KR100474934B1 - Manufacturing method for aluminium hydroxide and composition for cosmetics comprising aluminium hydroxide - Google Patents

Abstract

The present invention is a cosmetic composition comprising the ultra-fine particles, specifically a particle size of 5 to 200nm aluminum hydroxide and the ultra-fine aluminum hydroxide prepared by the production method, in particular the removal of waste in the pores, exfoliation and fungal infections, acne The present invention relates to a cosmetic composition effective for the prevention and treatment of skin problems such as dermatitis.

Method for producing aluminum hydroxide according to the present invention comprises the steps of adding an acid in an aqueous solution of aluminum, aluminum alloy or aluminum compound to produce an aluminum ion solution of Al ⁺³ ; And the aluminum ion solution (OH) a ^- in addition to the alkali solution of comprises the step of precipitation of aluminum hydroxide of Al (OH) _3, cosmetic compositions according to the present invention include aluminum hydroxide is 5 to 200nm particle size, Preferably from 0.2 to 70% by weight.

Cosmetics prepared with the cosmetic composition as described above has a neutralizing function of the skin, anion and far infrared radiation, antifungal function, antibacterial function, which is effective in protecting skin and improving skin trouble, and also contains ultra-fine aluminum hydroxide of 5 to 200 nm. As a result, the skin contact area and skin adhesion were increased so that the above-described effects could be quickly exerted deep into the skin.

Description

Manufacturing method for aluminum hydroxide and composition for cosmetics comprising aluminum hydroxide}

The present invention is a cosmetic composition comprising the ultra-fine particles, specifically a particle size of 5 to 200nm aluminum hydroxide and the ultra-fine aluminum hydroxide prepared by the production method, in particular the removal of waste in the pores, exfoliation and fungal infections, acne The present invention relates to a cosmetic composition effective for the prevention and treatment of skin problems such as dermatitis.

Aluminum hydroxide refers to a hydroxide of aluminum, the formula is Al (OH) ₃ , specific gravity is 2.423. It exists naturally as a gibbsite and a diaspore, and when ammonia water is added to the aqueous solution of an aluminum salt, it arises as a white colloidal precipitation. Upon heating, one molecule of water is lost at 300 ° C. It is an amphoteric hydroxide, reacts with alkali to form aluminate, and reacts with acid to form its salt.

Aluminum hydroxide is converted into gel state when it is in contact with water for a long time.It is used as adsorbent, ion exchanger, chromatographic fixer, and raw material for aluminum oxide, as a weight agent for paper. It is also used as an additive in the manufacture of tarpaulins and as an antacid.

As described above, in the manufacturing method of aluminum hydroxide, bauxite is dissolved in a high concentration of sodium hydroxide solution under a heated pressurized state to form sodium aluminate, and after removal of undissolved impurities through the standing and filtering process, Gibbsite is added as a seed, and a method of precipitation of aluminum hydroxide by hydrolysis of sodium aluminate using a solubility difference with temperature is widely used. After synthesizing an aluminum alkoxide, the method of hydrolyzing an aluminum alkoxide to make aluminum hydroxide is known.

However, there is a problem in that the method as described above cannot produce ultra fine particles in nanometer units.

Therefore, the present inventors have completed the method of producing aluminum hydroxide ultra-fine particles in nanometers, specifically, ultra-fine particles having a particle diameter of 5 to 200 nm to achieve the present invention.

In addition, the present inventors use the aluminum hydroxide having a particle diameter of 5 to 200 nm in the cosmetics applied to the skin such as makeup soap, cleansing cream, nourishing cream, moisturizing cream, cleansing liquid, etc. The present invention has been found to be able to manufacture cosmetics effective for the prevention and treatment of skin problems such as infections, acne, dermatitis and the like.

Accordingly, an object of the present invention is to provide a method for producing ultrafine particles of nanometers, specifically ultrafine aluminum hydroxide having a particle diameter of 5 to 200nm.

In addition, another technical problem to be achieved by the present invention is to provide a cosmetic composition that can be used to prepare cosmetics that are effective in the removal of the waste in the pores, as well as in the removal and exfoliation of the pores and the prevention and treatment of skin problems such as fungal infections, acne, dermatitis. have.

In order to achieve the above technical problem, the present invention comprises the steps of adding an acid in an aqueous solution of aluminum, aluminum alloy or aluminum compound to produce an aluminum ion solution of Al ^{+ 3} ; And precipitating aluminum hydroxide of Al (OH) ₃ by adding an alkali solution of (OH) ⁻ to the aluminum ion solution, thereby providing a method for producing aluminum hydroxide having a particle diameter of 5 to 200 nm.

In addition, in order to achieve the above another technical problem, the present invention provides a cosmetic composition comprising aluminum hydroxide having a particle diameter of 5 to 200nm.

In the cosmetic composition according to the present invention as described above, the aluminum hydroxide is a step of adding an acid in an aqueous solution of aluminum, aluminum alloy or aluminum compound to produce an aluminum ion solution of Al ⁺³ ; And the aluminum ion solution (OH) a ^- in addition to an alkaline solution of, and may be prepared through the step of precipitation of aluminum hydroxide of Al (OH) _3, its content can be 0.2 to 70 wt% in the entire cosmetic composition have.

Hereinafter, a method for preparing aluminum hydroxide ultrafine particles according to the present invention and a cosmetic composition including ultrafine aluminum hydroxide will be described in detail.

First, look at the manufacturing method of the ultra-fine aluminum hydroxide according to the present invention.

The acid is added while the aluminum metal, aluminum alloy and aluminum compound are kept in an aqueous solution at a temperature of 15 to 100 ° C. 15 ° C. is the room temperature of the solution, and 100 ° C. is the boiling point which is the maximum temperature of the solution. The acid may be added in excess until Al in the solid state becomes an Al ³⁺ ion solution.

Then, an alkaline solution of (OH) ⁻ is added to adjust the pH to 7-14 to precipitate and separate Al ³⁺ ions into Al (OH) ₃ solid powder. At this time, since pH7 is less than acid, it is difficult to obtain aluminum hydroxide, and pH14 is the pH value of the highest alkali region.

Subsequently, aluminum nanoparticles having ultrafine particles of 5 to 200 nm in diameter may be prepared by selectively separating large nanometer particles and small nanometer particles through several stages of filtration and drying them in a dryer.

Next, a cosmetic composition containing aluminum hydroxide having a particle diameter of 5 to 200 nm will be described.

Cosmetics defined herein refers to basic cosmetics used for washing and protecting the skin, such as cosmetic soap, nourishing cream, moisturizing cream, cleansing cream, cleansing liquid, the cosmetic composition according to the present invention has a particle diameter of 5 to 200nm It is prepared through the same process as the preparation of a general cosmetic composition except that it includes phosphorus aluminum hydroxide, preferably 0.2 to 70% by weight.

For example, if the cosmetic composition according to the present invention is a cosmetic soap composition, aluminum hydroxide and other perfumes, pigments, moisturizers or the like in a cosmetic soap base prepared by neutralizing tallow, palm oil, palm oil, palm kernel oil and the like with an alkali metal or an organic alkali or the like. In order to improve the physical properties, inorganic salts, synthetic polymer materials and the like are mixed to prepare a conventional manufacturing method.

Cosmetics prepared by the cosmetic composition according to the present invention as described above is an amphoteric compound that neutralizes in response to both acidity and alkalinity, and is currently used as an anionic compound aluminum hydroxide widely used worldwide as a main ingredient of gastrointestinal drugs Because it contains, it has an excellent effect on neutralizing the skin.

In addition, the cosmetics prepared by the cosmetic composition according to the present invention has the property that the anion and far infrared rays are emitted because it contains an anionic compound aluminum hydroxide, when used on the skin directly affected by the release of anion and far infrared skin Cosmetic, skin improvement, antibacterial and antifungal efficacy.

Furthermore, since the cosmetic composition according to the present invention contains ultrafine aluminum hydroxide having a particle diameter of 5 to 200 nm, the skin contact surface area of aluminum hydroxide is extremely increased, so that the neutralization rate of the skin proceeds sufficiently even at the time of normal washing or washing of the face. In addition, since the particle size is smaller than the pores or sweat pores of the skin, the particle size may be in contact with not only the surface of the skin but also deep into the skin, thereby exhibiting an excellent effect on skin neutralization and skin trouble improvement.

And, the content of the aluminum hydroxide as described above is limited to 0.2 to 70% based on the total weight of the cosmetic composition, the aluminum hydroxide used in the present invention when producing a cosmetic for the neutralization reaction, antibacterial and antifungal reaction of the skin Because the particle size is 5 to 200nm ultra fine particles, the skin contact surface area and adhesion to the skin is excellent, and the low content of 0.2% can achieve a sufficient effect, and also exfoliate the area such as the sole of the human skin. If the primary purpose should be used, the maximum content is limited to 70% because it should maximize the anion and far-infrared emission by aluminum hydroxide within the range to maintain the basic efficacy, such as skin cleansing power. Therefore, when the content is less than 0.2%, the effect of containing aluminum hydroxide is not seen, and when it is contained more than 70%, there is a problem in that the basic efficacy such as skin cleansing power cannot be exhibited.

In addition, the particle diameter of aluminum hydroxide in the present invention is preferably 5 to 200nm, it is extremely difficult to manufacture aluminum hydroxide having a particle diameter of less than 5nm, and also in the contact reaction to the depth of the skin in relation to the size of pores and pores This is because the most preferable size is a particle diameter not exceeding 200 nm.

Hereinafter, the present invention will be described in detail with reference to Examples, and the following Examples are not intended to limit the present invention.

Example 1 Preparation of Aluminum Hydroxide

Metal aluminum was added to a solution containing purified water, and excess hydrochloric acid was slowly added at room temperature to prepare a trivalent aluminum ion solution. Then, a small amount of aqueous sodium hydroxide solution was added until the pH reached 7, to precipitate aluminum hydroxide.

Subsequently, the aluminum hydroxide powder obtained by centrifugation was again dispersed in purified water, filtered, and finally, the aluminum hydroxide obtained by filtration was dried in a dryer to obtain dry aluminum hydroxide powder of ultrafine particles.

As a result of measuring the particle size distribution using the electron scanning microscope for the aluminum hydroxide obtained by the above method, it was found that it is about 5 to 200nm, this electron scanning microscope picture is attached to FIG.

<Example 2>

Composition of the soap composition

25% by weight of oily tallow

Palm oil 15 wt%

Glycerin 4% by weight

* Alkaline Caustic Soda 6% by weight

* 35% by weight of purified water

* 15% by weight of aluminum hydroxide (particle size 5 to 200nm)

* Correct amount of other additives such as fragrances or pigments

Solid soap manufacture

The oil as described in the above composition was put in a double kiln, heated to 70 to 80 ° C. while stirring to make an emulsion, and then an aqueous solution of caustic soda prepared by dissolving powder caustic soda in purified water was added to the emulsion for 1 to 3 hours. While maintaining a temperature of 70 to 80 ℃ while stirring to prepare a good soap solution.

Subsequently, the temperature of the soap solution was cooled to 60 to 65 ° C., and then aluminum hydroxide powder was added, followed by stirring for 2-3 hours while maintaining the temperature at about 60 ° C. to obtain an aluminum hydroxide mixed synthetic soap.

Next, the aluminum hydroxide mixed soap was put into a compressor, pressed into chips, and then dried and pulverized to have a water content of about 15% by weight or less.

Finally, after adding an appropriate amount of other additives, such as flavoring and coloring, it was mixed in the mixer and then compression molded in a compressor to prepare a solid soap.

<Example 3>

Composition of cream type soap composition

* 2.5% by weight of oil lauric acid

7.5% by weight of myristic acid

Palmitic acid 2.5% by weight

2.5% by weight of oleic acid

* Moisturizing Lauroyl diethanolamide 5.0% by weight

* 20% by weight surfactant glycerin

* Alkali Potassium Hydroxide 3.6% by weight

* 46.4% by weight of purified water

* 10% by weight of aluminum hydroxide (particle size 5 ~ 200nm)

Cream soap production

The oil as identified in the above composition is placed in an oil phase and heated to 70-80 ° C. and stirred to maintain 70 ° C. Separately, purified water, propylene glycol, glycerin and potassium hydroxide are placed in a water phase and heated and stirred at about 70 ° C. .

Subsequently, the solution in the water phase is gradually added to the oil in the oil phase while stirring and pre-emulsion. Then, aluminum hydroxide powder is added to the pre-emulsified liquid and mixed at 60 ° C. for 1 to 2 hours to mix and mix the aluminum hydroxide powder and the synthetic cream soap. Was prepared.

Next, the aluminum hydroxide powder mixed cream was placed in a homogenizer, and the particles were uniformed, degassed and filtered, transferred to a storage tank, and filled into a container to produce aluminum hydroxide powder mixed and synthetic cream soap.

<Example 4>

Composition of nutrition cream

* 8% by weight of oil stearic acid

4% by weight of stearyl alcohol

Stearylbutyl 6 wt%

* Moisturizing Propylene Glycol 5% by weight

* Surfactant glycerin 2% by weight

* 0.4 wt% alkali potassium hydroxide

* 66% by weight of purified water

* Aluminum hydroxide (particle diameter 5 to 200nm) 8.6% by weight

Preparation of Nutritional Cream

The oil as identified in the above composition is placed in an oil phase and heated to 70-80 ° C. and stirred to maintain 70 ° C. Separately, purified water, propylene glycol, glycerin and potassium hydroxide are placed in a water phase and heated and stirred at about 70 ° C. .

Subsequently, the solution in the water phase is gradually added to the oil in the oil phase while stirring to pre-emulsion. Then, aluminum hydroxide powder is added to the pre-emulsified liquid and mixed at 60 ° C. for 1 to 2 hours to prepare an aluminum hydroxide powder mixed cream. It was.

Next, the aluminum hydroxide powder mixed cream was placed in a homogenizer, and the particles were uniformed, degassed and filtered, transferred to a storage tank, and filled into a container to produce an aluminum hydroxide powder mixed synthetic cream soap.

<Test Example 1: Far-infrared emission evaluation>

The solid soap prepared in the same manner as prepared in Example 1 was requested to test the far-infrared emission to the Korea Institute of Construction Materials Research and Evaluation Center, 1465-4, Seocho 3-dong, Seocho-gu, Seoul.

This test was carried out at 45 ° C and the results are shown in Table 1, and the measurement results compared to the black body (Black Body) using the FT-IR spectrometer.

Emissivity (5 ~ 20㎛) Radiation energy (W / m ² ) 0.894 3.87 x 10 ²

As shown in Table 1, it can be expected that the cosmetic soap containing aluminum hydroxide prepared by the soap composition according to the present invention emits far infrared rays and has an effect of improving antibacterial or skin troubles corresponding to the amount of far infrared rays emitted. .

<Test Example 2: Antifungal force test>

Solid soaps prepared in the same manner as in Example 1 were requested to the antifungal force test to the Korea Institute of Building Materials and Materials Evaluation and Evaluation Center, 1465-4, Seocho 3-dong, Seocho-gu, Seoul.

The test method was ASTM G-21, and the test strains were Aspergillus niger ATCC 9642, Penicillium pinophilum ATCC 11797, Chaetominu globosum ATCC 6205, Gliosiadium virens ATCC 9645, and Aureobasidium pullulans ATCC 15233. Incubation period was 4 weeks.

As a result of the test, it was determined that the growth of bacteria was not recognized at all after 4 weeks, and thus the cosmetic soap prepared with the soap composition according to the present invention was found to have antifungal activity, and judging from the bacteriological properties of the test strains, athlete's foot It can be expected to have a significant effect on such skin diseases.

Test Example 3: Antimicrobial Activity Test

The solid soap prepared in the same manner as prepared in Example 1 was requested to the antimicrobial activity test to the Korea Institute of Building Materials and Materials Evaluation Evaluation Center 1465-4, Seocho 3-dong, Seocho-gu, Seoul.

The test method was KICM-FIR-1002, and the strains used for the test were Escherchia coli ATCC 25922 as Escherichia coli and Staphylococcus aureus ATCC 6538 as Pseudomonas aeruginosa, and the test results are shown in Table 2 below.

Test Items Sample classification Initial concentration (CFU / 40p) Concentration after 24 hours (CFU / 40p) Bacterial Reduction (%) Antibacterial test by E. coli Blank 282 738 - Toilet soap 282 4 98.6 Antibacterial test by P. aeruginosa Blank 246 390 - Toilet soap 246 One 99.6 * Blank: Measured without sample. * CFU: Colony Forming unit * 40p = 0.04ml * The number of bacteria on the medium is calculated by multiplying the dilution factor.

As shown in Table 2, 98.9% of the initial concentrations of E. coli were reduced for E. coli, which is expected to have a significant level of E. coli reduction. . Therefore, the cosmetic soap prepared with the soap composition according to the present invention is excellent in antimicrobial effect, it means that can be used to replace the soap having a disinfection and antibacterial effect currently used in hospitals and clinics.

 In addition, as shown in Table 2, 99.6% of bacteria of the initial concentration was reduced after 24 hours for Pseudomonas aeruginosa, which is effective at the time of skin infection caused by Pseudomonas aeruginosa. Means you can use it.

As described above, according to the present invention, it is possible to prepare aluminum hydroxide having a particle diameter of 5 to 200 nm, and cosmetics made of the cosmetic composition containing such aluminum hydroxide may have a skin neutralizing function, anion and far infrared ray releasing effect, antifungal function, It has an antibacterial function, which is effective for protecting skin and improving skin troubles.

In addition, it contains ultra-fine aluminum hydroxide of 5 to 200nm to increase the skin contact area and skin adhesion, so that the effect as described above can be quickly exerted deep into the skin.

1 is a scanning electron microscope (Scanning Electron Microscopy) photograph of aluminum hydroxide prepared according to an embodiment of the present invention.

Claims (4)

Adding an acid in an aqueous solution of aluminum, an aluminum alloy or an aluminum compound to produce an aluminum ion solution of Al ⁺³ ; And A method for producing aluminum hydroxide having a particle size of 5 to 200 nm, comprising the step of precipitating aluminum hydroxide of Al (OH) ₃ by adding an alkali solution of (OH) ⁻ to the aluminum ion solution. Adding an acid in an aqueous solution of aluminum, an aluminum alloy or an aluminum compound to produce an aluminum ion solution of Al ⁺³ ; And A cosmetic composition comprising aluminum hydroxide having a particle diameter of 5 to 200 nm prepared by adding an alkali solution of (OH) ⁻ to the aluminum ion solution to precipitate aluminum hydroxide of Al (OH) ₃ . delete The cosmetic composition according to claim 2, wherein the content of aluminum hydroxide is 0.2 to 70% by weight.