Oil-based solid cosmetic

Abstract

The present invention provides an oil-based solid cosmetic composition containing a relatively high amount of titanium dioxide / zinc oxide that suppresses sweating while also suppressing the aggregation of metal oxides when filling molds or other containers with the cosmetic composition. [Solution] The following components (A) to (D); (A) Titanium dioxide and / or zinc oxide (B) Triglycerides of fatty acids with 20-28 carbon atoms (C) Waxes with a melting point of 60°C or higher (excluding component (B)) (D) Oil having at least one ester group in a paste-like state at 25°C An oil-based solid cosmetic composition comprising, wherein the content of component (A) exceeds 10% by mass, and the content of component (D) exceeds 10% by mass.

Description

Technical Field

[0006] , , , , , , ,

[0001] The present invention relates to an oily solid cosmetic.

Background Art

[0002] An oily solid cosmetic is a dosage form solidified by a solid oil such as wax or an oily gelling agent, and in addition, powder, oil agent, etc. are blended. The oily solid cosmetic can be obtained by mixing each component constituting the cosmetic, heating and melting it, pouring it into a container or a mold for filling, and cooling.

[0003] In an oily solid cosmetic, stability over time, especially sweating, is not preferable from the viewpoint of quality retention. Sweating is a phenomenon in which the oil component in the preparation appears on the surface of the cosmetic over time or during high-temperature storage due to changes in the crystal structure caused by temperature changes, etc.

[0004] As a technique for suppressing sweating in such an oily solid cosmetic, Patent Document 1 discloses using a combination of N-lauroyl-L-glutamic acid dibutylamide and N-2-ethylhexanoylglutamic acid dibutylamide as a gelling agent. Further, Patent Document 2 discloses using a combination of spherical anhydrous silicic acid, fumed anhydrous silicic acid, and a paste-like polyglycerin fatty acid ester at 25°C in a cosmetic containing no microplastic beads.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] In base makeup products such as foundations, metal oxides such as titanium dioxide are often used to cover uneven skin tone and to protect against ultraviolet rays. In oil-based solid cosmetics, as mentioned above, the components are melted and then filled, but if the metal oxide content is high, aggregation of metal oxides tends to occur within the system.

[0007] Therefore, the present invention aims to provide an oil-based solid cosmetic composition containing a relatively large amount of titanium dioxide / zinc oxide that can suppress sweating while also suppressing the aggregation of metal oxides when the cosmetic composition is filled into molds, etc.

[0008] Another object of the present invention is to provide an oil-based solid cosmetic composition that adheres well to the skin. [Means for solving the problem]

[0009] The present invention relates to the following components (A) to (D); (A) Titanium dioxide and / or zinc oxide (B) Triglycerides of fatty acids with 20-28 carbon atoms (C) Waxes with a melting point of 60°C or higher (excluding component (B)) (D) Oil having at least one ester group in a paste-like state at 25°C This is an oily solid cosmetic composition containing the above, wherein the content of component (A) exceeds 10% by mass, and the content of component (D) exceeds 10% by mass. [Effects of the Invention]

[0010] According to the oil-based solid cosmetic composition of the present invention, even when a large amount of titanium dioxide and / or zinc oxide is included, aggregation of metal oxides can be suppressed when filling the cosmetic composition into molds, etc., and perspiration can be suppressed over time. [Modes for carrying out the invention]

[0011] Embodiments of the present invention will be described below. However, the present invention is not limited to the embodiments described below. In this specification, "X~Y" indicating a range includes X and Y, and means "X or more and Y or less". Unless otherwise specified, operations and measurements of physical properties, etc., are performed under room temperature (20~25℃) / relative humidity 45~55%RH conditions.

[0012] The first embodiment of the present invention comprises the following components (A) to (D); (A) Titanium dioxide and / or zinc oxide (B) Triglycerides of fatty acids with 20-28 carbon atoms (C) Waxes with a melting point of 60°C or higher (excluding component (B)) (D) Oil having at least one ester group in a paste-like state at 25°C This is an oily solid cosmetic composition containing the above, wherein the content of component (A) exceeds 10% by mass, and the content of component (D) exceeds 10% by mass.

[0013] With the above configuration, even if a large amount of titanium dioxide and / or zinc oxide is included, the aggregation of metal oxides during the filling of the cosmetic into molds, etc., can be suppressed, and sweating over time can also be suppressed.

[0014] In base makeup cosmetics such as foundations, it is necessary to include a certain amount or more of titanium dioxide or zinc oxide to improve coverage and UV protection. However, such metal oxides tend to aggregate in oils used to enhance the adhesion of cosmetics to the skin. In particular, these metal oxides were especially prone to aggregation in systems where wax necessary for solidifying oil-based cosmetics was melted for filling. Under these challenges, the inventors have found that by combining components (B) and (D), it is possible to provide a cosmetic that suppresses the aggregation of metal oxides when filling cosmetics into molds, etc., while suppressing perspiration over time, which is a problem arising from the dosage form of oil-based solid cosmetics. This is thought to be because components (B) and (D) interact to effectively thicken the oil phase, thereby improving the dispersion state of component (A) in the oil containing component (C), and thus suppressing aggregation and perspiration.

[0015] Furthermore, this composition results in a cosmetic product with excellent usability, including a feeling of closeness to the skin.

[0016] The following describes each component contained in the oil-based solid cosmetic composition of the first embodiment.

[0017] In this specification, "oil-based solid cosmetic composition" refers to a solid cosmetic composition mainly containing oily components. Here, the oily components are preferably present in an amount of 35% by mass or 40% by mass or more of the cosmetic composition, and the total content of components (B) to (E) may be 35% by mass or 40% by mass or more.

[0018] (Component (A): Titanium dioxide and / or zinc oxide (hereinafter simply referred to as titanium dioxide / zinc oxide)) The titanium dioxide / zinc oxide used as component (A) is not particularly limited in terms of its shape (spherical, plate-like, needle-like, etc.) or particle structure (porous, non-porous, etc.), as long as it is the type commonly used in cosmetics.

[0019] The average particle diameter of component (A) is usually 10 to 1,000 nm, and for example, it may be 20 to 800 nm, or 20 to 500 nm. The average particle diameter can be measured, for example, as the volume-based median diameter (particle diameter corresponding to 50% of the integrated distribution value) by laser diffraction / scattering method.

[0020] Since the effects of the present invention are further exhibited, component (A) preferably contains at least titanium oxide, and component (A) may be titanium oxide.

[0021] Component (A) may be surface-treated with a surface treatment agent (it may be surface-treated titanium oxide / surface-treated zinc oxide). From the viewpoint of suppressing powder aggregation, component (A) is preferably surface-treated with a hydrophobizing treatment agent (it is preferable to contain a hydrophobizing treatment agent as the surface treatment agent).

[0022] Specific examples of hydrophobic treatment agents include fluorine-based compounds such as perfluoropolyethers, perfluoroalkyl phosphates, perfluoroalkylalkoxysilanes, and fluorine-modified silicones; silicone-based compounds such as dimethylpolysiloxane, methylhydrogenpolysiloxane, cyclic silicones, organopolysiloxanes with trialkoxy groups at one or both ends, cross-linked silicones, silicone resins, fluorine-modified silicone resins, and acrylic-modified silicones; metal soaps such as aluminum stearate, aluminum myristate, zinc stearate, and magnesium stearate; and proline, hydroxyproline, alanine, and glycerides. Examples include amino acid compounds such as sarcosine, glutamic acid, aspartic acid, lysine and their derivatives, N-acylated amino acids and their salts; lecithin, hydrogenated lecithin; alkylsilanes such as methyltrimethoxysilane, ethyltrimethoxysilane, hexyltrimethoxysilane, octyltrimethoxysilane, octyltriethoxysilane, and triethoxycaprylylsilane; oils such as polyisobutylene, waxes, fats and oils, fatty acids (e.g., stearic acid), ester oils (e.g., isostearyl sebacate), and glycerin fatty acid esters; and organic titanates such as isopropyltriisostearoyl titanate. These hydrophobic agents may be used individually or in combination of two or more. In addition, titanium dioxide / zinc oxide may be treated with aluminum hydroxide in addition to these hydrophobic agents.

[0023] Among these hydrophobic agents, from the viewpoint of suppressing the aggregation of component (A), it is preferable that the hydrophobic agent contains at least one selected from the group consisting of amino acid compounds, silicone compounds, and oils, more preferably an amino acid compound, and even more preferably at least one selected from the group consisting of N-acylated amino acids and their salts. For example, if the hydrophobic agent contains an amino acid compound, the amino acid compound may be present in the hydrophobic agent at a concentration of 30% by mass or more, 40% by mass or more, or 50% by mass or more (up to 100% by mass). Also, if the surface treatment agent contains an amino acid compound, the amino acid compound may be present in the surface treatment agent at a concentration of 30% by mass or more, 40% by mass or more, or 50% by mass or more (up to 100% by mass).

[0024] In N-acylated amino acids and their salts, the acyl group is preferably a saturated or unsaturated linear, branched, or cyclic acyl group having 6 to 30 carbon atoms, more preferably a saturated or unsaturated linear or branched acyl group having 8 to 20 carbon atoms, and even more preferably a saturated linear acyl group having 12 to 18 carbon atoms. The carbon number referred to here means the number of carbon atoms in a single acyl group if multiple acyl groups are present. Examples of acyl groups include lauroyl, myristoyl, palmitoyl, stearoyl, isostearoyl, and oleoyl groups.

[0025] Examples of salts include salts with sodium, potassium, magnesium, calcium, aluminum, zinc, monoethanolamine, diethanolamine, and triethanolamine, with sodium, magnesium, calcium, and triethanolamine being preferred, sodium and magnesium being more preferred, and sodium being even more preferred.

[0026] Examples of N-acyl amino acids include, for example, lauroyl glutamic acid, myristoyl glutamic acid, stearoyl glutamic acid, oleyl glutamic acid, coconut oil fatty acid acyl glutamic acid, lauroyl aspartic acid, myristoyl aspartic acid, oleyl aspartic acid, coconut oil fatty acid aspartic acid, dilauroyl glutamic acid lysine, lauroyl lysine, and palmitoyl sarcosine.

[0027] In this embodiment, since powder aggregation can be further reduced, the N-acyl amino acid (salt) is preferably at least one selected from the group consisting of dilauroyl glutamate lysine, stearoyl glutamate, lauroyl aspartate, palmitoyl sarcosine, lauroyl lysine, and their salts; more preferably at least one selected from the group consisting of dilauroyl glutamate lysine salt, stearoyl glutamate salt, lauroyl aspartate salt, palmitoyl sarcosine salt, and lauroyl lysine; even more preferably at least one selected from the group consisting of dilauroyl glutamate lysine sodium, stearoyl glutamate sodium, stearoyl glutamate disodium, lauroyl aspartate sodium, palmitoyl sarcosinate sodium, and lauroyl lysine; and even more preferably dilauroyl glutamate lysine sodium and / or stearoyl glutamate disodium.

[0028] Conventional known methods can be used for surface treatment. For example, the surface treatment agent and the powder particles to be treated are added to a solvent, stirred with a ball mill or the like, dried as necessary, washed with water, filtered repeatedly to remove impurities, and then dried and pulverized to obtain the desired surface-treated powder. Furthermore, several types of compounds that serve as surface treatment agents can be used to surface-treat the material simultaneously, or the material can be surface-treated with one compound first, and then further surface-treated with other compounds.

[0029] Titanium dioxide / zinc oxide as component (A) may be included in the form of a composite powder. Examples of such composite powders include titanium dioxide-coated mica, silicon dioxide-titanium dioxide-coated mica, zinc oxide-titanium dioxide-coated mica, zinc oxide-iron oxide-titanium dioxide-coated mica, titanium dioxide-coated glass powder, iron oxide-titanium dioxide-coated glass powder, titanium dioxide-coated synthetic fluorphlogopite, titanium dioxide-coated nylon, iron oxide-coated titanium-mica, zinc oxide-coated titanium-mica, barium sulfate-coated titanium-mica, and organic pigment-coated titanium-mica.

[0030] The content of component (A) is preferably more than 10% by mass, 12% by mass or more, and more preferably 15% by mass or more, relative to the oily solid cosmetic composition, taking into consideration the cosmetic effect of component (A). Furthermore, from the viewpoint of suppressing powder aggregation, the content of component (A) is preferably less than 50% by mass, more preferably 40% by mass or less, and even more preferably 35% by mass or less. The content of component (A) is preferably more than 10% by mass and less than 50% by mass, more preferably 12 to 40% by mass, and even more preferably 15 to 35% by mass. In the case of surface-treated titanium dioxide / zinc oxide, the content of component (A) includes the surface treatment agent. Furthermore, in the case of a composite powder of titanium dioxide / zinc oxide, the titanium dioxide / zinc oxide in the composite powder is considered component (A), and the content of component (A) is the value obtained by subtracting the amount of powders other than titanium dioxide / zinc oxide from the total amount of composite powder.

[0031] (Component (B): Triglycerides of fatty acids with 20-28 carbon atoms) As triglycerides of fatty acids having 20 to 28 carbon atoms, triglycerides of fatty acids having 20 to 24 carbon atoms are more preferred, and glyceryl tribehenate (tribehenin), which is a triglyceride of behenic acid (22 carbon atoms), is even more preferred.

[0032] The content of component (B) is preferably 0.05 to 10% by mass, more preferably 0.1 to 8% by mass, even more preferably 0.3 to 7% by mass, even more preferably 0.5 to 5% by mass, and particularly preferably 0.8 to 3% by mass, relative to the oily solid cosmetic composition, from the viewpoint of the effects of component (B).

[0033] (Component (C): Wax with a melting point of 60°C or higher) Component (C) is used to solidify oil-based solid cosmetics.

[0034] Examples of component (C) include hydrocarbon waxes such as paraffin wax, ceresin wax, ozokerite wax, microcrystalline wax, synthetic wax, polyethylene wax, and ethylene-propylene copolymer; beeswax, bleached beeswax, candelilla wax, carnauba wax, rice wax, privet wax, montan wax, sunflower wax, and 12-hydroxystearic acid. The wax of component (C) may be used individually or in combination of two or more types.

[0035] From the viewpoint of shape stability of oil-based solid cosmetics, component (C) preferably contains a wax with a melting point of 70°C or higher. A preferred embodiment is that component (C) preferably contains at least one selected from the group consisting of paraffin wax, microcrystalline wax, synthetic wax, ethylene-propylene copolymer, polyethylene wax, candelilla wax, and carnauba wax, and more preferably contains at least one selected from the group consisting of paraffin wax, microcrystalline wax, synthetic wax, ethylene-propylene copolymer, and polyethylene wax. The upper limit of the melting point of component (C) is not particularly limited, but may be 110°C or lower.

[0036] The melting point of wax can be measured using a differential scanning calorimeter (DSC).

[0037] Furthermore, component (C) does not contain the triglycerides of fatty acids with 20 to 28 carbon atoms as described above (B).

[0038] The content of component (C) is preferably 1 to 10% by mass, more preferably 3 to 9% by mass, and even more preferably 3 to 8% by mass, relative to the oil-based solid cosmetic composition, taking into consideration shape stability and adhesion. Furthermore, the content of wax with a melting point of 70°C or higher is preferably 1 to 10% by mass, more preferably 3 to 9% by mass, and even more preferably 3 to 8% by mass, relative to the oil-based solid cosmetic composition.

[0039] (Component (D): An oily agent having at least one ester group that forms a paste at 25°C) "Paste-like at 25°C" means that the oily component exhibits high viscosity at 25°C and has sufficient fluidity to allow visual deformation when an equal weight is placed on it at 25°C. Furthermore, it is preferable that the oil has a melting point at temperatures above 25°C (preferably 30°C or higher and less than 60°C, more preferably 35°C or higher and less than 60°C). "Paste-like at 25°C" refers, for example, to a state where the viscosity at 25°C exceeds 10,000 mPa·s and is 500,000 mPa·s or less. This viscosity can be measured using a single-cylindrical rotational viscometer, model VS-A1 (manufactured by Shibaura Systems Co., Ltd.), after leaving the sample at 25°C for one day. Normally, components (D) and (C) are distinguished, but if components (C) and (D) overlap, component (D) does not include component (C). "Having an ester group" refers to a compound having an -COO- ester bond.

[0040] Component (D) includes, for example, N-acyl amino acid esters such as di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate, phytosteryl isostearate, phytosteryl oleate, phytosteryl hydroxystearate, and di(phytosteryl / isostearyl / cetyl / stearyl / behenyl) dilinoleate; dipentaerythrityl fatty acid esters such as hexa(hydroxystearate / stearate / rosinate) dipentaerythrityl, hexaoxystearate dipentaerythrityl, rosinate dipentaerythrityl, and tripolyhydroxystearate dipentaerythrityl; macadamia nut oil fatty acid phytosteryl, butyrate phytosteryl, nonanoate phytosteryl, caprylic / caprate phytosteryl, ricinoleate phytosteryl, canola oil fatty acid glycerides, phytosteryl rapeseed glycerides, and macadamia nut oil fatty acid Examples include sterol fatty acid esters such as phytosteryl, cholesteryl stearate, cholesteryl isostearate, cholesteryl hydroxystearate, cholesteryl oleate, dihydrocholesteryl oleate, branched fatty acid (C12-31) cholesteryl, macadamia nut oil fatty acid cholesteryl, macadamia nut oil fatty acid dihydrocholesteryl, sunflower seed oil fatty acid phytosteryl, rice bran oil fatty acid phytosteryl, and lanolin fatty acid cholesteryl; dimer acid esters such as dimer dilinoleyl (phytosteryl / isostearyl / cetyl / stearyl / behenyl), dimer dilinoleyl bis(behenyl / isostearyl / phytosteryl), and di(isostearyl / phytosteryl) dimer dilinoleate; and hydrogenated castor oil fatty acid esters such as hydrogenated castor oil isostearate and hydrogenated castor oil monohydroxystearate. These components (D) may be used individually or in combination of two or more.

[0041] Among these, component (D) preferably contains at least one selected from the group consisting of N-acyl amino acid esters, dipentaerythritol fatty acid esters, dimer acid esters, and sterol fatty acid esters, from the viewpoint of effective thickening of the oil phase with component (B), and more preferably contains at least one selected from the group consisting of N-acyl amino acid esters, dipentaerythritol fatty acid esters, and sterol fatty acid esters, and from the viewpoint of improving adhesion, it is preferable to use N-acyl amino acid esters and dipentaerythritol fatty acid esters in combination. When N-acyl amino acid esters and dipentaerythritol fatty acid esters are used in combination, the mass ratio of N-acyl amino acid esters to dipentaerythritol fatty acid esters may be N-acyl amino acid esters: dipentaerythritol fatty acid esters = 1:0.1 to 10, or 1:0.5 to 5. A preferred embodiment of component (D) comprises at least one selected from the group consisting of di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate, dipentaerythrityl hexa(hydroxystearate / stearate / rosinate), dimer dilinoleate (phytosteryl / isostearyl / cetyl / stearyl / behenyl), and cholesteryl hydroxystearate, and also comprises at least one selected from the group consisting of di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate, dipentaerythrityl hexa(hydroxystearate / stearate / rosinate), and cholesteryl hydroxystearate.

[0042] The content of component (D) in the oily solid cosmetic composition is greater than 10% by mass, preferably 15-60% by mass, more preferably 18-55% by mass, even more preferably 20-50% by mass, and particularly preferably 23-45% by mass. A content above the lower limit makes it easier to obtain the effects of component (D), such as sweat suppression and powder aggregation, while a content below the upper limit results in excellent adhesion to the skin.

[0043] (Component (E): Liquid oil at 25°C) The oil-based solid cosmetic composition of the present invention may further contain component (E): an oil that is liquid at 25°C. Liquid at 25°C means, for example, a state in which the viscosity at 25°C is 10,000 mPa·s or less. The viscosity can be measured using a single-cylinder rotational viscometer, model VS-A1 (manufactured by Shibaura Systems Co., Ltd.), after leaving the sample at 25°C for one day.

[0044] Note that the component (E) liquid oil at 25°C referred to here does not include powdered surface treatment agents.

[0045] Examples of liquid oils at 25°C include hydrocarbon oils such as liquid paraffin, squalane, polybutene, polyisobutylene, α-olefin oligomer, isododecane, light liquid isoparaffin, and heavy liquid isoparaffin; diisobutyl adipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, cetyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, isostearyl 2-ethylhexanoate, caprylic / capric triglyceride, neopentyl glycol dicaprate, and dicaprine. Propylene glycol acid, glyceryl tri-2-ethylhexanoate (triethylhexanoin), pentaerythrityl etraethylhexanoate, polyglyceryl-10 deca-2-ethylhexanoate, isotridecyl isononanoate, isononyl isononanoate, diisopropyl sebacate, di-2-ethylhexyl sebacate, isopropyl myristate, octyldodecyl myristate, isostearyl myristate, myristyryl myristate, isopropyl palmitate, cetyl palmitate, 2-ethylhexyl palmitate, 2-Ethylhexyl Therate, Octyldodecyl Isostearate, Isostearyl Isostearate, 2-Ethylhexyl Isostearate, Isopropyl Isostearate, Trimethylolpropane Triisostearate, Ethylhexyl Methoxycinnamate, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Octyldodecyl Stearoyl Stearate, Polyglyceryl-2 Isostearate, Polyglyceryl-2 Diisostearate, Polyglyceryl-2 Triisostearate, Polyglyceryl Tetraisostearate Ceryl-2, dipentaerythrityl tetraisostearate, polyglyceryl-10 decaisostearate, oleyl oleate, octyldodecyl oleate, decyl oleate, triethyl citrate, di-2-ethylhexyl succinate, diisostearyl malate, tridecyl trimellitate, coconut oil, olive oil, palm oil, macadamia nut oil, meadowfoam oil, jojoba oil, rapeseed oil, rice bran oil, castor oil, mink oil, alkyl (C12-15) ester oils, etc.; fatty acids such as isostearic acid and oleic acid;Examples include higher alcohols such as oleyl alcohol, isostearyl alcohol, octyldodecanol, and decyltetradecanol; silicone oils such as dimethylpolysiloxane (kinematic viscosity 1-1000 CS), cyclomethicone, caprylyl methicone, dimethiconol, methylphenylpolysiloxane, diphenylpolysiloxane, and decamethylcyclopentasiloxane; and fluorinated oils such as perfluorodecane, perfluorooctane, and perfluoropolyether. Component (E): Liquid oils at 25°C may be used alone or in combination of two or more.

[0046] Component (E) preferably contains at least an ester oil from the viewpoint of long-term stability (sweating).

[0047] The content of component (E) is preferably 1 to 50% by mass, more preferably 5 to 40% by mass, and even more preferably 10 to 30% by mass in the oil-based solid cosmetic composition.

[0048] (Other powders) In this invention, other powders besides titanium dioxide / zinc oxide may be incorporated. The powders are incorporated to provide cosmetic effects such as makeup effects.

[0049] The powder is not particularly limited in terms of shape (spherical, plate-shaped, spindle-shaped, needle-shaped, etc.), particle size (fuzzy, fine, pigment-grade, etc.), particle structure (porous, non-porous, etc.). Examples of powders include inorganic powders, lustrous powders, organic powders, colored pigments, composite powders, polyethylene terephthalate-aluminum-epoxy laminated powder, polyethylene terephthalate-polymethyl methacrylate laminated powder, etc.

[0050] Examples of inorganic powders include carbon black, magnesium carbonate, calcium carbonate, chromium oxide, chromium hydroxide, aluminum silicate, magnesium silicate, magnesium aluminum silicate, zinc oxide, aluminum oxide, cerium oxide, magnesium oxide, zirconium oxide, iron oxide, mica, synthetic mica, sericite, synthetic sericite, (fluoride / hydroxide / oxide) / (Mg / K silicon), kaolin, silicon carbide, barium sulfate, boron nitride, silica, and glass powder.

[0051] Examples of lustrous powders include bismuth oxychloride, iron oxide-treated mica, glass powder, and aluminum powder.

[0052] Examples of organic powders include metal soap powders such as zinc laurate, zinc myristate, zinc stearate, magnesium laurate, magnesium myristate, and magnesium stearate; nylon, polymethylsilsesquioxane, crosslinked organopolysiloxane polymers; polystyrene, polyurethane, polyethylene, polypropylene, polymethacrylate esters such as polymethyl methacrylate and crosslinked polymethacrylate esters such as methyl methacrylate crosspolymers; polymethyl methacrylate and polyisoprene composites; polyacrylic acid esters; acrylonitrile-methacrylic acid copolymer powders; polytetrafluoroethylene; and (HDI / PPG / polycaprolactone) crosspolymers. Examples of cross-linked organopolysiloxane polymers include partially cross-linked methylpolysiloxanes such as (dimethicone / vinyl dimethicone) crosspolymer, partially cross-linked methylphenylpolysiloxanes such as (dimethicone / phenyl dimethicone) crosspolymer, partially cross-linked polyether-modified silicones such as dimethicone copolyol crosspolymer, partially cross-linked alkyl-modified silicones, and partially cross-linked alkyl-polyether-modified silicones such as (lauryl dimethicone-PEG) crosspolymer. For example, under INCI names, examples include (dimethicone / vinyl dimethicone) crosspolymer, (dimethicone / phenyl vinyl dimethicone) crosspolymer, (dimethicone / vinyl dimethicone / methicone) crosspolymer, (dimethicone / lauryl dimethicone) crosspolymer, (diphenyl dimethicone / vinyl diphenyl dimethicone / silsesquioxane) crosspolymer, and (vinyl dimethicone / methicone silsesquioxane) crosspolymer.

[0053] Examples of colored pigments include inorganic red pigments such as red iron oxide (red iron oxide) and iron hydroxide, inorganic brown pigments such as γ-iron oxide, inorganic yellow pigments such as yellow iron oxide and ochre, inorganic black pigments such as black iron oxide and carbon black, inorganic purple pigments such as manganese violet and cobalt violet, inorganic green pigments such as chromium hydroxide, chromium oxide, cobalt oxide, and cobalt titanate, inorganic blue pigments such as Prussian blue and ultramarine, tar-based dyes lakeped with aluminum, natural dyes lakeped, and synthetic resin powders that are composites of these powders. Examples of tar dyes include Red No. 3, Red No. 104, 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. 505, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Yellow No. 204, Yellow No. 401, Blue No. 1, Blue No. 2, Blue No. 201, Blue No. 404, Green No. 3, Green No. 201, Green No. 204, Green No. 205, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 206, Orange No. 207, and others.

[0054] Examples of composite powders include iron oxide-coated mica and zinc oxide-containing silicon dioxide.

[0055] The powder may be a surface-treated powder. The type, amount, and method of surface treatment are the same as those described in the component (A) section above.

[0056] Furthermore, although not particularly limited, talc, mica, synthetic mica, and surface-treated powders thereof can be used as corrective materials (materials other than functional materials that impart cosmetic effects, such as pigments) in oil-based solid cosmetics. These corrective materials are present in the oil-based solid cosmetic in amounts of, for example, 1 to 60% by mass, and may also be 5 to 40% by mass.

[0057] (Other ingredients) In addition to the above components, surfactants commonly used in oil-based solid cosmetics, water, aqueous components, preservatives, antioxidants, cosmetic ingredients, antibacterial agents, chelating agents (such as EDTA), polyhydric alcohols, etc., may be appropriately included within a range that does not hinder the effects of the present invention. For stability reasons, the amount of water is preferably 5% by mass or less, 3% by mass or less, or 1% by mass or less.

[0058] (Application) The oil-based solid cosmetic composition of this embodiment is applicable to makeup cosmetics such as foundations, concealers, eye colors (eyeshadows), sunscreens, and makeup bases. Preferably, it is used as a foundation or concealer, where the effects of the present invention are expected to be even more pronounced. Methods of use include applying it with hands or fingers, or impregnating it into a puff or sponge.

[0059] (Manufacturing method) Oil-based solid cosmetic compositions can be obtained by generally known manufacturing methods. For example, components (A) to (E), and other components as needed, can be mixed, heated and melted above the melting point of the wax of component (C), other components as needed, poured into a container or mold, filled, and cooled to obtain the composition. In terms of shape, it can be used in any form, such as filled in a dish-shaped container, filled in a jar container, or molded into a stick shape, but it is preferable to fill it in a dish-shaped container or a jar container in which the effects of the present invention are particularly exhibited.

[0060] Furthermore, the present invention may also employ the following configuration.

[0061] 1. The following components (A) to (D); (A) Titanium dioxide and / or zinc oxide (B) Triglycerides of fatty acids with 20-28 carbon atoms (C) Waxes with a melting point of 60°C or higher (excluding component (B)) (D) Oil having at least one ester group in a paste-like state at 25°C An oil-based solid cosmetic composition comprising, wherein the content of component (A) exceeds 10% by mass, and the content of component (D) exceeds 10% by mass.

[0062] 2. The oily solid cosmetic composition described in 1, further comprising component (E) a liquid oil at 25°C.

[0063] 3. The oily solid cosmetic composition according to 1. or 2., wherein component (A) is a metal oxide that has been surface-treated with a hydrophobic treatment agent.

[0064] 4. The oily solid cosmetic composition according to 3, wherein the hydrophobic treatment agent contains an amino acid-based compound.

[0065] 5. An oily solid cosmetic composition according to any one of 1 to 4, wherein component (A) contains titanium dioxide.

[0066] 6. An oily solid cosmetic composition according to any one of 1 to 5, wherein component (C) contains a wax having a melting point of 70°C or higher.

[0067] 7. An oily solid cosmetic composition according to any one of 1 to 6, wherein component (D) comprises at least one selected from the group consisting of N-acyl amino acid esters, dipentaerythritol fatty acid esters, dimer acid esters, and sterol fatty acid esters.

[0068] 8. An oily solid cosmetic composition according to any one of 1 to 7, wherein the component (B) is glyceryl tribehenate. [Examples]

[0069] The effects of the present invention will be explained using the following examples and comparative examples. In the examples, the units "parts" or "%" may be used, but unless otherwise specified, they represent "parts by mass" or "mass%". Unless otherwise specified, each operation is performed at room temperature (25°C).

[0070] (Examples 1-15 and Comparative Examples 1-7) Oil-based solid cosmetic (concealer) formulations shown in Table 1 below were prepared using the manufacturing method described below, and evaluated using the evaluation methods 1 to 4 described below.

[0071] (Manufacturing method) A: Components 1-7 were uniformly mixed and dissolved at 100°C. Components 8-18 were added to the solution obtained in B:A, and the mixture was treated with a three-roller system (manufactured by EXAKT) to obtain a roller-treated product. C: The roller-treated material was heated and dissolved until it became liquid. D: Filled into the designated gold dish.

[0072] (Evaluation method 1: Coverage) A sample is applied to the black portion of the opacity test paper (JIS K5101-4:2004) to a thickness of 1500 μm using a doctor blade, and then dried at 70°C for 1 hour to prepare an opacity test paper with a decorative film. The L*a*b* values ​​of only the black portion of the opacity test paper (JIS K5101-4:2004) and the L*a*b* values ​​of the opacity test paper with the coating (black portion) are measured using a NEC colorimeter, and the color difference ΔE is calculated.

[0073] The calculated ΔE was evaluated and judged according to the following criteria. <Judgment criteria> ◎: ΔE10 or higher ○: ΔE6 or greater and less than 10 △: ΔE 3 or greater, less than 6 ×: ΔE is less than 3.

[0074] (Evaluation method 2: Presence or absence of sweating) Each sample was stored at 50°C for one month, and its condition was evaluated by visual inspection to check for the presence of oil droplets or aqueous components (sweating). The evaluation was then determined according to the following criteria. (Judgment): (Evaluation) ◎: No sweating observed at all ○: Slight sweating occurs at high temperatures, but disappears when the temperature returns to room temperature. △: Sweating occurs at high temperatures and disappears when the temperature returns to room temperature, but sweat marks remain on the surface. ×: Significant sweating is observed at high temperatures, and the sweating does not disappear even when the temperature returns to room temperature.

[0075] (Evaluation method 3: Presence or absence of powder aggregation) During filling (melting temperature 100°C → filling temperature 90°C), the presence or absence of powder agglomeration was visually observed and judged on a four-point scale according to the following evaluation criteria.

[0076] <4-level evaluation criteria> (Rating): (Evaluation) ◎: No powder aggregation ○: Almost no powder aggregation. △: Slight powder aggregation present ×: Powder aggregation is present.

[0077] (Evaluation method 4: Adhesion to the skin) Twenty cosmetic product evaluation panel members used each sample to evaluate its "adhesion to the skin" on a 5-point scale using the absolute evaluation method described below. For each sample, the average score was calculated from the sum of all panel members' scores, and the final evaluation was made according to the following criteria. Adhesion to the skin refers to the condition that, when applied to the skin, the cosmetic does not flake off and a uniform cosmetic film is formed on the skin.

[0078] <5-point rating scale> (Rating): (Evaluation result) 5: I feel a very close fit. 4: Feeling a sense of closeness 3: I feel a slight sense of closeness. 2: I don't feel much of a sense of closeness. 1: I don't feel any sense of closeness at all. <Judgment criteria> (Judgment): (Average score) 5: Exceeding 4.5 points 4: Above 4.0 points and below 4.5 points. 3: Above 3.5 points and below 4.0 points 2: Above 3.0 points and below 3.5 points. 1: 3.0 points or less.

[0079] The results of each evaluation are shown in Table 1.

[0080] [Table 1-1]

[0081] [Table 1-2]

[0082] From the above results, the oil-based solid cosmetic composition of the example had high coverage, suppressed perspiration, and suppressed powder aggregation during filling. Furthermore, the oil-based solid cosmetic composition of the example also had excellent adhesion. On the other hand, Comparative Examples 1 and 2, which did not contain component (A) or contained 10% by mass of component (A), did not exhibit the coverage function of component (A). In addition, Comparative Example 3, which did not contain component (B), showed powder aggregation during filling into the mold. It should be noted that when component (A) was replaced with mica in a similar formulation, no powder aggregation was observed, indicating that the powder aggregation was due to component (A). In addition, Comparative Example 5, which did not contain component (D), and Comparative Example 6, which contained 10% by mass of component (D), caused perspiration and did not exhibit satisfactory adhesion. Comparative Example 4, which did not contain component (C), did not solidify. In addition, Comparative Example 7, which used petrolatum, a hydrocarbon paste oil, instead of component (D), showed powder aggregation during filling into the mold.

[0083] Example: Oil-based solid concealer (Component) (mass%) 1. Paraffin-microcrystalline wax mixture (Component (C)) (*5) 3.0% 2. Synthetic wax / polyethylene (component (C)) (*6) 3.0% 3. Beeswax (Component (C), melting point 64℃) (*11) 1.0% 4. Tribehenin (Component (B)) (*4) 2.0% 5. Hexa(hydroxystearic acid / stearic acid / rosinic acid)dipentaerythrityl (ingredient (D)) (*7) 20.0% 6. Tri(caprylic / capric acid) glyceryl (ingredient (E)) 15.0% 7. Isotridecyl isononanoate (Component (E)) 2.5% 8. Dimethicone (ingredient (E)) (*12) 3.0% 9. Diisostearyl malate (ingredient (E)) (*13) 1.0% 10. Ethylhexyl Methoxycinnamate (Component (E)) 3.0% 11. Dibutylhydroxytoluene 0.01% 12. Dipropylene glycol 0.5% 13. Methylparaben 0.1% 14. Lecithin 0.5% 15. Aluminum hydroxide / disodium stearoyl glutamate treated titanium dioxide (Ingredient (A)) (*1) 15.0% 16. Red iron oxide 0.1% 17. Ultramarine 2.0% 18. Methyl methacrylate crosspolymer (*14) 7.0% 19. (Vinyl dimethicone / methicone silcesoxane) crosspolymer (*15) 5.0% 20. Mica remaining amount 21. A mixture of lavender oil, grape seed oil, peach kernel oil, tocopheryl acetate, and ascorbyl tetrahexyldecanoate (a mixture of beauty ingredients) 1.0% *11: WHITE BEES WAX (manufactured by Miki Chemical Industry Co., Ltd.) *12: KF-96A-100CS (manufactured by Shin-Etsu Silicone Co., Ltd.) *13: Cosmoll 222 (manufactured by Nisshin Oillio Group) *14: Matsumoto Microsphere M-305QD7 (manufactured by Matsumoto Oil & Fat Pharmaceutical Co., Ltd.) *15: KSP-102 (manufactured by Shin-Etsu Chemical Co., Ltd.).

[0084] (Manufacturing method) A: Components 1-13 and 21 were uniformly dissolved at 100-110°C. Ingredients 14-20 were added to B:A and uniformly mixed and dispersed. After dissolving at 100°C and degassing, the mixture was filled into containers at 90°C and cooled to obtain a concealer.

[0085] The oil-based solid concealer of the above example had high coverage, suppressed sweating, and inhibited powder aggregation during filling. Furthermore, the oil-based solid concealer of the above example also had excellent adhesion.

[0086] Example: Oil-based solid foundation (Component) (mass%) 1. (Ethylene / Propylene) Copolymer (Component (C)) (Melting point 95°C) (*16) 5.0% 2. Carnauba wax (component (C)) (melting point 83℃) (*17) 3.0% 3. Candelilla wax (component (C)) (melting point 73℃) (*18) 1.0% 4. Tribehenin (Component (B)) (*4) 2.0% 5. Lauroyl glutamate di(octyldodecyl / phytosteryl / behenyl) (ingredient (D)) (*8) 20.0% 6. Dimer dilinoleate (phytosteryl / isostearyl / cetyl / stearyl / behenyl) (ingredient (D)) (*19) 3.0% 7. Triethylhexanoin (Component (E)) 7.0% 8. Polyglyceryl-2 Isostearate (Ingredient (E)) (*20) 2.0% 9. Polyglyceryl-2 Diisostearate (Ingredient (E)) (*21) 1.0% 10. Polyglyceryl-2 Triisostearate (Component (E)) (*22) 5.0% 11,2-Cetyl ethylhexanoate (component (E)) 2.0% 12. Alkyl benzoate (C12-15) (Component (E)) (*23) 2.0% 13. Heavy liquid isoparaffin (component (E)) (*24) 1.0% 14. Diethylamino hydroxybenzoyl hexyl benzoate (ingredient (E)) (*25) 1.0% 15. Bis-ethylhexyloxyphenol methoxyphenyl triazine 2.0% 16. Dipropylene glycol 0.5% 17. Methylparaben 0.1% 18. Isostearyl sebacate / disodium stearoyl glutamate treated titanium dioxide (ingredient (A)) (*26) 25.0% 19. Triethoxycaprylylsilane-treated yellow iron oxide 5.0% 20. Triethoxycaprylylsilane-treated red iron oxide 1.5% 21. Triethoxycaprylylsilane-treated black iron oxide 0.01% 22. Silica (*47) 2.0% 23. Talc remaining amount *16: EPS wax (manufactured by Japan Natural Products Co., Ltd.) *17: TOWAX-1F6 (manufactured by Toa Chemical Co., Ltd.) *18: Refined Candelilla Wax SR-3 (manufactured by Nippon Natural Products Co., Ltd.) *19: PLANDOOL-H (manufactured by Nippon Seika Co., Ltd.) *20: Cosmoll 41V (manufactured by Nisshin Oillio Group Co., Ltd.) *21: Cosmoll 42V (manufactured by Nisshin Oillio Group Co., Ltd.) *22: Cosmoll 43V (manufactured by Nisshin Oillio Group Co., Ltd.) *23: FINSOLV TN (manufactured by INNOSPEC ACTIVE CHEMICALS) *24: Pearl Ream 18 (manufactured by NOF Corporation) *25: Ubinal A PLUS GRANULAR (manufactured by BASF) *26: NHS-Titanium CR-50 (manufactured by Miyoshi Chemical Co., Ltd.) *27: Silica microbead P-1505 (manufactured by JGC Catalysts & Chemicals Co., Ltd.).

[0087] (Manufacturing method) A: Components 1-17 were uniformly dissolved at 100-110°C. Components 18-23 were added to B:A and uniformly mixed and dispersed. After dissolving at 100°C and degassing, the mixture was filled into containers at 90°C and cooled to obtain an oil-based solid foundation.

[0088] The oil-based solid foundation of the above embodiment had high coverage, suppressed perspiration, and inhibited powder aggregation during filling. Furthermore, the oil-based solid foundation of the above embodiment also had excellent adhesion.

Claims

1. The following components (A) to (D): (A) Titanium dioxide and / or zinc oxide (B) Triglycerides of fatty acids with 20 to 28 carbon atoms (C) Wax with a melting point of 60°C or higher (excluding component (B)) (D) An oil having at least one ester group that is paste-like at 25°C An oil-based solid cosmetic composition comprising, wherein the content of component (A) exceeds 10% by mass, and the content of component (D) exceeds 10% by mass.

2. The oily solid cosmetic composition according to claim 1, further comprising component (E) a liquid oil at 25°C.

3. The oily solid cosmetic composition according to claim 1 or 2, wherein the component (A) is surface-treated with a hydrophobic treatment agent.

4. The oily solid cosmetic composition according to claim 3, wherein the hydrophobic treatment agent comprises an amino acid-based compound.

5. The oil-based solid cosmetic composition according to claim 1 or 2, wherein component (A) contains titanium dioxide.

6. The oil-based solid cosmetic composition according to claim 1 or 2, wherein component (C) comprises a wax having a melting point of 70°C or higher.

7. The oily solid cosmetic composition according to claim 1 or 2, wherein component (D) comprises at least one selected from the group consisting of N-acyl amino acid esters, dipentaerythritol fatty acid esters, dimer acid esters, and sterol fatty acid esters.

8. The oily solid cosmetic composition according to claim 1 or 2, wherein the component (B) is glyceryl tribehenate.

Images