KR20110099813A

KR20110099813A - Surface modificaion of sericite and titanium dioxide

Info

Publication number: KR20110099813A
Application number: KR1020100018746A
Authority: KR
Inventors: 박현종
Original assignee: 박현종
Priority date: 2010-03-03
Filing date: 2010-03-03
Publication date: 2011-09-09

Abstract

The present invention relates to the surface modification technology of the mica and titanium dioxide used as a cosmetic raw material to improve the UV blocking function of the cosmetic and to devise a method for producing a cosmetic in which far infrared radiation is emitted.
The method for surface modification of biotite and titanium dioxide according to the present invention is characterized by a method of manufacturing a surface treatment of dryly coating titanium dioxide on the particles of biotite using a horizontal rotational vibration of 2500 RPM and the physical pressure of the longitudinal axis. The composition of titanium is (i) the size ratio of the particle diameter of the mica and titanium dioxide is 10: 1, (ii) the particle size of the mica and titanium dioxide is 1-10 μm, the particle size of titanium dioxide is 0.1-1 μm, (iii) When the weight of mica is 1, the weight ratio of titanium dioxide is 0.8 ~ 1. Through this method, it blocks both UVB and UVA, and has the characteristic that far infrared rays are emitted from cosmetics.
The present invention improves and improves the sunscreen function of cosmetics, improves the feeling of use as a cosmetic, and also has an effect of helping skin health due to cosmetics in which far-infrared rays are radiated.

Description

Surface modificaion of Sericite and Titanium Dioxide

The present invention provides a method for dry surface modification of biotite {Sericite} which is a raw material of cosmetics and titanium dioxide which is a sunscreen active ingredient. It is about the composition.

Cicada is a generic term for dense or fine vinyl mica in minerals, also called sericite . It belongs to monoclinic system and has white or off-white pearl luster. Originally referred to as crystalline schist, chorionic schist, and today, hydrothermal clay-like fine muscovite.

The fine mica powder maintains its unique characteristics, ie, thin flakes, which can maintain far-infrared emission, moisture absorption, anion generation, antibacterial and deodorization, as well as soft texture and silkiness. It can be used as an extender of products and drugs, so the added value is maximized.

In the case of biotite used as a cosmetic raw material, it is used as a constituent and a coloring agent in cosmetics, and has the same group name of silicate mineral {Silicate mineral}, and has similar physical properties, but various chemical compositions.

Ultraviolet ( ultraviolet ) { ultraviolet } is the region adjacent to the violet band in the electromagnetic spectrum and invisible to the human eye has a wavelength range of 200 ~ 400nm. Although it has less permeability than normal X-rays or gamma rays, it has higher energy than visible light and thus affects human skin and small organisms. Electromagnetic waves that are sufficiently high in energy can destroy small microorganisms because they can destroy biological tissues, and thus ultraviolet rays are used as sterilizers in everyday life. In particular, when the skin is exposed to ultraviolet rays of UV light and damages the DNA, if severe, the DNA repair process is stopped, cell death (apotosis) occurs, and more seriously cause skin cancer. In order to minimize the damage caused by such DNA damage, it is essential to block the ultraviolet rays emitted from sunlight.

A sunscreen generally refers to cosmetics used to block ultraviolet rays, and sunscreens used in cosmetics can be classified into two types. They have chromophores that can absorb ultraviolet rays in their molecules, so they can absorb ultraviolet-B or ultraviolet-A organic sunscreens (eg, ethhexylmethoxycinnamate, butylmethoxydibenzoylmethane, etc.) and inorganic particles that scatter ultraviolet light. (Eg titanium oxide, zinc oxide, etc.)

Infrared radiation is a kind of electromagnetic waves with a greater thermal effect than the red region of visible light. Shorter wavelengths are called near infrared rays, and longer wavelengths are called far infrared rays . It is invisible, absorbed well by materials, and has strong resonance and resonance effects on organic compound molecules. Far infrared rays penetrate deep into the skin and produce heat. This heat action helps to eliminate the bacteria that cause various diseases, and helps to expand the capillaries and blood circulation and tissue formation. In addition, by touching the water and protein molecules that make up the cells, the cells are shaken finely 2,000 times per minute to activate cell tissue, which is effective in preventing various adult diseases such as aging, promoting metabolism, and chronic fatigue. In addition, it promotes sweating, pain relief, heavy metal removal, sleep, deodorization, antibacterial, and fungal growth is effective.

Titanium Dioxide { Titanium Dioxide } is widely used as a representative inorganic sunscreen, and is often used in makeup cosmetics because of its excellent hiding power and whiteness. The amount of titanium dioxide is limited because of the white color, and there is a sense that it is auxiliary to the ultraviolet absorbent. The reason for the whiteness of titanium dioxide is that it scatters visible light as well as ultraviolet rays because of its high refractive index.

Titanium dioxide is divided into rutile, anatase and brookite depending on the crystal form. The most stable energy is rutile, and the other two phases are converted to rutile type when heat treated at high temperature.

In general, anatase has high photoactivity, light resistance and very poor reactivity. Therefore, most of the sunscreens used are rutile type. In the case of rutile titanium dioxide, the handicapenergy required for the excited state absorbs ultraviolet rays of about 400 nm or less in terms of wavelength. Titanium dioxide grade has little harmful effects on human body to the extent that it is admitted as a food or medicine.

As such, there is an urgent need for a technology capable of overcoming the limitation of UV protection ability determined by the particle size of titanium dioxide, which is a sunscreen of cosmetics, and the cosmetic quality deterioration factor caused by the particle size through surface modification with the mica. In addition, in order to avoid the disadvantages of organic blockers that must be used to overcome the disadvantages of inorganic blockers, namely, in order to avoid the toxicity of cosmetics and the degeneration of organic matters, a treatment process technology capable of realizing ultraviolet rays blocking using only inorganic blockers titanium dioxide and mica. need.

The advantages and disadvantages of preparing titanium dioxide as a sunscreen cosmetic by classifying titanium dioxide into particle size are shown in Table 1 below.

Advantages and disadvantages of UV protection by particle size of titanium dioxide. size Advantages Disadvantages 0.20㎛ ~ or more Concealment is great.
Lubricity is good. UV protection effect is poor. 0.10 ~ 0.20㎛ UV-A blocking effect is big.
Concealment is adequate. UV-B blocking effect is small. 0.10㎛ ~ or less UV-B blocking effect is big.
Good transparency Makeup film is unnatural with blue-white color.

In the UV-B area, the smaller the primary particle diameter of titanium dioxide (around 0.02㎛), the greater the absorption capacity, and the larger the primary diameter (about 0.10 ~ 0.20㎛) in the UV-A area. It has a large scattering capacity. Combinations of small and slightly larger particles are expected to protect against UV radiation in both regions, but using these inevitably decreases the transparency of the formulation. In addition, when the particle diameter is small and the specific surface texture is large, the dispersibility is not good because it has a strong cohesive force, and because it is easy to scatter blue light in visible light, it may appear blue in cosmetic applications, which may be unnatural when applying the skin. Therefore, it is necessary to develop a technology for reducing whiteness when using sunscreen cosmetics, and a manufacturing method.

In order to provide far-infrared radiation from cosmetics to help skin health, it is necessary to make the mineral with the best far-infrared emissivity.

In order to solve the problem, a composite technology of adsorbing or coating titanium dioxide, which is an inorganic ultraviolet scattering agent, on the surface of the inorganic powdered mica is realized.

Figure 1 shows the necessary equipment in the process for realizing a method for modifying the surface of titanium dioxide and chorionic mica according to the present invention. The ratio of particle size to be surface modified is about 10 to 1, and the diameter of the mica to be surface modified is about 1 μm and the particle diameter of titanium dioxide is about 0.05 μm to 0.1 μm. Adsorption and coating of 1/10 titanium dioxide particles on the mica having a diameter of 10 times larger particle size. It adopts dry method without using wet or planetary mill, so it is used as raw material for cosmetics without post-treatment. This made it possible.

The mica and titanium dioxide are mixed at 1: 1w% to vibrate the horizontal axis using 2500RPM motor vibrating body to apply physical pressure to the particle by longitudinal axis using low tension compression spring. The vibration force has a rotational force, and the mixed particles rotate and mix evenly, causing collisions between the particles. At this time, titanium dioxide having cohesive force is attached to the particles of biotite having a plate-like structure and excellent adsorption ability.

When this is performed for about 60 to 75 minutes, the adhesion ratio between the two particles is maximized. The adhesion capacity of titanium dioxide is about 33% and the titanium dioxide in individual state is about 67%. This overcomes the limitations of the ability to block ultraviolet rays and the use of cosmetics by particle size. That is, the blue color in the particles having small titanium dioxide is reduced by the characteristics of the color of the biotite, and the ultraviolet scattering ability of each particle size is complemented by the particle size of the biotite. This has resulted in a technology that enhances the ability to block UV rays and improves the feel of cosmetics.

In addition, due to the far-infrared radiation ability of the biotite, heat and light energy absorbed from the outside of the cosmetic is re-emitted into the far infrared and directly irradiated to the skin, thereby activating skin cell tissues to prevent aging, promote metabolism, promote blood circulation, prevent bacteria, It is effective in preventing mold growth.

The surface-modified cosmetic raw material obtained by the present invention can be replaced with an ultraviolet organic absorbent, and it can be safely used by skin patients who have had difficulty using UV-block color cosmetics due to the toxicity of organic matter.

By removing the whitening phenomenon, which is a disadvantage of titanium dioxide, which is a sunscreen agent, it is possible to maximize the feeling and color as a color cosmetic.

In addition, the surface modification of biotite and titanium dioxide improves the sunscreen function, which doubles the ability to protect the skin from harmful ultraviolet rays.

It is a cosmetic composition using Cicada, which is the largest far-infrared radiator, which is directly irradiated with far infrared rays on the skin to help skin health.

The oscillation of 2500 RPM on the villus and titanium dioxide of d) was carried out so that 1/10 of titanium dioxide of the mother particle adhered to the surface of the villus having a large particle size. a) Uses a low tension spring to make the villus and titanium dioxide adhere closely. b) A buffer spring improves the width and efficiency of vibration. Horizontal vibration is generated using the vibration motor of c).

In order to implement the present invention, the invention was embodied by performing the following test analysis using problem solving means.

Test Example 1: Titanium Dioxide and Chorus Surface modification effect

This test was carried out to evaluate the function and performance of raw materials with surface modifications of titanium dioxide and biotite. The sunscreen index was measured by SPF (in vitro), and the feeling of use was assessed by six women panelists measuring 1 to 10 points on 5 items of feeling and calculating the average value. As shown in Table 2, the UV protection effect was improved from 25 to 32, and the sensitivity was increased from 4.67 to 6.77, compared to the raw material in which the biotite and titanium dioxide surface-modifying raw materials were simply mixed using the solution method.

Performance Comparison of Simple Mixing of Cicada and Titanium Dioxide and Surface Modification Methods Sample SPF Feeling S1 (Simple Mix) 25 4.67 S2 (Surface Modification of Solutions) 32 6.77

Test Example 2: Chorus Functional evaluation of cosmetics according to formulation

In this test, titanium dioxide was quantitatively determined, and the amount of mica was increased by a certain amount, and thus the UV blocking ability, far-infrared radiation rate, and usability were measured. As shown in the results of Table 3, the UV protection function was quantitatively improved and the far-infrared emissivity increased with every 5% increase in the mica. You can see that the feeling also increases. As a result, as the formulation of Cicada increases, the function of cosmetics is improved, but when the amount of Cicada increases than the ratio of titanium dioxide, problems arise in shape as cosmetics, and the optimal composition is the best with 1: 1% composition. .

Comparison of Function According to Cicada Mixture Ratio Sample SPF Far infrared radiation rate Feeling S1 20 86.3 4.27 S2 29 88.2 4.30 S3 19 88.4 5.93 S4 35 88.6 6.20 note)

S1: Cicadas blended 0%, TiO ₂ blended 15%
S2: Cicadas blended 5%, TiO ₂ blended 15%
S3: Cicadas blended 10%, TiO ₂ blended 15%
S4: Cicadas blended 15%, TiO ₂ blended 15%

a) low tension spring
b) cushioning spring
c) vibration motor
d) biotite, titanium dioxide

Claims

In the surface modification method of biotite and titanium dioxide used as a cosmetic raw material,
A method of manufacturing a surface treatment by dry coating titanium dioxide on the particles of the mica using a 2500 RPM transverse oscillator and the physical pressure of the longitudinal axis.

The method according to claim 1, wherein the method for treating sorghum and titanium dioxide
(i) The ratio of the size of the particle diameter of the biotite to titanium dioxide is 10: 1,
(ii) the particle size of the biotite and titanium dioxide is 1 ~ 10㎛, the particle size of titanium dioxide is 0.05 ~ 1㎛,
(iii) The composition ratio of the cosmetic raw material which consists of 0.8-1 of the weight ratio of titanium dioxide when the weight of a mica is 1, and its manufacturing method.

The method according to claim 2, wherein the ultraviolet rays and the ultraviolet rays are blocked by the surface modification of the biotite and titanium dioxide.

The cosmetic preparation method according to claim 1 or 2, wherein the ultraviolet ray blocking function is improved and far-infrared rays are emitted from cosmetics due to the surface modification of the biotite and titanium dioxide.