Oil-in-water type emulsified cosmetic composition

Abstract

To provide an oil-in-water type emulsified cosmetic composition that contains a salt of ascorbyl phosphate, which exhibits superior emulsification stability, provides excellent adhesion to the skin during facial packing, and ensures a moist feeling on the skin after facial packing, thereby making it suitable for use in pack treatment.SOLUTION: The inventors of the present invention have discovered that an oil-in-water type emulsified cosmetic composition containing components (a) synthetic stevensite, (b) sodium stearoyl methyltaurate and / or sodium stearoyl lactylate, (c) a salt of ascorbyl phosphate, (d) a chelating agent, and (e) a linear saturated higher alcohol having 16 to 22 carbon atoms exhibits superior emulsification stability, provides excellent adhesion to the skin during facial packing, and ensures a moist feeling on the skin after facial packing, thereby also making it suitable for use in pack treatment.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an oil-in-water type emulsified cosmetic containing ascorbic acid phosphate ester salt, having excellent emulsion stability, excellent adhesion to the skin during packing, excellent moist feeling of the skin after packing, and being suitable for packing treatment.

Background Art

[0002] Ascorbic acid and its derivatives are known as compounds showing efficacy and effects such as whitening action, antioxidant action, and collagen synthesis promoting action, and are formulated in pharmaceuticals, cosmetics, etc.

[0003] In particular, among ascorbic acid derivatives, ascorbic acid phosphate ester salt, which is a compound obtained by phosphorylating ascorbic acid, is stable even when dissolved in water, and is dephosphorylated by phosphatase in the skin to exhibit the function as ascorbic acid.

[0004] However, ascorbic acid phosphate ester salt is known to reduce the emulsion stability of oil-in-water type emulsified cosmetics. This is considered to be because the electric double layer present at the interface of the emulsion particles and contributing to the electrostatic repulsive force between the emulsion particles is compressed by the metal ions contained in the ascorbic acid phosphate ester salt. This phenomenon occurs more prominently with divalent metal salts such as magnesium and calcium than with monovalent metal salts such as sodium and potassium. On the other hand, divalent metal salts are more stable to heat and light and less likely to decompose than monovalent metal salts, and are widely used in pharmaceuticals, quasi-drugs, etc. that require ensuring the stability of components.

[0005] Therefore, an oil-in-water type emulsified cosmetic having excellent emulsion stability while containing ascorbic acid phosphate ester salt has been desired, and various attempts have been made so far (Patent Documents 1 to 4).

[0006] On the other hand, pack treatment is a special care carried out several times a week separately from daily skin care, and is a skin care that can provide a sense of effect that cannot be obtained in daily skin care.

[0007] Pack application methods include application types such as patch type, peel-off type, wipe-off type, and rinse-off type. The patch type involves attaching a sheet impregnated or coated with cosmetics on non-woven fabric or film to the skin, peeling it off after a certain time, and is mainly used expecting a high moisturizing effect on the skin. On the other hand, the peel-off type, wipe-off type, and rinse-off type require the user to apply the cosmetics to the skin with an appropriate thickness by themselves, and remove the cosmetics after a certain time, and are mainly used expecting to remove skin dirt that cannot be removed by daily skin care.

[0008] Furthermore, regarding the latter wipe-off type and rinse-off type pack applications, various attempts have been made to not only remove skin dirt but also impart moisturizing and tightening sensations like the patch type (Patent Documents 5 to 8).

[0009] However, there is no known water-in-oil type emulsified cosmetic that contains ascorbic acid phosphate ester salt, has excellent emulsion stability, is excellent in the adhesion to the skin during packing and the moist feeling of the skin after packing, and is also suitable for pack application.

Prior Art Documents

Patent Documents

[0010]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Patent Document 6

Patent Document 7

Patent Document 8

Summary of the Invention

Problems to be Solved by the Invention

[0011] An object of the present invention is to provide an oil-in-water type emulsified cosmetic containing ascorbic acid phosphate ester salt, having excellent emulsion stability, excellent adhesion to the skin during packing, excellent moist feeling of the skin after packing, and being suitable for packing treatment.

Means for Solving the Problems

[0012] In view of such circumstances, as a result of intensive studies, the inventor of the present application has found that an oil-in-water type emulsified cosmetic containing component (a) a synthetic stibnite represented by the general formula (1), component (b) sodium stearoyl methyl taurate and / or sodium stearoyl lactate, component (c) ascorbic acid phosphate ester salt, component (d) a chelating agent, and component (e) a linear saturated higher alcohol having 16 to 22 carbon atoms has excellent emulsion stability, excellent adhesion to the skin during packing, excellent moist feeling of the skin after packing, and is suitable for packing treatment, and has completed the present invention.

[0013] That is, the present invention provides an oil-in-water type emulsified cosmetic characterized by containing the following components (a) to (e). (a) A synthetic stibnite represented by the general formula (1) (Chemical Formula 1) Mg x Na y Si 4 O 10 (OH) 2 ·Na z (1) In the formula, x + y is less than 3, x is a number of 2 or more, y is a number of 0 to 0.1, and z is a number greater than 0 and 1.0 or less (b) Sodium stearoyl methyl taurate and / or sodium stearoyl lactate (c) Ascorbic acid phosphate ester salt (d) A chelating agent (e) Straight-chain saturated higher alcohols having 16 to 22 carbon atoms

[0014] The present invention also provides an oil-in-water type emulsified cosmetic characterized in that the component (d) chelating agent is metaphosphoric acid or its salt and / or etidronic acid or its salt.

[0015] The present invention also provides an oil-in-water type emulsified cosmetic characterized by containing components (a) to (e) and component (f) sucrose fatty acid ester.

Effect of the Invention

[0016] The oil-in-water type emulsified cosmetic of the present invention contains ascorbic acid phosphate salt, is excellent in emulsion stability, excellent in the feeling of adhesion to the skin during packing and the moist feeling of the skin after packing, and is suitable for packing treatment. Hereinafter, each constituent component will be described in detail.

Best Mode for Carrying Out the Invention

[0017] The synthetic stibnite of component (a) of the present invention is in the same track as synthetic hectorite and synthetic saponite from the viewpoint of magnesium silicate hydrate belonging to smectite. However, in the synthetic stibnite used in the present invention, the alkali metal part in the layer is sodium, and the total number of atoms of magnesium and sodium in the layer is less than 3, while in synthetic hectorite, the alkali metal part in the layer is lithium, and the total number of atoms of magnesium and lithium in the layer is 3, and a difference is recognized.

[0018] In addition, synthetic saponite contains aluminum in the alkali metal part in the layer, and the total number of atoms of magnesium and aluminum in the layer is 3, and a difference is recognized.

[0019] The synthetic stibnite of component (a) of the present invention may be any as long as it is usually used in cosmetics. In particular, it is preferably obtained in a form that does not contain impurity metal components and is a white powder having a general Hunter whiteness of 80% or more.

[0020] The content of component (a), the synthetic stibene site, of the present invention is not particularly limited, but it is preferably contained in an amount of 0.5 to 3% by weight based on the total amount of the oil-in-water emulsified cosmetic. If it is less than 0.5% by weight, the thickening effect of the emulsion is poor, and coarsening of the emulsion particles and a decrease in emulsion stability may occur. On the other hand, if it exceeds 3% by weight, the dispersibility of the synthetic stibene site deteriorates, and a decrease in emulsion stability and a decrease in the feeling of adhesion to the skin during packing may occur.

[0021] Component (b) of the present invention, sodium stearoyl methyl taurine and / or sodium stearoyl lactate, are both anionic surfactants. These components may be used alone or in combination of two. As commercially available products, sodium stearoyl lactate (manufactured by Musashino Chemical Laboratory Co., Ltd.), NIKKOL SMT (manufactured by Nikko Chemicals Co., Ltd.), etc. can be used. From the viewpoint of emulsion stability, sodium stearoyl methyl taurine is preferred.

[0022] The content of component (b), sodium stearoyl methyl taurine and / or sodium stearoyl lactate, of the present invention is not particularly limited, but it is preferably contained in an amount of 0.1 to 0.5% by weight based on the total amount of the oil-in-water emulsified cosmetic. If it is less than 0.1% by weight or exceeds 0.5% by weight, coarsening of the emulsion particles and a decrease in emulsion stability may occur.

[0023] Examples of component (c), ascorbic acid phosphate salts, of the present invention include sodium ascorbic acid phosphate, potassium ascorbic acid phosphate, magnesium ascorbic acid phosphate, calcium ascorbic acid phosphate, etc. Among them, from the viewpoint of ensuring the stability of the components, magnesium ascorbic acid phosphate and calcium ascorbic acid phosphate, which are divalent metal salts, are suitable, and magnesium ascorbic acid phosphate is particularly suitable.

[0024] Although the content of component (c) ascorbic acid phosphate ester salt of the present invention is not particularly limited, it is preferably contained in an amount of 0.5 to 5% by weight based on the total amount of the oil-in-water emulsion cosmetic. If it is less than 0.5% by weight, various efficacy effects of ascorbic acid phosphate ester salt cannot be fully exerted, and it is possible to obtain an oil-in-water emulsion cosmetic with high emulsion stability without using the present invention. In addition, the moist feeling of the skin after application may decrease. On the other hand, if it exceeds 5% by weight, coarsening of emulsion particles and a decrease in emulsion stability may occur.

[0025] Examples of the chelating agent as component (d) of the present invention include metaphosphoric acid or its salts, pyrophosphoric acid or its salts, polyphosphoric acid or its salts, phytic acid or its salts, edetic acid or its salts, etidronic acid or its salts, etc. These components may be used alone or in combination of two or more. From the viewpoint of emulsion stability, metaphosphoric acid or its salts, phytic acid or its salts, etidronic acid or its salts are preferred, and metaphosphoric acid or its salts, etidronic acid or its salts are more preferred.

[0026] Although the content of the chelating agent as component (d) of the present invention is not particularly limited, it is preferably contained in an amount of 0.05 to 0.3% by weight based on the total amount of the oil-in-water emulsion cosmetic. If it is less than 0.05% by weight or exceeds 0.3% by weight, coarsening of emulsion particles and a decrease in emulsion stability may occur.

[0027] Examples of the straight-chain saturated higher alcohol having 16 to 22 carbon atoms as component (e) of the present invention include cetyl alcohol, stearyl alcohol, behenyl alcohol, etc. These components may be used alone or in combination of two or more. Also, a mixture of two or more selected from these such as hydrogenated rapeseed oil alcohol can be used. As commercially available products, cetyl alcohol NX, stearyl alcohol NX, behenyl alcohol, alcohol No. 20-B (manufactured by Kao Alcohol Co., Ltd.) etc. can be used. From the viewpoint of emulsion stability, behenyl alcohol and hydrogenated rapeseed oil alcohol are preferred, and hydrogenated rapeseed oil alcohol is more preferred.

[0028] The content of the linear saturated higher alcohol with 16 to 22 carbon atoms as component (e) of the present invention is not particularly limited, but it is preferably contained in an amount of 1 to 6% by weight based on the total amount of the oil-in-water type emulsified cosmetic. If it is less than 1% by weight, deterioration in usability such as a decrease in emulsion stability, a decrease in the feeling of adhesion to the skin during packing, and a decrease in the moist feeling of the skin after packing may occur. On the other hand, if it exceeds 6% by weight, the viscosity or hardness of the oil-in-water type emulsified cosmetic may become too high, and thus problems may occur in emulsion stability.

[0029] In addition, the oil-in-water type emulsified cosmetic of the present invention has the above components (a) to (e) as essential components, but it is preferably further contained with sucrose fatty acid ester as component (f).

[0030] Examples of the sucrose fatty acid ester as component (f) of the present invention include sucrose laurate, sucrose dilaurate, sucrose myristate, sucrose palmitate, sucrose stearate, sucrose distearate, sucrose pentahydroxystearate, and the like. These components may be used alone or in combination of two or more. As commercially available products, Surfhope SE Cosme C-1205, Surfhope SE Cosme C-1216, Surfhope SE Cosme C-1616, Surfhope SE Cosme C-1805, Surfhope SE Cosme C-1816 (manufactured by Mitsubishi Chemical Corporation), Cosmerike S-10 (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Crodetta 5-HS (manufactured by Croda Japan Co., Ltd.), and the like can be used. From the viewpoint of usability, sucrose distearate and sucrose pentahydroxystearate are preferred.

[0031] The content of the component (f), sucrose fatty acid ester, of the present invention is not particularly limited, but it is preferably contained in an amount of 0.1 to 0.5% by weight based on the total amount of the oil-in-water type emulsified cosmetic. If it is less than 0.1% by weight, deterioration in usability such as a decrease in the feeling of adhesion to the skin during packing or a decrease in the moist feeling of the skin after packing may occur. On the other hand, if it exceeds 0.5% by weight, a decrease in emulsion stability may occur.

[0032] The oil-in-water type emulsified cosmetic of the present invention may contain, within a range that does not impair the effects of the present invention, components other than the above components (a) to (f) that are usually used in external skin preparations such as cosmetics and pharmaceuticals as needed. The components other than the above components (a) to (f) are not particularly limited. For example, water-swellable clay minerals other than component (a), surfactants other than components (b) and (f), vitamins and / or vitamin derivatives other than component (c), chelating agents other than component (d), oil agents other than component (e), pH adjusters, moisturizing agents, aqueous components, antioxidants, beauty components, preservatives, film-forming agents, anti-fading agents, ultraviolet absorbers, defoaming agents, fragrances, plant extracts, etc. can be appropriately contained to impart various effects.

[0033] The shape of the oil-in-water type emulsified cosmetic of the present invention is not particularly limited, and a wide range of shapes from emulsion-like to cream-like are possible. Among them, from the viewpoint of usability, a cream-like shape is preferred.

[0034] Also, the use of the oil-in-water type emulsified cosmetic of the present invention is not particularly limited, and it can be used in a wide range of applications such as skin care creams and pack materials. Among them, from the viewpoint of usability, it is preferably used as a pack material.

[0035] The pack application referred to in the present invention is a method of applying the oil-in-water type emulsified cosmetic of the present invention to the skin with an appropriate thickness and then removing it by wiping or washing after a certain period of time for use.

Examples

[0036] Examples are given below to explain the present invention in more detail. Note that the present invention is not limited to the following examples. Also, the contents in the following examples and the like indicate weight % unless otherwise specified.

[0037] Prior to the examples, the effect test method used in the present invention will be described.

[0038] [Emulsion particles immediately after preparation] Regarding immediately after the preparation of the cosmetics of each example, the emulsion particles were evaluated by microscopic observation and judged according to the following criteria. (Evaluation criteria) ◎: The emulsion particle diameter is 5 microns or less and is uniform. ○: Particles with an emulsion particle diameter larger than 5 microns are mixed, but the emulsified state is maintained. ×: The emulsified state cannot be maintained and is separated.

[0039] [Emulsion stability] The cosmetics of each example were filled into glass containers and stored in a constant temperature bath at 40°C for 3 months. Regarding the state after storage, the emulsion particles were evaluated by microscopic observation and judged according to the following criteria. Note that when it was separated without being able to maintain the emulsified state immediately after preparation, the evaluation of emulsion stability was not performed. (Judgment criteria) ◎: No difference is observed from the initial state. ○: The emulsion particles have become larger, but the emulsified state is maintained. ×: The emulsion particles have become larger and are separated.

[0040] [Feeling of use] (1) Adhesion to the skin during application of the pack Twenty professional panelists applied the cosmetics of each example onto the skin with an appropriate thickness and performed a pack treatment. Regarding the feeling of adhesion to the skin at that time, it was judged in two levels of "yes" or "no" and evaluated according to the following criteria. Here, the feeling of adhesion to the skin being "yes" means that the cosmetics firmly cover the skin during the pack treatment and a feeling of skin sealing is obtained. In addition, for the cosmetics that separated without being able to maintain the emulsified state immediately after preparation, the evaluation of the usability was not performed. (Evaluation Criteria) ◎: Fifteen or more panelists judged that there was a feeling of adhesion. ○: Ten to fourteen panelists judged that there was a feeling of adhesion. △: Five to nine panelists judged that there was a feeling of adhesion. ×: Four or fewer panelists judged that there was a feeling of adhesion.

[0041] (2) Moist feeling of the skin after the pack Twenty professional panelists applied the cosmetics of each example onto the skin with an appropriate thickness and performed a pack treatment. After leaving it for 5 minutes, when the cosmetics were removed by wiping or rinsing, the moist feeling of the skin was judged in two levels of "yes" or "no" and evaluated according to the following criteria. The evaluation was carried out twice for each professional panelist, once for use by wiping and once for use by rinsing. In addition, for the cosmetics that separated without being able to maintain the emulsified state immediately after preparation, the evaluation of the usability was not performed. (Evaluation Criteria) ◎: Fifteen or more panelists judged that there was a moist feeling both for use by wiping and for use by rinsing. ○: Ten to fourteen panelists judged that there was a moist feeling both for use by wiping and for use by rinsing. △: Five to nine panelists judged that there was a moist feeling both for use by wiping and for use by rinsing. ×: Four or fewer panelists judged that there was a moist feeling both for use by wiping and for use by rinsing.

[0042] Water-in-oil emulsified cosmetics with the formulations shown in Tables 1 to 3 were prepared, and the evaluation of the emulsified particles, emulsion stability, and usability immediately after preparation was carried out according to the above criteria.

[0043] The oil-in-water type emulsified cosmetic obtained according to the formulation of Table 1 was prepared by the production method shown below. (Preparation method) Components 1 to 6 were heated to 75 to 80 °C and made uniform. Components 7 to 16 were heated to 70 °C and made uniform. Components 1 to 6 heated to 75 to 80 °C were added to components 7 to 16 heated to 80 to 85 °C and emulsified. Then it was cooled, and components 17 to 19 were added at 45 °C. Then it was cooled to 30 °C to obtain the oil-in-water type emulsified cosmetics of each example in Table 1.

[0044]

Table 1

[0045] From the results shown in Table 1, as shown in Examples 1 to 5, when containing component (a), satisfactory results were obtained in all evaluated items. Among them, particularly satisfactory results were obtained in Examples 1, 3, and 4 containing 0.5 to 3% by weight of component (a). On the other hand, as shown in Comparative Example 1, when not containing component (a), coarsening of the emulsion particles was observed immediately after preparation, and satisfactory results were not obtained. Also, as shown in Examples 1 and 6 to 9, when containing component (b), satisfactory results were obtained in all evaluated items. Among them, particularly satisfactory results were obtained in Examples 1 and 8 containing sodium stearoyl methyl taurine and having a content of 0.1 to 0.5% by weight. On the other hand, as shown in Comparative Example 4, when not containing component (b), satisfactory results were not obtained in terms of emulsion stability, adhesion to the skin during packing, and moist feeling of the skin after packing. Furthermore, as shown in Comparative Examples 2 and 3, when containing sodium stearoyl glutamate having a hydrophilic group of glutamate or sodium lauroyl methyl taurine having a hydrophobic group with 12 carbon atoms instead of component (b), satisfactory results were not obtained in terms of emulsion stability and adhesion to the skin during packing.

[0046] The oil-in-water type emulsified cosmetic obtained according to the formulation of Table 2 was prepared by the production method shown below. (Preparation method) Components 1 to 5 were heated to 75 to 80 °C and made uniform. Components 6 to 17 were heated to 70 °C and made uniform. Components 1 to 5 heated to 75 to 80 °C were added to components 6 to 17 heated to 80 to 85 °C and emulsified. Then it was cooled, and components 18 to 20 were added at 45 °C. Then it was cooled to 30 °C to obtain an oil-in-water type emulsified cosmetic of each example in Table 2.

[0047]

Table 2

[0048] From the results shown in Table 2, as shown in Examples 10 to 13, when component (c) was contained, satisfactory results were obtained in all evaluated items. Among them, particularly satisfactory results were obtained in Examples 11 and 12 containing 0.5 to 5% by weight of component (c). On the other hand, as shown in Comparative Example 5, when component (c) was not contained, satisfactory results were not obtained in the moist feeling of the skin after packing. Also, as shown in Examples 14 to 21, when component (d) was contained, satisfactory results were obtained in all evaluated items. Among them, particularly satisfactory results were obtained in Examples 15, 16, and 21 containing metaphosphoric acid or its salt, etidronic acid or its salt, and having a content of 0.05 to 0.3% by weight. On the other hand, as shown in Comparative Example 6, when component (d) was not contained, coarsening of the emulsion particles was observed immediately after preparation, and satisfactory results were not obtained.

[0049] The oil-in-water type emulsified cosmetic obtained according to the formulation in Table 3 was prepared by the following production method. (Preparation method) Components 1 to 11 were heated to 75 to 80 °C and made uniform. Components 12 to 19 were heated to 70 °C and made uniform. Components 1 to 11 heated to 75 to 80 °C were added to components 12 to 19 heated to 80 to 85 °C and emulsified. Then it was cooled, and components 20 to 22 were added at 45 °C. Then it was cooled to 30 °C to obtain an oil-in-water type emulsified cosmetic of each example in Table 3.

[0050]

Table 3

[0051] From the results shown in Table 3, as shown in Examples 22 to 27, when component (e) was contained, satisfactory results were obtained in all evaluated items. Among them, particularly satisfactory results were obtained in Examples 23 and 24 which contained hydrogenated rapeseed oil alcohol and the content thereof was 1 to 6% by weight. On the other hand, as shown in Comparative Example 8, when component (e) was not contained, coarsening of emulsion particles was observed immediately after preparation and satisfactory results were not obtained. Further, as shown in Comparative Example 7, when isostearyl alcohol having a branched hydrocarbon chain was contained instead of component (e), satisfactory results were not obtained in terms of emulsion stability and the feeling of adhesion to the skin during packing. Also, as shown in Examples 28 to 34, when component (f) was contained, satisfactory results were obtained in all evaluated items. Among them, particularly satisfactory results were obtained in Examples 29, 30, and 32 which contained sucrose distearate and sucrose pentahydroxystearate and the content thereof was 0.1 to 0.5% by weight.

[0052] In addition, the following products were used for the components shown in Tables 1 to 3. ※1: NIKKOL SS-10V (manufactured by Nikko Chemicals Co., Ltd.) ※2: Squalane (manufactured by Kishimoto Special Cod Liver Oil Industry Co., Ltd.) ※3: ODM (manufactured by Koso Alcohol Industry Co., Ltd.) ※4: Crodet 5-HS (manufactured by Croda Japan Ltd.) ※5: Alcohol No. 20-B (manufactured by Koso Alcohol Industry Co., Ltd.) ※6: Sodium stearoyl lactate (manufactured by Musashino Chemical Laboratory Co., Ltd.) ※7: Sodium metaphosphate (manufactured by Taihei Chemical Industry Co., Ltd.) ※8: Echo Gum (manufactured by MP Gokyowa Food & Chemical Co., Ltd.) ※9: NIKKOL SMT (manufactured by Nikko Chemicals Co., Ltd.) ※10: Amisoft HS-11P(F) (manufactured by Ajinomoto Co., Inc.) ※11: NIKKOL LMT (manufactured by Nikko Chemicals Co., Ltd.) ※12: Ascorbic acid PM (manufactured by Showa Denko K.K.) ※13: Sodium pyrophosphate (manufactured by Taihei Chemical Industry Co., Ltd.) ※14: Phytinic acid (manufactured by Tsukuno Food Industry Co., Ltd.) ※15: Krewat T (manufactured by Nagase Sangyo Co., Ltd.) ※16: Terminal SL (manufactured by Italmatch Japan Co., Ltd.) ※17: Surfhope SE COSME C-1805 (manufactured by Mitsubishi Chemical Corporation) ※18: Surfhope SE COSME C-1616 (manufactured by Mitsubishi Chemical Corporation) ※19: Surfhope SE COSME C-1216 (manufactured by Mitsubishi Chemical Corporation) ※20: Behenyl alcohol (manufactured by Kao Alcohol Co., Ltd.) ※21: Stearyl alcohol NX (manufactured by Kao Alcohol Co., Ltd.) ※22: Isostearyl alcohol EX (manufactured by Kao Alcohol Co., Ltd.)

[0053] Next, other examples of the present invention are shown. In both Example 35 and Example 36, satisfactory results were obtained in all evaluated items.

[0054] Example 35 Body pack material Ingredient Content (wt%) (1) Squalane ※2 8.00 (2) Diisostearyl malate 2.00 (3) Vaseline 0.50 (4) Methylphenylpolysiloxane 5.00 (5) Behenyl alcohol ※20 2.50 (6) Sorbitan sesquistearate 1.00 (7) Sucrose pentahydroxystearate ※4 0.30 (8) Purified water Balance (9) Na metaphosphate ※7 0.15 (10) Synthetic stibnite 1.20 (11) Xanthan gum ※8 0.30 (12) Sodium hyaluronate 0.01 (13) 1,3-Butylene glycol 15.00 (14) Glycerin 8.00 (15) Pentylene glycol 2.00 (16) Methylparaben 0.20 (17) Sodium stearoyl methyl taurate※9 0.20 (18) Purified water 10.00 (19) Magnesium ascorbyl phosphate※12 3.00 (20) Potassium citrate 2.00

[0055] (Preparation method) Components 1 - 7 were heated to 75 - 80°C and made uniform. Components 8 - 17 were heated to 70°C and made uniform. Components 1 - 7 heated to 75 - 80°C were added to components 8 - 17 heated to 80 - 85°C and emulsified. Then it was cooled, and components 18 - 20 were added at 45°C. Then it was cooled to 30°C to obtain an oil-in-water emulsified cosmetic of Example 35.

[0056] Example 36 Packing material Ingredients Content (wt%) (1) Hydrogenated polyisobutene 5.00 (2) Octyldodecyl myristate※3 7.00 (3) Meadowfoam oil 3.00 (4) Jojoba oil 3.00 (5) Hydrogenated rapeseed oil alcohol※5 3.50 (6) Sorbitan monostearate※1 1.30 (7) Sucrose distearate※17 0.10 (8) Purified water Remainder (9) Sodium metaphosphate※7 0.05 (10) Synthetic stibnite 2.00 (11) Xanthan gum※8 0.10 (12) Titanium oxide 1.00 (13) Sodium hyaluronate 0.10 (14) 1,3-Butylene glycol 7.50 (15) Glycerin 13.00 (16) Pentylene glycol 2.00 (17) Methylparaben 0.20 (18) Sodium stearoyl methyl taurate ※9 0.30 (19) Purified water 10.00 (20) Magnesium ascorbyl phosphate ※12 3.00 (21) Potassium citrate 2.00

[0057] (Preparation method) Components 1 to 7 were heated to 75 to 80°C and made uniform. Components 8 to 18 were heated to 70°C and made uniform. Components 1 to 7 heated to 75 to 80°C were added to components 8 to 18 heated to 80 to 85°C and emulsified. Then it was cooled, and components 19 to 21 were added at 45°C. Then it was cooled to 30°C to obtain an oil-in-water type emulsified cosmetic of Example 36.

Industrial applicability

[0058] According to the present invention, there is provided an oil-in-water type emulsified cosmetic containing an ascorbic acid phosphate ester salt, having excellent emulsion stability, excellent adhesion to the skin during packing, excellent moist feeling of the skin after packing, and suitable for packing treatment, and applicable not only to cosmetics but also to pharmaceuticals and the like.

Claims

1. The following components (a) to (e); (a) Synthetic stibnite represented by the general formula (1) (Chemical formula 1) Mg ｘ Na ｙ Si ４ O １０ (OH) ２ ·Na ｚ (1) In the formula, x + y is less than 3, x is a number of 2 or more, y is a number of 0 to 0.1, and z is a number greater than 0 and 1.0 or less (b) Sodium stearoyl methyl taurine and / or sodium stearoyl lactate (c) Ascorbic acid phosphate ester salt (d) Chelating agent (e) Linear saturated higher alcohol having 16 to 22 carbon atoms An oil-in-water type emulsified cosmetic characterized by containing the same.

2. The oil-in-water type emulsified cosmetic according to Claim 1, wherein the chelating agent as the component (d) is metaphosphoric acid or its salt, and / or etidronic acid or its salt.

3. The oil-in-water type emulsified cosmetic according to Claim 1 or 2, further characterized by containing the component (f) sucrose fatty acid ester.

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