Oil-in-water type cosmetic material composition for blocking ultraviolet rays and method for manufacturing same

Abstract

The present invention relates to an oil-in-water type cosmetic material composition for blocking ultraviolet rays. The composition according to one aspect has a moisturizing feeling, a refreshing feeling, and excellent long-lasting water resistance, and also exhibits an excellent ultraviolet ray blocking effect, and thus can be effectively used as an oil-in-water type waterproof cosmetic material composition for blocking ultraviolet rays.

Description

Water-in-oil type cosmetic composition for UV protection and method for manufacturing the same

[0001] This invention relates to an in-water type cosmetic composition for UV protection and a method for manufacturing the same.

[0002] While the importance of using waterproof formulations that do not easily wash off with sweat or water is increasing, existing products have several drawbacks. For example, sunscreens, a representative type of waterproof product, are generally water-in-oil type, which contain oil as an external component to enhance skin adhesion.

[0003] However, this has the drawback of causing an unpleasant and heavy sensation, such as feeling stuffy and sticky on the skin, and it is difficult to remove during cleansing, which can clog pores and cause skin trouble. Additionally, oil-in-water sunscreens have the issue that their waterproof effectiveness may be reduced.

[0004] Therefore, there is a need to develop a new cosmetic composition that provides a refreshing sensation to the skin while also offering excellent waterproof performance.

[0005] Accordingly, the inventors developed an in-water type cosmetic composition and confirmed that the composition has excellent sustained water resistance, thereby completing the present invention.

[0006] One aspect provides a cosmetic composition comprising an oil phase comprising a hydrogenated castor oil / sebasic acid copolymer and a polyglyceryl-based emulsifier; and an aqueous phase.

[0007] Another aspect provides a method for preparing a cosmetic composition comprising the step of preparing an oil phase solution comprising a hydrogenated castor oil / sebasic acid copolymer and a polyglyceryl-based emulsifier.

[0008] Another aspect is to provide a use of a composition comprising an oil phase comprising a hydrogenated castor oil / sebasic acid copolymer and a polyglyceryl-based emulsifier, and an aqueous phase, for the manufacture of a cosmetic composition for sunscreen.

[0009] Another aspect provides a method for protecting the skin of an individual from ultraviolet rays, comprising the step of applying an effective amount of a composition comprising an oil phase comprising a hydrogenated castor oil / sebasic acid copolymer and a polyglyceryl-based emulsifier; and an aqueous phase to an individual.

[0010] One aspect provides a cosmetic composition comprising an oil phase comprising a hydrogenated castor oil / sebasic acid copolymer and a polyglyceryl-based emulsifier; and an aqueous phase.

[0011] The above composition may be any formulation commonly used in cosmetic compositions, but specifically, it may be an oil-in-water (O / W) type. The above oil-in-water type cosmetic composition may have one or more of the following enhanced effects: UV protection, sustained water resistance, moisturizing sensation, and usability; in particular, it may have enhanced sustained water resistance.

[0012] The above composition may be for ultraviolet protection. The above ultraviolet protection refers to any action that protects the skin from ultraviolet rays (UV).

[0013] The above composition may include a UV blocking solution in one or more of the oil phase and the water phase. The above UV blocking cosmetic composition may have one or more of the following enhanced effects: UV blocking effect, sustained water resistance, moisturizing sensation, and usability.

[0014] The above-mentioned UV blocking solution may include one or more selected from the group consisting of organic and inorganic UV blockers, and may include water-soluble or oil-soluble UV blockers. Specifically, as an inorganic sunscreen, it may include one or more selected from the group consisting of zinc oxide and titanium dioxide, and as an organic sunscreen, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylamino hydroxybenzoyl hexyl benzoate, drometrizole trisiloxane, ethylhexyl methoxycinnamate, octocrylene, homosalate, butyl methoxydibenzoylmethane, and ethylhexyl salicylate. It may comprise one or more selected from the group consisting of salicylate, methylene bis-benzotriazolyl tetramethylbutylphenol, diethylhexyl butamido triazone, tris-biphenyl triazine, and terephthalylidene dicamphor sulfonic acid.

[0015] The sunscreen included in the above oil phase may include one or more selected from the group consisting of ethylhexyl triazone, diethylhexyl butamidotriazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylaminohydroxybenzoyl hexyl benzoate, drometrizole trisiloxane, octocrylene, ethylhexyl salicylate, homosalate, and butyl methoxydibenzoyl methane.

[0016] The sunscreen included in the above aqueous phase may include one or more selected from the group consisting of methylenebis-benzotriazolyltetramethylbutylphenol and tris-biphenyltriazine.

[0017] The above organic sunscreen may be included in an amount of 0.01 to 30 weight%, for example, 0.1 to 20 weight%, or 2 to 10 weight% based on the total weight of the composition.

[0018] The above-mentioned inorganic sunscreen may be included in an amount of 0.01 to 25 weight%, for example, 0.01 to 20 weight%, 0.1 to 10 weight%, or 2 to 5 weight% based on the total weight of the composition.

[0019] The above-mentioned inorganic sunscreen may be included in the aqueous phase or the oil phase, and specifically may be included in the oil phase.

[0020] The above-mentioned hydrogenated castor oil / sebacic acid copolymer refers to a copolymer obtained by the reaction of sebacic acid and hydrogenated castor oil.

[0021] The above hydrogenated castor oil / sebacic acid copolymer is present in an amount of 0.0001 to 30 wt% based on the total weight of the composition, for example, 0.001 to 30 wt%, 0.001 to 20 wt%, 0.001 to 10 wt%, 0.001 to 5 wt%, 0.01 to 30 wt%, 0.01 to 20 wt%, 0.01 to 10 wt%, 0.01 to 5 wt%, 0.05 to 30 wt%, 0.05 to 20 wt%, 0.05 to 10 wt%, 0.05 to 5 wt%, 0.01 to 5 wt%, 0.05 to 5 wt%, 0.001 to 2.4 wt%, 0.01 to 2.4 wt%, 0.001 to It may be included in an amount of 2.3 wt%, 0.01 to 2.3 wt%, 0.001 to 2 wt%, 0.01 to 2 wt%, 0.05 to 2.4 wt%, 0.05 to 2.3 wt%, or 0.05 to 2 wt%. If the amount falls outside the above range, there may be problems such as the formulation of the composition not being formed or reduced spreadability, water resistance, and UV blocking effect.

[0022] The above polyglyceryl-based emulsifier may comprise one or more selected from the group consisting of polyglyceryl-3 methylglucose distearate, polyglyceryl-3 distearate, polyglyceryl-6 distearate, polyglyceryl-6 stearate, polyglyceryl-6 behenate, polyglyceryl-3 diisostearate, polysorbate 20, and polyglyceryl-3 stearate, and specifically may comprise polyglyceryl-3 methylglucose distearate.

[0023] The above polyglyceryl-based emulsifier may be included in an amount of 0.0001 to 20 wt% based on the total weight of the composition, for example, 0.001 to 10 wt%, 0.01 to 5 wt%, 0.1 to 5 wt%, 0.3 to 5 wt%, 0.01 to 3 wt%, 0.1 to 3 wt%, 0.3 to 3 wt%, 0.001 to 1.9 wt%, 0.01 to 1.9 wt%, 0.1 to 1.9 wt%, 0.3 to 1.9 wt%, 0.001 to 1.5 wt%, 0.01 to 1.5 wt%, 0.1 to 1.5 wt%, 0.3 to 1.5 wt%, 0.01 to 1 wt%, 0.1 to 1 wt%, or 0.3 to 1 wt%. If the above range is exceeded, there may be problems such as failure to form the formulation of the composition, or reduced spreadability, water resistance, and UV protection effect.

[0024] The above oil phase may further comprise one or more selected from the group consisting of a skin conditioning agent and an organic UV blocking solution.

[0025] The above skin conditioning agent may contain a polyol.

[0026] The above organic UV blocking solution may comprise one or more selected from the group consisting of organic UV blockers, inorganic UV blockers, thickeners, skin conditioning agents, and emulsifiers.

[0027] The above organic ultraviolet blocking solution may include one or more selected from the group consisting of ethylhexyl triazone, diethylhexyl butamidotriazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylaminohydroxybenzoyl hexyl benzoate, drometrizole trisiloxane, octocrylene, ethylhexyl salicylate, homosalate, and tilmethoxydibenzoyl methane.

[0028] The above organic UV blocking solution may be included in an amount of 5 to 50% by weight, for example, 10 to 40% by weight, 15 to 30% by weight, 20 to 25% by weight, or 23% by weight, based on the total weight of the composition. If the amount falls outside the above range, there may be problems such as the formulation of the composition not being formed, or reduced spreadability, water resistance, and UV blocking effect.

[0029] The above-mentioned UV blocking solution (e.g., organic UV blocking solution, water-soluble UV blocking solution, etc.) does not necessarily mean a liquid, but may include solid, liquid, semi-solid, etc., and is not limited to a specific phase.

[0030] The above-mentioned aqueous portion may include a film former or a thickening agent.

[0031] The above film former may comprise polyether-1, polyester-5, or a combination thereof.

[0032] The above composition comprises polyether-1, polyester-5, or a combination thereof in an amount of 0.001 to 10 wt%, for example, 0.001 to 5 wt%, 0.01 to 5 wt%, 0.001 to 1 wt%, 0.01 to 1 wt%, 0.05 to 1 wt%, 0.10 to 1 wt%, 0.11 to 1 wt%, 0.001 to 0.9 wt%, 0.01 to 0.9 wt%, 0.05 to 0.9 wt%, 0.10 to 0.9 wt%, 0.11 to 0.9 wt%, 0.001 to 0.75 wt%, 0.01 to 0.75 wt%, 0.05 to 0.75 wt%, 0.1 to 0.75 wt%, 0.11 wt%, 0.11 wt%, based on the total weight of the composition. It may contain up to 0.75 wt%, 0.001 to 0.6 wt%, 0.01 to 0.6 wt%, 0.05 to 0.6 wt%, 0.1 to 0.6 wt%, 0.11 to 0.6 wt%, 0.001 to 0.55 wt%, 0.01 to 0.55 wt%, 0.05 to 0.55 wt%, 0.1 to 0.55 wt%, 0.11 to 0.55 wt%, or 0.15 to 0.5 wt%. If the above range is exceeded, there may be a problem in that the formulation of the composition is not formed or the spreadability is poor.

[0033] The above composition comprises polyether-1 and polyester-5 in a ratio of 1:0.01 to 50, for example, 1:0.1 to 30, 1:1 to 30, 1:2 to 30, 1:5 to 30, 1:10 to 30, 1:12 to 30, 1:13 to 30, 1:0.1 to 20, 1:1 to 20, 1:2 to 20, 1:5 to 20, 1:10 to 20, 1:12 to 20, 1:13 to 20, 1:0.1 to 16, 1:1 to 16, 1:2 to 16, 1:5 to 16, 1:10 to 16, 1:12 to 16, 1:13 to 16, 1:0.1 to 15, It may be included in a weight ratio of 1:1 to 15, 1:2 to 15, 1:5 to 15, 1:10 to 15, 1:12 to 15, 1:13 to 15, or 1:14. If the above range is exceeded, the formulation of the composition may not be formed, or there may be problems with reduced spreadability, water resistance, and UV blocking effect.

[0034] The above aqueous portion comprises polyether-1 and polyester-5 in a ratio of 1:0.01 to 50, for example, 1:0.1 to 30, 1:1 to 30, 1:2 to 30, 1:5 to 30, 1:10 to 30, 1:12 to 30, 1:13 to 30, 1:0.1 to 20, 1:1 to 20, 1:2 to 20, 1:5 to 20, 1:10 to 20, 1:12 to 20, 1:13 to 20, 1:0.1 to 16, 1:1 to 16, 1:2 to 16, 1:5 to 16, 1:10 to 16, 1:12 to 16, 1:13 to 16, 1:0.1 to 15, It may be included in a weight ratio of 1:1 to 15, 1:2 to 15, 1:5 to 15, 1:10 to 15, 1:12 to 15, 1:13 to 15, or 1:14. If the above range is exceeded, the formulation of the composition may not be formed, or there may be problems with reduced spreadability, water resistance, and UV blocking effect.

[0035] The above-mentioned thickener may comprise one or more selected from the group consisting of acrylic thickeners, carbomers, and cellulose-based thickeners, and specifically may comprise a cellulose-based thickener.

[0036] The above acrylic thickener may comprise one or more selected from the group consisting of acrylates / C10-30 alkyl acrylate crosspolymer, ammonium acryloyldimethyltaurate / VP copolymer, sodium polyacryloyldimethyl taurate, ammonium polyacryloyldimethyl taurate, acrylates / octylacrylamide copolymer, and acrylates copolymer.

[0037] The above-mentioned cellulose-based thickener may comprise one or more selected from the group consisting of cetyl hydroxyethylcellulose, hydroxyethyl cellulose, microcrystalline cellulose, and hydroxypropyl methylcellulose stearoxy ether, and specifically may comprise cetyl hydroxyethylcellulose.

[0038] The above-mentioned cellulose-based thickener is present in an amount of 0.00001 to 1 wt% based on the total weight of the composition, for example, 0.00005 to 0.8 wt%, 0.0001 to 0.8 wt%, 0.0005 to 0.8 wt%, 0.001 to 0.8 wt%, 0.00005 to 0.4 wt%, 0.0001 to 0.4 wt%, 0.0005 to 0.4 wt%, 0.001 to 0.4 wt%, 0.00005 to 0.3 wt%, 0.0001 to 0.3 wt%, 0.0005 to 0.3 wt%, 0.001 to 0.3 wt%, 0.00005 to 0.1 wt%, 0.0001 to 0.1 wt%, based on the total weight of the composition. It may comprise 0.0005 to 0.1 wt%, 0.001 to 0.1 wt%, 0.00005 to 0.05 wt%, 0.0001 to 0.05 wt%, 0.0005 to 0.05 wt%, 0.001 to 0.05 wt%, 0.00005 to 0.02 wt%, 0.0001 to 0.02 wt%, 0.0005 to 0.02 wt%, 0.001 to 0.02 wt%, 0.00005 to 0.015 wt%, 0.00005 to 0.015 wt%, 0.0001 to 0.015 wt%, 0.0005 to 0.015 wt%, 0.001 to 0.015 wt%, or 0.005 to 0.015 wt%. If the above range is exceeded, there may be problems such as failure to form the formulation of the composition, or reduced spreadability, water resistance, and UV protection effect.

[0039] The above aqueous phase may further comprise one or more selected from the group consisting of solvents, skin conditioning agents, emulsifiers, thickeners, water-soluble UV blocking solutions, and antioxidants.

[0040] The above solvent may include purified water or a polyol. The above polyol may include 1,2-hexanediol.

[0041] The above skin conditioning agent may include a polyol. The polyol may include one or more selected from the group consisting of propanediol, pentylene glycol, aminomethylpropanediol, xyloglucan, and glycerin.

[0042] The above emulsifier may include sodium stearoyl glutamate.

[0043] The above-mentioned thickening agent may include one or more selected from the group consisting of sodium acrylate crosspolymer-2, acrylate / C10-30 alkyl acrylate crosspolymer, polyacrylate crosspolymer-6, cetylhydroxyethylcellulose, and carbomer.

[0044] The above-mentioned water-soluble UV blocking solution may comprise one or more selected from the group consisting of methylenebis-benzotriazolyltetramethylbutylphenol and tris-biphenyltriazine. The above-mentioned water-soluble UV blocking solution may further comprise a thickening agent.

[0045] The above water-soluble UV blocking solution may be included in an amount of 0.01 to 30% by weight, for example, 0.1 to 20% by weight, 0.1 to 10% by weight, 1 to 10% by weight, 1 to 5% by weight, or 3% by weight, based on the total weight of the composition. If the amount falls outside the above range, there may be problems such as the formulation of the composition not being formed or reduced spreadability, water resistance, and UV blocking effect.

[0046] The above antioxidant may include hydroxyacetophenone.

[0047] The above cosmetic composition may be an oil-in-water type waterproof UV protection cosmetic composition in which one or more of the feel, moisture, and sustained water resistance are improved. In particular, it may be a waterproof UV protection cosmetic composition in which sustained water resistance is improved.

[0048] The above water resistance refers to the property of withstanding water or moisture. In other words, it is the property of maintaining original functions and characteristics even when exposed to water; if the original function is defined as UV blocking power, then the higher the water resistance UV blocking power, the better the UV blocking ability is maintained even under moist conditions. The above water resistance may include sustained water resistance. The above water resistance may be used interchangeably with waterproof.

[0049] The above-mentioned sustained water resistance refers to the property of withstanding water or moisture for a longer period than water resistance. It may refer to the degree to which the UV blocking ability is maintained without the composition washing away even under conditions of prolonged exposure to moisture, such as water or sweat. The above-mentioned sustained water resistance can be used interchangeably with waterproof.

[0050] The above cosmetic composition may be prepared in a formulation comprising a lotion (skin lotion), skin softener, skin toner, astringent, lotion, milk lotion, moisture lotion, nourishing lotion, massage cream, nourishing cream, moisture cream, eye cream, hand cream, foundation, essence, nourishing essence, eye essence, pack, soap, cleansing foam, cleansing lotion, cleansing cream, cleansing water, cleansing oil, cleansing tissue, hand sanitizer, body lotion, body cream, body cleanser, suspension, gel, powder, paste, shampoo, hair essence, treatment, rinse, scalp pack, mask pack or sheet, or aerosol composition. Compositions of such formulations may be prepared according to methods conventional in the field.

[0051] The ingredients included in the above cosmetic composition may include ingredients commonly used in cosmetic compositions, and may include, for example, conventional auxiliary agents and carriers such as stabilizers, solubilizers, vitamins, pigments, and fragrances.

[0052] Another aspect provides a method for preparing a cosmetic composition comprising: (a) a step of preparing an aqueous phase solution; and (b) a step of mixing an oil phase solution comprising a hydrogenated castor oil / sebaic acid copolymer and a polyglyceryl-based emulsifier into the aqueous phase solution. In the method, any terms or elements mentioned that are identical to those already mentioned are as described above.

[0053] Another aspect provides a use of a composition comprising an oil phase comprising a hydrogenated castor oil / sebacic acid copolymer and a polyglyceryl-based emulsifier; and an aqueous phase, for the manufacture of a cosmetic composition for sunscreen. In the said use, any terms or elements mentioned that are identical to those already mentioned are as described above.

[0054] Another aspect provides a method for protecting the skin of an individual from ultraviolet rays, comprising the step of applying an effective amount of a composition comprising an oil phase comprising a hydrogenated castor oil / sebacic acid copolymer and a polyglyceryl-based emulsifier; and an aqueous phase to an individual. In the method, any terms or elements mentioned that are identical to those already mentioned are as described above.

[0055] The term "applying" may mean the placement of a composition according to one embodiment into an individual by a method or route that results in at least partial localization of the composition according to one embodiment to a desired site. The application may include application to the skin.

[0056] The term "effective amount" refers to an amount effective enough to produce the effect mentioned above.

[0057] The above-mentioned entity may be a mammal, for example, a human. The above-mentioned entity may be an entity requiring a UV protection effect.

[0058] A composition according to one aspect is an oil-in-water type cosmetic composition for UV protection, and since it has a moist moisturizing sensation, a refreshing feel, and excellent water resistance, it can be usefully used as an oil-in-water type waterproof cosmetic composition for UV protection.

[0059] Figure 1 is a figure showing the results of evaluating the sustained water resistance of Example 2 (bottom) and Example 8 (top).

[0060] The following examples will be explained in more detail. However, these examples are intended to illustrate one or more specific examples, and the scope of the present invention is not limited to these examples.

[0061] [Example]

[0062] Examples 1–11. Preparation of cosmetic compositions

[0063] According to the ingredients and content of Table 1 below, the aqueous phase solution was mixed and stirred at 5,000 rpm for about 5 to 10 minutes, and heated to 80°C. Similarly, according to the ingredients and content of Table 1 below, the oil phase solution was mixed and stirred, and heated to 80°C. After confirming that the oil phase solution was completely dissolved, the oil phase solution was slowly added to the heated aqueous phase solution while stirring at 3,000 rpm. After the addition was completed, the stirring speed was increased to 8,000 rpm and stirred for an additional 10 minutes to finally prepare an oil-in-water type cosmetic composition for UV protection (Examples 1 to 11).

[0064] [Table 1]

[0065]

[0066] In Table 1 above, the water-soluble UV blocking solution may comprise one or more selected from the group consisting of methylenebis-benzotriazolyltetramethylbutylphenol and tris-biphenyltriazine, and the organic UV blocking solution may comprise one or more selected from the group consisting of ethylhexyl triazone, diethylhexylbutamidotriazone, bis-ethylhexyloxyphenolmethoxyphenyltriazine, diethylaminohydroxybenzoylhexylbenzoate, drometrizole trisiloxane, octocrylene, ethylhexyl salicylate, homosalate, and butylmethoxydibenzoylmethane.

[0067] [Comparative Example]

[0068] Comparative Example 1. Preparation of a composition not comprising a combination of hydrogenated castor oil / sebacic acid copolymer and a polyglyceryl-based emulsifier

[0069] Comparative Example 1 was prepared in the same manner as Examples 1 to 11, except that the oil phase did not contain hydrogenated castor oil / sebacic acid copolymer and polyglyceryl-based emulsifier as in Examples 1 to 11, and the aqueous phase did not contain polyether-1, polyester-5, and cetylhydroxyethylcellulose. The specific components and their contents are as shown in Table 2 below.

[0070] [Table 2]

[0071]

[0072] [Experimental Example]

[0073] Experimental Example 1. Evaluation of Sustained Water Resistance

[0074] To evaluate the sustained water resistance of Examples 1 to 11, SPF values ​​were measured before and after the water resistance evaluation, and high-resolution images were taken as follows.

[0075] 1-1. Evaluation through SPF value measurement

[0076] To evaluate the sustained water resistance of Examples 1 to 11 and Comparative Examples, experiments were conducted as follows.

[0077] Specifically, the UV transmittance SPF value was measured by applying a sample to a polymethyl methacrylate (PMMA HELIO PLATE HD6) plate and using a UV-2000S (Labsphere, Inc. USA), referring to the test specifications described in the COLIPA (European Cosmetics Association) "method for the in-vitro determination of UVA protection provided by sunscreen products." The sample application amount was 1.3 mg / cm² as specified in COLIPA. 2 Refer to [the reference] and apply an amount of 1.3 mg × 22 cm to the polymethyl methacrylate plate 2 = 28.6 mg, dried in a dark room for about 15 minutes, and then measured.

[0078] The transmittance was measured in the wavelength range of 290 nm to 400 nm using UV-200S, and the SPF (Sun Protection Factor) value was calculated using LABSPHERE. A higher SPF index (ultraviolet protection index) indicates that UV is blocked more effectively, and the SPF index was calculated according to the following Equation 1.

[0079] [Mathematical Formula 1]

[0080]

[0081] In addition, for the evaluation of water resistance, the sample was applied to an HD-6 plate for UV blocking transmittance, left for 20 minutes, and attached to the bottom of a 2L beaker. Afterward, 1000ml of 40℃ tap water was added, stirred using an Aji mixer at a rotation speed of 250rpm for 40 minutes, and dried for 30 minutes to measure the SPF value by comparing it before and after the continuous water resistance test.

[0082] As a result, as shown in Table 3 below, unlike Comparative Example 1, which does not contain hydrogenated castor oil / sebacic acid copolymer and polyglyceryl-based emulsifier in the oil phase and does not contain polyether-1, polyester-5, and cetylhydroxyethylcellulose in the aqueous phase, Examples 1 to 11, which contain at least one of the above five types, were found to maintain a high SPF value even after the sustained water resistance test, and in particular, Examples 1 to 3, which contain all of the above five types, were confirmed to show the highest SPF value after the sustained water resistance test.

[0083] This means that although water-in-oil type cosmetic compositions generally have poor water resistance, if at least one of the five types is included, sufficiently excellent water resistance can be maintained even in water-in-oil type formulations.

[0084] [Table 3]

[0085]

[0086] 1-2. Evaluation through high-resolution image capture

[0087] To evaluate the sustained water resistance of the examples, high-resolution image capture experiments were conducted on the compositions of Examples 2 and 8 as follows.

[0088] The subject's test site (inner forearm) was washed with IVORY soap and kept in a constant temperature and humidity room (22±2℃, 40–60% RH) for approximately 10 minutes, after which the test site was photographed using VISIA-CR (Canfield scientific, Inc, USA). Specifically, high-resolution images were captured before application, immediately after application, after washing under running water for 30 seconds, and after washing under running water for 30 seconds and rolling 50 times, thereby recording the results of the continuous water resistance test. A darker color in the photographed area indicates superior UV protection.

[0089] As a result, as shown in Figure 1, it was confirmed that the sustained water resistance was excellent in the case of Examples 2 and 8, as there was no significant reduction in UV blocking during 30 seconds of washing with running water, and in particular, it was confirmed that the sustained water resistance was significantly excellent in Example 2.

[0090] Experimental Example 2. Evaluation of Usability and Moisture Sense

[0091] To evaluate the feel of use and moisture of the examples and comparative examples, a sensory evaluation was conducted as follows.

[0092] Specifically, the evaluation of usability and moisture was performed by evaluating the degree of usability and moisture of the cosmetic composition through a skin panel test. Each sample was dispensed onto the skin and rolled, and the usability and moisture at the point where the phase changed were tested by 10 panel testers on a scale of 1 to 5 points. The average value of the scores evaluated by the 10 panel testers was calculated to determine the usability and moisture scores.

[0093] The evaluation scale was marked as 5 points - very good, 4 points - good, 3 points - average, 2 points - bad, and 1 point - very bad.

[0094] As a result, as shown in Table 4 below, unlike Comparative Example 1, which had poor water resistance, usability, and moisture content, Examples 1 to 11 were confirmed to have excellent water resistance, as well as excellent usability and moisture content. In particular, it can be seen that Examples 1 to 3 have significantly excellent usability and moisture content.

[0095] [Table 4]

[0096]

[0097] In summary, it was confirmed that the composition according to one aspect possesses a moist sensation, a refreshing feel, and excellent water resistance, while simultaneously having an excellent UV blocking effect, and thus can be used as an in-water type waterproof cosmetic composition for UV protection.

Claims

1. An oil phase comprising a hydrogenated castor oil / sebaic acid copolymer and a polyglyceryl-based emulsifier; and a cosmetic composition comprising an aqueous phase.

2. A cosmetic composition according to claim 1, wherein the composition is of the oil-in-water (O / W) type.

3. A cosmetic composition according to claim 1, wherein the composition comprises a UV blocking solution in at least one of an oil phase and an aqueous phase.

4. A cosmetic composition according to claim 1, wherein the composition is for blocking ultraviolet rays.

5. A cosmetic composition according to claim 1, wherein the composition comprises 0.001 to 10 weight% of hydrogenated castor oil / sebacic acid copolymer.

6. A cosmetic composition according to claim 1, wherein the composition comprises 0.001 to 20 weight% of a polyglyceryl-based emulsifier.

7. A cosmetic composition according to claim 1, wherein the polyglyceryl-based emulsifier comprises one or more selected from the group consisting of polyglyceryl-3 methylglucose distearate, polyglyceryl-3 distearate, polyglyceryl-6 distearate, polyglyceryl-6 stearate, polyglyceryl-6 behenate, polyglyceryl-3 diisostearate, and polyglyceryl-3 stearate.

8. A cosmetic composition according to claim 1, wherein the aqueous portion comprises a film former or a thickening agent.

9. A cosmetic composition according to claim 8, wherein the film former comprises polyether-1, polyester-5, or a combination thereof.

10. A cosmetic composition according to claim 1, wherein the aqueous portion comprises polyether-1 and polyester-5 in a weight ratio of 1:1 to 30.

11. A cosmetic composition according to claim 8, wherein the thickening agent comprises a cellulose-based thickening agent.

12. A cosmetic composition according to claim 11, wherein the cellulose-based thickening agent comprises one or more selected from the group consisting of cetyl hydroxyethylcellulose, hydroxyethyl cellulose, microcrystalline cellulose, and hydroxypropyl methylcellulose stearoxy ether. 13.(a) Step of preparing an aqueous solution; (b) a step of mixing an oil phase solution comprising a hydrogenated castor oil / sebaic acid copolymer and a polyglyceryl-based emulsifier into the aqueous phase solution; a method for preparing a cosmetic composition.

14. Use of a composition comprising an oil phase comprising a hydrogenated castor oil / sebacic acid copolymer and a polyglyceryl-based emulsifier for the preparation of a cosmetic composition for UV protection; and an aqueous phase.

15. A method for protecting the skin of an individual from ultraviolet rays, comprising the step of applying an effective amount of a composition comprising an oil phase comprising a hydrogenated castor oil / sebacic acid copolymer and a polyglyceryl-based emulsifier; and an aqueous phase to an individual.

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