Multi-layered solid cleansing cosmetic and method of use thereof

Abstract

To provide a novel solid cleansing cosmetic and a method for using the cosmetic.SOLUTION: A multilayer solid cleansing cosmetic including a first layer and a second layer has the following characteristics. The first layer consists of a first solid cleansing composition containing (1A) solid oil having the melting point from 40 to 120°C by 3 to 13 mass%, (1B) liquid oil by 10 to 80 mass%, (1C) nonionic surfactant by 10 to 30 mass%, and (1D) at least one kind selected from the group consisting of a keratin removal component, a keratotic plug removal component and a keratin softening component by 0.05 to 5 mass% in the total amount, the second layer consists of a second solid cleansing composition containing (2A) solid oil having the melting point from 40 to 120°C by 1 to 10 mass%, (2B) liquid oil by 10 to 86 mass%, (2C) nonionic surfactant by 5 to 20 mass%, and (2D) at least one kind selected from the group consisting of an anti-inflammatory component, an antioxidant component, a wrinkle improving component, a sagging improving component, a whitening component, a moisturizing component and a sterilization component by 0.01 to 1 mass% in the total amount, where the first layer and the second layer are used without being mixed.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a multi-layered solid cleansing cosmetic and a method for using the same. [Background technology]

[0002] Today, a variety of cleansing cosmetics are available on the market, taking into consideration consumer preferences, etc. For this reason, many consumers select and use a cleansing cosmetic from the various cleansing cosmetics available, depending on their preferences and the effects they expect.

[0003] Furthermore, various functional ingredients have been known, and different functional ingredients are used depending on the purpose. For example, Patent Document 1 reports a cosmetic composition for exfoliating skin containing polyhydroxy acid, an anti-inflammatory complex, and a natural moisturizing factor. It reports that this composition can restore the skin's barrier function through the exfoliating effect of the polyhydroxy acid, and that the combination of the natural moisturizing factor and the anti-inflammatory complex can alleviate the underlying skin nerve irritation that can be induced by exfoliation. Patent Document 1 also reports that polyhydroxy acid, which has exfoliating properties, is a component that can cause skin irritation, and that compositions containing polyhydroxy acid but not the anti-inflammatory complex and the natural moisturizing factor caused skin irritation, and that polyhydroxy acid content less than 3% by weight in the composition cannot fully exert its exfoliating effect. Patent Document 1 particularly describes that by blending 3% by weight or more (preferably 3 to 30% by weight) of polyhydroxy acid with the anti-inflammatory complex and the natural moisturizing factor, a composition with exfoliating effect and reduced skin irritation was obtained. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-21029 Summary of the Invention [Problem to be solved by the invention]

[0005] The present inventors have been conducting research into cleansing cosmetics for many years, and have an object to provide a new solid cleansing cosmetic and a method for using the same. [Means for solving the problem]

[0006] The present disclosure includes, for example, the following representative inventions. Item 1. A multi-layered solid cleansing cosmetic comprising a first layer and a second layer, having the following characteristics: the first layer comprises a first solid cleansing composition containing (1A) 3 to 13 mass% of a solid oil having a melting point of 40 to 120°C, (1B) 10 to 80 mass% of a liquid oil, (1C) 10 to 30 mass% of a nonionic surfactant, and (1D) a total amount of 0.05 to 5 mass% of at least one component selected from the group consisting of an exfoliating component, a keratin plug removing component, and a keratin softening component; the second layer comprises a second solid cleansing composition containing (2A) 1 to 10% by mass of a solid oil having a melting point of 40 to 120°C, (2B) 10 to 86% by mass of a liquid oil, (2C) 5 to 20% by mass of a nonionic surfactant, and (2D) a total amount of 0.01 to 1% by mass of at least one component selected from the group consisting of an anti-inflammatory component, an antioxidant component, a wrinkle-reducing component, a sagging-reducing component, a whitening component, a moisturizing component, and a bactericidal component; The first layer and the second layer are used without being mixed. Item 2. The multi-layered solid cleansing cosmetic according to Item 1, wherein component (1D) is at least one selected from the group consisting of organic acids, lactone derivatives of organic acids, clay minerals, inorganic oxides, inorganic salts, sulfur compounds, charcoal powder, plant extracts, fermented honey, enzymes, and nitrogenous compounds, and has at least one action selected from the group consisting of exfoliating, keratin plug removing, and keratin softening actions, and components (1C) and (2C) are the same or different and are at least one nonionic surfactant selected from the group consisting of polyglycerin fatty acid esters and polyoxyethylene fatty acid glyceryl. Item 3. The multi-layered solid cleansing cosmetic according to Item 1 or 2, wherein component (1D) is at least one selected from the group consisting of glycolic acid, lactic acid, malic acid, tartaric acid, citric acid, mandelic acid, salicylic acid, caproyl salicylic acid, lactobionic acid, gluconolactone, ribonolactone, talc, sericite, zeolite, kaolin, bentonite, saponite, hectorite, natural clay, sea mud, activated clay, volcanic soil, rhyolite powder, magnesium carbonate, hydroxyapatite, anhydrous silicic acid, magnesium sulfate, sodium chloride, sulfur, activated carbon, medicinal charcoal, bamboo charcoal, peat, broccoli extract, annatto seed extract, artichoke leaf extract, fermented rose honey, lipase, papain, and urea. Item 4. The multi-layered solid cleansing cosmetic according to any one of Items 1 to 3, wherein the anti-inflammatory ingredient described in component (2D) is at least one selected from the group consisting of glycyrrhizinic acid, glycyrrhetinic acid, derivatives thereof, salts thereof, licorice leaf extract, licorice root extract, nicotinamide, tranexamic acid, allatoin, and Centella asiatica extract. Item 5. The multi-layered solid cleansing cosmetic according to any one of Items 1 to 4, wherein the antioxidant component described in component (2D) is at least one selected from the group consisting of astaxanthin, vitamin E, vitamin C, fullerene, and resveratrol. Item 6. The multi-layered solid cleansing cosmetic according to any one of Items 1 to 5, wherein the wrinkle-reducing ingredient and / or sagging-reducing ingredient described in component (2D) is at least one selected from the group consisting of bakuchiol, vitamin A compounds, placenta, stem cell culture medium, peptides, vitamin E compounds, carbonic acid, and mannan. Item 7. The multi-layered solid cleansing cosmetic according to any one of Items 1 to 6, wherein the whitening ingredient described in component (2D) is at least one selected from the group consisting of tranexamic acid, its derivatives, salts thereof, arbutin, vitamin C, hydroquinone, placenta, kojic acid, linoleic acid, nicotinamide, vitamin A, phenylethylresorcinol, and ferulic acid. Item 8. The multi-layered solid cleansing cosmetic according to any one of Items 1 to 7, wherein the moisturizing component described in component (2D) is at least one selected from the group consisting of isomerized corn syrup, heparinoids, and ceramides. Item 9. The multi-layered solid cleansing cosmetic according to any one of Items 1 to 8, wherein the bactericidal component described in component (2D) is at least one selected from the group consisting of isopropyl phenol, salicylic acid, vitamin C, and vitamin B. Item 10. The multi-layered solid cleansing cosmetic according to any one of Items 1 to 9, wherein a first layer consisting of a 2- to 40-day dose of the first solid cleansing composition and a second layer consisting of a 2- to 40-day dose of the second solid cleansing composition are alternately arranged in two or more layers and stored in a container. Item 11. A method for using the multi-layered solid cleansing cosmetic composition according to any one of items 1 to 10, comprising: The multi-layered solid cleansing cosmetic is a cosmetic that is stored in a container in a state in which a first layer consisting of a first solid cleansing composition for a 2-40 day dose and a second layer consisting of a second solid cleansing composition for a 2-40 day dose are alternately arranged in two or more layers, (1) Use only the first layer for 2 to 40 days, then use only the second layer for 2 to 40 days, or (2) Use only the second layer for 2 to 40 days, then use only the first layer for 2 to 40 days. A method for using the multi-layered solid cleansing cosmetic. Item 12. In the step (1), the use of the second layer is started after the entire amount of the first layer has been used, or In the step (2), the use of the first layer is started after the entire amount of the second layer has been used. Item 12. A method for using the cleansing cosmetic composition according to item 11. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a multi-layered solid cleansing cosmetic composition that includes at least a first layer containing at least one component selected from the group consisting of an exfoliating component, a keratin plug removing component, and a keratin softening component, and a second layer containing at least one component selected from the group consisting of an anti-inflammatory component, an antioxidant component, a wrinkle-reducing component, a sagging-reducing component, a whitening component, a moisturizing component, and a bactericidal component, and that can be used without mixing the first layer and the second layer.

[0008] Furthermore, according to the present disclosure, it is possible to provide a multi-layered solid cleansing cosmetic composition that has at least a first layer containing at least one component selected from the group consisting of an exfoliating component, a keratin plug removing component, and a keratin softening component, and a second layer containing at least one component selected from the group consisting of an anti-inflammatory component, an antioxidant component, a wrinkle reducing component, a sagging reducing component, a whitening component, a moisturizing component, and a bactericidal component, and that is used without mixing the first layer and the second layer, and that has excellent exfoliating effect, keratin plug removing effect, and / or keratin softening effect, as well as excellent anti-inflammatory effect, antioxidant effect, wrinkle reducing effect, sagging reducing effect, whitening effect, moisturizing effect, and / or bactericidal effect.

[0009] Furthermore, according to the present disclosure, there can be provided a method of using the multi-layered solid cleansing cosmetic, which comprises (1) using only the first layer for 2 to 40 days and then using only the second layer for 2 to 40 days, or (2) using only the second layer for 2 to 40 days and then using only the first layer for 2 to 40 days. [Brief explanation of the drawings]

[0010] [Figure 1] An example of a multi-layered solid cleansing cosmetic composition according to the present disclosure is shown below. [Figure 2] An example of a multi-layered solid cleansing cosmetic composition according to the present disclosure is shown below. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present disclosure will be described in more detail. In this disclosure, the terms "contain" and "comprise" also mean "consist essentially of" and "consist of."

[0012] The present disclosure encompasses a multi-layered solid cleansing cosmetic composition comprising a first layer and a second layer, which has the following characteristics: the first layer comprises a first solid cleansing composition containing (1A) 3 to 13 mass% of a solid oil having a melting point of 40 to 120°C, (1B) 10 to 80 mass% of a liquid oil, (1C) 10 to 30 mass% of a nonionic surfactant, and (1D) a total amount of 0.05 to 5 mass% of at least one component selected from the group consisting of an exfoliating component, a keratin plug removing component, and a keratin softening component; the second layer comprises a second solid cleansing composition containing (2A) 1 to 10% by mass of a solid oil having a melting point of 40 to 120°C, (2B) 10 to 86% by mass of a liquid oil, (2C) 5 to 20% by mass of a nonionic surfactant, and (2D) an anti-inflammatory component, an antioxidant component, a wrinkle-reducing component, a sagging-reducing component, a whitening component, a moisturizing component, and a bactericidal component in a total amount of 0.01 to 1% by mass; The first layer and the second layer are used without being mixed.

[0013] First solid cleansing composition The multi-layered solid cleansing cosmetic of the present disclosure has a first layer consisting of a first solid cleansing composition. The first solid cleansing composition contains 3 to 13 mass% of (1A) a solid oil having a melting point of 40 to 120°C, 10 to 80 mass% of (1B) a liquid oil, 10 to 30 mass% of (1C) a nonionic surfactant, and a total amount of 0.05 to 5 mass% of (1D) at least one component selected from the group consisting of an exfoliating component, a keratin plug removing component, and a keratin softening component.

[0014] Ingredients (1A) (1A) Solid oils having a melting point of 40 to 120°C are known in the art and are not particularly limited, but examples of the melting point of component (1A) include preferably a melting point of 50 to 110°C, more preferably a melting point of 60 to 100°C, and particularly preferably a melting point of 70 to 90°C.

[0015] Examples of component (1A) include, but are not limited to, synthetic waxes such as homopolymers such as polyethylene wax, Fischer-Tropsch wax, and polypropylene wax, and copolymers such as (ethylene / propylene) copolymer wax; solid fats and oils such as Japan wax and hydrogenated castor oil; waxes such as carnauba wax, beeswax, candelilla wax, and jojoba wax; higher alcohols such as behenyl alcohol, cetanol, and batyl alcohol; silicone waxes, etc. More preferred examples of component (1A) are synthetic waxes, and more preferred examples include polyethylene wax and Fischer-Tropsch wax.

[0016] Component (1A) is known and commercially available. Examples of component (1A) include synthetic waxes such as Fischer-Tropsch waxes under the trade names TITANEL (manufactured by Nikko Rica Corporation), VB-8070 (manufactured by Nippon Wax Co., Ltd.), and SASOLWAX C80 (manufactured by SASOL), and polyethylene waxes under the trade names Micropoly 4039 (manufactured by Micro Powders) and PERFORMALENE 400 POLYETHYLENE (manufactured by Nikko Chemicals Co., Ltd.).

[0017] The component (1A) may be used alone or in combination of two or more.

[0018] The content of component (1A) in the first solid cleansing composition is 3 to 13% by mass. As long as the first solid cleansing composition remains solid, there are no lower or upper limits, and examples of the upper limit include preferably 4 to 12% by mass, more preferably 5 to 11% by mass, and even more preferably 5 to 10% by mass. Furthermore, while not limiting the present disclosure, examples of the upper limit within this range include 7%, 8%, and 9% by mass.

[0019] Ingredients (1B) (1B) Liquid oil means an oil that is liquid at room temperature (25°C). Component (1B) is known in the art and is not particularly limited, but examples include ester oil, hydrocarbon oil, animal and vegetable oil, silicone oil, higher alcohol, etc., and preferred examples are ester oil, hydrocarbon oil, and animal and vegetable oil. These may be used alone or in combination of two or more.

[0020] Examples of such liquid oils include, but are not limited to, ester oils such as ethylhexyl palmitate, caprylic / capric triglyceride, ethylhexyl isopalmitate, isopropyl palmitate, isopropyl myristate, cetyl ethylhexanoate, isotridecyl isononanoate, triethylhexanoin, pentaerythristyl tetraethylhexanoate, octyldodecyl myristate, diisostearyl malate, and bisethoxydiglycol cyclohexane-1,4-dicarboxylate; mineral oil, undecane, Examples include hydrocarbon oils such as dodecane, tridecane, liquid paraffin, liquid isoparaffin, squalane, α-olefin oligomer polybutene, and petrolatum; animal and vegetable oils such as olive oil, castor oil, avocado oil, safflower oil, soybean oil, camellia oil, corn oil, rapeseed oil, rice bran oil, palm oil, sunflower oil, cottonseed oil, and mink oil; silicone oils (chain silicone, cyclic silicone, modified silicone, etc.) such as dimethylpolysiloxane and dimethicone; and higher alcohols such as lauryl alcohol, oleyl alcohol, and isostearyl alcohol.

[0021] More preferred examples of component (1B) include ethylhexyl palmitate, caprylic / capric triglyceride, cetyl ethylhexanoate, dodecane, ethylhexyl isopalmitate, isopropyl palmitate, isopropyl myristate, isotridecyl isononanoate, triethylhexanoin, pentaerythristyl tetraethylhexanoate, and octyldodecyl myristate.

[0022] The component (1B) may be used alone or in combination of two or more.

[0023] The content of component (1B) in the first solid cleansing composition is 10 to 80% by mass. As long as the first solid cleansing composition remains solid, there are no upper or lower limits, and examples of the content include preferably 20 to 78% by mass, more preferably 30 to 75% by mass, and even more preferably 40 to 73.5% by mass. Furthermore, while not limiting the present disclosure, examples of lower limits within this range include 50% by mass, 55% by mass, and 58% by mass.

[0024] Ingredients (1C) (1C) The nonionic surfactant is a conventionally known surfactant and is not particularly limited, but preferred examples of nonionic surfactants include those with an HLB value of 4 to 14, more preferably 5 to 13, even more preferably 6 to 12, and particularly preferably 7 to 12. The HLB (Hydrophile Lypophile Balance) value is a known index for determining the balance between hydrophilicity and lipophilicity, and within an HLB value range of 0 to 20, a smaller HLB value indicates stronger lipophilicity, while a larger HLB value indicates stronger hydrophilicity. In the present disclosure, HLB usually follows the Griffin equation.

[0025] Although not limiting the present disclosure, examples of component (1C) include polyglycerin fatty acid esters, polyoxyethylene fatty acid glyceryl, sorbitan sesquioleate, etc., preferably polyglycerin fatty acid esters and polyoxyethylene fatty acid glyceryl, more preferably polyglycerin fatty acid esters.

[0026] Although not limiting the present disclosure, the polyglycerol fatty acid ester is preferably an ester of glycerol and a fatty acid having an average degree of polymerization (integer) of 2 or more. In the polyglycerol fatty acid ester, the average degree of polymerization of glycerol is preferably an integer of 2 to 10, and more preferably an integer of 4 to 10.

[0027] Although not limiting the present disclosure, the number of carbon atoms of the fatty acid constituting the polyglycerol fatty acid ester is preferably 10 to 18, more preferably 12 to 18. The fatty acid constituting the polyglycerol fatty acid ester may be linear or branched, and may be saturated or unsaturated. Examples of such fatty acids include lauric acid, myristic acid, palmitic acid, palmitoleic acid, oleic acid, vaccenic acid, linoleic acid, capric acid, stearic acid, isostearic acid, and linolenic acid. The fatty acids may be used alone or in any combination of two or more.

[0028] Although not limiting the present disclosure, more preferred examples of polyglycerol fatty acid esters include esters of glycerol having an average degree of polymerization of 2 or more and fatty acids having 10 to 18 carbon atoms, and even more preferred examples include esters of glycerol having an average degree of polymerization of 2 to 12 and fatty acids having 10 to 18 carbon atoms. Although not limiting the present disclosure, more preferred examples of polyglycerol fatty acid esters include polyglycerol mono-fatty acid esters, polyglycerol di-fatty acid esters, and the like.

[0029] Specific examples of polyglycerol fatty acid esters include, but are not limited to, polyglyceryl-10 dioleate, polyglyceryl-10 diisostearate, polyglyceryl-10 laurate, polyglyceryl-6 dicaprate, polyglyceryl-10 myristate, and polyglyceryl-2 oleate. In the present disclosure, the polyglycerol fatty acid esters may be used singly or in combination of two or more.

[0030] Furthermore, although not limiting the present disclosure, examples of the polyoxyethylene fatty acid glyceryl include fatty acids having preferably 8 to 22 carbon atoms, more preferably 10 to 20 carbon atoms, as fatty acids constituting the polyoxyethylene fatty acid glyceryl. The fatty acid may be a saturated fatty acid or an unsaturated fatty acid, and in the case of an unsaturated fatty acid, the number of double bonds between carbon atoms is not limited, and is, for example, 1 to 4, preferably 1 to 3, and more preferably 1 or 2. The fatty acid may be linear or branched.

[0031] Examples of fatty acids constituting polyoxyethylene fatty acid glyceryl include, but are not limited to, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid, behenic acid, etc., as well as natural fatty acids such as coconut oil fatty acid and palm oil fatty acid. These may be used alone or in combination of two or more.

[0032] Although not limiting the present disclosure, examples of polyoxyethylene constituting polyoxyethylene fatty acid glyceryl include those having an average number of moles of ethylene oxide (EO) added of preferably about 5 to 60, more preferably about 10 to 40, and more preferably about 15 to 25.

[0033] Although the present disclosure is not limited thereto, preferred examples of polyoxyethylene fatty acid glyceryl include polyoxyethylene glyceryl isostearate, polyoxyethylene glyceryl isoleate, polyoxyethylene glyceryl isolaurate, polyoxyethylene glyceryl diisolaurate, etc., each having the aforementioned average number of moles of ethylene oxide (EO) added, and more preferred examples include PEG-10 glyceryl triisostearate, PEG-20 glyceryl triisostearate, PEG-10 glyceryl isostearate, etc. In the present disclosure, the polyoxyethylene fatty acid glyceryl may be used alone or in combination of two or more.

[0034] The component (1C) may be used alone or in combination of two or more.

[0035] The content of component (1C) in the first solid cleansing composition is 10 to 30% by mass, with no upper or lower limit, provided that the first solid cleansing composition remains solid, and examples of the content include preferably 13 to 28% by mass, more preferably 15 to 25% by mass, and even more preferably 18 to 22% by mass.

[0036] Ingredients (1D) (1D) is at least one selected from the group consisting of exfoliating components, keratin plug removing components, and keratin softening components. These components are not particularly limited as long as they are pharmaceutically or cosmetically acceptable, and examples thereof include organic acids, lactone derivatives of organic acids, clay minerals, inorganic oxides, inorganic salts, sulfur compounds, charcoal powder, plant extracts, fermented honey, enzymes, nitrogen compounds, and the like, each of which has at least one effect selected from the group consisting of exfoliating, keratin plug removing, and keratin softening. Each of these components includes publicly known functional components that have been previously known to have exfoliating, keratin plug removing, and / or keratin softening effects. The presence or absence of exfoliating, keratin plug removing, and / or keratin softening effects can be determined by publicly known evaluation methods.

[0037] To explain an example of these components, although this disclosure is not limited thereto, examples of organic acids and lactone derivatives of organic acids include alpha hydroxy acids, beta hydroxy acids, polyhydroxy acids, and lactone derivatives of polyhydroxy acids.

[0038] Alpha hydroxy acids, also referred to as AHAs, are known in the art and include glycolic acid, lactic acid, malic acid, tartaric acid, citric acid, mandelic acid, and the like.

[0039] Beta hydroxy acids, also referred to as BHA, are known in the art and include salicylic acid, caproyl salicylic acid, and the like.

[0040] Polyhydroxy acids, also referred to as PHA, are known components in the art, and examples thereof include lactobionic acid and gluconic acid.

[0041] Examples of lactone derivatives of polyhydroxy acids include gluconolactone and ribonolactone.

[0042] Preferred examples of organic acids and lactone derivatives of organic acids include glycolic acid, lactic acid, malic acid, tartaric acid, citric acid, mandelic acid, salicylic acid, caproyl salicylic acid, lactobionic acid, gluconolactone, and ribonolactone.

[0043] Examples of clay minerals include talc, sericite, zeolite, kaolin, bentonite, saponite, hectorite, natural clay, sea mud, activated clay, volcanic clay, and rhyolite powder.

[0044] Clay minerals are well known. To give an example, sea mud is a natural inorganic substance derived from the ocean, known as a humic mud composed primarily of sulfur-containing aluminum silicate and containing various minerals. Mined sea mud can be used after drying, pulverization, or other processes, as needed. Examples of commercially available products include Mylonecton and Mylonecton R (both manufactured by Dai-Nippon Kasei Co., Ltd.), and Marine Silt FP (manufactured by Angkor-An Co., Ltd.). Another example of commercially available volcanic soil or rhyolite powder is Matera Powder (manufactured by Matera Co., Ltd.). Thus, clay minerals are commercially available.

[0045] Examples of inorganic oxides include silicic anhydride (silica) and magnesium oxide.

[0046] Examples of inorganic salts include magnesium carbonate, magnesium sulfate, hydroxyapatite, and sodium chloride.

[0047] Examples of sulfur compounds include sulfur (S).

[0048] Examples of charcoal powder include activated charcoal, medicinal charcoal, bamboo charcoal, and peat.

[0049] The particle size of the charcoal powder is not limited, and is exemplified by approximately 0.05 to 200 μm. Furthermore, the lower limit of the particle size is not limited, and preferred examples include 0.1 μm or more, 0.5 μm or more, 0.9 μm or more, 1 μm or more, 2 μm or more, and 5 μm or more. Furthermore, the upper limit of the particle size is not limited, and preferred examples include 150 μm or less, 120 μm or less, 100 μm or less, 80 μm or less, 60 μm or less, 40 μm or less, 20 μm or less, 10 μm or less, 5 μm or less, and 1 μm or less. Thus, the charcoal powder may preferably have any value within these ranges. The shape of the charcoal powder is also not limited. Furthermore, charcoal powders with different particle sizes may be used in combination. Note that the particle size values ​​in the present disclosure are based on the volume average particle size, and are values ​​measured by laser diffraction / scattering. More specifically, it is a value measured by wet particle size distribution measurement using a laser diffraction particle size distribution analyzer, and does not indicate the primary particle size.

[0050] Examples of plant extracts include broccoli extract, annatto seed extract, and artichoke leaf extract.

[0051] The method for producing a plant extract (extraction method) and the extraction conditions are not particularly limited, and may be any conventionally known method. For example, in the case of broccoli extract, broccoli extract is an extract made from broccoli as a raw material, and the extract can be obtained by drying, crushing, cutting, etc., the parts of broccoli to be used as is, as needed, and then squeezing or solvent extracting them. As the solvent extraction method, any method known in the art may be used, and for example, conventionally known extraction methods such as water (including warm water and hot water) extraction, alcohol extraction, and supercritical extraction can be used.

[0052] When solvent extraction is performed, examples of the solvent include water; alcohols (whether anhydrous or hydrous) such as monohydric alcohols having 1 to 5 carbon atoms (ethanol, methanol, propanol, isopropanol, etc.) and polyhydric alcohols having 2 to 5 carbon atoms (glycerin, isopropylene glycol, propylene glycol, 1,3-butylene glycol, etc.); ketones such as acetone, diethyl ether, dioxane, acetonitrile, ethyl acetate, etc., esters, xylene, benzene, chloroform, etc. The solvent temperature during extraction is not limited, but is preferably 40 to 100°C, and more preferably 60 to 100°C. These solvents may be used alone or in combination of two or more.

[0053] The extract obtained through solvent extraction in this manner can be called a "solvent extract." Furthermore, without limiting the present disclosure, for example, when water is used as the solvent, it can be called a "water extract," and when a lower alcohol is used, it can be called a "lower alcohol extract."

[0054] The obtained extract may be used as is, or may be dried and used in a solid form such as powder or granules. If necessary, the obtained extract may be purified, concentrated, or subjected to a separation process for a highly active fraction. While not limiting the scope of the present disclosure, examples of the purification process include filtration, adsorption using an ion exchange resin or an activated carbon column, and decolorization. Conventional methods such as an evaporator can be used for concentration. For separation of a highly active fraction, known separation processes such as gel filtration, adsorption, silica gel column chromatography, and HPLC (High Performance Liquid Chromatography) can be used.

[0055] The obtained extract (or its dried product, purified product, concentrated product, highly active fraction, etc.) may be powdered by a conventionally known method, such as freeze-drying or spray-drying, to provide the extract used in the present disclosure. The plant extract used in the present disclosure may be a commercially available product, or may be a commercially available product that has been further subjected to appropriate processing, such as drying.

[0056] The same explanation applies to annatto seed extract and artichoke leaf extract.

[0057] In this disclosure, the plant extract may be blended in any form, such as liquid, semi-solid, or solid, as long as it does not affect the solid form of the first solid cleansing composition. When a plant extract is used as component (1D), the content of the plant extract in the description below is a value calculated on a dry matter basis.

[0058] Examples of fermented honey include honey fermented products obtained by fermenting honey with fungi (fermentation fungi such as bacteria and yeast) such as acetic acid bacteria (e.g., acetic acid bacteria extracted from peach blossoms). Fermented honey products are commercially available, and examples of commercially available products include fermented rose honey (Katakura Co-op Agri Co., Ltd.). The fermented rose honey is a fermented honey product obtained by fermenting rose honey.

[0059] Examples of the enzyme include lipase and papain.

[0060] Examples of nitrogen compounds include urea.

[0061] Component (1D) may be blended in any form, such as liquid, semi-solid, or solid, as long as it does not affect the solid form of the first solid cleansing composition, and the content may be appropriately determined within the range described below depending on the type of component (1D). Furthermore, for example, when component (1D) is blended in solid form, its size is not limited, but its size is preferably exemplified by the same particle size as that described for the charcoal powder above. Furthermore, any commercially available product may be used as component (1D).

[0062] The component (1D) may be used either alone or in combination of two or more.

[0063] The content of component (1D) in the first solid cleansing composition is 0.05 to 5% by mass, with no upper or lower limit, provided that the first solid cleansing composition remains solid, and examples of the content include preferably 0.08 to 4.5% by mass, and more preferably 0.1 to 4% by mass.

[0064] The first solid cleansing composition may contain any other pharmaceutically or cosmetically acceptable ingredients, provided that the effects of the present disclosure are not impaired. Examples of other ingredients include various ingredients that can be used in common cleansing agents (including detergents). Examples of such ingredients include refreshing agents, fragrances, colorants, antioxidants, preservatives, thickeners, pH adjusters, animal extracts, vitamins, amino acids, blood circulation promoting ingredients, moisturizing ingredients, chelating agents, surfactants other than nonionic surfactants (e.g., cationic surfactants, anionic surfactants, amphoteric surfactants), and the like. These ingredients may be selected appropriately depending on the purpose, etc., and may be used alone or in combination of two or more, with the amounts of each ingredient appropriately determined.

[0065] The present disclosure is not limited to the first solid cleansing composition being in a solid form, but the first solid cleansing composition may contain, for example, water as another component. The water content in the composition is not limited, but is exemplified as 0 to 11% by mass, preferably 0.01 to 11% by mass, more preferably 0.1 to 11% by mass, and even more preferably 0.5 to 10% by mass. However, when the first solid cleansing composition contains water, it is preferable that the first solid cleansing composition remains in a solid form over the storage period or usage period and does not suffer from undesirable phenomena such as syneresis. For example, the cosmetics shown in the examples below are said to be free of such undesirable phenomena.

[0066] Without being limiting to the present disclosure, the first solid cleansing composition may contain other ingredients, such as a preservative (e.g., phenoxyethanol), to the extent that the shape and action of the first solid cleansing composition are not impaired. When a preservative is contained, the content of the preservative in the composition is not limited, but is preferably 0.01 to 0.5% by mass, more preferably 0.05 to 0.4% by mass, and even more preferably 0.1 to 0.3% by mass.

[0067] Without being limiting to the present disclosure, the first solid cleansing composition may contain other ingredients, such as an anti-inflammatory component, as long as the shape and action of the first solid cleansing composition are not impaired. The anti-inflammatory component is described below. When the first solid cleansing composition contains an anti-inflammatory component, the content of the anti-inflammatory component in the first solid cleansing composition is not limited, but is preferably less than 0.01% by mass. Furthermore, the first solid cleansing composition preferably does not contain an anti-inflammatory component.

[0068] Although not limiting the present disclosure, the first solid cleansing composition may contain other components, such as antioxidants, as long as the shape and action of the first solid cleansing composition are not impaired. The antioxidants are described below. When the first solid cleansing composition contains an antioxidant, the content of the antioxidant in the first solid cleansing composition is not limited, but is preferably less than 0.01% by mass. Furthermore, the first solid cleansing composition preferably does not contain an antioxidant.

[0069] Although not limiting the present disclosure, the first solid cleansing composition may contain, as other components, for example, a wrinkle-reducing component, as long as the shape and action of the first solid cleansing composition are not impaired. The wrinkle-reducing component will be described in the same manner as below. When a wrinkle-reducing component is contained, the content of the wrinkle-reducing component in the first solid cleansing composition is not limited, but is preferably less than 0.01% by mass in the composition. In addition, the first solid cleansing composition preferably does not contain a wrinkle-reducing component.

[0070] Without being limiting to the present disclosure, the first solid cleansing composition may contain, as other components, for example, a sagging-reducing component, as long as the shape and action of the first solid cleansing composition are not impaired. The sagging-reducing component will be described in the same manner as below. When the first solid cleansing composition contains a sagging-reducing component, the content of the sagging-reducing component in the first solid cleansing composition is not limited, but is preferably less than 0.01% by mass in the composition. In addition, the first solid cleansing composition preferably does not contain a sagging-reducing component.

[0071] Without limiting the present disclosure, the first solid cleansing composition may contain other ingredients, such as a whitening ingredient, as long as the shape and action of the first solid cleansing composition are not impaired. The whitening ingredient is described below. When the first solid cleansing composition contains a whitening ingredient, the content of the antioxidant ingredient in the first solid cleansing composition is not limited, but is preferably less than 0.01% by mass. Furthermore, the first solid cleansing composition preferably does not contain a whitening ingredient.

[0072] Without being limiting to the present disclosure, the first solid cleansing composition may contain, as other components, for example, a moisturizing component, as long as the shape and action of the first solid cleansing composition are not impaired. The moisturizing component will be described in the same manner as below. When a moisturizing component is contained, the content of the moisturizing component in the first solid cleansing composition is not limited, but is preferably less than 0.01% by mass in the composition. In addition, the first solid cleansing composition preferably does not contain a moisturizing component.

[0073] Although not limiting the present disclosure, the first solid cleansing composition may contain, as other components, for example, a bactericidal component, as long as the shape and action of the first solid cleansing composition are not impaired. The bactericidal component will be described in the same manner as below. When the first solid cleansing composition contains a bactericidal component, the content of the bactericidal component in the first solid cleansing composition is not limited, but is preferably less than 0.01% by mass in the composition. In addition, the first solid cleansing composition preferably does not contain a bactericidal component.

[0074] The first solid cleansing composition can be produced by a method conventionally known in the art by mixing the components (1A) to (1D) in the amounts specified above, and optionally adding other components, and solidifying the mixture. The first solid cleansing composition is solid; that is, it has no fluidity at normal pressure (1 atmosphere) and 25°C. Although not limited thereto, the composition more preferably has no fluidity at normal pressure and 35°C. Here, "having no fluidity" means that, as in the examples described below, 45 g of a mixture of the components constituting the composition in a molten state is filled into a container (e.g., a cylindrical container with an inner diameter of 6 cm, made of polypropylene resin), and then allowed to cool and solidify at room temperature (25°C) for 8 hours. When the container containing the solidified composition is tilted at an angle of 15 degrees from a state placed on a flat plate, no change in shape of the composition is visually observed at normal pressure and the temperature within 3 hours.

[0075] The first solid cleansing composition preferably also has a certain hardness. Specifically, the hardness is such that when a second layer made of a second solid cleansing composition is laminated on a first layer made of the first solid cleansing composition, the second layer does not become recessed or embedded in the first layer, and similarly, when the first layer is laminated on the second layer, the first layer does not become recessed or embedded in the second layer. Examples of such hardness include 150 or more. Examples of preferred hardness are 200 to 600. In the present disclosure, hardness is measured using a rheometer (FUDOH Rheometer RTC-3002D, manufactured by LEOC Corporation) with a flat 10φ (diameter) adapter at a table speed of 30 cm / min, a penetration depth of 5 mm, a range of 2k, and a measurement temperature of 25°C (rheometer hardness).

[0076] The contents of components (1A) to (1D) in the first solid cleansing composition are not limited as described above, but the total amount of components (1A) to (1D) in the composition is preferably 60% by mass or more, more preferably 75 to 100% by mass, even more preferably 80 to 99.8% by mass, and particularly preferably 85 to 99.5% by mass.

[0077] Second solid cleansing composition The multi-layered solid cleansing cosmetic of the present disclosure has a second layer made of a second solid cleansing composition. The second solid cleansing composition contains (2A) 1 to 10% by mass of a solid oil having a melting point of 40 to 120°C, (2B) 10 to 86% by mass of a liquid oil, (2C) 5 to 20% by mass of a nonionic surfactant, and (2D) a total of 0.01 to 1% by mass of at least one component selected from the group consisting of an anti-inflammatory component, an antioxidant component, an anti-wrinkle component, an anti-sagging component, a whitening component, a moisturizing component, and an antibacterial component.

[0078] Ingredients (2A) (2A) Solid oil having a melting point of 40 to 120° C. is explained in the same manner as the above component (1A). Component (2A) may be used alone or in combination of two or more types.

[0079] The content of component (2A) in the second solid cleansing composition is 1 to 10% by mass. As long as the second solid cleansing composition remains solid, there are no upper or lower limits, and examples of the upper limit include preferably 2 to 9% by mass, and more preferably 3 to 8% by mass. Furthermore, while not limiting the present disclosure, examples of the upper limit within this range include 5%, 6%, and 7% by mass.

[0080] Ingredients (2B) The liquid oil (2B) can be explained in the same manner as the component (1B) above. The component (2B) may be used alone or in combination of two or more.

[0081] The content of component (2B) in the second solid cleansing composition is 10 to 86% by mass. As long as the second solid cleansing composition remains solid, there are no upper or lower limits, and examples of the upper or lower limits include preferably 20 to 86% by mass, and more preferably 30 to 86% by mass. Furthermore, while not limiting the present disclosure, examples of the lower limit within this range include 40% by mass, 50% by mass, 60% by mass, 70% by mass, 75% by mass, and 80% by mass.

[0082] Ingredients (2C) The nonionic surfactant (2C) is explained in the same manner as the component (1C). Although not limited thereto, preferred examples of component (2C) include polyoxyethylene fatty acid glyceryl and polyoxyethylene fatty acid glyceryl, and more preferred examples include polyoxyethylene fatty acid glyceryl. Component (2C) may be used alone or in combination of two or more.

[0083] The content of component (2C) in the second solid cleansing composition is 5 to 20% by mass. As long as the second solid cleansing composition remains solid, there are no upper or lower limits, and examples of the upper limit include preferably 8 to 18% by mass, and more preferably 9 to 15% by mass. Furthermore, while not limiting the present disclosure, examples of upper limits within this range include 11%, 12%, and 13% by mass.

[0084] Ingredients (2D) (2D) is at least one selected from the group consisting of anti-inflammatory ingredients, antioxidant ingredients, wrinkle-reducing ingredients, sagging-reducing ingredients, whitening ingredients, moisturizing ingredients, and antiseptic ingredients.

[0085] These ingredients are not particularly limited as long as they are pharmaceutically or cosmetically acceptable, but examples of anti-inflammatory ingredients include glycyrrhizinic acid, glycyrrhetinic acid, derivatives thereof, and salts thereof; licorice extract; nicotinamide; tranexamic acid, derivatives thereof, and salts thereof; allatoin; Centella asiatica extract, etc. These may be used alone or in combination of two or more.

[0086] To explain an example of an anti-inflammatory component, although this disclosure is not limited thereto, examples of glycyrrhizinic acid and its derivatives include glycyrrhizinic acid, methyl glycyrrhizinate, stearyl glycyrrhizinate, etc. Examples of glycyrrhizinic acid and its derivatives include glycyrrhizinic acid, pyridoxine glycyrrhetinate, stearyl glycyrrhetinate, glyceryl glycyrrhetinate, glycyrrhetinic acid monoglucuronide, etc. Examples of salts of glycyrrhizinic acid, glycyrrhetinic acid, and their derivatives are not limited as long as they are pharmaceutically or cosmetically acceptable salts, and include, for example, alkali metal salts such as sodium salts and potassium salts; ammonium salts, etc. Thus, the derivatives or salts are not particularly limited, but preferred examples include stearyl glycyrrhizinate, dipotassium glycyrrhizinate, etc.

[0087] Licorice extract is an extract made from licorice (e.g., Glycyrrhiza glabra, Glycyrrhiza uralensis), a perennial plant of the legume family. The extract can be obtained by drying, crushing, cutting, or the like, as needed, the parts of licorice to be used (e.g., leaves, roots, stems, flowers, the entire plant, etc.), followed by squeezing or solvent extraction. Solvent extraction methods may be employed using methods known in the art, and are described above. The solvents used, solvent temperatures, and the like are also described above. The obtained extract may be used as is, or may be dried and used in a solid form such as powder or granules. If necessary, the obtained extract may be subjected to a purification process or a powdering process, as described above. Preferred examples of licorice extract include licorice leaf extract made from the leaves and licorice root extract made from the roots.

[0088] Regarding component (2D), the extract may be formulated in any form, such as liquid, semi-solid, or solid, as long as it does not affect the shape of the second solid cleansing composition. However, when an extract is used as component (2D), the content of the extract in the following explanation is a value calculated on a dry matter basis.

[0089] Nicotinamide is an amide of nicotinic acid and is a conventionally known ingredient also known as niacinamide.

[0090] Tranexamic acid, its derivatives, and salts thereof are known as anti-inflammatory ingredients. Tranexamic acid derivatives are not particularly limited as long as they are pharmaceutically or cosmetically acceptable, and examples thereof include tranexamic acid dimer, tranexamic acid ester, tranexamic acid phenyl ester, tranexamic acid vitamin ester, and tranexamic acid alkylamide. Examples of tranexamic acid esters include alkyl esters having 1 to 30 carbon atoms, and phenyl esters optionally substituted with alkyl groups having 1 to 30 carbon atoms, halogen atoms, or carboxyl groups. Examples of tranexamic acid alkylamides include tranexamic acid methylamide and tranexamic acid ethylamide. Salts of tranexamic acid and its derivatives are not particularly limited as long as they are pharmaceutically or cosmetically acceptable salts, and examples thereof include inorganic acid salts such as hydrochloride, nitrate, and sulfate; organic acid salts such as acetate, lactate, maleate, fumarate, tartrate, citrate, and methanesulfonate; organic amine salts such as monoethanolamine salt, diethanolamine salt, and triethanolamine salt; ammonium salt; alkali metal salts such as sodium salt and potassium salt; and alkaline earth metal salts such as magnesium salt.

[0091] Allatoin is a known compound with the chemical formula C4H6N4O3.

[0092] Centella asiatica extract is an extract made from Centella asiatica (a plant of the Apiaceae family), and the extract can be obtained by drying, crushing, cutting, or the like, as needed, the parts of Centella asiatica to be used (leaves, roots, stems, flowers, the whole plant, etc.), and then squeezing or solvent extracting them. The solvent extraction method, the solvent used, and other extractive elements are the same as those described above. A preferred example of the Centella asiatica extract is one made from the leaves and / or stems.

[0093] The antioxidant component is not particularly limited as long as it is pharmaceutically or cosmetically acceptable, but examples include astaxanthin, vitamin E, vitamin C, fullerene, resveratrol, etc. These may be used alone or in combination of two or more.

[0094] Astaxanthin is a conventionally known component. The origin of astaxanthin is not limited, and it may be naturally derived from fish (salmon, trout, etc.), crustaceans (krill, etc.), algae (Haematococcus algae, etc.), plants (Adonis, etc.), microorganisms such as yeast, or it may be synthetically produced. Astaxanthin has the IUPAC name 3,3'-dihydroxy-β,β-carotene-4,4'-dione (chemical formula C 40 H 52 O4), and is known to exist as three optical isomers, the (3R,3R') isomer, the (3S,3R') isomer (meso isomer), and the (3S,3S') isomer, depending on the positions of the hydroxy groups at the 3- and 3'-positions. Furthermore, it is also known to exist as geometric isomers depending on the cis- or trans-position of the conjugated double bond at the center of the molecule. Furthermore, monoesters, diesters, and the like of these are also conventionally known as astaxanthin. Any of these astaxanthins can be used in the present disclosure.

[0095] Vitamin E compounds are not limited as long as they are pharmaceutically or cosmetically acceptable, and include tocopherol, tocotrienol, tocopherol acetate, tocopherol succinate, tocopherol nicotinate, tocopherol linolenate, tocopherol linoleate, and tocopherol (linoleate / oleate) and other organic acid esters of tocopherol. These may be α-, β-, γ-, or δ-tocopherols, and may be either d- or dl-tocopherols. d-α-tocopherol acetate is also known as natural vitamin E.

[0096] Examples of vitamin C include, but are not limited to, as long as they are pharmaceutically or cosmetically acceptable, ascorbic acid, salts of ascorbic acid (alkali metal salts such as sodium salt and potassium salt, alkaline earth metal salts such as calcium salt and magnesium salt, etc.), phosphate esters of ascorbic acid and salts thereof (sodium ascorbyl phosphate, magnesium ascorbyl phosphate, etc.), fatty acid esters of ascorbic acid and salts thereof (ascorbyl dipalmitate, ascorbyl tetraisopalmitate, ascorbyl tetrahexyldecanoate, trisodium ascorbyl palmitate phosphate, etc.), ascorbic acid sulfate esters and salts thereof, etc.

[0097] Fullerene is a general term for spherical shell-shaped molecules composed of carbon atoms, and has been known as a component having antioxidant activity. The fullerene used in the present disclosure is not limited, and examples thereof include, depending on the number of carbon atoms (C), C32 fullerene, C44 fullerene, C50 fullerene, C58 fullerene, C60 fullerene, C70 fullerene, C76 fullerene, C78 fullerene, C84 fullerene, C90 fullerene, and C96 fullerene.

[0098] Resveratrol is known as a component having antioxidant activity. Resveratrol is known in trans and cis forms, and in the present disclosure, the trans form is preferably exemplified as resveratrol.

[0099] Furthermore, the wrinkle-reducing component and / or sagging-reducing component is not particularly limited as long as it is pharmaceutically or cosmetically acceptable, and examples include bakuchiol, vitamin A, placenta, stem cell culture medium (stem cell culture supernatant), peptides, vitamin E, carbonic acid, mannan, etc. These may be used alone or in combination of two or more.

[0100] Bakuchiol is a known compound known by the CAS number 10309-37-2.

[0101] Examples of vitamin A include, but are not limited to, retinol, retinol palmitate, retinol acetate, retinol propionate, retinol octylate, retinol laurate, retinol linoleate, and other organic acid esters of retinol; retinal; retinoic acid; methyl retinoate; ethyl retinoate; retinol retinoate; d-δ-tocopheryl retinoate; α-tocopheryl retinoate; β-tocopheryl retinoate; 3-dehydroretinol; 3-dehydroretinal; and 3-dehydroretinoic acid. Preferred examples of vitamin A include retinol, retinol palmitate, and retinol acetate. Vitamin A may be contained in vitamin A oil, and conventionally known vitamin A oils can be used.

[0102] Placenta is a water-soluble extract obtained from the placenta of animals (pig, horse, cow, sheep, human, etc.) and contains amino acids, peptides, and / or nucleic acid bases. Placenta is also called placenta extract, and its extraction method is conventionally known. In the present disclosure, placenta is not limited as long as it is pharmaceutically or cosmetically acceptable, and commercially available products may be used.

[0103] Stem cell culture media are conventionally known and are not limited as long as they are pharmaceutically or cosmetically acceptable. Stem cell culture media are commercially available, and commercially available products may be used, such as RS Liposome 1.0 (REMYBIO), Lipo-Stem-Cell (Cellinbio), and umbilical blood stem cell culture medium (Horus Co., Ltd.).

[0104] The peptides are not limited as long as they are pharmaceutically or cosmetically acceptable, and examples thereof include acetyl tetrapeptide-2, oligopeptide-1, diacetic acid dipeptide diaminobutyroyl benzylamide, palmitoyl tripeptide-5, and the like.

[0105] The vitamin E group is described in the same manner as above.

[0106] There are no limitations on the carbonic acid, so long as it is pharmaceutically or cosmetically acceptable, and examples thereof include sodium carbonate and sodium bicarbonate.

[0107] There are no limitations on the mannans as long as they are pharmaceutically or cosmetically acceptable, and examples thereof include glucomannan.

[0108] Furthermore, the whitening ingredient is not particularly limited as long as it is pharmaceutically or cosmetically acceptable, but examples include tranexamic acid, its derivatives, salts thereof, arbutin, vitamin C, hydroquinone, placenta, kojic acid, linoleic acid, nicotinamide, vitamin A, phenylethylresorcinol, ferulic acid, etc. These may be used alone or in combination of two or more.

[0109] Tranexamic acid, its derivatives and salts thereof are explained in the same manner as above.

[0110] Arbutin is a conventionally known component and is known as a natural phenolic glycoside.

[0111] Vitamin C is described in the same manner as above.

[0112] Hydroquinone is a known ingredient and is conventionally used in the art.

[0113] The placenta is described in the same manner as above.

[0114] Kojic acid is a compound discovered in koji and is a conventionally known component.

[0115] Linoleic acid is a conventionally known fatty acid.

[0116] Nicotinamide is explained in the same manner as above.

[0117] Vitamin A is explained in the same manner as above.

[0118] Phenylethyi resorcinol is a previously known compound known by the IUPAC name 4-(1-phenylethyl)-1,3-benzenediol.

[0119] Ferulic acid is a known component that is known as an organic compound present in the cell walls of plants.

[0120] The moisturizing component is not particularly limited as long as it is pharmaceutically or cosmetically acceptable, but examples include isomerized corn syrup, heparinoids, ceramides, etc. These may be used alone or in combination of two or more.

[0121] High fructose corn syrup is a complex carbohydrate produced by base-catalyzed rearrangement of a mixture of sugars and is a well-known component.

[0122] Heparinoids are conventionally known components and are polysulfated mucopolysaccharides such as chondroitin polysulfate, regardless of their origin, such as those obtained by sulfating mucopolysaccharides, or those obtained by extraction and purification from animals such as cows or pigs (for example, lungs containing porcine tracheal cartilage). Commercially available heparinoids may be used, and preferred examples include heparinoids listed in the Japanese Pharmacopoeia Non-Drug Standards.

[0123] Ceramide is a type of sphingolipid, and examples thereof include ceramide EOP, ceramide NG, ceramide NP, ceramide AP, and ceramide AG, all of which are known.

[0124] The antiseptic component is not particularly limited as long as it is pharmaceutically or cosmetically acceptable, but examples include isopropyl phenol, salicylic acid, vitamin C, vitamin B, etc. These may be used alone or in combination of two or more.

[0125] Isopropylmethylphenol is a known ingredient known by the cosmetic label name o-cymen-5-ol.

[0126] Salicylic acid is a known ingredient that has been used conventionally in quasi-drugs and the like.

[0127] Vitamin C is described in the same manner as above.

[0128] B vitamins are well known and examples thereof include vitamin B1, vitamin B2, vitamin B3, vitamin B5, vitamin B6, vitamin B7, vitamin B9, and vitamin B12.

[0129] Vitamin B1 includes thiamine, its derivatives, and salts thereof. Specific examples of vitamin B1 include thiamine, bisthiamine, thiamine disulfide, dicethiamine, fursultiamine, octotiamine, sicotiamine, bis-ibutiamine, bis-bentiamine, prosultiamine, benfotiamine, and salts thereof. Salts of thiamine and its derivatives are not limited as long as they are pharmaceutically or cosmetically acceptable, and examples thereof include hydrochloride, nitrate, cetyl sulfate, etc. Vitamin B1 may also be in the form of a solvate, and the solvent is not limited as long as it is pharmaceutically or cosmetically acceptable, and examples thereof include water, etc.

[0130] Vitamin B2 includes riboflavin, riboflavin derivatives, and salts thereof. Specific examples of vitamin B2 include riboflavin, riboflavin esters such as riboflavin phosphate, riboflavin acetate, and riboflavin butyrate, and flavin adenine dinucleotide sodium, as well as salts thereof. Salts of riboflavin and riboflavin derivatives are not limited as long as they are pharmaceutically or cosmetically acceptable, and examples include alkali metal salts such as sodium salts and potassium salts (e.g., riboflavin sodium phosphate).

[0131] Vitamin B3 includes niacin, niacin derivatives, and salts thereof, and specific examples of vitamin B3 include niacin and nicotinamide.

[0132] Vitamin B5 includes pantothenic acid, pantothenic acid derivatives, and salts thereof, specifically, pantothenic acid, panthenol, panthenylethyl, etc.

[0133] Vitamin B6 compounds include pyridoxine, pyridoxal, pyridoxamine, their derivatives, and their salts, such as pyridoxine dicaprylate, pyridoxine HCl (pyridoxine hydrochloride), and pyridoxal phosphate.

[0134] Examples of vitamin B7 include biotin.

[0135] Examples of vitamin B9 include folic acid.

[0136] Vitamin B12 compounds include cobalamin, its derivatives, and salts thereof. Specific examples of vitamin B12 compounds include cobalamin, cobalamin with a cobalt ion substitution, and derivatives thereof, such as methylcobalamin, cyanocobalamin, hydroxocobalamin, sulfitocobalamin, and adenosylcobalamin. Salts of cobalamin and its derivatives are not limited as long as they are pharmaceutically or cosmetically acceptable, and include alkali metal salts such as sodium salt and potassium salt; alkaline earth metal salts such as calcium salt and magnesium salt; inorganic acid salts such as phosphate, sulfate, nitrate, and hydrobromide; organic acid salts such as acetate, propionate, tartrate, fumarate, maleate, malate, citrate, methanesulfonate, and paratoluenesulfonate; and amino acid salts such as aspartate and glutamate. Vitamin B12 may be in the form of a solvate, and the solvent is not limited as long as it is pharmaceutically or cosmetically acceptable, and examples thereof include water, ethanol, glycerol, acetic acid, etc.

[0137] Component (2D) may also be formulated in any form, such as liquid, semi-solid, or solid, as long as it does not affect the shape of the second solid cleansing composition, and the amount may be appropriately determined within the range of the content described below depending on the type of component (2D). Furthermore, for example, when component (2D) is formulated in solid form, its size is not limited, but its size is preferably the same as that described for the charcoal powder. Furthermore, any commercially available product may be used as component (2D).

[0138] The component (2D) may be used either alone or in combination of two or more.

[0139] The content of component (2D) in the second solid cleansing composition is 0.01 to 1% by mass, and there are no upper or lower limits within this range, as long as the second solid cleansing composition remains solid, with preferred examples including 0.01 to 0.8% by mass.

[0140] The second solid cleansing composition may contain any other pharmaceutically or cosmetically acceptable ingredients, provided that the effects of the present disclosure are not impaired. Examples of other ingredients include various ingredients commonly used in cleansing agents (including detergents). Examples of such ingredients include fresheners, fragrances, colorants, antioxidants, preservatives, thickeners, pH adjusters, enzymes, extracts such as animal extracts and plant extracts (extracts other than those listed as component (2D)), vitamins (vitamins other than vitamins A, B, C, and E), amino acids, blood circulation-promoting ingredients, chelating agents, surfactants other than nonionic surfactants (e.g., cationic surfactants, anionic surfactants, amphoteric surfactants), and the like. These ingredients may be selected appropriately depending on the intended purpose, and may be used alone or in combination of two or more, with the amounts of each ingredient appropriately determined.

[0141] Without limiting the present disclosure, the second solid cleansing composition may contain, for example, water as another ingredient, as long as it remains solid. The water content in the composition is not limited, but is preferably 0 to 5% by mass, and more preferably 0 to 2% by mass. However, when water is contained in the second solid cleansing composition, it is preferable that the second solid cleansing composition remains solid over the storage or usage period and that undesirable phenomena such as syneresis do not occur. More preferably, the second solid cleansing composition does not contain water.

[0142] While not limiting the present disclosure, the second solid cleansing composition may contain other ingredients, such as a preservative (e.g., phenoxyethanol), to the extent that the shape and action of the second solid cleansing composition are not impaired. The content of the preservative in the composition is not limited, but is preferably 0 to 0.5% by mass, more preferably 0.01 to 0.4% by mass, and even more preferably 0.1 to 0.3% by mass.

[0143] Although not limiting the present disclosure, the second solid cleansing composition may contain other ingredients, such as an exfoliating component, as long as the composition's shape and action are not impaired. The exfoliating component is as described above. When the second solid cleansing composition contains an exfoliating component, the content of the exfoliating component in the second solid cleansing composition is not limited, but is preferably less than 0.05% by mass. Furthermore, the second solid cleansing composition preferably does not contain an exfoliating component.

[0144] Although not limiting the present disclosure, the second solid cleansing composition may contain, as other components, for example, a keratin plug removing component, as long as it does not interfere with its shape and action.The keratin plug removing component is explained in the same manner as above.When it contains a keratin plug removing component, the content of the keratin plug removing component in the second solid cleansing composition is not limited, but is preferably less than 0.05% by mass in the composition.In addition, the second solid cleansing composition preferably does not contain a keratin plug removing component.

[0145] Without limiting the present disclosure, the second solid cleansing composition may contain other ingredients, such as a keratin softening component, as long as the shape and action of the second solid cleansing composition are not impaired. The exfoliating component is as described above. When a keratin softening component is contained, the content of the keratin softening component in the second solid cleansing composition is not limited, but is preferably less than 0.05% by mass of the composition. Furthermore, the second solid cleansing composition preferably does not contain a keratin softening component.

[0146] In the present disclosure, the composition of the second solid cleansing composition is different from the composition of the first solid cleansing composition.

[0147] The second solid cleansing composition can be produced by a method conventionally known in the art by mixing the components (2A) to (2D) in the amounts described above, and optionally other components, and solidifying the mixture. The second solid cleansing composition is solid, i.e., it has no fluidity at room temperature (25°C) and normal pressure (1 atmosphere). Although not limited thereto, the composition more preferably has no fluidity at normal pressure and 35°C. Here, "no fluidity" is as defined above.

[0148] The second solid cleansing composition preferably further has a certain hardness. Specifically, it preferably has a hardness such that when a first layer made of the first solid cleansing composition is laminated on a second layer made of the second solid cleansing composition, the first layer does not become recessed or embedded in the second layer, and similarly when the second layer is laminated on the first layer, the first layer does not become recessed or embedded in the second layer. Examples of such hardness include 50 or more. Preferred examples of hardness are 80 to 400. The hardness is explained in the same manner as above.

[0149] The contents of components (2A) to (2D) in the second solid cleansing composition are not limited as described above, but the total amount of components (2A) to (2D) in the composition is preferably 60% by mass or more, more preferably 70 to 100% by mass, even more preferably 80 to 99.9% by mass, and particularly preferably 90 to 99.8% by mass.

[0150] Multi-layered solid cleansing cosmetic The multi-layered solid cleansing cosmetic of the present disclosure comprises at least a first layer consisting of a first solid cleansing composition and a second layer consisting of a second solid cleansing composition.

[0151] The cosmetic may comprise one or more first layers (hereinafter simply referred to as the "first layer") made of a first solid cleansing composition and one or more second layers (hereinafter simply referred to as the "second layer") made of a second solid cleansing composition. The number of each layer is not limited. The cosmetic preferably comprises the same number of first and second layers. Therefore, the cosmetic is one having at least one first layer and at least one second layer. Examples of such cosmetic compositions include those having preferably 1 to 6 layers of each, more preferably 1 to 5 layers, 1 to 4 layers, 1 to 3 layers, or 1 or 2 layers. However, as shown in Figures 1 and 2, the same layers are typically not adjacent to each other.

[0152] To explain an example of such a cosmetic, the cosmetic may be one in which a first layer and a second layer are laminated one on top of the other to form two layers, or one in which a first layer, a second layer and a first layer are laminated in that order, or one in which a second layer, a first layer and a second layer are laminated in that order to form three layers.Furthermore, the cosmetic may be one in which two or more layers are alternately laminated to form multiple layers.

[0153] The cosmetic is usually housed in a container, and each layer may be arranged in any orientation. For example, the second layer may be stacked on top of the first layer, or the first layer may be stacked on top of the second layer (e.g., Product Examples 1 to 3 in Figure 1). Alternatively, the first and second layers may be arranged side-by-side (e.g., Product Example 4 in Figure 1). Alternatively, the first and second layers may be arranged vertically and horizontally (e.g., Product Example 5 in Figure 1).

[0154] The cosmetic may have a multilayer structure of two or more layers formed solely from the first and second layers. Alternatively, the cosmetic may include any other layer (other layer) composed of a solid composition different from the compositions constituting the first and second layers. The number of other layers, the types and amounts of ingredients contained therein, and their arrangement are not limited, as long as the effects of the present disclosure are not impaired (e.g., product examples 6 to 8 in Figure 1 ). Only one type of other layer (e.g., the third layer) may be used, or two or more types of layers (e.g., the third layer, the fourth layer, etc.) may be used (e.g., when the third and fourth layers are used, the compositions constituting the third and fourth layers are different). The other layer is also solid; i.e., it has no fluidity at room temperature (25°C) and normal pressure (1 atm), preferably at normal pressure and 35°C. "No fluidity" is explained as above. Similarly to the first and second layers, it preferably has a desired hardness.

[0155] The number of layers in the cosmetic is not limited and may be set as appropriate, but examples of the total number of layers in the cosmetic include preferably 2 to 8 layers, more preferably 2 to 6 layers, 2 to 5 layers, 2 to 4 layers, 2 or 3 layers, etc. Although not limited thereto, preferred examples of the cosmetic include a cosmetic comprising a first layer and a second layer, more preferably one in which the first layer and the second layer each comprise two layers (a total of four layers), and one in which the first layer and the second layer each comprise one layer (a total of two layers). In the multi-layered solid cleansing cosmetic of the present disclosure, for example, a cosmetic comprising a total of four layers can be referred to as a four-layer solid cleansing cosmetic, and a cosmetic comprising a total of two layers can be referred to as a two-layer solid cleansing cosmetic.

[0156] As such, the layers contained in the cosmetic composition of the present disclosure have the advantage of not having fluidity and the components of each layer not substantially mixing together. For this reason, in the composition of the present disclosure, it is not necessary to place a separator (partition material) at the boundary between the layers, and it is preferable not to place a separator.

[0157] The cosmetic compositions of the present disclosure can be manufactured according to procedures conventionally known in the art. While not limiting the present disclosure, an example of a manufacturing procedure for a two-layer solid cleansing cosmetic composition consisting of only one first layer and only one second layer is as follows: A mixture of components constituting the second solid cleansing composition (second layer) is filled into a container in a molten state, allowed to cool and solidify, and then a mixture of components constituting the first solid cleansing composition (first layer) in a molten state is poured onto the solidified composition (second layer) and allowed to cool and solidify, thereby producing a two-layer solid cleansing cosmetic composition in which the first layer is layered adjacent to the second layer. By reversing the order in which these compositions are filled, a two-layer solid cleansing cosmetic composition in which the second layer is layered adjacent to the first layer can be produced. Alternatively, the cosmetic preparation of the present disclosure may be produced by preparing a solidified first solid cleansing composition (first layer) and a solidified second solid cleansing composition (second layer) in advance, and then layering the compositions in the desired arrangement. When using two or more layers, or when using other layers, the cosmetic preparation can be produced as appropriate according to conventionally known procedures.

[0158] In the cosmetic preparation, the order in which the first and second layers are used is not limited. The second layer may be used after the first layer, or the first layer may be used after the second layer, and preferably the second layer is used after the first layer. In the cosmetic preparation of the present disclosure, the layers may be arranged according to the intended order of use.

[0159] Here, using the second layer after using the first layer is explained as follows: Taking the example of a cosmetic composition of the present disclosure consisting of only two layers, one first layer and one second layer (e.g., Product Example 1 in Figure 1), only the first layer is used for a certain period of time, and after that certain period, only the second layer is used. In this case, for convenience, the second layer is used after the entire first layer has been used.

[0160] The same applies to cases where there are three or more layers in total. For example, when the cosmetic material of the present disclosure is composed of only four layers, with two alternating first and second layers (for example, Product Example 3 in Figure 1), a method can be used in which only the first layer of the first layer is used, then after the first layer of the first layer has been used in its entirety, only the first layer of the second layer is used, then after the first layer of the second layer has been used in its entirety, only the second layer of the first layer is used, and after the second layer of the first layer has been used in its entirety, only the second layer of the second layer is used.

[0161] However, this is not limiting. For example, it can be used in the following manner: Only the first layer of the first layer is used for a certain period of time without using up the first layer (of the first layer), and then only the first layer of the second layer is used for a certain period of time without using up the first layer (of the second layer). After that, the remaining part of the first layer of the first layer is used again for a certain period of time, and then the remaining part of the first layer of the second layer is used for a certain period of time, repeating this cycle until one layer of the first layer and one layer of the second layer are used up. Also, after using up each first layer, use only the second layer of the first layer and only the second layer of the second layer in the same way as the first layer.

[0162] When the first layer is used after the second layer is used, the explanation is the same except that the first and second layers are used in the reverse order. The aforementioned fixed period or the period for using all of one layer is typically, as described below, 2 days or more, preferably about 3 days to 1 month, for example. The arrangement of each layer can be determined depending on the location of the opening of the container, and since the opening is usually at the top of the container (the part where the lid is provided), it is convenient to use them in order from the top. The other layers can be arranged and used within a range that does not interfere with the effects of the present disclosure. Preferably, the first and second layers are used consecutively.

[0163] The cosmetic is used without mixing the first and second layers, and more preferably, even if other layers are included, the cosmetic is used without mixing any of the layers that make up the cosmetic. Note that, for example, when removing the boundary between layers, there are cases where not only one layer but also another adjacent layer is inevitably removed at the same time, but in the present disclosure, this does not mean mixing.

[0164] The cosmetic composition of the present disclosure is not limited as long as it can be applied to the skin (including the scalp, mucous membranes, etc.) The cosmetic composition can be used as a cleansing cosmetic composition used to remove skin dirt such as sebum, sweat, dust, dirt in pores, foundation, lipstick, sunscreen, etc., and can particularly be used to clean makeup cosmetics such as foundation and lipstick.

[0165] The cosmetic of the present disclosure may be applied to the skin in the same manner as conventionally known cleansing cosmetics. For example, an appropriate amount of the cosmetic may be scooped up and used as is, or after contacting with a liquid such as water as needed, by sliding it over the skin. The amount of the cosmetic to be applied and the number of times it is used are not particularly limited, and it may be used in the same manner as conventionally known cleansing cosmetics for skin. Furthermore, the cosmetic of the present disclosure may be applied to the skin after being rinsed off with water or wiped off with cotton or the like, and is not limited thereto. The number of times the cosmetic of the present disclosure is used per day is also not limited, and typically, 1 to 3 times, or 1 or 2 times, for example. The pH of the cosmetic is not limited as long as it has a pH that is suitable for use on the skin.

[0166] The contents of the first and second layers in the cosmetic are not limited, and as described above, the compositions of the present disclosure can be applied to the skin in the same manner as conventional cleansing cosmetics, and therefore may be determined depending on the amount to be applied to the skin, the desired effect, etc. In the cosmetic, the second solid cleansing composition is preferably present in an amount of 0.5 to 2 parts by mass, more preferably 0.8 to 1.5 parts by mass, or 0.8 to 1.2 parts by mass, per part by mass of the first solid cleansing composition, and even more preferably the contents (by mass) of the first solid cleansing composition and the second solid cleansing composition are the same (1:1). The contents may be appropriately determined depending on the total amount of the cosmetic, the number of layers, etc., and may be, for example, about 5 to 90 g, about 10 to 90 g, and preferably about 20 to 75 g per layer. Further, for example, the content to be used up within about 2 days to 1 month per layer (for example, 4 days to 2 months in total for two layers) is exemplified, and more preferably, the content to be used up within about 3 to 40 days, about 3 to 30 days, about 3 to 20 days, about 4 to 20 days, or about 5 to 15 days per layer is exemplified. Furthermore, when using the next layer after using one layer, the use of the next layer may start on the same day as the end of use of the first layer, or may be started on the day after the end of use (for example, 1 to 3 days after the end of use of the first layer). Preferably, the use of the next layer starts on the same day as or the day after the end of use of the first layer.

[0167] Furthermore, it is preferable that the boundary portions of the layers in the cosmetic be arranged so as to be distinguishable by visual inspection, etc. A separator may be provided at the boundary portion of the layers so that the boundary can be recognized by visual inspection or touch, etc. However, it is preferable that the boundary portion of the layers be distinguishable by visual inspection, for example, due to differences in color or gloss of each composition caused by the components contained therein. In the examples described below, no colorant was blended in each composition, but the first layer and the second layer could be distinguished by visual inspection due to the difference in color of the composition.

[0168] As mentioned above, the cosmetic is usually stored in a container. The container may be made of glass, polypropylene, or the like. The shape and appearance of the container are not limited, but a preferred example is one having at least a transparent portion. For example, a transparent portion has additional advantages such as making it easier to visually check the boundaries between layers and to easily see the remaining amount of each layer. Furthermore, if the colors or glosses of the layers differ, these differences can be enjoyed. The cosmetic is usually stored, distributed, etc. in a sealed state with an openable lid attached to the opening of the container.

[0169] For this reason, a preferred example of a cosmetic composition of the present disclosure is a multi-layered solid cleansing cosmetic composition in which a first layer consisting of a 2- to 40-day dose of a first solid cleansing composition and a second layer consisting of a 2- to 40-day dose of a second solid cleansing composition are alternately arranged in two or more layers and stored in a container.

[0170] According to the present disclosure, it is possible to provide a multi-layered solid cleansing cosmetic composition that includes at least a first layer containing at least one component selected from the group consisting of an exfoliating component, a keratin plug removing component, and a keratin softening component, and a second layer containing at least one component selected from the group consisting of an anti-inflammatory component, an antioxidant component, a wrinkle-reducing component, a sagging-reducing component, a whitening component, a moisturizing component, and a bactericidal component, and that is used without mixing the first layer and the second layer.

[0171] Furthermore, according to the present disclosure, it is possible to provide a multi-layered solid cleansing cosmetic composition that has an excellent exfoliating effect, at least one of a keratin removal effect, a keratin plug removal effect, and a keratin softening effect, and at least one of an anti-inflammatory effect, an antioxidant effect, a wrinkle reduction effect, a sagging reduction effect, a whitening effect, a moisturizing effect, and a bactericidal effect. While compositions containing an exfoliating component, an anti-inflammatory component, and compositions containing these components have been known, the present inventors discovered that by using a first layer containing component (1D) and a second layer containing component (2D) in that order without mixing, it is possible to obtain not only the desired exfoliating effect, keratin plug removal effect, and / or keratin softening effect, but also the desired anti-inflammatory effect, antioxidant component, wrinkle reduction component, sagging reduction component, whitening component, moisturizing component, and / or bactericidal component.

[0172] Furthermore, without limiting the present disclosure, as shown in the test examples described below, surprisingly, when the first solid cleansing composition (first layer) and the second solid cleansing composition (second layer) were used separately, better exfoliating and anti-inflammatory effects were obtained than when a composition containing both an exfoliating ingredient and an anti-inflammatory ingredient was used. The present disclosure also provides such an excellent multi-layered solid cleansing cosmetic.

[0173] Furthermore, since the cosmetic of the present disclosure is used without mixing the first layer and the second layer, as described above, the present disclosure also provides a method of using the multi-layered solid cleansing cosmetic, which, as an example, is a cosmetic in which the multi-layered solid cleansing cosmetic is stored in a container with a first layer consisting of a 2-40 day dose of the first solid cleansing composition and a second layer consisting of a 2-40 day dose of the second solid cleansing composition arranged alternately in two or more layers, and which method of using the cosmetic comprises: (1) using only the first layer for 2-40 days, followed by using only the second layer for 2-40 days; or (2) using only the second layer for 2-40 days, followed by using only the first layer for 2-40 days.

[0174] For example, from the viewpoint of easier use, more preferred examples of the method of using the cosmetic are that in step (1), the first layer is used in its entirety before the second layer is started to be used, or that in step (2), the second layer is used in its entirety before the first layer is started to be used.

[0175] The method of use of the multi-layered solid cleansing cosmetic composition is also the same as that described above. The order of use, period of use, etc. are also the same as those described above. [Example]

[0176] Hereinafter, the embodiments of the present disclosure will be described more specifically with reference to examples, but the embodiments of the present disclosure are not limited to the following examples.

[0177] Test Example 1. Preparation procedure for multi-layered solid cleansing cosmetics, etc. A first solid cleansing composition (first layer) and a second solid cleansing composition (second layer) were prepared according to the following procedure (Composition Examples 1-1 to 1-3, Composition Examples 2-1 to 2-3). Additionally, multi-layered solid cleansing cosmetics comprising the first solid cleansing composition (first layer) and the second solid cleansing composition (second layer) were prepared (Examples 1 and 2).

[0178] In this test example, lactobionic acid was used as component (1D) and stearyl glycyrrhizinate was used as component (2D). The synthetic wax used in this test example was Fischer-Tropsch wax. The same applies hereinafter. 1-1. Preparation of First Solid Cleansing Composition (First Layer) (Composition Examples 1-1 to 1-3, Comparative Examples 1 to 4) First solid cleansing compositions were prepared according to Table 1. Specifically, the first solid cleansing compositions were prepared according to the following procedure (Composition Examples 1-1 to 1-3). 1) Components (1A), (1B), and (1C) shown in Table 1 were mixed uniformly while heating to about 90°C to obtain a mixture. 2) The mixture obtained by mixing the component (1D) shown in Table 1 with water was added to the mixture obtained in 1), and the mixture was mixed uniformly while maintaining the temperature at about 90°C to obtain a mixture. 3) To the mixture obtained in 2), phenoxyethanol shown in Table 1 was added, and the mixture was mixed uniformly while maintaining the temperature at about 90°C to obtain a mixture. 4) 45 g of the mixture obtained in 3) above was filled into a jar (a cylindrical container with an inner diameter of 6 cm, made of polypropylene resin) while still in a molten state at 80°C, and then allowed to cool to room temperature (25°C) to prepare a first solid cleansing composition contained in a jar.

[0179] In the same manner, solid cleansing compositions of Comparative Examples 1 to 4 (comparative solid cleansing compositions) were prepared.

[0180] 1-2. Preparation of second solid cleansing composition (second layer) (Composition examples 2-1 to 2-3, comparative examples 5 and 6) Second solid cleansing compositions were prepared according to Table 2 below. Specifically, the second solid cleansing compositions were prepared according to the following procedure (Composition Examples 2-1 to 2-3). 1) Components (2A), (2B), and (2C) shown in Table 1 were mixed uniformly while heating to about 90°C to obtain a mixture. 2) The component (2D) shown in Table 1 was added to the mixture obtained in 1) above, and mixed uniformly while maintaining the temperature at about 90°C to obtain a mixture. 3) To the mixture obtained in 2), phenoxyethanol shown in Table 1 was added, and the mixture was mixed uniformly while maintaining the temperature at about 90°C to obtain a mixture. 4) 45 g of the mixture obtained in 3) above was filled into a jar (same as above) while still in a molten state at 80°C, and then allowed to cool to room temperature (25°C) to prepare a second solid cleansing composition contained in a jar.

[0181] In the same manner, solid cleansing compositions of Comparative Examples 5 and 6 (comparative solid cleansing compositions) were prepared.

[0182] 1-3. Preparation of multi-layered solid cleansing cosmetic composition having a first layer and a second layer (Examples 1 and 2) As in Composition Example 2-1, 45 g of the mixture in a molten state was filled into a jar (same as above) at 80°C and then allowed to cool to room temperature (25°C) to prepare a second solid cleansing composition housed in a jar. The layer thus obtained was designated the second layer. Next, as in Composition Example 1-1, 45 g of the mixture in a molten state was poured onto the second layer and allowed to cool and solidify at room temperature (25°C), yielding a first solid cleansing composition. The layer thus obtained was designated the first layer. In this way, a two-layer solid cleansing cosmetic (Example 1) was obtained in which a layer (first layer) made of the first solid cleansing composition was laminated on a layer (second layer) made of the second solid cleansing composition within a jar. Note that the second layer did not melt during lamination of the first layer, and the first and second layers did not mix. Furthermore, the first layer was light pink and the second layer was light yellow, and the boundary between these layers was clearly visible.

[0183] A two-layer solid cleansing cosmetic (Example 2) was obtained in the same manner as in Example 1, except that Composition Example 2-2 was used instead of Composition Example 2-1 and Composition Example 1-2 was used instead of Composition Example 1-1, in which a layer (first layer) made of the first solid cleansing composition of Composition Example 1-2 was laminated on a layer (second layer) made of the second solid cleansing composition of Composition Example 2-2. In this case too, the first and second layers did not mix, and the boundary between the layers was clearly visible due to the difference in color of the layers.

[0184] 1-4. Preparation of Mixture (Comparative Example 7) The mixture of Composition Example 1-2 shown in Table 1 was obtained according to procedures 1) to 3) described in "1-1. Preparation of the first solid cleansing composition (first layer) (Composition Examples 1-1 to 1-3, Comparative Examples 1 to 4)" above. The mixture of Composition Example 2-2 shown in Table 2 was obtained according to procedures 1) to 3) described in "1-2. Preparation of the second solid cleansing composition (second layer) (Composition Examples 2-1 to 2-3, Comparative Examples 5 and 6)" above. Next, 22.5 g of the mixture of Composition Example 1-2 kept at approximately 90°C was thoroughly mixed with 22.5 g of the mixture of Composition Example 2-2 kept at approximately 90°C. 45 g of the resulting mixture was filled in a jar (same as above) in the molten state at 80°C in the same manner as in 4) above, and then allowed to cool to room temperature (25°C) to obtain a solid mixture contained in a jar (Comparative Example 7).

[0185] Thus, the mixture of Comparative Example 7 is a mixture of the components shown in Composition Example 1-2 in Table 1 and the components shown in Composition Example 2-2 in Table 2 (containing both an exfoliating component and an anti-inflammatory component). In contrast, the two-layer solid cleansing cosmetic of Example 2 differs from the mixture of Comparative Example 7 mainly in that the components (composition) shown in Composition Example 1-2 in Table 1 and the components (composition) shown in Composition Example 2-2 in Table 2 are arranged independently without being mixed together.

[0186] 2. Evaluation Procedure The compositions, cosmetics and mixtures obtained as described above were evaluated for exfoliation (transparency), redness (anti-inflammatory) and irritation according to the following procedures.

[0187] Exfoliation evaluation (transparency) For the solid cleansing compositions of Composition Examples 1-1 to 1-3, Composition Examples 2-1 to 2-3, and Comparative Examples 1 to 6, 3 g of the composition was taken with the fingers and spread on the skin (2.5 cm × 2.5 cm) of five expert panelists. After washing with running tap water (20°C) (the amount of water and time required for washing were the same for all cases), the exfoliation (transparency) of the skin was evaluated. The exfoliation was compared with the exfoliation achieved using the composition of Comparative Example 2 (referred to as Standard A) and evaluated according to the following criteria. The degree of exfoliation was visually confirmed and the panelists were compared in advance to standardize the criteria. Washing was performed once daily for 15 consecutive days. The test start date was designated as Day 1, and the skin immediately after washing on Day 15 was evaluated.

[0188] <Exfoliation evaluation criteria> 3 points: More dead skin cells removed than standard A (better transparency) 2 points: Same level of exfoliation as standard A (same transparency) 1 point: Less dead skin removed than standard A (less transparent) When the average score calculated from the total points of the five panelists was 1 or more but less than 1.6, it was evaluated as "X", when it was 1.6 or more but less than 2.4, it was evaluated as "△", and when it was 2.4 or more but less than 3. To make the evaluation easier, in Table 1, the results when the cleansing composition of Comparative Example 2 was used are indicated as "△ (Criterion A)".

[0189] Redness evaluation For the solid cleansing compositions of Composition Examples 1-1 to 1-3, Composition Examples 2-1 to 2-3, and Comparative Examples 1 to 6, 3 g of the composition was taken with the fingers, spread on the skin, washed, and then evaluated for redness of the skin in the same manner as in the evaluation of exfoliation. The redness was compared with the redness observed when the composition of Comparative Example 6 was used (classification B) and evaluated according to the following criteria. The degree of redness was confirmed visually and the results were compared in advance among panelists to standardize the criteria. The evaluation was also conducted by washing once a day for 15 consecutive days, with the start of the test being designated as day 1, and the skin immediately after washing on day 15 was evaluated.

[0190] <Evaluation criteria for redness suppression (anti-inflammatory)> 3 points: Redness is suppressed more than standard B (redness is light, the area of ​​redness is narrow, or no redness is observed) 2 points: Redness is observed to the same extent as standard B 1 point: Redness is greater than standard B (dark redness or wide redness) When the average score calculated from the total points of the five panelists was 1 or more and less than 1.6, it was evaluated as "X", when it was 1.6 or more and less than 2.4, it was evaluated as "△", and when it was 2.4 or more and 3, it was evaluated as "O". To make the evaluation easier, in Table 2, the case where the cleansing composition of Comparative Example 6 was used is indicated as "△ (Criterion B)".

[0191] Stimulus assessment For the solid cleansing compositions of Composition Examples 1-1 to 1-3, Composition Examples 2-1 to 2-3, and Comparative Examples 1 to 6, 3 g of the composition was taken with the fingers, spread on the skin, and then washed, and the irritation felt on the skin was evaluated in the same manner as in the evaluation of exfoliation. The irritation felt when the composition of Comparative Example 3 was used (classified as "Criterion C") was compared and evaluated according to the following criteria. The level of irritation was compared in advance among panelists to unify the criteria. The evaluation was also conducted by washing once a day for 15 consecutive days, with the start of the test being designated as day 1, and the skin immediately after washing on day 15 was evaluated.

[0192] <Stimulus evaluation criteria> 3 points: Less irritation than standard C 2 points: Feel the same level of stimulation as standard C 1 point: Feels more irritated than standard C When the average score calculated from the total points of the five panelists was 1 or more and less than 1.6, it was evaluated as "X", when it was 1.6 or more and less than 2.4, it was evaluated as "△", and when it was 2.4 or more and 3, it was evaluated as "O". To make the evaluation easier, in Table 1, the case where the cleansing composition of Comparative Example 3 was used is indicated as "△ (Criterion C)".

[0193] The evaluation results of Composition Examples 1-1 to 1-3 (first solid cleansing composition) and the comparative solid cleansing compositions of Comparative Examples 1 to 4 are shown in Table 1. The evaluation results of Composition Examples 2-1 to 2-3 (second solid cleansing composition) and the comparative solid cleansing compositions of Comparative Examples 5 and 6 are shown in Table 2.

[0194] For Examples 1 and 2 (two-layer solid cleansing cosmetics), each cosmetic was used starting with the first layer, with the second layer starting the day after the first layer was used up. The evaluation was carried out by cleansing with the first layer once daily for 15 consecutive days, followed by cleansing with the second layer once daily for 15 consecutive days. The skin was evaluated in the same manner as above immediately after cleansing on the 30th day after starting use of the first layer. The results are shown in Table 3.

[0195] For Comparative Example 7 (a mixture of the first solid cleansing composition and the second solid cleansing composition), cleansing was carried out once a day for 15 consecutive days in the same manner as for Composition Example 1-1, except that the composition of Composition Example 1-1 was replaced with the mixture of Comparative Example 7. The test started on day 1, and the skin was evaluated immediately after cleansing on day 15. The results are shown in Table 3.

[0196] 3.Results The results are shown in Tables 1 to 3.

[0197] [Table 1]

[0198] [Table 2]

[0199] [Table 3]

[0200] As shown in Table 1, for the compositions shown in Comparative Examples 1 and 2, the evaluation result for irritation was O, but the evaluation result for exfoliation was X or △, and the evaluation result for redness (anti-inflammation) was X. Furthermore, for the compositions shown in Comparative Examples 3 and 4, the evaluation result for exfoliation was O, but the evaluation result for redness was X, and the evaluation result for irritation was △ or X.

[0201] On the other hand, as shown in Table 1, the first solid cleansing compositions shown in Composition Examples 1-1 to 1-3 were evaluated as having good exfoliation performance, demonstrating desirable exfoliation effects, and were also evaluated as having good irritation performance. However, these composition examples still received poor evaluations of redness. This indicates that the first solid cleansing compositions shown in Composition Examples 1-1 to 1-3 did not achieve the desired exfoliation and redness-suppressing effects.

[0202] Furthermore, as shown in Table 2, the compositions shown in Comparative Examples 5 and 6 were evaluated as having an irritation rating of ○, but the exfoliation rating was × for both, and the redness rating was × or △, indicating that the desired exfoliation effect and redness suppression effect were not observed.

[0203] On the other hand, as shown in Table 2, the second solid cleansing compositions shown in Composition Examples 2-1 to 2-3 were evaluated as ○ for redness and ○ for irritation. However, the exfoliation evaluation results for these compositions were ×. This indicates that the second solid cleansing compositions shown in Composition Examples 2-1 to 2-3 did not achieve the desired exfoliating effect and redness-suppressing effect.

[0204] Under these circumstances, as shown in Table 3, in the multi-layered solid cleansing cosmetics of Examples 1 and 2, even though the first solid cleansing composition (first layer) and the second solid cleansing composition (second layer) were used in that order without being mixed, the results for the exfoliation evaluation, redness evaluation, and irritation evaluation were all good, indicating that irritation was suppressed and the desired exfoliation effect and redness suppression effect were observed.

[0205] As mentioned above, the first solid cleansing compositions shown in Composition Examples 1-1 to 1-3 can be said to have the desired exfoliating effect, and the second solid cleansing compositions shown in Composition Examples 2-1 to 2-3 can be said to have the desired redness-suppressing effect. Based on this, it was expected that the mixture of Comparative Example 7 (a mixture of Composition Examples 1-2 and 2-2) would achieve both the desired exfoliating effect and the desired redness-suppressing effect. However, contrary to this expectation, as shown in Table 3, the mixture of Comparative Example 7 achieved a ○ rating for irritation suppression, but only a △ rating for exfoliation and a × rating for redness suppression.

[0206] In particular, the mixture of Comparative Example 7 contained 0.5% by mass of an exfoliating ingredient and 0.025% by mass of an anti-inflammatory ingredient. Because the contents of these ingredients were greater than those in the multi-layered cosmetic of Example 1 (in Example 1, the first layer contained only 0.1% by mass of an exfoliating ingredient, and the second layer contained only 0.01% by mass of an anti-inflammatory ingredient), it was expected that Comparative Example 7 would provide a better exfoliating effect and redness-suppressing effect than Example 1. However, contrary to this expectation, Example 1 was evaluated as having an excellent exfoliating effect and a good redness-suppressing effect, demonstrating the desired exfoliating effect and redness-suppressing effect, whereas Comparative Example 7, as mentioned above, was evaluated as having an excellent exfoliating effect and a bad redness-suppressing effect, demonstrating clearly inferior effects to those of Example 1.

[0207] Table 3 shows the results of using each layer of the cosmetics of Examples 1 and 2 for 15 days, but similarly good results were obtained when each layer of each cosmetic was used for 2 days.Similarly good results were also obtained when each layer of each cosmetic of Examples 1 and 2 was used for 7 days.

[0208] In addition, in Composition Examples 1-1 to 1-3 and Composition Examples 2-1 to 2-3, even when the amount of each composition filled into the container was 90 g (i.e., washing was performed once a day for 30 consecutive days, the start of the test was considered to be day 1, and evaluation was performed on the skin immediately after washing on day 30), the results were similar to the 15-day test results.

[0209] As can be seen from this, the multi-layered solid cleansing cosmetic of the present disclosure is a cleansing cosmetic that has a unique form in that it is solid yet multi-layered. Furthermore, the present disclosure thus provides a multi-layered solid cleansing cosmetic that suppresses irritation and provides the desired exfoliating and anti-inflammatory effects, even though the exfoliating component (first layer) and the anti-inflammatory component (second layer) are not mixed and the components are used at different times.

[0210] Although the results are not shown, when the cosmetics of Examples 1 and 2 were used as cleansing agents, they were able to thoroughly cleanse away sebum, sweat, dust, dirt from pores, foundation, lipstick, sunscreen, and other dirt.

[0211] Prescription example An example of a multi-layered solid cleansing cosmetic according to the present disclosure is shown below. A multi-layered solid cleansing cosmetic was prepared by laminating layers one by one in the same manner as in the above-described test example, with the first solid cleansing composition of Composition Examples 1-4 shown in Table 4 as the upper layer and the second solid cleansing composition of Composition Examples 2-4 shown in Table 5 as the lower layer. This resulted in a favorable multi-layered solid cleansing cosmetic having a first layer containing component (1D) and a second layer containing component (2D), with the first layer and the second layer being used without being mixed.

[0212] When any of Composition Examples 1-5 to 1-9 was used as the first solid cleansing composition instead of Composition Example 1-4, or when any of Composition Examples 2-5 or 2-6 was used as the second solid cleansing composition instead of Composition Example 2-4, a good multi-layered solid cleansing cosmetic was obtained, similar to the above, which had a first layer containing component (1D) and a second layer containing component (2D), and which was used without mixing the first layer and the second layer.

[0213] The multi-layered solid cleansing cosmetic thus obtained is used in the same manner as in the test example, with the first layer containing component (1D) and the second layer containing component (2D) being used in that order without mixing the two layers, and by doing so, the beneficial effects attributable to component (1D) and component (2D) can be obtained at the end of use of the cosmetic.

[0214] [Table 4]

[0215] [Table 5]

Claims

1. A multi-layered solid cleansing cosmetic comprising a first layer and a second layer, having the following characteristics: the first layer comprises a first solid cleansing composition containing (1A) 3 to 13 mass % of a solid oil having a melting point of 40 to 120°C, (1B) 10 to 80 mass % of a liquid oil, (1C) 10 to 30 mass % of a nonionic surfactant, and (1D) a total amount of 0.05 to 5 mass % of at least one component selected from the group consisting of an exfoliating component, a keratin plug removing component, and a keratin softening component; the second layer comprises a second solid cleansing composition containing (2A) 1 to 10% by mass of a solid oil having a melting point of 40 to 120°C, (2B) 10 to 86% by mass of a liquid oil, (2C) 5 to 20% by mass of a nonionic surfactant, and (2D) a total amount of 0.01 to 1% by mass of at least one component selected from the group consisting of an anti-inflammatory component, an antioxidant component, a wrinkle-reducing component, a sagging-reducing component, a whitening component, a moisturizing component, and a bactericidal component; The first layer and the second layer are used without being mixed, The component (1D) and the component (2D) are different, The first layer does not contain component (2D), and the second layer does not contain component (1D).

2. 2. The multi-layered solid cleansing cosmetic according to claim 1, wherein component (1D) is at least one selected from the group consisting of organic acids, gluconolactone, ribonolactone, clay minerals, inorganic oxides, inorganic salts, sulfur compounds, charcoal powder, plant extracts, fermented honey, enzymes, and nitrogenous compounds, and has at least one action selected from the group consisting of exfoliating action, keratin plug removing action, and keratin softening action, and components (1C) and (2C) are the same or different and are at least one nonionic surfactant selected from the group consisting of polyglycerin fatty acid esters and polyoxyethylene fatty acid glyceryl.

3. 3. The multi-layered solid cleansing cosmetic preparation according to claim 1, wherein the component (1D) is at least one selected from the group consisting of glycolic acid, lactic acid, malic acid, tartaric acid, citric acid, mandelic acid, salicylic acid, caproyl salicylic acid, lactobionic acid, gluconolactone, ribonolactone, talc, sericite, zeolite, kaolin, bentonite, saponite, hectorite, natural clay, sea mud, activated clay, volcanic soil, rhyolite powder, magnesium carbonate, hydroxyapatite, anhydrous silicic acid, magnesium sulfate, sodium chloride, sulfur, activated carbon, medicinal charcoal, bamboo charcoal, peat, broccoli extract, annatto seed extract, artichoke leaf extract, fermented rose honey, lipase, papain, and urea.

4. 3. The multi-layered solid cleansing cosmetic according to claim 1, wherein the anti-inflammatory ingredient described in component (2D) is at least one selected from the group consisting of glycyrrhizinic acid, glycyrrhetinic acid, salts thereof, licorice leaf extract, licorice root extract, nicotinamide, tranexamic acid, allatoin, and Centella asiatica extract.

5. 3. The multi-layered solid cleansing cosmetic according to claim 1, wherein the antioxidant component described in component (2D) is at least one selected from the group consisting of astaxanthin, vitamin E, vitamin C, fullerene, and resveratrol.

6. 3. The multi-layered solid cleansing cosmetic according to claim 1, wherein the wrinkle-reducing component and / or sagging-reducing component described in component (2D) is at least one selected from the group consisting of bakuchiol, vitamin A, placenta, stem cell culture medium, peptides, vitamin E, carbonic acid, and mannan.

7. 3. The multi-layered solid cleansing cosmetic according to claim 1, wherein the whitening ingredient described in component (2D) is at least one selected from the group consisting of tranexamic acid, a salt thereof, arbutin, vitamin C, hydroquinone, placenta, kojic acid, linoleic acid, nicotinamide, vitamin A, phenylethylresorcinol, and ferulic acid.

8. 3. The multi-layered solid cleansing cosmetic according to claim 1, wherein the moisturizing component described in component (2D) is at least one selected from the group consisting of isomerized corn syrup, heparinoids, and ceramides.

9. 3. The multi-layered solid cleansing cosmetic according to claim 1, wherein the bactericidal component described in component (2D) is at least one selected from the group consisting of isopropyl phenol, salicylic acid, vitamin C, and vitamin B.

10. 3. The multi-layered solid cleansing cosmetic according to claim 1, wherein a first layer consisting of a 2-40 day dose of the first solid cleansing composition and a second layer consisting of a 2-40 day dose of the second solid cleansing composition are alternately arranged in two or more layers and stored in a container.

11. A method for using the multi-layered solid cleansing cosmetic composition according to claim 1 or 2, comprising: The multi-layered solid cleansing cosmetic is a cosmetic that is stored in a container in a state in which a first layer consisting of a 2-40 day dose of a first solid cleansing composition and a second layer consisting of a 2-40 day dose of a second solid cleansing composition are alternately arranged in two or more layers, (1) Use only the first layer for 2 to 40 days, then use only the second layer for 2 to 40 days, or (2) Use only the second layer for 2 to 40 days, then use only the first layer for 2 to 40 days. A method for using the multi-layered solid cleansing cosmetic.

12. In the step (1), the use of the second layer is started after the entire amount of the first layer has been used, or In the step (2), the use of the first layer is started after the entire amount of the second layer has been used. A method for using the cleansing cosmetic composition according to claim 11.

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