WO2023079692A1

WO2023079692A1 - Black solid external composition

Info

Publication number: WO2023079692A1
Application number: PCT/JP2021/040817
Authority: WO
Inventors: 智也本庄; 明中條; 健治穂園
Original assignee: 株式会社コスモビューティー
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2023-05-11
Also published as: WO2023079773A1; TW202320729A; JPWO2023079773A1; CN118215457A

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

Black solid topical composition

It relates to a black solid composition for external use.

Today, various topical compositions such as cleansing agents, facial cleansers, lip balms, etc. are on the market, and in selecting a favorite product from among a large number of products, not only the effect but also the appearance is an important factor. It's becoming For example, cleansing agents and facial cleansers are useful for effectively removing stains caused by sebum and dust, makeup cosmetics adhering to the skin, etc., and many solid and liquid cleansing agents and facial cleansers are known. ing. As an example, (A) a hydrocarbon oil having a melting point of 60 to 120° C. in an amount of 5 to 15% by mass in the total amount of the cosmetic, (B) a liquid oil containing 35% by mass or more in the total amount of the liquid oil, And (C) a solid oily cleansing cosmetic containing a nonionic surfactant having an HLB value of 5 to 13 in an amount of 5 to 30% by mass in the total amount of the cosmetic has been reported, and the cleansing cosmetic does not drip. , good compatibility with make-up cosmetics and excellent stain removal (Patent Document 1).

JP 2012-206974 A

While various compositions for external use are known in this way, the present disclosure aims to provide a black solid composition for external use that is black, glossy (glossy), and excellent in stability.

The present inventors have made intensive studies to solve the above problems, and found that (1) 0.02 to 10% by mass of charcoal having a particle size of 0.05 to 0.9 μm, (2) fatty acids and their weights By blending 0.1 parts by mass or more of at least one selected from the group consisting of coalescence, (3) liquid oil, and (4) solid oil having a melting point of 40 to 120 ° C. per 1 part by mass of the charcoal, It was found that a solid composition for external use with deep blackness, luster (glossiness) and excellent stability can be obtained. The present invention has been completed through further studies based on these findings. That is, the present disclosure includes the following inventions.
Section 1. (1) 0.02 to 10% by mass of charcoal having a particle size of 0.05 to 0.9 μm; A black solid external composition comprising 1 part by mass or more, (3) a liquid oil, and (4) a solid oil having a melting point of 40 to 120°C.
Section 2. Item 2. The black solid composition for external use according to item 1, characterized by having an L value of 35 or less in the CIELAB color system measured with a spectrophotometer.
Item 3. 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.
Section 4. 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. 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.

By blending the above (1) to (4), it is possible to provide a solid composition for external use that is deep black, glossy (glossy), and excellent in stability.

Hereinafter, embodiments included in the present disclosure will be described in further detail.

(1) 0.02 to 10% by mass of charcoal having a particle size of 0.05 to 0.9 μm; (2) at least one selected from the group consisting of fatty acids and polymers thereof; It includes a black solid external composition containing 0.1 part by mass or more, (3) liquid oil, and (4) solid oil having a melting point of 40 to 120°C.

The black solid composition for external use of the present disclosure contains (1) 0.02 to 10% by mass of charcoal having a particle size of 0.05 to 0.9 μm. The composition is not limited in this respect, but the charcoal is preferably activated carbon, medicinal charcoal, bamboo charcoal, charcoal, etc., more preferably activated charcoal, medicinal charcoal or the like. These may be used individually by 1 type, and may be used in combination of 2 or more type.

The particle size of charcoal is also not limited to this limit, but is preferably 0.08 to 0.8 μm, more preferably 0.1 to 0.7 μm. Thus, the charcoal is powdered charcoal with a very small particle size. These may be used individually by 1 type, and may be used in combination of 2 or more type. In the present disclosure, the value of particle size is a value based on the volume average particle size and is a value measured by a laser diffraction/scattering method. More specifically, it is a value measured by wet particle size distribution measurement using a laser diffraction particle size distribution analyzer, and does not indicate a primary particle size.

In the black solid external composition of the present disclosure, the content of charcoal with a particle size of 0.05 to 0.9 μm is not limited as long as it is 0.02 to 10% by mass, preferably 0.03 to 5% by mass, More preferably 0.07 to 2% by mass is exemplified.

The black solid composition for external use of the present disclosure includes (2) at least one selected from the group consisting of fatty acids and polymers thereof (hereinafter sometimes referred to as “fatty acids, etc.”), the charcoal (particle diameter 0 0.1 part by mass or more per 1 part by mass of charcoal of 0.05 to 0.9 μm. Although the number of carbon atoms in the fatty acid is not limited, it is preferably 14-20, more preferably 16-18, and the like. Fatty acids may be linear or branched, saturated or unsaturated. In the case of unsaturated fatty acids, the number of double bonds between carbon atoms is not limited, and is exemplified by 1 to 4, preferably 1 to 3, more preferably 1 or 2. The fatty acid may have a substituent such as a hydroxyl group, and examples of such fatty acids include hydroxy fatty acids, one example of which includes hydroxystearic acid. The fatty acid polymer may be any of these fatty acid polymers. The degree of polymerization is not limited as long as the effect of the present disclosure can be obtained, and the degree of polymerization (average degree of polymerization) is preferably 1-10, more preferably 2-8.

Although the present disclosure is not limited in this respect, fatty acids and polymers thereof are preferably exemplified by palmitic acid, stearic acid, isostearic acid, oleic acid, hydroxystearic acid, polyhydroxystearic acid, and the like. A fatty acid and its polymer may be used individually by 1 type, and may be used in combination of 2 or more type. Without limiting the present disclosure, these are commercially available such as NAA-142, NAA-173K, NAA-160 (NOF CORPORATION), Isostearate EX (KOKYU ALCOHOL KOGYO CO., LTD.), Oleic acid D-100 (Shin Nippon Rika Co., Ltd.), 12-hydroxystearic acid (Ito Oil Co., Ltd.), HS Oligomer 600 (Nikko Chemicals Co., Ltd.), and the like.

In the black solid composition for external use of the present disclosure, the content of at least one selected from the group consisting of fatty acids and polymers thereof is per 1 part by mass of the charcoal (charcoal having a particle size of 0.05 to 0.9 μm) It is not limited as long as it is 0.1 parts by mass or more, 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, particularly preferably 0 .15 to 2 parts by mass are exemplified.

The black solid external composition of the present disclosure contains (3) liquid oil. In the present disclosure, liquid oil means oil that is liquid at room temperature (25° C.). The liquid oil is not limited as long as the effects of the present disclosure can be obtained, but examples include ester oils, hydrocarbon oils, animal and vegetable oils, silicone oils, higher alcohols, and the like, preferably ester oils, animal and vegetable oils, and hydrocarbon oils. be done. These may be used individually by 1 type, and may be used in combination of 2 or more type.

Such liquid oils include, but are not limited to, ethylhexyl palmitate, ethylhexyl isopalmitate, isopropyl palmitate, isopropyl myristate, caprylic/capric triglyceryl, cetyl ethylhexanoate, isononane. Ester oils such as isotridecyl acid, triethylhexanoin, pentaerystil tetraethylhexanoate, octyldodecyl myristate, diisostearyl malate, triethylhexanoin, bisethoxydiglycol cyclohexane-1,4-dicarboxylate; mineral oil, undecane , dodecane, tridecane, liquid paraffin, liquid isoparaffin, squalane, α-olefin oligomer polybutene, petroleum jelly; olive oil, castor oil, avocado oil, safflower oil, soybean oil, camellia oil, corn oil, rapeseed oil, Animal and vegetable oils such as rice bran oil, palm oil, sunflower oil, cottonseed oil, and mink oil; Silicone oils such as dimethylpolysiloxane and dimethicone (chain silicone, cyclic silicone, modified silicone, etc.); lauryl alcohol, oleyl alcohol, isostearyl alcohol, etc. are exemplified by higher alcohols such as These may be used individually by 1 type, and may be used in combination of 2 or more type.

Although it does not limit the present disclosure, the liquid oil is preferably at least one selected from the group consisting of ester oils and hydrocarbon oils, or from the group consisting of ester oils, hydrocarbon oils and animal and vegetable oils. It is exemplified that at least one selected is contained. Still more preferably, the black solid external composition of the present disclosure contains cetyl ethylhexanoate, dodecane, ethylhexyl palmitate, ethylhexyl isopalmitate, isopropyl palmitate, isopropyl myristate, tri(caprylic/capric)glyceryl , isotridecyl isononanoate, triethylhexanoin, pentaerystil tetraethylhexanoate, octyldodecyl myristate, and triethylhexanoin.

In the black solid composition for external use of the present disclosure, the content of component (3) is not limited as long as the effect of the present disclosure is obtained. 95 mass %, more preferably 50 to 90 mass % is exemplified.

In addition, although it does not limit the present disclosure, as an example, the content of ester oil as component (3) may be 17 to 97% by mass in the black solid external composition of the present disclosure, more preferably It may be 28 to 95% by mass, more preferably 48 to 90% by mass. In addition, although it does not limit the present disclosure, as an example, in the black solid external composition of the present disclosure, when the content of component (3) is 20 to 97% by mass, the content of the ester oil is , in the composition, it may be 17 to 97% by mass, and as a more preferable example, when the content of component (3) is 50 to 90% by mass, the content of the ester oil is It may be medium or 48 to 90% by mass, and may be appropriately set in consideration of the above numerical range and the like.

The black solid composition for external use of the present disclosure contains (4) a solid oil having a melting point of 40-120°C. The solid oil is not limited in this respect, but is preferably a solid oil having a melting point of 50-100°C, more preferably a solid oil having a melting point of 60-95°C. The component (4) is thus solid at room temperature (25° C.).

The component (4) is not limited as long as the effect of the present disclosure is obtained, but paraffin wax, polyethylene wax, ethylene/propylene copolymer, microthrestan wax, ceresin wax, Fischer-Tropsch wax, ozokerite Examples include hydrocarbon waxes such as wax, candelilla wax, rice wax, beeswax, carnauba wax, hydrogenated jojoba oil, hydrogenated oil, silicone wax, and higher alcohols. These may be used individually by 1 type, and may be used in combination of 2 or more type.

Without limiting the present disclosure, component (4) is commercially available, for example, MULTI WAX X-445 (Sonebon), PMWAX82, Hi-Mic-1070 (Nippon Seiro Co., Ltd.), CireWax80 , CireWax 90 (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 (Celarica Co., Ltd.), beeswax golden brand (Miki Chemical Industry Co., Ltd.), and the like.

In the black solid composition for external use of the present disclosure, the content of component (4) is not limited as long as the effect of the present disclosure can be obtained. 15 mass %, more preferably 4 to 10 mass % is exemplified.

The black solid external composition of the present disclosure may further contain any other pharmaceutically or cosmetically acceptable ingredients as long as they do not interfere with the effects of the present disclosure. Examples of other components include various components that can be used in external preparations such as conventionally known cleansing agents and detergents. Such ingredients include silica, surfactants (nonionic surfactants, cationic surfactants, anionic surfactants, amphoteric surfactants, etc.), bases, moisturizing ingredients, anti-inflammatory ingredients, whitening ingredients, fragrances, Examples include coloring agents, cooling agents, antioxidants, preservatives, thickeners, emulsifiers, pH adjusters, enzymes, natural extracts such as animal and plant extracts, and active ingredients such as vitamins. These may be appropriately selected according to the purpose and the like, and may be used singly or in combination of two or more, and the blending amount thereof may also be appropriately determined.

Although the present disclosure is not limited in this respect, when silica is exemplified as another component, fumed silica and the like are exemplified as silica. Without limiting the disclosure, fumed silica is a finely divided amorphous silica, also referred to as fumed silica, which is conventionally known, treated with dimethyldichlorosilane, treated with hexamethyl Silica that has been hydrophobized by disilazane treatment or the like may also be used. When fumed silica is blended in the present disclosure, it is not limited as long as it does not interfere with the effects of the present disclosure, but the particle size of fumed silica is preferably 40 nm or less, more preferably 25 nm or less, and still more preferably 3 to 15 nm. exemplified. Fumed silica is commercially available, for example, trade name Aerosil 200 (Nippon Aerosil). These may be used individually by 1 type, and may be used in combination of 2 or more type. The particle size means the average particle size, and the particle size follows the measurement method in the trade name Aerosil 200 (Nippon Aerosil). Particle size for fumed silica refers to the average particle size of the primary particles.

When the black solid composition for external use of the present disclosure contains silica, the content is not limited as long as it does not interfere with the effects of the present disclosure. is 0.1 to 8% by mass, more preferably 0.1 to 5% by mass.

In addition, although it is not intended to limit the present disclosure, if surfactants are exemplified as other components, surfactants such as nonionic surfactants, cationic surfactants, anionic surfactants, amphoteric surfactants, etc. is exemplified. In the present disclosure, nonionic surfactants and anionic surfactants are preferably exemplified as surfactants, and nonionic surfactants are more preferably exemplified. In addition, although not limited to this limitation, the surfactant preferably has an HLB value of 5 to 13, and more preferably has an HLB value of 6 to 12. The HLB (Hydrophile Lypophile Balance) value is a known indicator of the balance between hydrophilicity and lipophilicity. Among HLB values 0 to 20, the smaller the HLB value, the stronger the lipophilicity, and the larger the HLB value, the more hydrophilic. Show strong. In this disclosure, HLB generally follows the Griffin equation. Any of these may be used alone or in combination of two or more.

Although not intended to limit the present disclosure, nonionic surfactants, for example, include polyoxyethylene fatty acid glyceryl, polyglycerin, sorbitan sesquioleate, and the like.

For example, fatty acids constituting polyoxyethylene fatty acid glyceryl are not limited to the present disclosure, but fatty acids having 8 to 22 carbon atoms are preferably exemplified, and fatty acids having 10 to 20 carbon atoms are more preferable. . The fatty acid may be a saturated fatty acid or an unsaturated fatty acid. In the case of an unsaturated fatty acid, the number of double bonds between carbon atoms is not limited, for example 1-4, preferably 1-3, more preferably 1 or 2 is exemplified. Moreover, the fatty acid may be linear or branched.

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, and linoleic acid. , linolenic acid, behenic acid, and natural fatty acids such as coconut oil fatty acid and palm oil fatty acid containing these fatty acids. These may be used individually by 1 type, and may be used in combination of 2 or more type.

The polyoxyethylene constituting the polyoxyethylene fatty acid glyceryl does not limit the present disclosure, but the average added mole number of ethylene oxide (EO) is preferably about 5 to 60, more preferably about 10 to 40. be. Moreover, the polyoxyethylene fatty acid glyceryl may be one in which at least one of the 1 to 3 hydroxyl groups in the fatty acid glyceryl is ether-bonded to polyethylene glycol.

Examples of polyoxyethylene fatty acid glyceryl include, but are not limited to, polyoxyethylene glyceryl isostearate, polyoxyethylene glyceryl isooleate, polyoxyethylene di-glyceryl, having the aforementioned average added moles of ethylene oxide (EO). Preferred examples include glyceryl isolaurate, and more preferred examples include PEG-10 glyceryl triisostearate, PEG-20 glyceryl triisostearate, PEG-10 glyceryl triisostearate, and PEG-10 glyceryl isostearate. In the present disclosure, polyoxyethylene fatty acid glyceryl may be used singly or in combination of two or more.

When the black solid external composition of the present disclosure contains a surfactant, the content is not limited as long as it does not interfere with the effects of the present disclosure, but is preferably 1 to 30% by mass, more preferably 3 to 25% by mass. %, more preferably 5 to 20% by mass.

In addition, if the components described in (1) to (4) above also correspond to any other component, in the present disclosure, the components described in (1) to (4) above are any other component. is not included. Therefore, the contents of the components described in (1) to (4) above are not included in the contents shown for any component.

Although the black solid composition for external use of the present disclosure is not limited in this respect, it preferably contains charcoal powder and does not contain black pigments such as carbon black and inorganic pigments (iron oxide, etc.). Moreover, preferably, it does not substantially contain anything other than charcoal as a black component.

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 or the like of (2), the liquid oil, and the solid oil of (4). .

The black solid composition for external use of the present disclosure is not limited in this respect, but in one embodiment, the charcoal described in (1), the fatty acid described in (2), the liquid oil described in (3), and the liquid oil described in (4). is preferably exemplified by a black solid composition for external use containing solid oil and silica.

The black solid composition for external use of the present disclosure is not limited in this respect, but in one embodiment, the charcoal described in (1), the fatty acid described in (2), the liquid oil described in (3), and the liquid oil described in (4). A preferred example is a black solid composition for external use containing a solid oil and a surfactant.

The black solid composition for external use of the present disclosure is not limited in this respect, but in one embodiment, the charcoal described in (1), the fatty acid described in (2), the liquid oil described in (3), and the liquid oil described in (4). and at least one selected from the group consisting of solid oil, silica, surfactants and preservatives (phenoxyethanol, etc.).

The black solid composition for external use of the present disclosure is obtained by mixing and solidifying the components described in (1) to (4) above in the above contents, optionally with other components, according to a conventionally known method. , can be manufactured. The mixing order of the components described in (1) to (4) and other components is not particularly limited.

Although not intended to limit the present disclosure, the production method includes a mixture containing the charcoal of the above (1) and the fatty acid of the above (2), the liquid oil of the above (3), and the solid oil of the above (4). It is preferably exemplified by mixing and manufacturing. In addition, although not intended to limit the present disclosure, the production method includes a mixture containing the charcoal of the above (1), the fatty acid of the above (2), and the liquid oil of the above (3), and the liquid oil of the above (3). It is preferably produced by mixing the oil and the solid oil of (4) above. In addition, although it does not limit the present disclosure, the production method includes the above (1) charcoal, the above (2) fatty acid, etc. and the following (3I) A preferred example is to mix a mixture containing a liquid oil, the liquid oil of (3II) below, and the solid oil of (4) above.

Liquid oils of (3I) include cetyl ethylhexanoate, dodecane, ethylhexyl palmitate, ethylhexyl isopalmitate, isopropyl palmitate, isopropyl myristate, caprylic/capric triglyceryl, isotridecyl isononanoate, triethylhexanoin, At least one selected from the group consisting of pentaerystil tetraethylhexanoate, octyldodecyl myristate and triethylhexanoin is exemplified.

Liquid oils of (3II) include ethylhexyl palmitate, ethylhexyl isopalmitate, isopropyl palmitate, isopropyl myristate, glyceryl tri(caprylate/caprate), isotridecyl isononanoate, triethylhexanoin, pentaerythyl tetraethylhexanoate, At least one selected from the group consisting of octyldodecyl myristate and triethylhexanoin is exemplified.

In these, the order of mixing the mixture, the liquid oil (3), and the solid oil (4) is not limited. For example, after mixing the mixture and the liquid oil (3), The solid oil of (4) may be mixed, or the liquid oil of (3) may be mixed after the mixture and the solid oil of (4) are mixed, and the mixture and the (3) ) and the mixture containing the solid oil of (4) may be mixed, or the mixture, the liquid oil of (3) and the solid oil of (4) may be mixed at the same time. For example, the case where the liquid oil (3I) or (3II) is used as an example of the liquid oil (3) is explained in the same manner.

Further, although not limiting the present disclosure, a mixture containing (1) the charcoal, the (2) fatty acid or the like, and the (3) liquid oil (hereinafter sometimes referred to as mixture a), The case where the liquid oil (3) and the solid oil (4) are mixed will be described as an example. Fatty acids and the like are preferably contained in an amount of 0.1 to 20 parts by weight, more preferably 0.15 to 10 parts by weight, still more preferably 0.15 to 5 parts by weight, and particularly preferably 0.15 to 2 parts by weight. are exemplified. In addition, although not intended to limit the present disclosure, in this case, 0.4 to 40 parts by mass of the liquid oil of (3) is contained in the mixture a with respect to 1 part by mass of the charcoal of (1). is preferably exemplified, more preferably 0.8 to 24 parts by mass.

In addition, although it does not limit the present disclosure, for example, the amount of the liquid oil (3) blended in the mixture a is 0.05 to 5% by mass in the black solid composition for external use of the present disclosure. is preferably exemplified, more preferably 0.1 to 3% by mass, and still more preferably 0.2 to 1.5% by mass.

Among these, it is more preferably exemplified that the entire amount of the charcoal in (1) above blended in the black solid composition for external use of the present disclosure is blended in the mixture a. Further, it is exemplified that the liquid oil (3I) is preferably contained in the mixture (a) as the liquid oil (3). In addition, when the liquid oil (3I) is included as the liquid oil (3) in the mixture a, the liquid oil (3) mixed with the mixture a is not particularly limited, but more preferably the ( The use of the liquid oil of 3II) is exemplified. In addition, although not intended to limit the present disclosure, the total amount of the fatty acid and the like of (2) and/or the liquid oil of (3I), which are blended in the black solid external composition of the present disclosure, is the mixture It is preferably exemplified that it is blended in a. Also, without limiting the present disclosure, the optional other ingredients may be incorporated at any stage in the preparation of the black solid topical composition of the present disclosure.

The pH value of the black solid external composition of the present disclosure is not limited as long as it has a pH that can be used as an external preparation for skin or the like.

The black solid composition for external use of the present disclosure is thus solid and does not exhibit fluidity at least at room temperature (25°C).

According to the black solid composition for external use of the present disclosure, it is possible to obtain a black solid composition for external use that is black, glossy (glossy), and excellent in stability.

The black solid external composition of the present disclosure is black, not pale black such as gray-like black. Although not limited in this respect, the black color of the composition is dark black (dark black), more preferably black having an L value of 35 or less in the CIELAB color system measured with a spectrocolorimeter. . The black color was measured using a color difference meter (spectrophotometer CM-2600d, manufactured by Konica Minolta Japan Co., Ltd.) as described in the examples below, and SCI (Specular Component Include) in the solid composition for external use. )) and SCE (Specular Component Exclude (excluding regular reflection light)), and is based on the SCI L value (color difference), which is 35 or less. This complies with JIS Z 8722 (2009) conditions.

The black solid composition for external use of the present disclosure has gloss (glossiness). Although not limited in this respect, the glossiness (glossy feeling) means that the surface of the composition has a glossy feeling when the composition is visually observed. The same) is used to measure SCI and SCE, and the value calculated from the difference between the L values of SCI and SCE is 2 or more, more preferably 2.5 or more.

In addition, the black solid composition for external use of the present disclosure has good stability. Stability in this disclosure refers to inhibition of settling of particles present in the composition. Although not limited in this respect, the stability is preferably measured by dissolving 50 g of the mixture containing the above ingredients in a hot water bath at 85° C., for example, as in the examples below, until the temperature of the composition reaches 80° C. By the way, the composition was poured into a 100 mL glass beaker, allowed to cool and solidified at room temperature (25° C.) for 3 hours, and the presence or absence of charcoal precipitated at the bottom of the beaker and its degree were visually confirmed. It means that no sediment of charcoal is observed on the bottom.

The black solid external composition of the present disclosure is not limited as long as it can be applied to the skin (including the scalp, mucous membranes, etc.). The composition for external use includes a cleansing composition, a cleaning composition, etc. that can be used to remove dirt from the skin such as sebum, sweat, dust, pore dirt, foundation, lipstick, sunscreen, and the like. is preferably exemplified, more preferably a cleansing composition.

The black solid external composition of the present disclosure may be applied to the skin in the same manner as conventionally known external compositions. Although not limited in this respect, as an example, an appropriate amount of the composition may be used as it is or, if necessary, contacted with a liquid such as water, and then slid over the skin. The amount of application of the black solid external composition of the present disclosure to the skin and the number of times of use are not particularly limited. should be used as After application to the skin, the composition may or may not be washed off with water, and may be wiped off with cotton or the like before use.

The present disclosure will be described in more detail below with examples, but the present disclosure is not limited to these.

Test example 1
1A. Preparation of composition Each component was mixed according to Table 1 below to prepare a solid composition for external use. Specifically, it was prepared by the following procedure.
1) The components A in the table were uniformly mixed while being heated to about 90°C to obtain a mixture.
2) A mixture obtained by mixing components B in the table was added to the mixture prepared in 1) above, and mixed uniformly at 90°C.
3) Component C in the table was added to the mixture thus obtained, and mixed uniformly at 90°C.
4) The mixture obtained in 3) above was filled in a jar container at 70°C in a molten state, allowed to cool, and stored in a jar container for solid external use (Examples 1-1 and 1-2 , Comparative Examples 1-1 and 1-2) were obtained.

1B. Evaluation procedure for blackness, gloss and stability 50 g of each solid composition for external use obtained as described above was melted in a hot water bath at 85°C, and when the composition temperature reached 80°C, 1.5 g of the composition was obtained. was poured into a gold plate and allowed to cool and solidify at room temperature (25°C) for 3 hours. Thereafter, blackness and gloss were evaluated using a color difference meter (spectral colorimeter CM-2600d, manufactured by Konica Minolta Japan, Inc.). The color difference meter measures SCI (Specular Component Include (including regular reflection light)) and SCE (Specular Component Exclude (excluding regular reflection light)). It was calculated from the difference in the respective L values of SCE. Evaluation was performed according to the following criteria.

<blackness>
○: L value of SCI is 35 or less ×: L value of SCI is higher than 35 In the evaluation, if the L value in the CIELAB color system measured with a spectral color difference meter is 35 or less, blackness is “ It can be evaluated as "dark", and the larger the value, the lighter the blackness.

<Glossy>
○: 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 the evaluation, if the value is 2 or more, the gloss (glossiness) is high and the value is small. Indeed, it is evaluated that the luster (glossiness) is lowered.

50 g of each solid composition for external use obtained as described above was dissolved in a hot water bath at 85°C. Solidified by standing to cool for 3 hours. After that, the presence or absence of charcoal precipitated at the bottom of the beaker was visually confirmed. Evaluation was performed according to the following criteria.

<Stability>
○: No charcoal sedimentation on the bottom of the beaker ×: Charcoal sedimentation on the bottom of the beaker

1C. Results The results are shown in Table 1.

As shown in Table 1, when charcoal with a particle size of 0.2 μm or 0.5 μm was used (Examples 1-1 and 1-2), blackness, gloss, and stability were all excellent. On the other hand, when charcoal with a particle size as large as 7 μm or 40 μm is used instead of using charcoal with such a small particle size (Comparative Examples 1-1 and 1-2), surprisingly, blackness and gloss However, good results were not obtained in either , stability. From this, it can be said that the charcoal used in the examples and comparative examples are all black in common, but by blending charcoal with a small particle size such as 0.2 μm or 0.5 μm, the blackness and gloss can be improved. , a solid composition for external use which is excellent in all respects of stability can be obtained. In addition, charcoal with a small particle size is more difficult to disperse uniformly than charcoal with a large particle size, and tends to precipitate easily. was taken.

In this test example, 50 g of the prepared solid composition for external use was dissolved in a hot water bath and then solidified for evaluation. . The same applies hereinafter.

Test example 2
2A. Except for using the components shown in Preparation Table 2 of the composition , each component was mixed in the same procedure as in Test Example 1, and a solid composition for external use contained in a jar container (Example 2-1, Comparative Example 2 -1 and 2-2) were obtained.

2B. Evaluation procedure for blackness, gloss and stability Blackness, gloss and stability were evaluated in the same manner as in Test Example 1.

2C. Results The results are shown in Table 2.

As shown in Table 2, when charcoal was used, it was excellent in terms of blackness, gloss, and stability. On the other hand, when iron oxide or carbon black was used in place of charcoal, blackness, luster, and stability were all inferior to those obtained when charcoal was used, and a good composition could not be obtained. . From this, it was found that by using charcoal, a solid composition for external use with good blackness, luster, and stability can be obtained.

Test example 3
3A. Composition Preparation and Evaluation Procedures According to the following Table 3, each component was thoroughly mixed using a mortar, and 9 g of the resulting mixture was placed in a glass screw tube and stirred to homogenize. Next, the mixtures (Examples 3-1 to 3-6) thus obtained were 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 diameter of the bottom of the screw tube was about 2 cm, and the mixture was filled up to a height of 3 cm from there.
◯: Charcoal is evenly distributed and no separation is observed △: Less charcoal is observed in the layer of 1/3 or more from the top (settling of charcoal is observed)
×: No charcoal is observed in the layer of 1/3 or more from the top (more charcoal sedimentation is observed)

3B. Results The results are shown in Table 3.

As shown in Table 3, when polyhydroxystearic acid was used as the fatty acid or its polymer, and when hydroxystearic acid, palmitic acid, stearic acid, or oleic acid was used instead of polyhydroxystearic acid, charcoal was uniformly dispersed, and it was found that charcoal could be stably dispersed (Examples 3-1 to 3-6). From this, it was found that charcoal can be stably dispersed even when a fatty acid other than polyhydroxystearic acid or a polymer thereof is used.

It can be said that the mixture prepared in Test Example 3 corresponds to the mixture of B shown in the table of Test Example 1 and the like. When the inventors of the present invention investigated the black solid composition for external use, they realized that the stability of the mixture of B has a relatively large effect on the stability of the composition. From this, it can be determined that the high stability of the mixture of B in the black solid composition for external use of the present disclosure also provides high stability in the black solid composition for external use. In addition, it can be said that such high stability suppresses bias of the components in the composition.

Test example 4
4A. Except for using the components shown in Preparation Table 4 of the composition , each component was mixed in the same procedure as in Test Example 1, and solid compositions for external use contained in jar containers (Examples 4-1 to 4-6 , Comparative Examples 4-1 and 4-2) were obtained.

4B. Evaluation procedure for blackness, gloss and stability Blackness, gloss and stability were evaluated in the same manner as in Test Example 1.

4C. Results The results are shown in Table 4.

As shown in Table 4, when the amount of charcoal having a small particle size (0.2 μm particle size) is 0.0125% by mass or less in the composition, at least two items of blackness, gloss, and stability are good. No good results were obtained (Comparative Examples 4-1 and 4-2). On the other hand, when the blending amount of the charcoal was further increased, excellent blackness, gloss and stability were obtained (Examples 4-1 to 4-6). From this, it was found that by blending charcoal with a small particle size at a certain ratio or more, a solid composition for external use with good blackness, gloss, and stability can be obtained.

Test example 5
5A. Except for using the components shown in Preparation Table 5 of the composition , each component was mixed in the same procedure as in Test Example 1, and the solid external composition contained in a jar container (Examples 5-1 to 5-4 ).

5B. Evaluation procedure for blackness, gloss and stability Blackness, gloss and stability were evaluated in the same manner as in Test Example 1.

5C. Results The results are shown in Table 5.

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

In addition, in Test Example 5, when the feeling of use was also confirmed, a good feeling of use was obtained with any of the compositions. Specifically, five expert panelists took 3 g of the composition prepared as described above, slid the composition on the skin with fingers, and measured the spreadability and thickness according to the following evaluation criteria. evaluated. As a result, both the easiness of spreading and the thickness of the composition were evaluated as ◯. In the evaluation, the degree of easiness of stretching and the degree of thickness were checked in advance among panelists to standardize the standards.

<Evaluation criteria for elongation>
3 points: Easy to spread on the skin 2 points: Slightly difficult to spread on the skin 1 point: Difficult to spread on the skin (does not spread unless excessive force is applied)
The average value obtained from the total score of 5 panelists was x when it was 1 to less than 1.6, △ when it was 1.6 or more and less than 2.4, and ○ when it was 2.4 or more to 3. .

<Thickness Evaluation Criteria>
3 points: feels thick
2 points: Slightly thick 1 point: No thickness (feeling of rubbing between the skin and fingers, no sense of composition between the skin and fingers)
The average value obtained from the total score of 5 panelists was x when it was 1 to less than 1.6, △ when it was 1.6 or more and less than 2.4, and ○ when it was 2.4 or more to 3. .

In addition, the black solid external compositions described in Test Examples 1, 2, 4, and 5 can be said to be compositions that can be used as cleansing compositions and cleaning compositions, and are not shown in the results. When used as a cleansing agent, sebum, sweat, dust, pore stains, foundation, lipstick, sunscreen and other stains were sufficiently removed.

Claims

(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 1 part by mass of the charcoal;
A black solid external composition comprising (3) a liquid oil and (4) a solid oil having a melting point of 40-120°C.
2. The black solid composition for external use according to claim 1, which has an L value of 35 or less in the CIELAB color system measured with a spectrocolorimeter.
3. The black solid composition for external use according to claim 1 or 2, wherein the fatty acid described in component (2) has 14 to 20 carbon atoms.
The black solid composition for external use according to any one of claims 1 to 3, wherein the content of component (4) is 2 to 25% by mass.
The black solid composition for external use according to any one of claims 1 to 4, wherein the content of component (3) is 20 to 97% by mass.