Oil-in-water type cosmetic emulsion preparation

Abstract

To provide an oil-in-water type cosmetic emulsion preparation that offers superior penetration sensation while maintaining long-lasting moisturizing effect.SOLUTION: An oil-in-water type cosmetic emulsion preparation comprising the following ingredients (A) to (D): (A) 1-10 mass% of niacinamide and / or tranexamic acid; (B) a silicone oil; (C) one or two or more glycerin derivatives selected from an ingredient (c1) represented by the general formula (1) and an ingredient (c2) represented by the general formula (2); and (D) an amphipathic polymer. General formula (1). General formula (2).SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] Internal factors such as aging and stress, as well as external factors such as ultraviolet rays and dry air, can cause skin to develop wrinkles, sagging, and pigmentation such as age spots and freckles. Morphological changes such as wrinkles and sagging, and visual changes such as pigmentation, have a significant impact on the appearance of the skin, so many people desire to improve these changes, and a variety of products are available.

[0003] Many active ingredients have been proposed to prevent and improve wrinkles, sagging, and pigmentation. Among these, niacinamide, an active ingredient for wrinkles and sagging, is known to be highly safe and effective in preventing skin aging. Tranexamic acid has also been proposed as a whitening agent that improves or inhibits pigmentation. However, it is known that products containing large amounts of niacinamide or tranexamic acid can have undesirable textures, such as stickiness.

[0004] In response to this, a technology has been disclosed that combines niacinamide, silicone oil with a viscosity of 25 mPa·s or less at 25°C, polyether-modified silicone, and carboxymethyl cellulose to improve wrinkles and reduce stickiness (see, for example, Patent Document 1). Furthermore, a technology has been disclosed for a lotion that has a wrinkle-improving effect and a penetrating feel upon use, by combining two types of alkylene oxide derivatives, a 2-methacryloyloxyethyl phosphorylcholine-butyl methacrylate copolymer, and a polyhydric alcohol (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-77675 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-74620 Summary of the Invention [Problem to be solved by the invention]

[0006] However, even with the techniques disclosed in Patent Documents 1 and 2, there are cases where the penetration feeling and moisturizing feeling are not sufficiently sustained.

[0007] Therefore, an object of the present invention is to provide an oil-in-water emulsion cosmetic that uses one or more members selected from niacinamide and / or tranexamic acid, silicone oil, and polyoxyalkylene-added glycerin derivatives represented by a specific formula, and an amphiphilic polymer, and that has excellent penetration and long-lasting moisturizing effect. [Means for solving the problem]

[0008] In view of these circumstances, the present inventors conducted extensive research and discovered that the above-mentioned problems can be solved by adding silicone oil, one or more polyoxyalkylene-added glycerin derivatives represented by a specific formula, and an amphiphilic polymer to an oil-in-water emulsion cosmetic containing niacinamide and / or tranexamic acid as active ingredients, and thus completed the present invention.

[0009] That is, the present invention provides an oil-in-water emulsion cosmetic containing active ingredients for wrinkles, sagging skin, and whitening, which not only provides a moisturizing feeling immediately after application, but also has excellent long-lasting moisturizing feeling and penetration, and is characterized by containing the following components (A) to (D): [1] The following components (A) to (D): (A) niacinamide and / or tranexamic acid 1 to 10% by mass (B) Silicone oil (C) One or more glycerin derivatives selected from component (c1) and component (c2) represented by the following general formula: Component (c1) general formula (1) [ka] ···(1) (In formula (1), Gly is a residue obtained by removing a hydroxyl group from glycerin, PO is an oxypropylene group, EO is an oxyethylene group, l and m are the average number of moles of PO and EO added, respectively, (l+m) is a value of 1 to 60, the mass ratio (PO / EO) is 1 / 5 to 5 / 1, BO is an oxyalkylene group having 4 carbon atoms, and n is the average number of moles of BO added and is a value of 0 to 5.) Component (c2) general formula (2) [ka] ···(2) (In formula (2), R represents -[CH2CH(CH3)O]-, p, q, r, and s each represent an integer of 0 to 20, and p+q+r+s represents an integer of 4 to 20.) (D) Amphiphilic polymers The oil-in-water emulsion cosmetic contains [2] The oil-in-water emulsion cosmetic according to [1], wherein the component (D) is at least one selected from the group consisting of acrylic acid / alkyl methacrylate copolymer, ammonium acryloyldimethyltaurate / vinylpyrrolidone copolymer, ammonium acryloyldimethyltaurate / beheneth-25 methacrylate copolymer, hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer, sodium acrylate / sodium acryloyldimethyltaurate copolymer, PEG-240 / decyltetradeceth-20 / hexamethyl diisocyanate copolymer, hydrophobized hydroxypropyl cellulose, and hydroxypropyl starch phosphate. [3] The oil-in-water emulsion cosmetic according to [1] or [2], wherein the content of the component (B) is 60 mass % or more based on the total amount of oil contained in the oil-in-water emulsion cosmetic. [4] The oil-in-water emulsion cosmetic according to any one of [1] to [3], wherein the content of the component (C) in the oil-in-water emulsion cosmetic is 1 to 20% by mass. [5] The oil-in-water emulsion cosmetic according to any one of [1] to [4], wherein the content of the component (D) in the oil-in-water emulsion cosmetic is 0.01 to 0.4% by mass. [6] The oil-in-water emulsion cosmetic according to any one of [1] to [5], wherein niacinamide and tranexamic acid are used in combination as the component (A). [7] The oil-in-water emulsion cosmetic according to any one of [1] to [6], wherein the content mass ratio (A) / [(B)+(C)] of the components (A) to (C) is 0.05 or more and less than 7. [8] The oil-in-water emulsion cosmetic according to any one of [1] to [7], wherein the content mass ratio of the components (A) to (D), [(B)+(C)+(D)] / (A), is 0.1 or more and 20 or less. [9] The oil-in-water emulsion cosmetic according to any one of [1] to [8], further comprising component (E) polyglycerin. [Effects of the Invention]

[0010] The oil-in-water emulsion cosmetic of the present invention has an excellent penetration feeling, and also has an excellent moisturizing feeling immediately after application and a long-lasting moisturizing feeling. Furthermore, the oil-in-water emulsion cosmetic of the present invention is not sticky after use and can provide a good feeling in use. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described. However, the present invention is not limited to only the following embodiments. In this specification, the range "X to Y" includes X and Y and means "X or more and Y or less." Furthermore, unless otherwise specified, operations and measurements of physical properties, etc. are performed under conditions of room temperature (25°C) and relative humidity of 40%RH.

[0012] (Component (A) Niacinamide and / or Tranexamic Acid)

[0013] Niacinamide, the component (A) used in the present invention, is an amide compound of nicotinic acid (vitamin B3 / niacin). Niacinamide is a water-soluble vitamin and a known substance that is a member of the B vitamin family. It can be extracted from natural products (such as rice bran) or synthesized by known methods. Specifically, niacinamide listed in the 17th edition of the Japanese Pharmacopoeia can be used.

[0014] Tranexamic acid, the component (A) used in the present invention, is a type of amino acid with the chemical name trans-4-(aminomethyl)cyclohexane-1-carboxylic acid. As mentioned above, it is known to have whitening and anti-inflammatory effects on the skin, and is also sometimes used as a hemostatic agent.

[0015] In the present invention, from the viewpoint of the efficacy of the active ingredient, the content of component (A) in the oil-in-water emulsion cosmetic is preferably 1% by mass (hereinafter, simply "% by mass" will be abbreviated as "%") or more, more preferably 2% or more, and even more preferably 5% or more. Furthermore, the content of component (A) is preferably 10% or less, more preferably 8% or less, and even more preferably 7% or less. If the content of component (A) is less than 1%, the effect of the active ingredient may not be satisfactory, whereas if it exceeds 10%, the product may be very sticky upon application and have a poor feel in use. In the present invention, component (A) niacinamide and tranexamic acid can be used alone or in combination. From the viewpoint of their excellent effects as active ingredients, such as skin anti-aging effects and whitening effects, it is preferable to use two of them in combination. When niacinamide and tranexamic acid are used in combination as component (A), there is a preferred range for the content of each. In the present invention, from the viewpoint of their effects as active ingredients, the content of component (A) niacinamide in the oil-in-water emulsion cosmetic is preferably 1% or more, more preferably 2% or more, even more preferably 3% or more, and particularly preferably 4% or more. Furthermore, it is preferably less than 10%, more preferably 7% or less, and from the viewpoint of usability such as non-stickiness, it is even more preferably 5% or less. Furthermore, from the viewpoint of their effects as active ingredients, the content of component (A) tranexamic acid in the oil-in-water emulsion cosmetic is preferably 1% or more, more preferably 1.5% or more, and even more preferably 2% or more. Furthermore, it is preferably less than 10%, more preferably 5% or less, and from the viewpoint of feeling when used such as non-stickiness, it is even more preferably 3% or less.

[0016] (Component (B) Silicone oil)

[0017] The silicone oil of component (B) used in the present invention is not particularly limited as long as it is one normally used in cosmetics. The state of the silicone oil is not particularly limited, but from the viewpoint of excellent usability, it is more preferable that it is liquid at 25°C. Examples of such silicone oils include dimethicone, methylphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, methyltrimethicone, polyether-modified methylpolysiloxane, oleyl-modified methylpolysiloxane, polyvinylpyrrolidone-modified methylpolysiloxane, octamethylcyclotetrasiloxane, dodecamethylcyclohexasiloxane, hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, caprylyl trimethicone, methylphenylpolysiloxane, and dimethiconol, and one or more of these can be appropriately selected and used. In the present invention, it is preferable to use methylphenylpolysiloxane and / or dimethicone, and it is more preferable to use dimethicone because it significantly enhances the penetration feeling and sustained moisturizing feeling.

[0018] The viscosity of the dimethicone used in the present invention is not particularly limited, but from the viewpoint of penetration sensation, the viscosity at 25°C is preferably 1 to 200 mPa·s, and more preferably 2 to 100 mPa·s. The viscosity of component (B) is measured in accordance with Method 2 of the Viscosity Measurement Methods of Cosmetic Raw Materials Standards using a Brookfield viscometer.

[0019] In the oil-in-water emulsion cosmetic of the present invention, even if component (B) is contained in an amount of 60% or more of the total amount of oil contained in the oil-in-water emulsion cosmetic, it is possible to obtain an oil-in-water emulsion cosmetic that is non-sticky and has excellent penetration and moisturizing properties. Furthermore, in the system of this embodiment, it is preferable that component (B) accounts for 60% or more of the total amount of oil contained in the oil-in-water emulsion cosmetic. Therefore, the content of component (B) in the total amount of oil contained in the oil-in-water emulsion cosmetic is, in order of preference, 60% or more, 70% or more, 80% or more, 85% or more, and 90% or more. The upper limit of the content of component (B) in the total amount of oil contained in the oil-in-water emulsion cosmetic is 100%.

[0020] Examples of oils other than component (B) include hydrocarbon oils such as isododecane, isohexadecane, light isoparaffin, liquid paraffin, squalane, squalene, α-olefin oligomer, polybutene, liquid isoparaffin, heavy liquid isoparaffin, polyisobutylene, and hydrogenated polyisobutene; fatty acids such as oleic acid and isostearic acid; higher alcohols such as oleyl alcohol, 2-octyldodecanol, 2-decyltetradecanol, isostearyl alcohol, and 2-hexyldecanol; fluorine-based oils such as perfluoropolyether, perfluorodecane, and perfluorooctane; lanolin derivatives such as lanolin acetate, lanolin fatty acid isopropyl, and lanolin alcohol; glyceryl tri-2-ethylhexanoate, glyceryl diisostearate, diglyceryl diisostearate, glyceryl triisostearate, diglyceryl triisostearate, and triisostearate. Trimethylolpropane Phosphate, Diglyceryl Tetraisostearate, Polyglyceryl Decaisostearate, Isotridecyl Isononanoate, Pentaerythritol Tetraisostearate, Pentaerythritol Tetraisostearate, Cetyl 2-Ethylhexanoate, Octyldodecyl Oleate, Caprylic / Capric Triglyceride, Propylene Glycol Dicaprate, Isopropyl Myristate, Isopropyl Palmitate Ester oils that are liquid at 25°C, such as octyldodecyl myristate, isocetyl stearate, neopentyl glycol dioctanoate, di-2-ethylhexyl succinate, 2-ethylhexyl paramethoxycinnamate, and ethylhexyl salicylate; vegetable oils that are liquid at 25°C, such as olive oil, macadamia nut oil, meadowfoam oil, jojoba oil, avocado oil, castor oil, safflower oil, sunflower oil, canola oil, apricot kernel oil, rice germ oil, and rice bran oil;Cocoa butter, shea butter, castor oil, hydrogenated castor oil, hydrogenated coconut oil, petrolatum, hydrogenated castor oil monostearate, hydrogenated castor oil monohydroxystearate, cholesteryl hydroxystearate, dipentaerythrityl fatty acid ester, N-lauroyl-L-glutamic acid - di (octyldodecyl / cholesteryl / behenyl), N-lauroyl-L-glutamic acid - di (octyldodecyl / phytosteryl / behenyl), macadamia nut oil fatty acid phytosteryl, dimer dilinoleic acid (phytosteryl) Examples of suitable oils include paste-like oils such as oleic acid, oleic acid, oleic acid (isostearyl / isostearyl / cetyl / stearyl / behenyl), and solid oils that are solid at 25°C, such as paraffin wax, ceresin wax, microcrystalline wax, polyethylene wax, Fischer-Tropsch wax, stearic acid, behenic acid, cetyl palmitate, polyethylene glycol distearate, glyceryl tribehenate, cholesterol, phytosterol, stearyl-modified polysiloxane, hydrogenated oil, petrolatum, and palm oil. One or more of these may be used.

[0021] In the present invention, the total content of oils consisting of component (B) and oils other than component (B) is not particularly limited, but from the viewpoints of non-stickiness and sustained moisturizing feeling, it is preferably 0.2% or more, more preferably 0.5% or more, and even more preferably 1% or more in the oil-in-water emulsion cosmetic. Furthermore, from the viewpoints of penetration feeling and moisturizing feeling immediately after application, the total content of oils consisting of component (B) and oils other than component (B) in the oil-in-water emulsion cosmetic is preferably 20% or less, more preferably 10% or less, and even more preferably 7% or less.

[0022] Furthermore, in consideration of factors such as the penetration sensation and sustained moisturizing sensation, it is preferable that the hydrocarbon oil content be as low as possible. For example, the hydrocarbon oil content in the oil-in-water emulsion cosmetic is preferably less than 1%, more preferably 0.5% or less, and preferably no hydrocarbon oil (0%).

[0023] The content of silicone oil (component (B)) in the present invention is not particularly limited, but is preferably 0.1% or more, and more preferably 0.5% or more, in the oil-in-water emulsion cosmetic from the viewpoint of maintaining a moisturizing feeling, etc. Furthermore, the content of component (B) in the oil-in-water emulsion cosmetic is preferably 10% or less, and more preferably 5% or less, in the viewpoint of reducing stickiness and achieving a good penetration feeling.

[0024] (Component (C): One or more glycerin derivatives selected from (c1) and (c2) represented by the following general formulas)

[0025] The component (C) used in the present invention is one or more glycerin derivatives selected from the component (c1) and the component (c2) represented by the following general formula: Component (c1) general formula (1) [ka] ···(1) (In formula (1), Gly is a residue obtained by removing a hydroxyl group from glycerin, PO is an oxypropylene group, EO is an oxyethylene group, l and m are the average number of moles of PO and EO added, respectively, (l+m) is a value of 1 to 60, the mass ratio (PO / EO) is 1 / 5 to 5 / 1, BO is an oxyalkylene group having 4 carbon atoms, and n is the average number of moles of BO added and is a value of 0 to 5.) Component (c2) general formula (2) [ka] ···(2) (In formula (2), R represents -[CH2CH(CH3)O]-, p, q, r, and s each represent an integer of 0 to 20, and p+q+r+s represents an integer of 4 to 20.)

[0026] That is, component (c1) is a compound obtained by adding propylene oxide and ethylene oxide to glycerin in a total amount of 3 to 180 molar equivalents relative to the glycerin, or by further adding an alkylene oxide having 4 carbon atoms in a total amount of 0 to 15 molar equivalents relative to the glycerin. The glycerin derivative of component (c1) can be obtained by first synthesizing an adduct of PO and EO, and then adding an alkylene oxide having 4 carbon atoms in block form.

[0027] The mass ratio (PO / EO) of propylene oxide (PO) to ethylene oxide (EO) in component (c1) is 1 / 5 to 5 / 1, and the addition form of propylene oxide and ethylene oxide may be random or block. If the mass ratio (PO / EO) of propylene oxide (PO) to ethylene oxide (EO) is less than 1 / 5, the penetration feeling, moisturizing feeling immediately after application, and the durability of the moisturizing feeling decrease, while if it exceeds 5 / 1, the non-stickiness and penetration feeling decrease.

[0028] The average number of added moles of propylene oxide (PO) and ethylene oxide (EO) in component (c1) is preferably 3 to 180 moles in total, i.e., l + m is in the range of 1 to 60. From the viewpoint of penetration feeling and moisturizing feeling, etc., the average number of added moles of PO and EO is more preferably 3 to 150 moles in total, i.e., l + m is in the range of 1 to 50, and even more preferably 3 to 90 moles in total, i.e., l + m is in the range of 1 to 30. If the average number of added moles of PO and EO is less than 3 moles in total, i.e., l + m is less than 1, the lack of stickiness and penetration feeling may be poor. If the average number of added moles is 180 moles in total, i.e., l + m is more than 60, the moisturizing feeling immediately after application and the long-lasting moisturizing feeling may be poor.

[0029] The average number of moles of propylene oxide (PO) added in component (c1) is preferably 3 to 90 moles, i.e., l is in the range of 1 to 30, and more preferably 3 to 60 moles, i.e., l is in the range of 1 to 20. By setting the average number of moles of PO added in component (c1) in this range, the effects of the present invention, such as non-stickiness, penetration feeling, moisturizing feeling immediately after application, and sustained moisturizing feeling, are preferably exhibited more favorably.

[0030] The average number of added moles of alkylene oxide (BO) having 4 carbon atoms in component (c1) is preferably 0 to 15 moles, i.e., n is preferably in the range of 0 to 5, and the average number of added moles of BO is more preferably 3 to 15 moles, i.e., n is preferably in the range of 1 to 5. If the average number of added moles of BO is 15 moles, i.e., n exceeds 5, the non-stickiness and penetration feeling may not be excellent.

[0031] In the present invention, when the average number of added moles of alkylene oxide (BO) having 4 carbon atoms is 0 moles, i.e., n is 0, the average number of added moles of propylene oxide (PO) and ethylene oxide (EO) is preferably 90 to 180 moles in total, i.e., l + m is in the range of 30 to 60, and more preferably, the average number of added moles of PO and EO is 90 to 150 moles in total, i.e., l + m is in the range of 30 to 50. Furthermore, when the average number of added moles of BO is 1 to 5 moles, i.e., n is in the range of 1 to 5, the average number of added moles of PO and EO is preferably 3 to 90 moles in total, i.e., l + m is in the range of 1 to 30, and more preferably, the average number of added moles of PO and EO is 3 to 60 moles in total, i.e., l + m is in the range of 1 to 20. By setting the moles in the above ranges, the effects of the present invention, such as non-stickiness, penetration feeling, moisturizing feeling immediately after application, and sustained moisturizing feeling, are more preferably exhibited.

[0032] Examples of the alkylene oxide having 4 carbon atoms of the component (c1) include 1,2-butylene oxide, 2,3-butylene oxide, tetramethylene oxide (tetrahydrofuran), etc. Among these, 1,2-butylene oxide is preferred from the viewpoints of availability and ease of reaction control.

[0033] Specific examples of component (c1) include polyoxybutylene polyoxyethylene polyoxypropylene glyceryl ether (3BO)(8EO)(5PO), which has an average number of moles of (EO) added of 8, an average number of moles of (PO) added of 5, and an average number of moles of (BO) added of 3, and polyoxyethylene polyoxypropylene glyceryl ether (24EO)(24PO), which has an average number of moles of (EO) added of 24 and an average number of moles of (PO) added of 24, because these ethers improve penetration, moisturizing sensation immediately after application, and sustained moisturizing sensation. Examples of commercially available products include polyoxyethylene (24) polyoxypropylene (24) glyceryl ether (trade name: NIKKOL SG-G2424, manufactured by Nikko Chemicals Co., Ltd.) and polyoxybutylene (3) polyoxyethylene (8) polyoxypropylene (5) glyceryl ether (trade name: Wilbride S-753, manufactured by NOF Corporation). One or more of these ethers may be used.

[0034] Component (c2) of the present invention can be obtained by adding propylene oxide to diglycerin by a conventional method. Here, the number of moles of propylene oxide added per molecule of diglycerin is preferably 4 to 20 moles, more preferably 5 to 15 moles, even more preferably 8 to 15 moles, and even more preferably 8 to 10 moles, from the viewpoints of non-stickiness, penetration feeling, moisturizing feeling, etc.

[0035] Specifically, polyoxypropylene diglyceryl (9PO), in which the average number of moles of (PO) added is 9, is preferred as component (c2) because it improves penetration, moisturizing feeling immediately after application, and sustained moisturizing feeling. Commercially available products include polyoxypropylene (9) diglyceryl (trade name: SY-DP9, manufactured by Sakamoto Pharmaceutical Industry Co., Ltd.). One or more of these may be used.

[0036] Regarding the glycerin derivatives of the above-mentioned components (c1) and (c2), when alkylene oxide is added to glycerin or diglycerin, the addition reaction is carried out using an alkali catalyst, phase transfer catalyst, Lewis acid catalyst, etc. In general, it is preferable to use an alkali catalyst such as potassium hydroxide.

[0037] In the present invention, component (C) can contain one or more selected from component (c1) and component (c2). In the present invention, component (C) is preferably component (c1), from the viewpoint of more suitably exhibiting effects such as sustained moisturizing feeling. In addition, in the present invention, containing two types of component (C) may mean two types of component (c1), two types of component (c2), or a combination of component (c1) and component (c2).

[0038] The content of component (C) of the present invention is not particularly limited, but from the viewpoints of non-stickiness, penetration feeling, etc., it is preferably 1% or more in the oil-in-water emulsion cosmetic, more preferably 2% or more, and even more preferably 3% or more. Furthermore, the content of component (C) is more preferably 20% or less, and from the viewpoints of moisturizing feeling immediately after application and sustained moisturizing feeling, etc., it is preferably 15% or less, even more preferably 10% or less.

[0039] The content mass ratio (A) / [(B)+(C)] of components (A) to (C) is not particularly limited, but is preferably 0.05 or more, more preferably 0.1 or more, and from the viewpoints of non-stickiness, penetration feeling, etc., it is even more preferably 0.2 or more, and particularly preferably 0.3 or more. From the viewpoints of moisturizing feeling immediately after application and sustained moisturizing feeling, etc., the content mass ratio (A) / [(B)+(C)] is preferably less than 7, more preferably 5 or less, even more preferably 3.5 or less, and particularly preferably 2.5 or less.

[0040] (Component (D) Amphiphilic Polymer)

[0041] The amphiphilic polymer (component (D)) used in the present invention is a polymeric compound that can form a stable oil-in-water emulsion in cosmetics and compositions, either alone without a surfactant or with a small amount of surfactant. Examples include acrylic acid / alkyl methacrylate copolymer, ammonium acryloyldimethyltaurate / vinylpyrrolidone copolymer, ammonium acryloyldimethyltaurate / beheneth-25 methacrylate copolymer, hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer, sodium acrylate / sodium acryloyldimethyltaurate copolymer, PEG-240 / decyltetradeceth-20 / hexamethyldiisocyanate copolymer, hydrophobized hydroxypropyl cellulose, hydroxypropyl starch phosphate, and 2-methacryloyloxyphosphorylcholine / butyl methacrylate copolymer. At least one of these components can be used.

[0042] Among these, from the viewpoints of penetration sensation and sustained moisturizing sensation, component (D) is preferably an acrylic acid / alkyl methacrylate copolymer, ammonium acryloyldimethyltaurate / vinylpyrrolidone copolymer, ammonium acryloyldimethyltaurate / beheneth-25 methacrylate copolymer, hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer, or sodium acrylate / sodium acryloyldimethyltaurate copolymer; more preferably an acrylic acid / alkyl methacrylate copolymer, ammonium acryloyldimethyltaurate / beheneth-25 methacrylate copolymer, or sodium acrylate / sodium acryloyldimethyltaurate copolymer; and even more preferably an acrylic acid / alkyl methacrylate copolymer or ammonium acryloyldimethyltaurate / beheneth-25 methacrylate copolymer. Commercially available products that can be used include Aristoflex HMB (Clariant Japan Co., Ltd.) and PEMULEN TR-1 (Lubizol Advanced Materials), and one or more of these may be used.

[0043] The content of component (D) of the present invention is not particularly limited, but is preferably 0.01% or more in the oil-in-water emulsion cosmetic, and more preferably 0.05% or more from the viewpoint of sustained moisturizing feeling, etc. The content of component (D) is preferably 0.6% or less, and from the viewpoint of penetration feeling, etc., more preferably 0.4% or less, and even more preferably 0.2% or less.

[0044] Furthermore, in oil-in-water emulsion cosmetics containing component (A) of the present invention, it is important to combine it with components (B) to (D) from the viewpoint of optimally exerting the effects of the present invention. In the present invention, the content mass ratio of components (A) to (D) [(B) + (C) + (D)] / (A) is not particularly limited, but is preferably 0.1 or greater. From the viewpoints of moisturizing feeling immediately after application and sustained moisturizing feeling, it is more preferably 0.2 or greater, even more preferably 0.3 or greater, and particularly preferably 0.4 or greater. From the viewpoints of non-stickiness and penetration feeling, the content mass ratio [(B) + (C) + (D)] / (A) is preferably 20 or less, more preferably 10 or less. From the viewpoints of moisturizing feeling immediately after application and sustained moisturizing feeling, it is even more preferably 5 or less, and particularly preferably 3 or less.

[0045] (Component (E) Polyglycerin)

[0046] The oil-in-water emulsion cosmetic of the present invention can be made to have excellent penetration, moisturizing feeling immediately after application, and sustained moisturizing feeling by further using component (E) polyglycerin. In the present invention, polyglycerin refers to a dimer or higher of glycerin, and examples thereof include diglycerin, triglycerin (a trimer of glycerin), tetraglycerin (a tetramer of glycerin), hexaglycerin (a hexamer of glycerin), decaglycerin (a decamer of glycerin), and eicosaglycerin (a 20amer of glycerin), and one or more of these can be used. In the present invention, from the viewpoint of non-stickiness, etc., one or more selected from diglycerin and triglycerin are preferred, and from the viewpoint of penetration, moisturizing feeling immediately after application, and sustained moisturizing feeling, etc., triglycerin is more preferred. Examples of commercially available products include Diglycerin 801 and PGL-S (both manufactured by Sakamoto Pharmaceutical Industry Co., Ltd.).

[0047] The content of component (E) of the present invention is not particularly limited, but is preferably 0.1% or more in the oil-in-water emulsion cosmetic, and from the viewpoints of penetration feeling, moisturizing feeling immediately after application, and sustained moisturizing feeling, it is more preferably 0.5% or more, and even more preferably 1% or more. Furthermore, the content of component (E) is preferably 5% or less, and from the viewpoints of non-stickiness and penetration feeling, it is more preferably 3% or less, and even more preferably 2% or less.

[0048] In the present invention, the content mass ratio (C) / (E) of components (C) and (E) is not particularly limited, but from the viewpoints of moisturizing feeling immediately after application and the duration of moisturizing feeling, it is preferably 1 or more, more preferably 2 or more, and even more preferably 3 or more. From the viewpoints of non-stickiness and penetration feeling, the content mass ratio (C) / (E) is preferably 15 or less, more preferably 10 or less, and even more preferably 7 or less.

[0049] The present invention relates to an oil-in-water emulsion cosmetic that contains water. The water used here is used as a dispersion medium for oily agents, and is not particularly limited as long as it is water that is commonly used in cosmetics, but examples include purified water, distilled water, ion-exchanged water, tap water, hot spring water, and deep-sea water. The water content in the oil-in-water emulsion cosmetic is not particularly limited, but is preferably 10 to 80%, and more preferably 20 to 70%.

[0050] Furthermore, the oil-in-water emulsion cosmetic of the present invention may contain a surfactant within a range that does not impair the effects of the present invention. The surfactant can improve the stability of the oil-in-water emulsion cosmetic, and any surfactant that is typically used in cosmetics, quasi-drugs, pharmaceuticals, etc. may be incorporated without any particular restrictions. However, from the viewpoints of improving stability, usability (e.g., stickiness and penetration feeling), and sustained moisturizing feeling, the surfactant content is preferably 3% or less, and more preferably 1% or less.

[0051] In addition to the essential components described above, the oil-in-water emulsion cosmetic of the present invention can contain components that are typically used in cosmetics, quasi-drugs, pharmaceuticals, etc., within a range that does not impair the effects of the present invention. That is, the oil-in-water emulsion cosmetic of the present invention can appropriately contain, for example, surfactants, higher alcohols, water-soluble polymers other than component (D), lower alcohols, polyhydric alcohols, film-forming agents, powders, resins, fragrances, deodorants, cooling agents, UV absorbers, pH adjusters, preservatives, chelating agents, plant extracts, amino acids, vitamins, cosmetic ingredients, etc., within a range that does not impair the effects of the present invention.

[0052] The oil-in-water emulsion cosmetic of the present invention can be used as a cosmetic for a variety of purposes. Examples of such cosmetics include lotions, emulsions, creams, beauty serums, massage cosmetics, pack cosmetics, hand creams, body lotions, body creams, makeup cosmetics, makeup bases, eye creams, and sunscreens. Of these, skin care cosmetics such as lotions, emulsions, creams, beauty serums, massage cosmetics, pack cosmetics, hand creams, body lotions, and body creams are preferred. Methods of use include applying the cosmetic to hands, fingers, or cotton, or impregnating nonwoven fabrics or the like.

[0053] The oil-in-water emulsion cosmetic of the present invention can be in various forms, such as liquid, gel, emulsion, cream, semi-solid, or solid, and is preferably in a liquid to gel state in order to obtain the effects of the present invention. Here, a liquid to gel state means a state having a viscosity of 30,000 mPa·s or less, preferably 20,000 mPa·s or less, and more preferably 15,000 mPa·s or less, as measured at 25°C using a Brookfield rotational viscometer.

[0054] (Manufacturing method) The method for producing the oil-in-water emulsion cosmetic of the present invention is not particularly limited, and can be produced by any commonly known method, specifically including dispersion emulsification, phase inversion emulsification, and phase inversion temperature emulsification. Any dispersion / emulsification equipment, such as that used in general dispersions, may be used for the production. For example, an oil phase in which component (B) has been heated and dissolved is added to an aqueous phase in which components (C) to (E) and a portion of purified water have been mixed and dissolved, and the mixture is emulsified and mixed using a dispersion mixer. After cooling, component (A) dissolved in purified water is added, thereby obtaining an oil-in-water emulsion cosmetic. [Example]

[0055] The effects of the present invention will be explained using the following examples and comparative examples. However, the technical scope of the present invention is not limited to the following examples. Unless otherwise specified, each operation is carried out at room temperature (25°C). Examples 1 to 24 and Comparative Examples 1 to 9: Oil-in-water emulsion cosmetics Oil-in-water emulsion cosmetics were prepared according to the formulations shown in Tables 1 to 3 below, and were evaluated for non-stickiness, penetration, moisturizing feeling immediately after application, and duration of moisturizing feeling using the methods described below. The results are also shown in Tables 1 to 3.

[0056] [Table 1]

[0057] [Table 2]

[0058] [Table 3] *1 CARNATION (SONNEBORN) Note 2 Wilbride S-753D (NOF Corporation) Note 3: NIKKOL SG-G2424 (manufactured by Nikko Chemicals Co., Ltd.) Note 4: SY-DP9 (manufactured by Sakamoto Pharmaceutical Co., Ltd.) *5 LIPONIC EG-1 (Lipo Chemicals) *6 PEMULEN TR-1 (manufactured by Lubrizol Advanced Materials) Note 7: Aristoflex HMB (Clariant Japan Co., Ltd.) Note 16 PGL-S (manufactured by Sakamoto Pharmaceutical Co., Ltd.)

[0059] (Manufacturing method) A: Mix and dissolve components (6) to (19) and a portion of component (20) to homogeneity. B: Mix and dissolve components (3) to (5) uniformly. C: B was added to A to emulsify, and then the remaining component (20) dissolved in components (1) and (2) was added and mixed to obtain an oil-in-water emulsion cosmetic.

[0060] (Evaluation Method 1) Ten female experts in their 20s to 40s who had received training in sensory evaluation and were able to evaluate using a set standard were selected. The experts applied 2 g of each sample to their forearms, and each sample was evaluated and scored on a four-point scale using the absolute evaluation below for non-stickiness during use, penetration, and moisturizing sensation immediately after application. The average score was calculated from the total scores of all panelists for each sample, and the score was evaluated using the four-point scale below.

[0061] (I: Non-sticky) <Absolute evaluation criteria> (Rating): (Evaluation) 4 points: No stickiness 3 points: Not very sticky 2 points: Slightly sticky 1 point: Sticky feeling <4-level evaluation criteria> (Judgment): (Average score) ◎: Over 3.25 points: Very good ○: Over 2.5 points, 3.25 points or less: Good △: Over 1.75 points and 2.5 points or less: Slightly poor × : 1.75 points or less : Defective

[0062] (B: Penetration) <Absolute evaluation criteria> (Rating): (Evaluation) 4 points: I feel like it penetrates into the skin. 3 points: I feel like it penetrates into the skin. 2 points: I don't feel like it penetrates into the skin very much. 1 point: I don't feel like it penetrates into the skin. <4-level evaluation criteria> (Judgment): (Average score) ◎: Over 3.25 points: Very good ○: Over 2.5 points, 3.25 points or less: Good △: Over 1.75 points and 2.5 points or less: Slightly poor × : 1.75 points or less : Defective

[0063] (C: Moisturizing feeling immediately after application) <Absolute evaluation criteria> (Rating): (Evaluation) 4 points: I feel it has a moisturizing effect 3 points: Somewhat feels moisturizing 2 points: I don't feel it has much moisturizing effect 1 point: I don't feel it's moisturizing <4-level evaluation criteria> (Judgment): (Average score) ◎: Over 3.25 points: Very good ○: Over 2.5 points, 3.25 points or less: Good △: Over 1.75 points and 2.5 points or less: Slightly poor × : 1.75 points or less : Defective

[0064] (Evaluation Method 2) Ten women in their 20s to 40s were selected as a panel of experts who had received training in sensory evaluation and were able to evaluate using a set standard. The expert panelists applied 2 g of each sample to their forearms and allowed them to absorb the sample. They then evaluated the duration of moisturizing sensation 5 hours after application using the absolute evaluation method below, rating it on a four-point scale. The average score was calculated from the total scores of all panelists for each sample, and the results were judged using the four-point scale below.

[0065] (2: Long-lasting moisturizing effect) <Absolute evaluation criteria> (Rating): (Evaluation) 4 points: I feel it has a moisturizing effect 3 points: Somewhat feels moisturizing 2 points: I don't feel it has much moisturizing effect 1 point: I don't feel it's moisturizing <4-level evaluation criteria> (Judgment): (Average score) ◎: Over 3.25 points: Very good ○: Over 2.5 points, 3.25 points or less: Good △: Over 1.75 points and 2.5 points or less: Slightly poor × : 1.75 points or less : Defective

[0066] As is clear from the results in Tables 1 to 3, the oil-in-water emulsion cosmetics of Examples 1 to 24 of the present invention were less sticky, had a more penetrating feel, and provided an excellent moisturizing feel immediately after application and a more sustained moisturizing feel, compared to the oil-in-water emulsion cosmetics of Comparative Examples 1 to 9.

[0067] In contrast, Comparative Examples 1 and 2, which did not contain the silicone oil of component (B) or used liquid paraffin, a hydrocarbon oil, were inferior in terms of non-stickiness and sustained moisturizing feeling, and furthermore, the penetration feeling and moisturizing feeling immediately after application were unsatisfactory. Furthermore, Comparative Examples 3 to 6, which did not contain the polyoxyalkylene-added glycerin derivative represented by the specific formula of component (C) or used a polyoxyalkylene-added glycerin derivative not containing a polyoxypropylene skeleton, glycerin, or polypropylene glycol not containing a glycerin skeleton, were unsatisfactory in all respects, including penetration feeling and sustained moisturizing feeling. Furthermore, Comparative Examples 7 to 9, which did not contain the amphiphilic polymer of component (D) or used a water-soluble polymer or water-soluble polysaccharide not having amphiphilicity, were also unsatisfactory in terms of sustained penetration feeling, non-stickiness, penetration feeling, and moisturizing feeling immediately after application.

[0068] Example 25: Cosmetic serum (oil-in-water type) (Component) (mass%) (1) Niacinamide (ingredient (A)) 3 (2) Tranexamic acid (ingredient (A)) 2 (3) (acrylic acid / C10-30 alkyl acrylate) copolymer (Component (D)) Note 6 0.3 (4) Ammonium Acryloyldimethyltaurate / Beheneth-25 Methacrylate Crosspolymer (Component (D)) Note 7 0.05 (5) 1,3-butylene glycol 8 (6) Remaining purified water (7) Glycerin 5 (8) EDTA-2Na 0.01 (9) Sodium hydrogen phosphate 0.3 (10) Sodium dihydrogen phosphate 0.6 (11) PEG / PPG / Polyethylene Glycol / 8 / 5 / 3 Glycerin (Component (C)) Note 2 3 (12) Diglycerin 1 (13) Aureobasidium pullulans culture 5 (14) Purified water 5 (15) Sodium hydroxide 0.07 (16) Dimethicone (10 mPa·s at 25°C) (ingredient (B)) 1.5 (17) Dimethicone (2 mPa·s at 25°C) (ingredient (B)) 1 (18) Triethylhexanoin 1 (19) Liquid paraffin Note 1 0.5 (20) Ethanol 5 (21)Fragrance 0.05 (22) Phenoxyethanol 0.2 (23) Ethylhexylglycerin 0.06 (24) PEG-11 methyl ether dimethicone Note 8 0.5 (25) PEG-9 Dimethicone Note 9 0.1 (26) Vitamin E 0.03 Note 8: KF-6018 (Shin-Etsu Chemical Co., Ltd.) Note 9 KF-6019 (Shin-Etsu Chemical Co., Ltd.)

[0069] (Manufacturing method) A: Mix ingredients (1) to (15) uniformly. B: Components (16) to (26) are mixed and dissolved, then added to A at room temperature and emulsified. C: B was filled into a container to obtain a cosmetic liquid.

[0070] The beauty essence of Example 25 obtained in this manner was excellent in terms of non-stickiness, penetration, moisturizing feeling immediately after application, and long-lasting moisturizing feeling. The mass ratio of the components (A) to (C), (A) / [(B)+(C)], was 0.9.

[0071] Example 26: Emulsion (oil-in-water type) (Component) (mass%) (1) Niacinamide (ingredient (A)) 3 (2) Tranexamic acid (ingredient (A)) 2 (3) (acrylic acid / C10-30 alkyl acrylate) copolymer (Component (D)) Note 6 0.15 (4) Carbomer 0.06 (5) 1,3-butylene glycol 8 (6) Remaining purified water (7) Glycerin 5 (8) EDTA-2Na 0.01 (9) Polyoxypropylene (9) Diglyceryl (Component (C)) Note 4 2 (10) PEG / PPG / Polyethylene Glycol / 8 / 5 / 3 Glycerin (Component (C)) Note 2 3 (11) Polyoxyethylene glycerin (26E.O.) Note 5 1 (12) Polyglyceryl-3 (ingredient (E)) Note 16 0.5 (13) Aureobasidium pullulans culture 5 (14) Purified water 5 (15) Sodium hydroxide 0.08 (16) Dimethicone (6 mPa·s at 25°C) (ingredient (B)) 5 (17) Macadamia nut oil fatty acid phytosteryl Note 10 1 (18) Phytosteryl Oleate Note 11 0.1 (19) Ethanol 3 (20)Fragrance 0.2 (21) Phenoxyethanol 0.2 (22) Ethylhexylglycerin 0.06 (23) PEG-11 methyl ether dimethicone Note 8 0.8 (24) PEG-9 Dimethicone Note 9 0.2 (25) Vitamin E 0.03 Note 10 LANDOOL-MAS (manufactured by Nippon Fine Chemicals) Note 11 Rice sterol ester (Tsuno Rice Fine Chemicals Co., Ltd.)

[0072] (Manufacturing method) A: Mix ingredients (1) to (15) uniformly. B: Components (16) to (25) are heated to approximately 70°C, mixed and dissolved uniformly, then added to A, emulsified, and cooled. C: B was filled into a container to obtain an emulsion.

[0073] The emulsion (oil-in-water type) of Example 26 obtained as described above was excellent in terms of non-stickiness, penetration, moisturizing feeling immediately after application, and long-lasting moisturizing feeling. The mass ratio of the components (A) to (C), (A) / [(B)+(C)], was 0.5.

[0074] Example 27: Sunscreen (oil-in-water type) (Component) (mass%) (1) 1,3-butylene glycol 5 (2) Dipropylene glycol 5 (3) Behentrimonium chloride 0.1 (4) Hydrogenated lecithin Note 12 0.5 (5) Cholesterol Note 13 0.6 (6) Phytosterol 0.1 (7) PEG / PPG / Polyethylene Glycol / 8 / 5 / 3 Glycerin (Component (C)) Note 2 1 (8) Remaining purified water (9) Niacinamide (ingredient (A)) 3 (10) Tranexamic acid (ingredient (A)) 2 (11) (acrylic acid / C10-30 alkyl acrylate) copolymer (Component (D)) Note 6 0.4 (12) Triethanolamine 0.4 (13) Dimethicone diethyl benzalmalonate 1.2 (14) 4-tert-butyl-4´-methoxy-dibenzoylmethane 2 (15) 2-Ethylhexyl para-methoxycinnamate 7 (16) Diethylaminohydroxybenzoylhexyl benzoate 2.5 (17) Dimethicone (100 mPa·s at 25°C) (ingredient (B)) 1 (18) Hydrogenated castor oil stearate Note 14 0.5 (19) Propylene glycol dicaprate 5 (20) Ethyl oleate 0.3 (21) Natural Vitamin E 0.1 (22) Rosemary oil 0.01 (23) 1,2-pentanediol 0.1 (24) Zinc oxide 2 (25) Water-soluble collagen 0.01 (26) Chamomile flower extract 0.05 (27) Calendula Flower Extract 0.05 (28) Glycerin 1 (29) Ethanol 7 (30)Fragrance 0.1 Note 12: Nikkor Resinol S-10 (manufactured by Nikko Chemicals) Note 13 Kairei Marine Cholesterol (manufactured by Nippon Suisan Co., Ltd.) Note 14 Cast Ride MS (manufactured by National Mimatsu)

[0075] (Manufacturing method) A: Components (1) to (7) are uniformly dissolved and mixed at 75°C. B: Components (8) to (12) are uniformly dissolved and mixed at 70°C. C: Components (13) to (22) are uniformly dissolved and mixed at 80°C. D: Add B and C to A and emulsify at 70°C. E: Components (23) to (30) were added to D and mixed, and then cooled to 40°C to obtain a sunscreen (oil-in-water type).

[0076] The sunscreen (oil-in-water type) of Example 27 obtained as described above was excellent in terms of non-stickiness, penetration, moisturizing feeling immediately after application, and long-lasting moisturizing feeling. The mass ratio of the components (A) to (C), (A) / [(B)+(C)], was 2.5.

[0077] Example 28: Lotion (oil-in-water type) (Component) (mass%) (1) PEG-20 hydrogenated castor oil 0.5 (2) Tri(palmate / palm kernelate / oliveate / macadamiate / rapeseed acid)glyceryl tri(palmate / palm kernelate / olive acid / macadamiate / rapeseed acid) Note 15 0.07 (3) Phytosteryl Oleate 0.01 (4) Dimethicone (6 mPa·s at 25°C) (ingredient (B)) 0.13 (5) Vitamin E 0.01 (6) Niacinamide (ingredient (A)) 3 (7) Tranexamic acid (ingredient (A)) 2 (8) Ammonium Acryloyldimethyltaurate / Beheneth-25 Methacrylate Crosspolymer Note 7 (Component (D)) 0.05 (9) 1,3-butylene glycol 8 (10) Glycerin 5 (11) EDTA-2Na 0.01 (12) Sodium hydrogen phosphate 0.1 (13) Sodium dihydrogen phosphate 0.2 (14) PEG / PPG / Polyethylene Glycol / 8 / 5 / 3 Glycerin (Component (C)) Note 2 1 (15) Diglycerin 0.5 (16) Methylgluceth-10 0.5 (17) Aureobasidium pullulans culture 1 (18) Sodium hydroxide 0.02 (19) Ethanol 2 (20) PEG-50 hydrogenated castor oil isostearate 0.1 (21)Fragrance 0.02 (22) Phenoxyethanol 0.2 (23) Ethylhexylglycerin 0.06 (24) Remaining purified water Note 15 HS Oil G-AP (National Mimatsu Co., Ltd.)

[0078] (Manufacturing method) A: Components (1) to (5) are uniformly dissolved and mixed at 75°C. B: While maintaining A at 75°C, add a portion of component (24) and emulsify at 70°C. C: After B is cooled to room temperature, it is subjected to high pressure treatment (treatment pressure 200) in a microfluidizer. D: Components (6) to (23) and the remainder of component (24) are uniformly dissolved and mixed at room temperature. E: A lotion was obtained by adding C to D and mixing.

[0079] The lotion (oil-in-water type) of Example 28 obtained as described above was excellent in terms of non-stickiness, penetration, moisturizing feeling immediately after application, and long-lasting moisturizing feeling. The mass ratio of the components (A) to (C), (A) / [(B)+(C)], was 4.4.

Claims

1. The following components (A) to (D): (A) Niacinamide and tranexamic acid, or at least one of them, in an amount of 1 to 10% by mass (B) Silicone oil 1% by mass or more (C) 2% to 20% by mass of one or more glycerin derivatives selected from component (c1) and component (c2) represented by the following general formulas. Component (c1) General formula (1) 【Chemistry 1】 (In formula (1), Gly is the residue obtained by removing the hydroxyl group from glycerol, PO is an oxypropylene group, EO is an oxyethylene group, l and m are the average number of moles of PO and EO added, respectively, (l + m) is a value from 1 to 60, the mass ratio (PO / EO) is from 1 / 5 to 5 / 1, BO is an oxyalkylene group having 4 carbon atoms, and n is the average number of moles of BO added, a value from 0 to 5.) Component (c2) General formula (2) 【Chemistry 2】 (In equation (2), R is -[CH ２ CH (CH ３ )O]- represents the integers p, q, r, and s, respectively, and p + q + r + s represents the integers from 4 to 20. (D) Amphiphilic polymer 0.02% by mass or more and 0.4% by mass or less It contains, The component (D) is at least one selected from acrylic acid / alkyl methacrylate copolymer, ammonium acryloyldimethyltaurate / vinylpyrrolidone copolymer, ammonium acryloyldimethyltaurate beheneth-25 methacrylate copolymer, hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer, sodium acrylate / sodium acryloyldimethyltaurate copolymer, PEG-240 / decyltetradeceth-20 / hexamethyldiisocyanate copolymer, hydrophobized hydroxypropylcellulose, and hydroxypropyl starch phosphate. Oil-in-water emulsion cosmetic.

2. The following components (A) to (D): (A) Niacinamide and tranexamic acid, or at least one of them, in an amount of 1 to 10% by mass (B) Silicone oil (C) Component (c1) which is a glycerol derivative represented by the following general formula (1): 1 to 20% by mass Component (c1) General formula (1) 【Transformation 3】 (In formula (1), Gly is the residue obtained by removing the hydroxyl group from glycerol, PO is an oxypropylene group, EO is an oxyethylene group, l and m are the average number of moles of PO and EO added, respectively, (l + m) is a value from 1 to 60, the mass ratio (PO / EO) is from 1 / 5 to 5 / 1, BO is an oxyalkylene group having 4 carbon atoms, and n is the average number of moles of BO added, a value from 0 to 5.) (D) Amphiphilic polymer 0.01 to 0.4% by mass It contains, The component (D) is at least one selected from acrylic acid / alkyl methacrylate copolymer, ammonium acryloyldimethyltaurate / vinylpyrrolidone copolymer, ammonium acryloyldimethyltaurate beheneth-25 methacrylate copolymer, hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer, sodium acrylate / sodium acryloyldimethyltaurate copolymer, PEG-240 / decyltetradeceth-20 / hexamethyldiisocyanate copolymer, hydrophobized hydroxypropylcellulose, and hydroxypropyl starch phosphate. Oil-in-water emulsion cosmetic.

3. The oil-in-water emulsion cosmetic according to claim 1 or 2, wherein the content of component (B) is 60% by mass or more relative to the total amount of oil contained in the oil-in-water emulsion cosmetic.

4. The oil-in-water emulsion cosmetic composition according to any one of claims 1 to 3, wherein niacinamide and tranexamic acid are used in combination as component (A).

5. The oil-in-water emulsion cosmetic composition according to any one of Claims 1 to 4, wherein the mass ratio of the components (A) to (C) (A) / [(B) + (C)] is 0.05 or more and less than 7.

6. The oil-in-water emulsion cosmetic composition according to any one of claims 1 to 5, wherein the mass ratio of components (A) to (D) [(B) + (C) + (D)] / (A) is 0.1 or more and 20 or less.

7. The oil-in-water emulsion cosmetic composition according to any one of claims 1 to 6, further comprising component (E) polyglycerin.

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