KR101388641B1 - Oil-in-water type of semi-transparent cosmetic composition for blocking ultraviolet - Google Patents

Abstract

The present invention relates to a sunscreen cosmetic composition in the form of a translucent oil-in-water emulsion.
The present invention is to provide a semi-transparent formulation by adjusting the refractive index difference between the water phase component and the oil phase component in the oil-in-water emulsion-containing cosmetic composition of the oil-in-water emulsion containing an organic UV-blocking component to increase the preference of the consumer layer, the refractive index difference control Due to the conventional high refractive index to reduce the whitening of the white lifting phenomenon when applying the skin is possible to express a clear skin without turbidity. Furthermore, when the skin is applied, a refreshing feeling and a cooling feeling can be given at the same time to meet the preferences of the consumers who are suitable for summer use or have a lot of sweat.

Description

OIL-IN-WATER TYPE OF SEMI-TRANSPARENT COSMETIC COMPOSITION FOR BLOCKING ULTRAVIOLET}

The present invention relates to a cosmetic composition for blocking UV rays in the form of a translucent oil-in-water emulsion, and more particularly, in the oil-in-water emulsion-containing cosmetic composition containing an organic UV-blocking component, the refractive index difference between the aqueous phase and the oil phase component By adjusting, the whitening phenomenon of whitening when the skin is applied is reduced, thereby providing a clear skin expression without white turbidity and a cosmetic composition for sunscreen having a translucent formulation.

Ultraviolet rays also play a positive role in promoting the synthesis of vitamin D, but are recognized as a major cause of skin aging due to negative effects such as erythema, edema, freckles or skin cancer.

In detail, the ultraviolet rays are divided into UVA, UVB, and UVC depending on the wavelength. UVA has a wavelength of 320 to 4000 nm, penetrates into the dermis of the skin, promotes skin cancer, wrinkles and melanin formation, skin aging and skin It is known to cause irritation.

UVB has a wavelength of 290-320 nm and is known to penetrate the epidermis of the skin, causing erythema, freckles, and edema.

UVC has a wavelength of 2000-290 nm and disappears as it passes through the ozone layer in the stratosphere and does not reach the surface, but it is known that some ozone layer is destroyed as a result of environmental pollution, but it reaches a very small amount but increases the incidence of skin cancer. have.

Accordingly, a lot of UV blocking products have been developed recently to prevent the occurrence of skin diseases caused by UV rays. Since UV rays reach the skin regardless of the season, UV protection products must be used from time to time, so the market expands day by day. It is expected to grow.

Sunscreens used in the cosmetics industry can be broadly divided into organic and inorganic UV blockers.

The organic ultraviolet blocker is to block ultraviolet rays by extinguishing the penetration of ultraviolet rays into the skin by the ultraviolet absorption action, ethyl hexyl methoxycinnamate, ethyl hexyl salicylate, octocrylene, butyl methoxy dibenzoyl methane and 3, It comprises a component selected from the group consisting of 4-methylbenzylidene camphor.

In addition, the inorganic UV blocker prevents ultraviolet rays from penetrating into the skin by physical scattering, and titanium dioxide, zinc oxide, and the like are typical.

In general, sunscreen products on the market are used in combination with the inorganic ultraviolet blocker or organic ultraviolet blocker, and the product form has been developed as a cream, lotion, spray formulation.

In sunscreen products, most water-in-oil emulsions use surfactants in the oil phase and the water phase to increase the surfactant activity of the two phases, thereby achieving stability of the formulation and helping to mix two phases.

However, due to the phenomenon that cream and lotion formulations due to water-in-oil emulsions are poor in transparency and whitening phenomenon due to soaping is outstanding, they do not satisfy the taste of modern people who value preference trends in addition to product functionality.

Accordingly, the present inventors have tried to improve the conventional problems, as a result, in the oil-in-water emulsion-type cosmetic composition for the oil-in-water emulsion containing the organic UV-blocking component, it looks external to the UV-blocking product by controlling the refractive index difference between the aqueous phase component and the oil phase component The present invention was completed by confirming that transparency can be maximized by providing transparency.

It is an object of the present invention to provide a cosmetic composition for sunscreen in the form of a translucent oil-in-water emulsion.

Another object of the present invention is to provide a translucent sunscreen cosmetic composition by adjusting the refractive index difference between the water phase component and the oil phase component in the sunscreen emulsion composition containing an organic sunscreen component.

In order to achieve the above object, the present invention provides an oil-in-water emulsion-type sunscreen cosmetic composition containing an organic sunscreen component that satisfies the following physical properties (1).

(1) Δ | refractive index of aqueous component-refractive index of oil phase component | = 0.070 or more and less than 0.096

The sunscreen cosmetic composition of the present invention is a translucent formulation.

In addition, in the oil-in-water emulsion-type cosmetic composition for sunscreen according to the present invention, an aqueous phase component is selected from the group consisting of glycerin, 1,3-butylene glycol, dipropylene glycol and propylene glycol alone or in combination of two or more thereof. It is characterized by containing 5 to 25% by weight of polyol in the form to increase the refractive index of the aqueous phase component.

Further, in the aqueous phase component, carbomers, acrylates / C ₁₀ ~C ₃₀ alkyl acrylate cross polymer, ammonium acryloyl-dimethyl taurate / beuyipi copolymers and hydroxyethyl acrylate / sodium acryloyl dimethyl taurate 0.05 to 0.5% by weight of water-soluble polymer alone or in combination of two or more selected from the group consisting of copolymers is further contained.

The sunscreen cosmetic composition of the oil-in-water emulsion type of the present invention is characterized by containing 9 to 20% by weight of silicone oil selected from dimethicone or cyclopentasiloxane in the oil phase component to lower the refractive index of the oil phase component.

The oil phase component further contains 1 to 5% by weight of an emollient oil alone or in combination of two or more selected from the group consisting of dicapryl carbonate, capric caprylic triglyceride and isodecyl neopentanoate. will be.

Furthermore, the sunscreen cosmetic composition of the present invention by containing 5 to 15% by weight of C ₂ ~ C ₄ linear or pulverized alcohol, it can provide a cooling and cooling feeling during application due to rapid evaporation.

According to the present invention, in the oil-in-water emulsion-type cosmetic composition containing an organic UV-blocking component, in the semi-transparent UV-blocking by controlling the difference in refractive index between the aqueous phase and the oil phase while minimizing the content of the conventionally used emulsifier Cosmetic compositions can be provided.

The translucent sunscreen cosmetic composition of the present invention is capable of expressing clean skin without turbidity by reducing whitening phenomenon when the skin is applied due to the high refractive index of the conventional product, and can also provide a refreshing feeling and a cooling feeling, and at the same time, a translucent formulation Can satisfy consumer preferences.

1 is a photograph visually comparing the transparency of the translucent UV protection cosmetic composition of Example 3 of the present invention compared to Comparative Example 2,
FIG. 2 is a photograph comparing the semi-transparent UV blocking cosmetic composition of Example 3 of the present invention, compared to Comparative Example 2. FIG.

Hereinafter, the present invention will be described in more detail.

The present invention provides a cosmetic composition for UV protection in the form of oil-in-water emulsion containing organic sunscreen ingredients.

That is, oil-based components such as organic sunscreen ingredients and ester oils are uniformly dispersed in the aqueous phase to form an oil moisturizing film to maintain moisture, and a daycare oil-in-water type emulsion composition having a sunscreen effect. to be.

Thus, the sunscreen cosmetic composition of the oil-in-water emulsion type of the present invention is characterized by satisfying the following physical properties (1).

(1) Δ | refractive index of aqueous component-refractive index of oil phase component | = 0.070 or more and less than 0.096

In the oil-in-water emulsion-type cosmetic composition of the present invention, the aqueous phase component and the oil phase of the physical property (1) are controlled by adjusting the fraction between the composition capable of increasing the refractive index of the aqueous phase component and the composition capable of lowering the refractive index of the oil phase component. The difference in refractive index between the components can be adjusted.

At this time, if the refractive index difference between the aqueous phase component and the oil phase component (△ | refractive index of the aqueous phase component-the refractive index of the oil phase component) is less than 0.070, the oil phase component fraction is increased, the stability of the formulation is lowered, and if the refractive index difference is 0.096 or more, the refractive index is If high, whitening is caused when the skin is applied.

In addition, the sunscreen cosmetic composition of the oil-in-water emulsion type of the present invention is to satisfy the refractive index difference of the physical property (1).

Thus, the sunscreen cosmetic composition of the oil-in-water emulsion containing the organic sunscreen component of the present invention is provided in a translucent formulation that satisfies the physical properties (1).

In particular, by controlling the refractive index difference between the water phase component and the oil phase component of the physical property (1), due to the high refractive index of the conventional sunscreen products to reduce the whitening phenomenon of whitening when applying the skin, it is possible to express clean skin without clouding.

Hereinafter, it will be described in detail for each composition of the sunscreen cosmetic composition of the oil-in-water emulsion type containing the organic sunscreen component of the present invention.

The sunscreen cosmetic composition of the oil-in-water emulsion type of the present invention is selected from the group consisting of glycerin, 1,3-butylene glycol, dipropylene glycol, and propylene glycol having a high refractive index in an aqueous phase, that is, purified water. The refractive index of the said water phase component can be raised by containing 5-25 weight% of polyols of the above-mentioned mixed form.

At this time, if the polyol content is less than 5% by weight, the effect of the refractive index control is insufficient and transparency is reduced, while if it exceeds 25% by weight, it is difficult to fit the consumer taste with a sticky feeling.

In addition, the aqueous phase component includes carbomer, acrylate / C _10- C ₃₀ alkyl acrylate crosspolymer, ammonium acryloyl-dimethyltau, which can increase the stability of the formulation by increasing the emulsion phase after emulsification with the increase of the aqueous phase. 0.05-0.5 weight% of single or 2 or more types selected from the acrylate type or water-soluble polymers, such as a rate / VP copolymer and hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer, are contained.

In addition, the sunscreen cosmetic composition of the oil-in-water emulsion type of the present invention as a composition that can lower the refractive index of the oil phase component, it contains 9 to 20% by weight of silicone oil selected from dimethicone or cyclopentasiloxane.

If the silicone oil component is less than 9% by weight, the effect of lowering the refractive index of the oil phase component is insignificant, so that the problem of whitening due to the high refractive index of the final product is not solved, and if it exceeds 20% by weight, the content of the oil phase component is increased. Due to this, the stability of the formulation is disadvantageous.

In addition, the oil phase component is a component that can maintain the skin moisturizing, dicapryl carbonate, capric caprylic triglyceride and isodecyl neopentanoate selected from the group consisting of single or two or more It contains 1 to 5% by weight of emollient oil.

Furthermore, the sunscreen cosmetic composition of the oil-in-water emulsion type of the present invention contains a maximum of 15% by weight of C ₂ ~ C ₄ linear or pulverized alcohol, more preferably as a component that can give a cooling and cooling feeling, more preferably It contains 5-15 weight%. By uniformly emulsifying the alcohol component, it is possible to provide a cooling and cooling feeling during application due to rapid evaporation. Thus, by providing a refreshing feeling to the skin heated in the summer fire can meet the preference of the consumer group suitable for summer use or sweating. At this time, when it exceeds 15% by weight, the viscosity decrease and the alcohol odor of the composition is strong, which is not preferable.

The organic sunscreen ingredient used in the present invention may be used as long as it is a food ingredient notice published by the Food and Drug Administration. In an embodiment of the present invention, ethylhexylmethoxycinnamate or ethylhexylsalicylate is used. At this time, the preferable content of the organic UV blocking component is contained in 5 to 15% by weight. The content range is determined in a range capable of minimizing irritation to sensitive skin when applying UV protection and skin.

In addition to the above composition, it may further contain a flavor, thickener, and the like that can be conventionally contained in the cosmetic composition.

UV-protective cosmetic composition of the oil-in-water emulsion-type emulsion of the present invention characterized by the above composition is basically a combination of the refractive index of each material having a minimum within the specific refractive index range to minimize the use of emulsifiers, and Figure 1 and As can be seen in FIG . 2 , the transparency of the formulation is maintained as a semitransparent form.

More specifically, Figure 1 is a photograph comparing the transparency of the UV-blocking cosmetic composition prepared in Example 3 (left) and Comparative Example 2 (right) of the present invention, of the cosmetic composition for UV-blocking of Example 3 In this case, formulations of the translucent gel type can be identified.

Figure 2 is a photograph comparing the UV-blocking cosmetic composition prepared in Example 3 (left) and Comparative Example 2 (right), the transparency of the product is clearly distinguished.

Thus, the sunscreen cosmetic composition of the present invention is provided as a semi-transparent formulation to increase the preference of the consumer layer, by reducing the whitening phenomenon of whitening when applying the skin due to the conventional high refractive index by adjusting the refractive index difference is clear skin without white cloud It is possible.

In addition, the sunscreen cosmetic composition of the oil-in-water emulsion-type emulsion containing the organic sunscreen component of the present invention is a day care product that can realize the daily UV and moisturizing maintenance in everyday life by simultaneously giving a cooling and cooling feeling when applying the skin, Suitable for summer use or sweaty consumers can meet the preferences.

Hereinafter, the present invention will be described in more detail with reference to Examples.

This embodiment is intended to illustrate the present invention in more detail, and the scope of the present invention is not limited to these examples.

<Examples 1-2> Preparation of Cosmetic Composition for UV Protection

As shown in Table 1 below, the aqueous phase A phase was precisely weighed and weighed in a container, and then a thickener was uniformly dispersed in an aqueous phase using an Agi mixer to prepare a base A phase.

Thereafter, the phase A component B phase and the phase C component which can provide a cooling and cooling feeling during application due to rapid evaporation were weighed and uniformly mixed.

The mixture was heated to a temperature of 70 to 80 ° C., and the phase D of the oil phase component and the organic ultraviolet ray blocking component E phase were mixed, and uniformly dispersed using a homomixer while gradually mixing the phase A of the prepared aqueous phase component to form an emulsion. Thereafter, the phase F was weighed and deflected, and then the contents were checked for physical properties and then filled in a container. The numerical value unit of the composition shown in Table 1 is weight%.

<Comparative Examples 1 and 2> Preparation of Cosmetic Composition for UV Protection

Except that it was carried out in the components and contents shown in Table 1, was carried out in the same manner as in Example 1 to prepare a cosmetic composition for sunscreen.

The cosmetic composition for sunscreens prepared in Examples 1 to 2 and Comparative Examples 1 to 2 was prepared by preparing a component having the same content in order to increase the refractive index of the aqueous phase on the aqueous phase component A, so as to lower the refractive index of the oil phase component. Among the phase E, it was suggested that by controlling the silicone oil component content of cyclopentasiloxane, the refractive index of the entire composition can be adjusted to the desired range.

That is, in Comparative Example 3, where the difference between the refractive index of the aqueous phase component and the refractive index of the oil phase component is the lowest, the silicone oil component content of cyclopentasiloxane was the highest content in the cosmetic composition for sunscreen, and the aqueous phase component was increased as the content thereof increased. It was confirmed that the difference in refractive index between the and oil phase components was small.

Thus, the high refractive index of the oil phase component can be adjusted according to the optimum range of the content of the silicone oil component of the cyclopentasiloxane, the content range is optimized.

Experimental Example 1 Physical Property Test and Visual Inspection

In order to test the change in physical properties of the UV-blocking cosmetic composition prepared in Examples 1 and 2 and Comparative Examples 1 and 2 by using a viscometer (Brookfield Viscometer LVT96540), spindle No. The viscosity of the composition was measured under conditions of 4 and a spin rate of 6 rpm.

In addition, in order to compare the properties, after leaving the composition for 1 day, the specificity of each temperature was visually evaluated. Each was evaluated for a week and the results are shown in Table 2 below.

As shown in Table 2, the UV-blocking compositions of Examples 1 and 2, in which the difference between the refractive indices was controlled to 0.0883 and 0.0931, showed semitransparency, but the transparency of the comparative example 1 having a difference between the refractive indices of 0.096 or more was significantly reduced.

In addition, in Comparative Example 2 in which the difference between the refractive indexes of the aqueous phase component and the oil phase component was 0.0705, the silicone oil fraction of cyclopentasiloxane was increased in the oil phase component, thereby significantly reducing the stability of the formulation.

<Experiment 2> Activity test of the cosmetic composition for UV protection using HPLC

In order to confirm the uniformly dispersed state of the sunscreen cosmetic composition prepared in Example 1, a certain amount of the sample was removed and compared with the standard material through HPLC. At this time, HPLC analysis conditions using a reverse phase column (Symmetry C ₁₈ 5㎛ × 4.6 × 150mm), the mobile phase is a mixture of acetonitrile and water, the detection was carried out at 305nm, the flow rate is 1.5ml / min and detection time 10 The results are shown in Table 3 below under running conditions for minutes.

As confirmed in Table 3, the cosmetic composition for sunscreen in Example 1 showed an excellent preservation rate compared to the standard sample, it was confirmed the even dispersion of the organic sunscreen ingredients. The preservation rate of Table 3 is generally 90 to 105% of the allowance of the functional cosmetics, it is determined that the tolerance exceeds or low based on 100%.

&Lt; Example 3 >

Table 4 was carried out in the same manner as in Example 1, except that the composition and content shown in the following to prepare a cosmetic composition for sun protection. The numerical value unit of the composition shown in Table 4 is weight%.

&Lt; Comparative Example 3 &

Table 4 was carried out in the same manner as in Example 1, except that the composition and the content shown in Table 1 to prepare a conventional cosmetic composition for sunscreen. The refractive index difference between the water phase component and the oil phase component of the composition was not measured because it is a general emulsifying system used to increase the stability of the formulation regardless of the refractive index.

Experimental Example 3 Transparency Measurement

As shown in Table 4, the transparency of the oil-in-water emulsion was evaluated for the cosmetic composition for sunscreen of Example 3 and Comparative Example 2, the refractive index difference between the water phase component and the oil phase component is satisfied in a similar range.

Figure 2 is confirmed by the appearance of a very transparent gel type of the cosmetic composition for sunscreen of Example 3 of the present invention compared to Comparative Example 3 of the general emulsifier type made using a general oil-in-water emulsion system.

Experimental Example 4 Physical Property Test and Visual Inspection

With respect to the cosmetic composition for sunscreen of Example 3 and Comparative Example 2 prepared as shown in Table 4, the refractive index difference between the aqueous phase component and the oil phase component is fixed in a similar range and the refractive index of the aqueous phase component or oil phase component is adjusted. In order to test the change of physical properties with respect to the main factor, using a viscometer (Brookfield Viscometer LVT96540), spindle No. The viscosity of the composition was measured under conditions of 4 and a spin rate of 6 rpm. Through a change

In addition, in order to compare the properties, after leaving the composition for 1 day, the specificity of each temperature was visually evaluated. Each was evaluated for a week and the evaluation results are shown in Table 5 below.

From the results of Table 5, even if the refractive index difference between the aqueous phase component and the oil phase component is satisfied in a similar range, when contained in the optimum content between the component that can increase the refractive index of the aqueous phase component and the component that can lower the refractive index of the oil phase component, It was confirmed that the physical properties of the stability and transparency of the cosmetic formulation can be met.

As described above, in the oil-in-water emulsion-containing cosmetic composition of the oil-in-water emulsion-type containing an organic sunscreen component, by adjusting the refractive index difference between the water phase component and the oil phase component, a translucent sunscreen cosmetic composition was provided.

The translucent sunscreen cosmetic composition of the present invention is capable of expressing clean skin without cloudiness by reducing the whitening phenomenon of whitening when the skin is applied due to the high refractive index of the conventional product, and providing a refreshing and cooling feeling to the skin heated by heat. It can meet the preference of consumers who are suitable for use or sweaty.

In addition, unlike conventional cream and lotion formulations, the translucent gel type formulations can satisfy the preference of modern people.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications belong to the appended claims.

Claims (6)

Cosmetic composition for UV protection in the form of oil-in-water emulsion containing an organic sunscreen component characterized by satisfying the following physical properties (1):
(1) Δ | refractive index of aqueous component-refractive index of oil phase component | = 0.070 or more and less than 0.096 The method of claim 1, wherein the aqueous phase component contains 5 to 25% by weight of polyol, alone or in combination of two or more selected from the group consisting of glycerin, 1,3-butylene glycol, dipropylene glycol and propylene glycol. The cosmetic composition for sunscreen, characterized in that to increase the refractive index of the aqueous phase component. The method of claim 1, wherein in the water phase component, carbomer, acrylate / C _10- C ₃₀ alkyl acrylate crosspolymer, ammonium acryloyl-dimethyltaurate / V copolymer and hydroxyethyl acrylate / sodium acryl The cosmetic composition for sunscreen, characterized in that 0.05 to 0.5% by weight of a water-soluble polymer in the form of a single or two or more selected from the group consisting of dimethyl taurate copolymer. The cosmetic composition for sunscreen according to claim 1, wherein the oil phase component contains 9 to 20% by weight of a silicone oil selected from dimethicone or cyclopentasiloxane to lower the refractive index of the oil phase component. According to claim 1, 1 to 5% by weight of the emollient oil alone or in combination of two or more selected from the group consisting of dicapryl carbonate, capric caprylic triglyceride and isodecyl neopentanoate to the oil phase component The sunscreen cosmetic composition, characterized in that it contains. The cosmetic composition for sunscreen according to claim 1, wherein 5 to 15% by weight of C ₂ to C ₄ straight-chain or pulverized alcohol is contained in the cosmetic composition for sunscreen to provide a cooling feeling.

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