Oil-based emulsions in water

Abstract

The present invention relates to an oil-in-water emulsion containing (a) at least one plant-derived component selected from the group consisting of a tororo aoi extract, a Foliota microspora polysaccharide, and a quince seed extract, (b) a niosome containing a nonionic surfactant, (c) a thickener different from the component (a), (d) an oil agent, and (e) an aqueous medium.

Description

[Technical Field]

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

[0002] Silicones are widely used in cosmetics to reduce stickiness and provide moisturizing effects. In recent years, due to growing consumer awareness of the environment, there has been a rapid increase in demand for cosmetics that do not use silicone, a synthetic polymer compound (for example, JP 2014-533288). Summary of the Invention [Problem to be solved by the invention]

[0003] In light of the above-mentioned background, an object of the present invention is to provide an oil-in-water emulsion that is silicone-free, yet non-sticky, and has excellent moisturizing effect. [Means for solving the problem]

[0004] The present invention aims to provide an oil-in-water emulsion that does not use silicone and exhibits excellent moisturizing effects without stickiness, and relates to the following composition: an oil-in-water emulsion containing (a) at least one plant-derived component selected from the group consisting of Polygala japonica extract, Foliota microspora polysaccharides, and quince seed extract, (b) niosomes containing a nonionic surfactant, (c) a thickener different from component (a), (d) an oil, and (e) an aqueous medium. Note that in this specification, "(a) at least one plant-derived component selected from the group consisting of Polygala japonica extract, Foliota microspora polysaccharides, and quince seed extract" may sometimes be referred to as "component (a)," and similar abbreviations will be used for other components.

[0005] In a specific embodiment, the nonionic surfactant included in component (b) is a polyglycerin fatty acid ester.

[0006] In a specific embodiment, the component (c) contains at least one selected from the group consisting of a (meth)acrylic polymer and a polysaccharide different from the polysaccharide contained in the component (a).

[0007] In certain embodiments, component (d) comprises a vegetable oil.

[0008] In certain embodiments, the oil-in-water emulsion further comprises an electrolyte.

[0009] In certain embodiments, the oil-in-water emulsion is silicone-free.

[0010] In a specific embodiment, the content of component (a) is 0.5 to 30 mass %, preferably 0.8 to 28 mass %, and more preferably 1 to 25 mass %, based on the total amount of the oil-in-water emulsion.

[0011] In a specific embodiment, the content of component (b) is 0.1 to 5 mass %, preferably 0.3 to 4.5 mass %, and more preferably 0.5 to 4 mass %, based on the total amount of the oil-in-water emulsion.

[0012] In a specific embodiment, the content of component (c) is 0.1 to 3 mass %, preferably 0.15 to 2.8 mass %, and more preferably 0.2 to 2.5 mass %, based on the total amount of the oil-in-water emulsion.

[0013] The oil-in-water emulsion may be in the form of a lotion, emulsion, serum, makeup remover, makeup base, foundation, or concealer.

[0014] Another aspect of the present invention relates to a cosmetic method for caring for and / or making up keratinous materials, in particular skin, which comprises applying the oil-in-water emulsion described above.

[0015] As shown in the examples, the present invention provides an oil-in-water emulsion that is silicone-free, yet is non-sticky and has excellent moisturizing effects. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to the following embodiments.

[0017] (a) Ingredients The oil-in-water emulsion of the present invention contains (a) at least one plant-derived component selected from the group consisting of Polygala globulus extract, Foliota microspora polysaccharides, and Quince seed extract.

[0018] As used herein, "Hibiscus abelmoschus extract" refers to an extract obtained from the whole plant of Hibiscus abelmoschus (specifically, one or more parts selected from the roots, leaves, stems, flowers, seeds, and fruits of Hibiscus abelmoschus). As used herein, "quince seed extract" refers to an extract obtained from quince (Cydonia oblonga) seeds. The quince seed extract and the quince seed extract may be extracted with water or a mixture of water and a water-soluble solvent (e.g., monools such as ethanol, propyl alcohol, and isopropyl alcohol; polyhydric alcohols such as ethylene glycol, propanediol (1,2-propanediol, 1,3-propanediol), propylene glycol, butylene glycol, pentylene glycol (1,2-pentanediol), hexylene glycol, 1,2-hexanediol, and glycerin; and mixtures thereof). However, an extract extracted with a mixture of a polyhydric alcohol and water is preferred. A commercially available quince extract is, for example, ABELMOSK E5822 (sold by SINA BT), which contains water, glycerin, and 1,2-hexanediol as extraction solvents. As a commercially available product of quince seed extract, for example, QUINCESEED 2 SP (sold by DAINIHON KASEI) containing water and butylene glycol as extraction solvents can be used.

[0019] As used herein, "Foliota microspora polysaccharides" refers to a polysaccharide fraction isolated from Foliota microspora. Foliota microspora is a type of mushroom belonging to the genus Suillus in the family Coriolus. Commercially available Foliota microspora polysaccharides include, for example, PHOLITECT BG (sold by KOKEN), which contains water and butylene glycol as solvents.

[0020] In a specific embodiment, the content of component (a) is 0.5 to 30% by mass, preferably 0.8 to 28% by mass, and more preferably 1 to 25% by mass, based on the total mass of the oil-in-water emulsion. In fact, the applicant has surprisingly found that when the content of component (a) is within this range, a high moisturizing effect and a non-sticky feel can be obtained.

[0021] (b) Component The oil-in-water emulsion of the present invention contains (b) a niosome containing a nonionic surfactant. As used herein, "niosome" refers to a bilayer membrane closed vesicle formed by a nonionic surfactant.

[0022] The present inventors have surprisingly found that component (a) can impart a silicone-like non-sticky feel and moisturizing effect to the composition, and that by combining component (a) with niosomes, a stable emulsified state can be achieved.

[0023] Examples of nonionic surfactants contained in component (b) include polyglycerin fatty acid esters (e.g., polyglyceryl-2 laurate, polyglyceryl-2 stearate, polyglyceryl-2 oleate, polyglyceryl-2 isostearate, polyglyceryl-4 isostearate, polyglyceryl-10 laurate, polyglyceryl-10 myristate, polyglyceryl-10 stearate, polyglyceryl-10 oleate, polyglyceryl-10 isostearate, Polyglyceryl-10 diisostearate, polyglyceryl-2 diisostearate, polyglyceryl-3 diisostearate, polyglyceryl-10 diisostearate, etc.), glycerin fatty acid esters (e.g., glyceryl myristate, glyceryl stearate, glyceryl isostearate, glyceryl oleate, glyceryl diisostearate, etc.), sorbitan fatty acid esters (e.g., sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, mono Examples of suitable surfactants include sorbitan isostearate, sorbitan monooleate, sorbitan tristearate, sorbitan trioleate, etc., sucrose fatty acid esters, polyoxyethylene alkyl ethers (e.g., polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, etc.), polyoxyethylene alkylphenyl ethers, alkyl glucosides (e.g., decyl glucoside, lauryl glucoside, cocoglycoside, etc.), fatty acid polyethylene glycols (e.g., polyethylene glycol monolaurate, polyethylene glycol monostearate, etc.), fatty acid polyoxyethylene sorbitan (e.g., polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan tristearate, polyoxyethylene sorbitan trioleate, etc.), and mixtures thereof. The nonionic surfactants used in the composition may be used alone or in combination of two or more. Among these, polyglycerin fatty acid esters are preferred because they can provide better emulsion stability.As a niosome containing a polyglycerin fatty acid ester, for example, NIKKOL Nikosom (registered trademark) PV-PF containing polyglyceryl-10 laurate and polyglyceryl-10 diisostearate can be used.

[0024] In certain embodiments, component (b) contains, in addition to a nonionic surfactant, a polyol (e.g., glycerin, ethylene glycol, 1,3-propanediol, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, dipropylene glycol, polyethylene glycol, glycerin, diglycerin, polyglycerin), a higher fatty acid (e.g., lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid) or a salt thereof, citric acid or a salt thereof, water, and mixtures thereof.

[0025] In a specific embodiment, the content of component (b) is 0.1 to 5% by mass, preferably 0.3 to 4.5% by mass, and more preferably 0.5 to 4% by mass, based on the total mass of the oil-in-water emulsion. In fact, the present applicant has surprisingly found that when the content of component (b) is within this range, the emulsion has less stickiness, a high moisturizing effect, and excellent emulsion stability.

[0026] (c) Component The oil-in-water emulsion of the present invention contains (c) a thickener different from component (a). The thickener is a component that can impart a thickening effect to the composition, and examples thereof include (meth)acrylic polymers, polysaccharides different from the polysaccharides contained in component (a), and mixtures thereof.

[0027] As used herein, the term "(meth)acrylic polymer" refers to a polymer containing (meth)acrylic acid and / or its derivatives, such as (meth)acrylic acid, (meth)acrylic acid esters, and (meth)acrylamide, as structural units. Specific examples of polymers containing (meth)acrylic as structural units include sodium polyacrylate, sodium starch polyacrylate, carboxyvinyl polymer (carbomer), and mixtures thereof. Specific examples of polymers containing (meth)acrylic acid esters as structural units include acrylic acid / alkyl methacrylate copolymer, (acrylates / C10-30 alkyl acrylate) crosspolymer, (acrylates / ethylhexyl acrylate) copolymer, (acrylates / steareth-20 methacrylate) copolymer, (acrylates / beheneth-25 methacrylate) copolymer, and mixtures thereof. Specific examples of polymers containing (meth)acryloylalkyltaurine or its salt as a structural unit include (ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, (ammonium acryloyldimethyltaurate / VP) copolymer, (ammonium acryloyldimethyltaurate / carboxyethylammonium acrylate) crosspolymer, (acrylamide / sodium acryloyldimethyltaurate) copolymer, (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer, (sodium acrylate / acryloyldimethyltaurate / dimethylacrylamide) crosspolymer, (sodium acryloyldimethyltaurate / VP) crosspolymer, polyammonium acryloyldimethyltaurate, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, polysodium acryloyldimethyltaurate, and mixtures thereof. In this specification, "VP" refers to vinylpyrrolidone.

[0028] Examples of polysaccharides other than those contained in component (a) include xanthan gum, gellan gum, sclerotium gum, gum arabic, guar gum, locust bean gum, tara gum, tremella fuciformis polysaccharide, hyaluronic acid or a salt thereof, chondroitin sulfate or a salt thereof, pectin, carrageenan, agar, alginic acid or a salt thereof, starch, dextrin, methylcellulose, ethylcellulose, hydroxyethylcellulose, and mixtures thereof.

[0029] Component (c) may be used singly or in combination of two or more. Among components (c), carboxyvinyl polymer (carbomer), acrylic acid / alkyl methacrylate copolymer, (acrylates / C10-30 alkyl acrylate) crosspolymer, (ammonium acryloyldimethyltaurate / VP) copolymer, xanthan gum, gum arabic, and combinations thereof are preferred because they can improve emulsion stability.

[0030] In a specific embodiment, the content of component (c) is 0.1 to 3 mass %, preferably 0.15 to 2.8 mass %, and more preferably 0.2 to 2.5 mass %, based on the total mass of the oil-in-water emulsion. In fact, the applicant has surprisingly found that when the content of component (c) is within this range, excellent emulsion stability is achieved.

[0031] (d) Ingredients The oil-in-water emulsion of the present invention contains (d) an oil agent. The oil agent may be in the form of a liquid, a paste, or a solid. Examples of oils include vegetable oils (e.g., avocado oil, linseed oil, argan oil, almond oil, apricot kernel oil, olive oil, kukui nut oil, grapeseed oil, rice bran oil, safflower oil, shea butter, soybean oil, camellia oil, evening primrose oil, calendula seed oil, sunflower oil, castor oil, jojoba oil, macadamia nut oil, palm oil, meadowhoo oil, and rosehip oil), hydrocarbon oils (e.g., liquid paraffin, light liquid isoparaffin, dodecane, isododecane, tetradecane, isotetradecane, hexadecane, isohexadecane, squalane, petrolatum, polyisobutylene, and polybutene), waxes (e.g., beeswax, lanolin, carnauba wax, candelilla wax, and gay wax), and mixtures thereof.

[0032] The component (d) may be used alone or in combination of two or more. Among the components (d), vegetable oils are preferred.

[0033] In a specific embodiment, the content of component (d) is 0.01 to 3 mass %, preferably 0.01 to 2.5 mass %, and more preferably 0.1 to 2.5 mass %, based on the total amount of the oil-in-water emulsion.

[0034] (e) Component The oil-in-water emulsion of the present invention contains (e) an aqueous medium. The aqueous medium may contain only water, or may further contain a water-soluble solvent.

[0035] As the water, distilled water, purified water, hot spring water, deep sea water, steam-distilled water derived from plants (lavender water, rose water, orange flower water, etc.), and mixtures thereof can be used.

[0036] Examples of water-soluble solvents include monools such as ethanol, propyl alcohol, isopropyl alcohol, and phenoxyethanol; polyhydric alcohols such as ethylene glycol, propanediol (1,2-propanediol, 1,3-propanediol), propylene glycol, butylene glycol, pentylene glycol (1,2-pentanediol), hexylene glycol, 1,2-hexanediol, dipropylene glycol, polyethylene glycol, glycerin, diglycerin, polyglycerin, sorbitol, xylitol, mannitol, caprylyl glycol, and polyoxyalkylene methyl glucoside (methyl gluceth-10, methyl gluceth-20), and mixtures thereof. One water-soluble solvent may be used alone, or two or more may be used in combination. Among these, glycerin, butylene glycol, pentylene glycol, propanediol, and mixtures thereof are preferred.

[0037] In a specific embodiment, the content of component (e) is 25 to 95 mass %, preferably 25 to 90 mass %, and more preferably 30 to 90 mass %, based on the total amount of the oil-in-water emulsion.

[0038] Other ingredients The oil-in-water emulsion of the present invention may further contain an electrolyte. In this specification, an "electrolyte" is a component different from the above-mentioned components (a) to (e), which ionizes in the composition and functions as an activator, preservative, antioxidant, pH adjuster, etc. When an electrolyte is contained in an oil-in-water emulsion, the emulsion tends to be easily destroyed, but the combination of the above-mentioned components (a) to (c) maintains stability even when an electrolyte is contained.

[0039] Examples of electrolytes that function as activators include amino acids (e.g., adenosine), vitamins (e.g., sodium tocopheryl phosphate), sugars (e.g., gluconolactone), plant-derived components different from component (a) (e.g., Centella asiatica leaf extract, iris root extract, mallow flower / leaf / stem extract, rose extract, and damask rose flower extract), and mixtures thereof. Examples of electrolytes that function as preservatives include sodium benzoate, potassium sorbate, chlorphenesin, hydroxyacetophenone, and mixtures thereof. Examples of electrolytes that function as antioxidants include citric acid. Examples of pH adjusters include malic acid, citric acid, lactic acid, phosphoric acid, and salts thereof; sodium hydroxide, potassium hydroxide, arginine; and mixtures thereof. The electrolytes may be used alone or in combination.

[0040] In a specific embodiment, the content of the electrolyte is 0.01 to 6 mass %, preferably 0.05 to 6 mass %, and more preferably 0.05 to 5.5 mass %, based on the total amount of the oil-in-water emulsion.

[0041] In addition to the above components, the oil-in-water emulsion of the present invention may contain other additives such as pH adjusters, chelating agents, anti-fading agents, stabilizers, powders, pigments, fragrances, etc., as appropriate to impart various effects.

[0042] In order to minimize the environmental impact, the oil-in-water emulsion of the present invention preferably does not contain silicone (is silicone-free). In this specification, "silicone" refers to a compound having a siloxane bond (Si-O-Si) in its basic skeleton, in which silicon and oxygen are alternately linked. Examples of silicone include silicone oils such as dimethicone, trisiloxane, cyclopentasiloxane, cyclohexasiloxane, cyclomethicone, diphenyl dimethicone, phenyl trimethicone, and diphenylsiloxyphenyl trimethicone; and modified silicone oils such as stearyl dimethicone, cetyl dimethicone, (stearoxymethicone / dimethicone) copolymer, amodimethicone, aminopropyl dimethicone, bisaminopropyl dimethicone, and biscetearyl amodimethicone.

[0043] The oil-in-water emulsion of the present invention can be prepared, for example, by a method comprising at least the following steps. (1) Component (e) and other aqueous components are mixed to obtain mixture A. (2) Component (c) is added to mixture A, and the mixture is heated and stirred until homogenous (preferably at a temperature in the range of 70°C to 90°C), and then cooled to obtain mixture B. (3) Components (a), (b), and (d), as well as optional electrolytes and other oily components, are added to mixture B and stirred until uniform.

[0044] In certain embodiments, the oil-in-water emulsion of the present invention is used as a skin care cosmetic or a makeup cosmetic, for example, a lotion, a milky lotion, a serum, a makeup remover, a makeup base, a foundation, a concealer, or the like.

[0045] The oil-in-water emulsion according to this embodiment can be applied as a cosmetic to keratinous materials, particularly skin, by application, etc. That is, the present invention can also provide a cosmetic method for caring for and / or making up keratinous materials, which comprises applying the oil-in-water emulsion defined in the present invention to keratinous materials, particularly skin. [Example]

[0046] The present invention will be specifically explained below with reference to examples, but the present invention is not limited to these examples.

[0047] <Preparation of oil-in-water emulsion> The oil-in-water emulsions of Examples 1 to 20 (according to the present invention) and Comparative Examples 1 to 7 were prepared using the cosmetic agents and / or ingredients shown in Tables 1 to 4. The values ​​shown in Tables 1 to 4 are all in mass % based on the total amount of the oil-in-water emulsion. First, the aqueous medium (phase A) shown in the table was mixed at room temperature until homogeneous. The thickener (phase B) was added to the resulting mixture, which was stirred at a temperature range of 80 to 85°C until homogeneous, and then cooled to 40°C. The plant-derived component (phase C), vesicles (phase D), vegetable oil (phase E), and electrolyte (phase F) were added to the resulting mixture, which was then stirred at room temperature until homogeneous, to obtain an oil-in-water emulsion.

[0048] <Sensory evaluation> The non-stickiness and moisturizing effect of each composition upon application were evaluated by a five-member cosmetics expert evaluation panel in a single-use skin test, according to the following criteria. The evaluation results were calculated by adding up the scores of the five panelists, with a total score of 12 or more given an A, 8 to 11 points given a B, and 5 to 7 points given a C. The results are shown in Tables 1 to 3. (Evaluation criteria for non-stickiness) A (3 points): Non-sticky and smooth B (2 points): Slightly sticky and lacking in smoothness C (1 point): Sticky and lacking in smoothness (Evaluation criteria for moisturizing effect) A (3 points): Excellent moisturizing effect B (2 points): Slightly less moisturizing C (1 point): Poor moisturizing effect

[0049] As shown in Tables 1 to 3, the compositions of Examples 1 to 20 according to the present invention were all smooth and non-sticky, and had excellent moisturizing effects. On the other hand, the compositions of Comparative Examples 1 to 6 were sticky and lacked smoothness or had poor moisturizing effects, and the composition of Comparative Example 7 did not maintain a stable emulsified state, as described below (see Table 4).

[0050] <Evaluation of emulsion stability> Each composition was filled into a transparent glass container and sealed. This was placed in a thermostatic chamber at 50°C and allowed to stand for one month. After standing, the emulsion stability was evaluated visually according to the following criteria. The results are shown in Tables 1 to 4. A: No change B: Slightly separated C: Completely separated

[0051] As shown in Tables 1 to 3, the compositions of the examples all maintained a stable emulsified state even after standing for one month at 50° C., without separation into the aqueous and oily phases. On the other hand, the compositions of the comparative examples all showed separation into the aqueous and oily phases, and did not maintain a stable emulsified state (see Table 4).

[0052] [Table 1]

[0053] [Table 2]

[0054] [Table 3]

[0055] [Table 4]

Claims

1. (a) at least one plant-derived component selected from the group consisting of Tororo Aoi Modoki extract, Foliota Microspora polysaccharides, and Quince Seed extract; (b) niosomes comprising at least one non-ionic surfactant; (c) a thickener different from component (a); (d) oils, and (e) Aqueous medium An oil-in-water emulsion comprising:

2. 2. The oil-in-water emulsion according to claim 1, wherein the nonionic surfactant contained in component (b) is a polyglycerol fatty acid ester.

3. 3. The oil-in-water emulsion according to claim 1, wherein the component (c) comprises at least one selected from the group consisting of a (meth)acrylic polymer and a polysaccharide different from the polysaccharide contained in the component (a).

4. The oil-in-water emulsion according to any one of claims 1 to 3, wherein component (d) comprises a vegetable oil.

5. The oil-in-water emulsion according to any one of claims 1 to 4, further comprising an electrolyte.

6. The oil-in-water emulsion according to any one of claims 1 to 5, which is silicone-free.

7. 7. The oil-in-water emulsion according to claim 1, wherein the content of component (a) is 0.5 to 30% by mass, preferably 0.8 to 28% by mass, and more preferably 1 to 25% by mass, based on the total amount of the oil-in-water emulsion.

8. The oil-in-water emulsion according to any one of claims 1 to 7, wherein the content of component (b) is 0.1 to 5 mass%, preferably 0.3 to 4.5 mass%, and more preferably 0.5 to 4 mass%, based on the total amount of the oil-in-water emulsion.

9. The oil-in-water emulsion according to any one of claims 1 to 8, wherein the content of component (c) is 0.1 to 3 mass%, preferably 0.15 to 2.8 mass%, and more preferably 0.2 to 2.5 mass%, based on the total amount of the oil-in-water emulsion.

10. The oil-in-water emulsion according to any one of claims 1 to 9, which is in the form of a lotion, a milky lotion, a beauty serum, a makeup remover, a makeup base, a foundation, or a concealer.

11. A cosmetic method for caring for and / or making up keratinous materials, in particular skin, which comprises applying an oil-in-water emulsion according to any one of claims 1 to 10 to keratinous materials, in particular skin.

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