Oil-in-water type cosmetic composition for blocking ultraviolet rays, and preparation method therefor

Abstract

The present invention relates to an oil-in-water type cosmetic composition for blocking ultraviolet rays. The composition according to one aspect may comprise an ultraviolet blocking component, which causes a heavy feel during application, whitening and greasiness, in a small amount so as to exhibit a high level of ultraviolet protection while improving application feel, and has excellent persistent water resistance, and thus can be effectively used as an oil-in-water type waterproof cosmetic 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] Ultraviolet (UV) radiation is a factor that has a highly harmful effect on skin health. It penetrates the dermis to destroy structural proteins such as collagen and elastin, causing wrinkles and a loss of elasticity. Additionally, it causes direct DNA damage in the epidermis, promoting inflammatory responses and pigmentation, thereby inducing various types of skin damage. In particular, prolonged exposure to UV radiation increases the production of reactive oxygen species (ROS), inducing oxidative stress. This accelerates the aging of skin cells and, in severe cases, can lead to skin cancer.

[0003] Recently, due to environmental issues such as global warming and ozone depletion, the UV index has been continuously rising, and the need for continuous year-round UV protection is becoming increasingly important. Under these circumstances, it is essential to use waterproof sunscreens that do not easily wash off with sweat or water; however, conventional waterproof sunscreens contain oil as an external agent to enhance skin adhesion. Nevertheless, these water-in-oil type sunscreens present problems, such as an unpleasant and heavy sensation that feels stuffy and sticky on the skin, and they do not wash off easily during cleansing, which can clog pores and cause skin irritation. Additionally, water-in-oil type sunscreens may suffer from reduced waterproof efficacy.

[0004] On the other hand, increasing the concentration of UV-blocking ingredients for effective protection leads to a pronounced white cast in the formulation, resulting in an unnatural skin tone and exacerbating the heavy, sticky texture. This white cast and heavy feel reduce consumers' usage frequency and application amount of sunscreen, ultimately preventing them from achieving sufficient UV protection. Therefore, innovative formulation technology is required that can maintain excellent protection while controlling the concentration of UV-blocking ingredients to an appropriate level.

[0005] Therefore, there is a need to develop a new formulation of a sunscreen cosmetic composition that can minimize white cast and provide a refreshing feel to the skin by optimizing the content of sunscreen ingredients, while maintaining excellent UV protection and waterproof performance.

[0006] Accordingly, the inventors developed an in-water type waterproof cosmetic composition for UV protection by controlling the content of UV-blocking ingredients, and completed the present invention by confirming that the composition has excellent texture, moisture, water resistance, and UV-blocking efficacy.

[0007] One aspect provides a cosmetic composition for UV protection comprising a film former and a UV blocker.

[0008] Another aspect is to provide a use of a composition comprising a film former and a UV blocker for the manufacture of a cosmetic composition for UV protection.

[0009] Another aspect provides a method for protecting the skin of an object from ultraviolet rays, comprising the step of applying an effective amount of a composition comprising a film former and an ultraviolet blocker to the object.

[0010] One aspect provides a cosmetic composition for UV protection comprising a film former and a UV blocker.

[0011] The above composition may be any formulation commonly used in cosmetic compositions, but specifically may be an oil-in-water (O / W) type.

[0012] The above composition may include a film former and a UV blocker in the oil phase.

[0013] The above film former (film-forming agent) may include hydrogenated castor oil / sebacic acid copolymer, and may further include one or more selected from the group consisting of capryloyl glycerin / sebacic acid copolymer and castor oil / IPDI copolymer, but is not limited thereto.

[0014] The above-mentioned hydrogenated castor oil / sebacic acid copolymer refers to a synthetic polymer compound produced by polymerizing hydrogenated castor oil and sebacic acid. The above-mentioned hydrogenated castor oil / sebacic acid copolymer is formed through an esterification reaction between a hydrogenated derivative of ricinoleic acid derived from castor oil and sebacic acid, a dicarboxylic acid, and has excellent biocompatibility as a fatty acid-derived component.

[0015] Since the above composition includes the hydrogenated castor oil / sebacic acid copolymer as a film former, the UV blocking effect can be improved, and thus the content of the UV blocking ingredient can be reduced. Accordingly, the above composition can have excellent usability by including a low amount of the UV blocking ingredient, while simultaneously having excellent UV blocking effect and long-lasting water resistance.

[0016] The above hydrogenated castor oil / sebacic acid copolymer is present in an amount of 0.001 to 30 wt% based on the total weight of the composition, for example, 0.001 to 20 wt%, 0.001 to 10 wt%, 0.01 to 10 wt%, 0.001 to 5 wt%, 0.01 to 5 wt%, 0.1 to 5 wt%, 0.001 to 2.4 wt%, 0.01 to 2.4 wt%, 0.05 to 2.4 wt%, 0.1 to 2.4 wt%, 0.001 to 2.3 wt%, 0.01 to 2.3 wt%, 0.05 to 2.3 wt%, 0.1 to 2.3 wt%, 0.01 to 2 wt%, 0.05 to 2 wt%, 0.1 to It may be included in an amount of 2% by weight, or 0.5 to 2% by weight. If the amount is outside the above range, the formulation of the composition may not be formed, or there may be problems such as reduced spreadability, water resistance, or UV blocking effect.

[0017] The above-mentioned sunscreen may comprise organic or inorganic sunscreens, specifically comprising one or more selected from the group consisting of ethylhexyl triazone and diethylamino hydroxybenzoyl hexyl benzoate, and zinc oxide, titanium dioxide, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylamino hydroxybenzoyl hexyl benzoate, drometrizole trisiloxane, ethylhexyl methoxycinnamate, and octocrylene It may further comprise, but is not limited to, one or more selected from the group consisting of (octocrylene), homosalate, butyl methoxydibenzoylmethane, ethylhexyl salicylate, methylene bis-benzotriazolyl tetramethylbutylphenol, diethylhexyl butamido triazone, phenylbenzimidazole sulfonic acid, tris-biphenyl triazine, and terephthalylidene dicamphor sulfonic acid.

[0018] In one embodiment, the composition may include ethylhexyl triazone or diethylamino hydroxybenzoyl hexyl benzoate, and it was confirmed that the UV blocking effect, sustained water resistance, and usability are excellent by including the hydrogenated castor oil / sebacic acid copolymer as a film former. In addition, it was confirmed that the UV blocking effect, sustained water resistance, and usability are particularly excellent when the composition includes ethylhexyl triazone and diethylamino hydroxybenzoyl hexyl benzoate in addition to the hydrogenated castor oil / sebacic acid copolymer.

[0019] The ethylhexyl triazone may be included in an amount of 0.001 to 30 weight%, for example, 0.001 to 20%, 0.05 to 20%, 0.01 to 20%, 0.01 to 10 weight%, 0.1 to 10 weight%, 0.01 to 7 weight%, 0.1 to 7 weight%, 0.01 to 5 weight%, 0.1 to 5 weight%, or 0.5 to 5 weight% based on the total weight of the composition. If the amount falls outside the above range, there may be problems such as failure to form a formulation of the composition or reduced spreadability, water resistance, or UV blocking effect.

[0020] The above diethylamino hydroxybenzoyl hexyl benzoate may be included in an amount of 0.001 to 30 wt%, for example, 0.01 to 30 wt%, 0.05 to 30 wt%, 0.01 to 20 wt%, 0.1 to 20 wt%, 0.01 to 15 wt%, 0.1 to 15 wt%, 0.01 to 10 wt%, 0.1 to 10 wt%, or 0.5 to 10 wt% based on the total weight of the composition. If the amount falls outside the above range, there may be problems such as failure to form a formulation of the composition or reduced spreadability, water resistance, or UV blocking effect.

[0021] The above composition may comprise the film former and the UV blocker in a weight ratio of 1:0.01 to 50, for example, 1:0.05 to 50, 1:0.1 to 50, 1:0.1 to 40, 1:0.5 to 40, 1:0.1 to 30, or 1:0.5 to 30. If the ratio falls outside the above range, there may be problems such as failure to form a formulation of the composition or reduced spreadability, water resistance, or UV blocking effect.

[0022] The above composition may further include one or more aqueous components selected from polyols, solvents, preservatives, and surfactants.

[0023] The above polyol may include one or more selected from propanediol, 1,2-hexanediol, and pentylene glycol, and the polyol may be included in an amount of 0.01 to 20 weight%, for example 0.1 to 15 weight%, 0.5 to 10 weight%, or 0.8 to 6 weight% based on the total weight of the composition.

[0024] The above preservative may include hydroxyacetophenone, and the preservative may be included in an amount of 0.001 to 10 weight%, for example, 0.01 to 5 weight%, 0.05 to 1 weight%, 0.1 to 0.5 weight%, or 0.3 weight% based on the total weight of the composition.

[0025] The above surfactant may include sodium stearoyl glutamate, and the surfactant may be included in an amount of 0.001 to 10 weight%, for example 0.001 to 5 weight%, 0.01 to 0.5 weight%, 0.05 to 0.2 weight%, or 0.1 weight% based on the total weight of the composition.

[0026] The above composition may further include one or more oil phase components selected from surfactants, conditioning agents, and higher alcohols.

[0027] The above surfactant may include a polyglyceryl-based surfactant or a nonionic surfactant.

[0028] The above polyglyceryl-based surfactant may be one or more selected from polyglyceryl-3 methylglucose distearate, polyglyceryl-3 distearate, polyglyceryl-6 distearate, polyglyceryl-6 stearate, polyglyceryl-6 behenate, polyglyceryl-3 diisostearate, and polyglyceryl-3 stearate, and the above polyglyceryl-based surfactant may be in an amount of 0.01 to 20 weight%, for example, 0.01 to 10 weight%, 0.1 to 5 weight%, or 1 to 3 weight% based on the total weight of the composition. Or it may be included in 2 weight percent.

[0029] The above nonionic surfactant may include glyceryl stearate, and the above nonionic surfactant may be included in an amount of 0.001 to 20 weight%, for example 0.001 to 10 weight%, 0.01 to 5 weight%, 0.1 to 1 weight%, or 0.5 weight% based on the total weight of the composition.

[0030] The above conditioning agent may include diisopropyl sebacate, and the conditioning agent may be included in an amount of 0.1 to 50 weight%, for example 1 to 40 weight%, 10 to 30 weight%, 15 to 25 weight%, or 20 weight% based on the total weight of the composition.

[0031] The above higher alcohol may include behenyl alcohol, and the above higher alcohol may be included in an amount of 0.001 to 20 weight%, for example 0.001 to 10 weight%, 0.01 to 5 weight%, 0.1 to 1 weight%, or 0.5 weight% based on the total weight of the composition.

[0032] The above composition may further include one or more thickening agent components selected from carbomer, sodium acrylate crosspolymer-2, acrylate / C10-30 alkyl acrylate crosspolymer, and polyacrylate crosspolymer-6.

[0033] The above-mentioned thickening agent component may be included in an amount of 0.0001 to 10 weight%, for example, 0.001 to 1 weight%, or 0.01 to 0.5 weight% based on the total weight of the composition.

[0034] The above composition can be prepared in any formulation that can be typically used in cosmetic compositions, but it may be an oil-in-water (O / W) cosmetic composition comprising an aqueous phase and an oil phase.

[0035] The above cosmetic composition may be an oil-in-water type waterproof UV protection cosmetic composition with improved texture, moisture, and water resistance.

[0036] The aforementioned "feel" refers to the totality of overall sensory and sensory characteristics experienced by the user when applied to the skin. This feeling may include various elements such as spreadability, absorption, skin adhesion, residue, moisture, hydration, stickiness, freshness, lightness, and weight. This feeling is determined by the physical properties, chemical composition, and formulation of the cosmetic, and is an important quality characteristic that directly influences consumer product preference and continued use.

[0037] The above sensation may refer to a white cast, stickiness, clogged pores, or skin irritation resulting from the inclusion of UV-blocking ingredients.

[0038] The above moisturizing sensation refers to the moist and humid sensory characteristics felt when applied to the skin. This can be determined by the moisture content, moisture retention capacity, moisture delivery ability, etc., within the composition.

[0039] 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; the higher the water resistance and 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.

[0040] 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.

[0041] The above ultraviolet protection refers to all actions that protect the skin from ultraviolet rays (UV). The above ultraviolet protection may include UVA or UVB protection.

[0042] The above-described water-in-oil type cosmetic composition for sunscreen may be a water-in-oil type cosmetic composition for sunscreen that has an excellent sunscreen effect despite containing a small amount of sunscreen ingredients, and at the same time, improves usability such as improved white cast, improved stickiness, improved pore clogging, improved skin irritation, and improved skin allergic reaction due to containing a small amount of sunscreen ingredients, as well as improved water resistance and sustained water resistance and improved skin moisturizing effect.

[0043] In one embodiment, it was confirmed that an oil-in-water type cosmetic composition for sunscreen containing a film former, a hydrogenated castor oil / sebacic acid copolymer, in an amount of 0.5 to 2 weight% based on the total weight of the composition, has a moist sensation, a fresh feel, excellent water resistance, and an excellent sunscreen effect despite having a low content of sunscreen ingredients.

[0044] 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.

[0045] 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.

[0046] Another aspect provides a use of a composition comprising a film former and a UV blocker for the manufacture of a cosmetic composition for UV protection. In the said use, any terms or elements mentioned that are identical to those already mentioned are as described above.

[0047] Another aspect provides a method for protecting the skin of an object from ultraviolet rays, comprising the step of applying an effective amount of a composition comprising a film former and an ultraviolet blocker to the object. In the method, any terms or elements mentioned that are identical to those already mentioned are as described above.

[0048] 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.

[0049] The term "effective amount" refers to an amount effective enough to produce the effect mentioned above.

[0050] 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.

[0051] A composition according to one aspect is an oil-in-water type cosmetic composition for sunscreen that includes a hydrogenated castor oil / sebacic acid copolymer as a film former. Despite containing a small amount of sunscreen ingredients, it has a moisturizing sensation, a fresh feel, and excellent water resistance, and at the same time has an excellent sunscreen effect, so it can be usefully used as an oil-in-water type waterproof cosmetic composition for sunscreen.

[0052] 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.

[0053] [Example]

[0054] Examples 1–11. Preparation of water-in-oil type cosmetic compositions for UV protection

[0055] An oil-in-water type cosmetic composition for UV protection was prepared as follows. The specific ingredients and contents of the composition are as shown in Table 1 below.

[0056] Specifically, the aqueous phase and the thickening agent were placed in a stirrer and stirred at 5,000 rpm for about 5 to 10 minutes, after which the mixture was heated to 80 ℃. Thereby, the oil phase was also heated to 80 ℃ to confirm complete dissolution, and then slowly added using a stirrer while stirring at 3,000 rpm. Once the addition was complete, the stirring speed was increased to 8,000 rpm and stirred for about 10 minutes, after which the mixture was cooled to 30 ℃ to finally prepare the water-in-oil type UV-blocking cosmetic compositions of Examples 1 to 11.

[0057] [Table 1]

[0058]

[0059] [Comparative Example]

[0060] Comparative Example 1. Preparation of a composition not containing hydrogenated castor oil / sebacic acid copolymer

[0061] Comparative Example 1 was prepared in the same manner as Example 1, except that it did not include the hydrogenated castor oil / sebacic acid copolymer, which is the film former of Examples 1 to 11. The specific components and contents of the composition are as shown in Table 2 below.

[0062] [Table 2]

[0063]

[0064] [Experimental Example]

[0065] Experimental Example 1. Evaluation of UV blocking effect

[0066] 1-1. Evaluation through SPF value measurement

[0067] To evaluate the UVB ultraviolet blocking effect of the examples and comparative examples, an experiment was conducted to measure the SPF (Sun Protection Factor) value as follows.

[0068] Specifically, UV transmittance was measured by applying a sample to a polymethyl methacrylate (PMMA HELIO PLATE HD6) plate and using a UV-2000S (Labsphere, Inc. USA), in reference 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.

[0069] 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.

[0070] [Mathematical Formula 1]

[0071]

[0072] As a result, as shown in Table 3 below, it can be seen that the UV blocking effect against UVB is improved in Examples 1 to 9, which contain hydrogenated castor oil / sebacic acid copolymer as the film former, compared to Comparative Examples 1 to 3, which do not contain a film former. Specifically, it was confirmed that Examples 1 to 3, which contain the same amount of UV blocking ingredient as Comparative Example 1, showed a UV blocking effect improved by approximately 2.5 to 4 times depending on the content of the film former; Examples 4 to 6, which contain the same amount of UV blocking ingredient as Comparative Example 2, showed a UV blocking effect improved by approximately 1.3 to 2.9 times depending on the content of the film former; and Examples 7 to 9, which contain the same amount of UV blocking ingredient as Comparative Example 3, showed a UV blocking effect improved by approximately 1.9 to 2.3 times depending on the content of the film former. In particular, it can be seen that Examples 6 to 9 have a significantly superior UV blocking effect.

[0073] [Table 3]

[0074]

[0075] 1-2. Evaluation through PA value measurement

[0076] To evaluate the UVA ultraviolet blocking effect of the examples and comparative examples, an experiment was conducted to measure the PA (Protection Grade of UVA) value as follows.

[0077] Specifically, the UVA protection factor (UVAPF) was measured using the UV-2000S (Labsphere, Inc., USA). The specifications were based on the "Method for in vitro determination of UVA protection" (2009), and the sample application amount was 1.3 mg / cm² as specified by COLIPA (European Cosmetics Association). 2 Refer to [the reference] and apply an amount of 1.3 mg × 22 cm to the polymethyl methacrylate plate2 = 28.6 mg. After drying for about 30 minutes, it was measured.

[0078] As a result, as shown in Table 4 below, it can be seen that the UV blocking effect against UVA is improved in the examples containing hydrogenated castor oil / sebacic acid copolymer as the film former, compared to the comparative example that does not contain a film former. Specifically, it was confirmed that the UV blocking effect is improved depending on the content of the film former in Examples 4 to 6, which contain the same amount of UV blocking ingredient as Comparative Example 2. In addition, it was confirmed that the UV blocking effect is improved in Example 11, which contains the same amount of diethylaminohydroxybenzoylhexyl benzoate as Comparative Example 2, due to the inclusion of hydrogenated castor oil / sebacic acid copolymer, despite having a lower content of UV blocking ingredient. In particular, it can be seen that there is a significantly superior UV blocking effect in Examples 5 to 9 and 11.

[0079] [Table 4]

[0080]

[0081] Experimental Example 2. Evaluation of Sustained Water Resistance

[0082] To evaluate the sustained water resistance of the examples and comparative examples, an experiment was conducted to measure the SPF values ​​before and after the sustained water resistance test as follows.

[0083] For the water resistance UV blocking transmittance, the sample was applied to an HD-6 plate and left for 20 minutes, then 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 before and after the continuous water resistance test.

[0084] The SPF value measurement above was performed in the same manner as described in the UV blocking power evaluation of Experimental Example 1-1 above.

[0085] As a result, as shown in Table 5 below, it can be seen that sustained water resistance is improved in Examples 1 to 9, which contain hydrogenated castor oil / sebacic acid copolymer as the film former, compared to Comparative Examples 1 to 3, which do not contain a film former. Specifically, Examples 1 to 3, which contain the same amount of UV blocking ingredient as Comparative Example 1, showed sustained water resistance improved according to the content of the film former, unlike Comparative Example 1, where water resistance could not be measured; Examples 4 to 6, which contain the same amount of UV blocking ingredient as Comparative Example 2, showed sustained water resistance improved by about 2.9 to 7.9 times according to the content of the film former; and Examples 7 to 9, which contain the same amount of UV blocking ingredient as Comparative Example 3, showed sustained water resistance improved by about 4.6 to about 5.8 times according to the content of the film former. In addition, it was confirmed that Example 10, which contains the same amount of ethylhexyl triazone as Comparative Example 2, has improved water resistance due to the inclusion of hydrogenated castor oil / sebacic acid copolymer despite having a low UV blocking ingredient content.

[0086] [Table 5]

[0087]

[0088] Experimental Example 3. Evaluation of Usability and Spreadability

[0089] To evaluate the usability and spreadability of the examples and comparative examples, a sensory evaluation was conducted as follows.

[0090] Specifically, the usability and spreadability of the cosmetic composition were evaluated using a skin panel test. Each sample was dispensed onto the skin and rolled, and the usability and spreadability at the point where the phase changed were tested by 10 panel testers, who rated it 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 spreadability score.

[0091] The evaluation scale was marked as 5 points - very good, 4 points - good, 3 points - average, 2 points - bad, and 1 point - very bad.

[0092] As a result, compared to Comparative Examples 1 to 3 which do not contain a film former, it was found that the usability and spreadability were improved in Examples 1 to 9 which contain a hydrogenated castor oil / sebacic acid copolymer as the film former. Specifically, in Examples 1 to 3 which contain the same amount of UV blocking ingredient as Comparative Example 1, the usability and spreadability improved to 5 points depending on the content of the film former; in Examples 4 to 6 which contain the same amount of UV blocking ingredient as Comparative Example 2, the usability and spreadability improved to 4 or 5 points depending on the content of the film former; and in Examples 7 to 9 which contain the same amount of UV blocking ingredient as Comparative Example 3, the usability and spreadability improved to 3 or 4 points depending on the content of the film former. In addition, it was confirmed that Example 10, which contains an equal amount of ethylhexyl triazone as Comparative Example 2, and Example 11, which contains an equal amount of diethylaminohydroxybenzoylhexyl benzoate, have improved usability and spreadability by containing a hydrogenated castor oil / sebacic acid copolymer.

[0093] In other words, it can be seen that when hydrogenated castor oil / sebasic acid copolymer is included as a film former, the UV protection effect and water resistance are improved, and at the same time, the feel and spreadability are improved.

[0094] [Table 6]

[0095]

[0096] In summary, it was confirmed that a cosmetic composition for sunscreen containing a hydrogenated castor oil / sebacic acid copolymer according to one aspect can be used as an in-water type waterproof cosmetic composition for sunscreen, as it possesses a moist sensation, a fresh feel, and excellent water resistance, as well as an excellent sunscreen effect, despite using a small amount of sunscreen ingredients.

Claims

1. A cosmetic composition for UV protection comprising a film former and a UV blocker.

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

3. A cosmetic composition for blocking ultraviolet rays according to claim 1, wherein the film former comprises a hydrogenated castor oil / sebacic acid copolymer.

4. A cosmetic composition for sunscreen according to claim 3, wherein the hydrogenated castor oil / sebacic acid copolymer is included in an amount of 0.01 to 10 weight% based on the total weight of the composition.

5. A cosmetic composition for sunscreen according to claim 1, wherein the sunscreen comprises one or more selected from the group consisting of ethylhexyl triazone and diethylamino hydroxybenzoyl hexyl benzoate.

6. A cosmetic composition for blocking ultraviolet rays according to claim 5, wherein the ethylhexyl triazone is included in an amount of 0.05 to 20 weight% based on the total weight of the composition.

7. A cosmetic composition for blocking ultraviolet rays according to claim 5, wherein the diethylamino hydroxybenzoyl hexyl benzoate is included in an amount of 0.05 to 30 weight% based on the total weight of the composition.

8. A cosmetic composition for blocking ultraviolet rays according to claim 1, wherein the composition comprises the film former and the ultraviolet blocker in a weight ratio of 1:0.1 to 50.

9. Use of a composition comprising a film former and a UV blocker for the manufacture of a cosmetic composition for UV protection.

10. A method for protecting the skin of an object from ultraviolet rays, comprising the step of applying an effective amount of a composition comprising a film former and an ultraviolet blocker to the object.

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