阅读说明：本技术 包括正电荷油的紫外线阻断用化妆料组合物 (UV-blocking cosmetic composition comprising positively charged oil ) 是由 金姃恩 金善映 朴贞银 于 2018-11-08 设计创作，主要内容包括：本发明公开一种包括正电荷油的紫外线阻断用化妆料组合物,通过带正电荷的油提高无机粉体的分散性而能够提高剂型稳定性。所述包括正电荷油的紫外线阻断用化妆料组合物的特征在于包括：油相部,包括含有一个以上的胺基的0.1重量％至2重量％的正电荷油、含有无机粉体的5重量％至30重量％的无机紫外线阻断剂、及15重量％至80重量％的硅油与烃油中的任一种以上；及水相部,包括水与醇类化合物中的任一种以上,并且形成为油包水或油包水包油的剂型。(The present invention discloses an ultraviolet-blocking cosmetic composition comprising a positively charged oil, which can improve the dispersibility of inorganic powder by the positively charged oil and can improve the formulation stability. The ultraviolet-blocking cosmetic composition including a positively-charged oil is characterized by comprising: an oil phase part including 0.1 to 2 wt% of a positively charged oil containing one or more amine groups, 5 to 30 wt% of an inorganic ultraviolet blocking agent containing an inorganic powder, and 15 to 80 wt% of any one or more of a silicone oil and a hydrocarbon oil; and a water phase part including at least one of water and alcohol compounds, and formed into a water-in-oil or oil-in-water-in-oil dosage form.)

1. A uv-blocking cosmetic composition comprising a positively charged oil, comprising:

an oil phase part including 0.1 to 2 wt% of a positively charged oil containing one or more kinds of amine groups, 5 to 30 wt% of an inorganic ultraviolet blocking agent containing an inorganic powder, and 15 to 80 wt% of any one or more of a silicone oil and a hydrocarbon oil; and

an aqueous phase portion including at least one of water and an alcohol compound,

the cosmetic composition is formed in a water-in-oil (W/O) or oil-in-water-in-oil (O/W/O) dosage form.

2. The uv-blocking cosmetic composition according to claim 1, comprising a positively charged oil, wherein the positively charged oil is a polydimethylsiloxane (silin) type compound comprising one or more amine groups.

3. The ultraviolet-blocking cosmetic composition comprising a positively-charged oil according to claim 1, wherein the positively-charged oil is any one or more selected from the group consisting of aminopropylpolydimethylsiloxane (aminopropyldimethicone), amino-terminated polydimethylsiloxane (amodimethicone), aminoethylaminopropyldimethicone (aminoethylaminopropyldimethicone), and bisaminopropyldimethicone (bis-aminopropyldimethicone).

4. The ultraviolet-blocking cosmetic composition containing a positively-charged oil according to claim 1, wherein the inorganic powder is one or more transition metal oxides selected from the group consisting of titanium dioxide, titanium oxide, and zinc oxide.

5. The ultraviolet-blocking cosmetic composition comprising a positively-charged oil according to claim 1, wherein the inorganic powder is a complex of a metal salt and a fatty acid coated on the surface thereof.

6. The ultraviolet-blocking cosmetic composition according to claim 5, wherein the metal salt is selected from the group consisting of aluminum oxide, aluminum hydroxide and aluminum stearate, and the fatty acid is one or more selected from the group consisting of stearic acid, isostearic acid, polyhydroxystearic acid and sorbitan isostearate.

7. The ultraviolet-blocking cosmetic composition comprising a positively-charged oil according to claim 1, wherein the oil phase further comprises an organic ultraviolet-blocking agent.

8. The uv-blocking cosmetic composition according to claim 7, wherein the organic uv-blocking agent is any one or more selected from the group consisting of anthranilic acid-based compounds, salicylic acid-based compounds, cinnamic acid-based compounds, benzophenone-based compounds, p-aminobenzoic acid-based compounds, homosalate, poly-15-silicon, octocrylene, diethylhexylbutamido triazone, cresoltrozole trisiloxane, ethylhexyl triazone, ethylhexyl dimethyl-p-aminobenzoate, cresoltrozole, bisethylhexyloxyphenol methoxyphenyl triazine, butylmethoxydibenzoylmethane, and diethylamino hydroxybenzoyl hexyl benzoate.

9. The ultraviolet-blocking cosmetic composition comprising a positively-charged oil according to claim 1, wherein the silicone oil is any one or more selected from the group consisting of n-siloxanes, polydimethylsiloxanes excluding amine groups, cyclosiloxanes, and mixtures thereof, and the hydrocarbon oil is a polar oil or a nonpolar oil having a carbon number of 3 to 20.

10. The ultraviolet-blocking cosmetic composition comprising a positively-charged oil according to claim 1, wherein the oil phase further comprises at least one selected from the group consisting of a viscosity modifier, a filler, a surfactant and a silicone elastomer.

11. The ultraviolet-blocking cosmetic composition comprising a positively-charged oil according to claim 1, wherein the aqueous phase further comprises at least one of a thickener selected from the group consisting of acrylate compounds, carbomer compounds and saccharide compounds, and an ultraviolet-blocking agent selected from the group consisting of phenylbenzimidazole sulfonic acid, 4-methylbenzylidene camphor and methylene bis-benzotriazole tetramethylbutylphenol.

12. The ultraviolet-blocking cosmetic composition comprising a positively-charged oil according to claim 1, characterized in that the ultraviolet-blocking cosmetic composition is of an oil-in-water-in-oil (O/W/O) type further comprising an internal oil phase portion formed inside the aqueous phase portion.

13. The ultraviolet-blocking cosmetic composition comprising a positively-charged oil according to claim 12, wherein the internal oil phase comprises at least one of a surfactant and an ultraviolet-blocking agent.

14. The ultraviolet-blocking cosmetic composition comprising a positively-charged oil according to claim 13, wherein the surfactant is at least one selected from the group consisting of stearate compounds, lactone compounds, polyethylene glycol compounds, polyglycerol compounds, sugar surfactants and ionic surfactants.

15. The uv-blocking cosmetic composition according to claim 13, wherein the uv-blocking agent is at least one selected from the group consisting of bisethylhexyloxyphenol methoxyphenyl triazine, butylmethoxydibenzoylmethane, diethylamino hydroxybenzoyl hexyl benzoate, anthranilic acid-based compound, salicylic acid-based compound, cinnamic acid-based compound, benzophenone-based compound, p-aminobenzoic acid-based compound, homosalate, poly-silicon-15, octocrylene, diethylhexyl butamido triazone, cresoltrazol trisiloxane, ethylhexyl triazone, dimethyl-p-aminobenzoate, and cresoltrazol.

Technical Field

The present application claims priority based on korean patent application No. 10-2017-0149874, 10.11.2017, the entire contents of which are incorporated herein by reference.

The present invention relates to a cosmetic composition for blocking ultraviolet rays, and more particularly, to a cosmetic composition for blocking ultraviolet rays, which can improve the dispersibility of inorganic powder by positively charged oil and can improve the formulation stability, and which includes positively charged oil.

Background

The water-in-oil (W/O) type ultraviolet ray blocking agent has the following advantages: the water resistance is improved compared with oil-in-water (O/W) type ultraviolet ray blocking agents, and inorganic ultraviolet ray blocking agents which scatter ultraviolet rays except ultraviolet ray absorbers can be used in a high content. However, the water-in-oil type ultraviolet ray blocking agent has a problem of sticky feeling in use due to the use of a surfactant having a low hydrophilic-lipophilic balance (HLB) value. In order to solve the above-mentioned problems of the water-in-oil type ultraviolet ray blocking agent (stickiness due to the use of a surfactant), it has been studied in the art to also prepare the water-in-oil type ultraviolet ray blocking agent into a powder emulsion (pickering emulsion) type. However, unlike an oil-in-water type uv blocker in which large particles of several tens of μm order can be stabilized by a thickener having a three-dimensional structure or the like, the use of raw materials for the water-in-oil type uv blocker that can improve stability is limited, and thus the above-mentioned problems cannot be solved.

In the case of an inorganic ultraviolet ray blocking agent coated with a metal salt such as aluminum hydroxide or alumina, or a fatty acid such as stearic acid, it is easily dispersed in a highly polar ester oil such as alkyl benzoate, but the ester oil has a residual feeling and a sticky feeling, and thus it is difficult to use it at a high content. Therefore, in order to develop a product having a light and thin feeling of use, a volatile silicone oil or hydrocarbon (hydrocarbon) oil may be used in the continuous phase, but in this case, the dispersibility of the inorganic ultraviolet ray blocking agent is low, and a phenomenon of agglomeration between powders (powder) and a phenomenon of oil separation which is not well mixed occur. Therefore, in order to improve the dispersibility and formulation stability of the ultraviolet-blocking cosmetic composition, it is necessary to search for a component that exerts the effect of crosslinking an oil having a light and thin texture in use with an inorganic ultraviolet-blocking agent.

Disclosure of Invention

Accordingly, an object of the present invention is to provide an ultraviolet-blocking cosmetic composition including a positively charged oil, which can improve the dispersibility of inorganic powder by the positively charged oil and can improve the formulation stability.

In order to achieve the above object, the present invention provides an ultraviolet-blocking cosmetic composition comprising a positively charged oil, the composition comprising: an oil phase part including 0.1 to 2 wt% of a positively charged oil containing one or more kinds of amine groups, 5 to 30 wt% of an inorganic ultraviolet blocking agent containing an inorganic powder, and 15 to 80 wt% of any one or more of a silicone oil and a hydrocarbon oil; and a water phase part which comprises at least one of water and alcohol compounds and is formed into a water-in-oil (W/O) or oil-in-water-in-oil (O/W/O) dosage form.

(Effect of the invention)

The ultraviolet-blocking cosmetic composition of the present invention comprising a positively charged oil improves the dispersibility of inorganic ultraviolet-blocking powder by the positively charged oil, thereby preventing aggregation and oil separation between powders, improving the stability of the formulation, and achieving a light, thin and refreshing feeling in use.

Drawings

Fig. 1 is an image of ultraviolet-blocking cosmetic compositions prepared according to an example of the present invention and comparative examples, which were observed using an optical microscope.

Detailed Description

The present invention will be described in detail below.

The ultraviolet-blocking cosmetic composition comprising a positively-charged oil of the present invention is characterized by comprising: an oil phase part including 0.1 to 2 wt% of a positively charged oil containing one or more kinds of amine groups, 5 to 30 wt% of an inorganic ultraviolet blocking agent containing an inorganic powder, and 15 to 80 wt% of any one or more of a silicone oil and a hydrocarbon oil; and a water phase part which comprises at least one of water and alcohol compounds and is formed into a water-in-oil (W/O) or oil-in-water-in-oil (O/W/O) dosage form.

The present invention is to improve a conventional ultraviolet-blocking cosmetic composition in which inorganic powder (powder) such as titanium dioxide is aggregated and oil is phase-separated due to low dispersibility when an inorganic ultraviolet-blocking agent is dispersed only with silicone oil or nonpolar hydrocarbon oil, and to improve formulation stability by including positively charged oil in the cosmetic composition to thereby prevent aggregation of inorganic powder and phase separation of inorganic powder, and to thereby realize a light, thin and refreshing feeling of use, and is an unprecedented invention. In other words, when the pickering emulsion is formed using an amphiphilic inorganic powder, the inorganic powder has improved formulation stability because the positively charged oil used in the present invention is uniformly aligned to the interface, and thus the sticky feeling phenomenon caused by using a conventional surfactant is reduced, and the association and separation phenomenon caused by non-uniform particles is suppressed, whereby a large pickering emulsion on the order of several tens of micrometers is stabilized, and thus a cosmetic having a large phase inversion feeling and being easily applied can be prepared.

The formulation of the ultraviolet ray blocking cosmetic composition comprising a positively charged oil according to the present invention is in the form of water-in-oil (W/O) or oil-in-water-in-oil (O/W/O), and more specifically, the following formulations can be mentioned: a water-in-oil formulation comprising a water phase containing water (water) and an alcohol compound, and the like, and an oil phase; and an oil-in-water-in-oil type including an internal oil phase part containing at least one of a surfactant and an ultraviolet blocking agent, an external oil phase part containing the positively charged oil, and an aqueous phase part located between the internal oil phase part and the external oil phase part.

The positively charged oil constituting the oil phase portion has a positive charge and one or more amino groups (-NH2) in the molecule, and the amino groups in the oil are oriented between the surface of the metallic inorganic powder and the oil to improve the dispersibility of the inorganic uv blocking agent including the inorganic powder (more specifically, to improve the dispersibility of the inorganic uv blocking agent dispersed in at least one of the silicone oil and the hydrocarbon oil), thereby playing a role of uniformly aligning the inorganic powder at the interface between the water phase and the oil phase. Examples of the positively charged oil include polydimethylsiloxane (dimethicone) compounds including one or more kinds of amine groups, and more specifically, include one or more kinds of aminopropyl dimethicone (aminopropyl dimethicone), amino-terminated dimethicone (amodimethicone), aminoethylaminopropyl dimethicone (aminoethylpropyldimethicone), and bisaminopropyldimethicone (bis-aminopropyl dimethicone).

The content of the above-mentioned positively-charged oil is 0.1 to 2% by weight, preferably 0.5 to 2% by weight, more preferably 1 to 2% by weight, based on the total weight of the cosmetic composition, and when the content of the above-mentioned positively-charged oil is less than 0.1% by weight, based on the total weight of the cosmetic composition, the dispersing effect is very slight, and when it exceeds 2% by weight, there is a fear that skin irritation or the like is caused.

Next, the inorganic ultraviolet ray blocking agent functions to physically scatter ultraviolet rays, as an ultraviolet ray scattering agent including inorganic powder, unlike an ultraviolet ray absorbent that absorbs ultraviolet rays. The inorganic ultraviolet ray blocking agent may include only inorganic powder, or may be in a form in which inorganic powder is dispersed in oil. On the other hand, the inorganic powder may be a composite of a metal salt and a fatty acid coated on the surface thereof (including a dispersant such as silicon oxide, hydrogenated polydimethylsiloxane, and triethoxyoctylsilane, and a coating agent generally used in the case of using an inorganic powder, if necessary). This reduces the reactivity of the nano-sized inorganic powder as a catalyst (metal salt) and increases the dispersibility in oil (fatty acid), and examples of the metal salt include at least one of alumina, aluminum hydroxide, and aluminum stearate, and examples of the fatty acid include at least one of stearic acid, isostearic acid, polyhydroxystearic acid, and sorbitan isostearate. In addition, the content of the metal salt and the fatty acid, the coating thickness, and the like, all matters related to the surface coating of the inorganic powder can be applied by a known technique.

In addition, as the inorganic powder, one or more of ordinary transition metal oxides known in the art, such as titanium dioxide, titanium oxide, and zinc oxide, can be used without particular limitation. The content of the inorganic uv-ray blocking agent is 5 to 30 wt%, preferably 10 to 27 wt% based on the total weight of the cosmetic composition, and when the content of the inorganic uv-ray blocking agent is less than 5 wt% based on the total weight of the cosmetic composition, the effect of blocking uv-rays is very slight, and when it exceeds 30 wt%, a high content of inorganic powder is not sufficiently dispersed in the form of a preparation, and there is a problem that the use as a cosmetic is not good (i.e., the application is dry).

Further, at least one of the silicone oil and the hydrocarbon oil is used for improving the dispersibility of the inorganic powder, and one of the silicone oil and the hydrocarbon oil may be selected and used. The silicone oil may be any conventional silicone oil known in the art, and examples thereof include n-siloxanes such as disiloxane and trisiloxane, polydimethylsiloxanes excluding amino groups, cyclopentasiloxane, cyclohexasiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, cyclosiloxanes such as decamethylcyclohexasiloxane, and mixtures thereof.

The hydrocarbon oil may be a conventional polar oil or a nonpolar oil known in the art having a carbon number of 3 to 20, preferably 5 to 15, and examples of the polar oil include C12-C15 alkyl benzoate, dioctyl carbonate, cetyl ethylhexanoate, decyl cocoate, diisostearyl malate, butanediol dicaprylate/dicaprate, coco-caprylate/caprate, pentaerythritol tetraisostearate, isopropyl palmitate, pentaerythritol tetraethylhexanoate, and a mixture thereof, and examples of the nonpolar oil include an alkane compound such as isodecane, isododecane, and isohexadecane, an ether compound such as dioctyl ether, and a mixture thereof.

The content of any one or more of the above-mentioned silicone oil and hydrocarbon oil is 15 to 80% by weight, preferably 30 to 70% by weight, relative to the total weight of the cosmetic composition, and when it exceeds the above range, the stability of the dosage form may be lowered. On the other hand, the oil phase may further include, as necessary, at least one of a viscosity modifier such as distearyldimethylammonium hectorite, a filler (oil-absorbing powder) such as silica, a W/O surfactant such as lauryl polydiethylene glycol (PEG) -9 polydimethylsiloxyethyl polydimethylsiloxane, and a silicone elastomer.

On the other hand, the oil phase may further include an organic uv blocking agent. Examples of the organic uv-blocking agent include uv-blocking agents generally used in the art (one or more of them can be used), such as anthranilic Acid compounds, salicylic Acid compounds such as ethylhexyl salicylate, cinnamic Acid compounds such as ethylhexyl methoxycinnamate, benzophenone compounds, p-aminobenzoic Acid compounds, homosalate, poly-15, octocrylene, diethylhexylbutamido triazone, cresyl trimethosiloxane, ethylhexyl triazone, dimethyl-p-aminobenzoic Acid (PABA) ethylhexyl ester, cresyl trozole, Bis-ethylhexyloxyphenol methoxyphenyl triazine (Bis-ethylhexyloxyphenyl triazine), butylmethoxydibenzoylmethane (Butyl methoxydibenzoylmethane), and diethyl aminohydroxybenzoyl hexyl benzoate (diethyl hydroxybenzoyloxybenzoate benzoate). The content of the organic ultraviolet ray blocking agent is not particularly limited.

The aqueous phase includes water (water) and alcohol compounds, more specifically, water such as purified water; alcohol compounds such as propylene glycol, phenoxyethanol, and ethylhexyl glycerin; acetic acid compounds such as disodium ethylenediaminetetraacetate (e.d.t.a. -2NA), and the like. In addition, the aqueous phase may further include: thickening agents such as acrylate compounds including polyacrylate-3, carbomer compounds and saccharide compounds; and any one or more ultraviolet ray blocking agents such as phenylbenzimidazole sulfonic acid, 4-methylbenzylidene camphor, and methylenebis-benzotriazole tetramethylbutylphenol.

In addition, when the cosmetic composition of the present invention is in the form of oil-in-water-in-oil (O/W/O), an internal oil phase portion including at least one of a surfactant and an ultraviolet blocking agent and located inside the aqueous phase portion may be formed (in this case, the oil phase portion including the positively charged oil is referred to as an external oil phase portion).

Examples of the surfactant include stearate compounds such as PEG-100 stearate (a surfactant having a high HLB capable of forming an O/W formulation), lactone compounds such as methoxy PEG-114 polycaprolactone (an amphiphilic polymer having both a hydrophilic moiety and a lipophilic moiety, which is a solid state at or below the melting point of an interface between a lipophilic component and an aqueous phase in an oil-in-water type cosmetic to prevent the coagulation and bonding of the internal oil phase), polyethylene glycol compounds, polyglycerol compounds, saccharide surfactants, and ionic surfactants.

Examples of the uv-blocking agent include one or more of general uv-blocking agents used in the art, such as bisethylhexyloxyphenol methoxyphenyl triazine, butyl methoxydibenzoylmethane, diethyl aminohydroxybenzoyl hexyl benzoate, anthranilic acid compounds such as anthranilic acid compound and ethylhexyl salicylate, cinnamic acid compounds such as ethylhexyl methoxycinnamate, benzophenone compounds, p-aminobenzoic acid compounds, homosalate, poly-15, octocrylene, diethylhexylbutyrylamidotriazone, cresoltrimethicone, ethylhexyl triazone, dimethyl-p-aminobenzoate, and cresoltrimetzole.

On the other hand, the content of the aqueous phase part and the internal oil phase part may vary depending on the intended dosage form and the like, and is not particularly limited. However, as an example, when the formulation of the cosmetic composition is of a water-in-oil type, the content of the above-mentioned aqueous phase part may be 10% by weight to 60% by weight with respect to the entire weight of the cosmetic composition, and when the formulation of the cosmetic composition is of an oil-in-water type, the content of the above-mentioned aqueous phase part may be 5% by weight to 30% by weight with respect to the entire weight of the cosmetic composition, and the content of the above-mentioned internal oil phase part may be 5% by weight to 30% by weight with respect to the entire weight of the cosmetic composition.

Hereinafter, preferred embodiments are described to help understanding of the present invention, and the following embodiments are merely to exemplify the present invention, and it is obvious to those skilled in the art that various changes and modifications can be made within the scope and technical spirit of the present invention, and such changes and modifications naturally fall within the scope of the appended claims.

[ example 1]Preparation of UV-blocking cosmetic composition comprising positively charged oil

First, according to the composition of example 1 shown in table 1 below, the internal oil phase component (internal oil phase) was heated to 75 ℃ to be uniformly dissolved and mixed, and the external oil phase component (external oil phase) was also uniformly dissolved and mixed. Next, the aqueous phase component (aqueous phase portion) was heated to 70 ℃ to be uniformly dissolved and mixed, and then the internal oil phase component mixture was added with stirring to prepare an oil-in-water type mixture, and the external oil phase component mixture was added with stirring to prepare an oil-in-water type ultraviolet-blocking cosmetic composition.

[ Table 1]

The method is characterized in that the method is in a full-color unit: weight% (wt%)

[ example 2]Preparation of UV-blocking cosmetic composition comprising positively charged oil

An oil-in-water-in-oil type ultraviolet ray blocking cosmetic composition was prepared in the same manner as in example 1, except that the composition of example 2 in table 1 was changed.

Comparative example 1]Preparation of cosmetic composition for blocking ultraviolet rays

An oil-in-water-in-oil type ultraviolet ray blocking cosmetic composition was prepared in the same manner as in example 1, except that the composition of comparative example 1 in table 1 was changed.

Comparative example 2]Preparation of cosmetic composition for blocking ultraviolet rays

An oil-in-water-in-oil type ultraviolet ray blocking cosmetic composition was prepared in the same manner as in example 1, except that the composition of comparative example 2 in table 1 was changed.

[ test example 1]Dosage form stability assessment

The cosmetic compositions prepared by the above examples 1 and 2 and comparative examples 1 and 2 were observed by an optical microscope (ECLIPSE 80i, Nikon corporation, japan) to evaluate the formulation stability (powder emulsion stability). Fig. 1 is an image of an ultraviolet-blocking cosmetic composition prepared according to an example of the present invention and a comparative example, in which a in fig. 1 corresponds to example 1, B in fig. 1 corresponds to example 2, C in fig. 1 corresponds to comparative example 1, and D in fig. 1 corresponds to comparative example 2, as observed with an optical microscope.

As a result of the observation and evaluation of the formulation stability of each cosmetic composition as described above, the following was confirmed: as shown in fig. 1, in comparative example 1 in which a positively charged oil (aminopropyl polydimethylsiloxane or amino-terminated polydimethylsiloxane) was not used, the titanium dioxide powder was not uniformly arranged at the interface between the oil phase and the water phase, and in contrast, in example 1 or example 2 in which a positively charged oil was used, the titanium dioxide powder was uniformly arranged at the interface between the oil phase and the water phase as particles having a size of 10 μm to 20 μm. On the other hand, the alignment uniformity of the particles of comparative example 2 was similar in appearance to example 2, but it was confirmed from the stability results of table 2 below that example 2 was stable under room temperature, 45 degrees, Cycle + vibration (Cycle + vibration, Cycle + Sh), Cycle (Cycle) conditions, but comparative example 2 rapidly separated and thus showed a significant difference in the stability of the dosage form.

[ test example 2]Evaluation of hardness and constant temperature stability

The hardness and the constant temperature stability of the cosmetic compositions prepared by the above examples 1 and 2 and comparative examples 1 and 2 were evaluated. Hardness was measured using SUN RHEO METER compoc-100 (SUN sciencific co., ltd., japan), and the results of measuring the constant temperature stability by placing each cosmetic composition in a constant temperature bath maintained at a specific temperature are shown in table 2 below. On the other hand, in the following table 2, in the constant temperature bath vibrating at the rotation speed of 150rpm, in a fixed cycle (in the form of-15 ℃ to 45 ℃ heating, in each temperature repeat for 12 hours) to measure Cyc + Sh (cycle + vibration), in the form of-15 ℃ to 45 ℃ heating, in each temperature repeat for 12 hours to measure Cyc (cycle).

[ Table 2]

As shown in table 2, in comparative examples 1 and 2 in which the positively charged oil was not used, since the pickering emulsion (powder emulsion) particles were large and non-uniform, the particles were bonded to each other, and the hardness decreased after 4 weeks, and the oil separation phenomenon occurred under most of the temperature conditions, and the constant temperature stability was also problematic. On the contrary, in examples 1 and 2 using the positively charged oil, since the pickering emulsion (powder emulsion) particles were small and uniform, the hardness was maintained without decreasing after 4 weeks, and the constant temperature stability was excellent under all temperature conditions, whereby it was confirmed that the oil separation phenomenon at room temperature and high temperature, which is generated when the inorganic powder was not sufficiently dispersed in the oil of the external oil phase, was improved by using the positively charged oil. On the other hand, it is found that in comparative example 1, since the inorganic powder is not uniformly arranged at the interface to form large particles together with the oil separation phenomenon, the phenomenon in which particles are bonded and water in the internal phase is also separated occurs at a low temperature, and the separation is not performed in example 1 using the positively charged oil, thereby improving the stability at a low temperature.