Solid powder cosmetics

Abstract

To develop a solid powder cosmetic that has excellent caking-free characteristic despite excellent dropping strength, and furthermore, adhering feeling of fitting on skin, natural finish, and also excellent ultraviolet ray protection effect.SOLUTION FOR THE PROBLEM: A solid powder cosmetic contains the following components (A) to (D): (A) organic powder whose surface is coated by metal oxide; (B) plate-shaped metal oxide; (C) plate-shaped powder other than metal oxide; and (D) oil agent which is liquid at 25°C.

Description

Technical Field

[0001] The present invention relates to solid powder cosmetics.

Background Art

[0002] Solid powder cosmetics are widely used in makeup cosmetics such as foundation, powder, eye color, cheek color, and eyebrow, and basic cosmetics such as body powder and whitening powder because of their convenience in carrying and easy usability. On the one hand, while it is easy to carry, when it is dropped during use, the solid powder cosmetics may break and become unusable. In contrast, conducting a drop test and having sufficient drop strength are important in terms of quality assurance. Also, during the use of solid powder cosmetics, caking may occur where the surface of the solid powder cosmetics solidifies due to sebum on the hands or the like. If the binding between powders is enhanced to ensure the above-mentioned drop strength, it tends to lead to caking, and the compatibility between the two has become an important issue in the development of solid powder cosmetics. In recent years, studies have also been conducted to improve the function of enhancing the ultraviolet protection effect and to improve usability such as adhesion and finish effect.

[0003] Various studies have been conducted to date. For example, there was a technology relating to a composite powder in which 60% or more inorganic powder particles of titanium dioxide or zinc oxide are supported on the surface of organic spherical powder, which has excellent UV blocking effect, is easily dispersed with other cosmetic materials, spreads well on the skin, has a natural finish without a bluish tint, and has a natural transparency (see, for example, Patent Document 1). There was also a technology for improving the dispersion state of UV-absorbing fine particles such as titanium dioxide using a particulate UV-absorbing material comprising a base particle and a plurality of UV-absorbing fine particles with an average particle size of 175 nm or less attached to the base particle (see, for example, Patent Document 2). Furthermore, there was a technology relating to a powder cosmetic with excellent safety, usability, and UV protection effect by combining titanium dioxide and / or zinc oxide of a specific particle size coated on plate-shaped powder of a specific particle size in a specific ratio with titanium dioxide and / or zinc oxide of a specific particle size coated on spherical powder of a specific particle size in a specific ratio (see, for example, Patent Document 3). Furthermore, there was a technology for a solid powder cosmetic in which the surface of organic spherical powder of a specific particle size is coated with a specific inorganic powder, and specific amounts of boron nitride and an oil component that is liquid at 25°C are contained, so that no aggregates are generated after the surface is rubbed with an applicator such as a sponge, and a clean appearance is maintained (see, for example, Patent Document 4). [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2012-229168 [Patent Document 2] Japanese Patent Publication No. 2013-221148 [Patent Document 3] Japanese Patent Publication No. 2012-240999 [Patent Document 4] Japanese Patent Publication No. 2019-218293 [Disclosure of the Invention] [Problems that the invention aims to solve]

[0005] However, the aforementioned literature has not examined technologies that possess both drop strength and excellent resistance to caking, making it difficult to develop a solid powder cosmetic that achieves both excellent drop strength and excellent resistance to caking, which are seemingly contradictory effects, while also being highly usable. In other words, conventional technologies have not been able to produce a solid powder cosmetic that is excellent in both drop strength and resistance to caking, as well as having a good adherence to the skin, a natural finish, and excellent UV protection. Therefore, the objective of the present invention is to develop a solid powder cosmetic that is excellent in both drop strength and resistance to caking, as well as having a good adherence to the skin, a natural finish, and excellent UV protection. [Means for solving the problem]

[0006] Therefore, after diligent research, the inventors discovered that by combining an organic powder coated with a metal oxide, a plate-shaped metal oxide, a plate-shaped powder other than a metal oxide, and an oil that is liquid at 25°C, a solid powder cosmetic can be obtained that has excellent drop strength, excellent resistance to caking, a close fit to the skin, a natural finish, and excellent UV protection. This led to the completion of the present invention.

[0007] In other words, the present invention is [1] The following components (A) to (D); (A) Organic powder coated with a metal oxide (B) Plate-shaped metal oxide (C) Plate-shaped powders other than metal oxides (D) Liquid oil at 25℃ This relates to a solid powder cosmetic containing [a specific ingredient]. [2] Furthermore, the present invention relates to a solid powder cosmetic composition according to [1], wherein the organic powder used in component (A) is one or more selected from the group consisting of crystalline cellulose, cellulose acetate, and starch or its derivatives. [3] Furthermore, the present invention relates to a solid powder cosmetic composition according to [1] or [2], wherein the metal oxide used in component (A) is one or more selected from the group consisting of titanium dioxide, zinc oxide, cerium oxide, and iron oxide. [4] Furthermore, the present invention relates to a solid powder cosmetic composition according to any one of the following [1] to [3], wherein component (C) is one or more selected from the group consisting of synthetic mica, barium sulfate, lauroyl lysine, boron nitride, and luminous powders. [5] Furthermore, the present invention relates to a solid powder cosmetic composition according to any one of the following [1] to [4], wherein the plate-shaped metal oxide of component (B) is one or more selected from the group consisting of titanium dioxide, zinc oxide, and iron oxide. [6] Furthermore, the present invention relates to a solid powder cosmetic composition according to any of [1] to [5], wherein the mass ratio (A) / (B) of component (A) to component (B) is 0.5 to 15. [7] Furthermore, this relates to any of the solid powder cosmetics described in [1] to [6] that contain ingredient (E) anhydrous silicic acid. [8] Furthermore, this relates to a solid powder cosmetic composition described in any of [1] to [7], which contains component (F) a nonionic surfactant. [9] Furthermore, the present invention relates to a solid powder cosmetic composition described in any of [1] to [8], wherein the penetration hardness at 25°C and 1 atm is 10 to 60. [Effects of the Invention]

[0008] The present invention provides a solid powder cosmetic that offers excellent drop resistance, is free from caking, adheres well to the skin, provides a natural finish, and offers superior UV protection. [Modes for carrying out the invention]

[0009] The details of the present invention are described below. In this specification, "~" means a range including the values ​​before and after it. In this invention, "average particle size" refers to the median diameter D50 value obtained by measurement using an image analysis device (Luzex AP, manufactured by Nireco). In the case of an asymmetrical powder, in this invention the median diameter D50 obtained from the distribution of the largest particle size is taken as the average particle size.

[0010] (Organic powder with a surface coated with metal oxide) Component (A) in the present invention is an organic powder whose surface is coated with a metal oxide (hereinafter referred to as the composite powder). Here, "surface coated" means that part or all of the surface of the base organic powder is coated with a metal oxide. The method of coating the surface of the organic powder in component (A) with a metal oxide is not particularly limited, but it can be obtained by physically coating it by mixing using a mixer such as a ball mill, hammer mill, or Henschel mixer. By using component (A), the aggregation of fine particles is suppressed by the coating treatment, resulting in excellent UV protection and a superior adherence to the skin.

[0011] Furthermore, the organic powder used as the base for component (A) is not particularly limited as long as it is commonly used in cosmetics. Examples include nylon, polymethyl methacrylate, acrylonitrile-methacrylic acid copolymer, vinylidene chloride-methacrylic acid copolymer, PET resin powder, polyethylene, polystyrene, organopolysiloxane elastomer, polymethylsilsesquioxane, polyurethane, wool, silk, crystalline cellulose, cellulose acetate, starch or its derivatives, etc., and one or more of these can be used. Examples of starch derivatives include hydroxyalkylated starches such as hydroxyethyl starch phosphate and hydroxypropyl starch phosphate, cationized starches such as hydroxypropyltrimonium chloride starch, and aluminum corn starch octenyl succinate. The organic powder of component (A) is preferably one or more selected from the group consisting of crystalline cellulose, cellulose acetate, and starch or its derivatives, from the viewpoint of firmly fixing the metal oxide to the surface of the organic powder in order to obtain a composite powder that enhances the ultraviolet protection effect, more preferably one or two selected from the group consisting of crystalline cellulose, starch or its derivatives, and even more preferably starch or its derivatives.

[0012] The average particle size of the organic powder used in component (A) is not particularly limited, but is preferably 1 μm or larger, more preferably 3 μm or larger, and even more preferably 5 μm or larger. Also, it is preferably 50 μm or smaller, more preferably 30 μm or smaller, and even more preferably 20 μm or smaller. Furthermore, it is preferably 1 to 50 μm, more preferably 3 to 30 μm, and even more preferably 5 to 20 μm. This range is preferable because it provides a better fit to the skin and a more natural finish.

[0013] In addition, the shape of the organic powder used in component (A) is not particularly limited, but from the perspective of the UV protection effect, a true spherical or substantially spherical shape is preferred, and a substantially spherical shape is more preferred from the perspective of the coating efficiency of the metal oxide. Here, the substantially spherical shape refers to a ratio of the major axis to the minor axis other than 1, and there may be irregularities on its surface, including an elliptical spherical shape, a polygonal shape, etc. For the substantially spherical powder, the ratio of the major axis to the minor axis is preferably greater than 1 and less than or equal to 1.5, and more preferably greater than 1 and less than or equal to 1.2.

[0014] The metal oxide used in component (A) is not particularly limited in terms of shape, etc., as long as it is usually used in cosmetics. Examples include zinc oxide, titanium dioxide, cerium oxide, zirconium oxide, iron oxide, etc., and one or more of these can be used. From the perspective of the UV protection effect, component (A) is preferably one or more selected from the group consisting of titanium dioxide, zinc oxide, cerium oxide, and iron oxide, more preferably one or more selected from the group consisting of titanium dioxide, zinc oxide, and iron oxide, even more preferably one or more selected from the group consisting of titanium dioxide and zinc oxide, and most preferably titanium dioxide. In addition, a metal oxide with its surface treated may be used, and examples include fatty acid treatment, silicone treatment, fluorine-based treatment, N-acyl amino acid treatment, etc., and it can be produced by either a wet or dry treatment method.

[0015] The average particle size of the metal oxide used in component (A) is not particularly limited, but is preferably 10 nm or more, more preferably 20 nm or more. Also, it is preferably 200 nm or less, more preferably 175 nm or less. Also, 10 - 200 nm is preferred, and 20 - 175 nm is more preferred. Being within this range is more preferred because the UV protection effect is more excellent.

[0016] The amount of metal oxide coating in component (A) is not particularly limited, but is preferably 50% by mass (hereinafter simply abbreviated as %) or more relative to component (A), more preferably 55% or more, and even more preferably 60% or more. Also, 90% or less is preferred, 85% or less is more preferred, and 80% or less is even more preferred. Furthermore, 50-90% is preferred, 55-85% is more preferred, and 60-80% is even more preferred. Within this range, it is more preferable because it provides a better fit to the skin and superior UV protection.

[0017] Component (A) in this invention may be a commercially available product. Examples include MTXO-70NL, FTO60-NL, MTXO-CS, and FTO-CS (manufactured by Hayate Material Co., Ltd.).

[0018] The content of component (A) in the present invention is not particularly limited, but is preferably 1% or more, more preferably 3% or more, and even more preferably 5% or more, relative to the total amount of the solid powder cosmetic. Also, it is preferably 30% or less, more preferably 25% or less, and even more preferably 20% or less. Also, it is preferably 1 to 30%, more preferably 3 to 25%, and even more preferably 5 to 20%. Within this range, it is more preferable because it is superior in terms of drop strength, adherence to the skin, and UV protection effect.

[0019] (Sheet-shaped metal oxides) Component (B) in the present invention is a metal oxide with a plate-like particle shape. The metal oxide used in component (B) is not particularly limited as long as it is commonly used in cosmetics, and examples include zinc oxide, titanium dioxide, cerium oxide, zirconium oxide, iron oxide, etc., and one or more of these can be used. Among these, from the viewpoint of UV protection effect, one or more selected from the group consisting of titanium dioxide, zinc oxide, and iron oxide is preferred, one or more selected from the group consisting of titanium dioxide and zinc oxide is more preferred, and zinc oxide is even more preferred. Here, "plate-like" refers to a powder with a flattened shape, and the planar shape may be rectangular, circular, irregular, etc., but polygonal is preferred, and hexagonal is more preferred. In particular, an aspect ratio of 2 or more is preferred, 2.5 or more is more preferred, and 3 or more is even more preferred. The aspect ratio can be calculated by average particle diameter / average thickness. In this invention, the thickness of the plate-shaped powder can be obtained by measuring the thickness of 10 arbitrary particles in an arbitrary field of view using a scanning electron microscope (Real Surface View Microscope VE-7800 manufactured by KEYENCE), and calculating the average value.

[0020] In the present invention, the average particle size of component (B) is preferably 100 nm or more, more preferably 150 nm, and even more preferably 200 nm or more. It is also preferably 3000 nm or less, more preferably 1000 nm or less, and even more preferably 500 nm or less. Furthermore, it is preferably 100 to 3000 nm, more preferably 150 to 1000 nm, and even more preferably 200 to 500 nm. Within this range, it is more preferable because it provides a better fit to the skin and a more natural finish.

[0021] The content of component (B) in the present invention is not particularly limited, but is preferably 0.1% or more, more preferably 0.5% or more, and even more preferably 1% or more, based on the total amount of the solid powder cosmetic. Also, it is preferably 15% or less, more preferably 12% or less, and even more preferably 10% or less. Furthermore, it is preferably 0.1 to 15%, more preferably 0.5 to 12%, and even more preferably 1 to 10%. Within this range, it is more preferable because it is superior in terms of drop resistance, adherence to the skin, natural finish, and UV protection effect.

[0022] In the present invention, the mass ratio (A) / (B) of component (A) to component (B) is not particularly limited, but is preferably 0.5 or more, more preferably 0.8 or more, and still more preferably 1 or more. It is also preferably 15 or less, more preferably 12 or less, and still more preferably 10 or less. Furthermore, it is preferably 0.5 to 15, more preferably 0.8 to 12, and still more preferably 1 to 10. Within this range, it is more preferable because it provides superior drop strength and UV protection effect.

[0023] (Plate-shaped powders other than metal oxides) Component (C) in this invention is a powder other than a metal oxide, with a plate-like particle shape. A plate-like powder other than a metal oxide refers to a plate-like powder other than component (B). Component (C) in this invention is not particularly limited as long as it is commonly used in cosmetics. Examples include inorganic powders such as mica, synthetic mica (synthetic fluorphlogopite), sericite, talc, kaolin, boron nitride, barium sulfate, calcium sulfate, bentonite, and smectite; luminous powders such as bismuth oxychloride, titanium mica, glass powder, and aluminum powder; and organic powders such as N-acyllysine. One or more of these can be used. Using component (C) improves the skin-friendly feel, adhesion, and natural finish. Here, luminous powders coated with a coloring agent may be used as needed. Among these, from the viewpoint of a close fit to the skin and a natural finish, one or more selected from the group consisting of synthetic mica, barium sulfate, lauroyl lysine, boron nitride, and luminous powders is preferred, one or more selected from the group consisting of synthetic mica, barium sulfate, lauroyl lysine, and boron nitride is more preferred, one or more selected from the group consisting of barium sulfate, lauroyl lysine, and boron nitride is even more preferred, and two or more selected from the group consisting of barium sulfate, lauroyl lysine, and boron nitride is most preferred. In component (C), plate-like refers to powders with a flattened shape, and the planar shape may be rectangular, circular, irregular, etc. In particular, an aspect ratio of 2 or more is preferred, 2.5 or more is more preferred, and 3 or more is even more preferred.

[0024] In the present invention, the average particle size of component (C) is preferably 1 μm or more, more preferably 3 μm, and even more preferably 5 μm or more. Furthermore, it is preferably 30 μm or less, more preferably 25 μm or less, and even more preferably 20 μm or less. Also, it is preferably 1 to 30 μm, more preferably 3 to 25 μm, and even more preferably 5 to 20 μm. Within this range, it is more preferable because it provides a better fit and adherence to the skin.

[0025] The content of component (C) in the present invention is not particularly limited, but is preferably 1% or more, more preferably 3% or more, and even more preferably 5% or more, based on the total amount of the solid powder cosmetic. Also, it is preferably 50% or less, more preferably 45% or less, and even more preferably 40% or less. Also, it is preferably 1 to 50%, more preferably 3 to 45%, and even more preferably 5 to 40%. Within this range, it is more preferable because it is superior in terms of drop strength, lack of caking, adherence to the skin, and natural finish.

[0026] In the present invention, the mass ratio of component (A) to component (C), (A) / (C), is not particularly limited, but is preferably 0.1 or higher, more preferably 0.2 or higher, and even more preferably 0.3 or higher. It is also preferably 4.5 or lower, more preferably 4 or lower, and even more preferably 3.5 or lower. Furthermore, it is preferably 0.1 to 4.5, more preferably 0.2 to 4, and even more preferably 0.3 to 3.5. Within this range, it is more preferable because it is superior in terms of the absence of caking, a close fit to the skin, a natural finish, and UV protection effect.

[0027] (Liquid oil at 25℃) In this invention, component (D) is an oil that is liquid at 25°C. The oil that is liquid at 25°C is not particularly limited as long as it is commonly used in cosmetics; any such oil can be used. Examples include hydrocarbon oils, ester oils, fatty acids, higher alcohols, silicone oils, fluorinated oils, etc., and one or more of these can be used. Using component (D) improves drop resistance and skin-adhering properties. More specifically, hydrocarbon oils such as liquid paraffin, squalane, polybutene, polyisobutylene, α-olefin oligomer, isododecane, and light isoparaffin;Diisobutyl adipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, cetyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, isostearyl 2-ethylhexanoate, caprylic / capric triglyceride, neopentyl glycol dicaprate, propylene glycol dicaprate, glyceryl tri-2-ethylhexanoate, pentaerythrityl etraethylhexanoate, polyglyceryl-10 deca-2-ethylhexanoate, isotridecyl isononanoate, isononyl isononanoate, diisopropyl sebacate Ropil, di-2-ethylhexyl sebacate, isopropyl myristate, octyldodecyl myristate, isostearyl myristate, myristyryl myristate, isopropyl palmitate, cetyl palmitate, 2-ethylhexyl palmitate, 2-ethylhexyl stearate, octyldodecyl isostearate, isostearyl isostearate, 2-ethylhexyl isostearate, isopropyl isostearate, trimethylolpropane triisostearate, ethylhexyl methoxycinnamate, stearoyl stearin Octyldodecyl oleate, polyglyceryl-2 isostearate, polyglyceryl-2 diisostearate, polyglyceryl-2 triisostearate, polyglyceryl-2 tetraisostearate, dipentaerythrityl tetraisostearate, polyglyceryl-10 decaisostearate, oleyl oleate, octyldodecyl oleate, decyl oleate, triethyl citrate, di-2-ethylhexyl succinate, diisostearyl malate, tridecyl trimellitate, coconut oil, olive oil, palm oil, macadamia nut oil, meadow burr oil Ester oils such as foam oil, jojoba oil, rapeseed oil, rice bran oil, castor oil, mink oil, dimer dilinoleyl bisisostearyl dimer dilinoleate, dimer dilinoleyl diisostearate, di(isostearyl / phytosteryl) dimer dilinoleate, dihydrogenated rosin derma dilinoleyl, and N-lauroyl-L-glutamic acid di(phytosteryl-2-octyldodecyl); fatty acids such as isostearic acid and oleic acid; higher alcohols such as oleyl alcohol, isostearyl alcohol, octyldodecanol, and decyltetradecanol;Examples include silicone oils such as dimethylpolysiloxane (kinematic viscosity 1-1000 CS), cyclomethicone, caprylyl methicone, dimethiconol, methylphenylpolysiloxane, and diphenylpolysiloxane; fluorinated oils such as perfluorodecane, perfluorooctane, and perfluoropolyether; and these can be used individually or in combination of two or more.

[0028] Among these, from the viewpoint of a good fit and adherence to the skin, one or more selected from the group consisting of hydrocarbon oils, ester oils, higher alcohols, and silicone oils are preferred, and one or more selected from the group consisting of hydrocarbon oils, ester oils, and silicone oils are more preferred. Of the hydrocarbon oils, one or more selected from the group consisting of liquid paraffin, squalane, polybutene, and isododecane are preferred. Furthermore, the ester oil is preferably one or more selected from the group consisting of cetyl 2-ethylhexanoate, caprylic / capric triglyceride, neopentyl glycol dicaprate, propylene glycol dicaprate, glyceryl tri-2-ethylhexanoate, polyglyceryl-10 deca-2-ethylhexanoate, isotridecyl isononanoate, isononyl isononanoate, diisopropyl sebacate, trimethylolpropane triisostearate, ethylhexyl methoxycinnamate, polyglyceryl-2 diisostearate, polyglyceryl-2 triisostearate, polyglyceryl-10 decaisostearate, di-2-ethylhexyl succinate, diisostearyl malate, and tridecyl trimellitate. Furthermore, the higher alcohol is preferably one or more selected from the group consisting of octyldodecanol and decyltetradecanol. Furthermore, the silicone oil is preferably one or more selected from the group consisting of dimethylpolysiloxane (kinematic viscosity 1 to 100 CS), methylphenylpolysiloxane, and diphenylpolysiloxane.

[0029] The content of component (D) in the present invention is not particularly limited, but is preferably 3% or more, more preferably 5% or more, and even more preferably 7% or more, based on the total amount of the solid powder cosmetic. Also, it is preferably 25% or less, more preferably 20% or less, and even more preferably 15% or less. Also, it is preferably 3 to 25%, more preferably 5 to 20%, and even more preferably 7 to 15%. Within this range, it is more preferable because it is superior in terms of drop strength, lack of caking, and adherence to the skin.

[0030] (Anhydrous silicic acid) The present invention may further contain component (E) anhydrous silicic acid. The anhydrous silicic acid is not particularly limited as long as it is the type commonly used in cosmetics, and any type can be used regardless of particle size, shape, porousness, non-porous properties, etc. In the present invention, the anhydrous silicic acid is preferably spherical. Here, "spherical" in component (E) includes not only perfectly spherical shapes but also approximately spherical, ellipsoidal, etc., and the ratio of major axis to minor axis is preferably 1 to 1.5, and more preferably 1 to 1.2.

[0031] The average particle size of anhydrous silicic acid is preferably 1 μm or more, more preferably 3 μm, and even more preferably 5 μm or more. Furthermore, 30 μm or less is preferred, more preferably 25 μm or less, and even more preferably 20 μm or less. Also, 1 to 30 μm is preferred, more preferably 3 to 25 μm, and even more preferably 5 to 20 μm. Within this range, a more natural finish is preferable.

[0032] The content of component (E) in the present invention is not particularly limited, but is preferably 1% or more, more preferably 3% or more, and even more preferably 5% or more, relative to the total amount of the solid powder cosmetic. Also, it is preferably 25% or less, more preferably 22% or less, and even more preferably 20% or less. Also, it is preferably 1 to 25%, more preferably 3 to 22%, and even more preferably 5 to 20%. Within this range, it is more preferable because it is superior in terms of drop strength, lack of caking, adherence to the skin, and natural finish.

[0033] (Nonionic surfactant) The present invention may further contain component (F) a nonionic surfactant. The nonionic surfactant is not particularly limited as long as it is commonly used in cosmetics, and any such surfactant can be used.

[0034] Examples of nonionic surfactants include sorbitan fatty acid esters, sucrose fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycol fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene hydrogenated castor oil, polyoxyalkylene-modified silicones, and polyoxyalkylene alkyl copolymerized silicones. One or more of these can be used. Among these, sorbitan fatty acid esters are preferred from the viewpoint of a good fit and adherence to the skin.

[0035] Examples of sorbitan fatty acid esters include sorbitan monooleate, sorbitan sesquioleate, sorbitan dioleate, sorbitan trioleate, sorbitan monoisostearate, sorbitan diisostearate, sorbitan triisostearate, sorbitan monostearate, sorbitan sesquistearate, sorbitan distearate, and sorbitan triisostearate. Particularly from the viewpoint of a close fit to the skin, one or more selected from the group consisting of sorbitan monooleate, sorbitan sesquioleate, sorbitan monostearate, sorbitan monoisostearate, sorbitan sesquistearate, and sorbitan sesquiisostearate are preferred, and one or more selected from the group consisting of sorbitan monostearate, sorbitan monoisostearate, sorbitan sesquistearate, and sorbitan sesquiisostearate are more preferred.

[0036] The content of component (F) in the present invention is not particularly limited, but is preferably 0.01% or more, more preferably 0.05% or more, and even more preferably 0.1% or more, relative to the total amount of the solid powder cosmetic. Also, 3% or less is preferred, 2% or less is more preferred, and 1% or less is even more preferred. Furthermore, 0.01 to 3% is preferred, 0.05 to 2% is more preferred, and 0.1 to 1% is even more preferred. Within this range, it is more preferable because it provides superior drop strength and a better fit to the skin.

[0037] In addition to the above-mentioned components (A) to (F), the solid powder cosmetic composition of the present invention may contain components commonly used in cosmetics, such as oily components other than component (D), powders other than components (A) to (C) and (E), surfactants other than component (F), UV absorbers, fibers, alcohols, water-soluble polymers, aqueous components such as humectants, sugars, antioxidants, defoamers, beauty ingredients, preservatives, fragrances, etc., to the extent that they do not interfere with the effects of the present invention.

[0038] The solid powder cosmetic of the present invention refers to a product mainly composed of powder containing components (A) to (C), which is molded into a solid form with excipients such as component (D). Components (E), (F), and other components may also be included as needed. Here, the main component is the component present in the largest quantity in the solid powder cosmetic. For example, the powder content is preferably 50% or more, more preferably 60% or more, and even more preferably 70% or more, relative to the total amount of the solid powder cosmetic. Furthermore, 95% or less is preferred, 90% or less is more preferred, and 85% or less is even more preferred. Also, 50-95% is preferred, 60-90% is more preferred, and 70-85% is even more preferred. Within this range, drop strength, lack of caking, and a natural finish are superior, making it more preferable.

[0039] The solid powder cosmetic composition of the present invention can be obtained by commonly known manufacturing methods. Examples of manufacturing methods are shown below, but are not limited thereto. For example, components (A) to (C), and optionally component (E), can be uniformly mixed in a Henschel mixer, and component (D), and optionally component (F), and other components can be added and mixed, and then molded. Either dry filling or wet filling methods can be used for molding. Dry filling, for example, involves filling an appropriate amount of the solid powder cosmetic composition manufactured above into a container such as a metal dish and then compression molding it. Wet filling, on the other hand, involves mixing the solid powder cosmetic composition manufactured above with a solvent, filling the mixture into a container, and then removing the solvent.

[0040] In the solid powder cosmetic composition of the present invention, the puncture hardness at 25°C and 1 atm is preferably 10 or higher, more preferably 15 or higher, and even more preferably 20 or higher. Furthermore, it is preferably 60 or lower, more preferably 50 or lower, and even more preferably 40 or lower. Also, it is preferably between 10 and 60, more preferably between 15 and 50, and even more preferably between 20 and 40. Within this range, it is more preferable because it is superior in terms of drop strength and lack of caking. The hardness can be measured using a Type A durometer (manufactured by Teclock) according to the JIS-K-6253 method.

[0041] The solid powder cosmetic composition of the present invention is not particularly limited, but examples include foundation, concealer, face powder, eyeshadow, blush, body powder, etc. In the present invention, foundation, concealer, and face powder are preferred from the viewpoint of UV protection effect. [Examples]

[0042] The present invention will be described in detail below with reference to manufacturing examples and embodiments. However, these are not intended to limit the present invention in any way.

[0043] Manufacturing example: Manufacturing of composite powders A to D of component (A) Composite powders with the compositions shown in Table 1 below were prepared using the following manufacturing method. The composite powders were evaluated for c. skin-friendly adhesion and e. UV protection effect using the evaluation method described below. The evaluation of c. skin-friendly adhesion and e. UV protection effect was performed using the evaluation criteria and judgment criteria for the examples and comparative examples below. The results are also shown in Table 1.

[0044] [Table 1]

[0045] (Manufacturing method) A: Mix the powders with the composition shown in Table 1 in a Henschel mixer at 1200 rpm for 20 minutes. B:A was crushed in a pulverizer and then sized using a co-mill to obtain a composite powder.

[0046] Examples 1-17 and Comparative Examples 1-6: Powder Foundation Powder foundations with the formulations shown in Tables 2 and 3 below were prepared using the following manufacturing method, and evaluated for the following aspects: a. drop strength, b. non-caking, c. adherence to the skin, d. natural finish, and e. UV protection effect, using the evaluation method described below. The results are also shown in Tables 2 and 3.

[0047] [Table 2]

[0048] *1: SHP-6 (manufactured by Mizushima Iron Alloy Co., Ltd.) *2: PDM-20L (manufactured by Topi Industries Co., Ltd.) *3: High Filler K-5 (manufactured by Muramatsu Sangyo Co., Ltd.) *4: Sunsphere N-100 (manufactured by AGC SI-TEC) *5: NIKKOL SS-15V (manufactured by Nippon Surfactant Industry Co., Ltd.)

[0049] [Table 3]

[0050] (Manufacturing method) A: Mix ingredients (1) to (17) uniformly using a Henschel mixer. B: Heat ingredients (18) to (23) to 60°C and mix them uniformly. Add B to C:A, mix uniformly, and grind. D:C was filled into a resin dish and compressed to obtain a powder foundation.

[0051] (Evaluation Method 1) (i. Drop strength) Fill a plastic dish (5cm long x 4cm wide x 1cm deep) with 10g of each sample and fill with 200kg / cm³. 2 The compressed material was dropped twice from a height of 50 cm onto a plastic tile, and its state was observed. Five samples were used for each sample in the drop test. After dropping, the degree of collapse was checked and evaluated according to the following evaluation criteria. The average score of each of the five samples was then used for the final judgment according to the following criteria.

[0052] <Evaluation Criteria> (Rating): (Evaluation result) 4: No change 3: Slight chipping or gaps are observed. 2: Chipped or gapped areas are clearly visible. 1: Missing or cracking occurs. <Judgment criteria> (Judgment): (Average score) A: More than 3.5 points B: More than 3 points and less than 3.5 points C: More than 2 points but less than 3 points D: 2 points or less

[0053] (Evaluation Method 2) (Lack of caking) The surface of each sample was traced back and forth 50 times with a finger, and the surface condition of each sample was visually inspected. If caking (solidification of the surface of each sample) occurred during the process, tracing was stopped, and the number of traces until caking occurred was recorded. The absence of caking was judged according to the following criteria.

[0054] <Judgment criteria> (Judgment): (Evaluation) A: Even after tracing it back and forth 50 times, it's not caking. B: Caking occurs after 46-50 round trips. C: Caking occurs after 36-45 round trips. D: Caking occurs with 36 round trips or less.

[0055] (Evaluation Method 3) Ten women in their 20s to 40s, trained in sensory evaluation and capable of evaluating according to a set standard, were selected as a specialized panel for cosmetic evaluation. Each panelist applied each sample twice to their forearm with a puff and evaluated each sample on a 5-point scale using the absolute evaluation criteria below, specifically for "H. Adhesion to the skin" and "D. Natural finish." The average score was calculated from the total scores of all panel members for each sample, and the evaluation was determined according to the 4-point evaluation criteria below. (Evaluation criteria) H. Skin-friendly adherence: When applied, does it not flake off, and does the makeup film feel like it adheres well to the skin? II. Natural finish: Does the applied makeup film have a soft-focus effect that blurs blemishes and wrinkles, giving a natural impression?

[0056] <Evaluation Criteria> (Rating): (Evaluation) 5 points: Very good 4 points: Good 3 points: Average 2 points: Bad 1 point: Very bad <Judgment criteria> (Judgment): (Average score) A: Over 4.5 points B: A score between 3.5 and 4.5 C: A score between 2.5 and 3.5 points. D: 2.5 points or less

[0057] (Evaluation Method 4) (H. UV protection effect) Each sample was placed on artificial leather (2cm x 2cm) at a concentration of 2mg / cm².2 After coating, samples were allowed to stand for 20 minutes, and the SPF was measured using an SPF analyzer (UV-2000S, Labsphere). Each sample was measured five times, and the average of the obtained measurements was used to determine the SPF according to the following criteria. <Judgment criteria> (Judgment): (Evaluation) A: SPF20 or higher B: SPF 15 or higher but less than 20 C: SPF 10 or higher but less than 15 D: SPF less than 10

[0058] The results in Tables 2 and 3 show that the examples yielded better results than the comparative examples in all aspects, including drop strength, lack of caking, skin-friendly adhesion, natural finish, and UV protection. On the other hand, Comparative Example 1, which did not contain ingredient (A), had insufficient UV protection and did not achieve satisfactory quality in terms of lack of caking. Comparative Example 2, which used calcium carbonate coated with fine titanium dioxide particles instead of ingredient (A), had insufficient skin-friendly adhesion and did not achieve satisfactory quality in terms of drop strength and natural finish. Furthermore, Comparative Example 3, which had fine titanium dioxide particles and corn starch added separately instead of ingredient (A), had insufficient skin-friendly adhesion and UV protection, and did not achieve satisfactory quality in terms of natural finish. Comparative Example 4, which did not contain ingredient (B), did not achieve satisfactory quality in terms of skin-friendly adhesion and UV protection curing. Furthermore, Comparative Example 5, which used amorphous fine zinc oxide particles instead of ingredient (B), had insufficient skin-friendly adhesion and did not achieve satisfactory quality in terms of natural finish. Comparative Example 6, which did not contain ingredient (C), lacked sufficient adherence to the skin and a natural finish, and did not achieve satisfactory quality in terms of the absence of caking.

[0059] Example 18: White powder (Ingredients) (%) 1. Titanium dioxide coated starch powder*6 10 2. Zinc oxide (average particle size 25 nm) coated cellulose acetate powder 4 3. Hexagonal plate-shaped zinc oxide (average particle size 1 μm) 5 4. Mica (plate-shaped, average particle size 30 μm) *7 6 5. Talc (plate-like, average particle size 13 μm) * 8 7 6. Plate-shaped barium sulfate (average particle size 20 μm) 3 7. Boron nitride (plate-like, average particle size 6 μm) 5 8. Titanium mica*9 6 9. Red iron oxide coated mica titanium *10 4 10. Titanium oxide coated glass powder *11 2 11. Red iron oxide coated titanium oxide coated glass powder *12 1 12. Synthetic fluorphlogopite iron*13 1 13.Red iron (needle-shaped, average particle size 0.1μm)*14 1.1 14. Yellow iron oxide (needle-shaped, average particle size 0.1 μm) *14 1.8 15. Black iron oxide (needle-shaped, average particle size 0.1 μm) * 14 0.5 16. Spherical polyurethane (average particle size 9 μm) * 15 4 17. Spherical silicone powder *16 4 18. Spherical porous anhydrous silicic acid (average particle size 5 μm) *17 6 19. Spherical non-porous anhydrous silicic acid (average particle size 9 μm) 3 20. Polymethylsilsesquioxane*18 2 21. Talc (amorphous, average particle size 5 μm) Remaining amount 22. Lauroyl lysine*19 0.6 23. Trifluoroalkyldimethyltrimethylsiloxysilicate*20 0.4 24. Sorbitan sesquiisostearate 0.4 25. Vaseline 4 26. Shea butter 0.01 27. Corn oil 0.01 28. Jojoba seed oil 0.01 29. Olive oil 0.05 30. Squalane 0.02 31. Cetyl ethylhexanoate 1 32. Ethylhexyl Methoxycinnamate 6 33. Methylpolysiloxane (kinematic viscosity at 25°C: 10 CS) 3 34. Jasmine flower extract 0.01 35. Hydrolyzed collagen 0.003 36. Hydrolyzed elastin 0.002 37. DL-α-tocopherol acetate 0.005 38. Ascorbyl tetrahexyldecanoate 0.02 39. Centifolia rose flower water 0.05 40.Fragrance 0.02 *6: MTXO-CS (manufactured by Hayate Material Co., Ltd.) *7:3% amodimethicone treatment *8: SE-TA-EX (manufactured by Miyoshi Chemical Co., Ltd.) *9: COSMETICA FINE WHITE N-8000D (manufactured by CQV) *10: BLONDIEE METALLIC GOLD N-2000S (manufactured by CQV) *11: Microglass Metashine MT5600RS (manufactured by Nippon Sheet Glass Co., Ltd.) *12: REFLECKS MULTIDIMENSIONS TWISTED TERRACOTTA G390D (BASF) *13: PDM-FE (manufactured by Topi Industries Co., Ltd.) *14: Treated with 2% methylpolysiloxane *15:D-400 (manufactured by Negami Kogyo) *16: KSP-100 (manufactured by Shin-Etsu Chemical Co., Ltd.) *17:HCS 160M5 (manufactured by JGC Catalysts & Chemicals) *18: TOSPEARL 3000A (manufactured by Momentive Performance Materials) *19: Amihope LL (manufactured by Ajinomoto Co., Inc.) *20:XS66-B8226 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0060] (Manufacturing method) A: Mix ingredients (1) to (22) uniformly using a Henschel mixer. B: Heat ingredients (23) to (31) to 60°C and mix them uniformly. Add components (32) to (40) to C:B and mix uniformly. After adding C to D:A and mixing uniformly, the mixture is pulverized using a pulverizer. E:D was filled into a gold dish and compressed to obtain white powder.

[0061] The face powder of Example 18 exhibited excellent drop resistance, lack of caking, a smooth, natural finish, and UV protection.

Claims

1. The following components (A) to (D): (A) Organic powder with a metal oxide coating on its surface (B) Plate-shaped metal oxide (C) Plate-shaped powders other than metal oxides (D) Liquid oil at 25°C It contains, A solid powder cosmetic in which the organic powder used in component (A) is one or more of nylon, crystalline cellulose, cellulose acetate, and starch or its derivatives.

2. The solid powder cosmetic composition according to claim 1, wherein the metal oxide used in component (A) is one or more selected from the group consisting of titanium dioxide, zinc oxide, cerium oxide, and iron oxide.

3. The solid powder cosmetic composition according to claim 1 or 2, wherein the component (C) is one or more selected from the group consisting of synthetic mica, barium sulfate, lauroyl lysine, boron nitride, and luminous powders.

4. The solid powder cosmetic composition according to any one of claims 1 to 3, wherein the aforementioned component (B) plate-shaped metal oxide is one or more selected from the group consisting of titanium dioxide, zinc oxide, and iron oxide.

5. A solid powder cosmetic composition according to any one of claims 1 to 4, wherein the mass ratio (A) / (B) of component (A) to component (B) is 0.5 to 15.

6. Furthermore, the solid powder cosmetic composition according to any one of claims 1 to 5, further comprising component (E) anhydrous silicic acid.

7. Furthermore, the solid powder cosmetic composition according to any one of claims 1 to 6, further comprising component (F) a nonionic surfactant.

8. A solid powder cosmetic composition according to any one of claims 1 to 7, wherein the puncture hardness at 25°C and 1 atm is 10 to 60.

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