Oil-in-water emulsion cosmetic composition

Abstract

The present invention provides an oil-in-water emulsion cosmetic composition containing hydrophobized pigment particles within oil-phase emulsion particles, which can provide an excellent matte finish. [Solution] The oil-in-water emulsion cosmetic composition of the present invention is an oil-in-water emulsion cosmetic composition having an aqueous phase 10 and an oil phase 20 dispersed in the aqueous phase 10, wherein barium sulfate particles 12 are dispersed in the aqueous phase 10, hydrophobized pigment particles 22 are dispersed in the oil phase, and the content of barium sulfate particles 12 is greater than 1.0% by mass.

Description

Technical Field

[0001] The present invention relates to an oil-in-water emulsified cosmetic composition, and particularly to an oil-in-water emulsified makeup cosmetic.

Background Art

[0002] An oil-in-water emulsified cosmetic composition containing an aqueous phase as a continuous phase provides a fresh, refreshing feeling when used, and thus is widely used as a base material for, for example, makeup cosmetics such as foundations, base cosmetics, sunscreens, or basic cosmetics such as emulsions.

[0003] In such an oil-in-water emulsified cosmetic composition, it is known to incorporate hydrophobized pigment particles into oil-phase emulsified particles (oil droplets).

[0004] For example, Patent Document 1 discloses an oil-in-water emulsified cosmetic comprising: (A) a pigment surface-treated with a surface treatment agent containing glutamic acid or aspartic acid acylated with a saturated fatty acid having 8 to 14 carbon atoms or a salt thereof; (B) an oil component; (C) a hydrophobic ultraviolet scattering agent; and (D) a water-soluble alkyl-substituted polysaccharide derivative, wherein the blending amount of the ultraviolet absorber is less than 1% by mass relative to the total amount of the cosmetic, the content of silicone oil is 10% by mass or less relative to the total amount of the cosmetic, and the components (A) and (C) are dispersed in the oil phase.

Prior Art Literature

Patent Literature

[0005]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0006] The present invention provides an oil-in-water emulsion cosmetic composition containing hydrophobized pigment particles within oil-phase emulsion particles, which can provide an excellent matte finish. [Means for solving the problem]

[0007] The following are embodiments of the present invention that achieve the above objectives.

[0008] <Aspect 1> An oil-in-water emulsion cosmetic composition having an aqueous phase and an oil phase dispersed in the aqueous phase, Barium sulfate particles are dispersed in the aqueous phase. Hydrophobized pigment particles are dispersed in the oil phase, and The content of the barium sulfate particles is greater than 1.0% by mass. Oil-in-water emulsion cosmetic composition. <Aspect 2> The composition according to embodiment 1, wherein the content of the barium sulfate particles is 2.0% by mass or more. <Aspect 3> The composition according to embodiment 1 or 2, wherein the aqueous phase contains a water-soluble polymer. <Aspect 4> The composition according to embodiment 3, wherein the water-soluble polymer is hydrolyzed starch. <Aspect 5> The composition according to any one of embodiments 1 to 4, wherein the aqueous phase contains ethanol. <Pattern 6> The composition according to any one of embodiments 1 to 5, wherein the aqueous phase contains a water-soluble active ingredient. <Aspect 7> The composition according to any one of embodiments 1 to 6, wherein the content of the hydrophobic treated pigment particles is 1.0 to 20.0% by mass. <Aspect 8> The composition according to any one of embodiments 1 to 7, wherein the oil phase contains a volatile silicone oil and a polar oil. <Pattern 9> A makeup cosmetic composition according to any one of embodiments 1 to 8. Effects of the Invention

[0009] According to the present invention, there is provided an oil-in-water emulsified cosmetic composition containing hydrophobized pigment particles in oil-phase emulsified particles, which can provide an excellent matte finish feeling. Brief Description of Drawings

[0010] [Figure 1] FIG. 1 is a diagram for conceptually explaining the action of the composition of the present invention. Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described in detail. The present invention is not limited to the following embodiments, and can be implemented with various modifications within the scope of the spirit of the invention.

[0012] <<Oil-in-Water Emulsified Cosmetic Composition>> The oil-in-water emulsified cosmetic composition of the present invention (hereinafter sometimes simply referred to as "the composition of the present invention") is an oil-in-water emulsified cosmetic composition having an aqueous phase and an oil phase dispersed in the aqueous phase, wherein barium sulfate particles are dispersed in the aqueous phase, hydrophobized pigment particles are dispersed in the oil phase, and a content of the barium sulfate particles is more than 1% by mass, which is an oil-in-water emulsified cosmetic composition.

[0013] ​Without being limited to theory, according to the composition of the present invention, as shown in Figure 1, barium sulfate particles 12 are dispersed in an aqueous phase 10, and hydrophobized pigment particles 22 are dispersed in an oil phase 20 (Figure 1(a)). It is thought that this allows, when the composition is applied to the skin 30 and the liquid component evaporates, the barium sulfate particles 12 dispersed in the aqueous phase 10 to adhere to the skin 30, and then the hydrophobized pigment particles 22 dispersed in the oil phase 20 to adhere thereon (Figures 1(b) and (c)). According to this, a lower layer 15 mainly composed of barium sulfate particles 10 and an upper layer 25 mainly composed of hydrophobized pigment particles 20 are provided (Figure 1(c)), which is considered to enable appropriately providing the matte feeling imparted by the barium sulfate particles 10 and the coloring effect imparted by the hydrophobized pigment particles 20.

[0014] Hereinafter, each component that can constitute the composition of the present invention will be described in detail.

[0015] <Aqueous Phase> The composition of the present invention has an aqueous phase, and an oil phase is dispersed in this aqueous phase.

[0016] (Water) The aqueous phase contains water. As the water, ion-exchanged water, distilled water, ultrapure water, tap water, or the like can be used.

[0017] In the composition of the present invention, the content of water may be 20.0 mass% or more, 25.0 mass% or more, 30.0 mass% or more, 35.0 mass% or more, or 40.0 mass% or more relative to the total amount of the composition of the present invention, and may be 90.0 mass% or less, 80.0 mass% or less, 70.0 mass% or less, 60.0 mass% or less, or 50.0 mass% or less.

[0018] (Barium Sulfate Particles) The aqueous phase contains dispersed barium sulfate particles, particularly plate-shaped barium sulfate particles. Barium sulfate particles, especially plate-shaped barium sulfate particles, possess excellent spreadability on the skin, moderate concealing power, and a soft-focus effect, as well as high hydrophilicity, allowing them to be stably included in the aqueous phase at high concentrations.

[0019] In the composition of the present invention, the content of barium sulfate particles may be more than 1.0% by mass, 1.5% by mass or more, 2.0% by mass or more, or 2.5% by mass or more, relative to the total amount of the composition of the present invention, and may also be 10.0% by mass or less, 8.0% by mass or less, 7.0% by mass or less, 6.0% by mass or less, or 5.5% by mass or less.

[0020] The average particle size of the barium sulfate particles may be 1.0 μm or larger, 3.0 μm or larger, 5.0 μm or larger, or 6.0 μm or larger, and may also be 30.0 μm or smaller, 25.0 μm or smaller, 20.0 μm or smaller, 15.0 μm or smaller, 10.0 μm or smaller, or 8.0 μm or smaller.

[0021] The average particle size of barium sulfate particles is the average value of the directional primary particle diameter (the distance between two parallel lines in a specific direction flanking a primary particle (measured for particles of any shape in the image)) in transmission electron microscope (TEM) or scanning electron microscope (SEM) images.

[0022] When the barium sulfate particles are plate-shaped barium sulfate particles, the aspect ratio may be 2 or more, 5 or more, or 10 or more, and may also be 100 or less, 80 or less, 60 or less, 40 or less, 35 or less, or 25 or less.

[0023] The aspect ratio of plate-shaped barium sulfate particles is determined by taking a TEM or SEM image and, for particles where the main surface of the plate-shaped barium sulfate particle faces forward, L is the average value of the constant-direction primary particle diameter (the distance between two parallel lines in a certain direction flanking the primary particle (measured for primary particles where the main surface faces forward in the image)), and for particles where the side surface of the plate-shaped barium sulfate particle faces forward (particles that appear rectangular), T is the average value of the thickness (μm) (length of the shorter side of the rectangle), and the ratio of these values ​​(L / T) is calculated as the ratio of these two values.

[0024] (Water-soluble polymer) The aqueous phase may contain a water-soluble polymer. The water-soluble polymer can function as a thickener and / or a film-forming agent. In relation to the present invention, the term "water-soluble polymer" is used as a concept that does not include the term "nonionic surfactant" listed below.

[0025] Examples of water-soluble polymers include acrylic water-soluble polymers and polysaccharide water-soluble polymers. Here, acrylic water-soluble polymers refer to water-soluble polymers whose main chain consists of monomer units derived from acrylic acid.

[0026] Preferred acrylic water-soluble polymers as thickeners include (acrylates / alkyl(C10-30) acrylate) crosspolymer, (ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymer, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer, and carbomers.

[0027] Preferred polysaccharide-based water-soluble polymers as thickeners include naturally derived polysaccharide-based water-soluble polymers, microbially derived polysaccharide-based water-soluble polymers, nonionic cellulose derivatives, anionic cellulose, cationized cellulose, and cationized guar gum. Examples of naturally derived polysaccharide-based water-soluble polymers include alginic acid, carrageenan, agar, fercelan, guar gum, quince seed, konjac mannan, tamarind seed gum, tara gum, dextrin, starch, locust bean gum, gum arabic, gatti gum, karaya gum, tragacanth gum, arabinogalactan, pectin, quince, chitosan, and hyaluronic acid. Examples of microbially derived polysaccharide-based water-soluble polymers include curdlan, xanthan gum, gellan gum, cyclodextrin, dextran, pullulan, chitosan, and hyaluronic acid. Examples of nonionic cellulose derivatives include microcrystalline cellulose, methylcellulose, ethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, and hydroxypropylmethylcellulose. Examples of anionic cellulose include carboxymethylcellulose. Examples of cationized cellulose include O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethylcellulose chloride.

[0028] Preferred water-soluble polymers as water-soluble film-forming agents include polysaccharide-based water-soluble polymers such as hydrolyzed corn starch, pullulan, etherified starch, chitosan, sodium alginate, locust bean gum, guar gum, methylcellulose, and carboxymethylcellulose, as well as synthetic polymers such as polyvinyl alcohol and polyvinylpyrrolidone, with hydrolyzed corn starch being particularly noteworthy.

[0029] If the aqueous phase contains a water-soluble polymer, its content may be 0.1% by mass or more, 0.2% by mass or more, 0.4% by mass or more, 0.6% by mass or more, or 0.8% by mass or more, relative to the total amount of the composition of the present invention, and may also be 5.0% by mass or less, 4.0% by mass or less, 3.0% by mass or less, 2.0% by mass or less, or 1.5% by mass or less. Furthermore, if the aqueous phase contains a water-soluble polymer preferred as a water-soluble film-forming agent, its content may be 0.1% by mass or more, 0.2% by mass or more, 0.3% by mass or more, or 0.4% by mass or more, relative to the total amount of the composition of the present invention, and may also be 2.0% by mass or less, 1.5% by mass or less, 1.0% by mass or less, 0.8% by mass or less, or 0.6% by mass or less.

[0030] (ethanol) The aqueous phase may contain ethanol. Ethanol can promote the vaporization of the aqueous phase when the composition of the present invention is applied to the skin, thereby enhancing the effects of the composition of the present invention.

[0031] If the aqueous phase contains ethanol, its content may be 1.0% by mass or more, 2.0% by mass or more, 3.0% by mass or more, 4.0% by mass or more, or 5.0% by mass or more, relative to the total amount of the composition of the present invention, or it may be 10.0% by mass or less, 9.0% by mass or less, 8.0% by mass or less, or 7.0% by mass or less.

[0032] (Water-soluble active ingredients) The aqueous phase may contain a water-soluble active ingredient. In this invention, "water-soluble active ingredient" refers to an ingredient that is water-soluble and exerts its function when applied to the skin. Here, the function of the water-soluble active ingredient means its ability to bring about some effect on the skin, particularly a beneficial effect (for example, moisturizing effect, firming effect, whitening effect, anti-wrinkle effect, or anti-spot effect).

[0033] In the present invention, water-soluble active ingredients include tocopherol acetate, glycylglycine, alkoxysalicylic acid or its salts, 1-piperidinepropionic acid or its salts, neutral amino acids or their peptides, vitamin A group or its derivatives, vitamin B group such as niacinamide or its derivatives, plant extracts, tranexamic acid or its derivatives, and fermentation extracts. Fermentation extracts include rice ferment products, particularly rice ferment products produced by Lactobacillus (Lactobacillus / rice ferment product).

[0034] In the composition of the present invention, if a water-soluble active ingredient is included, its content may be, for example, 0.1% by mass or more, 0.5% by mass or more, or 1.0% by mass or more, based on the total amount of the composition of the present invention, or it may be 5.0% by mass or less, 4.0% by mass or less, 3.0% by mass or less, 2.0% by mass or less, or 1.5% by mass or less.

[0035] (Nonionic surfactant) The aqueous phase may contain a nonionic surfactant. Although the nonionic surfactant is present in the aqueous phase, it can mainly be found at the interface between the oil droplets and the aqueous phase components because it has the function of emulsifying the oil droplets.

[0036] If the aqueous phase contains a nonionic surfactant, its content may be 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, or 2.0% by mass or more, relative to the total amount of the composition of the present invention, or it may be 10.0% by mass or less, 5.0% by mass or less, 3.0% by mass or less, 2.0% by mass or less, or 1.5% by mass or less.

[0037] Nonionic surfactants with HLB values ​​of 8.0 or higher, 10.0 or higher, 12.0 or higher, or 14.0 or higher, or 16.0 or lower, 15.5 or lower, or 15.0 or lower can be used. Here, HLB is a value that generally indicates the affinity of a surfactant for water and oil, and is a parameter known as the hydrophilic-lipophilic balance, which can be easily determined by known calculation methods such as the Griffin method.

[0038] Examples of nonionic surfactants include polyoxyalkylene alkyl ethers, polyalkylene glycol fatty acid esters, POE hydrogenated castor oil derivatives, POE alkyl ethers, POE-POP alkyl ethers, PEG fatty acid esters, polyglycerin fatty acid esters, POE glycerin fatty acid esters, PEG glyceryl isostearate, and silicone-based surfactants. In addition, nonionic surfactants such as polyglyceryl-2 diisostearate and sorbitan sesquiisostearate can also be used. Nonionic surfactants can be used alone or in combination of two or more types.

[0039] Examples of polyoxyalkylene alkyl ethers include polyoxyethylene behenyl ether and polyoxyethylene stearyl ether.

[0040] Examples of polyalkylene glycol fatty acid esters include polyethylene glycol monostearate and polyethylene glycol monooleate.

[0041] Examples of POE hydrogenated castor oil derivatives (PEG hydrogenated castor oil) include POE(20-100) hydrogenated castor oil derivatives. Specifically, these include POE(20) hydrogenated castor oil derivatives (i.e., PEG-20 hydrogenated castor oil), POE(40) hydrogenated castor oil derivatives (i.e., PEG-40 hydrogenated castor oil), POE(60) hydrogenated castor oil derivatives (i.e., PEG-60 hydrogenated castor oil), and POE(100) hydrogenated castor oil derivatives (i.e., PEG-100 hydrogenated castor oil). Note that "POE" is an abbreviation for "polyoxyethylene" and "PEG" is an abbreviation for "polyethylene glycol".

[0042] Examples of POE alkyl ethers include POE(2) lauryl ether, POE(4.2) lauryl ether, POE(9) lauryl ether, POE(5.5) cetyl ether, POE(7) cetyl ether, POE(10) cetyl ether, POE(15) cetyl ether, POE(20) cetyl ether, POE(23) cetyl ether, POE(4) stearyl ether, POE(20) stearyl ether, POE(7) oleyl ether, POE(10) oleyl ether, POE(15) oleyl ether. Examples include rail ethers, POE(20) oleyl ethers, POE(50) oleyl ethers, POE(10) behenyl ethers, POE(20) behenyl ethers, POE(30) behenyl ethers, POE(2)(C12-15) alkyl ethers, POE(4)(C12-15) alkyl ethers, POE(10)(C12-15) alkyl ethers, POE(5) secondary alkyl ethers, POE(7) secondary alkyl ethers, POE(9) alkyl ethers, POE(12) alkyl ethers, and the like.

[0043] Examples of POE·POP alkyl ethers include POE(1) polyoxypropylene (POP)(4) cetyl ether, POE(10) POP(4) cetyl ether, POE(20) POP(8) cetyl ether, POE(20) POP(6) decyltetradecyl ether, and POE(30) POP(6) decyltetradecyl ether.

[0044] Examples of PEG fatty acid esters include polyethylene glycol monolaurate (hereinafter abbreviated as PEG) (10), PEG monostearate (10), PEG monostearate (25), PEG monostearate (40), PEG monostearate (45), PEG monostearate (55), PEG monostearate (100), PEG monooleate (10), PEG distearate, and PEG diisostearate.

[0045] Examples of polyglycerol fatty acid esters include hexaglyceryl monolaurate, hexaglyceryl monomyristate, hexaglyceryl monostearate, hexaglyceryl monooleate, decaglyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, decaglyceryl monoisostearate, decaglyceryl monooleate, decaglyceryl distearate, and decaglyceryl diisostearate.

[0046] Examples of POE glycerin fatty acid esters include polyoxyethylene (POE)(5) glyceryl monostearate, POE(15) glyceryl monostearate, POE(5) glyceryl monooleate, and POE(15) glyceryl monooleate.

[0047] Examples of PEG-8 isostearate glyceryls include PEG-8 isostearate glyceryl, PEG-10 isostearate glyceryl, PEG-15 isostearate glyceryl, PEG-20 isostearate glyceryl, PEG-25 isostearate glyceryl, PEG-30 isostearate glyceryl, PEG-40 isostearate glyceryl, PEG-50 isostearate glyceryl, and PEG-60 isostearate glyceryl.

[0048] Examples of silicone-based surfactants include polyether-modified silicones, such as PEG(3) dimethicone, PEG(7) dimethicone, PEG(9) dimethicone, PEG(10) dimethicone, PEG(12) dimethicone, PEG(9) methyl ether dimethicone, PEG(10) methyl ether dimethicone, PEG(11) methyl ether dimethicone, PEG(32) methyl ether dimethicone, and PEG(9) polydimethylsiloxyethyl dimethicone.

[0049] (Moisturizer) The aqueous phase may contain a humectant.

[0050] As humectants, polyhydric alcohols, polyols, alkylene oxide derivatives, etc., can be used. More specifically, examples of humectants include glycerin, 1,3-butylene glycol, and dipropylene glycol.

[0051] If the aqueous phase contains a humectant, its content may be 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 total amount of the composition of the present invention, or it may be 10.0% by mass or less, 15.0% by mass or less, 10.0% by mass or less, or 8.0% by mass or less.

[0052] (Other ingredients) In addition to the components described above, the aqueous phase may optionally contain other components, as long as they do not impair the effects of the present invention.

[0053] Other such ingredients include neutralizing agents such as potassium hydroxide; dispersants such as isostearic acid, polyglyceryl-6 polyricinoleate, bisbutyldimethicone polyglyceryl-3, and sodium metaphosphate; antioxidants such as sodium pyrosulfite; chelating agents such as EDTA-3Na (trisodium salt of ethylenediaminetetraacetic acid); and preservatives such as phenoxyethanol.

[0054] <Oil Phase> The composition of the present invention has an oil phase dispersed in an aqueous phase, in which hydrophobized pigment particles are dispersed.

[0055] Furthermore, in the composition of the present invention, the dispersion of hydrophobic treated pigment particles in the oil phase can be confirmed, for example, by evaluating whether emulsification is possible as performed in the examples. In other words, if the pigment particles are not dispersed in the oil phase (for example, in an aggregated state), emulsification is difficult, so the fact that emulsification is possible suggests that the pigment particles are dispersed in the oil phase.

[0056] (Hydrophobic treated pigment particles) The hydrophobic treated pigment particles used in the composition of the present invention are pigment particles whose surface is treated with a hydrophobic agent, at least a portion of which is treated.

[0057] (Hydrophobic treated pigment particles (pigment particles)) The pigment particles themselves of the hydrophobic treated pigment particles can be of any shape (spherical, rod-shaped, needle-shaped, plate-shaped, irregular shape, flake-shaped, spindle-shaped, etc.), particle size (fuzzy, fine particles, pigment grade, etc.), or particle structure (porous, non-porous, etc.). Examples of such pigment particles include inorganic pigment powders (including natural mineral pigments or synthetic inorganic pigments, etc.), organic dyes, and organic pigment particles.

[0058] More specifically, examples of inorganic pigments include titanium dioxide, yellow iron oxide, red iron oxide, black iron oxide, talc, zinc oxide, silicon dioxide, pearl mica, mica, carbon black, red iron oxide, cerium oxide, manganese violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt titanate, ultramarine, Prussian blue, magnesium oxide, zirconium oxide, kaolin, sericite, muscovite, phlogopite, synthetic mica, red mica, biotite, and vermiculite.

[0059] Examples of organic dyes include 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 No. 404, Green No. 3, Green No. 201, Green No. 204, and Green No. 205.

[0060] Examples of organic pigment powders include tar pigments, nylon powder, cellulose powder, polyethylene powder, polymethyl methacrylate powder, polystyrene powder, acrylic powder, and silicone powder.

[0061] Furthermore, these pigment particles can be used individually or in combination.

[0062] From the viewpoint of using the composition of the present invention as a makeup cosmetic such as foundation, eyeshadow, eyebrow, and blush, titanium dioxide, yellow iron oxide, red iron oxide, black iron oxide, talc, zinc oxide, silicon dioxide, pearl mica, mica, and / or sericite can be used as pigment particles.

[0063] (Hydrophobic treated pigment particles (surface treatment agent)) The surface treatment agent for obtaining hydrophobic pigment particles may be a metal soap, silicone, fluorine compound, and / or amino acid, particularly a metal soap. Examples of metal soaps include salts of higher fatty acids with alkali metals such as sodium and potassium, and salts of higher fatty acids with divalent or trivalent metals (non-alkali metals) such as calcium, zinc, magnesium, and aluminum.

[0064] In the present invention, the higher fatty acid relating to the metal soap surface treatment agent may be a linear or branched saturated or unsaturated higher fatty acid having about 6 to 24 carbon atoms. Specifically, examples include lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, ricinoleic acid, and the like.

[0065] Furthermore, examples of metals that form salts with the above-mentioned higher fatty acids include alkali metals such as sodium and potassium, and divalent or trivalent non-alkali metals, such as calcium, magnesium, lithium, barium, and zinc.

[0066] In the present invention, examples of metal soap surface treatment agents include magnesium stearate, calcium stearate, zinc myristate, and aluminum dimyristate.

[0067] (Hydrophobic treated pigment particles (content)) In the composition of the present invention, the content of hydrophobic treated pigment particles may be 3.0% by mass or more, 5.0% by mass or more, 8.0% by mass or more, 10.0% by mass or more, 12.0% by mass or more, or 14.0% by mass or more, based on the total amount of the composition of the present invention, and may also be 30.0% by mass or less, 25.0% by mass or less, 20.0% by mass or less, or 15.0% by mass or less.

[0068] (Liquid oil) The oil phase contains liquid oil. In this invention, liquid oil refers to oil that is fluid at normal pressure (1 atm) and room temperature (25°C) and conforms to the shape of the container. As the liquid oil, any liquid oil acceptable in a cosmetic composition can be used, such as silicone oil, polar oil (e.g., fatty acid esters, fatty acids), hydrocarbon oil, etc.

[0069] Preferably, the oil phase contains a volatile silicone oil and a polar oil. This allows the volatile silicone oil to further improve the usability (especially the freshness) of the composition of the present invention, while the polar oil maintains the oil droplets, thereby promoting the effects of the composition of the present invention.

[0070] In the composition of the present invention, the liquid oil content may be 5.0% by mass or more, 10.0% by mass or more, 13.0% by mass or more, or 15.0% by mass or more, based on the total amount of the composition of the present invention, and may also be 40.0% by mass or less, 30.0% by mass or less, 25.0% by mass or less, 20.0% by mass or less, or 18.0% by mass or less.

[0071] (Liquid oil (silicone oil)) Examples of silicone oils usable in the compositions of the present invention include any silicone oil acceptable in cosmetic compositions, such as volatile silicone oils and non-volatile silicone oils, and in particular volatile silicone oils.

[0072] In the composition of the present invention, if silicone oil is included, its content may be 1.0% by mass or more, 3.0% by mass or more, 5.0% by mass or more, 8.0% by mass or more, or 9.0% by mass or more, relative to the total amount of the composition of the present invention, or it may be 30.0% by mass or less, 25.0% by mass or less, 20.0% by mass or less, 15.0% by mass or less, or 12.0% by mass or less.

[0073] In this invention, "volatile" refers to a substance whose volatile content exceeds 5% when left at atmospheric pressure and 105°C for 3 hours. In this invention, "non-volatile" refers to a substance whose volatile content is 5% or less when left at 105°C for 3 hours. Here, volatile content refers to the value of the weight change rate measured by gravimetric method after placing filter paper on a glass petri dish and dropping approximately 0.2g of the sample onto it.

[0074] In the composition of the present invention, the content of volatile silicone oil may be 50.0 parts by mass or more, 52.0 parts by mass or more, 55.0 parts by mass or more, 58.0 parts by mass or more, or 60.0 parts by mass or more, per 100 parts by mass of the total amount of liquid oil, or it may be 100.0 parts by mass or less, 95.0 parts by mass or less, 90.0 parts by mass or less, 85.0 parts by mass or less, 80.0 parts by mass or less, 75.0 parts by mass or less, or 70.0 parts by mass or less.

[0075] In the composition of the present invention, the usability (especially the freshness) of the composition can be further improved by having 50 parts by mass or more of the liquid oil component be volatile silicone oil.

[0076] In the present invention, examples of volatile silicone oils include volatile acyclic silicone oils (e.g., volatile linear silicone oils, volatile branched silicone oils, etc.) and volatile cyclic silicone oils.

[0077] Examples of volatile linear silicone oils include dimethicone (also called "dimethylpolysiloxane") with viscosities of 5.0 cSt or less, 4.0 cSt or less, 3.0 cSt or less, or 2.0 cSt or less. The lower limit of the viscosity of dimethicone may be 0.5 cSt or more, 0.6 cSt or more, or 1.0 cSt or more. Here, these viscosities are intended to be kinematic viscosities under a 25°C atmosphere.

[0078] Examples of volatile branched silicone oils include low molecular weight branched siloxanes such as methyl trimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane.

[0079] Examples of volatile cyclic silicone oils include octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.

[0080] (Liquid oil (polar oil)) Examples of polar oils usable in the compositions of the present invention include any polar oil acceptable in cosmetic compositions. In the present invention, a polar oil refers to an oil with high polarity that is commonly used in cosmetics, for example, an oil with an IOB value of 0.01 or higher, 0.10 or higher, 0.15 or higher, or 0.20 or higher. Examples of polar oils include fatty acid esters and fatty acids.

[0081] In the composition of the present invention, if a polar oil is included, its content may be 1.0% by mass or more, 2.0% by mass or more, 3.0% by mass or more, 4.0% by mass or more, or 5.0% by mass or more, relative to the total amount of the composition of the present invention, and may also be 20.0% by mass or less, 15.0% by mass or less, 10.0% by mass or less, or 8.0% by mass or less.

[0082] The polar oil may contain an ultraviolet absorber. From the viewpoint of imparting an ultraviolet protection effect to the composition of the present invention, it is preferable that the polar oil contains an ultraviolet absorber.

[0083] In the present invention, examples of ultraviolet absorbers include benzoic acid derivatives, salicylic acid derivatives, cinnamic acid derivatives, dibenzoylmethane derivatives, β,β-diphenylacrylate derivatives, benzophenone derivatives, benzylidene camphor derivatives, triazine derivatives, phenylbenzotriazole derivatives, anthranil derivatives, imidazoline derivatives, benzalmalonate derivatives, and 4,4-diarylbutadiene derivatives. Some specific examples and trade names of these are described below.

[0084] Examples of benzoic acid derivatives include ethyl para-aminobenzoate (PABA), ethyl-dihydroxypropyl PABA, ethylhexyl-dimethyl PABA (e.g., "Escalol 507"; manufactured by ISP), glyceryl PABA, PEG-25-PABA (e.g., "Ubinal P25"; manufactured by BASF), alkyl benzoate (C12-15), and diethylaminohydroxybenzoyl hexyl benzoate (e.g., "Ubinal A Plus").

[0085] Examples of salicylic acid derivatives include homosalate ("Eusolex HMS"; manufactured by Rona / EM Industries), ethylhexyl salicylate (e.g., "NeoHeliopan OS"; manufactured by Herman & Raymer), dipropylene glycol salicylate (e.g., "Dipsal"; manufactured by Skell), and TEA salicylate (e.g., "NeoHeliopan TS"; manufactured by Herman & Raymer).

[0086] Examples of cinnamic acid derivatives include ethylhexyl methoxycinnamate (e.g., "Parsol MCX"; manufactured by Hoffmann-La Roche), isopropyl methoxycinnamate, isoamyl methoxycinnamate (e.g., "Neo-Heliopan E1000"; manufactured by Herman & Raymer), cinnoxate, DEA methoxycinnamate, diisopropyl methylcinnamate, glyceryl-ethylhexanoate-dimethoxycinnamate, and di-(2-ethylhexyl)-4'-methoxybenzalmalonate.

[0087] Examples of dibenzoylmethane derivatives include 4-tert-butyl-4'-methoxydibenzoylmethane (e.g., "Parsol 1789").

[0088] Examples of β,β-diphenyl acrylate derivatives include octocrylene (e.g., "Ubinal N539"; manufactured by BASF).

[0089] Examples of benzophenone derivatives include benzophenone-1 (e.g., "Ubinal 400"; manufactured by BASF), benzophenone-2 (e.g., "Ubinal D50"; manufactured by BASF), benzophenone-3 or oxybenzone (e.g., "Ubinal M40"; manufactured by BASF), benzophenone-4 (e.g., "Ubinal 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 Cyanamide Corporation), benzophenone-9 (e.g., "Ubinal DS-49"; manufactured by BASF), and benzophenone-12.

[0090] Examples of benzylidene camphor derivatives include 3-benzylidene camphor (e.g., "Mexoryl SD"; manufactured by Simex), 4-methylbenzylidene camphor, benzylidene camphor sulfonic acid (e.g., "Mexoryl SL"; manufactured by Simex), benzalkonium camphor methosulfate (e.g., "Mexoryl SO"; manufactured by Simex), terephthalylidene disodium camphor sulfonic acid (e.g., "Mexoryl SX"; manufactured by Simex), and polyacrylamide methylbenzylidene camphor (e.g., "Mexoryl SW"; manufactured by Simex).

[0091] Examples of triazine derivatives include anisotriazine (e.g., "Tinosorb S"; manufactured by Ciba Specialty Chemicals), ethylhexyltriazone (e.g., "Uvinal T150"; manufactured by BASF), diethylhexylbutamidetriazone (e.g., "Uvasorb HEB"; manufactured by Sigma 3V), bisethylhexyloxyphenol methoxyphenyl triazine, and 2,4,6-tris(diisobutyl-4'-aminobenzalmalonate)-s-triazine.

[0092] Examples of phenylbenzotriazole derivatives include drometrizole trisiloxane (e.g., "Silatrizole"; manufactured by Rhodia Simiy) and methylenebis(benzotriazolyltetramethylbutylphenol) (e.g., "Tinosorb M" (manufactured by Ciba Specialty Chemicals)).

[0093] Examples of anthranil derivatives include menthyl anthranilate (e.g., "Neo-Heliopan MA"; manufactured by Herman & Raymer).

[0094] Examples of imidazoline derivatives include ethylhexyldimethoxybenzylidenedioxoimidazoline propionate.

[0095] Examples of benzalmalonate derivatives include polyorganosiloxanes having a benzalmalonate functional group (e.g., polysilicone-15; "Parsol SLX"; manufactured by DSM Nutrition Japan).

[0096] Examples of 4,4-diarylbutadiene derivatives include 1,1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene.

[0097] Polar oils may include ester oils.

[0098] As ester oils, any ester oil acceptable in cosmetic compositions, for example, pentaerythrityl tetraethylhexanoate, tripropylene glycol dieopentanoate, isononyl isononanoate, cetyl octanoate, hexyldecyl decyldimethyloctanoate oleate, cetyl lactate, myristyl lactate, cetyl ethylhexanoate, ethylene glycol di-2-ethylhexanoate, diisostearyl malate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, triethylhexanoin, triocta Examples include glycerin triisopalmitate, glycerin triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, castor oil fatty acid methyl ester, acetoglyceride, diisobutyl adipate, di-2-heptyl undecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, and triethyl citrate.

[0099] Polar oils may contain fatty acids.

[0100] Examples of fatty acids include any fatty acid acceptable in cosmetic compositions, such as stearic acid, lauric acid, myristic acid, behenic acid, isostearic acid, oleic acid, and especially isostearic acid.

[0101] (Liquid oil (hydrocarbon oil)) Examples of hydrocarbon oils usable in the compositions of the present invention include any hydrocarbon oil acceptable in cosmetic compositions. In the present invention, hydrocarbon oil refers to hydrocarbon oils other than the polar oils described above.

[0102] If the oil phase contains hydrocarbon oil, its content may be 1.0% by mass or more, 2.0% by mass or more, 3.0% by mass or more, 4.0% by mass or more, or 5.0% by mass or more, relative to the total amount of the composition of the present invention, or it may be 15.0% by mass or less, 10.0% by mass or less, or 5.0% by mass or less.

[0103] In the present invention, the hydrocarbon oil may be a volatile hydrocarbon oil or a non-volatile hydrocarbon oil.

[0104] Specific examples of hydrocarbon oils include, for example, decane, dodecane, isododecane, isohexadecane, liquid paraffin, squalane, squalene, paraffin, and mixtures of two or more of these.

[0105] (Other oil phase components) In the composition of the present invention, the oil phase component may optionally further contain other oil phase components in addition to the components described above, as long as they do not impair the effects of the present invention.

[0106] Other oil phase components include particles other than hydrophobized pigment particles (e.g., ultraviolet scattering agent particles, usable powders, etc.), solid ester oils, higher alcohols, oils and fats, and waxes.

[0107] <Manufacturing method> The composition of the present invention can be prepared by a dispersion method.

[0108] Here, the dispersion method is a method of finely dividing clumps of dispersed phase using mechanical force. Specifically, it is a method of emulsification that utilizes the crushing force of an emulsifier. Examples of such methods include high-pressure emulsification, which applies high shear force using a high-pressure homogenizer.

[0109] <Dosage Form> The composition of the present invention may be in the form of a liquid, emulsion, cream, gel, spray, mousse, etc. Here, "spray" can include mist-type sprays, aerosol-type sprays, etc.

[0110] <Application> The cosmetic composition of the present invention can be suitably used as a makeup cosmetic or as a raw material for the same.

[0111] Makeup products include foundation, BB cream, CC cream, blush (especially cream blush), concealer, eyeshadow (especially cream eyeshadow), and lipstick. [Examples]

[0112] The present invention will be further explained with reference to the following examples, but the present invention is not limited to these examples. Unless otherwise specified, the amounts of the ingredients are expressed in mass percent.

[0113] Based on the formulations in Tables 1 and 2, oil-in-water emulsion cosmetic compositions were prepared for Examples 1-3 and Comparative Examples 1-7.

[0114] Each prepared composition was evaluated as described below. The evaluation results are shown in Table 2.

[0115] <Possibility of emulsification> The emulsification status of each oil-in-water emulsion cosmetic was evaluated. More specifically, a small amount of each oil-in-water emulsion cosmetic sample was mixed with water, and the appearance of whether or not the pigment particles in the composition aggregated was observed and evaluated according to the following criteria. A: There were no abnormalities in appearance (i.e., emulsification was successful). B: There was an abnormality in the appearance (such as aggregation) (i.e., it could not be emulsified).

[0116] <High-temperature, long-term emulsification stability> Each oil-in-water emulsion cosmetic was stored at 50°C for 4 weeks. After storage, a small sample of each composition was mixed with water, and the appearance of whether or not the pigment particles in each oil-in-water emulsion cosmetic had aggregated was observed and evaluated according to the following criteria. A: It had a familiar appearance (i.e., the emulsification was stable). B: Partial aggregation was observed. C: Significant aggregation was observed.

[0117] <Refreshing usability> Each prepared oil-in-water emulsion cosmetic was used by 10 expert panelists, and its freshness during application was evaluated according to the following criteria. A: More than nine people rated it as having a fresh, vibrant quality. B: 6 to 8 people rated it as having a fresh, vibrant quality. C: Five or fewer people rated it as having a fresh, vibrant quality.

[0118] <Matte feel> Each prepared oil-in-water emulsion cosmetic was used by 10 expert panelists, and the matte finish was evaluated according to the following criteria. A: More than nine people rated it as having a matte finish. B: 6 to 8 people rated it as having a matte finish. C: Five or fewer people rated it as having a matte finish.

[0119] <Makeup longevity> Each prepared oil-in-water emulsion cosmetic was used by 10 expert panelists, and the longevity of the finished makeup was evaluated according to the following criteria. A: More than nine people rated it as having good staying power. B: 6 to 8 people rated the product as having good staying power. C: Five or fewer people rated the product as having good staying power.

[0120] [Table 1]

[0121] [Table 2]

[0122] As is clear from Tables 1 and 2 above, the cosmetic compositions of Examples 1 to 3 showed good results in all evaluations, including "emulsification status," "high-temperature stability over time," "fresh usability," "matte usability," and "makeup longevity."

[0123] In contrast, Comparative Examples 1 and 2, which used silica particles instead of barium sulfate particles as the aqueous phase powder, showed inferior evaluation results for "high-temperature stability over time." Furthermore, Comparative Examples 3 to 6, which used mica particles or boron nitride particles instead of barium sulfate particles as the aqueous phase powder, showed inferior evaluation results for "matte usability." In addition, Comparative Example 7, which used an untreated colorant instead of a hydrophobic treated colorant as the oil phase colorant, showed inferior evaluation results for "high-temperature stability over time," "fresh usability," and "matte usability." [Explanation of Symbols]

[0124] 10 aqueous phase 12 Barium sulfate particles 20 Oil phase 22 Hydrophobized pigment particles 30 skin 15 Lower layer mainly composed of barium sulfate particles 10 25 Upper layer mainly composed of hydrophobic treated pigment particles 20

Claims

1. An oil-in-water emulsion cosmetic composition having an aqueous phase and an oil phase dispersed in the aqueous phase, Barium sulfate particles are dispersed in the aqueous phase. Hydrophobized pigment particles are dispersed in the oil phase, and The content of the barium sulfate particles is greater than 1.0% by mass. Oil-in-water emulsion cosmetic composition.

2. The composition according to claim 1, wherein the content of the barium sulfate particles is 2.0% by mass or more.

3. The composition according to claim 1, wherein the aqueous phase contains a water-soluble polymer.

4. The composition according to claim 3, wherein the water-soluble polymer is hydrolyzed starch.

5. The composition according to claim 1, wherein the aqueous phase contains ethanol.

6. The composition according to claim 1, wherein the aqueous phase contains a water-soluble active ingredient.

7. The composition according to claim 1, wherein the content of the hydrophobic treated pigment particles is 1.0 to 20.0% by mass.

8. The composition according to claim 1, wherein the oil phase contains a volatile silicone oil and a polar oil.

9. A makeup cosmetic composition according to any one of claims 1 to 8.

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