KR101210371B1 - Manufacturing method of emulsion containing titanium dioxide and zinc oxide and cosmetic composition for protecting containing thereof - Google Patents

Abstract

PURPOSE: A method for preparing a stabilized emulsion of an inorganic UV protection agent is provided to reduce white residue and to improve usability. CONSTITUTION: A method for preparing a stabilized emulsion of an inorganic UV protection agent comprises: a step of adding 0.1-80 wt% of inorganic UV protection agent to 20-99.9% of a mixture solution containing dispersion agent and dispersion medium; a step of stirring the mixture and wetting; a step of dispersing the wetted emulsion using a 0.5-0.01 mm bead mill device at 1200-1800 rpm as a secondary dispersion; and a step of dispersing the emulsion using a 0.5-0.01 mm bead mill device at 1200-1800 rpm as a tertiary dispersion. The inorganic UV protection agent is titanium dioxide, zinc oxide, or a mixture thereof. [Reference numerals] (AA) Powder; (BB) H_2O; (CC) Dispersion Slurry; (DD) Al_2(SO_4)_3 solution; (EE,HH) Mixing; (FF) Potassium Stearate; (GG) Reaction; (II) Washing; (JJ) Drying; (KK) Atomizing; (LL) Atomizer; (MM) Products

Description

Stabilized oil dispersion preparation method of inorganic sunscreen and cosmetic composition comprising the same

The present invention relates to a method for preparing a stabilized oil dispersion of an inorganic sunscreen and a cosmetic composition comprising the same. More specifically, an inorganic sunscreen such as titanium dioxide or zinc oxide is added to a dispersant and a dispersion medium mixed solution, and the azimixer By preparing the dispersion by primary dispersion, secondary and tertiary dispersion with bead mill, the turbidity is improved to improve transparency, excellent stability, safety and usability of the dispersion method and a cosmetic composition comprising the same will be.

In general, ultraviolet rays are classified according to the length of the wavelength and the effect on the human body, and when they are irradiated excessively, it is known to cause various diseases and cancers. Ultraviolet radiation is long-wave ultraviolet (UV-A), which leads to premature aging and blackening of the skin, medium-wave ultraviolet (UV-B) that redens the skin and creates a sun burn, causing strong inflammation or blistering. It is divided into short-wave ultraviolet (UV-C), which is not transmitted to the ground by light that directly destroys life or by absorption by the ozone layer.

In the past, long-wavelength ultraviolet light was welcomed because of its high effectiveness in treating inflammation, but it has recently been pointed out as a target for promoting skin aging due to degeneration of proteins in the dermis, capillary expansion, and destruction of hexane (DNA).

Meanwhile, the medium wavelength ultraviolet rays, which are mostly absorbed by the epidermal part of the skin, are called harmful ultraviolet rays because they act rapidly on the epidermis and cause burns. The long-wave ultraviolet rays come into contact with the skin all year round, but they do not know themselves, so they do not know themselves.

The skin gets old.

In ultraviolet cosmetics, inorganic ultraviolet scattering agents, organic ultraviolet absorbers and the like are used as sunscreens. Organic UV absorbers mainly absorb medium wavelength UV rays, while inorganic UV absorbers mainly scatter long wavelength UV rays. UV absorbers protect the skin by absorbing ultraviolet light and changing it into energy such as reverse, vibration, fluorescence, and radicals. In contrast, the ultraviolet scattering agent blocks the ultraviolet rays by the refractive index of the light of the inorganic pigment.

Examples of the inorganic ultraviolet scattering agent include metal oxides such as titanium dioxide, zinc oxide, and cerium oxide, and composites thereof, among which titanium dioxide and zinc oxide are in the spotlight.

The titanium dioxide exists in two structures, Anatase and Rutile, and physical differences according to crystal structure and crystal structure are as follows. Anatase is a crystal in which the crystal units are connected to the vertices, and Rutile is a crystal in which the crystal units are connected to the side edges, and compared their properties in Table 1 below.

Comparison of Properties According to the Crystal Structure of Titanium Dioxide division Anatase Rutile color Dark brown, yellow, blue Black, Reddish Brown (Coarse Crystals)
Yellow (Thin Crystal) transparency opacity Transparency decision Tetragonal Tetragonal Striped color White Brown Hardness 5.5 ～ 6 6 ～ 6.5 importance 3.8 ～ 3.9 4.2 Band Gap Energy 3.23 eV 3.02 eV Where to use Photocatalyst material White paint, pigment

Titanium dioxide having the above properties is not only physically very stable, but also has a high refractive index of about 2.5 to 2.8 and a small particle size, which is excellent in chemical properties such as whiteness, hiding power, coloring power, and so on. If it is included in the product, just applying the skin will have the effect of sun protection and skin correction. In addition, when zinc oxide is used together, zinc oxide enhances the advantages of titanium dioxide, and light, heat, and chemical resistance are also excellent, so titanium dioxide and zinc oxide are frequently used as white pigments in BB cream, sun care, and makeup cosmetic compositions. Will be.

However, despite these effects, titanium dioxide and zinc oxide have a strong cohesiveness between particles, resulting in a rough grainy feeling when applied to the skin, resulting in a stiff feeling when applied to BB cream, sun care and makeup cosmetics, and high levels of titanium dioxide and zinc oxide. Whiteness has a problem of skin whitening phenomenon, and titanium dioxide and zinc oxide itself have limitations in application as BB cream, sun care and makeup cosmetics.

In order to solve the above problems as a cosmetic composition of titanium dioxide, "High concentration, high dispersion UV protection composition" of Korean Patent Registration No. 0758819, titanium dioxide powder as a dispersant, and cyclopentasiloxane as a dispersion medium, as a dispersant Fiji-10 dimethicone was used, but by dispersing the dispersant at a speed of 800 to 1,200 RPM using a bead mill, it was possible to suppress aggregation, phase separation or turbidity due to the high concentration of titanium dioxide.

However, the above-listed patent disperses titanium dioxide only once with a bead mill, uses cyclopentasiloxane alone as a dispersion medium, and uses PIG-10 dimethicone alone as a dispersant, thereby agglomeration, phase separation or clouding. It could not show sufficient effect.

Accordingly, the present invention is to solve the problems of the conventional BB cream, sun care, and makeup cosmetics using titanium dioxide and zinc oxide, and to disperse the titanium dioxide or zinc oxide using bead mill Fiji-10 Dimethicone and lauryl PIG-9 polydimethylsiloxyethyl dimethicone were prepared together with the dispersion medium cyclopentasiloxane and hexyllaurate to prepare an oil dispersion, so that titanium dioxide and zinc oxide were dispersed in a uniform particle size. It aims to do it.

In addition, since titanium dioxide and zinc oxide are dispersed in a uniform particle size, the turbidity of the oil dispersion is improved, the transparency is improved, the ultraviolet ray blocking effect is excellent, and the oil of titanium dioxide and zinc oxide having excellent stability, safety, and usability are excellent. An object of the present invention is to provide a dispersion and a cosmetic composition using the same.

The stabilized oil dispersion preparation method of the inorganic sunscreen according to the present invention comprises the first dispersion step of adding an inorganic sunscreen agent to a mixed solution of a dispersant and a dispersion medium, and agitating with an azimixer to wet the inorganic sunscreen oil dispersion. A secondary dispersion step of dispersing using a 0.5 to 0.01 mm bead mill apparatus, and a third dispersion step of dispersing the second dispersed oil dispersion using a 0.5 to 0.01 mm bead mill apparatus, wherein the inorganic system The sunscreen is titanium dioxide, zinc oxide or a mixture thereof, the dispersant is a mixture of PIG-10 dimethicone and lauryl PIG-9 polydimethylsiloxyethyl dimethicone, and the dispersion medium is cyclopentasiloxane and It is characterized in that the mixture of hexyl laurate.

Here, the temperature conditions of the first dispersion step is 25 ~ 30 ℃, the temperature conditions of the second and third dispersion step is characterized in that 35 ~ 40 ℃.

Here, the inorganic sunscreen is characterized in that the titanium dioxide treated with metal soap, zinc oxide treated with metal soap or a mixture thereof.

Herein, the inorganic sunscreen agent is characterized by mixing 0.1 to 80% by weight to 20 to 99.9% by weight of the dispersant and the dispersion medium mixed solution.

Here, the second dispersion step and the third dispersion step is characterized in that it is repeated two or more times.

In addition, the cosmetic composition according to the present invention is characterized in that it contains 0.1 to 50% by weight based on the total weight of the composition of the stabilized oil dispersion prepared by the above method.

According to the present invention, it is possible to overcome the disadvantages such as the feeling of use and turbidity when using titanium dioxide or zinc oxide itself as a BB cream, sun care, and makeup cosmetics, and also cosmetics the dispersion of titanium dioxide or zinc oxide according to the present invention When included in the composition, it provides useful effects such as excellent UV blocking effect, stability and usability.

1 is a manufacturing process of the oil dispersion according to the present invention.
Figure 2 is a manufacturing process of the metal soap treatment powder according to the present invention.
Figure 3a and 3b is a photograph of the primary, secondary bead mill apparatus according to the present invention.
4a to 4f are SEM images of Test Example 1 according to the present invention.
5a to 5d are particle size analysis results of Test Example 2 according to the present invention.
Figure 6a and Figure 6b is a photograph of stability of Test Example 3 according to the present invention.
7a to 7d is a photograph of the turbidity test results of Test Example 5 according to the present invention.
8A to 8H are graphs of the UV blocking index of Test Example 6 according to the present invention.

Hereinafter, with reference to the accompanying drawings the present invention will be described in detail.

In the stabilized oil dispersion preparation method of the inorganic sunscreen according to the present invention, as shown in FIG. A second dispersion step of dispersing the wet inorganic sunscreen oil dispersion using a 0.5 to 0.01 mm bead mill device, and a third dispersion step to disperse the secondary dispersed oil dispersion using a 0.5 to 0.01 mm bead mill device It is made, including. The first to third dispersion step can be made automatically to the system as shown in Figure 1, but is not necessarily limited thereto.

In the present invention, the dispersion is carried out three times as described above for more uniform dispersion of the inorganic sunscreen. Here, the bead mill device used in the secondary dispersion and the tertiary dispersion is a device for applying high energy to disperse and can operate a continuous cooling system. In addition, the reason for using the bead mill device at 0.5 to 0.01 mm is that the smaller the bead size is, the more evenly dispersed, and the speed is preferably set to 1200 to 1800 RPM. The reason is that at 1200 rpm or less or 1,800 rpm or more. This is because the product separation phenomenon occurs a lot because of even dispersion.

Herein, the inorganic sunscreen refers to titanium dioxide, zinc oxide, or a mixture thereof. Powders without surface treatment may be used, titanium dioxide treated with metal soap, zinc oxide treated with metal soap, or a mixture thereof. It may also be used, but is not limited thereto.

In addition, as the dispersant, a mixture of PIG-10 dimethicone and lauryl PIG-9 polydimethylsiloxyethyl dimethicone is used, and a mixture of cyclopentasiloxane and hexyllaurate is used as the dispersion medium.

In the present invention, as described above, the dispersant is limited to a mixture of PIG-10 dimethicone and lauryl PIG-9 polydimethylsiloxyethyl dimethicone, and the dispersion medium is limited to a mixture of cyclopentasiloxane and hexyllaurate. One reason is that a more uniform dispersion occurs under the conditions of the dispersant and the dispersion medium, thereby producing a stable oil dispersion. At this time, the mixing ratio of the dispersant PIG-10 dimethicone and lauryl PIG-9 polydimethylsiloxyethyl dimethicone is not limited, but is most preferably 1: 0.1 to 10 by weight, the dispersion medium is Although the mixing ratio of cyclopentasiloxane and hexyl laurate is not limited, it is most preferable to use a weight ratio of 0.05 to 0.5, because the dispersant content is too low and the dispersion is too high. to be.

In addition, the mixing ratio of the dispersant and the dispersion medium is preferably about 1: 4 as a weight ratio, but is not necessarily limited thereto.

In addition, the temperature conditions of the first dispersion step in the present invention is 25 ~ 30 ℃, the temperature conditions of the second and third dispersion step is preferably 35 ~ 40 ℃ bar, the reason is that the temperature in the process 50 If kept above ℃, the inorganic sunscreen will cause the deterioration of the coating material and the discoloration and odor of the final product may occur, so the temperature is kept constant.

In addition, the inorganic sunscreen is preferably dispersed by 0.1 to 80% by weight in 20 to 99.9% by weight of the dispersant and the dispersion medium mixed solution, when the dispersant and the dispersion medium mixed solution is less than 20% by weight 99.9 weight If the amount exceeds the amount of the inorganic sunscreen is small because there is no dispersion effect.

In addition, the second dispersion step and the third dispersion step may be carried out two or more times, more preferably five times, it is to produce a more uniform dispersion in the dispersion over a plurality of times.

On the other hand, the stabilized oil dispersion prepared by the above method can be included in the BB cream, sun care and makeup cosmetic composition bar, it may contain as much as 0.1 to 50% by weight relative to the total weight of the cosmetic composition, more preferably Is about 0.1 to 20% by weight. This is a content considering the formulation of the cosmetic composition, coating properties and the like.

Hereinafter, the present invention will be described in more detail with reference to the following Examples and Test Examples.

Example 1 Preparation of Oil Dispersion Type Titanium Dioxide

First, fine titanium dioxide having a 10 mu m average particle diameter was treated with the same metal soap as in the process of FIG. The treatment method is to disperse the titanium dioxide in water in a 1: 3 weight ratio, add 7% aqueous aluminum sulfate solution and mix to pH 3.0 ~ 4.0 (300 ~ 500rpm, stirred for 1 hour), and then again potassium Stearate was added to react at 80 ° C. and the pH was 6.5-7.5. (300-500 rpm 1 hour) Next, it was washed twice, dried at 60 ° C. for 3 days, and then treated with ato at 10000-15000 rpm. Mizing gave metal soap treated titanium dioxide.

And 50 g of titanium dioxide treated with the metal soap, 4 g of PIG-10 dimethicone as a dispersant, 4 g of Lauryl PIG-9 polydimethylsiloxyethyl dimethicone, 36 g of cyclopentasiloxane as a dispersion medium, and 8 g of hexyllaurate. After stirring slowly with an azimixer and gradually dispersing, the mixture was gradually added to the first bead mill and treated at a rate of 1800 RPM, followed by secondary dispersion, and then the second dispersed oil dispersion was treated at a rate of 1800 RPM with a second bead mill. By further dispersing, an oil dispersion of titanium dioxide, that is, oil dispersion titanium dioxide was produced. Here, as the primary and secondary bead mill apparatus, the apparatus of FIGS. 3A and 3B is used, and the apparatus is a apparatus for operating and dispersing a continuous cooling system while applying and dispersing with high energy.

Example 2 Preparation of Oil Dispersion Type Zinc Oxide

50 g of zinc oxide was treated with metal soap in the same manner as in Example 1, and dispersed to prepare oil-dispersed zinc oxide.

Comparative Example 1

A titanium dioxide oil dispersion was prepared in the same manner as in Example 1, by dispersing at 1800 RPM for 2 hours without using primary and secondary bead mills.

Comparative Example 2

A titanium dioxide oil dispersion was prepared in the same manner as in Example 2, by dispersing at 1800 RPM for 2 hours without using primary and secondary bead mills.

[Test Example 1] In order to confirm the dispersion state of the titanium dioxide and zinc oxide oil dispersion according to the present invention, Examples 1 and 2 and Comparative Examples 1 and 2 were observed under an electron microscope. And the results are shown in Figures 4a to 4f below (Fig. 4a is a comparative example 1, 4b is a first bead mill of Example 1, Figure 4c is a second bead mill of Example 1, 4d 4E is a photograph after the first bead mill of Example 2, and FIG. 4F is a photograph after the second bead mill of Example 2.

As can be seen from Figures 4a to 4d, the dispersion state of Comparative Example 1 and Comparative Example 2 without using the bead mill was not complete, it was confirmed that a part of the titanium dioxide and zinc oxide particles are aggregated. On the other hand, it was confirmed that the dispersion state of the bead mill treated Examples 1 and 2 was significantly improved.

[Test Example 2] Further, the particle sizes of Examples 1 and 2 and Comparative Examples 1 and 2 were analyzed, and the results are shown in FIGS. 5A to 5D. Particle size analysis was performed using a Malvern Mastersizer 3000 device as a wet laser diffraction method.

As can be seen in Figures 5a to 5d, it was confirmed that the particle size of the bead mill treated Examples 1 and 2 compared to Comparative Examples 1 and 2.

[Test Example 3] The stability of Example 1 and Example 2 was tested as follows. Stability of 90 days after storage of the dispersion of Examples 1 and 2 and Comparative Examples 1 and 2 at 4 ° C, 45 ° C, 50 ° C, CT (Cycling -4 to 40 ° C, once daily) and room temperature Was measured visually. The experimental results are shown in Table 2 below. And the photograph after dispersion immediately is shown to FIG. 6A and 6B.

Stability test results of Examples 1 and 2 and Comparative Examples 1 and 2 division
7 days 45 days 90 days Example 1 Comparative Example 1 Example 2 Comparative Example 2 Example 1 Comparative Example 1 Example 2 Comparative Example 2 Example 1 Comparative Example 1 Example 2 Comparative Example 2 Room temperature ◎ △ ◎ △ ◎ △ ◎ △ ◎ × ◎ × 4 ℃ ◎ △ ◎ △ ◎ △ ◎ △ ◎ × ◎ × CT ◎ △ ◎ × ◎ × ◎ × ◎ × ◎ × 45 ° C ◎ × ◎ × ◎ × △ × ◎ × △ × 60 ° C ◎ × △ × ◎ × △ × ◎ × △ ×

◎: not separated, △: slightly separated, ×: much separated

As can be seen from the above results, it was found that Examples 1 and 2 were not separated for 90 days or more even at a high temperature of 50 ° C. than Comparative Examples 1 and 2 and were stable.

In addition, even when confirming the precipitation as shown in Figs. 6a (oil dispersion of titanium dioxide) to 6b (oil dispersion of zinc oxide), it was confirmed that the oil dispersion dispersed through Bead Mills 1 and 2 hardly caused precipitation. Could.

[Test Example 4]

Human patch tests were performed to determine the skin irritation associated with the safety of the compositions according to the invention. In the upper arm of 30 women with healthy skin, propylene glycol and purified water were patched for 24 hours using the oil dispersions and the controls of Examples 1 and 2 and Comparative Examples 1 and 2, respectively. Subsequently, after removing it and measuring skin irritation, the skin reaction was examined again after 24 hours and 48 hours. Criterion and skin irritation calculation formula of the skin irritation is as follows, the results are shown in Table 3 below.

Criteria-: No erythema or unusual phenomenon

     +-: Slightly reddish

      +: Significantly redder than the surroundings

     ++: Severe reddening and swelling around

(Stimulus calculation formula)

Skin irritation test results of Examples 1 and 2 and Comparative Examples 1 and 2. sample The number of the subjects When to investigate Judgment result Irritation degree (%) ++ + +- - Example 1
30 persons Immediately after removal 0 people 0 people 2 people 28 people 6.67 30 persons 24 hours later 0 people 1 person 3 people 26 people 16.13 30 persons 48 hours later 0 people 1 person 3 people 26 people 16.13 Example 2
30 persons Immediately after removal 0 people 0 people 1 person 29 people 3.33 30 persons 24 hours later 0 people 0 people 2 people 28 people 6.67 30 persons 48 hours later 0 people 0 people 2 people 28 people 6.67 Comparative Example 1 30 persons Immediately after removal 0 people 1 person 3 people 26 people 16.13 30 persons 24 hours later 0 people 1 person 4 people 25 persons 19.35 30 persons 48 hours later 0 people 1 person 4 people 25 persons 19.35 Comparative Example 2 30 persons Immediately after removal 0 people 0 people 2 people 28 people 6.67 30 persons 24 hours later 0 people 1 person 3 people 26 people 16.13 30 persons 48 hours later 0 people 1 person 4 people 25 persons 19.35 Propylene
Glycol 30 persons Immediately after removal 0 people 2 people 5 people 23 persons 28.13 30 persons 24 hours later 0 people 2 people 5 people 23 persons 28.13 30 persons 48 hours later 0 people 2 people 5 people 23 persons 28.13 Purified water 30 persons Immediately after removal 0 people 0 people 1 person 29 people 3.33 30 persons 24 hours later 0 people 0 people 0 people 30 persons 0.00 30 persons 48 hours later 0 people 0 people 0 people 30 persons 0.00

According to Table 3, the titanium dioxide and zinc oxide dispersion according to the present invention was found to have little skin irritation.

[Formulation Example 1 and Comparative Formulation Example 1]

Formulation Example 1 and Comparative Formulation Example 1 were prepared in a BB cream formulation as a compounding ratio as shown in Table 4 below.

Formulation ratio of Formulation Example 1 and Comparative Formulation Example 1 (unit: g) Raw material name (SPF 35, PA ++) Formulation Example 1 Comparative Formulation Example 1 Octylmethoxy cinnamate 7.5 7.5 Isoamylmethoxycinnamate 2.0 2.0 Titanium oxide 0 2.0 Zinc oxide 0 4.0 Piggy-10 Dimethicone 0 0.48 Lauryl Fiji-9 Polydimethylsiloxyethyl Dimethicone 0 0.48 Cyclopentasiloxane 0 4.08 Hexyl laurate 0 0.96 Titanium Dioxide Dispersion of Example 1 4.0 0 Zinc Oxide Oil Dispersion of Example 2 8.0 0 Purified water 49.0 49.0 Arbutin 2.0 2.0 Adenosine 0.04 0.04 Disodium iodide 0.02 0.02 Butylene Glycol 5.0 5.0 Sodium chloride 1.2 1.2 Ferrous Ferric Oxide / Dimethicone Suitable amount Suitable amount Hydrated Ferric Oxide / Dimethicone Suitable amount Suitable amount Ferric Oxide / Dimethicone Suitable amount Suitable amount Cetyl hexanoate 3.0 3.0 Cyclomethicone 10.0 10.0 Dimethicone 1.0 1.0 Dimethicone Copolyol 2.5 2.5 Sorbitan isostearate 0.3 0.3 Calcium stearate 1.0 1.0 Ozokerite 0.5 0.5 Tocopheryl acetate 0.5 0.5 Methylparaben 0.25 0.25 Propylparaben 0.1 0.1 Phenoxyethanol 0.3 0.3 Spices Suitable amount Suitable amount

Formulation Example 2 and Comparative Formulation Example 2

As a formulation ratio as shown in Table 5, Formulation Example 2 and Comparative Formulation Example 2 were prepared in the formulation of sunscreen.

Formulation ratio of Formulation Example 2 and Comparative Formulation Example 2 (unit: g) Raw material name (SPF 50+, PA +++) Formulation Example 2 Comparative Formulation Example 2 Octylmethoxy cinnamate 7.5 7.5 Isoamylmethoxycinnamate 3.0 3.0 Disodiumphenyldibenzimidazoletesulfonate 3.0 3.0 Titanium oxide 0 3 Zinc oxide 0 4 Piggy-10 Dimethicone 0 0.56 Lauryl Fiji-9 Polydimethylsiloxyethyl Dimethicone 0 0.56 Cyclopentasiloxane 0 4.76 Hexyl laurate 0 1.12 Titanium Dioxide Dispersion of Example 1 6 0 Zinc Oxide Oil Dispersion of Example 2 8 0 Purified water 45 45 Disodium iodide 0.02 0.02 Butylene Glycol 5.0 5.0 Sodium chloride 1.2 1.2 Cetyl hexanoate 3.0 3.0 Cyclomethicone 10.0 10.0 Dimethicone 1.0 1.0 Dimethicone Copolyol 2.5 2.5 Sorbitan isostearate 0.3 0.3 Calcium stearate 1.0 1.0 Ozokerite 0.5 0.5 Tocopheryl acetate 0.5 0.5 Methylparaben 0.25 0.25 Propylparaben 0.1 0.1 Phenoxyethanol 0.3 0.3 Spices Suitable amount Suitable amount

Formulation Example 3 and Comparative Formulation Example 3

Formulation Example 3 and Comparative Formulation Example 3 were prepared as a formulation of the makeup base as a compounding ratio as shown in Table 6 below.

Formulation ratio of Formulation Example 3 and Comparative Formulation Example 3 (unit: g) Raw material name (SPF35, PA ++) Formulation Example 3 Comparative Formulation Example 3 Octylmethoxy cinnamate 7.0 7.0 Titanium oxide 0 6.0 Zinc oxide 0 2.0 Piggy-10 Dimethicone 0 0.64 Lauryl Fiji-9 Polydimethylsiloxyethyl Dimethicone 0 0.64 Cyclopentasiloxane 0 5.44 Hexyl laurate 0 1.28 Titanium Dioxide Dispersion of Example 1 12 0 Zinc Oxide Oil Dispersion of Example 2 4 0 Chromium Oxide Green / Dimethicone Suitable amount Suitable amount Iron oxide (CI77492) / dimethicone Suitable amount Suitable amount Talc / triethoxycaprylylsilane Suitable amount Suitable amount Aluminum hydroxide Suitable amount Suitable amount Hydrated silica Suitable amount Suitable amount Purified water 42 42 Disodium iodide 0.02 0.02 Butylene Glycol 5.0 5.0 Sodium chloride 1.2 1.2 Caprylic / Capric Triglycerides 4.0 4.0 Cyclomethicone 15.0 15.0 Squalane 1.0 1.0 Dimethicone 1.0 1.0 Dimethicone Copolyol 2.5 2.5 Sorbitan isostearate 1.0 1.0 Calcium stearate 1.0 1.0 Ozokerite 0.3 0.3 Tocopheryl acetate 0.5 0.5 Methylparaben 0.25 0.25 Propylparaben 0.1 0.1 Phenoxyethanol 0.3 0.3 Spices Suitable amount Suitable amount

Formulation Example 4 and Comparative Formulation Example 4

Formulation Example 4 and Comparative Formulation Example 4 were prepared as a liquid foundation formulation as a compounding ratio as shown in Table 7 below.

Formulation ratio of Formulation Example 4 and Comparative Formulation Example 4 (unit: g) Raw material name (SPF18, PA ++) Formulation Example 4 Comparative Formulation Example 4 Octylmethoxy cinnamate 1.5 1.5 Titanium oxide 0 8.0 Zinc oxide 0 2.0 Piggy-10 Dimethicone 0 0.8 Lauryl Fiji-9 Polydimethylsiloxyethyl Dimethicone 0 0.8 Cyclopentasiloxane 0 6.8 Hexyl laurate 0 1.6 Titanium Dioxide Dispersion of Example 1 16 0 Zinc Oxide Oil Dispersion of Example 1 4 0 Ferrous Ferric Oxide / Dimethicone Suitable amount Suitable amount Hydrated Ferric Oxide / Dimethicone Suitable amount Suitable amount Ferric Oxide / Dimethicone Suitable amount Suitable amount Purified water 33 33 Disodium iodide 0.02 0.02 Butylene Glycol 5.0 5.0 glycerin 2.0 2.0 Magnesium sulfate 0.3 0.3 Octyldodecyl stearoylstearate 1.0 1.0 Cyclomethicone 21.0 21.0 Dimethicone 8.0 8.0 Dimethicone Copolyol 2.5 2.5 Sorbitan stearate 0.5 0.5 Calcium stearate 1.0 1.0 Beads wax 2.0 2.0 Tocopheryl acetate 0.5 0.5 Methylparaben 0.25 0.25 Propylparaben 0.1 0.1 Phenoxyethanol 0.3 0.3 Spices Suitable amount Suitable amount

[Test Example 5]

In order to observe the effect of reducing the turbidity by improving the transparency of the titanium dioxide and zinc oxide dispersion according to the present invention, the turbidity of the cosmetic composition of Example 1, Comparative Example 1 and Formulation Example 1 and Comparative Formulation Example 1 Was measured. The measuring method was uniformly coated with an applicator (30㎛) of Example 1, Comparative Example 1, Formulation Example 1 and Comparative Formulation Example 1 on the black artificial leather which can confirm the cloudy turbidity well. The whiteness was measured on a black surface (L: 24.27, a: -0.20, b: -0.43) for measuring the concealment rate using a color limiter and compared. The experimental results are shown in Table 8 below and FIGS. 7A to 7D. (FIG. 7A is Example 1, FIG. 7B is Comparative Example 1, and FIG. 7C is Formulation Example 1, and FIG. 7D is a photograph showing Comparative Formulation Example 1.)

Whiteness measurement result of Test Example 5. Example 1 Comparative Example 1 Formulation Example 2 Comparative Formulation Example 2 L 45.46 48.26 40.02 42.82 a +0.68 +0.24 +0.44 +0.10 b -6.88 -3.24 -4.46 -2.12

The Lab is an internationally standardized color system standardized by the Commission Internationale del'Eclairage (CIE), where the L value is light and dark. The value of a means the relationship between green and red. If it goes to the negative side, it is green, and if it goes to the positive side, it is red. The value of b means the relationship between blue and yellow, and if it goes to the negative side, it is blue. The larger the L value, the stronger the turbidity, indicating that the black surface of the background appears closer to white.

And as can be seen in Figure 7a to 7d, it was confirmed that the whitening effect of the cosmetic composition of Formulation Example 1 is improved transparency compared to the cosmetic composition of Comparative Formulation Example 1 significantly reduced the clouding effect.

[Test Example 6]

Powdered titanium dioxide has a high hiding power due to the high refractive index of about 2.5 ~ 2.8 and very small particle diameter, and when it is contained in the BB cream, sunscreen and makeup products, it has a sunscreen effect only by applying the skin.

Therefore, the titanium dioxide and zinc oxide dispersed in the dispersant according to the present invention, PIG-10 dimethicone and lauryl PIG-9 polydimethyl siloxyethyl dimethicone and the dispersion medium cyclopentasiloxane and hexyl laurate In order to confirm the same effect, a transparent plastic tape (Transpore Tape; 3M, USA) was attached to the prepared cast, and then the cosmetic composition of Formulation Examples 1-4 and Comparative Formulation Examples 1-4 sample 2mg / cm After coating with ² , the UV blocking effect was measured with a UV meter (SPF 290 Analyzer). And the results are shown in Table 9 and Figures 8a to 8h.

SPF and PA Value Measurement by Test Example 6 Formulation Example 1 Comparative Formulation Example 1 Formulation Example 2 Comparative Formulation Example 2 SPF Value 42 35 50 42 PA Value +++ ++ +++ +++ Formulation Example 3 Comparative Formulation Example 3 Formulation Example 4 Comparative Formulation Example 4 SPF Value 40 32 25 20 PA Value +++ ++ ++ ++

Table 9 and the results of FIGS. 8A to 8H (8a is Formulation Example 1, 8b is Comparative Formulation Example 1, 8c is Formulation Example 2, 8d is Comparative Formulation Example 2, 8e is Formulation Example 3, 8f is Comparative Formulation Example 3, 8 g is from Formulation Example 4, 8h is Comparative Formulation Example 4), and the formulation example according to the present invention is about 20.0 to less than the UV protection index of Comparative Formulation example containing powdered titanium dioxide and zinc oxide having the same content. It was confirmed that the UV protection index was high about 25.0%.

As described above, the present invention has been described as the above embodiment, but it is obvious that various modifications can be made without departing from the scope and spirit of the present invention.

Claims (6)

A first dispersion step of adding 0.1 to 80% by weight of an inorganic sunscreen to 20 to 99.9% by weight of a mixed solution containing a dispersant and a dispersion medium, followed by stirring and moistening with an azimixer;
A second dispersion step of dispersing the wet inorganic sunscreen oil dispersion at a speed of 1200 to 1800 RPM using a 0.5 to 0.01 mm bead mill;
Including the third dispersion step of dispersing the second dispersed oil dispersion at a speed of 1200 ~ 1800RPM using a 0.5 ~ 0.01mm bead mill device,
The inorganic sunscreen is titanium dioxide, zinc oxide or a mixture thereof,
The dispersant is a mixture of PHYG-10 dimethicone and lauryl PIG-9 polydimethylsiloxyethyl dimethicone in a ratio of 0.1 to 10 by weight,
The dispersion medium is a mixture of cyclopentasiloxane and hexyl laurate in a weight ratio of 0.05 to 0.5,
The temperature condition of the first dispersion step is 25 ~ 30 ℃, the temperature conditions of the second and third dispersion step is 35 ~ 40 ℃,
The mixing ratio of the dispersant and the dispersion medium is 1: 4 weight ratio,
The second dispersion step and the third dispersion step is a stabilized oil dispersion production method of the inorganic sunscreen, characterized in that repeated five times. delete delete delete delete BB cream, sun care makeup cosmetic composition comprising a stabilized oil dispersion prepared by the method of claim 1 based on 0.1 to 50% by weight based on the total weight of the composition.

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