Oil-based solid cleansing cosmetics

Abstract

To provide an oil-based solid cleansing cosmetic which is excellent in stability over time and has good cleansing properties (ability to remove makeup cosmetics) and usability (no stickiness after rinsing). [Solution] An oil-based solid cleansing cosmetic composition containing (A) natural wax (excluding those derived from petroleum) [component (A)], (B) one or more selected from polyglycerin fatty acid esters and polyoxyethylene glycerin fatty acid esters [component (B)], and (C) a liquid ester oil [component (C)], wherein component (C) contains ethylhexyl hydroxystearate.

Description

[Technical Field]

[0001] The present invention relates to an oily solid cleansing cosmetic preparation. [Background technology]

[0002] In recent years, oil-based solid cleansing cosmetics have been proposed for the purpose of removing makeup cosmetics. Oil-based solid cleansing cosmetics are characterized by being solid at room temperature and therefore capable of removing makeup cosmetics without dripping during use.

[0003] Patent Document 1 discloses a solid oil-based cleansing cosmetic that contains (A) 5 to 15 mass% of a hydrocarbon oil having a melting point of 60 to 120°C, (B) a liquid oil containing 35 mass% or more of an ester oil based on the total amount of the liquid oil, and (C) 5 to 30 mass% of a nonionic surfactant having an HLB value of 5 to 13. Patent Document 2 discloses an oil-based cleansing cosmetic that contains (A) one or more of polyoxyethylene-20 glyceryl triisostearate or polyoxyethylene-20 glyceryl trioleate, and (B) decaglyceryl monoisostearate. Patent Document 3 discloses an oil-based solid cleansing cosmetic that contains (A) hydrogenated castor oil, (B) a hydrocarbon wax, (C) an ester oil having a viscosity of 50 mPa·s or less at 25°C, and (D) a nonionic surfactant, wherein the content of component (A) is 1 to 5 mass%, the content of component (B) is 1 to 5 mass%, the content of component (C) is 60 mass% or more, and the total content of components (A) and (B) is 4 to 7.5 mass%. Patent Document 4 discloses an oil-based cleansing cosmetic that contains an oil component, a branched fatty acid ester-based nonionic surfactant, a polyhydric alcohol, water, a protease, and glyceryl glucoside in a total content of 0.1 to 0.5%. Patent Document 5 discloses a solid oil-based cleansing cosmetic containing (A) one or more nonionic surfactants, (B) one or more hydrocarbons having a melting point of 40 to 120°C, and (C) hydrogenated palm kernel oil. Patent Document 6 discloses a cleansing cosmetic containing (A) 90 to 95% by mass of ester oil, (B) 5 to 10% by mass of hydrocarbon oil that is liquid at room temperature, (C) 1 to 10% by mass of hydrocarbon oil that is solid at room temperature, and (D) 10 to 20% by mass of a nonionic surfactant having an HLB of 3 to 14, wherein the component (D) contains at least two or more types.

[0004] In conventional techniques, in order to suppress sweating (the phenomenon in which oil droplets ooze out from the surface like beads of sweat) in oil-based solid cleansing cosmetics, a formula has been adopted in which the amount of solid oil such as wax is increased to harden the product. However, such a formula has problems such as reduced cleansing ability and residue remaining on the skin when rinsed off. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-206974 [Patent Document 2] JP 2016-199600 A [Patent Document 3] Patent Publication No. 2021-046387 [Patent Document 4] Japanese Patent Application Laid-Open No. 2016-216417 [Patent Document 5] Japanese Patent Publication No. 2020-200263 [Patent Document 6] Japanese Patent Publication No. 2020-143011 Summary of the Invention [Problem to be solved by the invention]

[0006] In recent years, with the growing preference for cosmetics made with naturally derived ingredients, there has been a demand for oil-based solid cleansing cosmetics that use natural wax as a solid oil. The present invention provides an oil-based solid cleansing cosmetic that is stable over time and has good cleansing properties (ability to remove makeup cosmetics) and usability (non-sticky feeling after rinsing). [Means for solving the problem]

[0007] The present invention provides an oil-based solid cleansing cosmetic composition comprising (A) a natural wax (excluding petroleum-derived waxes) [component (A)], (B) one or more members selected from polyglycerol fatty acid esters and polyoxyethylene glycerol fatty acid esters [component (B)], and (C) a liquid ester oil [component (C)], wherein component (C) contains ethylhexyl hydroxystearate. [Effects of the Invention]

[0008] According to the present invention, an oil-based solid cleansing cosmetic composition can be obtained which has excellent stability over time and which has good cleansing properties (ability to remove makeup cosmetics) and ease of use (no stickiness after rinsing). DETAILED DESCRIPTION OF THE INVENTION

[0009] [Oily based solid cleansing cosmetic] The oil-based solid cleansing cosmetic of the present invention (hereinafter also referred to as the cleansing cosmetic of the present invention) contains (A) a natural wax (excluding petroleum-derived waxes) [referred to as component (A)], (B) one or more selected from polyglycerol fatty acid esters and polyoxyethylene glycerol fatty acid esters [referred to as component (B)], and (C) a liquid ester oil [referred to as component (C)].

[0010] <Component (A)> Component (A) used in the cleansing cosmetic of the present invention is a natural wax (excluding petroleum-derived waxes). Natural wax as used herein refers to solid oils derived from animals, plants, petroleum, or minerals, with a melting point of 60°C or higher. Of these natural waxes, component (A) in the present invention may be, for example, any natural wax excluding petroleum-derived wax, natural gas-derived wax, mineral-derived wax, and earth's wax (ceresin).

[0011] Component (A) is preferably a plant-derived wax, such as sunflower seed wax, carnauba wax, candelilla wax, rice bran wax, jojoba wax, beeswax, and hydrogenated castor oil, and is preferably one or more selected from sunflower seed wax and beeswax.

[0012] Component (A) is preferably, for example, a combination of sunflower seed wax and beeswax, and the mass ratio of the sunflower seed wax content to the beeswax content [beeswax / sunflower seed wax] is, for example, preferably 0.5 or more, more preferably 1 or more, even more preferably 2 or more, and preferably 3 or less.

[0013] <Ingredient (B)> Component (B) used in the cleansing cosmetic of the present invention is formulated to achieve good cleansing properties (ability to remove makeup cosmetics), and is one or more species selected from polyglycerin fatty acid esters and polyoxyethylene glycerin fatty acid esters, and is preferably one or more species selected from the group consisting of the following (B1) and (B2):

[0014] (B1) Polyglycerol fatty acid ester, in which the number of carbon atoms in the fatty acid moiety is 8 to 18 and the average degree of polymerization of glycerol is 2 to 10 [hereinafter referred to as component (B1)] (B2) Polyoxyethylene glycerin fatty acid ester, in which the number of carbon atoms in the fatty acid moiety is 8 to 18 and the average number of moles of oxyethylene groups added is 15 to 20 (hereinafter referred to as component (B2)).

[0015] Component (B1) is a polyglycerol fatty acid ester in which the number of carbon atoms in the fatty acid moiety is 8 to 18 and the average degree of polymerization of glycerin is 2 to 10. The number of carbon atoms in the fatty acid moiety refers to the number of carbon atoms in the hydrocarbon group containing the carbon atom of the carboxyl group in the raw material fatty acid of the polyglycerol fatty acid ester.

[0016] The fatty acid moiety of the polyglycerol fatty acid ester preferably has 8 to 18 carbon atoms, for example, and from the viewpoint of cleansing ability (ability to remove makeup cosmetics), for example, it is more preferably 13 to 18 carbon atoms, and even more preferably 18 carbon atoms. The fatty acid moiety of the polyglycerol fatty acid ester is not limited to being linear or branched, and saturated or unsaturated, but from the viewpoint of cleansing ability (ability to remove makeup cosmetics), it is more preferably one or more selected from linear unsaturated, branched saturated, and branched unsaturated. When the fatty acid moiety of the polyglycerol fatty acid ester is unsaturated, the number of double bonds between carbon atoms is, for example, preferably 1 to 4, and more preferably 1.

[0017] The starting fatty acid for the polyglycerol fatty acid ester having such a fatty acid moiety is preferably at least one selected from myristic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid, and salts thereof, and more preferably at least one selected from stearic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid, and salts thereof. Alternatively, the starting fatty acid for the polyglycerol fatty acid ester having a fatty acid moiety may be at least one selected from a mixture of the above fatty acids, such as plant-derived fatty acids (coconut oil fatty acids, palm kernel oil fatty acids, palm oil fatty acids, sunflower seed oil fatty acids, olive fruit oil fatty acids, rapeseed oil fatty acids, macadamia nut oil fatty acids, etc.) and salts thereof.

[0018] The polyglycerin moiety of the polyglycerin fatty acid ester preferably has an average degree of polymerization of glycerin of 2 to 10, for example.

[0019] Component (B1) may contain, for example, a mixture of polyglycerol fatty acid esters with different ester addition numbers, but from the viewpoint of stability over time (appearance), the content of polyglycerol mono fatty acid esters (i.e., those with an ester addition number of 1) in component (B1) is, for example, preferably 40% by mass or less, more preferably 30% by mass or less, even more preferably 10% by mass or less, even more preferably 5% by mass or less, or may be 0% by mass.

[0020] Component (B1) is preferably, for example, a polyglycerol difatty acid ester (i.e., one with an ester addition number of 2), such as polyglyceryl-10 distearate, polyglyceryl-2 diisostearate, polyglyceryl-10 diisostearate, polyglyceryl-2 dioleate, polyglyceryl-10 dioleate, etc., and one or two species selected from polyglyceryl-2 diisostearate and polyglyceryl-10 dioleate are preferred.

[0021] Component (B2) is a polyoxyethylene glycerin fatty acid ester having a fatty acid moiety with a carbon number of 8 to 18 and an average number of moles of oxyethylene groups added of 15 to 20. The carbon number of the fatty acid moiety refers to the carbon number of the hydrocarbon group containing the carbon atom of the carboxyl group in the raw material fatty acid of the polyoxyethylene glycerin fatty acid ester.

[0022] The fatty acid moiety of the polyoxyethylene glycerin fatty acid ester preferably has, for example, 8 to 18 carbon atoms, more preferably 13 to 18 carbon atoms, and even more preferably 18 carbon atoms. The fatty acid moiety of the polyglycerin fatty acid ester may be linear or branched, and saturated or unsaturated, but is preferably, for example, a fatty acid moiety consisting of a saturated fatty acid or a salt thereof.

[0023] The starting fatty acid for the polyoxyethylene glycerin fatty acid ester having such a fatty acid moiety is preferably at least one selected from myristic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid, and salts thereof, and more preferably at least one selected from stearic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid, and salts thereof. Alternatively, the starting fatty acid for the polyoxyethylene glycerin fatty acid ester having a fatty acid moiety may be at least one selected from a mixture of the above-mentioned fatty acids, such as plant-derived fatty acids (coconut oil fatty acids, palm kernel oil fatty acids, palm oil fatty acids, sunflower seed oil fatty acids, olive fruit oil fatty acids, rapeseed oil fatty acids, macadamia nut oil fatty acids, etc.) and salts thereof.

[0024] The polyoxyethylene portion of the polyoxyethylene glycerin fatty acid ester preferably has an average added mole number of oxyethylene groups of, for example, 15 to 20, and at least one of 1 to 3 hydroxyl groups in glycerin is ether-bonded to polyethylene glycol.

[0025] Component (B2) may be, for example, a mixture of polyoxyethylene glycerin fatty acid esters with different ester addition numbers, but is preferably one or more selected from polyoxyethylene glycerin difatty acid esters (i.e., those with an ester addition number of 2) and polyoxyethylene glycerin trifatty acid esters (i.e., those with an ester addition number of 3). Examples include PEG-15 glyceryl diisostearate, PEG-20 glyceryl diisostearate, PEG-15 glyceryl triisostearate, and PEG-20 glyceryl triisostearate. Component (B2) is preferably one containing, for example, PEG-20 glyceryl triisostearate.

[0026] Furthermore, component (B2) may contain, for example, a polyoxyethylene glycerin mono-fatty acid ester (i.e., one having an ester addition number of 1) in addition to one or more selected from polyoxyethylene glycerin di-fatty acid esters and polyoxyethylene glycerin tri-fatty acid esters, and the content of polyoxyethylene glycerin mono-fatty acid ester in component (B2) is, for example, preferably 30% by mass or less, more preferably 20% by mass or less, even more preferably 10% by mass or less, even more preferably 5% by mass or less, or may be 0% by mass.

[0027] Examples of polyoxyethylene glycerin mono-fatty acid esters contained as component (B2) include PEG-15 glyceryl isostearate, PEG-20 glyceryl isostearate, PEG-15 glyceryl stearate, PEG-20 glyceryl stearate, and PEG-20 glyceryl oleate.

[0028] As component (B2), for example, PEG-20 glyceryl triisostearate is preferred, and a combination of PEG-20 glyceryl triisostearate and PEG-15 glyceryl stearate may also be used.

[0029] Component (B) used in the cleansing cosmetic of the present invention is preferably, for example, two or more selected from the group consisting of component (B1) and component (B2), and in one embodiment, may be two or more selected from component (B1), may be two or more selected from component (B2), or may be a combination of one or more selected from component (B1) and one or more selected from component (B2). Component (B) used in the cleansing cosmetic of the present invention is preferably, for example, two or more selected from component (B1), or a combination of one or more selected from component (B1) and one or more selected from component (B2).

[0030] When component (B) used in the cleansing cosmetic of the present invention is two or more selected from the above-mentioned component (B1), for example, two or more selected from polyglycerin difatty acid esters having a fatty acid moiety with 8 to 18 carbon atoms and an average degree of polymerization of glycerin of 2 to 10 are preferred, and a combination of polyglyceryl-10 dioleate and polyglyceryl-2 diisostearate is more preferred.

[0031] When the component (B) used in the cleansing cosmetic of the present invention is a combination of one or more selected from the above-mentioned component (B1) and one or more selected from the above-mentioned component (B2), for example, a combination of one or more selected from polyglycerin difatty acid esters having a fatty acid moiety with 8 to 18 carbon atoms and an average degree of polymerization of glycerin of 2 to 10 as the component (B1) and one or more selected from polyoxyethylene glycerin fatty acid esters having a fatty acid moiety with 8 to 18 carbon atoms and an average number of added moles of oxyethylene groups of 15 to 20 as the component (B2) is preferred, and for example, polyglyceryl-2 diisostearate and polyglyceryl dioleate are used as the component (B1). More preferred is a combination of one or more selected from polyglyceryl-10 diisostearate and one or more selected from PEG-20 glyceryl stearate as component (B2), and for example, it may be a combination of polyglyceryl-2 diisostearate as component (B1) and PEG-20 glyceryl triisostearate as component (B2), or it may be a combination of polyglyceryl-2 diisostearate and polyglyceryl-10 dioleate as component (B1), and PEG-20 glyceryl triisostearate and PEG-15 glyceryl stearate as component (B2).

[0032] When component (B) used in the cleansing cosmetic of the present invention is a combination of one or more components selected from the component (B1) and one or more components selected from the component (B2), for example, the mass ratio of the content of component (B1) to the content of component (B2) [(B2) / (B1)] is preferably 1.5 to 2.8, more preferably 1.6 to 2.5.

[0033] From the viewpoint of the preferences of cosmetic users, it is preferable that one or two of the ingredients of component (B) are plant-derived. From the viewpoint of the preferences of cosmetic users, commercially available products labeled as "plant-derived" may be used as component (B), such as polyglyceryl-2 diisostearate (plant-derived), polyglyceryl-10 dioleate (plant-derived), PEG-20 glyceryl triisostearate (plant-derived), and PEG-15 glyceryl stearate (plant-derived).

[0034] <Ingredient (C)> Component (C) used in the cleansing cosmetic of the present invention is a liquid ester oil, and is blended into the cleansing cosmetic of the present invention from the viewpoints of ease of use and cleansing properties.

[0035] In the present invention, the term "liquid" refers to a material having a viscosity at 25°C of 10,000 mPa·s or less, with ester oils of 1,000 mPa·s or less being more preferred, and ester oils of 800 mPa·s or less being even more preferred. The viscosity here may be calculated, for example, by measuring the kinematic viscosity, and is not particularly limited as long as it is a common method for measuring kinematic viscosity. However, suitable measurement methods include ISO 23581:2020 "Petroleum and related products - Determination of kinematic viscosity - Method using a Stabinger viscometer" and ISO 12185:1996 "Crude oil and petroleum products - Determination of density - Oscillating U-tube method."

[0036] Component (C) contains ethylhexyl hydroxystearate to improve stability over time. The content of ethylhexyl hydroxystearate in component (C) is, for example, preferably 18 to 50 mass %, more preferably 25 to 45 mass %.

[0037] Component (C) is a liquid ester oil other than ethylhexyl hydroxystearate, and examples thereof include ethylhexyl palmitate, caprylic / capric triglyceride, hexyl laurate, isocetyl myristate, and triethylhexanoin, with one or more selected from ethylhexyl palmitate and caprylic / capric triglyceride being preferred. From the perspective of the preferences of cosmetic users, it is preferred that these ester oils, including ethylhexyl hydroxystearate, have one or two of the fatty acids and fatty alcohols that make up the ester oil be plant-derived.

[0038] Furthermore, as component (C), these ester oils containing ethylhexyl hydroxystearate may be commercially available products labeled as "plant-derived" from the viewpoint of the preferences of cosmetic users. Examples include ethylhexyl hydroxystearate (plant-derived), caprylic / capric triglyceride (plant-derived), and ethylhexyl palmitate (plant-derived).

[0039] Furthermore, component (C) may be a liquid ester oil derived from a plant other than ethylhexyl hydroxystearate. Examples of plant-derived ester oils include linseed oil, camellia oil, macadamia nut oil, corn oil, olive oil, avocado oil, camellia oil, castor oil, sunflower oil, apricot kernel oil, cinnamon oil, jojoba oil, grape oil, sunflower oil, almond oil, rapeseed oil, sesame oil, wheat germ oil, rice germ oil, rice bran oil, cottonseed oil, soybean oil, peanut oil, tea seed oil, and evening primrose oil.

[0040] <Ingredient (D)> The cleansing cosmetic of the present invention may further use, as component (D), an ester compound that is in a paste form at 25°C, from the viewpoints of ease of use, cleansing properties, and stability. In the present invention, the term "paste-like" refers to an ester compound having a viscosity at 60°C of, for example, more than 30 mPa·s to 1,000 mPa·s, and preferably 100 to 500 mPa·s. The viscosity here is measured, for example, using a rheometer at 25°C and a shear rate of 10 (1 / s).

[0041] Examples of component (D) include one or more selected from hydrogenated castor oil isostearate, dipentaerythrityl hexahydroxystearate, dipentaerythrityl hexa(hydroxystearate / stearic acid / rosin acid), dipentaerythrityl tri-polyhydroxystearate, bis-diglyceryl polyacyladipate-2, phytosteryl macadamiate, phytosteryl / isostearyl / cetyl / stearyl / behenyl dimer dilinoleate, di(phytosteryl / octyldodecyl) lauroyl glutamate, di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate, and dimer dilinoleyl bis(behenyl / isostearyl / phytosteryl) dimer dilinoleate, and for example, bis-diglyceryl polyacyladipate-2 is preferred. From the viewpoint of the preferences of cosmetic users, it is preferable that one or two of the fatty acids and fatty alcohols constituting these paste-like ester compounds are derived from plants.

[0042] Furthermore, as component (D), the ester compound that is in a paste form at 25°C may be a commercially available product labeled as "plant-derived" from the perspective of the preferences of cosmetic users, and for example, bis-diglyceryl polyacyladipate-2 (plant-derived) is preferred.

[0043] <Composition, etc.> In the cleansing cosmetic of the present invention, the content of component (A) is, for example, preferably from 5 to 10% by mass, more preferably from 6 to 9% by mass.

[0044] In the cleansing cosmetic of the present invention, the content of component (B) is, for example, preferably from 40 to 50% by mass, more preferably from 45 to 48% by mass.

[0045] In the cleansing cosmetic of the present invention, the content of component (C) is, for example, preferably from 25 to 45% by mass, more preferably from 28 to 43% by mass.

[0046] When the cleansing cosmetic of the present invention further contains component (D), the content of component (D) is, for example, preferably from 2 to 10 mass %, more preferably from 4 to 10 mass %.

[0047] The cleansing cosmetic of the present invention comprises 100% by mass of the total of components (A), (B), (C), and, if necessary, component (D), as well as the remaining components including other cosmetic components described below.

[0048] In the cleansing cosmetic of the present invention, the mass ratio of the content of component (A) to the content of component (B) [(A) / (B)] is, for example, preferably in the range of 0.1 to 0.2, more preferably in the range of 0.12 to 0.18.

[0049] In the cleansing cosmetic of the present invention, the mass ratio of the content of component (A) to the content of component (C) [(A) / (C)] is, for example, preferably in the range of 0.2 to 0.4, more preferably in the range of 0.20 to 0.3.

[0050] <Other ingredients> The cosmetic of the present invention may contain the following cosmetic components as "other cosmetic components," which are cosmetic components other than the above-mentioned components (A), (B), (C), and (D). The "remaining components including other cosmetic components" are components that are not involved in the realization of the effects of the invention but are used to shape the cleansing cosmetic of the present invention or to realize the functions of the cosmetic (for example, the coloring effect of a colorant). Furthermore, from the perspective of the preferences of cosmetic users, the following cosmetic components may be commercially available products labeled as "plant-derived."

[0051] Antioxidants include d-δ tocopherol; preservative aids include pentylene glycol; solvents include squalane, ethanol, isopropanol, polyhydric alcohols, water-soluble polymers, bentonite, polyoxyethylene sorbitan monostearate, sorbitan sesquiisostearate, ethyl acetate, butyl acetate, butanol, etc.; thickeners, preservatives, emulsifiers, stabilizers, plasticizers; anionic surfactants, cationic surfactants, nonionic surfactants (excluding component (B)), zwitterionic surfactants, protein-based surfactants; medicinal ingredients include vitamin C dipalmitate, vitamins, amino acids, whitening agents, disinfectants; pH adjusters, potassium hydroxide, sodium hydroxide, triethanolamine, magnesium stearate, zinc stearate, sequestering agents, citric acid, sodium citrate, lactic acid, sodium lactate, UV absorbers, antioxidants, fragrances, preservatives, chelating agents, antioxidants, dispersants, browning inhibitors, buffers, precipitation inhibitors, organically modified clay minerals, and usability modifiers.

[0052] The cleansing cosmetic of the present invention preferably has a hardness of 80 to 500 g, more preferably 120 to 300 g, at 25° C., calculated by the measurement method described below. A cleansing cosmetic of the present invention having a hardness within this range is solid enough to maintain its shape but has a hardness that easily crumbles when pressed with a finger or the like, and provides good usability (no stickiness after rinsing) and ease of handling of the cleansing cosmetic (easy to pick up, easy to spread, etc.).

[0053] The hardness of the cleansing cosmetic of the present invention can be calculated, for example, by measuring the maximum stress (g) between the time when the measuring needle described below contacts the surface of the cosmetic and the time when it penetrates 5 mm under the following conditions. Measuring device: Rheotex: SD-700II (manufactured by Sun Scientific) Measurement conditions: 30°C Measurement speed: 60mm / min Measuring needle: 10mmφ

[0054] <Method for producing oil-based solid cleansing cosmetic> The method for producing the oil-based solid cleansing cosmetic of the present invention may be a method for producing a general oil-based cosmetic, such as a method in which component (A), component (B), component (C), optionally component (D), and other cosmetic ingredients are placed in a dissolving and stirring kettle and melt-mixed at 80 to 100°C to obtain the cleansing cosmetic mixture of the present invention, or a method in which component (A) is placed in a dissolving and stirring kettle and dissolved by heating at 80 to 100°C, and then component (B), component (C), optionally component (D), and other cosmetic ingredients are placed in the dissolved component (A) and melt-mixed to obtain the cleansing cosmetic mixture of the present invention. The method for producing the oil-based solid cleansing cosmetic of the present invention may further include a method in which the obtained mixture is degassed in a vacuum degassing kettle, filled into a jar or the like, and then cooled and solidified, thereby obtaining the cleansing cosmetic of the present invention.

[0055] In the method for producing the oil-based solid cleansing cosmetic of the present invention, the matters described for the oil-based solid cleansing cosmetic of the present invention may be applied as appropriate. The components used in the method for producing the oil-based solid cleansing cosmetic of the present invention are the same as those described for the oil-based solid cleansing cosmetic of the present invention. In the method for producing the oil-based solid cleansing cosmetic of the present invention, the "content" in the oil-based solid cleansing cosmetic of the present invention is read as "mixed amount," and the matters described for the oil-based solid cleansing cosmetic of the present invention are applied as appropriate. [Example]

[0056] [Ingredients used] <Component (A)> Beeswax: Product name: "Beeswax", manufactured by Miki Chemical Industry Co., Ltd. Sunflower seed wax: Product name: "Refined Sunflower Wax", manufactured by Yokoseki Oil & Fat Industries Co., Ltd. <Comparison component (A)> Microcrystalline wax: Product name: "Refined Microcrystalline Wax", manufactured by Nikko Rica Corporation

[0057] <Ingredient (B)> PEG-20 glyceryl triisostearate: Polyoxyethylene glycerin tri-fatty acid ester with isostearic acid as the fatty acid moiety and an average of 20 moles of oxyethylene groups added. Product name: Emalex GWIS-320EX (plant-derived), manufactured by Nippon Emulsion Co., Ltd. PEG-15 glyceryl stearate: Polyoxyethylene glycerin mono-fatty acid ester with stearic acid as the fatty acid moiety and an average of 15 moles of oxyethylene groups added, NIKKOL TMGS-15V (plant-derived), manufactured by Nikko Chemicals Co., Ltd. (Ingredient (B2)) Polyglyceryl-10 dioleate: Polyglycerin di-fatty acid ester with oleic acid as the fatty acid moiety and an average degree of polymerization of 10 for glycerin, product name "Salacos PG-218T" (plant-derived), manufactured by Nisshin Oillio Group Co., Ltd. Polyglyceryl-2 diisostearate: Polyglycerin di-fatty acid ester with isostearic acid as the fatty acid moiety and an average degree of polymerization of glycerin of 2, product name "Cosmol 42V" (plant-derived), manufactured by Nisshin Oillio Group, Ltd. Polyglyceryl-10 isostearate: Polyglycerol mono-fatty acid ester with an average degree of polymerization of 10, where the fatty acid moiety is isostearic acid, product name "NIKKOL Decaglyn 1-ISV" (plant-derived), manufactured by Nikko Chemicals Co., Ltd. Polyglyceryl-2 oleate: Polyglycerol mono-fatty acid ester with oleic acid as the fatty acid moiety and an average degree of polymerization of glycerin of 2, product name "NIKKOLDGMO-CV" (plant-derived), manufactured by Nippon Surfactant Industry Co., Ltd. Polyglyceryl-10 laurate: Polyglycerol mono-fatty acid ester with lauric acid as the fatty acid moiety and an average degree of polymerization of glycerin of 10, product name "SY Glystar ML-750" (plant-derived), manufactured by Sakamoto Pharmaceutical Co., Ltd. Polyglyceryl-3 caprylate: Polyglycerol mono-fatty acid ester with caprylic acid as the fatty acid moiety and an average degree of polymerization of glycerin of 3, product name "NIKKOLTriglyn 1-KF" (plant-derived), manufactured by Nikko Chemicals Co., Ltd. Polyglyceryl-3 laurate: Polyglycerol mono-fatty acid ester with lauric acid as the fatty acid moiety and an average degree of polymerization of glycerin of 3, product name "NIKKOLTriglyn 1-L" (plant-derived), manufactured by Nikko Chemicals Co., Ltd. (Ingredient (B1))

[0058] <Ingredient (C)> Ethylhexyl hydroxystearate: Viscosity 60 mPa·s (25°C) (Stabinger kinematic viscometer) Product name: Lithocasta IOHS (plant-derived), manufactured by Kokyu Alcohol Kogyo Co., Ltd. Ethylhexyl palmitate: Viscosity 15 mPa·s (25°C) (Stubinger kinematic viscometer), (plant-derived), product name "IOP", manufactured by Nikko Chemicals Co., Ltd. Castor oil: Viscosity 650 mPa·s (25°C) (Stubinger kinematic viscometer), derived from castor beans, product name "Castor Oil Special A" (plant-derived), manufactured by Ito Oil Mills, Ltd. Caprylic / capric triglyceride: Viscosity 24 mPa·s (25°C) (Stubinger kinematic viscometer), product name "NIKKOL Triester F-810" (plant-derived), manufactured by Nippon Surfactant Industry Co., Ltd. Dialkyl carbonate (C14,15): Viscosity 150 mPa·s (25°C) (Stubinger kinematic viscometer), product name "LIALCARB SR-1000 / R" (petroleum-derived), manufactured by Mitsui Fine Chemicals, Inc.

[0059] <Ingredient (D)> Bis-diglyceryl polyacyladipate-2: Viscosity 300 mPa·s (60°C) (Stabinger kinematic viscometer), product name "Softisan 649" (plant-derived, paste-like at 25°C), manufactured by IOI Oleo GmbH

[0060] <Other cosmetic ingredients> Squalane: Olive Squalane (plant-derived), manufactured by Kokyu Alcohol Kogyo Co., Ltd. Pentylene glycol: Product name: Hydrolite 5 Green (plant-derived), manufactured by Symrise Co., Ltd. Tocopherol: Product name: "Tocopherol 100" (plant-derived), manufactured by Nisshin Oillio Group Co., Ltd.

[0061] The water-in-oil solid emulsion cosmetics of the Examples and Comparative Examples were prepared by the following method: Components (A), (B), (C), and (D) shown in Table 1 were melt-kneaded at 80 to 100°C using a paddle mixer to obtain the oil-based solid cleansing cosmetics of the Examples and Comparative Examples.

[0062] The oil-based solid cleansing cosmetic preparations obtained in the Examples and Comparative Examples (hereinafter referred to as the cleansing cosmetic preparations of the present invention) were evaluated for the following items. The results are shown in Table 1.

[0063] <Makeup removal effect> A sensory evaluation was conducted by 10 female panelists. Lipstick was applied to the forearm, and 1.5 g of the cleansing cosmetic of the present invention was applied to the applied area, blended with the lipstick using the index finger and middle finger, and rinsed off with running water. The applied surface was visually observed, and the degree of lipstick removal was evaluated according to the following criteria. The evaluation result was determined to be the one that received the most positive feedback. The results are shown in Table 1.

[0064] ○: No lipstick stains remained. △: A slight lipstick stain remained. ×: Lipstick stains remained, or the lipstick and cleansing cosmetic did not blend well.

[0065] <Stickiness after rinsing> A sensory evaluation was conducted by 10 female panelists. Lipstick was applied to the forearm, and 1.5 g of the cleansing cosmetic of the present invention was applied to the applied area. The lipstick was blended with the index and middle fingers, and the cleansing cosmetic of the present invention was washed off by rubbing the applied surface with the index and middle fingers for 5 seconds under running water (tap water). The stickiness of the applied surface was evaluated according to the following criteria. The evaluation result was determined to be the result with the highest rating. The results are shown in Table 1.

[0066] ◯: No stickiness and no filmy feeling after washing. △: No stickiness, but some filmy feeling was felt after washing. ×: Stickiness remained and a filmy feeling was felt after washing.

[0067] <Ease of manufacturing cleansing cosmetics (foam removal)> 100 g of the cleansing cosmetic of the present invention was weighed into a 200 mL beaker and completely dissolved at 80 to 100°C. The beaker was then placed in a bell jar and the pressure was reduced using a vacuum pump (for 5 minutes). At this time, the air in the cosmetic foamed and rose, pushing up the liquid surface of the cosmetic. The bell jar was shaken (10 to 20 times) or similar to apply stress to the liquid surface, causing bubbles to break. The beaker was removed from the bell jar, and the state of the liquid surface was visually observed. The ease with which bubbles were removed by the above procedure was evaluated according to the following criteria. The evaluation result was determined to be the result with the highest rating. The results are shown in Table 1.

[0068] ○: The bubbles broke and the liquid level dropped without applying stress to the liquid surface, or no bubbles were observed on or in the liquid. △: The bubbles were broken and the liquid level dropped by shaking the suction bell (10 to 20 times), or no bubbles were observed on the liquid surface or in the liquid, or less than 5 bubbles were observed. ×: Even after shaking the suction bell (10 to 20 times), bubbles remained and the liquid level did not drop, or 5 or more bubbles were observed on the liquid surface.

[0069] <Stability of cleansing cosmetics over time (change in hardness)> The cleansing cosmetic composition of the present invention was filled into a jar container having a diameter of 30 mm and a height of 10 mm using a beaker. From the next day after filling, the container was placed in a thermostatic chamber for cycle testing, and the temperature inside the chamber was set to 0°C and left to stand for 12 hours. The temperature inside the chamber was then set to 40°C and left to stand for 12 hours. This cycle was repeated once a day for one month (approximately 30 cycles). After the test, the force (g) exerted when a probe having a diameter of 10 mm was inserted 5 mm into the center of the cleansing cosmetic composition of the present invention filled in the jar was taken as hardness, and the hardness was evaluated according to the following criteria.

[0070] ○: The decrease in hardness from the initial value was less than 20%. △: The decrease in hardness from the initial value was 20% or more and less than 40%. ×: The hardness decreased by 40% or more from the initial value.

[0071] <Stability of cleansing cosmetics over time (appearance)> The cleansing cosmetic of the present invention was filled into a jar container with a diameter of 30 mm and a height of 10 mm using a beaker. From the next day after filling, the container was placed in a thermostatic chamber for cycle testing, and the temperature inside the chamber was set to 0°C and left to stand for 12 hours. The temperature inside the chamber was then set to 40°C and left to stand for 12 hours. This cycle test was carried out over one month (approximately 30 cycles), with one cycle per day. The appearance of the cosmetic after the test was visually observed and evaluated according to the following criteria.

[0072] ○: No change was observed. △: Minor changes were observed (oil droplet marks, 5 to 10 tiny oil droplets (diameter 1 mm or less) were observed) ×: Obvious changes were observed (oozing of oil droplets onto the surface, deposition of wax crystals, partial melting of the surface, etc.)

[0073] [Table 1]

Claims

1. An oil-based solid cleansing cosmetic composition comprising (A) a natural wax (excluding those derived from petroleum) [component (A)], (B) one or more selected from polyglycerin fatty acid esters and polyoxyethylene glycerin fatty acid esters [component (B)], and (C) a liquid ester oil [component (C)], wherein component (C) contains ethylhexyl hydroxystearate.

2. 2. The oily solid cleansing cosmetic according to claim 1, wherein component (B) comprises one or more selected from the group consisting of the following (B1) and (B2): (B1) A polyglycerol fatty acid ester having a fatty acid moiety with 8 to 18 carbon atoms and an average degree of polymerization of glycerol of 2 to 10 (hereinafter referred to as component (B1)). (B2) Polyoxyethylene glycerin fatty acid ester having a fatty acid moiety with 8 to 18 carbon atoms and an average number of added moles of oxyethylene groups of 15 to 20 (Hereinafter referred to as component (B2))

3. 3. The oil-based solid cleansing cosmetic according to claim 2, wherein the content of polyglycerol monofatty acid ester in (B1) is 40% by mass or less.

4. 3. The oil-based solid cleansing cosmetic according to claim 1, wherein component (B) contains two or more selected from polyglyceryl-2 diisostearate, polyglyceryl-10 dioleate, and PEG-20 glyceryl triisostearate.

5. 3. The oil-based solid cleansing cosmetic according to claim 1, wherein the content of component (B) in the cleansing cosmetic is 40 to 50% by mass.

6. 3. The oil-based solid cleansing cosmetic according to claim 1, wherein the content of component (C) in the cleansing cosmetic is 25 to 45% by mass.

7. 3. The oil-based solid cleansing cosmetic according to claim 1, wherein the content of component (A) in the cleansing cosmetic is 5 to 10% by mass.

8. 3. The oil-based solid cleansing cosmetic composition according to claim 1, further comprising (D) an ester compound that is paste-like at 25°C (hereinafter referred to as component (D)).

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