KR20140144848A - Method for preparing cosmetic composition containing titanium dioxide - Google Patents

Abstract

The present invention relates to a method for preparing a cosmetic composition having an excellent whitening function, and more specifically, to a method for preparing a cosmetic composition, wherein the method comprises the steps of: adding a silicone oil to a titanium dioxide powder coated with an alkyl silane powder, followed by mixing, to prepare slurry; and putting the slurry between a first roller and a second roller, which rotate in opposite directions, to disperse the powder within the slurry, and thus clumping or patchiness does not occur.

Description

[0001] The present invention relates to a method for preparing a cosmetic comprising titanium dioxide,

The present invention relates to a method for producing a cosmetic material having an excellent whitening function.

Titanium dioxide has been applied to a wide variety of cosmetics since it has excellent skin whitening effect, shading effect, and light stability.

However, when an inorganic powder such as titanium dioxide is used as it is, the dispersibility is poor and flocculation is easily caused, the spreadability is lowered, and problems such as clouding phenomenon and caking phenomenon in which the formulation is hardened may occur.

Accordingly, studies are underway to solve such problems and to use surface treatment of titanium dioxide with various materials for improvement of light dispersibility, improvement of skin contact feeling, water repellency and the like.

In the case of using the titanium dioxide by surface treatment, there is a problem in that it is not appropriate in terms of time and economy since the powder must be treated in advance in addition to the step of producing the cosmetic. In order to solve such a disadvantage, Solid cosmetics are being developed. Conventional solid cosmetic formulations are prepared by mixing extender pigments, pigments and white pigments in a mixer and then spraying similar binders to produce uniform mixing, while wet coating of the slurry process can improve these disadvantages.

However, the cosmetic material containing titanium dioxide produced by a wet process has a problem that the titanium dioxide particle size becomes large in the process and the covering power is lowered. Therefore, there is a need to develop a manufacturing method capable of maintaining an appropriate particle size.

Korean Patent Laid-Open No. 2012-0119330 discloses a wet molded makeup cosmetic composition and a method for producing the wet form makeup cosmetic composition. However, the wet forming method is used as a surface modification treatment method of the powder, but the problem of the powder dispersibility is not solved.

Korea Patent No. 2012-0119330

The present invention provides a method for producing a cosmetic material containing titanium dioxide having an excellent dispersing ability and a cosmetic material therefrom.

1. A process for producing a slurry by adding a silicone oil to a powder of titanium dioxide coated with an alkylsilane compound and then mixing the mixture; And putting the slurry between a first roller and a second roller rotating in opposite directions to disperse the powder in the slurry.

2. The method of manufacturing a cosmetic material according to 1 above, further comprising adding rice bran oil or a vitamin C derivative to the slurry.

3. The method of manufacturing a cosmetic material as set forth in claim 1, further comprising the step of adding titanium dioxide to a coating solution containing an alkylsilane compound, followed by drying to produce a titanium dioxide powder coated with the alkylsilane compound.

4. The method of producing a cosmetic material according to 3 above, wherein the coating liquid comprises 10 to 30% by weight of an alkylsilane compound, 0.1 to 10% by weight of an oil and 60 to 80% by weight of a solvent.

5. The method for producing a cosmetic material according to 3 above, wherein the titanium dioxide is added in an amount of 0.1 to 30 parts by weight based on 100 parts by weight of the coating liquid.

6. The process according to 3 above, wherein the drying is carried out at 50 to 70 DEG C for 2 to 5 hours.

7. The method for producing a cosmetic material according to 1 above, wherein the silicone oil is added in an amount of 10 to 200 parts by weight based on 100 parts by weight of the powder.

8. The method of manufacturing a cosmetic material as set forth in claim 1, further comprising the step of transferring the dispersed slurry by the conveying means and throwing it into a gap between the second roller and a third roller having a different rotation direction from the second roller.

9. The method for producing a cosmetic material as in 1 above, wherein the particle size of titanium dioxide coated in the slurry after the dispersing step satisfies 0.1 to 1 占 퐉.

The cosmetic material according to the present invention is excellent in skin whitening function by containing titanium dioxide.

The cosmetic material according to the present invention is produced by physically dispersing titanium dioxide coated with an alkylsilane compound, so that the cosmetic material has excellent dispersing power and does not cause the accumulation of makeup or lifting phenomenon at the time of use.

The cosmetic material according to the present invention is excellent in water repellency.

The cosmetic material according to the present invention is excellent in skin adhesion and skin affinity.

1 is a schematic view schematically showing a roller used in the dispersing step according to the present invention.

The present invention relates to a method for producing a titanium dioxide powder, comprising the steps of adding a silicon oil to a powder of titanium dioxide coated with an alkylsilane compound and then mixing to prepare a slurry, and putting the slurry between a first roller and a second roller rotating in opposite directions, And dispersing the slurry in the slurry. The present invention relates to a method for producing a cosmetic material, and more particularly, to a method for producing a cosmetic material, which comprises dispersing the slurry in the slurry.

Hereinafter, the present invention will be described in detail.

The method for producing a cosmetic material according to the present invention can include the steps of producing a slurry containing titanium dioxide and dispersing the slurry using a roller.

<Slurry Production Step>

The step of preparing the slurry can uniformly include the titanium dioxide compound coated with the alkylsilane compound in the silicone oil through high-speed agitation so that the dispersion of the titanium dioxide compound can be more easily performed in the physical dispersion process using the roller do. Further, by forming the cosmetic material into a slurry formulation having a viscosity, it becomes possible to form a cosmetic material without destroying the titanium dioxide compound in a dispersion process using a roller.

The step of preparing the slurry may include a step of adding silicone oil to the powder of the titanium dioxide coated with the alkylsilane compound, followed by mixing.

The titanium dioxide (TiO ₂ ) used in the present invention is an inorganic powder having a whitening function, a shielding function and the like. In the present invention, the titanium dioxide coated on the surface thereof with an alkylsilane compound is used alone as the titanium dioxide It is possible to improve the disadvantage that the skin adhesion, persistence, water resistance and oil resistance are lowered.

The silicone oil used in the present invention is to make the titanium dioxide powder into a slurry form and facilitate the subsequent dispersion step. The type of the silicone oil is not particularly limited, and examples thereof include methylhydrogenpolysiloxane, dimethylpolysiloxane, methylphenylpolysiloxane, Silicone oil such as cyclopentasiloxane, gelatinized dimethyl polysiloxane with high polymerization degree, and gelated dimethyl siloxane / methylphenyl siloxane copolymer. These may be used alone or in combination of two or more.

The content of the silicone oil is not particularly limited, but may be 10 to 200 parts by weight based on 100 parts by weight of the coated titanium dioxide powder.

The method of manufacturing a cosmetic material according to the present invention may further include adding rice bran oil and a vitamin C derivative. The whitening function and skin moisturizing function of the rice bran oil and the vitamin C derivative together with titanium dioxide The function can be remarkably improved.

The method of manufacturing a cosmetic material according to the present invention may further comprise the step of producing a titanium dioxide powder coated with an alkylsilane compound.

The step of preparing the titanium dioxide powder coated with the alkylsilane compound may be carried out by a wet coating process in which titanium dioxide is added to a coating solution containing an alkylsilane compound and then dried.

The coating liquid composition may contain an alkylsilane compound, a solvent and an oil.

The alkylsilane compound used in the present invention is a component that functions as a binder of the titanium dioxide surface coating layer and can improve the skin adhesion feeling, durability, water resistance and oil resistance. The kind of the alkylsilane compound is not particularly limited and includes, for example, trimethylsiloxysilicate, methylhydrogenpolysiloxane, hexamethylcyclotrisiloxane, octamethylpolysiloxane, methylcyclopolysiloxane, octamethylcyclotetrasiloxane, Pentadecyloxane, tetradecamethylcycloheptasiloxane, and triethoxycaprylylsilane. These may be used singly or in combination of two or more.

The content of the alkylsilane compound is not particularly limited and may be 10 to 30% by weight based on the total weight of the coating liquid composition.

The solvent used in the present invention is preferably volatile so that it can be easily removed after the wet coating process of titanium dioxide. The solvent is not particularly limited as long as it has volatility, and examples thereof include methanol, ethanol, propanol, isopropanol, Butanol, etc. These may be used alone or in combination of two or more.

The content of the solvent is not particularly limited, but may be in the range of 60 to 80% by weight based on the total weight of the coating liquid composition.

The kind of oil used in the present invention is not particularly limited and includes, for example, beeswax, candelilla wax, montan wax, lanolin, liquid lanolin, rice wax, cotton wax, carnauba wax, pewter, wax, polyoxyethylene lanolin Waxes such as alcohol ethers, polyoxyethylene lanolin alcohol acetates, isopropyl lanolate, hexyl laurate, jojoba wax, and hard lanolin; Natural vegetable oils such as avocado oil, macadamia nut oil, corn oil, olive oil, apricot seed oil, bar bass oil, castor oil, flaxseed camellia oil and jojoba oil; Liquid fats such as triglycerin, glycerin trioctanoate, and glycerin triisopalmitate; Cocoa oil, coconut oil, hardened palm oil, palm oil and the like; Hydrocarbons such as liquid paraffin, ozokerite, squalane, paraffin, ceresin, squalane, vaseline, and microcrystalline wax; But are not limited to, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, myristyl lactate, lanolin acetate, isocetyl stearate, dipentaerythritol fatty acid ester, dicapric acid neopentyl glycol, diisostearyl malate, Trimethylol propane, trimethylolpropane trimethylolpropane, trimethylolpropane trimethylacetate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, oleic acid oil and acetyl glyceride. Or more

The content of the oil is not particularly limited, but may be in the range of 0.1 to 10% by weight based on the total weight of the coating liquid composition.

The step of preparing the coated titanium dioxide powder according to the present invention can be performed by dispersing the coating solution, adding titanium dioxide to the dispersed coating solution, and stirring at a high speed, wherein the titanium dioxide particles are not agglomerated It is possible to form a coating layer of a uniform alkylsilane compound on the surface of each particle.

The content of the titanium dioxide is not particularly limited but may be in the range of 0.1 to 30 parts by weight based on 100 parts by weight of the coating liquid composition. When the content is less than 0.1 parts by weight, the coverage may be poor. When the content is more than 30 parts by weight, There is a problem that it is not uniformly applied.

After the alkylsilane compound coating layer is formed on the surface of the titanium dioxide by the wet process, the titanium dioxide powder can be produced through a drying process.

The drying process is for removing the volatile solvent to obtain coated titanium dioxide powder, and may be performed in a dryer at 50 to 70 ° C for 2 to 12 hours.

<Physical dispersion step>

The slurry containing the coated titanium dioxide powder prepared through the above-described process can be subjected to a step of putting it into a roller and dispersing it.

The dispersing step may be performed by mixing the titanium dioxide powder coated in the slurry to improve the skin adhesion feeling, durability, water resistance and oil resistance when used as a cosmetic material. Further, the titanium dioxide having an increased particle diameter due to the coating layer is pulverized to have an appropriate particle size, whereby the aggregation phenomenon and the whitish phenomenon can be remarkably lowered at the time of use.

The dispersing step according to the present invention can be carried out by putting the prepared slurry between a first roller and a second roller rotating in mutually opposite directions to uniformly pulverize and mix the titanium dioxide powder in the slurry.

After the dispersing step, the coated titanium dioxide compound may have a particle size of 0.1 to 1 占 퐉, preferably 0.5 to 1 占 퐉. If the coated titanium dioxide compound has a particle size within the range of 0.5 to 1 占 퐉, the aggregation phenomenon and the whitening phenomenon can be remarkably lowered.

The interval between the first roller and the second roller is set at a predetermined interval, and the interval is not particularly limited, but may be 0.5 to 1 탆 in consideration of the optimum particle size of the titanium dioxide.

The rotational speeds of the first roller and the second roller through which the slurry passes are not particularly limited, and the rotational speeds of the two rollers may be rotated at different speeds to improve the dispersing force.

The dispersing step may further include redispersing by the third roller adjacent to the second roller. The third roller is located at a predetermined distance from the second roller and rotates in a direction opposite to the rotating direction of the second roller to disperse the slurry.

The slurry having passed through the first roller and the second roller is moved between the second roller and the third roller through the conveying means and can be redispersed by passing between the second roller and the third roller.

The cosmetic material of the present invention is not particularly limited in the form of the cosmetic material of the present invention and examples thereof include lotion, essence, nutrition cream, eye cream, sun cream, body lotion, bar diesel, foundation, makeup base, face powder, Rose, eye shadow, and the like.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to examples.

Example  One

60 g of isopropanol and 10 g of 30 g of cyclopentasiloxane oil are mixed to form a coating liquid composition. The prepared coating solution is dispersed at 2000 rpm for 20 minutes. 20 g of the titanium dioxide compound is added to the dispersed coating solution, and the mixture is stirred at 3000 rpm for 10 minutes. Thereafter, the resultant was dried at 50 DEG C for 10 hours to obtain a titanium dioxide powder coated with an alkylsilane compound.

10 g of the coated titanium dioxide powder obtained was mixed with 20 g of silicone oil dimethylpolysiloxane to prepare a slurry.

The prepared slurry was dispersed by passing through a first roller and a second roller located at intervals of 0.5 mu m.

Example  2

5 g of rice bran oil and 5 g of vitamin C were further added.

Comparative Example  One

The procedure of Example 1 was repeated except that the physical dispersion step was not carried out.

Test Methods

The base cosmetic composition including the cosmetic material prepared by the methods of Examples 1 and 2 and Comparative Example 1 was compared and evaluated for four items such as product adhesion, soft feeling, wettability and moistness. The comparative evaluation was conducted after using the product of the present invention for 10 days for 10 days for women, and the results are shown in Table 2 below.

The measurement standard is as follows.

5 points: very good

4 points: Excellent

3 points: Normal

2 points: Poor

1 point: very bad

A sense of closeness Soft feeling Brittle Moistness Example 1 3.7 4.0 4.5 3.8 Example 2 4.2 4.0 4.5 4.7 Comparative Example 1 3.0 2.8 2.9 3.5

As shown in Table 2, Examples 1 and 2, which were cosmetic materials that had undergone the physical dispersion step according to the present invention, were highly evaluated in terms of the quality of adhesion, soft feel, wettability and moisture.

Example 2, which further contained rice bran oil and vitamin C derivatives, was highly evaluated in terms of quality of adhesion and moisturizing.

However, in the case of Comparative Example 1 in which the physical dispersion step of the present invention was not carried out, the evaluation was significantly lowered in terms of soft feeling and wettability.

Claims (9)

Adding a silicone oil to a powder of titanium dioxide coated with an alkylsilane compound and then mixing to prepare a slurry; And
Placing the slurry between a first roller and a second roller rotating in opposite directions to disperse the powder in the slurry;
&Lt; / RTI &gt;
The method of claim 1, further comprising adding rice bran oil or a vitamin C derivative to the slurry.
2. The method of manufacturing a cosmetic material according to claim 1, further comprising the step of adding titanium dioxide to a coating solution containing an alkylsilane compound, followed by drying to prepare a titanium dioxide powder coated with the alkylsilane compound.
4. The method of claim 3, wherein the coating liquid comprises 10 to 30 wt% of an alkylsilane compound, 0.1 to 10 wt% of oil, and 60 to 80 wt% of a solvent.
4. The method according to claim 3, wherein the titanium dioxide is added in an amount of 0.1 to 30 parts by weight based on 100 parts by weight of the coating liquid.
The method according to claim 3, wherein the drying is performed at 50 to 70 ° C for 2 to 5 hours.
The method according to claim 1, wherein the silicone oil is added in an amount of 10 to 200 parts by weight based on 100 parts by weight of the powder.
The method according to claim 1, further comprising the step of transferring the dispersed slurry by a conveying means to introduce the dispersed slurry into the space between the second roller and a third roller different in rotational direction from the second roller to redisperse the dispersed slurry.

The method according to claim 1, wherein the particle size of the titanium dioxide coated in the slurry after the dispersing step satisfies 0.1 to 1 탆.

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