JP2012214449A - Oil-in-water emulsion cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil-in-water emulsion cosmetic including hydrotalcites in which a specific ultraviolet absorber is intercalated into a space between layers, more concretely, which is stably blended using phospholipid and xanthan gum, has uniform extendability, and excellent emulsion stability and ultraviolet protective effect.SOLUTION: The oil-in-water emulsion cosmetic contains the following components (A) to (C): (A) phospholipid; (B) xanthan gum; and (C) hydrotalcites represented by formula (1) [MM(OH)] [AmHO] (1) (where, Mdenotes bivalent metal such as Mg and/or Zn; Mdenotes trivalent metal such as Al; Adenotes 2-phenylbenzimidazole-5 sulfonic acid; and x and m lie in the following ranges, 0.6<x<0.85 and 0≤m<5).

Description

  The present invention relates to an oil-in-water emulsified cosmetic containing hydrotalcite intercalated with a specific ultraviolet absorber, and more specifically, it is stably blended using phospholipid and xanthan gum, and uniformly The present invention relates to an oil-in-water emulsified cosmetic that has excellent spread, emulsion stability, and UV protection effect.

Hydrotalcite has the general formula ^{_{[M 2+ 1-x M 3+}} x (OH) 2] [A n- x / n · mH 2 O] A compound represented by ^{(M 2+} and ^{M 3+} are divalent and 3 the valent metal ion, a ^{n- x / _n} is the representative of the interlayer anions), by ion exchange in an aqueous solution since it has anion exchange properties, an anionic substance can be intercalated. As a technique using this property, application to various cosmetics has been attempted (for example, see Patent Document 1).
There is also a technique for intercalating 2-phenylbenzimidazole-5 sulfonic acid into hydrotalcites (see, for example, Patent Documents 2 to 4).

By the way, 2-phenylbenzimidazole-5 sulfonic acid has been conventionally studied for blending into cosmetics as a water-soluble ultraviolet absorber. However, since the solubility with respect to water and oil is low, it is required to neutralize with a basic substance when blending into cosmetics. For this reason, the electrolyte concentration in the preparation is increased, and particularly in an emulsion preparation, the electrolyte is oriented in the vicinity where emulsion droplets are formed due to the charge balance of the surfactant used as an emulsifier, which affects the charge balance of the surfactant. And there are cases where restrictions are imposed on the formulation such as it becomes difficult to maintain the emulsion stability over time.
For this, there is a formulation technique using a specific emulsifier (see, for example, Patent Documents 5 and 6).
Japanese Patent Laid-Open No. 3-190811 JP 2009-120783 A JP 2008-1774 A JP 2008-214465 A JP 2008-120755 A JP 2002-284638 A

The technologies of Patent Documents 1 to 4 described above are technologies for intercalating a specific substance between the layers of hydrotalcites. If this technology is used, an organic material such as 2-phenylbenzimidazole-5 sulfonic acid is used. It is possible to improve the decrease in the feeling of use such as stickiness due to the ultraviolet absorber. However, since hydrotalcite itself is a hydrophilic (fine particle) clay mineral having a hydroxyl group on the powder surface, it is also a charged component, like 2-phenylbenzimidazole-5 sulfonic acid, especially for emulsified formulations. Could be a problem.
Furthermore, the technologies of Patent Document 4 and Patent Document 5 enable stable blending of 2-phenylbenzimidazole-5 sulfonic acid by combining an acylated emulsifier with a specific component. However, even when hydrotalcites intercalated with 2-phenylbenzimidazole-5 sulfonic acid are formulated into formulations using these emulsification techniques, stability over time may not be obtained. This is because hydrotalcite is a powder having a surface charge, so that it is considered that orientation into emulsified droplets and aggregation of powders occur. It is an object of the present invention to develop a technology capable of stably blending hydrotalcites into an oil-in-water emulsion cosmetic.

  In view of this situation, the present inventors have conducted intensive studies. As a result, in order to stably blend hydrotalcites intercalated with 2-phenylbenzimidazole-5sulfonic acid into an oil-in-water emulsion cosmetic, It was necessary to form an emulsified layer, and the inventors discovered that only phospholipids can be used as an emulsifier. Further, it has been found that in order to further improve the dispersibility and stability retention of hydrotalcite, it cannot be realized unless a system combining this phospholipid and xanthan gum is used. Furthermore, it was considered that the behavior of hydrotalcites as water-based substances was suppressed, and it was found that hydrotalcites are effective for improving the temporal stability by hydrophobizing them. Further, it has been found that a synergistic UV protection effect can be obtained by using in combination with 2-methoxyhexyl paramethoxycinnamate.

That is, the present invention
The following components (A) to (C);
(A) Phospholipid (B) Xanthan gum (C) The following formula (1)
^{_{[M 2+ x M 3+ 1-}} x (OH) 2] [A n- x / n · mH 2 O] ··· (1)
^{(Wherein, M 2+} is a divalent metal such as Mg and / or ^{Zn, M 3+} is a trivalent metal such as ^{Al, A n-represents} a 2-phenyl-benzimidazole -5-sulfonic acid, x and m are in the following ranges: The present invention relates to an oil-in-water emulsified cosmetic comprising hydrotalcites represented by 0.6 <x <0.85, 0 ≦ m <5).

  The present invention also relates to an oil-in-water emulsified cosmetic, wherein component (C) is hydrophobized.

  The present invention also relates to an oil-in-water emulsified cosmetic, wherein the content of component (B) is 0.05 to 0.3% by mass.

  The present invention also relates to an oil-in-water emulsified cosmetic, wherein the mass ratio of component (B) to component (C) is (C) / (B) = 13.3-80.

  The invention also relates to an oil-in-water emulsified cosmetic comprising component (D) 2-ethylhexyl paramethoxycinnamate.

  The underwater emulsified cosmetic composition of the present invention can stably incorporate into the system the hyodotalcite intercalated with 2-phenylbenzimidazole-5 sulfonic acid, uniformly spread, emulsification stability, and UV protection effect It is excellent.

Hereinafter, the present invention will be described in detail. In the present specification, “to” means a range including numerical values before and after.
The phospholipid of component (A) of the present invention is contained as an emulsifier for an underwater emulsified cosmetic, and has an effect of improving the emulsion stability. Such a phospholipid is not particularly limited as long as it is used in normal cosmetics, for example, soybean-derived phospholipid, soybean-derived hydrogenated phospholipid, soybean-derived lysophospholipid, soybean-derived hydrogenated lysophospholipid, Egg yolk-derived phospholipids, egg yolk-derived hydrogenated phospholipids, egg yolk-derived lysophospholipids, egg yolk-derived hydrogenated lysophospholipids can be mentioned, and these phospholipids can be used singly or in combination of two or more as necessary. Examples include soybean-derived hydrogenated phospholipid, soybean-derived hydrogenated lysophospholipid, egg yolk-derived hydrogenated phospholipid, and egg yolk-derived hydrogenated lysophospholipid. Even more preferred are lysed phospholipids such as soybean-derived hydrogenated lysophospholipid and egg yolk-derived hydrogenated lysophospholipid. These phospholipids can be used singly or in combination of two or more as required.

  The phospholipid content of the component (A) in the oil-in-water emulsified cosmetic of the present invention is not particularly limited, but is preferably 0.1 to 4% by mass (hereinafter abbreviated as “%”), and this range. And the hydrotalcite of component (C), which will be described later, can be blended stably without agglomerating in the system, and the oil-in-water type emulsified makeup is excellent in uniform spread, emulsification stability and UV protection effect. A fee is obtained.

The xanthan gum of component (B) of the present invention is a natural gum derived from microorganisms obtained by fermenting carbohydrates such as glucose with the genus Xanthomanas, and contributes as emulsion stability and powder dispersion of component (C) described later. To do. Such xanthan gum is not particularly limited as long as it is used in ordinary cosmetics, and commercially available products include GLINSTED.
XANTHAN CLEAR 80 (manufactured by DANISCO), Echo Gum (manufactured by Gokyo Sangyo Co., Ltd.), Celtrol (manufactured by Koei Kogyo Co., Ltd.) and the like.

  The content of component (B) xanthan gum in the oil-in-water emulsified cosmetic of the present invention is preferably 0.05 to 0.3%, more preferably 0.1 to 0.25%. Within this range, the hydrotalcite of component (C) can be stably blended without agglomerating in the system, and the oil-in-water is excellent in uniform spread, emulsion stability, and UV protection effect. A type emulsified cosmetic is obtained.

Component (C) of the present invention has the following formula (1),
^{_{[M 2+ x M 3+ 1-}} x (OH) 2] [A n- x / n · mH 2 O] ··· (1)
^{(Wherein, M 2+} is a divalent metal such as Mg and / or ^{Zn, M 3+} is a trivalent metal such as ^{Al, A n-represents} a 2-phenyl-benzimidazole -5-sulfonic acid, x and m are in the following ranges: Hydrotalcites represented by 0.6 <x <0.85, 0 ≦ m <5) are used in oil-in-water emulsified cosmetics. It is formulated as a protective agent.
Moreover, the average particle diameter of a component (C) is although it does not specifically limit, Preferably it has the range of 0.3-2.0 micrometers. The average particle diameter in this case can be measured by a Coulter counter (manufactured by Beckman Coulter, Inc .: Submicron Particle Analyzer N5).

The content of the hydrotalcite of the component (C) in the oil-in-water emulsified cosmetic of the present invention is not particularly limited, but is preferably 1 to 6%, and within this range, the hydrotalcite of the component (C) Can be blended stably without agglomeration in the system, and an oil-in-water emulsified cosmetic excellent in uniform elongation and spread, emulsion stability, and UV protection effect is obtained.

  The hydrophobization treatment in the present invention contributes to reducing the behavior as a charged substance in an aqueous system by chemically or physically adsorbing on the powder surface to make the powder surface hydrophobic. To do. Such a treatment agent can be used without particular limitation as long as it is generally used in cosmetics. In the present invention, the hydrophobization level of the treatment agent is defined by the contact angle, and purified water using a contact angle measuring device (Dropmaster DM500, manufactured by Kyowa Interface Science Co., Ltd.) and a droplet method (θ / 2 method). After 0 μL is dropped on the sample surface coated with the coating film of the treatment agent, the contact angle after 1.0 second can be measured. In the present invention, a treatment agent having a contact angle of 65 ° or more, preferably 70 ° or more is preferable. Specifically, fatty acid, N-lauroyl-L-lysine, dimethylpolysiloxane, methylhydrogenpolysiloxane, (dimethicone / methicone) copolymer, reactive silicone, reactive silane, reactive alkyl titanium, high viscosity silicone, Silicone compounds such as cross-linked silicone, acrylic-modified silicone, fluorine-modified silicone, silicone resin, metal soap, polyisobutylene, wax, oil and other oils, perfluoroalkyl phosphate (salt), perfluoropolyether, perfluoropolyether Fluorine compounds such as alkyl phosphoric acid, PVP-modified polymers such as PVP-hexadecene copolymer, and the like can be used, and one or more of these can be used. Particularly preferably, fatty acid, N-lauroyl-L-lysine, dimethylpolysiloxane, methylhydrogenpolysiloxane, (dimethicone / methicone) copolymer, triethoxycaprylylsilane, isopropyl titanium triisostearate, perfluoroalkyl phosphate (salt) ), A treating agent such as a fluorine compound such as perfluoropolyether or perfluoropolyetheralkylphosphoric acid. In the present invention, the treatment amount for hydrophobizing is preferably 0.5 to 30%, more preferably 1 to 20% of the powder.

  In addition, the xanthan gum of component (B) has a powder dispersion effect of the hyrodtalcite of component (C) and imparts the emulsion stability of the oil-in-water emulsion cosmetic in the present invention. The effect can be further enhanced by setting the components (B) and (C) to a specific content ratio. That is, the content mass ratio is preferably in the range of (C) / (B) = 13.3 to 80, more preferably in the range of 15 to 50. Xanthan gum is a polymer with strong pseudoplastic viscosity, and in a stationary state, it forms a three-dimensional network structure similar to the gel structure of xanthan gum molecules, and in addition, xanthan gum is potassium. Because it contains electrolyte components such as salt, sodium salt, calcium salt, etc., it is considered that these contribute to the dispersibility of hydrotalcites by charge interaction on the surface of hydrotalcites. . On the other hand, by applying a force such as stirring, the network structure is gradually destroyed and the viscosity is lowered. However, by returning to the stationary state again, the network structure is reconstructed to show a high viscosity. It is considered that such properties contribute to stable dispersibility at the time of blending with the hyrodtalcite and over time.

The component (D) 2-ethylhexyl paramethoxycinnamate in the oil-in-water emulsified cosmetic of the present invention is blended in the oil-in-water cosmetic as a UV protection agent.
Further, when it is contained together with 2-phenylbenzimidazole-5 sulfonic acid intercalated between the layers of the synthetic hydrodotalcite of the component (C), an excellent ultraviolet protection effect is exhibited.

  The content of component (D) 2-ethylhexyl paramethoxycinnamate in the oil-in-water emulsion cosmetic of the present invention is not particularly limited, but is preferably 0.1 to 10%, more preferably 0.5 to 5%. Within this range, an oil-in-water emulsified cosmetic excellent in uniform elongation and spread, emulsion stability, and UV protection effect can be obtained.

  The emulsified cosmetic of the present invention contains water in addition to the above essential components, but is not particularly limited as long as it is generally used in cosmetics. In addition to water, purified water, hot spring water, deep water, or steam distilled water from plants may be used, and one or two or more kinds may be appropriately selected and used as necessary. Moreover, content is not specifically limited, Although it can contain suitably according to the amount of other components, it can be used in 50 to 90% of range in general.

  As a method for producing the oil-in-water emulsified cosmetic of the present invention, various methods such as dispersion emulsification and phase inversion emulsification can be used depending on the viscosity of the water phase and the oil phase. The method by the following phase inversion emulsification is mentioned. That is, component (A), component (D) and other appropriately formulated oily components are uniformly dispersed at a temperature of 70 ° C. or higher, and then water heated to 70 ° C. or higher is gradually added to the dispersion. After stirring and gradually cooling to room temperature, the components (B) and (C) are added and mixed.

  Further, the oil-in-water emulsified cosmetic of the present invention includes components generally used in cosmetics in addition to the above essential components, for example, water-soluble components, humectants, powders, pigments, UV absorption other than the components of the present invention. Quantities that do not impair the effects of the present invention for ingredients used in normal cosmetics, such as agents, film-forming agents, pH adjusters, anti-fading agents, antioxidants, antifoaming agents, cosmetic ingredients, preservatives, and fragrances It can mix | blend suitably in a qualitative range.

  Examples of the use of the oil-in-water emulsified cosmetic of the present invention include skin care cosmetics such as lotion, milky lotion, cream, and daytime cosmetics, and cosmetic base cosmetics. And the method used in the method, impregnated into a non-woven fabric and the like.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated further in detail, this invention is not limited at all by these Examples.

First, production examples of the component (C) of the present invention are shown below.
(Production Example 1)
As an example of the production of specific component (C), as shown in Patent Document 2, 40 g of commercially available magnesium hydroxide (Kyowa Chemical Industry Co., Ltd., Kisuma 5Q) is dispersed in about 200 mL of water. 137 mL of aluminum sulfate (Al ₂ O ₃ = 1.0 mol / L) was placed in a 1,000 mL beaker, and 137 mL of an aqueous sodium carbonate solution (1.0 mol / L) was added and reacted with stirring. To this reaction product, a slurry of Kisuma 5Q was added and reacted (about 30 ° C.) with stirring, and then transferred to a 1 liter autoclave and hydrothermally treated at 150 ° C. for 8 hours. The slurry of the hydrothermally treated product was filtered under reduced pressure, subsequently ion-exchanged with 2 L of 0.5 mol / L sodium carbonate to form CO ₃ type synthetic hydrotalcite, then washed with 2 L of water and dried (120 ° C. ). After dispersing 50 g of the obtained powder in 500 mL of hot water at about 20 ° C., 100 mL of an acid type aqueous solution of 2-phenylbenzimidazole-5 sulfonic acid (1.0 mol / L, 70 ° C.) was added with stirring, and 70 ° C. for 30 minutes. And ion exchange was performed. Then, it filtered under reduced pressure, washed with water, dried (120 ° C.) and pulverized. After the obtained powder was dissolved in hydrochloric acid by heating, the metal was measured by chelate titration, the amount of anion was measured by absorptiometry, the crystal water was measured by TG-DTA, and the chemical composition was examined. As a result, 2-phenylbenz Mg _0.68 Al _0.32 (OH) ₂ (2-phenylbenzimidazole-5 sulfonic acid) _0.30 (CO ₃ ) _0.01 · 0 intercalated with 51.2% imidazole-5 sulfonic acid .9H ₂ O hydrotalcites were obtained. As a result of measurement by SEM, the crystal outer shape was a hexagonal plate shape with an average particle diameter of 1.7 μm.

(Production Example 2)
It is one of CO ₃ type synthetic hydrotalcite synthesized by coprecipitation method using magnesium hydroxide, aluminum sulfate and sodium carbonate with hexagonal plate shape and average particle size of about 0.5μm. After dispersing 50 g of powder of DHT-4 (manufactured by Kyowa Chemical Industry Co., Ltd.) in 500 mL of hot water at about 20 ° C., 100 mL of an acid type aqueous solution of 2-phenylbenzimidazole-5 sulfonic acid (1.0 mol / L, 70 ° C.) In addition to stirring, the mixture was stirred for 30 minutes at 70 ° C., and 2-phenylbenzimidazole-5sulfonic acid was intercalated by ion exchange. Then, it filtered under reduced pressure, washed with water, dried (120 ° C.) and pulverized. After the obtained powder was dissolved in hydrochloric acid by heating, the metal was measured by chelate titration, the amount of anion was measured by absorptiometry, the crystal water was measured by TG-DTA, and the chemical composition was examined. As a result, 2-phenylbenz Mg _0.69 Al _0.31 (OH) ₂ (2-phenylbenzimidazole-5 sulfonic acid) _0.29 (CO ₃ ) _0.01 · 0 intercalated with 50.5% imidazole-5 sulfonic acid .88H ₂ O hydrotalcites were obtained.

(Production Example 3)
To 1000 mL of purified water heated to 70 ° C., 3 g of stearic acid and 0.5 g of sodium hydroxide were mixed to form an aqueous solution. After mixing 100 g of hydrotalcite obtained in Production Example 2, 0 Stearic acid is precipitated on the surface of the powder by shifting the pH to a neutral region using 120 mL of 1 mol / L dilute hydrochloric acid, washed, dried (120 ° C.), pulverized, and then 2-phenylbenzimidazole-5 sulfone Hydrotalcites whose acid was 50.5% intercalated and whose surface was treated with stearic acid 3% were obtained.

(Production Example 4)
Hydrotall obtained in Production Example 2 by mixing 1 g of stearic acid, 3 g of N-lauroyl-L-lysine and 0.6 g of sodium hydroxide in 1000 mL of purified water heated to 70 ° C. After mixing with 100 g of sites, stearic acid and N-lauroyl-L-lysine are precipitated on the surface of the powder by pH shifting to a neutral region using 150 mL of 0.1 mol / L dilute hydrochloric acid, washing, After drying (120 ° C.) and grinding, hydrotalcite treated with 50.5% 2-phenylbenzimidazole-5 sulfonic acid, 1% stearic acid, and 3% N-lauroyl-L-lysine Got a kind.

Invention products 1 to 10 and comparative products 1 to 18: oil-in-water emulsified cosmetics Oil-in-water emulsified cosmetics shown in Tables 1 to 3 were prepared by the following production method. The “emulsification stability”, “degree of powder aggregation”, and “uniform elongation spread” of the obtained oil-in-water emulsion cosmetic were evaluated by the following methods, and the results are shown in Tables 1 to 3 together with the results. .

(Raw materials listed in the table)
* 1 Resinol S-10 (Nikko Chemicals)
* 2 GLINSTED XANTHAN CLEAR 80 (manufactured by DANISCO)
* 3 Sepigel 305 (manufactured by SEPPIC)
* 4 ANTARON V-220 (manufactured by ISP)
* 5 LUVISKOL K90 (made by Badish)
* 6 Natrozole 250HHR (Hercles)
* 7 Metrose 60SH-10000 (manufactured by Shin-Etsu Chemical Co., Ltd.)
* 8 Kelcogel LT100 (Dainippon Sumitomo Pharma Co., Ltd.)
* 9 CARBOPOL940 (LUBIZOL ADVANCED MATERIALS)
* 10 CARBOPOL1342 (LUBIZOL ADVANCED MATERIALS)
* 11 Aronbis S (Nippon Pure Chemicals)
* 12 Kachinar HC-100 (manufactured by Toho Chemical Industry Co., Ltd.)
* 13 Kunipia G-4 (Kunimine Industry Co., Ltd.)
* 14 DHT-4 (Kyowa Chemical)

(Production method)
A: Components (1) to (13) are heated to 75 ° C. and mixed uniformly.
B: Component (14) and component (15) are heated to 75 ° C. and mixed uniformly.
C: B is gradually added to A and emulsified with a despa mixer.
D: The water-soluble polymers of components (16) to (26) and the clay mineral of component (27) are dispersed in water at various concentrations in advance and uniformly mixed in a despa mixer in order to uniformly mix the emulsion. Keep mixed.
E: Components (28) to (35) are uniformly mixed in advance with a despa mixer so as to be easily blended into the emulsion.
F: Components (36) to (38) are uniformly mixed and dissolved in advance so as to be easily blended into the emulsion.
G: After cooling C to room temperature, D, E, and F were uniformly mixed with a despa mixer to obtain an oil-in-water emulsion cosmetic.

(Evaluation method: emulsion stability)
Measurement of the average particle diameter of the emulsified droplets and the standard deviation of each sample stored in a constant temperature bath at 50 ° C. for 1 month immediately after production and emulsification by coalescence and aggregation immediately after production and at 50 ° C. for 1 month The droplet size distribution was used as an index of emulsion stability, and the proportion of the measured particle size distribution of the emulsified droplets was evaluated according to the following four-stage criteria. The average particle size was measured by a Coulter counter (Beckman Coulter, Inc .: submicron particle analyzer N5), and appearance observation was performed by visual evaluation.

Four-level evaluation criteria (Evaluation axis is the ratio of the distribution of particles whose measured particle size is from the average particle size to the standard deviation)
(Evaluation) (Criteria)
75% or more: ◎
Less than 75% 50% or more: ○
Less than 50%, slight separation by appearance observation: △
Less than 50%, poor emulsification or significant separation: ×

(Evaluation method: degree of powder aggregation)
The appearance properties of each sample immediately after production and stored in a thermostat at 50 ° C. for 1 month were visually observed on a 5 cm × 5 cm quartz glass plate to which 0.5 g of each sample was dropped, and derived from a powder of 1 mm or more The white agglomerates were counted, and the absence of powder agglomeration was evaluated according to the following four-stage criteria.

Four-level evaluation criteria (Evaluation) (Criteria)
No visual agglomerates are observed: ◎
Less than 5 aggregates are observed: ○
5 or more and less than 10 aggregates are observed: Δ
10 or more aggregates are observed: ×

(Evaluation method: Uniform stretch spread)
Each sample immediately after production was subjected to a use test by 20 specialist panels, and an appropriate amount was applied to the inner part of the forearm.
Note that the spread of spread is greatly affected by the presence or absence of powder aggregation. If there is no powder agglomeration, the spread will be uniform, but increasing the amount of powder agglomerates may affect the feeling of use. Evaluated and scored.
Furthermore, the average value was calculated from the total score of all the panels for each sample, and judged according to the following four-step criteria.

4-level absolute evaluation (score) (evaluation)
4 points: 3 points that are very smooth and uniform stretch 2 points 2 that is smooth and uniform stretch 1 point that is slightly non-uniform stretch and spread 1 point: non-uniform stretch and spread

4-step criteria (judgment) (average score)
◎: Over 3.5 points: Very good ○: Over 3 points 3.5 points or less: Good △: Over 2 points 3 points or less: Slightly poor x: 2 points or less: Bad

  As is apparent from the results of Tables 1 to 3, the products 1 to 10 of the present invention according to the present invention can be stably blended without aggregating the component (C) in the system, and are uniform. It was an oil-in-water emulsified cosmetic material that has spread and excellent emulsification stability. Comparative products 1 to 4 are emulsifiers different from the phospholipids of the present invention, comparative product 5 is obtained by removing xanthan gum, which is the water-soluble polymer of the present invention, and comparative products 6 to 10 are nonionic instead of xanthan gum. Comparative products 12 to 14 are anionic water-soluble polymers, comparative product 15 is a cationic water-soluble polymer, and comparative product 16 is a clay mineral. However, it was not possible to produce a uniform oil-in-water emulsified cosmetic, to maintain emulsion stability over time, or to produce an oil-in-water emulsified cosmetic having a uniform spread. In particular, aggregation of hydrotalcites in the present invention over time could not be prevented even with a nonionic water-soluble polymer instead of xanthan gum.

(Evaluation: SPF value)
SPF values were measured for the inventive products 3 to 5, 7, and 8 and comparative products 5, 17, and 18 described in Tables 1 to 3 above, and the UV protection effect was evaluated. The results are shown in Table 4.
〔Measuring method〕
Attached to transpore tape (3M Co.) in the area of 40 cm ² black frame is applied uniformly each sample to be 1 mg / cm ² on the tape portion. An SPF analyzer (manufactured by UV TRANSMITTANCE Labsphere) measured 15 points on the tape part to which the sample was applied, and averaged to obtain an SPF value.

As is clear from the results in Table 4, the inventive products 3 to 5, 7 and 8 according to the present invention were oil-in-water emulsified cosmetics having an excellent ultraviolet protection effect. Comparative product 5 was obtained by removing xanthan gum, which is the water-soluble polymer of the present invention, and had a lower SPF value than any of the products of the present invention. From this, xanthan gum acted as a powder dispersant that satisfactorily disperses the component (C), and the effect of improving the SPF value was confirmed.
The comparative product 17 contains only 2-ethylhexyl paramethoxycinnamate as a UV protection agent. Comparative product 18 is obtained by blending 2-phenylbenzimidazole-5 sulfonic acid in the water phase instead of component (C). From the results of the SPF value of the comparative products 17 and 18 and the SPF value of the product of the present invention, any of the intercalation with hydrotalcites was carried out as it was as 2-phenylbenzimidazole-5 sulfonic acid. In the example, the effect of improving the SPF value in synergy with 2-ethylhexyl paramethoxycinnamate was confirmed.

Example 2: Lotion (Ingredient) (%)
(1) Hydrogenated soybean lysophospholipid * 15 0.1
(2) POE (60) hydrogenated castor oil 0.3
(3) Olive oil 1
(4) Purified water 10
(5) 1,3-butylene glycol 20
(6) POE (60) hydrogenated castor oil 0.05
(7) Hydrotalcites 1 of Production Example 1
(8) Preservative appropriate amount (9) Xanthan gum * 16 1% aqueous solution 5
(10) Purified water remaining amount * 15 HP70H (Nippon Seika Co., Ltd.)
* 16 Celtic roll (manufactured by Koei Kogyo Co., Ltd.)

A lotion was prepared by the following manufacturing method (manufacturing method).
A: Components (1) to (3) are heated to 75 ° C. and mixed uniformly.
B: Component (4) is heated to 75 ° C. and mixed uniformly.
C: B is gradually added to A and emulsified with a despa mixer.
D: Disperse components (5) to (7) uniformly with a despa mixer.
E: Component (9) is prepared in advance with a despa mixer so as to have a predetermined concentration.
F: C was cooled to room temperature, and components (8), (10), D, and E were mixed uniformly to obtain a lotion.

  The skin lotion of Example 2 is capable of stably blending the component (C) without agglomerating in the system, has uniform elongation and spread, and is excellent in emulsion stability and UV protection effect. It was an oil-type emulsified cosmetic.

Example 3: Emulsion (component) (%)
(1) Hydrogenated soybean phospholipid * 17 2
(2) Cetanol 0.5
(3) Conol 0.5
(4) POE (20) hydrogenated castor oil 2
(5) Polyglyceryl laurate-10 2
(6) 2-ethylhexyl paramethoxycinnamate 10
(7) Jojoba oil 5
(8) Preservative appropriate amount (9) Glycerin 5
(10) Purified water remaining amount (11) 1,3-butylene glycol 7
(12) POE (20) hydrogenated castor oil 0.05
(13) Polyglyceryl laurate-10 0.05
(14) Hydrotalcite 3 of Production Example 2
(15) Xanthan gum * 18 1% aqueous solution 15
(16) Ethanol 3
(17) Fragrance appropriate amount * 17 Nikkor S-10EZ (Nikko Chemicals)
* 18 Echo gum (made by Gokyo Sangyo)

The emulsion was prepared by the following manufacturing method (manufacturing method)
A: Components (1) to (8) are heated to 75 ° C. and mixed uniformly.
B: Components (9) and (10) are heated to 75 ° C. and mixed uniformly.
C: A is gradually added to B and emulsified with a despa mixer.
D: Components (11) to (14) are uniformly dispersed with a despa mixer.
E: Component (15) is prepared in advance with a despa mixer to a predetermined concentration.
F: C was cooled to room temperature, and components (16), (17), D, and E were uniformly mixed therein to obtain an emulsion.

  The emulsion of Example 3 is an oil-in-water solution capable of stably blending the component (C) without agglomerating in the system, having a uniform elongation, excellent emulsification stability, and UV protection effect. Type emulsified cosmetic.

Example 4: Cream (ingredient) (%)
(1) Hydrogenated lecithin * 19 3
(2) Conol 1.5
(3) POE (20) hydrogenated castor oil 3
(4) Tetraoleic acid polyoxyethylene (30) sorbit 2
(5) 2-ethylhexyl paramethoxycinnamate 10
(6) Squalane 5
(6) Petrolatum 2
(7) Shea fat 3
(8) Preservative appropriate amount (9) Purified water remaining amount (10) Glycerin 5
(11) 1,3-butylene glycol 5
(12) POE (20) hydrogenated castor oil 0.1
(13) Tetraoleic acid polyoxyethylene (30) sorbit 0.1
(14) Hyrodtalcites of Production Example 4 6
(15) Xanthan gum * 2 2% aqueous solution 15
(16) Perfume appropriate amount * 19 Egg yolk lecithin PL-100P (manufactured by Kewpie)

A cream was prepared by the following manufacturing method (manufacturing method)
A: Components (1) to (8) are heated to 75 ° C. and mixed uniformly.
B: Components (9) and (10) are heated to 75 ° C. and mixed uniformly.
C: A is gradually added to B and emulsified with a despa mixer.
D: Components (11) to (14) are uniformly dispersed with a despa mixer.
E: Component (15) is prepared in advance with a despa mixer to a predetermined concentration.
F: C was cooled to room temperature, and components (16), D, and E were uniformly mixed therein to obtain a cream.

The cream of Example 4 can be stably blended with component (C) without agglomerating in the system, has a uniform elongation, has excellent emulsification stability, and an ultraviolet protection effect. Type emulsified cosmetic.

Example 5: Daytime serum (component) (%)
(1) Hydrogenated soybean phospholipid * 1 1
(2) Cetanol 0.5
(3) Polyglyceryl diisostearate-10 1
(4) Polyglyceryl oleate-10 1
(5) Jojoba oil 10
(6) Preservative appropriate amount (7) Glycerin 5
(8) 1,3-butylene glycol 15
(9) Purified water remaining amount (10) Ethanol 2
(11) Purified water 2
(12) Hydrotalcites 2 of Production Example 2
(13) Xanthan gum * 2 1% aqueous solution 15
(14) Cholesteryl pullulan hexidylcarbamate 0.5
(15) Perfume appropriate amount

A daytime serum was prepared by the following manufacturing method (manufacturing method)
A: Components (1) to (6) are heated to 75 ° C. and mixed uniformly.
B: Components (7) to (9) are heated to 75 ° C. and mixed uniformly.
C: B is gradually added to A and emulsified with a despa mixer.
D: Components (10) to (12) are uniformly dispersed with a despa mixer.
E: Component (13) is prepared in advance with a despa mixer so as to have a predetermined concentration.
F: C was cooled to room temperature, and components (14), (15), D, and E were uniformly mixed therein to obtain a cosmetic liquid.

The daytime beauty essence of Example 5 is capable of stably blending the component (C) without agglomerating in the system, having a uniform elongation, emulsification stability, and UV protection effect. It was an oil-in-water emulsified cosmetic with excellent resistance.

Example 6: Cosmetic foundation cosmetic (component) (%)
(1) Hydrogenated soybean phospholipid * 20 3
(2) Cetanol 0.5
(3) Behenyl alcohol 1.5
(4) POE (40) hydrogenated castor oil 1
(5) POE (60) hydrogenated castor oil 2
(6) Paraffin wax 1
(7) Polybden 4
(8) 2-Ethylhexyl paramethoxycinnamate 10
(9) Purified water remaining amount (10) Polyethylene glycol 400 2
(11) Ethanol 5
(12) Preservative appropriate amount (13) POE (40) hydrogenated castor oil 0.05
(14) POE (60) hydrogenated castor oil 1
(15) Hydrotalcites 3 of Production Example 3
(16) Synthetic phlogopite 1
(17) Methyl methacrylate cross polymer 0.5
(18) Zinc oxide 0.1
(19) Silica 0.05
(20) Iron oxide 0.05
(21) Talc 0.5
(22) Xanthan gum * 2 1% aqueous solution 25
* 19 Resinol S-PIE (Nikko Chemicals)

A cosmetic base cosmetic was prepared by the following manufacturing method (manufacturing method).
A: Components (1) to (8) are heated to 75 ° C. and mixed uniformly.
B: The component (9) is heated to 75 ° C. and mixed uniformly.
C: B is gradually added to A and emulsified with a despa mixer.
D: Disperse components (10) to (21) uniformly with a despa mixer.
E: Component (22) is prepared in advance with a despa mixer so as to have a predetermined concentration.
F: C was cooled to room temperature, and D and E were mixed uniformly to obtain a cosmetic base cosmetic.

The cosmetic base cosmetic of Example 6 can stably blend the component (C) without agglomerating in the system, has a uniform elongation, has emulsion stability, and protects against ultraviolet rays. It was an oil-in-water emulsified cosmetic with excellent resistance.

Claims (5)

The following components (A) to (C);
(A) Phospholipid (B) Xanthan gum (C) The following formula (1)
^{_{[M 2+ x M 3+ 1-}} x (OH) 2] [A n- x / n · mH 2 O] ··· (1)
^{(Wherein, M 2+} is a divalent metal such as Mg and / or ^{Zn, M 3+} is a trivalent metal such as ^{Al, A n-represents} a 2-phenyl-benzimidazole -5-sulfonic acid, x and m are in the following range: An oil-in-water emulsified cosmetic comprising hydrotalcites represented by 0.6 <x <0.85, 0 ≦ m <5). The oil-in-water type emulsified cosmetic according to claim 1, wherein the component (C) is hydrophobized. Content of the said component (B) is 0.05-0.3 mass%, The oil-in-water type emulsified cosmetics of Claim 1 or 2 characterized by the above-mentioned. The oil-in-water according to any one of claims 1 to 3, wherein the mass ratio of the component (B) to the component (C) is (C) / (B) = 13.3-80. Type emulsified cosmetic. Furthermore, component (D) 2-methoxyhexyl paramethoxycinnamate is contained, The oil-in-water type emulsion cosmetic in any one of Claims 1-4 characterized by the above-mentioned.