JP6945810B2 - Emulsified cosmetics - Google Patents

Description

The present invention relates to an emulsified cosmetic containing ascorbic acid-2-phosphate in a stable manner. More specifically, ascorbic acid-2-phosphate, which is a whitening agent, is stable over time while containing hydrophobized titanium oxide and / or hydrophobized iron oxide having an ultraviolet protection effect and / or a make-up effect. Regarding emulsified cosmetics that maintain sex.

When the stimulation of ultraviolet rays from sunlight promotes the production of melanin pigments in the skin, skin pigmentation, which causes stains and freckles, occurs. Cosmetics containing whitening agents have been used to prevent such stains and freckles caused by sunburn. As the whitening agent, ascorbic acid and its salts and derivatives, which exhibit an effect of suppressing melanin pigment production and a reducing property on melanin pigment, are often used. Ascorbic acid-2-phosphate is a typical example of an ascorbic acid derivative, and is contained in many cosmetics (Patent Documents 1 to 3).

In recent years, due to the high awareness of whitening, there has been a strong demand for cosmetics having a whitening effect, such as foundations, foundations, and sunscreens, which are used during the day. In daytime cosmetics, metal oxide particles have various functions. For example, titanium oxide has a protective effect from ultraviolet rays due to a scattering action and a covering effect for skin troubles such as stains due to a hiding power, and iron oxide has a skin color correction effect and the like. In recent years, powders whose surface has been hydrophobized have been used for the purpose of improving makeup retention.

When cosmetics containing ascorbic acid-2-phosphate are stored for a long period of time, discoloration and odor from yellow to brown occur due to decomposition, and it can be said that the storage stability as cosmetics is sufficient. There wasn't. Furthermore, when a metal oxide is used in combination, there is a concern that the destabilization of ascorbic acid-2-phosphate is promoted due to the influence of surface activity, eluted ions, etc., and the whitening effect is reduced. Therefore, it has been technically difficult to use ascorbic acid-2-phosphate in combination with metal oxide particles (Patent Documents 4 to 6).

Ascorbic acid-2-phosphate is said to be stable in the neutral to alkaline range (Patent Documents 7 to 10). Further, for the purpose of further improving the storage stability of ascorbic acid-2-phosphate, a highly water-soluble organic acid having one or more carboxyl groups and one or more hydroxyl groups or one or more organic acids having 2 to 6 carbon atoms or carboxyl groups. A method of blending a molecular compound (Patent Document 11), a method of combining sodium ascorbate-2-phosphate and a salt having a divalent value or higher (Patent Document 12), and the like have been studied. However, when ascorbic acid-2-phosphate and metal oxide were used in combination in cosmetics, these methods were also not sufficient to suppress the decomposition of ascorbic acid-2-phosphate over time.

Japanese Unexamined Patent Publication No. 63-2403014 Japanese Unexamined Patent Publication No. 2-83309 Special Table 2001-511185 Japanese Unexamined Patent Publication No. 2004-51542 WO2004 / 045565 WO2013 / 018828A Japanese Unexamined Patent Publication No. 4-173727 Japanese Unexamined Patent Publication No. 2004-10612 WO2005 / 067867 Japanese Unexamined Patent Publication No. 9-315933 Japanese Unexamined Patent Publication No. 5-339123 Japanese Unexamined Patent Publication No. 9-118613

An object of the present invention is to provide an emulsified cosmetic containing a metal oxide having a UV protection effect and / or a make-up effect, while maintaining the stability of ascorbic acid-2-phosphate, which is a whitening agent. To provide.

In view of these circumstances, the inventor of the present application has conducted diligent research and found that (A) ascorbic acid-2-phosphate, (B) hydrophobized titanium oxide and / or hydrophobized iron oxide, and (C) acrylic acid / silicone. It contains a system-grafted copolymer, (D) pentahydroxystearic acid decaglycerin ester, and has a weight ratio (A) / (B) of 0.5 or more, and (E) sodium hydroxide and / or hydroxide. An emulsified cosmetic in which the hydrogen ion concentration index (pH) of the aqueous phase of the emulsified cosmetic is adjusted to 10.0 to 11.0 with an alkali metal hydroxide selected from potassium has an ultraviolet protection effect and / or a make-up effect. It has been found that the ascorbic acid-2-phosphate, which is a whitening agent, can maintain the stability over time while having it, and the present invention has been completed.

（Ｂ）疎水化処理酸化チタン及び／又は疎水化処理酸化鉄 １〜１０重量％
（Ｃ）アクリル酸／シリコーン系グラフト共重合体 ０．３〜１．５重量％
（Ｄ）ペンタヒドロキシステアリン酸デカグリセリンエステル ０．５〜２重量％
を含有し、且つ重量比（Ａ）／（Ｂ）が０．５以上であり、更に（Ｅ）水酸化ナトリウム及び／又は水酸化カリウムから選ばれるアルカリ金属水酸化物にて乳化化粧料の水相のｐＨを１０．０〜１１．０に調整したことを特徴とする乳化化粧料である。 That is, the present invention has the following components (A) to (D);
(A) Ascorbic acid-2-phosphate represented by Chemical formula 1 1-5%

(B) Hydrophobicized Titanium Oxide and / or Hydrophobized Iron Oxide 1-10% by Weight
(C) Acrylic acid / silicone-based graft copolymer 0.3 to 1.5% by weight
(D) Pentahydroxystearic acid decaglycerin ester 0.5 to 2% by weight
, And the weight ratio (A) / (B) is 0.5 or more, and (E) water for emulsifying cosmetics with an alkali metal hydroxide selected from sodium hydroxide and / or potassium hydroxide. It is an emulsified cosmetic characterized in that the pH of the phase is adjusted to 10.0 to 11.0.

The emulsified cosmetic of the present invention is an emulsified cosmetic having both an ultraviolet protection effect and / or a make-up effect and a whitening effect.

The ascorbic acid-2-phosphate represented by (A) Chemical formula 1 used in the present invention is a compound represented by Chemical formula 1 above, and is sodium ascorbic acid-2-phosphate and -2-phosphoric acid ascorbic acid. Examples thereof include, but are not limited to, magnesium acid, potassium ascorbate-2-phosphate, calcium ascorbate-2-phosphate, and ammonium ascorbate-2-ammonate. One or a combination of two or more of these ascorbic acid-2-phosphates can be used as appropriate. Among these, magnesium ascorbic acid-2-phosphate and / or sodium ascorbic acid-2-phosphate is preferable from the viewpoint of water solubility.

The content of ascorbic acid-2-phosphate represented by (A) Chemical formula 1 is preferably 1 to 5% by weight in the cosmetic. If the content is less than 1% by weight, a sufficient whitening effect cannot be obtained, and even if the content exceeds 5% by weight, not only the whitening effect cannot be expected to be improved, but also the usability such as stickiness deteriorates.

The (B) hydrophobized titanium oxide and / or hydrophobized iron oxide used in the present invention has a particle shape (spherical, needle-like, spindle-like, plate-like, amorphous, etc.) and a particle size (fine particles (less than 150 nm)). , Pigment grade (150 nm or more)), particle structure (porous, non-porous, etc.), any of them can be used. The titanium oxide can be used in any crystal structure of anatase-type titanium oxide and rutile-type titanium oxide. The iron oxide may contain only one type from black iron oxide, yellow iron oxide, red iron oxide, brown iron oxide and the like, or may contain a mixture of two or more types. Further, any of those that behave as primary particles in cosmetics and those that behave as aggregated particles after being granulated can be used.

(B) Hydrophobicized titanium oxide and / or hydrophobized iron oxide is preferably contained in an amount of 1 to 10% by weight in the cosmetic. If the content is less than 1% by weight, a sufficient UV protection effect and / or make-up effect cannot be obtained, and if it exceeds 10% by weight, the discoloration of ascorbic acid-2-phosphate represented by (A) Chemical formula 1 is not obtained. Or strange odors may occur.

(B) Hydrophobicization Treatment The method for hydrophobizing titanium oxide and / or hydrophobizing iron oxide is not particularly limited, and the treatment can be performed by a known method. For example, treatment with silicones such as hydrogen dimethylpolysiloxane, (hydrogendimethylpolysiloxane / dimethylpolysiloxane) copolymer, dimethylpolysiloxane; treatment with silane compounds such as octyltriethoxysilane and hexyltrimethoxysilane; palmitic acid. , Treatment with fatty acids such as stearic acid; fluorine treatment with perfluoroalkyltrimethoxysilane and the like. Further, the surface of these metal oxides may be coated with an inorganic compound such as silica or alumina and then hydrophobized.

(B) Specific commercial products of hydrophobized titanium oxide and / or hydrophobized iron oxide include SA-TTO-S-4 (10% dimethylpolysiloxane and 7.65% stearic acid-treated titanium oxide, fine particles. , Miyoshi Kasei Co., Ltd.), MTY-700BS (2% hydrogen dimethylpolysiloxane treated titanium oxide, fine particles, manufactured by Teika), MT-100Z (13% stearic acid treated titanium oxide, fine particles, manufactured by Teika), AS-63D (4% Hydrogen dimethylpolysiloxane treated titanium oxide, pigment grade, manufactured by Toshoku Pigment Co., Ltd.), SA-Titanium MP-1133 (2% hydrogen dimethylpolysiloxane treated titanium oxide, pigment grade, manufactured by Teika Co., Ltd.), SOLAVEIL XTP1-PW -(MV) (5% stearic acid treated titanium oxide, pigment grade, manufactured by Claude), ITT-2 TiO2 MP-1133 (2% isopropyl titanium triisostearate treated titanium oxide, pigment grade, manufactured by Teika), ITT- 5 RED R-516P (5% isopropyl titanium triisostearate treated iron oxide, pigment grade, manufactured by Daito Kasei Kogyo Co., Ltd.), ITT-2 YELLOW LL-100P (2% isopropyl titanium triisostearate treated iron oxide, pigment grade, Daito) Kasei Kogyo Co., Ltd.), ITT-2 BLACK BL-100P (2% isopropyl titanium triisostearate-treated iron oxide, pigment grade, Daito Kasei Kogyo Co., Ltd.), SAS-Black BL-100P (3.5% dimethylpolysiloxane / Hydrogen dimethyl polysiloxane treated iron oxide, pigment grade, manufactured by Miyoshi Kasei Co., Ltd.), SAS-Yellow LL-100P (3.5% dimethyl polysiloxane / hydrogen dimethyl polysiloxane treated iron oxide, pigment grade, manufactured by Miyoshi Kasei Co., Ltd.), SAS -Red R516-PS (3.5% dimethylpolysiloxane / hydrogen dimethylpolysiloxane-treated iron oxide, pigment grade, manufactured by Miyoshi Kasei Co., Ltd.) can be exemplified.

Further, the weight ratio (A) / (B) of ascorbic acid-2-phosphate represented by (A) conversion 1 to (B) hydrophobized titanium oxide and / or hydrophobized iron oxide is 0.5. Adjust as above. When the weight ratio (A) / (B) is less than 0.5, the ascorbic acid-2-phosphate represented by (A) conversion 1 is (B) hydrophobized titanium oxide and / or hydrophobized oxidation. Since there is too much iron, problems such as discoloration and odor occur.

(C) The acrylic acid / silicone-based graft copolymer has a radical weight of an organopolysiloxane compound having a radically polymerizable group at one end of the molecular chain and a radically polymerizable monomer mainly composed of acrylic acid and / or methacrylic acid. Examples thereof include (acrylic acid / dimethylpolysiloxane) copolymer, (acrylic acid / ethylhexyl acrylate / dimethylpolysiloxane methacrylate) copolymer, (acrylic acid / stearyl acrylate / dimethylpolysiloxane methacrylate) copolymer, and the like. , (Acrylic acid / dimethylpolysiloxane) copolymer is preferred. Commercially available products are (acrylic acid / dimethylpolysiloxane) copolymer (trade name: KP-545, solid content 30%, manufactured by Shin-Etsu Chemical Industry Co., Ltd.), (acrylic acid / ethylhexyl acrylate / dimethylpolysiloxane methacrylate) copolymer (commodity). Name: KP-575, solid content 30%, manufactured by Shin-Etsu Chemical Industry Co., Ltd.), (Acrylic acid / stearyl acrylate / dimethylpolysiloxane methacrylate) copolymer (trade name: KP-561P, manufactured by Shin-Etsu Chemical Industry Co., Ltd.), (acrylic acid) An example thereof is an acid / behenyl acrylate / dimethylpolysiloxane methacrylate) copolymer (trade name: KP-562P, manufactured by Shin-Etsu Chemical Industry Co., Ltd.).

The acrylic acid / silicone-based graft copolymer (C) may be contained alone or in combination of two or more. The content is preferably 0.3 to 1.5% by weight. If it is less than the lower limit, problems such as discoloration and odor of ascorbic acid-2-phosphate represented by (A) conversion 1 occur, and if it exceeds the upper limit, the film feeling becomes stronger and the usability deteriorates.

The component (D) pentahydroxystearic acid decaglyceryl ester used in the present invention has an average degree of condensation of polyglycerin of 10, and an average degree of esterification of hydroxystearic acid with respect to polyglycerin of 5. As a specific commercial product, NIKKOL Decaglin 5-HS (manufactured by Nikko Chemicals Co., Ltd.) can be exemplified.

The content of decaglyceryl pentahydroxystearate (D) is preferably 0.5 to 2% by weight. If it is less than the lower limit, emulsification cannot be performed or the stability of the emulsion over time is poor, and problems such as discoloration and odor of ascorbic acid-2-phosphate represented by (A) conversion 1 occur. If the upper limit is exceeded, the stickiness becomes severe and the usability deteriorates.

The alkali metal hydroxide selected from (E) sodium hydroxide and / or potassium hydroxide used in the present invention is used as a pH adjuster.

(E) The content of the alkali metal hydroxide selected from sodium hydroxide and / or potassium hydroxide is not particularly limited, but may be adjusted so that the pH of the aqueous phase is 10.0 to 11.0. .. By setting the pH of the aqueous phase in the range of 10.0 to 11.0, the storage stability of the ascorbic acid-2-phosphate represented by (A) Chemical formula 1 can be significantly improved. When the pH of the aqueous phase is lower than 10.0, the storage stability of ascorbic acid-2-phosphate represented by (A) conversion 1 is insufficient, and even if the pH exceeds 11.0, it is more than that. Not only is there no improvement in storage stability, but there is also concern about deterioration of emulsion stability and skin irritation.

The emulsified cosmetic of the present invention can be used for various components other than the above-mentioned components, for example, an ultraviolet absorber, a moisturizer, an aqueous component, a surfactant, an antioxidant, and a beauty product, as necessary, as long as the effects of the present invention are not impaired. Ingredients, preservatives, water-soluble polymers, film-forming agents, anti-fading agents, antifoaming agents, fragrances and the like can be appropriately contained in order to impart various effects.

Hereinafter, the present invention will be described in more detail with reference to examples. It should be noted that these do not limit the invention of the present application in any way. The content is% by weight.

Prior to Examples, the effect test method used in the present invention will be described.

[Stability by accelerated test]
(1) Stability of emulsified particles over time The cosmetics were stored for 3 months under the conditions of a temperature of 40 ° C. and a relative humidity of 75%. The emulsified particles were observed under a microscope and judged according to the following criteria.
(Evaluation criteria)
⊚: The particle size of the emulsified particles is not different from the initial state. ○: The particle size of the emulsified particles is clearly larger, but the emulsified state is maintained.

(2) Evaluation of stability of ascorbic acid-2-magnesium phosphate The cosmetics were stored for 3 months under the conditions of a temperature of 40 ° C. and a relative humidity of 75%. Quantitative analysis of preserved magnesium ascorbic acid-2-phosphate was performed using high performance liquid chromatography and evaluated according to the following criteria. The quantification method was based on the quantification method of "L-ascorbyl magnesium phosphate" described in the quasi-drug raw material standard 2006. Then, the quantified content of magnesium ascorbic acid-2-phosphate was evaluated as a relative value (%: residual rate) when the content of the compound at the start of storage was 100%.
⊚: Residual rate of magnesium ascorbic acid-2-magnesium phosphate is 95% or more ○: Residual rate of magnesium -2-magnesium ascorbate is 90% or more and less than 95% ×: Residual rate of magnesium ascorbic acid-2-magnesium phosphate is 90% Less than

[Usage]
(1) Non-stickiness A usage test was conducted by 20 specialist panels on the non-stickiness of each cosmetic when applied to the skin, and the results of the questionnaire were judged according to the following criteria.
(Evaluation criteria)
⊚: 15 or more out of 20 responded that they were not sticky ○: 10 to 14 out of 20 responded that they were not sticky △: 5 to 9 out of 20 responded that they were not sticky ×: 20 4 or less of the names answered that they were not sticky

(2) No film feeling Each cosmetic was tested by 20 specialist panels for the lack of film feeling when applied to the skin, and the results of the questionnaire were judged according to the following criteria.
(Evaluation criteria)
⊚: 15 or more out of 20 responded that there was no film feeling ○: 10-14 out of 20 responded that there was no film feeling △: 5-9 out of 20 responded that there was no film feeling ×: Of the 20 respondents, 4 or less responded that there was no film feeling.

[UV protection effect]
The in vitro SPF value was measured using an SPF analyzer (manufactured by Labsphere). The measurement conditions are as ^{follows: After uniformly applying the sample to surgical tape (3M Blenderm TM Tape 152J-2) at a ratio of 20 mg / inch 2} , the SPF value in the range of 280 to 400 nm is measured, and the average value of 5 times is calculated. , Judgment was made according to the following criteria.
(Evaluation criteria)
⊚: SPF value is 30 or more ○: SPF value is 10 or more and less than 30 ×: SPF value is less than 10

[Makeup effect]
As an evaluation of the make-up effect, 20 specialist panels conducted a usage test on the color unevenness covering power of each cosmetic when applied to the skin, and judged from the results of the questionnaire according to the following criteria.
(Evaluation criteria)
⊚: Of the 20 people, 15 or more answered that they covered the uneven skin color well. ○: Of the 20 people, 10 to 14 or more answered that they covered the uneven skin color well. ×: Of the 20 respondents, 9 or less answered that they covered uneven skin tone.

The emulsified cosmetics of the formulations shown in Tables 1 to 4 were prepared, and the temporal stability of the emulsified particles, the temporal stability of -2-magnesium ascorbic acid, the feeling of use, the ultraviolet protection effect, and the make-up effect were evaluated. It was done according to the standard of.

The emulsified cosmetics obtained by the formulations shown in Tables 1 to 4 were prepared by the production methods shown below.
(Production method)
The oil phase and the aqueous phase were uniformly dispersed. The aqueous phase was gradually added to the oil phase with stirring, and the homomixer was run at 5000 rpm for 5 minutes at room temperature to emulsify. After emulsification, defoaming was obtained to obtain the emulsified cosmetics shown in Tables 1 to 4.

From the results shown in Table 1, 1 to 5% by weight of magnesium ascorbic acid-2-phosphate represented by (A) conversion 1, 1 to 10% by weight of (B) hydrophobized titanium oxide, and (C) acrylic acid. / Silicone-based graft copolymer contains 0.6% by weight as solid content, (D) pentahydroxystearic acid decaglycerin ester contains 1% by weight, and weight ratio (A) / (B) is 0.5 or more. Further, the cosmetics (Examples 1 to 8) in which the pH of the aqueous phase of the emulsified cosmetics was adjusted to 10.3 with (E) potassium hydroxide have an excellent usability, and (A) conversion 1 It was found that the stability of magnesium ascorbic acid-2-phosphate represented by (2) and the stability of emulsified particles were also excellent. On the other hand, when the content of (B) hydrophobized titanium oxide was less than 1% by weight, sufficient ultraviolet protection effect and make-up effect could not be obtained (Comparative Example 1). Further, in cosmetics having a weight ratio (A) / (B) of less than 0.5 (Comparative Examples 2 to 4), the stability of magnesium ascorbic acid-2-phosphate represented by (A) conversion 1 is maintained. I couldn't. When the content of magnesium ascorbic acid-2-phosphate represented by (A) Chemical formula 1 was 6% by weight, the usability deteriorated (Comparative Examples 5 and 6).

From the results shown in Table 2, 3% by weight of magnesium ascorbate-2-phosphate represented by (A) conversion 1, and 0.6% by weight of (C) acrylic acid / silicone-based graft copolymer as a solid content. (D) Hydrophobization in cosmetics containing 1% by weight of pentahydroxystearic acid decaglycerin ester and (E) adjusting the pH of the aqueous phase of the emulsified cosmetic to 10.3 with potassium hydroxide. Cosmetics satisfying that the content of the treated titanium oxide / or the hydrophobized iron oxide is 1 to 10% by weight and the weight ratio (A) / (B) is 0.5 or more (Examples 9 to 19). Then, (B) the hydrophobized titanium oxide / or the hydrophobized iron oxide has an excellent usability regardless of the type, and (A) the stability of the magnesium ascorbate-2-phosphate represented by the conversion 1 and The stability of the emulsified particles was also excellent. On the other hand, in cosmetics having a weight ratio (A) / (B) of less than 0.5 (Comparative Examples 9 to 13), the stability of magnesium ascorbic acid-2-phosphate represented by (A) conversion 1 deteriorates. bottom. Further, in the case of (B) hydrophobized titanium oxide and / or hydrophobized zinc oxide which is not hydrophobized iron oxide, the magnesium ascorbate-2-phosphate represented by (A) conversion 1 is stable regardless of the weight ratio. The sex could not be maintained (Comparative Examples 14 and 15).

From the results shown in Table 3, (C) acrylic acid / silicone-based graft copolymer was contained in an amount of 0.3 to 1.5% by weight, and (D) pentahydroxystearic acid decaglycerin ester was contained in an amount of 0.5 to 2% by weight. In the cosmetics used, the stability of magnesium ascorbic acid-2-phosphate represented by (A) conversion 1 and the stability of the emulsified particles were also excellent (Examples 4 and 20 to 24). On the other hand, the content of (C) acrylic acid / silicone-based graft copolymer is less than 0.3% by weight (Comparative Example 19), or (D) pentahydroxystearic acid decaglycerin ester is 0. In the cosmetics having less than 5.5% by weight (Comparative Example 27), the stability of the magnesium ascorbic acid-2-phosphate represented by (A) Chemical Acid 1 or the stability of the emulsified particles deteriorated. In addition, cosmetics containing (C) acrylic acid / silicone-based graft copolymer exceeding 1.5% by weight, or (D) pentahydroxystearic acid decaglycerin ester content exceeding 2% by weight (comparative). In Examples 20, 27, 28), the feeling of use was deteriorated due to a strong feeling of film and a strong feeling of stickiness. Polymers other than the (C) acrylic acid / silicone-based graft copolymer could not stabilize the magnesium ascorbic acid-2-phosphate represented by (A) Chemical formula 1 (Comparative Examples 16 to 18). .. Even when an emulsifier other than (D) pentahydroxystearic acid decaglycerin ester was used, magnesium ascorbic acid-2-phosphate represented by (A) formation 1 could not be stabilized (Comparative Examples 24-26). ).

From the results shown in Table 4, 3% by weight of magnesium ascorbic acid-2-phosphate represented by (A) conversion 1, 5% by weight of (B) hydrophobized titanium oxide, and (C) acrylic acid / silicone-based graft. It contains 0.6% by weight of the copolymer, 1% by weight of the (D) pentahydroxystearic acid decaglycerin ester, and the weight ratio (A) / (B) is 0.6, and (E) water. In the cosmetics (Examples 4 and 25 to 28) in which the pH of the aqueous phase of the emulsified cosmetic was adjusted to 10.0 to 11.0 with potassium oxide, -2-phosphoric acid ascorbic acid represented by (A) conversion 1 was used. The stability of magnesium phosphate and the stability of emulsified particles were excellent. On the other hand, in cosmetics (Comparative Examples 30 to 33) in which the pH of the aqueous phase of the emulsified cosmetic is less than 10.0, the ascorbic acid-2-phosphate represented by (A) formation 1 can be stabilized. could not. (E) Even when potassium hydroxide was used, when the pH exceeded 11.0, the stability of the emulsified particles deteriorated (Comparative Example 34). (E) When the pH is adjusted to 10.4 using 2-amino-2-methyl-1,3-propanediol, which is a base other than potassium hydroxide, the stability of the emulsified particles deteriorates and (A). ) Magnesium ascorbic acid-2-phosphate represented by Chemical formula 1 could not be stabilized.

In Tables 1 to 4, the following products were used as the components shown below.
* 1: MTY-700BS (manufactured by TAYCA)
* 2: KP-545 (manufactured by Shin-Etsu Chemical Co., Ltd.)
* 3: NIKKOL Decaglin 5-HS (manufactured by Nikko Chemicals Co., Ltd.)
* 4: Ascorbic acid PM (manufactured by Showa Denko KK)
* 5: SA-Titanium MP-1133 (manufactured by TAYCA)
* 6: SOLAVEIL XTP1-PW- (MV) (manufactured by Croda)
* 7: ITT-2 TiO2 MP-1133 (manufactured by TAYCA)
* 8: ITT-5 RED R-516P (manufactured by Daito Kasei Kogyo Co., Ltd.)
* 9: ITT-2 YELLOW LL-100P (manufactured by Daito Kasei Kogyo Co., Ltd.)
* 10: ITT-2 BLACK BL-100P (manufactured by Daito Kasei Kogyo Co., Ltd.)
* 11: SAS-Red R516-PS (manufactured by Miyoshi Kasei, Inc.)
* 12: SAS-Yellow LL-100P (manufactured by Miyoshi Kasei, Inc.)
* 13: SAS-Black BL-100P (manufactured by Miyoshi Kasei, Inc.)
* 14: SI-UFZO-310 (manufactured by Miyoshi Kasei, Inc.)
* 15: FINEX-50W-LP2 (manufactured by Sakai Chemical Industry Co., Ltd.)
* 16: KF-7312J (manufactured by Shin-Etsu Chemical Co., Ltd.)
* 17: TSPL-30-D5 (manufactured by Shin-Etsu Chemical Co., Ltd.)
* 18: Antagon V-220F polymer (manufactured by Ashland)
* 19: NIKKOL Hexaglin PR-15 (manufactured by Nikko Chemicals Co., Ltd.)
* 20: Resolex PGIS 32 (manufactured by Higher Alcohol Industry Co., Ltd.)
* 21: EMALEX GWIS-310 (manufactured by Nippon Emulsion Co., Ltd.)

Hereinafter, the present invention will be described with reference to examples in order to explain in detail.

Example 29 Creamy whitening sunscreen cosmetic content component content (% by weight)
Oil phase (1) Diethylaminohydroxybenzoyl hexyl benzoate 2.00
(2) Ethylhexyl methoxycinnamate 10.00
(3) Lauroyl sarcosine isopropyl 12.00
(4) Decamethyltetrasiloxane 17.00
(5) Octyldodecyl neopentanoate 10.00
(6) Pentahydroxystearic acid decaglyceryl ester 1.20
(7) Dipolyhydroxystearate PEG-30 0.50
(8) 13% stearic acid-treated fine particles Titanium oxide * 22 5.00
(9) Acrylic acid / silicone-based graft copolymer 30% cyclo 2.50
Pentasiloxane solution
(10) Disteardimonium hectorite 1.50
Aqueous phase (11) Purified water remaining amount (12) 1,3-butylene glycol 10.00
(13) Ascorbic acid-2-sodium phosphate 3.00
(14) Sodium citrate 3.00
(15) EDTA-4Na 0.10
(16) Ethanol 4.00
(17) Methyl paraoxybenzoate 0.20
(18) Sodium hydroxide 0.20
* 22: MT-100Z (manufactured by TAYCA)

(Preparation method)
After the component (1) was heated and dissolved in the component (2), the components (3) to (10) were added and uniformly dispersed. A mixed aqueous solution of the components (11) to (18) was added thereto, and the homomixer was run at 5000 rpm for 5 minutes at room temperature to emulsify. After emulsification, defoaming was obtained to obtain an emulsified cosmetic. The pH of the aqueous phase was 10.5.

(A) Sodium ascorbate-2-phosphate represented by Chemical formula 1 is 3% by weight, (B) Hydrophobicized titanium oxide is 5% by weight, and (C) Acrylic acid / silicone-based graft copolymer is a solid content. It contains 0.75% by weight, 1.2% by weight of (D) pentahydroxystearic acid decaglycerin ester, and has a weight ratio (A) / (B) of 0.6, and further contains (E) sodium hydroxide. Example 29, in which the pH of the aqueous phase of the emulsified cosmetic was adjusted to 10.5, had an excellent usability, and the sodium ascorbate-2-phosphate represented by (A) Chemical formula 1 and the emulsified particles were stable. The sex was also excellent. An emulsified cosmetic that has both a whitening effect and an ultraviolet protection effect and is highly stable over time was obtained.

According to the present invention, it is possible to provide an emulsified cosmetic that has both a whitening effect and an ultraviolet protection effect and is highly stable over time.

Claims (4)

(A) Ascorbic acid-2-phosphate represented by Chemical formula 1 to 5% by weight

(B) Hydrophobicized Titanium Oxide and / or Hydrophobized Iron Oxide 1-10% by Weight
(C) Acrylic acid / silicone-based graft copolymer 0.3 to 1.5% by weight
(D) Pentahydroxystearic acid decaglycerin ester 0.5 to 2% by weight
, And the weight ratio (A) / (B) is 0.5 or more, and (E) water for emulsifying cosmetics with an alkali metal hydroxide selected from sodium hydroxide and / or potassium hydroxide. An emulsified cosmetic characterized in that the pH of the phase is adjusted to 10.0 to 11.0. The emulsified cosmetic according to claim 1, wherein the hydrophobized zinc oxide is not contained. The emulsified cosmetic according to claim 1 or 2, wherein the emulsified cosmetic is a water-in-oil emulsified cosmetic. The emulsified cosmetic according to any one of claims 1 to 3, which is characterized by being creamy.