Aqueous cosmetic

Abstract

To provide a novel aqueous cosmetic which enables the skin to appear beautiful, and which exhibits excellent film durability and moisture retention.SOLUTION: An aqueous cosmetic comprises the following components (A) to (D): (A) acrylates crosspolymer-2 Na, (B) a zwitterionic polymer containing a phosphorylcholine group, (C) a film-forming agent, and (D) water.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a cosmetic preparation, and more particularly to an aqueous cosmetic preparation having soft focus properties. [Background technology]

[0002] As a result of efforts to prevent the spread of COVID-19, people are shifting to new lifestyles, such as spending more time at home by working from home, taking online classes, and limiting eating out, and wearing masks has become a daily occurrence. As a result of this, people are spending more time without makeup, and as a result, the number of women who prefer natural makeup or no makeup at all is on the rise, and there is a growing desire to have beautiful skin even when not wearing makeup. Cosmetics with soft focus properties are known to meet such demands. The soft focus effect is an effect in which irregularities and wrinkles on the skin are blurred by the diffuse reflection of light by spherical powder, making the skin appear more transparent and smoother. This effect is also called the defocus effect. This effect has the advantage of looking more natural than skin appearance correction using pigments such as titanium oxide.

[0003] As examples of cosmetics with soft focus properties, Patent Document 1 proposes a cosmetic containing sodium acrylate-grafted starch, Patent Document 2 proposes a cosmetic containing surface-treated spherical powder in which a base spherical powder has been treated with two or more types of surface treatment agents having a higher refractive index than the spherical powder in descending order of refractive index, and Patent Document 3 proposes an oil-in-water emulsion cosmetic containing a silicone elastomer powder with a soft focus effect. However, all of these have problems such as insufficient soft focus effect, durability, moisturizing feeling, etc. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2021-038180 A [Patent Document 2] JP 2005-154279 A [Patent Document 3] International Publication No. 2021 / 002285 Summary of the Invention [Problem to be solved by the invention]

[0005] To provide a novel aqueous cosmetic which can make the skin look beautiful by its soft focus effect and has excellent film durability and moisturizing properties. [Means for solving the problem]

[0006] The means for solving the problems of the present invention are as follows. 1. An aqueous cosmetic preparation comprising the following components (A) to (D): (A) Acrylates crosspolymer-2-Na (B) Amphoteric polymer containing phosphorylcholine groups (C) Film-forming agent (D)Water 2. The aqueous cosmetic preparation according to 1, characterized in that the content of (A) relative to the total amount is from 0.3% by mass to 5.0% by mass. 3. An aqueous cosmetic preparation according to 1. or 2., characterized in that it contains as component (C) one or more selected from the group consisting of carboxymethyldextran sodium, tremella fuciformis polysaccharide, (acrylates / C10-30 alkyl acrylate) crosspolymer, and sodium hyaluronate. Effect of the Invention

[0007] The aqueous cosmetic composition of the present invention has soft focus properties and can make the skin look beautiful without makeup. The aqueous cosmetic composition of the present invention has excellent film durability, exhibits a soft focus effect for a long time, and also has an excellent moisturizing feeling, so that it can be worn all day without feeling uncomfortable. According to the aqueous cosmetic composition of the present invention, the skin can be given a silky feel after application, and a bare skin-like finish and freshness can be achieved at the same time. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The aqueous cosmetic preparation of the present invention contains the following components (A) to (D). (A) Acrylates crosspolymer-2-Na (B) Amphoteric polymer containing phosphorylcholine groups (C) Film-forming agent (D)Water

[0009] (A) Component: Acrylates crosspolymer-2-Na Acrylates crosspolymer-2-Na is a water-absorbent spherical powder, which is the sodium salt of a copolymer consisting of one or more monomers of acrylic acid, methacrylic acid, or their simple esters crosslinked with ethylene glycol diglycidyl ether. The acrylate crosspolymer-2-Na is not particularly limited, and can be synthesized by various methods. Commercially available products include "ARON NT-Z" manufactured by Nikko Chemicals Co., Ltd. and "AQUAKEEP 10SH-NFC" manufactured by Sumitomo Seika Chemicals Co., Ltd.

[0010] The aqueous cosmetic of the present invention preferably contains 0.3% by mass or more and 5.0% by mass or less of component (A) relative to the entire cosmetic. Acrylates crosspolymer-2-Na is a water-absorbent powder, and the aqueous cosmetic of the present invention contains the above-mentioned amount of acrylates crosspolymer-2-Na relative to the entire cosmetic, thereby providing excellent soft focus properties, film durability, moisturizing feel, etc. The amount of component (A) relative to the entire cosmetic is more preferably 0.4% by mass or more, even more preferably 0.5% by mass or more, more preferably 4.5% by mass or less, and even more preferably 4.0% by mass or less. The aqueous cosmetic preparation of the present invention may contain powders other than acrylates crosspolymer-2-Na within the range that does not impair the effects of the present invention, such as pigments, inorganic powders, organic powders, etc. The proportion of acrylates crosspolymer-2-Na to the total powders is preferably 80% by mass or more, more preferably 90% by mass or more, and most preferably 100% by mass.

[0011] Component (B): Amphoteric polymer containing phosphorylcholine groups Component (B) has a phosphorylcholine group. The phosphorylcholine group is shown in the following formula (1). The phosphorylcholine group is a polar group portion of phospholipids that constitute cell membranes, and is an amphoteric polar group. [ka] Examples of the phosphorylcholine group-containing amphoteric polymer include polyquaternium-51, polyquaternium-61, polyquaternium-64, polyquaternium-65, polymethacryloyloxyethyl phosphorylcholine, etc., and polyquaternium-51, polyquaternium-61, and polymethacryloyloxyethyl phosphorylcholine are preferred. All of these are commercially available from NOF Corporation.

[0012] The aqueous cosmetic of the present invention preferably contains 0.01% by mass or more and 0.5% by mass or less of the (B) component relative to the entire cosmetic. The aqueous cosmetic of the present invention contains the phosphorylcholine group-containing amphoteric polymer in the above-mentioned amount relative to the entire cosmetic, and thus has excellent film durability, moisturizing feel, etc. The amount of the (B) component relative to the entire cosmetic is more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, more preferably 0.3% by mass or less, and even more preferably 0.1% by mass or less.

[0013] Component (C): Film-forming agent The film-forming agent is a polymer capable of forming a film on the skin and fixes the powdery component (A) onto the skin. As the film-forming agent, known ones can be used, for example, one or more of carboxymethyl dextran Na, Tremella fuciformis polysaccharide, (acrylates / alkyl acrylate (C10-30)) crosspolymer, sodium hyaluronate, xanthan gum, sclerotium gum, guar gum, carrageenan, dextrin, gelatin, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, 1,1-methylene-bis(4-isocyanatocyclohexane) polypropylene copolymer, etc. Among these, one or more selected from the group consisting of carboxymethyl dextran Na, Tremella fuciformis polysaccharide, (acrylates / alkyl acrylate (C10-30)) crosspolymer, and sodium hyaluronate are preferred because they provide a cosmetic composition with excellent film durability and moisturizing feeling.

[0014] The aqueous cosmetic of the present invention preferably contains component (C) in an amount of 0.01% by mass or more and 1.0% by mass or less relative to the entire cosmetic. The aqueous cosmetic of the present invention contains the film-forming agent in the amount described above relative to the entire cosmetic, and thus has excellent film durability, moisturizing feel, etc. The amount of component (C) in the entire cosmetic is more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, more preferably 0.5% by mass or less, and even more preferably 0.2% by mass or less.

[0015] (D) Component: Water The water that can be used in the aqueous cosmetic preparation of the present invention can be any water that can be used in cosmetics, topical medicines, quasi-drugs, etc., but purified water, distilled water, membrane-filtered water, and ion-exchanged water are preferred. The water may be used alone or in combination of two or more of the above. The aqueous cosmetic preparation of the present invention is an aqueous cosmetic preparation that contains water and a water-soluble component as the main components (D), and also includes oil-in-water emulsion cosmetic preparations. The blending amount of component (D) may be appropriately set, but is preferably 50% by mass or more, and more preferably 70% by mass or more, based on the total amount of the cosmetic.

[0016] In the aqueous cosmetic preparation of the present invention, the mass ratio (A / (B+C)) of the total of the components (B) and (C) to the component (A) is preferably 1.0 or more, and more preferably 2.0 or more, from the viewpoints of soft focus properties, film durability, and moisturizing feeling, and is preferably 30 or less, and more preferably 25 or less.

[0017] From the viewpoints of soft focus properties and moisturizing feeling, the aqueous cosmetic preparation of the present invention preferably has a medium viscosity with good fluidity. Specifically, the viscosity measured with a B-type viscometer (25°C, rotor No. 1 to No. 4, 12 revolutions, 30 seconds) is preferably 200 mPa·s or more, more preferably 500 mPa·s or more, and even more preferably 1000 mPa·s or more, and is preferably 20000 mPa·s or less, more preferably 15000 mPa·s or less, and even more preferably 10000 mPa·s or less.

[0018] In addition to the components (A) to (D), the aqueous cosmetic preparation of the present invention may contain components that are usually used in cosmetics, such as polyhydric alcohols, sugars, sugar alcohols, pigments, inorganic powders, organic powders, plant extracts, pH adjusters, salts, thickeners, preservatives, sequestering agents, colorants, and fragrances. It may also contain other medicinal ingredients and physiologically active ingredients. However, in terms of soft focus properties, the aqueous cosmetic preparation of the present invention preferably contains 10% by mass or less of oil relative to the entire cosmetic preparation, more preferably 5.0% by mass or less, even more preferably 3.0% by mass or less, and even more preferably 1.0% by mass or less.

[0019] Examples of polyhydric alcohols, sugars, and sugar alcohols include glycerin, diglycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, 1,2-pentanediol, glucose, sorbitol, mannose, mannitol, galactose, galactitol, maltose, maltitol, trehalose, erythrose, erythritol, xylose, xylitol, sucrose, lactose, lactitol, difructose anhydride, methyl gluceth-10, PPG-10 methyl glucose, and glycereth-26.

[0020] Examples of pigments, inorganic powders, and organic powders include talc, kaolin, silica, mica, zeolite, bentonite, titanium dioxide, iron oxide, crystalline cellulose, nylon powder, poly(meth)acrylic acid ester, polymethylsilsesquioxane powder, etc. However, the blending amount of powders other than component (A) relative to the entire cosmetic is preferably 1.0% by mass or less, more preferably 0.5% by mass or less, and even more preferably 0.2% by mass or less, from the viewpoints of film durability and moisturizing feeling.

[0021] The thickening agent may include carbomer. Examples of preservatives include methylparaben and ethylparaben. Examples of the sequestering agent include disodium ethylenediaminetetraacetate, edetic acid, and edetate salts such as sodium edetate. Examples of medicinal ingredients include vitamin C compounds such as L-ascorbic acid, L-ascorbic acid phosphate, L-ascorbic acid monopalmitate, L-ascorbic acid dipalmitate, and L-ascorbic acid 2-glucoside; skin whitening agents such as glutathione and saxifrage extract; skin activators such as royal jelly and beech extract; blood circulation promoters such as capsaicin, zingerone, cantharides tincture, caffeine, tannic acid, and γ-oryzanol; anti-inflammatory agents such as glycyrrhizinic acid derivatives and azulene; and lysozyme chloride.

[0022] The aqueous cosmetic preparation of the present invention can be used as a skin lotion, emulsion, beauty essence, body lotion, etc. EXAMPLES

[0023] Cosmetics were obtained by mixing the components according to the compositions in Tables 1 to 3 (the numerical values ​​for the blending amounts indicate mass %) with stirring. The obtained cosmetics were evaluated by the following methods, and the results are shown in Tables 1 to 3.

[0024] <Evaluation method> Soft focus 2.5 g of the cosmetic sample was weighed out and placed in a 3 cm diameter plastic petri dish (Falcon Cell Culture Dish, Model 353001) and allowed to stand at 50°C. After leaving the sample standing for 15 minutes, the following evaluations were performed every minute. The evaluation sample was placed on a sheet printed with black characters with a score of 1 to 5 (light to dark) in five stages according to RGB values, and the lowest score at which the characters could be visually distinguished was confirmed. This observation was continued for up to 60 minutes, and the highest score confirmed after 60 minutes was regarded as the evaluation result, and was evaluated according to the following criteria. The shade levels are shown below. Score: 5◎ 4〇 3△ 2,1× JPEG2025074797000002.jpg51170

[0025] · Coating durability In the evaluation of the soft focus property, those which cracked within 60 minutes after standing were marked with "x", and those which did not crack after 60 minutes were marked with "good".

[0026] Moisturizing feeling Three expert panelists applied 0.3 g of the cosmetic to the back of their hands, and evaluated the moisturizing feeling 60 minutes after application in accordance with the following criteria by consensus. ◎: Feels very moisturizing. Good: Feels slightly moisturizing. △: Slight moisturizing sensation. ×: No moisturizing sensation.

[0027] [Table 1]

[0028] [Table 2]

[0029] [Table 3]

[0030] The cosmetic composition containing the components (A) to (D) of the present invention was excellent in soft focus properties, as well as in film durability and moisturizing feel. The cosmetics obtained in Comparative Examples 1 to 6, in which other powder component (A') was used instead of component (A), were inferior in any of soft focus properties, film durability, and moisturizing feeling. The cosmetic obtained in Comparative Example 7, in which sodium dilauramidoglutamide lysine was used as component (B), was poor in film durability. The cosmetic preparation obtained in Comparative Example 8, which did not contain component (C), was inferior in film durability and moisturizing feel.

[0031] An example of a prescription is shown below. Formulation example 1: Serum (Ingredients) (mass%) water residue Acrylates Crosspolymer-2-Na 3.0 BG 5.0 Pentylene glycol 1.5 Glycerin 1.0 Glycereth-26 2.0 Methylgluceth-10 1.0 Betaine 1.0 Raffinose 0.1 Dipotassium glycyrrhizinate 0.01 Polyquaternium-51 0.1 Carboxymethyl dextran sodium 0.1 Carbomer 0.04 Potassium hydroxide 0.004

[0032] Formulation example 2: Serum (Ingredients) (mass%) water residue Acrylates Crosspolymer-2-Na 3.0 BG 5.0 Pentylene glycol 1.5 Glycerin 1.0 Glycereth-26 2.0 Betaine 1.0 Raffinose 0.1 Cyanocobalamin 0.003 Polyquaternium-51 0.1 Tremella polysaccharide 0.08 Carbomer 0.03 Potassium hydroxide 0.003

[0033] Formulation example 3 Gel milk (Ingredients) (mass%) water residue Acrylates Crosspolymer-2-Na 3.0 BG 5.0 Pentylene glycol 1.5 Glycerin 1.0 Glycereth-26 2.0 Betaine 1.0 Polyquaternium-51 0.05 Hydrogenated lecithin 0.1 Phytosteryl / Octyldodecyl Lauroyl Glutamate 0.05 Squalane 0.50 Carboxymethyl dextran sodium 0.1 Sodium hyaluronate 0.01 Carbomer 0.05 Potassium hydroxide 0.001

[0034] Formulation example 4: Cosmetic liquid (Ingredients) (mass%) water residue Acrylates Crosspolymer-2-Na 0.5 BG 5.0 Pentylene glycol 1.5 Glycereth-26 2.0 Methylgluceth-10 1.0 Betaine 0.5 Polyquaternium-51 0.005 Sodium hyaluronate 0.05 (Acrylates / Alkyl acrylate (C10-30)) Crosspolymer 0.05 Potassium hydroxide 0.005

[0035] Formulation example 5: Cosmetic liquid (Ingredients) (mass%) water residue Acrylates Crosspolymer-2-Na 0.5 BG 5.0 Pentylene glycol 1.5 Glycereth-26 2.0 Betaine 0.5 Polyquaternium-51 0.01 Sodium hyaluronate 0.01 (Acrylates / Alkyl acrylate (C10-30)) Crosspolymer 0.05 Potassium hydroxide 0.005

Claims

1. An aqueous cosmetic preparation comprising the following components (A) to (D): (A) Acrylates crosspolymer-2-Na (B) Phosphorylcholine group-containing amphoteric polymer (C) Film-forming agent (D) Water

2. 2. The aqueous cosmetic preparation according to claim 1, wherein the content of (A) relative to the total amount is 0.3% by mass or more and 5.0% by mass or less.

3. 3. The aqueous cosmetic preparation according to claim 1, further comprising, as component (C), one or more selected from the group consisting of sodium carboxymethyl dextran, tremella fuciformis polysaccharide, acrylates / C10-30 alkyl acrylate crosspolymer, and sodium hyaluronate.

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