CN111163748A

CN111163748A - Cosmetic composition comprising pigment and method for preparing same

Info

Publication number: CN111163748A
Application number: CN201880064138.4A
Authority: CN
Inventors: 郑遐缜; 金京南; 金俊一; 河周熺
Original assignee: Amorepacific Corp
Current assignee: Amorepacific Corp
Priority date: 2017-07-31
Filing date: 2018-07-20
Publication date: 2020-05-15
Anticipated expiration: 2038-07-20
Also published as: CN111163748B; KR20190013152A; TW201922200A; KR102337354B1; WO2019027164A1

Abstract

The present invention relates to a cosmetic composition containing a pigment and a method for preparing the same, and to a cosmetic composition containing a pigment and a method for preparing the same, which improve the feeling in use and functionality by uniformizing the particle size distribution of the pigment coated with a coating layer including an oil phase and an aqueous phase.

Description

Cosmetic composition comprising pigment and method for preparing same

Technical Field

The priority of korean patent application No. 10-2017-0097300, which was filed on 31/7/2017, and which is hereby incorporated by reference in its entirety.

The present invention relates to a cosmetic composition containing a pigment and a method for preparing the same, and to a cosmetic composition and a method for preparing the same, which improve the feeling in use and functionality by making the particle size distribution of the pigment uniform.

Background

In general, cosmetic cosmetics are used for the purpose of masking blemishes of the skin, imparting beautiful color tone, and protecting the skin from ultraviolet rays using pigments, and further for the additional purpose of giving a psychologically stable feeling through skin beautification and skin protection functions.

The makeup cosmetic is slightly different depending on the formulation form of emulsion type, dispersion type, and powder type, but titanium dioxide (TiO) is most commonly used as a representative white pigment for imparting color tone and masking skin blemishes₂). However, in the case of titanium dioxide which is not surface-modified, the more excellent the function of masking skin blemishes, the more the re-agglomeration phenomenon occurs, and the phenomenon of blocking after makeup is caused, and particularly, the titanium dioxide has a tetrahedral structure, so that skin is damaged and the extensibility is very poor when applied to the skin, which becomes a factor of reducing the usability.

Methods used to overcome such drawbacks include coating the surface of the pigment with various substrates or compounding the surface of the pigment. In the prior art, surface treatment may be performed using silicon, fluorine, amino acids, chitosan, metal salts, etc. to improve functions such as adhesion and durability. However, in terms of diffusibility and re-agglomeration resistance in the formulation and prevention of removal of makeup at the time of use or after the lapse of time, there is still no practical satisfaction.

For example, Japanese patent No. 5673330 discloses a pigment having a multilayer coating morphology, and discloses that the coating includes a high refractive film (TiO)₂10 to 100nm thick, a colorless film (20 to 100nm thick) and a high refractive film (TiO)₂Thickness of 10 to 100nm), but there is no disclosure of a method of making the particle size distribution of the pigment including the coating film uniform as described above, and thus it may be difficult to ensure a feeling of use and functionality when applied to cosmetics.

Further, U.S. laid-open patent No. 2004-0258640 relates to an interference pigment (interference pigment) that can be used in cosmetics for covering skin blemishes, and although a pigment having a multilayer coating morphology is disclosed, there is no mention of a technique that can secure a feeling of use and functionality when applied to cosmetics by improving the particle size of the pigment.

Therefore, it is an urgent need to develop a technology for preparing a cosmetic composition comprising a coating layer that can protect pigments and can simultaneously improve the feeling in use and functionality when applied to the skin by improving the particle size distribution.

[ Prior art documents ]

[ patent document ]

Patent document 1: japanese granted patent No. 5673330, "silver lustrous pigment";

patent document 2: U.S. publication No. 2004-0258640, "interference pigments and COMPOSITIONs comprising the SAME (INTERFERENCE PIGMENT AND COMPOSITION coloring SAME)".

Disclosure of Invention

Technical problem

In view of the above, the present inventors have conducted various studies to solve the above problems, and as a result, they have confirmed that a cosmetic composition having a uniform particle size distribution can be prepared by dispersing a pigment coated with a dual coating layer including an oil phase layer and an aqueous phase layer using a rotating dispersing device, and the cosmetic composition thus prepared is attached to the skin in a light and thin manner when applied to the skin, thereby providing gloss and a moist feeling to the skin, and having a concealing power and preventing floating makeup and lumping over time.

It is therefore an object of the present invention to provide a cosmetic composition comprising a pigment with improved stability.

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

Technical scheme

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

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

The pigment may be selected from titanium dioxide (TiO)₂) Fine titanium oxide (MicroTiO)₂) Zinc oxide (ZnO), fine zinc oxide (Micro ZnO), iron oxide, aluminum oxide (Al)₂O₃) Barium sulfate (BaSO)₃) Silicon dioxide (SiO)₂) Talc, kaolin, sericite (serilite) and mica.

The oil phase may comprise one or more selected from polydimethylsiloxanes, polymethylsiloxanes, hydrogenated polydimethylsiloxanes, octylsilanes, and fluoro silicones.

Further, the aqueous phase may include one or more selected from the group consisting of lecithins and silicas.

Further, the coating may be a single coating comprising a mixture of an oil phase and an aqueous phase.

Further, the coating may be a dual coating including an oil phase layer and an aqueous phase layer.

In addition, the cosmetic composition can be made into water dispersion type, oil dispersion type, water-in-oil (W/O) type or oil-in-water (O/W) type.

In addition, the cosmetic composition may be formulated into a liquid, cream or solid foundation, a makeup base or a cosmetic for blocking ultraviolet rays.

The present invention also provides a method for preparing a cosmetic composition comprising the step of dispersing a pigment and an emulsifier into an aqueous phase, wherein the dispersion is performed by using a rotating dispersing device to form a coating layer comprising an oil phase and an aqueous phase on the surface of the pigment.

The rotational speed of the dispersing device can be 5m/s to 50 m/s.

Advantageous effects

According to the cosmetic composition of the present invention, the surface of the pigment particles contained in the cosmetic composition is coated with the double coating layer comprising the oil phase layer and the water phase layer, so that a thin and uniform cosmetic film can be formed when applied to the skin, and a moist and moisturized feel can be imparted.

Further, according to the cosmetic composition of the present invention, the viscosity can be maintained at an appropriate level while the particle size distribution of the pigment is made uniform by using a thin film vortex type high speed mixer during the preparation process.

As described above, since the particle size distribution is uniform and has a viscosity of an appropriate level, in the case of applying the cosmetic composition of the present invention to a skin makeup cosmetic such as an air foundation, a compact, a foundation, the concealer force is improved, and problems such as floating makeup or caking after a certain period of time can be improved.

Drawings

Fig. 1a and 1b are schematic views of cosmetic compositions comprising pigments according to the present invention.

Fig. 2 shows a schematic diagram of a process of dispersing pigment particles using a thin film vortex type high speed mixer according to a method of preparing a cosmetic composition of the present invention.

Fig. 3a and 3b are micrographs of the cosmetic compositions prepared in example 1 and comparative example 1, respectively.

Fig. 4 is a graph showing the results of measuring the viscosity retention rate for the cosmetic compositions of example 1 and example 2 and comparative examples 1 and 2.

Fig. 5 is a graph showing the results of sensory evaluation performed on the cosmetic compositions of the liquid foundation formulations according to examples 1 and 2 and comparative examples 1 and 2.

Detailed Description

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

The terms or words used in the present specification and claims should not be restrictively interpreted as ordinary meanings or dictionary meanings, and the inventor should be interpreted as meanings and concepts conforming to the technical idea of the present invention on the basis of the principle that the concept of the terms can be properly defined in order to describe his invention in the best way.

Cosmetic composition comprising a pigment

The present invention relates to a cosmetic composition containing a pigment, and to a cosmetic composition containing pigment particles having a uniform particle size distribution.

In particular, the cosmetic composition according to the present invention is used as a cosmetic composition for skin make-up, whereby a thin cosmetic film can be formed when applied to the skin, not only can a moist and moist feeling be imparted to the skin, but also concealer power is excellent, and floating makeup or caking after a period of time is prevented.

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

The pigment included in the cosmetic composition according to the present invention has a particle size of 0.1 μm to 1 μm, and if the particle size of the cosmetic composition is less than 0.1 μm, there is a problem in that it deviates from the reliability interval of the particle size analyzer, and if it exceeds 1 μm, re-agglomeration occurs.

In the present invention, the pigment may be selected from titanium dioxide (TiO) as a substance for improving concealer power, durability, oil repellency, water repellency and usability, for example, as a substance for improving spreadability₂) Fine titanium oxide (Micro TiO)₂) Zinc oxide (ZnO), fine zinc oxide (Micro ZnO), iron (II) oxide (feo (II)), iron oxide, aluminum oxide (Al)₂O₃) Barium sulfate (BaSO)₃) Silicon dioxide (SiO)₂) Talc, kaolin, sericite (serilite) and mica. In particular, when titanium dioxide is used, it is more advantageous in terms of hiding power and hiding power. The iron oxide may be iron (II) oxide (FeO (II)), iron (iii) oxide (FeO (iii)), or iron (iv) oxide (FeO (iv)).

In the present invention, the coating layer formed on the surface of the pigment may have a single-layer morphology or a double-layer morphology.

Referring to fig. 1a, the pigment 1 including an oil phase and an aqueous phase included in the cosmetic composition according to the present invention may be in a form in which a single coating layer 20 is formed on the surface of the pigment particle 10, and the single coating layer 20 may include a mixture of the oil phase and the aqueous phase.

Further, referring to fig. 1b, the pigment 1 including an oil phase and an aqueous phase included in the cosmetic composition according to the present invention may be in a form in which the surface of the pigment particle 10 is coated with a double coating layer 30 including an oil phase layer 30a and an aqueous phase layer 30 b.

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 aqueous phase to the oil phase is less than 0.1, the functional effect is reduced, and if it exceeds 1, there is a problem in dispersibility.

In the present invention, the oil phase layer as a substance functioning to improve water repellency and dispersibility in the oil phase may include one or more substances selected from the group consisting of polydimethylsiloxanes, polymethylsiloxanes, hydrogenated polydimethylsiloxanes, octylsilanes, and fluorine-based silicones, and particularly when the oil phase layer includes triethoxyoctylsilane (triethoxycaprylsilane), hiding power and dispersibility are facilitated.

In the present invention, the aqueous layer may include one or more substances selected from the group consisting of LECITHINs and silicas as a substance that functions to improve oil repellency and dispersibility in an aqueous phase, and particularly, when the aqueous layer includes HYDROGENATED LECITHIN (HYDROGENATED LECITHIN), dispersibility is facilitated.

In the present invention, the pigment is contained in an amount of 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 range, the concealing power and hiding power may be poor, and if it exceeds the range, there is a problem that stabilization is difficult.

The cosmetic composition of the present invention is effective for various cosmetics, particularly, not only for skin makeup cosmetics such as air-cushion foundation, emulsion foundation, but also for solid cosmetics such as loose powder, fine powder, foundation, compact foundation, blush, eye shadow, mascara, body powder and other solid form cosmetics. At this time, "solid" means that the composition is solid at 25 ℃ and has no fluidity.

The cosmetic composition of the present invention may be formulated into a water dispersion type, an oil dispersion type, a water-in-oil (W/O) type or an oil-in-water (O/W) type.

In addition, the cosmetic composition of the present invention may be formulated into a liquid, cream-type or solid foundation, a makeup base or a cosmetic for blocking ultraviolet rays.

In addition, the cosmetic composition of the present invention may be prepared in any form that is generally prepared in the art, for example, in the form of a solution, suspension, emulsion, paste, gel, cream, emulsion, fine powder, soap, surfactant-containing cleanser, oil, powder foundation, emulsion foundation, wax foundation, spray, etc., but is not limited thereto. More specifically, it can be prepared into dosage forms of softening lotion, nourishing cream, massage cream, essence, eye cream, cleansing foam, cleansing lotion, facial mask, spray or fine powder.

When the formulation of the present invention is paste, cream or gel, animal oil, vegetable oil, wax, paraffin, starch, tragacanth (tragacanth), cellulose derivatives, polyethylene glycol, silicone, bentonite, silica, talc or zinc oxide, etc. can be used as a carrier component.

When the dosage form of the present invention is a fine powder or a spray, lactose, talc, silicon dioxide, aluminum hydroxide, calcium silicate or polyamide powder may be used as a carrier ingredient, and particularly in the case of a spray, a propellant such as chlorofluorocarbon (chlorofluorohydrocarbon), propane/butane or dimethyl ether may be further included.

When the dosage form of the present invention is a solution or emulsion, a solvent, a solubilizer or an opacifying agent may be used as a carrier component, and examples thereof include water, ethanol, isopropanol, ethyl carbonate, ethyl acetate, glycerol, carbomer, benzyl alcohol, benzyl benzoate, propylene glycol, 1, 3-butylene glycol oil, glycerol fatty ester, caprylic/capric triglyceride, hydrogenated polydecene, cetearyl glucoside, sorbitol Stearate (Sorbian Stearate), polyethylene glycol, cetearyl alcohol and the like.

When the formulation of the present invention is a suspension, a liquid diluent such as water, ethanol or propylene glycol, a suspending agent such as ethoxylated isostearyl alcohol, polyoxyethylene sorbitol ester and polyoxyethylene sorbitan ester, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar or tragacanth, or the like can be used as a carrier component.

When the formulation of the present invention is a surfactant-containing cleansing agent, fatty alcohol sulfate, fatty alcohol ether sulfate, sulfosuccinic acid monoester, isethionate, imidazoline derivative, methyltaurate, sarcosinate, fatty acid amide ether sulfate, alkylamide betaine, fatty alcohol, fatty acid glyceride, fatty acid diethanolamide, vegetable oil, lanolin derivative, ethoxylated glycerin fatty acid ester, or the like can be used as a carrier component.

Method for preparing cosmetic composition containing pigment

The present invention also relates to a method for preparing a cosmetic composition comprising the step of dispersing a pigment and an emulsifier into an aqueous phase, wherein the dispersion is performed using a rotating dispersing device to form a coating layer comprising an oil phase and an aqueous phase on the surface of the pigment.

Referring to fig. 2, the secondary aggregation is eliminated by a speed difference generated by a centrifugal force generated by the treatment liquid revolving along the inner wall of the container, and the re-aggregation is prevented, so that the particle size distribution of the pigment can be made uniform.

The rotation speed of the dispersing device may be 5m/s to 50m/s, and if the rotation speed is less than 5m/s, the particle size distribution is slightly improved, and if it exceeds 50m/s, the morphology of the pigment particles may be deformed.

Further, the emulsifier is added so that the pigment can be easily dispersed in the aqueous phase, and as an oil in water (O/W) emulsifier, a surfactant having a hydrophilic-lipophilic balance (HLB) as high as 9 to 15 is used, may include one or more selected from the group consisting of PEG-30 Hydrogenated Castor Oil (Hydrogenated Castor Oil), glyceryl Stearate (glyceryl Stearate) and PEG-100 Stearate (Stearate), Polyethylene Glycol Monoisostearate (Polyethylene Glycol monostearate), Cetearyl Olivate (Cetearyl Olivate)/Sorbitan Olivate (Sorbitan Olivate), Hydrogenated Lecithin (Hydrogenated Lecithin), Arachidyl Alcohol (Arachidyl Alcohol), Behenyl Alcohol (Behenyl Alcohol), Arachidyl Alcohol Glucoside (ArachidylGlucoside), Cetearyl Alcohol (Cetearyl Alcohol)/Cetearyl Glucoside (Cetearyl Glucoside), Polysorbate (Polysorbate)80 and Polysorbate (Polysorbate) 60.

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

The cosmetic composition of the present invention prepared according to the preparation method as described above has a uniform particle size distribution and a high viscosity retention rate even after a long time, and thus is advantageous for the formulation into various dosage forms.

Detailed Description

Hereinafter, the present invention will be described in more detail by way of examples, but it should be construed that the following examples are intended to facilitate the understanding of the present invention, and are not intended to limit the scope of the present invention.

[ example 1]

Cosmetic compositions in the form of liquid foundations having a W/O morphology were prepared according to the components shown in table 1 below.

TiO with the particle size of 0.3 to 0.5 mu m₂Adding POLYSORBATE (POLYSORBATE)80 as emulsifier into HYDROGENATED LECITHIN (HYDROGENATED LECITHIN) as water phase, and dispersing at 30m/s using FIL MICS as thin film vortex high speed mixer to prepare a mixture containing TiO coated with oil phase and water phase₂A cosmetic composition in the form of a liquid foundation containing pigment particles.

At this time, the TiO is allowed to react based on the total weight of the cosmetic composition₂The content of the pigment particles was 7% by weight.

[ TABLE 1]

[ example 2]

The same procedure as in example 1 was repeated, based on the total weight of the cosmetic composition, to subject the TiO to₂The content of the pigment particles was 10% by weight.

Comparative example 1

The same procedure as in example 1 was carried out using a ring mill instead of the thin film vortex type high speed mixer to prepare a mixed solution containing TiO coated with oil and water phases₂A cosmetic composition of pigment particles.

Comparative example 2

The same procedure as in example 2 was carried out using a ring mill instead of the thin film vortex type high speed mixer to prepare a mixture containing TiO coated with oil and water phases₂A cosmetic composition of pigment particles.

Experimental example 1 measurement of particle size distribution

The cosmetic compositions of the liquid foundation formulations prepared in example 1 and comparative example 1, respectively, were observed by a 3D laser microscope.

Referring to fig. 3a, almost no larger sized particles were observed in example 1, whereas referring to fig. 3b, a plurality of larger sized particles were observed in comparative example 1. From this result, it was found that the particle size distribution can be made more uniform in the case of using a thin-film vortex-type high-speed mixer in which pigment particles are dispersed by the centrifugal force of a rotating dispersing device, as compared with the case of using a conventional ring mill.

Experimental example 2 Long-term stability experiment

In order to perform viscosity retention measurements on the cosmetic compositions prepared in example 1 and example 2 and comparative example 1 and comparative example 2, respectively, the viscosity of each cosmetic composition was measured on the day on which the viscosity was initially measured, on days that passed 1 day, 7 days, and 3 months from the initially measured viscosity, to compare the viscosity retention over a period of 3 months.

Referring to fig. 4 and table 2 below, the cosmetic compositions prepared in example 1 and example 2, respectively, had a 3-month viscosity retention of about 96%, while in comparative example 2, the 3-month viscosity retention was about 74% and the viscosity remained at a level of 2 ten thousand cps, and thus were difficult to be applied to various dosage forms.

[ TABLE 2]

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

[ Experimental example 3] particle size distribution

The average particle size was observed for the cosmetic compositions prepared in example 1 and example 2 and comparative example 1 and comparative example 2, respectively, to measure the particle size distribution.

Table 3 below is an average particle size of the cosmetic compositions prepared in example 1 and example 2 and comparative example 1 and comparative example 2, respectively. In example 1 and example 2, a size similar to the particle size of the existing pigment was maintained even though the content of the pigment was increased, but in comparative example 1 and comparative example 2, the more the content of the pigment was increased, the larger the particles were than the existing pigment. The reason is presumed to be that when the technique of the example is applied, the pigment is not re-agglomerated and the size of the conventional pigment is stably maintained, whereas in the comparative example as the conventional technique, the size is increased due to the agglomeration of the pigment in the formulation.

[ TABLE 3]

Pigment (I)	0.59μm
		Example 1	0.69μm
Example 2	0.628μm
		Comparative example 1	3.03μm
Comparative example 2	12.9μm

[ Experimental example 4] sensory evaluation

Sensory evaluation was performed on the cosmetic compositions prepared in example 1 and example 2 and comparative example 1 and comparative example 2, respectively.

The following properties 1 to 4 were evaluated by using the cosmetic compositions prepared in example 1 and example 2 and comparative example 1 and comparative example 2 respectively for 30 women aged 20 to 40 years, and the results thereof are shown in fig. 5.

-a 1 st characteristic: smooth, moist, residual, card powder

-a 2 nd property: heavy feeling, sticky feeling, and concealer effect

-3 rd characteristic: feeling of fitness

-4 th characteristic: spreadability

Fig. 5 is a graph showing the results of sensory evaluation performed on the cosmetic compositions according to example 1 and example 2 and comparative examples 1 and 2.

Referring to fig. 5, it is seen that in examples 1 and 2, the smoothness, gloss, moist feel, residual feel, and seize were all excellent, and in example 2, the pigment content was higher than in example 1, and therefore the concealing power was also better than in example 1.

Therefore, it was confirmed that a cosmetic composition capable of simultaneously realizing a moist feeling and concealer power could be developed.

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

Formulation example 1 massage cream

The massage cream containing the pigment coated with the coating layer including the oil phase and the water phase according to the present invention was prepared according to the components shown in the following table 4 according to the conventional method.

[ TABLE 4]

Composition (I)	By weight%
		Pigment particles (TiO with particle size of 0.3 to 0.5 μm₂)	0.5
Emulsifier (polysorbate 80)	1
		Aqueous phase (hydrogenated lecithin)	16.5
Icariside B2	0.5
		Beeswax (Cera flava)	10.0
Polysorbate 60	1.5
		PEG 60 hydrogenated Castor oil	2.0
Sorbitan sesquioleate	0.8
		Liquid paraffin	40.0
Squalane	5.0
		Caprylic capric acid triglyceride	4.0
Glycerol	5.0
		Butanediol	3.0
Propylene glycol	3.0
		Triethanolamine	0.2
Antiseptic, pigment, and perfume	Proper amount of
		Purified water	Balance of

Formulation example 2 nutrient cosmetic lotion

The nutritional lotion comprising the pigment coated with the coating layer including the oil phase and the water phase according to the present invention was prepared according to the components shown in the following table 5 according to a conventional method.

[ TABLE 5]

Composition (I)	By weight%
		Pigment particles (TiO with particle size of 0.3 to 0.5 μm₂)	0.1
Emulsifier (polysorbate 80)	1
		Aqueous phase (hydrogenated lecithin)	16.9
α ketoglutaric acid	1.0
		Nicotinamide	1.0
β -1, 3-glucan	1.0
		Beeswax (Cera flava)	4.0
Polysorbate ester	1.5
		Sorbitan sesquioleate	1.5
Liquid paraffin	0.5
		Caprylic capric acid triglyceride	5.0
Glycerol	3.0
		Butanediol	3.0
Propylene glycol	3.0
		Carboxyvinyl polymer	0.1
Triethanolamine	0.2
		Antiseptic and spice	0.1
Purified water	Balance of

Formulation example 3 facial mask

A mask pack containing a pigment coated with a coating layer including an oil phase and a water phase was prepared according to the components shown in table 6 below according to a conventional method.

[ TABLE 6 ]

Dosage form example 4 ointment

The ointments containing the pigments coated with a coating layer comprising an oil phase and a water phase according to the present invention were prepared according to the following components shown in table 7 below according to a conventional method.

[ TABLE 7 ]

Composition (I)	By weight%
		Pigment particles (TiO with particle size of 0.3 to 0.5 μm₂)	2
Emulsifier (polysorbate 80)	1
		Aqueous phase (hydrogenated lecithin)	15
α ketoglutaric acid	1.0
		Nicotinamide	1.0
β -1, 3-glucan	10.0
		Beeswax (Cera flava)	10.0
Polysorbate ester	5.0
		PEG 60 hydrogenated Castor oil	2.0
Sorbitan sesquioleate	0.5
		Vaseline	5.0
Liquid paraffin	10.0
		Squalane	5.0
Shea butter	3.0
		Caprylic capric acid triglyceride	5.0
Glycerol	10.0
		Propylene glycol	10.2
Triethanolamine	0.2
		Antiseptic and spice	0.1
Purified water	Balance of

Dosage form example 5 gel

A gel comprising a pigment coated with a coating layer comprising an oil phase and a water phase was prepared according to the components shown in table 8 below according to a conventional method.

[ TABLE 8 ]

Composition (I)	By weight%
		Pigment particles (TiO with particle size of 0.3 to 0.5 μm₂)	1
Emulsifier (polysorbate 80)	1
		Aqueous phase (hydrogenated lecithin)	16
Panthenol	5.0
		Sea pine seed oil	0.01
α ketoglutaric acid	1.0
		Nicotinamide	1.0
β -1, 3-glucan	0.1
		Ethylenediamine sodium acetate	0.05
Glycerol	5.0
		Carboxyvinyl polymer	0.3
Ethanol	5.0
		PEG 60 hydrogenated Castor oil	0.5
Triethanolamine	0.3
		Antiseptic and spice	0.1
Purified water	Balance of

[ description of reference ]

1 to a pigment comprising a coating comprising an oil phase and an aqueous phase;

10-pigment particles;

20-single coating;

30-double coating;

30 a-oil phase layer;

30 b-aqueous phase layer.

Claims

1. A cosmetic composition comprising pigment particles, wherein the pigment particles are coated with a coating layer comprising an oil phase and an aqueous phase.

2. The cosmetic composition according to claim 1, wherein the pigment has a particle size of 0.1 to 1 μm.

3. The cosmetic composition according to claim 1, wherein the pigment is one or more inorganic pigments selected from the group consisting of titanium dioxide, fine titanium oxide, zinc oxide, fine zinc oxide, iron oxide, aluminum oxide, barium sulfate, silica, talc, kaolin, sericite and mica.

4. Cosmetic composition according to claim 1, characterized in that the oily phase comprises one or more substances chosen from polydimethylsiloxanes, polymethylsiloxanes, hydrogenated polydimethylsiloxanes, octylsilanes and fluoro silicones.

5. The cosmetic composition according to claim 1, wherein the aqueous phase comprises one or more substances selected from the group consisting of lecithins and silicas.

6. The cosmetic composition of claim 1, wherein the coating is a single coating comprising a mixture of an oil phase and an aqueous phase.

7. The cosmetic composition of claim 1, wherein the coating is a dual coating comprising an oil phase layer and an aqueous phase layer.

8. The cosmetic composition according to claim 1, wherein the cosmetic composition can be formulated into a water-dispersed, oil-dispersed, water-in-oil or oil-in-water type.

9. The cosmetic composition according to claim 1, wherein the cosmetic composition can be formulated into a liquid, cream-type or solid foundation, a makeup base, or a cosmetic for blocking ultraviolet rays.

10. A method of preparing a cosmetic composition, comprising: dispersing a pigment and an emulsifier into an aqueous phase, wherein the dispersion is performed by using a thin film vortex type high speed mixer dispersing apparatus to form a coating layer including an oil phase and an aqueous phase on the surface of the pigment.

11. The method for preparing a cosmetic composition according to claim 10, wherein the rotating speed of the dispersing device is 5 to 50 m/s.