JP5649839B2 - Method for producing powder-containing oil-in-water emulsified cosmetic - Google Patents

Description

  The present invention relates to a cosmetic, and more specifically, an oil-in-water emulsifier type having excellent hiding power, skin color unevenness correction effect, ultraviolet ray protection effect and good usability by enhancing the dispersion stability of the powder. About cosmetics.

  Conventionally, since oil-in-water emulsified cosmetics have a fresh feeling of use and multifunctionality, various cosmetics that protect the skin from ultraviolet rays, for example, by incorporating powders such as titanium oxide and zinc oxide therein, for example, Sunscreen agents, foundation foundations, emulsified foundations, etc. have been developed.

  Organic UV absorbers are also used, but it is considered that adding a large amount of organic UV absorbers may cause skin problems such as rough skin. There is a need for cosmetics that do not. As for the ultraviolet protective powder, it is known that the smaller the particle diameter, the higher the transparency when applied to the skin while having a high ultraviolet protective effect.

  On the other hand, commonly used powders have effects such as correcting skin color unevenness, concealing spots, improving the feeling of use, and absorbing sweat and sebum to prevent breakup of makeup. Are various.

  In general, a powder having a small particle size is likely to be aggregated. In particular, when the powder is mixed simultaneously with a powder having a different particle size, such as the above powder, there is a drawback that the powder is aggregated. If the powder remains agglomerated, there are various problems such as a factor of lowering the UV protection effect and a feeling of use worsening. Therefore, in order to solve the aggregation of the powder, for example, as a gel cosmetic (see Patent Document 1) composed of an oil phase in which lipophilic powder is suspended and a surfactant aqueous solution, or as a thickener for an aqueous phase Oil-in-water emulsified cosmetics using succinoglycan have been reported (see Patent Documents 2 and 3). However, even with these techniques, the dispersion stability of the powder, the emulsion stability, and the feeling of use are still maintained. However, it was not enough.

  In addition, as cosmetics containing the powder in both the inner oil phase and the outer aqueous phase, the inner oil phase contains the powder and a partially crosslinked organopolysiloxane polymer, and the outer aqueous phase contains the powder. Although an oil-in-water makeup cosmetic (see Patent Document 4) has been reported, it is not sufficient in terms of UV protection effect and powder dispersion stability, and further, it has been reported that the inner oil phase and the outer Cosmetics in which powders having different particle diameters are mixed in an aqueous phase have not been disclosed so far.

  By the way, acyl lactic acid and / or a salt thereof are not particularly toxic. For example, calcium stearoyl lactate and sodium stearoyl lactate are permitted as food additives and are excellent in biodegradability. These acyl lactic acids and / or salts thereof are known to be used in emulsifier type skin external preparations (see Patent Document 5) together with acyl polyglycerin. However, no oil-in-water emulsified cosmetic containing powders in both the inner oil phase and the outer aqueous phase contains acyl lactic acid and / or a salt thereof. Also, it is not known at all that powders are stably dispersed and held. Moreover, there has never been an idea that acyl lactic acid and / or a salt thereof is added immediately before emulsification in the production process of an oil-in-water emulsified cosmetic.

Japanese Patent Publication No. 7-94366 JP 2004-203825 A JP 2009-286748 A JP 2008-44901 A Japanese Patent Laid-Open No. 9-48705

  The present invention has been made under such circumstances, and in an oil-in-water emulsified cosmetic containing a powder in both an inner oil phase and an outer water phase, the powder An object of the present invention is to provide a means for enhancing the dispersion stability of the above.

As a result of intensive studies to achieve the above object, the present inventor has found that acyl lactic acid and / or its It has been found that by adding a salt to the inner oil phase immediately before emulsification, a cosmetic having a good feel and excellent powder dispersion stability can be obtained, and the present invention has been completed. That is, the present invention is as follows.
<1> (A) acyl lactic acid and / or salt thereof, (B) powder whose surface is lipophilically treated in the inner oil phase, (C) powder in the outer aqueous phase, and further component (A) Is added to the inner oil phase just before emulsification in the production process.
<2> (A) The oil-in-water emulsion cosmetic according to <1>, wherein the content of acyllactic acid and / or a salt thereof is 0.01 to 1.0% by weight.
<3> (B) The oil-in-water emulsified cosmetic according to any one of <1> or <2>, wherein the average primary particle size of the powder contained in the internal oil phase is less than 100 nm .
<4> (B) The oil-in-water emulsified cosmetic according to any one of <1> to <3>, wherein the powder contained in the inner oil phase is titanium oxide and / or zinc oxide. .
<5> (B) The content of the powder in the inner oil phase is 0.1 to 15.0% by weight, and (C) the content of the powder in the outer water phase is 0.1 to 15.0% by weight. The oil-in-water emulsified cosmetic according to any one of <1> to <4>, wherein

  ADVANTAGE OF THE INVENTION According to this invention, in the oil-in-water type emulsion cosmetic containing powder, the means which improves the dispersion stability of powder can be provided, having favorable touch.

  Hereinafter, embodiments of the present invention will be described. In the oil-in-water emulsified cosmetic of the present invention, (A) acyllactic acid and / or a salt thereof is preferably added to the inner oil phase immediately before emulsification in the production process. The emulsification defined in the present invention is mixing the inner oil phase and the outer water phase, and immediately before emulsification means that the time until the inner oil phase and the outer water phase are mixed is within 5 minutes.

  The amount of component (A) acyllactic acid and / or salt thereof used in the present invention is 0.01 to 1.0% by weight, particularly 0.1 to 1.0% by weight, based on the entire cosmetic. preferable. If the blending amount is less than 0.01% by weight, the effect of suppressing the aggregation of the powder may not be sufficient. Moreover, when it mixes exceeding 1.0 weight%, since the improvement of the effect corresponding to the increase in the compounding quantity cannot be expected, it is uneconomical.

  Examples of the component (A) acyl lactic acid and / or its salt used in the present invention include octanoyl lactic acid and its sodium salt, calcium salt, magnesium salt, ammonium salt, triethanolamine salt; caproyl lactic acid and its sodium salt, calcium salt , Magnesium salt, ammonium salt, triethanolamine salt; 2-ethylhexanoyl lactic acid and its sodium salt, calcium salt, magnesium salt, ammonium salt, triethanolamine salt; lauroyl lactic acid and its sodium salt, calcium salt, magnesium salt, Ammonium salt, triethanolamine salt; myristoyl lactic acid and its sodium salt, calcium salt, magnesium salt, ammonium salt, triethanolamine salt; palmitoyl lactic acid and its sodium salt, calcium salt Magnesium salt, ammonium salt, triethanolamine salt; stearoyl lactic acid and its sodium salt, calcium salt, magnesium salt, ammonium salt, triethanolamine salt; isostearoyl lactic acid and its sodium salt, calcium salt, magnesium salt, ammonium salt, tri Ethanolamine salt; oleoyl lactic acid and its sodium salt, calcium salt, magnesium salt, ammonium salt, triethanolamine salt; 12-hydroxystearoyl lactic acid and its sodium salt, calcium salt, magnesium salt, ammonium salt, triethanolamine salt; Lisinoleyl lactic acid and its sodium salt, calcium salt, magnesium salt, ammonium salt, triethanolamine salt; behenoyl lactic acid and its sodium salt, calcium salt, Magnesium salts, ammonium salts, triethanolamine salts. In the cosmetic of the present invention, the acyllactic acid and / or salt thereof can form a stable cosmetic even in a formulation containing powder.

  In the oil-in-water emulsified cosmetic of the present invention, (B) the lipophilic treatment powder contained in the inner oil phase is obtained by making the powder lipophilic by a generally known technique. The powder preferably has an average primary particle size of less than 100 nm. The primary particles are the smallest particles constituting the powder, and the average primary particle diameter is determined by visual observation through electron microscope observation and calculating an average value. As the average primary particle size of the powder becomes smaller, the UV protection effect becomes higher and the emulsified particle size becomes finer, so that a highly transparent cosmetic can be obtained. Although powder is not specifically limited, Shapes, such as spherical shape, plate shape, and needle shape; Particle structures, such as porous and nonporous, etc. are mentioned. Specific examples include fine particle titanium oxide and fine particle zinc oxide, and one or more of these can be used.

  Examples of the treatment agent for lipophilic treatment of the powder include silicone compounds such as dimethylpolysiloxane, methylhydrogenpolysiloxane, high-viscosity silicone, cross-linked silicone, fluorine-modified silicone, acrylic-modified silicone, and silicone resin; anion interface Surfactants such as activators, cationic surfactants and nonionic surfactants; treatment with metal soaps; oils such as polyisobutylene, waxes and oils; perfluoroalkyl phosphates, perfluoropolyethers, perfluoropolyether alkyls Fluorine compounds such as phosphoric acid; PVP-modified polymers such as PVP-hexadecene copolymer; and the like, and one or more of them can be used. As a method of treating the treatment agent into powder, a known method is usually used and is not particularly limited. Examples thereof include a wet method using a solvent, a gas phase method, a mechanochemical method, and the like.

  The compounding quantity of the lipophilic processing powder contained in the component (B) internal oil phase used for this invention is 0.1-15.0 weight% with respect to the whole cosmetics, and 1.0-10. 0% by weight is preferred. If the blending amount of the powder is less than 0.1% by weight, the effect of the powder may not be sufficient. Moreover, when it mix | blends exceeding 15.0 weight%, the improvement of the effect corresponding to the increase in a compounding quantity cannot be expected, and it is necessary to increase the quantity of the oil of an inner phase, and it becomes a cause of stickiness. is there.

  In the oil-in-water emulsified cosmetic of the present invention, the powder contained in (C) the outer aqueous phase is spherical, plate-like, needle-like, etc., as long as it is a powder generally used in cosmetics; porous, nonporous There are no particular limitations depending on the particle structure such as the quality; inorganic powders, glitter powders, organic powders, pigment powders, composite powders and the like.

  Specifically, titanium oxide, black titanium oxide, conger, ultramarine, bengara, yellow iron oxide, black iron oxide, zinc oxide, aluminum oxide, silicon dioxide, magnesium oxide, zirconium oxide, magnesium carbonate, calcium carbonate, chromium oxide, Chromium hydroxide, carbon black, aluminum silicate, magnesium silicate, magnesium aluminum silicate, mica, synthetic mica, synthetic sericite, sericite, talc, kaolin, silicon carbide, barium sulfate, bentonite, smectite, boron nitride, etc. Inorganic powders: Bright powders such as bismuth oxychloride, titanium mica, iron oxide coated mica, iron oxide mica titanium, organic pigment-treated mica titanium, aluminum powder; nylon powder, polymethyl methacrylate, acrylonitrile-methacrylic acid Organic powders such as coalescence powder, vinylidene chloride-methacrylic acid copolymer powder, polyethylene powder, polystyrene powder, organopolysiloxane elastomer powder, polymethylsilsesquioxane powder, wool powder, silk powder, crystalline cellulose, N-acyl lysine Pigment powders such as organic tar pigments and lake pigments of organic pigments; particulate titanium oxide-coated mica titanium, particulate zinc oxide-coated mica titanium, barium sulfate-coated mica titanium, titanium oxide-containing silicon dioxide, zinc oxide-containing silicon dioxide These can be used alone or in combination of two or more.

  The blending amount of the powder contained in the component (C) outer aqueous phase used in the present invention is 0.1 to 15.0% by weight, particularly 1.0 to 10.0% by weight, based on the whole cosmetic. Is preferred. If the blending amount of the powder is less than 0.1% by weight, the effect of the powder may not be sufficient. Moreover, when it mixes exceeding 15.0 weight%, a feeling of use may worsen, such as a spread becoming heavy.

  The form of the oil-in-water emulsified cosmetic according to the present invention is not particularly limited, and basic cosmetics such as milky lotion, cream, gel, cosmetic liquid and pack, makeup cosmetics such as lipstick, eyeshadow, eyeliner, mascara, foundation and sunscreen. Oral cosmetics, aromatic cosmetics, hair cosmetics, body cosmetics and the like can be widely applied in any form as long as they are conventionally used for cosmetics.

  In the present invention, as long as the effects of the invention are not impaired, in addition to the above essential components, oily raw materials, surfactants, thickeners, UV protection agents, UV absorbers, humectants, film agents, sequestering agents , Lower alcohols, polyhydric alcohols, sugars, amino acids, organic amines, pH adjusters, skin nutrients, anti-inflammatory agents, plant extracts, inorganic powders, organic powders, fragrances, pigments, water, etc. The raw materials to be used can be appropriately blended.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in more detail, this invention is not limited to these Examples.

  An oil-in-water emulsified cosmetic was prepared, and the dispersion stability of the powder, the emulsion stability, the smoothness of the spread, and the lack of stickiness were evaluated. The compounding composition and evaluation result of an Example and a comparative example are shown to the following Tables 1-5. About a compounding quantity, it shows by weight%.

Evaluation criteria for the dispersion stability, emulsification stability, smoothness of smoothness, and lack of sticky feeling evaluated in this example are as follows.
(1) Evaluation Criteria for Dispersion Stability of Powder The composition was stretched on an acrylic blackboard, the state was observed, and the degree of aggregation was evaluated. If the powder is agglomerated, agglomerates are observed.
◎: No aggregates are observed ○: Almost no aggregates are observed Δ: Some aggregates are observed ×: Many aggregates are observed

(2) Evaluation Criteria of Emulsification Stability The emulsification stability of the composition was evaluated with a microscope (magnification 15 × 40).
◎: Unification of emulsified particles is not observed with a microscope ○: Unification of emulsified particles is hardly observed with a microscope Δ: Unification of emulsified particles is slightly observed with a microscope Is recognized

(3) Evaluation criteria for smoothness of smoothness Ten test panelists applied the test material to the face by hand, and the smoothness at that time was evaluated according to the following criteria.
◎: Eight or more panelists recognized that the smoothness was smooth. ○: Six or more panelists and less than eight recognized that the smoothness was smooth. △: Three or more panelists recognized that the smoothness was smooth. ×: Less than 3 panelists recognized that the spread was smooth

(4) Evaluation criteria for stickiness A test panel was manually applied to the face by 10 professional panelists, and the stickiness at that time was evaluated according to the following criteria.
◎: More than 8 panelists recognized that there was no stickiness after use ○: 6 or more panelists recognized that there was no stickiness after use △: 3 or more panelists less than 6 people used after use X: no sticky feeling x: Less than 3 panelists recognized no sticky feeling after use

(Manufacturing method of Example 1)
1. Ingredients 1-7 are heated to 70 ° C., ingredient 8 is added and dispersed uniformly with a disper and kept at 70 ° C.
2. Components 11 to 14 and 16 to 18 are uniformly mixed with a disper and heated to 70 ° C.
3. Ingredient 10 is added to ingredients 1-8.
5 minutes after the operation of 4.3, the components 11 to 14 and 16 to 18 are added to the components 1 to 8 and emulsified, and the mixture is stirred and cooled to room temperature.
(Production method of Example 2)
1. Ingredients 1-7 are heated to 70 ° C., ingredient 8 is added and dispersed uniformly with a disper and kept at 70 ° C.
2. Components 11 to 14 and 16 to 18 are uniformly mixed with a disper and heated to 70 ° C.
3. Ingredient 10 is added to ingredients 1-8.
One minute after the operation in 4.3, the components 11 to 14 and 16 to 18 are added to the components 1 to 8 and emulsified, and the mixture is stirred and cooled to room temperature.
(Manufacturing method of Comparative Example 1)
1. Ingredients 1-7 are heated to 70 ° C., ingredient 8 is added and dispersed uniformly with a disper and kept at 70 ° C.
2. Components 11 to 14 and 16 to 18 are uniformly mixed with a disper and heated to 70 ° C.
3. Components 11 to 14 and 16 to 18 are added to components 1 to 8 and emulsified, and the mixture is stirred and cooled to room temperature.
(Manufacturing method of Comparative Example 2)
1. 10 is added to components 1 to 7 and heated to 70 ° C., component 8 is added and uniformly dispersed with a disper, and kept at 70 ° C.
2. Components 11 to 14 and 16 to 18 are uniformly mixed with a disper and heated to 70 ° C.
3. Components 11 to 14 and 16 to 18 are added to components 1 to 8 and 10 to emulsify, and the mixture is stirred and cooled to room temperature.
(Manufacturing method of Comparative Example 3)
1. Ingredients 1-7 are heated to 70 ° C., ingredient 8 is added and dispersed uniformly with a disper and kept at 70 ° C.
2. Components 11 to 14 and 16 to 18 are uniformly mixed with a disper and heated to 70 ° C.
3. Ingredient 10 is added to ingredients 1-8.
10 minutes after the operation of 4.3, the components 11 to 14 and 16 to 18 are added to the components 1 to 8 and 10 to emulsify, and the mixture is stirred and cooled to room temperature.
(Manufacturing method of Comparative Example 4)
1. Ingredients 1 to 7 are heated to 70 ° C., ingredients 8 and 9 are added, and dispersed uniformly with a disper and kept at 70 ° C.
2. Components 11 to 13 and 16 to 18 are uniformly mixed with a disper and heated to 70 ° C.
3. Ingredient 10 is added to ingredients 1-9.
After 5 minutes after the operation of 4.3, the components 11 to 13 and 16 to 18 are added to the components 1 to 10 to emulsify, and the mixture is stirred and cooled to room temperature.
(Manufacturing method of Comparative Example 5)
1. Ingredients 1 to 7 are heated to 70 ° C., uniformly dispersed with a disper, and kept at 70 ° C.
2. Ingredients 11 to 18 are uniformly mixed with a disper and heated to 70 ° C.
3. Ingredient 10 is added to ingredients 1-7.
5 minutes after the operation in 4.3, the components 11 to 18 are added to the components 1 to 7 and emulsified, and the mixture is stirred and cooled to room temperature.

  From the results shown in Table 1, the oil-in-water emulsion of the present invention was good in powder dispersion stability, emulsion stability, smoothness and no stickiness. On the other hand, in Comparative Example 1 in which the component (A) was not blended, aggregation of the powder and coalescence of the emulsified particles were confirmed. Moreover, in Comparative Examples 2 and 3 in which the component (A) was added to the oil phase first or 10 minutes before emulsification, aggregation of the powder was confirmed. In Comparative Examples 4 and 5 in which powders having different average particle sizes were blended together in an oil phase or an aqueous phase, aggregation of the powder was confirmed.

(Manufacturing method of Examples 3-7)
1. Ingredients 1-7 are heated to 70 ° C., ingredient 8 is added and dispersed uniformly with a disper and kept at 70 ° C.
2. Ingredients 10 to 16 are uniformly mixed with a disper and heated to 70 ° C.
3. Ingredient 9 is added to ingredients 1-8.
5 minutes after the operation in 4.3, components 10 to 16 are added to components 1 to 9 to emulsify, and the mixture is stirred and cooled to room temperature.

  From the results shown in Table 2, each example was good, but the blending amount of component (A) was good in the range of 0.01 wt% to 1.0 wt%. Further, the blending amount of the component (A) was very good in the range of 0.1% by weight to 1.0% by weight.

(Manufacturing method of Example 8)
1. Ingredients 1-7 are heated to 70 ° C., ingredient 9 is added and dispersed uniformly with a disper, and kept at 70 ° C.
2. Ingredients 11 to 17 are mixed uniformly with a disper and heated to 70 ° C.
3. Ingredient 10 is added to ingredients 1-7, 9.
Five minutes after the operation of 4.3, the components 11 to 17 are added to the components 1 to 7, 9, and 10 to emulsify, and the mixture is stirred and cooled to room temperature.

  From the results shown in Table 3, each example was good, but the average primary particle size of the powder contained in the inner oil phase was very good at 100 nm or less.

(Manufacturing method of Examples 9-14)
1. Ingredients 1-6 are heated to 70 ° C., ingredient 7 is added and dispersed uniformly with a disper, and kept at 70 ° C.
2. Ingredients 9 to 15 are uniformly mixed with a disper and heated to 70 ° C.
3. Ingredient 8 is added to ingredients 1-7.
5 minutes after the operation of 4.3, components 9 to 15 are added to components 1 to 8 to emulsify, and the mixture is stirred and cooled to room temperature.

  From the results shown in Table 4, each example was good, but the blending amount of component (B) was good in the range of 0.1 to 15.0% by weight. Furthermore, the range of 1.0 to 10.0% by weight of component (B) was very good.

(Manufacturing method of Examples 15-20)
1. Ingredients 1-6 are heated to 70 ° C., ingredient 7 is added and dispersed uniformly with a disper, and kept at 70 ° C.
2. Ingredients 9 to 15 are uniformly mixed with a disper and heated to 70 ° C.
3. Ingredient 8 is added to ingredients 1-7.
5 minutes after the operation of 4.3, components 9 to 15 are added to components 1 to 8 to emulsify, and the mixture is stirred and cooled to room temperature.

  From the results shown in Table 5, each example was good, but the range of 0.1 to 15.0% by weight of component (C) was good. Furthermore, the range of 1.0 to 10.0% by weight of component (C) was very good.

* 1: SA-TTO-S-4 (10%) (manufactured by Miyoshi Kasei Co., Ltd., average particle diameter minor axis 0.015 μm, major axis 0.075 μm)
* 2: Titanium oxide AS-63D (manufactured by Tohoku Pigment, average particle size 0.25 μm)
* 3: Sodium stearoyl lactate (Musashino Chemicals)
* 4: Taipei CR-50 (Ishihara Sangyo Co., Ltd., average particle size 0.25 μm)
* 5: TTO-S-4 (10%) (manufactured by Ishihara Sangyo Co., Ltd., average particle diameter minor axis 0.015 μm, major axis 0.075 μm)

  Hereinafter, the present invention will be described in more detail with reference to other examples of the oil-in-water emulsion composition of the present invention, but the present invention is not limited thereto.

Example 21 Sunscreen Cream Ingredient Ingredient Amount (% by weight)
(1) Squalane 15
(2) Triethylhexanoin 3
(3) Dimethylpolysiloxane 2
(4) Decaglyceryl pentastearate 2
(5) Behenyl alcohol 2.5
(6) 2-Ethylhexyl paramethoxycinnamate 2
(7) Silicone-treated fine particle titanium oxide (* 1) 9
(8) Calcium stearoyl lactate (* 6) 0.7
(9) Carrageenan 1
(10) Xanthan gum 0.3
(11) Titanium oxide (* 4) 5
(12) Propylene glycol 7
(13) Paraoxybenzoic acid ester 0.3
(14) Purified water residue (15) Fragrance 0.2
Total 100
* 6: Belf (Musashino Industry Co., Ltd.)

(Production method)
1. Ingredients 1-6 are heated to 70 ° C., ingredient 7 is added and dispersed uniformly with a disper, and kept at 70 ° C.
2. Ingredients 9 to 14 are uniformly mixed with a disper and heated to 70 ° C.
3. Ingredient 8 is added to ingredients 1-7.
5 minutes after the operation in 4.3, components 9 to 14 are added to components 1 to 8 and emulsified.
5. Cool to 50 ° C., add component 15 and stir cool to room temperature.

Example 22 Sunscreen Latex Blending ingredients Blending amount (wt%)
(1) Squalane 7
(2) Triethylhexanoin 2
(3) Decaglyceryl pentastearate 1
(4) 2-Ethylhexyl paramethoxycinnamate 1
(5) Silicone-treated fine particle zinc oxide (* 7) 7
(6) Isostearoyl sodium lactate (* 8) 0.3
(7) Xanthan gum 0.5
(8) Titanium oxide (* 4) 3
(9) 1,3-butylene glycol 7
(10) Glycerin 3
(11) Paraoxybenzoic acid ester 0.2
(12) Purified water residue (13) Fragrance 0.1
Total 100
* 7: SI-UFZO-310 LHC (6%) (manufactured by Miyoshi Kasei Co., Ltd., average particle size 0.025 μm)
* 8: Resolact DIS (manufactured by Higher Alcohol Industry)

(Production method)
1. Ingredients 1 to 4 are heated to 70 ° C., ingredient 5 is added and dispersed uniformly with a disper and kept at 70 ° C.
2. Ingredients 7-12 are mixed uniformly with a disper and heated to 70 ° C.
3. Ingredient 6 is added to ingredients 1-5.
5 minutes after the operation of 4.3, components 7 to 12 are added to components 1 to 6 and emulsified.
5. Cool to 50 ° C., add component 13 and stir cool to room temperature.

Example 23 Oil-in-water emulsified foundation Blending ingredients Blending amount (% by weight)
(1) Squalane 4
(2) Decamethylcyclopentasiloxane 10
(3) Methylphenylpolysiloxane 5
(4) Stearic acid 3
(5) Behenyl alcohol 1
(6) Cetanol 0.5
(7) Glyceryl stearate 1
(8) Silicone-treated fine particle titanium oxide (* 1) 10
(9) Sodium stearoyl lactate (* 3) 0.6
(10) Xanthan gum 0.1
(11) Talc (* 9) 4
(12) Yellow iron oxide (* 10) 1.7
(13) Black iron oxide (* 11) 0.3
(14) Bengala (* 12) 0.8
(15) Titanium oxide (* 4) 3
(16) 1,2-pentanediol 0.5
(17) Glycerin 4
(18) Paraoxybenzoic acid ester 0.2
(19) Purified water residue (20) Fragrance 0.05
Total 100
* 9: JA-68R (Asada Flour Milling)
* 10: TAROX synthetic iron oxide LL-100 (manufactured by Titanium Industry Co., Ltd.)
* 11: TAROX synthetic iron oxide BL-100 (made by Titanium Industry Co., Ltd.)
* 12: TAROX synthetic iron oxide R-516-L (manufactured by Titanium Industry Co., Ltd.)

(Production method)
1. Ingredients 1-7 are heated to 70 ° C., ingredient 8 is added and dispersed uniformly with a disper and kept at 70 ° C.
2. Ingredients 10 to 19 are uniformly mixed with a disper and heated to 70 ° C.
3. Ingredient 9 is added to ingredients 1-8.
5 minutes after the operation in 4.3, components 10 to 19 are added to components 1 to 9 and emulsified.
5. Cool to 50 ° C., add component 20, stir cool to room temperature.

  Examples 21 to 23 all had excellent powder dispersion stability and good feel.

  INDUSTRIAL APPLICABILITY The present invention can be applied to an oil-in-water emulsified cosmetic having a good feel and excellent powder dispersion stability.

Claims (5)

(A) Acyl lactic acid and / or salt thereof (B) Powder whose surface is oleophilically treated in the inner oil phase (C) The powder is contained in the outer aqueous phase, and the component (A) is emulsified in the production process. A method for producing an oil-in-water emulsified cosmetic, which is added immediately before to an inner oil phase. (A) Content of acyl lactic acid and / or its salt is 0.01 to 1.0 weight%, The manufacturing method of the oil-in-water type emulsion cosmetics of Claim 1 characterized by the above-mentioned. (B) The method for producing an oil-in-water emulsified cosmetic according to claim 1 or 2, wherein the average primary particle size of the powder contained in the inner oil phase is less than 100 nm. (B) The method for producing an oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein the powder contained in the inner oil phase is titanium oxide and / or zinc oxide. (B) The content of the powder in the inner oil phase is 0.1 to 15.0% by weight, and the content of the powder in the (C) outer water phase is 0.1 to 15.0% by weight. The manufacturing method of the oil-in-water type emulsified cosmetics of any one of Claims 1-4 characterized by the above-mentioned.