UV protection cosmetic composition having color emulsion properties

Abstract

The present invention relates to a UV protection cosmetic composition having a colored emulsion property comprising a high content of an organic sunscreen and a silicone surfactant obtained by cross-linking polydimethylsiloxane to which polyethylene glycol is added and polypropylene glycol. The cosmetic composition of the present invention can also exhibit a stable colored emulsion property when containing a high content of an organic sunscreen.

Description

Technical Field

[0001] The present invention relates to an ultraviolet protection cosmetic composition having stable color emulsion properties expressing structural color. Background Art

[0002] Ultraviolet rays from sunlight are the main cause of erythema, edema, freckles or skin cancer on the skin, and therefore, many studies on various skin diseases caused by ultraviolet rays have been actively conducted in recent years.

[0003] In general, ultraviolet rays are classified into UV-A, UV-B, and UV-C according to their wavelengths, with wavelengths of 320nm to 400nm being classified into UV-A, wavelengths of 280nm to 320nm being classified into UV-B, and wavelengths of 200nm to 280nm being classified into UV-C. UV-A penetrates into the dermis of the skin to cause skin cancer, promotes the formation of wrinkles and melanin, thereby causing skin aging and skin irritation, and UV-B penetrates into the epidermis of the skin to cause erythema, freckles, or edema. UV-C passes through the ozone layer and disappears without reaching the ground surface.

[0004] In order to prevent or improve skin diseases associated with sun exposure as described above, consumers are increasingly interested in UV protection products. As a result, UV protection products with various UV protection factors (SPF) have appeared on the market. Generally, UV protection products include inorganic sunscreens such as titanium dioxide or zinc oxide or organic sunscreens such as ethylhexyl methoxycinnamate, ethylhexyl salicylate, octocrylene, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine or diethylaminohydroxybenzoyl hexyl benzoate in order to show a higher SPF value.

[0005] However, most of the organic sunscreens used in UV protection products are oil-soluble components with a relatively high refractive index, and inorganic sunscreens are opaque powder components, so general UV protection products (sunscreens) have an opaque emulsion appearance.

[0006] On the other hand, a chromatic emulsion is an emulsion that matches the refractive index of the water phase and the oil phase of the composition, is transparent, and expresses structural color according to the difference in light dispersion energy between the water phase and the oil phase (J. Am. Chem. Soc., Chromatic Emulsion, 1922, 44 (1), pp71-74). In the past, many attempts have been made to study cosmetics using chromatic emulsions, but so far no groundbreaking breakthrough has been found for preparing a UV-blocking cosmetic composition that can block UV rays in daily life and has stable chromatic emulsion properties. Summary of the invention

[0007] Technical issues

[0008] The present inventors have conducted research to develop a UV protection cosmetic composition that is transparent and has stable colored emulsion properties that express structural color, as compared to conventional UV protection cosmetic compositions that have an opaque appearance. As a result, they have confirmed that when a specific amount of an organic sunscreen agent is added to the cosmetic composition and a silicone surfactant is excluded as a specific component, the formulation has excellent stability and exhibits colored emulsion properties, thereby completing the present invention.

[0009] Therefore, an object of the present invention is to provide a cosmetic composition comprising an organic sunscreen agent within a specific content range and a silicone surfactant excluding PEG-15 / lauryl dimethicone crosspolymer, thereby showing a stable colored emulsion property that expresses structural color without showing white turbidity.

[0010] Means of solving problems

[0011] As a means for solving the above-mentioned problems, the present invention provides a UV protection cosmetic composition comprising an organic sunscreen agent and a silicone surfactant.

[0012] In addition, the present invention provides a method for preparing a UV protection cosmetic composition, which comprises the step of mixing an organic sunscreen agent and a silicone surfactant.

[0013] Next, the structure of the present invention will be described in detail.

[0014] The present invention provides an anti-ultraviolet cosmetic composition, which includes an oil phase and a water phase. The oil phase includes 10 to 40 parts by weight of an organic sunscreen and 1 to 10 parts by weight of a silicone surfactant based on the weight of the entire composition. The silicone surfactant is obtained by cross-linking polydimethylsiloxane to which polyethylene glycol is added and polypropylene glycol.

[0015] In the present invention, the organic sunscreen is selected from the group consisting of ethylhexyl methoxycinnamate, isoamyl p-methoxycinnamate, ethylhexyl salicylate, octocrylene, polysilicone-15, homosalate, 2-phenyl-5-benzimidazole sulfonic acid, bis-ethylhexyloxyphenol methoxyphenyl triazine, butyl methoxydibenzoylmethane, diethylaminohydroxybenzoyl hexyl benzoate, ethylhexyl triazone, 4-methylbenzylidene camphor, benzophenone-3, diethylhexyl butyramido triazone and disodium phenyl dibenzimidazole tetrasulfonate, but is not limited thereto. As for the organic sunscreen, all organic substances conventionally used for ultraviolet protection can be applied.

[0016] In the present invention, based on the weight of the total cosmetic composition, when 10 to 40 parts by weight of an organic sunscreen is included, excellent UV protection effect and use feeling can be provided. When the organic sunscreen included in the above composition is less than 10 parts by weight, sufficient UV protection effect cannot be shown, and when it exceeds 40 parts by weight, skin irritation or oily use feeling may be caused. For example, relative to the weight of the total composition, the organic sunscreen may be included in the following weights: 10 to 35 parts by weight, 10 to 30 parts by weight, 10 to 25 parts by weight, 10 to 20 parts by weight, 15 parts by weight to 35 parts by weight, 15 parts by weight to 30 parts by weight, 15 parts by weight to 25 parts by weight, 15 parts by weight to 20 parts by weight, 20 to 35 parts by weight, 20 to 30 parts by weight, 25 to 35 parts by weight, 25 to 30 parts by weight.

[0017] The present invention is characterized in that the above-mentioned silicone surfactant excludes PEG-15 / lauryl dimethicone cross-linked polymer, which is a silicone surfactant obtained by cross-linking polydimethylsiloxane to which 1 to 30 moles of polyethylene glycol (PEG) are added and 1 to 30 moles of polypropylene glycol (PPG).

[0018] In a specific example, the silicon-based surfactant may be PEG-12 polydimethylsiloxane cross-linked polymer / PPG-20 cross-linked polymer, but is not limited thereto.

[0019] In the following examples, it was confirmed that the cosmetic composition (Comparative Example 2) using PEG-15 / lauryl dimethicone crosspolymer as a silicone surfactant had a decreased formulation stability under high temperature (50° C.), such as layer separation.

[0020] In the present invention, based on the total weight of the composition, the above-mentioned silicon-based surfactant may be included in an amount of 1 to 10 parts by weight, such as 1 to 8 parts by weight, 1 to 6.5 parts by weight, 1 to 5 parts by weight, 3 to 10 parts by weight, 3 to 8 parts by weight, 3 to 5 parts by weight, 4 to 10 parts by weight, 4 to 8 parts by weight, 4 to 6.5 parts by weight, and 4.5 to 6.3 parts by weight. In the present invention, when the content of the silicon-based surfactant deviates from the above range, the refractive index of the oil phase is affected, and there is a problem in the transparency of the dosage form.

[0021] In the present invention, the cosmetic composition may further include a nonionic surfactant. The nonionic surfactant is selected from the group consisting of polyether modified silicon, polyglycerol modified silicon, glycerol fatty acid ester, polyglycerol fatty acid ester, polyether fatty acid ester, sorbitan fatty acid ester and sugar fatty acid ester. More specifically, it may be lauryl PEG-9 polydimethylsiloxyethyl polydimethicone, polyglycerol 6 polyricinoleate, sorbitol sesquioleate, sorbitol isostearate, PEG-9 polydimethylsiloxyethyl polydimethicone, PEG-10 polydimethicone or cetyl PEG / PPG-10 / 1 polydimethicone, but is not limited thereto.

[0022] In a specific example, the nonionic surfactant may be polyether-modified silicon, such as lauryl PEG-9 polydimethylsiloxyethyl polydimethicone.

[0023] In the present invention, when the above-mentioned UV protection cosmetic composition includes a silicone surfactant obtained by cross-linking polydimethylsiloxane to which polyethylene glycol is added and polypropylene glycol, and the above-mentioned non-ionic surfactant, excellent compatibility is achieved by the combined use of the above-mentioned silicone surfactant and the non-ionic surfactant, showing a transparent dosage form and being able to express structural color.

[0024] In the present invention, based on the total composition weight, the nonionic surfactant is included in an amount of 0.1 to 10 parts by weight, for example, 0.5 to 5 parts by weight, 1 to 3 parts by weight, 0.1 to 5 parts by weight, or 0.1 to 3 parts by weight.

[0025] The composition of the present invention includes an oil phase, and the oil phase includes the organic sunscreen and a silicone surfactant. In the present invention, the oil phase also includes a nonionic surfactant, oil or wax. As for the oil and wax, any oil and wax commonly used as a cosmetic component in the art can be used. For example, as the oil, silicone oil, ester oil, triglyceride oil, hydrocarbon oil or vegetable oil can be used, and more than one of these components can be used in combination as needed.

[0026] For example, as the silicone oil, silicone fluid oil or silicone cross-linked polymer dispersed in oil can be used. For example, as the silicone fluid oil, cyclopentasiloxane, cyclohexasiloxane, cycloheptasiloxane, cyclomethicone, cyclophenylmethicone, cyclotetrasiloxane, cyclotrisiloxane, dimethicone, octyl dimethicone, octyl trimethicone, octyl methicone, cetearyl methicone, hexadecyl methicone, hexyl methicone, lauryl methicone, myristyl methicone, phenyl methicone, stearyl methicone, stearyl dimethicone, trifluoropropyl methylsiloxane, hexadecyl dimethicone, diphenylsiloxy phenyl trimethicone, dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, methyl trimethicone, or phenyl trimethicone can be used. The above silicone oil components can be used alone or in combination of two or more.

[0027] As the ester oil, dicaprylyl carbonate, ascorbyl palmitate, ascorbic acid, ascorbyl stearate, diisostearyl malate, benzyl benzoate, benzyl laurate, butylene glycol dicaprylate / dicaprate, butylene glycol diisononanoate, butylene glycol laurate, butylene glycol stearate, butyl isostearate, cetearyl isononanoate, cetearyl nonanoate, cetyl octanoate, cetyl ethylhexanoate, cetyl isononanoate, ethylhexyl octanoate / caprate, ethylhexyl isononanoate, ethylhexyl isostearate, ethylhexyl laurate, hexyl laurate, octyldodecyl isostearate, isopropyl isostearate, isostearyl isononanoate, isostearyl isostearate, fatty acid esters, cetearyl caprylate, neopentyl glycol dicaprate, neopentyl glycol diethylhexanoate, neopentyl glycol diisononanoate, neopentyl glycol diisostearate, pentaerythritol stearate, pentaerythritol tetra(ethylhexanoate), dipentyl pentaerythritol hexaphosphate, polyglyceryl-2 diisostearate, polyglyceryl-2 sesquiisostearate, polyglyceryl-2 isostearate, polyglyceryl-2 tetraisostearate, polyglyceryl-2 triisostearate, polyglyceryl-3 diisostearate, polyglyceryl-3 isostearate, polyglyceryl-4 diisostearate, polyglyceryl-4 isostearate, polyglyceryl-6 diisostearate, polyglyceryl-6 sesquiisostearate or glyceryl monocaprylate, etc.

[0028] As triglyceride oils, C8-C12 acidic triglycerides, C12-C18 acidic triglycerides, caprylic / capric / triglycerides, caprylic / capric / lauric triglycerides, C10-C40 isoalkanoic acid triglycerides, C10-C18 triglycerides, glyceryl triacetylhydroxystearate, soybean glycerides, tribehenin, glyceryl tricaprate, monocaprylin, triheptyl, triisostearin, tripalmitin or tristearin can be used.

[0029] As the hydrocarbon oil, fluid paraffin (liquid paraffin, mineral oil), paraffin, vaseline, microcrystalline wax, squalene, or the like can be used.

[0030] As vegetable oil, avocado oil, wheat germ oil, rosehip oil, shea butter, almond oil, olive oil, macadamia oil, argan oil, meadowfoam oil, sunflower oil, castor oil, camellia oil, corn oil, safflower oil, soybean oil, rapeseed oil, macadamia oil, jojoba oil, palm oil, palm kernel oil or coconut oil may be used.

[0031] As the wax, all waxes such as hydrocarbon wax, vegetable wax or silicone wax generally used in cosmetics can be used, including, but not limited to, candelilla wax, carnauba wax, rice wax, beeswax, lanolin, ozokerite, ceresin wax, paraffin wax, microcrystalline wax, C30-C45 alkyldimethylsilylpolypropylsilsesquioxane, ethylene / propylene copolymer or polyethylene wax.

[0032] The content of the oil phase is not particularly limited, and can be adjusted in order to adjust the refractive index difference with the water phase.

[0033] In a specific example, the content of the oil or wax is 10 to 55 parts by weight, for example, 15 to 50 parts by weight, 20 to 45 parts by weight, 25 to 40 parts by weight, and 29 to 36 parts by weight, based on the weight of the entire composition. In the present invention, when the composition includes the oil in the above range, the content of the polyol with high viscosity can be relatively reduced, thereby providing a cosmetic composition with excellent feel in use.

[0034] In the composition of the present invention, the aqueous phase includes purified water, and the aqueous phase also includes a polyol. The polyol is selected from the group consisting of glycerol, 1,3-butylene glycol, dipropylene glycol and propylene glycol, and any component used to increase the refractive index of the aqueous phase can be used.

[0035] In general, the refractive index of the water phase is lower than that of the oil phase, so it is not easy to reduce the refractive index difference between the water phase and the oil phase. In the cosmetic composition of the present invention, the refractive index difference between the oil phase and the water phase is 0.009 or less. The cosmetic composition of the present invention has a small refractive index difference as described above, so that it can show a transparent and colorful emulsion that expresses structural color. When the refractive index difference between the oil phase and the water phase exceeds 0.009, the problem of decreased stability of the formulation occurs.

[0036] In a specific example, the difference in refractive index between the oil phase and the water phase is less than 0.005.

[0037] In the present invention, the property of "chromatic emulsion" refers to the property of expressing structural color according to the observation angle and light source without using pigments and dyes as coloring materials, and "structural color" refers to the color displayed when particles act as prisms, thereby dispersing, refracting and interfering light.

[0038] The cosmetic composition of the present invention may also contain all kinds of additives that can be used in general cosmetics. The above-mentioned additives may include natural additives or synthetic additives.

[0039] The natural additives include organic raw materials, plants and raw materials derived from plants, animals and raw materials derived from animals, minerals and raw materials derived from minerals, water and other ingredients. For example, the natural additives include one or more additives selected from the group consisting of moisturizers, sunscreens, neutralizers, fragrances, preservatives, antioxidants, thickeners, viscosity regulators, film-forming agents and pigments.

[0040] Based on 100 parts by weight of the total composition, the natural additives mentioned above include 0.01 to 3 parts by weight, such as 0.05 to 2 parts by weight, 0.1 to 1 part by weight.

[0041] In the present invention, the above-mentioned natural additives refer to additives obtained from natural products or natural objects, or simply improved ingredients derived from natural products or natural objects, or additives including synthetic ingredients in ingredients from nature, excluding synthetic ingredients that are not from nature but synthesized by artificial methods.

[0042] The natural raw materials mentioned above refer to, for example, cosmetic raw materials that meet national organic standards and environmental certification grades or grades derived from nature in accordance therewith.

[0043] The above-mentioned environmental certification standards refer to compositions composed of ingredients that are cultivated and processed in an environmentally friendly manner without the synthesis process. Representative environmental certifications include the French International Certification Center (ecocert), the European Cosmetics Standard Working Group (Cosmos), the US USDA (USDepartment of Agreculture), the German BDIH (Association of German Industries and Trading Firms) and the Japanese JAS (Japanese Association of Standard). In recent years, in response to the needs of consumers who like environmentally friendly products, various countries have developed various environmental certification systems to certify the safety of ingredients or products. There are local differences in local values ​​and ranges in each country, but for disposable structures of raw materials and ingredients, the scope of environmental certification shows global uniformity in the general framework. Natural ingredients from nature are included in the scope of environmentally friendly organic ingredients. For other semi-processed ingredients, they are divided into PPAI (Physically Processed Agro Ingredient) and CPAI (Chemically Processed Agro Ingredient). Only raw materials that meet these specifications are given certifications such as ecocert, Cosmos or USDA.

[0044] In the present invention, the organic and environmentally friendly certified raw materials and ingredients prescribed by the state refer to cosmetic raw materials and compositions that are composed only of ingredients that have reached or can reach the organic standards and environmentally friendly certification standards prescribed by the state and can meet the organic and environmentally friendly grades prescribed by the state. For example, it refers to ingredients that have reached or can reach the standards prescribed by the Chinese government or the organic and environmentally friendly certification standards recognized by China.

[0045] In the present invention, the synthetic additives refer to raw materials that are not derived from nature but are formed through a chemical synthesis process.

[0046] Preferably, the contents of the above ingredients included in the cosmetic composition of the present invention are within the range not exceeding the maximum usage amounts in the "Cosmetic Safety / Technical Specifications" stipulated by the Chinese government.

[0047] The cosmetic composition of the present invention can be prepared into any dosage form commonly prepared in this field. For example, the cosmetic composition can have dosage forms such as toners such as softening lotions or nourishing lotions, spray-type toners, facial emulsions, emulsions such as lotions, nourishing creams, moisturizing creams, eye creams, creams, creams, essences, cosmetic ointments, sprays, gels, masks, sunscreens, primers, liquid or spray-type foundation creams, powders, cleansing agents such as cleansing milks and cleansing oils, cleansing foams, soaps, toners, etc., but is not limited thereto.

[0048] In one specific example, the dosage form of the cosmetic composition is a water-in-oil (W / O) dosage form.

[0049] In one specific example, the cosmetic composition is transparent or translucent.

[0050] The cosmetic composition of the present invention can be used by a common method of use, and the frequency of use can be changed according to the skin condition or preference of the user.

[0051] In addition, the present invention relates to the use of the cosmetic composition for preparing cosmetics. The cosmetic composition for preparing the cosmetic of the present invention can be directly applied to the above-mentioned description of the cosmetic.

[0052] The above-mentioned cosmetics can be general cosmetics, natural cosmetics, low-irritation cosmetics or organic cosmetics.

[0053] In addition, the method for preparing the cosmetic composition of the present invention comprises the steps of: preparing an oil phase by mixing an organic sunscreen agent and a silicone surfactant obtained by cross-linking polydimethylsiloxane to which polyethylene glycol is added and polypropylene glycol.

[0054] In the above preparation method, based on 100 parts by weight of the total composition, the organic sunscreen agent is 10 to 40 parts by weight, and the silicone surfactant obtained by cross-linking polydimethylsiloxane with polyethylene glycol and polypropylene glycol is less than 10 parts by weight.

[0055] In addition, the preparation method further comprises the step of adding a water phase to the oil phase to emulsify the oil phase.

[0056] In addition, the preparation method includes the step of adding a nonionic surfactant to the oil phase.

[0057] The above organic sunscreen, the silicone surfactant obtained by cross-linking polydimethylsiloxane to which polyethylene glycol is added and polypropylene glycol, and the cosmetic composition are directly applied to the above cosmetics.

[0058] The advantages and features of the present invention and the methods for achieving the advantages and features of the present invention can be clearly understood by referring to the experimental examples and preparation examples described in detail below. However, the present invention is not limited to the experimental examples and preparation examples disclosed below, and can also be embodied in various forms different from each other. They are only used to fully disclose the present invention and fully inform the technical personnel in the field of the scope of the invention.

[0059] Effects of the Invention

[0060] The present invention relates to a UV protection cosmetic composition having a colored emulsion property comprising a high content of an organic sunscreen and a silicone surfactant obtained by cross-linking polydimethylsiloxane to which polyethylene glycol is added and polypropylene glycol. The cosmetic composition of the present invention can also exhibit a stable colored emulsion property when containing a high content of an organic sunscreen. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 These are the UV protection cosmetic compositions of Examples 1 to 3 of the present invention.

[0062] Figure 2 These are the UV shielding cosmetic compositions of Comparative Examples 1 and 2 of the present invention. DETAILED DESCRIPTION

[0063] Hereinafter, the present invention will be described in detail by the following examples. However, the following examples are only for illustration of the present invention, and the content of the present invention is not limited to the following examples.

[0064] Examples 1 to 3. Preparation of cosmetic compositions

[0065] The cosmetic compositions of Examples 1 to 3 were prepared according to the compositions described in Table 1 below. First, each raw material of Part A was stirred and heated to 70 to 90°C to completely dissolve. The dissolved solution was cooled to 45°C, and then Part A was added to Part B and stirred and mixed. Part C, which was stirred separately, was slowly added to the mixture of Part A and Part B prepared previously while stirring and uniformly mixed and emulsified. After the emulsification was completed, the mixture was cooled to 30°C and defoamed to prepare a cosmetic composition.

[0066] [Table 1]

[0067]

[0068]

[0069] Comparative Examples 1 and 2. Preparation of cosmetic compositions

[0070] According to the composition described in Table 2 below, a cosmetic composition was prepared by the same method as Examples 1 to 3.

[0071] [Table 2]

[0072]

[0073]

[0074] Experimental Example 1. Detection of the refractive index of the water phase and the oil phase

[0075] The refractive index of the water phase and the oil phase of the cosmetic compositions prepared in Examples 1 to 3 and Comparative Examples 1 and 2 was measured by Abberefractometer (KRUSS Optronic, Germany) at 25°C (Table 3). At this time, the refractive index of the water phase and the oil phase of the cosmetic composition of Example 1 was measured 10 times to confirm the refractive index difference (Table 4).

[0076] [Table 3]

[0077] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Refractive index of water phase 1.4600 1.4620 1.4535 1.4495 1.4635 Refractive index of oil phase 1.4590 1.4635 1.4537 1.4590 1.4662 Refractive index difference 0.001 0.0015 0.0002 0.0095 0.0027

[0078] [Table 4]

[0079] 1 time 2 times 3 times 4 times 5 times 6 times 7 times 8 times 9 times 10 times Refractive index of water phase 1.4600 1.4610 1.4605 1.4600 1.4600 1.4590 1.4610 1.4600 1.4605 1.4595 Refractive index of oil phase 1.4590 1.4600 1.4590 1.4585 1.4595 1.4590 1.4585 1.4600 1.4580 1.4590 Refractive index difference 0.001 0.001 0.0015 0.0015 0.0005 0 0.0025 0 0.0025 0.0005

[0080] In order to reduce the refractive index difference between the oil phase and the water phase, the refractive index of the oil phase was first detected, and then the weight of glycerin and purified water was adjusted to reduce the refractive index difference. In addition, the refractive index of the water phase and the oil phase was detected 10 times relative to Example 1 (Table 4), and the results confirmed that for the same content, a maximum detection error of 0.0025 may occur.

[0081] Experimental Example 2. Testing of hardness, UV protection factor (SPF) and UVA cut-off factor (UVAPF)

[0082] The hardness, UV protection factor (SPF (Sun Protection Factor)) and UVA cut-off factor (UVAPF (UVA Protection Factor)) of the cosmetic compositions prepared in Examples 1 to 3 and Comparative Examples 1 and 2 were measured. At this time, the hardness of the composition was measured by using Fudoh Rheometer RT C-3005D model of Rheotech Co., Ltd. using adapter #9 and driving speed of 2cm / min to a depth of 2.5cm of the sample. For SPF and UVAPF, the BASF Sunscreen Simul ator was used to evaluate the SPF and UVAPF values ​​and the results are shown in Table 5.

[0083] [Table 5]

[0084]

[0085]

[0086] As shown in Table 5, in Examples 1 to 3, various SPF and UVAPF values ​​were shown according to the type and content of the organic sunscreen agent.

[0087] Experimental Example 3. Confirmation of dosage form stability

[0088] The formulation stability of the composition was confirmed by visually observing the composition for the presence or absence of layer separation after the composition was stored at different temperature conditions (0°C, 25°C and 50°C) for 4 weeks.

[0089] <Evaluation Criteria>

[0090] Stable: no layer separation

[0091] Separation: Layer separation occurs

[0092] [Table 6]

[0093] Storage temperature Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 0℃ Stablize Stablize Stablize Stablize Separation 25℃ Stablize Stablize Stablize Stablize Separation 50℃ Stablize Stablize Stablize Stablize Separation

[0094] The stability of the dosage form was confirmed based on the storage temperature. As a result, the cosmetic compositions of Examples 1 to 3 maintained stability for 4 weeks at a temperature of 0°C to 50°C. In the case of the composition of Comparative Example 2, layer separation occurred at the temperature conditions of 0°C, 25°C, and 50°C.

[0095] Experimental Example 4: Transparency and Color Expression Evaluation

[0096] For the cosmetic compositions prepared in Examples 1 to 3 and Comparative Examples 1 and 2, the transparency and color expression intensity were judged by naked eyes, and the results shown in Tables 7, Figure 1 and Figure 2 At this time, the transparency and structural color expression strength of the cosmetic composition were evaluated by visually judging by a panel of 5 males and 5 females after the composition was stored at 25°C for 120 minutes.

[0097] [Transparency Evaluation Criteria]

[0098] ◎: Very transparent

[0099] ○: Transparent

[0100] △: Translucent

[0101] ×: Opaque

[0102] [Color expression intensity evaluation criteria]

[0103] ◎: Very strong

[0104] ○: Strong

[0105] △: weak

[0106] ×: None

[0107] [Table 7]

[0108] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 transparency ◎ ○ ◎ △ -* Color expression intensity ◎ ○ ◎ △ -*

[0109] (*Indicates that transparency cannot be detected due to phase separation of the composition)

[0110] As shown in Table 7, the cosmetic compositions of Examples 1 to 3 showed a transparent formulation, and the cosmetic composition of Comparative Example 1 showed a translucent formulation. This is because the refractive index difference between the aqueous phase and the oil phase in Comparative Example 1 was 0.0095, which was larger than that of Examples 1 to 3.

Claims

1. An anti-ultraviolet cosmetic composition comprising: An oil phase comprising: based on 100 parts by weight of the entire composition, 25 to 35 parts by weight of an organic sunscreen, 1 to less than 10 parts by weight of PEG-12 dimethicone / PPG-20 crosspolymer, and 0.1 to 10 parts by weight of lauryl PEG-9 polydimethylsiloxyethyl dimethicone; and The aqueous phase includes: polyol and purified water, The difference in refractive index between the oil phase and the water phase in the UV shielding cosmetic composition is 0.005 or less.

2. The UV protection cosmetic composition according to claim 1, wherein The organic sunscreen agent is one or more organic sunscreen agents selected from the group consisting of ethylhexyl methoxycinnamate, isoamyl p-methoxycinnamate, ethylhexyl salicylate, octocrylene, polysilicone-15, homosalate, 2-phenyl-5-benzimidazole sulfonic acid, bis-ethylhexyloxyphenol methoxyphenyl triazine, butyl methoxydibenzoylmethane, diethylaminohydroxybenzoyl hexyl benzoate, ethylhexyl triazone, 4-methylbenzylidene camphor, benzophenone-3, diethylhexyl butyramido triazone and disodium phenyl dibenzimidazole tetrasulfonate.

3. The UV protection cosmetic composition according to claim 1, wherein The cosmetic composition is a water-in-oil (W / O) formulation.

4. The UV protection cosmetic composition according to claim 1, wherein The above-mentioned cosmetic composition expresses structural color.

5. A method for preparing a UV protection cosmetic composition, comprising the following steps: The oil phase is prepared by mixing 25 to 35 parts by weight of an organic sunscreen, 1 to less than 10 parts by weight of PEG-12 dimethicone / PPG-20 crosspolymer, and 0.1 to 10 parts by weight of lauryl PEG-9 polydimethylsiloxyethyl dimethicone, based on 100 parts by weight of the entire composition.

6. The method for preparing the UV protection cosmetic composition according to claim 5, wherein: The preparation method further includes the step of adding a water phase containing a polyol and purified water to the oil phase to emulsify the mixture.

7. The method for preparing the UV protection cosmetic composition according to claim 5, wherein: The cosmetic composition is a water-in-oil (W / O) formulation.

8. The method for preparing the UV protection cosmetic composition according to claim 5, wherein: The above-mentioned cosmetic composition expresses structural color.

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