Oil-in-water cosmetic

Abstract

The present invention provides an oil-in-water cosmetic having excellent usability and hardly secondarily adhering to clothes or the like after being applied to the skin. The oil-in-water cosmetic according to the present invention contains (A) agar, (B) mica having a hydrophilic surface, (C) a non-silicone treated coloring material, (D) silica, (E) water, and (F) oil. The cosmetic contains 0.01-1.3 mass% of component (A) based on mass.

Description

Oil-in-water cosmetics

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

[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] However, although oil-in-water cosmetics offer a smoother and more moisturizing feel than water-in-oil cosmetics, they tend to be prone to secondary adhesion, such as adhesion to clothing after application to the skin. Furthermore, oil-in-water cosmetics tend to experience syneresis over time.

[0005] For this reason, there has been a demand for oil-in-water cosmetics that are easy to use, have reduced secondary adhesion, and are suitable for foundations and the like.

[0006] International Patent Publication No. 2019 / 088056

[0007] In view of the above-mentioned problems, the present invention aims to provide a semi-solid or solid cosmetic preparation that is easy to use and inhibits secondary adhesion.

[0008] The present invention provides the following inventions. [1] An oil-in-water cosmetic comprising (A) agar, (B) mica having a hydrophilic surface, (C) a non-silicone-treated coloring material, (D) silica, (E) water, and (F) an oil, wherein the content of component (A) is 0.01 to 1.3 mass% based on the total mass of the cosmetic. [2] The cosmetic according to [1], further comprising a thickening polysaccharide selected from the group consisting of succinoglucan and carboxymethylcellulose. [3] The cosmetic according to [1] or [2], wherein component (C) is a color pigment that has been treated with a metal soap, an amino acid-based treatment, or a fatty acid polyglyceryl ester treatment. [4] The cosmetic according to any one of [1] to [3], wherein the total content of agar, succinoglucan, and carboxymethylcellulose is 1.3 mass% or less based on the total mass of the cosmetic. [5] The cosmetic preparation according to any one of [1] to [4], wherein the content of component (B) based on the total mass of the cosmetic preparation is 0.1 to 5 mass%. [6] The cosmetic preparation according to any one of [1] to [5], wherein the content of component (C) based on the total mass of the cosmetic preparation is 0.1 to 20 mass%. [7] The cosmetic preparation according to any one of [1] to [6], wherein the oil absorption of component (D) is 70 mL / 100 g or more. [8] The cosmetic preparation according to any one of [1] to [7], further comprising (G) a nonionic surfactant. [9] The cosmetic preparation according to any one of [1] to [8], further comprising (H) a moisturizing agent.

[0009] According to the present invention, there is provided an oil-in-water cosmetic composition that is excellent in usability and, after application to the skin, is resistant to secondary adhesion to clothing, etc. This cosmetic composition has excellent stability over time, and further has the characteristics of providing a good finish when applied to the skin and being less likely to be ruined by sweat or sebum. Specific Description of the Invention

[0010] The oil-in-water cosmetic composition according to the present invention (hereinafter sometimes simply referred to as "cosmetic composition") comprises: (A) agar, (B) mica having a hydrophilic surface, (C) a non-silicone-treated coloring material, (D) silica, (E) water, and (F) oil. Each of these components, as well as other components that can be further blended, will be described below.

[0011] (A) Agar The cosmetic preparation according to the present invention comprises agar (hereinafter, sometimes referred to as component (A)). Component (A) is a type of polysaccharide that is commonly used in cosmetics as a hydrophilic thickener. Component (A) has sol-gel transition ability, and after being dissolved by heating, solidifies upon cooling to form a gel, and is characterized by being less susceptible to the influence of ions. Although polysaccharides other than agar are known to have sol-gel transition ability, it is necessary for the present invention to include agar.

[0012] Component (A) solidifies upon cooling, and the gel point (freezing point) of its aqueous solution is preferably 30°C or higher from the viewpoint of solidification at room temperature, and preferably 50°C or lower, and more preferably 45°C or lower, from the viewpoint of solubility during production. Taking all of these points into consideration, the gel point of the aqueous solution of component (A) is preferably 30 to 50°C, more preferably 30 to 45°C. The gel point of the aqueous solution of component (A) can be determined by placing approximately 10 ml of the gelling solution in a medium-sized test tube (1.5 cm diameter x 16 cm), inserting a thermometer, and occasionally tilting the test tube to cool it; the temperature is determined as the temperature at which the surface becomes fixed and unmoving.

[0013] Component (A) has a basic structure containing a large amount of galactose as a monosaccharide unit, and contains neutral agarose and agaropectin having ionic groups, with sulfate groups contained in part of the agaropectin.

[0014] In the present invention, component (A) is not particularly limited as long as it is composed primarily of agarose with high gelling power. The agar may be a natural product or a commercially available product. Suitable commercially available agars include, for example, Ina Agar PS-84, Z-10, AX-30, AX-100, AX-200, T-1, S-5, and M-7 (manufactured by Ina Food Industry Co., Ltd.). Purified agar can also be used as the agar.

[0015] In the cosmetic according to the present invention, the content of component (A) can be adjusted depending on the purpose, but in order to achieve sufficient usability and the effect of inhibiting secondary adhesion, it is necessary for the content to be 0.1 to 1.3 mass % based on the total mass of the cosmetic, and preferably 0.5 to 1.2 mass %.

[0016] In addition to component (A), the cosmetic composition according to the present invention may further contain a thickening polysaccharide selected from the group consisting of succinoglucan and carboxymethylcellulose. The use of these additional thickening polysaccharides allows the effects of component (A) to be adjusted. However, the effects of the present invention cannot be achieved with these additional thickening polysaccharides alone, and excessively high content of the additional thickening polysaccharides may impair the effects of the present invention. For this reason, it is preferable that the total content of agar, succinoglucan, and carboxymethylcellulose is 1.3% by mass or less, based on the total mass of the cosmetic composition.

[0017] (B) Mica with a Hydrophilic Surface The cosmetic according to the present invention comprises mica with a hydrophilic surface (hereinafter, sometimes referred to as component (B)). The mica can be selected from those commonly used in cosmetics, but it is necessary that the surface is hydrophilic.

[0018] Known mica includes mica, sericite (sericite), muscovite, phlogopite, synthetic mica, lepidolite, biotite, lepidolite, and calcined mica, and any of these can be selected and used. In the present invention, component (B) must have a hydrophilic surface. However, since natural mica generally has a hydrophilic surface, untreated mica can be used as is. Furthermore, although the surface condition of synthetic mica can change depending on the synthesis method or treatment method, mica with a hydrophobic surface can also be used in the cosmetic composition of the present invention by subjecting the surface to a hydrophilic treatment. While it is preferable to use mica with a hydrophilic surface as is, it can also be subjected to further hydrophilic treatment for the purpose of attaching special substituents to the surface of the mica particles, or surface treatment to an extent that the surface hydrophilicity is sufficiently maintained.

[0019] In the present invention, by incorporating mica, which has a hydrophilic surface, makeup smearing caused by sweat, sebum, etc. when the cosmetic is applied to the skin is improved, and the finish after application appears natural, which is an unexpected effect. The content of component (B) can be selected as desired depending on the purpose, but to achieve these properties, it is preferably 0.1 to 5 mass %, and more preferably 0.5 to 5 mass %, based on the total mass of the cosmetic.

[0020] (C) Non-Silicone-Treated Colorant The cosmetic according to the present invention comprises a non-silicone-treated colorant (hereinafter, sometimes referred to as component (C)) as a colorant. Component (C) is a powdered colorant such as a pigment that has been treated with a non-silicone-based treatment agent. Various treatments using non-silicone-based treatment agents are known, including metal soap treatment, amino acid-based treatment, fatty acid polyglyceryl ester treatment, lecithin treatment, fatty acid treatment, inorganic compound treatment, and alkyl phosphate ester treatment, and any of these can be selected depending on the purpose. Of these, metal soap treatments such as aluminum stearate treatment and magnesium stearate treatment, amino acid-based treatments using N-acylglutamic acid, and fatty acid polyglyceryl ester treatments using polyglyceryl-2 tetraisostearate are preferred.

[0021] In the cosmetic according to the present invention, the content of component (C) can be adjusted depending on the purpose, but the content of component (C) based on the total mass of the cosmetic is preferably 0.1 to 20 mass%, and more preferably 1 to 10 mass%.

[0022] (D) Silica The cosmetic preparation according to the present invention contains silica (hereinafter, sometimes referred to as component (D)). In the present invention, component (D) exhibits the effect of preventing secondary adhesion and also has the effect of improving stability over time.

[0023] Various types of silica are known, and any type can be used depending on the purpose. For example, porous silica, non-porous silica, hollow non-porous silica, etc. are known as silica, and any of them can be used. In addition, silica that has undergone various surface treatments is known, and hydrophobic silica is preferred.

[0024] The oil absorption of component (D) is not particularly limited, but for example, the oil absorption measured using squalane is preferably 70 mL / 100 g or more, and more preferably 100 mL / 100 g or more.

[0025] The particle size of component (D) can also be selected arbitrarily depending on the purpose, but an average particle size of 20 μm or less is preferred, and 5 to 10 μm is even more preferred.

[0026] In the cosmetic according to the present invention, the content of component (D) can be adjusted depending on the purpose, but the content of component (D) based on the total mass of the cosmetic is preferably 1 to 15 mass%, and more preferably 2 to 10 mass%.

[0027] (E) Water The oil-in-water cosmetic 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)). As the water, water generally used in cosmetics can be used, such as purified water, ion-exchanged water, tap water, etc.

[0028] (F) Oil The oil-in-water cosmetic according to the present invention comprises an oil (hereinafter, sometimes referred to as component (F)) that constitutes the oil phase.

[0029] Component (F) can be broadly divided into polar oils and non-polar oils, either of which can be used in the present invention.

[0030] Examples of polar oils include ester oils, higher fatty acids, and higher aliphatic alcohols.

[0031] Examples of ester oils include octyl octanoate, nonyl nonanoate, cetyl octanoate, isopropyl myristate, octyldodecyl myristate, isopropyl palmitate, ethylhexyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, cetyl 2 -ethylhexanoate-2-ethylhexyl palmitate, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, di(phytosteryl / octyldodecyl) lauroyl glutamate, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, triethyl citrate, cetyl ethylhexanoate, macadamia nut fatty acid phytosteryl, tocopheryl acetate, and the like.

[0032] Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tall acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).

[0033] Examples of higher alcohols include straight-chain alcohols (e.g., lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol, etc.), branched-chain alcohols (e.g., lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, octyldodecanol, etc.), and the like.

[0034] Examples of non-polar oils include hydrocarbon oils and silicone oils.

[0035] Examples of hydrocarbon oils include paraffin, squalane, squalene, isohexadecane, isododecane, hydrogenated polydecene, hydrogenated isopolybutene, and petrolatum.

[0036] Examples of silicone oils include chain silicone oils such as dimethicone, methylphenylpolysiloxane, caprylyl methicone, diphenylsiloxyphenyltrimethicone, methylhydrogenpolysiloxane, and trimethylsiloxysilicate, and cyclic silicone oils such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.

[0037] The component (B) used in the present invention may be either a polar oil or a non-polar oil, or a mixture thereof. The polar oil is preferably an ester oil, and the non-polar oil is preferably a hydrocarbon oil.

[0038] In the present invention, the content of component (F) is preferably 5 to 40% by mass based on the total mass of the cosmetic.

[0039] (G) Nonionic Surfactant In addition to the above-mentioned components, the cosmetic composition according to the present invention may contain a nonionic surfactant (hereinafter, sometimes referred to as component (G)). The nonionic surfactant functions as a dispersant in the oil-in-water cosmetic composition according to the present invention, and has the function of stabilizing the dispersed state.

[0040] The component (G) is not particularly limited as long as it is a nonionic surfactant commonly used in cosmetics, and examples thereof include fatty acid polyoxyalkylene glyceryl such as PEG-60 glyceryl isostearate; polyoxyethylene hydrogenated castor oil such as PEG-40 hydrogenated castor oil, PEG-60 hydrogenated castor oil, and PEG-100 hydrogenated castor oil; and polyoxyethylene-methylpolysiloxane copolymers such as PEG-3 dimethicone, PEG-9 dimethicone, PEG10-dimethicone, PEG12-dimethicone, and PEG-9 polydimethylsiloxyethyl dimethicone. polyglycerin fatty acid esters such as polyglyceryl-2 diisostearate and polyglyceryl-2 triisostearate; monoglycerin fatty acid esters such as glyceryl stearate and glyceryl oleate; polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monooleate and polyoxyethylene sorbitan monostearate; sorbitan fatty acid esters such as sorbitan sesquioleate, sorbitan sesquiisostearate, sorbitan isostearate, and sorbitan palmitate.

[0041] When used, the blending amount of component (G) is preferably 1.5% by mass or less, and more preferably 0.1 to 1.0% by mass, relative to the total mass of the cosmetic.

[0042] (H) Moisturizing Agent In addition to the above-mentioned components, the cosmetic according to the present invention may further contain a moisturizing agent (hereinafter sometimes referred to as component (H)). Component (H) has the effect of moisturizing the skin to which the cosmetic is applied.

[0043] Component (H) is selected depending on the intended purpose from moisturizers commonly used in cosmetics, such as propylene glycol, dipropylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate, sodium lactate, bile salts, dl-pyrrolidone carboxylate, short-chain soluble collagen, Rosa robur extract, Yarrow extract, and Melilot extract.

[0044] When used, the blending amount of component (H) is preferably 0.5 to 15% by mass, and more preferably 1 to 10% by mass, relative to the total mass of the cosmetic.

[0045] 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.

[0046] (a) lower alcohols, such as ethanol, propanol, isopropanol, isobutyl alcohol, and t-butyl alcohol; (b) sequestering agents, such as 1-hydroxyethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid tetrasodium salt, disodium edetate, trisodium edetate, tetrasodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetic acid, and trisodium ethylenediaminehydroxyethyltriacetate; (c) neutralizing agents, such as 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, potassium hydroxide, sodium hydroxide, triethanolamine, and sodium carbonate; (d) pH adjusters, such as buffers such as lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate; (e) antioxidants, for example, tocopherols, dibutylhydroxytoluene, butylhydroxyanisole, gallic acid esters, etc.; (f) preservatives, for example, phenoxyethanol, ethylparaben, butylparaben, etc.; (g) drugs, for example, caffeine, tannin, 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.; (h) skin whitening agents, for example, other skin whitening agents such as alkoxysalicylic acid or salts thereof, such as 4-methoxysalicylic acid potassium salt, vitamin C, magnesium ascorbyl phosphate, ascorbic acid glucoside, etc.; (i) ultraviolet absorbers.

[0047] 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 skin cleanser (e.g., face wash, makeup remover, etc.), a sunscreen cosmetic, an ointment, etc.

[0048] 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.

[0049] 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.

[0050] [Examples 1 to 7 and Comparative Examples 1 to 5] Oil-in-water cosmetics that can be used as liquid foundations were prepared by blending the components as shown in Table 1. The physical properties of the obtained cosmetics were evaluated as follows.

[0051] Resistance to sweat and sebum The prepared cosmetic was applied to a substrate and dried. Ion-exchanged water as a substitute for sweat or artificial sebum as a substitute for sebum was applied to the surface in an amount of 0.2 mg / cm. ２ The cosmetic was applied to form a coating film. The coating films were then tapped with a tapping machine to which artificial leather was attached, and the surfaces of the artificial leather and the coating film were observed and evaluated on the following four levels of A to D. A: The color of the cosmetic was not transferred at all or almost not at all to the tapped artificial leather. B: The color of the cosmetic was slightly transferred to the tapped artificial leather. C: The color of the cosmetic was attached to the tapped artificial leather. D: A mark from tapping was left on the cosmetic coating film.

[0052] Finish The prepared cosmetic was applied to the skin, and the finish was observed and rated on a 4-point scale from A to D. A: The finish is thin and uniform. B: The finish is slightly thick but uniform. C: The finish is thin but uneven. D: The finish is thick and uneven.

[0053] Fit The prepared cosmetic was applied to the skin, and the number of strokes until the base was absorbed into the skin was counted and rated on a 4-point scale from A to D. A: Blended in within 3 strokes. B: Blended in within 3 to 5 strokes. C: Blended in within 5 to 10 strokes. D: Not blended in within 10 strokes.

[0054] Stability The cosmetic was filled into a tube container, and the state of the cosmetic was observed when it was discharged from the tube container and evaluated on a four-point scale from A to D. A: The discharged cosmetic maintained a uniform single phase. B: The discharged cosmetic maintained a single phase, but there was a decrease in viscosity. C: A small amount of liquid oozed out of the discharged cosmetic. D: The discharged cosmetic separated into liquid and solid.

[0055] The results obtained are shown in Table 1.

[0056] In addition, Comparative Example 5, which did not contain agar, did not solidify, so some of the evaluations could not be carried out.

Claims

1. An oil-in-water cosmetic comprising (A) agar, (B) mica having a hydrophilic surface, (C) a non-silicone-treated coloring material, (D) silica, (E) water, and (F) an oil component, wherein the content of the component (A) is 0.01 to 1.3% by mass based on the total mass of the cosmetic.

2. The cosmetic according to claim 1, further comprising a thickening polysaccharide selected from the group consisting of succinoglucan and carboxymethyl cellulose.

3. The cosmetic according to claim 1 or 2, wherein the component (C) is a colored pigment treated with a treatment selected from a metal soap treatment, an amino acid treatment, and a fatty acid polyglyceryl ester treatment.

4. The cosmetic according to claim 1 or 2, wherein the total content of agar, succinoglucan, and carboxymethyl cellulose is 1.3% by mass or less based on the total mass of the cosmetic.

5. The cosmetic according to claim 1 or 2, wherein the content of the component (B) is 0.1 to 5% by mass based on the total mass of the cosmetic.

6. The cosmetic according to claim 1 or 2, wherein the content of the component (C) is 0.1 to 20% by mass based on the total mass of the cosmetic.

7. The cosmetic according to claim 1 or 2, wherein the oil absorption amount of the component (D) is 70 mL / 100 g or more.

8. The cosmetic according to claim 1 or 2, further comprising (G) a nonionic surfactant.

9. The cosmetic according to claim 1 or 2, further comprising (H) a humectant.

Images