Cosmetic composition

Abstract

To provide a cosmetic composition that exhibits excellent post-coating uniformity, excellent temporal stability, and excellent ultraviolet protection capability.SOLUTION: A cosmetic composition comprising pigment particles surface-treated with an ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin, a plate-like powder, and an ultraviolet protection agent.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a cosmetic composition. [Background technology]

[0002] Known base makeup cosmetics include foundations, makeup primers, bronzing cosmetics, etc. Among these, bronzing cosmetics can create a tan or sun-tanned skin by applying them to the skin.

[0003] As such cosmetics, for example, Patent Document 1 discloses a cosmetic for sunburned skin that is characterized by containing an interfering substance that emits red interfering light. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 09-309819 Summary of the Invention [Problem to be solved by the invention]

[0005] There is still room for improvement in such base makeup cosmetics.

[0006] The present invention aims to improve the above-mentioned circumstances, and its object is to provide a cosmetic composition that has good uniformity when applied, good stability over time, and excellent ultraviolet protection ability. [Means for solving the problem]

[0007] The present invention that achieves the above object is as follows.

[0008] <Aspect 1> Pigment particles whose surface is treated with an ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin; Plate-like powder, and UV protection agent A cosmetic composition comprising: <Aspect 2> A cosmetic composition according to Aspect 1, wherein the ester compound is at least one selected from the group consisting of diglyceryl tetraisostearate, diglyceryl triisostearate, caprylic / capric triglyceride, glyceryl dilaurate, glyceryl triisostearate, decaglyceryl monoisostearate, and decaglyceryl diisostearate. <Aspect 3> Aspect 3. The cosmetic composition according to aspect 1 or 2, wherein the pigment particles comprise at least one selected from the group consisting of titanium oxide, yellow iron oxide, red iron oxide, black iron oxide, and zinc oxide. <Aspect 4> Aspect 4. The cosmetic composition according to any one of Aspects 1 to 3, wherein the plate-like powder comprises at least one selected from the group consisting of mica, metal oxide-coated mica, and sericite. <Aspect 5> Aspect 5. The cosmetic composition according to any one of Aspects 1 to 4, wherein the UV protection agent comprises an UV absorber and / or an UV scattering agent. <Aspect 6> Aspect 6. The cosmetic composition according to any one of Aspects 1 to 5, wherein the pigment particles surface-treated with the ester compound are present in an amount of 20 to 1000 parts by mass per 100 parts by mass of the plate-like powder. <Aspect 7> An oily solid cosmetic comprising the cosmetic composition according to any one of aspects 1 to 6. <Aspect 8> An oil-in-water emulsion cosmetic comprising the cosmetic composition according to any one of aspects 1 to 6. <Aspect 9> A water-in-oil emulsion cosmetic comprising the cosmetic composition according to any one of aspects 1 to 6. <Aspect 10> A base makeup cosmetic comprising the cosmetic composition according to any one of aspects 1 to 6. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a cosmetic composition that has good uniformity after application, good stability over time, and excellent ultraviolet protection ability.

[0010] Furthermore, according to the present invention, it is also possible to provide an oily solid cosmetic, an oil-in-water emulsion cosmetic, and a water-in-oil emulsion cosmetic, each containing the cosmetic composition of the present invention.

[0011] Furthermore, according to the present invention, it is also possible to provide a base makeup cosmetic containing the cosmetic composition of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the preferred embodiments. However, the present invention is not limited to the following embodiments, and various modifications can be made within the scope of the present invention.

[0013] <<Cosmetic Composition>> The cosmetic composition of the present invention comprises pigment particles that have been surface-treated with an ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin; Plate-like powder, and UV protection agent A cosmetic composition comprising or consisting of is.

[0014] In the following description, the "cosmetic composition of the present invention" will also be referred to simply as the "composition of the present invention," and the "ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin" will also be referred to simply as the "ester compound according to the present invention."

[0015] Through extensive research by the present inventors, it has been found that a cosmetic composition prepared by using a combination of pigment particles surface-treated with the ester compound according to the present invention, a plate-like powder, and an ultraviolet protection agent has good uniformity after application, good stability over time, and excellent ultraviolet protection ability.

[0016] Without being limited by theory, it is believed that the pigment particles surface-treated with the ester compound of the present invention promote the orientation of the plate-like powder, and as a result, the composition of the present invention provides good uniformity after application and stability over time. Furthermore, it is believed that the ability to apply the composition of the present invention evenly to the skin allows the UV protection agent contained therein to more efficiently exert its UV protection effect.

[0017] Each component that may be contained in the composition of the present invention will be described in detail below.

[0018] <Surface-treated pigment particles> The composition of the present invention comprises one or more surface-treated pigment particles, wherein the surface-treated pigment particles have been surface-treated with an ester compound according to the present invention.

[0019] In the composition of the present invention, the content of the surface-treated pigment particles is not particularly limited, and may be adjusted, for example, as follows.

[0020] For example, the content of the surface-treated pigment particles relative to the total amount of the composition of the present invention may be, for example, 1.0% by mass or more, 2.0% by mass or more, 3.0% by mass or more, 4.0% by mass or more, 5.0% by mass or more, 6.0% by mass or more, 7.0% by mass or more, 8.0% by mass or more, 9.0% by mass or more, 10% by mass or more, 11% by mass or more, 12% by mass or more, 13% by mass or more, or 15% by mass or more, or 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, 25% by mass or less, 20% by mass or less, 18% by mass or less, 15% by mass or less, 12% by mass or less, or 10% by mass or less. Furthermore, from the viewpoint of improving covering power and dispersing power, the content of the surface-treated pigment particles is preferably 5.0% by mass or more.

[0021] Furthermore, for example, relative to 100 parts by mass of the plate-like powder described below, the amount of the surface-treated pigment particles may be 20 parts by mass or more, 30 parts by mass or more, 40 parts by mass or more, 50 parts by mass or more, 60 parts by mass or more, 70 parts by mass or more, 80 parts by mass or more, 90 parts by mass or more, 100 parts by mass or more, 110 parts by mass or more, 120 parts by mass or more, 130 parts by mass or more, 140 parts by mass or more, or 150 parts by mass or more, and may be 1000 parts by mass or less, 900 parts by mass or less, 800 parts by mass or less, 700 parts by mass or less, 600 parts by mass or less, 500 parts by mass or less, 400 parts by mass or less, 300 parts by mass or less, 200 parts by mass or less, 180 parts by mass or less, 150 parts by mass or less, 120 parts by mass or less, 100 parts by mass or less, or 50 parts by mass or less.

[0022] The ester compound according to the present invention is not particularly limited, and is preferably one that does not color or is unlikely to color the pigment particles that are the subject of surface treatment.

[0023] Specifically, the fatty acid having 8 to 20 carbon atoms in the ester compound according to the present invention may be, for example, a fatty acid having 8 or more, 10 or more, 12 or more, 14 or more, 16 or more, or 18 or more carbon atoms, or a fatty acid having 20 or less, 19 or less, or 18 or less carbon atoms. Of these, fatty acids having 8 to 18 carbon atoms are preferred, and fatty acids having 12 to 18 carbon atoms are more preferred. Furthermore, such fatty acids may be branched or linear.

[0024] Furthermore, the glycerin in the ester compound according to the present invention may be either unpolymerized (i.e., a monomer) monoglycerin or polymerized (i.e., a polymer) polyglycerin. When polyglycerin is used, its degree of polymerization is not particularly limited, but is preferably from 2 to 10. As the glycerin, monoglycerin, which is a monomer, diglycerin having a degree of polymerization of 2, or decaglycerin having a degree of polymerization of 10 is preferred, and diglycerin having a degree of polymerization of 2 is more preferred.

[0025] The ester compound according to the present invention may contain, for example, at least one selected from the group consisting of diglyceryl tetraisostearate, diglyceryl triisostearate, diglyceryl diisostearate, diglyceryl monoisostearate, caprylic / capric triglyceride, glyceryl triethylhexanoate, glyceryl dilaurate, glyceryl triisostearate, decaglyceryl monoisostearate, and decaglyceryl diisostearate. Among these, for example, from the viewpoint of improving the lipophilicity of the surface-treated pigment particles and from the viewpoint of being a naturally-derived material, the ester compound according to the present invention is preferably, for example, diglyceryl tetraisostearate, diglyceryl triisostearate, glyceryl dilaurate, glyceryl triisostearate, decaglyceryl monoisostearate, or decaglyceryl diisostearate, and of these, diglyceryl tetraisostearate is particularly preferred.

[0026] The method for surface treatment of pigment particles using the ester compound of the present invention is not particularly limited, and for example, the "Method for producing powder materials for cosmetics" disclosed in International Publication No. 2022 / 030462 may be referred to as appropriate.

[0027] In the present invention, any pigment particles can be used for the surface treatment, regardless of their shape (spherical, rod-like, needle-like, irregular, scaly, spindle-like, etc.), particle size (aerosol-like, fine particles, pigment-grade, etc.), or particle structure (porous, non-porous, etc.). Examples of pigment particles that can be used include, but are not limited to, inorganic pigment powders (including natural mineral pigments or synthetic inorganic pigments, etc.), organic dyes, and organic pigment powders.

[0028] More specifically, examples of inorganic pigments include, but are not limited to, titanium oxide, yellow iron oxide, red iron oxide, black iron oxide, talc, zinc oxide, carbon black, red iron oxide, cerium oxide, manganese violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt titanate, ultramarine, Prussian blue, magnesium oxide, zirconium oxide, vermiculite, silica, calcium carbonate, magnesium carbonate, magnesium silicate, aluminum silicate, barium silicate, calcium silicate, calcium sulfate, calcium phosphate, boron nitride, and bismuth oxychloride. Among the above-mentioned inorganic pigments, those formulated in a plate-like form, particularly those within the aspect ratio range of the plate-like powder of the present invention, are classified as the plate-like powder of the present invention.

[0029] Examples of organic dyes include, but are not limited to, Red No. 3, Red No. 10, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 505, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Yellow No. 205, Yellow No. 401, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 205, Orange No. 206, Orange No. 207, Blue No. 1, Blue No. 2, Blue No. 201, Blue 404, Green No. 3, Green No. 201, Green No. 204, and Green No. 205.

[0030] Examples of organic pigment powders include, but are not limited to, tar pigments, nylon powder, cellulose powder, polyethylene powder, polymethyl methacrylate powder, polystyrene powder, acrylic powder, and silicone powder.

[0031] These pigment particles can be used alone or in combination.

[0032] From the viewpoint of using the composition of the present invention in base makeup cosmetics such as foundations, makeup bases, and bronzing cosmetics, the pigment particles, among the examples given above, may contain at least one selected from the group consisting of titanium oxide, yellow iron oxide, red iron oxide, black iron oxide, and zinc oxide. In particular, from the viewpoint of using the composition of the present invention in bronzing cosmetics, for example, it is preferable that the pigment particles contain at least one selected from the group consisting of yellow iron oxide, red iron oxide, and black iron oxide, and it is more preferable that the pigment particles contain black iron oxide.

[0033] <Plate-shaped powder> The composition of the present invention contains one or more types of plate-like powder. The inclusion of the plate-like powder in the composition of the present invention can, for example, improve spreadability and / or adhesion upon application and impart a moderate gloss to the finished product. Therefore, the plate-like powder can serve as a usable powder. Furthermore, the surface-treated pigment particles described above improve the orientation of the plate-like powder, improving the uniformity of application of the composition of the present invention and further improving the UV protection effect of the UV protection agent.

[0034] In the present invention, the plate-like powder refers to a powder having a flat shape, and the planar shape may be rectangular, circular, irregular, or polygonal.

[0035] In the present invention, the plate-like powder may have an aspect ratio (average particle diameter / average thickness) of more than 1.0, 2.0 or more, 5.0 or more, 10 or more, 15 or more, 20 or more, 25 or more, 30 or more, 35 or more, 40 or more, 45 or more, or 50 or more, or 80 or less, 75 or less, 70 or less, or 65 or less. In particular, in the present invention, plate-like powders having an aspect ratio of 15 or more, 20 or more, 25 or more, 30 or more, 35 or more, or 40 or more are preferred. The average particle diameter of the plate-like powder may be a value measured by a laser scattering / diffraction method using a Microtrac HRA (manufactured by Microtrac). The average thickness of the plate-like powder may be a value determined by measuring the thickness of an arbitrary number of particles by tilted observation with an electron microscope and averaging the measured values.

[0036] In the present invention, the average particle size of the plate-like powder may be, for example, 25 μm or less, preferably 20 μm or less, and may be 2.0 μm or more, in spherical equivalent.

[0037] In the composition of the present invention, the content of the plate-like powder is not particularly limited, and may be, for example, 1.0% by mass or more, 3.0% by mass or more, 5.0% by mass or more, 10% by mass or more, 11% by mass or more, 12% by mass or more, 13% by mass or more, 14% by mass or more, 15% by mass or more, 16% by mass or more, 17% by mass or more, 18% by mass or more, 19% by mass or more, 20% by mass or more, 21% by mass or more, 22% by mass or more, 23% by mass or more, 24% by mass or more, 25% by mass or more, 26% by mass or more, 27% by mass or more, 28% by mass or more, 29% by mass or more, or 30% by mass or more, or 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, 25% by mass or less, 20% by mass or less, or 15% by mass or less, relative to the total amount of the composition.

[0038] In the present invention, specific examples of the plate-like powder are not particularly limited. For example, the plate-like powder may include at least one selected from the group consisting of mica, metal oxide-coated mica, and sericite. Here, metal oxide-coated mica refers to mica coated with titanium oxide, iron oxide, or the like. For example, titanium oxide-coated mica can have a pearly luster and can also be used as a pearling agent.

[0039] In the present invention, the plate-like powder may be surface-treated or untreated. Untreated plate-like powder is preferred because it is less affected by the type of oil to be blended. Examples of surface treatments include hydrophobic treatments such as fluorine compound treatment, silicone treatment, silicone resin treatment, pendant treatment, silane coupling agent treatment, titanium coupling agent treatment, oil treatment, N-acylated lysine treatment, polyacrylic acid treatment, metal soap treatment, dextrin fatty acid ester treatment, amino acid treatment, inorganic compound treatment, plasma treatment, mechanochemical treatment, silane compound treatment, and silazane compound treatment, but are not limited to these.

[0040] <UV protection agent> The composition of the present invention contains an ultraviolet protection agent. By including an ultraviolet protection agent in the composition of the present invention, an ultraviolet protection effect can be achieved.

[0041] In the composition of the present invention, the content of the UV protection agent is not particularly limited and may be, for example, 1.0% by mass or more, relative to the total amount of the composition. From the viewpoint of further improving the UV protection effect, it may be 3.0% by mass or more, and preferably 5.0% by mass or more, 7.0% by mass or more, 10% by mass or more, 11% by mass or more, 12% by mass or more, 13% by mass or more, 14% by mass or more, 15% by mass or more, 16% by mass or more, 17% by mass or more, 18% by mass or more, 19% by mass or more, or 20% by mass or more, and may be 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, 25% by mass or less, 20% by mass or less, or 18% by mass or less.

[0042] In the composition of the present invention, specific examples of the ultraviolet protection agent are not particularly limited. For example, the composition of the present invention may contain an ultraviolet absorbing agent and / or an ultraviolet scattering agent as the ultraviolet protection agent.

[0043] (ultraviolet absorber) In the present invention, the ultraviolet absorber is not particularly limited, and may be either fat-soluble or water-soluble. The composition of the present invention may contain one or more ultraviolet absorbers.

[0044] Specific examples of ultraviolet absorbers include, but are not limited to, benzoic acid derivatives, salicylic acid derivatives, cinnamic acid derivatives, dibenzoylmethane derivatives, β,β-diphenylacrylate derivatives, benzophenone derivatives, benzylidene camphor derivatives, phenylbenzimidazole derivatives, triazine derivatives, phenylbenzotriazole derivatives, anthranil derivatives, imidazoline derivatives, benzalmalonate derivatives, 4,4-diarylbutadiene derivatives, etc. Specific examples and trade names of these will be described below.

[0045] Examples of benzoic acid derivatives include, but are not limited to, ethyl para-aminobenzoate (PABA), ethyl-dihydroxypropyl PABA, ethylhexyl-dimethyl PABA (e.g., "Escarol 507"; manufactured by ISP), glyceryl PABA, PEG-25-PABA (e.g., "Uvinal P25"; manufactured by BASF), and diethylaminohydroxybenzoylhexyl benzoate (e.g., "Uvinal A Plus"), etc.

[0046] Examples of salicylic acid derivatives include, but are not limited to, homosalate (Eusolex HMS; manufactured by Rona / EM Industries), ethylhexyl salicylate (also known as ethylhexyl salicylate, e.g., NeoHeliopan OS; manufactured by Herman & Reimer), dipropylene glycol salicylate (e.g., Dipsal; manufactured by Skell), and TEA salicylate (e.g., NeoHeliopan TS; manufactured by Herman & Reimer).

[0047] Examples of cinnamic acid derivatives include, but are not limited to, ethylhexyl methoxycinnamate (e.g., Parsol MCX; manufactured by Hoffmann-La Roche), isopropyl methoxycinnamate, isoamyl methoxycinnamate (e.g., Neo Heliopan E1000; manufactured by Herman & Reimer), cinnoxate, DEA methoxycinnamate, diisopropyl methylcinnamate, glyceryl ethylhexanoate dimethoxycinnamate, and di-(2-ethylhexyl)-4'-methoxybenzalmalonate.

[0048] Dibenzoylmethane derivatives include, but are not limited to, t-butyl methoxydibenzoylmethane (also known as "4-tert-butyl-4'-methoxydibenzoylmethane" (e.g., "Parsol 1789")).

[0049] Examples of β,β-diphenylacrylate derivatives include, but are not limited to, octocrylene (for example, "Uvinal N539" manufactured by BASF).

[0050] Examples of benzophenone derivatives include, but are not limited to, benzophenone-1 (e.g., "Uvinal 400"; manufactured by BASF), benzophenone-2 (e.g., "Uvinal D50"; manufactured by BASF), benzophenone-3 or oxybenzone (e.g., "Uvinal M40"; manufactured by BASF), benzophenone-4 (e.g., "Uvinal MS40"; manufactured by BASF), benzophenone-5, benzophenone-6 (e.g., "Helisorb 11"; manufactured by Norquay), benzophenone-8 (e.g., "Spectra-Sorb UV-24"; manufactured by American Cyanamid), benzophenone-9 (e.g., "Uvinal DS-49"; manufactured by BASF), and benzophenone-12.

[0051] Examples of benzylidene camphor derivatives include, but are not limited to, 3-benzylidene camphor (e.g., "Mexoryl SD"; manufactured by Cimex), 4-methylbenzylidene camphor, benzylidene camphorsulfonic acid (e.g., "Mexoryl SL"; manufactured by Cimex), benzalkonium camphor methosulfate (e.g., "Mexoryl SO"; manufactured by Cimex), terephthalidene discamphorsulfonic acid (e.g., "Mexoryl SX"; manufactured by Cimex), and polyacrylamidomethyl benzylidene camphor (e.g., "Mexoryl SW"; manufactured by Cimex).

[0052] Examples of phenylbenzimidazole derivatives include, but are not limited to, phenylbenzimidazole sulfonic acid (e.g., "Eusolex 232"; manufactured by Merck) and disodium phenyldibenzimidazole tetrasulfonate (e.g., "Neo-Heliopan AP"; manufactured by Herman & Reimer).

[0053] Examples of triazine derivatives include, but are not limited to, anisotriazine (e.g., "Tinosorb S"; manufactured by Ciba Specialty Chemicals), ethylhexyl triazone (e.g., "Uvinal T150"; manufactured by BASF), diethylhexylbutamido triazone (e.g., "Uvasorb HEB"; manufactured by Sigma 3V), and 2,4,6-tris(diisobutyl-4'-aminobenzalmalonate)-s-triazine.

[0054] Examples of phenylbenzotriazole derivatives include, but are not limited to, drometrizole trisiloxane (e.g., Silatrizole; manufactured by Rhodia-Chemie) and methylenebis(benzotriazolyltetramethylbutylphenol) (e.g., Tinosorb M; manufactured by Ciba Specialty Chemicals).

[0055] Examples of anthranil derivatives include, but are not limited to, menthyl anthranilate (for example, "Neo Heliopan MA"; manufactured by Herman & Reimer).

[0056] Imidazoline derivatives include, but are not limited to, ethylhexyldimethoxybenzylidene dioxoimidazoline propionate and the like.

[0057] Examples of benzalmalonate derivatives include, but are not limited to, polyorganosiloxanes having benzalmalonate functional groups (for example, polysilicone-15; "Parsol SLX"; manufactured by DSM Nutrition Japan).

[0058] Examples of 4,4-diarylbutadiene derivatives include, but are not limited to, 1,1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene and the like.

[0059] (UV scattering agent) The composition of the present invention may contain one or more ultraviolet scattering agents as ultraviolet protection agents, and the ultraviolet scattering agents may be used in combination with the above-mentioned ultraviolet absorbers as ultraviolet protection agents.

[0060] In the present invention, the ultraviolet scattering agent is not particularly limited, and may be, for example, particles of at least one ultraviolet scattering agent selected from the group consisting of titanium oxide, zinc oxide, iron oxide, and cerium oxide.

[0061] The ultraviolet scattering agent may be hydrophobized or untreated. Here, the hydrophobization treatment may be carried out using a known surface treatment agent for hydrophobization, and examples thereof include fluorine compound treatment, silicone treatment, silicone resin treatment, pendant treatment, silane coupling agent treatment, titanium coupling agent treatment, oil treatment, N-acylated lysine treatment, polyacrylic acid treatment, metal soap treatment, dextrin fatty acid ester treatment, amino acid treatment, inorganic compound treatment, plasma treatment, mechanochemical treatment, silane compound treatment, and silazane compound treatment. Among these treatments, from the viewpoint of dispersion stability and the like, treatment with silicone or silicone resin, treatment with silane compound or silazane compound, and metal soap treatment such as stearic acid / aluminum hydroxide are preferred.

[0062] The average primary particle diameter of the ultraviolet scattering agent particles is not particularly limited and may be, for example, 5 nm or more, 10 nm or more, or 15 nm or more, or 200 nm or less, 100 nm or less, or 50 nm or less. The "average primary particle diameter" may be determined as the diameter of a circle equivalent to the projected area of ​​the primary particles in a TEM image.

[0063] The shape of the ultraviolet scattering agent particles is not particularly limited, and examples thereof include spherical, plate-like, rod-like, spindle-like, needle-like, and irregular shapes.

[0064] <Other ingredients> The composition of the present invention may further contain other components, as needed, in addition to the components described above. The other components will be described below as examples, but are not intended to limit the present invention.

[0065] (Oily ingredients) The compositions of the present invention may further comprise one or more oily components.

[0066] When an oily component is contained in the composition of the present invention, its content is not particularly limited and may be, for example, 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, 75% by mass or more, 80% by mass or more, or 85% by mass or more, relative to the total amount of the composition, or 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, or 55% by mass or less. The content of the oily component may be appropriately set depending on the type of cosmetic product desired (for example, an oil-based cosmetic product, or an oil-in-water or water-in-oil emulsion cosmetic product, etc.).

[0067] The oil component is not particularly limited, and may be, for example, a liquid oil, or a solid or semi-solid oil at 25° C. Among oils, those having an ultraviolet protection effect are classified as the ultraviolet absorber of the present invention described above.

[0068] Liquid oils include, but are not limited to, hydrocarbon oils, ester oils, silicone oils, and liquid fats and oils.

[0069] Examples of hydrocarbon oils include, but are not limited to, liquid paraffin, hydrogenated polydecene, squalane, pristane, paraffin, squalene, α-olefin oligomer, isododecane, isohexadecane, and light isoparaffin.

[0070] 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, pentaerythritol tetra-2-ethylhexanoate, glycol tri-2-ethylhexanoate, Glycerin, 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-glutamic acid-2-octyldodecyl ester, di- Examples of ester oils include, but are not limited to, 2-heptylundecyl, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, isodecyl pivalate, 2-ethylhexyl succinate, ethyl acetate, butyl acetate, triethyl citrate, triethylhexanoin, and caprylic / capric triglyceride. Among ester oils, those having an ultraviolet protection effect are classified as the ultraviolet absorber of the present invention described above.

[0071] Examples of silicone oils include, but are not limited to, chain polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, and diphenylsiloxyphenyltrimethicone, and cyclic polysiloxanes such as decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, and hexamethylcyclotrisiloxane.

[0072] Examples of liquid oils and fats include, but are not limited to, 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, triglycerin, glycerin trioctanoate, and glycerin triisopalmitate.

[0073] The solid or semi-solid oil component is not particularly limited as long as it can be incorporated into cosmetics, and examples thereof include solid fats and oils, waxes, oil gelling agents, and higher alcohols.

[0074] Examples of solid fats and oils include, but are not limited to, cacao butter, coconut oil, horse oil, hardened coconut oil, palm oil, beef tallow, mutton tallow, hardened beef tallow, palm kernel oil, lard, beef bone fat, Japan wax kernel oil, hardened oil, beef foot fat, Japan wax, and hardened castor oil.

[0075] Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, privet wax, whale wax, montan wax, bran wax, lanolin, kapok wax, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, 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, and the like, but are not limited to these.

[0076] Examples of waxes include petroleum waxes such as paraffin wax and microcrystalline wax, natural waxes such as carnauba wax, candelilla wax, ozokerite and ceresin, polyethylene wax, polypropylene wax, and the like, which have a melting point of 50°C or higher at normal pressure, but are not limited to these.

[0077] Examples of oil gelling agents include, but are not limited to, condensates of benzaldehydes such as dibenzylidene sorbitol, tribenzylidene sorbitol, dibenzylidene xylitol, and paramethoxybenzylidene sorbitol with pentavalent or higher alcohols; metal soaps such as calcium stearate, calcium palmitate, lithium 2-ethylhexanoate, and aluminum 12-hydroxystearate; derivatives of amides, esters, and amine salts of N-acylamino acids such as lauroyl glutamic acid dibutylamide, lauroyl glutamic acid stearylamide, dicaproyl lysine laurylamine salt, dicaproyl lysine lauryl ester, and dicaproyl lysine lauroyl phenylalanine laurylamide; dextrin fatty acid esters; 12-hydroxystearic acid; and oligomers obtained by condensing glycerin with a mixed fatty acid consisting of behenic acid and eicosanedioic acid.

[0078] Examples of higher alcohols include, but are not limited to, straight-chain alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, and cetostearyl alcohol, and branched-chain alcohols such as monostearyl glycerin ether (batyl alcohol), 2-decyltetradecinol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, and octyldodecanol.

[0079] (aqueous component) The compositions of the present invention may further comprise one or more aqueous components.

[0080] When the composition of the present invention contains an aqueous component, its content is not particularly limited and may be, for example, 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, or 30% by mass or more, relative to the total amount of the composition, or 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. The content of the aqueous component may be appropriately set depending on the type of cosmetic product desired (for example, an oil-in-water or water-in-oil emulsion cosmetic product, etc.).

[0081] Examples of aqueous components include, but are not limited to, water, thickeners, and humectants.

[0082] The water is not particularly limited and may be, for example, water used in cosmetics and quasi-drugs, such as ion-exchanged water, distilled water, ultrapure water, and tap water.

[0083] The thickener is not particularly limited, and examples thereof include dextrin fatty acid esters, organically modified clay minerals, plant-derived polymers, microbial-derived polymers, natural water-soluble polymers, semi-synthetic water-soluble polymers, and synthetic water-soluble polymers.

[0084] The moisturizing agent is not particularly limited and may be any of those commonly used in cosmetics, etc. Examples of moisturizing agents include, but are not limited to, sucrose, sorbitol, glycerin, 1,3-butylene glycol, propylene glycol, and dipropylene glycol.

[0085] (surfactant) The compositions of the present invention may further comprise one or more surfactants.

[0086] When a surfactant is contained in the composition of the present invention, its content is not particularly limited and may be, for example, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 2.0% by mass or more, 3.0% by mass or more, or 4.0% by mass or more, relative to the entire composition, and may be 15% by mass or less, 10% by mass or more, or 5.0% by mass or more.

[0087] The surfactant is not particularly limited, and for example, cationic surfactants, anionic surfactants, nonionic surfactants, amphoteric surfactants, etc. may be used as appropriate.

[0088] (Other optional ingredients) In addition to the above, other optional ingredients commonly used in cosmetics, such as preservatives, sequestering agents, powder components, pH adjusters, skin nutrients, vitamins, antioxidants, antioxidant aids, fragrances, etc., may be appropriately blended as needed within the scope that does not impair the effects of the present invention.

[0089] Cosmetics The above-described composition of the present invention may be used as a raw material for various cosmetics, or the composition of the present invention may be used as is as various cosmetics. Thus, the present invention can provide an oil-based cosmetic (particularly an oil-based solid cosmetic) comprising the composition of the present invention, a water-in-oil emulsion cosmetic comprising the composition of the present invention, and an oil-in-water emulsion cosmetic comprising the composition of the present invention.

[0090] The composition of the present invention has good uniformity after application, good stability over time, and excellent UV protection ability, and therefore, these cosmetics containing the composition of the present invention can similarly have good uniformity after application, good stability over time, and excellent UV protection ability.

[0091] In addition to the composition of the present invention, these cosmetics may contain various other ingredients as appropriate, provided that the effects of the present invention are not affected. The necessity and amount of other ingredients may be adjusted appropriately depending on the type of cosmetic.

[0092] <Oil-based cosmetics> In the present invention, the term "oil-based cosmetic" refers to a cosmetic that is a single-phase oil phase. Furthermore, oil-based cosmetic compositions generally do not substantially contain water, which is present separately from the oil phase.

[0093] In the present invention, among oil-based cosmetics, oil-based solid cosmetics are particularly preferred. Note that an oil-based solid cosmetic refers to a cosmetic in which the oil phase is the continuous phase and whose hardness measured at 25°C by a rheometer is 10 or more (measurement conditions: needle diameter 1.5 mmφ, penetration speed 2 cm / min, penetration length 10 mm, load weight 2 kg, rheometer manufactured by Fudo Kogyo Co., Ltd.), preferably 30 or more.

[0094] In the oily cosmetic of the present invention, the content of the composition of the present invention is not particularly limited and may be, for example, 80% by mass or more, 85% by mass or more, 90% by mass or more, 95% by mass or more, or 99% by mass or more, and may be 100% by mass or less, 99% by mass or less, 98% by mass or less, 97% by mass or less, 96% by mass or less, or 95% by mass or less.

[0095] <Water-in-oil emulsion cosmetics> The water-in-oil emulsion cosmetic of the present invention may contain the composition of the present invention in its continuous phase (external phase).

[0096] In the water-in-oil emulsion cosmetic of the present invention, the content of the composition of the present invention is not particularly limited, and may be, for example, 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, 75% by mass or more, 80% by mass or more, 85% by mass or more, or 90% by mass or more, or may be 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, or 55% by mass or less.

[0097] <Oil-in-water emulsion cosmetics> The oil-in-water emulsion cosmetic of the present invention may contain the composition of the present invention in its dispersed phase (internal phase).

[0098] In the oil-in-water emulsion cosmetic of the present invention, the content of the composition of the present invention is not particularly limited, and may be, for example, 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, or 70% by mass or more, or may be 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, 50% by mass or less, or 45% by mass or less.

[0099] <Dosage form> Examples of dosage forms of cosmetics containing the composition of the present invention include, but are not limited to, solid, semi-solid, solid paste, stick, emulsion, liquid, gel, sherbet, cream, ointment, and paste.

[0100] <Application> The cosmetic containing the composition of the present invention can be used as a base makeup cosmetic.

[0101] Therefore, the present invention can provide a base makeup cosmetic containing the composition of the present invention.

[0102] Here, the base makeup cosmetic refers to a cosmetic that has the effect of correcting or correcting skin color. More specifically, examples of base makeup cosmetic include, but are not limited to, foundation, makeup base, concealer, and bronzing cosmetic. [Example]

[0103] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these. Unless otherwise specified, the blending amounts are expressed in mass %.

[0104] Examples 1 to 4 and Comparative Examples 1 to 3 Oily solid cosmetic compositions of Examples 1 to 4 and Comparative Examples 1 to 3 were prepared based on the formulations in Table 1. Each of the resulting compositions was evaluated for UV protection effect, uniformity after application (superiority or inferiority of the apparent smoothness after application and the presence or absence of color unevenness after application), and stability over time according to the following criteria, and the results are shown in Table 1.

[0105] <UV protection effect> A sample of the composition obtained in each example was applied to an S-plate (5 cm x 5 cm V-groove PMMA plate, SPFMASTER-PA01) at 2 mg / cm 2 The composition was applied in an amount of 100 ml, applied with a finger for 60 seconds, and then dried for 15 minutes. The absorbance of each composition against ultraviolet light (400-280 nm) was then measured using a spectrophotometer (U-3500, manufactured by Hitachi). The transmittance of the composition sample was defined as T, and the transmittance measured for the uncoated plate as To. The absorbance (Abs) was calculated using the following formula: Abs=-log(T / To)

[0106] The composition samples were then evaluated according to the following criteria, with the sample of Example 1 used as a control (standard): "A": The absorbance (integrated Abs value) was equal to or greater than the absorbance (integrated Abs value) of Example 1; "B": The absorbance (Abs integrated value) was 90% or more of the absorbance of Example 1, but less than the absorbance of Example 1; "C": The absorbance (integrated Abs value) was less than 90% of the absorbance in Example 1.

[0107] <Uniformity after application> 1. The smoothness of the appearance after application An appropriate amount of each composition sample was applied to the skin, and visual inspection was performed and evaluated according to the following evaluation criteria: "A": No streaks or unevenness were observed, and the surface was smooth; "B": Multiple streaks were observed and the smoothness was inferior to "A"; "C": Streaks were observed and the smoothness was poor.

[0108] 2. Whether or not there is uneven color after application An appropriate amount of each composition sample was applied to the skin, and visual inspection was performed and evaluated according to the following evaluation criteria: "A": No color unevenness was observed; "B": Multiple color irregularities were observed; "C": Color unevenness was observed.

[0109] The above-mentioned "visual smoothness after application" is judged mainly by streaks caused by the powder used, and the "presence or absence of color unevenness after application" is judged mainly by color unevenness caused by surface-treated pigment particles.

[0110] <Stability over time> Each composition sample was stirred at a speed of 70 rpm using a stirring blade (propeller-type, four-blade) at a temperature above which it became liquid, and the dispersion state of the surface-treated pigment particles in each sample was visually confirmed and evaluated according to the following criteria: "A": No color unevenness due to surface-treated pigment particles was observed even after stirring for 4 hours; "B": After stirring for 2 hours, uneven color due to surface-treated pigment particles occurred; "C": Color unevenness occurred due to surface-treated pigment particles after stirring for less than 2 hours.

[0111] [Table 1]

[0112] As is clear from the results in Table 1, all of the compositions of Examples 1 to 4 were found to have good uniformity after application, good stability over time, and excellent UV protection ability.

[0113] In contrast, it was found that the UV protection ability was low in all of the compositions of Comparative Examples 1 to 3. Furthermore, it was found that the compositions of Comparative Examples 2 and 3 did not contain any plate-like powder and therefore had poor uniformity after application.

[0114] Example 5 and Comparative Examples 4 to 7 Oily solid cosmetic compositions of Example 5 and Comparative Examples 4 to 7 were prepared based on the formulations in Table 2. Each of the resulting compositions was evaluated for UV protection effect, uniformity after application (the apparent smoothness after application and the presence or absence of color unevenness after application), and stability over time in the same manner as above, and the results are shown in Table 2.

[0115] In the evaluation of the UV protection effect, the evaluation criteria of Example 5 were used instead of Example 1.

[0116] [Table 2]

[0117] As is clear from the results in Table 2, the composition of Example 5 had good uniformity after application, good stability over time, and excellent UV protection ability.

[0118] In contrast, it was found that the compositions of Comparative Examples 4 to 7 all had poor uniformity after application (particularly uniformity in terms of color unevenness after application) and poor stability over time.

[0119] Formulation examples of the composition of the present invention are given below, but the present invention is not limited to these formulation examples. Prescription Example 1 Based on the formulation in Table 3, an oil-in-water emulsion cosmetic composition of Formulation Example 1 was prepared.

[0120] [Table 3]

[0121] Prescription Example 2 Based on the formulation in Table 4, a water-in-oil emulsion cosmetic composition of Formulation Example 2 was prepared.

[0122] [Table 4]

Claims

1. pigment particles surface-treated with an ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin; Plate-like powder, and UV protection agent A cosmetic composition comprising:

2. 2. The cosmetic composition according to claim 1, wherein the ester compound is at least one selected from the group consisting of diglyceryl tetraisostearate, diglyceryl triisostearate, caprylic / capric triglyceride, glyceryl dilaurate, glyceryl triisostearate, decaglyceryl monoisostearate, and decaglyceryl diisostearate.

3. The cosmetic composition according to claim 1 , wherein the pigment particles comprise at least one selected from the group consisting of titanium oxide, yellow iron oxide, red iron oxide, black iron oxide, and zinc oxide.

4. The cosmetic composition according to claim 1 , wherein the plate-like powder comprises at least one selected from the group consisting of mica, metal oxide-coated mica, and sericite.

5. The cosmetic composition according to claim 1 , wherein the UV protection agent comprises an UV absorber and / or an UV scattering agent.

6. 2. The cosmetic composition according to claim 1, wherein the pigment particles surface-treated with the ester compound are present in an amount of 20 to 1,000 parts by mass relative to 100 parts by mass of the plate-like powder.

7. An oily solid cosmetic comprising the cosmetic composition according to any one of claims 1 to 6.

8. An oil-in-water emulsion cosmetic comprising the cosmetic composition according to any one of claims 1 to 6.

9. A water-in-oil emulsion cosmetic comprising the cosmetic composition according to any one of claims 1 to 6.

10. A base makeup cosmetic comprising the cosmetic composition according to any one of claims 1 to 6.

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