Black solid external component

Abstract

An objective of the present invention is to provide a black solid external composition that is black and lustrous (glossy), and has excellent stability. A black solid external composition containing (1) 0.02 to 10 mass% of charcoal having a particle diameter of 0.05-0.9 μm, (2) at least 0.1 parts by mass, per 1 part by mass of the charcoal, of at least one selected from the group consisting of fatty acids and polymers thereof, (3) a liquid oil, and (4) a solid oil having a melting point of 40-120°C.

Description

[Technical Field]

[0001] The present invention relates to a black solid composition for external use. [Background technology]

[0002] Today, various topical compositions such as cleansing agents, facial cleansers, and lip creams are commercially available. When selecting a product from the many available options, not only efficacy but also appearance are important factors. For example, cleansing agents and facial cleansers are useful for effectively removing dirt such as sebum and dust, and makeup cosmetics attached to the skin. Many solid and liquid cleansing agents and facial cleansers are known. One example is a solid oil-based cleansing cosmetic that contains 5 to 15% by mass of (A) a hydrocarbon oil having a melting point of 60 to 120°C based on the total amount of the cosmetic, 35% by mass or more of (B) an ester oil based on the total amount of the liquid oil, and 5 to 30% by mass of (C) a nonionic surfactant having an HLB value of 5 to 13 based on the total amount of the cosmetic. It has been disclosed that this cleansing cosmetic does not drip, is compatible with makeup cosmetics, and is excellent at removing dirt, etc. (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-206974 Summary of the Invention [Problem to be solved by the invention]

[0004] While various topical compositions are known, the present disclosure aims to provide a black, glossy (shiny) solid topical composition that is black and has excellent stability. [Means for solving the problem]

[0005] The present inventors conducted extensive research to solve the above-mentioned problems and found that a solid topical composition that is deep black, glossy, and highly stable can be obtained by combining (1) 0.02 to 10% by mass of charcoal having a particle size of 0.05 to 0.9 μm, (2) at least 0.1 part by mass of at least one selected from the group consisting of fatty acids and their polymers per part by mass of the charcoal, (3) liquid oil, and (4) a solid oil having a melting point of 40 to 120°C. The present invention was completed through further research based on this finding. Specifically, the present disclosure encompasses the following inventions. Item 1. A black solid composition for external use, comprising: (1) 0.02 to 10% by mass of charcoal having a particle size of 0.05 to 0.9 μm; (2) 0.1 parts by mass or more of at least one selected from the group consisting of fatty acids and polymers thereof per part by mass of the charcoal; (3) liquid oil; and (4) a solid oil having a melting point of 40 to 120°C. Item 2. The black solid composition for external use according to Item 1, wherein the L value in the CIELAB color system measured with a spectrophotometer is 35 or less. Item 3. The black solid composition for external use according to Item 1 or 2, wherein the fatty acid described in component (2) has 14 to 20 carbon atoms. Item 4. The black solid composition for external use according to any one of Items 1 to 3, wherein the content of the component (4) is 2 to 25% by mass. Item 5. The black solid composition for external use according to any one of Items 1 to 4, wherein the content of the component (3) is 20 to 97% by mass. [Effects of the Invention]

[0006] By blending the above (1) to (4), it is possible to provide a solid external composition that is deep black, glossy (shiny), and has excellent stability. DETAILED DESCRIPTION OF THE INVENTION

[0007] The embodiments included in the present disclosure are described in further detail below.

[0008] The present disclosure encompasses a black solid composition for external use that contains (1) 0.02 to 10% by mass of charcoal having a particle size of 0.05 to 0.9 μm, (2) at least one member selected from the group consisting of fatty acids and their polymers in an amount of 0.1 part by mass or more per part by mass of the charcoal, (3) liquid oil, and (4) solid oil having a melting point of 40 to 120°C.

[0009] The black solid composition for external use of the present disclosure contains (1) 0.02 to 10 mass % of charcoal having a particle size of 0.05 to 0.9 μm. The composition is not limited thereto, but preferred examples of the charcoal include activated charcoal, medicinal charcoal, bamboo charcoal, and wood charcoal, and more preferred examples include activated charcoal and medicinal charcoal. These may be used alone or in combination of two or more.

[0010] The particle size of the charcoal is not limited to this, but is preferably 0.08 to 0.8 μm, more preferably 0.1 to 0.7 μm, for example. Thus, the charcoal is a powdered charcoal with a very small particle size. These may be used alone or in combination of two or more. Note that the particle size values ​​in this disclosure are values ​​based on the volume average particle size, and are values ​​measured by a laser diffraction / scattering method. More specifically, they are values ​​measured by wet particle size distribution measurement using a laser diffraction particle size distribution analyzer, and do not indicate the primary particle size.

[0011] In the black solid external composition of the present disclosure, the content of charcoal having a particle size of 0.05 to 0.9 μm is not limited as long as it is 0.02 to 10 mass %, and is preferably 0.03 to 5 mass %, and more preferably 0.07 to 2 mass %, for example.

[0012] The black solid topical composition of the present disclosure contains (2) at least one selected from the group consisting of fatty acids and their polymers (hereinafter, sometimes referred to as "fatty acid, etc.") in an amount of 0.1 parts by mass or more per part by mass of the charcoal (charcoal having a particle size of 0.05 to 0.9 μm). The number of carbon atoms in the fatty acid is not limited, but is preferably 14 to 20, more preferably 16 to 18, etc. Fatty acids may be linear or branched, and may be saturated or unsaturated. In the case of unsaturated fatty acids, the number of double bonds between carbon atoms is not limited, but is 1 to 4, preferably 1 to 3, and more preferably 1 or 2. The fatty acid may have a substituent such as a hydroxyl group. Examples of such fatty acids include hydroxy fatty acids, such as hydroxystearic acid. The polymer of fatty acid may be a polymer of any of these fatty acids. The degree of polymerization is also not limited as long as the effects of the present disclosure are obtained, but is preferably 1 to 10, more preferably 2 to 8 (average degree of polymerization).

[0013] Although not limiting the present disclosure, preferred examples of fatty acids and polymers thereof include palmitic acid, stearic acid, isostearic acid, oleic acid, hydroxystearic acid, polyhydroxystearic acid, etc. The fatty acids and polymers thereof may be used singly or in combination of two or more. Although not limiting the present disclosure, these are commercially available, and examples thereof include NAA-142, NAA-173K, NAA-160 (NOF Corporation), Isostearic Acid EX (Kyoto Alcohol Industry Co., Ltd.), Oleic Acid D-100 (New Japan Chemical Co., Ltd.), 12-hydroxystearic acid (Ito Oil Mills, Ltd.), and HS Oligomer 600 (Nikko Chemicals Co., Ltd.).

[0014] In the black solid topical composition of the present disclosure, the content of at least one selected from the group consisting of fatty acids and polymers thereof is not limited as long as it is 0.1 part by mass or more per part by mass of the charcoal (charcoal having a particle size of 0.05 to 0.9 μm), and is preferably 0.15 to 20 parts by mass, more preferably 0.15 to 10 parts by mass, particularly preferably 0.15 to 5 parts by mass, and particularly more preferably 0.15 to 2 parts by mass.

[0015] The black solid topical composition of the present disclosure contains (3) liquid oil. In the present disclosure, liquid oil refers to oil that is liquid at room temperature (25°C). The liquid oil is not limited as long as it can provide the effects of the present disclosure, but examples include ester oil, hydrocarbon oil, animal and vegetable oil, silicone oil, higher alcohol, etc., and preferred examples include ester oil, animal and vegetable oil, and hydrocarbon oil. These may be used alone or in combination of two or more.

[0016] Examples of such liquid oils include, but are not limited to, ester oils such as ethylhexyl palmitate, ethylhexyl isopalmitate, isopropyl palmitate, isopropyl myristate, caprylic / capric triglyceride, cetyl ethylhexanoate, isotridecyl isononanoate, triethylhexanoin, pentaerythristyl tetraethylhexanoate, octyldodecyl myristate, diisostearyl malate, triethylhexanoin, and bisethoxydiglycol cyclohexane-1,4-dicarboxylate; mineral oil; Examples include hydrocarbon oils such as undecane, 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. These may be used alone or in combination of two or more.

[0017] Although not limiting the present disclosure, the liquid oil preferably contains at least one selected from the group consisting of ester oils and hydrocarbon oils, or at least one selected from the group consisting of ester oils, hydrocarbon oils, and animal and vegetable oils.More preferably, the black solid topical composition of the present disclosure contains at least one liquid oil selected from the group consisting of cetyl ethylhexanoate, dodecane, ethylhexyl palmitate, ethylhexyl isopalmitate, isopropyl palmitate, isopropyl myristate, caprylic / capric triglyceride, isotridecyl isononanoate, triethylhexanoin, pentaerythristyl tetraethylhexanoate, octyldodecyl myristate, and triethylhexanoin.

[0018] The content of component (3) in the black solid topical composition of the present disclosure is not limited as long as the effects of the present disclosure are obtained, but is preferably 20 to 97% by mass, more preferably 30 to 95% by mass, and even more preferably 50 to 90% by mass of the composition.

[0019] Furthermore, although this disclosure is not intended to be limiting, as an example, the content of ester oil as component (3) in the black solid topical composition of the present disclosure may be 17 to 97% by mass, more preferably 28 to 95% by mass, and even more preferably 48 to 90% by mass. Furthermore, although this disclosure is not intended to be limiting, as an example, when the content of component (3) in the black solid topical composition of the present disclosure is 20 to 97% by mass, the content of the ester oil in the composition may be 17 to 97% by mass. As a more preferred example, when the content of component (3) is 50 to 90% by mass, the content of the ester oil in the composition may be 48 to 90% by mass. These values ​​may be appropriately set taking into account the above-mentioned numerical ranges, etc.

[0020] The black solid composition for external use of the present disclosure contains (4) a solid oil having a melting point of 40 to 120° C. The solid oil is not limited thereto, but examples thereof include a solid oil having a melting point of preferably 50 to 100° C., more preferably a solid oil having a melting point of 60 to 95° C., particularly preferably a solid oil having a melting point of 65 to 90° C., and even more particularly preferably a solid oil having a melting point of 70 to 90° C. Thus, component (4) is solid at room temperature (25° C.).

[0021] Examples of component (4) include hydrocarbon waxes such as paraffin wax, polyethylene wax, ethylene-propylene copolymer, microtristan wax, ceresin wax, Fischer-Tropsch wax, and ozokerite wax, as well as candelilla wax, rice wax, beeswax, carnauba wax, hydrogenated jojoba oil, hardened oil, silicone wax, and higher alcohols, and these may be used alone or in combination of two or more.

[0022] Although not limiting the present disclosure, component (4) is commercially available, and examples thereof include MULTI WAX X-445 (Sonnebon), PMWAX82, Hi-Mic-1070 (Nippon Seiro Co., Ltd.), CireWax80, CireWax90 (Cirebelle Fine Chemicals Pty Ltd.), Micropoly 204 (Micro Powders, Inc.), Sasolwax C80 (Sasol), PERFORMALENE PL, PERFORMALENE 500, PERFORMALENE 655 (NEW PHASE TECHNOLOGIES), NJ Wax (Nikko Rica Corporation), NC-1630, refined carnauba wax (Cerarica Co., Ltd.), and Beeswax Golden Brand (Miki Chemical Industry Co., Ltd.).

[0023] The content of component (4) in the black solid topical composition of the present disclosure is not limited as long as the effects of the present disclosure are obtained, but is preferably 2 to 25% by mass, more preferably 3 to 15% by mass, and even more preferably 4 to 10% by mass in the composition.

[0024] The black solid topical composition of the present disclosure may further 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 conventional topical preparations such as cleansing agents and detergents. Examples of such ingredients include silica, surfactants (nonionic surfactants, cationic surfactants, anionic surfactants, amphoteric surfactants, etc.), bases, moisturizing ingredients, anti-inflammatory ingredients, whitening ingredients, fragrances, colorants, refreshing agents, antioxidants, preservatives, thickeners, emulsifiers, pH adjusters, enzymes, natural extracts such as animal and plant extracts, and active ingredients such as vitamins. 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 being determined appropriately.

[0025] Although not limiting the present disclosure, examples of silica as another component include fumed silica. Regarding fumed silica, fumed silica is a fine amorphous silica also known as fumed silica, which is conventionally known and may be silica that has been hydrophobized by dimethyldichlorosilane treatment, hexamethyldisilazane treatment, or the like. When fumed silica is incorporated in the present disclosure, the particle size of the fumed silica is preferably 40 nm or less, more preferably 25 nm or less, and even more preferably 3 to 15 nm, without any particular limitation, provided that the effects of the present disclosure are not impaired. Fumed silica is commercially available, and examples include products such as Aerosil 200 (Nippon Aerosil). These may be used alone or in combination of two or more. The particle size refers to the average particle size, and the particle size is measured according to the method used for Aerosil 200 (Nippon Aerosil). The particle size of fumed silica refers to the average particle size of primary particles.

[0026] When the black solid composition for external use of the present disclosure contains silica, the content thereof is not limited as long as it does not impede the effects of the present disclosure. However, examples of the content thereof include a content of preferably 0.05 to 10% by mass, more preferably 0.1 to 8% by mass, and even more preferably 0.1 to 5% by mass in the composition.

[0027] Furthermore, while not limiting the present disclosure, examples of surfactants as other components include nonionic surfactants, cationic surfactants, anionic surfactants, and amphoteric surfactants. In the present disclosure, preferred examples of surfactants include nonionic surfactants and anionic surfactants, and more preferred examples include nonionic surfactants. Furthermore, while not limited thereto, preferred examples of surfactants include surfactants with an HLB value of 5 to 13, and more preferred examples include surfactants with an HLB value of 6 to 12. The HLB (Hydrophile Lypophile Balance) value is a well-known index for determining the balance between hydrophilicity and lipophilicity. Within the HLB range of 0 to 20, a smaller HLB value indicates stronger lipophilicity, and a larger HLB value indicates stronger hydrophilicity. In the present disclosure, HLB is typically calculated according to the Griffin equation. These may be used alone or in combination of two or more.

[0028] Although not limiting the present disclosure, examples of nonionic surfactants include polyoxyethylene fatty acid glyceryl, polyglycerin, and sorbitan sesquioleate.

[0029] For example, fatty acids constituting polyoxyethylene fatty acid glyceryl are not limited to those of the present disclosure, but are preferably exemplified by fatty acids having 8 to 22 carbon atoms, and more preferably by fatty acids having 10 to 20 carbon atoms. The fatty acids may be saturated or unsaturated fatty acids, and in the case of unsaturated fatty acids, the number of double bonds between carbon atoms is not limited, and is exemplified as 1 to 4, preferably 1 to 3, and more preferably 1 or 2. Furthermore, the fatty acids may be linear or branched.

[0030] 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 containing these 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.

[0031] Although the polyoxyethylene constituting the polyoxyethylene fatty acid glyceryl is not limited to the present disclosure, examples thereof 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. The polyoxyethylene fatty acid glyceryl may be any fatty acid glyceryl in which at least one of 1 to 3 hydroxyl groups is ether-bonded to polyethylene glycol.

[0032] Although the present disclosure is not limited thereto, preferred examples of polyoxyethylene fatty acid glyceryl include polyoxyethylene glyceryl isostearate, polyoxyethylene glyceryl isoleate, 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, 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.

[0033] When the black solid topical composition of the present disclosure contains a surfactant, the content thereof is not limited as long as it does not impede the effects of the present disclosure, but is preferably 1 to 30% by mass, more preferably 3 to 25% by mass, and even more preferably 5 to 20% by mass, for example.

[0034] In addition, when the components described in (1) to (4) above also fall under any other component, in the present disclosure, the components described in (1) to (4) above are not included in the optional other component. Therefore, the contents of the components described in (1) to (4) above are not included in the contents of the optional component.

[0035] The black solid topical composition of the present disclosure preferably contains charcoal powder but does not contain black pigments such as carbon black or inorganic pigments (iron oxide, etc.), although it is not limited thereto. Preferably, the black solid topical composition of the present disclosure contains substantially no black components other than charcoal.

[0036] The black solid composition for external use of the present disclosure thus contains the charcoal having a particle size of 0.05 to 0.9 μm, the fatty acid etc. of (2), the liquid oil, and the solid oil of (4).

[0037] Although the black solid topical composition of the present disclosure is not limited thereto, one preferred embodiment is a black solid topical composition containing (1) charcoal, (2) fatty acid or the like, (3) liquid oil, (4) solid oil, and silica.

[0038] Although the black solid topical composition of the present disclosure is not limited thereto, one preferred embodiment is a black solid topical composition containing the charcoal (1), the fatty acid or the like (2), the liquid oil (3), the solid oil (4), and a surfactant.

[0039] Although the black solid topical composition of the present disclosure is not limited thereto, one preferred embodiment is a black solid topical composition containing (1) charcoal, (2) fatty acid or the like, (3) liquid oil, (4) solid oil, and at least one selected from the group consisting of silica, surfactants, and preservatives (phenoxyethanol, etc.).

[0040] The black solid topical composition of the present disclosure can be produced by mixing the components described in (1) to (4) above in the amounts described above, and optionally other components, according to a conventionally known method, and solidifying the mixture. The order in which the components described in (1) to (4) and other components are mixed is not particularly limited.

[0041] Although not limiting the present disclosure, a preferred example of the production method is mixing the mixture containing the charcoal (1) and the fatty acid (2) with the liquid oil (3) and the solid oil (4). Also, although not limiting the present disclosure, a preferred example of the production method is mixing the mixture containing the charcoal (1), the fatty acid (2), and the liquid oil (3) with the liquid oil (3) and the solid oil (4). Also, although not limiting the present disclosure, a preferred example of the production method is mixing the mixture containing the charcoal (1), the fatty acid (2), and the liquid oil (3I) with the liquid oil (3II) and the solid oil (4).

[0042] Examples of the liquid oil (3I) include at least one selected from the group consisting of cetyl ethylhexanoate, dodecane, ethylhexyl palmitate, ethylhexyl isopalmitate, isopropyl palmitate, isopropyl myristate, caprylic / capric triglyceride, isotridecyl isononanoate, triethylhexanoin, pentaerythristyl tetraethylhexanoate, octyldodecyl myristate, and triethylhexanoin.

[0043] Examples of the liquid oil (3II) include at least one selected from the group consisting of ethylhexyl palmitate, ethylhexyl isopalmitate, isopropyl palmitate, isopropyl myristate, caprylic / capric triglyceride, isotridecyl isononanoate, triethylhexanoin, pentaerythristyl tetraethylhexanoate, octyldodecyl myristate, and triethylhexanoin.

[0044] In these, the order of mixing the mixture with the liquid oil of (3) and the solid oil of (4) is not limited, and for example, the mixture may be mixed with the liquid oil of (3) and then with the solid oil of (4), the mixture may be mixed with the solid oil of (4) and then with the liquid oil of (3), the mixture may be mixed with a mixture containing the liquid oil of (3) and the solid oil of (4), or the mixture may be mixed with the liquid oil of (3) and the solid oil of (4) simultaneously. For example, the same explanation applies when the liquid oil of (3I) or (3II) is used as an example of the liquid oil of (3).

[0045] Furthermore, without limiting the present disclosure, taking as an example a case where a mixture containing the (1) charcoal, the (2) fatty acid, etc., and the (3) liquid oil (hereinafter sometimes referred to as "Mixture A") is mixed with the (3) liquid oil and the (4) solid oil, Mixture A preferably contains 0.1 to 20 parts by mass of the (2) fatty acid, etc. per part by mass of the (1) charcoal, more preferably 0.15 to 10 parts by mass, even more preferably 0.15 to 5 parts by mass, and particularly preferably 0.15 to 2 parts by mass. Furthermore, without limiting the present disclosure, in this case, Mixture A preferably contains 0.4 to 40 parts by mass of the (3) liquid oil per part by mass of the (1) charcoal, more preferably 0.8 to 24 parts by mass.

[0046] Furthermore, without limiting the present disclosure, for example, the amount of the liquid oil (3) blended into the mixture A is preferably exemplified as an amount that results in 0.05 to 5 mass % in the black solid topical composition of the present disclosure, more preferably 0.1 to 3 mass %, and even more preferably 0.2 to 1.5 mass %.

[0047] Among these, a more preferred example is that the entire amount of the charcoal (1) blended into the black solid external use composition of the present disclosure is blended into the mixture A. Also, a preferred example is that the liquid oil (3I) is included as the liquid oil (3) in the mixture A. Furthermore, when the liquid oil (3I) is included as the liquid oil (3) in the mixture A, the liquid oil (3) to be mixed with the mixture A is not particularly limited, but a more preferred example is that the liquid oil (3II) is used. Furthermore, while not limiting the present disclosure, a preferred example is that the entire amount of the fatty acids, etc. (2) and / or the entire amount of the liquid oil (3I) blended into the black solid external use composition of the present disclosure is blended into the mixture A. Furthermore, while not limiting the present disclosure, in the production of the black solid external use composition of the present disclosure, the optional other components may be blended at any stage.

[0048] The pH of the black solid composition for external use of the present disclosure is not limited as long as it has a pH that allows it to be used as an external preparation for application to the skin, etc.

[0049] The black solid topical composition of the present disclosure is thus solid and does not exhibit flowability at least at room temperature (25°C).

[0050] According to the black solid composition for external use of the present disclosure, a black solid composition for external use that is black, glossy (shiny), and has excellent stability can be obtained.

[0051] The black solid composition for external use of the present disclosure is black, but not a light black such as a black that is close to gray. Without being limited thereto, the black of the composition is a deep black (deep black), more preferably a black having an L value of 35 or less in the CIELAB color system measured with a spectrophotometer. As described in the Examples below, the black color is based on the L value (color difference) of SCI calculated by measuring SCI (Specular Component Include (including specular reflected light)) and SCE (Specular Component Exclude (excluding specular reflected light)) in the solid composition for external use using a color difference meter (spectrophotometer CM-2600d, manufactured by Konica Minolta Japan, Inc.), and the value is 35 or less. This conforms to the conditions of JIS Z 8722 (2009).

[0052] The black solid composition for external use of the present disclosure has a gloss (shiny appearance). Although not limited thereto, the gloss (shiny appearance) refers to the glossiness of the surface of the composition when viewed with the naked eye. Preferably, as in the Examples described below, SCI and SCE are measured using a color difference meter (same as above), and the value calculated from the difference in the L values ​​of SCI and SCE is 2 or more, more preferably 2.5 or more.

[0053] In addition, the black solid composition for external use of the present disclosure has good stability. In the present disclosure, stability refers to the suppression of precipitation of particles present in the composition. Although not limited thereto, this stability preferably refers to, for example, as described in the examples below, dissolving 50 g of a mixture containing the above-mentioned components in a water bath at 85 ° C, pouring the composition into a 100 mL glass beaker when the temperature of the composition reaches 80 ° C, allowing it to cool and solidify at room temperature (25 ° C) for 3 hours, and visually checking the presence and extent of charcoal precipitation at the bottom of the beaker, whereby no charcoal precipitation is observed at the bottom of the beaker.

[0054] As such, the black solid topical composition of the present disclosure is a black solid topical composition that is black, glossy (shiny), and has excellent stability.

[0055] While not limiting the present disclosure, a more preferred example of the black solid topical composition is one that has a specific hardness and scoopability (ease of scooping) to further improve usability. In this case, as described in the Examples below, the hardness is preferably exemplified by a rheometer hardness (hardness measured with a rheometer) of 50 to less than 1100, more preferably 100 to 1000, and even more preferably 150 to less than 900. In the present disclosure, the rheometer 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. Furthermore, in terms of ease of scooping (feeling of scooping), it is preferable that the scooping be of an average value of 1.5 or more and 3 or less, more preferably 2.3 or more and 3 or less, as evaluated according to the evaluation in the examples described below.

[0056] The black solid topical composition of the present disclosure is not limited insofar as it can be applied to the skin (including the scalp, mucous membranes, etc.) Preferred examples of the topical composition include cleansing compositions and washing compositions that can be used to remove skin stains such as sebum, sweat, dust, dirt in pores, foundation, lipstick, sunscreen, etc., and more preferably cleansing compositions.

[0057] The black solid topical composition of the present disclosure may be applied to the skin in the same manner as conventionally known topical compositions. Although not limited thereto, for example, the composition may be used by applying an appropriate amount as is, or by contacting the composition with a liquid such as water as needed and then sliding the composition over the skin. The amount of the black solid topical composition of the present disclosure to be applied to the skin and the number of uses are not particularly limited. For example, when used to remove skin stains, the composition may be used in the same manner as conventionally known cleansing agents or detergents. Furthermore, after application to the skin, the composition may be rinsed off with water, or may not be rinsed off, and may be wiped off with cotton or the like. [Example]

[0058] The present disclosure will be described in more detail below with reference to examples, but the present disclosure is not limited thereto.

[0059] Test Example 1 1A. Preparation of Compositions A solid composition for external use was prepared by mixing the components according to Table 1. Specifically, it was prepared according to the following procedure. 1) The ingredients marked A in the table were mixed uniformly while heating to about 90°C to obtain a mixture. 2) The mixture obtained by mixing the components B in the table was added to the mixture prepared in 1) above, and the mixture was mixed uniformly at 90°C. 3) To the mixture thus obtained, component C in the table was added and mixed uniformly at 90°C. 4) The mixture obtained in 3) above was filled into a jar container at 70°C while still in the molten state, and then allowed to cool to obtain solid topical compositions contained in jar containers (Examples 1-1 and 1-2, Comparative Examples 1-1 and 1-2).

[0060] 1B. Evaluation Procedure for Blackness, Shine, and Stability 50 g of each solid topical composition obtained as described above was dissolved in a water bath at 85°C. When the composition temperature reached 80°C, 1.5 g of the composition was poured into a metal dish and allowed to cool and solidify at room temperature (25°C) for 3 hours. The blackness and gloss were then evaluated using a color difference meter (spectrophotometer CM-2600d, manufactured by Konica Minolta Japan, Inc.). The color difference meter measured SCI (Specular Component Include (including specular reflected light)) and SCE (Specular Component Exclude (excluding specular reflected light)). The blackness was calculated from the L value (color difference) of SCI, and the gloss was calculated from the difference between the L values ​​of SCI and SCE. Evaluation was performed according to the following criteria.

[0061] <Blackness> 〇: SCI L value is 35 or less ×: SCI L value is higher than 35 In this evaluation, if the L value in the CIELAB color system measured with a spectrophotometer is 35 or less, the blackness can be evaluated as "deep," and the larger the value, the lighter the blackness is evaluated to be.

[0062] <Gloss> 〇: The difference in L value between SCI and SCE is 2 or more ×: The difference in L value between SCI and SCE is less than 2. In this evaluation, if the value is 2 or more, the gloss (glossiness) is high, and the smaller the value, the lower the gloss (glossiness) is evaluated to be.

[0063] 50 g of each solid topical composition obtained as described above was dissolved in a water bath at 85°C. When the temperature of the composition reached 80°C, the composition was poured into a 100 mL glass beaker and allowed to cool and solidify at room temperature for 3 hours. Thereafter, the presence or absence of charcoal precipitated at the bottom of the beaker was visually confirmed. Evaluation was performed according to the following criteria.

[0064] <Stability> ○: No charcoal deposits are observed on the bottom of the beaker ×: Charcoal deposits are observed on the bottom of the beaker

[0065] 1C.Results The results are shown in Table 1.

[0066] [Table 1]

[0067] As shown in Table 1, when charcoal with particle sizes of 0.2 μm or 0.5 μm was used (Examples 1-1 and 1-2), excellent results were obtained in terms of blackness, gloss, and stability. In contrast, when charcoal with larger particle sizes of 7 μm or 40 μm was used instead of using such small particle sizes (Comparative Examples 1-1 and 1-2), surprisingly, poor results were obtained in terms of blackness, gloss, and stability. From this, it can be said that the charcoal used in the Examples and Comparative Examples all share the same black color, but by incorporating charcoal with smaller particle sizes, such as 0.2 μm or 0.5 μm, a solid topical composition excellent in all respects of blackness, gloss, and stability was obtained. Furthermore, charcoal with smaller particle sizes is less uniformly dispersed and tends to settle more easily than charcoal with larger particle sizes, but a black solid composition with excellent stability was thus obtained.

[0068] In this test example, 50 g of the prepared solid topical composition was dissolved in a hot water bath, then solidified and evaluated, but the evaluation results essentially represent the evaluation results for the solid topical composition. The same applies hereinafter.

[0069] Test Example 2 2A. Preparation of Compositions Except for using the ingredients shown in Table 2, the ingredients were mixed in the same manner as in Test Example 1 to obtain solid external compositions (Example 2-1, Comparative Examples 2-1 and 2-2) contained in jars.

[0070] 2B. Evaluation Procedure for Darkness, Shine, and Stability The blackness, gloss and stability were evaluated in the same manner as in Test Example 1.

[0071] 2C.Results The results are shown in Table 2.

[0072] [Table 2]

[0073] As shown in Table 2, when charcoal is used, it is excellent in all of blackness, gloss, and stability. On the other hand, when iron oxide or carbon black is used instead of charcoal, the effects of blackness, gloss, and stability are lower than those of charcoal, and no good composition is obtained. From this, it is found that by using charcoal, a solid external composition that is good in all of blackness, gloss, and stability can be obtained.

[0074] Test Example 3 3A. Composition Preparation and Evaluation Procedures The components were thoroughly mixed in a mortar according to Table 3 below, and 9 g of the resulting mixture was placed in a glass screw tube and stirred until uniform. The mixtures thus obtained (Examples 3-1 to 3-6) were then allowed to stand at room temperature for 6 hours, and the state of charcoal separation was visually evaluated. The separation was evaluated according to the following criteria. The screw tube had a diameter of approximately 2 cm at the bottom, and the mixture was filled to a height of 3 cm from that diameter. 〇: Charcoal is uniformly dispersed and no separation is observed △: There are areas with little charcoal in the top third or more of the layer (charcoal settling is observed) ×: No charcoal is observed in the top third or more of the layer (more charcoal sedimentation is observed)

[0075] 3B.Results The results are shown in Table 3.

[0076] [Table 3]

[0077] As shown in Table 3, when polyhydroxystearic acid was used as the fatty acid or its polymer, or when hydroxystearic acid, palmitic acid, stearic acid, or oleic acid was used instead of polyhydroxystearic acid, charcoal was uniformly dispersed, demonstrating that charcoal could be stably dispersed (Examples 3-1 to 3-6). This demonstrates that charcoal can also be stably dispersed when fatty acids other than polyhydroxystearic acid or their polymers are used.

[0078] The mixture prepared in Test Example 3 can be considered to correspond to the mixture B shown in the table of Test Example 1, etc. In examining the black solid topical composition, the inventors found that the stability of the mixture B has a relatively large effect on the stability of the composition. Therefore, the high stability of the mixture B in the black solid topical composition of the present disclosure can be considered to indicate that the black solid topical composition also has high stability. Furthermore, such high stability can also be considered to suppress the imbalance of the components in the composition.

[0079] Test Example 4 4A. Preparation of Compositions Except for using the components shown in Table 4, the components were mixed in the same manner as in Test Example 1 to obtain solid external compositions (Examples 4-1 to 4-6, Comparative Examples 4-1 and 4-2) contained in jars.

[0080] 4B. Evaluation Procedure for Darkness, Shine, and Stability The blackness, gloss and stability were evaluated in the same manner as in Test Example 1.

[0081] 4C. Results The results are shown in Table 4.

[0082] [Table 4]

[0083] As shown in Table 4, when the amount of small particle size charcoal (particle size 0.2 μm) in the composition was 0.0125 mass% or less, good results were not obtained in at least two of the items of blackness, gloss, and stability (Comparative Examples 4-1 and 4-2). In contrast, when the amount of charcoal was increased further, all of the blackness, gloss, and stability were excellent (Examples 4-1 to 4-6). From this, it was found that by incorporating a certain proportion or more of small particle size charcoal, a solid external composition with good blackness, gloss, and stability could be obtained.

[0084] Test Example 5 5A. Preparation of Compositions Except for using the components shown in Table 5, the components were mixed in the same manner as in Test Example 1 to obtain solid external compositions (Examples 5-1 to 5-4) contained in jars.

[0085] 5B. Evaluation Procedure for Darkness, Shine, and Stability The blackness, gloss and stability were evaluated in the same manner as in Test Example 1.

[0086] 5C. Results The results are shown in Table 5.

[0087] [Table 5]

[0088] As shown in Table 5, all of Examples 5-1 to 5-4, in which the blending amounts of ethylhexyl palmitate and tri(caprylic / capric)glyceryl were changed, exhibited excellent blackness, gloss, and stability.

[0089] In addition, in Test Example 5, the feeling of use was also checked, and all compositions had a good feeling of use. Specifically, five expert panelists took 3 g of the composition prepared as described above, and slid the composition on the skin with their fingers, and evaluated the ease of spreading and thickness according to the following evaluation criteria. As a result, all compositions were rated as ○ for both ease of spreading and thickness. In this evaluation, the panelists previously compared the degree of ease of spreading and the degree of thickness to unify the standards.

[0090] <Evaluation criteria for stretchability> 3 points: Easy to spread on the skin 2 points: A little difficult to spread on the skin 1 point: Difficult to spread on the skin (cannot be spread without excessive force) When the average score calculated from the total points of the five panelists was 1 to less than 1.6, it was marked as ×; when it was 1.6 or more but less than 2.4, it was marked as △; when it was 2.4 or more but 3, it was marked as ○.

[0091] <Thickness evaluation criteria> 3 points: Feels thick 2 points: Feels a little thick 1 point: No feeling of thickness (feels like skin is rubbing against fingers, but no feeling of composition between skin and fingers) When the average score calculated from the total points of the five panelists was 1 to less than 1.6, it was marked as ×; when it was 1.6 or more but less than 2.4, it was marked as △; when it was 2.4 or more but 3, it was marked as ○.

[0092] Test Example 6 6A. Preparation of Compositions Except for using the components shown in Table 6, the components were mixed in the same manner as in Test Example 1 to obtain solid external compositions (Examples 6-1 to 6-3) contained in jars.

[0093] 6B. Hardness and Scoopability Evaluation Procedure In this test example, the hardness and scoopability of the solid topical compositions were evaluated according to the following criteria.

[0094] <Hardness> 50 g of the solid topical composition obtained as described above was dissolved in a water bath at 85°C. When the temperature of the solid topical composition reached 80°C, 8 g of the solid topical composition was poured into another jar and allowed to cool at room temperature (25°C) for 12 hours. Hardness was then measured. Hardness was measured using a rheometer (FUDOH Rheometer RTC-3002D, manufactured by LEOC Co., Ltd.) 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). Evaluation was performed according to the following criteria.

[0095] ○: Hardness is 150 or more and less than 900 △: Hardness is 50 or more but less than 150, or 900 or more but less than 1100 ×: Hardness less than 50 or 1100 or more

[0096] <Ease of scooping> Five expert panelists evaluated the ease of scooping 3 g of the solid external composition prepared as described above with a spatula in one go according to the following criteria.

[0097] 3 points: Easy to scoop out the appropriate amount (3g) 2 points: Hard, soft, or not cohesive enough (crumbly) that it is difficult to get the right amount 1 point: Hard, soft, or poorly packed, making it difficult to get the right amount

[0098] When the average score calculated from the total points of the five expert panelists was 1 or more but less than 1.5, it was marked as ×, when it was 1.5 or more but less than 2.3, it was marked as △, and when it was 2.3 or more but less than 3, it was marked as ○.

[0099] 6C.Results The results are shown in Table 6.

[0100] [Table 6]

[0101] As shown in Table 6, the solid topical compositions of Examples 6-1 to 6-3 all received a hardness evaluation score of ○. Furthermore, the solid topical compositions of Examples 6-1 to 6-3 were easy to scoop with a spatula and had a good feel when removed. Thus, the solid topical compositions of Examples 6-1 to 6-3 were found to be good solid topical compositions in that they had a moderately hard solid surface, and their interiors were also solid and easy to scoop. Furthermore, although not shown in the results, the black solid topical compositions of Examples 6-1 to 6-3 had the desired blackness, gloss, and stability. Furthermore, when the test was conducted using charcoal powder with a particle size of 0.7 μm in Examples 6-1 to 6-3, solid topical compositions with good hardness and feel when removed were also obtained. In this case, the compositions also had the desired blackness, gloss, and stability.

[0102] Test Example 7 7A. Composition Preparation, Hardness and Scoopability Evaluation Procedures In this test example, black solid external use compositions were prepared in the same manner as in Example 6-1 except for changing the content of solid oil (Examples 7-1 and 7-2). Hardness and scoopability were evaluated in the same manner as in Test Example 6.

[0103] 7B.Results The results are shown in Table 7.

[0104] [Table 7]

[0105] As shown in Table 7, even when the content of solid oil was changed, black solid external use compositions excellent in terms of hardness and ease of scooping were obtained. Furthermore, although not shown in the results, the solid external use compositions of Examples 7-1 and 7-2 also had the desired blackness, gloss, and stability, similar to Example 6-1.

[0106] Furthermore, the black solid compositions for external use described in the examples of Test Examples 1, 2, and 4 to 7 can be said to be compositions that can be used as cleansing compositions or washing compositions, and although not shown in the results, when used as a cleansing agent, they were able to sufficiently cleanse away dirt such as sebum, sweat, dust, dirt in pores, foundation, lipstick, and sunscreen.

Claims

1. (1) 0.02 to 10 mass% of charcoal having a particle size of 0.05 to 0.9 μm, (2) at least one selected from the group consisting of palmitic acid, stearic acid, isostearic acid, oleic acid, hydroxystearic acid, and polyhydroxystearic acid, in an amount of 0.1 parts by mass or more per part by mass of the charcoal; (3) 50 to 90% by mass of at least one liquid oil selected from the group consisting of ester oils and hydrocarbon oils, and (4) 3 to 10% by mass of at least one solid oil having a melting point of 60 to 120°C selected from the group consisting of Fischer-Tropsch wax, polyethylene wax, and microcrystalline wax A black solid composition for external use comprising:

2. 2. The black solid composition for external use according to claim 1, wherein the L value in the CIELAB color system measured with a spectrophotometer is 35 or less.

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