gluceth-10, methyl gluceth-20, PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, polyethylene glycol, polyquaternium-51, trehalose, xylitol, maltitol, maltose, sorbitol, erythritol, raffinose, glucose, fructose, hydrolyzed elastin, sodium lactate, cyclodextrin, pyrrolidone carboxylic acid, hyaluronic acid, sodium hyaluronate, acetylated hyaluronic acid, sodium acetylated hyaluronate, and sodium chondroitin sulfate. These can be used individually or in combination of two or more. The content of the humectant is preferably 0% to 10% by mass.

[0058] Examples of stabilizers include ethanol, ascorbic acid, sodium ascorbate, erythorbic acid, citric acid, disodium edetate, tetrasodium edetate, pentasodium diethylenetriaminepentaacetate, sodium polyphosphate, sodium metaphosphate, sodium phytate, and trisodium phosphate. These can be used individually or in combination of two or more. The stabilizer content is preferably 0% to 10% by mass.

[0059] Examples of preservatives include phenoxyethanol, methylparaben, propylparaben, benzoic acid, salicylic acid, carbolic acid, sorbic acid, parachlormethacresol, hexachlorophene, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, and photosensitizers. These can be used individually or in combination of two or more. The preservative content is preferably 0% to 5% by mass.

[0060] Examples of antioxidants include vitamin E and its derivatives such as dibutylhydroxytoluene, butylhydroxyanisole, tocopherol, and tocopherol acetate; thiotaurine, evening primrose extract, beta-carotene, catechin compounds, flavonoid compounds, polyphenol compounds, and sodium pyrosulfite. These can be used individually or in combination of two or more. The antioxidant content is preferably 0% to 5% by mass.

[0061] Examples of pH adjusting agents include lactic acid, citric acid, sodium citrate, glycolic acid, succinic acid, tartaric acid, malic acid, sodium malate, etidronic acid, potassium carbonate, sodium bicarbonate, ammonium bicarbonate, sodium hydroxide, potassium hydroxide, arginine, triethanolamine, and monoethanolamine. These can be used individually or in combination of two or more. The pH adjusting agent content is preferably 0% to 10% by mass. pH adjusting agents are also called neutralizing agents.

[0062] Examples of beauty ingredients include apple tannin, licorice root extract, resveratrol, isomerized sugar, Morinda citrus fruit juice, Citrus unshiu peel extract, dipotassium glycyrrhizate, stearyl glycyrrhetinate, and tranexamic acid. These can be used individually or in combination of two or more. The content of the beauty ingredients is preferably 0% to 5% by mass.

[0063] The fragrance can be a commercially available product or an essential oil. Examples include rosehip oil, geranium oil, palmarosa oil, peppermint oil, Roman chamomile flower oil, and tea tree leaf oil. These can be used individually or in combination of two or more. The fragrance content is preferably 0% to 1% by mass.

[0064] [Oil-in-water cleansing cosmetic] An oil-in-water cleansing cosmetic composition according to one aspect of the present invention is used as a cleansing cosmetic and has the functions and / or effects thereof. Preferably, the oil-in-water cleansing cosmetic composition according to one aspect of the present invention has good emulsifying properties and cleansing power, and more preferably, it also has a good feel when used.

[0065] The emulsification stability of the oil-in-water type cleansing cosmetic composition is preferably such that, for example, when prepared immediately after being placed at room temperature using the method described in the examples below, no emulsification failure is observed and it is evaluated as "○". More preferably, it is such that when left standing at 50°C for one month, no emulsification failure is observed and it is evaluated as "○".

[0066] The cleansing power of the oil-in-water type cleansing cosmetic is preferably such that, for example, by the method described in the examples below, no makeup remains on the skin surface and in the grooves after cleansing, and is more preferably such that it is rated as "◎" or "○".

[0067] The feel of the oil-in-water cleansing cosmetic is preferably such that it is rated as "◎" or "○" by the method described in the examples below, and more preferably so that it is rated as "◎".

[0068] The specific embodiment of the oil-in-water cleansing cosmetic is as follows, with the following content of components (A) to (C). Component (A): 5% by mass to 30% by mass Component (B): 0.5% by mass to 5% by mass Component (C): 51% by mass to 70% by mass

[0069] Another specific embodiment of the oil-in-water cleansing cosmetic is one in which components (A) to (D) are present in the following amounts. Component (A): 5% by mass to 30% by mass Component (B): 0.5% by mass to 5% by mass Component (C): 51% by mass to 70% by mass Component (D): 0.05% by mass ~ 1.0% by mass

[0070] Another specific embodiment of the oil-in-water cleansing cosmetic is one in which components (A) to (E) are present in the following amounts. Component (A): 5% by mass to 30% by mass Component (B): 0.5% by mass to 5% by mass Component (C): 51% by mass to 70% by mass Component (D): 0.05% by mass ~ 1.0% by mass Component (E): 0% by mass to 10% by mass

[0071] Another specific embodiment of the oil-in-water cleansing cosmetic is one in which components (A) to (F) are present in the following amounts. Component (A): 5% by mass to 30% by mass Component (B): 0.5% by mass to 5% by mass Component (C): 51% by mass to 70% by mass Component (D): 0.05% by mass ~ 1.0% by mass Component (E): 0% by mass to 10% by mass Component (F): 0% by mass ~ 0.5% by mass

[0072] Another specific embodiment of the oil-in-water cleansing cosmetic is one in which components (A) to (F) are present in the following amounts. Component (A): 12% by mass to 22% by mass Component (B): 1% by mass to 3% by mass Component (C): 52% by mass to 65% by mass Component (D): 0.1% by mass ~ 0.8% by mass Component (E): 0% by mass to 5% by mass Component (F): 0% by mass ~ 0.1% by mass

[0073] Regarding the specific embodiment of the oil-in-water cleansing cosmetic described above, the content of the components (hereinafter, [Component (X)] indicates the content of Component (X)) is preferably in one of the following relationships: [Component (B)] / [Component (A)]: 0.005~5 [Component (B)] / [Component (E)]: 0.1~5 [Component (A)]>[Component (E)]

[0074] The appearance of an oil-in-water cleansing cosmetic may vary depending on the ingredients it contains, but it is preferably a translucent or opaque milky white to white emulsion, and more preferably a cream.

[0075] Oil-in-water cleansing cosmetics have a relatively high oil content and a viscosity high enough that they do not drip when applied to the skin. For example, the viscosity (at 20°C) should be 50,000 mPa·s or higher, preferably between 50,000 mPa·s and 1,000,000 mPa·s, more preferably between 70,000 mPa·s and 600,000 mPa·s, and even more preferably between 100,000 mPa·s and 500,000 mPa·s.

[0076] Oil-in-water cleansing cosmetics are preferably formulated to be less irritating to the skin. For example, the pH of the oil-in-water cleansing cosmetic is preferably near neutral, more preferably between 5 and 9, and even more preferably between 6 and 8.

[0077] Oil-in-water cleansing cosmetics can be manufactured, for example, by separating the components into an aqueous phase, an oil phase, a neutralization phase, etc., preparing each phase, and then mixing them to ensure that the components are homogeneous overall. If any of the other components are solidified, it is preferable to heat and dissolve them beforehand. The temperature for heating is not particularly limited, but for example, it is 65°C to 85°C.

[0078] Specifically, an oil-in-water cleansing cosmetic composition according to one aspect of the present invention can be obtained by emulsifying a mixture of components (A) to (C), optionally component (D) and component (E), and other components. For example, a suspension can be obtained by adding a neutralizing phase to an aqueous phase containing component (B), component (C), and optionally component (D) and mixing, then adding an oil phase containing component (A) and optionally component (E) and mixing, followed by an emulsification process to obtain an oil-in-water cleansing cosmetic composition. More specifically, the oil-in-water cleansing cosmetic composition can be prepared by the method described in the examples below.

[0079] Oil-in-water cleansing cosmetics can be prepared according to the desired mode of use and dosage form, for example, in the form of cream, lotion, or gel, and can be applied to containers such as jars, tubes, bottles, pouches, portion cups, and pumps, depending on their viscosity.

[0080] Oil-in-water cleansing cosmetics can be used to remove oily dirt such as makeup. The method of use for oil-in-water cleansing cosmetics should be appropriately selected according to the mode of use and dosage form. For example, if the oil-in-water cleansing cosmetic is a cleansing cream, take an appropriate amount in your hand, apply it to your face and blend it well with the makeup, then rinse it off with running water to remove the makeup dirt from the skin along with the cleansing cream. Furthermore, after using oil-in-water cleansing cosmetics, the skin is expected to feel moist and retain moisture, and in particular, by containing a certain amount or more of water and moisturizers, it is possible to improve dry skin to which the product has been applied or to prevent further deterioration due to dryness.

[0081] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples, and can take various forms as long as it can solve the problems of the present invention. [Examples]

[0082] [1. Preparation of the test cosmetic] According to the formulations shown in Tables 1 and 2, various oil-in-water cosmetic compositions were prepared as test cosmetics using the following procedure. The numerical values ​​indicating the content of the components in the tables represent mass % (wt%).

[0083] Components 1-5 were heated and mixed to 70°C, then components 6-15 at room temperature were added and uniformly dissolved and mixed at room temperature to prepare the aqueous phase. Components 16-25 were then uniformly dissolved and mixed at room temperature to prepare the oil phase.

[0084] Next, component 26 (neutralization phase) was added to the aqueous phase and neutralized by gently stirring with a paddle for 10 minutes.

[0085] The resulting neutralization mixture (aqueous phase + neutralization phase) was mixed with an oil phase and emulsified using a disperser ("Labo-Solution"; Primix) at room temperature at 2,000 rpm for 10 minutes to obtain a milky white cream-like test cosmetic.

[0086] [2. Evaluation Method] The test cosmetic was evaluated according to the following procedures.

[0087] (2-1) Emulsifying property The emulsification state of the test cosmetic immediately after preparation was evaluated visually according to the following criteria. [Presence or absence of syneresis, separation, or emulsification defects] ○: The entire cosmetic product is uniform, and no separation of liquid, layer separation, or other emulsification defects are observed. ×: Separation or layer separation is observed in the cosmetic product.

[0088] Furthermore, the test cosmetic was filled into standard glass bottles (7K bottles) and stored in a constant temperature bath at 50°C for one month. The long-term stability of the emulsification was evaluated by visually inspecting the test cosmetic after storage, and marked with "○" or "×" as described above.

[0089] (2-2) Functionality: Cleansing power (2-2-1) Test cosmetics 1-4 The cleansing power was evaluated by conducting the following tests on five trained panelists.

[0090] For a commercially available cream foundation ("Ayaka Bright Up Cream Foundation"; Chifure Cosmetics Co., Ltd.), a 6mm diameter amount was placed on the inner side of the forearm and spread evenly in a 5.5cm diameter circle, then allowed to dry. Next, a 1cm diameter amount of the test cosmetic was taken into the center of the dried foundation and blended with a finger to cover the entire foundation, then rinsed off with running water. The skin surface and grooves were visually observed after cleansing, and the cleansing power was evaluated on a 5-point scale according to the following criteria.

[0091] [Evaluation Criteria] 5 points: Cream foundation was removed by more than 90%. 4 points: Cream foundation was removed by more than 70% but less than 90%. 3 points: 50% to less than 70% of the cream foundation was removed. 2 points: 30% to less than 50% of the cream foundation was removed. 1 point: Less than 30% of the cream foundation was removed.

[0092] The cleansing power was evaluated based on the total score according to the following criteria. [Evaluation Criteria] ◎: Total score of 20 points or more ○: Total score between 17.5 and 20 points △: Total score is between 15 and 17.5 points. ×: Total score less than 15 points

[0093] (2-2-2) Test cosmetic 5-8 The panelist with the highest accuracy among those described in (2-2-1) above was selected to test and evaluate the cleansing power of commercially available cream foundations, in the same manner as described in (2-2-1). The evaluation criteria were as follows: 5 points = "◎", 4 points = "○", 3 points = "△", and 2 to 1 point = "×".

[0094] (2-3) Physical properties: viscosity The test cosmetic was placed in a "Mayonnaise Bottle M-225" (Tokyo Glass Co., Ltd.) and left to stand overnight at 20°C. Then, using a BM-type viscometer ("VISCOMETER TVB-25L"; Toki Sangyo Co., Ltd.), the viscosity value (mPa·s) was measured 2 minutes after the start of measurement under the conditions of SPINDLE No. M4 and 1.5 rpm.

[0095] (2-4) Usability: pH The pH of the test cosmetic was measured using a pH meter, "pH METER PH-SE" (Horiba, Ltd.).

[0096] (2-5) Usability (2-5-1) Test cosmetics 1-4 Five trained panelists were tested in the same manner as described in (2-2) above, and evaluated on a 5-point scale for "makeup blendability," "non-greasy feel," and "moisturizing effect" according to the following evaluation criteria. The control product used for comparison was the commercially available "Ayaka Cleansing Cream" (Chifure Cosmetics Co., Ltd.), an oil-in-water type cleansing cream containing cyclopentasiloxane as the most abundant ingredient in the formulation.

[0097] The user experience of the test cosmetic was evaluated based on the sum of the scores for each item, according to the following overall evaluation criteria.

[0098] [Evaluation criteria] "Makeup Blending": The speed at which the makeup dissolves into the cosmetic when the test cosmetic is applied and blended into a dried foundation. "No stickiness": After washing off the makeup, there is no lingering oily feeling on the skin from the oily components of the makeup. "Moisturizing feeling": After washing off makeup and lightly patting the skin with a towel, the skin feels moisturized and not dry, giving the impression of being slightly damp.

[0099] [Evaluation Criteria] 5 points: Superior to the control product. 4 points: Slightly better than the control product. 3 points: Equivalent to the control product. 2 points: Slightly inferior to the comparison product, but no problems in use. 1 point: Inferior to the control product.

[0100] [Overall Evaluation Criteria] ◎: Total score of 50 points or higher across the three categories of user experience. ○: Total score for the three items related to user experience is between 45 and 50 points. △: Total score of the three items related to user experience is between 40 and 45 points. ×: Total score of the three items related to user experience is less than 40 points.

[0101] (2-5-2) Test cosmetic 5-8 The panelist with the highest accuracy among those described in (2-5-1) above was selected to test and evaluate the feel of the test cosmetic in the same manner as described in (2-5-1). The evaluation criteria were as follows: a total score of 11 points or higher for the three items was marked "◎", 9 to 10 points was marked "○", 7 to 8 points was marked "△", and 6 points or lower was marked "×".

[0102] [3. Evaluation Results] The evaluation results of the test cosmetics are shown in Tables 1 and 2. As shown in Tables 1 and 2, the test cosmetics of Examples 1 to 8 had good emulsification properties and possessed excellent cleansing power equivalent to or better than the control test cosmetic containing cyclic silicone. The test cosmetics of Examples 1 to 8 had a pH of 7.0 to 7.4 and a viscosity in the range of 190,000 mPa·s to 500,000 mPa·s. In contrast, the test cosmetics of Comparative Examples 1 to 3, which did not contain liquid ester oil with an IOB of 0.15 or more and less than 0.20 or polyglycerin fatty acid ester with a degree of polymerization of 10, had poor emulsification properties and could not be obtained as stable oil-in-water cosmetics.

[0103] Furthermore, the test cosmetics in Examples 1-8 all exhibited excellent usability, being easily absorbed by makeup, leaving little stickiness after rinsing, feeling refreshing, and providing a moisturizing sensation. In particular, the test cosmetic in Example 1 was outstanding in its lack of stickiness.

[0104] From the above results, it was found that an oil-in-water cleansing cosmetic containing a liquid ester oil with an IOB of 0.15 or more and less than 0.20 as a cleansing agent, and a polyglycerin fatty acid ester with a degree of polymerization of 10 as an emulsifier, exhibits excellent emulsifying properties and cleansing power, as well as superior usability.

[0105] [Table 1]

[0106] [Table 2]

[0107] The following is an excerpt of the product names used from the ingredients and raw materials listed in Tables 1 and 2. *1 Polyglyceryl-10 isostearate: "S-Face (registered trademark) 10G-IS" (Sakamoto Pharmaceutical Co., Ltd.) *2 Polyglyceryl-4 laurate: "SY Glystar (registered trademark) ML-310" (Sakamoto Pharmaceutical Co., Ltd.) *3 Polyglyceryl-10 laurate: "S Face (registered trademark) 10G-L" (Sakamoto Pharmaceutical Co., Ltd.) *4 Polyglyceryl-6 caprylate: "Sunsoft Q-8H-C" (Taiyo Kagaku Co., Ltd.) *5 (Acrylates / C10-30 Alkyl Acrylate) Crosspolymer: "Pemulen TM TR-1” (Lubrizol Advanced Materials) *6 (Acrylates / C10-30 Alkyl Acrylate) Crosspolymer: "Carbopol® Ultrez 21 Polymer" (Lubrizol Advanced Materials) *7 Isotridecyl isononanoate: "Sarakos 913" (Nisshin Oillio Group Co., Ltd.) *8 Isopropyl palmitate: "NIKKOL IPP" (Nikko Chemicals Co., Ltd.) *9 Isopropyl myristate: "Excepearl IPM" (Kao Corporation) *10 Isononyl isononanoate: "Sarakos 99" (Nisshin Oillio Group Co., Ltd.)

[0108] Similar to the test cosmetics in Examples 1-8, formulations 1-3 are shown in Tables 3-5 below as other specific examples of oil-in-water cleansing cosmetics that exhibit excellent emulsifying and cleansing properties, as well as superior usability. All formulations 1-3 had a pH of 6.0-7.5 and a viscosity within the range of 100,000 mPa·s-500,000 mPa·s.

[0109] (Example prescription 1) Cleansing cream Prescription Example 1 was prepared according to the following procedure, following the prescription shown in Table 3. Components 1-3 were heated and mixed to 70°C, then components 4-10 at room temperature were added and uniformly dissolved and mixed at room temperature to prepare the aqueous phase. Components 11-17 were then uniformly dissolved and mixed at room temperature to prepare the oil phase. Next, component 18 (neutralization phase) was added to the aqueous phase and neutralized by gently stirring with a paddle for 10 minutes. The resulting neutralization mixture (aqueous phase + neutralization phase) was mixed with an oil phase and emulsified by stirring at room temperature at 2,000 rpm for 10 minutes using a disperser ("Labo-Solution"; manufactured by Primix) to obtain a milky white cream-like cosmetic.

[0110] [Table 3]

[0111] (Example prescription 2) Cleansing cream Prescription Example 2 was prepared according to the following procedure, following the prescription shown in Table 4. Components 1-3 were heated and mixed to 70°C, then components 4-9 at room temperature were added and uniformly dissolved and mixed at room temperature to prepare the aqueous phase. Components 10-15 were then uniformly dissolved and mixed at room temperature to prepare the oil phase. Next, the oil phase was added to the aqueous phase, and the mixture was emulsified by stirring at room temperature at 3,000 rpm for 10 minutes using a disperser ("Labo-Solution"; manufactured by Primix) to obtain a milky white cream-like cosmetic. [Table 4] The following is an excerpt of the product names used from the ingredients and raw materials listed in Table 4. *11 SIMULGEL EG QD (SEPPIC; Polymer purity 35-40%)

[0112] (Prescription Example 3) Cleansing Cream Prescription Example 3 was prepared according to the following procedure, following the prescription shown in Table 5. Components 1-3 were heated and mixed to 70°C, then components 4-8 at room temperature were added and uniformly dissolved and mixed at room temperature to prepare the aqueous phase. Components 9-15 were then uniformly dissolved and mixed at room temperature to prepare the oil phase. Next, component 16 (neutralization phase) was added to the aqueous phase and neutralized by gently stirring with a paddle for 10 minutes. The resulting neutralization mixture (aqueous phase + neutralization phase) was mixed with an oil phase and emulsified by stirring at room temperature at 2,000 rpm for 10 minutes using a disperser ("Labo-Solution"; manufactured by Primix) to obtain a milky white cream-like cosmetic.

[0113] [Table 5] [Industrial applicability]

[0114] One embodiment of the present invention, an oil-in-water cleansing cosmetic, has cleansing power, stable emulsification, and a refreshing, pleasant feel due to its oil-in-water structure, making it suitable for use as a cleansing cosmetic such as a cream. Users can comfortably use the oil-in-water cleansing cosmetic according to one embodiment of the present invention on a daily basis to remove oily contaminants from the skin, such as makeup and dirt.

Claims

1. An oil-in-water type cleansing cosmetic, The following ingredients (A) to (C) (A) Liquid ester oil with an IOB of 0.15 or more and less than 0.20 (B) Polyglycerin fatty acid ester having a degree of polymerization of 10 (C) Water including, The aforementioned oil-in-water type cleansing cosmetic.

2. The oil-in-water cleansing cosmetic composition according to claim 1, wherein the ratio of the content of component (B) to the content of component (A) ([component (B)] / [component (A)]) is 0.01 to 1.

3. Furthermore, the following component (D) (D) Acrylic acid-based polymer emulsifier An oil-in-water cleansing cosmetic according to claim 1, comprising:

4. Furthermore, the following component (E) (E) Liquid ester oil having an IOB of 0.20 to 0.30 including, and The content of component (A) is greater than the content of component (E). The oil-in-water cleansing cosmetic composition according to claim 1.

5. Furthermore, the following ingredient (F) (F) Cyclic silicone An oil-in-water cleansing cosmetic according to any one of claims 1 to 4, which substantially does not contain the above.

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