KR20070058722A - Makeup cosmetic composition which contains non-coated or coated amorphous titanium dioxide - Google Patents

Abstract

A makeup cosmetic composition is provided to be able to cover skin defects and show natural skin expression by controlling the particle size of amorphous titanium dioxide to be within the range of 0.1-1.0 micrometer. The makeup cosmetic composition comprises 0.01-25.0 wt.% of amorphous titanium dioxide having a particle size of 0.1-1.0 micrometer, wherein the amorphous titanium dioxide is coated by an organometallic salt such as C8-25 magnesium salt or aluminium salt, or a silicone-based derivative material.

Description

Makeup cosmetic composition which contains non-coated or coated Amorphous Titanium Dioxide}

1-RAO and customer preference evaluation of Test Example 1

2-HP value and customer preference evaluation of Test Example 2

The present invention relates to a powder and an emulsified makeup cosmetic composition which has a high coverage for skin defects and greatly improves natural skin expression without faltering, and more particularly, it is most widely used for cosmetic coverage and color effects in cosmetics. Amorphous crystal structure of titanium dioxide (TiO ₂ ), which is a white pigment, is used to control the particle size, and the amorphous titanium dioxide is coated with an uncoated or an organometallic salt or a silicon-based material. The present invention relates to a makeup cosmetic composition having natural skin expression while overcoming the unnatural and fragile disadvantages that have been a problem when the coverage is high by applying.

In the case of make-up cosmetics, titanium dioxide (TiO ₂ ), which is a white inorganic pigment, is most widely used to increase the covering power, and the titanium dioxide is rutile, anatase, brookite, and amorphous ( Titanium dioxide, which has a variety of amorphous structures and usually has a rutile or anatase crystal structure, has a high refractive index (n = 2.5 to 2.75) and is highly used in the makeup cosmetics and paint industry because of its high hiding power. have.

However, since titanium dioxide having a crystal structure of rutile or anatase type has a high refractive index and whiteness is too high, the makeup cosmetics such as liquid foundation or powder foundation containing them may cause the makeup to appear loose in the skin expression. It has the disadvantage of appearing unnatural, especially when the content is increased to increase the coverage, the phenomenon becomes more prominent.

As mentioned above, the problem that the makeup is visible is that the refractive index of the skin is n = 1.5 to 1.6, while the refractive index of titanium dioxide having a rutile or anatase type crystal structure is n = 2.5 to 2.75, which is a skin and rutile or anatase type. Titanium Dioxide with Crystal Structure It is caused by a large difference in refractive index between the two phenomena tends to increase in proportion to the square of (refractive index 1-refractive index 2 / refractive index 1 + refractive index 2). In the case of makeup cosmetic compositions such as emulsion type and powder foundation, covering ability to conceal skin defects is one of the most important functions. Therefore, it is inevitable to use titanium dioxide above a certain content. It is considered one of the most important tasks in development.

Conventional application of amorphous titanium dioxide to cosmetics has been published in Japan (Japanese Patent: Patent No. 1994-183930,1994-199636), but in order to maximize the UV blocking effect, the particle size is 10 ~ 25nm, largely 70nm or less It was used by adjusting. However, as described above, when the particle size of the amorphous titanium dioxide is 0.1㎛ or less, the sunscreen effect can be increased, but the coverage of skin defects is too low, and it is not suitable for application to a general powder foundation or an emulsified foundation.

In order to improve such unnatural skin expression, titanium dioxide is compounded with powders such as talc, mica and silica to change refractive index, or by adjusting the shape and size of the powder to increase light scattering effect on light. Research has been conducted to cover the skin defects while minimizing the amount of used, but the results are still insufficient to achieve the two objectives of covering skin defects and expressing natural skin.

Therefore, the inventors of the present invention have been made in view of the fact that the refractive index may be different depending on the crystal structure of titanium dioxide, and to solve the above problems by developing and introducing a titanium dioxide crystal structure having the most suitable refractive index, amorphous (Amorphous) titanium Dioxide (TiO ₂ ) has a refractive index of n = 2.2 ~ 2.35, allowing natural skin expression compared to rutile or anatase, and by adjusting the particle size in the range of 0.1 ~ 1.0㎛, it gives a natural skin expression effect while ensuring coverage. It has been found that the makeup cosmetic composition according to the present invention has been completed.

An object of the present invention is to provide a makeup cosmetic composition that exhibits a natural skin expression effect while ensuring cover power by containing amorphous titanium dioxide having a particle size of 0.1 ~ 1.0㎛.

Still another object of the present invention is to provide a makeup cosmetic composition which contains amorphous titanium dioxide coated with an uncoated or organometallic salt or a silicon-based material, thereby covering power and expressing natural skin.

In order to achieve the above object, the present invention provides a makeup cosmetic composition comprising amorphous titanium dioxide having a particle size of 0.1 ~ 1.0㎛. The amorphous titanium dioxide is used in an uncoated state or coated with an organometallic salt or a silicon-based material, and the composition of the makeup cosmetic of the present invention is an uncoated or coated amorphous titanium dioxide having a particle size of 0.1 to 1.0 μm. It is contained in 0.01 to 25.0% by weight based on the total cosmetic composition.

Hereinafter, the present invention will be described in more detail.

Titanium dioxide (TiO ₂ ) is a material that is very stable physically and chemically and is most commonly used as a white pigment due to its high hiding power, and is most widely used to increase covering power in makeup cosmetics. The titanium dioxide has a rutile (Rutile), anatase (Anatase), brookite (Brookite) and amorphous (Amorphous) crystal structure. In the case of rutile or anatase, the refractive index is n = 2.5 ~ 2.75 and the whiteness is too high, resulting in unnatural skin expression, while amorphous titanium dioxide has a refractive index of n = 2.2 ~ 2.35, which is more natural than the rutile or anatase. This is possible.

Therefore, in the present invention, amorphous titanium dioxide is used, and the titanium dioxide has a particle size range of 0.1 to 1.0 μm, and the particle size of the amorphous titanium dioxide is less than 0.1 μm to the skin defects to be obtained in the present invention. There is a problem that the cover power is too low to be suitable for application to a general powder foundation or emulsified foundation, there is a problem that the cover power is too low due to the weakening of the scattering power to light even in excess of 1.0㎛. In addition, it is preferable to use amorphous titanium dioxide in an amount of 0.01 to 25.0% by weight based on the total cosmetic composition in order to enable natural skin expression without sloppyness, and when using less than 0.01% by weight, yellow and black are used together. And there is a problem that the color by the red pigment is expressed too strongly, when used in excess of 25.0% by weight may be unnatural due to the excessively high coverage and the problem of thickening the makeup due to deterioration of usability.

In the makeup cosmetics containing amorphous titanium dioxide having a particle size of 0.1 to 1.0 μm according to the present invention, in order to use the amorphous titanium dioxide as it is uncoated or improve the feeling of use, the magnesium salt or aluminum salt having 8 to 25 carbon atoms Used by coating with organometallic salt or silicon-based material.

The silicon-derived materials include triethoxysilylethyl polydimethylsiloxyethyl dimethicone, triethoxysilylethyl polydimethylsiloxyethyl hexyl dimethicone, triethoxycapryl silane and acrylate-crydecyl acrylate-trier One or a mixture of two or more selected from oxysilylpropyl methacrylate-dimethicone methacrylate copolymer can be used.

Compressed powder type powder foundation, water-in-oil or oil-in-water emulsified foundation, makeup base, and loose type powder containing uncoated or organometallic salts or silicon-based materials having a particle size of 0.1 to 1.0 μm. It can be formulated according to a conventional method.

The composition of the powder foundation contains amorphous titanium dioxide, uncoated or coated with respect to the entire cosmetic composition. 0.01 to 25.0% by weight, 3.0 to 30.0% by weight of sieving pigments such as talc, mica, silica, sericite, nylon, polymethylmethacrylate, 1.0 to 7.0% by weight of red, yellow and black iron oxide and dimethicone, Selection from silicone oils such as penyl trimethicone, ester oils such as caprylic / capryl triglycerides, hexyllaurate, dicaprylylcarbonate, diisostearyl maleate, alkylethylhexanoate and triglyceride oils It contains 1.0 to 10.0% by weight of the oil binder.

The composition of the foundation of the emulsion formulation is coated with amorphous titanium dioxide, uncoated or coated with respect to the entire cosmetic composition. 0.01 to 25.0% by weight, red, yellow and black iron oxides 1.0 to 7.0% by weight, 15 to 30.0% by weight sieving pigments such as talc, mica, silica, sericite, nylon, polymethylmethacrylate, water-in-oil and oil-in-water emulsifiers 0.1 to 3.0% by weight and silicone oils such as cyclomethicone, dimethicone and penyltrimethicone, or caprylic / capryl triglycerides, hexyllaurate, dicaprylylcarbonate, diisostearyl maleate, alkyl It contains 5.0-40.0 weight% of ester-type and triglyceride-type oils, such as ethyl hexanoate.

Hereinafter, the present invention will be described in more detail with reference to the following examples and comparative examples. However, these Examples and Comparative Examples are only for better understanding of the present invention, and the scope of the present invention in any sense is not limited only to these examples.

[Formulation Example 1-3 and Comparative Formulation Example 1-3] Powder Foundation

Powder foundation was prepared according to the conventional powder foundation manufacturing method using the powder foundation composition in a composition ratio as shown in Table 1 below.

 TABLE 1

<Production method>

1) Mix components 1 to 11 uniformly using a Henschel mixer.

2) After mixing the components 12-14, it heats to 60 degreeC.

3) Spray the mixture of 2) to the mixture of 1) using a hydraulic spray and mix.

4) The mixture of 3) is press-molded using a hydraulic molding machine.

[Test Example 1] RAO and customer preference evaluation

In order to measure the natural skin expression power of the powder foundation prepared in Formulation Examples 1-3 and Comparative Formulation Examples 1-3, the reflectance value for the obtuse incident light is divided by the reflectance value for the acute incident light as shown in Equation 1 below. After the acute reflection value was obtained, skin expression power was evaluated by RAO value. Acute angle reflectance and obtuse angle reflectance of the powder foundation prepared in Formulation Examples 1-3 and Comparative Formulation Examples 1-3 were measured by Goniophotometer GP-200, and the RAO values are shown in Table 2 below.

The reflectance of the acute incident light is a value providing color information, and the reflectance of an obtuse incident light is a value providing information on transparency. The RAO value is measured even though the color is similar to that of a normal foundation. It was measured based on the results of the research that the reflectance of the obtuse incident light is high (Fragrance J. 2001, “Development and task of foundation for beautiful and natural finish”). The results of the investigation and analysis of the subjects are shown in FIG. 1 .

 [Equation 1]

Assessment Methods :

1) Powder Foundation of Formulation Examples and Non-Formulation Examples is evenly applied on Black Artificial Leather.

2) Measure the reflectance value for each incident light by using a Goniometer. (80 ° obtuse incident light, 5 ° acute angle incident light)

3) Get the RAO value.

[Table 2] RAO value measurement result

As shown in FIG. 1, when the RAO value is 4.5 or more, the customers' preference for natural skin expression was analyzed to appear high. In addition, as can be seen from Table 2, Formulation Example 1-3 and Comparative Formulation Example 1 containing amorphous titanium dioxide have a RAO value of 5.0 or more due to the high reflectance of the obtuse incident light, amorphous, ruta Among the three crystal structures of Japanese and anatase, it was found that the amorphous form had the most natural skin expression ability. In addition, even if the content of amorphous titanium dioxide having a particle size of 0.1-1.0 μm is increased from Formulation Example 1 and Formulation Example 2, a natural skin expression effect is maintained even if the content of amorphous titanium dioxide is increased. It can be seen that Comparative Formulation Example 1 containing amorphous titanium dioxide having a particle size of less than 0.1 μm and Formulation Example 3 containing coated amorphous titanium dioxide showed a high RAO value of 5.5 or more. By coating the dioxide or reducing the particle size, it was found that the effect of expressing the skin more naturally can be obtained.

Therefore, it can be seen that by controlling or coating the particle size of the amorphous titanium dioxide in the present invention, a more natural skin expression effect can be obtained.

[Test Example 2] Covering power and customer preference evaluation

In order to measure the covering power of the powder foundations prepared in Formulation Examples 1-3 and Comparative Formulation Examples 1-3, the “Korean Industrial Standard KSM-498” is used as a method of measuring the hiding power of the paint (hereinafter referred to as HP). Using the test method, HP values were obtained through the following evaluation method and Equation 2.

[Equation 2]

Table 3 HP value measurement results

Assessment Methods :

1) Apply the powder foundation of formulation and non-formulation bridge uniformly on white and black artificial leather.

2) Measure the 45˚ reflectance value for each 45˚ incident light by using Goniophotometer P-200.

3) Obtain the HP value.

In addition, the five-point scale method is applied to 30 customers who use makeup based on various HP values. The results of the investigation and analysis are shown in FIG. 2.

As shown in Table 3, in the case of Formulation Example 1, Formulation Example 3, and Comparative Formulation Example 1 containing amorphous titanium dioxide, a comparative formulation example containing titanium dioxide having a crystal structure of rutile or anatase regardless of coating Although weak coverage was obtained by having a higher HP value than 2 and Comparative Formulation Example 3, formulation 2 showed excellent coverage by having a low HP value.

However, it can be seen from the customer preference according to the HP value shown in FIG. 2 that the most preferred HP value region is 67 to 69, and in the case of the formulation example containing amorphous titanium dioxide according to the present invention, the coverage tends to be weak. Even though it was found to be included in the area. In addition, by increasing the content of the amorphous titanium dioxide as in Formulation Example 2 it could exhibit the effect of increasing the coverage.

However, in Comparative Formulation Example 1 containing amorphous titanium dioxide having a particle size of less than 0.1 μm, the coverage was greatly reduced, so that the skin defects could not be covered, and thus the customer preference for coverage was low.

In order to satisfy both the natural skin expression and the coverage of skin defects, which are not easily seen from Table 2 and Table 3 and FIGS. 1 and 2, amorphous titanium dioxide is suitable, and in particular, the particle size is in the range of 0.1 to 1.0 μm. The effect was found to be excellent.

[Test Example 3]

In order to check the results of the improvement of the coverage and skin expression of the powder foundation prepared in Formulation Examples 1-3 and Comparative Formulation Examples 1-3, a comparative evaluation was performed on 40 women in their 20s to 40s by the sensory evaluation method. The results are shown in Table 4.

Table 4 Sensory Evaluation Results

As can be seen in Table 4, in the case of Formulation Example 1-3 of the present invention using the amorphous titanium dioxide having a particle size of 0.1 ~ 1.0㎛ significantly reduced the appearance, the naturalness and transparency is greatly improved The evaluation results were obtained, and in the case of Formulation Example 2, the coverage was increased by increasing the content of amorphous titanium dioxide.

In particular, in the case of Formulation Example 3 using the coated amorphous titanium dioxide, it was found that the usability aspects such as durability, adhesion, coating uniformity, and the like were greatly increased.

In the present invention, by introducing a new amorphous amorphous titanium dioxide (TiO ₂ ) having a particle size of 0.1 ~ 1.0㎛ in the makeup cosmetic composition to control the content of the amorphous titanium dioxide, it is possible to control the coverage, increase the coverage Even though it was found that the natural skin expression effect is greatly improved without any excitement, when the amorphous titanium dioxide is coated with an organometallic salt or a silicon-based material, the overall usability such as durability, adhesion, and coating uniformity can be greatly improved.

Claims (6)

A makeup cosmetic composition comprising amorphous titanium dioxide (TiO ₂ ) having a particle size of 0.1 to 1.0 μm. The method of claim 1, The amorphous titanium dioxide is a makeup cosmetic composition, characterized in that the coating with an organic metal salt or silicon-based material. The method of claim 2, The organometallic salt is a makeup cosmetic composition, characterized in that the C8 to 25 magnesium salt or aluminum salt. The method of claim 2, The silicone-derived materials include triethoxysilylethyl polydimethylsiloxyethyl dimethicone, triethoxysilylethyl polydimethylsiloxyethyl hexyl dimethicone, triethoxycapryl silane and acrylate-crydecyl acrylate-triethoxy A makeup cosmetic composition, characterized in that one, or a mixture of two or more selected from silylpropyl methacrylate-dimethicone methacrylate copolymers. The method of claim 1, Makeup cosmetic composition comprising the amorphous titanium dioxide in an amount of 0.01 to 25.0% by weight based on the total composition. A makeup cosmetic composition according to any one of claims 1 to 5, wherein the makeup cosmetic composition is formulated with a powdered powder foundation, water-in-oil or oil-in-water emulsion foundation, makeup base and loose type powder.

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