KR20080088831A - Pearl shiny pigment and a cosmetic composition containing the same - Google Patents

Abstract

A pearl shiny pigment is provided to show shiny effect similar to snow crystals by having refractive index and particle size similar to snow crystals, and express three-dimensional shiny effect of massed snow by using pure glass flake. A pearl shiny pigment contains a mixture of glass flake as a plate with average diameter of 10-500 mum and thickness of 5 mum, and having glass type of A, C or E; and glass flake coated by metal oxide such as titan oxide(TiO2) or ferric oxide(Fe2O3), having refractive index of 1.3-3.0 which further contains a silica layer between the glass flake and metal oxide layer with thickness of 10-300nm, in a mixing ratio of 1:1 to 10:1. A cosmetic composition comprises the pearl shiny pigment for making-up eye or lip.

Description

Pearl shiny pigment and a cosmetic composition containing the same

1 is a schematic diagram illustrating a snowball effect.

2 is an electron micrograph of the powder prepared in Example 1.

3 is It is an electron micrograph of the powder prepared in Comparative Example 1.

4 is an electron micrograph of the powder prepared in Comparative Example 2.

5 is an electron micrograph of the powder prepared in Comparative Example 3.

The present invention relates to a pearlescent pigment and a cosmetic composition comprising the same. More specifically, the pearlescent pigment of the present invention exhibits a snowball effect unlike glass flakes coated with metal oxide alone, by including a mixture of glass flakes and a glass flake coated with a metal oxide. In addition, the present invention relates to a pearlescent pigment and a cosmetic composition comprising the same, in which the physical properties such as refractive index and particle size are similar to eyes in which a glitter effect is aggregated by using a base similar to eye crystals.

The development and manufacture of pearlescent pigments is a technology developed and manufactured by only a few countries such as Germany, the United States, Korea, and China.It is used in cosmetics, household goods, inks, wallpaper, paper printing, automobiles, etc. It is applied to many industrial fields, such as plastics.

Conventional pearlescent pigments were prepared by coating metal oxides, such as titanium oxide, on substrates such as mica, plate alumina, plate silica, and the like. The effect of color, gloss, and glitter varies depending on the type and thickness of the substrate, the particle size, the type and thickness of the metal oxide to be coated, and the particle size. The scattering of light reduces the effect of the glitter. In addition, there is a drawback that can not be used in certain areas of the face because of particle size problems. Lamellar silica and lamellar alumina are chemically synthesized and have high purity and have an even particle size distribution.However, the sparkling effect is weakened by the influence of light interference and the particle size is relatively small. Has characteristics.

Recently, there is a flow to express the aesthetics of snow as a pearlescent pigment, away from the conventional pearlescent pigment that has only been expressed as a flat glitter in powder form. In keeping with this, there is a need for the development of a pearlescent pigment capable of expressing the sparkling effect of the snow crystals and the three-dimensional sparkling effect of the aggregated eyes.

In order to solve the above problems, the present invention has a refractive index and particle size similar to the snow crystals by selecting a base that exhibits the effect of sparkling similar to the snow crystals, by mixing them with pure glass flakes having the property of agglomeration An object of the present invention is to provide a pearlescent pigment and a cosmetic composition comprising the same, which can express a three-dimensional glitter effect of agglomerated eyes.

In order to achieve the above object, the present invention provides a pearlescent pigment, characterized in that it comprises a mixture of a glass flake, and a glass flake coated with a metal oxide.

In the pearlescent pigment of the present invention, the metal oxide is characterized in that the refractive index is 1.3-3.0, characterized in that the titanium oxide (TiO ₂ ) or ferric oxide (Fe ₂ O ₃ ).

In the pearlescent pigment of the present invention, the glass flakes coated with the metal oxide further comprises a silica layer between the glass flake and the metal oxide layer, the glass flakes have an average particle diameter of 10-500 μm, It is characterized in that the plate-shaped body having a thickness of 5 μm or less, and the glass type of the glass flakes is characterized in that the A glass, C glass or E glass. In addition, the metal oxide layer of the glass flakes coated with the metal oxide is characterized in that the thickness of 10-300nm.

In the pearlescent pigment of the present invention, the ratio of the glass flakes and the glass flakes coated with a metal oxide is 1: 1 to 10: 1.

In another aspect, the present invention provides a cosmetic composition comprising the pearlescent pigment. The cosmetic composition of the present invention is characterized in that it is an eye shadow formulation or a cosmetic formulation for lips.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

The present invention provides a mixture of glass flakes and glass flakes coated with a metal oxide in order to provide a pearlescent pigment having a snowball effect.

The snowball effect refers to an effect that provides a sparkling effect when light is reflected from a piled-up snow, and this sparkling is different from conventional sparkling pearls in that it emits a variety of colors depending on the angle and shows a three-dimensional effect. do. The inventors have found that pure glass flakes have a property of agglomeration like snow unlike other bases (glass flakes coated with a metal oxide), so that the metal having the property of shining the pure glass flakes having the agglomeration property By mixing with the glass flakes coated with the oxide, a pearlescent pigment was prepared, which exhibits a sparkling effect, ie, a snowing effect, when light is reflected on the agglomerated eyes. 1 is a schematic diagram expressing a snowball effect. That is, the glass flakes coated with the metal oxide having the shiny property are agglomerated by mixing with the pure glass flakes, and as a result, the glass flakes coated with the metal oxide are positioned at various angles on the surface of the agglomerated mass so that they are three-dimensional and various colors. You can express the sparkles that emit.

The ratio of the glass flakes and the glass flakes coated with the metal oxide is preferably 1: 1 to 10: 1, which is difficult to show a snowball effect when the pure glass flakes are mixed at less than 50%, and the pure glass This is because if the flake contains 10 times more than the glass oxide coated with metal oxide, the sparkling effect is reduced.

The glass flakes coated with the metal oxide further include a silica layer between the glass flakes and the metal oxide layer, and the silica may be used as a protective film for the glass flakes to increase safety for the skin.

The glass flakes are also made of transparent or translucent platelets having an average particle diameter of 10-500 μm, preferably 10-200 μm, and having a thickness of 5 μm, preferably 2 μm or less, which are incident within this particle size range. This is because the light effect can be maximized by minimizing light scattering.

The metal oxide layer of the glass flakes coated with the metal oxide is characterized in that the thickness of 10-300nm. Since the interference effect of light appears differently according to the thickness of the metal oxide layer to be coated, and the color observed is different, the thickness is preferable in order to express the glitter of various colors.

The glass type of glass flakes can use A glass, C glass, or E glass. A glass is soda-lime glass and contains more sodium than potassium and contains calcium dioxide. C glass or so-called chemical glass is resistant to corrosion by acid and moisture. Usually zinc oxide and other oxides are included. E glass or electric glass, as its name suggests, is used in electrical applications and, although very stable at high temperatures, is susceptible to chemical damage. Since C glass and A and E glass have a wide range with respect to chemical composition, A and E glass compositions can be prepared very similarly to C glass.

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

<Example 1>

In order to prepare a pearlescent pigment according to the present invention, first, a glass flake coated with a metal oxide was prepared.

Through crushing and classification process, glass flakes with a particle size distribution of 20-150 μm and a thickness of 1 μm were used as a base, and a silica layer was coated on the glass flakes to increase stability to the skin. Titanium oxide (TiO ₂ ) was coated in various thicknesses. Table 1 is a cross-sectional view of the powder prepared in Example 1, Figure 2 It is an electron microscope photograph of the powder prepared in Example 1.

TiO ₂ (<60 nm) Silica Glass Flakes (<1 μm) Silica TiO ₂

Comparative Example 1

A pearlescent pigment was prepared in the same manner as in Example 1 except that powdery mica was used as a base and there was no silica layer. Table 2 is a cross-sectional view of the powder prepared in Comparative Example 1, Figure 3 Of the powder prepared in Comparative Example 1 Electron micrograph.

TiO ₂ (<60 nm) mica TiO ₂ (<60 nm)

Comparative Example 2

A pearlescent pigment was prepared in the same manner as in Example 1, except that plate alumina was used as a base and there was no silica layer. Table 3 is a cross-sectional view of the powder prepared in Comparative Example 2, Figure 4 is a powder of the prepared in Comparative Example 2 Electron micrograph.

TiO ₂ (<60 nm) Alumina TiO ₂

Comparative Example 3

A pearlescent pigment was prepared in the same manner as in Example 1 except that plate silica was used as a base and there was no silica layer. Table 4 is a cross-sectional view of the powder prepared in Comparative Example 3, Figure 5 is an electron micrograph of the powder prepared in Comparative Example 3.

TiO ₂ (<60 nm) Silica TiO ₂

<Experimental Example 1: Analysis results of the metal oxide coating powder prepared in Example 1, Comparative Examples 1 to 3>

In order to identify the most suitable metal oxide coating powder for preparing a pearlescent pigment having a snowball effect, the metal oxide coating powders prepared in Examples 1 and 3 were compared. Table 5 below compares the analysis results of each powder.

1. Refractive Index of Base 2. Similarity with snow crystals for glitter effect 3. Uniformity of particle size distribution Example 1 ◎ ◎ ◎ Comparative Example 1 X ○ X Comparative Example 2 ◎ X ○ Comparative Example 3 ◎ ○ X

※ 1. ◎ The refractive index of the base is similar to the snow crystal

      ○ The refractive index of the base is somewhat similar to that of snow crystals.

      Refractive index of X base is very different from snow crystal

   2. Glitter effect is similar to snow crystals

      The sparkling effect is somewhat similar to snow crystals

      X glitter effect is very different from snow crystals

   3. ◎ Very uniform particle size distribution of powder (D50> 90%)

      ○ The particle size distribution of the powder is somewhat uniform (90%> D50> 85%)

      Uneven particle size distribution of X powder (85%> D50> 80%)

As can be seen from Table 5, the refractive index of the base was similar to that of snow crystals in plate alumina, plate silica and glass flakes. However, the glass flakes show most of the incident light as a sparkling effect, which is very similar to the snow crystal with a low refractive index of 1.3. In the case of plate silica, not only titanium oxide but also plate silica itself exhibits interference of light. The sparkling effect was weak. In addition, the plate alumina weakened the effect of glitter when the light intensity was weak, and the mica that was easy to flake was finely flaked when using flaky flakes having a relatively large particle, and the effect of the glitter was slightly weakened. As for the uniformity of the particle size distribution, all of the chemically synthesized glass flakes, plate alumina, and plate silica were uniform in particle size distribution, but the mica which was easy to flake was not uniform in particle size distribution.

Therefore, it could be confirmed that the most suitable metal oxide coating powder for preparing a pearlescent pigment having a snowball effect was a glass flake coated with a metal oxide most similar to snow crystals.

<Experimental Example 2: Analysis result of the pearlescent pigment containing a mixture of pure glass flakes and metal oxide coating powder (Example 1, Comparative Examples 1 to 3)>

In order to confirm that the snow clogging effect is shown well when actually mixed with pure glass flakes, a pearlescent pigment comprising a mixed powder obtained by mixing the powders of Examples 1 and Comparative Examples 1 to 3 with pure glass flakes is produced. Analyzed.

Pure glass flakes: Example 1 was mixed in a 5: 1 ratio to prepare Preparation Example 1, pure glass flakes: Comparative Example 1 was mixed in a 5: 1 ratio Manufacture Comparative Example 1, pure glass flakes: Comparative Example 2 Was prepared in a 5: 1 ratio to prepare Comparative Example 2, pure glass flakes: Comparative Example 3 was prepared in a 5: 1 ratio to prepare a Comparative Example 3. Table 6 below compares the analysis results of Preparation Example 1 and Comparative Examples 1 to 3.

Similar to clumped eyes for glitter effects Preparation Example 1 ◎ Comparative Example 1 ○ Comparative Example 2 X Comparative Example 3 ○

※ ◎ The glitter effect is similar to the aggregated eyes

  ○ The sparkling effect is somewhat similar to the aggregated eyes

  X sparkle effect is very different from clumped eyes

As can be seen in Table 6, the powder that the glitter effect of the powder mixed with the pure glass flakes and agglomerated most similar to the snowball effect was a glass flake coated with a metal oxide. Glass flakes were most similar to snow crystals because they exhibited most of the incident light with a sparkling effect, so they were most similar to snow when aggregated with pure glass flakes. In the case of plate silica, plate alumina, and mica, the sparkling effect was weakened similarly to that of Experimental Example 1.

Preparation Example 1 Preparation of Eye Shadow

Preparation Example 1, Comparative Examples 1 to 3 pearlescent pigments were formulated in the makeup cosmetics according to the content of Table 7 (% by weight) to prepare Formulation Examples 1 and Comparative Formulation Examples 1 to 3.

Formulation Example 1 Comparative Formulation Example 1 Comparative Formulation Example 2 Comparative Formulation Example 3 Talc To 100 To 100 To 100 To 100 Mica 10.00 10.00 10.00 10.00 Preparation Example 1 30.00 - - - Comparative Example 1 - 30.00 - - Comparative Example 2 - - 30.00 - Comparative Example 3 - - - 30.00 Pigment 3.0 3.00 3.00 3.00 Aluminum stearate 1.5 1.5 1.5 1.5

The effects of the eye shadows of Formulation Example 1 and Comparative Formulation Examples 1 to 3 were applied to 30 women aged 20-40 years. Evaluation items were made into stability, adhesiveness, usability (spreadability, roughness), and glitter. After rating each item, the students were given a score of 1-5, and the average score was given to 30 people. Each test was carried out five times, the results are summarized in Table 8 below.

Evaluation item Formulation Example 1 Comparative Formulation Example 1 Comparative Formulation Example 2 Comparative Formulation Example 3 stability 5.0 4.5 3.8 3.4 Tightness 4.6 4.5 4.2 4.4 Feeling (spreadability, roughness) 4.8 4.6 4.8 4.1 glitter 4.5 3.8 3.5 4.0

* 5: Very good, 4: Slightly good, 3: Normal, 2: Slightly bad, 1: Very bad

As can be seen in Table 8, in the case of Formulation Example 1 prepared by mixing pure glass flakes and metal oxide coated glass flakes, the sparkling effect was superior to the comparative formulation examples. In addition, the formulation, Example 1 was excellent in stability, adhesion and usability.

Preparation Example 2 Preparation of Lip Gloss

Preparation Example 1, Preparation Comparative Examples 1 to 3 Pearlescent pigments of Formula (Example 2) in Table (9%) by weight of the makeup cosmetics were formulated to prepare Formulation Example 2, Comparative Formulation Examples 4-6. Looking at the manufacturing method in detail as follows.

(1) The raw materials 1-6 were weighed and dissolved in heat at 90 ° C. or higher, followed by stirring with a homogenizer to prepare a mixture.

(2) The raw materials 7-9 were weighed in the above (1), and were disperse | distributed.

(3) The raw materials 10-15 were weighed.

(4) After adjusting the temperature of the mixture of (2) to 75 ~ 85 ℃ and gradually mixed with the homogenizer while slowly adding (3), the lip gloss through a process of degassing, flavoring and cooling Prepared.

Ingredient Name Formulation Example 2 Comparative Formulation Example 4 Comparative Formulation Example 5 Comparative Formulation Example 6 1.wax 4.0 4.0 4.0 4.0 2.polybutene 25.0 25.0 25.0 25.0 3.polyglyceryl triisostearate 25.0 25.0 25.0 25.0 4.glyceryl diisostearate 10.0 10.0 10.0 10.0 5.Diisostearyl maleate to 100 to 100 to 100 to 100 6.Mica 3.0 3.0 3.0 3.0 7.TiO ₂ 0.5 0.5 0.5 0.5 8.Yellow # 5 lake 0.3 0.3 0.3 0.3 9.RED # 6 lake 0.2 0.2 0.2 0.2 Preparation Example 1 5.0 - - - Comparative Example 1 - 5.0 - - Comparative Example 2 - - 5.0 - Comparative Example 3 - - - 5.0 14. Preservative Quantity Quantity Quantity Quantity 15.Single item fragrance Quantity Quantity Quantity Quantity

Evaluation results of Formulation Example 2, Comparative Formulations 4 to 6 are shown in Table 10 below.

Snowball effect Uniformity of particle size distribution Formulation Example 2 4.5 4.6 Comparative Formulation Example 4 3.8 3.2 Comparative Formulation Example 5 3.6 3.5 Comparative Formulation Example 6 4.0 3.9

* 5: Very good, 4: Slightly good, 3: Normal, 2: Slightly bad, 1: Very bad

As can be seen in Table 10, in the case of Formulation Example 2 prepared by mixing pure glass flakes and metal oxide coated glass flakes, the snowball effect was superior to the comparative formulation examples.

As described above, the pearlescent pigment of the present invention includes a glass flake and a mixed powder of a glass flake coated with a metal oxide, so that the snow flake effect unlike the case of using a glass flake coated with a metal oxide alone Indicates. In addition, the physical properties such as refractive index and particle size are similar to that of the shimmering effect by using a mechanism similar to snow crystals. When the pearlescent pigment of the present invention is applied to makeup cosmetics, it is possible to express three-dimensional and various colors of sparkles, and thus the aesthetics of the eyes can be obtained from the product.

Claims (10)

A pearlescent pigment comprising a glass flake and a mixture of a glass flake coated with a metal oxide. The pearlescent pigment of claim 1, wherein the metal oxide has a refractive index of 1.3-3.0. The pearlescent pigment of claim 1, wherein the metal oxide is titanium oxide (TiO ₂ ) or ferric oxide (Fe ₂ O ₃ ). The pearlescent pigment of claim 1, wherein the glass flakes coated with the metal oxide further comprise a silica layer between the glass flake and the metal oxide layer. The pearlescent pigment of claim 1, wherein the glass flakes are platelets having an average particle diameter of 10-500 µm and a thickness of 5 µm or less. The pearlescent pigment of claim 1, wherein the glass type of the glass flake is A glass, C glass or E glass. The pearlescent pigment of claim 1, wherein the metal oxide layer of the glass flakes coated with the metal oxide has a thickness of 10-300 nm. The pearlescent pigment of claim 1, wherein the glass flakes and the glass flakes coated with the metal oxide are mixed in a ratio of 1: 1 to 10: 1. A cosmetic composition comprising the pearlescent pigment of any one of claims 1 to 8. The cosmetic composition according to claim 9, wherein the cosmetic composition is an eye shadow formulation or a cosmetic formulation for lips.

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