Emulsion composition

Abstract

To provide an emulsifying composition that is free from stickiness and squeaky feeling, has good skin compatibility, provides a moist feeling, and has excellent emulsification stability. To provide. [Solution] The emulsified composition according to this disclosure contains (A) niacin or a derivative thereof in an amount of 1% to 10% by mass, (B) phospholipid or a derivative thereof, (C) stearyl glycyrrhetinate in an amount of 0.06% to 3% by mass, (D) oil, and (E) water.

Description

Technical Field

[0001] The present disclosure relates to an emulsified composition.

Background Art

[0002] An oil-in-water emulsified composition is preferred as a cosmetic base that provides a refreshing feeling upon use because the external phase (continuous phase), i.e., the phase that first touches the skin, is the aqueous phase. Various attempts have been made to improve such an oil-in-water emulsified base and make a cosmetic with even better usability.

[0003] On the other hand, niacinamide, which is one of the B vitamins, is used as a component of topical medications for the treatment of acne (寻常性痤疮) and is also incorporated into cosmetics for cosmetic purposes. In Japan, it is approved as an active ingredient for improving spots and wrinkles in quasi-drugs cosmetics. It is known that in order to improve spots and wrinkles with niacinamide, it is necessary to incorporate 3% by mass or more. However, it is known that containing a large amount of nicotinamide causes undesirable usability such as stickiness.

[0004] In order to improve the usability of such nicotinamide, an oil-in-water emulsified composition containing a specific amount of nicotinamide, phospholipid, nonionic surfactant, polyhydric alcohol, and an oil agent that is liquid at 25°C and water has been proposed (see Patent Document 1). This proposed oil-in-water emulsified composition is disclosed to improve the firmness and elasticity of the skin, be non-sticky, and reduce powdering of nicotinamide after water evaporation while having excellent emulsion stability (see Patent Document 1).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In view of the above, the object of this disclosure is to provide an emulsified composition that is free from stickiness and squeaky feeling, and has excellent compatibility with the skin, moisturizing effect, and emulsification stability. [Means for solving the problem]

[0007] To solve the above problems, one embodiment of the emulsified composition according to the present disclosure contains (A) niacin or a derivative thereof in an amount of 1% to 10% by mass, (B) phospholipid or a derivative thereof, (C) stearyl glycyrrhetinate in an amount of 0.06% to 3% by mass, (D) oil, and (E) water. [Effects of the Invention]

[0008] According to this disclosure, it is possible to provide an emulsified composition that is free from stickiness and squeaky feeling, and has excellent skin compatibility, moisturizing properties, and emulsification stability. [Modes for carrying out the invention]

[0009] The embodiments of this disclosure will be described in detail below. However, the embodiments are not limited to the following description and can be modified as appropriate without departing from the gist of this disclosure. Furthermore, in this specification, the "~" indicating a numerical range means that the numbers before and after it are included as the lower and upper limits, respectively, unless otherwise specified.

[0010] (Emulsified composition) An emulsified composition according to one embodiment contains (A) niacin or a derivative thereof in an amount of 1% to 10% by mass, (B) phospholipid or a derivative thereof, (C) stearyl glycyrrhetinate in an amount of 0.06% to 3% by mass, (D) oil, and (E) water. The emulsified composition according to one embodiment preferably further contains (F1) at least one of an acrylic acid / alkyl methacrylate copolymer and (F2) (sodium acrylate / sodium acryloyldimethyl taurate) copolymer, (G) carbomer, (H) trimethylglycine, etc., and may further contain other components as needed.

[0011] The inventors of the present invention discovered that, in order to improve the undesirable feel of conventional oil-in-water emulsion compositions containing niacin or its derivatives, adding stearyl glycyrrhetinate, which is known for its whitening effect, improved the stickiness but also resulted in poor absorption into the skin and a squeaky feeling. In contrast, the inventors found that by setting the amounts of niacin or its derivatives and stearyl glycyrrhetinate in an emulsion composition containing oil and water to specific amounts, and further adding phospholipids or their derivatives, the stickiness and squeaky feeling can be improved, and the composition also exhibits excellent absorption into the skin, a moist feeling, and emulsion stability.

[0012] <(A) Niacin or its derivatives> An emulsified composition according to one embodiment contains niacin or a derivative thereof (hereinafter sometimes referred to as "component (A)"). Component (A) is an active ingredient for improving blemishes and wrinkles.

[0013] Niacin is a general term for niacin (nicotinic acid) and niacinamide (nicotinic acid amide). There are no particular restrictions on niacin derivatives, and they can be appropriately selected depending on the purpose. For example, nicotinic acid esters are used. Examples of nicotinic acid esters include benzyl nicotinate, tocopherol nicotinate, methyl nicotinate, ethyl nicotinate, and β-butoxy nicotinate. These may be used individually or in combination of two or more. Among these, nicotinic acid amide is preferred as component (A).

[0014] Niacin is a water-soluble vitamin and is widely known as one of the B vitamins. Niacin can be obtained by extraction from natural materials such as rice bran using known methods, or by synthesis using known methods. For example, niacin listed in the 18th edition of the Japanese Pharmacopoeia can be used. Commercially available niacin can also be used.

[0015] Niacin derivatives can be obtained by synthesizing them from niacin obtained by the above method using known methods. Alternatively, commercially available niacin derivatives may be used.

[0016] In the emulsified composition according to one embodiment, the content of component (A) is 1% to 10% by mass of the total mass of the emulsified composition, preferably 2% to 9% by mass, and more preferably 3% to 5% by mass, in terms of non-stickiness and good compatibility. In the emulsified composition according to one embodiment, if the content of component (A) exceeds 10% by mass, stickiness occurs. Furthermore, in the emulsified composition according to one embodiment, even if component (A) is added in excess of 10% by mass, a significant effect commensurate with the increase may not be obtained.

[0017] (B) Phospholipids or their derivatives An emulsified composition according to one embodiment contains a phospholipid or a derivative thereof (hereinafter sometimes referred to as "component (B)").

[0018] (B) There are no particular restrictions on the phospholipid as component (B), and it can be appropriately selected depending on the purpose. Examples include natural phospholipids, synthetic phospholipids, and hydrogenated phospholipids in which the unsaturated carbon chain of naturally derived phospholipids is saturated with hydrogen. Examples of phospholipid derivatives as component (B) include lysolecithin obtained by hydrolyzing lecithin with acid, enzymes, or other methods. These may be used individually or in combination of two or more.

[0019] Examples of natural phospholipids include phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidylinositol, lysophosphatidylcholine, sphingomyelin, egg yolk lecithin, and soy lecithin.

[0020] Examples of synthetic phospholipids include dilauroyl phosphatidylcholine, dimyristoyl phosphatidylcholine, dipalmitoyl phosphatidylcholine, distearoyl phosphatidylcholine, dioleoyl phosphatidylcholine, palmitoyl oleoyl phosphatidylcholine, and the like.

[0021] Examples of hydrogenated phospholipids (sometimes referred to as "hydrogenated lecithin") include hydrogenated soy lecithin, hydrogenated egg yolk lecithin, hydrogenated phosphatidylcholine, hydrogenated phosphatidylserine, and the like.

[0022] Among these, as the component (B), hydrogenated lecithin is preferred from the viewpoint of emulsion stability.

[0023] The component (B) may be appropriately synthesized by a known method or a commercially available product may be used.

[0024] In the emulsion composition according to one embodiment, the content of the component (B) is not particularly limited and can be appropriately selected according to the purpose. However, it is preferably 0.05% by mass to 3% by mass, and more preferably 0.2% by mass to 1.0% by mass, based on the total mass of the emulsion composition. In the emulsion composition according to one embodiment, when the content of the component (B) is 0.05% by mass or more, the absence of squeak and good familiarity are achieved. Also, in the emulsion composition according to one embodiment, when the content of the component (B) is 3% by mass or less, the absence of squeak is good.

[0025] <Stearyl Glycyrrhetinate> The emulsion composition according to one embodiment contains stearyl glycyrrhetinate (hereinafter sometimes referred to as "component (C)").

[0026] Stearyl glycyrrhetinate is a compound in which stearic acid is ester-bonded to the hydroxyl group of glycyrrhetinic acid.

[0027] (C) Component may be synthesized by known methods as appropriate, or a commercially available product may be used. When synthesizing component (C), for example, Licorice (Fabaceae) Glycyrrhiza Glabra One method involves hydrolyzing glycyrrhetinic acid obtained from plants such as ).

[0028] In the emulsified composition according to one embodiment, the content of component (C) is 0.06% to 3% by mass relative to the total mass of the emulsified composition, preferably 0.1% to 1% by mass, and more preferably 0.1% to 0.7% by mass, in terms of non-stickiness and good compatibility. In the emulsified composition according to one embodiment, if the content of component (C) exceeds 3% by mass, stickiness occurs. Furthermore, in the emulsified composition according to one embodiment, even if component (C) is added in excess to more than 3% by mass, a significant effect commensurate with the increase may not be obtained.

[0029] -Mass ratio [(A) / (C)]- The mass ratio [(A) / (C)] of (A) niacin or its derivative content to (C) stearyl glycyrrhetinate content is not particularly limited and can be appropriately selected depending on the purpose, but 0.3 to 167.0 is preferred, 1.0 to 50.0 is more preferred in terms of non-stickiness, 5.0 to 45.0 is even more preferred in terms of good compatibility, and 10.0 to 45.0 is particularly preferred. When the mass ratio [(A) / (C)] is 0.3 to 167.0, the non-stickiness is good.

[0030] <(D) Oil content> There are no particular restrictions on the oil component (hereinafter sometimes referred to as "component (D)"), and it can be appropriately selected depending on the purpose. Examples include liquid oils and fats, solid oils and fats, waxes, hydrocarbon oils, higher fatty acids, silicone oils, and ester oils.

[0031] <<Liquid fat>> 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.

[0032] <<Solid fats and oils>> 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.

[0033] <<Waxes>> 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, polyoxyethylene lanolin alcohol ether, polyoxyethylene lanolin alcohol acetate, polyoxyethylene cholesterol ether, lanolin fatty acid polyethylene glycol, and polyoxyethylene hydrogenated lanolin alcohol ether.

[0034] <<Hydrogen oil>> Examples of hydrocarbon oils include liquid paraffin, ozokerite, squalane, pristane, paraffin, isododecane, ceresin, squalene, squalane, petrolatum, microcrystalline wax, olefin oligomer, hydrogenated polydecene, hydrogenated palm oil, and hydrogenated macadamia nut oil.

[0035] <<Higher fatty acids>> 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).

[0036] <<Silicone oil>> Examples of silicone oils include linear polysiloxanes such as dimethylpolysiloxane (also called "dimethicone"), methylphenylpolysiloxane, and diphenylpolysiloxane; cyclic polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane; and various modified polysiloxanes such as amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, and fluorine-modified polysiloxane.

[0037] <<Ester oil>> Examples of ester oils include glyceryl tri-2-ethylhexanoate (glyceryl triisooctanoate), pentaerythrist tetra-2-ethylhexanoate (pentaerythrist tetraoctanoate), glyceryl triisopalmitate, octyl isopalmitate, isopropyl isostearate, isostearyl isostearate, isocetyl isostearate, hexyl isostearate, myristyl isostearate, isocetyl octanoate, cetyl isooctanoate, isostearyl octanoate, isodecyl isononanoate, octyldodecyl dimethyloctanoate, oleyl myristate, isostearyl erucate, isocetyl stearate, and octyl stearate. Examples include isostearyl palmitate, isocetyl palmitate, octyl palmitate, isostearyl myristate, isocetyl myristate, octyldodecyl myristate, decyl myristate, isopropyl palmitate, isopropyl myristate, trimethylolpropane triisostearate, neopentyl glycol dicaprate, dioctyl sebacate, octyldodecyl 12-stearoyloxystearate, dioctyldodecyl stearoyl glutamate, dioctyl adipate, diisostearyl malate, octyl methoxycinnamate, octyldodecyl lactate, isostearyl lactate, and octyl paradimethylaminobenzoate.

[0038] Component (D) may be one of these oils used alone or two or more used in combination. Among these, component (D) preferably contains hydrocarbon oil, and more preferably contains isododecane and squalane.

[0039] Component (D) may be synthesized using known methods or a commercially available product.

[0040] There are no particular restrictions on the content of component (D) in the emulsified composition according to one embodiment, and it can be appropriately selected depending on the purpose, but it is preferably 1% to 20% by mass, and more preferably 3% to 10% by mass, relative to the total mass of the emulsified composition. When the content of component (D) in the emulsified composition according to one embodiment is 1% by mass or more, the moist feeling is improved. Furthermore, when the content of component (D) in the emulsified composition according to one embodiment is 20% by mass or less, stickiness is less likely to occur and the emulsification stability is good.

[0041] <(E)Water> There are no particular restrictions on the water (hereinafter sometimes referred to as "(E) component"), and water used in cosmetics and quasi-drugs may be used, such as ion-exchanged water, distilled water, ultrapure water, and tap water.

[0042] The emulsified composition according to one embodiment is preferably an oil-in-water emulsion composition. When the emulsified composition according to one embodiment is an oil-in-water emulsion composition, component (E) constitutes the aqueous phase of the oil-in-water emulsion composition and is a continuous phase.

[0043] Therefore, there are no particular restrictions on the content of component (E) in the emulsified composition according to one embodiment, and it can be appropriately selected according to the purpose, and it can be included as the remainder after blending components (A), (B), (C), and (D), and other components as needed. For this reason, the lower limit of the content of component (E) in the emulsified composition according to one embodiment can be, for example, 50% by mass or more, 60% by mass or more, 70% by mass or more, etc., based on the total mass of the emulsified composition. The upper limit of the content of component (E) in the emulsified composition according to one embodiment can be, for example, 95% by mass or less, 90% by mass or less, 85% by mass or less, etc., based on the total mass of the emulsified composition. The lower limit and upper limit of the content of component (E) in the emulsified composition according to one embodiment can be appropriately combined, for example, 50% by mass to 95% by mass, 60% by mass or more to 90% by mass, 70% by mass to 85% by mass, etc.

[0044] <(F1) Acrylic acid / alkyl methacrylate copolymer or (F2) (Sodium acrylate / sodium acryloyldimethyl taurate) copolymer> An emulsified composition according to one embodiment may contain at least one of an acrylic acid / alkyl methacrylate copolymer (hereinafter sometimes referred to as "component (F1)") and a (sodium acrylate / sodium acryloyldimethyl taurate) copolymer (hereinafter sometimes referred to as "component (F2)"). An emulsified composition according to one embodiment is preferable in terms of compatibility if it further contains at least one of component (F1) and component (F2), and more preferable if it contains component (F1) or component (F2).

[0045] <<(F1) Acrylic acid / alkyl methacrylate copolymer>> Component (F1) is a polymer in which at least a portion of the carboxyl groups of a polymer with acrylic acid or methacrylic acid as the main chain are esterified with an alkyl group, and it is preferable that it is a crosspolymer in which polymers or copolymers containing alkyl acrylate or alkyl methacrylate as polymerization units are crosslinked with each other.

[0046] In component (F1), the alkyl group linked by the ester bond may be linear or branched.

[0047] Furthermore, in component (F1), there are no particular restrictions on the number of carbon atoms of the alkyl group bonded by the ester bond, and it can be appropriately selected depending on the purpose, but it is preferably 10 to 30.

[0048] A specific example of component (F1) is acrylates / alkyl (C10-30) acrylate crosspolymer.

[0049] The (F1) component may be synthesized appropriately by known methods, or a commercially available product may be used.

[0050] Examples of commercially available products containing component (F1) include acrylates / alkyl acrylate (C10-30) crosspolymers such as Carbopol (registered trademark) 1342, PEMULEN TR-1, and PEMULEN TR-2 (all manufactured by Lubrizol).

[0051] There are no particular restrictions on the content of component (F1) in the emulsified composition according to one embodiment, and it can be appropriately selected according to the purpose, but it is preferably 0.04% to 1.5% by mass, more preferably 0.05% to 1.0% by mass, and even more preferably 0.1% to 0.5% by mass, relative to the total mass of the emulsified composition. When the content of component (F1) in the emulsified composition according to one embodiment is 0.04% to 1.5% by mass, the moist feeling and blendability are good.

[0052] -Mass ratio [(F1) / (B)]- The mass ratio [(F1) / (B)] of the content of (F1) acrylic acid / alkyl methacrylate copolymer to the content of (B) phospholipid or its derivative is not particularly limited and can be appropriately selected depending on the purpose, but 0.2 to 1.5 is preferred, 0.3 to 1.2 is more preferred, and 0.5 to 1.2 is even more preferred in terms of moisturizing effect. When the mass ratio [(F1) / (B)] is 0.2 to 1.5, the moisturizing effect is good.

[0053] <<(F2)(Sodium Acrylate / Sodium Acryloyldimethyl Taurate) Copolymer>> Component (F2) is a copolymer of hydroxyethyl acrylate and sodium acrylic dimethyl taurate.

[0054] The (F2) component may be synthesized appropriately by known methods, or a commercially available product may be used.

[0055] A commercially available product containing component (F2) is, for example, Simulgel EG (SEPPIC).

[0056] The content of component (F2) in the emulsified composition according to one embodiment is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.04% to 1.5% by mass, more preferably 0.05% to 1.0% by mass, and even more preferably 0.1% to 0.3% by mass, relative to the total mass of the emulsified composition. If the content of component (F1) in the emulsified composition according to one embodiment is 0.04% by mass or more, a good moist feeling is obtained. Also, if the content of component (F1) in the emulsified composition according to one embodiment is 1.5% by mass or less, good blendability is obtained.

[0057] -Mass ratio [(F2) / (B)]- The mass ratio [(F2) / (B)] of the content of (F2)(sodium acrylate / sodium acryloyldimethyl taurate) copolymer to the content of (B)phospholipid or its derivative is not particularly limited and can be appropriately selected depending on the purpose, but 0.02 to 15.00 is preferred, 0.05 to 15.00 is more preferred, 0.05 to 13.00 is even more preferred, 0.10 to 5.00 is even more preferred, and 0.10 to 0.50 is particularly preferred. When the mass ratio [(F2) / (B)] is 0.02 to 15.00, a good moist feeling is obtained.

[0058] <(G) Carbomer> The emulsified composition according to one embodiment may contain carbomer (hereinafter sometimes referred to as "component (G)"). The emulsified composition according to one embodiment is preferable in that it can further contain component (G) in that it can further improve the moisturizing effect.

[0059] The content of component (G) in the emulsified composition according to one embodiment is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.01% to 0.3% by mass, and more preferably 0.05% to 0.2% by mass, relative to the total mass of the emulsified composition. When the content of component (G) in the emulsified composition according to one embodiment is 0.01% to 0.3% by mass, a good moist feeling is obtained.

[0060] <(H) Trimethylglycine> The emulsified composition according to one embodiment may contain trimethylglycine (hereinafter sometimes referred to as "component (H)"). The emulsified composition according to one embodiment is preferable in that it can further contain component (H) in that it can further improve the moisturizing effect.

[0061] There are no particular restrictions on the content of component (H) in the emulsified composition according to one embodiment, and it can be appropriately selected depending on the purpose, but it is preferably 0.3% to 7% by mass, and more preferably 1% to 5% by mass, relative to the total mass of the emulsified composition. When the content of component (H) in the emulsified composition according to one embodiment is 0.3% to 7% by mass, a good moist feeling is obtained.

[0062] <Other ingredients> An emulsified composition according to one embodiment may contain other components other than components (A), (B), (C), (D), (E), (F1), (F2), (G), and (H). There are no particular restrictions on the other components, and they can be appropriately selected from known components used in cosmetics. Examples include glycols, glycerins, sugar alcohols, sugars, powders, pigments, dyes, polymers other than component (G), solvents other than component (E), pH adjusters, surfactants other than component (B), fragrances, and agents other than components (A) and (C). These may be used individually or in combination of two or more.

[0063] In the emulsified composition according to one embodiment, there are no particular restrictions on the content of other components, as long as they do not impair the effect of the emulsified composition, and they can be appropriately selected according to the purpose.

[0064] <<Glycols>> Examples of glycols include propylene glycol, dipropylene glycol (DPG), 1,3-butylene glycol (BG), 1,4-butylene glycol, diethylene glycol, triethylene glycol, and polyethylene glycol.

[0065] <<Glycerin-based products>> Examples of glycerin compounds include glycerin, diglycerin, and polyglycerin.

[0066] <<Sugar alcohols>> Examples of sugar alcohols include sorbitol, mannitol, maltitol, xylitol, and erythritol.

[0067] <<Sugars>> Examples of sugars include fructose, glucose, galactose, maltose, lactose, and trehalose.

[0068] <<Powder>> The powder may be an inorganic powder or an organic powder.

[0069] Examples of inorganic powders include mica, talc, kaolin, sericite, muscovite, phlogopite, synthetic mica, rose mica, biotite, thiamite, synthetic mica, anhydrous silicic acid (silica), aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, aluminum oxide, barium sulfate, zeolite, titanium dioxide, zinc oxide, and boron nitride.

[0070] Examples of organic powders include polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, calcium carbonate powder, magnesium carbonate powder, styrene-acrylic acid copolymer resin powder, and cellulose powder.

[0071] <<Pigment>> Examples of pigments include inorganic pigments, organic pigments, pearl pigments, and metal powder pigments.

[0072] Examples of inorganic pigments include inorganic white pigments such as titanium dioxide and zinc oxide; inorganic red pigments such as iron oxide (red iron oxide); inorganic yellow pigments such as yellow iron oxide and yellow ochre; black pigments such as black iron oxide and carbon black; inorganic green pigments such as chromium oxide, chromium hydroxide, and cobalt titanate; and inorganic blue pigments such as ultramarine and Prussian blue.

[0073] Examples of organic pigments include Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Yellow No. 205, Yellow No. 401, Blue No. 1, Blue No. 404, Green No. 3, and their zirconium lake, barium lake, or aluminum lake forms.

[0074] Examples of pearl pigments include titanium dioxide-coated mica, colored titanium dioxide-coated mica, bismuth oxychloride, and fish scale foil.

[0075] Examples of metal powder pigments include aluminum powder and copper powder.

[0076] <<Dye>> Examples of pigments include natural pigments such as chlorophyll and beta-carotene.

[0077] <<(G) Polymers other than component>> Examples of polymers include plant-derived polymers, animal-derived polymers, microbial-derived polymers, starch-derived polymers, cellulose-derived polymers, alginate-derived polymers, vinyl-derived polymers, acrylic polymers, and inorganic water-soluble polymers. These polymers can act as thickeners.

[0078] Examples of plant-derived polymers include gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, gellan gum, carrageenan, pectin, and agar.

[0079] Examples of animal-derived polymers include collagen, casein, albumin, and gelatin.

[0080] Examples of microbial polymers include xanthan gum, dextran, succinoglucan, and pullulan.

[0081] Examples of starch-based polymers include plant starches such as corn, wheat, potatoes, and rice; carboxymethyl starch; and methylhydroxypropyl starch.

[0082] Examples of cellulose-based polymers include methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, hydroxypropylcellulose, sodium carboxymethylcellulose, and crystalline cellulose.

[0083] Examples of alginate-based polymers include sodium alginate and propylene glycol alginate.

[0084] Examples of vinyl polymers include polyvinyl alcohol, polyvinyl acetate, polyvinyl methyl ether, polyvinylpyrrolidone, and copolymers of vinylpyrrolidone and vinyl acetate.

[0085] Examples of acrylic polymers include sodium polyacrylate, polyethyl acrylate, polyacrylate alkanolamine, alkyl methacrylate and dimethylaminoethyl methacrylate copolymer, poly2-acrylamido-2-methylpropanesulfonic acid, and polymethacryloyloxytrimethylammonium.

[0086] Examples of inorganic water-soluble polymers include polyethyleneimine, cationic polymers, bentonite, aluminum magnesium silicate, laponite, hectorite, and silicic anhydride.

[0087] <<Solvent other than component (E)>> Examples of solvents other than component (E) include lower alcohols. Examples of lower alcohols include alcohols having 5 or less carbon atoms. Specific examples of lower alcohols include methanol, ethanol, propyl alcohol, isopropyl alcohol, 2-amino-2-methyl-1-propanol, and 2-amino-2-methyl-1,3-propanediol.

[0088] <<pH adjuster>> Examples of pH adjusters include potassium hydroxide, sodium hydroxide, triethanolamine, sodium carbonate, lactic acid, citric acid, sodium citrate, glycolic acid, succinic acid, tartaric acid, malic acid, sodium hydrogen carbonate, and ammonium hydrogen carbonate.

[0089] <<Surfactant other than component (B)>> Examples of surfactants other than component (B) include anionic surfactants, cationic surfactants, nonionic surfactants, and amphoteric surfactants.

[0090] <<Agent other than component (A) and component (C)>> Examples of agents other than component (A) and component (C) include salt-type agents, vitamins other than component (A), ultraviolet absorbers, chelating agents, preservatives, plant extracts, moisturizing agents, anti-inflammatory agents, cooling agents, amino acids, antioxidants, and bactericides.

[0091] - Salt-type agent - Salt-type drugs refer to water-soluble drugs capable of forming salts. There are no particular restrictions on salt-type drugs as long as they are water-soluble drugs that can be commonly incorporated into cosmetics, and they can be appropriately selected according to the purpose. Examples include salts of L-ascorbic acid or its derivatives, salts of tranexamic acid or its derivatives, salts of alkoxysalicylic acid or its derivatives, and salts of glutathione or its derivatives.

[0092] L-ascorbic acid, commonly known as vitamin C, possesses strong reducing properties that promote cell respiration, enzyme activation, collagen formation, and melanin reduction. Examples of L-ascorbic acid derivatives include L-ascorbic acid monoesters such as L-ascorbic acid monophosphate and L-ascorbic acid 2-sulfate; L-ascorbic acid triesters such as L-ascorbic acid triphosphate; and L-ascorbic acid glucosides such as L-ascorbic acid 2-glucoside.

[0093] Examples of tranexamic acid derivatives include tranexamic acid dimers such as trans-4-(trans-aminomethylcyclohexanecarbonyl)aminomethylcyclohexanecarboxylic acid hydrochloride; esters of tranexamic acid and hydroquinone such as 4'-hydroxyphenyl ester of 4-(trans-aminomethylcyclohexanecarboxylic acid); esters of tranexamic acid and gentisic acid such as 2-(trans-4-aminomethylcyclohexylcarbonyloxy)-5-hydroxybenzoic acid; and amides of tranexamic acid such as trans-4-aminomethylcyclohexanecarboxylic acid methylamide, trans-4-(p-methoxybenzoyl)aminomethylcyclohexanecarboxylic acid, and trans-4-guanidinomethylcyclohexanecarboxylic acid.

[0094] Alkoxysalicylic acids are, for example, salicylic acid in which the hydrogen atoms at the 3rd, 4th, or 5th position are substituted with an alkoxy group. The alkoxy group substituent is preferably a methoxy group, ethoxy group, propoxy group, isopropoxy group, butoxy group, or isobutoxy group, with methoxy or ethoxy group being more preferred. Specific examples of alkoxysalicylic acids include 3-methoxysalicylic acid, 3-ethoxysalicylic acid, 4-methoxysalicylic acid, 4-ethoxysalicylic acid, 4-propoxysalicylic acid, 4-isopropoxysalicylic acid, 4-butoxysalicylic acid, 5-methoxysalicylic acid, 5-ethoxysalicylic acid, and 5-propoxysalicylic acid.

[0095] There are no particular restrictions on the type of salt used for the drug; examples include alkali metal salts or alkaline earth metal salts such as sodium salts, potassium salts, and calcium salts; ammonium salts; and amino acid salts.

[0096] -(A) Vitamins other than component- Examples of vitamins other than component (A) include water-soluble vitamins such as vitamin B6 hydrochloride, pantothenyl ethyl ether, pyridoxine hydrochloride, nicotinamide, pantothenic acid, and biotin.

[0097] - UV absorber - Examples of UV absorbers include benzoic acid-based UV absorbers such as para-aminobenzoic acid; anthranilic acid-based UV absorbers such as methyl anthranilate; salicylic acid-based UV absorbers such as octyl salicylate; cinnamic acid-based UV absorbers such as isopropyl para-methoxycinnamate and octyl para-methoxycinnamate; UV absorbers such as urocanic acid and ethyl urocanate; benzophenone-based UV absorbers such as 2-hydroxy-4-methoxybenzophenone and dihydroxybenzophenone; benzotriazole-based UV absorbers; and 2-phenylbenzimidazole-5-sulfonic acid.

[0098] -Chelating agent- Examples of chelating agents include citramalic acid, agalic acid, glyceric acid, shikimic acid, hinokitiol, gallic acid, tannic acid, caffeic acid, ethylenediamine-N,N,N',N'-tetraacetic acid trisodium salt trihydrate (EDTA-3Na), ethylene glycoldiaminetetraacetic acid, diethylenetriaminepentaacetic acid, phytic acid, polyphosphate, metaphosphate, their analogues, their alkali metal salts, and their carboxylic acid esters.

[0099] - Preservatives - Examples of preservatives include benzoic acid, salicylic acid, parahydroxybenzoic acid esters (methylparaben, ethylparaben, butylparaben, etc.), sorbic acid, parachlormethacresol, hexachlorophene, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, photosensitizer, and phenoxyethanol.

[0100] -Plant extract- Examples of plant extracts include Houttuynia cordata extract, Phellodendron amurense extract, Licorice extract, Peony extract, Paeonia suffruticosa extract, Luffa gourd extract, Saxifraga stolonifera extract, Eucalyptus extract, Clove extract, Horse chestnut extract, Cornflower extract, Seaweed extract, and Thyme extract.

[0101] -Moisturizer- Examples of humectants include polyethylene glycol (PEG), sodium chondroitin sulfate, sodium hyaluronate, sodium lactate, glucosamine, cyclodextrin, and polyoxyethylene methyl glucoside (methyl gluceth-10). Furthermore, the glycols, glycerins, sugar alcohols, and sugars can also be used as humectants.

[0102] -Anti-inflammatory drugs- Examples of anti-inflammatory agents include azulene, glycyrrhizin, lysozyme chloride, pyridoxine hydrochloride, and sulfur.

[0103] -Cooling agent- Examples of cooling agents include L-menthol and camphor.

[0104] -Antioxidant- Examples of antioxidants include ascorbic acid, α-tocopherol, and carotenoids.

[0105] [Dosage form] The dosage form of the emulsified composition according to one embodiment is not particularly limited and can be appropriately selected depending on the purpose, but it is more preferably a liquid emulsified composition, and even more preferably an oil-in-water emulsified composition.

[0106] The product form of the emulsified composition according to one embodiment is not particularly limited and can be appropriately selected according to the purpose. Examples include cosmetics for skincare purposes such as lotions, creams, emulsions, and serums; makeup cosmetics such as foundations and makeup bases; sunscreen cosmetics; suntan cosmetics; skin cleansing cosmetics such as facial cleansers and makeup removers; and ointments. The product form of the cosmetic according to one embodiment may also be in the form of impregnating a base material such as a pack. Among these, the product form of the emulsified composition according to one embodiment is preferably an emulsion because it does not feel sticky or squeaky, and is excellent in terms of skin compatibility, moisturizing effect, and emulsification stability.

[0107] [viscosity] The viscosity of the emulsified composition according to one embodiment at 30°C is not particularly limited and can be appropriately selected depending on the purpose, but when used as a liquid cosmetic, 1,000 mPa·s to 10,000 mPa·s is preferred, and 1,500 mPa·s to 5,000 mPa·s is more preferred. The viscosity of the emulsified composition according to one embodiment can be measured, for example, using a B-type viscometer at 30°C under the conditions of rotor No. 3, rotation speed of 30 rpm, and for 1 minute.

[0108] [pH] The pH of the emulsified composition according to one embodiment is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoint of application to the skin, it is preferably 5 to 8.

[0109] [Manufacturing method] There are no particular limitations on the method for producing the emulsified composition according to one embodiment, and it is preferably produced according to a method commonly used for oil-in-water emulsion compositions. For example, one method involves heating and dissolving an aqueous component and mixing it uniformly, then adding an oily component that has been similarly heated, dissolved, and mixed uniformly, and mixing to emulsify it.

[0110] There are no particular restrictions on the heating temperature of the aqueous and oil phase components, and they can be appropriately selected depending on the purpose, but 70°C to 80°C is preferred.

[0111] There are no particular restrictions on the emulsification method, and known methods can be used. Examples include mechanical emulsification using high-pressure emulsifiers such as high-pressure homogenizers, high-shear dispersers, and colloid mills; phase inversion emulsification; coagulation; liquid crystal emulsification; and D-phase emulsification. These methods can be used individually or in combination.

[0112] A specific example of a method for producing an emulsified composition according to one embodiment is to first prepare an aqueous phase by dissolving water-soluble components appropriately selected from components (A) and (B), and optionally components (F1), (F2), (G), (H), and other components, in water component (E) in the water. Next, water-insoluble components appropriately selected from components (C) and (D), and optionally other components, are mixed to prepare an oil phase. Finally, the oil phase is added to the aqueous phase and stirred to produce a cosmetic composition according to one embodiment. [Examples]

[0113] The embodiments will be described in more detail below with reference to examples and comparative examples, but the embodiments are not limited to these examples and comparative examples. In the examples and comparative examples, unless otherwise specified, the amounts are expressed as "mass%" relative to the total mass of the emulsified composition, and all values ​​are converted to pure content. Furthermore, the mass ratio of the content of component (A) (mass%) to the content of component (C) [(A) / (C)] and the mass ratio of the content of component (F1) (mass%) to the content of component (B) [(F1) / (B)] have been rounded to one decimal place by rounding to the second decimal place. Furthermore, the mass ratio of the content of component (F2) (mass%) to the content of component (B) [(F2) / (B)] have been rounded to two decimal places by rounding to the third decimal place.

[0114] (Examples 1-17 and Comparative Examples 1-3) Oil-in-water emulsion compositions (emulsions) with the compositions and content (mass%) shown in Tables 1 to 4 were prepared by conventional methods.

[0115] <Rating> Each oil-in-water emulsion composition prepared in Examples 1-17 and Comparative Examples 1-3 was evaluated for "non-stickiness," "good blendability," "non-squeakiness," "moisture," and "emulsification stability" using the following methods. The evaluation results are shown in Tables 1-4.

[0116] <<No stickiness>> The non-greasy feel of each oil-in-water emulsion composition in Examples 1-17 and Comparative Examples 1-3 was evaluated using the following method. Three expert evaluators confirmed the non-greasy feel of each oil-in-water emulsion composition in Examples 1-17 and Comparative Examples 1-3 when applied to the skin, and evaluated them based on the evaluation criteria below. A result of A, B, or C was considered a pass. [Scoring and evaluation criteria for non-stickiness] 5 points: I strongly feel that it's "not slimy." 4 points: I strongly felt that it wasn't sticky. 3 points: I feel that it's not sticky. 2 points: I feel it's slightly less sticky. 1 point: I don't feel any "slipperiness." [Criteria for determining non-stickiness] A: The average score is between 4.5 and 5.0. B: Average score is between 4.0 and 4.5 points. C: Average score is between 3.5 and 4.0 points. D: Average score is between 3.0 and 3.5 points. E: The average score is less than 3.0 points.

[0117] <<Ease of use>> The blendability of each oil-in-water emulsion composition in Examples 1-17 and Comparative Examples 1-3 was evaluated using the following method. Three expert evaluators confirmed the blendability of each oil-in-water emulsion composition in Examples 1-17 and Comparative Examples 1-3 when applied to the skin, and evaluated them based on the evaluation criteria below. A result of A, B, or C was considered a pass. [Scoring and evaluation criteria for ease of use] 5 points: I feel a very strong sense of familiarity. 4 points: I strongly feel a sense of familiarity. 3 points: I feel a sense of familiarity. 2 points: I feel a slight sense of familiarity. 1 point: I don't feel a sense of familiarity. [Criteria for determining familiarity] A: The average score is between 4.5 and 5.0. B: Average score is between 4.0 and 4.5 points. C: Average score is between 3.5 and 4.0 points. D: Average score is between 3.0 and 3.5 points. E: The average score is less than 3.0 points.

[0118] <<No creaking>> The lack of squeaky texture in each oil-in-water emulsion composition of Examples 1-17 and Comparative Examples 1-3 was evaluated using the following method. Three expert evaluators confirmed the lack of squeaky texture when each oil-in-water emulsion composition of Examples 1-17 and Comparative Examples 1-3 was applied to the skin and evaluated it based on the evaluation criteria below. A result of A, B, or C was considered a pass. [Scoring and evaluation criteria for lack of creaking] 5 points: I strongly feel the lack of creaking. 4 points: I strongly feel the lack of creaking. 3 points: I feel that it's "smooth and responsive." 2 points: I feel a slight lack of "creak". 1 point: I don't feel any "squeakiness". [Criteria for determining the absence of creaking] A: The average score is between 4.5 and 5.0. B: Average score is between 4.0 and 4.5 points. C: Average score is between 3.5 and 4.0 points. D: Average score is between 3.0 and 3.5 points. E: The average score is less than 3.0 points.

[0119] <<Moisturizing feel>> The moisturizing effect of each oil-in-water emulsion composition in Examples 1-17 and Comparative Examples 1-3 was evaluated using the following method. Three expert evaluators applied each oil-in-water emulsion composition in Examples 1-17 and Comparative Examples 1-3 to the skin and confirmed the moisturizing effect, evaluating them based on the following evaluation criteria. A result of A, B, or C was considered a pass. [Scoring and evaluation criteria for moisturizing effect] 5 points: I feel a very strong sense of "moisture." 4 points: I strongly feel the "moisturizing effect". 3 points: I feel a "moisturizing" sensation. Points 2: I feel a slight "moisture" sensation. 1 point: Does not feel moisturizing. [Criteria for judging moistness] A: The average score is between 4.5 and 5.0. B: Average score is between 4.0 and 4.5 points. C: Average score is between 3.5 and 4.0 points. D: Average score is between 3.0 and 3.5 points. E: The average score is less than 3.0 points.

[0120] <<Emulsion stability>> Immediately after preparing each oil-in-water emulsion composition for Examples 1-17 and Comparative Examples 1-3, one expert evaluator observed the initial appearance and particle state visually and under a microscope. Each oil-in-water emulsion composition was then left to stand at room temperature (25°C ± 5°C) for 24 hours. Afterward, one expert evaluator observed the appearance and particle state visually and under a microscope and evaluated it based on the following evaluation criteria. A result of A or B was considered a pass. [Criteria for determining emulsification stability] A: Even after 24 hours, no significant changes were observed in the particle shape of the emulsion particles under microscopic observation. B: After 24 hours, aggregation of emulsion particles was observed under microscopic observation. C: After 24 hours, separation of the oil-in-water emulsion composition was observed visually.

[0121] [Table 1]

[0122] [Table 2]

[0123] [Table 3]

[0124] [Table 4]

[0125] Examples of the types of disclosures include the following:

[0126] <1> (A) Niacin or its derivative in an amount of 1% to 10% by mass, (B) Phospholipids or their derivatives, (C) Stearyl glycyrrhetinate in an amount of 0.06% to 3% by mass, (D) Oil and, (E) Water and, It is an emulsified composition containing [a specific ingredient]. <2> The mass ratio [(A) / (C)] of the content of (A) niacin or its derivative to the content of (C) stearyl glycyrrhetinate is 0.3 to 167.0. <1> This is the emulsified composition described above. <3> The above contains at least one of (F1) an acrylic acid / alkyl methacrylate copolymer and (F2) a (sodium acrylate / sodium acryloyldimethyl taurate) copolymer. <1> or <2> This is the emulsified composition described above. <4> The content of the (F1) acrylic acid / alkyl methacrylate copolymer is 0.04% by mass to 1.5% by mass, <3> This is the emulsified composition described above. <5> The mass ratio [(F1) / (B)] of the content of the (F1) acrylic acid / alkyl methacrylate copolymer to the content of the (B) phospholipid or its derivative is 0.2 to 1.5. <3> or <4> This is the emulsified composition described above. <6> The content of the (F2)(sodium acrylate / sodium acryloyldimethyl taurate) copolymer is 0.04% by mass to 1.5% by mass, <3> from <5> The emulsified composition is one of the following: <7> The mass ratio [(F2) / (B)] of the content of the (F2) (sodium acrylate / sodium acryloyldimethyl taurate) copolymer to the content of the (B) phospholipid or its derivative is 0.02 to 15.00. <3> from <6> The emulsified composition is one of the following: <8> (G) The above, containing carbomer <1> from <7> The emulsified composition is one of the following: <9> The content of (G) carbomer is 0.01% by mass to 0.3% by mass, <8> This is the emulsified composition described above. <10> (H) Trimethylglycine, the above <1> from <9> The emulsified composition is one of the following. <11> The content of (H) trimethylglycine is 0.3% by mass to 7% by mass, <10> This is the emulsified composition described above.

[0127] As described above, this disclosure has been explained based on specific embodiments and examples, but these embodiments and examples are merely presented as examples, and this disclosure is not limited to the above embodiments and examples. The above embodiments can be implemented in various other forms, and various combinations, omissions, substitutions, additions, modifications, etc., are possible without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents.

Claims

1. (A) Niacin or its derivative in an amount of 1% to 10% by mass, (B) Phospholipids or their derivatives, (C) Stearyl glycyrrhetinate in an amount of 0.06% to 3% by mass, (D) Oil and, (E) Water and, An emulsified composition containing [a specific ingredient].

2. The emulsified composition according to claim 1, wherein the mass ratio [(A) / (C)] of the content of (A) niacin or its derivative to the content of (C) stearyl glycyrrhetinate is 0.3 to 167.

0.

3. The emulsifying composition according to claim 1, comprising (F1) an acrylic acid / alkyl methacrylate copolymer and (F2) a (sodium acrylate / sodium acryloyldimethyl taurate) copolymer.

4. The emulsified composition according to claim 3, wherein the content of the (F1) acrylic acid / alkyl methacrylate copolymer is 0.04% by mass to 1.5% by mass.

5. The emulsified composition according to claim 3, wherein the mass ratio [(F1) / (B)] of the content of the (F1) acrylic acid / alkyl methacrylate copolymer to the content of the (B) phospholipid or its derivative is 0.2 to 1.

5.

6. The emulsifying composition according to claim 3, wherein the content of the (F2) (sodium acrylate / sodium acryloyldimethyl taurate) copolymer is 0.04% by mass to 1.5% by mass.

7. The emulsified composition according to claim 3, wherein the mass ratio [(F2) / (B)] of the content of the (F2) (sodium acrylate / sodium acryloyldimethyl taurate) copolymer to the content of the (B) phospholipid or its derivative is 0.02 to 15.

00.

8. (G) The emulsified composition according to claim 1, comprising carbomer.

9. The emulsified composition according to claim 8, wherein the content of (G) carbomer is 0.01% by mass to 0.3% by mass.

10. The emulsified composition according to claim 1, comprising (H) trimethylglycine.

11. The emulsified composition according to claim 10, wherein the content of (H) trimethylglycine is 0.3% by mass to 7% by mass.

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