Oil-in-water emulsion cosmetic

Abstract

To provide an oil-in-water emulsion cosmetic which achieves both good spreadability and a penetration feeling during application and provides a thin film feeling as if adhering to the skin while suppressing stickiness after application thereby enabling to achieve sustained high moisturizing effect.SOLUTION: There is provided an oil-in-water emulsion cosmetic which comprises the following components (A) to (D), wherein the following components (A) to (C), the following component (E) and the following component (F) satisfy a specific content ratio. Component (A): a fatty acid triglyceride which is solid at 25°C in which a fatty acid is a saturated fatty acid having a linear structure. Component (B): beeswax. Component (C): di(octyldodecyl / phytosteryl / behenyl)lauroylglutamic acid and / or di(phytosteryl / octyldodecyl)lauroylglutamic acid. Component (D): water. Component (E): an oily component which is liquid at 25°C. Component (F): an oily component which is solid at 25°C other than the component (A), the component (B) and the component (C).SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to an oil-in-water emulsion cosmetic. [Background technology]

[0002] Cream-type emulsion cosmetics are widely used as skin cosmetics used for moisturizing the skin, etc. (e.g., Patent Document 1). Cream-type emulsion cosmetics are characterized by various properties, such as application sensations, such as richness, penetration, and spreadability upon application, and oily emollient sensations, filmy sensations that protect the skin, and non-stickiness after application. Conventional cream-type emulsion cosmetics have a richness and oily emollient sensation, but many of them have a heavy application sensation and low penetration sensation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-222317 A Summary of the Invention [Problem to be solved by the invention]

[0004] Here, the present inventor attempted to create an emulsion cosmetic having a unique feel when applied, such as a good spreading feel as if it melts when applied, excellent penetration feeling, and a thin film of the agent with good adhesion on the skin after application. However, when a high amount of liquid oil is blended in an attempt to increase the spread of the agent to improve the application feeling, there is a problem that the oiliness becomes strong when applied and the penetration feeling is reduced. In addition, the penetration feeling may also be reduced by using a solid oil to generate a film feeling after application.

[0005] Therefore, an object of the present invention is to provide an oil-in-water emulsion cosmetic which has both a good spreading feel as if it melts when applied and a good penetration feel, and which provides a thin film feel that adheres closely to the skin after application. [Means for solving the problem]

[0006] The present inventors conducted intensive research to solve the above problems and found that an oil-in-water emulsion cosmetic containing components (A) to (D) described below and containing components (A) to (C), (E), and (F) described below in specific content ratios provides both a good application feel and a good penetration feel when applied, and provides a thin film feel that adheres closely to the skin after application. The present invention was completed based on these findings.

[0007] That is, the present invention provides an oil-in-water emulsion cosmetic comprising the following components (A), (B), (C), and (D), in which the content of component (A) is 0.1 to 2.5% by mass, the content of component (B) is 0.3 to 2.0% by mass, the content of component (C) is 0.5 to 3.0% by mass, the content of component (E) below may or may not be present, and the content of component (E) is 10.0% by mass or less, and the content of component (F) below may or may not be present, and the content of component (F) is 1.0% by mass or less. Component (A): A fatty acid triglyceride that is solid at 25°C and in which the fatty acid is a saturated fatty acid with a straight-chain structure. Ingredient (B): Beeswax Component (C): Di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate and / or di(phytosteryl / octyldodecyl) lauroyl glutamate Ingredient (D): Water Ingredient (E): An oily ingredient that is liquid at 25°C Component (F): Oil-based components that are solid at 25°C other than components (A), (B), and (C).

[0008] The oil-in-water emulsion cosmetic further contains the following component (G), and the content of the component (G) is preferably 0.1 to 5.0% by mass. Component (G): Nonionic surfactant

[0009] The oil-in-water emulsion cosmetic further contains the following component (H), and the content of the component (H) is preferably 0.2 to 5.0% by mass. Component (H): Water-soluble polymer

[0010] The oil-in-water emulsion cosmetic further contains the following component (I), and the content of the component (I) is preferably 1.0 to 25.0% by mass. Component (I): Polyhydric alcohol Effect of the Invention

[0011] The oil-in-water emulsion cosmetic of the present invention has both a good spreading feel as if it melts when applied and a good penetration feeling, and after application, a thin film feeling that adheres closely to the skin is obtained, which allows the user to feel that a high moisturizing effect is sustained. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Unless otherwise specified in this specification, "X to Y" representing a numerical range means "greater than or equal to X and less than or equal to Y." Furthermore, unless otherwise specified in this specification, the mass % representing the content ratio of a component is a value assuming the mass of the entire oil-in-water emulsion cosmetic to be 100 mass %.

[0013] In this specification, "solid" at 25°C means that the sample is solid or semi-solid (paste-like) at 25°C, and is not "liquid." Furthermore, "liquid" at 25°C means that when 50 g of a sample is placed in a glass bottle with a radius of 2 cm and a height of 7 cm, and the glass bottle is inverted at a temperature of 25°C, the sample drips from the glass bottle within 5 minutes after the bottle is inverted.

[0014] In the present invention, the "penetration feeling" during application refers to the so-called goodness of compatibility with the skin, and specifically means that the liquid feeling of the agent (the feeling that the liquid agent remains) disappears upon application. In other words, low penetration feeling means that the feeling that the liquid agent remains on the skin continues for a long time. "Good application feel" during application means that there is little resistance felt by the fingers or palms applying the agent when it is absorbed into the skin (when the liquid feel disappears). If there is resistance, as if the fingers or palms are catching when the agent is absorbed into the skin, then the application feel is poor. The "thin film feel" after application means the feeling that a thin film of the agent adheres closely to the skin after application.

[0015] [Oil-in-water emulsion cosmetics] The oil-in-water emulsion cosmetic of the present invention is solid at 25°C and contains at least a fatty acid triglyceride in which the fatty acid is a saturated fatty acid with a straight-chain structure, beeswax, di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate and / or di(phytosteryl / octyldodecyl) lauroyl glutamate, and water.

[0016] In this specification, the above "fatty acid triglyceride which is solid at 25°C and in which the fatty acid is a saturated fatty acid with a straight-chain structure" may be referred to as "component (A)", the above "beeswax" as "component (B)", the above "di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate and / or di(phytosteryl / octyldodecyl) lauroyl glutamate" as "component (C)", and the above "water" as "component (D)". In other words, the oil-in-water emulsion cosmetic of the present invention contains at least component (A), component (B), component (C), and component (D).

[0017] The oil-in-water emulsion cosmetic of the present invention may contain an oily component that is liquid at 25°C. The oil-in-water emulsion cosmetic of the present invention may contain an oily component that is solid at 25°C other than components (A), (B), and (C). In addition, the oil-in-water emulsion cosmetic of the present invention preferably contains a nonionic surfactant. The oil-in-water emulsion cosmetic of the present invention preferably contains a water-soluble polymer. The oil-in-water emulsion cosmetic of the present invention preferably contains a polyhydric alcohol. In this specification, the above-mentioned "oily component that is liquid at 25°C" may be referred to as "component (E)", the above-mentioned "oily component that is solid at 25°C other than components (A), (B), and (C)" may be referred to as "component (F)", the above-mentioned "nonionic surfactant" may be referred to as "component (G)", the above-mentioned "water-soluble polymer" may be referred to as "component (H)", and the above-mentioned "polyhydric alcohol" may be referred to as "component (I)". The oil-in-water emulsion cosmetic may contain component (E), component (F), component (G), component (H), and component (I), and may also contain components other than components (A) to (I).

[0018] <Component (A)> Component (A) is a fatty acid triglyceride that is solid at 25°C and in which the fatty acid is a saturated fatty acid with a straight chain structure (i.e., a fatty acid triglyceride in which all three fatty acids are saturated fatty acids with a straight chain structure). Component (A) imparts a good application feel to the oil-in-water emulsion cosmetic upon application. Only one type of component (A) may be used, or two or more types may be used.

[0019] Examples of the linear saturated fatty acid include linear saturated fatty acids having 8 to 22 carbon atoms. Specific examples of the linear saturated fatty acids having 8 to 22 carbon atoms include caprylic acid, capric acid, lauric acid, behenic acid, myristic acid, palmitic acid, stearic acid, etc.

[0020] Examples of component (A) include tri(caprylic acid / capric acid / myristic acid / stearic acid), glyceryl tristearate, tribehenin (glyceryl tribehenate), glyceryl trimyristate, etc. Among these, tribehenin and tri(caprylic acid / capric acid / myristic acid / stearic acid) glyceryl are preferred.

[0021] The content of component (A) is 0.1 to 2.5% by mass, preferably 0.2 to 1.5% by mass, based on 100% by mass of the oil-in-water emulsion cosmetic of the present invention. When the content of component (A) is 0.1% by mass or more, the oil-in-water emulsion cosmetic can be given a good application feel. When the content of component (A) is 2.5% by mass or less, the penetration feel is good. In addition, stickiness after application caused by component (A) can be suppressed.

[0022] <Ingredient (B)> Component (B) is beeswax. Component (B) can impart a thin film feel to the oil-in-water emulsion cosmetic after application. Incidentally, "beeswax" is a wax obtained by a method such as a warm pressing method or a solvent extraction method from the residue after honey is extracted from beehives. In this specification, the above-mentioned "beeswax" includes "white beeswax" which is beeswax bleached by a sunlight bleaching method, a chemical bleaching method, adsorption, or the like. Only one type of component (B) may be used, or two or more types may be used.

[0023] The content of component (B) is 0.3 to 2.0% by mass, preferably 0.5 to 1.5% by mass, based on 100% by mass of the oil-in-water emulsion cosmetic of the present invention. By making the content of component (B) 0.3% by mass or more, it is possible to impart a thin-film feel to the oil-in-water emulsion cosmetic. By making the content of component (C) 2.0% by mass or less, the feeling of adhesion is enhanced and the thin-film feel is good.

[0024] <Component (C)> Component (C) is di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate and / or di(phytosteryl / octyldodecyl) lauroyl glutamate. Component (C) can improve the pleasant application feel of the oil-in-water emulsion cosmetic when applied, while imparting a thin film feel after application. Only one type of component (C) may be used, or two or more types may be used.

[0025] The content of component (C) is 0.5 to 3.0% by mass, preferably 1.0 to 2.0% by mass, based on 100% by mass of the oil-in-water emulsion cosmetic of the present invention. By making the content of component (C) 0.5% by mass or more, it is possible to impart a good texture and thin film feel to the oil-in-water emulsion cosmetic when applied. By making the content 3.0% by mass or less, it is possible to suppress stickiness caused by component (C) after application.

[0026] <Ingredient (D)> Component (D) is water. Component (D) acts as a medium for forming an oil-in-water emulsion system. Component (D) is not particularly limited, but purified water is preferred.

[0027] The content of component (D) is preferably 40.0 to 95.0 mass%, more preferably 50.0 to 90.0 mass%, and even more preferably 60.0 to 85.0 mass%, relative to 100 mass% of the oil-in-water emulsion cosmetic of the present invention.

[0028] <Ingredient (E)> Component (E) is an oily component that is liquid at 25°C. The oil-in-water emulsion cosmetic of the present invention may or may not contain component (E). When component (E) is contained, the inclusion of component (E) can suppress stickiness caused by other components such as polyhydric alcohols when the oil-in-water emulsion cosmetic is applied. In addition, the spreadability can be further improved. Only one type of component (E) may be used, or two or more types may be used.

[0029] Component (E) is not particularly limited, but examples thereof include hydrocarbon oils, higher alcohols, ester oils, animal and vegetable oils, silicone oils, higher fatty acids, and the like that are liquid at 25°C.

[0030] Examples of the hydrocarbon oil that is liquid at 25°C include α-olefin oligomer, hydrogenated polyisobutene, isododecane, isohexadecane, (C13-15) alkane, hydrogenated polydecene, light isoparaffin, light liquid isoparaffin, squalane (synthetic squalane, vegetable squalane), squalene, liquid paraffin (mineral oil), liquid isoparaffin, etc.

[0031] Examples of the higher alcohol that is liquid at 25° C. (for example, aliphatic alcohols having 12 to 24 carbon atoms) include isostearyl alcohol.

[0032] Examples of the animal and vegetable oils that are liquid 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.

[0033] Examples of the ester oils that are liquid at 25° C. include ethyl oleate, isopropyl myristate, isopropyl palmitate, myristyl myristate, cetyl palmitate, 2-ethylhexyl palmitate, oleyl oleate, octyldodecyl myristate, octyldodecyl oleate, ethyl isostearate, isopropyl isostearate, propylene glycol isostearate, cetyl 2-ethylhexanoate, cetostearyl 2-ethylhexanoate, and glyceryl tri-2-ethylhexanoate. Examples of suitable glyceryl triisopalmitate include pentaerythritol 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.

[0034] Examples of silicone oils that are liquid at 25° C. include dimethylpolysiloxane (for example, a silicone oil having a kinetic viscosity of 1.0 to 60,000 mm at 25° C.). 2 Examples of suitable silicone oils 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 silicone oils.

[0035] Examples of the higher fatty acids that are liquid at 25° C. (for example, fatty acids having 8 to 22 carbon atoms) include isostearic acid and oleic acid.

[0036] The content of component (E) is 10.0% by mass or less, based on 100% by mass of the oil-in-water emulsion cosmetic of the present invention. By making the content of component (E) 10.0% by mass or less, it is possible to suppress a decrease in the feeling of penetration. In addition, the lower limit is not particularly limited, but it may be 0% by mass (i.e., component (E) is not included), and from the viewpoint of the stickiness suppression effect, it is preferably 3.0% by mass or more, and more preferably 5.0% by mass or more.

[0037] <Component (F)> Component (F) is an oily component that is solid at 25°C, other than components (A), (B), and (C). That is, component (F) is different from any of components (A), (B), and (C). The oil-in-water emulsion cosmetic of the present invention may or may not contain component (F). By containing component (F), the hardness of the preparation can be adjusted. Only one type of component (F) may be used, or two or more types may be used.

[0038] Component (F) is not particularly limited, but examples thereof include waxes, vegetable oils and fats, hydrocarbon oils, higher alcohols, ester oils, higher fatty acids, silicone oils, and the like that are solid at 25°C.

[0039] Examples of the wax that is solid at 25° C. include carnauba wax, candelilla wax, rice bran wax, shellac wax, and spermaceti wax.

[0040] Examples of the vegetable oil that is solid at 25° C. include shea butter, mango butter (mango seed oil), Astrocaryum murumuru seed oil, and the like.

[0041] Examples of the hydrocarbon oil that is solid at 25° C. include petrolatum, ceresin, ozokerite, paraffin, microcrystalline wax, polyethylene wax, and Fischer-Tropsch wax (synthetic wax).

[0042] Examples of the higher alcohol that is solid at 25° C. (for example, aliphatic alcohols having 12 to 24 carbon atoms) include cetyl alcohol (cetanol), stearyl alcohol, and behenyl alcohol.

[0043] Examples of the ester oil that is solid at 25°C include hydrogenated castor oil hydroxystearate, dipentaerythrityl hexahydroxystearate, ethyl stearate, myristyl myristate, cholesteryl isostearate, dipentaerythrityl hexa(hydroxystearate / stearic acid / rosin acid), and dipentaerythrityl tetra(hydroxystearate / isostearate).

[0044] 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.

[0045] Examples of the silicone oil that is solid at 25° C. include highly polymerized dimethicone and dimethiconol.

[0046] The content of component (F) is 1.0% by mass or less, relative to 100% by mass of the oil-in-water emulsion cosmetic of the present invention. By having the content of component (F) be 1.0% by mass or less, the texture upon application can be further improved. The oil-in-water emulsion cosmetic of the present invention does not need to contain component (F) (i.e., the content of component (F) may be 0% by mass). When the oil-in-water emulsion cosmetic of the present invention contains component (F), the content of component (F) may be, for example, 0.1% by mass or more.

[0047] <Ingredients (G)> Component (G) is a nonionic surfactant. Component (G) acts as an emulsifier to form an oil-in-water emulsion system. Component (G) may be used alone or in combination of two or more.

[0048] Examples of component (G) include sorbitan fatty acid esters, glycerin fatty acid esters, and alkylene oxide adducts thereof, polyoxyalkylene alkyl ethers, polyoxyalkylene fatty acid esters, polyoxyalkylene alkylphenols, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene alkylphenyl formaldehyde condensates, polyoxyethylene sterol and derivatives thereof, polyoxyethylene lanolin and derivatives thereof, alkyl glucosides, polyoxyethylene beeswax derivatives, sugar esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene castor oil, and the like.

[0049] Examples of the sorbitan fatty acid ester include sorbitan monooleate, sorbitan monostearate, sorbitan monoisostearate, sorbitan monopalmitate, sorbitan monolaurate, sorbitan trioleate, sorbitan tristearate, sorbitan sesquistearate, sorbitan sesquioleate, sorbitan sesquiisostearate, and coconut oil fatty acid sorbitan. Examples of the alkylene oxide adducts of the sorbitan fatty acid ester include polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan monoisostearate, polyoxyethylene sorbitan monococonut oil fatty acid, polyoxyethylene sorbitan tristearate, and polyoxyethylene sorbitan trioleate.

[0050] The glycerin fatty acid ester includes both monoglycerin fatty acid esters and polyglycerin fatty acid esters. Examples of the monoglycerin fatty acid esters include glyceryl monocaprylate, glyceryl monocaprate, glyceryl monolaurate, glyceryl monomyristate, glyceryl monopalmitate, glyceryl monostearate, glyceryl monoisostearate, glyceryl monobehenate, glyceryl monooleate, glyceryl monoerucate, glyceryl sesquioleate, glyceryl distearate, glyceryl diisostearate, and glyceryl diarachate. Examples of the polyglycerol fatty acid ester include polyglycerol fatty acid esters having a degree of polymerization of 2 to 10, such as diglyceryl monocaprylate, decaglyceryl monocaprylate, hexaglyceryl monocaprate, tetraglyceryl monolaurate, hexaglyceryl monolaurate, decaglyceryl monolaurate, poly(4-10)glyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, decaglyceryl monoisostearate, poly(2-10)glyceryl monostearate, diglyceryl monooleate, hexaglyceryl monooleate, diglyceryl sesquioleate, poly(2-10)glyceryl diisostearate, poly(6-10)glyceryl distearate, diglyceryl triisostearate, and poly(10)glyceryl tristearate. Examples of the alkylene oxide adducts of the glycerin fatty acid esters include polyoxyethylene glyceryl monostearate and polyoxyethylene glyceryl monooleate.

[0051] Examples of the polyoxyalkylene alkyl ether include polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene polyoxypropylene lauryl ether, polyoxypropylene cetyl ether, polyoxypropylene isocetyl ether, polyoxypropylene stearyl ether, and polyoxypropylene oleyl ether.

[0052] The polyoxyalkylene fatty acid ester includes both polyoxyalkylene mono fatty acid ester and polyoxyalkylene di fatty acid ester. The polyoxyalkylene mono fatty acid ester includes, for example, polyethylene glycol monooleate, polyethylene glycol monostearate, polyethylene glycol monolaurate, etc., polyethylene glycol monostearate, propylene glycol monolaurate, etc., propylene glycol monooleate, etc., propylene glycol monofatty acid ester. The polyoxyalkylene di fatty acid ester includes, for example, polyethylene glycol dilaurate, polyethylene glycol dimyristate, polyethylene glycol dipalmitate, polyethylene glycol distearate, polyethylene glycol diisostearate, polyethylene glycol dibehenate, etc., polyethylene glycol difatty acid ester.

[0053] The alkyl glucoside is not particularly limited, but examples thereof include alkyl glucosides having an alkyl group having 12 to 22 carbon atoms, such as lauryl glucoside, myristyl glucoside, hexadecyl glucoside (cetyl glucoside), octadecyl glucoside (stearyl glucoside), cetearyl glucoside, arachyl glucoside, coconut oil alkyl glucoside, and mixtures thereof, such as alkyl glucosides (number of carbon atoms: 12 to 22).

[0054] The content of component (G) is not particularly limited, but is preferably 0.1 to 5.0% by mass, and more preferably 0.2 to 4.0% by mass, relative to 100% by mass of the oil-in-water emulsion cosmetic of the present invention. When the content of component (G) is 0.1% by mass or more, the emulsion stability is further improved. When the content of component (G) is 5.0% by mass or less, stickiness after application due to component (G) can be suppressed.

[0055] <Component (H)> Component (H) is a water-soluble polymer. By including component (H), the viscosity of the oil-in-water emulsion cosmetic can be adjusted, and for example, it becomes easy to formulate it as a cream. Only one type of component (H) may be used, or two or more types may be used.

[0056] Examples of component (H) include, but are not limited to, gelatin, alginates; polysaccharide polymers such as xanthan gum, guar gum, carrageenan, pectin, and locust bean gum; cellulose-based water-soluble polymers such as methylcellulose, ethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, and carboxymethylcellulose; acrylic water-soluble polymers such as carboxyvinyl polymers, alkyl-modified carboxyvinyl polymers, alkyl acrylate copolymers, (acrylates / steareth-20 methacrylate) copolymers, (acrylates / steareth-20 methacrylate) crosspolymers, (acrylates / alkyl acrylate (C10-30)) crosspolymers, (acrylates / beheneth-25 methacrylate) copolymers, (acrylates / vinyl neodecanoate) crosspolymers, (sodium acrylate / sodium acryloyldimethyltaurate) copolymers, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymers, and polyacrylate crosspolymer-6. Of these, from the viewpoint of further improving emulsion stability, it is preferable that component (H) contains a water-soluble acrylic polymer.

[0057] The content of component (H) is not particularly limited, but from the viewpoint of viscosity adjustment, it is preferably 0.2 to 5.0 mass% and more preferably 0.5 to 4.0 mass% relative to 100 mass% of the oil-in-water emulsion cosmetic of the present invention.

[0058] <Component (I)> Component (I) is a polyhydric alcohol. Component (I) can improve the moisturizing feeling after application of an oil-in-water emulsion cosmetic. Component (I) may be used alone or in combination of two or more.

[0059] Examples of component (I) 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 xylitol, trehalose, maltitol, mannitol, sorbitol, erythritol, arabitol, ribitol, galactitol, glucitol, erythritol, glycosyl trehalose, and hydrogenated starch hydrolysates.

[0060] The content of component (I) is not particularly limited, but is preferably 1.0 to 25.0% by mass, and more preferably 5.0 to 20.0% by mass, relative to 100% by mass of the oil-in-water emulsion cosmetic of the present invention. When the content of component (I) is 1.0% by mass or more, the moisturizing feeling after application can be improved. When the content of component (I) is 25.0% by mass or less, stickiness after application can be further suppressed. In addition, the compatibility of the oil-in-water emulsion cosmetic upon application can be further improved.

[0061] The oil-in-water emulsion cosmetic of the present invention may also contain other components in addition to the above-mentioned components (A) to (I). The other components may include, for example, lower alcohols such as ethanol, surfactants other than component (G) (anionic surfactants, cationic surfactants, amphoteric surfactants, etc.), antioxidants, preservatives, cooling ingredients, blood circulation promoting ingredients, UV absorbers, plant extracts, fragrances, pH adjusters, etc., which may be appropriately blended depending on the purpose. The other components may be used alone or in combination of two or more.

[0062] The method for producing the oil-in-water emulsion cosmetic of the present invention is not particularly limited, and the cosmetic can be produced by a known method. For example, the oil-in-water emulsion cosmetic of the present invention can be produced by adding the above-mentioned components and mixing them using a known mixing device such as a disper mixer or a paddle mixer.

[0063] The oil-in-water emulsion cosmetic of the present invention is preferably a skin cosmetic, and examples thereof include moisturizing cosmetics, cosmetics for improving wrinkles, cleansing cosmetics, cosmetics used for massage, etc. Among these, moisturizing cosmetics are preferred. The properties of the oil-in-water emulsion cosmetic of the present invention are not particularly limited, and examples thereof include creams, milky lotions, gels, gel creams, etc., and creams are particularly preferred.

[0064] The oil-in-water emulsion cosmetic of the present invention is used, for example, as cosmetics, quasi-drugs, medicines, miscellaneous goods, etc. The parts to which the oil-in-water emulsion cosmetic of the present invention is applied are not particularly limited, and examples include the face (forehead, eyes, eye corners, cheeks, mouth, etc.) and the body (arms, elbows, back of hands, fingertips, feet, knees, heels, neck, armpits, back, etc.). Among these, it is particularly preferred to apply it to the face. EXAMPLES

[0065] The present invention will be described in more detail below based on examples, but the present invention is not limited to these examples. The amounts listed in the tables are the amounts of each component (i.e., the amount of active ingredient in each raw material) unless otherwise specified, and are expressed in "mass %". Note that "SIMULGEL NS" and "SIMULGEL EG" are shown as the amounts of the raw materials themselves.

[0066] Examples 1 to 11, Comparative Examples 1 to 10 Oil-in-water emulsion cosmetics of the Examples and Comparative Examples were prepared by ordinary methods according to the compositions shown in Table 1, and subjected to the following evaluation tests. The evaluation results are also shown in Table 1.

[0067] The details of the components listed in Table 1 are as follows: <Component (A)> Tri(caprylic acid / capric acid / myristic acid / stearic acid)glyceryl: Product name "Salacos 334", manufactured by Nisshin Oillio Group Co., Ltd. Tribehenin: Product name "Synchro Wax HR-C-FL-(JP)", manufactured by CRODA <Ingredient (B)> Beeswax: Product name "Kousan Dash Sea Beeswax", manufactured by Miki Chemical Industry Co., Ltd. <Ingredient (C)> Lauroyl glutamate di(octyldodecyl / phytosteryl / behenyl): Product name "Eldew PS-306R", manufactured by Ajinomoto Healthy Supply Co., Ltd. Phytosteryl / octyldodecyl lauroyl glutamate: Product name "Eldew PS-203", manufactured by Ajinomoto Healthy Supply Co., Ltd. <Ingredient (E)> Jojoba seed oil: Product name "NIKKOL Jojoba Oil S", manufactured by Nippon Surfactant Industries Co., Ltd. Squalane: Product name "NIKKOL Sugar Squalane", manufactured by Nippon Surfactant Industries Co., Ltd. Macadamia nut oil: Product name "Macadamia nut oil", manufactured by Summit Oil Company Dimethicone A: Trade name "XIAMETER PMX-200 SILICONE FLUID 1.5CS", manufactured by The Dow Chemical Company Dimethicone B: Trade name "DOWSIL(TM) SH200C FLUID 350CS", manufactured by Dow Chemical Company <Component (F)> Shea butter: Product name "Star Shea Butter refind", manufactured by IMCD Benelux BV Microcrystalline wax: Product name "MULTIWAX W-835", manufactured by Sonneborn Mango seed butter: Product name "Kuro Pure Mango Butter-SO-(JP)", CRODA Company <Component (H)> SIMULGEL NS: Trade name "SIMULGEL NS", manufactured by SEPPIC SA, a raw material containing (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer as component (H), polysorbate 60 and sorbitan isostearate as components (G), squalane as component (E), and water as component (D). Polyacrylate crosspolymer-6: Product name "SEPIMAX ZEN", manufactured by SEPPIC SA SIMULGEL EG: Trade name "SIMULGEL EG", manufactured by SEPPIC SA, a raw material containing (sodium acrylate / sodium acryloyldimethyltaurate) copolymer as component (H), polysorbate 80 and sorbitan oleate as components (G), isohexadecane as component (E), and water as component (D). (Acrylates / C10-30 alkyl acrylate) crosspolymer: Trade name "PEMULEN TR-1", manufactured by Lubrizol

[0068] [evaluation] The oil-in-water emulsion cosmetics obtained in the Examples and Comparative Examples were evaluated for "good penetration feeling when applied," "good application feeling when applied," and "thin film feeling after application" as follows. Each evaluation was performed by three expert evaluators.

[0069] (1) Good penetration when applied Approximately 0.1 g of the oil-in-water emulsion cosmetic obtained in the Examples and Comparative Examples was applied to the inside of the forearm with a fingertip. The application was carried out by moving the finger back and forth over a 5 cm area of ​​the inside of the forearm, and the number of times the cosmetic was moved back and forth until it was felt that the cosmetic had blended with the skin (no longer felt liquid) was evaluated according to the following criteria. <Evaluation criteria> ◎ (Excellent): The liquid feeling disappeared within 10 strokes. ○ (Good): The liquid feeling disappeared between 11 and 60 strokes. × (Poor): After 60 strokes, the liquid feeling was still felt.

[0070] (2) Good texture when applied In the above evaluation (1), the resistance felt between the fingertips and the skin when the cosmetic was absorbed into the skin was evaluated according to the following criteria. Note that cases where the penetration was poor and the resistance could not be evaluated are recorded in Table 1 as "-". <Evaluation criteria> ◎ (Excellent): Low resistance. ○ (Good): There is no sense of resistance, but there is a somewhat strong sense of resistance. × (bad): There is a feeling of resistance, as if something is catching.

[0071] (3) Thin film feel after application The feel of the skin immediately after the cosmetic was absorbed into the skin in the above evaluation (1) was evaluated according to the following criteria. For cosmetic products with poor penetration, the feel of the skin after 60 strokes was evaluated. <Evaluation criteria> ◎ (Excellent): Feels like a flexible coating is tightly attached. ○ (Good): The coating adheres well to the skin, but the skin feels tight. × (bad): No feeling of a coating was felt, or the coating did not adhere to the skin.

[0072] [Table 1]

[0073] The oil-in-water emulsion cosmetic of the Examples had both a good application feel, as if it melted when applied, and a good feeling of penetration, and after application, a thin film feeling was obtained that adhered closely to the skin. On the other hand, when the component (A) was not included or the content ratio of the component (A) was low, the application feel was poor (Comparative Example 1, Comparative Example 7), and when the content ratio of the component (A) was too high, the penetration feeling was also poor (Comparative Example 6). Furthermore, when the component (B) was not included or the content ratio of the component (B) was low, the thin film feeling after application could not be achieved (Comparative Example 2, Comparative Example 9), and when the content ratio of the component (B) was too high, the penetration feeling after application was poor and the thin film feeling could not be achieved (Comparative Example 8). Furthermore, when the component (C) was not included or the content ratio of the component (C) was low, the thin film feeling after application could not be achieved (Comparative Example 3, Comparative Example 10). In addition, when neither component (B) nor component (C) was contained, the product did not exhibit a good application feel upon application (Comparative Example 4), and when neither component (A) nor component (B) was contained, the product did not penetrate well upon application (Comparative Example 5). Furthermore, all of the oil-in-water emulsion cosmetics of the Examples were suppressed from becoming sticky after being absorbed into the skin. More specifically, Examples 1, 3, and 5 to 11 were almost or completely sticky, while Examples 2 and 4 were slightly sticky, but at a level that was not uncomfortable for practical use.

[0074] Formulation examples (total amount 100% by mass) of the oil-in-water emulsion cosmetic of the present invention are shown below. [Table 2]

[0075] Variations of the present invention are described below. [Appendix 1] The composition contains the following components (A), (B), (C), and (D), and the content of the component (A) is 0.1 to 2.5 mass%, the content of the component (B) is 0.3 to 2.0 mass%, and the content of the component (C) is 0.5 to 3.0 mass%, The composition may or may not contain the following component (E), and the content of the component (E) is 10.0 mass% or less, An oil-in-water emulsion cosmetic preparation, which may or may not contain the following component (F), and the content of said component (F) is 1.0 mass % or less: Component (A): A fatty acid triglyceride that is solid at 25°C and in which the fatty acid is a saturated fatty acid with a straight-chain structure. Ingredient (B): Beeswax Component (C): Di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate and / or di(phytosteryl / octyldodecyl) lauroyl glutamate Ingredient (D): Water Ingredient (E): An oily ingredient that is liquid at 25°C Component (F): Oil-based components that are solid at 25°C other than components (A), (B), and (C). [Appendix 2] The oil-in-water emulsion cosmetic according to claim 1, further comprising the following component (G), wherein the content of the component (G) is 0.1 to 5.0% by mass: Component (G): Nonionic surfactant [Appendix 3] The oil-in-water emulsion cosmetic according to claim 1 or 2, further comprising the following component (H), wherein the content of the component (H) is 0.2 to 5.0% by mass: Component (H): Water-soluble polymer [Appendix 4] The composition further contains the following component (I), and the content of the component (I) is 1.0 to 25.0 mass % 4. The oil-in-water emulsion cosmetic according to any one of claims 1 to 3, Component (I): Polyhydric alcohol

Claims

1. The composition contains the following components (A), (B), (C), and (D), and the content of the component (A) is 0.1 to 2.5% by mass, the content of the component (B) is 0.3 to 2.0% by mass, and the content of the component (C) is 0.5 to 3.0% by mass, The composition may or may not contain the following component (E), and the content of the component (E) is 10.0 mass% or less, An oil-in-water emulsion cosmetic preparation comprising the following component (F), or not comprising the following component (F), in which the content of the component (F) is 1.0 mass % or less: Component (A): A fatty acid triglyceride that is solid at 25°C and in which the fatty acid is a saturated fatty acid with a straight-chain structure. Component (B): Beeswax Component (C): di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate and / or di(phytosteryl / octyldodecyl) lauroyl glutamate Component (D): water Component (E): An oily component that is liquid at 25°C Component (F): An oil-based component that is solid at 25°C other than components (A), (B), and (C).

2. The oil-in-water emulsion cosmetic according to claim 1, further comprising the following component (G), wherein the content of said component (G) is 0.1 to 5.0% by mass: Component (G): Nonionic surfactant

3. 3. The oil-in-water emulsion cosmetic according to claim 1, further comprising the following component (H), wherein the content of said component (H) is 0.2 to 5.0% by mass: Component (H): Water-soluble polymer

4. 3. The oil-in-water emulsion cosmetic according to claim 1, further comprising the following component (I), wherein the content of said component (I) is 1.0 to 25.0% by mass: Component (I): Polyhydric alcohol

Images