Emulsified cosmetic

Abstract

To provide an emulsified cosmetic with a high content of niacinamide, exhibiting appropriate hardness and spreadability upon application, and providing effects of reducing skin stiffness and giving firmness to the skin after application.SOLUTION: The emulsified cosmetic of the present invention comprises: component A: niacinamide; component B: at least one selected from the group consisting of a vinylpyrrolidone-based film-forming polymer, pullulan, and polyvinyl alcohol; component C: an oily component being solid at 25°C; component D: an oily component being liquid or pasty at 25°C; and component E: water, wherein the content of component A is 3.0-10.0 mass%, the content of component B is 0.2-3.0 mass%, the content of component C is 2.0-15.0 mass%, the content of component D is 3.0-20.0 mass%, and the content of component E is 30.0-80.0 mass%.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an emulsion cosmetic. [Background technology]

[0002] Skin cosmetics containing niacinamide have been known for the purposes of improving wrinkles, preventing blemishes, whitening, etc. (Patent Document 1) [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-247443 Summary of the Invention [Problem to be solved by the invention]

[0004] The physical properties and usability required for skin cosmetics vary depending on the intended subject, method of use, and area of ​​use. Even among skin cosmetics containing the above-mentioned niacinamide, for example, those intended for application over a relatively wide area, such as the entire face, may require good spreadability. On the other hand, those intended for local application to areas such as the eyes, corners of the eyes, and mouth may require a certain degree of hardness and relatively limited spreadability. Furthermore, the feel during and after application can vary, including freshness, richness, and firmness. In addition, when a high amount of niacinamide is included, the niacinamide-related squeakiness after application is likely to occur, affecting the feel during use. Therefore, it is necessary to consider this effect when creating cosmetics with appropriate physical properties and usability.

[0005] To provide an emulsified cosmetic that contains a high amount of niacinamide, has a moderate hardness and a moderate spreadability when applied, and further, suppresses skin creaking after application and imparts firmness to the skin. [Means for solving the problem]

[0006] The present invention provides an emulsion cosmetic containing the following components (A), (B), (C), (D), and (E), in which the content of component (A) is 3.0 to 10.0 mass%, the content of component (B) is 0.2 to 3.0 mass%, the content of component (C) is 2.0 to 15.0 mass%, the content of component (D) is 3.0 to 20.0 mass%, and the content of component (E) is 30.0 to 80.0 mass%. Ingredient (A): Niacinamide Component (B): At least one selected from the group consisting of vinylpyrrolidone-based film-forming polymers, pullulan, and polyvinyl alcohol Ingredient (C): An oily ingredient that is solid at 25°C Component (D): An oily component that is liquid or paste-like at 25°C Ingredient (E): Water

[0007] Component (C) preferably contains the following component (C1), and the content of component (C1) is preferably 0.5 to 10.0 mass %. Ingredient (C1): Beeswax

[0008] The above-mentioned emulsion cosmetic further contains the following component (F), and the content of component (F) is preferably 0.5 to 5.0% by mass. Component (F): Nonionic surfactant

[0009] The above-mentioned emulsion cosmetic is preferably a skin cosmetic for topical application. [Effects of the Invention]

[0010] The emulsion cosmetic of the present invention contains a high amount of niacinamide. Additionally, it has an appropriate hardness and spreads smoothly upon application. Furthermore, after application, it can suppress skin creaking and impart a firmness, particularly a supple firmness, to the skin. Therefore, it exhibits excellent usability and feel, particularly as a cosmetic to be applied topically to areas such as the eyes, corners of the eyes, and mouth. The "firmness" mentioned above refers to a feeling that the skin is moderately pulled and free of sagging. DETAILED DESCRIPTION OF THE INVENTION

[0011] The present invention will be described in detail below.

[0012] The emulsion cosmetic of the present invention contains at least niacinamide; at least one selected from the group consisting of vinylpyrrolidone film-forming polymers, pullulan, and polyvinyl alcohol; an oil component that is solid at 25°C; an oil component that is liquid or pasty at 25°C; and water. The emulsion cosmetic of the present invention preferably contains a nonionic surfactant. Furthermore, the oil component that is solid at 25°C preferably contains beeswax.

[0013] In this specification, the "niacinamide" may be referred to as "component (A)," the "at least one selected from the group consisting of vinylpyrrolidone film-forming polymers, pullulan, and polyvinyl alcohol" as "component (B)," the "oil component that is solid at 25°C" as "component (C)," the "oil component that is liquid or pasty at 25°C" as "component (D)," the "water" as "component (E)," and the "nonionic surfactant" as "component (F)." Also, the "beeswax" may be referred to as "component (C1)."

[0014] The emulsion cosmetic of the present invention contains component (A), component (B), component (C), component (D), and component (E). The emulsion cosmetic of the present invention preferably contains component (F). Component (C) preferably contains component (C1). The emulsion cosmetic of the present invention may contain components (other components) other than the above components (A) to (F). Furthermore, the components contained in the emulsion cosmetic of the present invention (for example, components (A) to (F) and other components) may each be used alone or in combination of two or more.

[0015] [Ingredient (A): Niacinamide] Component (A) is niacinamide (nicotinamide). Component (A) is, for example, a compound whose INCI name is "Niacinamide." Component (A) is an active ingredient for wrinkle improvement, blemish prevention, whitening, etc. Component (A) may be used alone or in combination of two or more types.

[0016] The content of component (A) in the emulsion cosmetic of the present invention is 3.0% by mass or more and 10.0% by mass or less, preferably 8.0% by mass or less, relative to 100% by mass of the emulsion cosmetic of the present invention. A content of 3.0% by mass or more ensures sufficient effects of wrinkle improvement, blemish prevention, and whitening. A content of 10.0% by mass or less reduces squeaky sensation after application. The content of component (A) is the total content of all components (A) in the emulsion cosmetic of the present invention.

[0017] [Component (B): at least one selected from the group consisting of vinylpyrrolidone-based film-forming polymers, pullulan, and polyvinyl alcohol] Component (B) is at least one selected from the group consisting of vinylpyrrolidone film-forming polymers, pullulan, and polyvinyl alcohol. Component (B) exerts the effect of imparting a firming feeling to the skin after application of the emulsion cosmetic. Component (B) may be used alone or in combination of two or more.

[0018] The vinylpyrrolidone-based film-forming polymer is a polymer containing at least one structural unit derived from vinylpyrrolidone, i.e., a polymer containing vinylpyrrolidone as at least one monomer component. Examples of the vinylpyrrolidone-based film-forming polymer include vinylpyrrolidone-N,N-dimethylaminoethyl methacrylic acid copolymer diethyl sulfate, vinylimidazolium trichloride / vinylpyrrolidone copolymer, polyvinylpyrrolidone / alkylaminoacrylate / vinylcaprolactam copolymer, methylvinylimidazolium chloride-vinylpyrrolidone copolymer, vinylpyrrolidone / dimethylaminopropyl methacrylamide / lauryldimethylaminopropyl methacrylamide copolymer, polyvinylpyrrolidone, vinyl acetate-vinylpyrrolidone copolymer, styrene / vinylpyrrolidone copolymer ((styrene / VP) copolymer), and vinylpyrrolidone / methacrylamide / vinylimidazole copolymer. Among these, polyvinylpyrrolidone is preferred.

[0019] The polyvinylpyrrolidone is, for example, a compound designated by the INCI name "PVP." The weight-average molecular weight of the polyvinylpyrrolidone is not particularly limited, but is preferably 8,000 to 3,000,000, and more preferably 40,000 to 400,000. The K value of the polyvinylpyrrolidone as measured by the Fikentscher method is not particularly limited, but is preferably 10 to 120, and more preferably 30 to 90. Examples of commercially available polyvinylpyrrolidone include trade names: Luviscol K30, K60, K80, K90 (manufactured by BASF), trade names: PVP K12, K30, K60, K80, K90 (manufactured by ISP), and trade names: Creasious K30, K90 (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.).

[0020] The pullulan is, for example, a compound known by the INCI name "PULLULAN." The weight-average molecular weight of the pullulan is not particularly limited, but is preferably 100,000 to 300,000. Commercially available pullulan products include, for example, the product name "Pullulan for Cosmetics" (manufactured by Hayashibara Co., Ltd.).

[0021] The polyvinyl alcohol is, for example, a compound designated by the INCI name "POLYVINYL ALCOHOL."

[0022] The content of component (B) in the emulsion cosmetic of the present invention is 0.2% by mass or more, preferably 0.4% by mass or more, and 3.0% by mass or less, preferably 1.0% by mass or less, relative to 100% by mass of the emulsion cosmetic of the present invention. A content of 0.2% by mass or more ensures a sufficient firmness after application. A content of 3.0% by mass or less ensures that the film does not become too hard, resulting in a more supple firmness. The content of component (B) is the total content of all components (B) in the emulsion cosmetic of the present invention.

[0023] [Component (C): An oily component that is solid at 25°C] Component (C) is an oily component that is solid at 25°C. Component (C) gives the emulsion cosmetic a formulation with appropriate hardness, allowing it to spread to a certain extent upon application, but with a property that spreadability is suppressed to a degree that is not too good. Because the emulsion cosmetic of the present invention has a certain degree of suppressed spreadability, it has excellent handleability, particularly when applied topically. Examples of component (C) include waxes, higher alcohols, hydrocarbon oils, ester oils, and higher fatty acids that are solid at 25°C. Only one type of component (C) may be used, or two or more types may be used.

[0024] Examples of waxes that are solid at 25°C include carnauba wax, candelilla wax, beeswax, sunflower seed wax (sunflower wax), rice bran wax, Japan wax, shellac wax, spermaceti, and hydrogenated jojoba oil.

[0025] Examples of the higher alcohols that are solid at 25° C. (for example, aliphatic alcohols having 8 to 22 carbon atoms) include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, arachidyl alcohol, and behenyl alcohol.

[0026] Examples of the hydrocarbon oil that is solid at 25°C include ceresin, paraffin, microcrystalline wax, polyethylene wax, and Fischer-Tropsch wax.

[0027] Examples of the ester oil that is solid at 25°C include cetyl palmitate, myristyl myristate, glyceryl tristearate, glyceryl tribehenate, glyceryl trimyristate, and glyceryl tri(behenate / isostearate / eicosanedioate).

[0028] Examples of the higher fatty acids that are solid at 25° C. (for example, fatty acids having 8 to 22 carbon atoms) include lauric acid, myristic acid, palmitic acid, and stearic acid.

[0029] Component (C) preferably contains beeswax [component (C1)]. Component (C1) imparts a moderate oily feel and further improves the effect of reducing the squeaking caused by component (A) and components (C) other than component (C1). Furthermore, it exerts the effect of making the firmness provided by component (B) even more supple and firm. In other words, the firmness can be said to be due to the feeling of a film formed on the skin (film-like feel), and component (C1) makes the film feel even more flexible.

[0030] The beeswax of component (C1) is, for example, a wax obtained by hot pressing or solvent extraction from the residue left after honey is extracted from beehives. The beeswax may also be bleached beeswax, which is obtained by bleaching beeswax through sunlight bleaching, chemical bleaching, adsorption, or the like. Examples of commercially available beeswax include Kosan Dash Sea Beeswax (manufactured by Miki Chemical Industry Co., Ltd.) and Refined Beeswax CY-100 (manufactured by Yokozeki Oil & Fat Industries Co., Ltd.).

[0031] The content of component (C) in the emulsion cosmetic of the present invention is 2.0% by mass or more, preferably 4.0% by mass or more, and 15.0% by mass or less, preferably 8.0% by mass or less, relative to 100% by mass of the emulsion cosmetic of the present invention. By ensuring that the content is within the above range, the emulsion cosmetic of the present invention becomes a formulation with an appropriate hardness, and while it spreads to a certain extent upon application, it also has the characteristic of suppressing spreadability to a degree that is not too good. The content of component (C) is the total content of all components (C) in the emulsion cosmetic of the present invention.

[0032] The content of component (C1) in the emulsion cosmetic of the present invention is preferably 0.5% by mass or more, more preferably 2.0% by mass or more, and preferably 10.0% by mass or less, more preferably 7.0% by mass or less, relative to 100% by mass of the emulsion cosmetic of the present invention. A content of 0.5% by mass or more further suppresses squeaking and further improves the effect of imparting a supple, firm feeling. Furthermore, a content of 10.0% by mass or less is preferable because it does not cause an excessively strong oily feeling. The content of component (C1) is the total content of all components (C1) in the emulsion cosmetic of the present invention.

[0033] [Component (D): An oily component that is liquid or paste-like at 25°C] Component (D) is an oily component that is liquid or pasty at 25°C. Component (D) imparts an oily feel to the emulsion cosmetic and has the effect of reducing the squeaking caused by components (A) and (C). It also has the effect of making the firmness provided by component (B) even more supple and firm. Examples of component (D) include higher alcohols, hydrocarbon oils, animal and vegetable oils, ester oils, silicone oils, and higher fatty acids that are liquid or pasty at 25°C. Only one type of component (C) may be used, or two or more types may be used.

[0034] Examples of the hydrocarbon oil that is liquid or pasty at 25°C include petrolatum, α-olefin oligomer, mineral oil, hydrogenated polyisobutene, isododecane, light isoparaffin, light liquid isoparaffin, squalane, liquid paraffin, and liquid isoparaffin.

[0035] Examples of the animal and vegetable oils that are liquid or pasty at 25°C include avocado oil, argan oil, olive oil, rice bran oil, soybean oil, corn oil, palm kernel oil, palm oil, castor oil, grape seed oil, kukui nut oil, jojoba oil, macadamia nut oil, crambe abyssinica seed oil, meadowfoam oil, and sunflower oil.

[0036] Examples of the ester oils that are liquid or paste-like at 25°C include phytosteryl macadamiate, shea butter, dipentaerythrityl hexa(hydroxystearate / hexastearic acid / hexarosinate), triglyceride (caprylic / capric / myristic / stearic acid), hydrogenated castor oil hydroxystearate, di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate, di(phytosteryl / octyldodecyl) lauroyl glutamate, ethyl oleate, isopropyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, octyldodecyl myristate, octyldodecyl oleate, ethyl isostearate, isostearate, methyl ... Isopropyl tearate, propylene glycol isostearate, cetyl 2-ethylhexanoate, cetostearyl 2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, caprylic / capric triglyceride, glyceryl triisopalmitate, pentaerythritol tetra-2-ethylhexanoate, diisopropyl adipate, isocetyl octanoate, isostearyl octanoate, isocetyl isostearate, octyldodecyl isostearate, octyldodecyl dimethyloctanoate, isononyl isononanoate, pentaerythrityl tetraoctanoate, pentaerythrityl tetraisostearate, and polyglyceryl-10 decaisostearate.

[0037] Examples of the higher fatty acids (for example, fatty acids having 8 to 22 carbon atoms) that are liquid or pasty at 25° C. include isostearic acid and oleic acid.

[0038] Examples of the higher alcohols (for example, aliphatic alcohols having 8 to 22 carbon atoms) that are liquid or pasty at 25° C. include octyldodecanol.

[0039] Examples of the silicone oil that is liquid or paste at 25°C include dimethylpolysiloxane (for example, a kinetic viscosity at 25°C of 1.0 to 100,000 mm 2 Examples include dimethylpolysiloxane (oxyethylene-oxypropylene) methylpolysiloxane copolymer, cyclopentasiloxane, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, polyoxyethylene-methylpolysiloxane copolymer, aminoethylaminopropylmethylsiloxane-dimethylpolysiloxane copolymer, and dimethiconol. Silicone oils that are liquid at 25°C may be either volatile or non-volatile.

[0040] The content of component (D) in the emulsion cosmetic of the present invention is 3.0% by mass or more, preferably 5.0% by mass or more, and 20.0% by mass or less, preferably 15.0% by mass or less, relative to 100% by mass of the emulsion cosmetic of the present invention. A content of 3.0% by mass or more suppresses squeaking. Furthermore, it imparts appropriate spreadability. Furthermore, a content of 20.0% by mass or less is preferable because it does not cause an excessively oily feel. The content of component (D) is the total content of all components (D) in the emulsion cosmetic of the present invention.

[0041] [Component (E): Water] Component (E) is water. Component (E) is preferably purified water. Component (E) is the medium of the emulsion cosmetic of the present invention. The content of component (E) in the emulsion cosmetic of the present invention is 30.0% by mass or more, preferably 50.0% by mass or more, and 80.0% by mass or less, preferably 75.0% by mass or less, relative to 100% by mass of the emulsion cosmetic of the present invention. The content of component (E) is the total content of all components (E) in the emulsion cosmetic of the present invention.

[0042] [Component (F): Nonionic surfactant] Component (F) is a nonionic surfactant. Component (F) contributes to the stability of emulsion cosmetics. Examples of component (F) include sorbitan fatty acid esters, glycerin fatty acid esters and their alkylene oxide adducts, polyoxyalkylene alkyl ethers, polyoxyalkylene fatty acid esters, polyglycerin fatty acid esters, polyoxyalkylene alkylphenols, polyoxyethylene sorbit fatty acid esters, polyoxyethylene alkylphenyl formaldehyde condensates, polyoxyethylene sterol and its derivatives, polyoxyethylene lanolin and its derivatives, alkyl glucosides, polyoxyethylene beeswax derivatives, sugar esters, polyoxyethylene hydrogenated castor oil, and polyoxyethylene castor oil. Component (F) may be used alone or in combination of two or more types.

[0043] The average number of moles of oxyethylene (ethylene oxide: EO) added in the polyoxyethylene hydrogenated castor oil is preferably 5-120, more preferably 20-100, and even more preferably 40-60.

[0044] Examples of the polyoxyalkylene alkyl ether include polyoxyethylene polyoxypropylene decyl tetradecyl ether, etc. Examples of the polyoxyethylene polyoxypropylene decyl tetradecyl ether include PPG-6 decyl tetradeceth-20 and PPG-6 decyl tetradeceth-30.

[0045] Examples of the monoglycerin fatty acid esters include glyceryl monocaprylate, glyceryl monocaprate, glyceryl monolaurate, glyceryl monomyristate, glyceryl monopalmitate, glyceryl monostearate, glyceryl distearate, glyceryl monoisostearate, glyceryl diisostearate, glyceryl monohydroxystearate, glyceryl monooleate, glyceryl monobehenate, and glyceryl dibehenate.

[0046] Examples of the polyglycerol fatty acid esters include polyglycerol fatty acid monoesters such as diglyceryl monostearate, diglyceryl monooleate, diglyceryl monoisostearate, tetraglyceryl monostearate, tetraglyceryl monooleate, hexaglyceryl monolaurate, hexaglyceryl monomyristate, hexaglyceryl monostearate, hexaglyceryl monooleate, decaglyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, and decaglyceryl monooleate; diolein; Examples of suitable fatty acid diesters include polyglycerol fatty acid diesters such as diglyceryl distearate, decaglyceryl distearate, and decaglyceryl diisostearate; polyglycerol fatty acid triesters such as tetraglyceryl tristearate, hexaglyceryl tristearate, decaglyceryl trioleate; polyglycerol fatty acid pentaesters such as tetraglyceryl pentastearate, tetraglyceryl pentaoleate, hexaglyceryl pentastearate, and hexaglyceryl pentaoleate; and polyglyceryl-6 octastearate.

[0047] The average degree of polymerization of the polyglycerol in the polyglycerol fatty acid ester is preferably 2 to 10 from the viewpoint of enhancing emulsion stability.

[0048] The fatty acid in the polyglycerol fatty acid ester is preferably a fatty acid having 8 to 24 carbon atoms, more preferably a fatty acid having 10 to 20 carbon atoms, and even more preferably a fatty acid having 12 to 18 carbon atoms, from the viewpoint of enhancing emulsion stability.

[0049] Examples of the sorbitan fatty acid esters include sorbitan monocaprate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan distearate, sorbitan sesquistearate, sorbitan tristearate, sorbitan trioleate, sorbitan monoisostearate, sorbitan sesquiisostearate, sorbitan monooleate, sorbitan sesquioleate, and coconut oil fatty acid sorbitan.

[0050] Examples of the polyoxyethylene fatty acid esters include polyethylene glycol monolaurate, polyethylene glycol monopalmitate, polyethylene glycol monostearate, polyethylene glycol monoisostearate, polyethylene glycol distearate, polyethylene glycol monooleate, and polyethylene glycol dioleate.

[0051] Examples of the polyoxyethylene glycerin fatty acid esters include polyoxyethylene (caprylic / capric) glyceryl, polyoxyethylene coconut oil fatty acid glycerin, polyoxyethylene glyceryl monooleate, polyoxyethylene glyceryl monomyristate, polyoxyethylene glyceryl monostearate, polyoxyethylene glyceryl monoisostearate, polyoxyethylene glyceryl triisostearate, etc. The average number of moles of oxyethylene added is not particularly limited, but from the viewpoint of enhancing emulsion stability, it is preferably 2 to 100, more preferably 4 to 90.

[0052] Examples of the polyoxyethylene sorbitan fatty acid ester include polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan tristearate, polyoxyethylene sorbitan oleate, polyoxyethylene sorbitan trioleate, etc. The average number of moles of oxyethylene added is not particularly limited, but is preferably 5 to 50, more preferably 10 to 30, from the viewpoint of enhancing emulsion stability.

[0053] The content of component (F) in the emulsion cosmetic of the present invention is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, and preferably 5.0% by mass or less, more preferably 3.0% by mass or less, relative to 100% by mass of the emulsion cosmetic of the present invention. A content of 0.5% by mass or more improves emulsion stability. A content of 5.0% by mass or less can suppress stickiness caused by component (F). The content of component (F) is the total content of all components (F) in the emulsion cosmetic of the present invention.

[0054] [Polyhydric alcohol] The emulsion cosmetic of the present invention may contain a polyhydric alcohol from the viewpoint of imparting a moisturizing feeling. Examples of the polyhydric alcohol include glycols such as ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, isoprene glycol, 1,3-butylene glycol, 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, and 1,2-decanediol; glycerins such as glycerin, diglycerin, and polyglycerin; and sugar alcohols such as inositol, xylitol, trehalose, maltitol, mannitol, sorbitol, erythritol, arabitol, ribitol, galactitol, and glucitol. The content of the polyhydric alcohol in the emulsion cosmetic of the present invention is not particularly limited, but is preferably 3.0 to 30.0% by mass, and more preferably 5.0 to 15.0% by mass, relative to 100% by mass of the emulsion cosmetic of the present invention.

[0055] [ethanol] The emulsion cosmetic of the present invention may contain ethanol from the viewpoint of improving a refreshing feeling and preservative effect. The content of ethanol in the emulsion cosmetic of the present invention is not particularly limited, but is preferably 1.0 to 20.0% by mass, and more preferably 3.0 to 10.0% by mass, relative to 100% by mass of the emulsion cosmetic of the present invention.

[0056] [Water-soluble polymer] The emulsion cosmetic of the present invention may contain a water-soluble polymer from the viewpoint of adjusting viscosity and improving emulsion stability. By thickening the emulsion cosmetic with the water-soluble polymer, the emulsion cosmetic can be made into a dosage form such as a viscous emulsion, gel, or cream. The water-soluble polymer does not include component (B). Examples of the water-soluble polymer include acrylic water-soluble polymers, gelatin, xanthan gum, guar gum, carrageenan, pectin, locust bean gum, alginate, methylcellulose, ethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, and hydroxypropylmethylcellulose. The water-soluble polymer may be used alone or in combination of two or more.

[0057] Among the above-mentioned water-soluble polymers, acrylic water-soluble polymers (water-soluble acrylic polymers) are preferred. Examples of acrylic water-soluble polymers include carboxyvinyl polymers (carbomers), alkyl-modified carboxyvinyl polymers (acrylates / C10-30 alkyl acrylate crosspolymers), alkyl acrylate copolymers, acrylates / steareth-20 methacrylate copolymers, acrylates / steareth-20 methacrylate crosspolymers, acrylates / beheneth-25 methacrylate copolymers, acrylates / vinyl neodecanoate crosspolymers, sodium acrylate / sodium acryloyldimethyl taurate copolymers, and hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymers. The above-mentioned acrylic water-soluble polymers may be used alone or in combination of two or more.

[0058] Examples of commercially available acrylic water-soluble polymers include trade names: SIMULGEL EG, SIMULGEL EG QD, SIMULGEL NS (manufactured by Seppic), trade names: Aculin 22, Aculin 88, Aculin 28 (manufactured by Dow Chemical), Carbopol 940, Carbopol 941, Carbopol 934, Carbopol 980, Carbopol 981 (manufactured by Lubrizol), trade names: Pemulen TR-1, Pemulen TR-2, Carbopol 1382, Carbopol 1342, Carbopol ETD2020, Carbopol Ultrez 20, Carbopol Ultrez 21 (manufactured by Lubrizol), and the like.

[0059] The acrylic water-soluble polymer may be neutralized with a basic substance or may be used after being neutralized with a basic substance. Examples of the basic substance in this case include alkanolamines such as triethanolamine and monoethanolamine; inorganic bases such as ammonia, sodium hydroxide and potassium hydroxide; and basic amino acids such as arginine. The amount of basic substance added is an amount sufficient to neutralize the acrylic water-soluble polymer, and may be appropriately adjusted depending on the types of the acrylic water-soluble polymer and the basic substance, and the amount of the acrylic water-soluble polymer used.

[0060] The content of the water-soluble polymer in the emulsion cosmetic of the present invention is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more, relative to 100% by mass of the emulsion cosmetic of the present invention, and is 2.0% by mass or less, preferably 1.0% by mass or less. The content of the water-soluble polymer is the total content of all of the water-soluble polymers in the emulsion cosmetic of the present invention.

[0061] [Other ingredients] The emulsion cosmetic of the present invention may contain ingredients other than those described above (other ingredients) as long as they do not impair the objectives of the present invention. These other ingredients are not particularly limited and include, for example, ingredients commonly used in cosmetics and quasi-drugs. Specific examples include cooling agents such as menthol and menthyl glyceryl ether; ceramides; moisturizing agents such as glycerin mono 2-ethylhexyl ether and acetylhydroxyproline; preservatives and disinfectants such as parahydroxybenzoates and phenoxyethanol; pH adjusters such as phosphoric acid and its salts, citric acid and its salts, lactic acid and its salts, sodium hydroxide, and triethanolamine; anti-inflammatory agents such as glycyrrhizic acid and its salts; fragrances; colorants; UV absorbers; antioxidants; sequestering agents (chelating agents); vitamins; amino acids and NMFs; astringents; whitening agents; animal and plant extracts; acids; alkalis; etc.

[0062] [Emulsion cosmetic of the present invention] The emulsion cosmetic of the present invention can be produced by any known or conventional method, and the production method is not particularly limited. For example, it can be produced by mixing the above-mentioned components and stirring them with a homomixer, disper mixer, paddle mixer, or the like.

[0063] The emulsion cosmetic of the present invention is preferably an oil-in-water (O / W) emulsion cosmetic.

[0064] The emulsified cosmetic of the present invention can be used by being filled into a container from which the composition can be easily taken out, such as a dispenser container, a tube container, or a wide-mouth jar container.

[0065] The emulsion cosmetic of the present invention is preferably a skin cosmetic to be applied to the skin. The emulsion cosmetic of the present invention is not particularly limited, but examples thereof include skin care cosmetics such as moisturizing cosmetics, whitening cosmetics, acne care cosmetics, and anti-aging cosmetics (for example, intended to inhibit wrinkles and inhibit sagging); scalp care cosmetics (for example, intended to inhibit moisturizing and inhibit sebum production); deodorant cosmetics; and sunscreen cosmetics. Among these, cosmetics for inhibiting or improving wrinkles are preferred. The emulsion cosmetic of the present invention may be, for example, any of cosmetics, quasi-drugs, pharmaceuticals, and miscellaneous goods.

[0066] The formulation of the emulsion cosmetic of the present invention is not particularly limited, and examples thereof include various formulations such as cream, gel, emulsion, roll-on, sheet (paper), etc. Of these, cream is preferred.

[0067] The areas to which the emulsion cosmetic of the present invention can be applied are not particularly limited, and examples include the face (forehead, eyes, corners of the eyes, cheeks, mouth, etc.), the body (arms, elbows, back of the hands, fingertips, feet, knees, heels, neck, armpits, back, etc.), etc. The emulsion cosmetic of the present invention has an appropriate hardness and spreads to a certain extent when applied, but has properties that limit spreadability so that it does not spread too easily, and is therefore preferably a skin cosmetic for topical application that is used by applying it locally to areas such as the eyes, corners of the eyes, and mouth. [Example]

[0068] The present invention will be specifically described below with reference to examples and comparative examples. The present invention is not limited to the following examples. The blending amounts shown in the tables are expressed in "% by mass" unless otherwise specified.

[0069] Examples and Comparative Examples The emulsion cosmetics of the Examples and Comparative Examples were prepared by conventional methods according to the compositions shown in the tables. The "mixed raw material of glyceryl behenate and polyglyceryl-6 octastearate" shown in the tables is trade name: TAISET-50 (manufactured by Taiyo Kagaku Co., Ltd.), and the "mixed raw material containing (sodium acrylate / sodium acryloyldimethyltaurate) copolymer" is trade name: SIMULGEL EG (manufactured by Seppic Pharmaceuticals).

[0070] (evaluation) The evaluation was carried out as follows: All evaluations were carried out by three expert evaluators.

[0071] (Test Example 1: Spreading upon application (moderately suppressed spread)) Approximately 0.05 g of the emulsion cosmetics obtained in the Examples and Comparative Examples was taken on the fingertips and applied to the outer corners of either the left or right eye and around the eyes, from the inner corner to the outer corner, and the application feel upon application was evaluated according to the following evaluation criteria. <Evaluation criteria for spreadability upon application> ◯ (Good): The emulsion cosmetic could be applied from the inner corner of the eye to the outer corner of the eye, and it felt like the emulsion cosmetic had disappeared from the fingertips after one application in one direction (i.e., it had been applied completely). × (bad): The cosmetic does not spread sufficiently from the inner corner of the eye to the outer corner of the eye, or even after one application in one direction, it feels like some of the emulsified cosmetic remains on the fingertips.

[0072] (Test Example 2: Firmness after application) Immediately after application of the emulsion cosmetic in Test Example 1, the feel at the corners of the eyes and around the eyes was evaluated according to the following evaluation criteria. <Evaluation criteria for firmness after application> ○ (Good): Firmness is clearly felt. × (bad): No or almost no firmness is felt.

[0073] (Test Example 3: No squeaking after application) Immediately after applying the emulsion cosmetic in Test Example 1, the outer corners and around the eyes were touched with the fingers, and the sensation at that time was evaluated according to the following evaluation criteria. <Evaluation criteria for lack of squeaking after application> ○ (Good): The surface of the skin where it was applied felt fresh and moist, and there was no feeling of roughness. × (bad): The surface of the skin where it was applied does not feel moist and feels rough.

[0074] The results are shown in the table below.

[0075] [Table 1]

[0076] [Table 2]

[0077] [Table 3]

[0078] The following table shows formulation examples of emulsion cosmetics of the present invention.

[0079] [Table 4]

Claims

1. Contains the following component A, the following component B, the following component C, the following component D, and the following component E, The content of the component A is 3.0 to 10.0 mass %, The content of the component B is 0.2 to 3.0 mass %, The content of the component C is 2.0 to 15.0 mass %, The content of the component D is 3.0 to 20.0 mass %, An emulsion cosmetic in which the content of component E is 30.0 to 80.0% by mass. Ingredient A: Niacinamide Component B: At least one member selected from the group consisting of vinylpyrrolidone-based film-forming polymers, pullulan, and polyvinyl alcohol Component C: An oily component that is solid at 25°C Component D: an oily component that is liquid or paste-like at 25°C Component E: Water

2. 2. The emulsion cosmetic according to claim 1, wherein the component C comprises the following component C1, and the content of the component C1 is 0.5 to 10.0% by mass: Ingredient C1: Beeswax

3. 3. The emulsion cosmetic according to claim 1, further comprising the following component F, wherein the content of component F is 0.5 to 5.0% by mass: Component F: Nonionic surfactant

4. 3. The emulsion cosmetic according to claim 1, which is a skin cosmetic for topical application.

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