Water-in-oil emulsion sunscreen cosmetic

Abstract

To provide a water-in-oil emulsion sunscreen cosmetic that allows a medicinal agent to be blended into the internal phase, while having high ultraviolet protection power.SOLUTION: A sunscreen cosmetic of the present invention is characterized by comprising: (A) an ultraviolet absorbing agent; (B) a medicinal agent selected from the group consisting of L-ascorbic acid and derivatives thereof, tranexamic acid and derivatives thereof, alkoxysalicylic acid and derivatives thereof, glycyrrhizinic acid and derivatives thereof, and nicotinic acid and derivatives thereof; (C) a water-soluble thickener that is not sugar-derived; and (D) water.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a water-in-oil emulsion sunscreen cosmetic that has high UV protection power and can incorporate a drug into the internal phase. [Background technology]

[0002] Ultraviolet rays are one of the factors that cause skin damage, and it is known that strong UV rays cause excessive production of melanin pigment, which leads to age spots and freckles. Therefore, protecting skin from the harmful effects of UV rays and restoring skin damaged by UV rays are important issues in skin care and body care.

[0003] Cosmetics designed to protect the skin from the harmful effects of ultraviolet rays include sunscreen cosmetics that absorb or scatter UVA and UVB rays to reduce the amount of UV rays that reach the skin. Water-in-oil emulsion cosmetics are preferred for sunscreen cosmetics because they can stably incorporate UV absorbers and UV scatterers to achieve high UV protection and also provide sufficient water resistance. However, because the outer layer of a water-in-oil emulsion is an oil phase, it is necessary to reduce oiliness and stickiness.

[0004] For example, Patent Document 1 describes that by combining and blending a silicone skeleton powder, a polymethyl methacrylate powder, and a hydrophobic treated plate-like powder in a water-in-oil emulsion sunscreen cosmetic, a cosmetic that exhibits a high UV protection effect and is not oily or sticky can be obtained.

[0005] On the other hand, skin care cosmetics containing agents such as whitening agents and anti-inflammatory agents are popular as cosmetics for recovering skin from damage caused by ultraviolet rays. To date, no studies have been conducted on water-in-oil emulsion cosmetics to ensure both the efficacy of pharmaceuticals and the enhanced UV protection ability. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-63954 Summary of the Invention [Problem to be solved by the invention]

[0007] An object of the present invention is to provide a water-in-oil emulsion sunscreen cosmetic that has sufficient ultraviolet protection power while also exhibiting medicinal effects. [Means for solving the problem]

[0008] As a result of extensive research to solve the above-mentioned problems, the inventors discovered that when a certain type of water-soluble thickener is combined with a specific pharmaceutical component, the UV protection ability of an ultraviolet absorber is improved, and thus the present invention was completed.

[0009] That is, the present invention is (A) ultraviolet absorber, (B) a drug selected from the group consisting of L-ascorbic acid and derivatives thereof, tranexamic acid and derivatives thereof, alkoxysalicylic acid and derivatives thereof, glycyrrhizic acid and derivatives thereof, and nicotinic acid and derivatives thereof; (C) a water-soluble thickener other than a sugar-derived thickener, and (D)Water The present invention provides a water-in-oil emulsion sunscreen cosmetic comprising: [Effects of the Invention]

[0010] By adopting the above-described configuration, the cosmetic of the present invention can improve the UV protection power of the UV absorber incorporated into the sunscreen cosmetic. Furthermore, by combining a water-in-oil emulsion with a specific water-soluble thickener, it is possible to realize a sunscreen cosmetic that has water resistance while also providing the fresh feel of an oil-in-water emulsion. DETAILED DESCRIPTION OF THE INVENTION

[0011] The sunscreen cosmetic of the present invention is characterized by comprising (A) an ultraviolet absorber, (B) a drug selected from the group consisting of L-ascorbic acid and its derivatives, tranexamic acid and its derivatives, alkoxysalicylic acid and its derivatives, glycyrrhizic acid and its derivatives, and nicotinic acid and its derivatives, (C) a water-soluble thickener not derived from sugar, and (D) water. Each of the components constituting the cosmetic of the present invention will be described in detail below.

[0012] <(A) UV absorber> The ultraviolet absorber (A) (hereinafter sometimes simply referred to as "component (A)") incorporated into the sunscreen cosmetic of the present invention can be any of those typically incorporated into sunscreen cosmetics. Examples include benzoic acid derivatives, salicylic acid derivatives, cinnamic acid derivatives, dibenzoylmethane derivatives, β,β-diphenylacrylate derivatives, benzophenone derivatives, benzylidene camphor derivatives, phenylbenzimidazole derivatives, triazine derivatives, phenylbenzotriazole derivatives, anthranil derivatives, imidazoline derivatives, benzalmalonate derivatives, and 4,4-diarylbutadiene derivatives. Specific examples and trade names are listed below, but the invention is not limited to these.

[0013] Examples of benzoic acid derivatives include ethyl para-aminobenzoate (PABA), ethyl-dihydroxypropyl PABA, ethylhexyl-dimethyl PABA (e.g., Escarol 507; ISP), glyceryl PABA, PEG-25-PABA (e.g., Uvinal P25; BASF), and diethylaminohydroxybenzoylhexyl benzoate (e.g., Uvinal A Plus).

[0014] Examples of salicylic acid derivatives include homosalate (Eusolex HMS; Rona / EM Industries), ethylhexyl salicylate or octyl salicylate (e.g., NeoHeliopan OS; Herman & Reimer), dipropylene glycol salicylate (e.g., Dipsal; Skell), and TEA salicylate (e.g., NeoHeliopan TS; Herman & Reimer).

[0015] Examples of cinnamic acid derivatives include octyl methoxycinnamate or ethylhexyl methoxycinnamate (e.g., Parsol MCX; Hoffmann-La Roche), isopropyl methoxycinnamate, isoamyl methoxycinnamate (e.g., Neo Heliopan E1000; Herman & Reimer), cinnoxate, DEA methoxycinnamate, diisopropyl methylcinnamate, glyceryl ethylhexanoate dimethoxycinnamate, and di-(2-ethylhexyl)-4'-methoxybenzalmalonate.

[0016] Examples of dibenzoylmethane derivatives include 4-tert-butyl-4'-methoxydibenzoylmethane (for example, Parsol 1789).

[0017] Examples of β,β-diphenylacrylate derivatives include octocrylene (for example, "Uvinal N539T"; BASF).

[0018] Examples of benzophenone derivatives include benzophenone-1 (e.g., "Uvinal 400"; BASF), benzophenone-2 (e.g., "Uvinal D50"; BASF), benzophenone-3 or oxybenzone (e.g., "Uvinal M40"; BASF), benzophenone-4 (e.g., "Uvinal MS40"; BASF), benzophenone-5, benzophenone-6 (e.g., "Helisorb 11"; Norquay), benzophenone-8 (e.g., "Spectra-Sorb UV-24"; American Cyanamid), benzophenone-9 (e.g., "Uvinal DS-49"; BASF), and benzophenone-12.

[0019] Examples of benzylidene camphor derivatives include 3-benzylidene camphor (e.g., "Mexoryl SD"; Cimex), 4-methylbenzylidene camphor, benzylidene camphorsulfonic acid (e.g., "Mexoryl SL"; Cimex), benzalkonium camphor methosulfate (e.g., "Mexoryl SO"; Cimex), terephthalidene discamphorsulfonic acid (e.g., "Mexoryl SX"; Cimex), and polyacrylamidomethyl benzylidene camphor (e.g., "Mexoryl SW"; Cimex).

[0020] Examples of phenylbenzimidazole derivatives include phenylbenzimidazole sulfonic acid (e.g., Orthorex 232; Merck) and disodium phenyldibenzimidazole tetrasulfonate (e.g., Neo-Heliopan AP; Herman & Reimer).

[0021] Examples of triazine derivatives include bisethylhexyloxyphenol methoxyphenyl triazine (e.g., "Tinosorb S"; Ciba Specialty Chemicals), ethylhexyl triazone (e.g., "Uvinal T150"; BASF), diethylhexylbutamido triazone (e.g., "Uvasorb HEB"; Sigma-3V), 2,4,6-tris(diisobutyl-4'-aminobenzalmalonate)-s-triazine, and 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine.

[0022] Examples of phenylbenzotriazole derivatives include drometrizole trisiloxane (e.g., "Silatrizole"; Rhodia-Chemie), methylenebis(benzotriazolyltetramethylbutylphenol) (e.g., "Tinosorb M"; Ciba Specialty Chemicals).

[0023] Examples of anthranil derivatives include menthyl anthranilate (for example, "Neo Heliopan MA"; Herman & Reimer).

[0024] Examples of imidazoline derivatives include ethylhexyldimethoxybenzylidene dioxoimidazoline propionate.

[0025] Examples of benzalmalonate derivatives include polyorganosiloxanes having benzalmalonate functional groups (for example, polysilicone-15; "Parsol SLX"; DSM Nutrition Japan).

[0026] Examples of 4,4-diarylbutadiene derivatives include 1,1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene.

[0027] The ultraviolet absorbent (A) used in the present invention may be blended alone or in combination of two or more kinds. The blending amount of (A) ultraviolet absorber is 3 to 40% by mass, preferably 3 to 30% by mass, and more preferably 3 to 20% by mass, based on the total amount of the sunscreen cosmetic. If the blending amount of (A) ultraviolet absorber is less than 3% by mass, it is difficult to obtain a sufficient ultraviolet protection effect, and even if it is blended in more than 40% by mass, it is not possible to expect an increase in ultraviolet protection effect commensurate with the blending amount, and it is not preferable in that it actually deteriorates stability and usability.

[0028] <(B) Drugs> The (B) agent (hereinafter sometimes simply referred to as "component (B)") incorporated into the sunscreen cosmetic of the present invention is an agent typically incorporated into cosmetics as a whitening agent, anti-inflammatory agent, anti-wrinkle agent, etc., and is selected from L-ascorbic acid and its derivatives, tranexamic acid and its derivatives, alkoxysalicylic acid and its derivatives, glycyrrhizic acid and its derivatives, and nicotinic acid and its derivatives. Each component is described in detail below.

[0029] Examples of L-ascorbic acid derivatives include L-ascorbic acid monoalkyl esters such as L-ascorbic acid monostearate, L-ascorbic acid monopalmitate, and L-ascorbic acid monooleate; L-ascorbic acid monoesters such as L-ascorbic acid monophosphate and L-ascorbic acid-2-sulfate; L-ascorbic acid dialkyl esters such as L-ascorbic acid distearate, L-ascorbic acid dipalmitate, and L-ascorbic acid dioleate; L-ascorbic acid trialkyl esters such as L-ascorbic acid tristearate, L-ascorbic acid tripalmitate, and L-ascorbic acid trioleate; L-ascorbic acid triesters such as L-ascorbic acid triphosphate; and L-ascorbic acid glucosides such as L-ascorbic acid 2-glucoside. In the present invention, L-ascorbic acid, L-ascorbic acid phosphate, L-ascorbic acid 2-sulfate, L-ascorbic acid 2-glucoside, and salts thereof are preferably used.

[0030] Examples of tranexamic acid derivatives include tranexamic acid dimers (e.g., trans-4-(trans-aminomethylcyclohexanecarbonyl)aminomethylcyclohexanecarboxylic acid hydrochloride), esters of tranexamic acid and hydroquinone (e.g., 4-(trans-aminomethylcyclohexanecarboxylic acid 4'-hydroxyphenyl ester), esters of tranexamic acid and gentisic acid (e.g., 2-(trans-4-aminomethylcyclohexylcarbonyloxy)-5-hydroxybenzoic acid), and amides of tranexamic acid (e.g., trans-4-aminomethylcyclohexanecarboxylic acid methylamide, trans-4-(p-methoxybenzoyl)aminomethylcyclohexanecarboxylic acid, trans-4-guanidinomethylcyclohexanecarboxylic acid). In the present invention, tranexamic acid and its salts are preferably used.

[0031] Alkoxysalicylic acids are compounds in which the hydrogen atom at the 3rd, 4th, or 5th position of salicylic acid is substituted with an alkoxy group. The alkoxy group is preferably a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, a butoxy group, or an isobutoxy group, and more preferably a methoxy group or an ethoxy group. Specific examples of such compounds include 3-methoxysalicylic acid, 3-ethoxysalicylic acid, 4-methoxysalicylic acid, 4-ethoxysalicylic acid, 4-propoxysalicylic acid, 4-isopropoxysalicylic acid, 4-butoxysalicylic acid, 5-methoxysalicylic acid, 5-ethoxysalicylic acid, and 5-propoxysalicylic acid. In the present invention, methoxysalicylic acid and its salt (potassium methoxysalicylic acid) are preferably used.

[0032] Derivatives of glycyrrhizinic acid include salts of glycyrrhizinic acid, esters of glycyrrhizinic acid with higher alcohols, etc. In the present invention, glycyrrhizinic acid and its salts (dipotassium glycyrrhizinate, monoammonium glycyrrhizinate, etc.) are preferably used.

[0033] The salts of the above-mentioned drugs are not particularly limited, but examples thereof include alkali metal salts or alkaline earth metal salts such as sodium salts, potassium salts, and calcium salts, as well as ammonium salts and amino acid salts.

[0034] Nicotinic acid and its derivatives include nicotinic acid, benzyl nicotinate, nicotinamide, dl-α-tocopherol nicotinate, etc. Nicotinamide is preferably used in the present invention.

[0035] The cosmetic of the present invention may contain one or more of the above-mentioned agents in combination.

[0036] It was also confirmed that the use of a non-salt agent tends to further improve the rate of improvement in UV protection power. Therefore, in the present invention, it is more preferable to use the above-mentioned non-salt agent.

[0037] The blending amount of the (B) drug is 0.05 to 3 mass % of the total amount of the sunscreen cosmetic, preferably 0.1 to 3 mass %, and more preferably 0.5 to 2 mass %. If the blending amount of the (B) drug is less than 0.05 mass %, it is difficult to obtain sufficient efficacy, and if it is more than 3 mass %, it is not preferable because stability and usability are deteriorated.

[0038] <(C) Water-soluble thickener> The water-soluble thickener (C) (hereinafter sometimes referred to simply as "component (C)") blended into the sunscreen cosmetic of the present invention is a water-soluble thickener typically blended into cosmetics, and is selected from water-soluble thickeners excluding sugar-derived water-soluble thickeners. Specific examples include, but are not limited to, vinyl polymers, acrylic polymers, acrylate synthetic polymers, and hydrophobically modified polyether urethanes.

[0039] Examples of vinyl polymers include polyvinyl alcohol, polyvinyl acetate, polyvinyl methyl ether, polyvinyl pyrrolidone, copolymers of vinyl pyrrolidone and vinyl acetate, and carboxyvinyl polymers.

[0040] Examples of acrylic polymers include sodium polyacrylate, polyethyl acrylate, poly(alkanolamine acrylate), copolymers of alkyl methacrylate and dimethylaminoethyl methacrylate, poly(2-acrylamido-2-methylpropanesulfonic acid), polymethacryloyloxytrimethylammonium, (ammonium acryloyldimethyltaurate / VP) copolymer, and (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer ("SU-GEL", Toho Chemical Co., Ltd.).

[0041] Examples of acrylate-based synthetic polymers that can be used include acrylate / steareth-20 methacrylate copolymer (Accurin (registered trademark) 22, Dow Chemical Company), and acrylate / C10-30 alkyl acrylate crosspolymer (Pemulen (registered trademark) TR-2, Nikko Chemicals Co., Ltd.).

[0042] The hydrophobically modified polyether urethane refers to an associative thickener represented by the following general formula (1). R 1 -{(OR 2 ) k -OCONH-R 3 [-NHCOO-(R 4 -O) n -R 5 ] h} m Formula (1) [In the formula, R 1 , R 2 and R 4 represent hydrocarbon groups which may be the same or different, and R 3 represents a hydrocarbon group which may have a urethane bond, and R 5 represents a linear or branched divalent hydrocarbon group, m is an integer of 2 or greater, h is an integer of 1 or greater, and k and n are each independently an integer ranging from 0 to 1000.

[0043] A specific example of the hydrophobically modified polyether urethane is polyethylene glycol-decyltetradeceth-hexamethylene diisocyanate copolymer. A particularly preferred example is (PEG-240 / decyltetradeceth-20 / hexamethyldiisocyanate) copolymer ("ADEKA NOL GT-700", Adeka Corporation).

[0044] The water-soluble thickener (C) used in the present invention may be used alone or in combination of two or more kinds. The blending amount of (C) water-soluble thickener is 0.01 to 2% by mass, preferably 0.02 to 1% by mass, 0.03 to 1% by mass, 0.05 to 1% by mass, and more preferably 0.03 to 0.3% by mass, 0.1 to 0.3% by mass, based on the total amount of the sunscreen cosmetic. If the blending amount is less than 0.01% by mass, the thickening is insufficient, and the stability of the internal phase deteriorates. If the blending amount exceeds 2% by mass, the cosmetic tends to be sticky during use.

[0045] <(D)Water> The water (D) (hereinafter sometimes simply referred to as "component (D)") blended in the sunscreen cosmetic of the present invention is not particularly limited, but examples thereof include ion-exchanged water, purified water, and natural water. The blending amount of (D) water is 13 to 80% by mass, and preferably 15 to 70% by mass, based on the total amount of the sunscreen cosmetic.

[0046] In the past, it was difficult to incorporate a water-soluble whitening agent into the internal phase (aqueous phase) of a water-in-oil emulsion. In the water-in-oil emulsion cosmetic of the present invention, the aqueous phase is thickened with a specific water-soluble thickener, allowing the aqueous phase and oil phase to be blended in a ratio of 1:7 to 8:1, making it possible to stably incorporate the whitening agent.

[0047] <Optional ingredients> In addition to the above components (A) to (D), the sunscreen cosmetic of the present invention may contain other components that are commonly used in cosmetics, provided that the effects of the present invention are not impaired. For example, oily components, aqueous components, alcohols, moisturizers, thickeners, surfactants, film-forming agents, powder components, UV scattering agents, stabilizers, chelating agents, preservatives, fragrances, etc. may be appropriately blended as needed.

[0048] The sunscreen cosmetic of the present invention does not contain a volatile cyclic silicone such as cyclopentasiloxane, which is typically incorporated into water-in-oil emulsion cosmetics to improve the feel upon use, but it is possible to obtain a sunscreen cosmetic that is not sticky, has a good feel upon use, and has improved UV protection. Thus, the cosmetic of the present invention includes an embodiment in which no cyclic silicone is incorporated.

[0049] The sunscreen cosmetic of the present invention can be prepared in the form of emulsion, cream, lotion, spray, etc., and can be produced by a conventional method suitable for each formulation. [Example]

[0050] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Unless otherwise specified, the blending amount is expressed in mass % relative to the system in which the component is blended. Before describing each example in detail, the evaluation methods used will be described.

[0051] 1. Usability Each sample of the Examples and Comparative Examples was actually used by a panel of 10 experts, who evaluated its usability (non-stickiness, freshness). Each panelist gave a sensory evaluation on a 5-point scale according to the following evaluation criteria, and the total score was used to make a judgment based on the following evaluation criteria. "Evaluation criteria" 5: Excellent 4: Excellent 3: Normal 2: Inferior 1: Very poor "Evaluation Criteria" A: Total score is 40 or more B: Total score is 30-39 points C: Total score is 29 points or less

[0052] 2. Measurement of improvement rate of UV protection power Each cosmetic sample was applied at 2 mg / cm to a measurement plate (S plate) (5 x 5 cm V-groove PMMA plate, SPFMASTER-PA01). 2 The absorbance of the formed coating was measured using a Hitachi U-3500 model recording spectrophotometer. An uncoated plate was used as a control, and the absorbance (Abs) was calculated using the following formula. The measured values ​​from 280 nm to 400 nm were integrated to determine the integrated absorbance value. Abs=-log(T / To) T: transmittance of sample, To: transmittance of uncoated sample

[0053] From the integrated absorbance values ​​of the samples thus obtained, the improvement rate of the UV protection power was calculated using the following formula, relative to a sample (reference sample) containing no aqueous phase thickener or chemical. [Improvement rate of UV protection (%)] = [integrated absorbance value of sample] / [integrated absorbance value of reference sample] x 100

[0054] <Examples 1 to 10, Comparative Examples 1 to 6, and Reference Sample> Water-in-oil emulsion cosmetics were prepared having the compositions shown in the following Tables 1 and 2. The usability and improvement rate of UV protection power were evaluated according to the evaluation methods described above.

[0055] [Table 1]

[0056] As shown in Table 1, compared to a reference sample that did not contain either the thickener of the present invention or a drug, the cosmetic of Comparative Example 5, which contained only the drug of the present invention (tranexamic acid), showed improved UV protection. The cosmetic of Examples 1 to 6, which contained various thickeners of the present invention in addition to the drug of the present invention, showed even greater improvement in UV protection. Although the cosmetic of Example 5, which contained a (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer as a thickener, was slightly inferior in usability, the cosmetic of Examples 1 to 4 and 6 also had an excellent feel when used.

[0057] On the other hand, the cosmetics of Comparative Examples 1 to 4, which contained a sugar-derived water-soluble thickener, not only did not show any improvement in UV protection power, but also had an inferior feel when used.

[0058] [Table 2]

[0059] As shown in Table 2, the cosmetics of Examples 7 to 10, which contained a combination of the thickener of the present invention and various agents, demonstrated a synergistic improvement in UV protection power compared to the reference sample, which contained neither the agent of the present invention nor the thickener, and the cosmetic of Comparative Example 6, which contained only the thickener of the present invention (sodium polyacrylate). Furthermore, this synergistic improvement was particularly pronounced when an agent other than a salt was incorporated (Examples 7 and 10). Furthermore, the cosmetics of Examples 7 to 10 were not sticky and had an excellent feel when used.

[0060] The formulations of the cosmetic of the present invention are exemplified below. It goes without saying that the present invention is not limited to these formulation examples and is defined by the claims. All blend amounts are expressed in mass % relative to the total amount of the cosmetic.

[0061] Formulation example 1: Water-in-oil emulsion sunscreen cosmetic (Ingredient name) Compounding amount (mass%) water residue Sodium polyacrylate 0.1 2-Amino-2-methyl-1,3-propanediol 1 Tranexamic acid 2 EDTA 3Na-2H2O 0.2 Ethanol 5 1,3-butylene glycol 2 Glycerin 3 Phenoxyethanol 0.5 Isododecane 20 Diisopropyl Sebacate 6 Isostearic acid 0.1 Sorbitan sesquiisostearate 1 PEG-9 Polydimethylpolysiloxyethyl Dimethicone 4 Dimethyl distearyl ammonium hectorite 0.2 Fatty acid treated zinc oxide 14 3 cornstarch Ethylhexyl methoxycinnamate 7 Phenylbenzimidazole sulfonic acid 1 Bis-ethylhexyloxyphenol methoxyphenyl triazine 0.5 Diethylaminohydroxybenzoylhexyl benzoate 1.5

[0062] Formulation example 2: Water-in-oil emulsion sunscreen cosmetic (Ingredient name) Compounding amount (mass%) water residue Sodium polyacrylate 0.1 2-Amino-2-methyl-1,3-propanediol 1 Tranexamic acid 2 EDTA 3Na-2H2O 0.2 Ethanol 5 1,3-butylene glycol 2 Glycerin 3 Phenoxyethanol 0.5 Isododecane 20 Diisopropyl Sebacate 6 Isostearic acid 0.1 Sorbitan sesquiisostearate 1 PEG-9 Polydimethylpolysiloxyethyl Dimethicone 4 Dimethyl distearyl ammonium hectorite 0.2 Fatty acid treated zinc oxide 14 Silica 3 Ethylhexyl methoxycinnamate 7 Phenylbenzimidazole sulfonic acid 1 Bis-ethylhexyloxyphenol methoxyphenyl triazine 0.5 Diethylaminohydroxybenzoylhexyl benzoate 1.5

[0063] [Section 1] (A) ultraviolet absorber, (B) a drug selected from the group consisting of L-ascorbic acid and its derivatives, tranexamic acid and its derivatives, alkoxysalicylic acid and its derivatives, glycyrrhizic acid and its derivatives, and nicotinic acid and its derivatives (C) a water-soluble thickener other than a sugar-derived thickener, and (D)Water A water-in-oil emulsion sunscreen cosmetic comprising: [Section 2] Item 2. The cosmetic preparation according to Item 1, wherein the component (C) is one or more selected from the group consisting of vinyl polymers, acrylic polymers, acrylate synthetic polymers, and hydrophobically modified polyether urethanes. [Section 3] Item 3. The cosmetic according to item 1 or 2, wherein the blending amount of the component (D) is 13 to 80% by mass based on the total amount of the cosmetic. [Section 4] Item 4. The cosmetic preparation according to any one of Items 1 to 3, wherein the agent is not a salt.

Claims

1. (A) an ultraviolet absorber, (B) a drug selected from the group consisting of tranexamic acid and its derivatives, alkoxysalicylic acid and its derivatives, glycyrrhizic acid and its derivatives, and nicotinic acid and its derivatives. (C) a water-soluble thickener other than a sugar-derived thickener, and (D) Water and A water-in-oil emulsion sunscreen cosmetic in which the component (B) is blended in the water phase.

2. 2. The cosmetic according to claim 1, wherein the component (C) is one or more selected from the group consisting of vinyl polymers, acrylic polymers, acrylate synthetic polymers, and hydrophobically modified polyether urethanes.

3. 3. The cosmetic according to claim 1, wherein the blending amount of the component (D) is 13 to 80% by mass based on the total amount of the cosmetic.

4. The cosmetic preparation according to claim 1 , wherein the agent is not a salt.

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