KR20210000283A - An ultraviolet screening dispersion comprising alkane-based oil as a dispersion medium and a cosmetic composition containing the same - Google Patents

Abstract

The present invention relates to a UV-blocking functional dispersion comprising an ultrafine inorganic particle dispersoid, a coconut alkane-based oil dispersion medium and a dispersion stabilizer, a UV-blocking cosmetic composition comprising the same as an active ingredient, and a method for preparing the same. The present invention provides an improved UV protection effect and a long-lasting effect by using a plant-derived oil that is safe for the human body as a dispersion medium and stably dispersing an ultrafine inorganic particle dispersoid. Also, the present invention can exhibit excellent usability and remarkable compatibility with other cosmetic ingredients.

Description

An ultraviolet screening dispersion comprising alkane-based oil as a dispersion medium and a cosmetic composition containing the same}

The present invention relates to a UV-blocking dispersion using an alkane-based oil as a dispersion medium, and more particularly, to a UV-blocking dispersion using coconut alkane-based oil as a dispersion medium, a cosmetic composition containing the same, and a method for producing the same.

In general, ultraviolet rays included in sunlight have a wavelength of 200 to 400 nm, and are divided into UV-C, UV-B, and UV-A depending on the wavelength range.

UV-C has a short wavelength in the range of 200 to 290 ㎚, and is almost completely absorbed by the ozone layer, so it does not reach the surface. UV-B is a mid-wavelength region of ultraviolet rays of 290 ~ 320 ㎚, part of which is absorbed by the ozone layer, but the rest passes through the ozone layer to reach the surface. UV-A corresponds to a long wavelength range of 320 to 400 nm, is not absorbed by the ozone layer and reaches the surface. In addition, UV-A has the ability to pass through glass unlike other wavelengths.

These 　ultraviolet rays are known to cause various side effects on the skin. Ultraviolet rays are the main cause of skin aging as well as pigmentation such as spots and freckles, age spots, and skin cancer. Furthermore, about 80% of ultraviolet rays reach the surface even on a shaded or cloudy day, and almost all glass, such as automobile glass and house glass, pass through. Also, in the case of clothes, synthetic fibers have little blocking effect, and only 70% of natural fibers such as cotton products are blocked.

Ultraviolet rays that affect the skin are divided into UV-A and UV-B. UV-B promotes sunburn (causing erythema and blisters), skin cancer, pigmentation and skin protein degeneration, keratinization of skin cells, and UV-A It causes pigmentation, phototoxicity, and photoallergy, and penetrates to the dermal layer of the skin, destroys collagen and elastin, causing skin aging, causing spots and blemishes. As such, various types of 　 UV rays 　 blockers have been developed to protect the skin from harmful 　 UV rays.

Among the raw materials that can block UV-B, octinoxate (Ethylhexyl methoxycinnamate: EHMC) is the most used material as an organic sunscreen. Recently, it is said that it can seriously affect the marine environment and ecosystem by increasing the possibility of endocrine disruption of marine organisms. As the results were announced, there is a movement to ban the sale and distribution of sunscreens containing octinoxate along with oxybenzene.

As a material that blocks UV-A, organic sunscreens include avobenzone (Butyl Methoxydibenzoylmethane: BMDBM). Avobenzone is the only material that selectively absorbs the UV-A region among organic sunscreens, and is widely used worldwide due to its excellent UV-blocking ability and excellent price competitiveness. However, avobenzone has a high probability of re-precipitating crystals depending on the cosmetic formulation as it has poor compatibility with other cosmetic materials, and reacts with alumina (Al) surface-treated on ultrafine titanium dioxide, an inorganic sunscreen, to produce alumina ions. It is one of the materials that is limited by its use and concentration because it can form a complex around.

On the other hand, silicone oil has been widely used in cosmetics due to its superior feeling of use and superior compatibility with other types of cosmetic ingredients compared to ester oil. In the case of UV-blocking cosmetics, which have to use a large amount of organic UV-blocking materials with heavy feeling, silicone oil has been widely used to minimize discomfort when applying the skin, but recently, the European Chemicals Agency (ECHA) Among oils, cyclotetrasiloxane (D4) and cyclopentasiloxane (D5) were listed as Substances of Very High Concern (SVHC) candidates, and the European Union (EU) legislation restricting the content of D4 and D5 in cosmetics to less than 0.1%. As a result, the need for replacement of these in cosmetics increased.

In order to ensure safety, the present inventors have used an alkane-based oil derived from a plant component to replace the silicone oil as a dispersion medium, and have come to develop a dispersion containing inorganic particles to replace the organic sunscreen.

An object of the present invention is to provide a dispersion comprising a plant-derived coconut alkane oil dispersion medium, an ultrafine inorganic particle dispersion, and a dispersion stabilizer, which has excellent UV protection function and excellent UV protection persistence.

An object of the present invention is to provide a UV-blocking functional dispersion having excellent compatibility with general cosmetics and excellent feeling of use, using natural oils derived from plants that can replace silicone oils with suspected safety issues as a dispersion medium.

In addition, an object of the present invention is to provide a cosmetic composition for a UV-blocking function, including a UV-blocking functional dispersion having excellent dispersion stability as an active ingredient, and significantly improving the texture of use of an existing inorganic UV-blocking cosmetic.

Another object of the present invention is to provide a method for preparing the excellent UV blocking functional dispersion.

In order to achieve the above object, the present invention provides a UV blocking functional dispersion comprising an ultrafine inorganic particle dispersion, a coconut alkane oil dispersion medium, and a dispersion stabilizer.

In one embodiment of the present invention, the inorganic particles may be any one or two or more selected from the group consisting of titanium dioxide, zinc oxide, iron oxide, copper oxide, aluminum oxide, cerium oxide, and zirconium oxide.

In one embodiment of the present invention, the ultrafine inorganic particle dispersion may be surface-treated with any one or a combination of alumina and stearic acid.

In one embodiment of the present invention, the ultrafine inorganic particle dispersoid may be included in an amount of 40 to 75% by weight, an alkane oil in an amount of 20 to 40% by weight, and a dispersion stabilizer in an amount of 0.1 to 5% by weight.

In one embodiment of the present invention, the dispersion stabilizer may be any one or more selected from the group consisting of hydrogenated lecithin, cetaaryl alcohol, behenyl alcohol, glyceryl stearate, and polyhydroxystearic acid. , In this technology, hydrogenated lecithin was used as a dispersion stabilizer.

In one embodiment of the present invention, the average diameter of the ultrafine inorganic particles may be 0.001 to 0.1 μm.

In one embodiment of the present invention, it may further include an ester-based dispersion medium derived from coconut.

In addition, the present invention provides a UV-blocking functional cosmetic composition, and may include a dispersion as described above as an active ingredient.

In addition, the present invention provides a method for preparing a UV-blocking functional dispersion as described above, comprising the steps of dispersing an ultrafine inorganic particle dispersion in a coconut alkane oil dispersion medium; Mixing the dispersion medium with a dispersion stabilizer to form a primary dispersion; And forming a second dispersion by bead milling the first dispersion.

In one embodiment of the present invention, before the ultrafine inorganic particle dispersion is dispersed in a dispersion medium, surface treatment with any one or a combination of two of alumina and stearic acid; further includes do.

The present invention uses coconut oil, which is an alkane oil derived from a plant ingredient, as a dispersion medium, and shows excellent compatibility with conventional cosmetic materials without the existing safety problem pointed out, and provides excellent UV protection functional dispersion. Water can be provided.

The UV-blocking functional dispersion according to the present invention has excellent dispersion stability, thereby exhibiting a remarkably improved effect in maintaining the UV-blocking function and the blocking function for a long time.

In addition, according to the method for preparing the UV-blocking functional dispersion of the present invention, the dispersion of ultra-fine inorganic particles is stably dispersed, thereby minimizing cloudiness and protecting the skin from harmful UV rays without causing skin irritation. It can provide a highly effective UV protection functional dispersion.

1 is a graph showing the SPF correlation according to the dilution concentration of the UV blocking functional dispersion according to Example 1 (sample name: Tinoply V60S) of the present invention.
2 is a graph showing the PFA correlation according to the dilution concentration of the UV blocking functional dispersion according to Example 2 (sample name: Zinoply V60L) of the present invention.
Figure 3 shows the photocatalytic activity values of i) ultra-fine zinc oxide dispersion surface-treated with OTS, ii) non-coating zinc oxide and iii) ultra-fine zinc oxide dispersion to which hydrogenated lecithin is applied. It is a graph.
4 is a graph showing the photocatalytic activity level for 7 days of a dispersion to which zinc oxide and hydrogenated lecithin are applied without surface treatment according to Example 2 of the present invention.
5 is a graph showing the PFA correlation according to the dilution concentration of the UV blocking functional dispersion according to Example 3 (sample name: Zinoply V75L) of the present invention.

Hereinafter, the present invention will be described in detail. Unless otherwise defined, terms used in this specification should be interpreted as generally understood by those of ordinary skill in the relevant field. The drawings and embodiments of the present specification are intended to facilitate understanding and practice of the present invention by those of ordinary skill in the art, and in the drawings and embodiments, contents that may obscure the subject matter of the invention may be omitted, and the present invention is Is not limited to.

Technical terms and scientific terms used in the specification of the present invention have the meanings commonly understood by those of ordinary skill in the art, unless otherwise defined, and the present invention in the following description and accompanying drawings Descriptions of known functions and configurations that may unnecessarily obscure the gist of are omitted.

In addition, the singular form used in the specification of the present invention may be intended to include the plural form unless otherwise indicated in the context.

In addition, units used in the specification of the present invention are based on weight, and as an example, the unit of% or ratio means weight% or weight ratio.

The present invention provides a UV-blocking functional dispersion comprising an ultrafine inorganic particle dispersion and a coconut alkane oil dispersion medium and a dispersion stabilizer.

In the case of the coconut alkane oil, as a plant-derived oil, it is possible to secure safety by replacing cyclotetrasiloxane (D4) or cyclopentasiloxane (D5), which are known as dangerous components in silicone oil. However, when vegetable oil is used as a dispersion medium, a dispersion stabilizer is required for a dispersion having long-term dispersion stability.

The dispersion stabilizer may be any one or two or more selected from the group consisting of hydrogenated lecithin, cetaaryl alcohol, behenyl alcohol, glyceryl stearate, and polyhydrocystearic acid. The dispersion stabilizer is for uniform dispersion of the ultrafine inorganic particles in the coconut alkane oil dispersion medium, and may be included in an amount of 0.1 to 5% by weight, preferably 0.5 to 4% by weight, and even if the amount of inorganic particles is large It provides the effect of being homogeneously dispersed and maintained in the liquid continuous phase. In the case of inorganic particles, the content used has been limited due to the white turbidity that appears whiter as the content increases, but when the dispersion stabilizer is used in the coconut alkane dispersion medium according to the present invention, ultrafine inorganic particles are contained up to 73% by weight. Even so, it is possible to provide a UV-blocking functional dispersion with secured transparency by minimizing the cloudiness.

The ultrafine dispersoid and the dispersion stabilizer may preferably be included in a ratio of 5:1 to 35:1, and more preferably 10:1 to 30:1 based on the total weight of the dispersion. When included in the ratio of the above range, the ultrafine inorganic particles are not separated and can be stably dispersed without aggregation. However, it is not particularly limited thereto, and the ratio may be adjusted according to the type and content of the dispersion medium.

The inorganic particles may be any one or two or more selected from the group consisting of titanium dioxide, zinc oxide, iron oxide, copper oxide, aluminum oxide, cerium oxide, and zirconium oxide. Preferably, it may be titanium dioxide, zinc oxide, iron oxide or cerium oxide, and more preferably, a combination of two or more selected from titanium dioxide, zinc oxide, iron oxide and cerium oxide can provide various UV blocking effects according to wavelength. good.

The ultrafine inorganic particles may have an average diameter of 0.001 to 0.1 μm, and preferably 0.01 to 0.05 μm. In this case, the ultra-fine inorganic particles do not cause nano-toxicity in the skin and can be stably dispersed to act, which is effective for UV protection.

In one embodiment of the present invention, the ultrafine inorganic particles having a purity of 40% or more, preferably 60% or more, and more preferably 70% or more, may exhibit a high UV blocking index.

Typically, titanium dioxide or zinc oxide, which is not surface-treated, exhibits photocatalytic properties, but when used on the skin, it has a detrimental effect. Therefore, when the material is used as a cosmetic composition, it is necessary to treat it so that a photocatalytic reaction does not occur. Therefore, the ultrafine inorganic particle dispersion according to the present invention may be surface-treated with any one or a combination of two of alumina and stearic acid.

Specifically, for example, the ultrafine titanium dioxide may be surface-treated with any one or a combination of alumina and stearic acid. As described above, although the UV blocking effect increases as the content of the ultrafine inorganic particles increases, due to the photocatalytic properties of the inorganic particles, when it is contained in a high content without surface treatment, it is not suitable as a cosmetic material due to skin toxicity.

In this case, as the dispersoid surface treatment agent, alumina and/or stearic acid may be included in an amount of 0.1 to 20% by weight based on the total weight of the dispersion. It is effective to reduce photocatalytic activity, preferably contained in an amount of 1 to 15% by weight.

The inorganic particle dispersion may be included in an amount of 40 to 75% by weight, a coconut alkane oil in an amount of 20 to 40% by weight, and a dispersion stabilizer in an amount of 0.1 to 5% by weight. As a specific embodiment of the present invention, as an ultrafine inorganic particle dispersion, the ultrafine zinc oxide and/or titanium dioxide is 45 to 67% by weight, the coconut alkane oil is 25 to 35% by weight, and the dispersion stabilizer is 1 to 5 It may be a weight %, and hydrogenated lecithin may be included in the zinc oxide as 0.3 to 3% by weight. When included as a cosmetic ingredient while stably maintaining the photocatalytic activity level when included in the above content, the feeling of use may be excellently exhibited. However, the present invention is not limited thereto, and the content of the dispersion medium or the dispersion stabilizer may be adjusted according to the content of the ultrafine inorganic particles.

In a preferred embodiment of the present invention, the dispersion may further include a C12 to C18 ester-based dispersion medium derived from coconut. When an ester-based dispersion medium derived from coconut is used as an auxiliary dispersion medium, an auxiliary dispersion medium is additionally mixed with the dispersion in which the ultrafine inorganic particles and main dispersion medium are mixed, or after mixing the main dispersion medium and the auxiliary dispersion medium, It can also be used in the form of mixing and dispersing dispersoids. Alternatively, when two or more different dispersants are used, each powder is mixed in a separate dispersion medium and prepared in the form of a first dispersion and a second dispersion, and then used as a mixing mode, or even if two or more different dispersants are used, each powder After mixing, it may be used in the form of mixing each of them in a separate dispersion medium to prepare and mix in the form of a first dispersion and a second dispersion as described above. Specifically, for example, after mixing titanium dioxide and zinc oxide powder, a certain amount is dispersed in coconut alkane oil to prepare a first dispersion, and the remaining amount is mixed with an ester-based dispersion medium derived from coconut to obtain a second dispersion. After preparing, by mixing the first dispersion and the second dispersion, it is possible to obtain a dispersion for UV protection function according to the present invention.

The ester-based dispersion medium derived from coconut having a carbon number of C12 to C18 may be specifically coco-caprylate/caprate, but to improve the dispersibility of the ultrafine inorganic particles according to the present invention If it is for, it can be used without being limited thereto.

The present invention provides a cosmetic composition for sun protection comprising the above-described sun protection functional dispersion as an active ingredient. The formulation of the present invention may be prepared in any formulation conventionally prepared in the art, for example, solution, suspension, emulsion, paste, gel, cream, lotion, powder, soap, cleansing containing surfactant, oil, It may be formulated as a powder foundation, emulsion foundation, wax foundation, and spray, but is not limited thereto. In more detail, it may be prepared as a flexible lotion, nutritional lotion, nutritional cream, massage cream, essence, eye cream, cleansing cream, cleansing foam, cleansing water, pack, and the like. The sunscreen cosmetic composition according to the present invention may properly select the content of the sunscreen functional dispersion according to the formulation of the cosmetic material, but may contain 0.1 to 40% by weight in order to achieve the object of the present invention, preferably May be 5 to 30% by weight.

In addition, the present invention provides a method for preparing the above-described UV-blocking functional dispersion, the method comprising: dispersing an ultrafine inorganic particle dispersion in a coconut alkane oil dispersion medium; Mixing the dispersion medium with a dispersion stabilizer to form a primary dispersion; And forming a second dispersion by bead milling the first dispersion.

The viscosity of the first dispersion according to an embodiment of the present invention may be 1,000 to 20,000 cps. Preferably, it is 3,000 to 10,000 cps for long-term stability of the dispersion and for subsequent bead mill treatment.

Specifically, the above production method is described, by placing the ultrafine inorganic particle dispersoid into the coconut alkane oil dispersion medium and stirring, so that the dispersoid in the dispersion medium is uniformly mixed. In general, an Agi Mixer or Disper Mixer can be used. When a dispersion stabilizer is added to the dispersion medium in which the dispersoid is mixed to prepare a first dispersion, and the first dispersion is treated with a bead mill, pulverization or dissociation of the ultrafine particles is prevented due to the reaction and frictional force between the bead particles and the dispersant. Can happen.

The bead mill according to an embodiment of the present invention may be a basket mill or an ultrafine mill. Through the bead mill treatment, the primary dispersion is sufficiently stirred and dispersed to obtain a stably dispersed secondary dispersion. It is preferable to use a heavy bead with little impact, little abrasion, and if a bead of 1 mm or less is treated, an effect of improving the dispersibility of ultrafine inorganic particles can be expected. The bead mill treatment can be performed multiple times until a uniformly dispersed dispersion is obtained. At this time, the degree of dispersion can be checked through the glass plate while being dispersed with a bead mill, and the degree of dispersion is determined by confirming the uniformity of the particles. The bead mill treatment is continuously performed until the dispersed particle size becomes constant when checked with the naked eye.

When the secondary dispersion stably dispersed by bead mill treatment is used as a UV-blocking functional cosmetic, white cloudiness is reduced and transparency can be secured. The secondary dispersion is filtered to finally obtain a UV-blocking functional dispersion.

The ultrafine inorganic particle dispersion may further include a step of surface treatment with any one or a combination of two of alumina and stearic acid before being dispersed in a dispersion medium. As described above, the inorganic particle dispersion can improve the UV blocking function by reducing the photocatalytic activity through the surface treatment. In the case of a dispersion prepared through such a surface treatment step and a step of mixing and stirring the dispersion stabilizer, a cloudiness phenomenon may be significantly reduced and transparency may be increased.

Hereinafter, the present invention will be described in more detail through examples. The following examples correspond to one example for explaining the present invention in more detail, and the scope of the present invention is not limited by the examples.

Example 1. Preparation of UV-blocking functional dispersion using ultrafine titanium dioxide as a dispersant

Ultrafine titanium dioxide having an average particle diameter of 0.001 to 0.1 µm was added to the coconut alkane dispersion medium, and the mixture was first dispersed by stirring for 30 minutes with a Disper Mixer. Afterwards, the first dispersion mixed with polyhydroxystearic acid was treated with a first bead mill at 1800 rpm for second dispersion, and the second dispersion was third dispersed at 1800 rpm with a second bead mill, and the degree of dispersion through a glass plate. Was confirmed. Through a glass plate, a secondary bead mill treatment was performed until it was determined that the dispersed particle size was constant to prepare a uniformly dispersed UV blocking functional dispersion. The composition and content of the raw materials used in manufacture are as follows.

(1) Composition and content of raw materials

Table 1 shows the composition of a UV-blocking functional dispersion (Tinoply V60S) in which alumina and stearic acid surface-treated ultrafine titanium dioxide is used as a dispersant and coconut alkane oil is used as a dispersion medium.

(2) UV-B blocking index (SPF)

The stock solution of the dispersion of the present invention was diluted to a concentration of 10, 20, and 30% in a 20:1 mixture of coconut alkanes and coco-caprylate/caprate, and their UV protection index (SPF) was confirmed. The UV blocking index was measured with an SPF Analyser (SPF 290S, Optometrics), and the results are shown in Table 2, and FIG. 1 shows the correlation between the dilution concentration and the SPF result.

In the case of Tinoply V60S dispersion, as the concentration of dispersoid increased, the SPF level also increased in proportion to this. Their correlation coefficient was 0.9948, confirming that there was a correlation between the applied concentration of the dispersion and the SPF value (R2 = 0.9948). And when the dispersion concentration of 1% was applied, the SPF increased rate of about 1.65.

Example 2. Preparation of UV-blocking functional dispersion using ultrafine zinc oxide as a dispersant

A UV-blocking functional dispersion was prepared in the same manner as in Example 1, except that the composition and content of the raw materials were included as described in Table 3 below.

(1) Composition and content of raw materials

The applied raw materials and contents of the UV-blocking functional dispersion (Zinoply V60L) using ultrafine zinc oxide as a dispersant according to the present invention are shown in Table 3.

(2) UV-A blocking index (PFA)

After diluting the dispersion of Zinoply V60L of the above composition to 10, 20, 30%, their UV A blocking index (PFA) was measured, and the UV A blocking index and the applied concentration of the dispersion were determined according to the application concentration of the dispersion in Table 4, applied. The correlation between the concentration and PFA is shown in Figure 2.

As shown in FIG. 2, the correlation coefficient between the applied concentration of Zionply V60L and PFA (ultraviolet A blocking index) was confirmed to be 0.99, confirming that there is a correlation between the applied concentration of the dispersion and PFA. In addition, the increase in PFA with respect to the increase in the concentration applied to the dispersion was confirmed to be about 0.30, so that when the dispersion according to Example 2 of the present invention increased by 1%, the PFA of about 0.3 was increased.

(3) photocatalytic activity analysis

Ultrafine zinc oxide without surface treatment was applied to the UV-blocking functional dispersion with hydrogenated lecithin, and it was confirmed how much their photocatalyst levels differ from those of surface-treated zinc oxide. In other words, ultra-fine zinc oxide with OTS (Octyl triethoxysilane) surface-treated silicone oil is an ingredient that can be used as a cosmetic material as specified in the SCCS regulations. The photocatalytic activity values of i) ultrafine zinc oxide dispersions surface-treated with OTS, ii) non-coating zinc and iii) ultrafine zinc oxide dispersions applied with hydrogenated lecithin were compared and confirmed. .

The photocatalytic activity of the sample to be analyzed was confirmed through the degree of decomposition of the methylene blue reagent according to the photocatalyst. This is to evaluate how much photocatalytic activity the sample to be measured has by adsorbing the methylene blue solution on the sample to check the photocatalytic properties, irradiating light for a certain period of time, and then confirming the decrease in the concentration of the methylene blue solution adsorbed on the sample. It is an analysis method.

Each UV-blocking functional dispersion was prepared by using the three different types of ultrafine zinc oxide as a dispersant at the component mixing ratio specified in Table 3, and the photocatalytic reactions in the three different dispersions are shown in FIG.

The absorbance (ABS) of the dispersion [Zinc(none)] to which the surface-treated zinc oxide of FIG. 3 was applied was 1.2, and after 60 minutes, it decreased to 0.72, and the photocatalytic activity was about 40% (1.2-0.72 = 0.48, 0.48 / 1.2 Х 100 = 40%). As a result of confirming the absorbance of the zinc oxide dispersion applied with OTS surface-treated and the zinc oxide dispersion applied with hydrogenated lecithin in this way, the absorbance after 1 hour of their photocatalytic experiment was 0.96. That is, it was confirmed that the photocatalytic activity in the two different dispersions was at the level of 20% (1.2-0.96 = 0.24, 0.24 / 1.2 Х 100 = 20%), and their photocatalyst level was half of that of the zinc oxide applied dispersion without surface treatment. Was evaluated as a level. These results indicate that the dispersion applied with unsurfaced zinc oxide and hydrogenated lecithin is similar to the photocatalytic level of the surface-treated zinc oxide application dispersion with silicone oil (OTS).

The results of the photocatalytic activity level of the dispersion (sample name: Zinoply V60L) to which the surface-treated zinc oxide and hydrogenated lecithin are applied are shown in FIG. 4 for 7 days. The absorbance for one week of the UV-blocking functional dispersion according to Example 2 of the present invention was 0.85 to 0.89, and it was confirmed that the photocatalytic activity was maintained at a constant level.

Example 3. Preparation of UV-blocking functional dispersion using ultrafine zinc oxide as a dispersant

A UV-blocking functional dispersion was prepared in the same manner as in Example 1, except that the composition and content of the raw materials were included as described in Table 3 below.

(1) Composition and content of raw materials

The raw material composition and content of this dispersion are shown in Table 5.

(2) UV-A blocking index (PFA)

In the same manner as in Example 2, the dispersion of Zinoply V75L of the above composition was diluted to 10, 20, 30%, and then their UV A blocking index (PFA) was measured, and the UV A blocking index and dispersion according to the applied concentration of the dispersion Table 6 shows the applied concentration of water, and Fig. 5 shows the correlation between the applied concentration and PFA.

As shown in FIG. 5, the correlation coefficient between the applied concentration of Zionply V75L and PFA was confirmed to be 1.00, confirming that there is a correlation between the applied concentration of the dispersion and PFA. In addition, the increase in PFA relative to the increase in the applied concentration of the dispersion was found to be about 0.53, and it can be seen that when the dispersion concentration according to Example 3 of the present invention increases by 1%, PFA of about 0.5 increases. This is a value higher than the PFA increase of 0.3 according to Example 2, which is a result of including a high content of zinc oxide, and when hydrogenated lecithin is used as a dispersion stabilizer, the ultraviolet ray according to the present invention can stably disperse zinc oxide in a high content. It is due to the excellent effect of the dispersion for blocking function.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and it is possible to implement various modifications within the scope of the claims, the description of the invention, and the accompanying drawings. It is natural to fall within the scope of the invention.

Claims (9)

Ultra-fine inorganic particle dispersion, a coconut alkane oil dispersion medium, and a UV-blocking functional dispersion comprising a dispersion stabilizer. The method of claim 1,
The inorganic particles are any one or two or more selected from the group consisting of titanium dioxide, zinc oxide, iron oxide, copper oxide, aluminum oxide, cerium oxide, and zirconium oxide. The method of claim 1,
The ultra-fine inorganic particle dispersion is surface-treated with any one or a combination of two of alumina and stearic acid, a UV-blocking functional dispersion. The method of claim 1,
The ultra-fine inorganic particle dispersion is 40 to 75% by weight, coconut alkane oil is contained in 20 to 40% by weight, dispersion stabilizer is 0.1 to 5% by weight, UV blocking functional dispersion. The method of claim 1,
The dispersion stabilizer is any one or two or more selected from the group consisting of hydrogenated lecithin, cetaaryl alcohol, behenyl alcohol, glyceryl stearate, and polyhydroxystearic acid. The method of claim 1,
The average diameter of the ultra-fine inorganic particles is 0.001 to 0.1 ㎛, UV blocking functional dispersion. The method of claim 1,
A UV-blocking functional dispersion further comprising an ester-based dispersion medium derived from coconut. A cosmetic composition for sunscreen comprising the dispersion according to any one of claims 1 to 7 as an active ingredient. Dispersing the ultrafine inorganic particle dispersion in a coconut alkane oil dispersion medium;
Mixing the dispersion medium with a dispersion stabilizer to form a primary dispersion; And
A method for producing a UV-blocking functional dispersion comprising; forming a second dispersion by bead milling the first dispersion.

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