Oil-in-water emulsion cosmetic

Abstract

The present invention addresses the problem of providing an oil-in-water type emulsion cosmetic which has an excellent moisturizing feeling, an excellent use feeling, and a good subsequent make-up effect. As a solution, provided is an oil-in-water type emulsion cosmetic characterized by containing (A)-(C): (A) 0.1-5% by mass of tranexamic acid; (B) a 2-methacryloyloxyethyl phosphorylcholine stearyl methacrylate copolymer; and (C) a diester of a dicarboxylic acid.

Description

Technical Field

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

[0002] In recent years, the functions required of skin care cosmetics have become increasingly diverse, and in addition to moisturizing effects, whitening effects and other functions are also required. As whitening active ingredients, vitamin C, vitamin E, kojic acid, arbutin, tranexamic acid, etc. are known. Among them, tranexamic acid is an ingredient with an "anti-plasmin effect" that inhibits "plasmin", an enzyme in the body that causes inflammation, and has attracted attention as a whitening active ingredient in recent years.

[0003] In order to impart the whitening effect brought by tranexamic acid, it is required to prepare 0.5-2 mass % of tranexamic acid relative to the whole cosmetics. However, it is known that the use feeling of cosmetics with high tranexamic acid content will decrease. Experience shows that when 0.5-2 mass % is contained relative to the whole cosmetics, the use feeling will decrease. In particular, the use feeling of oil-in-water type emulsified cosmetics decreases significantly, so there is often a problem of decreased ductility or skin permeability, which are important design qualities of cosmetics.

[0004] Currently, a technology for improving the feeling of use in cosmetics with high tranexamic acid content has been proposed. For example, in Patent Document 1, the applicant of this case proposed an emulsified cosmetic characterized by containing: (A) 0.5-2% by mass of tranexamic acid and / or 3-10% by mass of niacinamide, (B) one or more oils selected from silicone oil with a dynamic viscosity of 50 cSt or less and caprylic / capric triglyceride, (C) 1.5-6.5% by mass of anhydrous silicic acid, (D) ethanol, (E) polyols, and (F) water. When applied to the skin, the emulsified cosmetic has a moist feeling, good ductility and skin permeability, and does not make the skin sticky after application, with excellent refreshing feeling.

[0005] Generally, oil-in-water emulsified cosmetics such as lotion or cream are applied at the end of skin care, followed by makeup. However, it has been found that if oil-in-water emulsified cosmetics with a high tranexamic acid content are applied during skin care, the makeup effect of foundation etc. will be deteriorated during the subsequent makeup.

[0006] Patent Literature Patent Document 1: Japanese Patent Application Publication No. 2023-025315 Summary of the invention An object of the present invention is to provide an oil-in-water emulsified cosmetic having excellent moisturizing feeling and feeling during use and good subsequent makeup effect.

[0007] Means for solving the problems of the present invention are as follows.

[0008] 1. An oil-in-water emulsified cosmetic, characterized by comprising (A) to (C): (A) 0.1-5% by mass of tranexamic acid; (B) 2-methacryloyloxyethyl phosphorylcholine / octadecyl methacrylate copolymer; (C) Diesters of dicarboxylic acids.

[0009] 2. The oil-in-water emulsified cosmetic according to 1., wherein the component (C) is a diester of a dicarboxylic acid having 4 to 8 carbon atoms and a monohydric alcohol having 4 to 18 carbon atoms.

[0010] 3. The oil-in-water emulsified cosmetic according to 1. or 2., characterized in that component (C) is one or more selected from diisostearyl malate, diethylhexyl succinate, diethoxyethyl succinate, bis-diethoxydiglycol cyclohexane 1,4-dicarboxylate, and bisethoxydiglycol succinate.

[0011] The oil-in-water emulsified cosmetic of the present invention has excellent moisturizing feeling and feeling during use. The oil-in-water emulsified cosmetic of the present invention has excellent makeup effect after application, and makeup behavior after applying the oil-in-water emulsified cosmetic of the present invention can be smoothly performed. DETAILED DESCRIPTION

[0012] The oil-in-water emulsified cosmetic (hereinafter also referred to as cosmetic) of the present invention contains (A) to (C).

[0013] (A) 0.1-5% by mass of tranexamic acid; (B) 2-methacryloyloxyethyl phosphorylcholine / octadecyl methacrylate copolymer; (C) Diesters of dicarboxylic acids.

[0014] In the present specification, the expression “A to B (A and B are numerical values)” means a numerical range including the endpoints, that is, not less than A and not more than B.

[0015] (A) Tranexamic acid Tranexamic acid is the abbreviation of trans-4-aminomethylcyclohexane-1-carboxylic acid, and is mainly formulated in cosmetics as a whitening agent or anti-inflammatory agent. As commercially available products, "Japanese Pharmacopoeia Tranexamic Acid" (Maruzen Pharmaceutical Co., Ltd.) can be listed. As tranexamic acid, tranexamic acid or its derivatives can be used, and as derivatives, tranexamic acid salts (metal salts such as magnesium salts, calcium salts, sodium salts, potassium salts, phosphates, hydrochlorides, hydrogen bromides, sulfates, etc.), tranexamic acid esters (vitamin esters such as vitamin A esters, vitamin E esters, vitamin C esters, alkyl esters), tranexamic acid amides, dimers of tranexamic acid, etc. can be used. In addition, tranexamic acid and tranexamic acid derivatives can be used. One or more of them.

[0016] The blending ratio of (A) tranexamic acid is 0.1% by mass or more and 5% by mass or less relative to the total amount of the cosmetic of the present invention. The blending ratio of (A) tranexamic acid is preferably 0.3% by mass or more, more preferably 0.5% by mass or more, and preferably 4% by mass or less, more preferably 3% by mass or less.

[0017] (B) 2-Methacryloyloxyethyl phosphorylcholine / octadecyl methacrylate copolymer Phosphocholine groups are polar groups of phospholipids that constitute cell membranes. Component (B) is a copolymer of 2-methacryloyloxyethyl phosphorylcholine and stearoyl methacrylate that has a phosphorocholine group, and its cosmetic label name is polyquaternium-61. As commercially available products of component (B), "Lipidure-S", "Lipidure-NR", and "Lipidure-NA" (all manufactured by NOF Corporation) can be used.

[0018] The blending ratio of the component (B) is preferably 0.001% by mass to 0.2% by mass, more preferably 0.002% by mass, even more preferably 0.004% by mass, and more preferably 0.16% by mass or less, even more preferably 0.12% by mass or less, based on the total cosmetic of the present invention, from the viewpoint of feeling during use.

[0019] (C) Diesters of dicarboxylic acids The dicarboxylic acid component in the diester of dicarboxylic acid is not particularly limited, and examples thereof include oxalic acid, malonic acid, succinic acid, malic acid, maleic acid, fumaric acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, phthalic acid, isophthalic acid, terephthalic acid, cyclohexanedicarboxylic acid, etc., and one or more thereof can be used. Among these, dicarboxylic acids having 4 to 8 carbon atoms are preferred, and saturated dicarboxylic acids are more preferred.

[0020] The alcohol component in the diester of dicarboxylic acid is not particularly limited, and examples thereof include octanol, 2-ethylhexyl alcohol, stearyl alcohol, isostearyl alcohol, ethoxyethanol, ethoxydiglycol, glycerol, polyglycerol, PEG, etc., and one or more thereof can be used. Among these, monohydric alcohols having 4 to 18 carbon atoms are preferred, and branched aliphatic alcohols having 8 to 18 carbon atoms or alcohols having 4 to 6 carbon atoms and having an ether bond in the molecule are preferred.

[0021] As the diester of dicarboxylic acid, one or more kinds may be used. Specifically, diisostearyl malate, diethylhexyl succinate, diethoxyethyl succinate, bis-diethoxydiglycol cyclohexane 1,4-dicarboxylate, and bisethoxydiglycol succinate are particularly preferred.

[0022] The blending ratio of the component (C) is preferably 0.5% by mass or more and 20% by mass or less, more preferably 0.7% by mass or more, further preferably 0.9% by mass or more, and more preferably 16% by mass or less, further preferably 12% by mass or less, based on the total cosmetic of the present invention, from the viewpoint of feeling during use.

[0023] In the oil-in-water emulsified cosmetic of the present invention, the mass ratio (A / B) of component (A) to component (B) is preferably 15 to 500, more preferably 20 to 400, from the viewpoint of makeup effect.

[0024] In the oil-in-water emulsified cosmetic of the present invention, the mass ratio (A / C) of component (A) to component (C) is preferably 0.1 to 2.5, more preferably 0.2 to 2.0, from the viewpoint of makeup effect.

[0025] The cosmetic of the present invention contains the components (A) to (C), and while maintaining the effects of tranexamic acid, has excellent moisturizing feeling and feeling during use, and also has excellent subsequent makeup effect.

[0026] The cosmetics of the present invention may contain other ingredients used in cosmetics, as long as the effects of the present invention are not impaired, depending on the intended use or effects, etc. Examples of such other ingredients include active ingredients such as polyols, chelating agents, anti-inflammatory agents, emollients, moisturizers, antioxidants, colorants, preservatives, fragrances (including essential oils), thickeners, pH adjusters, various oily ingredients, various aqueous ingredients, etc.

[0027] Example The present invention will be specifically described below with reference to Examples and Comparative Examples.

[0028] (B) 2-Methacryloyloxyethyl phosphorylcholine / octadecyl methacrylate copolymer 2-Methacryloyloxyethyl phosphorylcholine / octadecyl methacrylate copolymer (manufactured by NOF Corporation, Lipidure-S) (b) (B) Similar ingredients 2-Methacryloyloxyethyl phosphorylcholine / butyl methacrylate copolymer (manufactured by NOF Corporation, Lipidure-PMB) Oil Polydimethylsiloxane (manufactured by Dow Toray Co., Ltd., DOWSIL SH200C Fluid 10 cSt) Surfactants Hydrogenated soybean lecithin (Nikko Chemical Co., Ltd., NIKKOL LECINOL S-10) Thickener Acrylic acid / methacrylic acid alkyl ester copolymer (manufactured by Sumitomo Seika Chemicals Co., Ltd., AQUPEC HV-701EDR) Oil-in-water emulsified cosmetics were prepared in the formulations shown in Tables 1 and 2, and evaluated by the following method. The results are shown in Tables 1 and 2.

[0029] "Evaluation Method" ・Sensory evaluation About 50 mg of the oil-in-water emulsified cosmetic was applied to the inner side of the forearm and smeared 40 times in a circular motion within an area of ​​about 30×30 mm with the fingertips. The feeling of use and moisturizing feeling were evaluated according to the following criteria based on the consensus of 3 professional judges.

[0030] (Feeling of use) ・Spreadability during application The so-called spreadability during application refers to the feeling that the cosmetics can be applied and spread without resistance when penetrating into the skin.

[0031] Evaluation criteria: ◎: Very good, ○: Good, △: Slightly poor, ×: Poor ・Thickness when applying The thickness of the product during application refers to the feeling of the cosmetics being able to be felt between the hand and the skin, rather than the feeling of touching the original skin.

[0032] Evaluation criteria: ◎: Very good, ○: Good, △: Slightly poor, ×: Poor ・No stickiness The so-called non-sticky feeling means that after applying cosmetics to the skin, when touching the skin, there is still no stickiness or sticky residual liquid feeling after a certain period of time.

[0033] Evaluation criteria: ◎: Very good, ○: Good, △: Slightly poor, ×: Poor (Moisturizing feeling) Moisturizing sensation refers to the moist feeling you get when you touch your skin after applying cosmetics to it.

[0034] Evaluation criteria: ◎: Very good, ○: Good, △: Slightly poor, ×: Poor ・Evaluation of makeup effect About 50 mg of water-in-oil emulsion cosmetics were applied to the inner side of the forearm, and the skin was smeared 40 times in a circular motion within an area of ​​about 30×30 mm using the fingertips. Next, about 20 mg of liquid foundation (FANCL LIQUID FOUNDATION BRIGHT UP UVb 06) was applied to the area where the water-in-oil emulsion cosmetics were applied, in the same manner as the water-in-oil emulsion cosmetics, and the spreadability and uniformity of the foundation at this time were evaluated by consensus of three professional judges using the following criteria.

[0035] ・Spreadability of foundation The so-called spreadability of foundation refers to the feeling that the foundation can be applied and spread without resistance when it penetrates the skin.

[0036] Evaluation criteria: ◎: Very good, ○: Good, △: Slightly poor, ×: Poor ・Evenness of foundation The so-called uniformity of foundation refers to the state in which after applying the foundation to the skin, there will be no bumps or spots on the skin, and the foundation can be evenly applied and spread.

[0037] Evaluation criteria: ◎: Very good, ○: Good, △: Slightly poor, ×: Poor [Table 1]

[0038] [Table 2]

[0039] The oil-in-water emulsified cosmetics obtained in Examples 1 to 12 of the present invention containing the components (A) to (C) were excellent in feeling during use and moisturizing feeling, and also excellent in subsequent makeup effects.

[0040] The oil-in-water emulsion cosmetics obtained in Comparative Example 1 which does not contain component (B) and Comparative Examples 2 and 3 which use other water-soluble polymers instead of component (B) have poor makeup application and cannot evenly spread the foundation. The oil-in-water emulsion cosmetics obtained in Comparative Examples 4 and 5 which do not contain component (C) have poor moisturizing feeling and feeling during use, and also have slightly poor makeup application.

[0041] The following are formulation examples.

[0042] <Formulation Example 1 Beauty Essence> (mass %) Tranexamic acid 2 Diisostearyl Malate 3 Caprylic / capric triglyceride 1 Neopentyl glycol dicaprate 1 Dipentaerythritol hexahydroxystearate / hexastearate / hexarosinate 0.2 Cetyl palmitate 0.5 Polyoxyethylene sorbitan monostearate (20EO) 0.3 Sorbitan monostearate 0.2 Phytosterols 0.01 Ceramide II0.01 2-Methacryloyloxyethyl phosphorylcholine / octadecyl methacrylate copolymer 0.02 Alcaligenes polysaccharide 0.01 Sodium hyaluronate 0.01 Ethylhexylglycerin 0.1 1,2-Pentanediol 2 Concentrated glycerin 7 Ethanol 3 Refined water 79.64 <Formulation Example 2 Emulsion> (mass %) Tranexamic acid 2 Dipotassium glycyrrhizinate 0.1 BG6 Polydimethylsiloxane 5 Isotridecyl Isononanoate 3.5 Concentrated glycerin 3 Hydrogenated soy lecithin 0.5 Sorbitan stearate 0.5 Polyoxyethylene sorbitan monostearate 0.3 Acrylic acid and alkyl methacrylate copolymer 0.3 2-Methacryloyloxyethyl phosphorylcholine / octadecyl methacrylate copolymer 0.01 Carbomer 0.05 Phytosteryl Isostearyl Dimer Linoleate 0.5 Ethylhexylglycerin 0.1 1,2-Pentanediol 2 Glyceryl Polyether-263 Diisostearyl Malate 1 Refined water 72.14 <Formulation Example 3 Cream> (mass %) Tranexamic acid 2 Concentrated glycerin 15 Macadamia ternifolia seed oil4 Polydimethylsiloxane 2 Glyceryl tri(ethylhexanoate)4 Stearic acid 4 Plant Squalane 2 BG7 Polyoxyethylene sorbitan monostearate 2 Acrylic acid and methacrylic acid alkyl ester copolymer 0.05 2-Methacryloyloxyethyl phosphorylcholine / octadecyl methacrylate copolymer 0.1 Carbomer 0.05 Diisostearyl Malate 5 Xanthan gum 0.05 1,2-Pentanediol 1.5 Diglycerol 3 Potassium hydroxide 0.01 Sorbitan stearate 1 Behenyl alcohol 2 Refined water 45.24

Claims

1. An oil-in-water emulsified cosmetic, characterized in that: Contains (A)~(C): (A) 0.1-5% by mass of tranexamic acid; (B) 2-methacryloyloxyethyl phosphorylcholine / octadecyl methacrylate copolymer; (C) Diesters of dicarboxylic acids.

2. The oil-in-water emulsified cosmetic according to claim 1, characterized in that: The component (C) is a diester of a dicarboxylic acid having 4 to 8 carbon atoms and a monohydric alcohol having 4 to 18 carbon atoms.

3. The oil-in-water emulsified cosmetic according to claim 1 or 2, characterized in that: The component (C) is at least one selected from the group consisting of diisostearyl malate, diethylhexyl succinate, diethoxyethyl succinate, bis-diethoxydiglycol cyclohexane 1,4-dicarboxylate, and bisethoxydiglycol succinate.

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