Water-wet powder solidification cosmetic

Abstract

The present invention provides a novel water-wet powder solid cosmetic which is excellent in use and impact resistance. The water-wet powder solid cosmetic of the present disclosure contains plate-like mica and spherical inorganic particles, wherein 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.

Description

Technical Field

[0001] This disclosure relates to water-based wet powder solid cosmetics. Background Technology

[0002] Various powder solid cosmetics containing powder components and their manufacturing methods have been developed in the prior art that can be used in foundations and the like.

[0003] Patent Document 1 discloses a method for manufacturing a solid powder cosmetic, which involves dissolving or dispersing a mixture containing powder components and an oily component as a binder in a volatile dispersion medium, filling the container, and then removing the volatile dispersion medium. The volatile dispersion medium uses water as the main dispersion medium and a water-soluble organic solvent as a secondary dispersion medium, and has a mass percentage of 0 to 30% in the volatile dispersion medium. The contact angle of the volatile dispersion medium is 125 degrees or more relative to the mixture dissolved or dispersed in the volatile dispersion medium.

[0004] Patent document 2 discloses a solid powder cosmetic containing organic modified clay minerals and silicone oil.

[0005] Patent document 3 discloses a method for manufacturing a solid powder cosmetic. The solid powder cosmetic is a cosmetic that does not contain microplastic beads. The cosmetic base material and solvent are mixed to form a paste. After filling a container, the solvent is removed. The cosmetic base material is prepared by mixing (A) fluorine-treated talc, (B) hydrophobically treated silica, (C) hydrophobically treated particulate titanium dioxide powder, and (D) an oil containing a water-retaining oil that can retain water in an amount equal to or greater than its own weight.

[0006] Patent document 4 discloses a solid powder cosmetic, which is made by mixing a cosmetic base material and a solvent to form a paste. After filling a container, the solvent is removed. The cosmetic base material is prepared by mixing (A) a powder containing spherical non-porous silica with an oil.

[0007] Existing technical documents

[0008] Patent documents

[0009] Patent Document 1: Japanese Patent Application Publication No. 2016-037496

[0010] Patent Document 2: Japanese Patent Application Publication No. 2002-220316

[0011] Patent Document 3: Japanese Patent Application Publication No. 2018-177640

[0012] Patent Document 4: Japanese Patent Application Publication No. 2020-093996 Summary of the Invention

[0013] The problem that the invention aims to solve

[0014] Powdered solid cosmetics can be formed, for example, using dry molding or wet molding methods. Among wet molding methods, water-based wet molding is known. However, if powdered solid cosmetics are obtained using this water-based wet molding method, adverse conditions related to usability and impact resistance sometimes occur.

[0015] Therefore, the subject of this disclosure is to provide new water-based wet powder solid cosmetics with excellent usability and impact resistance.

[0016] Methods for solving problems

[0017] <Option 1>

[0018] A water-soluble powder-solid cosmetic comprising plate-like mica and spherical inorganic particles. The aforementioned tabular mica includes hydrophobic tabular mica and hydrophilic tabular mica, and, The aforementioned spherical inorganic particles include hydrophobic spherical inorganic particles and hydrophilic spherical inorganic particles.

[0019] Option 2

[0020] According to the cosmetic material described in Scheme 1, the content of the above-mentioned tabular mica is 35% by mass or more relative to the total amount of the cosmetic material.

[0021] Option 3

[0022] According to the cosmetic material described in Scheme 1 or 2, the content of the above-mentioned hydrophobic tabular mica is 25 to 95% by mass relative to the total amount of the above-mentioned tabular mica.

[0023] Option 4

[0024] According to any one of Schemes 1 to 3, the content of the above-mentioned spherical inorganic particles in the cosmetic material is 4.0% by mass or more relative to the total amount of the cosmetic material.

[0025] Option 5

[0026] According to any one of Schemes 1 to 4, the content of the above-mentioned hydrophobic spherical inorganic particles in the cosmetic material is 25 to 95% by mass relative to the total amount of the above-mentioned spherical inorganic particles.

[0027] <Option 6>

[0028] According to any one of Schemes 1 to 5, the spherical inorganic particles comprise at least one selected from silicon dioxide, calcium carbonate, and glass.

[0029] <Option 7>

[0030] The cosmetic material according to any one of Schemes 1 to 6 is a foundation.

[0031] <Option 8>

[0032] The method for manufacturing a cosmetic material according to any one of Schemes 1 to 7 comprises: A slurry is obtained by mixing a mixture comprising the above-mentioned plate-like mica, the above-mentioned spherical inorganic particles, and an oily component as a binder in a volatile dispersion medium; and After filling the container with the above slurry, the above volatile dispersion medium is removed. The aforementioned volatile dispersion medium, relative to the total amount of the dispersion medium, contains more than 50% by mass of water.

[0033] The effects of the invention

[0034] According to this disclosure, novel water-based wet powder solid cosmetics with excellent usability and impact resistance can be provided. Attached Figure Description

[0035] Figure 1 (a) is a schematic diagram of mica and inorganic particles in a conventional powder solid cosmetic prepared by a wet molding method using hydrophilic plate-shaped mica and hydrophilic spherical inorganic particles, and (b) is a schematic diagram of mica and inorganic particles in a powder solid cosmetic prepared by a wet molding method according to an embodiment of the present disclosure. Detailed Implementation

[0036] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The present disclosure is not limited to the following embodiments, and various modifications can be made within the scope of the original intent of the invention.

[0037] The disclosed water-based wet powder solid cosmetic comprises 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.

[0038] Although not limited by the principle, the working principle of the powder solid cosmetic disclosed herein, which is believed to have excellent usability and impact resistance even when prepared by a wet molding method, is as follows.

[0039] For example, it can be considered that when only hydrophilic plate-shaped mica and hydrophilic spherical inorganic particles are used, they readily bond with each other, thus making them suitable for manufacturing using a wet molding method. Figure 1As shown in (a), it is easy to integrate. As a result, it can be considered that because the tabular mica and spherical inorganic particles are prone to localized presence in the cosmetic, the resulting cosmetic does not achieve a soft usability and good impact resistance. This tendency also exists when only hydrophobic tabular mica and hydrophobic spherical inorganic particles are used.

[0040] On the other hand, it can be considered that the powdered solid cosmetics disclosed herein are like Figure 1 As shown in (b), in addition to the composite of hydrophilic plate-like mica and hydrophilic spherical inorganic particles, there is also a composite of hydrophobic plate-like mica and hydrophobic spherical inorganic particles, which act in a way that inhibits further integration between them. As a result, it can be considered that because the plate-like mica and spherical inorganic particles are well-balanced and disposed within the cosmetic, a soft usability and good impact resistance are obtained in the cosmetic.

[0041] Furthermore, when only tabular mica (e.g., hydrophilic tabular mica) is used, several tabular mica particles come into contact with each other on their surfaces. As a result, the resistance between the contacting mica particles increases, making it difficult to achieve a soft and fluffy feel. The powdered solid cosmetic disclosed herein contains spherical inorganic particles in addition to tabular mica. As a result, since the contact between the mica surfaces can be reduced or suppressed, this undesirable situation can also be improved.

[0042] It should be noted that, in the past, when producing powdered solid cosmetics with excellent usability and impact resistance using the wet molding method, resin powder and talc were sometimes mixed in. The powdered solid cosmetics of this disclosure achieve good usability and impact resistance even without using such materials.

[0043] Furthermore, as described above, the powder solid cosmetic of this disclosure contains a balanced arrangement of plate-like mica and spherical inorganic particles. When this cosmetic is applied to the skin, compared to conventional cosmetics obtained by wet molding methods, the planar surfaces of the plate-like mica, which contribute to gloss, are easily arranged approximately parallel to the skin. As a result, the powder solid cosmetic of this disclosure can also provide a luminous skin feel as an additional effect.

[0044] The terms used in this disclosure are defined as follows.

[0045] In this disclosure, "usability" refers to the usability of powder solid cosmetics, such as the soft feel of the product, the ease of taking the cosmetic from a compact box filled with powder solid cosmetics using a powder puff (the smoothness of the cosmetic), or the ease of applying the obtained cosmetic to the skin (e.g., gently spreading the cosmetic onto the skin).

[0046] Aqueous wet powder solid cosmetics

[0047] The disclosed powder solid cosmetic contains plate-like mica and spherical inorganic particles as powder components, and can be in the form of, for example, a pressed powder.

[0048] <Tabular mica>

[0049] The powdered solid cosmetic disclosed herein comprises hydrophobic and hydrophilic plate mica as plate mica. Plate mica can be used alone or in combination of two or more. Here, "hydrophobic" in this disclosure refers to a property of low affinity for water, while "hydrophilic" refers to a property of high affinity for water. These properties can be evaluated, for example, by adding 50g of ion-exchanged water and 0.1g of evaluation powder to a transparent, sealed container, storing it at 50°C for one day, and then visually observing it. Specifically, if most of the evaluation powder (e.g., more than 50% of the evaluation powder) is present near the surface of the ion-exchanged water (e.g., in the area from the water surface to approximately 1cm underwater), the powder can be evaluated as "hydrophobic." Furthermore, if most of the evaluation powder (e.g., more than 50% of the evaluation powder) is not present near the surface of the ion-exchanged water but dispersed in the water, the powder can be evaluated as "hydrophilic." Additionally, if the specific gravity of the powder being evaluated is greater than that of the mica (e.g., specific gravity exceeding 3.0 g / cm³), the powder can be evaluated as "hydrophilic." 3 Or 5.0g / cm 3 In the above cases, "hydrophobicity" and "hydrophilicity" can also be evaluated using the following methods instead of such evaluation methods. For example, when ion-exchanged water is added dropwise to a container filled with powder at 25°C, the case where the water forms droplets that roll on the surface can be evaluated as "hydrophobic," and the case where the water does not form droplets but merges with the surface can be evaluated as "hydrophilic."

[0050] The shape of tabular mica can be defined, for example, by its aspect ratio. The aspect ratio of tabular 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. Alternatively, it can be less than 200, less than 170, less than 150, less than 120, less than 100, less than 70, or less than 50. Tabular mica with aspect ratios within such ranges can be used alone or in combination of two or more types.

[0051] The aspect ratio can be calculated, for example, by observing under a microscope (e.g., scanning electron microscope) and extracting any 10 or more (e.g., 100) plate-shaped mica samples. The length (area direction) and width (thickness direction) of each plate-shaped mica sample are measured, and the length is divided by the width (i.e., length / width). The longest length is selected, and the shortest width is selected. The aspect ratio can be the average of the aspect ratios of any 10 or more (e.g., 100) plate-shaped mica samples.

[0052] In several embodiments, the average grain size of the tabular mica can be specified. Such an average grain 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; furthermore, it 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. Tabular mica with such an average grain size range can be used alone or in combination of two or more types. Here, the average grain size of the tabular mica can be specified as the average value of the diameter of the tabular mica optically measured by dynamic light scattering when the tabular mica is assumed to be spherical.

[0053] From the viewpoints of usability, impact resistance, and providing a glossy skin feel, the content of tabular mica (i.e., the combined amount of hydrophobic and hydrophilic tabular mica) relative to the total amount of cosmetic material 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. As an upper limit for such content, for example, it can be 60% by mass or less, 57% by mass or less, 55% by mass or less, or 53% by mass or less. Tabular mica can be appropriately blended in cosmetic materials within this range.

[0054] Mica (also sometimes called "mica"), which constitutes plate-like mica, can be exemplified by, for example, synthetic mica, calcined mica, and uncalcined mica. Specifically, examples include, for instance, sericite, muscovite, phlogopite, synthetic mica, synthetic phlogopite iron, red mica, biotite, calcined sericite, calcined muscovite, and calcined phlogopite. Furthermore, examples include, mica coated with inorganic substances such as inorganic oxides, such as titanium oxide-coated mica, and iron oxide-coated mica such as red titanium oxide-coated mica, which is mica coated with iron oxide and titanium oxide. In addition, examples include plate-like particles containing mica components, such as mica titanium, iron oxide-coated mica titanium, magenta-coated mica titanium, magenta / navy-coated mica titanium, iron oxide / magenta-treated mica titanium, navy-treated mica titanium, iron oxide / navy-treated mica titanium, chromium oxide-treated mica titanium, and black titanium oxide-treated mica titanium.

[0055] (Hydrophobic tabular mica)

[0056] Hydrophobic tabular mica can be obtained by treating the aforementioned mica, for example, with a surface treatment agent that imparts hydrophobic properties. Hydrophobic tabular mica can be used alone or in combination of two or more types.

[0057] Examples of such surface treatment agents include, for example, higher fatty acids, metallic soaps, oils, waxes, organosilicon compounds (e.g., carboxydecyltrisiloxane, polydimethylsiloxane, acrylic-organosilicon graft copolymers), fluorine compounds, hydrocarbons, surfactants, fatty acid dextrin esters (e.g., palmitic dextrin ester), amino acids (lauroyl lysine), distearate dimethyl ammonium chloride, and distearate dimethyl ammonium chloride. Here, higher fatty acids can refer to saturated or unsaturated fatty acids with 6 or more carbon atoms; specifically, myristic acid and stearic acid are examples. Surface treatment agents can be used alone or in combination of two or more.

[0058] The content of hydrophobic tabular mica relative to the total amount of tabular mica in cosmetics can be 25% or more by mass, 30% or more by mass, 40% or more by mass, 50% or more by mass, 55% or more by mass, 60% or more by mass, 65% or more by mass, 70% or more by mass, or 75% or more by mass. Alternatively, it can be less than 95% by mass, less than 90% by mass, less than 85% by mass, less than 80% by mass, less than 75% by mass, less than 70% by mass, less than 65% by mass, less than 60% by mass, less than 55% by mass, or less than 50% by mass. Hydrophobic tabular mica can be appropriately blended into cosmetics within these ranges. In several embodiments, from the viewpoints of usability, impact resistance, and providing a glossy skin feel, the content of hydrophobic tabular mica relative to the total amount of tabular mica in the cosmetic is preferably 50% or more by mass, 55% or more by mass, or 60% or more by mass, more preferably 65% ​​or more by mass, 70% or more by mass, or 75% or more by mass, and even more preferably 90% or less by mass, 85% or less by mass, or 80% or less by mass.

[0059] (Hydrophilic tabular mica)

[0060] Untreated tabular mica, which has not been treated with a surface treatment agent that exhibits hydrophobic properties as described above, can typically be used as hydrophilic tabular mica. Alternatively, a substance that has been treated with a surface treatment agent that exhibits hydrophilic properties, for example, can be used as hydrophilic tabular mica. Among these, from the viewpoints of usability, impact resistance, and providing a glossy, skin-like feel, untreated tabular mica is preferred as hydrophilic tabular mica. Hydrophilic tabular mica can be used alone or in combination of two or more types.

[0061] Examples of surface treatment agents capable of exhibiting hydrophilic properties include, for example, silane compounds having hydrophilic organic groups (e.g., hydrophilic silane compounds having polyoxyethylene chains). Surface treatment agents can be used alone or in combination of two or more.

[0062] The content of hydrophilic plate mica relative to the total amount of plate mica in cosmetics can be 5.0% or more by mass, 10% or more by mass, 15% or more by mass, 20% or more by mass, 25% or more by mass, 30% or more by mass, 35% or more by mass, 40% or more by mass, 45% or more by mass, 50% or more by mass, 55% or more by mass, 60% or more by mass, 65% or more by mass, 70% or more by mass, or 75% or more by mass. Alternatively, it can be less than 75% by mass, less than 70% by mass, less than 65% by mass, less than 60% by mass, less than 55% by mass, less than 50% by mass, less than 45% by mass, less than 40% by mass, less than 35% by mass, less than 30% by mass, or less than 25% by mass. Hydrophilic plate mica can be appropriately blended into cosmetics within these ranges. In several embodiments, from the viewpoints of usability, impact resistance, and providing a glossy skin feel, the content of hydrophilic plate mica relative to the total amount of plate 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, and preferably 35% by mass or less, 30% by mass or less, or 25% by mass or less.

[0063] <Spherical Inorganic Particles>

[0064] The powdered solid cosmetic disclosed herein comprises 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.

[0065] The shape of spherical inorganic particles can be defined, for example, by sphericity. The sphericity of spherical inorganic particles can be, for example, 0.80 or higher, 0.85 or higher, 0.90 or higher, 0.95 or higher, or 0.97 or higher. As an upper limit for such sphericity, it can be 1.0 or lower, or less than 1.0.

[0066] Sphericity can be measured, for example, by observing under a microscope (e.g., a scanning electron microscope) and extracting any number of 10 or more (e.g., 100) spherical inorganic particles. The sphericity can be calculated by 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 the average of the sphericity of any number of 10 or more (e.g., 100) spherical inorganic particles.

[0067] There are no particular limitations on the size of the spherical inorganic particles. 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 also be 50 μm or less, 30 μm or less, 20 μm or less, 15 μm or less, or 10 μm or less. Spherical inorganic particles with average particle sizes in such ranges can be used alone or in combination of two or more.

[0068] The average particle size can be defined as the average diameter of the particles optically measured by dynamic light scattering when the particle shape is assumed to be spherical.

[0069] From the viewpoints of usability, impact resistance, and providing a glossy skin feel, the content of spherical inorganic particles (i.e., the combined amount of hydrophobic and hydrophilic spherical inorganic particles) relative to the total amount of the cosmetic is 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; furthermore, it 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. Spherical inorganic particles can be appropriately blended in cosmetics within such a range.

[0070] As inorganic materials constituting spherical inorganic particles, silica, calcium carbonate, and glass are preferred from the viewpoints of usability, impact resistance, and providing a glossy skin feel; silica and calcium carbonate are more preferred; and silica is particularly preferred. Inorganic materials can be used alone or in combination of two or more. Both porous and non-porous silica can be used as silica, but porous silica is preferred from the viewpoints of usability, impact resistance, and providing a glossy skin feel. Here, porous silica refers to silica with a large number of pores on its surface compared to silica used as non-porous silica in the cosmetics field; for example, it refers to silica whose BET specific surface area, measured by the BET method (gas adsorption method), exceeds 50 m². 2 / g, 100m 2 / g or more, 300m 2 / g or more, 500m 2 / g or above or 700m 2 / g or more of silica. There is no particular limit to the upper limit of such BET specific surface area; for example, it can be 2,000 m². 2 / g or less, 1,500m 2 / g or less, 1,000m 2 / g or less or 800m 2 / g or less.

[0071] (Hydrophobic spherical inorganic particles)

[0072] Hydrophobic spherical inorganic particles can be obtained by treating the aforementioned spherical inorganic particles, for example, with a surface treatment agent capable of exhibiting hydrophobic properties. Hydrophobic spherical inorganic particles can be used alone or in combination of two or more.

[0073] Similar to hydrophobic plate-like mica, examples of such surface treatment agents include, for example, higher fatty acids, metallic soaps, oils, waxes, organosilicon compounds (e.g., carboxydecyltrisiloxane, polydimethylsiloxane, acrylic-organosilicon graft copolymers), fluorinated compounds, hydrocarbons, surfactants, fatty acid dextrin esters (e.g., palmitic dextrin ester), amino acids (lauroyl lysine), distearate dimethyl ammonium chloride, and distearate dimethyl ammonium chloride. Here, higher fatty acids can refer to saturated or unsaturated fatty acids with 6 or more carbon atoms; specifically, myristic acid, stearic acid, etc. Surface treatment agents can be used alone or in combination of two or more.

[0074] The content of hydrophobic spherical inorganic particles relative to the total amount of spherical inorganic particles in the cosmetic can be 25% or more by mass, 30% or more by mass, 35% or more by mass, 40% or more by mass, 45% or more by mass, or 50% or more by mass. Alternatively, it can be 95% or less by mass, 90% or less by mass, 85% or less by mass, 80% or less by mass, 75% or less by mass, 70% or less by mass, 65% or less by mass, 60% or less by mass, 55% or less by mass, or 50% or less by mass. Hydrophobic spherical inorganic particles can be appropriately blended in the cosmetic within such ranges. In several embodiments, from the viewpoints of usability, impact resistance, and providing a glossy skin feel, the content of hydrophobic spherical inorganic particles relative to the total amount of spherical inorganic particles in the cosmetic is preferably 35% or more by mass, 40% or more by mass, or 45% or more by mass. Furthermore, it is preferably 65% ​​or less by mass, 60% or less by mass, or 55% or less by mass.

[0075] (Hydrophilic spherical inorganic particles)

[0076] Untreated spherical inorganic particles, which are not treated with surface treatment agents that exhibit hydrophobic properties as described above, can typically be used as hydrophilic spherical inorganic particles. Alternatively, substances that have been treated with surface treatment agents that exhibit hydrophilic properties, such as those used on the aforementioned spherical inorganic particles, can be used as hydrophilic spherical inorganic particles. From the viewpoints of usability, impact resistance, and providing a glossy, skin-like feel, untreated spherical inorganic particles are preferred as hydrophilic spherical inorganic particles. Hydrophilic spherical inorganic particles can be used alone or in combination of two or more types.

[0077] Similar to hydrophilic plate mica, examples of surface treatment agents capable of exhibiting hydrophilic properties include, for example, silane compounds having hydrophilic organic groups (e.g., hydrophilic silane compounds having polyoxyethylene chains). Surface treatment agents can be used alone or in combination of two or more.

[0078] The content of hydrophilic spherical inorganic particles relative to the total amount of spherical inorganic particles in the cosmetic 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. Alternatively, it 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. Hydrophilic spherical inorganic particles can be appropriately blended in the cosmetic within such ranges. In several embodiments, from the viewpoints of usability, impact resistance, and providing a glossy skin feel, the content of 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; furthermore, it is preferably 65% ​​by mass or less, 60% by mass or less, or 55% by mass or less.

[0079] <Any Component>

[0080] The powdered solid cosmetic of this disclosure can be appropriately blended with various ingredients to a extent that does not adversely affect the effects of this disclosure. Examples of such ingredients include, for instance, other ingredients used in cosmetics and pharmaceuticals besides those described above. Specifically, examples include surfactants, water-soluble polymers, oil-soluble polymers, thickeners, film-forming agents, ultraviolet absorbers, fading inhibitors, metal ion blocking agents, preservatives, moisturizers, polymeric emulsions, pH adjusters, deodorants, bactericides, antioxidants, antioxidant auxiliaries, excipients, fragrances, colorants (e.g., pigments and dyes not included in the above-described plate-like mica and spherical inorganic particles), oils, and water. Any ingredient can be used alone or in combination of two or more.

[0081] (pigment)

[0082] In several practical embodiments, the water-based wet powder solid cosmetic disclosed herein includes colorants.

[0083] As a colorant, pigments can be used, and such pigments can also be called "pigment-grade particles." Pigment-grade particles can be distinguished from other particles, for example, by their size. For example, the size of pigment-grade particles can be defined by the average particle size calculated by the static light scattering method. Such sizes 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; and can also be 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.

[0084] As pigments that can be used as colorants, inorganic pigments (sometimes called "inorganic coloring pigments") can also be used, for example. Examples of inorganic pigments include, for example, inorganic white pigments (e.g., titanium dioxide, zinc oxide); inorganic red pigments (e.g., iron oxide (iron oxide red), iron titanate); inorganic brown pigments (e.g., γ-iron oxide); inorganic yellow pigments (e.g., iron oxide yellow, yellow ochre); inorganic black pigments (e.g., iron oxide black, low-valent titanium oxide); inorganic purple pigments (e.g., manganese violet, cobalt violet); inorganic green pigments (e.g., chromium oxide, chromium hydroxide, cobalt titanium oxide); and inorganic blue pigments (e.g., ultramarine, navy blue). In addition, glossy powders can be used.

[0085] Organic pigments (sometimes called "organic coloring pigments") and / or dyes can also be used as colorants. Examples of organic pigments include, for example, zirconium, barium, or aluminum lake pigments. Specifically, examples include organic pigments such as Red 201, Red 202, Red 204, Red 205, Red 220, Red 226, Red 228, Red 405, Orange 203, Orange 204, Yellow 205, Yellow 401, and Blue 404, as well as Red 3, Red 104, Red 106, Red 227, Red 230, Red 401, Red 505, Orange 205, Yellow 4, Yellow 5, Yellow 202, Yellow 203, Green 3, and Blue 1.

[0086] Examples of pigments include, for instance, natural pigments, specifically, chlorophyll and beta-carotene.

[0087] (oil content)

[0088] In several practical embodiments, the aqueous wet powder solid cosmetic of this disclosure includes oil as an oily component. The oil can act as a binder in the aqueous wet powder solid cosmetic of this disclosure.

[0089] The term "oil" in this disclosure refers to oils used in the field of powdered solid cosmetics, such as liquid oils, solid oils, waxes, hydrocarbon oils, higher fatty acids, higher alcohols, ester oils, and silicone oils. Oils can be used alone or in combination of two or more.

[0090] Examples of liquid oils include, for example, avocado oil, camellia seed oil, turtle oil, macadamia seed oil, corn oil, mink oil, olive fruit oil, rapeseed oil, egg yolk oil, sesame seed oil, peach kernel oil, wheat germ oil, camellia seed oil, castor seed oil, flaxseed oil, safflower seed oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, torreya seed oil, rice bran oil, white tung oil, Japanese tung oil, jojoba seed oil, germ oil, and triglycerides.

[0091] Examples of solid fats include cocoa butter, coconut oil, hardened coconut oil, palm oil, palm kernel oil, astragalus wax kernel oil, hardened oil, astragalus wax, and hardened castor oil.

[0092] Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, insect wax, whale wax, lignite wax, rice bran wax, lanolin, kapok wax, acetylated lanolin, lanolin oil, sugarcane wax, isopropyl lanolin fatty acid, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, purpuric resin wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol ester, POE hydrogenated lanolin alcohol ether, pure terrestrial wax, and microcrystalline wax.

[0093] Examples of hydrocarbon oils include, for example, liquid paraffin, ceresin, squalane, pterostilbene, paraffin, squalene, and petrolatum.

[0094] Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecenoic acid, tall oil, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).

[0095] Examples of higher alcohols include, for example, straight-chain alcohols (e.g., lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, a mixture of hexadecyl alcohol and octadecanol, etc.); branched-chain alcohols (e.g., monostearate glyceryl ether (squalyl alcohol), 2-decyltetradecynyl alcohol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, octyldodecanol, etc.).

[0096] Examples of ester oils include, for example, isopropyl myristate, cetyl octanoate, octyl-dodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyl octanoate, cetyl lactate, myristyl lactate, acetylated lanolin, isocetyl stearate, isocetyl isostearate, 12-hydroxystearate, and di-2-ethyl... Ethylene hexanoate, pentaerythritol fatty acid ester, N-alkyl diol monoisostearate, neopentyl glycol didecanoate, diisostearate malate, glyceryl di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, triglyceryl tri-2-ethylhexanoate, tricaprylic acid glyceride, triisopalmitoate, trimethylolpropane triisostearate Alkyl esters, 2-ethylhexanoate cetyl ester, 2-ethylhexyl palmitate, trimyristic acid glyceride, tri-2-heptylundecanoate glyceride, castor oil fatty acid methyl ester, oleic acid oleyl alcohol ester, acetylglycine ester, 2-heptylundecyl palmitate, diisobutyl adipic acid, N-lauroyl-L-glutamic acid-2-octyldodecyl ester (sometimes called "lauroyl glutamic acid (phytosterol / octyldodecyl) ester"), di-hexanoate The following are listed: 2-Hepyl undecyl ester, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyl decyl myristate, 2-hexyl decyl palmitate, 2-hexyl decyl adipic acid, diisopropyl sebacate, 2-ethylhexyl succinate, triethyl citrate, and triglycerides (caprylic / capric). Among these, diisostearyl malate is preferred from the viewpoints of usability, impact resistance, and providing a glossy finish.

[0097] Examples of silicone oils include, for example, chain-like polysiloxanes (e.g., dimethyl polysiloxane (also sometimes called "polydimethylsiloxane"), methylphenyl polysiloxane (also sometimes called "diphenyl polydimethylsiloxane"), diphenyl polysiloxane, etc.); cyclic polysiloxanes (e.g., dodecylcyclohexasiloxane, etc.); organosilicon resins forming a three-dimensional network structure; silicone rubber; and various modified polysiloxanes (amino-modified polysiloxanes, polyether-modified polysiloxanes, alkyl-modified polysiloxanes, alcohol-modified polysiloxanes (e.g., (stearyloxypolymethoxysiloxane / polydimethylsiloxane) copolymers and fluorinated polysiloxanes, etc.). Among these, methylphenyl polysiloxane is preferred from the viewpoints of usability, impact resistance, and the provision of a glossy, skin-like finish. It should be noted that alcohol-modified polysiloxanes (e.g., (stearyloxypolymethoxysiloxane / polydimethylsiloxane) copolymers) can also be equivalent to the semi-solid oils described later.

[0098] In addition to the above, semi-solid oils can also be used as oils. From the viewpoints of usability, impact resistance, and providing a glossy skin feel, semi-solid oils are preferred. Here, in this disclosure, "semi-solid oil" refers to an oil with a hardness of 0.1 to 10 N at 25°C. This hardness is measured using a rheometer manufactured by Leotec Co., Ltd., with a pressure-sensitive shaft of 5Φ, a needle penetration speed of 2 cm / min, and a needle penetration of 3 mm.

[0099] As a semi-solid oil, a dimer linoleate is preferred, and the dimer linoleic acid / phytosterol / higher alcohol ester is a dimeric linoleic acid / phytosterol / higher alcohol ester in which the alcohol residues include phytosterol groups and straight-chain higher alcohol residues having 16 to 22 carbon atoms. In addition, a dimer linoleic acid (phytosterol / behenol) ester is preferred, and the alcohol residues are composed of phytosterol groups and behenol residues.

[0100] Specific examples of semi-solid oils include, for instance, hexa(hydroxystearic acid / stearic acid / rosinic acid) dipentaerythritol ester, hexa(hydroxystearic acid / stearic acid / rosinic acid) dipentaerythritol ester, (hydroxystearic acid / isostearic acid) dipentaerythritol ester, hexahydroxystearic acid dipentaerythritol ester, macadamia oleate phytosterol ester, dimeric linoleic acid (phytosterol / isostearic acid / cetearyl alcohol / stearyl / behenol) ester, dimeric linoleic acid (phytosterol / isostearic acid / cetearyl alcohol / stearyl / behenol) ester, dimeric linoleic acid dimeric linoleoyl bis(behenol / isostearic acid / phytosterol) ester, tri(C10-18) fatty acid glycerides, and tetra(behenic acid / benzoic acid / ethylhexanoic acid). Pentaerythritol ester, dimeric linoleic acid (phytosterol / behenol) ester, and macadamia seed oil polyglycerol-6 ester behenate esters are preferred, considering usability, impact resistance, and the provision of a glossy skin feel. Among these, tetra(behenic acid / benzoic acid / ethylhexyl) pentaerythritol ester and macadamia oleic acid phytosterol ester are preferred.

[0101] Furthermore, organic UV absorbers can also be considered as oil components. Examples of such UV absorbers include, for instance, ethylhexyl methoxycinnamate, octocrylene, polysiloxane-15, tert-butylmethoxydibenzoylmethane, ethylhexyl triazine, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylaminohydroxybenzoyl benzoate, benzophenone-3, methylene bis-benzotriazolyl tetramethylbutylphenol, homosalate, and ethylhexyl salicylate. Two or more UV absorbers can be used alone or in combination.

[0102] There are no particular restrictions on the amount of oil to be mixed in cosmetics. For example, it can be 0.1% or more by mass, 0.3% or more by mass, 0.5% or more by mass, 1.0% or more by mass, 3.0% or more by mass, 5.0% or more by mass, exceeding 5.0% by mass, 6.0% or more by mass, 8.0% or more by mass, or 10% or more by mass. There are no particular restrictions on the upper limit of such a mixing amount. For example, it can be less than 20% by mass, less than 17% by mass, less than 15% by mass, less than 13% by mass, or less than 10% by mass. Oil can be appropriately mixed into cosmetics within these ranges.

[0103] (other)

[0104] In several embodiments, the aqueous wet powder solid cosmetic of this disclosure can contain resin powder and / or talc. However, the content of these materials can be less than 10% by mass, less than 8.0% by mass, less than 5.0% by mass, less than 3.0% by mass, less than 1.0% by mass, less than 0.5% by mass, or less than 0.1% by mass, respectively. Furthermore, these materials may not be mixed in the cosmetic. Here, "resin powder" refers to a powder formed from a resin material that is solid at room temperature (e.g., 25°C). Examples of such resin materials include, for example, polyamides (e.g., nylon), (meth)acrylates, polyolefins (e.g., polyethylene), polystyrene, polyesters (e.g., polyethylene terephthalate), polyurethanes, silicone elastomers, silicones, and fluoropolymers. The form of the powder is not particularly limited, and examples include, for example, particle shape, fiber shape, etc.

[0105] Uses of water-based wet powder solid cosmetics

[0106] There are no particular limitations on the applications of the water-based wet powder solid cosmetic disclosed herein. Examples of such applications include, for instance, foundation (e.g., powder foundation), eyeshadow, blush, talcum powder, face powder, baby powder, deodorant powder, and face powder. The water-based wet powder solid cosmetic disclosed herein has excellent usability and impact resistance, and provides a luminous skin finish, thus making it suitable for use as a foundation.

[0107] Manufacturing Method of Water-Based Powdered Solid Cosmetics

[0108] The powder solid cosmetic disclosed herein can be manufactured by a wet molding method using water as the dispersion medium for the slurry. It should be noted that the aforementioned components can also be used in the manufacturing method of the powder solid cosmetic.

[0109] Such a manufacturing method includes: (1) mixing a mixture comprising the above-mentioned plate-like mica, spherical inorganic particles and an oily component as a binder in a volatile dispersion medium to obtain a slurry; and (2) removing the volatile dispersion medium after filling the slurry into a container. Here, the volatile dispersion medium contains at least 50% by mass of water relative to the total amount of the dispersion medium. The water content in the dispersion medium, relative to the total amount of the dispersion medium, can be more than 50%, 60% by mass or more, 70% by mass or more, 80% by mass or more, or 90% by mass or more, and can also be less than 100% by mass or less than 100% by mass. The dispersion medium may contain components other than water. Examples of such components include, for example, lower alcohols such as ethanol.

[0110] In addition to the steps (1) and (2) above, the wet molding method may further implement, for example, at least one step selected from filling a container with slurry, removing the volatile dispersion medium from the container filled with slurry, and drying it.

[0111] Example

[0112] The following examples illustrate the invention in further detail, but the invention is not limited to them. Furthermore, unless otherwise specified, the mixing amount is expressed as a percentage by mass. Moreover, the various evaluation methods described in the examples are not limited to the cosmetics described in the examples, and can be applied to cosmetics containing the above-described ingredients in the same way.

[0113] Reference Examples, Examples 1-14, and Comparative Examples 1-5

[0114] The powder solid cosmetics obtained by the formulations shown in Tables 1 and 2 and the manufacturing methods described below were evaluated, and the results are shown in Tables 1 and 2. Here, the powder solid cosmetics are equivalent to pressed foundation.

[0115] Evaluation Methods

[0116] (Usability Test)

[0117] A comprehensive evaluation of usability was conducted by five professional reviewers. As an evaluation method, the usability of applying foundation powder to the face using a powder puff, specifically its softness and light spread, was assessed based on the following criteria. Here, ratings A through C are considered acceptable, and rating D is considered unacceptable. A: Five out of five respondents felt a soft, light spread.

[0118] B: 4 out of 5 people answered that they felt it was soft and light.

[0119] C: 3 out of 5 people answered that they felt it was soft and light.

[0120] D: 0-2 out of 5 respondents felt a soft, light spread.

[0121] (Impact resistance test)

[0122] Five test samples of the cosmetic material were prepared and dropped from a height of 30 cm onto a concrete surface. The number of drops until surface defects such as cracks, fissures, crazing, or peeling were observed was recorded. In Tables 1 and 2, cases with 5 or more drops were designated "A", 3 to 4 drops were designated "B", and 2 drops or less were designated "C". Here, A and B can be considered acceptable, and C can be considered unacceptable.

[0123] (Appearance test)

[0124] A comprehensive evaluation of the appearance was conducted by five professional reviewers. As an evaluation method, the appearance of the foundation when applied to the face using a foundation puff, specifically the luminous finish, was assessed based on the following criteria. Here, ratings A and B are considered acceptable, and rating C is considered unacceptable: A: Five out of five respondents described their skin as having a luminous texture.

[0125] B: 3 to 4 out of 5 respondents described their skin as having a glossy texture.

[0126] C: 0 to 2 out of 5 respondents reported having a glossy skin texture.

[0127] <Manufacturing Method of Powder Solid Cosmetics: Wet Molding Method>

[0128] (Example for reference)

[0129] While heating, the powder components, oil components, and additives specified in Table 1 were mixed using a Henschel mixer, and then further pulverized using a pulverizer to obtain a homogeneous mixture. An equal volume of 7% ethanol-water was added to this mixture, and the mixture was stirred to prepare a slurry solution. The resulting slurry solution was filled into a resin inner dish container that was approximately square (about 3 cm × about 4 cm) and about 5 mm deep. The water and ethanol were removed, and the container was dried. This yielded a conventional type of powder-solid cosmetic as a reference example.

[0130] (Comparative Example 1)

[0131] The formula was changed to that shown in Table 1, and the same procedure as in the reference example was followed to obtain the powdered solid cosmetic of Comparative Example 1.

[0132] (Comparative Example 2)

[0133] While heating, the powder components, oil components, and additives specified in Table 1 were mixed using a Henschel mixer, and then further pulverized using a pulverizer to obtain a homogeneous mixture. 80 parts by weight of 7% ethanol and water were added to 100 parts by weight of this mixture, and the mixture was stirred to prepare a slurry solution. The resulting slurry solution was filled into a resin inner dish container that was approximately square (approximately 3 cm × approximately 4 cm) and approximately 5 mm deep. The water and ethanol were removed, and the container was dried to obtain the powdered solid cosmetic of Comparative Example 2.

[0134] (Comparative Examples 3-5 and Examples 1-14)

[0135] The formulas were changed to those recorded in Table 1 or Table 2, and the same procedure was followed as in Comparative Example 2 to obtain the powdered solid cosmetics of Comparative Examples 3-5 and Examples 1-14, respectively.

[0136] [Table 1]

[0137] <result>

[0138] As can be clearly confirmed from Table 1, the cosmetics of Examples 1-3, which contain hydrophobic and hydrophilic plate-shaped mica and hydrophobic and hydrophilic spherical inorganic particles, have superior usability and impact resistance compared to the cosmetics of Comparative Examples 1-5, which lack any of the components.

[0139] It should be noted that the cosmetic in the reference example is equivalent to a conventional powder solid cosmetic containing resin powder and talc. While this cosmetic also exhibits excellent usability and impact resistance, its appearance is poor. On the other hand, the powder solid cosmetic of the present invention, in addition to excellent usability and impact resistance, also boasts excellent appearance, and therefore can be said to be superior overall compared to conventional powder solid cosmetics containing resin powder and talc.

[0140] As shown in Table 2, if at least one of the following is selected as an oil component: diisostearyl malate, tetra(benzyl / benzoic acid / ethylhexyl) pentaerythritol ester, and macadamia oleate phytosterol ester, then the usability, impact resistance, and appearance are further improved.

Claims

1. A water-soluble powder-solid cosmetic comprising plate-like mica and spherical inorganic particles, The plate-like mica comprises hydrophobic plate-like mica and hydrophilic plate-like mica, and, The spherical inorganic particles include hydrophobic spherical inorganic particles and hydrophilic spherical inorganic particles.

2. The cosmetic material according to claim 1, wherein the content of the tabular mica is 35% by mass or more relative to the total amount of the cosmetic material.

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

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

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

6. The cosmetic according to claim 1 or 2, wherein the spherical inorganic particles comprise at least one selected from silicon dioxide, calcium carbonate, and glass.

7. The cosmetic material according to claim 1 or 2, wherein it is a foundation.

8. A method for manufacturing the cosmetic as described in claim 1 or 2, comprising: A slurry is obtained by mixing a mixture comprising the plate-like mica, the spherical inorganic particles, and an oily component as a binder in a volatile dispersion medium; and After the slurry is filled into the container, the volatile dispersion medium is removed. The volatile dispersion medium contains more than 50% by mass of water relative to the total amount of the dispersion medium.

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