Oil-in-water cosmetic

Abstract

To provide an oil-in-water cosmetic that enables simultaneous improvement of ultraviolet protection effect, usability, and finish.SOLUTION: An oil-in-water cosmetic comprising (A) a polar oil, (B) silica, (C) a hydrophobically treated colorant, (D) a urethane-based water-soluble film-forming agent, and (E) water.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an oil-in-water cosmetic composition containing powder, suitable for use as a foundation or the like. [Background technology]

[0002] Water-in-oil emulsion cosmetics, which have an oily external phase and are often used in liquid foundations, tend to lack a fresh feeling when applied and have inferior moisturizing effects and a feeling of moisture.

[0003] On the other hand, oil-in-water cosmetics provide a fresh feel and have excellent moisturizing effects, and attempts have been made to thicken or solidify oil-in-water compositions to produce semi-solid or solid cosmetics suitable for foundations and the like.

[0004] On the other hand, there is a trend in the market for foundations with strong skin care effects. To meet this need, cosmetics that incorporate polar oils with UV absorbing properties into oil-in-water cosmetics are being investigated. Such cosmetics can achieve excellent usability and a beautiful finish, and also provide UV protection effects.

[0005] However, it has been difficult to simultaneously improve these various performances. Specifically, when an attempt is made to improve UV protection by increasing the amount of polar oil, the makeup lasting time, which is important for foundations, can be insufficient. Generally, it is known that adding a film-forming agent can improve makeup lasting time, but adding a film-forming agent can sometimes impair the freshness of the makeup when used and reduce the gloss after application. For this reason, there has been a demand for oil-in-water cosmetics suitable for foundations and the like, which have improved UV protection effects as well as improved usability and finish. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] International Publication No. 2015 / 098675 Summary of the Invention

[0007] In view of the above problems, the present invention aims to provide an oil-in-water cosmetic composition that has an excellent ultraviolet protection effect, and also has excellent usability and finish.

[0008] According to the present invention, the following inventions are provided. [1] (A) polar oil, (B) silica, (C) Hydrophobized colorant, (D) a urethane-based water-soluble coating agent, and (E) Water; An oil-in-water cosmetic comprising: [2] The oil-in-water cosmetic according to [1], wherein the content of component (A) is 8 to 30 mass % based on the total mass of the oil-in-water cosmetic. [3] The oil-in-water cosmetic according to [1] or [2], wherein the component (A) comprises an ultraviolet absorber (a1), and the content of the component (a1) relative to the total mass of the oil-in-water cosmetic is 8 to 25 mass%. [4] The oil-in-water cosmetic according to any one of [1] to [3], wherein the surface of component (B) is hydrophilic. [5] The oil-in-water cosmetic according to any one of [1] to [4], wherein the average particle size of component (B) is 1 to 7 μm. [6] The oil-in-water cosmetic according to any one of [1] to [5], wherein component (C) is a color pigment that has been subjected to a treatment selected from the group consisting of silicone treatment, fluorine treatment, fatty acid treatment, ester treatment, metal soap treatment, and N-acylamino acid treatment, and combinations thereof. [7] The oil-in-water cosmetic according to any one of [1] to [6], wherein component (D) is selected from the group consisting of polyurethane-10, polyurethane-24, polyurethane-35, and (polyurethane-24 / methyl methacrylate) crosspolymer. [8] The oil-in-water cosmetic according to any one of [1] to [7], wherein the content of component (B) based on the total mass of the oil-in-water cosmetic is 0.1 to 3 mass %. [9] The oil-in-water cosmetic according to any one of [1] to [8], wherein the content of component (C) based on the total mass of the oil-in-water cosmetic is 5 to 25 mass %.

[10] The oil-in-water cosmetic according to any one of [1] to [9], wherein the content of component (D) based on the total mass of the oil-in-water cosmetic is 0.01 to 0.5 mass %.

[11] (F) The oil-in-water cosmetic according to any one of [1] to

[10] , further comprising a water-soluble thickener.

[12] The oil-in-water cosmetic preparation according to any one of [1] to

[11] , which has a viscosity of 20,000 mPa·s or less at 30°C as measured using a Brookfield viscometer.

[0009] According to the present invention, an oil-in-water cosmetic composition is provided which has an excellent UV protection effect, as well as excellent usability and finish. More specifically, the cosmetic composition exhibits excellent properties, such as a high UVB protection effect, a fresh feeling upon application, excellent makeup wear, and a glossy finish that lasts for a long time.

[0010] The oil-in-water cosmetic composition according to the present invention (hereinafter simply referred to as "cosmetic composition") is (A) polar oil, (B) silica, (C) Hydrophobized colorant, (D) a urethane-based water-soluble coating agent, and (E) Water; Each of these components, as well as other components that may be added, will be described below.

[0011] (A) Polar oil The polar oil (hereinafter sometimes referred to as component (A)) can be selected as needed from those commonly used in cosmetics. Specifically, (a1) Liquid ultraviolet absorbers such as octocrylene, 2-ethylhexyl 4-methoxycinnamate, homosalate, 2-ethylhexyl salicylate, hexyl diethylaminohydroxybenzoate, t-butylmethoxydibenzoylmethane, ethylhexyl triazone, and bisethylhexyloxyphenol methoxyphenyl triazine; (a2) Ester oils such as diisopropyl sebacate, pentaerythrityl tetraethylhexanoate, cetyl ethylhexanoate, jojoba oil, di(phytosteryl / octyldodecyl) lauroyl glutamate, triisostearin, glyceryl diisostearate, triethylhexanoin, phytosteryl / behenyl dimer dilinoleate, phytosteryl / isostearyl / cetyl / stearyl / isostearyl / cetyl / stearyl / behenyl dimer dilinoleate, isopropyl palmitate, phytosteryl macadamia nut fatty acid, pentaerythrityl tetra(behenate / benzoate / ethylhexanoate), ethylhexyl palmitate, myristyl myristate, isopropyl myristate, tripropylene glycol dipivalate, and isodecyl neopentanoate. The cosmetic composition according to the present invention preferably contains (a1) a liquid ultraviolet absorber. In order to enhance the ultraviolet protection effect of the cosmetic composition according to the present invention, a powdery ultraviolet reflective material or the like can be used, but in the present invention, the liquid ultraviolet absorber (a1) can be blended in at a high content.

[0012] Component (A) is not limited to these, and any polar oil can be combined as needed within a range that does not impair the effects of the present invention.

[0013] In the cosmetic preparation according to the present invention, the content of component (A) can be adjusted depending on the purpose. However, the content of component (A) relative to the total mass of the cosmetic preparation is preferably 8 to 30 mass%, more preferably 10 to 25 mass%. By appropriately adjusting the content of component (A), it is possible to achieve both UV protection effect and ease of use.

[0014] In order to obtain a high UV protection effect in the cosmetic according to the present invention, the component (A) contains the UV absorber (a1), and the content of the component (a1) is preferably 8 to 25 mass %, more preferably 10 to 20 mass %, relative to the total mass of the cosmetic.

[0015] Generally, increasing the content of an ultraviolet absorber tends to reduce the long-lasting effect of makeup and cause stickiness during use. However, according to the present invention, even when the content of component (a1) is high, sufficient long-lasting effect of makeup can be achieved and stickiness is reduced.

[0016] (B) Silica The cosmetic preparation according to the present invention comprises silica (hereinafter sometimes referred to as component (B)). Various types of silica are known, and any type can be used depending on the purpose. For example, known silica types include porous silica, nonporous silica, and hollow nonporous silica, and any of these can be used. Furthermore, it is preferable that the surface of the silica is hydrophilic. Various types of surface-treated silica are known, but hydrophobically treated silica may not fully exhibit the effects of the present invention. For this reason, it is preferable to use untreated silica or silica whose surface has been hydrophilically treated.

[0017] The particle size of component (B) can be selected arbitrarily depending on the purpose, but an average particle size of 1 to 7 μm is preferred, and an average particle size of 1 to 5 μm is more preferred. The average particle size of silica can be measured according to a laser diffraction method. As component (B) in the present invention, commercially available products such as Sunsphere L-51S (manufactured by AGC Si-Tech Co., Ltd.) and Godball E-6C (manufactured by Suzuki Yushi Kogyo Co., Ltd.) can be used.

[0018] In the cosmetic according to the present invention, the content of component (B) can be adjusted depending on the purpose, but the content of component (B) based on the total mass of the cosmetic is preferably 0.1 to 3 mass%, and more preferably 0.5 to 2 mass%.

[0019] (C) Hydrophobic treated colorant The cosmetic of the present invention comprises a hydrophobized color material (hereinafter, sometimes referred to as component (C)). Component (C) is a color pigment that has been hydrophobized.

[0020] The color pigment can be selected from those that can be generally used in cosmetics. For example, Metal oxides such as titanium oxide, iron oxide (yellow iron oxide, black iron oxide, and red iron oxide), zinc oxide, zinc oxide, cerium oxide, aluminum oxide, chromium oxide, chromium hydroxide, metal complexes such as manganese violet and green spinel (cobalt titanate), as well as inorganic pigments such as carbon black; Organic pigments such as tar-based pigments and lake pigments; and Natural dyes such as carmine Examples include:

[0021] The color pigment to be used can be selected depending on the purpose, but it is preferable to use an inorganic pigment that has a high effect of covering the skin as a cosmetic, and it is more preferable to use titanium oxide, iron oxide, or zinc oxide. Two or more of these color pigments can also be used in combination.

[0022] As such color pigments, those with various particle sizes are known. The particle size of the color pigment can be selected depending on the purpose, but a primary particle size of 0.1 μm or more is preferred, and a primary particle size of 0.2 μm or more is more preferred. In addition, fine particle color pigments with a small primary particle size can also be used depending on the purpose.

[0023] In the cosmetic of the present invention, the color pigment used is one that has been hydrophobized. By subjecting the color pigment to hydrophobization treatment, it is possible to reduce the rough feeling that may occur when using the cosmetic, improving usability and improving the cosmetic's long-lasting effect after use. Such hydrophobization treatments can be selected from silicone treatments, fluorine treatments, fatty acid treatments, ester treatments, metal soap treatments, N-acyl amino acid treatments, etc. Of these, silicone treatments, ester treatments, metal soap treatments, and N-acyl amino acid treatments are preferred because they provide a sticky feel and glossy feel during use, as well as a strong covering effect.

[0024] Specific examples of silicone treatments include methylhydrogenpolysiloxane treatment, dimethylpolysiloxane treatment, and alkylalkoxysilane treatment. Examples of alkylalkoxysilanes used in alkylalkoxysilane treatments include hexyltrimethoxysilane, hexyltriethoxysilane, caprylyltrimethoxysilane, and caprylyltriethoxysilane.

[0025] Specific examples of the fluorine treatment include a perfluoroalkyl phosphate treatment and a perfluoroalkylalkoxysilane treatment. Examples of fatty acid treatments include stearic acid treatment and myristic acid treatment, and examples of N-acyl amino acid treatments include lauroyl lysine treatment, sodium dilauroyl glutamate lysine treatment, disodium stearoyl glutamate treatment, sodium lauroyl aspartate treatment, and the like.

[0026] The ester treatment involves treating the color pigment with an ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin, and specific examples include treatments of the color pigment with esters such as diglyceryl tetraisostearate, diglyceryl triisostearate, tri(caprylic / capric)glyceryl, glyceryl dilaurate, glyceryl triisostearate, decaglyceryl monoisostearate, and decaglyceryl diisostearate.

[0027] Examples of metal soap treatments include treatments with salts of carboxyl group-containing compounds such as fatty acids and divalent or higher metals, such as aluminum stearate, magnesium stearate, and magnesium isostearate.

[0028] The N-acylamino acid or salt thereof used in the N-acylamino acid treatment includes a compound in which an acyl group, preferably a saturated fatty acid having 12 to 20 carbon atoms, is condensed with the amino group of the amino acid, or a salt thereof. The amino acid is preferably glutamic acid or aspartic acid. Examples of the N-acyl group include a stearoyl group and a lauroyl group. The salt can be selected from alkali metal salts such as sodium and potassium, and alkaline earth metal salts, with sodium salts being preferred. Specific examples include disodium N-stearoyl glutamate, sodium N-lauroyl glutamate, sodium lauroyl aspartate, and sodium dilauroyl glutamate lysine.

[0029] In the cosmetic according to the present invention, the blending amount of component (C) is preferably 5 to 25 mass %, more preferably 7 to 15 mass %, relative to the total mass of the cosmetic.

[0030] In the cosmetic according to the present invention, it is preferable that component (C) is blended into the oil phase of the oil-in-water cosmetic. By subjecting component (C) blended into the oil phase to hydrophobic treatment, the affinity of component (C) for the oil phase is improved. In addition, in the cosmetic according to the present invention, the hydrophobic treated coloring material may be dispersed in the oil phase by blending a dispersant, if necessary.

[0031] (D) Urethane-based water-soluble coating agent The cosmetic preparation according to the present invention comprises a urethane-based water-soluble coating agent (hereinafter sometimes referred to as component (D)). Various water-soluble coating agents are known that can be incorporated into cosmetics, and in addition to urethane-based water-soluble coating agents, polyacrylic acid-based water-soluble coating agents, polyvinyl-based water-soluble coating agents, starch-based skin-based water-soluble coating agents, and fine cellulose fibers are also known. However, the excellent effects of the present invention are only exhibited when a urethane-based water-soluble coating agent is used, and it is particularly capable of imparting a fresh feeling upon use.

[0032] Specific examples of the component (D) include polyurethane-10, polyurethane-24, polyurethane-35, and (polyurethane-24 / methyl methacrylate) crosspolymer.

[0033] In the cosmetic according to the present invention, the content of component (D) based on the total mass of the cosmetic is preferably 0.01 to 0.5 mass %, and more preferably 0.03 to 0.3 mass %.

[0034] (E)Water The oil-in-water cosmetic preparation according to the present invention comprises an aqueous phase and an oil phase. The aqueous phase contains water (hereinafter sometimes referred to as component (E)). The water may be any water commonly used in cosmetics, such as purified water, ion-exchanged water, or tap water.

[0035] (F) Water-soluble thickener In addition to the above-mentioned components, the cosmetic preparation according to the present invention may contain a water-soluble thickener (hereinafter, sometimes referred to as component (F)). By incorporating component (F), the dispersion stability of the cosmetic preparation can be further improved.

[0036] Examples of component (F) include acrylic polymers, cellulose polymers, vinyl polymers, polyoxyethylene polymers, alginic acid polymers, plant-based polymers, animal-based polymers, and inorganic water-soluble polymers.

[0037] Among these components (F), acrylic polymers are preferred. Component (F) suitable for use in the cosmetic composition of the present invention includes: (Dimethylacrylamide / Sodium Acryloyldimethyltaurate) Crosspolymer, Ammonium acryloyldimethyltaurate / beheneth-25 methacrylate crosspolymer Acrylates / C10-30 alkyl acrylate crosspolymer, (Acryloyldimethyltaurate ammonium / VP) copolymer, Alkanolamine polyacrylate, Copolymer of alkyl methacrylate and dimethylaminoethyl methacrylate, Poly 2-acrylamido-2-methylpropanesulfonic acid, Polymethacryloyloxytrimethylammonium, etc.

[0038] In the cosmetic according to the present invention, the content of component (F) based on the total mass of the cosmetic is preferably 0.1 to 2 mass %, more preferably 0.2 to 1 mass %.

[0039] In addition to the above-mentioned components, the cosmetic composition of the present invention can contain optional components that are commonly used in cosmetics. The optional components include the following, and one or more of them can be contained as long as the effects of the present invention are achieved.

[0040] (a) Non-polar oils, such as hydrocarbon oils, silicone oils, etc. (b) surfactants, such as anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants, etc. (c) moisturizers, such as glycerin and butylene glycol; (d) lower alcohols, such as ethanol, propanol, isopropanol, isobutyl alcohol, t-butyl alcohol, etc. (e) Sequestering agents, for example, 1-hydroxyethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid tetrasodium salt, edetate disodium, edetate trisodium, edetate tetrasodium, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetic acid, ethylenediaminehydroxyethyltriacetate trisodium, etc. (f) Neutralizing agents, such as 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, potassium hydroxide, sodium hydroxide, triethanolamine, sodium carbonate, etc. (g) pH adjusters, for example, buffers such as lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate; (h) antioxidants, such as tocopherols, dibutylhydroxytoluene, butylhydroxyanisole, gallic acid esters, etc. (i) preservatives, such as phenoxyethanol, ethylparaben, butylparaben, etc. (j) Drugs, such as caffeine, tannins, verapamil and its derivatives, tranexamic acid and its derivatives, licorice extract, glabridin, hot water extract of fire thorn fruit, various herbal medicines, tocopherol acetate, glycyrrhizic acid and its derivatives or salts thereof, etc. (k) Skin whitening agents, for example, alkoxysalicylic acids or salts thereof such as potassium 4-methoxysalicylate, vitamin C, magnesium ascorbyl phosphate, ascorbyl glucoside, and other skin whitening agents.

[0041] The cosmetic composition according to the present invention is an oil-in-water cosmetic composition, and generally has a liquid formulation. The viscosity of this cosmetic composition at 30°C, measured using a Brookfield viscometer, is preferably 20,000 mPa s or less, and more preferably 10,000 mPa s or less.

[0042] The cosmetic according to the present invention can be, for example, a makeup cosmetic (e.g., foundation, makeup base, etc.), a skin care cosmetic (e.g., lotion, emulsion, cream, serum, pack, etc.), a sunscreen cosmetic, an ointment, etc.

[0043] The cosmetic of the present invention can be produced by any conventionally known method. The emulsification method for producing an oil-in-water cosmetic is not particularly limited, and the cosmetic can be produced according to a conventional method. [Example]

[0044] The present invention will be described in detail based on the following examples, but the present invention is not limited to these examples. Unless otherwise specified, the contents are expressed in mass % relative to the total amount.

[0045] [Examples 1 to 4, Comparative Examples 1 to 4] Cosmetics of each example and comparative example were prepared according to the formulations shown in Table 1.

[0046] Furthermore, the performance of these cosmetics was evaluated as follows.

[0047] [Emulsification possible] A small amount of the prepared cosmetic was mixed with water, and the presence or absence of aggregation was visually observed and evaluated according to the following criteria. Pass: No aggregation was observed and emulsification was achieved. Unacceptable: Aggregation was observed and emulsification was not possible. In addition, in Comparative Example 4, a uniform cosmetic preparation could not be prepared, and therefore properties other than whether or not it could be emulsified could not be evaluated.

[0048] [Usability (freshness)] The prepared cosmetics were applied to the skin by a panel of five experts and evaluated according to the following criteria. A: 5 people answered that it was fresh. B: 3-4 people answered that it was fresh. C: 1-2 people answered that it was fresh. D: No one answered that it was fresh.

[0049] [Usability (gloss)] The prepared cosmetics were applied to the skin by a panel of five experts, and the state of luster immediately after application was evaluated according to the following criteria. A: 5 people answered that it was shiny. B: 3-4 people answered that it was shiny. C: 1-2 people answered that it was shiny. D: No one answered that it was shiny.

[0050] [Usability (cosmetic wear)] The prepared cosmetics were applied in an amount of 5 mg to 4 cm of artificial leather. 2 The cosmetic was applied to the area and left to stand at 37°C for 5 minutes. The artificial leather was then tapped twice onto the filter paper using a tapping tester to transfer the cosmetic. The level of transfer of each cosmetic to the filter paper was visually observed and evaluated according to the following criteria. A: No transfer to the filter paper was observed. B: Almost no transfer to the filter paper was observed. C: Transfer to the filter paper was confirmed, but the transfer was faint. D: Transfer to the filter paper was confirmed and the transfer was thick.

[0051] [Usability (gloss over time)] The prepared cosmetics were applied to the skin of five expert panelists, and the state of gloss after 4 hours was evaluated according to the following criteria. A: 5 people answered that it was shiny. B: 3-4 people answered that it was shiny. C: 1-2 people answered that it was shiny. D: No one answered that it was shiny.

[0052] [viscosity] The viscosity of the prepared cosmetic was measured at 30°C using a B-type viscometer. Rotor No. 3 was used for the measurement, and the rotor rotation speed was set to 12 rpm.

[0053] [Table 1]

Claims

1. (A) polar oil, (B) silica, (C) a hydrophobized colorant, (D) a urethane-based water-soluble coating agent, and (E) Water; An oil-in-water cosmetic comprising:

2. 2. The oil-in-water cosmetic according to claim 1, wherein the content of component (A) is 8 to 30% by mass based on the total mass of the oil-in-water cosmetic.

3. 3. The oil-in-water cosmetic according to claim 1, wherein the component (A) comprises an ultraviolet absorber (a1), and the content of the component (a1) relative to the total mass of the oil-in-water cosmetic is 8 to 25 mass%.

4. 3. The oil-in-water cosmetic according to claim 1, wherein the surface of component (B) is hydrophilic.

5. 3. The oil-in-water cosmetic according to claim 1, wherein the average particle size of component (B) is 1 to 7 μm.

6. 3. The oil-in-water cosmetic according to claim 1, wherein component (C) is a color pigment that has been subjected to a treatment selected from the group consisting of silicone treatment, fluorine treatment, fatty acid treatment, ester treatment, metal soap treatment, and N-acylamino acid treatment, and combinations thereof.

7. 3. The oil-in-water cosmetic according to claim 1, wherein component (D) is selected from the group consisting of polyurethane-10, polyurethane-24, polyurethane-35, and (polyurethane-24 / methyl methacrylate) crosspolymer.

8. 3. The oil-in-water cosmetic according to claim 1, wherein the content of component (B) is 0.1 to 3% by mass based on the total mass of the oil-in-water cosmetic.

9. 3. The oil-in-water cosmetic according to claim 1, wherein the content of component (C) is 5 to 25% by mass based on the total mass of the oil-in-water cosmetic.

10. 3. The oil-in-water cosmetic according to claim 1, wherein the content of component (D) is 0.01 to 0.5% by mass based on the total mass of the oil-in-water cosmetic.

11. The oil-in-water cosmetic according to claim 1 or 2, further comprising (F) a water-soluble thickener.

12. 3. The oil-in-water cosmetic preparation according to claim 1, which has a viscosity at 30°C measured using a Brookfield viscometer of 20,000 mPa·s or less.

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