JP2012031088A - Oil-in-water emulsion composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil-in-water emulsion composition having a fresh feeling and a stickiness-free texture without deteriorating stability with the lapse of time even when a salt type bleaching agent is mixed, and capable of imparting a good tense feeling.SOLUTION: The oil-in-water emulsion composition containing the salt type bleaching agent in an aqueous phase contains (a) one or more kinds selected from a 14 to 22C higher alcohol, (b) one or more kinds selected from hydrophilic polyoxyethylene alkyl ether, (c) one or more kinds selected from glycerol monoalkyl ether, and (d) 0.1-5 mass% of a semisolid oil component. In the oil-in-water emulsion cosmetic, the alkyl parts in (b) and (c) are linear saturated alkyl groups, and the molar concentrations of (a) to (c) satisfy the relation: [(b)+(c)]/(a)=0.1 to 1.0, and the viscosity is 1,500-10,000 mPa s at 30°C.

Description

  The present invention relates to an oil-in-water emulsion composition. More specifically, the present invention relates to an oil-in-water emulsion composition that can be stably blended with a salt-type whitening agent, has good usability, and can realize an excellent elasticity.

  The oil-in-water emulsion composition is widely used as a base for external preparations for skin including skin cosmetics because of its fresh feeling. At that time, a thickener is generally used in order to enhance the usability and stability. For example, carboxyvinyl polymer is widely used for base thickening of skin care preparations because it has a high thickening viscosity and is crushed freshly when applied to the skin.

 However, it is known that the carboxyvinyl polymer has low salt resistance, and the viscosity is remarkably lowered when a high salt content is added. This is thought to be because the electrostatic repulsion between the negatively charged carboxyl groups that are ionized is shielded by the salt and decreases. When a high concentration of carboxyvinyl polymer is blended in order to compensate for such a decrease in viscosity due to salt, stickiness and twisting (polymer waste) occur, and the feeling of use is impaired.

  In Patent Document 1, alkoxy salicylic acid which is a salt type whitening agent is obtained by using an α-gel base formed from a long-chain acyl sulfonate type anionic surfactant, a higher aliphatic alcohol, water, and an oil component. It is described that water can be blended stably. With this composition, a feeling of freshness is obtained, but it does not have an effect of imparting a firm feeling to the skin.

  On the other hand, in order to obtain a firm feeling, for example, polyvinyl alcohol, sodium alginate, mucopolysaccharides and collagen, eggshell proteins and their degradation products, acrylic resin and other film-forming components, spherical and other powders, cross-linked methyl Polysiloxane has been conventionally used (Patent Documents 2 and 3). In addition, a cosmetic blended with an oily base containing an ester of dimer acid and / or dimer diol with excellent water retention in combination with the film-forming component and the moisturizing component as described above has a good gloss feeling on the skin. It is also known that a firm feeling can be given (Patent Document 4). Patent Document 5 describes a skin external preparation excellent in firmness in which a film component and natto extract are blended.

  However, when these conventional ingredients are added in an amount that provides sufficient elasticity and elasticity, they may become sticky or sticky when applied, have poor stability under long-term storage, and affect the stability of other additive ingredients. There was a problem such as. Furthermore, there has been a demand for a base material that has a lasting feeling of elasticity and effect.

JP-A-2005-132806 JP-A-5-933 JP 9-315936 A JP 2007-269723 A JP 2000-34218 A

  The present invention has been made in view of the problems of the prior art, and even when a salt-type whitening agent is blended, the stability over time does not deteriorate, and it has a fresh and non-sticky feeling and is excellent. It is an object to provide an oil-in-water emulsion composition that can give a firm feeling.

  As a result of intensive studies to solve the above problems, the inventors have found that a composition containing a higher alcohol, a polyoxyethylene alkyl ether, and a glycerin monoalkyl ether in a specific ratio gives the skin elasticity and firmness. The present invention has been found to have an effect to be brought about, and further, by using a semi-solid oil component together, it was found that a decrease in viscosity due to a salt-type whitening agent can be suppressed, and the present invention has been completed.

That is, the present invention is an oil-in-water emulsion composition containing at least one salt-type whitening agent in an aqueous phase,
(A) one or more selected from higher alcohols having 14 to 22 carbon atoms;
(B) one or more selected from hydrophilic polyoxyethylene alkyl ethers;
(C) one or more selected from glycerin monoalkyl ethers;
(D) 0.1 to 5% by mass of a semi-solid oil component,
The alkyl part of (b) and (c) is a linear saturated alkyl chain, and the molar concentration of (a) to (c) is [(b) + (c)] / (a) = 0. Provided is an oil-in-water emulsified cosmetic that satisfies the relationship of 1 to 1.0 and has a viscosity of 1500 to 10,000 mPa · s at 30 ° C.

  According to the present invention, an oil-in-water emulsification that not only exhibits an excellent whitening effect due to a salt-type whitening agent, but can also give a firm feeling to the skin, is excellent in stability over time, and has a fresh feeling of use. A composition can be obtained.

  The oil-in-water emulsion composition of the present invention contains a salt-type whitening agent. The “salt-type whitening agent” in the present invention means a whitening agent which is itself a salt type or is neutralized with an alkali agent to form a salt. Ascorbic acid-based whitening agent, alkoxysacillic acid-based A whitening agent is preferably used. The emulsified composition of the present invention contains at least one salt-type whitening agent.

Specific examples of the salt-type whitening agent that can be used in the present invention include the following.
Ascorbic acid-based whitening agents include ascorbic acid inorganics such as L-ascorbic acid, L-ascorbic acid monophosphate, L-ascorbic acid-2-sulfate, dl-α-tocopherol 2-L-ascorbic acid diester Acid esters; L-ascorbic acid monostearate, L-ascorbic acid monopalmitate, ascorbic acid monoalkylasters such as L-ascorbic acid monooleate; L-ascorbic acid distearate, L-ascorbic acid dipalmitate, L-ascorbic acid Ascorbic acid diesters such as dioleate; Ascorbic acid triesters such as L-ascorbic acid tristearate, L-ascorbic acid tripalmitate, L-ascorbic acid trioleate; 2-O-α-D-glucopyra Ascorbic acid-2-glycoside, such as a sill -L- ascorbate. Particularly preferred is ascorbic acid 2-glycoside. Examples of salts of these ascorbic acids and derivatives thereof include alkali metal salts (Na salts, K salts, etc.), alkaline earth metal salts (Ca salts, Mg salts, etc.), ammonium salts, alkanolamine salts, amino acid salts, and the like. Preferably, it is an alkali metal salt.

Examples of the alkoxysalicylic acid whitening agent include those described in JP-A-6-40886. Specifically, it is represented by the following general formula (I).
In the above formula, R is an alkoxy group, preferably an alkoxy group having 1 to 4 carbon atoms.
Specific compound names include 3-methoxysalicylic acid, 3-ethoxysalicylic acid, 4-methoxysalicylic acid, 4-ethoxysalicylic acid, 4-propoxysalicylic acid, 4-isopropoxysalicylic acid, 4-butoxysalicylic acid, 5-methoxysalicylic acid, 5 -Ethoxysalicylic acid and 5-propoxyxalicylic acid are exemplified, but not limited thereto. Examples of the salts of these alkoxysalicylic acid-based whitening agents include alkali metal salts (Na salts, K salts, etc.), alkaline earth metal salts (Ca salts, Mg salts, etc.), ammonium salts, alkanolamine salts, amino acid salts, and the like. An alkali metal salt is preferable.

The oil-in-water emulsion composition of the present invention contains the salt-type whitening agent in the aqueous phase (outer phase) of the emulsion base containing the components (a) to (d) shown below.
The compounding quantity of a salt type whitening agent is 0.001-30 mass% normally, Preferably it is 0.001-5 mass%.

Component (a) in the emulsified composition of the present invention is a higher alcohol having 14 to 22 carbon atoms. Specific examples include myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, oleyl alcohol and the like. One or more of these higher alcohols are used.
In particular, those having a linear saturated alkyl group are preferred, and among them, at least one selected from cetyl alcohol, stearyl alcohol, and behenyl alcohol is preferably contained.

  The compounding quantity of the higher alcohol (component a) in the emulsion composition of this invention is 0.01-10 mass% normally, Preferably, it is 0.01-5 mass%.

Component (B) in the emulsified composition of the present invention is a hydrophilic polyoxyethylene alkyl ether having a structure in which a linear saturated alkyl chain and a polyoxyethylene chain are bonded by an ether bond, and is hydrophilic. It shows sex.
In the present specification, “hydrophilicity” means that the HLB value determined by the relative strength of the hydrophilic group and the hydrophobic group is greater than 10.

Examples of the hydrophilic polyoxyethylene alkyl ether (component b) in the present invention include polyoxyethylene (10) stearyl ether, polyoxyethylene (11) stearyl ether, polyoxyethylene (20) stearyl ether, and polyoxyethylene. (30) Stearyl ether, polyoxyethylene (20) behenyl ether, polyoxyethylene (30) behenyl ether, and the like.
The polyoxyethylene alkyl ether used in the present invention is particularly preferably one having an average added mole number of polyoxyethylene chain of 10 to 30, for example, polyoxyethylene (20) stearyl ether, polyoxyethylene (20 ) Behenyl ether is preferably used.

  The compounding quantity of hydrophilic polyoxyethylene alkyl ether in the emulsion composition of this invention is 0.01-10 mass% normally, Preferably it is 0.01-5 mass%.

  Component (c) in the emulsified composition of the present invention is glycerin monoalkyl ether, and has a structure in which a linear saturated alkyl chain and glycerin are bonded by an ether bond. Specific examples include glycerin monocetyl ether (chimyl alcohol), glycerin monostearyl ether (batyl alcohol), and the like. In particular, glycerin monostearyl ether is preferably used.

  The compounding quantity of the glycerol monoalkyl ether in the emulsion composition of this invention is 0.01-10 mass% normally, Preferably, it is 0.01-5 mass%.

  In the emulsion composition of the present invention, the molar concentration of the components (a) to (c) is such that (a): [(b) + (c)] = 1: (0.1 to 1.0). In particular, (a): [(b) + (c)] = 1: (0.1 to 0.9) is preferable, and 1: (0.2 to 0. 0). 8) is most preferable. When the molar concentration ratio (a) / [(b) + (c)] is smaller than 0.11, higher alcohol is likely to precipitate during long-term storage, and when it is larger than 1.0, There is a tendency for poor conditions such as separation and viscosity change to occur at high temperatures, both of which have poor stability.

  Moreover, in the emulsion composition of this invention, it is preferable that the molar concentration of said component (a)-(c) satisfy | fills the relationship of [(a) + (c)] / (b) = 3-20. When the molar ratio [(a) + (c)] / (b) is within the above range, the stability over time is particularly excellent.

  In addition to the components (a) to (c), the emulsion composition of the present invention further contains (d) 0.1 to 5% by mass of a semi-solid oil. By blending the predetermined amount of the semi-solid oil component, it is possible to achieve excellent elasticity and sustained effect.

  The semi-solid oil used in the present invention is not particularly limited as long as it is a semi-solid oil used in skin external preparations and cosmetics. For example, petrolatum, hydrogenated palm oil, palm kernel oil, macadamia nut oil phytosteryl, tetra (Behenic acid / benzoic acid / ethylhexanoic acid) pentaerythritol and the like can be mentioned.

  The blending amount of the semi-solid oil in the emulsified composition of the present invention is 0.1 to 5% by mass as described above, and this blending amount is 1 to 50 mass with respect to the total amount of the liquid oil blended in the composition. It is preferable to adjust so that it may become the range of%. The liquid oil blended in the emulsified composition of the present invention is usually 1 to 30% by mass, preferably 5 to 15% by mass.

  The emulsified composition of the present invention containing a salt-type whitening agent and the components (a) to (d) as essential components, and their blending amounts satisfy the relationship of the molar concentration ratio, has a viscosity at 30 ° C. It is also characterized by 1500 to 10000 mPa · s. By using a composition having such a viscosity range, a fresh and non-sticky feeling can be obtained.

  In addition to the above essential components, the oil-in-water emulsion composition of the present invention usually includes components used for external preparations for skin, such as cosmetics and pharmaceuticals, such as other whitening agents, moisturizers, antioxidants, and oil components. UV absorbers, surfactants, moisturizers, thickeners, alcohols, powder components, color materials, aqueous components, water, various skin nutrients, and the like can be appropriately blended as necessary.

  Examples of the oil component include camellia oil, macadamia nut oil, olive oil, castor oil, safflower oil, soybean oil, tea seed oil, cocoa butter, coconut oil, hydrogenated palm oil, palm oil, owl, hydrogenated castor oil, beeswax, Natural oils such as candelilla wax, carnauba wax, lanolin, liquid lanolin, jojo wax, hard lanolin, polyoxyethylene lanolin alcohol ether, polyoxyethylene cholesterol ether, liquid paraffin, ozokerite, squalene, paraffin, ceresin, petrolatum, microcrystalline wax, etc. Hydrocarbon oils, isopropyl myristate, octyldodecyl myristate, isopropyl palmitate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexylate, dipe Synthetic oil components such as taerythritol fatty acid ester, pentaerythritol tetra-2-ethylhexylate, glycerin tri-2-ethylhexylate, trimethylolpropane triisostearate, cetyl-2-ethylhexanoate, castor oil fatty acid methyl ester, dimethyl It forms a chain polysiloxane such as polysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, cyclic polysiloxane such as decamethylpolysiloxane, dodecamethylpolysiloxane, tetramethyltetrahydrogenpolysiloxane, and three-dimensional network structure. Examples thereof include silicon resins and silicones such as silicon rubber.

  Examples of the ultraviolet absorber include benzoic acid-based ultraviolet absorbers such as paraaminobenzoic acid, paraaminobenzoic acid monoglycerin ester, N, N-dipropoxyparaaminobenzoic acid ethyl ester, and N, N-dimethylparaaminobenzoic acid ethyl ester. Anthranilic acid-based UV absorbers such as homomenthyl-N-acetylanthranylate, amyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, salicylic acid-based UV absorbers such as p-isopropanol phenyl salicylate, octylcinnamate, Ethyl-4-isopropylcinnamate, methyl-2,5-diisopropylcinnamate, ethyl-2,4-diisopropylcinnamate, propyl-p-methoxycinnamate, Amyl-p-methoxycinnamate, octyl-p-methoxycinnamate (2-ethylhexyl-p-methoxycinnamate), 2-ethoxyethyl-p-methoxycinnamate, 2-ethylhexyl-α-cyano-β-phenylcinna Cinnamate UV absorbers such as glyceryl mono-2-ethylhexanoyl-di-p-methoxycinnamate, 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2 ' , 4,4′-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4′-phenylbenzophenone-2 -Carboxylate, etc. Zophenone UV absorber, 3- (4′-methylbenzylidene) -d, l-camphor, 3-benzylidene-d, l-camphor, urocanic acid, urocanic acid ethyl ester, 2,2′-hydroxy-5-methyl Phenylbenzotriazole, 2- (2′-hydroxy-5′-t-octylphenyl) benzotriazole, dibenzalazine, dianisoylmethane, 4-methoxy-4′-t-butyldibenzoylmethane, 5- (3,3- Dimethyl-2-norbornylidene) -3-pentan-2-one and the like.

  Examples of the lipophilic nonionic surfactant include sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, penta-2-ethylhexyl acid Sorbitan fatty acid esters such as diglycerol sorbitan, glyceryl monostearate, α, α'-oleic acid pyroglutamate glycerin, glycerin monostearate glyceryl malate, etc. or polyglycerin esters, propylene glycol monostearate, etc. Examples include propylene glycol fatty acid esters, hardened castor oil derivatives, and glycerin alkyl ethers.

  Examples of the anionic surfactant include fatty acid soaps such as sodium laurate and sodium palmitate, higher alkyl sulfates such as sodium lauryl sulfate and potassium lauryl sulfate, polyoxyethylene lauryl sulfate triethanolamine, and polyoxyethylene lauryl. Alkyl ether sulfates such as sodium sulfate, N-acyl sarcosine acids such as sodium lauroyl sarcosine, N-myristoyl-N-methyl taurine sodium, coconut oil fatty acid methyl tauride sodium, lauryl methyl tauride sodium and other higher fatty acid amide sulfones Acid salt, phosphate ester salt such as sodium polyoxyethylene oleyl ether phosphate, sodium polyoxyethylene stearyl ether phosphate, di-2-ethylhexyl Alkylbenzene sulfonates such as sodium succinate, monolauroyl monoethanolamide polyoxyethylene sodium sulfosuccinate, sulfosuccinates such as sodium lauryl polypropylene glycol sulfosuccinate, sodium linear dodecyl benzene sulfonate, triethanolamine linear dodecyl benzene sulfonate, etc. N-acyl glutamic acid such as monosodium N-lauroyl glutamate, disodium N-stearoyl glutamate, higher fatty acid ester sulfate such as coconut oil fatty acid sodium glycerol sulfate, polyoxyethylene alkyl ether carboxylate, α-olefin sulfone Acid salt, higher fatty acid ester sulfonate, secondary alcohol sulfate ester salt, higher fatty acid alkylolamide Acid ester salts, sodium lauroyl monoethanolamide succinate, N- palmitoyl aspartate, ditriethanolamine, coconut oil fatty acid collagen hydrolyzate alkali salts.

  Examples of the cationic surfactant include alkyltrimethylammonium salts such as stearyltrimethylammonium chloride and lauryltrimethylammonium chloride, dialkyldimethylammonium salts such as distearyldimethylammonium chloride, and poly (N, N′-dimethyl-3,5) chloride. , -Methylenepiperidinium), alkyl pyridinium salts such as cetyl pyridinium chloride, alkyl quaternary ammonium salts, alkyl dimethyl benzyl ammonium salts, alkyl isoquinolinium salts, dialkyl morpholinium salts, polyoxyethylene alkyl amines, alkyl amines Salt, polyamine fatty acid derivative, amyl alcohol fatty acid derivative, benzalkonium chloride, benzethonium chloride, cationic polymer, β-N-N-dimethyl-N-ethyl acrylate Nmonioechiru vinylpyrrolidone copolymer chloride.

  Examples of amphoteric surfactants include 2-undecyl-N, N, N,-(hydroxyethylcarboxymethyl) -2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy 2 Betaine amphoteric surfactants such as imidazoline-based amphoteric surfactants such as sodium salts, 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryldimethylaminoacetic acid betaine, alkylbetaines, amide betaines, sulfobetaines Agents and the like.

  Examples of the humectant include cholesteryl-12-hydroxystearate, sodium lactate, dl-pyrrolidone carboxylate, urea, diglycerin ethylene oxide / propylene oxide adduct, etc., and particularly acidic such as chondroitin sulfate and hyaluronic acid. When mucopolysaccharide is blended, it has an enhancing action on the whitening effect of alkoxysalicylic acid and / or its salt.

  Examples of thickeners include gum arabic, carrageenan, gum tragacanth, quince seed (quince), casein, sodium caseinate, dextrin, gelatin, sodium alginate, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, polyvinyl alcohol, Examples include sodium polyacrylate, carboxyvinyl polymer, guar gum, xanthan gum, magnesium aluminum silicate, bentonite, hectorite and the like.

  Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, glycerin, erythritol, trimethylolpropane, pentaerythritol, sorbitol, maltitol, diglycerin, polyethylene glycol, and the like. .

  Examples of the powder component include talc, kaolin, mica, sericite (sericite), phlogopite, synthetic mica, magnesium carbonate, calcium carbonate, aluminum silicate, silica, zeolite, barium sulfate, and calcined calcium sulfate (baked gypsum). , Calcium phosphate, fluorine apatite, hydroxyapatite, ceramic powder, metal soap (zinc myristate, calcium palmitate, aluminum stearate, etc.), inorganic powder such as boron nitride, polyamide resin powder (nylon powder), polyethylene powder, polymethacrylic acid Methyl powder, polystyrene powder, copolymer resin powder of styrene and acrylic acid, polymethysil sesquioxane powder, organic powder such as cellulose powder, titanium dioxide, zinc oxide, iron oxide (Bengara), iron titanate, yellow oxidation Iron, black oxidation , Carbon black, low-order titanium oxide, mango violet, cobalt violet, chromium oxide, ultramarine, bitumen and other inorganic pigments, titanium oxide coated mica, titanium oxide coated bismuth oxychloride, colored titanium oxide coated mica, bismuth oxychloride Pearl pigments such as fish scale foil, metal powder pigments such as aluminum powder, organic pigments such as red 201, red 202, orange 203, yellow 205, yellow 401, blue 404, red 3 and yellow 4 No., Green No. 3 and Blue No. 1 and other organic pigments such as zirconium, barium and aluminum lake, and natural pigments such as chlorophyll and β-carotene. Examples of the synthetic resin emulsion include acrylic resin emulsion and polyvinyl acetate resin emulsion.

  Amino acids include glycine, leucine, phenylalanine, tyrosine, aspartic acid, glutamic acid, sodium glutamate, arginine, histidine, lysine, cystine, cysteine, acyl sodium sarcosine (lauroyl sarcosine sodium), acyl glutamate, glutathione, pyrrolidone carboxylic acid, etc. Can be mentioned.

  Examples of the organic amine include monoethanolamine, diethanolamine, triethanolamine, morpholine, triisopropanolamine, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-methyl-1-propanol, and the like. Is mentioned.

  Others, disodium edetate, trisodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, sequestering agents such as gluconic acid, caffeine, tannin, verapamil, tranexamic acid and its derivatives, licorice extract, grabrizine , Hot water extract of fire thorn fruit, various herbal medicines, drugs such as tocopherol acetate, glycyrrhizic acid and its derivatives or salts thereof, vitamin C, magnesium ascorbate phosphate, glucoside ascorbate, arbutin, kojic acid, etc. A whitening agent, sugars such as glucose, fructose, mannose, sucrose, trehalose, and the like can be appropriately blended. Especially when vitamin E esters such as tocopherol acetate are blended, whitening of alkoxysalicylic acid and / or a salt thereof. Effect enhancement There is a use.

  The oil-in-water emulsion composition of the present invention can be provided in the form of an emulsion, cream, serum, foundation, makeup base, etc., and is not particularly limited. For example, it may be provided as a liquid skin cosmetic, or may be provided in a form impregnated in a support such as cotton.

  The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto. Unless otherwise specified, the amount is shown in mass%.

Examples 1-4 and Comparative Examples 1-3
An oil-in-water emulsified cosmetic was prepared according to the formulation shown in Table 1 below. Next, the characteristics of each oil-in-water emulsified cosmetic prepared were evaluated. The results are also shown in Table 1. Evaluation items are viscosity, non-stickiness, firmness, usability of long-lasting effect, stability over time, and whitening effect. Viscosity was measured with a B-type viscometer at 30 ° C. (measured 1 day after production) rotor No. The measurement was performed under conditions of 3, 12 rpm. The evaluation methods for other items are shown below.

(No stickiness)
Twenty expert panels evaluated the non-stickiness after application to the skin.
○ (Good): 15 or more panels evaluated as non-sticky △ (Slightly bad): 8 or more panels evaluated as non-sticky x 14 (No): 7 panels evaluated as non-sticky Below

(Feeling firm)
Twenty professional panels evaluated the feeling of elasticity after application to the skin.
○ (good): 15 or more panel evaluated as having a feeling of stickiness △ (somewhat poor): 8 or more panel having been evaluated as having a feeling of sticking × (defect): evaluated as having a feeling of stickiness 7 or fewer panels

(Sustained effect)
Twenty expert panels evaluated the sustainability of the effect.
○ (Good): 15 or more panels evaluated to maintain the effect △ (Slightly poor): 8 to 14 panels evaluated to maintain the effect × (Poor): 7 panels evaluated to maintain the effect Below

(Stability over time)
Samples were stored at 50 ° C. for 3 months and their stability was evaluated.
○ (good): There is no change in appearance, and the decrease and increase in viscosity are less than 25% compared to the initial stage.
Δ (slightly poor): Slight oil floating at the gas-liquid interface or / and viscosity decrease / increase of 25% or more and less than 50% are observed.
X (defect): Separation and a decrease or increase in viscosity of 50% or more are observed.

(Whitening effect)
The whitening effect was evaluated by 20 specialist panels.
○ (good): 15 or more panels evaluated as having a whitening effect △ (somewhat poor): 8 or more 14 panels evaluated as having a whitening effect × (defect): evaluated as having a whitening effect 7 or fewer panels

* 1) Polyoxyethylene (2) behenyl ether

  As is apparent from the results shown in Table 1, in Comparative Examples 1 and 2 that do not contain a whitening agent, the whitening effect is naturally not obtained, but 0.5% by mass of a semi-solid oil (Vaseline) was blended. The comparative example 2 was excellent in the firmness feeling and the sustained feeling of the effect by the comparative example 1 which does not contain it. On the other hand, Comparative Example 3 containing 10% by mass of semi-solid oil (Vaseline and macadamia nut oil phytosteryl) gives a firm feeling and a long-lasting effect, but causes stickiness and inferior stability over time. became. On the other hand, the emulsified composition of the present invention (Examples 1 to 4) had satisfactory characteristics in all of usability, stability and whitening effect.

Hereinafter, other examples of the present invention will be described.
In addition, when the same characteristic evaluation as described above was performed for the following examples, excellent results were obtained in all cases.

Example 5: Emulsion blending component Blending amount (% by mass)
Purified water Residual glycerin 10
Ethanol 5
Butylene glycol 4
Dipropylene glycol 4
Xanthan gum 0.1
BEHENETH-20 1.4
Behenyl alcohol 1.4
Batyl alcohol 0.8
Hardened oil 1
Glyceryl tri-2-ethylhexanoate 6
Squalane 3
Methyl polysiloxane 1
Vaseline 1
Potassium 4-methoxysalicylate 1
Paraben 0.2
Perfume

Production method:
The oil-soluble component was dissolved in the oil and then heated to 70 ° C. (oil phase). On the other hand, the water-soluble component was dissolved in purified water and heated to 70 ° C. (aqueous phase). The above oil phase was added to the aqueous phase, mixed with stirring, and then cooled to room temperature.

Example 6: Latex blending component Blending amount (% by mass)
Purified water Residual ethyl alcohol 3
Glycerin 10
Butylene glycol 5
Dipropylene glycol 5
Xylitol 3
Carboxyvinyl polymer 0.1
Xanthan gum 0.05
Potassium hydroxide 0.4
Behenez-20 1.5
Behenyl alcohol 1
Batyl alcohol 0.5
Macadamia nut oil phytosteryl 1
Cetyl ethylhexanoate 8
Hydrogenated polydecene 3
Methyl polysiloxane 3
Ascorbyl glucoside 2
Phenoxyethanol 0.5
Perfume

Production method:
The oil-soluble component was dissolved in the oil and then heated to 70 degrees (oil phase). On the other hand, the water-soluble component was dissolved in purified water and heated to 70 ° C. (aqueous phase). After adding the above-mentioned oil phase to this water phase and stirring and mixing, the mixture was cooled to room temperature to obtain an emulsion.

Example 7: Cosmetic liquid blending component Blending amount (mass%)
Purified water Residual ethyl alcohol 3
Glycerin 8
Butylene glycol 5
(Acrylic acid / alkyl acrylate (C10-30)) copolymer 0.1
Aminomethylpropanediol 0.05
BEHENETH-20 0.8
Behenyl alcohol 1.5
Batyl alcohol 0.5
Pentaerythrityl tetraethylhexanoate 8
Methyl polysiloxane 1
Vaseline 1
Tetra (behenic acid / benzoic acid / ethylhexanoic acid)
Pentaeri slit 0.5
Potassium 4-methoxysalicylate 1
Tranexamic acid 1
Phenoxyethanol 0.35
Perfume

Production method:
The oil-soluble component was dissolved in the oil and then heated to 70 degrees (oil phase). On the other hand, the water-soluble component was dissolved in purified water and heated to 70 ° C. (aqueous phase). The oil phase described above was added to this water phase, and the mixture was stirred and mixed, and then cooled to room temperature to obtain a cosmetic liquid.

Claims (7)

An oil-in-water emulsified composition containing at least one salt-type whitening agent in an aqueous phase,
(A) one or more selected from higher alcohols having 14 to 22 carbon atoms;
(B) one or more selected from hydrophilic polyoxyethylene alkyl ethers;
(C) one or more selected from glycerin monoalkyl ethers;
(D) 0.1 to 5% by mass of a semi-solid oil component,
The alkyl part of (b) and (c) is a linear saturated alkyl chain, and the molar concentration of (a) to (c) is [(b) + (c)] / (a) = 0. An oil-in-water type emulsified cosmetic satisfying the relationship of 1 to 1.0 and having a viscosity of 1500 to 10,000 mPa · s at 30 ° C. The oil-in-water emulsified cosmetic according to claim 1, wherein the alkyl part of (a) the higher alcohol is a linear saturated alkyl chain. The molar concentration of (a) to (c) satisfies a relationship of [(b) + (c)] / (a) = 0.1 to 0.9. Oil-in-water emulsified cosmetic. (C) Glycerin monoalkyl ether is glycerin monostearyl ether, The oil-in-water emulsion cosmetic as described in any one of Claim 1 to 3 characterized by the above-mentioned. (B) The oil-in-water emulsified cosmetic according to any one of claims 1 to 4, wherein the polyoxyethylene chain of polyoxyethylene alkyl ether has an average number of added moles of 10 to 30. The molar concentration of (a) to (c) satisfies the relationship of [(a) + (c)] / (b) = 3 to 20, according to any one of claims 1 to 5, The oil-in-water emulsified cosmetic described. The oil-in-water emulsified cosmetic according to any one of claims 1 to 6, wherein the salt whitening agent is selected from potassium 4-methoxysalicylate and ascorbic acid-2-glycoside.