Black solid topical composition

Abstract

The object of this invention is to provide a black, glossy (luster-like) solid topical composition with excellent stability. The black solid topical composition of this invention contains (1) 0.02 to 10% by mass of char with a particle size of 0.05 to 0.9 μm, (2) at least one of the following selected from the group consisting of fatty acids and their polymers, in a proportion of 0.1 parts by mass or more per part by mass of the aforementioned char, (3) a liquid oil, and (4) a solid oil with a melting point of 40 to 120°C.

Description

Technical Field

[0001] This invention relates to a black solid-shaped external composition. Prior Technology

[0002] Currently, various topical products such as cleansers, facial cleansers, and lip balms are available on the market. When choosing a product from a variety of options, not only its effectiveness but also its appearance are important factors. For example, cleansers or facial cleansers can be used to effectively remove dirt caused by sebum or dust, as well as cosmetics adhering to the skin. Many solid or liquid cleansers and facial cleansers are known. As an example, a solid oil-based cleansing cosmetic has been reported, which is (A) a solid oil-based cleansing cosmetic containing 5 to 15% by mass of hydrocarbon oil with a melting point of 60 to 120°C in the total amount of the cosmetic, (B) a liquid oil containing more than 35% by mass of ester oil relative to the total amount of liquid oil, and (C) a solid oil-based cleansing cosmetic containing 5 to 30% by mass of a nonionic surfactant with an HLB value of 5 to 13 in the total amount of the cosmetic. It is revealed that this cleansing cosmetic does not drip, has good compatibility with cosmetics, and has excellent detergency (Patent Document 1). [Previous Technical Documents] [Patent Literature]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2012-206974 Summary of the Invention

[0004] [The problem the invention aims to solve] As mentioned above, various topical compositions are known, and the purpose of this disclosure is to provide a black solid topical composition that is black, glossy (glossy appearance), and has excellent stability. [Problem-solving methods]

[0005] During their in-depth investigation to solve the aforementioned problems, the inventors discovered that by combining (1) 0.02 to 10% by mass of char with a particle size of 0.05 to 0.9 μm, (2) at least one of the group consisting of fatty acids and their polymers, which is at least 0.1 parts by mass relative to each part by mass of the aforementioned char, (3) a liquid oil, and (4) a solid oil with a melting point of 40 to 120°C, a deep black, glossy (luster-like) solid external composition with excellent stability can be obtained. This invention was completed based on further research following this discovery. That is, this disclosure includes the invention disclosed below. Item 1. A black solid external composition comprising (1) 0.02 to 10% by mass of char with a particle size of 0.05 to 0.9 μm, (2) at least one of the group consisting of fatty acids and their polymers, which is at least 0.1 parts by mass per part by mass of the aforementioned char, (3) a liquid oil, and (4) a solid oil with a melting point of 40 to 120°C. Item 2. The black solid external composition as described in Item 1, wherein the L value in the CIELAB colorimetric system, as measured by a spectrophotometer, is 35 or less. Item 3. A black solid external composition as described in Item 1 or 2, wherein the fatty acid contained in the aforementioned component (2) has a carbon number of 14 to 20. Item 4. A black solid external composition as described in any one of items 1 to 3, wherein the content of the aforementioned component (4) is 2 to 25 by mass. Item 5. A black solid external composition as described in any one of items 1 to 4, wherein the content of the aforementioned component (3) is 20 to 97% by mass. [Invention Effects]

[0006] By formulating the above (1) to (4), a solid topical composition with a deep black color, gloss (glossy appearance) and excellent stability can be provided. Implementation

[0007] The following describes in more detail the implementation types included in this disclosure.

[0008] This disclosure comprises a black solid external composition containing (1) 0.02 to 10% by mass of char with a particle size of 0.05 to 0.9 μm, (2) at least one of the group consisting of fatty acids and their polymers, which is at least 0.1 parts by mass per part by mass of the aforementioned char, (3) a liquid oil, and (4) a solid oil with a melting point of 40 to 120°C.

[0009] The black solid external composition disclosed herein contains (1) 0.02 to 10% by mass of char with a particle size of 0.05 to 0.9 μm. This composition is not limited to this range; the char is preferably activated carbon, medicinal charcoal, bamboo charcoal, wood charcoal, etc., and more preferably activated carbon or medicinal charcoal. One type of charcoal may be used alone, or two or more types may be used in combination.

[0010] The particle size of the char is not limited to this range, but is preferably 0.08 to 0.8 μm, more preferably 0.1 to 0.7 μm. As mentioned above, this char is a powdered char with a very small particle size. Such powdered char can be used alone or in combination of two or more types. Furthermore, the particle size values ​​disclosed herein are based on the volume average particle size, and are values ​​that can be determined by laser diffraction / scattering. More specifically, they are values ​​determined by measuring the wet particle size distribution using a laser diffraction particle size analyzer, and are not presented as primary particle sizes.

[0011] In the black solid topical composition disclosed herein, the carbon content with a particle size of 0.05 to 0.9 μm is only required to be in the range of 0.02 to 10% by mass, preferably 0.03 to 5% by mass, and more preferably 0.07 to 2% by mass.

[0012] The black solid external formulation disclosed herein contains (2) at least one type (hereinafter also referred to as "fatty acids, etc.") selected from the group consisting of fatty acids and their polymers, in an amount of 0.1 parts by mass or more relative to each part by mass of the aforementioned carbon (carbon with 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. The fatty acid may be linear or branched, and may also be saturated or unsaturated. When it is an unsaturated fatty acid, the number of double bonds between carbon atoms is not limited, and may be, for example, 1 to 4, preferably 1 to 3, more preferably 1 or 2. The fatty acid may have substituents such as hydroxyl groups; examples of such fatty acids include hydroxy fatty acids, and examples of hydroxystearic acid include hydroxyacetic acid. The polymer of the fatty acid may be a polymer of any of these fatty acids. The degree of polymerization is not limited as long as the effects disclosed herein are achieved; the degree of polymerization (average degree of polymerization) is preferably 1 to 10, more preferably 2 to 8.

[0013] While this disclosure is not limited to this scope, examples of fatty acids and their polymers preferably include palmitic acid, stearic acid, isostearic acid, oleic acid, hydroxystearic acid, and polyhydroxystearic acid. One fatty acid or polymer may be used alone or in combination of two or more. While not limiting the scope of this disclosure, these are commercially available and examples include: NAA-142, NAA-173K, NAA-160 (Nippon Oil Co., Ltd.), isostearic acid EX (Advanced Alcohols Industries, Ltd.), oleic acid D-100 (New Nippon Rikka Co., Ltd.), 12-hydroxystearic acid (Ito Oil Co., Ltd.), and HS OLIGOMER 600 (Nikko Chemical Co., Ltd.).

[0014] In the black solid topical composition disclosed herein, the content of at least one of the fatty acids and their polymers is limited to at least 0.1 parts by mass per part by mass of the aforementioned char (char with a particle size of 0.05 to 0.9 μm), 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 even more preferably 0.15 to 2 parts by mass.

[0015] The black solid topical composition disclosed herein contains (3) a liquid oil. In this disclosure, liquid oil refers to an oil that is liquid at room temperature (25°C). There are no limitations on the type of liquid oil, as long as the effects of this disclosure are achieved. Examples include ester oils, hydrocarbon oils, animal and vegetable oils, organosilicone oils (or silicone oils), and higher alcohols, with preferred examples being ester oils, animal and vegetable oils, and hydrocarbon oils. One type of liquid oil may be used alone, or two or more may be used in combination.

[0016] While not limiting the scope of this disclosure, examples of liquid oils include ethylhexyl palmitate, ethylhexyl isopalmitate, isopropyl palmitate, isopropyl myristate, triglycerides (caprylic / capric), hexadecyl ethylhexanoate, isotrexate (isotridecyl isononanoate), neopentyl tertetrol tetraethylhexanoate, octyl dodecyl myristate, diisostearyl malate, triethylhexanoate, and cyclohexane-1,4-dicarboxylic acid diethoxydiethylene glycol esters; mineral oil, undecyl, and dodecyl... Hydrocarbon oils such as alkanes, tridecane, liquid paraffin, liquid isoparaffin, squalane, α-olefin oligomers, 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 such as dimethyl polysiloxane and dimethicone (chain-like, cyclic, and modified organosilicon); and higher alcohols such as lauryl alcohol, oleyl alcohol, and isostearyl alcohol. These liquid oils can be used alone or in combination of two or more.

[0017] While not limiting the scope of this disclosure, examples of liquid oils include those containing at least one selected from the group consisting of ester oils and hydrocarbon oils, or those containing at least one selected from the group consisting of ester oils, hydrocarbon oils, and animal and vegetable oils. Furthermore, it is even more preferred that the black solid topical composition disclosed herein is a liquid oil containing at least one selected from the group consisting of hexadecane ethylhexanoate, dodecane, ethylhexyl palmitate, ethylhexyl isopalmitoate, isopropyl palmitate, isopropyl myristate, triglycerides (caprylic / capric), isotriadecane isononanoate, neopentyl tetraethylhexanoate, octyl dodecane myristate, and triglycerides (ethylhexanoate).

[0018] In the black solid external composition disclosed herein, the content of component (3) is not limited as long as the effect disclosed herein can be obtained, but the content of component (3) is preferably 20 to 97% by mass, more preferably 30 to 95% by mass, and even more preferably 50 to 90% by mass.

[0019] Furthermore, while not limiting the scope of this disclosure, as an example, in the black solid topical composition disclosed herein, the content of the ester oil as component (3) can be made to be 17 to 97% by mass, more preferably 28 to 95% by mass, and even more preferably 48 to 90% by mass. Furthermore, while not limiting the scope of this disclosure, as an example, in the black solid topical composition disclosed herein, when the content of component (3) is 20 to 97% by mass, the content of the ester oil in the composition can 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 can be 48 to 90% by mass, and the content can also be appropriately set considering the aforementioned numerical ranges, etc.

[0020] The black solid topical composition disclosed herein contains (4) a solid oil with a melting point of 40 to 120°C. The solid oil is not limited to this range, but is preferably a solid oil with a melting point of 50 to 100°C, more preferably a solid oil with a melting point of 60 to 95°C, particularly preferably a solid oil with a melting point of 65 to 90°C, and even more preferably a solid oil with a melting point of 70 to 90°C. Component (4) is solid at room temperature (25°C) as described above.

[0021] As for this ingredient (4), there are no limitations as long as the effects disclosed herein can be achieved. Examples include paraffin wax, polyethylene wax, ethylene / propylene copolymer, microcrystalline wax, ceresin wax, FT synthetic wax (Fishertropsh wax), ceresin wax (Ozokerite wax) and other hydrocarbon waxes, candelilla wax, rice wax, beeswax, carnauba wax, hydrogenated jojoba oil, hardened oil, organosilicon wax, higher alcohols, etc. One of these ingredients may be used alone, or two or more may be used in combination.

[0022] While not limiting the scope of this disclosure, ingredient (4) is available commercially, and examples include: MULTI WAX X-445 (Sonneborn), PMWAX82, Hi-Mic-1070 (Nippon Fine Wax Co., Ltd.), CireWax80, CireWax90 (Cirebelle Fine Chemicals Pty Ltd.), Micropoly204 (Micro Powders, Inc.), Sasolwax C80 (Sasol), PERFORMALENE PL, PERFORMALENE 500, PERFORMALENE 655 (NEW PHASE TECHNOLOGIES), NJWax (Nikko Rika Co., Ltd.), NC-1630, refined carnauba wax (Cerarica Co., Ltd.), and beeswax gold (Miki Chemical Industry Co., Ltd.).

[0023] In the black solid external composition disclosed herein, the content of component (4) is not limited as long as the effect disclosed herein can be obtained, but in the composition, it is preferably 2 to 25% by mass, more preferably 3 to 15% by mass, and even more preferably 4 to 10% by mass.

[0024] The black solid topical composition disclosed herein may further contain any other pharmaceutically or cosmetically permissible ingredients, to the extent that it does not impair the effects disclosed herein. Examples of such other ingredients include various ingredients previously known to be used in topical agents such as cleansers and facial washes. Examples of such ingredients include silicon dioxide, surfactants (nonionic surfactants, cationic surfactants, anionic surfactants, amphoteric surfactants, etc.), base agents, moisturizing ingredients, anti-inflammatory ingredients, whitening ingredients, fragrances, colorants, cooling agents, antioxidants, preservatives, thickeners, emulsifiers, pH adjusters, enzymes, natural extracts such as animal / plant extracts, and vitamins. These ingredients can be appropriately selected according to the purpose, and may be used alone or in combination of two or more, with the dosage also appropriately determined.

[0025] While this disclosure is not limited to this scope, when silica is exemplified as another component, fumed silica can be exemplified as silica. Although not limiting this disclosure, when describing fumed silica, fumed silica is also referred to as fine amorphous silica (fumed silica), which can be conventionally hydrophobically treated silica such as dimethyldichlorosilane or hexamethyldisilazane. There are no limitations on the formulation of fumed silica in this disclosure as long as the effects of this disclosure are not compromised; however, 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. Fumed silica is commercially available, for example, trade name Aerosil 200 (Aerosil Japan). One type can be used alone, or two or more types can be used in combination. The particle size refers to the average particle size, which is determined according to the measurement method described in the trade name Aerosil (Aerosil Japan). Regarding the particle size of smoky silicon dioxide, it refers to the average particle size of the primary particles.

[0026] When the black solid topical composition disclosed herein contains silicon dioxide, its content is not limited to the extent that it does not impair the effects of the present disclosure. However, it can be exemplified that the content of silicon dioxide in the composition is 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.

[0027] Furthermore, while not limiting the scope of this disclosure, when illustrating surfactants as other components, examples may include nonionic surfactants, cationic surfactants, anionic surfactants, amphoteric surfactants, etc. In this disclosure, nonionic surfactants and anionic surfactants are preferred examples of surfactants, and nonionic surfactants are even more preferred. Furthermore, while there are no limitations within this scope, surfactants with an HLB value of 5 to 13 are preferred examples, and HLB values ​​of 6 to 12 are even more preferred. The HLB (Hydrophile Lypophile Balance) value is a well-known indicator of the balance between hydrophilicity and lipophilicity. HLB values ​​range from 0 to 20, indicating that a smaller HLB value indicates stronger lipophilicity, and a larger HLB value indicates stronger hydrophilicity. In this disclosure, HLB is generally calculated according to the Griffin formula. Any of these surfactants may be used alone or in combination.

[0028] While not limiting the scope of this disclosure, examples of nonionic surfactants include polyoxyethylene fatty acid glycerides, polyglycerol, and dehydrated sorbitol sesquioleate.

[0029] For example, the fatty acids constituting polyoxyethylene ethyl fatty acid glycerides are not limited to those disclosed herein, but preferably include fatty acids with 8 to 22 carbon atoms, more preferably include fatty acids with 10 to 20 carbon atoms. These fatty acids can be saturated or unsaturated. When unsaturated, the number of double bonds between carbon atoms is not limited, for example, 1 to 4, preferably 1 to 3, and more preferably 1 or 2. Furthermore, these fatty acids can be linear or branched.

[0030] The fatty acids constituting polyoxyethylene fatty acid glycerides are not limited to those disclosed herein, but may include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, linolenic acid, alpha-linolenic acid, behenic acid, etc., as well as natural fatty acids containing these fatty acids, such as coconut oil fatty acids or palm oil fatty acids. These fatty acids may be used alone or in combination of two or more.

[0031] The polyoxyethyl group constituting the polyoxyethyl fatty acid glyceride is not limited to that disclosed herein, but the average addition mole number of ethylene oxide (EO) is preferably about 5 to 60, more preferably about 10 to 40. Furthermore, the polyoxyethyl fatty acid glyceride is only required to be a polyoxyethyl fatty acid glyceride in which at least one of the 1 to 3 hydroxyl groups is bonded to the polyethylene glycol ether.

[0032] The polyoxyethylene ethyl fatty acid glycerides are not limited to those disclosed herein. Preferred examples include polyoxyethylene ethyl isostearate, polyoxyethylene ethyl isoleate, and polyoxyethylene diisolaurate glycerides having the aforementioned average addition mole number of ethylene oxide (EO). More preferred examples include triisostearate PEG-10 glycerides, triisostearate PEG-20 glycerides, triisostearate PEG-10 glycerides, and isostearate PEG-10 glycerides. In this disclosure, polyoxyethylene ethyl fatty acid glycerides may be used alone or in combination of two or more.

[0033] When the black solid topical composition disclosed herein contains a surfactant, its content is not limited as long as it does not impair the effect of the present invention. It is preferably 1 to 30% by mass, more preferably 3 to 25% by mass, and even more preferably 5 to 20% by mass.

[0034] Furthermore, when the ingredients described in (1) to (4) above also conform to other arbitrary ingredients, in this disclosure, the ingredients described in (1) to (4) above are not included in other arbitrary ingredients. Therefore, the content of the ingredients described in (1) to (4) above is not included in the content shown in the arbitrary ingredients.

[0035] While there are no limitations within the scope of the black solid topical composition disclosed herein, it is preferred that it contains carbon powder and does not contain carbon black, inorganic pigments (such as iron oxide), or other black pigments. Furthermore, it is even more preferred that it substantially does not contain any black components other than carbon.

[0036] The black solid topical composition disclosed herein contains the aforementioned carbon with a particle size of 0.05 to 0.9 μm, the aforementioned fatty acids (2), the aforementioned liquid oil, and the aforementioned solid oil (4).

[0037] While there are no limitations on the scope of the black solid topical composition disclosed herein, as an embodiment, a preferred example is a black solid topical composition containing the aforementioned (1) carbon, the aforementioned (2) fatty acids, the aforementioned (3) liquid oil, the aforementioned (4) solid oil, and silicon dioxide.

[0038] The black solid topical composition disclosed herein is not limited within this scope, but as an embodiment, it is preferably an example of a black solid topical composition containing the aforementioned (1) charcoal, the aforementioned (2) fatty acids, the aforementioned (3) liquid oil, the aforementioned (4) solid oil and surfactant.

[0039] The black solid topical composition disclosed herein is not limited within this scope, but as an embodiment, it is preferably exemplified as a black solid topical composition containing the aforementioned (1) charcoal, the aforementioned (2) fatty acids, the aforementioned (3) liquid oil, the aforementioned (4) solid oil, and at least one selected from the group consisting of silicon dioxide, surfactants and preservatives (such as phenoxyethanol).

[0040] The black solid external formulation disclosed herein is manufactured by mixing and solidifying the components described in (1) to (4) above, and any other components as needed, in the aforementioned amounts according to conventional methods. There are no particular restrictions on the mixing order of the components described in (1) to (4) and other components.

[0041] While not limiting the scope of this disclosure, this manufacturing method preferably includes mixing a mixture containing the char (1) and the fatty acids (2) mentioned above, the liquid oil (3) mentioned above, and the solid oil (4) mentioned above. Furthermore, while not limiting the scope of this disclosure, this manufacturing method preferably includes mixing a mixture containing the char (1) mentioned above, the fatty acids (2) mentioned above, and the liquid oil (3) mentioned above, the liquid oil (3) mentioned above, and the solid oil (4) mentioned above. Furthermore, while not limiting the scope of this disclosure, this manufacturing method preferably includes mixing a mixture containing the char (1) mentioned above, the fatty acids (2) mentioned above, and the liquid oil (3I) mentioned below, and the liquid oil (3II) mentioned below, and the solid oil (4) mentioned above.

[0042] As a liquid oil of (3I), examples include at least one selected from the group consisting of hexadecane ethylhexanoate, dodecane, ethylhexyl palmitate, ethylhexyl isopalmitoate, isopropyl palmitate, isopropyl myristate, triglycerides (caprylic / capric), isotriadecane isononanoate, neopentyl tetraethylhexanoate, octyl dodecanoate myristate, and triglycerides (ethylhexanoate).

[0043] As a liquid oil of (3II), examples include at least one selected from the group consisting of ethylhexyl palmitate, ethylhexyl isopalmitate, isopropyl palmitate, isopropyl myristate, triglycerides (caprylic / capric), isotriadecyl isononanoate, neopentyl tetraethylhexanoate, octyl dodecyl myristate and triglycerides (ethylhexanoate).

[0044] In these cases, there is no restriction on the mixing order of the aforementioned mixture, the liquid oil of (3) and the solid oil of (4). For example, the aforementioned mixture can be mixed with the liquid oil of (3) and then mixed with the solid oil of (4); the aforementioned mixture can be mixed with the solid oil of (4) and then mixed with the liquid oil of (3); the aforementioned mixture can be mixed with a mixture containing the liquid oil of (3) and the solid oil of (4); or the aforementioned mixture, the liquid oil of (3) and the solid oil of (4) can be mixed simultaneously. For example, when using the liquid oil of (3I) or (3II) as one example of the liquid oil of (3), the same explanation can be made.

[0045] Furthermore, although not limiting the present disclosure, when describing a mixture containing the aforementioned (1) char, the aforementioned (2) fatty acids, etc., and the aforementioned (3) liquid oil (hereinafter also referred to as mixture A), or a mixture of the aforementioned (3) liquid oil and the aforementioned (4) solid oil, as an example, it is preferable that mixture A contains 0.1 to 20 parts by mass of the aforementioned (2) fatty acids, etc., relative to 1 part by mass of the aforementioned (1) char, 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, although not limiting the present disclosure, in this case, it is preferable that mixture A contains 0.4 to 40 parts by mass of the aforementioned (3) liquid oil, more preferably 0.8 to 24 parts by mass, relative to 1 part by mass of the aforementioned (1) char.

[0046] Furthermore, although not limiting the present disclosure, for example, the amount of the liquid oil of the aforementioned (3) in the aforementioned mixture A is preferably 0.05 to 5% by mass in the black solid external composition of the present disclosure, more preferably 0.1 to 3% by mass, and even more preferably 0.2 to 1.5% by mass.

[0047] A preferred embodiment is that the total amount of the charcoal (1) mentioned above, which is incorporated into the black solid topical composition disclosed herein, is incorporated into the mixture A. Furthermore, the liquid oil (3) mentioned above, which is incorporated into the mixture A, is preferably the liquid oil (3I) mentioned above. Furthermore, when the liquid oil (3I) mentioned above is incorporated into the mixture A as the liquid oil (3), there are no particular limitations on the mixture A and the liquid oil (3) mixed therein; a preferred example is the use of the liquid oil (3II) mentioned above. Furthermore, while not limiting the scope of this disclosure, it is preferable to incorporate the total amount of the fatty acids (2) mentioned above and / or the liquid oil (3I) mentioned above, which are incorporated into the black solid topical composition disclosed herein, into the mixture A. Furthermore, while not limiting the scope of this disclosure, the aforementioned optional other components may be incorporated at any stage in the manufacture of the black solid topical composition disclosed herein.

[0048] The pH of the black solid topical composition disclosed herein is not limited as long as it has a pH value suitable for use as a skin topical agent.

[0049] The black solid external composition disclosed herein is of this solid form and does not exhibit fluidity at least at room temperature (25°C).

[0050] According to the black solid external composition disclosed herein, a black solid external composition with gloss (glossiness) and excellent stability can be obtained.

[0051] The black solid external component disclosed herein is black, not a light black close to grayish-black. While not limited to this range, the black of this component is a deep black (high blackness), preferably a black with an L value of 35 or less in the CIELAB colorimetric system as measured by a spectrophotometer. As described in the embodiments below, this black is based on the L value (color difference) of the SCI (Specular Component Include) and SCE (Specular Component Exclude) in the solid external component, calculated using a colorimeter (CM-2600d spectrophotometer, manufactured by Konica Minolta Co., Ltd., Japan), and this value is 35 or less. This measurement is performed according to the conditions of JIS Z 8722 (2009).

[0052] The black solid external composition disclosed herein has a gloss (glossiness). Although not limited to this scope, the gloss (glossiness) refers to the glossiness of the surface when the composition is viewed visually. Preferably, as in the embodiments described later, the SCI and SCE are measured using a colorimeter (same as described above), and the value calculated from the difference of the L values ​​of the SCI and SCE is 2 or more, more preferably 2.5 or more.

[0053] Furthermore, the black solid topical composition disclosed herein exhibits good stability. Stability in this disclosure refers to the inhibition of precipitation of particles present in the composition. While not limited to this scope, the better stability is exemplified by, for instance, in the following embodiment, dissolving 50g of a mixture containing the aforementioned components in a hot water bath at 85°C, pouring the composition into a 100mL glass beaker when the temperature of the composition reaches 80°C, and allowing it to cool and solidify at room temperature (25°C) for 3 hours. Visual inspection reveals no char precipitation at the bottom of the beaker.

[0054] As described above, the black solid topical composition disclosed herein is a black, glossy (glossy) black solid topical composition with excellent stability.

[0055] Furthermore, while not limiting the scope of this disclosure, from the viewpoint of further improving usability, the black solid external packaging composition is preferably an example of a black solid external packaging composition possessing specific hardness and ease of removal (feel of attainment). In this case, as in the embodiments described later, the hardness is preferably in the range of 50 to less than 1,100 using a rheometer (hardness measured by a rheometer), more preferably 100 to 1,000, and even more preferably 150 or higher but less than 900. In this disclosure, the rheometer hardness is measured using a Rheometer (FUDOH Rheometer-RTC-3002D, manufactured by LEOC Corporation), using a flat 10φ (diameter) adapter, at a table speed of 30 cm per minute, a penetration depth of 5 mm, a range of 2 kJ, and a measurement temperature of 25°C. Furthermore, a better retrieval rate (sense of attainment) is exemplified by having a retrieval ease of 1.5 to 3 or less on average in the evaluation according to the embodiments described below, and more preferably having a retrieval ease of 2.3 to 3 or less.

[0056] The black solid topical composition disclosed herein is not limited in its applicability to the skin (including the scalp, mucous membranes, etc.). Preferably, examples of such topical composition include cleaning compositions and washes that can be used to remove skin impurities such as sebum, sweat, dust, pore dirt, foundation, lipstick, and sunscreen; more preferably, examples include cleaning compositions.

[0057] The black solid topical composition disclosed herein can be applied to the skin in the same way as conventional topical compositions. It is not limited to this; for example, an appropriate amount of the composition can be applied directly to the skin, or, as needed, it can be mixed with a liquid such as water and applied. There are no particular limitations on the amount or frequency of application of the black solid topical composition disclosed herein. For example, when used to remove dirt from the skin, it can be used in the same way as conventional cleansers or detergents. Furthermore, after application to the skin, the composition can be rinsed off with water; alternatively, it can be applied without rinsing and wiped off with cotton or similar materials. [Example]

[0058] The following is an illustration to illustrate this disclosure in more detail, but this disclosure is not limited to these scopes.

[0059] Experimental Example 1 1A. Modulation of components The components are mixed according to Table 1 below to prepare a solid topical formulation. Specifically, the formulation is prepared according to the following procedure. 1) Heat component A in the table to about 90°C and mix it evenly to obtain a mixture. 2) Add the mixture obtained by mixing components B in the table to the mixture prepared in 1) above, and mix evenly at 90°C. 3) Add component C from the table to the mixture thus obtained, and mix thoroughly at 90°C. 4) The mixture obtained in 3) above is directly filled into a jar container in a molten state at 70°C and then cooled to obtain a solid external composition in the jar container (Examples 1-1 and 1-2, Comparative Examples 1-1 and 1-2).

[0060] 1B. Evaluation procedure for blackness, gloss and stability 50g of each of the aforementioned solid external components was dissolved in a hot water bath at 85°C. When the temperature of the component reached 80°C, 1.5g of the component was poured into a metal dish and allowed to cool and solidify at room temperature (25°C) for 3 hours. Then, the blackness and gloss were evaluated using a colorimeter (CM-2600d spectrophotometer, manufactured by Konica Minolta Inc., Japan). In the colorimeter, SCI (Specular Component Include) and SCE (Specular Component Exclude) were measured. Blackness was determined by the L value (color difference) of SCI, and gloss was calculated from the difference between the individual L values ​​of SCI and SCE. The evaluation was performed according to the following criteria.

[0061] <Blackness> 〇: The L value of SCI is below 35 ×: The L value of SCI is higher than 35 In this assessment, as long as the L value of the CIELAB color system measured by a spectrophotometer is below 35, the blackness can be rated as "deep". The higher the value, the lighter the blackness.

[0062] <Gloss> 〇: The difference between the L values ​​of SCI and SCE is 2 or more. ×: The difference in L values ​​between SCI and SCE is less than 2. In this rating, a value of 2 or higher indicates high gloss (glossiness), while a smaller value indicates lower gloss (glossiness).

[0063] Dissolve 50g of each of the solid external formulations obtained as described above in a hot water bath at 85°C. When the temperature of the formulation reaches 80°C, pour the formulation into a 100mL glass beaker and allow it to cool and solidify at room temperature for 3 hours. Then, visually inspect the bottom of the beaker for any precipitated carbon. Evaluate according to the following criteria.

[0064] <Stability> 〇: No carbon sediment is visible at the bottom of the beaker. ×: Carbon deposits can be seen at the bottom of the beaker.

[0065] 1C. Result The results are presented in Table 1.

[0066] [Table 1]

[0067] As shown in Table 1, when using charcoal with particle sizes of 0.2 μm and 0.5 μm (Examples 1-1, 1-2), excellent blackness, gloss, and stability were observed. In contrast, when using charcoal with particle sizes of 7 μm or even up to 40 μm (Comparative Examples 1-1, 1-2), surprisingly, no good results were obtained in terms of blackness, gloss, and stability. This indicates that while the charcoal used in the examples and comparative examples is black, by formulating charcoal with small particle sizes such as 0.2 μm and 0.5 μm, solid external compositions with excellent blackness, gloss, and stability in all aspects can be obtained. Furthermore, small-particle-size charcoal is more difficult to disperse uniformly than large-particle-size charcoal, and although it tends to precipitate easily, this results in a black solid composition with excellent stability.

[0068] In this experimental example, 50g of the prepared solid topical composition was dissolved in a hot water bath, then cured and evaluated. The evaluation result substantially reflects the evaluation result of the solid topical composition. The same applies below.

[0069] Experimental Example 2 2A. Modulation of components In addition to using the ingredients shown in Table 2, the ingredients were mixed in the same manner as in Test Example 1 above to obtain solid external compositions packaged in cans (Examples 2-1, Comparative Examples 2-1 and 2-2).

[0070] 2B. Evaluation procedure for blackness, gloss and stability The same procedure as in Example 1 was used to evaluate blackness, gloss, and stability.

[0071] 2C. Result The results are presented in Table 2.

[0072] [Table 2]

[0073] As shown in Table 2, when charcoal is used, the blackness, gloss, and stability are all excellent. In contrast, when iron oxide or carbon black is used instead of charcoal, the blackness, gloss, and stability are all lower than when charcoal is used, and a good composition cannot be obtained. Therefore, it can be seen that using charcoal can yield a solid topical composition with excellent blackness, gloss, and stability.

[0074] Experimental Example 3 3A. Preparation and evaluation procedures for components According to Table 3 below, the components were thoroughly mixed in a mortar. 9g of the resulting mixture was placed in a glass spiral tube and stirred until homogeneous. Then, the resulting mixture (Examples 3-1 to 3-6) was left to stand at room temperature for 6 hours to visually evaluate the separation of char. The evaluation of the separation was performed according to the following criteria. The bottom diameter of the spiral tube was approximately 2cm, and the mixture was filled from the bottom to a height of 3cm. 〇: The carbon system is uniformly dispersed, and no separation was observed. △: From the top 1 / 3 or above, a small amount of carbon can be seen (carbon sedimentation can be observed). ×: No carbon was visible in the upper 1 / 3 of the layer (more carbon sedimentation was observed).

[0075] 3B. Result The results are presented in Table 3.

[0076] [Table 3]

[0077] As shown in Table 3, when polyhydroxystearic acid is used as a fatty acid or its polymer, and even when hydroxystearic acid, palmitic acid, stearic acid, or oleic acid are used to replace polyhydroxystearic acid, the char can be uniformly dispersed and the char can be stably dispersed (Examples 3-1 to 3-6). Therefore, it can be seen that even when fatty acids other than polyhydroxystearic acid or their polymers are used, the char can be stably dispersed.

[0078] Furthermore, the mixture prepared in Example 3 of this study can be considered equivalent to mixture B shown in the table of Example 1 above. In exploring black solid topical compositions, the inventors found that the stability of mixture B has a relatively large impact on the stability of the composition. Therefore, in the black solid topical composition disclosed herein, the high stability of mixture B indicates that high stability can also be obtained in the black solid topical composition. Moreover, such high stability also suppresses deviations in the composition's components.

[0079] Test Example 4 4A. Modulation of components In addition to using the ingredients presented in Table 4, the ingredients were mixed in the same manner as in Test Example 1 above to obtain solid external compositions packaged in cans (Examples 4-1 to 4-6, Comparative Examples 4-1 and 4-2).

[0080] 4B. Evaluation procedure for blackness, gloss and stability The same procedure as in Example 1 was used to evaluate blackness, gloss, and stability.

[0081] 4C. Result The results are presented in Table 4.

[0082] [Table 4]

[0083] As shown in Table 4, when the amount of small-particle-size char (0.2 μm) in the composition is 0.0125% by mass or less, at least two of the following properties—blackness, gloss, and stability—fail to yield satisfactory results (Comparative Examples 4-1 and 4-2). In contrast, when the amount of char is greater, all of the following properties—blackness, gloss, and stability—are excellent (Examples 4-1 to 4-6). Therefore, it can be seen that by incorporating small-particle-size char at a certain ratio or higher, a solid-state topical composition with good blackness, gloss, and stability can be obtained.

[0084] Experimental Example 5 5A. Modulation of components In addition to using the ingredients presented in Table 5, the ingredients were mixed in the same manner as in Test Example 1 above to obtain solid external compositions packaged in cans (Examples 5-1 to 5-4).

[0085] 5B. Evaluation procedure for blackness, gloss and stability The same procedure as in Example 1 was used to evaluate blackness, gloss, and stability.

[0086] 5C. Result The results are presented in Table 5.

[0087] [Table 5]

[0088] As shown in Table 5, in any of Examples 5-1 to 5-4 where the blending amounts of ethylhexyl palmitate and triglycerides (caprylic / capric) were varied, the blackness, gloss, and stability were all excellent.

[0089] Furthermore, in Experiment 5, when further confirming the user experience, all components demonstrated a good user experience. Specifically, the user experience was assessed by five reviewers who took 3g of the aforementioned prepared components, applied them to their skin with their fingers, and evaluated the ease of application and thickness according to the following evaluation criteria. The results showed that the ease of application and thickness of any component were both zero. In the evaluation, the ease of application and thickness were compared among the reviewers beforehand to standardize the criteria.

[0090] <Ease of application assessment criteria> 3 points: Easy to apply to skin 2 points: Slightly difficult to apply to the skin 1 point: Difficult to apply to the skin (difficult to apply without applying pressure) The average score calculated from the total scores of the 5 judges is set as follows: 1 to less than 1.6 is marked as ×, 1.6 or higher but less than 2.4 is marked as △, and 2.4 or higher but less than 3 is marked as ○.

[0091] <Thickness Evaluation Criteria> 3 points: I could feel the thickness 2 points: Feels a bit thick 1 point: Cannot feel thickness (cannot feel the friction between skin and fingers, cannot feel the components between skin and fingers) The average score calculated from the total scores of the 5 judges is set as follows: 1 to less than 1.6 is marked as ×, 1.6 or higher but less than 2.4 is marked as △, and 2.4 or higher but less than 3 is marked as ○.

[0092] Experimental Example 6 6A. Modulation of components In addition to using the ingredients presented in Table 6, the ingredients were mixed in the same manner as in Test Example 1 above to obtain a solid external composition packaged in a can (Examples 6-1 to 6-3).

[0093] 6B. Evaluation procedure for hardness and ease of extraction In this test example, the hardness and ease of removal of the solid-shaped external component were evaluated according to the following criteria.

[0094] <Hardness> 50g of the aforementioned solid external composition was dissolved in a hot water bath at 85°C. When the temperature of the solid external composition reached 80°C, 8g of the solid external composition was poured into another container and cooled at room temperature (25°C) for 12 hours. The hardness was then measured. Hardness was determined 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. The evaluation was conducted according to the following criteria.

[0095] 〇: Hardness is above 150 but below 900 △: Hardness is 50 or higher but less than 150, or 900 or higher but less than 1,100. ×: Hardness not reaching 50 or above 1,100

[0096] <Ease of extraction> The following criteria were used to assess the ease of scooping out 3g of the aforementioned solid external component when 5 judges used a scraper to remove it in one go.

[0097] 3 points: Easy to scoop out an appropriate amount (3g) 2 points: Slightly difficult to remove an appropriate amount due to its hardness, softness, or loose (loose) texture. 1 point: Unable to extract the appropriate amount due to its hardness, softness, or loose (loose) texture.

[0098] The average of the scores from the five judges is set as follows: × if the average is 1 or higher but less than 1.5; △ if the average is 1.5 or higher but less than 2.3; and ○ if the average is 2.3 or higher but less than 3.

[0099] 6C. Result The results are presented in Table 6.

[0100] [Table 6]

[0101] As shown in Table 6, the hardness rating of the solid-shaped external compositions of Examples 6-1 to 6-3 was ○. Furthermore, the solid-shaped external compositions of Examples 6-1 to 6-3 were easy to scrape with a spatula, providing a good tactile experience. Therefore, the solid-shaped external compositions of Examples 6-1 to 6-3 are good solid-shaped external compositions with a moderately hard surface, and also a solid interior that is easy to extract. Although not shown in the results, the black solid-shaped external compositions of Examples 6-1 to 6-3 possessed the desired blackness, gloss, and stability. Furthermore, even when the carbon powder with a particle size of 0.7 μm was used in Examples 6-1 to 6-3, solid-shaped external compositions with good hardness and tactile experience were still obtained. In addition, the compositions at this time possessed the desired blackness, gloss, and stability.

[0102] Experimental Example 7 7A. Procedure for assessing the formulation, hardness, and ease of removal of the composition. In this test example, except for changing the content of solid oil, the same operation as in Example 6-1 was performed to prepare a black solid topical composition (Examples 7-1 and 7-2). The hardness and ease of removal were evaluated in the same manner as in Test Example 6.

[0103] 7B. Result The results are presented in Table 7.

[0104] [Table 7]

[0105] As shown in Table 7, even when the content of solid oil is changed, a black solid topical composition with excellent hardness and ease of removal can be obtained. Furthermore, although not shown in the results, similar to Example 6-1, the solid topical compositions of Examples 7-1 and 7-2 also possess the desired blackness, gloss, and stability.

[0106] Furthermore, the black solid external composition described in the aforementioned test examples 1, 2 and 4 to 7 can be described as a composition that can be used as a cleaning composition or a washing composition. Although not shown in the results, when used as a cleaning agent, it can thoroughly cleanse sebum, sweat, dust, dirt from pores, foundation, lipstick, sunscreen and other dirt.

Claims

1. A black solid external composition comprising (1) 0.02 to 10% by mass of carbon with a particle size of 0.05 to 0.9 μm, (2) at least one of 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 aforementioned carbon, (3) 50 to 90% by mass of a liquid oil consisting of at least one of the group consisting of ester oils and hydrocarbon oils, and (4) 3 to 10% by mass of a solid oil having a melting point of 60 to 120°C consisting of at least one of the group consisting of FT synthetic wax (Fishertropsh wax), polyethylene wax and microcrystalline wax.

2. The black solid external composition as described in claim 1, wherein the L value in the CIELAB colorimetric system, as measured by a spectrophotometer, is 35 or less.

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