KR102655036B1 - Manufacturing method of hybrid titanium dioxide pigment for cosmetic composition with improved white turbidity and sunscreen effect - Google Patents

Abstract

The present invention relates to a method for producing a hybrid titanium dioxide pigment for cosmetic compositions with improved white turbidity and UV blocking effects. More specifically, to synthesize hybrid titanium dioxide with improved white turbidity and UV blocking effects, conventionally available nano-sized silica is used. After dispersing purified water using a stirrer for more than 30 minutes, prepare nano-sized titanium dioxide dispersion (primary non-nano titanium dioxide), prepare coagulant and sodium hydroxide (NaOH) aqueous solution, and nano-sized silica After adding the primary non-nano titanium dioxide dispersion to the dispersed reactor, a coagulant and an aqueous solution of sodium hydroxide (NaOH) are added in a fixed amount while maintaining the pH and temperature to induce a reaction, resulting in a cosmetic composition with improved white turbidity and UV protection effect. It relates to a method for producing hybrid titanium dioxide pigments.

Description

Manufacturing method of hybrid titanium dioxide pigment for cosmetic composition with improved white turbidity and sunscreen effect}

The present invention relates to a method for producing a hybrid titanium dioxide pigment for cosmetic compositions with improved white turbidity and UV blocking effects. More specifically, to synthesize hybrid titanium dioxide with improved white turbidity and UV blocking effects, conventionally available nano-sized silica is used. After dispersing purified water using a stirrer for more than 30 minutes, prepare nano-sized titanium dioxide dispersion (primary non-nano titanium dioxide), prepare coagulant and sodium hydroxide (NaOH) aqueous solution, and nano-sized silica After adding the primary non-nano titanium dioxide dispersion to the dispersed reactor, a coagulant and an aqueous solution of sodium hydroxide (NaOH) are added in a fixed amount while maintaining the pH and temperature to induce a reaction, resulting in a cosmetic composition with improved white turbidity and UV protection effect. It relates to a method for producing hybrid titanium dioxide pigments.

Recently, due to customer demand, the development of new cosmetic materials and products with high spreadability and transparency during indoor and outdoor activities is expanding.

Among cosmetic raw materials, titanium dioxide has the advantage of excellent hiding power among existing white pigments.

However, such titanium dioxide has the following limitations.

First of all, there is a white turbidity (shielding power) phenomenon.

This phenomenon is a phenomenon in which the skin becomes unnaturally white due to sunscreen, etc., and is based on the scattering of visible light at the interface due to the difference in refractive index at the interface between the white pigment used as a sunscreen and cosmetic ingredients such as glycerin.

In order to suppress this phenomenon, the dispersibility of the sunscreen is increased, and the lower the interfacial density, the lower the cloudiness becomes possible.

Another limitation of titanium dioxide is transparency.

The shielding power of titanium dioxide is the best among pigments, but in actual product use, the application is rough and a lifting phenomenon occurs, resulting in a greater sense of difference with the skin. Therefore, in order to express natural skin shielding power, the transparency of the pigment itself must be secured to a certain degree. It can be used in a variety of ways as a material.

Lastly, titanium dioxide has a smaller particle size than other pigments, so the adhesion between particles is strong.

Therefore, in order to create a good dispersion state when put into a cosmetic formulation or applied to the skin, it is inevitable to pre-treat the existing silicone coating with crushing using Hensel, an atomizer, a three-stage roll, etc.

In addition, in order to function as a cosmetic, it must be easy to spread, and when the dispersibility is high, the spreadability is good. Excellent dispersion stability in ester oil or silicone oil, which is the main cosmetic ingredient, is required, so surface modification of the sunscreen raw material or the use of a dispersant is necessary. It has limitations.

Lastly, titanium dioxide has a hydrophilic surface, and makeup products containing a large amount of hydrophilic substances have the limitation of requiring water-repellent surface treatment for makeup sustainability because makeup is disturbed by moisture such as sweat, tears, and rain.

As a technology to solve the problems arising from titanium dioxide as described above, “Cosmetic and dermatological preparations containing transparent surface-coated titanium dioxide particles” (Korean Patent Publication No. 10-2007-0110532, Patent Document 1) A structure in which the surface has been modified with silicon dioxide (SiO ₂ ) has been disclosed.

However, despite the surface modification as in Patent Document 1, there is a problem of insufficient dispersibility and skin compatibility.

In addition, in "Cosmetic raw materials with improved usability, manufacturing method thereof, and cosmetics using the same" (Korea, Registered Patent Publication No. 10-0602731, Patent Document 2), titanium dioxide was coated on the surface of the polymer beads to improve the feel of use. However, there is a limitation in that the raw material itself contains high molecular weight polymers.

Therefore, for the purpose of imparting properties such as water repellency, hydrophilicity, and skin friendliness, the suitability for cosmetic application can be improved by surface coating and modifying the manufactured material. At the same time, nano titanium dioxide particles of different sizes are added to the nano titanium dioxide suspension. The proposal was made to provide a material for sun formulations that improves the UV blocking effect by coating and improves the shortcomings of titanium dioxide.

KR 10-2007-0110532 (2007.11.19) KR 10-0602731 (2006.07.11)

The present invention is to solve the problems arising from the above-described prior art. The purpose of the present invention is to synthesize hybrid titanium dioxide with improved white turbidity and UV blocking effects by stirring conventionally available nano-sized silica for more than 30 minutes. After dispersing the purified water using a nano-sized titanium dioxide dispersion (primary non-nano titanium dioxide), prepare a coagulant and an aqueous sodium hydroxide (NaOH) solution, and pour it into the reactor in which the nano-sized silica is dispersed. After adding the non-nano titanium dioxide dispersion, a coagulant and sodium hydroxide (NaOH) aqueous solution are added in a fixed amount while maintaining the pH and temperature to induce a reaction, resulting in a hybrid titanium dioxide pigment for cosmetic compositions with improved white turbidity and ultraviolet ray blocking effects. To provide a manufacturing method.

The method for producing a hybrid titanium dioxide pigment for cosmetic compositions with improved white turbidity and ultraviolet ray blocking effect according to the present invention,

The first step of dispersing non-nano titanium dioxide (S100); and

A second step (S200) to add nano-sized silica to purified water and stir at a temperature of 20 to 35°C to react.

After preparing the primary non-nano titanium dioxide dispersion, coagulant, and sodium hydroxide (NaOH) 4.12% aqueous solution dispersed in the first step, the primary non-nano size dispersion was added to the stirrer in which the nano-sized silica was dispersed in the second step. After adding a fixed amount of titanium dioxide dispersion and stirring for more than 1 hour, adjust the pH to 5.0 ~ 8.0 with a 10% aqueous solution of hydrochloric acid (HCl), and induce a reaction by steadily adding a coagulant and an aqueous sodium hydroxide (NaOH) solution using a fixed amount adder. The third step (S300) to

After the third step, a fourth step (S400) to obtain non-nano hybrid titanium dioxide powder by dehydration and filtration;

A fifth step (S500) to obtain non-nano hybrid titanium dioxide powder with improved white turbidity and UV protection effect by drying the non-nano hybrid titanium dioxide powder and confirming that the moisture content is 2.0% or less, and then pulverizing it;

By including a fifth step (S600) of coating the surface of the non-nano hybrid titanium dioxide powder with either Triethoxycaprylyl Silane or Lauoryl Lysine, the problem of the present invention is solved.

In general, titanium dioxide sunscreen has excellent hiding power, but its dispersibility is low due to its fine particles, and it scatters even ultraviolet and visible rays, reducing the UV blocking effect by half and causing a white clouding phenomenon.

Therefore, when applied to cosmetics, the spreadability is rough and the lifting phenomenon occurs, so the content increases and the efficiency of the formulation decreases when various types of titanium dioxide are used in combination.

Fundamentally, the present invention uses titanium dioxide for the skin shielding power of existing base makeup, but can provide core technologies such as surface modification and functional increase such as transparency through hybrid technology that improves the disadvantages of poor use and clarity. There will be.

Figure 1 is a schematic diagram showing a method for manufacturing a hybrid titanium dioxide pigment for a cosmetic composition with improved white turbidity and ultraviolet ray blocking effects according to an embodiment of the present invention.
Figure 2 is a graph of the SPF/PA analysis results in the Example.
Figure 3 is an official test report for transmittance of the present invention, Figure 4 is an official test report for particle size analysis, and Figure 5 is an official test report for hiding power.
Figure 6 is an image of the SEM analysis results of the example.
Figure 7 is a schematic diagram showing the manufacturing process of surface coating and modified titanium dioxide according to this embodiment of the present invention.
Figure 8 is a comparison image of the aqueous solution dispersion state before and after surface treatment, and Figure 9 is a contact angle official test report before and after surface treatment.

The present invention's method for producing a hybrid titanium dioxide pigment for cosmetic compositions with improved white turbidity and ultraviolet ray blocking effects,

The first step of dispersing non-nano titanium dioxide (S100); and

A second step (S200) to add nano-sized silica to purified water and stir at a temperature of 20 to 35°C to react.

After preparing the primary non-nano titanium dioxide dispersion, coagulant, and sodium hydroxide (NaOH) 4.12% aqueous solution dispersed in the first step, the primary non-nano size dispersion was added to the stirrer in which the nano-sized silica was dispersed in the second step. After adding a fixed amount of titanium dioxide dispersion and stirring for more than 1 hour, adjust the pH to 5.0 ~ 8.0 with a 10% aqueous solution of hydrochloric acid (HCl), and induce a reaction by steadily adding a coagulant and an aqueous sodium hydroxide (NaOH) solution using a fixed amount adder. The third step (S300) to

After the third step, a fourth step (S400) to obtain non-nano hybrid titanium dioxide powder by dehydration and filtration;

A fifth step (S500) to obtain non-nano hybrid titanium dioxide powder with improved white turbidity and UV protection effect by drying the non-nano hybrid titanium dioxide powder and confirming that the moisture content is 2.0% or less, and then pulverizing it;

A fifth step (S600) of coating the surface of the non-nano hybrid titanium dioxide powder with either Triethoxycaprylyl Silane or Lauoryl Lysine.

At this time, the first step is,

After preparing nano titanium dioxide dispersion, coagulant, and 4.12% sodium hydroxide (NaOH) aqueous solution, add a fixed amount of nano-sized titanium dioxide dispersion to a stirrer in which nano-sized titanium dioxide is dispersed, stir for more than 1 hour, and add hydrochloric acid (HCl). Step 1-1 to adjust pH to 5.0 ~ 8.0 with 10% aqueous solution; and

It is characterized in that it includes steps 1 and 2 for inducing a reaction by steadily adding a coagulant and an aqueous sodium hydroxide (NaOH) solution using a fixed-quantity injector.

In the present invention, the coating process for titanium dioxide is [(1st Non-nano TiO ₂ : nano titanium dioxide dispersion → nano titanium dioxide wet coating) → nano size SiO ₂ dispersion → 1st non-nano TiO ₂ coating → In the order of dehydration → drying → dispersion, the first step is to uniformly disperse nano-sized SiO ₂ in a solvent, and the second step is to change the reaction pH, temperature, coating agent, and type of nano titanium dioxide to establish coating control and process. The reaction formula is as follows.

nano TiO ₂ + nano TiO ₂ → Non-nano TiO ₂ + Nano SiO ₂ + Flocculant

--> Non-Nano Hybrid TiO ₂

Hereinafter, the present invention will be described in more detail through examples. However, these examples are only exemplary descriptions of the present invention, and the scope of the present invention is not limited to these examples.

As shown in Figure 1, the method for producing a hybrid titanium dioxide pigment for a cosmetic composition with improved white turbidity and ultraviolet ray blocking effect according to an embodiment of the present invention,

The first step of dispersing non-nano titanium dioxide (S100); and

A second step (S200) to add nano-sized silica to purified water and stir at a temperature of 20 to 35°C to react.

After preparing the primary non-nano titanium dioxide dispersion, coagulant, and sodium hydroxide (NaOH) 4.12% aqueous solution dispersed in the first step, the primary non-nano size dispersion was added to the stirrer in which the nano-sized silica was dispersed in the second step. After adding a fixed amount of titanium dioxide dispersion and stirring for more than 1 hour, adjust the pH to 5.0 ~ 8.0 with a 10% aqueous solution of hydrochloric acid (HCl), and induce a reaction by steadily adding a coagulant and an aqueous sodium hydroxide (NaOH) solution using a fixed amount adder. The third step (S300) to

After the third step, a fourth step (S400) to obtain non-nano hybrid titanium dioxide powder by dehydration and filtration;

A fifth step (S500) to obtain non-nano hybrid titanium dioxide powder with improved white turbidity and UV protection effect by drying the non-nano hybrid titanium dioxide powder and confirming that the moisture content is 2.0% or less, and then pulverizing it;

A fifth step (S600) of coating the surface of the non-nano hybrid titanium dioxide powder with either Triethoxycaprylyl Silane or Lauoryl Lysine.

At this time, the first step is,

After preparing nano titanium dioxide dispersion, coagulant, and 4.12% sodium hydroxide (NaOH) aqueous solution, add a fixed amount of nano-sized titanium dioxide dispersion to a stirrer in which nano-sized titanium dioxide is dispersed, stir for more than 1 hour, and add hydrochloric acid (HCl). Step 1-1 to adjust pH to 5.0 ~ 8.0 with 10% aqueous solution; and

It is characterized in that it includes steps 1 and 2 for inducing a reaction by steadily adding a coagulant and an aqueous sodium hydroxide (NaOH) solution using a fixed-quantity injector.

<Example> Non-nano hybrid titanium dioxide production

First, prepare a 4.12% aqueous solution of nano-sized titanium dioxide, coagulant, and sodium hydroxide (NaOH), add a fixed amount of nano-sized titanium dioxide dispersion to a beaker containing nano-sized titanium dioxide, stir for more than 1 hour, and add hydrochloric acid (HCl). ) The pH is adjusted to 5.0 ~ 8.0 with a 10% aqueous solution.

Afterwards, a coagulant and an aqueous solution of sodium hydroxide (NaOH) were added at a constant rate using a fixed-quantity dispenser to induce a reaction. The first non-nano titanium dioxide dispersion is prepared.

Afterwards, a certain amount of nano-sized silica is added to a beaker containing purified water, stirred, and allowed to react while maintaining a temperature of 20 to 25°C.

Afterwards, the first non-nano titanium dioxide dispersion, coagulant, and 4.12% sodium hydroxide (NaOH) aqueous solution are prepared.

Afterwards, a fixed amount of the primary non-nano sized titanium dioxide dispersion is added to the beaker in which the nano sized silica is dispersed, stirred for more than 1 hour, and then adjusted to pH 5.0 to 8.0 with a 10% aqueous hydrochloric acid (HCl) solution.

Afterwards, a coagulant and an aqueous solution of sodium hydroxide (NaOH) are added at a constant rate using a fixed-quantity feeder to induce a reaction.

Afterwards, after completion of the reaction, non-nano hybrid titanium dioxide powder is obtained by dehydration and filtration.

Afterwards, the obtained non-nano hybrid titanium dioxide powder is dried, the moisture content is confirmed to be less than 2.0%, and then pulverized to obtain the final material of non-nano hybrid titanium dioxide with improved white turbidity and UV protection effects.

Afterwards, each material is obtained by experimenting by changing the content of the primary non-nano titanium dioxide to be coated to 20 and 50% and adjusting the size of the base silica particles.

Table 1 above shows experimental parameters for the production of non-nano hybrid titanium dioxide with improved UV blocking effect.

In order to synthesize non-nano hybrid titanium dioxide with improved UV protection effect, experiments were conducted by adjusting each experimental variable as shown in Table 1 above, and the optimal conditions were selected as a result of evaluation.

First, in the case of pH, at a low pH of 5.5 to 7.0, nano-sized titanium dioxide particles formed were not coated on the surface of pigment-grade titanium dioxide, so a large amount of fine particles less than 1㎛ were analyzed.

As a result, it was unable to overcome the limitations of clumping, white cloudiness, and stiff touch, which are characteristics of pigment-grade titanium dioxide. At pH 7.5 or higher, the particle size of the coated titanium dioxide grew, improving the clumping phenomenon and significantly improving the ultraviolet ray blocking effect.

If the reaction temperature is high under the same pH conditions, the coating phenomenon between the synthesized non-nano sized titanium dioxide particles and nano sized silica occurs significantly, causing problems as the UV blocking effect is insufficient.

At this time, if the flocculant content is less than 10%, the coating of non-nano sized titanium dioxide is not quantified and the uncoated particles are dispersed, and in the case of 20%, the nano sized titanium dioxide is excessively coated and non-nano sized titanium dioxide is coated. It was confirmed that a large titanium dioxide coating was formed, which resulted in stiff application and a white cloudiness.

In order to evaluate the product properties that change depending on the content under optimal conditions, two types of products with 20% and 50% coating content were manufactured at pH 7.5 and a temperature of 25℃, and it was found that the UV blocking effect was improved at 50% coating content. Confirmed.

In order to evaluate product properties that change depending on the particle size of nano-sized silica under optimal conditions, six types of products with 20% and 50% coating content were manufactured at pH 7.5 and a temperature of 25°C, and their properties were evaluated.

After completion of the reaction, non-nano hybrid titanium dioxide particles were manufactured through a grinding process. The raw material was coated with 20 and 50% non-nano titanium dioxide, respectively. The results were HS050-N1100(20), (50), and PS05. -N1100(20),(50), PS1K-N1100(20),(50).

At this time, Example 1 was manufactured under TiO ₂ -nano Ti 20 conditions, Example 2 was manufactured under TiO 2 -nano Ti 40 conditions, and Example 3 was manufactured under TiO ₂ -nano Ti 50 conditions.

<Experimental Example 1> Evaluation of properties of titanium dioxide

a) Ultraviolet rays (SPF, PA) measurement method: In-vitro UV protection test method is a method that mechanically simulates the human body application test method. Instead of human skin, a certain amount of sunscreen is applied to a test plate (PMMA plate) with a certain degree of roughness. The degree of blocking of the sunscreen is evaluated by numerically comparing the amount of transmitted light (absorbed amount) of ultraviolet rays with a test plate (PMMA plate) applied and not applied with sunscreen.

B) The total transmittance measurement method (KS M ISO 16468-1) measures the transmittance using a Haze meter to confirm the transparency of the developed product.

c) The particle size analysis method (ISO 13320) uses distilled water as a dispersion solvent when water dispersion is possible, and when water dispersion is not possible, ethanol is used as a dispersion solvent.

The uniformity of the developed product is measured by measuring the particle size distribution using a particle size analyzer.

D) The concealment rate evaluation was changed from ISO 2814 to ASTM E1164.

After applying the developed product to black/white hiding paper, the lightness (L*) is measured and evaluated using a colorimeter.

Experimental results of non-nano hybrid titanium dioxide

A) UV protection results

It was confirmed that when the content of primary non-nano hybrid titanium dioxide was 20%, there was no difference from existing sunscreens and there was no improvement in UV blocking effect.

In addition, when the content of primary non-nano hybrid titanium dioxide was 50%, it was confirmed that SPF was improved by 22.48% and PS by 21.74% in the material of PS05-N1100 (50).

As a measurement method, the in-vitro UV protection test is a method that mechanically simulates the human body application test method. Instead of human skin, a certain amount of sunscreen is applied to a test plate (PMMA plate) with a certain degree of roughness and the sunscreen is applied. The degree of blocking of the UV blocker is evaluated by numerically comparing the amount of transmitted light (absorbance) of ultraviolet rays with an untreated test plate (PMMA plate).

Table 2 shows the non-nano hybrid titanium dioxide SPF/PA values (in vitro), and Figure 2 is a graph of the SPF/PA analysis results.

B) Transmittance result

In order to preemptively check and evaluate the degree of improvement in the transmittance of the sample, the transmittance was measured using a Haze meter.

As a result of the evaluation, the transmittance of nano-sized SiO ₂ used as a raw material was confirmed to be high as the amount of light transmitted increases as the size of the particle increases, and the coating content can be increased to 20% and 50%. As the amount of light transmitted decreases, it was confirmed that the total transmittance (TT) was low.

The reason is that the smaller the size of SiO ₂ , the larger the specific surface area, resulting in more light scattering, and due to the good hiding power of nano-sized titanium dioxide, the total transmittance (TT) decreased as the content increased.

It was confirmed that the transparency of the product using the manufacturing method of the present invention reached the target value in terms of total transmittance (T.T) compared to the titanium dioxide of existing sunscreens.

Table 3 shows the transmittance results, and Figure 3 shows the certified transmittance test report.

c) Particle size analysis results

As a result of the evaluation, the size of the coated particles is larger than the nano-sized silica used as a raw material, and there is no difference depending on the content of non-nano TiO ₂ coated, and there is a difference depending on the size of the nano-sized silica in the core HS050-N1100 Although there is a large difference in (20) and (50), the results were obtained within the 3rd year target value of 1 to 30㎛.

Table 4 shows the particle size analysis results, and Figure 4 shows the particle size analysis certified test report.

D) Concealment rate evaluation results

In order to confirm and evaluate the level of concealment rate control, a preemptive evaluation was conducted using a colorimeter.

As a result of the evaluation, since it was a white product, there was no significant difference in the brightness measurement value of the concealment rate paper on the white background, but the result value (=concealment rate) was derived from the difference in the brightness measurement value of the black concealment rate paper.

The hiding rate decreased when compared to Non-nano Hybrid titanium dioxide and existing titanium dioxide.

It is believed that the hiding power has been improved due to the influence of nano-sized silica.

In addition, the content of primary non-nano titanium dioxide appears to have a higher hiding power of 50% than 20%, which is believed to be the difference in the content of primary non-nano titanium dioxide, which has hiding power.

Table 5 shows the results of the concealment rate evaluation, and Figure 5 shows the concealment rate official test report.

<Experimental Example 2> SEM image measurement experiment

SEM analysis was performed to confirm the coating shape of the example.

As shown in Figure 6, in the case of 20% coating, it was confirmed that there were many empty spaces of nano-sized silica, which helped improve hiding power, but did not significantly affect the increase in ultraviolet ray blocking rate.

It was found that in the case of 50% coating, the empty space of nono-sized silica was reduced and the amount of primary non-nano titanium dioxide was increased, improving the ultraviolet ray blocking effect.

Meanwhile, in order to produce surface coating and modified titanium dioxide, a titanium dioxide pigment with a hydrophilic surface and silicon with a Si-H bond are replaced with Si-O-Si or Si-O-M (pigment) to form a thin film made of silicon. forming, and as a result, providing the effect of increasing lubrication and skin adhesion and providing water repellency.

Specifically, surface modification or surface coating is performed on the non-nano hybrid titanium dioxide manufactured according to one example to provide a surface component suitable for makeup formulation.

The water-repellent coating principle consists of the following order: pigment dispersion → coating material input → pigment and coating material surface substitution → coating film formation → dehydration/drying → dispersion.

At this time, as shown in Figure 7, in order to expand the application range of the developed raw materials, silicone oil with lipophilic properties and amino acids (Lauroyl Lysine) with excellent skin compatibility were applied to the surface of the non-nano hybrid titanium dioxide 50% sample. was coated, and the main properties were compared and evaluated before surface treatment.

<Experimental Example 3> Water repellency measurement experiment

Looking at the water repellency evaluation photos comparing particles prepared in distilled water, it was confirmed that the particles coated with silane compound (TE) and lauroyl lysine (LL) do not mix at all with water, which is a solvent.

Through this, it was confirmed that silicone oil was evenly coated on the particle surface.

Through these experimental results, surface-modified non-nano hybrid titanium dioxide provides water repellency and serves as a cosmetic material that prevents the sustainability of makeup from being reduced by external environmental factors such as sweat or moisture. It was confirmed that it was granted.

Table 6 shows the non-nano hybrid titanium dioxide contact angle results, Figure 8 is a comparison diagram of the aqueous solution dispersion state before and after surface treatment, and Figure 9 is a contact angle official test report before and after surface treatment.

According to the present invention, in order to synthesize hybrid titanium dioxide with improved white turbidity and UV blocking effects, conventionally available nano-sized silica was dispersed in purified water using a stirrer for more than 30 minutes, and then mixed with a nano-sized titanium dioxide dispersion (1). Prepare primary non-nano titanium dioxide), prepare coagulant and sodium hydroxide (NaOH) aqueous solution, and add primary non-nano titanium dioxide dispersion to the reactor in which nano-sized silica is dispersed, then maintain pH and temperature. By inducing a reaction by adding a fixed amount of a coagulant and an aqueous solution of sodium hydroxide (NaOH), it is possible to provide a non-nano hybrid titanium dioxide pigment with improved white turbidity and ultraviolet ray blocking effects.

From the above description, a person skilled in the art to which this application belongs will be able to understand that this application can be implemented in other specific forms without changing its technical idea or essential features. In this regard, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of the present application should be construed as including the meaning and scope of the claims described below rather than the detailed description above, and all changes or modified forms derived from the equivalent concept thereof are included in the scope of the present application.

Claims (2)

In the method for producing a hybrid titanium dioxide pigment for cosmetic compositions with improved white turbidity and UV protection effects,
The first step (S100) of dispersing non-nano meter-sized titanium dioxide; and
A second step (S200) for adding nanometer-sized silica to purified water and reacting it by stirring at a temperature of 20 to 35°C;
After preparing the first non-nano meter-sized titanium dioxide dispersion and coagulant and a 4.12% sodium hydroxide (NaOH) aqueous solution dispersed in the first step, nanometer-sized silica is dispersed in the second step. Inject a fixed amount of primary non-nano meter-sized titanium dioxide dispersion into the stirrer, stir for more than 1 hour, adjust pH to 5.0 ~ 8.0 with 10% aqueous hydrochloric acid (HCl), and add coagulant and hydroxide using a fixed amount adder. A third step (S300) to induce a reaction by regularly adding sodium (NaOH) aqueous solution;
After the third step, a fourth step (S400) to obtain non-nano meter-sized hybrid titanium dioxide powder by dehydration and filtration;
The non-nano meter-sized hybrid titanium dioxide powder was dried to confirm that the moisture content was 2.0% or less, and then pulverized to produce a non-nano meter-sized hybrid titanium dioxide powder with improved white turbidity and UV protection effects. Step 5 (S500) to obtain; and
A fifth step (S600) of coating the surface of the non-nano meter-sized hybrid titanium dioxide powder with either Triethoxycaprylyl Silane or Lauoryl Lysine (S600). A cosmetic product with improved white cast and ultraviolet ray blocking effects. Method for producing hybrid titanium dioxide pigment for composition.
According to clause 1,
The first step is,
After preparing a nanometer-sized titanium dioxide dispersion, a coagulant, and a 4.12% aqueous solution of sodium hydroxide (NaOH), a quantitative amount of the nanometer-sized titanium dioxide dispersion was added to the stirrer in which the nanometer-sized titanium dioxide was dispersed and stirred for more than 1 hour. Step 1-1 to adjust the pH to 5.0 ~ 8.0 with a 10% aqueous solution of hydrochloric acid (HCl); and
Hybrid titanium dioxide pigment for cosmetic compositions with improved white turbidity and ultraviolet ray blocking effects, comprising steps 1 and 2 for inducing a reaction by consistently adding a coagulant and an aqueous solution of sodium hydroxide (NaOH) using a quantitative injector. Manufacturing method.