KR101681107B1 - Colored pearlecent pigments, preparation method therof, and cosmetic composition containing the same as a active ingredient - Google Patents

Abstract

The invention colored pearlescent relates to pigments, and more particularly simple pearl gloss of the pigment on the surface after the ferric oxide treated surface, a part of ferric oxide (Fe ₂ O ₃₎ by using a reducing and firing techniques Ferrer Spanish metallic oxide (Fe ₃ O ₄ ), and having an appearance color of red, purple, blue and green by an optical color effect, a process for producing the same, and a cosmetic composition containing the same as an active ingredient. The colored pearlescent pigment according to the present invention can exhibit color and gloss similar to those of red, purple, blue and green pearlescent pigments obtained by surface treatment of common carmine, ferrocyan blue and the like, It is possible to overcome the problems such as change in color development caused by pH conditions and interaction of raw materials, blurring phenomenon (bleeding) or blurring in formulation, and it can be usefully used instead of existing pearlescent pigments. Also, since it is constituted only by a stable inorganic material, natural or synthetic chemical pigments can be excluded, and a prescription composition free from various regulations will be possible.

Description

TECHNICAL FIELD The present invention relates to a colored pearlescent pigment, a colored pearlescent pigment, a method for producing the same, a method for producing the same, and a cosmetic composition containing the same as an active ingredient.

The invention colored pearlescent relates to pigments, and more particularly simple pearl gloss of the pigment on the surface after the ferric oxide treated surface, a part of ferric oxide (Fe ₂ O ₃₎ by using a reducing and firing techniques Ferrer Spanish metallic oxide (Fe ₃ O ₄ ), and having an appearance color of red, purple, blue and green by an optical color effect, a process for producing the same, and a cosmetic composition containing the same as an active ingredient.

Luster pigments are widely used in industry, especially in automotive coatings, decorative coatings, plastics, paints, printing inks and cosmetic formulations. Especially in cosmetics, it gives a glossy (glaze) to the face by using interference color and surface reflection color, or gives a fine glitter effect to finish the skin brightly.

The commonly used pearlescent pigments are made by surface-treating titanium dioxide with nano-sized thickness on basic materials such as mica, synthetic mica, borosilicate glass and alumina, which are the base materials, and have an interface color generated from light refraction and interference White, gold, red, violet, blue, green color. The interface products are surface treated with various color materials to express red, blue, green and other primary colors.

Generally, referring to FIG. 1, conventionally, a red pearl luster pigment is prepared by dissolving carmine, a natural organic dye that coats a female of a worm called red coccus cacti, with purified water (NaOH) Chloride (AlCl ₃ ) aqueous solution to prepare a mica / titanium dioxide pearlescent pigment by hydrolysis and neutralization to give a lacquered surface of red color.

A purple pearl luster pigment was prepared by surface treating the red carmine and sequential surface treatment of blue ferrocyan blue.

In case of blue pearlescent pigment, potassium ferrocyanide (K ₄ FeCN ₆ ), a raw material of ferrocyan blue, was dissolved in purified water and reacted with an aqueous solution of ferric chloride (FeCl ₃ ).

Green pearl luster pigments were prepared by surface treating ferric oxide (FeO (OH)) on a common mica / titanium dioxide pearlescent pigment and then rendering yellow and then surface treating ferrocyan blue.

However, the colored pearlescent pigments produced by the above-mentioned conventional methods have a problem of discoloration in the acid and alkali condition, or a problem that the surface treated materials are desorbed (bleeding phenomenon).

In the prior art related to the pearl pigment, Korean Patent Laid-Open Publication No. 10-2014-0070035 discloses a method of forming a titanium dioxide layer on a flake pigment, forming a titanium dioxide layer on the formed titanium dioxide layer, The pearl luster pigment is characterized by a reflectance of 55-65% at 400 nm in the visible light region, a reflectance of 12-22% at 500 nm, a reflectance of 18-24% at 600 nm and a reflectance of 40-50% at 700 nm Discloses a pearlescent pigment which is more suitable for use as a cosmetic ingredient by exhibiting an interference color stronger than the existing pearlescent pigment. However, the above-described technique forms only a strong interference color by forming the titanium dioxide layer twice, and the representation of the color is insufficient.

Accordingly, there is a demand for a new colored pearlescent pigment which has the same luster and color as the existing pearlescent pigment but has a light stability and does not cause color separation phenomenon in formulation.

Accordingly, the inventors of the present invention have been studying to develop a new concept of colored pearlescent pigment which is discolored according to pH or does not desorb color when formulated with light stability, and the surface of mica, sericite and alumina, after treatment with titanium dioxide, again, ferric oxide (Fe ₂ O ₃₎ as the surface treatment, and by reduction of ferric oxide (Fe ₂ O ₃₎ via the reducing and firing process to Ferrer Spanish metallic oxide (Fe ₃ O ₄₎ red, Purple, blue, green, and the present invention has been completed.

Korean Patent Publication No. 2014-0070035

An object of the present invention is to provide a colored pearlescent pigment which expresses clear red, purple, blue, green and does not cause bleeding phenomenon.

Another object of the present invention is to provide a process for producing the above colored pearlescent pigment.

Still another object of the present invention is to provide a cosmetic composition containing the above colored pearlescent pigment as an active ingredient.

In order to achieve the above object,

Titanium dioxide (TiO ₂₎ layer is formed in the plate-like pigment, over the titanium dioxide layer is a layer ferric oxide (Fe ₂ O ₃₎ is formed is formed, some ferric oxide (Fe ₂ O ₃₎ layer is Ferrer Spanish metallic oxide (Fe ₃ O ₄ ) layer to provide bright colored pearlescent pigments that exhibit vivid red, purple, blue, and green by optical color effects.

In addition,

(a) a step of surface-treating titanium dioxide on a platelet-shaped pigment to form a titanium dioxide layer;

(b) surface-treating the titanium dioxide layer with ferric oxide (Fe ₂ O ₃ ) to form a ferric oxide (Fe ₂ O ₃ ) layer;

(c) reducing the ferric oxide (Fe ₂ O ₃ ) layer to a ferrous ferric oxide (Fe ₃ O ₄ ) layer through a reduction calcination process.

Further, the present invention provides a cosmetic composition comprising the above colored pearlescent pigment as an active ingredient.

The colored pearlescent pigment according to the present invention can exhibit color and gloss similar to those of red, purple, blue and green pearlescent pigments obtained by surface treatment of common carmine, ferrocyan blue and the like, It is possible to overcome the problems such as change in color development caused by pH conditions and interaction of raw materials, blurring phenomenon (bleeding) or blurring in formulation, and it can be usefully used instead of existing pearlescent pigments.

Also, since it is constituted only by a stable inorganic material, natural or synthetic chemical pigments can be excluded, and a prescription composition free from various regulations will be possible.

1 is a structural view of a conventional red, purple, blue, and green pearlescent pigment.
FIG. 2 is a structural diagram of red, violet, blue, and green pearlescent pigments according to an embodiment of the present invention.
Fig. 3 is a view showing the color development theory of the pearlescent pigment of the present invention.
4 is a view illustrating a manufacturing process of a pearlescent pigment according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail.

As shown in FIG. 2, the colored pearlescent pigment according to the present invention includes a titanium dioxide (TiO ₂ ) layer formed on a platelet pigment, a ferric oxide (Fe ₂ O ₃ ) layer formed on the titanium dioxide layer formed, The oxide (Fe ₂ O ₃ ) layer is reduced to a ferrosperic oxide (Fe ₃ O ₄ ) layer to express bright red, purple, blue, and green by optical color effect.

In one embodiment of the present invention, at least one selected from the group consisting of natural mica, synthetic mica, sericite, and alumina may be used as the platelet pigment, but the present invention is not limited thereto.

In one embodiment of the present invention, the mica has a particle size of d10-d90 and a distribution range of 10-60 mu m, but is not limited to this size.

As shown in FIG. 3, the colored pearlescent pigment according to the present invention is a pigment obtained by converting a portion of the ferric oxide (Fe ₂ O ₃ ) from the surface into ferulic oxide (Fe ₃ O ₄ ) Can be expressed in red, violet, blue, and green due to the effect of cancellation and constructive interference.

In addition, the process for producing a colored pearlescent pigment according to the present invention comprises

(a) a step of surface-treating titanium dioxide on a platelet-shaped pigment to form a titanium dioxide layer;

(b) surface-treating the titanium dioxide layer with ferric oxide (Fe ₂ O ₃ ) to form a ferric oxide (Fe ₂ O ₃ ) layer;

(c) reducing the ferric oxide (Fe ₂ O ₃ ) layer to a ferrous oxide (Fe ₃ O ₄ ) layer through a reductive calcination process.

Hereinafter, a method for producing a colored pearlescent pigment according to the present invention will be described step by step with reference to FIG.

(a) Plate  A step of surface-treating the pigment with titanium dioxide

In the above step, the surface treatment of titanium dioxide on the surface of the platelet-like pigment is carried out by hydrolyzing titanium chloride (TiCl ₄ ) on the surface using a platelet pigment such as natural and synthetic mica as a starting material, (OH) ₂ , followed by calcination at a high temperature to convert it to TiO ₂ .

[Reaction Scheme 1]

In one embodiment of the present invention, at least one selected from the group consisting of natural mica, synthetic mica, sericite, and alumina may be used as the platelet pigment, but the present invention is not limited thereto.

In one embodiment of the present invention, the mica has a particle size of d10-d90 and a distribution range of 10-60 mu m, but is not limited to this size.

In one embodiment of the present invention, the titanium chloride (TiCl ₄ ) and NaOH solutions are adjusted to pH 1-2, added at 70-80 ° C, And adding it while checking. Preferably 20 to 65% by weight of titanium dioxide.

In one embodiment of the present invention, the formed TiO (OH) ₂ can be put into a firing furnace and calcined at 600-850 ° C for 30 minutes to 1 hour.

In one embodiment of the present invention, commercially available mica / titanium dioxide pearlescent pigments may be purchased and used as starting pearlescent pigments, wherein commercially available mica / titanium dioxide pearlescent pigments comprise 20 to 65 wt% At least one selected from the group consisting of particles having an average particle diameter of 5 to 60 占 퐉, a thickness of 1 占 퐉 or less, and an aspect ratio (particle diameter / thickness) of 20 or more. If a commercially available mica / titanium dioxide pearlescent pigment is used, this step may be omitted.

(b): step (b): ferric oxide (Fe ₂ O ₃ ),

In the above step, the surface treatment of the ferric oxide on the platelet-like pigment / titanium dioxide pearlescent pigment prepared in step (a) can be carried out by adding FeCl ₃ 6H ₂ O and FeSO ₄ 7H as precursors to the NaOH solution ₂ O at a temperature of 70-90 ° C and then calcining at a high temperature.

[Reaction Scheme 2]

In one embodiment of the present invention, the pH is adjusted to 1-2, and at least one selected from FeCl ₃ 6H ₂ O and FeSO ₄ 7H ₂ O as precursors is added to the NaOH solution at a concentration of 2-7 wt% , The reaction product is reacted at a temperature of 70-90 DEG C and then the product is dehydrated and dried and calcined at 200-800 DEG C. [

(c) Step: Through reduction-firing Ferric oxide (Fe ₂ O ₃ ) Ferrosperic oxide (Fe ₃ O ₄ )in  Reduction step

This step can be carried out by dispersing 2-5 wt% of a reducing agent such as sodium borohydride (NaBH ₄ ) in the flake pigment / titanium dioxide / peric oxide pearl luster pigment prepared in step (b), as shown in Scheme 3 below And nitrogen gas is supplied from a vacuum baking furnace while maintaining a vacuum, and then subjected to a reduction calcination treatment at 500-600 占 폚.

[Reaction Scheme 3]

In one embodiment of the present invention, after the reducing and calcining step, dehydration is performed after several times of washing with purified water heated at room temperature or warmed, followed by drying and classification at 80-100 ° C.

Further, the present invention provides a cosmetic composition comprising the colored pearlescent pigment prepared as described above as an active ingredient.

According to the present invention, titanium dioxide is surface-treated to a plate-like pigment such as a mica, and the surface of the ferric oxide is subjected to surface treatment. Thereafter, a pearlescent pigment which expresses colors such as red, violet, (See Tables 3, 4 and 12), no skin irritation (see Tables 7 to 10), and UV irradiation or long term normal temperature (See Table 13), natural coloring is possible, and hair-holding durability is excellent (Table 14), so that it can be usefully used as a cosmetic raw material for hair mascara and the like have.

In the cosmetic composition according to the present invention, the pearlescent pigment of the present invention may be blended with an additive such as oil, wax, water or the like, alone or in combination with a conventional powder, to prepare a face powder, a compact, a powder foundation , Makeup base, liquid foundation, base makeup of cream foundation, eye shadow, powder blush, lipstick, eyeliner, mascara, hair mascara.

In the cosmetic composition according to the present invention, the pearlescent pigment of the present invention may be contained in an amount of 0.01 to 60% by weight, preferably 0.1 to 50% by weight, more preferably 0.5 to 10% by weight, based on the total weight of the cosmetic . If the amount of the pearlescent pigment contained in the cosmetic composition is less than 0.01% by weight, the cosmetic effect is insignificant, and if it exceeds 60% by weight, the feeling of use and the shape of the cosmetic composition may occur.

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following Examples are only the preferred embodiments of the present invention, and the present invention is not limited by the following Examples.

<Example 1-4> Preparation of red, purple, blue and green pearlescent pigment

(One) Mica / Titanium Dioxide Pearl Gloss Pigment Manufacture

7 liters of distilled water and 100 g of plate-like mica pigment were put in a beaker, and the temperature was adjusted to 80 DEG C and the pH to 1.5 while stirring.

Titanium chloride (TiCl ₄ ) and caustic soda aqueous solution were prepared, the dosing injector was activated to check for changes in interference color, and the reaction was terminated when red, violet, blue, and green interference colors appeared, respectively.

The theoretical reaction amounts are shown in Table 1 below.

After completion of the reaction, dehydration and drying were carried out, and the mixture was put into a firing furnace to conduct primary firing at 850 ° C.

Example Mica
input
(g) TiCl ₄ (40%) sol
Input (g) Input condition TiO ₂
content
(weight%) color pH Temperature (℃) Appearance color Interference color One 100 348 1.5 80 37 White Red 2 100 485 1.5 80 45 White purple 3 100 547 1.5 80 48 White blue 4 100 696 1.5 80 54 White green

(2) Mica / Titanium dioxide / Ferulic oxide ( Fe ₃ O ₄ ) Manufacture of pearlescent pigment

100 g of the fired contents were put in a beaker again with 7 L of distilled water, and the temperature was adjusted to 80 DEG C and the pH to 2.8 while stirring. Thereafter, an aqueous solution of ferric chloride hydrate (FeCl ₃ 6H ₂ O) and a caustic soda aqueous solution were put in the dosing device for a predetermined period of time.

The theoretical reaction amounts are shown in Table 2 below.

After completion of the reaction, dehydration and drying were carried out, followed by charging into a firing furnace to carry out secondary firing at 700 ° C for 1 hour.

To convert the prepared mica / titanium dioxide / ferric oxide (Fe ₂ O ₃ ) pearlescent pigment surface to ferrous oxide (Fe ₃ O ₄ ), 3% by weight of sodium borohydride (NaBH ₄ ) Was mixed with 97% by weight of a titanium dioxide / ferric oxide (Fe ₂ O ₃ ) pearlescent pigment, and the mixture was put into a reduction firing furnace. Thereafter, while the nitrogen gas was supplied, the vacuum state was maintained and the reaction was carried out at a calcination temperature of 550 DEG C for 4 hours.

After completion of the reaction, the mixture was washed with distilled water two times and then dehydrated, dried and classified to prepare a red, purple, blue and green mica / titanium dioxide / ferrous oxide / ferrous oxide (Fe ₃ O ₄ ) pearlescent pigment.

Example Mica /
TiO ₂
input
(g) FeCl ₃
6H ₂ O
left
(g) NaOH
left
(g) Input condition Fe ₂ O ₃
content
(weight%) color pH Temperature (℃) Appearance color Interference color One 100 28 28.3 1.5 80 7 White Red 2 100 28 28.3 1.5 80 7 White purple 3 100 28 28.3 1.5 80 7 White blue 4 100 28 28.3 1.5 80 7 White green

< Comparative Example  1-4>

Commercially available red, purple, blue and green pearlescent pigments were used.

Experimental Example 1 Measurement of color value (L * a * b *)

(Fe ₃ O ₄ ) pearlescent pigment prepared according to Example 1-4 of the present invention was mixed with nitrocellulose at a ratio of 5% by weight to prepare a BAR APPLICATOR (100 mm / 100 탆), and the color value L * a * b * was measured using a color difference meter (Minolta CM2500 C).

In addition, the color values L * a * b * were measured by comparing the red, violet, blue, and green pearlescent pigment colors of Comparative Example 1-4, and the color difference values were calculated and the results are shown in Table 3 below.

division Example
One Comparative Example
One Example
2 Comparative Example
2 Example
3 Comparative Example
3 Example
4 Comparative Example
4 Red purple blue green L * 58 60 60 58 65 63 63 62 a * 14 16 8.2 6.5 -1.2 0.4 -3.6 -5 b * -2 -3 -4.9 -4 -0.18 -1.02 10 8 ㅿ E 3.0 2.77 2.70 2.66

As a result of measurement of the color difference value, as shown in Table 3, the mica / titanium dioxide / ferrous oxide (Fe ₃ O ₄ ) pearlescent pigment according to the present invention exhibited a color brightness of 58-63, Both blue and green exhibited a color tone comparable to that of commercially available pearlescent pigments.

&Lt; Experimental Example 2 >

(Fe ₃ O ₄ ) pearlescent pigment prepared according to Example 1-4 of the present invention was mixed with nitrocellulose at a ratio of 5% by weight to prepare a BAR APPLICATOR (100 mm / 100 And the gloss was measured at 60 DEG C using a TRI GLOSS METER (Nippon Denshoku, PG-1M). The results are shown in Table 4 below.

division
Example
One Comparative Example
One Example
2 Comparative Example
2 Example
3 Comparative Example
3 Example
4 Comparative Example
4 Red purple blue green Glossiness
60 34 32 29 31 34 32 41 39

As a result of measurement of the gloss, as shown in Table 4, the mica / titanium dioxide / ferrous oxide (Fe ₃ O ₄ ) pearlescent pigment according to the present invention exhibited excellent color reproducibility with respect to commercially available pearlescent pigments of red, violet, And showed a brightness similar to that of comparable brightness.

< Experimental Example  3> Skin stability test

In order to evaluate the safety of the mica / titanium dioxide / ferulic oxide (Fe ₃ O ₄ ) pearlescent pigment prepared according to Examples 1-4 of the present invention on skin, the evaluation criteria proposed by the International Society of Contact Dermatology The standard test method was used.

(A) Procedure: Closure method

(B) Number of subjects to be tested: 10 healthy adults (6 males, 4 females)

(C) Sample application method: An appropriate amount (20 μl) of the four kinds of samples 1, 2, 3 and 4 was applied to a Finn chamber, and the skin was spread on the skin for 48 hours

(D) Test period: 5 days in total

(E) Confirmation method: The subject is checked four times in total (before the start of the test, on the date of patch removal, after 48 hours after the removal of the patch, and after 72 hours). The first subject uses a Finn chamber to perform a skin patch test on the skin. The skin patch is applied for 48 hours. After removing the skin, the test area is marked with a marking pen. After 30 minutes, 48 hours and 72 hours, skin irritation of the test area is judged.

The judgments were classified according to the criteria of the International Contact Dermatitis Reserch Group (ICDRG) of Table 5 below. The mean skin response was calculated by calculating the mean score according to the following formula (1), and the presence or absence of stimulation was judged according to the judgment table of Table 6 below.

sign Criteria Translate score - Negative No stimulation 0 ± Doubtful or
slight reaction and erytherma Mild irritation (slight or barely detectable mild erythema) 0.5 + Erythema + Induration Light stimulus (with clear borderline, weak erythema, edema, palsy) One ++ Erythema + Induration + Vesicle Moderate irritation (marked erythema, papilloma, small scald) 2 +++ Erythema + Induration + Bullae Strong stimulation (severe erythema, alveoli, scab formation) 3

&Quot; (1) &quot;

Where i is the subject number after 30 minutes of patch removal, j is the subject number after 24 hours of patch removal, and k is the subject number after 48 hours of patch removal. Score _{i, j, and k} are the scores indicated according to the criterion of International Society of Contact Dermatological Research, Table 5, after 30 minutes, 48 hours, and 72 hours after removal of the patches. The scores were applied to both erythema and edema reactions.

Judgment Average reactivity Unstimulated (1) 0.00-0.75 Unstable (2) 0.76-1.50 Light stimulus (3) 1.51-2.50 Medium Stimulus (4) 2.51-4.00 Stimulants stimulating (5) 4.01 or higher

The skin patch test results of the mica / titanium dioxide / ferrous oxide (Fe ₃ O ₄ ) pearlescent pigments prepared according to Example 1-4 are shown in Tables 7 to 10 below.

Results of Safety Evaluation for Skin As shown in Tables 7 to 10 above, the mica / titanium dioxide / ferrous oxide (Fe ₃ O ₄ ) pearlescent pigment according to the present invention showed no irritation to the skin and a stable result .

< Example  5> An emulsion type containing a pearlescent pigment according to the present invention hair  Manufacture of mascara formulations

An emulsion type hair mascara formulation containing the components shown in Table 11 below in weight percent was prepared.

Specifically, sorbitan monolate as an emulsifying agent, xanthan gum and a carboxyvinyl polymer as a dispersion stabilizer, and propylene glycol as a moisturizing agent were weighed and mixed, and distilled water and a pearlescent pigment were weighed and mixed with a homomixer, followed by dispersion treatment , And an acrylate / acrylamide copolymer as a film-forming agent and ethyl alcohol as a film-forming aid were weighed and added, respectively, and mixed. Then, the formulation was prepared through vacuum degassing with a small amount of preservative.

< Experimental Example  4> Emulsion type hair  Persistence experiment of mascara formulation

In order to examine the persistence of the emulsion type hair mascara formulation containing the pearlescent pigment according to the present invention, the following experiment was conducted.

The hair mascara formulations containing Examples 1-4 and Comparative Examples 1-4 were taken and coated onto a glass plate with APPLICATOR (100 mm / 100 탆) to prepare a coating film having a width of 5 cm and a thickness of 100 탆. The rupture degree (rupture coating film / total coating film) of the coating film was evaluated by keeping for a time.

[ Evaluation standard ]

Less than 5%: Excellent

5% ~ 10%: Good

10% -20%: Normal

20% or more: bad

The evaluation results are shown in Table 12 below.

division Example
One Example
2 Example
3 Example
4 Comparative Example
One Comparative Example
2 Comparative Example
3 Comparative Example
4 Persistence 5.0% 5.1% 5.0% 5.4% 5.3% 5.2% 5.5% 5.0% Great Good Great Good Good Good Good Good

As shown in Table 12, the emulsion type hair mascara formulation containing the pearlescent pigment according to the present invention showed excellent or good durability as compared with commercially available pearlescent pigment.

<Experimental Example 5> Color discoloration experiment of emulsion type hair mascara formulation

The following experiment was conducted to determine whether the color of the emulsion type hair mascara formulation containing the pearlescent pigment according to the present invention is discolored upon UV irradiation or at room temperature.

Hair mascara formulations containing Example 1-4 and Comparative Example 1-4 were weighed into a 50 ml clear mouth reagent bottle and placed in a UV-type square, and the color change was observed after 2 hours.

After standing for 2 months at room temperature, color discoloration was observed, and the results are shown in Table 13 below.

division Example
One Example
2 Example
3 Example
4 Comparative Example
One Comparative Example
2 Comparative Example
3 Comparative Example
4 UV type square No discoloration No discoloration No discoloration No discoloration decolorization decolorization decolorization decolorization Leave at room temperature No discoloration No discoloration No discoloration No discoloration decolorization decolorization decolorization decolorization

As shown in Table 13, the emulsion-type hair mascara formulation containing the pearlescent pigment according to the present invention did not discolor even when exposed to UV in the UV type field and left at normal temperature for a long period of time, Hair mascara formulations appeared to be discolored.

Accordingly, the hair mascara formulations containing the pearlescent pigment according to the present invention can be used for a long period of time because they are not discolored or discolored even when exposed to UV light or left at room temperature for a long period of time.

<Experimental Example 6> Sensory evaluation test of emulsion type hair mascara formulation

For female hair mascara formulations containing Examples 1-4 and Comparative Examples 1-4, 50 female panelists aged 25 to 40 years were subjected to sensory evaluation of usability, The results are shown in Table 14 below.

[Evaluation standard]

The number of groups with favorable preferences was evaluated by comparing Examples 1-4 and Comparative Examples 1-4.

division Example
One Comparative Example
One Example
2 Comparative Example
2 Example
3 Comparative Example
3 Example
4 Comparative Example
4 Natural color representation 26 24 24 26 28 22 23 27 Hair attachment persistence 27 23 26 24 28 22 26 24

As shown in Table 14, the hair mascara formulations containing the pearlescent pigment according to the present invention did not deteriorate in quality compared to the conventional products in terms of natural coloring power and hair adhesion persistency, and in the case of red and blue, Products.

Therefore, the pearlescent pigment according to the present invention can be used effectively as a raw material for cosmetics such as hair mascara, since color is not discolored or discolored even when irradiated with UV or left at a room temperature for a long time, natural color expression is possible, have.

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

Claims (6)

(TiO ₂ ) layer, a ferric oxide (Fe ₂ O ₃ ) layer and a ferrospike oxide (Fe ₃ O ₄ ) layer are sequentially laminated on the plate-shaped pigment, and the ferrosperic oxide (Fe ₃ O ₄ ) Is formed by reducing a part of the ferric oxide (Fe ₂ O ₃ ) layer,
The condition for reducing a part of the ferric oxide (Fe ₂ O ₃ ) layer to a ferrous oxide (Fe ₃ O ₄ ) layer is that the titanium dioxide (TiO ₂ ) layer and the ferric oxide (Fe ₂ O ₃ ) 95 to 98% by weight of the sequentially stacked pigments and 2-5% by weight of sodium borohydride (NaBH ₄ ) are put into a vacuum sintering furnace, and nitrogen gas is introduced and the vacuum is maintained. Colored pearlescent pigment expressing red, purple, blue and green. The method according to claim 1,
Wherein the platelet-shaped pigment is at least one selected from the group consisting of mica, sericite and alumina. (a) a step of surface-treating titanium dioxide on a platelet-shaped pigment to form a titanium dioxide layer;
(b) surface-treating the titanium dioxide layer with ferric oxide (Fe ₂ O ₃ ) to form a ferric oxide (Fe ₂ O ₃ ) layer; And
(c) 95-98% by weight of the pigment treated in the step (b) and 2-5% by weight of sodium borohydride (NaBH ₄ ) are introduced into a vacuum sintering furnace, Reducing and calcining the ferric oxide (Fe ₂ O ₃ ) layer at 600 ° C. to reduce a part of the ferric oxide (Fe ₂ O ₃ ) layer to a ferrous oxide (Fe ₃ O ₄ ) layer;
&Lt; RTI ID = 0.0 &gt; 1, &lt; / RTI &gt; The method of claim 3,
The surface treatment of the ferric oxide (Fe ₂ O ₃ ) in the step (b) may be performed by adding at least one selected from FeCl ₃ 6H ₂ O and FeSO ₄ 7H ₂ O as a precursor to the NaOH solution at a concentration of 2-7 wt% Reacting at a temperature of 70 to 90 DEG C, dehydrating and drying the product, and calcining the product at 200 to 800 DEG C. delete A cosmetic composition comprising the colored pearlescent pigment of claim 1 as an active ingredient.

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