JP5695388B2 - Oil-in-water emulsion composition - Google Patents

Description

  The present invention relates to an oil-in-water emulsion composition which is excellent in storage stability and use feeling and is suitable as a cosmetic, particularly a skin cosmetic.

  Conventionally, as a method of preparing an emulsion that does not feel sticky / null when applied to the skin, a method of emulsifying using a small amount of an oil and a surfactant, water solubility of carboxyvinyl polymer, xanthan gum, alkyl-modified carboxyvinyl polymer, etc. A method of emulsifying using a polymer and a method of using them together are known. However, these emulsions are also well known to cause instability of the system and decrease in feel when an electrolyte is blended.

  In order to maintain the stability of a gel using a water-soluble polymer even in the presence of an electrolyte, a technique using a hydroxylated phospholipid in combination with a water-soluble polymer is known (see Patent Document 1). In addition, although a technique for improving the viscosity or hardness by increasing the internal phase ratio of the oil-in-water emulsified cosmetic is taken, it is well known that it leads to a further decrease in touch (Patent Document). 2). Therefore, an oil-in-water emulsified cosmetic that is stable even when an electrolyte is blended and has a good feeling in use has been demanded.

JP 2008-115113 A JP 2003-104863 A

  That is, the present invention is an oil-in-water type that has an excellent feeling of use that does not cause stickiness / nullness derived from electrolytes, surfactants, oils, water-soluble polymers, etc., has high storage stability, and contains a high amount of electrolyte. It is an object to provide an emulsified composition.

  The inventor uses a combination of an electrolyte, a sorbitan fatty acid ester and a sucrose fatty acid ester, an N-acylamino acid and / or a salt thereof, and a higher alcohol, so that even when the electrolyte is highly blended, It has been found that an oil-in-water emulsion composition having both usability and storage stability can be obtained.

  That is, the present invention provides an oil-in-water emulsion composition containing the following components (a) to (d).

(a) Electrolyte 0.3-8% by mass
(b) Sorbitan fatty acid ester and sucrose fatty acid ester Total 0.45 to 6.5% by mass
(c) N-acylamino acid and / or salt thereof 0.01 to 1.4% by mass
(d) Higher alcohol 0.05-6.5% by mass

  The oil-in-water emulsion composition of the present invention has excellent storage stability even when the electrolyte is highly blended, and feels sticky / null from the electrolyte, surfactant, oil and water-soluble polymer. It is extremely easy to use.

[Component (a): Electrolyte]
The electrolyte that is component (a) is a compound that releases cations (eg, metal ions) when dissolved in an aqueous solution, and can take the form of, for example, an inorganic or organic salt. Preferably, it is applied to the skin and exhibits physiological functions. For example, external preparations, particularly those that can be blended in cosmetics, external medicines or quasi drugs can be widely used. Preferably it is water-soluble or hydrophilic.

Specifically, potassium carbonate, potassium chloride, potassium sulfate, potassium sulfite, sodium carbonate, sodium chloride, sodium sulfate, sodium sulfite, sodium hydrogen sulfate, sodium hydrogen sulfite, calcium carbonate, calcium chloride, calcium sulfate, magnesium carbonate, chloride Inorganic salts such as magnesium, magnesium sulfate, zinc chloride, zinc sulfate, aluminum chloride, and aluminum sulfate; glycyrrhizinate such as dipotassium glycyrrhizinate; α-hydroxy such as aminocaproic acid, citric acid, salicylic acid, lactic acid, glycolic acid, and tartaric acid Acid salt; serine, glycine, asparagine, aspartic acid, tranexamic acid, lysine, threonine, alanine, tyrosine, valine, leucine, proline, arginine, threonine, cysteine, cysteine, Amino acids such as thionine, tryptophan, glutamic acid, pyrrolidone carboxylic acid and derivatives thereof; ascorbic acid, sodium ascorbate, potassium ascorbate, magnesium ascorbate, sodium ascorbate ester, magnesium ascorbate phosphate, calcium ascorbate phosphate calcium, Sodium ascorbate sulfate, magnesium ascorbate sulfate, calcium ascorbate sulfate, glucoside ascorbate (2-O-α-D-glucopyranosyl-L-ascorbic acid), glucosamine ascorbate, dehydroascorbic acid, vitamin B ₂ , vitamin B ₆ , Vitamin B ₁₂ , vitamin B ₁₃ , biotin, pantothenic acid, niacin, folic acid, inositol, carnitine, thiamine, thiamine disulfide , Vitamins such as sulfultiamine, dicetiamine, bisbuthiamine, bisbenchamine, benfotiamine, thiamine monophosphate disulfide, chicotiamine, octotiamine, prosultiamine; others, disodium ethylenediaminetetraacetate, triethylenediaminetetraacetate Sodium, ethylenediaminetetraacetic acid tetrasodium, sodium benzoate, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, adenosine-3'-5'-cyclic monophosphate, adenosine monophosphate, adenosine diphosphate, Examples include adenosine triphosphate and salts thereof.

  In the present invention, among these, even an electrolyte that needs to be compounded in a considerable amount in order to exert physiological functions when applied to the skin can be suitably used. Inorganic salts, amino acids and derivatives thereof, Vitamins, edetates, benzoates and the like can be mentioned as suitable electrolytes.

  In particular, in the present invention, ascorbic acid, ascorbic acid phosphate ester, ascorbic acid sulfate ester, ascorbic acid glucoside and / or a salt thereof are highly stable even if highly blended in the composition, so these ascorbic acids are suitable. Can be cited as a suitable electrolyte.

  The electrolyte salt is not particularly limited. For example, alkali salts such as sodium and potassium, inorganic salts such as calcium, magnesium, aluminum, and zinc, or organic amines such as ammonia, monoethanolamine, diethanolamine, and triethanolamine; Organic salts such as basic amino acids such as arginine and lysine can be used, and one or more of these can be used in combination. Sodium, potassium, triethanolamine, and arginine salts are preferred because they are readily available on the market.

  The content of the component (a) in the oil-in-water emulsion composition is 0.3 to 8 mass%, preferably 0.5 to 6 mass%, more preferably 0.5 to 5.5 mass%. If it is in the said range, since the effect which electrolyte has is fully exhibited and it is excellent in storage stability, it is preferable.

[Component (b): Sorbitan fatty acid ester and sucrose fatty acid ester]
The component (b) sorbitan fatty acid ester and sucrose fatty acid ester are nonionic surfactants having no ethylene oxide group.

  Sorbitan fatty acid ester is a nonionic surfactant formed by ester bonding of sorbitan and a fatty acid, preferably having 8 or more carbon atoms in the fatty acid, more preferably 12 to 26, and still more preferably 14 to 26 carbon atoms. 24.

  Preferred examples of sorbitan fatty acid esters include sorbitan monocaprylate, sorbitan monolaurate, sorbitan monooleate, sorbitan monostearate, sorbitan monoisostearate, sorbitan monopalmitate, sorbitan tristearate, sorbitan tristearate, isostearic acid Examples include sorbitan, sorbitan sesquiisostearate, sorbitan oleate, sorbitan sesquioleate, sorbitan trioleate, sorbitan tristearate, and coconut oil fatty acid sorbitan containing these. Among these, sorbitan monooleate, sorbitan monostearate, sorbitan monopalmitate, sorbitan monomyristate, sorbitan monolaurate, and coconut fatty acid sorbitan are more preferable. These sorbitan fatty acid esters can be used alone or in combination of two or more.

  The sucrose fatty acid ester is a nonionic surfactant formed by esterifying a fatty acid with a hydroxyl group of sucrose (sucrose), preferably a fatty acid having 10 or more carbon atoms, more preferably 10 to 10 carbon atoms. 24, more preferably 12-20.

  Preferred examples of sucrose fatty acid esters include sucrose dioleate, sucrose distearate, sucrose dipalmitate, sucrose dimyristic ester, sucrose dilaurate, sucrose monooleate, sucrose Examples thereof include sugar monostearate, sucrose monopalmitate, sucrose monomyristic ester, sucrose monolaurate, and coconut oil fatty acid sucrose ester and palm kernel fatty acid sucrose ester containing these. . Among these, sucrose monooleate, sucrose monostearate, sucrose monopalmitate, sucrose monomyristate, sucrose monolaurate, and coconut fatty acid sucrose ester are more preferable. In the present invention, these sucrose fatty acid esters can be used alone or in combination of two or more.

  In the present invention, a sorbitan fatty acid ester and a sucrose fatty acid ester are used in combination as the component (b), whereby the storage stability is remarkably improved. The mass ratio of sorbitan fatty acid ester to sucrose fatty acid ester is preferably in the range of 15: 1 to 5: 1, more preferably 10: 1 to 8: 1. If it is in the said range, since sufficient storage stability is obtained, it is preferable.

  The total content of component (b) in the oil-in-water emulsion composition is 0.45 to 6.5% by mass, preferably 0.5 to 6% by mass, and more preferably 0.5 to 5% by mass. If it is in the said range, storage stability is favorable, there is no stickiness and a feeling of nulliness, and a usability | use_condition becomes favorable and is preferable.

[Component (c): N-acylamino acid and / or salt thereof]
The component (c) N-acylamino acid and / or salt thereof is a water-soluble surfactant. Examples of amino acids constituting the N-acyl amino acid include glutamic acid, aspartic acid, glycine, alanine, threonine, methylalanine, sarcosine, lysine, arginine and the like. These amino acids may be L-form, D-form or DL-form. One of these may be used, or two or more selected from the above group may be mixed and used. From the viewpoints of dispersion stability and no stickiness, acidic amino acids or neutral amino acids are more preferred. Specifically, glutamic acid, aspartic acid, glycine, and alanine are more preferable, and glutamic acid is particularly preferable.

  As the acyl group constituting the N-acylamino acid of component (c), an acyl group derived from a saturated or unsaturated linear or branched fatty acid having 8 to 22 carbon atoms can be used. For example, examples of fatty acids include caprylic acid, capric acid, lauric acid, myristic acid, stearic acid, isostearic acid, palmitic acid, oleic acid, linoleic acid, behenic acid, coconut oil fatty acid, palm oil fatty acid, and hardened beef tallow fatty acid. These may be used alone or in combination of two or more. In particular, lauric acid, myristic acid, stearic acid, coconut oil fatty acid, and palm oil fatty acid are preferable from the viewpoint of stability with time and lack of stickiness, and lauric acid, myristic acid, and stearic acid are particularly preferable.

  The salt of the N-acylamino acid is not particularly limited. For example, an alkali metal such as sodium or potassium, an inorganic salt such as calcium, magnesium, aluminum, or zinc, or an organic salt such as ammonia, monoethanolamine, diethanolamine, or triethanolamine. Examples thereof include organic salts such as amines and basic amino acids such as arginine and lysine, and one or more of these can be used in combination. Sodium, potassium, triethanolamine, and arginine salts are preferred because they are readily available on the market.

  Specific examples of component (c) include coconut oil fatty acid-derived acylated glutamic acid, palm oil fatty acid-derived acylated glutamic acid, lauroyl aspartic acid, myristoyl glutamic acid, lauroyl glutamic acid, stearoyl glutamic acid, and alkali metal salts thereof. Preferred are sodium lauroyl glutamate and sodium stearoyl glutamate.

  The content of the component (c) in the oil-in-water emulsion composition is 0.01 to 1.4% by mass, preferably 0.025 to 1.2% by mass, and more preferably 0.05 to 1% by mass. If it is in the said range, storage stability will improve, the feeling of roughness and the glossiness of an external appearance will improve, and it is preferable.

[Component (d): Higher alcohol]
The higher alcohol as component (d) is preferably a saturated or unsaturated linear or branched alcohol having 12 or more carbon atoms, more preferably a saturated linear alcohol having 14 to 24 carbon atoms, still more preferably carbon. It is a saturated linear alcohol having a number of 16 to 22. Specific examples include myristyl alcohol, cetyl alcohol, stearyl alcohol, aralkyl alcohol, behenyl alcohol, carnervir alcohol, and the like, and any of them can be used alone or in combination of two or more.

  The content of the component (d) in the oil-in-water emulsion composition is 0.05 to 6.5% by mass, more preferably 0.1 to 6% by mass, and still more preferably 0.1 to 5% by mass. If it is in the said range, both the feeling of roughness at the time of application | coating and the feeling of neither stickiness nor a null feeling will become favorable.

[Component (e): Silicone oil]
The oil-in-water emulsion composition of the present invention preferably further contains silicone oil as component (e). The structure of the silicone oil is not particularly limited, and may be any of cyclic, linear, and branched. Specifically, dimethylpolysiloxane, methylphenylpolysiloxane, diethylpolysiloxane, ethylmethylpolysiloxane, ethylphenylpolysiloxane, cyclopolysiloxane and the like are preferable as the silicone oil. These may be used alone or as a mixture of two or more.

In particular, it is preferable to contain a low-viscosity silicone oil having a kinematic viscosity at 25 ° C. of 1 × 10 ⁻⁵ m ² / s (10 cSt) or less from the viewpoint that a good feeling without stickiness / nullness can be obtained. Low viscosity silicones include hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, And tris (trimethylsiloxy) methylsilane.

The content of the component (e) in the oil-in-water emulsion composition is preferably 5 to 20% by mass, more preferably 8 to 15% by mass. If it is in the said range, since there is no stickiness and a null feeling and storage stability is also favorable, it is preferable. In particular, the component (e) contains a low-viscosity silicone oil having a kinematic viscosity at 25 ° C. of 1 × 10 ⁻⁵ m ² / s (10 cSt) or less, preferably 30% by mass or more, more preferably 40% by mass or more. It is preferable.

[Component (f): Polyhydric alcohol]
The oil-in-water emulsion composition of the present invention preferably further contains a polyhydric alcohol (excluding (g) saccharide described later) as component (f). The polyhydric alcohol is not particularly limited as long as it is a dihydric or higher alcohol.

  Specific examples of the polyhydric alcohol include glycerin, diglycerin, triglycerin, polyglycerin, 3-methyl-1,3-butanediol, 1,3-butylene glycol, isoprene glycol, polyethylene glycol, 1,2- Examples include pentanediol, 1,2-hexanediol, propylene glycol, dipropylene glycol, polypropylene glycol, ethylene glycol, diethylene glycol, and neopentyl glycol. These may be used alone or in combination of two or more. Can do.

  As the polyhydric alcohol, it is preferable to use a polyhydric alcohol having 3 or more hydroxyl groups in one molecule. In particular, it is preferable to use glycerin because the gloss of the appearance is improved.

  The content of the component (f) in the oil-in-water emulsion composition is preferably 5 to 25% by mass, more preferably 5 to 20% by mass, based on the total amount of the composition. If it is in the said range, storage stability will become favorable.

[Component (g): Sugar]
The oil-in-water emulsion composition of the present invention preferably further contains a saccharide as component (g). As the saccharide, one or more kinds selected from monosaccharide to hexasaccharide and these sugar alcohols are preferably used.

  The number of constituent sugars of monosaccharide to hexasaccharide used in the present invention is 1 to 6, which may be either D-form or L-form, or a mixture thereof. It can use individually or in combination of 2 or more types as appropriate.

  Monosaccharide to hexasaccharide include treose, xylobiose, arabinose, xylose, galactose, glucose, mannose, fructose, maltose, isomaltose, trehalose, neotrehalose, isotrehalose, lactose, sucrose, glucosyl trehalose, isomalt triose, malto Examples include triose, raffinose, maltosyl trehalose, maltotetraose, maltotriosyl trehalose, maltopentaose, maltohexaose. Preferred monosaccharide to hexasaccharide are glucose, xylobiose, trehalose, glucosyl trehalose, and raffinose, and more preferably xylobiose and glucosyl trehalose.

  Examples of the sugar alcohol include those obtained by reducing the aldose or ketose carbonyl group of the monosaccharide to hexasaccharide. The number of constituent sugars is 1-6, preferably 1-3. These may be either D-form or L-form, or may be a mixture thereof, which can be used alone or in combination of two or more.

  Examples of the sugar alcohol include erythritol, xylitol, ribitol, arabitol, galactitol, sorbitol, inositol, mannitol, palatinit, maltitol, lactitol, isomaltose, maltotriitol, maltopentitol, maltopentitol, maltohexatriitol. And tall. Preferred sugar alcohols are xylitol, sorbitol and maltitol, more preferably sorbitol and maltitol.

  In addition, the saccharide may be acylated, etherified, added with alkylene oxide, or modified with an appropriate organic residue of an acetanolated sugar except for at least one hydroxyl group.

  The content of the component (g) in the oil-in-water emulsion composition is preferably 0.35 to 15% by mass, more preferably 0.5 to 12% by mass. If it is in the said range, a moist feeling is favorable and there is neither a squeaky feeling nor a sticky feeling, which is preferable.

[Other optional ingredients]
In addition to the components (a) to (g) described above, the oil-in-water emulsion composition of the present invention includes an oil agent, water, a thickener, an ultraviolet absorber, a sequestering agent, a neutralizing agent, and an antioxidant. Various raw materials usually used in cosmetics such as antibacterial agents, drugs, and various extracts can be used.

  Examples of the oil agent include oily components that are usually used in cosmetics. Specifically, triglycerides (liquid natural fats and oils), waxes, ester oils, hydrocarbon oils, sterols, higher fatty acids, fluorine oils, etc. Is mentioned. The content of these oil agents varies depending on the form of the oil-in-water emulsion composition, but it is 0.1 to 40% by mass, more preferably 10 to 30% by mass, based on the total amount of the oil-in-water emulsion composition, and the feeling of use and storage stability. From the viewpoint of sex.

  Liquid oils include linseed oil, camellia oil, macadamia nut oil, corn oil, mink oil, olive oil, avocado oil, sasanqua oil, castor oil, safflower oil, kyounin oil, cinnamon oil, jojoba oil, grape oil, sunflower oil , Almond oil, rapeseed oil, sesame oil, wheat germ oil, rice germ oil, rice bran oil, cottonseed oil, soybean oil, peanut oil, tea seed oil, evening primrose oil, egg yolk oil, cow leg fat, liver oil and the like.

  Examples of the solid natural fat include bonito fat, coconut oil, palm oil, palm kernel oil, beef tallow, sheep fat, lard, horse fat, hardened oil, hardened castor oil, owl, and shea butter.

  Examples of the waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ibotarou, whale wax, montan wax, nuka wax, lanolin, reduced lanolin, hard lanolin, kapok wax, sugar cane wax, jojoba wax, shellac wax and the like.

  Examples of ester oils include octanoic esters such as cetyl octanoate, lauric esters such as hexyl laurate, myristate esters such as isopropyl myristate and octyldodecyl myristate, palmitate esters such as octyl palmitate, and isocetyl stearate. Stearic acid ester, isostearic acid ester such as isopropyl isostearate, isopalmitic acid ester such as octyl isopalmitate, oleic acid ester such as isodecyl oleate, adipic acid diester such as diisopropyl adipate, sebacic acid such as diethyl sebacate Diester, diisostearyl malate, glyceryl trioctanoate, triglyceride such as glyceryl triisostearate, trimethylol triisostearate Trimethylolpropane fatty acid esters of bread, etc., pentaerythritol fatty acid esters such as tetramethylammonium octanoate pentaerythritol and the like.

  Examples of the hydrocarbon oil include liquid paraffin, α-olefin oligomer, squalane, squalene, pristane, paraffin, isoparaffin, ceresin, petrolatum, microcrystalline wax, and the like.

  Examples of sterols include cholesterol, sitosterol, phytosterol, lanosterol and the like.

  Thickeners include gum arabic, gum tragacanth, galactan gum, carob gum, guar gum, caraya gum, carrageenan, pectin, agar, quince seed (malmello), starch (rice, corn, potato, wheat), alge colloid (brown algae extract), etc. Plant polymers; microbial polymers such as dextran, succinoglucan and pullulan; animal polymers such as collagen, casein, albumin and gelatin; starch polymers such as carboxymethyl starch and methylhydroxypropyl starch; , Nitrocellulose, ethyl cellulose, methyl hydroxypropyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate, hydroxypropyl cellulose, carboxymethyl cellulose nato Cellulose polymers such as sodium, crystalline cellulose and cellulose powder; Alginic polymers such as sodium alginate and propylene glycol alginate; Vinyl polymers such as polyvinyl methyl ether and carboxyvinyl polymer (eg CARBOPOL 941 manufactured by GF Goodrich) Polyoxyethylene polymer; polyoxyethylene polyoxypropylene copolymer polymer; acrylic polymer such as sodium polyacrylate, polyethyl acrylate, polyacrylamide; polyethyleneimine; cationized guar gum, cationized cellulose, etc. And cationized polymers of inorganic thickeners such as bentonite, magnesium aluminum silicate, laponite, hectorite, and silicic anhydride. Any one of these thickeners can be used alone, or two or more of these thickeners can be used in combination. By adding these thickeners in a small amount so as not to feel stickiness and / or nulliness, the storage stability is further improved.

  Examples of UV absorbers include benzoic acid UV absorbers such as paraaminobenzoic acid, anthranilic acid UV absorbers such as methyl anthranilate; salicylic acid UV absorbers such as octyl salicylate, phenyl salicylate, and homomethyl salicylate; Isopropyl acid, octyl paramethoxycinnamate, 2-ethylhexyl paramethoxycinnamate, glyceryl mono-2-ethylhexanoate diparamethoxycinnamate, [4-bis (trimethylsiloxy) methylsilyl-3-methylbutyl] -3 Cinnamate UV absorbers such as 2,4,5-trimethoxycinnamic acid ester; 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid , Such as sodium 2-hydroxy-4-methoxybenzophenone-5-sulfonate Phenone UV absorbers; urocanic acid, ethyl urocanate, 2-phenyl-5-methylbenzoxazole, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 4-tert-butyl-4'- And methoxybenzoylmethane.

  As neutralizing agents, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, potassium hydroxide, sodium hydroxide, triethanolamine, sodium carbonate, arginine, Examples include lysine.

  Examples of the antioxidant include α-tocopherol, β-tocopherol, γ-tocopherol, dibutylhydroxytoluene, butylhydroxyanisole and the like.

  Examples of the antibacterial agent include paraoxybenzoic acid ester, parachloromethcresol, hexachlorophene, trichlorocarbanilide, photosensitizer, phenoxyethanol, chlorphenesin and the like.

Drugs include vitamin A oil, retinol, retinol palmitate, inositol, allantoin, azulenicotinic acid dl-α-tocopherol, vitamin D ₂ (ergocasiferol), dl-α-tocopherol, dl-α-tocopherol acetate, Arbutin, zinc oxide, tannin, L-menthol, camphor, sulfur and the like can be mentioned.

  Various extract liquids include Dokudami Extract, Oat Extract, Merilot Extract, Oyster Extract, Licorice Extract, Peonies Extract, Soap Extract, Loofah Extract, Kina Extract, Yakinoshita Extract, Clara Extract, Kouhon Extract, Fennel Extract, Primrose Extract, Rose Extract , Ginger extract, Lemon extract, Shikon extract, Aloe extract, Ginger root extract, Eucalyptus extract, Horsetail extract, Sage extract, Thyme extract, Tea extract, Seaweed extract, Cucumber extract, Clove extract, Raspberry extract, Melissa extract, Carrot extract, Carrot extract , Horse chestnut extract, peach extract, peach leaf extract, mulberry extract, cornflower extract, clam extract, placenta extract, thymus extract, silk extract and the like.

  In addition to the above drugs being used in a free state, those capable of salt formation can be used in the form of acid or base salts, and those having a carboxylic acid group can be used in the form of their esters.

  Furthermore, in the oil-in-water emulsion composition of the present invention, an appropriate fragrance, pigment or the like can be added as needed without impairing the emulsion stability.

  Although the use of the oil-in-water emulsion composition of the present invention is arbitrary, it can be suitably used for cosmetics, pharmaceuticals, quasi drugs and the like. Specifically, hair cosmetics such as shampoos, rinses and conditioners; skin cosmetics such as face wash, cleansing cosmetics, lotions, emulsions, beauty creams, base cosmetics, sunscreen cosmetics, packs, massage cosmetics; It can be suitably used as an external medicine such as an ointment or cream containing various drugs. In particular, since the oil-in-water emulsion composition of the present invention does not have a sticky feeling or a feeling of nulliness, it can be suitably used as a skin cosmetic.

  The dosage form of the oil-in-water emulsion composition of the present invention is arbitrary, and is prepared as a liquid, emulsion, gel, spray, mousse or the like.

  Next, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto. In addition, the compounding quantity shown below is the mass%.

Examples 1-6, Comparative Examples 1-9 (cream)
Creams having various compositions shown in Table 1 were produced, and the appearance, feel, high temperature and low temperature storage stability were evaluated according to the following evaluation methods. The cream was prepared by adding the oil phase of B to the water phase of A dissolved at 80 ° C., emulsifying with an emulsifier, cooling to 50 ° C. and adding the electrolyte phase of C. .
In Table 1, Example 6 is a reference example and is not included in the scope of the claims.

(Usage evaluation)
The 15 female panel members evaluated the cream feel in terms of 5 points on the three points of “goodness of elongation”, “goodness of skin fit”, and “feel of stickiness / nullness”, and the average score (decimal point) Judgment was made by calculating the second round and below.

(5-level evaluation)
5 points: very good 4 points: good 3 points: normal,
2 points: Somewhat bad 1 point: Bad

(Appearance evaluation)
The state of the evaluation sample on the next day of production was visually evaluated. The surface appearance of the cream is “◯” when the gloss has a uniform luster, and there is a part with a weak luster, but when the gloss is seen, “△”, the gloss is seen When there was not, it evaluated as "x".

(Storage stability evaluation)
The evaluation sample was held for one month under high temperature conditions (50 ° C.) or low temperature conditions (−20 ° C., frozen state), and the state after one month was visually evaluated. When there was no particular problem in appearance, “◯” was evaluated, “Δ” was evaluated when slight oil floating was observed at the gas-liquid interface, and “X” was evaluated when separation or precipitation of crystals could be confirmed.

  As shown in the evaluation results in Table 1, the cream of the present invention had good appearance and feel of the preparation and excellent storage stability at high and low temperatures.

  In contrast, Comparative Examples 1 and 2 are cases where the amount of component (b) is small and excessive, respectively, but it is understood that these ratios adversely affect the storage stability and the appearance of the preparation. Comparative Examples 3 and 4 are the case where component (c) is not blended and the case where it is excessive, respectively, but it can be seen that similarly to Comparative Examples 1 and 2, the storage stability and the appearance of the preparation are adversely affected. Comparative Examples 5 and 6 are the case where component (d) is not blended and the case where it is excessive, respectively, but it is understood that this comparative product also adversely affects the storage stability and the appearance of the preparation. In Comparative Example 7, sorbitan fatty acid ester in component (b) is substituted with a POE adduct, but it is found that the storage stability and the appearance of the preparation are adversely affected. Comparative Examples 8 and 9 are cases in which the sorbitan fatty acid ester and sucrose fatty acid ester of component (b) were each used alone, but it was found that the storage stability, the appearance of the preparation and the feeling of use were adversely affected.

Example 7 (Moisturizing serum)
In the following formulation, after adding the oil phase (B) dissolved at 80 ° C. to the water phase (A) heated and dissolved at 80 ° C., the mixture was emulsified with an emulsifier, cooled to 50 ° C., and then the alcohol phase (C ) And electrolyte phase (D) were added to prepare a cosmetic solution. When the prepared essence was evaluated in the same manner as described above, the essence of the present example had no stickiness / nullness as in Examples 1 to 6 and showed excellent usability and high storage stability. I understood.

Ingredient name Compounding amount (%)
A. Aqueous phase sorbitan stearate 1.8
Coconut fatty acid sucrose ester 0.2
N-lauroyl-L-sodium glutamate 0.5
Edetic acid disodium 0.02
Glycerin 5.0
Dipropylene glycol 5.0
Xanthan gum 0.2
Carboxyvinyl polymer 0.2
Polyethylene glycol 4000 1.0
Chlorphenesin 0.2
Coloring agent Suitable amount Purified water Remaining amount B. Oil phase Behenyl alcohol 3.0
Octyldodecyl myristate 1.0
Phenyltrimethicone 5.0
Dimethylpolysiloxane (6mm ² / s) 5.0
Olive oil 3.0
Jojoba oil 2.0
Perfume appropriate amount C.I. Alcohol phase Ethanol 8.0
Phenoxyethanol 0.5
D. Electrolyte phase Ascorbic acid 2-glucoside 3.0
Purified water 6.0
Potassium hydroxide appropriate amount

Example 8 (Cosmetic liquid ; reference example and not included in the scope of the claims )
In the following formulation, after adding the oil phase (B) dissolved at 80 ° C. to the water phase (A) heated and dissolved at 80 ° C., the mixture was emulsified with an emulsifier, cooled to 50 ° C., and then the alcohol phase (C ) And electrolyte phase (D) were added to prepare a cosmetic solution. When the prepared cosmetic liquid was evaluated in the same manner as described above, the cosmetic liquid of the present example was excellent in refreshing feeling, and, like Examples 1 to 6, showed no feeling of stickiness / nullness and exhibited an excellent feeling of use and stable storage. It turns out that the nature is high.

Ingredient name Compounding amount (%)
A. Aqueous phase sorbitan stearate 0.45
Coconut fatty acid sucrose ester 0.05
Sodium N-lauroyl-L-glutamate 0.05
Edetic acid disodium 0.02
Glycerin 10.0
Xanthan gum 0.1
Starch 1.5
Polyethylene glycol 4000 1.0
Chlorphenesin 0.2
Coloring agent Suitable amount Purified water Remaining amount B. Oil phase Behenyl alcohol 1.0
Light liquid isoparaffin 10.0
Dimethylpolysiloxane (6mm ² / s) 1.0
α-Olefin oligomer 3.0
PLASTIC POWDER D-800 (Toyo Pigment Co., Ltd.) 2.0
Perfume appropriate amount C.I. Alcohol layer Ethanol 10.0
Phenoxyethanol 0.5
D. Electrolyte phase Ascorbic acid 2-glucoside 1.0
Purified water 2.0
Potassium hydroxide appropriate amount

Example 9 (milky lotion)
In the following formulation, after adding the oil phase (B) dissolved at 80 ° C. to the water phase (A) heated and dissolved at 80 ° C., the mixture is emulsified with an emulsifier, cooled to 50 ° C., and then the electrolyte phase (C ) Was added to prepare an emulsion. When the prepared emulsion was evaluated in the same manner as described above, it was found that the emulsion of this example showed no feeling of stickiness / nullness as in Examples 1 to 6 and showed excellent usability and high storage stability. .

Ingredient name Compounding amount (%)
A. Aqueous phase sorbitan stearate 0.9
Palm oil fatty acid sucrose ester 0.1
N-lauroyl-L-sodium glutamate 1.0
Edetic acid disodium 0.02
Glycerin 5.0
Dipropylene glycol 5.0
Carboxyvinyl polymer 0.4
Polyethylene glycol 4000 3.0
Chlorphenesin 0.2
Coloring agent Suitable amount Purified water Remaining amount B. Oil phase Stearic acid 0.5
Olive oil 7.0
Behenyl alcohol 0.5
α-Olefin oligomer 3.0
Dimethylpolysiloxane (6mm ² / s) 5.0
Paraffin wax 2.0
Heavy isoparaffin 1.0
PLASTIC POWDER D-800 (Toyo Pigment Co., Ltd.) 2.0
Perfume appropriate amount C.I. Electrolyte phase Ascorbic acid 2-glucoside 5.0
Purified water 10.0
Potassium hydroxide appropriate amount

  The composition of the fragrance used in Examples 7 to 9 is shown in Table 2.

Claims (5)

An oil-in-water emulsion composition comprising the following components (a) to (e):
(a) Electrolyte 0.3-8% by mass
(b) The sorbitan fatty acid ester and sucrose fatty acid ester content mass ratio is 15: 1 to 5: 1, and the total is 0.45 to 6.5% by mass.
(c) N-acylamino acid and / or salt thereof 0.01 to 1.4% by mass
(d) Higher alcohol 0.05-6.5% by mass
(e) Silicone oil 5-20% by mass Further, (f) a polyhydric alcohol, an oil-in-water emulsion containing 5-25% by weight in the composition according to claim 1 oil-in-water emulsion composition. The oil-in-water emulsion composition according to claim 1 or 2 , further comprising (g) one or more selected from monosaccharide to hexasaccharide and sugar alcohols thereof. The oil-in-water emulsion composition according to any one of claims 1 to 3 , wherein the component (a) is ascorbic acid 2-glucoside. The oil-in-water emulsion composition according to any one of claims 1 to 4 , wherein the component (c) is sodium N-lauroyl-L-glutamate.