KR100343324B1 - Surface-treated powders with amino acid and silicone fatty ester, method for preparation thereof and colour cosmetic composition using them - Google Patents

Abstract

The present invention relates to a powder surface-treated with a metal salt of N­acylamino acid and a silicone fatty ester, a preparation method thereof, and a color cosmetic composition containing the surface-treated powder.

In the present invention, the silicone fatty ester is a type of fatty modified silicone compound having a silanol fatty ester group formed by ester-bonding a fatty carboxylic acid and a hydroxyl (OH) group of a silicone polymer, and has excellent lubricity and water resistance. .

The present invention is to reprocess the conventional amino acid surface treatment powder with such silicone fat ester, thereby greatly improving the shortcomings of water resistance, lack of malleability, rough feeling, etc. of the conventional amino acid treatment powder.

Therefore, by using the amino acid / silicone fatty ester composite surface treatment powder of the present invention as a component of a cosmetic, it is possible to provide excellent long-lasting color cosmetics having excellent malleability and skin adhesion, and especially having skin expression and moist feeling on the skin. have.

Description

Surface-treated powders with amino acid and silicone fatty ester, method for preparation etc. and color cosmetic composition using them}

The present invention relates to a composite surface-treated powder used in cosmetics, a method for producing the same, and a color cosmetic composition using the same. More specifically, powders surface-treated with Al, Mg, Ca, Zn, Zr, or Ti salts of Nacylamino acids (hereinafter referred to as "Nacylamino acid metal salts") and silicone fatty esters, It relates to a manufacturing method and a color cosmetic composition containing the surface-treated powder.

Generally, water soluble N­acylamino acid salts such as Na­, K­, Li­ and triethanolamine salts of N­acylamino acid are produced and marketed industrially as anionic surfactants. In addition, these water-soluble salts are widely used as basic ingredients in detergents and emulsifiers, especially shampoos, soaps and creams.

On the other hand, a method of using a water-insoluble N 실 acylamino acid metal salt as a surface treatment agent for cosmetic pigments and extender pigments was developed by Miyoshi, Japan, and is widely used in makeup cosmetics and the like (see US Patent 4,606,914). The Nacylamino acid metal salt surface treatment powder has a weak acidity similar to the pH of the skin, has a function of protecting the skin, prevents drying of the skin, and has excellent dispersibility due to its strong affinity with other cosmetic pigments and oils. It is known that there are various advantages such as dots.

On the other hand, the Nacylamino acid metal salt surface-treated powder has a lower water resistance than the powder treated with a silicon-based compound and the metal salts are adsorbed on the surface of the powder in the form of fine particles, so that the metal salts are separated by strong agitation due to the poor durability of surface modification. It is easy and lacks in ductility, such as feeling of roughness when applying the skin due to the metal component of the surface, and lack of skin expression power when making a color cosmetic by using it with other pigments and extender pigments surface-treated with a silicone-based compound. There is this.

Accordingly, the present inventors have conducted studies on composite surface-treated powders which use other types of surface treatment agents in addition to conventional Nacylamino acid metal salts in order to solve the above problems, and as a result, Nacylamino acid metal salts and silicon The surface treated powder using fatty ester together shows strong water resistance while maintaining the advantages of conventional amino acid treatment, and it is applied smoothly to the skin, so it is not only excellent in malleability but also improves skin expression power of color cosmetics containing it. Discovered and completed the present invention.

One object of the present invention is to provide new composite surface treatment powders useful as color cosmetics.

More specifically, it is an object of the present invention to provide a surface-treated powder which greatly improves the disadvantages of lack of water resistance, lack of malleability, lack of skin expression, etc. while maintaining the advantages of the conventional N­acylamino acid metal salt surface treatment powder.

It is still another object of the present invention to provide a color cosmetic comprising a surface-treated powder having excellent skin adhesion and a smooth feel.

Another object of the present invention is to provide a method for producing powder for coloring cosmetics having excellent skin expressing power.

Still another object of the present invention is to provide a method for producing a moist and strong water resistance cosmetic powder and a long-lasting color cosmetic containing the same.

The present invention is a composite surface-treated powder in which a metal salt of N­acylamino acid and a silicone fatty ester are coated on powder.

In addition, the present invention adds 0.5 to 10% of the water-soluble salt of N-acylamino acid to the powder suspended in water, and then adds the water-soluble metal salt dropwise at 0.6 to 2.0 times the number of moles of the N-acylamino ray water-soluble salt. It is a method for producing a composite surface-treated powder consisting of coating a metal salt of N-acylamino acid on the surface and re-coating the silicone fat ester on the powder at 0.5 to 10% by weight of the powder.

In addition, the present invention is a color cosmetic composition using the composite surface-treated powder.

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

The metal salt of N­acylamino acid according to the present invention is selected from the following formulas (I), (II) and (III);

Wherein RCO represents a residue derived from capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, or oleic acid; M represents an aluminum atom, magnesium atom, calcium atom, zinc atom, zirconium atom, or Titanium atom; k is an integer of 1 to 3; I is an integer of 1 to 2; m represents an integer of 1 to 4).

Examples of Nacylamino acids which are precursors of the Nacylamino acid metal salts represented by the above formulas include NacylNmethylglycine, NacylNmethylβalanine, and NacylLglutamic acid. Among them, Nacylglutamic acid is used. desirable.

In the present invention, the silicone fatty acid ester is a silanol fatty acid ester (Silanol Fatty Ester) group formed by combining a hydroxyl (OH) group ester of a fatty carboxylic acid, ester or anhydride having 11 to 20 carbon atoms with a silicone polymer. Eggplant refers to a kind of lipid-modified silicone compound, which is known as a wax that adheres firmly to an object due to the silanol fatty ester group and imparts high lubricity and water resistance. For example, the physical properties, uses, molecular structures, manufacturing methods, etc. of the silicone fatty esters are described in detail in US Pat. Nos. 5,051489, 5,136,063, 5,180,843, and 5,226,923.

As the silicone fatty ester compound as described above, there are various types of compounds depending on the type of fat and the structure of the silicone polymer, among which dimethiconol stearate and dimethiconol are currently registered and used as components of cosmetics. Preference is given to using dimethiconol Hydroxystearate.

As the powder used in the present invention, inorganic powders such as talc, silica, kaolin, mica, sericite and other mica, magnesium carbonate, calcium carbonate, aluminum silicate, magnesium silicate, barium sulfate, barium carbonate, boron nitride, diatomaceous earth, etc. Extender pigments, titanium oxide, zinc oxide, zirconium oxide, bengal, yellow iron oxide, black iron oxide, ultramarine blue, inorganic pigments such as chromium oxide, chromium hydroxide, pearlescent pigments such as mica titanium, bismuth oxychloride, etc. Can be. Moreover, as organic powder, organic pigments, such as plastic powders, such as nylon, PMMA, and polyethylene, and a tar pigment, can also be used, for example.

A method for producing an amino acid / silicone fatty ester composite surface treatment powder according to the present invention is to specifically coat the surface of the powder with silicone fatty ester after surface treatment of the powder with amino acids.

First, in one step, the powder is mixed with water and stirred to form a slurry having a slurry state of about 5 to 30% by weight. N-acylamino acid water-soluble salt is added to this suspension in an amount of 0.5 to 10%, preferably 0.5 to 3% based on the weight of the powder, and stirred to form a uniform slurry. While continuously stirring this slurry, the water-soluble metal salt equivalent to 0.6-2.0 times, preferably 1-1.2 times the number-of-moles of the already-added N'acylamino acid water-soluble salt is slowly added dropwise.

As the water-soluble metal salt is added as described above, the N-acylamino acid water-soluble salt reacts with the water-soluble metal salt of Al, Mg, Ca, Zn, Zr and / or Ti to form a fine particle N-acylamino acid metal salt to the surface of the powder. Adsorbed sequentially. After completion of the addition of the water-soluble metal salts of Al, Mg, Ca, Zn, Zr and / or Ti, stirring is continued for about 10 minutes and then left to mature for at least about 1 hour. Next, the solids are filtered and washed with a centrifuge, a vacuum filter, or the like and sufficiently dried at about 80 to 150 ° C. The dried solid is crushed into individual particles using a grinder such as an atomizer to prepare an amino acid surface treated powder.

Next, the surface of the amino acid surface treatment powder is coated with silicone fatty ester in two steps. That is, the amino acid surface-treated powder prepared by the above method is placed in a mixing grinder such as a Henschel mixer, and continuously stirred and mixed while spraying and adding a silicone fatty ester solution dissolved in a solvent such as ethanol, isopropyl alcohol, and acetone with a spray. The mixture is sufficiently mixed to uniformly coat the silicone fatty ester on the surface of the powder, followed by heat treatment at about 80 to 200 ° C. to stabilize the coating to prepare the amino acid / silicone fatty ester composite surface treatment powder of the present invention. The throughput of the silicone fatty ester is in the range of 0.5 to 10%, preferably 0.5 to 3%, based on the weight of the raw material powder before the treatment, and is preferably 0.5 to 2 times the amino acid throughput.

If the amount of the silicone fat ester is too small compared to the amount of amino acid treatment, it is difficult to impart strong water resistance, lubricity, etc. of the silicone fat ester, and if too much, the amino acid is completely wrapped to coat the amino acid.

The water-soluble metal salts are water-soluble salts of Al, Mg, Ca, Zn, Zr and / or Ti, for example, aluminum nitrate, aluminum chloride, aluminum sulfate, magnesium chloride, magnesium sulfate, magnesium nitrate, calcium chloride, calcium nitrate and calcium acetate And zinc chloride, zinc nitrate, zinc sulfate, zinc acetate, zirconium sulfate, zirconium chloride, titanium oxysulfate, titanium tetrachloride, triethanolamine titanate and the like.

The method for producing the composite surface-treated powder of the present invention has been described above by way of one example. Unlike the above, it may also be prepared by simultaneously surface-treating amino acids and silicone fatty esters.

For example, in the process of producing the amino acid-treated powder of the first step, the silicone fatty ester may be added to the water surface slurry to adhere to the surface of the powder. Also in this method, the amino acid and the silicone fatty ester may be added to the powder surface at the same time during the production and adsorption reaction of the N­acylamino acid metal salt, or may be added and coated again after the amino acid surface treatment is completed.

As described above, in the composite surface-treated powder of the present invention, two kinds of materials having different physical properties of N 아미노 acylamino acid metal salt and silicone fatty ester are adsorbed or coated on the surface of the powder together. In other words, the N­acylamino acid metal salt is adsorbed on the surface of the powder in the form of fine particles, and the silicone fatty ester is coated on the surface of the powder in the form of a uniform film while filling between the adsorbed amino acid particles. Due to this surface treatment structure, silicone fat ester with very good lubricity improves the feeling of Nacylamino acid metal salt microparticles to give skin a smooth feeling and malleability, and N acyl was weakly adsorbed due to the firm adhesion of silicone fat ester. Since the amino acid metal salt microparticles are strongly adhered to the surface of the powder, it can be seen that it is possible to provide a surface-treated powder having a higher water resistance than the conventional amino acid treated powder.

In addition, since the silicone fatty ester used in the present invention is a non-occlusive substance, the amino acid on the surface of the powder does not block the path acting on the skin surface, thereby maintaining the advantages of the conventional amino acid surface treatment powder. . By using the surface-treated powder having excellent physical properties as mentioned above, it is possible to produce a color cosmetic having a smooth and moist feeling of long-lasting.

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

(Example 1)

Talc surface-treated with aluminum N laruroyl ­ L ­ glutamate and dimethiconol stearate

One step manufacturing process;

Into a 5-liter three-necked flask, 2.5 liters of water was added and 500 g of talc (Talk JA46R manufactured by ASADA, Japan) was stirred and mixed thoroughly to form a slurry suspension.The flask was heated to raise the temperature to 80 ° C., followed by sodium N. 7.5 g of luroyl L glutamate was added and mixed. 20 ml of aluminum sulfate 20% aqueous solution was slowly added to this suspension over 5 minutes, continuing stirring. After further stirring for about 10 minutes, the heating was stopped and allowed to stand for about 1 hour. The slurry was filtered and dehydrated in a suction filter, and then the filter cake was collected and placed in a drier and dried overnight at 120 ° C. The dried cake was crushed using a laboratory small atomizer to obtain amino acid surface treated talc powder.

Two stage manufacturing process;

500 g of the amino acid treated talc prepared as described above was added to a Henschel blender, and a solution of 7.5 g of dimethiconol stearate (SilWax S of SilTech, USA) in 30 ml of ethanol was added by spray spraying into the Henschel blender. After sufficiently stirring for 20 minutes, the powder was recovered, dried and heat-treated at 120 ° C. overnight in a drier to prepare an amino acid / silicone fatty ester composite surface treatment talc.

(Example 2)

Sericite surface-treated with magnesium N-lauroyl-L-methylglycine and dimethiconol hydroxystearate

Into a 5-liter three-necked flask, 2.5 liters of water was added and 500 g of sericite (Serisite FSE from SANSHIN Mining Co., Ltd.) was mixed and mixed thoroughly to form a slurry suspension, and the flask was heated to raise the temperature to 60 ° C., followed by sodium 10 g of N lauroyl L methyl glycine was added and mixed. 50 ml of magnesium sulfate 10% aqueous solution was slowly added to this suspension over 5 minutes, continuing stirring. After further stirring for about 10 minutes, a solution of 10 g of dimethiconol hydroxystearate (SilWax C from SilTech, USA) in 50 ml of ethanol was injected over about 10 minutes. Stirring was continued for 20 minutes, then heating was stopped and left to stand for about 1 hour. Thereafter, the slurry was filtered through a suction filter, dehydrated, and the filter cake was collected and placed in a drier and dried overnight at 120 ° C. The dried cake was pulverized using a laboratory small atomizer to prepare an amino acid / silicone fatty ester composite surface treatment amino acid sericite powder.

(Example 3)

Mica surface-treated with zinc N­stearoyl­N­methylglycine­β­alanine and dimethiconol stearate

Into a 5-liter three-necked flask, 2.5 liters of water, while stirring, 500 g of mica (Mica A325 from Sigma Co., Ltd.) was added and mixed thoroughly to form a slurry suspension, and the flask was heated to raise the temperature to 70 ° C., followed by sodium N-stea. 7.5 g of loyl-N-methylglycine-β-alanine was added and mixed. 40 ml of zinc acetate 10% aqueous solution was slowly added to the suspension over 5 minutes while stirring was continued. Then, the mixture was further stirred for about 10 minutes, and then the heating was stopped and allowed to stand for about 1 hour. Thereafter, the slurry was filtered through a suction filter, dehydrated, and the filter cake was collected and placed in a drier and dried overnight at 120 ° C. The dried cake was crushed using a laboratory small atomizer to obtain amino acid surface treated mica powder.

500 g of the amino acid-treated mica prepared as described above was added to a Henschel mixer, and a solution of 7.5 g of dimethiconol stearate (SilWax S of SilTech, USA) in 40 ml of ethanol was added by spray spraying into the Henschel mixer. After sufficiently stirring for 20 minutes, the powder was collected, dried and heat-treated at 120 ° C. overnight in a dryer to prepare an amino acid / silicone fatty ester composite surface treated mica.

(Comparative Example 1)

Talc, surface-treated with aluminum N­laruroyl­L­glutamate

An amino acid surface treatment talc was prepared by substantially the same procedure as in Example 1, except that 15 g of sodium N­laruroyl­L­glutamate was added and 40 ml of aluminum sulfate 20% aqueous solution was used.

(Comparative Example 2)

Talc surface-treated with dimethiconol stearate

A solution of 15 g of dimethiconol stearate (SilWax S from SilTech, USA) in 60 ml of ethanol was added to a 500 g Henschel blender with talc (Talk JA­46R manufactured by ASADA, Japan) while stirring and spray sprayed into the Henschel blender. After sufficiently stirring for 20 minutes, the powder was recovered, dried and heat-treated at 120 ° C. overnight in a drier to prepare a silicone fat ester surface-treated talc.

(Test Example 1)

Water resistance test of surface treated powder

The water resistance of the surface-treated powder for cosmetics manufactured in Example 1, Comparative Example 1, and Comparative Example 2 was tested by the following method.

20 ml of distilled water was added to the test tube, 0.1 g of powder was added thereto, the mixture was shaken vigorously for 30 times, and the appearance after standing for 30 minutes was observed. In the evaluation method, the powder and liquid phases were completely separated from each other, and the powder was dispersed in the liquid, and the opaque state was 1, and the turbidity was used as an index. The results are shown in Table 1.

Water resistance comparison evaluation result Example 1 Comparative Example 1 Comparative Example 2 Composite surface treatment powder of the present invention Amino acid treatment powder Silicone Fatty Ester Surface Treatment Powder Water resistance evaluation index 4 2 3

(Formulation example 1)

The raw materials 1 to 8 shown in Table 2 were mixed in a Hansel mixer, and then the raw materials 9 to 11 shown in Table 2 were dissolved at 80 ° C., sprayed, mixed again, crushed by an atomizer, and then sieved. Daily sealed storage, aged and molded.

(Comparative Formulation Examples 1 and 2)

Molding was carried out in the same manner as in Formulation Example 1 except that the talc of Comparative Example 1 and Comparative Example 2 was used.

Name Prescription My brother example 1 Comparative Formulation Example 1 Comparative Formulation Example 2 1. Serisite 20 20 20 2. Mica 25 25 25 3. kaolin 4 4 4 4. Silica 5 5 5 5. Talc (Example 1 Treatment) to 100 - - 6. Talc (Comparative Example 1 Treatment) - to 100 - 7. Talc (Comparative Example 2 Treatment) - - to 100 8. Iron Oxide 8 8 8 9. Liquid paraffin 5 5 5 10. Preservative 0.15 0.15 0.15 11. Spices 0.2 0.2 0.2

(Test Example 2)

After comparing and reviewing the malleability, skin adhesion, hiding power, skin color expression power, and moist feeling of the twin cakes prepared in Formulation Examples and Comparative Formulation Examples 1 and 2, 50 women aged 25 to 35 years were evaluated. Table 3 shows.

Malleability Skin adhesion Moist feeling Hiding power Skin expression Formulation Example 1 5 5 5 4 5 Comparative Formulation Example 1 3 5 2 4 3 Comparative Formulation Example 2 4 3 4 4 5 ▶ 5: Very good, 4: Slightly good, 3: Normal, 2: Slightly bad, 1: Very bad

As can be seen from Table 1, the composite powder of the present invention has much better water resistance than conventional amino acid-treated powders, thereby providing a long-lasting color cosmetic having superior long-lasting compared to color cosmetics using conventional amino acid-treated powders. can do.

In addition, as can be seen in Table 3, when applied to the skin of a twin cake using only the amino acid-treated powder (Comparative Example 1), the skin adhesion was excellent, but the malleability and skin expression was inferior, silicone fat When applied to the skin of a twin cake using only the powder treated with ester (Comparative Example 2), the ductility and skin expressive power was excellent, as opposed to the former case, but the skin adhesion was poor. However, when applied to the skin a twin cake using a powder (Example 1) complex surface treatment with an amino acid and a silicone fat ester according to the present invention, the malleability of the particles is improved and the adhesion to the skin is improved, the makeup is not lifted In particular, the moist feeling in the skin was found to be excellent. In addition, while expressing the original skin color appeared to have the advantage of effectively concealing the skin defects.

As described above, by using the surface-treated powder according to the present invention complexed with an amino acid and a silicone fat ester as a component of the color cosmetic, it has excellent malleability and skin adhesion, and in particular, combines skin expression and moist feeling in the skin. Long-lasting color cosmetics can be provided.

Claims (5)

Composite surface-treated powder coated with powder of metal salt of N­acylamino acid and silicone fatty ester. The silicone fatty acid ester according to claim 1, wherein the silicone fatty ester is a lipid modified silicone compound prepared by esterifying a hydroxy (OH) group of a silicone polymer with a fatty carboxylic acid, ester or anhydride having 11 to 20 carbon atoms. Composite surface treatment powder. 3. The surface-treated powder according to claim 2, wherein the silicone fatty ester is selected from dimethiconol stearate and dimethiconol hydroxystearate. To the powder suspended in water, N-acylamino acid water-soluble salt was added at 0.5 to 10% of the weight of the powder, and then water-soluble metal salt was added dropwise at 0.6 to 2.0 times the number of moles of N-acylamino acid water-soluble salt to remove the metal salt of N-acylamino acid. Coating on the surface of the powder and the surface of the powder is a method for producing a composite surface treatment powder, comprising the step of coating the silicone fatty ester with 0.5 to 10% by weight of the powder. Color cosmetic composition consisting of the powder according to claim 1 used in foundation, liquid foundation, lipstick or eye shadow.