Water-in-oil emulsion cosmetic

Abstract

To provide a water-in-oil emulsion cosmetic that contains a multilayered capsule containing a pigment and a polar oil, in which the multilayered capsule is prevented from crushing.SOLUTION: A water-in-oil emulsion cosmetic has (A) a multilayered capsule containing a pigment, (B) sodium salt with a molecular weight of 1000 or less, and (C) a polar oil. When a nonpolar oil is contained besides the (C) polar oil, the ratio of the nonpolar oil to the (C) polar oil is controlled to be 1 or less.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a water-in-oil emulsion cosmetic, and more particularly to a water-in-oil emulsion cosmetic containing multilayer capsules containing pigments.

Background Art

[0002] In recent years, cosmetics that change to a color different from the appearance color when applied to the skin, so-called cosmetics containing multilayer-type encapsulations containing pigments, are known. Since this multilayer capsule maintains its original form in the cosmetic before the product is applied to the skin, the visual effect of the pigment color is reduced or hidden. However, when the product is applied to the skin, the capsule is broken by the force acting during the application stroke (for example, by the palm or finger), and the pigment is released and spreads over the entire skin. As such a cosmetic, a water-in-oil emulsion sunscreen product containing an inorganic powder component and a multilayer capsule containing a pigment is known (Patent Document 1).

[0003] In general, in sunscreen cosmetics, when the amount of inorganic powder components such as titanium dioxide and zinc oxide used is large, a problem of excessive whiteness occurs. However, when a pigment is added to suppress the appearance of excessive whiteness, the color of the product before application tends to lack attractiveness to the user. The sunscreen cosmetic described in Patent Document 1 increases the use of an inorganic ultraviolet scattering agent to achieve a desired ultraviolet protection effect, and the multilayer capsule containing a pigment does not deteriorate either the appearance of the product itself before use or the appearance of the product after application to the skin.

[0004] Incidentally, Patent Document 1 contains a large amount of inorganic powder components, so there is no need to include a high concentration of highly polar UV absorbers. However, as a variation of sunscreen cosmetics, there is a demand for sunscreen cosmetics with higher SPF (Sun Protection Factor) values ​​that contain UV absorbers, and there are cases where a large amount of polar oil is desired for usability aspects such as wanting to make the skin look plumper or to enhance the skin's protective effect, or for reasons such as wanting to include oily agents. Furthermore, by using multilayer capsules containing pigments, it is possible to create BB (blemish balm) creams while maintaining a feel and appearance similar to skincare creams. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Special Publication No. 2017-515864 [Disclosure of the Invention] [Problems that the invention aims to solve]

[0006] However, when the inventors incorporated an ultraviolet absorber into a cosmetic composition containing pigment-containing multilayer capsules, they discovered that the polar oil caused the pigment-containing multilayer capsules to collapse in the product, impairing its stability. Based on this finding, the inventors conducted diligent research and discovered that by adding a specific metal salt to a cosmetic composition containing pigment-containing multilayer capsules and polar oil, the phenomenon of the pigment-containing multilayer capsules collapsing in the product could be suppressed, leading to the present invention.

[0007] In other words, the present invention aims to provide a water-in-oil emulsion cosmetic that can suppress the collapse of the pigment-containing multilayer capsules in a cosmetic composition containing a pigment and a polar oil. [Means for solving the problem]

[0008] The water-in-oil emulsion cosmetic composition of the present invention (A) A multilayer capsule containing a pigment, (B) Sodium salts with a molecular weight of 1000 or less, (C) Polar oil and, A water-in-oil emulsion cosmetic containing, (C) If a non-polar oil is included in addition to the polar oil, the ratio of the non-polar oil to the polar oil must be 1 or less.

[0009] (B) The sodium salt is preferably present in an amount of 0.2 to 2% by mass relative to the total amount of the cosmetic.

[0010] (C) Polar oil may be present in an amount of 6 to 40% by mass relative to the total amount of cosmetic product.

[0011] The water-in-oil emulsion cosmetic composition of the present invention preferably further contains cetyl PEG / PPG10-1 dimethicone.

[0012] If a non-polar oil is included, the amount of the non-polar oil may be 20% by mass or less of the total amount of the cosmetic.

[0013] The content of dimethicone and / or cyclic silicone oil in the nonpolar oil may be 10% by mass or less based on the total amount of the cosmetic.

[0014] The ultraviolet scattering agent may be present in an amount of 10% by mass or less relative to the total amount of the cosmetic.

[0015] The water-in-oil emulsion cosmetic composition of the present invention is composed of an aqueous phase and an oil phase, but the aqueous phase may be 30% by mass or more of the total amount of the cosmetic composition.

[0016] (A) It is preferable that the multilayer capsules containing the pigment be present in an amount of 0.1 to 3% by mass relative to the total amount of the cosmetic.

[0017] (A) Preferably, the number-average diameter of the multilayer capsules containing the pigment is less than 300 μm. [Effects of the Invention]

[0018] The water-in-oil emulsion cosmetic composition of the present invention (A) A multi-layer capsule containing a pigment, (B) A sodium salt having a molecular weight of 1000 or less, (C) A polar oil, which is a water-in-oil emulsion cosmetic containing When (C) a non-polar oil is contained in addition to the polar oil, the ratio of the non-polar oil to the polar oil (C) is 1 or less, so that it is possible to suppress the crushing of the multi-layer capsule containing the pigment.

Mode for Carrying Out the Invention

[0019] The water-in-oil emulsion cosmetic of the present invention is (A) A multi-layer capsule containing a pigment, (B) A sodium salt having a molecular weight of 1000 or less, (C) A polar oil, which is a water-in-oil emulsion cosmetic containing When (C) a non-polar oil is contained in addition to the polar oil, the ratio of the non-polar oil to the polar oil (C) is 1 or less. Hereinafter, each component will be described in detail. In this specification, PEG is polyethylene glycol, PPG is polypropylene glycol, EO is ethylene oxide, PO is propylene oxide, POE is polyoxyethylene, POP is polyoxypropylene, and VP is vinylpyrrolidone.

[0020] (A) Multi-layer capsule containing a pigment Multilayer capsules containing pigments (hereinafter also simply referred to as multilayer capsules) have a structure having an internal core or layer and one or more outer layers, and various pigments are arranged in the inner and outer parts. Commercially available multilayer capsules include MAGICOLOR (registered trademark) currently sold by Biogenics, Inc., Sugarcapsule Magic SP Series currently sold by Daito Kasei Kogyo Co., Ltd., TagraCap (trademark) currently sold by Tagra Biotechnology, and MicroBeads (trademark) currently sold by Salvona Technologies. Multilayer capsules can be produced, for example, as described in US Patent Application Publication US2011 / 0165208A1 (or corresponding EP2474299A2, JP2011-529104A, KR10-0978583B1 or WO2011 / 027960A2) (the entire content of which is incorporated herein by reference): preparing a solution of a first pigment, a plasticizer and a polymer; spray-drying this solution to form core particles in which the pigment is coated with the polymer; dispersing these core particles in a solution containing a second pigment; and spray-drying this dispersion to form capsule particles in which the second pigment is coated with the polymer.

[0021] One of the characteristics exhibited by multilayer capsules is sometimes referred to as "color reveal technology". Under normal conditions, the capsules have sufficient stability to hold the pigments inside and thus do not exhibit the same visual color effect as when exposed to the outside. However, when sufficient force is applied to the capsules, for example, when applying a cosmetic to the skin by hand, the capsules break and release the pigments, thereby changing the appearance color before and after application. The effect of the capsules is usually to suppress, although not completely, the color of the pigments. For example, the bulk of a multilayer capsule containing a red pigment appears slightly red, and the bulk of a multilayer capsule containing a yellow pigment appears slightly yellow.

[0022] The amount of multilayer capsules is not particularly limited as long as it is effective in achieving the desired visual effect when applied to the skin, but is preferably 0.1 to 3% by mass of the total amount of cosmetic, more preferably 0.3 to 2.5% by mass, even more preferably 0.5 to 2% by mass, and most preferably 0.8 to 1.8% by mass. An amount of 0.1% by mass or more of multilayer capsules can provide a sufficient skin tone correction effect, while an amount of 3% by mass or less can provide a natural and attractive finish for the user.

[0023] The diameter of the multilayer capsules is preferably less than 300 μm, more preferably 280 μm or less, more preferably 250 μm or less, even more preferably 150 μm or less, even more preferably 100 μm or less, and most preferably 60 μm or less. Here, diameter refers to the number average diameter. When the diameter of the multilayer capsules is less than 300 μm, the user may not feel that the product is gritty or sandy when applied to the skin, and it is easy to uniformly disperse the multilayer capsules in the cosmetic by simply stirring or mixing.

[0024] The color of the pigment contained in the multilayer capsule is not particularly limited, as long as the appearance of the product is attractive to the user both before and after application to the skin. The combination and proportions of color pigments such as red and yellow pigments can be changed as desired.

[0025] (B) Sodium salts with a molecular weight of 1000 or less Examples of sodium salts with a molecular weight of 1000 or less (hereinafter also simply referred to as sodium salts) include sodium chloride (table salt) and EDTA (ethylenediaminetetraacetic acid)-3Na. From the standpoint of versatility, sodium chloride and EDTA-3Na are preferred. Sodium salts can be used individually or in appropriate combinations of two or more types.

[0026] The sodium salt is preferably present in an amount of 0.1 to 2% by mass relative to the total amount of the cosmetic, and more preferably in an amount of 0.2 to 1.5% by mass. An amount of 0.1% by mass or more of sodium salt relative to the total amount of the cosmetic further suppresses the collapse of the multilayer capsules, while an amount of 2% by mass or less allows for a non-sticky finish on the skin after application.

[0027] (C) Polar oil (C) Polar oils are not particularly limited as long as they are typically used in cosmetics, pharmaceuticals, and food products. The IOB value is not particularly limited, but is preferably between 0.05 and 0.80. The IOB value is an abbreviation for Inorganic / Organic Balance, and it represents the ratio of inorganic to organic values, serving as an indicator of the degree of polarity of an organic compound. Specifically, the IOB value is: IOB value = Inorganic value / Organic value It is expressed as follows. Here, for each of the "inorganic value" and "organic value," for example, one carbon atom in a molecule has an "organic value" of 20, and one hydroxyl group has an "inorganic value" of 100. The "inorganic value" and "organic value" are set according to each atom or functional group, and the IOB value of the organic compound can be calculated by summing the "inorganic value" and "organic value" of all atoms and functional groups in the organic compound (see, for example, Fujita, "The Domain of Chemistry," Vol. 11, No. 10, pp. 719-725, 1957).

[0028] Typical examples of polar oils include ester oils and ultraviolet absorbers. Specific examples of ester oils include tripropylene glycol dieopentanoate, isononyl isononanoate, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, cetyl ethylhexanoate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glyceryl di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, tetra-2- Pentaerythrityl ethylhexanoate, triethylhexanoin (glyceryl tri-2-ethylhexanoate), glyceryl trioctanoate, glyceryl triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glyceryl trimiristicate, glyceride tri-2-heptyl undecanoate, methyl castor oil fatty acid ester, oleyl oleate, acetoglycerol Examples include iodide, 2-heptyl undecyl palmitate, diisobutyl adipate, 2-octyldodecyl N-lauroyl-L-glutamate, 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.

[0029] Examples of UV absorbers include a wide range of highly polar, oily UV absorbers commonly used in cosmetics, and are not particularly limited. For example, benzoic acid derivatives, salicylic acid derivatives, cinnamic acid derivatives, dibenzoylmethane derivatives, β,β-diphenyl acrylate derivatives, benzophenone derivatives, benzylidene camphor derivatives, phenylbenzimidazole derivatives, triazine derivatives, phenylbenzotriazole derivatives, anthranyl derivatives, imidazoline derivatives, benzalmalonate derivatives, 4,4-diarylbutadiene derivatives, etc. Specific examples and trade names are listed below, but are not limited to these.

[0030] Examples of benzoic acid derivatives include ethyl para-aminobenzoate (PABA), ethyl-dihydroxypropyl PABA, ethylhexyl-dimethyl PABA (e.g., "Escalol 507"; ISP), glyceryl PABA, PEG-25-PABA (e.g., "Ubinal P25"; BASF), and diethylaminohydroxybenzoyl hexyl benzoate (e.g., "Ubinal A Plus").

[0031] Examples of salicylic acid derivatives include homosalate ("Eusolex HMS"; Lona / EM Industries), ethylhexyl salicylate (e.g., "NeoHeliopan OS"; Herman & Raymer), dipropylene glycol salicylate (e.g., "Dipsal"; Skell), and TEA salicylate (e.g., "NeoHeliopan TS"; Herman & Raymer).

[0032] Examples of cinnamic acid derivatives include octyl methoxycinnamate or ethylhexyl methoxycinnamate (e.g., "Parsol MCX"; Hoffmann-La Roche), isopropyl methoxycinnamate, isoamyl methoxycinnamate (e.g., "Neo-Heliopan E1000"; Herman & Raymer), cinnoxate, DEA methoxycinnamate, diisopropyl methylcinnamate, glyceryl-ethylhexanoate-dimethoxycinnamate, and di-(2-ethylhexyl)-4'-methoxybenzalmalonate. Examples of dibenzoylmethane derivatives include 4-tert-butyl-4'-methoxydibenzoylmethane (e.g., "Parsol 1789").

[0033] Examples of β,β-diphenyl acrylate derivatives include octocrylene (e.g., "Ubinal N539"; BASF). Examples of benzophenone derivatives include benzophenone-1 (e.g., "Uvinal 400"; BASF), benzophenone-2 (e.g., "Uvinal D50"; BASF), benzophenone-3 or oxybenzone (e.g., "Uvinal M40"; BASF), benzophenone-4 (e.g., "Uvinal MS40"; BASF), benzophenone-5, benzophenone-6 (e.g., "Helisorb 11"; Norquay), benzophenone-8 (e.g., "Spectra-Sorb UV-24"; American Cyanamide), benzophenone-9 (e.g., "Uvinal DS-49"; BASF), and benzophenone-12.

[0034] Examples of benzylidene camphor derivatives include 3-benzylidene camphor (e.g., "Mexoryl SD"; CIMEX), 4-methylbenzylidene camphor, benzylidene camphor sulfonic acid (e.g., "Mexoryl SL"; CIMEX), benzalkonium camphor methosulfate (e.g., "Mexoryl SO"; CIMEX), terephthalylidene disodium camphor sulfonic acid (e.g., "Mexoryl SX"; CIMEX), and polyacrylamide methylbenzylidene camphor (e.g., "Mexoryl SW"; CIMEX). Examples of phenylbenzimidazole derivatives include phenylbenzimidazole sulfonic acid (e.g., "Eusorex 232"; Merck) and phenyldibenzimidazole tetrasulfonate disodium (e.g., "Neo-Heliopan AP"; Hermann & Raymer).

[0035] Examples of triazine derivatives include anisotriazine (e.g., "Tinosorb S"; Ciba Specialty Chemicals), ethylhexyltriazone (e.g., "Uvinal T150"; BASF), diethihexylbutamidetriazone (e.g., "Uvasorb HEB"; Sigma-3V), and 2,4,6-tris(diisobutyl-4'-aminobenzalmalonate)-s-triazine.

[0036] Examples of phenylbenzotriazole derivatives include drometrizole trisiloxane (e.g., "Silatrizole"; Rhodia Simiy Corporation) and methylenebis (benzotriazolyltetramethylbutylphenol) (e.g., "Tinosorb M" (Ciba Specialty Chemicals)).

[0037] Examples of anthranil derivatives include menthyl anthranilate (e.g., "Neo-Heliopan MA"; Herman & Raymer). Examples of imidazoline derivatives include ethylhexyldimethoxybenzylidenedioxoimidazoline propionate.

[0038] Examples of benzalmalonate derivatives include polyorganosiloxanes having a benzalmalonate functional group (e.g., polysilicone-15; "Parsol SLX"; DSM Nutrition Japan). Examples of 4,4-diarylbutadiene derivatives include 1,1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene. (C) Polar oils may be used individually or in combination of two or more types.

[0039] (C) The amount of polar oil is preferably 6 to 40% by mass, more preferably 8 to 38% by mass, and more preferably 10 to 35% by mass, based on the total amount of cosmetic. The amount of UV absorber contained in the polar oil is preferably 20% by mass or more, more preferably 40% by mass or more, and more preferably 60% by mass or more of the polar oil, and all of the polar oil may be UV absorbers. Having 6% by mass or more of polar oil can make the skin look plumper and smoother and can further enhance the skin protection effect. Also, having 40% by mass or less can further suppress stickiness and shine.

[0040] (non-polar oil) The water-in-oil emulsion cosmetic composition of the present invention does not necessarily contain oils other than the (C) polar oil, or non-polar oils, but if they are included, the ratio of non-polar oil to (C) polar oil is 1 or less. The ratio of non-polar oil to (C) polar oil is more preferably 0.8 or less, and even more preferably 0.6 or less. Multilayer capsules are less stable due to polar oils, but since the water-in-oil emulsion cosmetic composition of the present invention contains a sodium salt, the phenomenon of multilayer capsules collapsing in the product can be suppressed, so that multilayer capsules can be stably included in the cosmetic composition even if the ratio of non-polar oil to (C) polar oil is 1 or less.

[0041] Examples of non-polar oils include silicone oil, liquid paraffin, squalane, squalene, paraffin, and hydrocarbon oils such as isohexadecane.

[0042] As for silicone oils, dimethylpolysiloxane ,mosquito Prilylmethicone , Me Chain-like silicone oils such as chlorohydrogenpolysiloxane, and cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. Examples include oils, etc.

[0043] When a nonpolar oil is included, the amount of the nonpolar oil may be 20% by mass or less of the total amount of the cosmetic. Multilayer capsules are less likely to collapse when there is a higher amount of nonpolar oil, but because the present invention contains a sodium salt, the collapse of the multilayer capsule can be suppressed even if the amount of nonpolar oil is 20% by mass or less of the total amount of the cosmetic.

[0044] (Cetyl PEG / PPG10-1 Dimethicone) The water-in-oil emulsion cosmetic composition of the present invention preferably further contains cetyl PEG / PPG10-1 dimethicone. Including cetyl PEG / PPG10-1 dimethicone can improve emulsion stability. Examples of commercially available cetyl PEG / PPG10-1 dimethicone that can be used include ABIL EM90, EM180 (Evonik Industries AG), KF-6038 (Shin-Etsu Chemical Co., Ltd.), etc. Cetyl PEG / PPG10-1 dimethicone may be used alone or in combination of two or more types.

[0045] The amount of cetyl PEG / PPG10-1 dimethicone is 0.5 to 10% by mass of the total amount of cosmetic, preferably 1 to 5% by mass. (A) When the amount of cetyl PEG / PPG10-1 dimethicone is 0.5% by mass or more, better emulsification stability can be achieved, and when it is 10% by mass or less, a more refreshing feel can be obtained.

[0046] When the water-in-oil emulsion cosmetic composition of the present invention further contains cetyl PEG / PPG10-1 dimethicone, the content of dimethicone and / or cyclic silicone oil in the non-polar oil may be 10% by mass or less, more preferably 9% by mass or less, and even more preferably 8% by mass or less, based on the total amount of the cosmetic composition. When cetyl PEG / PPG10-1 dimethicone is further included, even if the content of dimethicone and / or cyclic silicone oil is 10% by mass or less based on the total amount of the cosmetic composition, high-temperature stability can be further improved.

[0047] In the water-in-oil emulsion cosmetic composition of the present invention, the amount of ultraviolet scattering agent may be 10% by mass or less relative to the total amount of the cosmetic composition. As described above, the water-in-oil emulsion cosmetic composition of the present invention can contain a high concentration of ultraviolet absorbers, and from the viewpoint of SPF value, the amount of inorganic powder components, such as titanium dioxide and zinc oxide, which are ultraviolet scattering agents, may be 10% by mass or less, preferably 8% by mass or less, more preferably 5% by mass or less, and particularly 3% by mass or less.

[0048] The aqueous phase component of the water-in-oil emulsion cosmetic of the present invention is mainly water and contains various water-soluble components, and can be incorporated into the water-in-oil emulsion cosmetic of the present invention in a proportion of 30% by mass or more, more preferably 40% by mass or more and less than 55% by mass. When the aqueous phase is high, multilayer capsules tend to collapse easily, but since the water-in-oil emulsion cosmetic of the present invention contains sodium salts, the multilayer capsules do not collapse even when the aqueous phase is 30% by mass or more, and a fresh feeling can be achieved.

[0049] In addition to the above-mentioned components, the cosmetic composition of the present invention may contain one or more components commonly used in cosmetics and quasi-drugs, such as humectants, powder components, liquid oils and fats, solid oils and fats, waxes, higher fatty acids, higher alcohols, surfactants, thickeners, sugars, and pharmaceuticals. Examples of components that can be included are given below.

[0050] Examples of humectants include polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, carotenoid acid, atelocollagen, sodium lactate, bile salts, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerin (EO)PO adduct, Rosa rugosa extract, Achillea millefolium extract, and Melilotus extract.

[0051] Examples of powder components include inorganic powders (e.g., talc, kaolin, mica, sericite, muscovite, phlogopite, synthetic mica, rose mica, biotite, vermiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, tungstate metal salts, magnesium, silica, zeolite, barium sulfate, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluorapatite, hydroxyapatite, ceramic powder) Wood, metal soaps (e.g., zinc myristate, calcium palmitate, aluminum stearate), boron nitride, etc.); organic powders (e.g., polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, styrene-acrylic acid copolymer resin powder, benzoguanamine resin powder, polytetrafluoroethylene powder, cellulose powder, etc.); inorganic white pigments (e.g., zinc oxide, etc.); inorganic red pigments (e.g., iron titanate, etc.); inorganic purple pigments (e.g., mango violet, cobalt violet, etc.); inorganic green pigments (e.g., chromium oxide, chromium hydroxide, cobalt titanate, etc.); inorganic blue pigments (e.g., ultramarine, Prussian blue, etc.); pearl pigments (e.g., titanium dioxide coated mica, titanium dioxide coated bismuth oxychloride, titanium dioxide coated talc, colored titanium dioxide coated mica, bismuth oxychloride, fish scale foil, etc.); metal powder pigments (e.g., aluminum powder, copper powder, etc.); organic pigments such as zirconium, barium or aluminum lake (e.g., Examples include organic pigments such as Red 201, Red 202, Red 204, Red 205, Red 220, Red 226, Red 228, Red 405, Orange 203, Orange 204, Yellow 205, Yellow 401, and Blue 404; Red 3, Red 104, Red 106, Red 227, Red 230, Red 401, Red 505, Orange 205, Yellow 4, Yellow 5, Yellow 202, Yellow 203, Green 3, and Blue 1; and natural pigments (e.g., chlorophyll, β-carotene, etc.).

[0052] Examples of liquid oils include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, peach kernel oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, elm oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnamon oil, Japanese tuni oil, jojoba oil, wheat germ oil, and triglycerin.

[0053] Examples of solid fats and oils include cocoa butter, coconut oil, horse fat, hydrogenated coconut oil, palm oil, beef tallow, sheep fat, hydrogenated beef tallow, palm kernel oil, lard, beef bone fat, Japanese wax kernel oil, hydrogenated oil, beef tallow, Japanese wax, and hydrogenated castor oil.

[0054] Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, privet wax, whale wax, montan wax, rice bran wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugarcane wax, isopropyl lanolin fatty acid, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, and POE hydrogenated lanolin alcohol ether.

[0055] Examples of high-grade fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tallic acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).

[0056] 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.) and branched-chain alcohols (e.g., monostearyl glycerol ether (batyl alcohol), 2-decyltetradecinol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, octyldodecanol, etc.).

[0057] Furthermore, the cosmetic composition of the present invention may contain various surfactants as emulsifiers. Examples of anionic surfactants include fatty acid soaps (e.g., sodium laurate, sodium palmitate, etc.); higher alkyl sulfate salts (e.g., sodium lauryl sulfate, potassium lauryl sulfate, etc.); alkyl ether sulfate salts (e.g., POE-triethanolamine lauryl sulfate, POE-sodium lauryl sulfate, etc.); N-acyl sarcosinate (e.g., sodium lauroyl sarcosinate, etc.); higher fatty acid amide sulfonates (e.g., sodium N-myristoyl-N-methyltaurate, sodium coconut oil fatty acid methyl taulide, sodium lauryl methyl taulide, etc.); phosphate salts (e.g., sodium POE-oleyl ether phosphate, POE-stearyl ether phosphate, etc.); sulfosuccinates (e.g., sodium di-2-ethylhexyl sulfosuccinate, sodium monolauroyl monoethanolamide polyoxyethylene sulfosuccinate, sodium lauryl polypropylene glycol sulfosuccinate, etc.) Examples include sodium sinate, alkylbenzene sulfonates (e.g., linear dodecylbenzenesulfonate sodium, linear dodecylbenzenesulfonate triethanolamine, linear dodecylbenzenesulfonate, etc.), higher fatty acid ester sulfates (e.g., hydrogenated coconut oil fatty acid glycerin sulfate sodium, etc.), N-acyl glutamates (e.g., N-lauroyl glutamate monosodium, N-stearoyl glutamate disodium, N-myristoyl-L-glutamate monosodium, etc.), sulfated oils (e.g., belladonna oil, etc.), POE-alkyl ether carboxylic acids, POE-alkyl allyl ether carboxylic acid salts, α-olefin sulfonates, higher fatty acid ester sulfonates, secondary alcohol sulfates, higher fatty acid alkylolamide sulfates, lauroyl monoethanolamide succinate sodium, N-palmitoyl aspartate ditriethanolamine, sodium caseinate, etc.

[0058] Examples of cationic surfactants include alkyltrimethylammonium salts (e.g., stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, etc.); alkylpyridinium salts (e.g., cetylpyridinium chloride, etc.); distearyldimethylammonium chloride dialkyldimethylammonium salt; poly(N,N'-dimethyl-3,5-methylenepiperidinium) chloride; alkylquaternary ammonium salts; alkyldimethylbenzylammonium salts; alkylisoquinolinium salts; dialkylmolyphonium salts; POE-alkylamines; alkylamine salts; polyamine fatty acid derivatives; amyl alcohol fatty acid derivatives; benzalkonium chloride; benzethonium chloride, etc.

[0059] Examples of amphoteric surfactants include imidazoline-based amphoteric surfactants (e.g., 2-undecyl-N,N,N-(hydroxyethylcarboxymethyl)-2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, etc.); and betaine-based surfactants (e.g., 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryldimethylaminoacetic acid betaine, alkyl betaine, amide betaine, sulfobetaine, etc.).

[0060] Examples of lipophilic nonionic surfactants include sorbitan fatty acid esters (e.g., sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, sorbitan trioleate, sorbitan penta-2-ethylhexylate diglycerol sorbitan, sorbitan tetra-2-ethylhexylate diglycerol sorbitan, etc.); glycerin polyglycerin fatty acids (e.g., monocottonseed oil fatty acid glycerin, monoerucate glycerin, sesquioleate glycerin, monostearate glycerin, α,α'-oleate pyroglutamate glycerin, monostearate glycerin malic acid, etc.); propylene glycol fatty acid esters (e.g., propylene glycol monostearate, etc.); hydrogenated castor oil derivatives; and glycerin alkyl ethers.

[0061] Examples of hydrophilic nonionic surfactants include POE-sorbitan fatty acid esters (e.g., POE-sorbitan monooleate, POE-sorbitan monostearate, POE-sorbitan monooleate, POE-sorbitan tetraoleate, etc.); POE-sorbitol fatty acid esters (e.g., POE-sorbitol monolaurate, POE-sorbitol monooleate, POE-sorbitol pentaoleate, POE-sorbitol monostearate, etc.); POE-glycerin fatty acid esters (e.g., POE-glycerin monostearate, etc.). POE-monoleates such as POE-glycerin monoisostearate, POE-glycerin triisostearate, etc.); POE-fatty acid esters (e.g., POE-distearate, POE-monodiolate, ethylene glycol distearate, etc.); POE-alkyl ethers (e.g., POE-lauryl ether, POE-oleyl ether, POE-stearyl ether, POE-behenyl ether, POE-2-octyldodecyl ether, POE-cholestanol ether, etc.); Pluronic types (e.g., Pluronic (e.g., POE·POP-alkyl ethers (e.g., POE·POP-cetyl ether, POE·POP-2-decyltetradecyl ether, POE·POP-monobutyl ether, POE·POP-hydrogenated lanolin, POE·POP-glycerin ether, etc.); tetra-POE·tetraPOP-ethylenediamine condensates (e.g., tetronic, etc.); POE-castor oil hydrogenated castor oil derivatives (e.g., POE-castor oil, POE-hydrogenated castor oil, POE-hydrogenated castor oil monoisostearate, POE-hydrogenated castor oil triisostearate, PO Examples include: E-hydrogenated castor oil monopyloglutamic acid monoisostearate diester, POE-hydrogenated castor oil maleic acid, etc.); POE-beeswax / lanolin derivatives (e.g., POE-sorbitol beeswax, etc.); alkanolamides (e.g., coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, fatty acid isopropanolamide, etc.); POE-propylene glycol fatty acid esters; POE-alkylamines; POE-fatty acid amides; sucrose fatty acid esters; alkylethoxydimethylamine oxide; trioleyl phosphate, etc.

[0062] Examples of thickening agents include plant-derived polymers such as gum arabic, tragacanth, galactan, carob gum, guar gum, karaya gum, carrageenan, xanthan gum, pectin, agar, quince seed (quince), and algae colloid (brown algae extract); microbial polymers such as dextran, succinoglucan, and pullulan; animal-derived polymers such as collagen, casein, albumin, and gelatin; cellulose-based polymers such as methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, hydroxypropylcellulose, sodium carboxymethylcellulose, crystalline cellulose, and cellulose powder; and alginate-based polymers such as sodium alginate and propylene glycol alginate.

[0063] Other examples include vinyl polymers such as polyvinyl methyl ether and carboxyvinyl polymer, polyoxyethylene polymers, polyoxyethylene polyoxypropylene copolymer polymers, acrylic polymers such as polyethyl acrylate and polyacrylamide, inorganic water-soluble polymers such as polyethyleneimine, cationic polymers, bentonite, magnesium aluminum silicate, laponite, hectorite, and anhydrous silicic acid, PEG-240 / decyltetradeceth-20 / hexamethylene diisocyanate copolymer, (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer, (sodium acrylate / acryloyldimethyltaurate) copolymer, (alkyl acrylate / steareth-20 methacrylate) copolymer, (ammonium acryloyldimethyltaurate / VP) copolymer, dextrin, sodium pectinate, sodium araginate, dialkyldimethylammonium sulfate cellulose, magnesium aluminum silicate, bentonite, hectorite, A1Mg silicate (bee gum), laponite, and anhydrous silicic acid.

[0064] Examples of monosaccharides include trioses (e.g., D-glyceryl aldehyde, dihydroxyacetone, etc.); tetraoses (e.g., D-erythrose, D-erythrolose, D-threose, etc.); pentoses (e.g., L-arabinose, D-xylose, L-lyxose, D-arabinose, D-ribose, D-ribulose, D-xylulose, L-xylulose, etc.); hexoses (e.g., D-glucose, D-talose, D-busicose, D-galactose, D-fructose, L-galactose, L-mannose). Examples include: glycerides, D-tagatose, etc.; heptose (e.g., aldoheptose, hepros, etc.); octose (e.g., octulose, etc.); deoxy sugars (e.g., 2-deoxy-D-ribose, 6-deoxy-L-galactose, 6-deoxy-L-mannose, etc.); amino sugars (e.g., D-glucosamine, D-galactosamine, sialic acid, aminouronic acid, muramic acid, etc.); uronic acids (e.g., D-glucuronic acid, D-mannuronic acid, L-glucuronic acid, D-galacturonic acid, L-iduronic acid, etc.).

[0065] Examples of oligosaccharides include sucrose, gunthianose, umbelliferose, lactose, planteose, isolichnoses, α,α-trehalose, raffinose, licnoses, unbilicin, stachyose, and vervasocose.

[0066] Examples of amino acids include neutral amino acids (e.g., threonine, cysteine, etc.) and basic amino acids (e.g., hydroxylysine, etc.). Examples of amino acid derivatives include sodium acyl sarcosinate (sodium lauroyl sarcosinate), acyl glutamate, sodium acyl β-alanine, glutathione, and pyrrolidone carboxylic acid.

[0067] Examples of organic amines include monoethanolamine, diethanolamine, triethanolamine, morpholine, triisopropanolamine, 2-amino-2-methyl-1,3-propanediol, and 2-amino-2-methyl-1-propanol.

[0068] Examples of alkylene oxide derivatives include POE(9)POP(2)dimethyl ether, POE(14)POP(7)dimethyl ether, POE(10)POP(10)dimethyl ether, POE(6)POP(14)dimethyl ether, POE(15)POP(5)dimethyl ether, POE(25)POP(25)dimethyl ether, POE(7)POP(12)dimethyl ether, POE(22)POP(40)dimethyl ether, and POE(35)POP(40)dimethyl ether. Examples include ether, POE(50)POP(40) dimethyl ether, POE(55)POP(30) dimethyl ether, POE(30)POP(34) dimethyl ether, POE(25)POP(30) dimethyl ether, POE(27)POP(14) dimethyl ether, POE(55)POP(28) dimethyl ether, POE(36)POP(41) dimethyl ether, POE(7)POP(12) dimethyl ether, POE(17)POP(4) dimethyl ether, and the like.

[0069] Examples of metal ion chelating agents include 1-hydroxyethane-1,1-diphosphonic acid, tetrasodium 1-hydroxyethane-1,1-diphosphonic acid, disodium edetate, trisodium edetate, tetrasodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetate, and trisodium ethylenediaminehydroxyethyl triacetate.

[0070] Examples of antioxidants include phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, fumaric acid, kephalin, hexametaphosphorate, phytic acid, and ethylenediaminetetraacetic acid.

[0071] Other possible ingredients include, for example, preservatives (ethylparaben, butylparaben, etc.); whitening agents (for example, placental extract, saxifrage extract, ascorbic acid or its derivatives, tranexamic acid, arbutin, etc.); and blood circulation promoters (nicotinic acid, benzyl nicotinate, tocopherol nicotinate, β-butoxyester nicotinate, minoxidil or its analogs, γ-oryzanol, alkoxycarbonylpyridine N-oxide, carpronium chloride, and acetylcholine or its derivatives, etc.) Examples include various extracts (e.g., ginger, Phellodendron bark, Coptis japonica, Lithospermum erythrorhizon, birch, loquat, carrot, aloe, mallow, iris, grape, loofah, lily, saffron, Cnidium officinale, ginger, St. John's wort, ononis, garlic, chili pepper, dried tangerine peel, Angelica acutiloba, peony, seaweed, etc.), activators (e.g., panthenyl ethyl ether, nicotinamide, biotin, pantothenic acid, royal jelly, cholesterol derivatives, etc.), and anti-seborrheic agents (e.g., pyridoxines, thianthol, etc.).

[0072] The water-in-oil emulsion cosmetic composition of the present invention specifically includes emulsions, skincare creams, hair creams, liquid foundations, eyeliners, mascaras, eyeshadows, and other emulsion or cream-like products, which are manufactured from the above-mentioned components by conventional methods. [Examples]

[0073] The present invention will now be described in more detail with reference to examples. The present invention is not limited in any way by the following examples.

[0074] [Reference examples 1~4] Water-in-oil emulsion cosmetics containing non-polar oils, where the ratio of non-polar oil to polar oil is greater than 1 (sunscreen cosmetics, Reference Examples 1 and 2), as well as the cosmetics of Example 1 (Reference Example 3) of Patent Document 1 and Reference Example 4, which is an increased amount of aqueous phase in Reference Example 3, were prepared using the formulations shown in Table 1. The cosmetics were prepared by placing the oil and surfactant in a container and mixing them in a homogenizer until the composition was uniform. After mixing, the powder was added and mixed in a homogenizer until the composition was uniform. Next, the aqueous phase was added to the container and mixed in a homogenizer again until the composition was uniform. Finally, the layered capsules were added to the container and the composition was mixed by a gentle side sweep. The obtained cosmetics were evaluated for the suppression of crushing of the multilayer capsules according to the following criteria.

[0075] [Examples 1-6, Comparative Examples 1 and 2] Sunscreen cosmetics, which are water-in-oil emulsion cosmetics, were prepared in the same manner as the reference examples above using the formulations shown in Table 2. The obtained sunscreen cosmetics were evaluated for their ability to suppress the collapse of multilayer capsules according to the following criteria.

[0076] Further details regarding the product names and other information of the raw materials listed in the table are as follows. *1: Duck Algin NSPH (manufactured by Kikkoman Biochemifa Co., Ltd.: weight-average molecular weight 300,000) *2: ABIL EM180 *3: ABIL EM90 *4: EP1-CR-50P (manufactured by Daito Kasei Kogyo Co., Ltd.) *5: Techpolymer MBP-8HP (manufactured by Sekisui Plastics Co., Ltd.) *6: Tospar 2000B (manufactured by Momentive Performance Materials Japan) *7: Nylon SP-500 (manufactured by Toray Industries, Inc.) *8: Silicone KF-96A-6T (manufactured by Shin-Etsu Chemical Co., Ltd.) *9: Silicone KF-96L-1.5CS (manufactured by Shin-Etsu Chemical Co., Ltd.) *10: Magical Color 103RP (Biogenics, Inc.: Number average diameter 60 μm) *11: Magical Color 103YP (Biogenics, Inc.: Number average diameter 60 μm) *12: Magical Color 103BL (Biogenics, Inc.: Number average diameter 60 μm)

[0077] <Evaluation of suppression of crushing of multilayer capsules> After storing each sample of cosmetic at 70°C for 3 days, the condition of the crushed multilayer capsules was visually observed and evaluated according to the following criteria. A: The multilayer capsules show almost no crushing and no color change. B: The multilayer capsule shows slight crushing and slight discoloration. C: The multilayer capsule has collapsed, and a clear color change has occurred.

[0078] [Table 1]

[0079] [Table 2]

[0080] In Reference Examples 1 and 2 shown in Table 1, the ratio of non-polar oil to polar oil was greater than 1, resulting in almost no collapse of the multilayer capsules and no color change. Reference Example 4 is an increased amount of aqueous phase in Reference Example 3, and comparing the two, it can be seen that increasing the amount of aqueous phase tends to make the multilayer capsules more prone to collapse. In Examples 1 to 6 shown in Table 2, the ratio of non-polar oil to polar oil was 1 or less, but because they contained sodium salts with a molecular weight of 1000 or less, there was almost no collapse of the multilayer capsules, or slight collapse was observed in the multilayer capsules, but there was no color change, or the change was slight and did not cause any problems. On the other hand, in Comparative Example 1, which did not contain sodium salts, and in Comparative Example 2, which used high molecular weight sodium alginate, the multilayer capsules collapsed and a clear color change occurred. It is not entirely clear why high molecular weight sodium salts cannot suppress the collapse of multilayer capsules, but it is presumed that the presence of free sodium contributes to the collapse of the multilayer capsules. Some embodiments of this disclosure are described in the following sections [1]-

[10] . [Item 1] (A) A multilayer capsule containing a pigment, (B) Sodium salts with a molecular weight of 1000 or less, (C) Polar oil and, A water-in-oil emulsion cosmetic containing, In the case where a non-polar oil is included in addition to the (C) polar oil, the ratio of the non-polar oil to the (C) polar oil is 1 or less in an oil-water-in-oil emulsion cosmetic. [Item 2] The water-in-oil emulsion cosmetic according to item 1, comprising 0.2 to 2% by mass of the sodium salt (B) based on the total amount of the cosmetic. [Item 3] The water-in-oil emulsion cosmetic according to item 1 or 2, comprising 6 to 40% by mass of the (C) polar oil based on the total amount of the cosmetic. [Item 4] A water-in-oil emulsion cosmetic according to item 1, 2, or 3, further comprising cetyl PEG / PPG10-1 dimethicone. [Item 5] The water-in-oil emulsion cosmetic according to any one of items 1 to 4, wherein the non-polar oil is 20% by mass or less of the total amount of the cosmetic. [Item 6] The water-in-oil emulsion cosmetic according to item 4 or 5, wherein the content of dimethicone and / or cyclic silicone oil in the nonpolar oil is 10% by mass or less with respect to the total amount of the cosmetic. [Item 7] An oil-in-oil emulsion cosmetic according to any one of items 1 to 6, wherein the ultraviolet scattering agent is 10% by mass or less of the total amount of the cosmetic. [Item 8] An oil-in-oil emulsion cosmetic according to any one of items 1 to 7, wherein the aqueous phase is 30% by mass or more of the total amount of the cosmetic. [Item 9] A water-in-oil emulsion cosmetic according to any one of items 1 to 8, comprising 0.1 to 3% by mass of a multilayer capsule containing the pigment (A) mentioned above, based on the total amount of the cosmetic. [Item 10] A water-in-oil emulsion cosmetic according to any one of items 1 to 9, wherein the number average diameter of the multilayer capsules containing the pigment (A) is less than 300 μm.

Claims

1. (A) A multilayer capsule containing a pigment and a polymer, (B) Sodium salts with a molecular weight of 1000 or less, (C) Polar oil and Water and, A water-in-oil emulsion cosmetic containing, The (B) sodium salt with a molecular weight of 1000 or less is at least one selected from sodium chloride and sodium EDTA, and is present in an amount of 0.1% by mass or more of the total amount of the cosmetic composition. The (C) polar oil is tripropylene glycol dieopentanoate, isononyl isononanoate, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylhexane Cetyl acid, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythrityl tetra-2-ethylhexanoate, triethylhexanoin (glycerin tri-2-ethylhexanoate), trioc Glycerin tanate, glycerin triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glycerin trimyristate, glyceride tri-2-heptylundecanoate, methyl castor oil fatty acid ester, oleyl oleate, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di-2-heptyl adipate The (C) polar oil is selected from decyl, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipic acid, diisopropyl sebacate, 2-ethylhexyl succinate, triethyl citrate, an ultraviolet absorber having an IOB value of 0.05 to 0.80, PPG-17, isostearic acid, and diphenylsiloxyphenyl trimethicone, and the (C) polar oil is present in an amount of 6 to 40% by mass relative to the total amount of the cosmetic. If a non-polar oil is included in addition to the polar oil (C) mentioned above, the ratio of the non-polar oil to the polar oil (C) is 1 or less, and the non-polar oil is at least one selected from dimethylpolysiloxane, caprylyl methicone, methylhydrogenpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, liquid paraffin, squalane, squalene, paraffin, and isohexadecane. Water-in-oil emulsion cosmetic.

2. The water-in-oil emulsion cosmetic according to claim 1, comprising 0.2 to 2% by mass of the (B) sodium salt based on the total amount of the cosmetic.

3. The water-in-oil emulsion cosmetic composition according to claim 1 or 2, further comprising cetyl PEG / PPG10-1 dimethicone.

4. The water-in-oil emulsion cosmetic according to any one of claims 1 to 3, wherein the non-polar oil is 20% by mass or less of the total amount of the cosmetic.

5. The water-in-oil emulsion cosmetic according to claim 3 or 4, wherein the content of at least one selected from dimethylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane in the nonpolar oil is 10% by mass or less with respect to the total amount of the cosmetic.

6. The water-in-oil emulsion cosmetic according to any one of claims 1 to 5, wherein the ultraviolet scattering agent is 10% by mass or less of the total amount of the cosmetic.

7. The water-in-oil emulsion cosmetic according to any one of claims 1 to 6, comprising 0.1 to 3% by mass of the multilayer capsules containing the pigment and polymer (A) based on the total amount of the cosmetic.

8. The water-in-oil emulsion cosmetic composition according to any one of claims 1 to 7, wherein the number average diameter of the multilayer capsules containing the pigment and polymer (A) is less than 300 μm.

Images