WO2019027164A1 - Cosmetic composition comprising pigment and method for producing same - Google Patents

Abstract

The present invention relates to a cosmetic composition comprising a pigment, and a method for producing the same, characterized in that the particle size distribution of the pigment, which is coated with a coating layer comprising an oil phase and a water phase, is uniformized, thereby improving the feeling of using the cosmetic composition and the functionality thereof.

Description

Cosmetic composition comprising pigment and method for producing the same

This application claims the benefit of priority based on Korean Patent Application No. 10-2017-0097300, filed on July 31, 2017, which is incorporated herein by reference in its entirety.

The present invention relates to a cosmetic composition comprising a pigment, which is improved in feeling and functionality through the uniformization of the particle size distribution of the pigment, and a process for producing the same.

In general, make-up cosmetics are used for the purpose of concealing the defects of the skin using the pigment, giving a beautiful color and protecting the skin from ultraviolet rays, and furthermore, it is used for a secondary purpose of giving psychological stability feeling by skin beautification and skin protection function .

Although the makeup cosmetic material has a slight difference depending on the form of the emulsified type, the dispersed type, and the powder type, titanium dioxide (TiO2) is the most widely used as a representative white pigment for color impartation and skin defect. However, in the case of titanium dioxide which is not surface-modified, the better the function of concealing skin defect, the more the re-agglutination phenomenon occurs, causing the phenomenon of bundle after make-up. In particular, the structure is a tetrahedron, This is very bad and causes deterioration of usability.

In order to overcome such disadvantages, a method of coating or compounding the surface of the pigment with various substrates has been used. Conventionally, surface treatment is performed with silicon, fluorine, amino acid, chitosan, metal salt or the like to improve functions such as adhesion and persistence. However, the spreadability within the formulation, the prevention of re-aggregation, and the prevention of cosmetic collapse after use or over time are still unsatisfactory.

For example, Japanese Patent No. 5667330 discloses a multi-layer coated pigment in which the coating layer comprises a high refractive index coating (TiO2, 10-100 nm thick), a colorless coating (20-100 nm thick) and a high refractive index coating (TiO2, 10-100 nm thickness). However, since a method of uniformizing the particle size distribution of the pigment including the coating is not proposed, it may be difficult to secure the feeling of use and functionality when applied to cosmetics .

In addition, US Patent Publication No. 2004-0258640 discloses an interference pigment which can be used in cosmetics for skin flaw cover, and discloses a multi-layer coated pigment. However, since the particle size of the pigment is improved, Is not mentioned.

Therefore, it is urgently required to develop a cosmetic composition manufacturing technology that can improve the feel and functionality when applied to the skin by improving the particle size distribution while including a coating layer capable of protecting the pigment.

[Prior Art Literature]

[Patent Literature]

(Patent Document 1) Japanese Patent No. 5667330, " Silver Gloss Pigment "

(Patent Document 2) US Patent Publication No. 2004-0258640, " INTERFERENCE PIGMENT AND COMPOSITION INCLUDING SAME "

The inventors of the present invention conducted various studies to solve the above problems. As a result, the present inventors have found that a cosmetic composition having uniform particle size distribution can be obtained by dispersing a pigment coated with a double coating layer comprising an oil phase layer and a water phase layer using a spinning dispersing device And the cosmetic composition thus prepared was adhered thinly when applied to the skin to give the skin luster and moisturization, and it was confirmed that the covering force and the agglomeration after the lapse of time were prevented.

Accordingly, an object of the present invention is to provide a cosmetic composition comprising a pigment having improved stability.

Another object of the present invention is to provide a method for producing a cosmetic composition comprising a pigment having a uniform particle size distribution.

In order to achieve the above object, the present invention provides a cosmetic composition comprising pigment particles coated with a coating layer comprising an oil phase and an aqueous phase.

The particle size of the pigment may be 0.1 탆 to 1 탆.

The pigment may be selected from the group consisting of titanium dioxide (TiO ₂ ), micro TiO ₂ , zinc oxide (ZnO), micro ZnO, iron oxide, alumina, Al ₂ O ₃ ), Barium sulfate (BaSO ₃ ), silica (SiO ₂ ), talc, kaolin, sericite, and mica.

The oil phase may include at least one member selected from the group consisting of Dimethicone, Methicone, Hydrogen Dimethicone, Caprylic Silanes and Fluorine-based Silicone.

In addition, the water phase may include at least one selected from the group consisting of lecithins and silicas.

Further, the coating layer may be a single coating layer comprising a mixture of oil phase and water phase.

Further, the coating layer may be a double coating layer including an oil phase layer and a water phase layer.

The cosmetic composition may be formulated in the form of water dispersion, oil dispersion, water in oil (W / O) or oil in water (O / W).

The cosmetic composition may be formulated in the form of a liquid, a cream or a cake-like foundation, a make-up base cosmetic, or a UV-blocking cosmetic.

The present invention also provides a process for producing a cosmetic composition comprising dispersing a pigment and an emulsifier in an aqueous phase and dispersing the same using a rotating dispersing machine to form a coating layer comprising oil phase and water phase on the surface of the pigment do.

The rotating speed of the dispersing device may be 5 to 50 m / s.

According to the cosmetic composition of the present invention, since the surface of the pigment particles contained in the cosmetic composition is coated with a double coating layer comprising an oil phase layer and a water phase layer, a thin and uniform cosmetic film can be formed when applied to the skin, A moisturizing feeling can be given.

In addition, the cosmetic composition according to the present invention can maintain the viscosity at an appropriate level while uniformizing the particle size distribution of the pigment by using a thin film swirling type high-speed mixer during the manufacturing process.

Since the cosmetic composition of the present invention is applied to skin-based cosmetics such as cushions, facts, and foundations, the covering power is improved, and after the lapse of time, The problem can be improved.

1A and 1B are schematic diagrams of a cosmetic composition comprising a pigment according to the present invention.

Fig. 2 is a schematic view of a process of dispersing pigment particles using a thin film swirling type high-speed mixer according to the method for producing a cosmetic composition of the present invention.

3A and 3B are microscope photographs of the cosmetic composition prepared in Example 1 and Comparative Example 1, respectively.

4 is a graph showing the results of viscosifi- cation rate measurement for the cosmetic compositions of Examples 1 and 2 and Comparative Examples 1 and 2.

Fig. 5 is a graph showing the results of sensory evaluation of the cosmetic composition of the liquid foundation formulation according to Examples 1, 2, and Comparative Examples 1 and 2. Fig.

Hereinafter, the present invention will be described in detail in order to facilitate understanding of the present invention.

The terms and words used in the present specification and claims should not be construed in an ordinary or dictionary sense and the inventor can properly define the concept of the term to describe its invention in the best possible way It should be construed as meaning and concept consistent with the technical idea of the present invention.

A cosmetic composition comprising a pigment

The present invention relates to a cosmetic composition comprising a pigment, and relates to a cosmetic composition having uniform particle size distribution of pigment particles contained in a cosmetic composition.

The cosmetic composition according to the present invention is particularly useful as a cosmetic composition for base makeup of the skin, which is capable of forming a thin cosmetic film when applied to the skin, imparting gloss and moisturization to the skin, It is possible to prevent lifting or aggregation after elapse of time.

The cosmetic composition according to the present invention may comprise pigment particles coated with a coating layer comprising an oil phase and an aqueous phase.

The pigment contained in the cosmetic composition according to the present invention has a particle size of 0.1 to 1 占 퐉, and when the particle size of the cosmetic composition is less than 0.1 占 퐉, there is a problem in the reliability analysis of the particle size analyzer. Lt; / RTI >

In the present invention, the pigment plays a role of enhancing coverage, hiding power, durability, oil repellency, water repellency and usability, such as titanium dioxide, titanium dioxide (TiO ₂ ), micro titanium oxide (Micro TiO ₂ ) zinc zinc oxide (zinc oxide, ZnO), micro-oxidation (micro ZnO), iron oxide (ⅱ) (FeO (ⅱ) ), iron oxide, aluminum oxide _{(alumina, Al 2 O 3)} , barium sulfate (barium sulfate, BaSO ₃₎ , Silica, SiO ₂ , talc, kaolin, sericite, and mica. Particularly, when titanium oxide is used, it may be more advantageous in terms of coverage and hiding power. The iron oxide may be iron oxide (II) (FeO (II)), iron oxide (III) (FeO (III)) or iron oxide (IV) (FeO (IV)).

In the present invention, the coating layer formed on the surface of the pigment may be in the form of a single layer or a double layer.

1A and 1B are schematic diagrams of a cosmetic composition comprising a pigment according to the present invention.

Referring to FIG. 1A, a pigment 1 including an oil phase and an aqueous phase contained in a cosmetic composition according to the present invention is a form in which a single coating layer 20 is formed on the surface of a pigment particle 10, And a mixture of water and water.

1B, the pigment 1 including the oil phase and the water phase contained in the cosmetic composition according to the present invention comprises a pigment layer 10 having an oil phase layer 30a and a water phase layer 30b, Coating layer 30 may be coated.

At this time, the weight ratio of the oil phase layer to the water phase layer may be 1: 0.1 to 1, preferably 1: 0.3 to 0.6. If the weight ratio of the water phase to the oil phase is less than 0.1, If it is more than 1, there may be a problem in terms of dispersibility.

In the present invention, the oil phase layer serves to improve water repellency and dispersibility in oil phase, and is selected from the group consisting of Dimethicone, Methicone, Hydrogen Dimethicone, Caprylic Silanes and Fluorine-based Silicones In particular, when the oil phase layer is made of triethoxycaprylyl silane (TRIETHOXYCAPRYLYLSILANE), it may be advantageous in terms of coverage and dispersibility.

In the present invention, the water-repellent layer serves to improve the oil-repellency and dispersibility in water, and may include at least one member selected from the group consisting of lecithins and silicas. Particularly, May be advantageous from the viewpoint of dispersibility when it is made of hygrogenated lecithin.

In the present invention, the content of the pigment is 0.01 to 40% by weight, preferably 1 to 10% by weight based on the total weight of the cosmetic composition. If the content of the pigment is less than the above range, the covering power and hiding power may be poor.

The cosmetic composition of the present invention can be applied to various cosmetics, especially skin cosmetics such as cushion and emulsion foundation, as well as solid cosmetics such as loose powder, powder foundation, compression foundation, ball touch, eye shadow, , Body powders and other solid form cosmetics. By "solid" it is meant that the composition is solid at 25 ° C. and is non-flowable.

The cosmetic composition of the present invention can be formulated in the form of water dispersion, oil dispersion, water in oil (W / O) or oil in water (O / W).

In addition, the cosmetic composition of the present invention can be formulated in the form of a liquid, a make-up base cosmetic, or a UV-blocking cosmetic in the form of a liquid, a cream or a cake.

In addition, the cosmetic composition of the present invention may be prepared in any form conventionally produced in the art, and examples thereof include solutions, suspensions, emulsions, pastes, gels, creams, lotions, powders, soaps, surfactants- Containing cleansing, oil, powder foundation, emulsion foundation, wax foundation and spray, but is not limited thereto. More specifically, it can be manufactured in the form of a soft lotion, a nutritional lotion, a nutritional cream, a massage cream, an essence, an eye cream, a cleansing cream, a cleansing foam, a cleansing water, a pack, a spray or a powder.

When the formulation of the present invention is a paste, cream or gel, an animal oil, vegetable oil, wax, paraffin, starch, tracant, cellulose derivative, polyethylene glycol, silicone, bentonite, silica, talc or zinc oxide may be used as the carrier component .

In the case where the formulation of the present invention is a powder or a spray, lactose, talc, silica, aluminum hydroxide, calcium silicate or polyamide powder may be used as a carrier component. Especially, in the case of a spray, a chlorofluorohydrocarbon, / Propane or dimethyl ether.

When the formulation of the present invention is a solution or an emulsion, a solvent, a solubilizing agent or an emulsifying agent is used as a carrier component, and examples thereof include water, ethanol, isopropanol, ethylcarbonate, ethyl acetate, glycerin, carbomer, benzyl alcohol, Propylene glycol, 1,3-butyl glycol oil, glycerol aliphatic ester, caprylic capric triglyceride, hydrone- nylidene polydecene, cetearyl glucoside, sorbidestearate, polyethylene glycol, cetearyl alcohol and the like have.

In the case where the formulation of the present invention is a suspension, a carrier such as water, a liquid diluent such as ethanol or propylene glycol, a suspending agent such as ethoxylated isostearyl alcohol, polyoxyethylene sorbitol ester and polyoxyethylene sorbitan ester, Cellulose, aluminum metahydroxide, bentonite, agar or tracant, etc. may be used.

When the formulation of the present invention is an interfacial active agent-containing cleansing, the carrier component may include aliphatic alcohol sulfate, aliphatic alcohol ether sulfate, sulfosuccinic acid monoester, isethionate, imidazolinium derivative, methyltaurate, sarcosinate, fatty acid amide Ether sulfates, alkylamidobetaines, aliphatic alcohols, fatty acid glycerides, fatty acid diethanolamides, vegetable oils, lanolin derivatives, or ethoxylated glycerol fatty acid esters.

Process for preparing cosmetic composition containing pigment

The present invention also relates to a process for producing a cosmetic composition comprising dispersing a pigment and an emulsifier in an aqueous phase and dispersing the same using a rotating dispersing machine to form a coating layer comprising oil phase and water phase on the surface of the pigment will be.

Fig. 2 is a schematic view of a process of dispersing pigment particles using a thin film swirling type high-speed mixer according to the method for producing a cosmetic composition of the present invention.

Referring to FIG. 2, a velocity difference is generated due to the centrifugal force generated by turning the treatment liquid around the inner wall of the container, thereby releasing secondary agglomeration and preventing re-aggregation, so that the particle size distribution of the pigment can be uniform.

The rotation speed of the dispersing device may be from 5 m / s to 50 m / s. If the rotation speed is less than 5 m / s, the improvement of the particle size distribution is insignificant. When the rotation speed is more than 50 m / Can be deformed.

In addition, the emulsifier is added so that the pigment can be dispersed in the aqueous phase, and a surfactant having a high hydrophile-liphophile balance (HLB) of 9 to 15 is used as an O / W (oil in water) 30 Hydrogenated Castor Oil, glyceryl Stearate and PEG-100 Stearate, Polyethylene Glycol Monoisostearate, Cetearyl Olivate, / Sorbitan Olivate, Hydrogenated Lecithin, Arachidyl Alcohol and Behenyl Alcohol and Arachidyl Glucoside, Cetearyl Alcohol, ) / Cetearyl Glucoside, Polysorbate 80, and Polysorbate 60 may be included. have.

The emulsifier may be contained in an amount of 0.1 to 1.5% by weight based on the total weight of the cosmetic composition. When the content of the emulsifier is within the above range, the dispersibility of the pigment particles may be excellent.

The cosmetic composition of the present invention produced according to the above-described production method can be advantageous for formulation into various formulations since the particle size distribution is uniform and the viscosity retention rate is high even after prolonged time.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the following examples should not be construed as limiting the scope of the present invention, and should be construed to facilitate understanding of the present invention.

Example  One

A cosmetic composition having a liquid foundation formulation of W / O type as shown in Table 1 below was prepared.

TiO ₂ having a particle size of 0.3 탆 to 0.5 탆 was added to a water-in-oil hydrogeled lecithin together with an emulsifier POLYSORBATE 80 and dispersed at a rotation speed of 30 m / s using a peel mixer as a thin film swirling type high speed mixer To prepare a liquid foundation formulation of a cosmetic composition comprising TiO ₂ pigment particles coated with oil and water.

At this time, the content of the TiO ₂ pigment particles was adjusted to 7 wt% based on the total weight of the cosmetic composition.

ingredient weight% Pigment particles (TiO ₂ having a particle diameter of 0.3 탆 to 0.5 탆) 7 Emulsifier (POLYSORBATE 80) One HYDROGENATED LECITHIN 0.5 Butylene glycol 3 Emulsifier (cetyl phage / piperazine-10/1 dimethicone) 3 Pigment particles (iron oxide coated with dimethicone) 5.0 Dimethicone Remainder Cyclopentasiloxane and PEG / PEG-19/19 dimethicone (Cyclopentasiloxane and PEG / PPG-19/19 dimethicone) 5.0 Disteardimonium Hectorite < RTI ID = 0.0 > 1.0 antiseptic Suitable amount Purified water Remainder

Example  2

The same procedure as in Example 1 was carried out except that the content of the TiO ₂ pigment particles was 10% by weight based on the total weight of the cosmetic composition.

Comparative Example  One

A cosmetic composition was prepared in the same manner as in Example 1, except that TiO ₂ pigment particles coated with oil phase and water phase were prepared using a ring mill instead of a thin film swirling type high speed mixer.

Comparative Example  2

A cosmetic composition comprising TiO ₂ pigment particles coated with an oil phase and a water phase was prepared in the same manner as in Example 2 except that a ring mill was used instead of the thin film swirling type high speed mixer.

Experimental Example  1: Measurement of particle size distribution

The cosmetic compositions of the liquid foundation formulations prepared in Example 1 and Comparative Example 1 were observed using a 3D laser microscope.

3A and 3B are microscope photographs of the cosmetic composition prepared in Example 1 and Comparative Example 1, respectively.

Referring to FIG. 3A, in Example 1, particles having a large size were hardly observed, whereas in FIG. 3B, particles having a large size were observed in Comparative Example 1. From this, it can be seen that, when a thin film swirling type high-speed mixer for dispersing pigment particles using the centrifugal force of a rotating dispersing device is used, the particle size distribution can be made uniform compared to the case of using the ring mill in the past.

Experimental Example  2: Long term stability experiment

For the cosmetic composition prepared in each of Examples 1, 2 and Comparative Examples 1 and 2, in order to measure the viscosity retention rate, each cosmetic composition was measured on the day of the first viscosity measurement, the first day, the seventh day, The viscosity of the composition was measured and the viscosity aging ratios for three months were compared.

4 is a graph showing the results of viscosifi- cation rate measurement for the cosmetic compositions of Examples 1 and 2 and Comparative Examples 1 and 2.

4 and Table 2, the cosmetic composition prepared in each of Examples 1 and 2 had a viscosity retention rate of about 96% for 3 months, and a viscosity of about 74% for 3 months in Comparative Example 2, It is difficult to apply to various formulations because it maintains 20,000 cps level.

Unit: cps day 1 day 7 days 3 months Viscosity aging rate Example 1 14450 cps 14000 cps 13800 cps 11200 cps 80% Example 2 14250 cps 13600 cps 13100 cps 13067 cps 96% Comparative Example 1 15050 cps 13550 cps 12650 cps 10133 cps 74% Comparative Example 2 21350 cps 20400 cps 20000 cps 16533 cps 81%

Experimental Example  3: Particle size distribution

The average particle sizes of the cosmetic compositions prepared in Examples 1 and 2 and Comparative Examples 1 and 2 were measured by measuring the particle size distribution.

Table 3 below shows the average particle sizes of the cosmetic compositions prepared in Examples 1 and 2 and Comparative Examples 1 and 2, respectively. In Examples 1 and 2, even when the content of the pigment increases, the size of the pigment is similar to that of the existing pigment. In Comparative Examples 1 and 2, the larger the content of the pigment, the larger the particle size. This is presumably because the pigments are not re-agglomerated and the size of the existing pigments stably and well maintained when applying the technique of the embodiment, while the comparative example of the prior art is enlarged in size as pigments cohere in the formulations.

Pigment 0.59 탆 Example 1 0.69 탆 Example 2 0.628 탆 Comparative Example 1 3.03 탆 Comparative Example 2 12.9 탆

Experimental Example  4: Sensory evaluation

The cosmetic compositions prepared in Examples 1 and 2 and Comparative Examples 1 and 2 were subjected to sensory evaluation.

30 women aged 20 to 40 years were used to make the cosmetic compositions prepared in Examples 1 and 2 and Comparative Examples 1 and 2, and the following first to fourth characteristics were evaluated, 5.

- First property: smooth, shiny, moist, residual, and

- Second characteristic: Thickness, stickiness, coverage

- Third characteristic: adhesion

- Fourth characteristic: spreadability

5 is a graph showing the results of sensory evaluation of the cosmetic compositions according to Examples 1 and 2 and Comparative Examples 1 and 2.

Referring to FIG. 5, in Examples 1 and 2, the smoothness, the glossiness, the moistness, the residual feeling, and the prosperity were excellent. Particularly, in Example 2, the content of pigment was higher than that in Example 1, .

Thus, it was confirmed that a cosmetic composition capable of simultaneously realizing moisturizing and covering power could be developed.

Hereinafter, another formulation example of the present invention will be described. However, the formulation of the cosmetic composition comprising pigment particles coated with the coating layer comprising oil phase and water phase according to the present invention is not limited to these examples.

Formulation Example  1: Massage cream

Massage creams comprising pigments coated with a coating layer comprising an oil phase and an aqueous phase of the present invention were prepared in a conventional manner according to the composition of Table 4 below.

ingredient weight% Pigment particles (TiO ₂ having a particle diameter of 0.3 탆 to 0.5 탆) 0.5 Emulsifier (POLYSORBATE 80) One HYDROGENATED LECITHIN 16.5 Icari seed B2 0.5 Wax 10.0 Polysorbate 60 1.5 PEG 60 hardened castor oil 2.0 Sorbitan sesquioleate 0.8 Liquid paraffin 40.0 Squalane 5.0 Caprylic / capric triglyceride 4.0 glycerin 5.0 Butylene glycol 3.0 Propylene glycol 3.0 Triethanolamine 0.2 Preservative, coloring, fragrance Suitable amount Purified water Remainder

Formulation Example  2: Nourishing lotion

A nutrition lotion comprising a pigment coated with a coating layer comprising an oil phase and an aqueous phase of the present invention was prepared in a conventional manner according to the composition of Table 5 below.

ingredient weight% Pigment particles (TiO ₂ having a particle diameter of 0.3 탆 to 0.5 탆) 0.1 Emulsifier (POLYSORBATE 80) One HYDROGENATED LECITHIN 16.9 Alpha-keto glutaric acid 1.0 Niacinamide 1.0 Beta-1,3-glucan 1.0 Wax 4.0 Polysorbate 1.5 Sorbitan sesquioleate 1.5 Liquid paraffin 0.5 Caprylic / capric triglyceride 5.0 glycerin 3.0 Butylene glycol 3.0 Propylene glycol 3.0 Carboxyvinyl polymer 0.1 Triethanolamine 0.2 Preservative, fragrance 0.1 Purified water Remainder

Formulation Example  3: Pack

A pack containing pigments coated with a coating layer comprising oil phase and water phase was prepared in a conventional manner according to the composition of Table 6 below.

ingredient weight% Pigment particles (TiO ₂ having a particle diameter of 0.3 탆 to 0.5 탆) 2 Emulsifier (POLYSORBATE 80) One HYDROGENATED LECITHIN 15 glycerin 4.0 Polyvinyl alcohol 15.0 Hyaluronic acid extract 5.0 Beta Glucan 7.0 Allantoin 0.1 Nonyl phenyl ether 0.4 Polysorbate 60 1.2 ethanol 6.0 Purified water Remainder

Formulation Example  4: Ointment

Ointments were prepared in a conventional manner according to the composition of Table 7 below, including pigments coated with a coating layer comprising an oil phase and an aqueous phase of the present invention.

ingredient weight% Pigment particles (TiO ₂ having a particle diameter of 0.3 탆 to 0.5 탆) 2 Emulsifier (POLYSORBATE 80) One HYDROGENATED LECITHIN 15 Alpha-keto glutaric acid 1.0 Niacinamide 1.0 Beta-1,3-glucan 10.0 Wax 10.0 Polysorbate 5.0 Piggy 60 hardened castor oil 2.0 Sorbitan sesquioleate 0.5 Vaseline 5.0 Liquid paraffin 10.0 Squalane 5.0 Sheer butter 3.0 Caprylic / capric triglyceride 5.0 glycerin 10.0 Propylene glycol 10.2 Triethanolamine 0.2 Preservative, fragrance 0.1 Purified water Remainder

Formulation Example  5: Gel

A gel comprising pigments coated with a coating layer comprising an oil phase and an aqueous phase was prepared in a conventional manner according to the composition shown in Table 8 below.

ingredient weight% Pigment particles (TiO ₂ having a particle diameter of 0.3 탆 to 0.5 탆) One Emulsifier (POLYSORBATE 80) One HYDROGENATED LECITHIN 16 Panthenol 5.0 Seaweed oil 0.01 Alpha-keto glutaric acid 1.0 Niacinamide 1.0 Beta-1,3-glucan 0.1 Ethylenediamine sodium acetate 0.05 glycerin 5.0 Carboxyvinyl polymer 0.3 ethanol 5.0 Piggy 60 hardened castor oil 0.5 Triethanolamine 0.3 Preservative, fragrance 0.1 Purified water Remainder

[Description of Symbols]

1: pigment containing a coating layer including an oil phase and water phase

10: pigment particle

20: single coating layer

30: Duplex coating layer

30a: Oil phase layer

30b:

Claims (11)

A cosmetic composition comprising pigment particles coated with a coating layer comprising oil phase and water phase. The method according to claim 1, Wherein the pigment has a particle size of 0.1 mu m to 1 mu m. The method according to claim 1, The pigment may be selected from the group consisting of titanium dioxide (TiO ₂ ), micro TiO ₂ , zinc oxide (ZnO), micro ZnO, iron oxide, alumina, Al ₂ O ₃ Wherein the inorganic pigment is at least one inorganic pigment selected from the group consisting of barium sulfate, BaSO ₃ , silica, SiO ₂ , talc, kaolin, sericite and mica. The method according to claim 1, Wherein the oil phase comprises at least one member selected from the group consisting of Dimethicone, Methicone, Hydrogen Dimethicone, Caprylic Silanes, and Fluorochemicals. The method according to claim 1, Wherein the water phase comprises at least one member selected from the group consisting of lecithins and silicas. The method according to claim 1, Wherein the coating layer is a single coating layer comprising a mixture of oil phase and water phase. The method according to claim 1, Wherein the coating layer is a double coating layer comprising an oil phase layer and a water phase layer. The method according to claim 1, Wherein the cosmetic composition is formulated in the form of water dispersion, oil dispersion, W / O (water in oil) or O / W (oil in water). The method according to claim 1, Wherein the cosmetic composition is formulated in the form of a liquid, cream or cake type foundation, a make-up base cosmetic or an ultraviolet screening cosmetic. Dispersing a pigment and an emulsifier in an aqueous phase and dispersing the mixture using a thin film swirling type high-speed mixer dispersing apparatus to form a coating layer including oil phase and water phase on the surface of the pigment. 11. The method of claim 10, Wherein the rotational speed of the dispersing device is 5 to 50 m / s.

Images