KR20060016974A - Color cosmetic composition of powdery type - Google Patents

Abstract

The present invention can overcome the limitations of using water by dissolving urea in dipropene glycol solvent, not water, and then collecting it in porous silica and applying it to powder type color cosmetics, and improves skin moisturizing power without pH rise or odor, which is a disadvantage of urea. The present invention relates to a powder type color cosmetic composition which can be improved and can produce a brighter and brighter makeup. To this end, the powder type color cosmetic composition according to the present invention is characterized in that it comprises a composite powder coated with silicone oil on porous silica in which urea is collected, and preferably, the urea is a porous silica composite powder. Dissolved in dipropylene glycol is characterized in that it is collected in porous silica.

Urea, dipropylene glycol, porous silica, composite powder, color cosmetic

Description

Powder type tint cosmetic composition {COLOR COSMETIC COMPOSITION OF POWDERY TYPE}

The present invention relates to a powder type color cosmetic composition. More specifically, by dissolving urea in dipropylene glycol solvent rather than water and collecting it in porous silica and applying it to powder type color cosmetics, it is possible to overcome the limitations of water use, without increasing pH or odor, which is a disadvantage of urea The present invention relates to a powder type color tone cosmetic composition capable of improving moisturizing power and producing a brighter and brighter makeup.

Conventional color cosmetics have been developed with the main function of covering the skin defects such as freckles, blemishes and blemishes and expressing the skin color beautifully, but the desires of consumers have been continuously changed and natural in recent years in the thick and covering cosmetic productions of the 80s and 90s. Skincare factors such as makeup, sunscreen and treatments are being changed to develop cosmetics with added cosmetics. In particular, the same cosmetic formulation technology as the basic cosmetics has been researched and developed for the skin care effect, especially the moisturizing effect.

Foundations of color cosmetics are classified into powder type foundation, O / W emulsification type foundation, W / O emulsification type foundation and oily type foundation depending on the formulation, and the moisturizing properties vary greatly depending on the characteristics of the formulation. In particular, powder type foundation is composed of powder and small amount of oil-based components, so it is difficult to mix moisturizing ingredients such as polyol, and the cosmetic film formed on the skin film is a discontinuous film formed by powder. Because of this, the powder type foundation has a lower moisturizing effect than other formulations. However, in terms of simplicity and portability, the powder type foundation is the mainstream of the current color cosmetics and has applied moisturizing effect by applying various techniques.

Previously, the technology of coating powders with excellent moisturizing properties such as collagen, hyaluronic acid and amino acid derivatives has been used (Japanese Patent Laid-Open No. 61-69710, Japanese Patent Laid-Open No. 61-28230, Japanese Patent Laid-Open 62-127092). A technique for blending a water-soluble chitin derivative with high moisturization and a water-soluble chitosan derivative (Japanese Patent Laid-Open No. 7-76508), a technique for coating a lipid two-molecule membrane amino acid complex on the powder (Japanese Patent Laid-Open No. 9-302260), a gel having a crosslinked structure Various powder modification techniques have been tried, such as a technique of coating Latin protein fibers and a moisturizer on the powder (Japanese Patent Application Laid-Open No. 8-92035).

However, even when the moisturizing ingredient is coated on the pigment, the moisturizing ingredient is separated from the pigment by sweat or sebum, and thus the moisturizing function is not exerted, or under low humidity, the moisture is absorbed from the skin. There may be a sticky feeling, there is a problem to be careful when applying to color cosmetics.

On the other hand, the urea used in the present invention is a raw material commonly used in cosmetics and has a function of skin moisturizing, anti-inflammatory and keratin softening, and has been used especially in skin care cosmetic formulations. Urea, however, has the disadvantage of reacting with water to break down into carbon dioxide and ammonia when formulated, and this decomposition product causes rises in pH and odor of the product.

In order to solve this problem, a technique for preventing acidification of the formulation through a buffer solution of disodium hydrogen phosphate and citric acid or a buffer solution of potassium dehydrogen phosphate and disodium hydrogen phosphate (US Patent No.6303656) (Ho), a technique for stabilizing urea in glycine and sodium hydroxide buffer solution at pH 6-9 is being made.

However, problems such as long-term stabilization of urea, stickiness in application of skin, and limitation of application formulation remain. In addition, the application of urea in powder-type color cosmetics with very limited use of water is very rare. In Korea, only a few technologies have been tested, such as the development of water-in-oil type composition (domestic special 2001-0065703).

The present invention has been made to solve the above problems, the object of the present invention is to overcome the limitations of the use of water to decompose into carbon dioxide and ammonia by reacting with water in the formulation of urea, thereby suppressing the pH rise, It is to provide a color cosmetic composition that can enhance the moisturizing effect on the skin without causing odor and can produce a brighter and brighter makeup.

Powder type color cosmetic composition according to the present invention for achieving the above object is characterized in that it comprises a composite powder coated with silicon oil on the porous silica collected urea.

In a preferred embodiment, the urea-collected porous silica composite powder is characterized in that the urea is dissolved in dipropylene glycol and collected in the porous silica.

In a more preferred embodiment, the porous silica is characterized in that the average particle diameter is 6㎛ to 9㎛.

In addition, the powder type color cosmetic composition according to the present invention is characterized in that it contains about 5 to 12% by weight of the porous silica composite powder in which the urea is collected.

Hereinafter, the present invention will be described in detail with reference to embodiments of the present invention. These examples are only for illustrating the present invention in more detail, it will be apparent to those skilled in the art that the scope of the present invention is not limited by these examples in accordance with the gist of the present invention. .

Urea used in the present invention is mainly used in various fields to give a soft texture to the antimicrobial, proteolytic, moisturizing, stratum corneum has a structure of the formula (1).

[Formula 1]

In order to apply these properties of urea to powder type color cosmetics, the present inventors first dissolve urea using a polyol moisturizer such as dipropylene glycol to prevent the restriction of water use and the pH increase of urea due to the characteristics of the powder.

In order to prepare the composite powder of the powder type color cosmetic composition according to the present invention, the weight fraction of dipropylene glycol, urea and porous silica is 20-30% by weight of dipropylene glycol, 5-10% by weight of urea and 60-75% of porous silica. It is preferably in weight percent. In the case of dipropylene glycol, the urea cannot be dissolved when less than 20% by weight, and if it exceeds 30% by weight, it is collected in porous silica and loses the properties of the powder and becomes agglomerated to obtain a light feeling. It is desirable to. In the case of urea, less than 5% by weight does not exert a moisturizing effect, and when it exceeds 10% by weight, it is preferable to set the above range because it is difficult to dissolve in dipropylene glycol.

Dipropylene glycol of the formula (2) used in the powder-type color cosmetic composition according to the present invention is a polyol moisturizer such as glycerin, sorbitol, propylene glycol, etc., and is suitable for a solvent and an auxiliary moisturizer that dissolves urea due to less skin irritation than other moisturizers. . The present inventors studied urea applicable to powder type color cosmetics, and found that after dissolving urea in dipropylene glycol solvent instead of water, it was collected in porous silica powder and applied to powder type color cosmetic to overcome the limitations of water use and urea. The present invention has been completed by finding out that the disadvantages of pH increase or odor can be eliminated.

[Formula 2]

Porous silica of the formula (3) used in the powder type color cosmetic composition according to the present invention is an inorganic fine particle, it is preferable that the average particle diameter is in the range of 6㎛ ~ 9㎛. If the average particle size is less than 6㎛, the particle size is too small to reduce the urea trapping ability, if the average particle diameter is more than 9㎛ because the particles are too large and the texture is rough and the makeup floats when applied to the powder-type cosmetics and adhesion .

[Formula 3]

On the other hand, the present inventors know that the method of coating the powder surface with a moisturizing agent has a disadvantage in that the moisture resistance is improved but the water resistance is poor, and the surface treatment with silicon and modified silicones to improve this. When applied to the skin after such a surface treatment, it was confirmed that the moisturizing ingredient gradually bleeds out and excellent in both water resistance and moisturizing power, and sebum or sweat secreted over time after makeup can be absorbed by porous silica to achieve brighter cosmetic expression. The present invention has been completed.

The surface treatment agent used in the present invention has a structure of formula (4).

[Formula 4]

Where R is H, CH ₃ , Fluoroalkyl, Alkyl, Aminoalkyl, Fatty acid, or Epoxy.

EXAMPLE

The method for preparing porous silica powder in which urea is collected is as follows. Table 1 shows the weight fractions of the components.

TABLE 1

ingredient Content (% by weight) Porous silica 60 Dipropylene glycol 30 Urea 5 Methicone + Hexane 5

First, in order to dissolve urea in dipropylene glycol, the solution is heated to 90 ° C and dissolved, and then the completely dissolved content is cooled to room temperature. Next, porous silica is added to Ace Homogenizer (Nihonseiki Kaisha, Ltd.), and the dissolved content is slowly added using a syringe to collect the content into porous silica. At this time, the stirring speed is 5,000 to 10,000 rpm. Collect all the contents and again stir for 3 minutes at the same stirring speed. Next, mix 5g of silicon (methicone) and 20g of hexane, and slowly add it to Ace Homogenizer rotating at 5,000 ~ 10,000 rpm to surface-treat with silicon. After completion of the coating agent, the mixture was stirred at the same speed for 2 minutes. After all the treatments are finished, put them in a vacuum dryer (Kim Tech. Korea) and dry them at 120 ℃ for 3 hours.

Example 1 and Example 2

As a compact cosmetic containing porous silica powder collected from the urea prepared above, it was set as Example 1 and Example 2 using the weight fraction as shown in Table 2.

TABLE 2

Ingredient Name Example 1 Example 2 Content (% by weight) Content (% by weight) Talc Up to 100 Up to 100 Urea Collected Porous Silica Powder 10 5 Boron nitride 5 5 Nylon 12 7 7 Titanium dioxide 10 10 Mica 25 25 Pigment (iron oxide) Quantity Quantity Dimethicone 7 7 antiseptic Quantity Quantity Spices Quantity Quantity

Comparative Example 1 and Comparative Example 2

Existing compact cosmetics were prepared using the weight fractions shown in Table 3 (does not contain porous silica powder collected in the urea prepared in the examples), and were made as Comparative Example 1 and Comparative Example 2.

TABLE 3

Ingredient Name Comparative Example 1 Comparative Example 2 Content (% by weight) Content (% by weight) Talc Up to 100 Up to 100 Boron nitride 5 5 Silica 10 5 Nylon 12 7 7 Titanium dioxide 10 10 Mica 25 25 Pigment (iron oxide) Quantity Quantity Dimethicone 7 7 antiseptic Quantity Quantity Spices Quantity Quantity

Experimental Example 1

The moisturizing effect was confirmed using the compact cosmetics prepared in Examples 1, 2, Comparative Example 1 and Comparative Example 2. The cosmetics were applied twice a day to the face for 20 healthy women (average age 31 years) in a room with a temperature of 22-24 ° C., a relative humidity of 55% and no air flow. 200, IBS CO LTD, Japan) to measure the moisture content of the skin before and after application to determine the degree of moisturizing effect. The results are shown in Table 4.

[Table 4] Skin moisture content (unit: electrical conductivity μΩ)

Ingredient Name Before application 1 week after application Example 1 67 ± 10 78 ± 10 Example 2 65 ± 10 72 ± 10 Comparative Example 1 71 ± 10 65 ± 10 Comparative Example 2 63 ± 10 61 ± 10

As can be seen from the results of Table 4, in the case of Example 1, the skin moisture content was most improved, and Example 2 also showed a clear improvement, but in the case of Comparative Example 1 and Comparative Example 2 skin moisture content You can see that this is not improved. This may be because dry feeling is caused by the sebum absorption ability peculiar to silica.

Experimental Example 2 Usability Sensory Evaluation

Using the compact cosmetics prepared in Examples 1, 2, Comparative Example 1 and Comparative Example 2 was measured for adhesion, water resistance, sustainability, spreadability, moist. The measurement method was used for one month for 20 healthy women in their mid 20s and mid 30s, evaluated and the average of the results are shown in Table 5.

[Table 5] Sensory Evaluation Results

Tightness Water resistance Persistence Spreadability Moist Average Example 1 4.3 4.1 4.4 4.2 4.5 4.3 Example 2 4.0 3.8 4.1 4.0 4.0 4.0 Comparative Example 1 3.2 3.5 3.7 4.2 3.0 3.5 Comparative Example 2 3.8 3.7 3.5 4.0 3.3 3.7

The evaluation criteria of Table 5 were "5 points: very good, 4 points: good, 3 points: normal, 2 points: bad, 1 point: very bad."

As can be seen from the above results, the compact cosmetics of Examples 1 and 2 containing porous silica powder in which urea was collected showed the best sensory results. And it can be seen that Example 1 and Example 2 shows a very good result in the moisturizing item indicating the degree of moisturizing.

Experimental Example 3 Measurement of Brightness and Brightness of Skin Color

In order to find out the brightness and brightness of skin color with respect to Example 1 showing the best result in the sensory evaluation of Table 5 and Comparative Example 1 showing the worst result, a color difference meter CR-30 (manufactured by Minolta, Japan) was used. The average value was measured in 5 times using Table 6 and shown. The measurement method evaluated the result value before and after makeup on the panel of Experimental example 2. L represents the degree of lightness, a represents the degree of redness, b represents the degree of yellowness, and the higher the value of L, the brighter the skin color.

[Table 6] Measurement result of brightness and brightness of skin color

Item Brightness (saturation) L * a * b * Bare skin 72.56 (L ₁ ) 12.13 (a ₁ ) 16.23 (b ₁ ) - Example 1 74.13 (L ₂₎ 12.02 (a ₂ ) 19.41 (b ₂ ) 3.55 (C ₂ ) Comparative Example 2 73.02 (L ₃ ) 11.54 (a ₃ ) 17.91 (b ₃ ) 1.84 (C3)

As can be seen from the results of Table 6, it can be seen that Example 1 containing porous silica powder in which urea was collected is brighter and brighter. Chroma is calculated by the following formula. A large C value means higher saturation.

[Formulation example]

On the basis of the results of the experimental examples, a powder type cosmetic containing urea-collected porous silica powder according to the present invention is presented. However, the composition of the present invention is not intended to be limited to the following formulations, but is for illustration only.

[Table 7] Face Powder

Ingredient Name weight% Talc Up to 100 kaoline 3.0 Preparation Example 1 12.0 Pigment (iron oxide) Quantity antiseptic Quantity Squalane 1.0 Hexyllaurate 0.5 Diisostearyl maleate 1.0

Table 8 Two-way cake

Ingredient Name weight% Talc Up to 100 Mica 20.0 Titanium dioxide 15.0 Pigment (iron oxide) Quantity antiseptic Quantity Preparation Example 1 10.0 Squalane 2.0 Hexyllaurate 1.5 Diisostearyl maleate 0.5 Phenyltrimethicone 1.0 incense Quantity

Table 9 Eyeshadows

Ingredient Name weight% Talc Up to 100 Zinc stearate 3.0 Boron nitride 3.0 Preparation Example 1 8.0 Mica 25.0 Pigment (iron oxide) 3.0 Mineral oil 5.0 Dimethicone 2.0

In the present specification, only a few examples of various manufacturing and analysis experiments performed by the present inventors are described, but the technical idea of the present invention is not limited thereto, and may be variously modified and implemented by those skilled in the art. .

As described above, according to the powder-type color cosmetic composition according to the present invention, by dissolving urea in dipropylene glycol solvent rather than water and collecting it in porous silica to overcome the limitations of the use of water by applying to powder-type color cosmetics It can do and improve the skin's moisturizing ability without pH rise or odor which is a disadvantage of urea, and can produce more bright and bright makeup.

Claims (4)

As a color type cosmetic composition of the powder type, Powder type color cosmetic composition, characterized in that it comprises a composite powder coated with silicone oil on the porous silica collected urea. The method of claim 1 The porous silica composite powder in which the urea is collected is characterized in that the urea is dissolved in dipropylene glycol and collected in porous silica. The method of claim 1 The porous silica is characterized in that the average particle diameter of 6㎛ 9㎛, powder type color cosmetic composition. The method according to any one of claims 1 to 3, The color cosmetic composition is a powder type color cosmetic composition, characterized in that containing about 5 to 12% by weight of the porous silica composite powder collected in the urea.