Water-wetted solid powder cosmetic

Abstract

Provided is a novel water-wetted solid powder cosmetic excellent in usability and impact resistance.　A water-wetted solid powder cosmetic according to the present disclosure contains plate-like mica and spherical inorganic particles, wherein the plate-like mica includes hydrophobic plate-like mica and hydrophilic plate-like mica, and the spherical inorganic particles include hydrophobic spherical inorganic particles and hydrophilic spherical inorganic particles.

Description

Water-wet powder solid cosmetics

[0001] The present disclosure relates to a water-wet powder solid cosmetic preparation.

[0002] BACKGROUND ART A variety of solid cosmetic powders containing powder components that can be used for foundations and the like, and methods for producing the same, have been developed.

[0003] Patent Document 1 discloses a method for producing a solid powder cosmetic, in which a mixture containing a powder component and an oily component as a binder is dissolved or dispersed in a volatile dispersion medium, filled into a container, and then the volatile dispersion medium is removed, in which the volatile dispersion medium contains water as the primary dispersion medium and a water-soluble organic solvent as a secondary dispersion medium in an amount of 0 to 30 mass %, and the contact angle of the volatile dispersion medium with the mixture dissolved or dispersed in the volatile dispersion medium is 125 degrees or more.

[0004] Patent Document 2 discloses a solid powder cosmetic containing an organically modified clay mineral and silicone oil.

[0005] Patent Document 3 discloses a method for producing a solid powder cosmetic that does not contain plastic microbeads, in which a cosmetic base material prepared by mixing a powder containing (A) fluorine-treated talc, (B) hydrophobized silica, and (C) hydrophobized titanium dioxide fine particle with (D) an oil containing a water-holding oil capable of holding water in an amount equal to or greater than its own weight is mixed with a solvent to form a slurry, which is then filled into a container and the solvent is removed.

[0006] Patent Document 4 discloses a solid powder cosmetic, which is prepared by mixing a cosmetic base material prepared by mixing a powder containing (A) spherical nonporous silica with an oil, and then mixing the resulting mixture with a solvent to form a slurry, which is then filled into a container and the solvent is removed.

[0007] JP 2016-037496 A JP 2002-220316 A JP 2018-177640 A JP 2020-093996 A

[0008] Solid cosmetic preparations in powder form can be formed, for example, by a dry molding method or a wet molding method. Among these, a water-wet molding method using water is known as a wet molding method. However, when attempting to obtain solid cosmetic preparations in powder form using this water-wet molding method, problems related to usability and impact resistance may arise.

[0009] Therefore, an object of the present disclosure is to provide a novel water-moistened powder solid cosmetic preparation that is easy to use and has excellent impact resistance.

[0010] Aspect 1: A water-wet powder solid cosmetic comprising plate-like mica and spherical inorganic particles, wherein the plate-like mica comprises hydrophobic plate-like mica and hydrophilic plate-like mica, and the spherical inorganic particles comprise hydrophobic spherical inorganic particles and hydrophilic spherical inorganic particles. Aspect 2: The cosmetic according to Aspect 1, wherein the content of the plate-like mica is 35% by mass or more relative to the total amount of the cosmetic. Aspect 3: The cosmetic according to Aspect 1 or 2, wherein the content of the hydrophobic plate-like mica is 25 to 95% by mass relative to the total amount of the plate-like mica. Aspect 4: The cosmetic according to any one of Aspects 1 to 3, wherein the content of the spherical inorganic particles is 4.0% by mass or more relative to the total amount of the cosmetic. Aspect 5: The cosmetic according to any one of Aspects 1 to 4, wherein the content of the hydrophobic spherical inorganic particles is 25 to 95% by mass relative to the total amount of the spherical inorganic particles. Aspect 6: The cosmetic according to any one of Aspects 1 to 5, wherein the spherical inorganic particles comprise at least one selected from the group consisting of silica, calcium carbonate, and glass. Aspect 7: The cosmetic according to any one of Aspects 1 to 6, wherein the cosmetic is a foundation. Aspect 8: A method for producing the cosmetic according to any one of Aspects 1 to 7, comprising: blending a mixture containing the plate-like mica, the spherical inorganic particles, and an oily component as a binder with a volatile dispersion medium to obtain a slurry; and filling the slurry into a container and then removing the volatile dispersion medium, wherein the volatile dispersion medium contains 50% by mass or more of water relative to the total amount of the dispersion medium.

[0011] According to the present disclosure, a novel water-wet powder solid cosmetic preparation that is excellent in usability and impact resistance can be provided.

[0012] FIG. 1(a) is a schematic diagram of mica and inorganic particles in a conventional solid cosmetic product in powder form prepared by a water-wet molding method using hydrophilic plate-like mica and hydrophilic spherical inorganic particles, and FIG. 1(b) is a schematic diagram of mica and inorganic particles in a solid cosmetic product in powder form prepared by a water-wet molding method using the configuration of one embodiment of the present disclosure.

[0013] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings as necessary. The present disclosure is not limited to the following embodiments, and various modifications can be made within the scope of the present invention.

[0014] The water-wet powder solid cosmetic of the present disclosure contains plate-like mica and spherical inorganic particles, of which the plate-like mica contains hydrophobic plate-like mica and hydrophilic plate-like mica, and the spherical inorganic particles contain hydrophobic spherical inorganic particles and hydrophilic spherical inorganic particles.

[0015] Although not limited by the theory, the mechanism by which the powder solid cosmetic preparation of the present disclosure exhibits excellent usability and impact resistance despite being prepared using a water-wet molding method is believed to be as follows.

[0016] For example, when only hydrophilic plate-like mica and hydrophilic spherical inorganic particles are used, they have a high affinity for each other, and are therefore likely to be integrated during production by a water-wet molding method, as shown in Figure 1(a). As a result, the plate-like mica and the spherical inorganic particles tend to be present locally within the cosmetic, and the resulting cosmetic is unlikely to have a fluffy feel in use or good impact resistance. This tendency is also seen when only hydrophobic plate-like mica and hydrophobic spherical inorganic particles are used.

[0017] On the other hand, as shown in Figure 1 (b), the solid cosmetic preparation in powder form of the present disclosure contains integrated units of hydrophilic plate-like mica and hydrophilic spherical inorganic particles, as well as integrated units of hydrophobic plate-like mica and hydrophobic spherical inorganic particles, which are believed to act to inhibit further integration with each other. As a result, the plate-like mica and spherical inorganic particles are arranged in a balanced manner within the cosmetic preparation, which is believed to provide the cosmetic preparation with a soft feel in use and good impact resistance.

[0018] Furthermore, when only plate-like mica (for example, hydrophilic plate-like mica) is used, some of the plate-like mica will come into contact with each other, resulting in increased resistance between the mica particles in contact, making it difficult to achieve a soft, fluffy feel when used, etc. The solid cosmetic preparation in powder form according to the present disclosure contains spherical inorganic particles in addition to plate-like mica, which can reduce or prevent contact between the mica particles, and is therefore believed to be able to improve such problems.

[0019] In the past, when a solid cosmetic product in powder form having excellent usability and impact resistance was produced by a water wet molding method, resin powder, talc, etc. were sometimes blended in. The solid cosmetic product in powder form of the present disclosure can achieve excellent usability and impact resistance even without using such materials.

[0020] Furthermore, as described above, the solid cosmetic powder preparation of the present disclosure has a balanced arrangement of plate-like mica and spherical inorganic particles within the cosmetic. When the cosmetic preparation in this state is applied to the skin, the flat surfaces of the plate-like mica, which contribute to brilliance, are more likely to be arranged substantially parallel to the skin than in cosmetics prepared by conventional wet molding methods. As a result, the solid cosmetic powder preparation of the present disclosure can also provide a glossy skin feel as an additional effect.

[0021] The definitions of terms used in this disclosure are as follows:

[0022] In the present disclosure, "usability" refers to the ease of use of a powder solid cosmetic, and refers to, for example, a soft feel when used, the ease with which the cosmetic can be taken up with a puff in a compact case filled with the powder solid cosmetic (smoothness of the cosmetic), or the ease with which the obtained cosmetic can be applied to the skin (for example, the ability to easily spread the cosmetic on the skin).

[0023] <<Water-Wet Powder Solid Cosmetic>> The powder solid cosmetic of the present disclosure contains plate-like mica and spherical inorganic particles as powder components, and can be in the form of, for example, what is known as a pressed powder.

[0024] <Plate Mica> The powder solid cosmetic preparation of the present disclosure contains hydrophobic plate mica and hydrophilic plate mica as the plate mica. The plate mica can be used alone or in combination of two or more types. Here, in the present disclosure, "hydrophobic" refers to a property of low affinity for water, and "hydrophilic" refers to a property of high affinity for water. These properties can be evaluated, for example, by placing 50 g of ion-exchanged water and 0.1 g of the evaluation powder in a transparent, sealed container, storing at 50°C for one day, and then visually observing the powder. Specifically, if the majority of the evaluation powder (e.g., 50% or more of the evaluation powder) is present near the surface of the ion-exchanged water (e.g., within a region approximately 1 cm below the water surface), the powder can be evaluated as "hydrophobic." Conversely, if the majority of the evaluation powder (e.g., 50% or more of the evaluation powder) is not present near the surface of the ion-exchanged water but is dispersed in water, the powder can be evaluated as "hydrophilic." In addition, when the specific gravity of the powder to be evaluated is larger than that of mica (for example, when the specific gravity is 3.0 g / cm ３ More than 5.0 g / cm ３ In the above cases, "hydrophobicity" and "hydrophilicity" can be evaluated by the following method instead of the evaluation method. For example, when ion-exchanged water is dropped into a container filled with powder in an atmosphere of 25°C, if the water turns into droplets that roll on the surface, it can be evaluated as "hydrophobic", and if the water does not turn into droplets but fits into the surface, it can be evaluated as "hydrophilic".

[0025] The shape of the plate-like mica can be defined, for example, by its aspect ratio. The aspect ratio of the plate-like mica can be, for example, 1.2 or more, 1.5 or more, 2.0 or more, 2.5 or more, 3.0 or more, 5.0 or more, 7.0 or more, 10 or more, 15 or more, 20 or more, 25 or more, or 30 or more, and can be 200 or less, 170 or less, 150 or less, 120 or less, 100 or less, 70 or less, or 50 or less. Plate-like mica having an aspect ratio within such ranges can be used alone or in combination of two or more types.

[0026] The aspect ratio can be calculated, for example, by selecting any 10 or more (e.g., 100) plate-like micas by microscopic observation (e.g., scanning electron microscope observation), measuring the longitudinal (surface) length of each plate-like mica and the lateral (thickness) length of the plate-like mica, and dividing the longitudinal length by the lateral length (i.e., longitudinal length / lateral length). The longest longitudinal length is selected, and the shortest lateral length is selected. The aspect ratio can be the average value of the aspect ratios of any 10 or more (e.g., 100) plate-like micas.

[0027] In some embodiments, the average particle size of the plate-like mica can be specified. Such an average particle size can be 0.1 μm or more, 0.5 μm or more, 1.0 μm or more, 3.0 μm or more, or 5.0 μm or more, and can be 40 μm or less, 30 μm or less, 20 μm or less, 15 μm or less, 10 μm or less, 7.0 μm or less, or 5.0 μm or less. Plate-like mica having an average particle size within such ranges can be used alone or in combination of two or more types. Here, the average particle size of the plate-like mica can be specified as the average value of the diameters of the plate-like mica optically measured by dynamic light scattering, assuming that the plate-like mica is spherical.

[0028] The content of plate-like mica (i.e., the total amount of hydrophobic plate-like mica and hydrophilic plate-like mica) is preferably 35% by mass or more, 37% by mass or more, 40% by mass or more, 43% by mass or more, or 45% by mass or more relative to the total amount of the cosmetic, from the viewpoints of usability, impact resistance, and providing a glossy skin feel. The upper limit of this content can be, for example, 60% by mass or less, 57% by mass or less, 55% by mass or less, or 53% by mass or less. Plate-like mica can be appropriately blended into the cosmetic within this range.

[0029] Examples of mica (sometimes referred to as "mica") constituting the plate-like mica include synthetic mica, calcined mica, and uncalcined mica. Specific examples include sericite, muscovite, phlogopite, synthetic mica, synthetic iron phlogopite, lepidolite, biotite, calcined sericite, calcined muscovite, and calcined phlogopite. Other examples include mica coated with an inorganic substance such as an inorganic oxide, such as titanium oxide-coated mica and iron oxide-titanium oxide-coated mica, which is mica coated with iron oxide and titanium oxide. Other examples include plate-like particles containing mica components, such as titanium mica (titanium mica), iron oxide-coated titanium mica, carmine-coated titanium mica, carmine- and konjou-coated titanium mica, iron oxide- and carmine-treated titanium mica, konjou-treated titanium mica, iron oxide- and konjou-treated titanium mica, chromium oxide-treated titanium mica, and black titanium oxide-treated titanium mica.

[0030] (Hydrophobic Plate-Like Mica) Hydrophobic plate-like mica can be obtained by treating the above-mentioned mica with, for example, a surface treatment agent that can exhibit hydrophobic properties. The hydrophobic plate-like mica can be used alone or in combination of two or more kinds.

[0031] Examples of such surface treatment agents include higher fatty acids, metal soaps, oils and fats, waxes, silicone compounds (e.g., carboxydecyltrisiloxane, dimethicone, acrylic-silicone graft copolymers), fluorine compounds, hydrocarbons, surfactants, dextrin fatty acid esters (e.g., dextrin palmitate), amino acids (lauroyl lysine), distearyldimonium chloride, and distearyldimonium chloride. Here, the higher fatty acids may refer to saturated or unsaturated fatty acids having 6 or more carbon atoms, and specific examples include myristic acid and stearic acid. The surface treatment agents may be used alone or in combination.

[0032] The content of hydrophobic platy mica can be 25% by mass or more, 30% by mass or more, 40% by mass or more, 50% by mass or more, 55% by mass or more, 60% by mass or more, 65% by mass or more, 70% by mass or more, or 75% by mass or more, relative to the total amount of platy mica in the cosmetic, and can be 95% by mass or less, 90% by mass or less, 85% by mass or less, 80% by mass or less, 75% by mass or less, 70% by mass or less, 65% by mass or less, 60% by mass or less, 55% by mass or less, or 50% by mass or less. The hydrophobic platy mica can be blended into the cosmetic as appropriate within these ranges. In some embodiments, from the viewpoints of usability, impact resistance, and providing a glossy skin feel, the content of hydrophobic platy mica relative to the total amount of platy mica in the cosmetic is preferably 50% by mass or more, 55% by mass or more, or 60% by mass or more, more preferably 65% ​​by mass or more, 70% by mass or more, or 75% by mass or more, and is preferably 90% by mass or less, 85% by mass or less, or 80% by mass or less.

[0033] (Hydrophilic Plate Mica) Untreated plate mica that has not been treated with a surface treatment agent capable of imparting hydrophobic properties as described above can typically be used as hydrophilic plate mica. Alternatively, the above-mentioned mica may be treated with, for example, a surface treatment agent capable of imparting hydrophilic properties and used as hydrophilic plate mica. Among these, untreated plate mica is preferred as the hydrophilic plate mica from the viewpoints of usability, impact resistance, and providing a glossy skin feel. The hydrophilic plate mica can be used alone or in combination of two or more types.

[0034] Examples of surface treatment agents that can exhibit hydrophilic properties include silane compounds having a hydrophilic organic group (e.g., hydrophilic silane compounds having a polyoxyethylene chain). The surface treatment agents can be used alone or in combination of two or more.

[0035] The content of hydrophilic platy mica can be 5.0% by mass or more, 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, 30% by mass or more, 35% by mass or more, 40% by mass or more, 45% by mass or more, 50% by mass or more, 55% by mass or more, 60% by mass or more, 65% by mass or more, 70% by mass or more, or 75% by mass or more, or 75% by mass or less, 70% by mass or less, 65% by mass or less, 60% by mass or less, 55% by mass or less, 50% by mass or less, 45% by mass or less, 40% by mass or less, 35% by mass or less, 30% by mass or less, or 25% by mass or less, relative to the total amount of platy mica in the cosmetic. The hydrophilic platy mica can be blended into the cosmetic within these ranges as appropriate. In some embodiments, the content of hydrophilic platy mica relative to the total amount of platy mica in the cosmetic is preferably 5.0% by mass or more, 10% by mass or more, 15% by mass or more, or 20% by mass or more, from the viewpoints of usability, impact resistance, and providing a glossy skin feel, and is also preferably 35% by mass or less, 30% by mass or less, or 25% by mass or less.

[0036] <Spherical Inorganic Particles> The solid cosmetic preparation in powder form of the present disclosure contains hydrophobic spherical inorganic particles and hydrophilic spherical inorganic particles as spherical inorganic particles. The spherical inorganic particles can be used alone or in combination of two or more types.

[0037] The shape of the spherical inorganic particles can be defined, for example, by their sphericity. The sphericity of the spherical inorganic particles can be, for example, 0.80 or more, 0.85 or more, 0.90 or more, 0.95 or more, or 0.97 or more. The upper limit of the sphericity can be 1.0 or less or less than 1.0.

[0038] The sphericity can be calculated, for example, by extracting any 10 or more (e.g., 100) spherical inorganic particles by microscopic observation (e.g., scanning electron microscopic observation) and calculating the ratio of the longest diameter to the shortest diameter of each spherical inorganic particle (i.e., longest diameter / shortest diameter). The sphericity can be calculated as the average value of the sphericities of any 10 or more (e.g., 100) spherical inorganic particles.

[0039] The size of the spherical inorganic particles is not particularly limited. For example, the average particle size of the spherical inorganic particles can be 0.01 μm or more, 0.05 μm or more, 0.1 μm or more, 0.5 μm or more, 1.0 μm or more, 3.0 μm or more, or 5.0 μm or more, and can be 50 μm or less, 30 μm or less, 20 μm or less, 15 μm or less, or 10 μm or less. The spherical inorganic particles having an average particle size within such ranges can be used alone or in combination of two or more kinds.

[0040] The average particle size can be defined as the average value of the diameter of particles optically measured by dynamic light scattering, assuming that the particles have a spherical shape.

[0041] From the viewpoints of usability, impact resistance, and providing a glossy skin feel, the content of the spherical inorganic particles (i.e., the total amount of hydrophobic spherical inorganic particles and hydrophilic spherical inorganic particles) is, for example, preferably 4.0% by mass or more, 5.0% by mass or more, 6.0% by mass or more, or 7.0% by mass or more, relative to the total amount of the cosmetic, and is preferably 15% by mass or less, 13% by mass or less, 12% by mass or less, 11% by mass or less, or 10% by mass or less. The spherical inorganic particles can be appropriately blended into the cosmetic within these ranges.

[0042] As inorganic materials constituting the spherical inorganic particles, for example, from the viewpoints of usability, impact resistance, and providing a glossy skin feel, silica, calcium carbonate, and glass are preferred, silica and calcium carbonate are more preferred, and silica is particularly preferred. The inorganic materials can be used alone or in combination of two or more. As silica, either porous silica or non-porous silica can be used, but from the viewpoints of usability, impact resistance, and providing a glossy skin feel, porous silica is preferred. Here, porous silica refers to silica having more pores on the surface than silica used as non-porous silica in the field of cosmetics, and for example, porous silica having a BET specific surface area of ​​50 m or more measured by the BET method (gas adsorption method). ２ / g over 100m ２ / g or more, 300m ２ / g or more, 500m ２ / g or more, or 700m ２The upper limit of the BET specific surface area is not particularly limited, and may be, for example, 2,000 m ２ / g or less, 1,500m ２ / g or less, 1,000m ２ / g or less, or 800m ２ / g or less.

[0043] (Hydrophobic Spherical Inorganic Particles) Hydrophobic spherical inorganic particles can be obtained by treating the above-mentioned spherical inorganic particles with, for example, a surface treatment agent that can exhibit hydrophobic properties. The hydrophobic spherical inorganic particles can be used alone or in combination of two or more kinds.

[0044] As with the hydrophobic platy mica, examples of such surface treatment agents include higher fatty acids, metal soaps, oils and fats, waxes, silicone compounds (e.g., carboxydecyltrisiloxane, dimethicone, acrylic-silicone graft copolymers), fluorine compounds, hydrocarbons, surfactants, dextrin fatty acid esters (e.g., dextrin palmitate), amino acids (lauroyl lysine), distearyldimonium chloride, and distearyldimonium chloride. Here, the higher fatty acids may refer to saturated or unsaturated fatty acids having 6 or more carbon atoms, and specific examples include myristic acid and stearic acid. The surface treatment agents can be used alone or in combination of two or more.

[0045] The content of the hydrophobic spherical inorganic particles can be 25% by mass or more, 30% by mass or more, 35% by mass or more, 40% by mass or more, 45% by mass or more, or 50% by mass or more, and can be 95% by mass or less, 90% by mass or less, 85% by mass or less, 80% by mass or less, 75% by mass or less, 70% by mass or less, 65% by mass or less, 60% by mass or less, 55% by mass or less, or 50% by mass or less, relative to the total amount of spherical inorganic particles in the cosmetic. The hydrophobic spherical inorganic particles can be appropriately blended into the cosmetic within such ranges. In some embodiments, from the viewpoints of usability, impact resistance, and providing a glossy skin feel, the content of the hydrophobic spherical inorganic particles relative to the total amount of spherical inorganic particles in the cosmetic is preferably 35% by mass or more, 40% by mass or more, or 45% by mass or more, and preferably 65% ​​by mass or less, 60% by mass or less, or 55% by mass or less.

[0046] (Hydrophilic Spherical Inorganic Particles) Untreated spherical inorganic particles that have not been treated with a surface treatment agent capable of exhibiting hydrophobic properties as described above can typically be used as hydrophilic spherical inorganic particles. Alternatively, the spherical inorganic particles described above may be treated with a surface treatment agent capable of exhibiting hydrophilic properties, for example, and used as hydrophilic spherical inorganic particles. Among these, untreated spherical inorganic particles are preferred as hydrophilic spherical inorganic particles from the viewpoints of usability, impact resistance, and providing a glossy skin feel. The hydrophilic spherical inorganic particles can be used alone or in combination of two or more kinds.

[0047] As with hydrophilic plate-like mica, examples of surface treatment agents capable of exhibiting hydrophilic properties include silane compounds having a hydrophilic organic group (e.g., hydrophilic silane compounds having a polyoxyethylene chain). The surface treatment agents can be used alone or in combination of two or more.

[0048] The content of the hydrophilic spherical inorganic particles can be 5.0% by mass or more, 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, 30% by mass or more, 35% by mass or more, 40% by mass or more, 45% by mass or more, or 50% by mass or more, relative to the total amount of spherical inorganic particles in the cosmetic, and can be 75% by mass or less, 70% by mass or less, 65% by mass or less, 60% by mass or less, 55% by mass or less, or 50% by mass or less. The hydrophilic spherical inorganic particles can be appropriately blended into the cosmetic within such ranges. In some embodiments, from the viewpoints of usability, impact resistance, and providing a glossy skin feel, the content of the hydrophilic spherical inorganic particles relative to the total amount of spherical inorganic particles in the cosmetic is preferably 35% by mass or more, 40% by mass or more, or 45% by mass or more, and preferably 65% ​​by mass or less, 60% by mass or less, or 55% by mass or less.

[0049] <Optional Components> The solid cosmetic powder preparation of the present disclosure may contain various components as appropriate, provided that they do not adversely affect the effects of the present disclosure. Examples of such optional components include components other than those described above that are used in cosmetics, pharmaceuticals, etc. Specific examples include surfactants, water-soluble polymers, oil-soluble polymers, thickeners, film-forming agents, UV absorbers, anti-fading agents, sequestering agents, preservatives, moisturizers, polymer emulsions, pH adjusters, deodorants, disinfectants, antioxidants, antioxidant aids, excipients, fragrances, colorants (e.g., pigments, coloring materials, and dyes not included in the above-mentioned platy mica and spherical inorganic particles), oils, and water. The optional components may be used alone or in combination of two or more.

[0050] (Coloring Material) In some embodiments, the water-moistenable powder solid cosmetic preparation of the present disclosure includes a coloring material.

[0051] Pigments can be used as colorants, and such pigments can also be referred to as "pigment-grade particles." Pigment-grade particles can be distinguished from particles other than pigment-grade particles, for example, by their size. For example, the size of pigment-grade particles can be defined by the average particle diameter calculated by static light scattering, and such a size can be, for example, 100 nm or more, 150 nm or more, 200 nm or more, 250 nm or more, 300 nm or more, 350 nm or more, or 400 nm or more, or 800 nm or less, 700 nm or less, 600 nm or less, 500 nm or less, 400 nm or less, or 300 nm or less.

[0052] Pigments that can be used as colorants include, for example, inorganic pigments (sometimes referred to as "inorganic colored pigments"). Examples of inorganic pigments include inorganic white pigments (e.g., titanium dioxide, zinc oxide); inorganic red pigments (e.g., iron oxide (red iron), iron titanate); inorganic brown pigments (e.g., γ-iron oxide); inorganic yellow pigments (e.g., yellow iron oxide, ochre); inorganic black pigments (e.g., black iron oxide, low-order titanium oxide); inorganic purple pigments (e.g., mango violet, cobalt violet); inorganic green pigments (e.g., chromium oxide, chromium hydroxide, cobalt titanate); and inorganic blue pigments (e.g., ultramarine, Prussian blue). Other examples include glitter powders.

[0053] Organic pigments (sometimes referred to as "organic coloring pigments") and / or dyes can also be used as colorants. Examples of organic pigments include zirconium, barium, and aluminum lakes, specifically, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 228, Red No. 405, Orange No. 203, Orange No. 204, Yellow No. 205, Yellow No. 401, and Blue No. 404, as well as Red No. 3, Red No. 104, Red No. 106, Red No. 227, Red No. 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3, and Blue No. 1.

[0054] Examples of pigments include natural pigments, specifically, for example, chlorophyll and β-carotene.

[0055] (Oil) In some embodiments, the water-moistenable powder solid cosmetic preparation of the present disclosure contains an oil as an oil component. The oil can function as a binder for the water-moistenable powder solid cosmetic preparation of the present disclosure.

[0056] In the present disclosure, "oil" refers to oils used in the field of solid powder cosmetics, such as liquid oils and fats, solid oils and fats, waxes, hydrocarbon oils, higher fatty acids, higher alcohols, ester oils, silicone oils, etc. The oils may be used alone or in combination of two or more types.

[0057] Examples of liquid oils and fats include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, camellia oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, Japanese kaya oil, rice bran oil, Chinese tung oil, Japanese tung oil, jojoba oil, germ oil, and triglycerin.

[0058] Examples of solid fats and oils include cocoa butter, coconut oil, hardened coconut oil, palm oil, palm kernel oil, Japan wax kernel oil, hardened oil, Japan wax, and hardened castor oil.

[0059] Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ivory wax, spermaceti wax, montan wax, rice bran wax, lanolin, kapok wax, acetated lanolin, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, ceresin, and microcrystalline wax.

[0060] Hydrocarbon oils include, for example, liquid paraffin, ozokerite, squalane, pristane, paraffin, squalene, and petrolatum.

[0061] Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tall acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).

[0062] Examples of higher alcohols include straight-chain alcohols (e.g., lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol, etc.); and branched-chain alcohols (e.g., monostearyl glycerin ether (batyl alcohol), 2-decyltetradecynol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, octyldodecanol, etc.).

[0063] Examples of ester oils include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid esters, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, tetra-2-ethyl Pentaerythritol hexanoate, glycerin tri-2-ethylhexanoate, glycerin trioctanoate, glycerin triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glycerin trimyristate, tri-2-heptylundecanoic acid glyceride, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L Examples of suitable glyceryl triglycerides include 2-octyldodecyl lauroyl glutamate (sometimes referred to as "phytosteryl / octyldodecyl lauroyl glutamate"), di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, triethyl citrate, and caprylic / capric triglyceride. Of these, diisostearyl malate is preferred from the viewpoints of ease of use, impact resistance, and the provision of a glossy skin feel.

[0064] Examples of silicone oils include linear polysiloxanes (e.g., dimethylpolysiloxane (sometimes referred to as "dimethicone"), methylphenylpolysiloxane (sometimes referred to as "diphenyldimethicone"), diphenylpolysiloxane, etc.); cyclic polysiloxanes (e.g., dodecamethylcyclohexasiloxane, etc.), silicone resins forming a three-dimensional network structure, silicone rubber, various modified polysiloxanes (amino-modified polysiloxanes, polyether-modified polysiloxanes, alkyl-modified polysiloxanes, alcohol-modified polysiloxanes (e.g., (stearoxymethicone / dimethicone) copolymers), and fluorine-modified polysiloxanes, etc.). Of these, methylphenylpolysiloxanes are preferred from the viewpoints of ease of use, impact resistance, and the provision of a glossy skin feel. Alcohol-modified polysiloxanes (e.g., (stearoxymethicone / dimethicone) copolymers) may also fall under the category of semi-solid oils, which will be described later.

[0065] In addition to the above, semi-solid oils can also be used as the oil. Semi-solid oils are preferred from the viewpoints of ease of use, impact resistance, and providing a glossy skin feel. Here, in the present disclosure, "semi-solid oil" refers to oils having a hardness of 0.1 to 10 N at 25°C. This hardness is measured using a rheometer manufactured by Rheotec, with a pressure-sensitive shaft of 5φ, a penetration speed of 2 cm / min, and a penetration depth of 3 mm.

[0066] The semi-solid oil component is preferably a dimer dilinoleate ester, which is a dimer dilinoleate-phytosterol-higher alcohol ester in which the alcohol residue comprises a phytosteryl group and a linear higher alcohol residue having 16 to 22 carbon atoms, or is preferably a dimer dilinoleate (phytosteryl / behenyl) in which the alcohol residue comprises a phytosteryl group and a behenyl alcohol residue.

[0067] Specific examples of semi-solid oils include dipentaerythrityl hexa(hydroxystearate / stearic acid / rosin acid), dipentaerythrityl hexa(hydroxystearate / stearic acid / rosin acid), dipentaerythrityl (hydroxystearate / isostearate), dipentaerythrityl hexahydroxystearate, phytosteryl macadamiate, phytosteryl / isostearyl / cetyl / stearyl / benzyl dimer dilinoleate, and phytosteryl isostearyl / cetyl / stearyl / benzyl dimer dilinoleate. Examples of suitable glyceryl compounds include phytosteryl / isostearyl / cetyl / stearyl / behenyl dimer dilinoleate, bis(behenyl / isostearyl / phytosteryl) dimer dilinoleate, C10-18 triglyceride, pentaerythrityl tetra(behenate / benzoate / ethylhexanoate), phytosteryl / behenyl dimer dilinoleate, and macadamia nut oil polyglyceryl-6 esters behenate. Among these, pentaerythrityl tetra(behenate / benzoate / ethylhexanoate) and phytosteryl macadamia nut fatty acid are preferred from the viewpoints of ease of use, impact resistance, and providing a glossy skin feel.

[0068] Organic UV absorbers can also be considered oils. Examples of such UV absorbers include ethylhexyl methoxycinnamate, octocrylene, polysilicone-15, t-butyl methoxydibenzoylmethane, ethylhexyl triazone, bisethylhexyloxyphenol methoxyphenyl triazine, diethylaminohydroxybenzoyl hexyl benzoate, oxybenzone-3, methylenebisbenzotriazolyltetramethylbutylphenol, homosalate, and ethylhexyl salicylate. The UV absorbers can be used alone or in combination of two or more.

[0069] The amount of oil to be blended is not particularly limited, and can be, for example, 0.1% by mass or more, 0.3% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 3.0% by mass or more, 5.0% by mass or more, more than 5.0% by mass, 6.0% by mass or more, 8.0% by mass or more, or 10% by mass or more, relative to the total amount of the cosmetic. There is no particular upper limit to the amount to be blended, and it can be, for example, 20% by mass or less, 17% by mass or less, 15% by mass or less, 13% by mass or less, or 10% by mass or less. The oil can be blended into the cosmetic within this range as appropriate.

[0070] (Other) In some embodiments, the water-wet powder solid cosmetic preparation of the present disclosure may contain resin powder and / or talc. However, the content of these materials may be 10% by mass or less, 8.0% by mass or less, 5.0% by mass or less, 3.0% by mass or less, 1.0% by mass or less, 0.5% by mass or less, or 0.1% by mass or less, respectively, and these materials may not necessarily be blended into the cosmetic preparation. Here, "resin powder" refers to a powder made of a resin material that is solid at room temperature (e.g., 25°C). Examples of such resin materials include polyamides (e.g., nylon), (meth)acrylic acid esters, polyolefins (e.g., polyethylene), polystyrene, polyesters (e.g., polyethylene terephthalate), polyurethanes, silicone elastomers, silicones, and fluororesins. The form of the powder is not particularly limited, and examples include particles and fibers.

[0071] Uses of the Water-Moistened Powder Solid Cosmetic Preparation There are no particular limitations on the uses of the water-moistened powder solid cosmetic preparation of the present disclosure. Examples of such uses include foundation (e.g., powdery foundation), eye shadow, blush, body powder, perfume powder, baby powder, deodorant powder, and face powder. The water-moistened powder solid cosmetic preparation of the present disclosure is excellent in usability and impact resistance, and can provide a glossy skin feel, making it suitable for use as a foundation.

[0072] <<Method for Producing a Water-Wet Solid Cosmetic Preparation in Powder>> The solid cosmetic preparation in powder form according to the present disclosure can be produced by a water-wet molding method using water as the dispersion medium for the slurry. Note that the various components described above can be used in the same manner in the method for producing a solid cosmetic preparation in powder form.

[0073] This production method includes (1) blending the above-described mixture containing plate-like mica, spherical inorganic particles, and an oily component as a binder with a volatile dispersion medium to obtain a slurry, and (2) filling this slurry into a container and then removing the volatile dispersion medium. The volatile dispersion medium contains 50% or more by mass of water relative to the total amount of the dispersion medium. The water content in the dispersion medium can be greater than 50% by mass, 60% or more by mass, 70% or more by mass, 80% or more by mass, or 90% or more by mass relative to the total amount of the dispersion medium, and can be 100% or less by mass or less by mass. The dispersion medium may contain components other than water. Examples of such components include lower alcohols such as ethanol.

[0074] In the water wet molding method, in addition to the above-mentioned steps (1) and (2), at least one step selected from the group consisting of filling the slurry into a container, removing the volatile dispersion medium from the container filled with the slurry, and drying can be further carried out.

[0075] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Unless otherwise specified, the blending amounts are expressed in mass %. Furthermore, the various evaluation methods described in the examples are not limited to the cosmetic preparations described in the examples, and can be similarly performed on cosmetic preparations containing the above-mentioned components.

[0076] Reference Examples, Examples 1 to 14, and Comparative Examples 1 to 5 The solid cosmetic preparations in powder form obtained by the formulations shown in Tables 1 and 2 and the production methods shown below were evaluated as follows, and the results are shown in Tables 1 and 2. Here, this solid cosmetic preparation in powder form corresponds to a pressed powder type foundation.

[0077] Evaluation Method

[0078] (Usability Test) A comprehensive evaluation of usability was conducted by a panel of five experts. The evaluation method consisted of collecting a cosmetic with a foundation puff and applying it to the face, and evaluating the usability, i.e., the soft and easy spreadability, according to the following criteria. Here, ratings A to C can be considered as passing, and rating D as failing: A: 5 out of 5 people responded that they felt the soft and easy spreadability. B: 4 out of 5 people responded that they felt the soft and easy spreadability. C: 3 out of 5 people responded that they felt the soft and easy spreadability. D: 0 to 2 out of 5 people responded that they felt the soft and easy spreadability.

[0079] (Impact Resistance Test) Five cosmetic test samples were prepared and dropped from a height of 30 cm onto a concrete floor. The number of times the test samples were dropped until defects in appearance such as cracks, fissures, fissures, or peeling occurred was counted. In Tables 1 and 2, a drop of 5 or more times is marked "A," a drop of 3 to 4 times is marked "B," and a drop of 2 times or less is marked "C." Here, ratings of A and B can be considered as passing, and a rating of C as failing.

[0080] (Finish Test) A comprehensive evaluation of finish was conducted by a panel of five experts. The evaluation method was to take up a cosmetic product with a foundation puff and apply it to the face, and evaluate the finish, i.e., the glossy skin feel, according to the following criteria. Here, A and B ratings can be considered as passing, and C rating as failing: A: 5 out of 5 people answered that the skin felt glossy. B: 3 to 4 out of 5 people answered that the skin felt glossy. C: 0 to 2 out of 5 people answered that the skin felt glossy.

[0081] <Method for manufacturing a powder solid cosmetic product: water-wet molding method> (Reference Example) The specified amounts of powder components, oil components, and additives shown in Table 1 were mixed in a Henschel mixer while heating, and then pulverized using a pulverizer to obtain a uniform mixture. To this mixture, an equal amount of 7% ethanol water was added and stirred to prepare a slurry solution. The obtained slurry solution was filled into a roughly square (approximately 3 cm x approximately 4 cm) resin dish container with a depth of approximately 5 mm, after which the water and ethanol were removed and the container was dried to obtain a conventional type of powder solid cosmetic product as a Reference Example.

[0082] Comparative Example 1 A solid cosmetic powder preparation of Comparative Example 1 was obtained in the same manner as in Reference Example, except that the formulation was changed to that shown in Table 1.

[0083] (Comparative Example 2) The powder components, oil components, and additives in the amounts shown in Table 1 were mixed in a Henschel mixer while heating, and then pulverized using a pulverizer to obtain a uniform mixture. 80 parts by mass of 7% ethanol water were added to 100 parts by mass of this mixture, and the mixture was stirred to prepare a slurry solution. The obtained slurry solution was filled into a roughly square (approximately 3 cm x approximately 4 cm) resin dish container with a depth of approximately 5 mm, and the water and ethanol were removed and the container was dried to obtain a powder solid cosmetic product of Comparative Example 2.

[0084] (Comparative Examples 3 to 5 and Examples 1 to 14) Solid cosmetic preparations in powder form were obtained in the same manner as in Comparative Example 2, except that the formulations were changed to those shown in Table 1 or Table 2.

[0085]

[0086]

[0087] <Results> As is clear from Table 1, it was confirmed that the cosmetics of Examples 1 to 3, which contained hydrophobic and hydrophilic plate-like mica and hydrophobic and hydrophilic spherical inorganic particles, were superior in usability and impact resistance compared to the cosmetics of Comparative Examples 1 to 5, which lacked one of the components.

[0088] The cosmetic of the Reference Example corresponds to a conventional solid powder cosmetic containing resin powder and talc. This cosmetic was also found to be excellent in usability and impact resistance, but inferior in finish. On the other hand, the solid powder cosmetic having the configuration of the present invention is excellent in usability, impact resistance, and finish, and therefore can be said to be comprehensively superior to conventional solid powder cosmetic containing resin powder and talc.

[0089] As can be seen from Table 2, it was also found that the useability, impact resistance, and finish are further improved when the oil contains at least one selected from the group consisting of diisostearyl malate, pentaerythrityl tetra(behenate / benzoate / ethylhexanoate), and phytosteryl macadamiate.

Claims

1. A water-based powder solid cosmetic containing plate-shaped mica and spherical inorganic particles, wherein the plate-shaped mica includes hydrophobic plate-shaped mica and hydrophilic plate-shaped mica, and the spherical inorganic particles include hydrophobic spherical inorganic particles and hydrophilic spherical inorganic particles.

2. The cosmetic according to claim 1, wherein the content of the plate-shaped mica is 35% by mass or more based on the total amount of the cosmetic.

3. The cosmetic according to claim 2, wherein the content of the hydrophobic plate-shaped mica is 25 to 95% by mass based on the total amount of the plate-shaped mica.

4. The cosmetic according to claim 1 or 2, wherein the content of the spherical inorganic particles is 4.0% by mass or more based on the total amount of the cosmetic.

5. The cosmetic according to claim 4, wherein the content of the hydrophobic spherical inorganic particles is 25 to 95% by mass based on the total amount of the spherical inorganic particles.

6. The cosmetic according to claim 1 or 2, wherein the spherical inorganic particles contain at least one selected from the group consisting of silica, calcium carbonate, and glass.

7. The cosmetic according to claim 1 or 2, which is a foundation.

8. A method for manufacturing the cosmetic according to claim 1 or 2, comprising: formulating a mixture containing the plate-shaped mica, the spherical inorganic particles, and an oily component as a binder into a volatile dispersion medium to obtain a slurry; and after filling the slurry into a container, removing the volatile dispersion medium, wherein the volatile dispersion medium contains 50% by mass or more of water based on the total amount of the dispersion medium.

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