JP6296437B2 - Emulsified cosmetic and method for producing the same - Google Patents

Description

  The present invention relates to emulsified cosmetics such as creams and emulsions and a method for producing the same.

  Emulsified cosmetics that contain an oily component and an aqueous component and are emulsified with a surfactant (emulsifier) are widely used as creams and emulsions. In order to obtain a stable emulsion that can be used as a cosmetic, a large amount of a surfactant is generally required. However, the addition of a large amount of surfactant not only often reduces the good feeling when used as a cosmetic, that is, the so-called feeling of use, but also causes irritation to the skin and safety.

  For example, when an ionic surfactant is used, irritation to the skin often becomes a problem, and safety may also be a problem. When nonionic surfactants are used, it is said that problems such as irritation to the skin and safety are relatively small, so there are various methods for obtaining emulsions using nonionic surfactants. Proposed. However, even in this case, the current situation is not a fundamental solution to the above problem.

  In Patent Document 1, a hydrophilic nonionic surfactant is added to a water-soluble solvent as a method for obtaining a stable emulsion while using a nonionic surfactant while reducing the amount used. A method of adding water (non-aqueous emulsification method) after adding an oil phase to prepare an oil-in-water emulsion in a water-soluble solvent has been proposed. According to this method, it is said that an oil-in-water emulsion having excellent emulsification stability and having a stable emulsified state for a long period of time can be obtained.

Japanese Patent Laid-Open No. 51-55783

  By using the non-aqueous emulsification method described in Patent Document 1 and the like, the amount of surfactant used can be reduced, skin irritation can be reduced, and the feeling of use can be improved. However, in recent years, for skin cosmetics and the like, there has been a demand for further improved usability, safety, and reduction of skin irritation. Depending on the emulsified cosmetics using conventional surfactants, there are recent requests. It was insufficient to satisfy. Therefore, an emulsified cosmetic material that is superior in feeling of use and safety has been desired.

  It is an object of the present invention to provide an emulsified cosmetic composition having a stable feeling of use and having an excellent feeling of use and a method for producing the same, comprising a stable emulsion of an oily component and an aqueous component.

  As a result of intensive studies in view of the above circumstances, the present inventor uses 3-O-glyceryl-2-O-tetradecylascorbic acid, which is an ascorbic acid derivative, as a compound for emulsifying an oily component and an aqueous component. A stable emulsion with improved safety and improved skin irritation can be obtained, and as a result, a safe emulsified cosmetic having a better feeling of use and a medicinal effect as a vitamin C derivative can be obtained. I found it.

  The present inventor also uniformly mixed 3-O-glyceryl-2-O-tetradecylascorbic acid with alkylene glycol and glycerin, added the resulting solution to the oil component and mixed, and further added the aqueous component. By using a small amount of ascorbic acid derivative, an emulsion cosmetic comprising a stable emulsion despite being free of surfactant and free of surfactant. It was found that can be manufactured. The present invention has been completed based on these examination results.

  In the first aspect of the present invention, 1 part by mass of 3-O-glyceryl-2-O-tetradecylascorbic acid, 20 to 200 parts by mass of an oil component, and an aqueous component at least 1 part by mass of the oil component are contained. It is an emulsion (emulsion) obtained by mixing, wherein the content of 3-O-glyceryl-2-O-tetradecylascorbic acid is 0.01 to 2% by mass. .

  3-O-glyceryl-2-O-tetradecylascorbic acid is a compound represented by the following structural formula (I).

  In the emulsified cosmetic of the present invention, 3-O-glyceryl-2-O-tetradecylascorbic acid acts as a compound for stably mixing and dispersing the oily component and the aqueous component. The content of 3-O-glyceryl-2-O-tetradecylascorbic acid may be small. That is, the content may be 0.01% by mass or more of the emulsified cosmetic. With such a small amount of content, it is possible to obtain a stable emulsion containing an oily component that is 200 times by mass.

  3-O-glyceryl-2-O-tetradecyl ascorbic acid is one type of ascorbic acid derivative. Ascorbic acid and ascorbic acid derivatives are widely used in cosmetics and quasi drugs as highly safe compounds. Furthermore, it is also known as a medicinal active ingredient such as a whitening action, an action for conditioning the skin, and an action for suppressing acne.

  By containing 3-O-glyceryl-2-O-tetradecylascorbic acid, emulsification can be performed without using a conventional surfactant. As a result, it is possible to obtain a surfactant-free cosmetic that is excellent in safety and has the medicinal properties of an ascorbic acid derivative without deteriorating the feeling of use of the cosmetic. Moreover, since the usage-amount of an expensive ascorbic acid derivative can be suppressed by making content small, the cost of cosmetics can also be suppressed.

  The content of 3-O-glyceryl-2-O-tetradecylascorbic acid is 2% by mass or less of the cosmetic and 5% by mass or less of the oily component (1 part by mass or less with respect to 20 parts by mass of the oily component). ). When this content exceeds 2% by mass of the cosmetic or exceeds 5% by mass of the oily component, the feeling of use of the cosmetic is likely to deteriorate, which is not preferable. Further, even if the content is increased beyond the above range, an excellent emulsification effect cannot be obtained, which is not preferable in terms of increasing the cost of cosmetics. A more preferable range of the content of 3-O-glyceryl-2-O-tetradecylascorbic acid is 0.1% by mass or more and 0.5% by mass or less of the cosmetic from the viewpoint of cost effectiveness.

Examples of oil components include linseed oil, camellia oil, macadamia nut oil, corn oil, mink oil, olive oil, avocado oil, sasanqua oil, castor oil, saflower 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, triglycerin, etc. Natural liquid oil,
Solid fats and oils such as cacao butter, palm oil, palm oil, palm kernel oil, beef tallow, pork tallow, sheep tallow, horse tallow, hardened oil, hardened castor oil, owl, shea butter,
Octanoic acid esters such as beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ibota wax, whale wax, montan wax, nukarou, lanolin, reduced lanolin, hard lanolin, kapok wax, sugarcane wax, jojoba wax, shellac wax, etc. , Lauric acid esters such as hexyl laurate, isopropyl myristate, myristic acid esters such as octyldodecyl myristate, palmitic acid esters such as octyl palmitate, stearic acid esters such as isocetyl stearate, isostearic acid esters such as isopropyl isostearate , Isopalmitate such as octyl isopalmitate, oleate such as isodecyl oleate, and diisopropyl adipate such as diisopropyl adipate Steal, disestearyl malate such as diethyl sebacate, diisostearyl malate, glyceryl tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, succinic acid-2-ethylhexyl, glyceryl trioctanoate, tetraoctane Ester oil liquid paraffin such as acid pentaerythritol, glycerin triisopalmitate, ozokerite, squalane, squalene, pristane, paraffin, isoparaffin, ceresin, petrolatum, microcrystalline wax and other hydrocarbon oils dimethylpolysiloxane, methylphenylpolysiloxane, Chain silicone such as methyl hydrogen polysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane Benzoic acid UV absorbers such as para-aminobenzoic acid, cyclic oils such as cyclic silicones, anthranilic acid UV absorbers such as methyl anthramylate, salicylic acid UV absorbers such as octyl salicylate, phenyl salicylate, homomethyl salicylate, para Isopropyl methoxycinnamate, octyl paramethoxycinnamate, 2-ethylhexyl paramethoxycinnamate, glyceryl mono-2-ethylhexanoate diparamethoxycinnamate, [4-bis (trimethylsiloxy) methylsilyl-3- Methylbutyl] -3,4,5-trimethoxycinnamic acid ester and other cinnamic acid-based UV absorbers, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone- 5-sulfonic acid, Benzophenone ultraviolet absorbers such as sodium 2-hydroxy-4-methoxybenzophenone-5-sulfonate, urocanic acid, ethyl urocanate, 2-phenyl-5-methylbenzoxazole, 2- (2′-hydroxy-5 ′ -Methylphenyl) benzotriazole, 4-tert-butyl-4'-methoxybenzoylmethane UV absorbers such as henic acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, docosahexaenoic acid (DHA), higher fatty acids such as eicosapentaenoic acid (EPA), linear alcohols such as lauryl alcohol, stearyl alcohol, cetyl alcohol, cetostearyl alcohol, monostearyl glycerin ether, lanolin alcohol, cholesterol, phytoste Lumpur, may be mentioned higher alcohols such as branched chain alcohols such as octyldodecanol.

As an aqueous component, in addition to purified water,
Polyethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, hexylene glycol, glycerin, diglycerin, xylitol, maltitol, maltose, erythritol, trehalose, D-mannitol, water candy, glucose, fructose, lactose Humectants such as sodium chondroitin sulfate, sodium hyaluronate, sodium adenosine phosphate, sodium lactate, bile salt, pyrrolidone carboxylate, glucosamine, cyclodextrin,
Sequestering agents such as alanine, sodium edetate, phosphoric acid, etidronic acid,
Neutralizing agents such as 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, potassium hydroxide, sodium hydroxide, triethanolamine, sodium carbonate,
Mention may be made of pH adjusters such as lactic acid, citric acid, glycolic acid, succinic acid, tartaric acid, dl-malic acid, potassium carbonate, sodium hydrogen carbonate, ammonium hydrogen carbonate.

  Content of an aqueous component is 1 mass times or more of an oil-based component. When the content of the aqueous component is less than 1 mass times that of the oil component, the emulsified state becomes insufficient and the possibility of separation occurs. The content of the aqueous component is preferably 60% by mass or more and 95% by mass or less of the cosmetic, and in this range, the emulsion stability is further improved.

  Moreover, it is possible to improve the temporal stability of an emulsion by mix | blending a thickener. Thickeners include gum arabic, gum tragacanth, cablo gum, guar gum, pectin, agar, quince seed, starch, alge colloid, xanthan gum, dextran, succinoglucan, collagen, gelatin, casein, albumin, carboxymethyl starch, methylcellulose, ethylcellulose , Methyl hydroxypropyl cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, hydroxypropyl cellulose, nitrocellulose, sodium cellulose sulfate, sodium carboxymethyl cellulose, sodium arginate, polyvinyl methyl ether, carboxyvinyl polymer, sodium polyacrylate, polyethylene acrylate, polyacrylamide, List cationic polymers Can.

  The emulsified cosmetic of the present invention is used as, for example, a cream or an emulsion. And it can be set as various functional cosmetics by using the chemical | medical agent and compound which show | plays various effect | actions as the oil-based component and an aqueous component.

  Here, the cream is an oil-in-water emulsified high viscosity preparation. An emulsion is a fluid formulation of oil-in-water emulsification. The oily component constituting the cream or emulsion can be selected, for example, from the compounds exemplified as the oily component, and the aqueous component can be selected from the compounds exemplified as the aqueous component. it can.

The second aspect of the present invention is:
A step of preparing a solution A by uniformly mixing 1 part by mass of 3-O-glyceryl-2-O-tetradecylascorbic acid, 1 to 20 parts by mass of alkylene glycol and 10 to 100 parts by mass of glycerin;
While stirring the solution A, adding 20 to 200 parts by mass of an oil component and mixing to obtain an oil mixture, and adding the oil component to the oil mixture at least 1 mass times the oil component A method for producing an emulsified cosmetic comprising mixing and obtaining an emulsion containing 0.01 to 2% by mass of the 3-O-glyceryl-2-O-tetradecylascorbic acid.

  The emulsified cosmetic which is the first aspect of the present invention can be produced by the method for producing the emulsified cosmetic of the second aspect of the present invention. In this production method, 3-O-glyceryl-2-O-tetradecylascorbic acid, which is an ascorbic acid derivative, is uniformly mixed with a predetermined amount of alkylene glycol and glycerin, and then a solution obtained by uniform mixing is prepared. The oily component is added.

  As the alkylene glycol, those having about 2 to 10 carbon atoms are preferable, and specific examples include ethylene glycol, propylene glycol, butylene glycol and the like.

  The usage-amount of alkylene glycol is 1-20 mass parts with respect to 1 mass part 3-O-glyceryl-2-O-tetradecyl ascorbic acid. If it is less than 1 part by mass, emulsification may not be possible depending on the combination of other compounding components. On the other hand, when the amount exceeds 20 parts by mass, the temporal stability may be lowered.

  The amount of glycerin used is 1-1000 parts by mass with respect to 1 part by mass of 3-O-glyceryl-2-O-tetradecylascorbic acid. If it is less than 1 part by mass, emulsification may not be possible depending on the combination of other compounding components. On the other hand, when it exceeds 1000 parts by mass, the temporal stability may be lowered. More preferably, it is the range of 10-100 mass parts.

  The solution A may further contain the oil component.

  After 1 part by weight of 3-O-glyceryl-2-O-tetradecylascorbic acid, 1 to 20 parts by weight of alkylene glycol and 1 to 1000 parts by weight of glycerin are uniformly mixed, the solution A is obtained. While stirring the solution A, 20 to 200 parts by mass of an oil component is added and mixed to obtain an oily mixture. In order to obtain a more uniformly mixed and stable emulsion, it is preferable to add 20 to 200 parts by mass of an oily component separately to the solution A. That is, after adding 2 to 10 parts by mass of an oil component and mixing and homogenizing, the operation of adding 2 to 10 parts by mass of the oil component and mixing and homogenizing is repeated until the total amount is 20 to 200 parts by mass. The method of adding the oily component is preferred. Or you may add an oil-based component continuously for a long time, maintaining a uniform state of a system.

  After the oily mixture is obtained, an aqueous component is added to the oily mixture and mixed to obtain an emulsion that constitutes the emulsified cosmetic of the present invention.

  The emulsified cosmetic of the present invention comprises a stable emulsion of an oily component and an aqueous component, and contains a small amount of an ascorbic acid derivative with low safety concerns. It is an emulsified cosmetic with excellent safety and excellent usability. Moreover, this emulsified cosmetic can be produced by the method for producing an emulsified cosmetic of the present invention.

  Next, specific modes for carrying out the present invention will be described by way of examples. However, the scope of the present invention is not limited by the following examples.

Synthesis Example 1 Synthesis of 3-O-glyceryl ascorbic acid and 3-O-glyceryl-2-O-tetradecyl ascorbic acid In an argon atmosphere, water was mixed with L-ascorbic acid (300 g) and sodium hydrogen carbonate (42.9 g). After stirring at room temperature for 30 minutes, glycidol (126 g) was added. Thereafter, the mixture was heated to 50 ° C. and stirred for 5 hours. Methanol was added and filtered, the filtrate was concentrated under reduced pressure, and 457 g of the resulting residue was subjected to silica gel column chromatography. Elution was performed with chloroform / methanol / water = 65/35/5, and concentration was performed under reduced pressure to obtain 3-O-glyceryl ascorbic acid (296 g).

The obtained product was subjected to high resolution mass spectrometry, infrared absorption spectrum, ¹ H-NMR, ¹³ C-NMR measurement, and from this measurement result, this product was 3-O-glyceryl ascorbine having the following structural formula. It was confirmed to be an acid.

In this structural formula, a carbon atom and a hydrogen atom bonded to the carbon atom are omitted. For example, positions 1 to 4 in this formula are carbon, positions 6, 7, and 9 are CH ₂ groups, and positions 5 and 8 are CH groups. In the above structural formula (I) and the following structural formulas, similarly to this formula, hydrogen atoms and carbon atoms are omitted.

  Under an argon atmosphere, 3-O-glyceryl ascorbic acid (54.1 g) obtained above was stirred in DMSO (200 mL), sodium hydrogen carbonate (18.5 g) was further added, and the mixture was stirred at room temperature for 30 minutes. . Thereafter, tetradecyl bromide (70.1 g) was added, the mixture was heated to 100 ° C., stirred for 3 hours, and extracted with ethyl acetate. The extract was dried over anhydrous sodium sulfate and concentrated under reduced pressure. 141 g of the obtained residue was subjected to silica gel column chromatography. Elution was performed with a mixed solution of chloroform / methanol / water = 20/3 / 0.4, and concentration was performed under reduced pressure to obtain 3-O-glyceryl-2-O-tetradecylascorbic acid (50.2 g).

In addition, about the obtained product, the measurement result of a high resolution mass spectrometry, an infrared absorption spectrum, < ¹ > H-NMR, and / or < ¹³ > C-NMR is shown below.

¹ H-NMR (500 MHz, CD ₃ OD): δ 0.89 (3H, t), 1.28 (20H, brs), 1.41 (2H, m), 1.70 (2H, m), 3 .60 (2H, brd), 3.65 (2H, m), 3.90 (1H, m), 3.91 (1H, m), 4.02 (1H, m), [1H, 4.47 (Dd) /4.48 (dd)], [1H, 4.57 (dd) /4.59 (dd)], [4.858 (d) /4.860 (d), 1H]
¹³ C-NMR (125 MHz, CD ₃ OD): δ 14.4, 23.7, 27.0, 30.80, 30.48, 30.51, 30.72, 30.76, 30.80, 33 .1, 63.2, 63.56, 63.59, 70.5, 70.6, 71.5, 71.6, 74.0, 74.1, 76.7, 123.27, 123.30 , 159.23, 159.25, 172.2

Example 1 Cream No. 1 shown in Table 1. The raw materials 1 to 3 are mixed while being heated and dissolved uniformly. While stirring the homogeneous mixture (solution A), When 4 raw materials (squalane) are added in 10 portions and mixing is repeated, a soft gel-like product is obtained. Let this gel-like thing be A phase.
No. shown in Table 1. 5-13 raw materials are uniformly mixed and dispersed to obtain a B phase (aqueous phase).
Phase B is slowly added to phase A while stirring and mixing to emulsify.
After confirming emulsification and homogenization, no. 14 raw materials (potassium hydroxide 10% aqueous solution) are added, mixed with stirring and neutralized to obtain an emulsion 1.

Example 2 Cream No. 2 shown in Table 2. 1 to 5 raw materials are mixed while being heated to 80 ° C. and uniformly dissolved. While maintaining the temperature at 70 ° C. or higher and stirring the homogeneous mixture (solution A), 6 raw materials (squalane) are added in 10 portions and mixing is repeated. When the addition is completed, the mixture is cooled to 30 ° C. with stirring to obtain a soft gel. Let this gel-like thing be A phase.
No. shown in Table 2 7 to 16 raw materials are uniformly mixed and dispersed to obtain B phase (aqueous phase).
Phase B is slowly added to phase A while stirring and mixing, and emulsified.
After confirming emulsification and homogenization, no. 17 raw materials (potassium hydroxide 10% aqueous solution) are added, mixed with stirring and neutralized to obtain an emulsion 2.

Example 3 Cream No. shown in Table 3 The raw materials 1 to 3 are mixed while being heated and dissolved uniformly. While stirring the homogeneous mixture (solution A), When 4 and 5 raw materials (olive oil and ethylhexyl palmitate) are added in 10 portions and mixing is repeated, a soft gel is obtained. Let this gel-like thing be A phase.
No. shown in Table 3 6 to 15 raw materials are uniformly mixed and dispersed to obtain B phase (aqueous phase).
Phase B is slowly added to phase A while stirring and mixing to emulsify.
After confirming emulsification and homogenization, no. 16 raw materials (potassium hydroxide 10% aqueous solution) are added, mixed by stirring and neutralized to obtain an emulsion 3.

Example 4 Emulsion No. shown in Table 4 The raw materials 1 to 3 are mixed while being heated and dissolved uniformly. While stirring the homogeneous mixture (solution A), When 4 raw materials (squalane) are added in 10 portions and mixing is repeated, a soft gel-like product is obtained. Let this gel-like thing be A phase.
No. shown in Table 4 5-12 raw materials are uniformly mixed and dispersed to obtain a B phase (aqueous phase).
Phase B is slowly added to phase A while stirring and mixing to emulsify.
After confirming emulsification and homogenization, an emulsion 4 is obtained.

Example 5 Emulsion No. shown in Table 5. The raw materials 1 to 3 are mixed while being heated and dissolved uniformly. While stirring the homogeneous mixture (solution A), When 4 raw materials (squalane) are added in 10 portions and mixing is repeated, a soft gel-like product is obtained. Let this gel-like thing be A phase.
No. shown in Table 5 5-12 raw materials are uniformly mixed and dispersed to obtain a B phase (aqueous phase).
Phase B is slowly added to phase A while stirring and mixing to emulsify.
After confirming emulsification and homogenization, an emulsion 5 is obtained.

Example 6 Cream No. shown in Table 6 1 to 5 raw materials are mixed while being heated to 80 ° C. and uniformly dissolved. While rotating the disper and keeping the temperature at 70 ° C. or higher, the homogeneous mixture (solution A) 6 raw materials (squalane) are added in 10 portions and mixing is repeated. If it cools to 30 degreeC, stirring after completion | finish of addition, a soft gel-like thing will be obtained. Let this gel-like thing be A phase (oil phase).
No. shown in Table 2 7 to 16 raw materials are uniformly mixed and dispersed to obtain a B phase (aqueous phase).
Phase B is slowly added to phase A while stirring and mixing to emulsify.
After confirming emulsification and homogenization, no. 17 raw materials (potassium hydroxide 10% aqueous solution) are added, and mixed by stirring and neutralized to obtain an emulsion 6.

Evaluation Example 1 Evaluation of Usability, Moisturizing Feel, Elongation, and Penetration Feel About the cream of Example 6, sensory evaluation was performed by 20 panelists according to the following criteria. Regarding the feeling of use, moisturizing feeling, elongation, and penetrating feeling, the total of the evaluation points of the 20 panelists was 65 or more, and the evaluation result that all were excellent was obtained.

[Criteria]
Feeling of use:
4: Feels very comfortable when applied to the skin with a very good feeling of use.
3: Feels comfortable when applied to the skin with a good feeling of use.
2: Does not feel uncomfortable when applied to the skin.
1: Feels uncomfortable when applied to the skin.

Moisturizing feeling:
4: When applied to the skin, it feels moist and the skin is moist.
3: Feels moisturized when applied to the skin.
2: Feels slightly moist when applied to the skin.
1: When applied to the skin, the skin feels dry.

Elongation:
4: Very easy to spread on skin and can be applied smoothly to skin.
3: Easy to spread.
2: Difficult to spread, but does not feel caught when spreading.
1: Feels caught when spreading and difficult to spread.

Penetration feeling:
4: When applied to the skin, it feels as if it has penetrated immediately.
3: Feels gradually penetrating when applied to the skin.
2: Feels slightly penetrating when applied to the skin.
1: When it is applied to the skin, it feels as if it has not penetrated.

Evaluation Example 2 Safety for skin (occlusion patch test)
Using the cream of Example 6, a 20-hour occlusion patch test was conducted on 20 examiners with a test sample volume of 20 mg. When evaluation was performed according to the following evaluation criteria, the total evaluation score of the 20 examiners was 65 or more, and an evaluation result that the safety against the skin was excellent was obtained.

[Evaluation criteria]
4: There was no reaction to the skin even after 24 hours.
3: After 24 hours, mild erythema occurred.
2: After 24 hours, erythema occurred.
1: After 24 hours, erythema and edema occurred.

Evaluation Example 3 Stability (emulsified state, color)
The cosmetics of Examples 1 to 6 were stored at 5 ° C, 25 ° C, 40 ° C and 50 ° C for 3 months, respectively. The stability (emulsified state, color) at that time was evaluated according to the following criteria. The results are shown in Table 7.

Emulsified state:
○: The emulsified state was maintained.
(Triangle | delta): A water layer is confirmed slightly.
X: It separated into two layers.

Coloring:
○: No change from the color just after adjustment.
Δ: Slightly yellowed.
X: It changed to brown.

  As is clear from Table 7, none of the cosmetics of Examples 1 to 6 are cosmetics having excellent stability, and the emulsion state and color change are not observed even when stored at 50 ° C. for 3 months. is there.

Claims (4)

An emulsion (emulsion) obtained by mixing 1 part by mass of 3-O-glyceryl-2-O-tetradecylascorbic acid, 20 to 200 parts by mass of an oily component, and an aqueous component at least 1 mass times the oily component. An emulsified cosmetic, wherein the content of 3-O-glyceryl-2-O-tetradecylascorbic acid is 0.01 to 0.5 % by mass. A step of preparing a solution A by uniformly mixing 1 part by mass of 3-O-glyceryl-2-O-tetradecylascorbic acid, 1 to 20 parts by mass of alkylene glycol and 10 to 100 parts by mass of glycerin;
While stirring the solution A, adding 20 to 200 parts by mass of an oil component and mixing to obtain an oil mixture, and adding the oil component to the oil mixture at least 1 mass times the oil component A method for producing an emulsified cosmetic comprising mixing and obtaining an emulsion containing 0.01 to 0.5 % by mass of the 3-O-glyceryl-2-O-tetradecylascorbic acid.
  The method for producing an emulsified cosmetic according to claim 2, wherein the alkylene glycol is ethylene glycol, propylene glycol, or butylene glycol.   The method for producing an emulsified cosmetic according to claim 2 or 3, wherein 20 to 200 parts by mass of an oil component is added in portions of 2 to 10 parts by mass.