Emulsified cosmetics

Abstract

To provide an emulsified cosmetic that provides a moderate hardness, is non-sticky on the skin after application, and leaves it lustrous.SOLUTION: Provided is an emulsified cosmetic comprising the following components (A), (B), (C), (D), and (E): (A) an ionic surfactant, (B) a nonionic surfactant, (C) 50 to 75 mass% of a polyol, (D) a triester oil that is liquid at 25°C, and (E) water.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an emulsion cosmetic. [Background technology]

[0002] Conventionally, cosmetics containing high concentrations of polyols and having a high moisturizing effect have been used to provide moisture to skin that is unwell due to dryness. For example, Patent Document 1 describes that a cosmetic containing 50 to 95 mass% of an alcohol having 16 to 22 carbon atoms, a nonionic surfactant, and a polyhydric alcohol provides a warming effect when applied to the skin. Patent Document 2 describes that a gel sheet for application to the skin containing alginic acid or the like, an oil agent, and 40 to 90 mass % of a polyhydric alcohol maintains moisture retention over time. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-7980 [Patent Document 2] Japanese Patent Publication No. 2022-147108 Summary of the Invention [Problem to be solved by the invention]

[0004] While conventional cosmetics provide moisturizing effects, they have the problem of leaving the skin sticky after application. Also, sheet-type products can be difficult to fit depending on the skin structure. [Means for solving the problem]

[0005] The present inventors have discovered that by using a combination of a high concentration of polyol, an ionic surfactant, a nonionic surfactant, and a liquid triester oil, it is possible to obtain an emulsified cosmetic that has an appropriate hardness, adheres well to the skin, provides a high moisturizing sensation, and is not sticky after application, while also imparting a glossy finish to the skin.

[0006] The present invention relates to a composition comprising the following components (A), (B), (C), (D) and (E): (A) an ionic surfactant, (B) a nonionic surfactant, (C) 50 to 75 mass% of polyol, (D) Triester oil that is liquid at 25°C, (E)Water The present invention relates to an emulsion cosmetic containing the above. [Effects of the Invention]

[0007] The emulsified cosmetic of the present invention has an appropriate hardness, is non-sticky on the skin after application, and can impart a glossy finish. DETAILED DESCRIPTION OF THE INVENTION

[0008] The ionic surfactant of component (A) used in the present invention is one that is commonly used in cosmetics, and anionic surfactants and cationic surfactants are preferred. Examples of anionic surfactants include N-acylamino acids such as N-acyl glutamic acids such as N-lauroyl-L-glutamic acid, N-stearoyl-L-glutamic acid, and N-myristoyl-L-glutamic acid; fatty acids; alkyl ether carboxylic acids; polyoxyethylene alkyl ether carboxylic acids; acyl lactic acid; N-acyl methyl alanine; N-acyl sarcosine; diacyl amino acids; and salts thereof; alkane sulfonic acids; α-olefin sulfonic acids; α-sulfofatty acid methyl esters; acyl isethionates; alkyl hydroxybenzoates; sulfonate types such as N-acylmethyltaurines such as N-myristoyl-N-methyltaurine, N-lauroyl-N-methyltaurine, and N-stearoyl-N-methyltaurine, and salts thereof; sulfate types such as alkyl sulfate esters, polyoxyethylene alkyl sulfate esters, alkyl ether sulfates, polyoxyethylene alkyl ether sulfates, fatty acid alkanolamide sulfate esters, and salts thereof; and phosphate types such as alkyl phosphate esters, polyoxyethylene alkyl ether phosphates, and salts thereof.

[0009] From the viewpoints of obtaining a suitable hardness, reducing stickiness on the skin after application, and improving the luster of the skin after application, the anionic surfactant preferably contains one or more selected from N-acylamino acids, N-acylmethyltaurines, and salts thereof, more preferably contains one or more selected from N-acylamino acids, N-stearoyl-N-methyltaurines, and salts thereof, even more preferably contains one or more selected from N-stearoyl-L-glutamic acid, N-stearoyl-N-methyltaurines, and salts thereof, and even more preferably contains N-stearoyl-L-glutamic acid or a salt thereof.

[0010] Examples of salt structures constituting anionic surfactants include alkali metal salts such as sodium and potassium, basic amino acid salts such as L-arginine, L-histidine, and L-lysine, and alkanolamine salts such as triethanolamine, with alkali metal salts being preferred and sodium salts being more preferred.

[0011] Examples of cationic surfactants include monoalkyltrimethylammonium salts such as octyltrimethylammonium chloride, decyltrimethylammonium chloride, lauryltrimethylammonium chloride, tetradecyltrimethylammonium chloride, hexadecyltrimethylammonium chloride, hexadecyltrimethylammonium bromide, stearyltrimethylammonium chloride, and behenyltrimethylammonium chloride; dialkyldimethylammonium salts such as didecyldimethylammonium chloride and distearyldimethylammonium chloride; and trialkylmethylammonium salts. Among these, from the viewpoints of obtaining a suitable hardness, reducing stickiness on the skin after application, and improving the skin's luster after application, it is preferable to contain one or more selected from monoalkyltrimethylammonium salts and dialkyldimethylammonium salts, and it is more preferable to contain dialkyldimethylammonium salts.Furthermore, it is preferable to contain one or more selected from behenyltrimethylammonium chloride and distearyldimethylammonium chloride, and it is more preferable to contain distearyldimethylammonium chloride.Incidentally, distearyldimethylammonium chloride is also referred to as distearyldimonium chloride.

[0012] From the viewpoints of obtaining a suitable hardness, reducing stickiness on the skin after application, and improving the skin's luster after application, component (A) preferably contains an anionic surfactant, more preferably contains one or more selected from N-acylamino acids, N-acylmethyltaurines, and salts thereof, even more preferably contains one or more selected from sodium N-stearoyl-L-glutamate and sodium N-stearoyl-N-methyltaurine, and even more preferably contains sodium N-stearoyl-L-glutamate.

[0013] The ionic surfactants of component (A) can be used alone or in combination of two or more, and the content is preferably 0.05 to 2 mass % of the total composition, more preferably 0.1 to 1.4 mass %, and even more preferably 0.4 to 0.8 mass %, from the viewpoints of reducing stickiness on the skin after application and obtaining an appropriate hardness. The content of component (A) indicates the content of the salt form.

[0014] Component (B) is a nonionic surfactant, and those used in ordinary cosmetics can be used. Specific examples include polyglycerin fatty acid esters, glycerin fatty acid esters, propylene glycol fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, polyethylene glycol fatty acid esters, alkyl glyceryl ethers, alkyl polyglyceryl ethers, polyoxyethylene alkyl ethers, polyoxyethylene alkyl ether fatty acid esters, polyoxyethylene alkylamines, and silicone surfactants.

[0015] Examples of polyglycerol fatty acid esters include decaglycerol fatty acid esters such as polyglyceryl-10 diisostearate, polyglyceryl-10 isostearate, polyglyceryl-10 oleate, and polyglyceryl-10 dioleate; and diglycerol fatty acid esters such as polyglyceryl-2 stearate. From the viewpoints of achieving appropriate hardness, reducing stickiness on the skin after application, and improving the luster of the skin after application, it is preferable to include one or more selected from polyglyceryl-10 diisostearate and polyglyceryl-10 oleate, and it is more preferable to include polyglyceryl-10 oleate. Examples of glycerin fatty acid esters include lipophilic glyceryl monostearate, lipophilic glyceryl monooleate, self-emulsifying glyceryl monostearate, coconut oil fatty acid glyceryl, glyceryl laurate, glyceryl myristate, glyceryl isostearate, glyceryl monohydroxystearate, glyceryl oleate, glyceryl linoleate, glyceryl ricinoleate, glyceryl erucate, glyceryl behenate, hydrogenated soybean fatty acid glyceryl, and monoisostearate. Examples of suitable surfactants include glyceryl monomyristate, glyceryl monolanolinate, glyceryl sesquioleate, glyceryl distearate, and glyceryl diarachate. From the viewpoints of obtaining a suitable hardness, reducing stickiness on the skin after application, and improving the luster of the skin after application, it is preferable to include one or more surfactants selected from lipophilic glyceryl monostearate, lipophilic glyceryl monooleate, and self-emulsifying glyceryl monostearate, and it is more preferable to include self-emulsifying glyceryl monostearate.

[0016] From the viewpoints of obtaining a suitable hardness, reducing stickiness on the skin after application, and improving the luster of the skin after application, component (B) preferably contains one or more selected from polyglycerin fatty acid esters and glycerin fatty acid esters, more preferably contains glycerin fatty acid esters, even more preferably contains one or more selected from lipophilic glyceryl monostearate, lipophilic glyceryl monooleate, and self-emulsifying glyceryl monostearate, and even more preferably contains self-emulsifying glyceryl monostearate.

[0017] Furthermore, the nonionic surfactant of component (B) preferably has an HLB value of 3 to 16, more preferably 5 to 14, and even more preferably 7 to 12, from the viewpoints of obtaining an appropriate hardness, reducing stickiness on the skin after application, and improving the skin's luster after application. Here, HLB (Hydrophilic-Lipophilic Balance) indicates the molecular weight of the hydrophilic group portion relative to the total molecular weight of the surfactant, and is calculated using Griffin's equation. Furthermore, when a surfactant is composed of two or more nonionic surfactants, the HLB of the mixed surfactant is calculated as follows: The HLB of the mixed surfactant is the arithmetic average of the HLB values ​​of each nonionic surfactant based on their blending ratio. Mixed HLB=Σ(HLBx×Wx) / ΣWx HLBx indicates the HLB value of nonionic surfactant X. Wx represents the mass (g) of the nonionic surfactant X having the value of HLBx.

[0018] The nonionic surfactants of component (B) can be used alone or in combination of two or more. From the viewpoint of achieving a non-sticky feeling and an appropriate hardness, the content is preferably 0.05 to 4 mass % of the total composition, more preferably 0.8 to 3.4 mass %, even more preferably 1 to 3 mass %, and even more preferably 1.8 to 2.2 mass %.

[0019] In the present invention, the mass ratio (A) / (B) of component (A) to component (B) is preferably 0.05 to 1, more preferably 0.08 to 0.7, even more preferably 0.17 to 0.45, and even more preferably 0.26 to 0.35, from the viewpoints of obtaining an appropriate hardness, reducing stickiness on the skin after application, and improving the skin's luster after application.

[0020] The polyol of component (C) is a compound having two or more hydroxyl groups in the molecule, and may be any of those commonly used in cosmetics. Examples of dihydric alcohols include polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, 1,3-butylene glycol, 1,3-propanediol, and pentanediol. Examples of trihydric alcohols include glycerin and trimethylolpropane. Examples of tetrahydric alcohols include diglycerin and erythritol. Examples of pentahydric or higher polyhydric alcohols include polyglycerins such as triglycerin; sugars and sugar alcohols such as glucose, maltose, maltose, sucrose, xylitol, sorbitol, malbitol, polyoxyethylene methyl glucoside, polyoxyethylene ethyl glucoside, and polyoxyethylene propylene glucoside.

[0021] From the viewpoints of obtaining a suitable hardness, reducing stickiness on the skin after application, and improving the luster of the skin after application, the polyol of component (C) preferably contains one or more selected from dihydric alcohols, trihydric alcohols, tetrahydric alcohols, and pentahydric alcohols, more preferably one or more selected from polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, 1,3-butylene glycol, 1,3-propanediol, glycerin, diglycerin, and polyglycerin, even more preferably one or more selected from polyethylene glycol, glycerin, and diglycerin, and even more preferably glycerin.

[0022] Component (C) can be used alone or in combination of two or more types, and the content is 50 to 75 mass % of the total composition, preferably 55 to 72 mass %, and more preferably 63 to 67 mass %, from the viewpoint of reducing stickiness on the skin after application and obtaining appropriate hardness.

[0023] Component (D) is a triester oil that is liquid at 25°C. "Liquid" means that it has fluidity and includes a paste state. Note that component (D) does not contain the nonionic surfactant of component (B). As component (D), triglyceride oils are preferred, such as caprylic / capric triglyceride, glyceryl tri-2-ethylhexanoate, glyceryl trimyristate, glyceryl triisopalmitate, glyceryl trioleate, glyceryl triisostearate, glyceryl tripalmitate / stearate, and glyceryl trioleate / linoleate; and vegetable oils such as olive oil, jojoba oil, macadamia nut oil, meadowfoam oil, castor oil, safflower oil, sunflower oil, avocado oil, canola oil, apricot kernel oil, rice germ oil, rice bran oil, and evening primrose oil.

[0024] From the viewpoints of obtaining a suitable hardness, reducing stickiness on the skin after application, and improving the luster of the skin after application, component (D) preferably contains one or more selected from caprylic / capric triglyceride, glyceryl tri-2-ethylhexanoate, glyceryl triisostearate, olive oil, jojoba oil, macadamia nut oil, and meadowfoam oil, more preferably one or more selected from caprylic / capric triglyceride and glyceryl triisostearate, and even more preferably glyceryl triisostearate.

[0025] Component (D) can be used alone or in combination of two or more. From the viewpoint of reducing stickiness on the skin after application and improving the skin's luster after application, the content is preferably 0.5 to 10 mass %, more preferably 1 to 8 mass %, and even more preferably 3 to 5 mass % of the total composition.

[0026] In the present invention, the mass ratio (A) / (D) of component (A) to component (D) is preferably 0.02 to 0.8, more preferably 0.03 to 0.5, even more preferably 0.07 to 0.28, and even more preferably 0.12 to 0.2, from the viewpoints of obtaining an appropriate hardness, reducing stickiness on the skin after application, and improving the skin's luster after application.

[0027] In the present invention, the mass ratio (C) / (D) of component (C) to component (D) is preferably 6 to 40, more preferably 8 to 35, even more preferably 13 to 25, and even more preferably 15.5 to 17, from the viewpoints of obtaining an appropriate hardness, reducing stickiness on the skin after application, and improving the luster of the skin after application.

[0028] In the present invention, the content of water as component (E) is preferably 10 to 25 mass % of the total composition, more preferably 12 to 23 mass %, and even more preferably 15 to 20 mass %, from the viewpoints of obtaining an appropriate hardness, reducing stickiness on the skin after application, and improving the skin's luster after application.

[0029] The emulsion cosmetic of the present invention may further contain a higher alcohol, which can provide an appropriate hardness. Examples of higher alcohols include those commonly used in cosmetics, such as aliphatic monohydric alcohols having 12 to 22 carbon atoms, such as lauryl alcohol, cetyl alcohol, myristyl alcohol, oleyl alcohol, stearyl alcohol, isostearyl alcohol, 2-octyldodecanol, behenyl alcohol, and cetostearyl alcohol. Among these, from the viewpoints of obtaining a suitable hardness, reducing stickiness on the skin after application, and improving the skin's luster after application, it is preferable to contain a linear saturated alcohol having 14 to 18 carbon atoms, and more preferably a linear saturated alcohol having 16 to 18 carbon atoms. It is also preferable to contain cetostearyl alcohol.

[0030] The higher alcohols can be used alone or in combination of two or more. From the viewpoints of obtaining a suitable hardness, reducing stickiness on the skin after application, and improving the skin's luster after application, the content is preferably 0.5 to 4 mass %, more preferably 1 to 3.5 mass %, and even more preferably 2 to 3 mass % of the total composition.

[0031] The emulsion cosmetic of the present invention may further contain an oil other than component (D) that is liquid at 25° C. Liquid means having fluidity, and includes paste-like forms. The oil agent that is liquid at 25°C may be any oil agent that is commonly used in cosmetics, such as hydrocarbon oil, ester oil, ether oil, silicone oil, etc.

[0032] More specifically, examples of hydrocarbon oils include linear or branched hydrocarbon oils such as α-olefin oligomer, squalane, vegetable squalane, liquid paraffin, liquid isoparaffin, polybutene, hydrogenated polyisobutene, hydrogenated polydecene, and petrolatum. From the viewpoints of obtaining appropriate hardness and improving the luster of the skin after application, it is preferable to contain α-olefin oligomer.

[0033] Ester oils include monoester oils, diester oils and tetraester oils. Examples of monoester oils include monoesters of aliphatic or aromatic monocarboxylic or dicarboxylic acids having 2 to 24 carbon atoms, and specific examples include cetyl 2-ethylhexanoate, cetyl octanoate, isononyl isononanoate, isotridecyl isononanoate, hexyl laurate, isopropyl myristate, octyldodecyl myristate, 2-hexyldecyl myristate, isopropyl palmitate, octyl palmitate, isocetyl stearate, isocetyl isostearate, octyl methoxycinnamate, and alkyl benzoates (C12 to C15).

[0034] Examples of diester oils include diesters of dicarboxylic acids having 3 to 18 carbon atoms, and difatty acid esters of polyhydric alcohols, and specific examples include propylene glycol dicaprylate and neopentyl glycol dicaprate.

[0035] Examples of tetraester oils include tetra-fatty acid esters of tetrahydric or higher polyhydric alcohols, and specific examples include pentaerythritol tetra(behenate / benzoate / ethylhexanoate), pentaerythritol tetraethylhexanoate, pentaerythritol tetraoctanoate, and pentaerythritol tetra-2-ethylhexanoate.

[0036] The ether oils include dialkyl ethers, and specific examples thereof include dihexyl ether, dicaprylyl ether, and cetyl-1,3-dimethylbutyl ether.

[0037] Examples of silicone oils include volatile and non-volatile linear dimethylpolysiloxanes such as dimethylpolysiloxane (1cs), dimethylpolysiloxane (1.5cs), dimethylpolysiloxane (2cs), dimethylpolysiloxane (6cs), and dimethylpolysiloxane (50cs); branched siloxanes such as methyltrimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane; and cyclic dimethylsiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. From the viewpoint of obtaining an appropriate hardness, the silicone oil preferably contains one or more selected from linear dimethylpolysiloxanes and branched siloxanes, more preferably contains linear dimethylpolysiloxane, even more preferably contains non-volatile linear dimethylpolysiloxane, and even more preferably contains dimethylpolysiloxane (6cs).

[0038] The oil agents that are liquid at 25°C can be used alone or in combination of two or more. From the viewpoints of obtaining an appropriate hardness, reducing stickiness on the skin after application, and improving the luster of the skin after application, the content is preferably 0.5 to 10 mass %, more preferably 1 to 8 mass %, and even more preferably 3 to 6 mass % of the total composition.

[0039] In addition to the above-mentioned components, the emulsion cosmetic of the present invention may contain components that are commonly used in cosmetics, such as oily components other than those mentioned above, powders, ultraviolet protection agents, polymeric compounds, antioxidants, fragrances, preservatives, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, disinfectants, skin activators, moisturizers other than component (C), refreshing agents, whitening agents, anti-wrinkle agents, anti-inflammatory agents, etc.

[0040] The emulsified cosmetic of the present invention can be produced by a conventional method. For example, the composition can be produced by heating and mixing components (A), (B), (C), (D), (E) and other components, followed by cooling. The emulsion cosmetic of the present invention can be in the form of a liquid, emulsion, paste, cream, gel, solid, etc. Paste, cream, and gel cosmetic preparations are preferred, with gel being more preferred.

[0041] From the viewpoint of ensuring close contact with the skin and facilitating dispensing from a container such as a tube or jar, the hardness of the emulsion cosmetic of the present invention at 30°C is preferably 5 to 25 g, more preferably 8 to 19 g, and even more preferably 10 to 15 g. In the present invention, the hardness is measured using a hardness meter CurdmeterMAX ME-500 (manufactured by Asuka Instruments Co., Ltd.) with a pressure-sensitive shaft of 10φ, and is expressed as a load (g) value.

[0042] The emulsified cosmetic of the present invention can be used as a skin care cosmetic such as a skin care emulsion, a skin care cream, a BB cream, or a beauty serum. The emulsion cosmetic of the present invention can be applied to the skin after washing the face and blended into the skin for use. Then, normal skin care such as the use of a lotion or the like can be performed. The emulsion cosmetic of the present invention can also be applied to the skin after washing the face and then washed off or wiped off after a certain period of time. It can also be applied to the skin after the application of a lotion, emulsion, or the like. [Example]

[0043] Examples 1 to 9 and Comparative Examples 1 to 4 Emulsion cosmetics having the compositions shown in Table 1 were prepared, and the hardness was measured, and the non-stickiness of the skin after application and the gloss of the skin after application were evaluated. The results are also shown in Table 1.

[0044] (Manufacturing method) Components (A), (B), (C), (D), (E) and other components were mixed under heating at 80°C or higher, and after dissolution was confirmed, the mixture was cooled to 40°C to obtain an emulsion cosmetic.

[0045] (Evaluation method) (1)Hardness: Each emulsion cosmetic was stored at 30°C and measured using a hardness tester CurdmeterMAX ME-500 (manufactured by Asuka Instruments Co., Ltd.) with a pressure-sensitive shaft of 10φ, and the load (g) value was evaluated.

[0046] (2) No stickiness on the skin after application: Three expert evaluators applied 0.1g of each emulsion cosmetic to the back of their hand, spread it, and then touched their skin immediately afterwards to perform a sensory evaluation of the lack of stickiness according to the following criteria. The results are shown as the total score of the three evaluators. "Non-sticky" means that when you touch your skin with your fingers after application, there is no sticky feeling and your fingers can move smoothly. 5: Not obviously sticky. 4;No stickiness. 3. Not very sticky. 2: Slightly sticky. 1: Sticky.

[0047] (3) Skin glow after application: 32 μL of each emulsion cosmetic was applied to an area of ​​2.5 cm x 6 cm of artificial leather (Saplar), and after drying for 10 minutes, the surface reflected light was measured using SAMBA Hair (Bossa Nova Technologies) and the Shine Max value (specular reflection) was evaluated. The larger this value, the higher the reflectivity and the glossier the surface.

[0048] [Table 1]

[0049] *1 Sodium N-stearoyl-L-glutamate: Amisoft HS-11P (manufactured by Ajinomoto Co., Inc.), *2 Self-emulsifying glyceryl monostearate: Nikkol MGS-BSEV (Nippon Surfactan Kogyo Co., Ltd., HLB8), *3 Concentrated glycerin: RG·Co·K (Non-Oil) (NOF Corporation) *4 Glyceryl triisostearate: TISG (manufactured by Kokyu Alcohol Kogyo Co., Ltd.), *5 Cetostearyl alcohol: Kalcol 6850 (Kao Corporation), *6 α-olefin oligomer: SILKFLO 364 NF (Vantage Specialty Chemicals), *7 Methylpolysiloxane: KF-96A-6CS(-G) (Shin-Etsu Chemical Co., Ltd.)

[0050] Prescription example 1 The emulsion cosmetics having the compositions shown in Table 2 were produced in the same manner as in Examples 1 to 9. The hardness was 12.9 g, and the cosmetics did not leave the skin sticky after application and gave it a glossy finish.

[0051] [Table 2]

Claims

1. The following components (A), (B), (C), (D), and (E): (A) an ionic surfactant, (B) a nonionic surfactant, (C) 50 to 75% by mass of polyol, (D) a triester oil that is liquid at 25°C; (E) Water An emulsion cosmetic containing

2. 2. The emulsion cosmetic according to claim 1, wherein the mass ratio (A) / (B) of component (A) to component (B) is 0.05 to 1.

3. 3. The emulsion cosmetic according to claim 1, wherein the mass ratio (A) / (D) of component (A) to component (D) is 0.02 to 0.

8.

4. 3. The emulsified cosmetic according to claim 1, wherein the mass ratio (C) / (D) of component (C) to component (D) is 6 to 40.

5. The emulsion cosmetic according to claim 1 or 2, wherein component (A) comprises one or more members selected from the group consisting of N-acylamino acids, N-acylmethyltaurines, and salts thereof.

6. 3. The emulsion cosmetic according to claim 1, wherein component (B) comprises a glycerin fatty acid ester.

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