JP2017119640A - Oil-in-water emulsion cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide oil-in-water emulsion cosmetics comprising meadowfoam oil having uniform oil droplet particles with a small average particle diameter and a narrow particle size distribution width.SOLUTION: The oil-in-water emulsion cosmetic comprise (A) component: meadowfoam oil, (B) component: N-acylglutamic acid and/or salt thereof, (C) component: water-soluble sucrose fatty acid ester, and (D) component: glycerol mono fatty acid ester.SELECTED DRAWING: None

Description

  The present invention relates to an oil-in-water emulsified cosmetic.

  An oil-in-water (O / W) emulsion composition in which the continuous phase is an aqueous phase is widely used as a cream or lotion because it has a good feeling when used as an external composition such as cosmetics. (For example, the following patent documents 1-3 etc.).

  It is known that the stability of oil-in-water emulsified cosmetics is affected by the particle size of the oil droplet particles, the repulsive force between the oil droplet particles, and the viscosity of the continuous phase. For example, when the particle size of the oil droplet particles is large, the oil layer and the aqueous phase are separated over time, so a high-pressure emulsifier such as a homogenizer or nanomizer is used to increase the stability of the composition. For example, the particle diameter of oil droplet particles is reduced by a technique, a D phase emulsification method, or the like (see, for example, Patent Documents 4 and 5).

JP 2014-114230 A Japanese Patent Laying-Open No. 2015-059114 JP 2013-006790 A JP 2006-089420 A JP 2007-289074 A

  The inventors of the present invention have conducted intensive research to develop an oil-in-water emulsified cosmetic containing a meadow foam oil that is less sticky and has a moisturizing and emollient feeling. When sugar fatty acid esters and glycerin monofatty acid esters are used, the oil droplet particles have a large particle size and a large particle size distribution width, resulting in the formation of uneven oil droplet particles.

  The present invention has been made in order to solve the above-mentioned problems, and is an oil-in-water containing a meadow foam oil having uniform oil droplet particles having a small average particle diameter and a small particle size distribution width. It aims at providing a type emulsified cosmetic.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have surprisingly found that N-acylglutamic acid and / or surfactant as a surfactant in addition to water-soluble sucrose fatty acid ester and glycerin monofatty acid ester. It has been found that when the salt is used, an oil-in-water emulsified cosmetic having uniform oil droplet particles having a small average particle diameter of oil droplet particles and a small particle size distribution width can be prepared. Based on this finding, the present inventors have completed the present invention by further research.

That is, the present invention typically includes the subject matters described in the following sections.
Item 1.
(A) component: Meadow foam oil,
(B) component: N-acyl glutamic acid and / or salt thereof,
(C) Component: Water-soluble sucrose fatty acid ester, and (D) component: Oil-in-water type emulsified cosmetic containing glycerol mono fatty acid ester.
Item 2.
Item 2. The oil-in-water emulsified cosmetic according to Item 1, comprising 1 to 20% by mass of the component (A) based on the total amount of the composition.
Item 3.
Item 3. The oil-in-water emulsified cosmetic according to Item 1 or 2, comprising 0.05 to 0.5% by mass of the component (B) based on the total amount of the composition.
Item 4.
Furthermore, (E) component: The oil-in-water type emulsion cosmetic in any one of said claim | item 1-3 containing higher alcohol.
Item 5.
The oil-in-water emulsion cosmetic according to any one of Items 1 to 4, further comprising (F) component: hydrogenated lecithin.
Item 6.
Item 6. The oil-in-water emulsified cosmetic according to any one of Items 1 to 5, wherein the average particle size of the oil droplets is 1.0 to 2.0 µm.
Item 7.
Item 7. The oil-in-water emulsified cosmetic according to any one of Items 1 to 6, wherein the standard deviation of the particle size distribution of the oil droplets is 0.20 or less.

  The oil-in-water emulsified cosmetic of the present invention has uniform oil droplet particles in which the particle size of the oil droplet particles is small and the particle size distribution width is small. Therefore, the oil-in-water emulsified cosmetic of the present invention exhibits high temporal stability.

It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsion cosmetics of Example 1. FIG. It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsion cosmetics of Example 2. FIG. It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsion cosmetics of Example 3. It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsion cosmetics of Example 4. It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsified cosmetics of Example 5. It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsion cosmetics of Example 6. It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsified cosmetics of Example 7. It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsified cosmetics of Example 8. It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsion cosmetics of Example 9. It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsified cosmetics of Example 10. It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsion cosmetics of the comparative example 1. It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsion cosmetics of the comparative example 2. It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsion cosmetics of the comparative example 3. It is a figure which shows the analysis result of the particle size distribution of the oil-in-water type emulsion cosmetics of the comparative example 4.

  Hereinafter, the present invention will be described in detail.

The oil-in-water emulsified cosmetic of the present invention is
(A) component: Meadow foam oil,
(B) component: N-acyl glutamic acid and / or salt thereof,
(C) component: water-soluble sucrose fatty acid ester and (D) component: glycerol mono fatty acid ester are included.

  The (A) component Meadowfoam oil is a fatty oil obtained from the seeds of Meadowfoam (Limnanthaceae alba).

 The content of the component (A) in the oil-in-water emulsified cosmetic of the present invention is not particularly limited as long as the moisturizing feeling and emollient feeling of the meadow foam are exhibited. For example, based on the total amount of the composition 1 to 20% by mass, preferably about 2.5 to 17.5% by mass, more preferably about 5 to 17.5% by mass.

  The (B) component N-acyl glutamic acid is a glutamic acid derivative having a structure in which the amino group of glutamic acid is substituted with an acyl group, and the N-acyl glutamic acid salt is a salt of the glutamic acid derivative. The acyl group in N-acyl glutamic acid is not particularly limited, and is preferably an acyl group derived from a saturated or unsaturated linear or branched fatty acid having 8 to 24 carbon atoms, and having 8 to 24 carbon atoms. More preferably, it is an acyl group derived from a saturated linear or branched fatty acid, more preferably an acyl group derived from a saturated linear fatty acid having 8 to 24 carbon atoms, and 12 to 12 carbon atoms. Particularly preferred is an acyl group derived from 24 saturated straight chain or higher fatty acids. Examples of such an acyl group include a capryloyl group, a pelargoyl group, a lauroyl group, a myristoyl group, a palmitoyl group, a stearoyl group, an isostearoyl group, and an oleoyl group. Examples of the salt of N-acyl glutamic acid include sodium salts of N-acyl glutamic acid, alkali metal salts such as disodium salt and potassium salt; metal salts such as aluminum salt; amine salts such as triethanolamine salt and the like. .

  Specific examples of the component (B) include N-lauroyl-L-glutamic acid, N-lauroyl-L-glutamic acid Na, N-lauroyl-L-glutamic acid 2Na, N-lauroyl-L-glutamic acid K, N-lauroyl-L. -TEA glutamate, N-myristoyl-L-glutamic acid, N-myristoyl-L-glutamic acid Na, N-myristoyl-L-glutamic acid K, N-stearoyl-L-glutamic acid, N-stearoyl-L-glutamic acid Na, N-stearoyl Examples include -L-glutamic acid 2Na, N-stearoyl-L-glutamic acid K, N-stearoyl-L-glutamic acid Al, and the like. Among these, N-lauroyl-L-glutamate Na and N-stearoyl-L-glutamate Na are preferable from the viewpoint of availability and cost.

  The content of the component (B) in the oil-in-water emulsified cosmetic of the present invention is not particularly limited as long as the effects of the present invention are exhibited. For example, 0.01 to About 0.5 mass%, Preferably it is about 0.05-0.4 mass%, More preferably, it is about 0.1-0.3 mass%.

  The component (B) in the oil-in-water emulsion cosmetic of the present invention may be used alone or in combination of two or more of the substances included in the component (B). Good. When two or more types are used in combination, the mixing ratio of each substance is not particularly limited and can be set as appropriate.

  The water-soluble sucrose fatty acid ester as component (C) is an ester having a structure in which a fatty acid is ester-bonded to a hydroxyl group of sucrose (sucrose). In addition, sucrose fatty acid esters exist from monoesters to octaesters depending on the number of fatty acid residues ester-bonded to the eight hydroxyl groups present in sucrose. The water-soluble sucrose fatty acid ester as component (C) is not particularly limited as long as it is water-soluble, and examples thereof include sucrose mono-fatty acid ester, sucrose di-fatty acid ester, and sucrose tri-fatty acid ester. It is done. Of these, sucrose monofatty acid esters are preferred. In addition, the water-soluble sucrose fatty acid ester (C) includes sucrose mono-fatty acid ester, sucrose di-fatty acid ester, sucrose tri-fatty acid ester, sucrose tetra-fatty acid ester, sucrose penta-fatty acid ester, sucrose hexa It may be a mixture containing at least one selected from the group consisting of fatty acid esters, sucrose hepta fatty acid esters, and sucrose octa fatty acid esters. The content of the sucrose monofatty acid ester in the mixture is not particularly limited as long as water solubility is exhibited, and is, for example, 40% by mass or more, preferably 50% by mass or more, more preferably 60% by mass. As described above, it is particularly preferably 70% by mass or more.

  It does not specifically limit as a fatty acid in water-soluble sucrose fatty acid ester, It is preferable that it is a C8-C24 saturated or unsaturated linear or branched fatty acid, and a C8-C24 saturated fatty acid. It is more preferably a linear or branched fatty acid, more preferably a saturated linear fatty acid having 8 to 24 carbon atoms, and a saturated linear fatty acid having 12 to 24 carbon atoms. It is particularly preferred. Examples of such fatty acids include caprylic acid, pelargonic acid, lauric acid, myristic acid, palmitic acid, stearic acid, erucic acid, behenic acid, isostearic acid group, and oleic acid.

  Specific examples of sucrose fatty acid esters include sucrose monolaurate, sucrose dilaurate, sucrose polylaurate, sucrose monostearate, sucrose distearate, sucrose tristearate, sucrose polystearate, sucrose monopalmitate, sucrose dipalmitate Sucrose tripalmitate, sucrose hexapalmitate, sucrose pentaerucate, sucrose hexaerucate, sucrose tribehenate, and the like. Among these, sucrose monostearate and sucrose monopalmitate are preferable. As a specific example of the water-soluble sucrose fatty acid ester as component (C), sucrose monostearate or sucrose monopalmitate is 40% by mass or more, preferably 50% by mass or more, more preferably 60% by mass or more, and particularly preferably Is a mixture containing 70% by mass or more.

  The content of the component (C) in the oil-in-water emulsified cosmetic of the present invention is not particularly limited as long as the effect of the present invention is exerted. For example, 0.1 to 0.1% based on the total amount of the composition. About 1.0 mass%, Preferably it is about 0.2-0.9 mass%, More preferably, it is about 0.3-0.8 mass%.

  The component (C) in the oil-in-water emulsion cosmetic of the present invention may be used alone or in combination of two or more of the substances included in the component (C). Good. When two or more types are used in combination, the mixing ratio of each substance is not particularly limited and can be set as appropriate.

  (D) The glycerol mono fatty acid ester which is a component is a monoester of glycerol and a fatty acid. The fatty acid in the glycerin monofatty acid ester is not particularly limited, and is preferably a saturated or unsaturated linear or branched fatty acid having 8 to 24 carbon atoms, and saturated or unsaturated having 12 to 24 carbon atoms. The linear or branched fatty acid is more preferable. Examples of such fatty acids include caprylic acid, pelargonic acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, linoleic acid, arachidonic acid, oleic acid, and the like.

  Specific examples of the component (D) include sucrose monolaurate (glyceryl laurate), glyceryl monocaprylate (glyceryl caprylate), glyceryl monocaprate (glyceryl caprate), glyceryl monomyristate (glyceryl myristate), mono Glycerol palmitate (glyceryl palmitate), glyceryl monostearate (glyceryl stearate), glyceryl monoisostearate (glyceryl isostearate), glyceryl monolinoleate (glyceryl linoleate), glyceryl monoarachidonic acid (glyceryl arachidonic acid), mono And glyceryl oleate (glyceryl oleate). Among these, glyceryl stearate and glyceryl oleate are preferable.

  The content of the component (D) in the oil-in-water emulsified cosmetic of the present invention is not particularly limited as long as the effect of the present invention is exerted. For example, 0.1 to 0.1% based on the total amount of the composition. It is about 3.0 mass%, Preferably it is about 0.5-2.5 mass%, More preferably, it is about 0.5-2.0 mass%.

  Moreover, as (D) component in the oil-in-water type emulsion cosmetics of this invention, you may use individually by 1 type among the substances included by above-mentioned (D) component, and it uses it in combination of 2 or more types. May be. When two or more types are used in combination, the mixing ratio of each substance is not particularly limited and can be set as appropriate.

  Furthermore, the oil-in-water emulsified cosmetic of the present invention preferably contains (E) component: higher alcohol. In the present specification, the higher alcohol means an alcohol having 16 to 24 carbon atoms in the molecule. Among the higher alcohols, alcohols having 18 to 24 carbon atoms in the molecule are preferable.

  Specific examples of the component (E) include cetyl alcohol, isocetyl alcohol, stearyl alcohol, isostearyl alcohol, and behenyl alcohol. Among these, behenyl alcohol is preferable.

  The content of the component (E) in the oil-in-water emulsified cosmetic of the present invention is not particularly limited, and is, for example, about 0.1 to 2.0% by mass, preferably 0.1 to 0.1% based on the total amount of the composition. About 1.5 mass%, More preferably, it is about 0.1-1.0 mass%.

  The component (E) in the oil-in-water emulsified cosmetic of the present invention may be used alone or in combination of two or more of the substances included in the component (E). Good. When two or more types are used in combination, the mixing ratio of each substance is not particularly limited and can be set as appropriate.

  Furthermore, the oil-in-water emulsified cosmetic of the present invention preferably contains (F) component: hydrogenated lecithin. Hydrogenated lecithin is a lecithin derivative obtained by hydrogenating lecithin and is also referred to as hydrogenated lecithin. The lecithin is not particularly limited, but preferably has a phosphatidylcholine content of 60% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, and most preferably 90% by mass or more. For example, soybean lecithin, corn lecithin, cottonseed oil lecithin, egg yolk lecithin, egg white lecithin and the like can be mentioned. Commercially, for example, Phospholipon 80H and Phospholipon 90H (manufactured by Lipoid Kosmetik), Lipoid P100-3 and Lipoid P75-3 ( (Lipoid), COATSOME NC-21, COATSOME NC-61 (Nissho), Basis LS-60HR (Nisshin Oillio Group), hydrogenated lecithin (Ajinomoto Healthy Supply), etc. .

  The content of the component (F) in the oil-in-water emulsified cosmetic of the present invention is not particularly limited, and is, for example, about 0.01 to 0.2% by mass, preferably 0.025 to 25% based on the total amount of the composition. About 0.175 mass%, More preferably, it is about 0.05-0.15 mass%.

  Moreover, the oil-in-water emulsified cosmetic of the present invention may contain other components in addition to the components described above. The other components are not particularly limited, and usually components that can be blended in cosmetics can be used. For example, fats and oils other than the component (A), surfactants other than the components (B) to (D), polymer compounds, alcohols, humectants, antioxidants, ultraviolet absorbers, preservatives, chelating agents Ingredients such as amino acids, saccharides, vitamins, animal and plant extracts, colorants, powders such as inorganic powders and organic powders, and pH adjusters such as organic acids and inorganic acids.

  (A) Oils and fats other than component include vegetable oils other than meadow foam oil; animal oils; hydrocarbon oils such as liquid paraffin, squalane and petrolatum; chain polysiloxane, cyclic polysiloxane, methyltrimethicone, silicone resin, modified poly Examples include silicone oils such as siloxane; higher fatty acids such as lauric acid, stearic acid, and oleic acid; waxes such as beeswax, lanolin, and derivatives thereof; monoalkyl fatty acid esters; polyhydric alcohol fatty acid esters;

  Examples of surfactants other than the components (B) to (D) and (F) include anionic surfactants such as fatty acid soaps, alkyl ether carboxylates, polyoxyethylene alkyl ether phosphates and N-acyl taurine salts. Agents: Amphoteric surfactants such as imidazoline amphoteric surfactants and betaine surfactants; sorbitan surfactants, polyglycerin fatty acid esters, propylene glycol fatty acid esters, alkylglycosides, polyoxyethylene sorbitan surfactants, poly Oxyethylene glycerin fatty acid ester, polyoxyethylene propylene glycol fatty acid ester, polyoxyethylene hydrogenated castor oil derivative, glycerin alkyl ether, polyoxyethylene alkyl ether, pluronic surfactant, alkanolamide, etc. Nonionic surface active agents.

  Examples of the polymer compound include non-natural polymers such as polyethylene glycol having an average molecular weight of about several tens of thousands; a cellulose polymer; an alginic acid polymer; a starch polymer; an acrylic polymer; a vinyl polymer; Natural materials such as plant polymers such as carrageenan, pectin, agar, starch, gum arabic, guar gum, and alge colloid, animal polymers such as collagen and derivatives thereof, casein and gelatin, and microbial polymers such as xanthan gum and gellan gum Based polymers.

  Examples of alcohols include monovalent lower alcohols such as ethyl alcohol and butyl alcohol; higher alcohols such as lauryl alcohol, stearyl alcohol, behenyl alcohol, and batyl alcohol; ethylene glycol, propylene glycol, 1,3-butylene glycol, glycerin, and the like. Polyhydric alcohol polymers such as dipropylene glycol, diglycerin, polyglycerin; sugar alcohols such as sorbitol, maltitol, mannitol, erythritol; other alcohols such as lanolin alcohol, cholesterol, phytosterol, etc. Can be mentioned.

  Examples of humectants include polyhydric alcohols such as low molecular weight polyethylene glycol, propylene glycol, 1,3-butylene glycol, glycerin, chondroitin sulfate, hyaluronic acid, sodium lactate, pyrrolidone carboxylate, collagens, plant extracts. Etc.

  The average particle diameter of the oil droplets in the oil-in-water emulsified cosmetic of the present invention is preferably 1.0 to 2.0 μm, more preferably 1.0 to 1.75 μm, and 1.05 to 1 More preferably, the thickness is 65 μm. The average particle diameter of the oil droplets is a median diameter measured by a laser diffraction particle size distribution measuring device (trade name: SALD-2200, manufactured by Shimadzu Corporation).

  Moreover, it is preferable that the oil droplet in the oil-in-water type emulsion cosmetic of this invention has a small particle size distribution width. Specifically, the standard deviation of the particle size distribution of the oil droplets is preferably 0.20 or less, more preferably 0.19 or less, still more preferably 0.18 or less, 0.17 More preferably, it is more preferably 1.6 or less. The standard deviation of the particle size distribution of the oil droplets is a value measured by a laser diffraction particle size distribution measuring device (trade name: SALD-2200, manufactured by Shimadzu Corporation).

  The form of the oil-in-water emulsified cosmetic of the present invention is not particularly limited, and for example, it can be suitably used as a cosmetic such as cream or emulsion.

  The method for producing the oil-in-water emulsified cosmetic of the present invention is not particularly limited, and can be produced according to a conventional method. For example, it can be manufactured as follows. The oil phase containing the component (A) and the component (D) and the water phase containing the component (B) and the component (C) were prepared, respectively, and heated as necessary (preferably about 70 to 90 ° C.). Then, it can manufacture by mixing a water phase and an oil phase, emulsifying, and cooling an emulsion (preferably less than 50 degreeC). In mixing, an emulsifier such as a homomixer or a homogenizer can be used.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated further in detail, this invention is not limited to the following example.

Production Example: Preparation of oil-in-water emulsified cosmetics An oil phase and an aqueous phase were prepared by mixing the components in the blending amounts shown in Examples 1 to 10 and Comparative Examples 1 to 4 in Table 1 below. Next, the water phase and the oil phase were heated to 80 to 85 ° C., and then the oil phase was added to the water phase, emulsified using a homomixer, and cooled to about 45 ° C. Then, in the compounding amounts shown in Examples 1 to 10 and Comparative Examples 1 to 4 below in Table 1, Examples 1 to 10 and Comparative Examples were added by adding a neutralizing agent and a preservative and stirring uniformly. 1-4 cosmetics were prepared.

  After preparing the cosmetics of Examples 1 to 10 and Comparative Examples 1 to 4, it was confirmed by visual observation that all the cosmetics were emulsified.

Test Example: Analysis of Particle Size Distribution For the oil-in-water emulsion cosmetics of Examples 1 to 10 and Comparative Examples 1 to 4 prepared in the above production examples, a particle size distribution measuring device (trade name: SALD-2200, manufactured by Shimadzu Corporation) Was used to analyze the particle size distribution of the oil droplets. The analysis result of the particle size distribution of the oil droplet in each oil-in-water type emulsified cosmetic is shown in FIGS. Furthermore, the average particle diameter (median diameter) of the oil droplets and the standard deviation of the particle size distribution were calculated. The calculation results are shown in the test result column of Table 1 below.

  From the above results, in cosmetics (Comparative Examples 1 to 4) containing meadowfoam oil, water-soluble sucrose fatty acid ester, and glycerin monofatty acid ester, oil droplets having an average particle diameter exceeding 2 μm are formed. It was confirmed that uneven oil droplet particles having a wide distribution width were formed. On the other hand, in the cosmetics (Examples 1 to 10) containing meadowfoam oil, water-soluble sucrose fatty acid ester, glycerin monofatty acid ester, and N-acyl glutamic acid, oil droplets having an average particle diameter of 2 μm or less are formed. It was confirmed that uniform oil droplet particles having a small particle size distribution were formed.

Claims (7)

(A) component: Meadow foam oil,
(B) component: N-acyl glutamic acid and / or salt thereof,
(C) Component: Water-soluble sucrose fatty acid ester, and (D) component: Oil-in-water type emulsified cosmetic containing glycerol mono fatty acid ester. The oil-in-water emulsified cosmetic according to claim 1, comprising 1 to 20% by mass of the component (A) based on the total amount of the composition. The oil-in-water emulsified cosmetic according to claim 1 or 2, comprising 0.05 to 0.5% by mass of the component (B) based on the total amount of the composition. Furthermore, (E) component: The oil-in-water emulsion cosmetic in any one of Claims 1-3 containing a higher alcohol. Furthermore, (F) component: The oil-in-water type emulsion cosmetic in any one of Claims 1-4 containing hydrogenated lecithin. The oil-in-water emulsified cosmetic according to any one of claims 1 to 5, wherein the average particle size of the oil droplets is 1.0 to 2.0 µm. The oil-in-water emulsified cosmetic according to any one of claims 1 to 6, wherein the standard deviation of the particle size distribution of the oil droplets is 0.20 or less.