KR20120120522A - Composite powder of titanium dioxide and silica and Cosmetic composition for base make up comprising the same - Google Patents

Abstract

PURPOSE: A powder prepared by complexation of titanium dioxide on silica of a plate shape and a cosmetic composition containing the same for base make-up are provided to naturally cover blemishes. CONSTITUTION: A cosmetic composition for base make-up contains 3.0-40.0 wt% of composite powder. The refractive index of the powder is under 1.55. The powder includes silica, polymethyl methacrylate, glass, silicon, calcium carbonate, urethane, or alumina. The powder with 1.8 or more of refractive index is zinc oxide, titanium dioxide, or iron oxide. The average particle size of the power with high refractive index is 1-1,000 nm. [Reference numerals] (AA) Flat-shaped silica

Description

Composite powder of titanium dioxide and silica and Cosmetic composition for base make up comprising the same}

The present invention relates to a composite powder of titanium dioxide and silica and a cosmetic composition for base makeup containing the same, and more particularly, a powder comprising a composite of titanium dioxide in silica and a skin flaw cover and natural scattering (Haze effect) The present invention relates to a cosmetic composition for making up base.

The cosmetics are used to finely apply to the skin including the face and are divided into skin care cosmetics that are applied for a relatively long time over one day through the inner surface and internal care of the skin, and makeup cosmetics that are expected to be effective immediately upon application. Make-up cosmetics cover base defects such as blemishes, freckles, wrinkles, redness, and yellowishness on the face surface to make the color and tone of the entire face even and apply to small areas such as eyebrows and eyelashes lips to decorate them beautifully. It is divided into makeup. Cosmetics, along with clothing and accessories, change the required attributes along with the trends of the times. In recent years, makeup is a thin and transparent expression that does not have makeup, but it is the artificial and longing natural. Cosmetic trends are expected to continue for the time being. However, 'natural' in base makeup does not mean 'transparent' anything wrong, and there is a difficulty in wanting a natural expression while masking defects. The existing trend was to conceal all the flaws and make perfect makeup like a doll's skin. This is usually pursued using titanium dioxide, which is a pigment having a high refractive index, and this research direction is being transformed into a 'transparent cover' in accordance with the current natural trend.

Recently, various attempts have been made to cover such skin defects and to express natural skin. There is a method of providing a blurring effect by using spherical silica or spherical powder such as polymethyl methacrylate (PMMA). The blurring effect by such spherical powder has a disadvantage in that adhesion and molding stability are deteriorated due to the inclusion of a large amount of spherical powder.

Another method is to give a cover having a glossy surface by increasing titanium dioxide, a fine particle having a high refractive index, into a mica or talc having a large amount of specular reflection in a plate shape. This method is widely used by companies developing cosmetics, and it is very effective in terms of feeling and skin expression by improving the rough feeling and low spreadability of titanium dioxide. Titanium may fall off, and the surface of titanium dioxide, which appears as a projection on the surface, may still be less spreadable, and a dull, strong white color may rise due to light diffusion of the titanium dioxide from the projection, resulting in a cloudy appearance in which the face floats. It is in a state.

Accordingly, the present inventors have studied to express a natural cover, and as a result, a composite of titanium dioxide is combined with silica having low refractive index to produce a translucent natural cover, and the reflection of light by titanium dioxide is compounded by compounding titanium dioxide inside the silica instead of the surface thereof. The present invention has been found to be able to increase the length of and increase the soft light and improve the spreadability.

Accordingly, it is an object of the present invention to provide a composite powder giving a natural cover and high spreadability and a cosmetic composition for base makeup containing the same.

In order to achieve the above object, the present invention provides a powder in which titanium dioxide is complexed with silica.

In addition, the present invention provides a base makeup cosmetic composition containing the composite powder, which can impart a natural cover and high spreadability.

The composite powder according to the present invention is a composite of titanium dioxide having a high refractive index into a silica having a low refractive index, and the base makeup cosmetic composition containing the same can naturally cover skin defects and provide a feeling of high spreadability.

FIG. 1 is a schematic diagram of a composite of conventional titanium dioxide into plate powder, and in Comparative Formulation Example 4, silica was used as the plate powder.
FIG. 2 is a schematic diagram of a composite of titanium dioxide of Example 1 in plate-like silica.

The present invention provides a powder comprising a powder having a high refractive index in a plate-like powder and a cosmetic composition for base makeup containing the same.

Hereinafter, the present invention will be described more specifically.

It is preferable that the plate-shaped powder used by this invention is 1.55 or less in refractive index. Plate powders having a refractive index of 1.55 or less include silica, polymethyl methacrylate, glass, silicon, calcium carbonate, urethane, alumina, and the like, but are not limited thereto. The refractive index of human skin varies from person to person, but usually has a value between 1.60 and 1.65. This means that if the refractive index of the applied powder is the same as that of a human, the human eye cannot distinguish between the powder and the human skin, and the powder applied to the skin has a skin-like appearance, allowing natural makeup. In the case of this patent, in order to make the refractive index of the final composite powder in which the high refractive index powder is internally compounded similar to human skin, the low refractive powder is limited to 1.55 or less, so that the composite powder has a refractive index similar to that of the skin. It was.

Silica which is one example of the plate-like powder used in the present invention preferably has an average particle size of 5 to 20 µm. If the average particle size is less than 5㎛ small flakes appear turbid phenomena appear less transparency, if more than 20㎛ the particles are rough, which is not suitable for use in cosmetics.

In the present invention, the powder having a high refractive index composited inside the plate-shaped powder preferably has a refractive index of 1.8 or more. Examples of the powder having a refractive index of 1.8 or more include zinc oxide, titanium dioxide (TiO ₂ ), iron oxide, and the like, but are not limited thereto.

If you look at the refractive index of the powder used in cosmetics, it exists between 1.4 and 2.7. The material complexed with particles therein is a material for covering. The higher the refractive index, the greater the coverage because it reflects a large amount of light. For high cover, the skin must have a higher refractive index than the skin, and the higher the skin refractive index (1.60 ~ 1.65), the greater the effect. Therefore, in this patent, the refractive index of the material compounded therein is limited to 1.8 or more for effective cover.

The titanium dioxide which is an example of the powder complexed inside the plate-like powder used in the present invention preferably has an average particle size of 1 to 1,000 nm. If the average particle size is less than 1nm, the coverage falls, and if it exceeds 1,000nm, it is difficult to complex into the plate-like silica, resulting in a rough feeling of use.

When complexing powder having a high refractive index inside the plate powder, when using plate silica and titanium dioxide as an example, titanium dioxide is contained in an amount of 5.0 to 60.0% by weight relative to the total weight of the whole composite powder. Silica is contained in an amount of 40.0 to 95.0% by weight based on the total weight of the whole composite powder. If the content of titanium dioxide is less than 5% by weight, the covering capacity is lowered. If the content of titanium dioxide is more than 60% by weight, the cover silica does not exist inside the plate-like silica, and the titanium dioxide is exposed to the outside to produce an unnatural cover, and a rough feeling of use This problem appears. When the platelet silica is 40% by weight or less, the titanium dioxide is present on the surface of the platelet silica, similar to the case where the content of titanium nitrite exceeds 60% by weight, resulting in a rough feeling and unnatural skin expression, and at 95% by weight. When contained, the refractive index of the composite powder is low to effectively cover the skin defects.

Silica in which titanium dioxide is compounded therein is obtained through the following method. Ethanol was added to tetramethoxy silane, 0.1 mol / L nitric acid was further added, mixed, and fine titanium dioxide was added thereto, followed by stirring at 40 ° C. for 20 hours. A 1 mm thick stainless plate was immersed in this solution, lifted by 40 cm every minute, and formed into a film, dried for 5 minutes in air, and then dried at 100 ° C. for 2 minutes. The film | membrane apply | coated to a stainless steel plate is peeled off, it heats to 1000 degreeC at the temperature rising temperature of 100 degreeC every minute, heat-processes at 1000 degreeC for 2 hours, and it cools to normal temperature and is obtained by grind | pulverizing.

In addition, the process of complexing plated silica with titanium dioxide on the surface is obtained by drying platelet silica and titanium dioxide at 105 ° C. for 4 hours, placing it in a Henschel mixer, mixing it at high speed, and cooling it to room temperature.

The base makeup cosmetic composition according to the present invention contains a powder obtained by complexing powder having high refractive index inside the plate-shaped powder in an amount of 3 to 40% by weight based on the total weight of the composition. If less than 3% by weight indicates a problem that the cover power is lowered, if more than 40% by weight will have a problem that affects the stability of the formulation is poor stability.

The base makeup composition containing powder complexed with titanium dioxide in plate-like silica can be naturally covered when used in the formulation and can be smoothly spread upon application. The composition may be formulated in the form of a makeup primer, foundation, makeup base, two-way cake, fact, powder, eye shadow and the like.

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

Example 1 Preparation of Powders Composited with Titanium Dioxide Inside Plate-like Silica

NTS30K3TA of Nippon Glass (NSG) of Japan was used for the powder which complexed the titanium dioxide used for the test examples 1-2 to the inside of plate-like silica. NTS30K3TA is a powder in which 3 to 5 nm of titanium dioxide is mixed with 30 wt% of plate silica having an average particle size of 11 μm.

Comparative Example 2 Preparation of Powders Compounded with Titanium Dioxide on a Plate-like Silica Surface

70 g of plate silica and 30 g of titanium dioxide were dried at 105 ° C. for 4 hours, then placed in a Henschel mixer, mixed at high speed, and cooled to room temperature.

Test Example 1 Evaluation of hiding power and haze by color difference meter

In order to examine the effect of the cosmetic composition comprising a powder composited with titanium dioxide according to the present invention, the gloss of the cosmetic composition, containing the plated silica composited with the titanium dioxide prepared in Example 1 in the composition of Table 1 A fact (formulation example 1) was prepared. In addition, Comparative Formulation Examples 1 and 2 each containing silica and titanium dioxide and Comparative Formulation Example 3 simultaneously containing both were prepared for comparison.

The specific method of manufacturing the fact is as follows.

Components 1 to 8 were mixed in the mixer for 2 minutes after basis weight. Components 9 and 10 were weighed separately and then heated to 70-80 ° C. The mixture of components 9 to 10 was sprayed onto the mixture of components 1 to 8, and mixed and pulverized for 1 to 2 minutes at 500 to 1000 rpm using a Henschel mixer. This was again mixed for about 2 minutes at a high speed of 1500 to 2000 rpm. After crushed to 50 hp and filtered. Each formulation example and a comparative formulation example were manufactured by adding fragrance suitably.

Ingredients Formulation Example 1
(weight%) Comparative Formulation Example 1
(weight%) Comparative Formulation Example 2
(weight%) Comparative Formulation Example 3
(weight%) Comparative Formulation Example 4
(weight%) One Talc To 100 To 100 To 100 To 100 To 100 2 Powder composited with titanium dioxide inside plate-like silica 20.0 - - - 3 Plate-like silica - 14.0 - 14.0 4 Titanium dioxide - - 6.0 6.0 5 Powder obtained by compounding titanium dioxide on the plate-like silica surface 20.0 6 Serisite 10.0 10.0 10.0 10.0 10.0 7 Mica 10.0 10.0 10.0 10.0 10.0 8 Iron oxide 2.0 2.0 2.0 2.0 2.0 9 Mineral oil 10.0 10.0 10.0 10.0 10.0 10 antiseptic Suitable amount Suitable amount Suitable amount Suitable amount Suitable amount 11 incense Suitable amount Suitable amount Suitable amount Suitable amount Suitable amount

Evaluation of hiding power and haze effect of Formulation Example 1 and Comparative Formulation Examples 1 to 4 was confirmed as a hiding power (Opacity) and Haze (Haze) values according to reflected light and transmitted light through a color difference meter. The results are shown in Table 2.

As a result of the measurement, Formulation Example 1 containing the composite powder of titanium dioxide and plate silica of the present invention showed high hiding power and high covering power. At the same time, the haze effect is also high, allowing natural makeup expression, providing light coverage without dullness.

However, in the case of Comparative Formulation Example 1, the haze effect is good, but the low hiding power shows a low makeup basic function to hide the defects. In the case of Comparative Formulation Example 2, on the contrary, the hiding power is high, but the haze effect of diffracting light is low, thereby producing an unnatural cosmetic film. In the case of Comparative Formulation Examples 3 and 4, the advantages of Comparative Formulation Examples 1 and 2 were combined to show high hiding power and high haze effect, but were lower than those of Formulation Example 1. In the case of the composite powder of titanium dioxide and plate silica used in Formulation Example 1, light enters into the plate silica and is scattered by titanium dioxide having high refractive index, and the scattered light is scattered again by hitting another titanium dioxide in the plate silica. This is because scattering of light increases and uniformly expands while repeating the process. This is an effect that can not be obtained in Comparative Formulation Example 4 in which silica and titanium dioxide are separately added or compounded on the surface as in Comparative Formulation Example 3.

Ingredients Formulation Example 1 Comparative Formulation Example 1 Comparative Formulation Example 2 Comparative Formulation Example 3 Comparative Formulation Example 4 Opacity 56.4 40.3 51.5 52.2 53.7  Haze effect 93.2 87.6 84.3 89.9 90.4

Test Example 2 Sensory Evaluation by Panel

Sensory evaluation was performed using Formulation Example 1 and Comparative Formulation Examples 1 to 4 in order to find out the covering power, coating uniformity, and roughness of the coating composition of the cosmetic composition including the composite powder of titanium dioxide and plate silica according to the present invention. .

The comparative evaluation of the coverage, coating uniformity, and roughness of the formulation of Formulation Example 1 and Comparative Formulation Examples 1 to 4 were conducted after three days of use in ten consumer women in their 20s to 30s in a consumer panel test. The results are shown in Table 3 below.

division Coverage Application uniformity Feeling when applying Formulation Example 1 ◎ ◎ ◎ Comparative Formulation Example 1 ×× ◎ ◎ Comparative Formulation Example 2 △ × ×× Comparative Formulation Example 3 ○ ○ ○ Comparative Formulation Example 4 ○ ○ ○

※ Evaluation standard

◎: Very good ○: Excellent △: Normal ×: Poor ××: Very bad

As can be seen in Table 3, Formulation Example 1 to which the composite powder of titanium dioxide and the plate-like silica according to the present invention is applied not only has a high covering power compared to Comparative Formulation Examples 1 to 4, but also the uniformity of coating and the feeling of use at the time of application It was confirmed that excellent.

Claims (9)

Powder that has a higher refractive index than the skin inside the plate powder. The composite powder according to claim 1, wherein the plate-like powder has a refractive index of 1.55 or less. The composite powder according to claim 2, wherein the powder having a refractive index of 1.55 or less is at least one selected from the group consisting of silica, polymethyl methacrylate, glass, silicon, calcium carbonate, urethane, and alumina. The composite powder according to claim 1, wherein the powder having a high refractive index has a refractive index of 1.8 or more. The composite powder according to claim 4, wherein the powder having a refractive index of 1.8 or more is at least one of zinc oxide, titanium dioxide, and iron oxide. The composite powder according to claim 1, wherein the powder having a high refractive index has an average particle size of 1 to 1,000 nm. The composite powder according to claim 1, wherein the powder having a high refractive index is 5.0 to 60.0% by weight based on the total weight of the composite powder before coating. A cosmetic composition for base makeup containing the composite powder according to any one of claims 1 to 7. The cosmetic composition for the base makeup of claim 8, wherein the composition contains the composite powder in an amount of 3.0 to 40.0% by weight based on the total weight of the composition.

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