Low-viscosity cosmetic composition for UV blocking

Abstract

The present invention relates to a low-viscosity cosmetic composition for UV blocking. More specifically, the low-viscosity cosmetic composition for UV blocking, of the present invention, comprises both a water-soluble organic UV blocking agent and an oil-soluble organic UV blocking agent, and uses an anionic surfactant, a thickener, and the like, thus enabling the implementation of a sunscreen formulation having excellent stability at low viscosity without phase separation, excellent spreadability, excellent feeling of use, high sun protection factor, light and thin application, and adhesion and non-sticky feel even upon reapplication.

Description

Low viscosity UV-blocking cosmetic composition

[0001] The present invention relates to a low-viscosity UV-blocking cosmetic composition.

[0002] Ultraviolet rays from sunlight are a major cause of skin erythema, edema, freckles, and skin cancer. Therefore, much research has been actively conducted recently on various skin diseases caused by ultraviolet rays. Generally, ultraviolet rays are classified by wavelength: UV-C (200-280 nm), UV-B (280-320 nm), and UV-A (320-400 nm). UV-C passes through the ozone layer and is lost without reaching the Earth's surface, while UV-B penetrates the epidermis, causing erythema, freckles, and edema. UV-A penetrates the dermis, promoting skin cancer, wrinkles, and melanin formation, and is known to cause skin aging and irritation. Numerous epidemiological studies have demonstrated a strong relationship between sun exposure and human skin cancer, and this relationship has been discussed in detail.

[0003] As a result of the aforementioned risks associated with sun exposure, public interest in sunscreen products has increased, resulting in the introduction of sunscreen products with various sun protection factors (SPFs). Typically, sunscreen products contain inorganic sunscreens, such as titanium dioxide and zinc oxide, or organic sunscreens, such as ethylhexyl methoxycinnamate, ethylhexyl salicylate, octocrylene, butyl methoxydibenzoylmethane, bis-ethylhexyloxyphenol methoxyphenyl triazine, and diethylaminohydroxybenzoylhexyl benzoate, to achieve high SPF values.

[0004] Among these, UV-blocking cosmetics containing inorganic sunscreens have the disadvantage of causing a white cast when applied to the skin. Therefore, various technologies have been developed that only contain organic sunscreens. Organic sunscreens are further classified into water-soluble and oil-soluble organic sunscreens.

[0005] Furthermore, various technologies are known regarding oil-in-water (O / W) UV-blocking cosmetics and water-in-oil (W / O) UV-blocking compositions, depending on the manufacturing method of the product. Water-in-oil UV-blocking cosmetics are known to have a long-lasting effect due to their resistance to sweat and water, but due to their nature, they are not easily erased when washing the face and have a heavy, stuffy feel. On the other hand, oil-in-water UV-blocking cosmetics are known to be easily erased by sweat and water, but are characterized by a moist, light feel and easy application. In the case of oil-in-water cosmetics with high SPF, most organic UV-blocking ingredients are oil-soluble ingredients contained in the inner phase, which reduces UV-blocking efficacy upon application. In addition, when water-soluble organic UV-blocking ingredients are included in the outer phase, stability is often impaired due to salts contained in the aqueous phase. To stabilize the cosmetics, large amounts of wax or high-quality alcohol can be used to increase the viscosity or hardness, but this tends to make the cosmetics feel heavy and stuffy. Due to these difficulties in formulation, low-viscosity sunscreen products on the market are W / S (water-in-silicone) type cosmetics that must be shaken before use, but they quickly separate over time, which is inconvenient because they must be shaken before each use.

[0006] The purpose of the present invention is to provide a low viscosity UV-blocking cosmetic composition that does not separate, has excellent stability, excellent spreadability, excellent usability, and a high UV-blocking factor.

[0007] To achieve the above purpose, the present invention

[0008] An aqueous solution containing a water-soluble organic sunscreen;

[0009] Oily product containing organic sunscreen;

[0010] C phase in which a useful organic UV blocking agent is dispersed in water; and

[0011] Contains anionic surfactants,

[0012] A low-viscosity UV-blocking cosmetic composition having a viscosity of 2000 cps or less is provided.

[0013] The present invention comprises a water-soluble organic UV blocker and an oil-soluble organic UV blocker at the same time, and uses an anionic surfactant or the like to provide a pre-emptive formulation that has excellent stability without phase separation at low viscosity, excellent spreadability, excellent usability, high UV protection factor, is light and thin to apply, and has good adhesion and a non-sticky feel even when applied multiple times.

[0014] Figure 1 illustrates the results of verifying the storage stability of a UV-blocking cosmetic composition according to one specific example of the present invention. The images show the results observed under a microscope after each composition was stored at 45°C for three months. The images on the left show the results for Example 4, and the images on the right show the results for Comparative Example 3.

[0015] Figure 2 illustrates the results of an evaluation of the usability of a cosmetic composition for blocking ultraviolet rays according to one specific example of the invention.

[0016] Hereinafter, the configuration of the present invention will be described in detail.

[0017] The present invention relates to an aqueous solution comprising a water-soluble organic UV blocking agent;

[0018] Oily product containing organic sunscreen;

[0019] C phase in which a useful organic UV blocking agent is dispersed in water; and

[0020] Contains anionic surfactants,

[0021] The present invention relates to a low-viscosity UV-blocking cosmetic composition having a viscosity of 2000 cps or less.

[0022] The cosmetic composition for UV protection of the present invention is characterized in that it uses a water-soluble organic UV blocker and an oil-soluble organic UV blocker at the same time, includes an aqueous dispersion stabilization system (C phase) in which the oil-soluble organic UV blocker is dispersed in water, ensures stability through an anionic surfactant, etc., and manufactures the composition with a viscosity of 2,000 cps or less to improve the feeling of use.

[0023] In this specification, the term "low viscosity" may refer to a viscosity of 2,000 cps or less, 1800 cps or less, 1700 cps or less, 1600 cps or less, 1500 cps or less, 1400 cps or less, 1300 cps or less, 1200 cps or less, 1000 cps or less, 800 cps or less, or 600 cps or less, measured using a Brookfield Viscometer under the conditions of 64 spindle, 30 rpm, 1 min.

[0024] Therefore, in the UV-blocking cosmetic composition of the present invention, in order to implement a formulation having low viscosity and high UV protection factor, the water-soluble organic UV-blocking agent and the oil-soluble organic UV-blocking agent may be included in a weight ratio of 1:0.8 to 20. In this case, the weight of the oil-soluble organic UV-blocking agent refers to the total sum of the oil-soluble UV-blocking agents included in the oil phase and the C phase.

[0025] In addition, the cosmetic composition for blocking ultraviolet rays of the present invention is characterized by not containing an inorganic ultraviolet ray blocker and thus not having white turbidity.

[0026] In the present invention, the water-soluble organic UV blocker may be, but is not limited to, phenylbenzimidazole sulfonic acid, terephthalylidene dicamphor sulfonic acid, benzophenone-4, or disodium phenyl dibenzimidazole tetrasulfonate, either alone or in combination. The water-soluble organic UV blocker may be any water-soluble organic substance that has been conventionally used for UV blocking, without limitation.

[0027] The water-soluble organic UV blocker may be used in an amount of 0.01 to 20 wt%, 0.1 to 20 wt%, 1 to 20 wt%, 0.01 to 10 wt%, 0.1 to 10 wt%, 1 to 10 wt%, 0.01 to 5 wt%, 0.1 to 5 wt%, 1 to 5 wt%, 0.01 to 4 wt%, 0.1 to 4 wt%, or 1 to 4 wt%, based on the total weight of the entire composition. Within the above range, the UV blocking cosmetic composition can maintain a low viscosity while securing a high UV blocking index and high temperature stability.

[0028] According to one specific example of the present invention, in the case of a cosmetic composition that did not use a water-soluble organic UV blocker, the UV protection factor was relatively low, and the viscosity was also measured to be higher than 2,000 cps, so a low-viscosity formulation was not implemented.

[0029] In the present invention, the organic UV blocking agent may be an aminobenzoic acid compound, a benzophenone compound, a cinnamate compound, a salicylate compound, a triazine compound, butyl methoxydibenzoylmethane, bemotrizinol, bisoctrizole, benzotriazole, or polysilicon-15, but may be used alone or in combination of two or more thereof.

[0030] More specifically, examples of the aminobenzoic acid compounds include PABA (para-aminobenzoic acid), glyceryl PABA (glyceryl para-aminobenzoate), Padimate O (ethylhexyl dimethyl para-aminobenzoate), Roxadimate (amyl para-dimethylaminobenzoate), etc., and examples of the benzophenone compounds include diethylamino hydroxybenzoyl hexyl benzoate, dioxybenzone, oxybenzone, etc. Examples of the cinnamate compounds include octocrylene, octyl methoxycinnamate (octinoxate), ethoxyethyl p-methoxycinnamate (cinoxate), ethylhexyl methoxycinnamate, etc., and examples of the salicylate compounds include homomenthyl salicylate (homosalate), ethylhexyl salicylate (octyl salicylate / octisalate), trolamine salicylate, etc. Examples of the triazine compounds include, but are not limited to, bis-ethylhexyloxyphenol methoxyphenyl triazine.

[0031] The above-mentioned useful organic UV blocker may be included in an amount of 0.5 to 30 wt%, 1 to 30 wt%, 5 to 30 wt%, 7 to 30 wt%, 10 to 30 wt%, 15 to 30 wt%, 0.5 to 25 wt%, 1 to 25 wt%, 5 to 25 wt%, 7 to 25 wt%, 10 to 25 wt%, 15 to 25 wt%, 0.5 to 20 wt%, 1 to 20 wt%, 5 to 20 wt%, 7 to 20 wt%, 10 to 20 wt%, or 15 to 20 wt%, based on the total weight of the entire composition. Within the above range, the UV blocking cosmetic composition can secure a high UV blocking index while maintaining a low viscosity, and can secure high-temperature stability.

[0032] In the low-viscosity UV-blocking cosmetic composition of the present invention, the aqueous phase may further include at least one selected from the group consisting of anionic surfactants, pH regulators, thickeners, polyols, and purified water.

[0033] The above anionic surfactant may be a taurate surfactant, a glutamate surfactant, a sulfate surfactant, a sulfonate surfactant, or a phosphate surfactant.

[0034] For example, taurate surfactants that can be used include Sodium Methyl Stearoyl Taurate, Sodium Lauroyl Taurate, Disodium Laureth Sulfosuccinate, Sodium Methyl Cocoyl Taurate, Cocamidopropyl Hydroxysultaine, or Sodium Cocoyl Taurate.

[0035] Glutamate-based surfactants that can be used include Sodium Stearoyl Glutamate, Sodium Lauryl Glutamate, Sodium Cocoyl Glutamate, Sodium Myristoyl Glutamate, Sodium Palmitoyl Glutamate, or Disodium Lauryl Glutamate.

[0036] Sulfate-based surfactants may include alkyl sulfates, fatty alcohol ether sulfates, glycerol ether sulfates, fatty acid ether sulfates, hydroxyl mixed ether sulfates, monoglyceride (ether) sulfates, fatty acid amide (ether) sulfates, sulfo fatty acids, or sodium cetearyl sulfate.

[0037] Sulfonate surfactants that can be used include alkyl sulfonate, alkyl benzene sulfonate, olefin alkyl sulfonate, alkyl ether sulfonate, glycerol ether sulfonate, and methyl ester sulfonate.

[0038] Phosphate-based surfactants that can be used include C20-22 alkyl phosphate, potassium cetyl phosphate, cetyl phosphate, sodium cetyl phosphate, disodium cetyl phosphate, sodium cetearyl phosphate, or polyethylene glycol cetyl phosphate.

[0039] More specifically, the anionic surfactant may be sodium methyl stearoyl taurate, sodium stearoyl glutamate, sodium cetearyl sulfate, C20-22 alkyl phosphate, or potassium cetyl phosphate, but is not limited thereto.

[0040] The anionic surfactant may be included in an amount of 0.1 to 10 wt%, 0.1 to 5 wt%, 0.1 to 2 wt%, 0.5 to 10 wt%, 0.5 to 5 wt%, or 0.5 to 2 wt% based on the total weight of the entire composition. Within the above range, a low-viscosity formulation can be implemented, high-temperature stability is excellent, and the UV protection factor is also relatively high.

[0041] According to one specific example of the present invention, when a nonionic surfactant is used instead of an anionic surfactant, the viscosity exceeds 2,400 cps, the UV protection factor is relatively low, and the formulation is not stable when stored at 45°C for 3 months. When an anionic surfactant is used, the phase is sufficiently stable even when stored at 45°C for 3 months. However, when a nonionic surfactant is used, the formulation is unstable.

[0042] The above pH regulator may be used alone or in combination of two or more, such as tromethamine, triethanolamine, arginine, sodium hydroxide, or potassium hydroxide, but is not limited thereto.

[0043] The above polyol may be used alone or in combination of two or more, such as 1,3-butylene glycol, dipropylene glycol, propylene glycol, 1,3-propanediol, glycerin, diglycerin, methylpropanediol, ethylhexanediol, 1,2-hexanediol, or pentylene glycol, but is not limited thereto.

[0044] The above thickener may be xanthan gum, cellulose gum, hydroxyethylcellulose, Ceratonia Siliqua Gum, carbomer, acrylates / C10-30 alkyl acrylate crosspolymer, ammonium acryloyldimethyltaurate / VP copolymer, or hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer, and may be used alone or in combination of two or more thereof, but is not limited thereto.

[0045] In the low-viscosity UV-blocking cosmetic composition of the present invention, the oil phase can be prepared by using a small amount of a single or two or more kinds of a soluble organic UV-blocking agent, oil, or higher alcohol for the purpose of preparing a low-viscosity formulation.

[0046] The organic sunscreens are as described above and are omitted to avoid redundant description. The oils may be jojoba oil, avocado oil, sunflower seed oil, almond seed oil, grape seed oil, ester oil, hydrocarbon oil, or silicone oil, used alone or in combination of two or more.

[0047] The above-mentioned high-grade alcohol may be used alone or in combination of two or more types, such as cetyl alcohol, isostearyl alcohol, stearyl alcohol, or lauryl alcohol.

[0048] In the present invention, the C phase, in which the above-mentioned water-dispersed organic UV blocker is dispersed, refers to a mixture in which the water-soluble organic UV blocker is dispersed in a water-soluble solvent. More specifically, the phase can be prepared by dispersing the water-soluble organic UV blocker in a mixture of purified water, polyol, and an emulsifying stabilizer.

[0049] According to one specific example of the present invention, the C phase in which the oil-soluble organic UV filter is dispersed in water provides formulation stability of the UV-blocking cosmetic composition and provides a high UV protection factor. When the C phase in which the oil-soluble organic UV filter is dispersed in water is not added to the UV-blocking cosmetic composition, low-temperature precipitation is observed, high-temperature stability is not secured, and the UV protection factor is also relatively low. In addition, when an emulsification stabilizer is added to the oil phase instead of adding the C phase in which the oil-soluble organic UV filter is dispersed in water and the amount added is increased, the high-temperature stability of the formulation is secured, but the viscosity of the formulation exceeds 2000 cps. In addition, the usability evaluation shows that stickiness and greasy feeling become severe.

[0050] The above emulsifying stabilizer may be C12~22 fatty acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, phospholipid, phosphatidylcholine, lecithin, phosphatidylethanolamine, phosphatidylserine, phosphatidylinositol, phosphatidylglycerol, lauryl alcohol, cetyl alcohol, stearyl alcohol, cetearyl alcohol, oleyl alcohol, behenyl alcohol, linoleyl alcohol, undecylenyl alcohol, palmitoleyl alcohol, linoleyl alcohol, arachidonyl alcohol, or erucyl alcohol, but may be used alone or in combination of two or more thereof.

[0051] According to one specific example of the present invention, when preparing the low-viscosity UV-blocking cosmetic composition of the present invention in an oil-in-water formulation, first, purified water, a water-soluble organic UV-blocking agent, and a pH regulator are dispersed together, and then a polyol and anionic surfactant are added to prepare a phase A. Then, purified water and a thickener are added to prepare a phase B. Next, phase B is added to phase A and uniformly mixed using a homomixer to prepare an aqueous phase.

[0052] Next, an oil phase is prepared by dispersing a useful organic UV blocker in oil, high-grade alcohol, etc.

[0053] Next, phase C is prepared by dispersing a mixture of a soluble organic UV blocker in purified water, polyol, and an emulsion stabilizer. Then, phase C is added to the uniform mixture of the water phase and the oil phase, mixed uniformly, and then defoamed.

[0054] In addition, in one specific example of the present invention, the UV-blocking cosmetic composition may appropriately incorporate, in addition to the above components, components commonly incorporated in cosmetic compositions, such as oils, waxes, pigments, cosmetic additives, powders, sugars, antioxidants, buffers, various extracts, stabilizers, preservatives, and fragrances, within a range that does not impair the effects of the present invention.

[0055] The cosmetic composition for UV protection according to the present invention may be in the form of a liquid, lotion, or aerosol, and is preferably a lotion composition. The formulation of the cosmetic composition in the present invention may include, but is not limited to, a solution, an emulsion, or a suspension. The cosmetic composition may be formulated as, for example, a makeup primer, a makeup base, a liquid foundation, a concealer, a lip gloss, a sunscreen, a lotion, or an essence, but is not limited thereto.

[0056] Hereinafter, the present invention will be described in detail with reference to the following examples. However, the following examples are merely illustrative of the present invention, and the content of the present invention is not limited to the following examples.

[0057] <Experimental Example 1> Confirmation of UV blocking effect and viscosity according to the presence or absence of water-soluble UV blocking agent in a low-viscosity UV blocking cosmetic composition.

[0058] A UV-blocking cosmetic composition was prepared using the ingredients (weight %) listed in Table 1 below. The aqueous and oil phases were prepared separately, heated to 75°C, and the oil phase was slowly added to the aqueous phase, emulsified for 7 minutes using a homogenizer, and cooled to 55°C. Thereafter, a water-dispersed UV-blocking mixture was added, emulsified for 3 minutes using a homogenizer, and cooled to 30°C.

[0059] SPF and PFA were measured using PF-290AS (Solar Light Company, Inc.). In addition, viscosity was measured using a Brookfield Viscometer under the conditions of 64 spindle, 30 rpm, and 1 min.

[0060] The stability evaluation was conducted by observing the condition of the product after storage for 1 to 6 months at 0℃, 40℃, 45℃, and 50℃. The evaluation score was ◎ for very good, ○ for good, △ for slight separation or precipitation, and X for severe separation or precipitation.

[0061] IngredientsExample 1Example 2Example 3Comparative Example 1Comparative Example 2Comparative Example 3Comparative Example 4Water Purified waterTo100To100To100To100To100To100To100Terephthalylidene dicamphor sulfonic acid 1.981.98----8.48Phenylbenzimidazole sulfonic acid 2-2--0.54TromethamineQuantityQuantityQuantityQuantityQuantityQuantityAcrylate / C10-30Alkyl Acrylate Crosspolymer 0.50.50.50.50.50.50.50.5Sodium Cetearyl Sulfate 1111111Glycerin33333331,2-Hexanediol1.51.51.51.51.51.5 1.5 Ethylhexyl methoxycinnamate 6666662 Ethylhexyl salicylate 4.5 ...

[0062] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Oil solubility / water solubility Weight ratio 4.5 29.109--42.96 0.76 in vitro SPF 38.4 128.86 31.14 19.59 22.82 24.50 52.84 in vitro PFA 18.84 14.26 12.77 739.77 9.97 36.75 Viscosity 1440 1640 1920 2780 2700 2480 840 High temperature stability (45℃, 3 months) ◎◎◎○○△X

[0063]

[0064] As shown in Table 2, the in vitro SPF, in vitro PFA, and viscosity were confirmed according to the presence or absence of terephthalylidene dicamphor sulfonic acid and phenylbenzimidazole sulfonic acid, which are water-soluble organic UV blockers. As a result, when a water-soluble organic UV blocker was present, a UV protection factor of SPF 25 or higher was measured (Examples 1-3), and when there was no water-soluble organic UV blocker, the SPF was measured as low as 19.59, and the viscosity was also measured as high as 2,000 cps or higher (Comparative Example 1). When the oil-soluble organic UV blocker drometrizole trisiloxane was increased in the same amount instead of the water-soluble organic UV blocker, the SPF increased, but the viscosity was 2,700 cps, so a low-viscosity formulation was not implemented (Comparative Example 2).

[0065] In this experiment, a stable formulation with a high UV protection factor and low viscosity could be realized when the weight ratio of the water-soluble organic UV blocker to the oil-soluble organic UV blocker was 1: 0.8 to 20. When the weight ratio of the water-soluble organic UV blocker to the oil-soluble organic UV blocker was 1: 20 or more, the UV protection factor was low and the high-temperature stability was poor due to the high internal phase content (Comparative Example 3), and when it was 1: 0.8 or less, the UV protection factor was high, but a large amount of salt from the water-soluble organic UV blocker was generated, causing the formulation to separate at high temperatures (Comparative Example 4).

[0066] <Experimental Example 2> Confirmation of UV protection effect and stability according to the presence or absence of a water-dispersible organic UV blocking agent mixture.

[0067] UV-blocking cosmetic compositions were prepared using the ingredients (weight %) described in Table 3 below. Examples 4 and 5 are UV-blocking cosmetic compositions prepared and applied separately in phase C according to the present invention, and Comparative Examples 5 and 6 are UV-blocking cosmetic compositions further including the same amount of the organic UV-blocking agent, polyol, or emulsion stabilizer included in phase C of Examples 4 and 5 in the oil phase or the water phase.

[0068] For the examples and comparative examples described in Table 3 below, the water phase and oil phase were each prepared, heated to 75°C, and the oil phase was slowly added to the water phase while emulsifying for 7 minutes using a homogenous mixer. Then, in the case of the comparative example, it was cooled to 30°C, and in the case of the example, it was cooled to 55°C, and then the water-dispersed UV blocking agent mixture was added while emulsifying for 3 minutes using a homogenous mixer and then cooled to 30°C.

[0069] Ingredients Example 4 Example 5 Comparative Example 5 Comparative Example 6 Water Purified water To 100 To 100 To 100 To 100 Terephthalylidene dicamphor sulfonic acid 1.3 2 1.3 2 1.3 2 1.3 2 1.3 2 Phenylbenzimidazole sulfonic acid 2.5 2.5 2.5 2.5 2.5 Tromethamine Amount Amount Amount Amount Amount Acrylate / C10-30 Alkyl Acrylate Crosspolymer 0.5 0.5 0.5 0.5 Sodium Cetearyl Sulfate 1 1 1 1 Glycerin 3 3 3 1,2-Hexanediol 1.5 1.5 1.5 1.5 Propanediol--3 3 Oil Ethylhexyl Methoxycinnamate 6 6 7.5 6 Ethylhexyl Salicylate 4 .54.54.54.5 Drometrizole trisiloxane 224.54.5 Diethylaminohydroxybenzoylhexyl benzoate--1.5-Ethylhexyl triazone---1.5 Cetearyl alcohol 11 Water-dispersed sunscreen mixture Purified water 0.52--Drometrizole trisiloxane 2.5 2.5--Ethylhexyl methoxycinnamate 1.5---Diethylaminohydroxybenzoyl hexyl benzoate 1.5---Ethylhexyl triazone 1.5 Propanediol 33--Cetearyl alcohol 11--

[0070]

[0071] For each composition, stability and UV ray value were evaluated using the following evaluation method.

[0072] (Evaluation 1) Stability Check

[0073] The high-temperature stability and low-temperature precipitation of Examples 4 and 5 and Comparative Examples 5 and 6 are shown in Table 4 below.

[0074] The stability evaluation was performed according to the method described in Experimental Example 1.

[0075] High temperature stability (50℃, 1 month) High temperature stability (45℃, 3 months) High temperature stability (40℃, 6 months) Low temperature precipitation (0℃, 6 months) Example 4◎◎◎◎Comparative example 5X△○△Example 5◎◎◎◎Comparative example 6X△○△

[0076]

[0077] As can be seen in Table 4, Examples 4 and 5 maintained stability over time at high temperatures, and no precipitation occurred at low temperatures. On the other hand, Comparative Examples 5 and 6 showed relatively unstable stability at high temperatures, and precipitation occurred at low temperatures.

[0078] The image on the left side of Fig. 1 shows particles observed under a microscope after Example 4 was stored at 45°C for 3 months, and the image on the right side shows particles of Comparative Example 5 after being stored at 45°C for 3 months. That is, even when stored at high temperatures for a long period of time, it can be confirmed that the particles of Example 4 are maintained more finely and uniformly than those of Comparative Example 5, and thus, as shown in Table 4, it can be confirmed that the examples are more stable than the comparative examples.

[0079] (Evaluation 2) In vitro SPF / PFA verification

[0080] SPF and PFA were measured using an in vitro measurement method in which UV transmittance was measured by applying Examples 4 and 5 and Comparative Examples 5 and 6 to a skin simulating plate.

[0081] Example 4 Example 5 Comparative Example 5 Comparative Example 6 in vitro SPF 5 2.1 44 1.4 4 35 42 33 09 in vitro PFA 3 1.0 7 2 1.7 3 16 37 16 81

[0082]

[0083] As shown in Table 5, when comparing in vitro SPF and in vitro PFA, they showed low viscosity, but Example 4 showed a relatively high UV protection index compared to Comparative Example 5, and Example 5 showed a relatively high UV protection index compared to Comparative Example 6.

[0084] <Experimental Example 3> Confirmation of stability, viscosity, usability, and ease of use according to the presence or absence of emulsifier stabilizer.

[0085] In the above Experimental Examples 1 and 2, the low-viscosity UV-blocking cosmetic compositions contained an emulsifying stabilizer in the C phase and exhibited low viscosity and high-temperature stability. When the emulsifying stabilizer was included in the oil phase instead of the C phase, the viscosity and high-temperature stability of the compositions were confirmed, and the usability and convenience of each composition were compared. To this end, Example 4 and Comparative Examples 7 to 10, which did not include the C phase but included an emulsifying stabilizer in the oil phase, were prepared with the compositions and contents (weight %) shown in Table 6 below.

[0086] For the examples and comparative examples, the water phase and oil phase were prepared separately, heated to 75°C, and the oil phase was slowly added to the water phase while emulsifying for 7 minutes using a homogenous mixer. Then, in the case of the comparative example, the temperature was cooled to 30°C, and in the case of the example, the temperature was cooled to 55°C, and then the water-dispersed UV blocking agent mixture was added while emulsifying for 3 minutes using a homogenous mixer and then cooled to 30°C.

[0087] Ingredients Example 4 Comparative Example 7 Comparative Example 8 Comparative Example 9 Comparative Example 10 Water Purified water To 100 To 100 To 100 To 100 To 100 Terephthalylidene dicamphor sulfonic acid 1.32 1.32 1.32 1.32 1.32 Phenylbenzimidazole sulfonic acid 2.5 2.5 2.5 2.5 2.5 2.5 Tromethamine Amount Amount Amount Amount Amount Amount Amount Acrylate / C10-30 alkyl acrylate crosspolymer 0.5 0.5 0.5 0.5 0.5 Sodium cetearyl sulfate 11 1 1 Glycerin 33 3 3 1,2-hexanediol 1.5 1.5 1.5 1.5 1.5 1.5 Propanediol-33 3 Oil Ethylhexyl methoxycinnamate 67.5 7.5 7.57.5 Ethylhexyl salicylate 4.54.54.54.54.5 Drometrizole trisiloxane 24.54.54.54.5 Diethylaminohydroxybenzoylhexyl benzoate-1.51.51.51.5 Cetearyl alcohol-1234 Water-dispersible sunscreen mixture Purified water 0.5--- Drometrizole trisiloxane 2.5--- Ethylhexyl methoxycinnamate 1.5--- Diethylaminohydroxybenzoyl hexyl benzoate 1.5--- Propanediol 3--- Cetearyl alcohol 1---

[0088]

[0089] (Evaluation 1) Check viscosity and high temperature stability

[0090] The compositions of Example 4 and Comparative Examples 7 to 10 manufactured in Experimental Example 3 were measured according to the method described in Experimental Example 1 to compare their stability at high temperature (45°C, 3 months).

[0091] Example 4 Comparative Example 7 Comparative Example 8 Comparative Example 9 Comparative Example 10 High-temperature stability (45°C, 3 months) ◎X△◎◎

[0092]

[0093] In the case of Comparative Example 7, as mentioned in Table 7, high temperature stability was unstable, and in the case of Comparative Examples 8 to 10, in which the amount of emulsifying stabilizer was increased and applied, it was stable at high temperatures.

[0094] The viscosity of the compositions of Example 4 and Comparative Examples 7 to 10 manufactured in Experimental Example 3 was measured according to the method described in Experimental Example 1, and the results are shown in Table 7 below.

[0095] Example 4 Comparative Example 7 Comparative Example 8 Comparative Example 9 Comparative Example 10 Viscosity (cps) 1240 1820 6100 12340 17480

[0096]

[0097] Example 4 and Comparative Example 7 produced low-viscosity compositions, but Comparative Examples 8 to 10, which additionally added an emulsifying stabilizer to ensure high-temperature stability in Comparative Example 7, did not produce low-viscosity compositions. Example 4, which did not include an emulsifying stabilizer in the oil phase and included Phase C, produced low-viscosity compositions while also exhibiting excellent emulsifying stability at high temperatures.

[0098] (Evaluation 2) Usability Evaluation

[0099] To compare the usability of the product, 20 women in their 20s and 40s were tested on their skin. The sensory evaluation was conducted using a 5-point scale, and the results are shown in Table 8 below. The evaluation criteria were as follows: 5 points (very good), 4 points (good), 3 points (average), 2 points (poor), and 1 point (very poor). For stickiness and tackiness, a 5-point rating was given to the least stickiness and tackiness:

[0100] 1: Very bad; 2: Bad; 3: Average; 4: Good; 5: Very good

[0101] Example 4 Comparative Example 8 Comparative Example 9 Comparative Example 10 Spreadability 4.8 3.8 3.2 2.2 Moisture 4.6 3.4 2.8 2.1 Stickiness 4.2 3.12 4 1.8 Spreading 4.3 3.5 3.12 7

[0102]

[0103] As shown in Table 9, the spreadability and moisture content of Example 4, which had a viscosity of 2,000 cps or less, were found to be higher than those of Comparative Examples 8 to 10, which had relatively high viscosities, and it was confirmed that the stickiness and greasyness became more severe as the content of the emulsifying stabilizer increased.

[0104] (Evaluation 3) Ease of use evaluation

[0105] In order to evaluate the ease of dispensing of the cosmetic composition manufactured in Experimental Example 3, the compositions of Example 4 and Comparative Examples 8 to 10 were filled into the same blow container and then the amount of contents was compared when a constant pressure was applied and the compositions were dispensed.

[0106] As can be seen in Fig. 2, Example 4 was able to dispense an appropriate amount of content compared to Comparative Examples 8 to 10, and Comparative Examples 8 to 10 had relatively high viscosity, so a considerable amount of pressure had to be applied to dispense the same amount as Example 4, and thus it was confirmed that the convenience of use was relatively low.

[0107] <Experimental Example 4> Confirmation of UV-blocking effect and stability of low-viscosity UV-blocking cosmetic compositions with or without anionic surfactants.

[0108] Low-viscosity UV-blocking cosmetic compositions with and without anionic surfactants were prepared using the ingredients listed in Tables 10 and 11 below. The aqueous and oil phases were each prepared and heated to 75°C. The oil phase was slowly added to the aqueous phase, emulsified for 7 minutes using a homogenizer, and cooled to 55°C. Subsequently, a water-dispersible UV-blocking mixture was added, emulsified for 3 minutes using a homogenizer, and cooled to 30°C.

[0109] Ingredients Example 6 Example 7 Example 8 Example 9 Water phase Purified water To 100 To 100 To 100 To 100 Terephthalylidene dicamphor sulfonic acid 1.3 2 1.3 2 1.3 2 1.3 2 1.3 2 Phenylbenzimidazole sulfonic acid 2.5 2.5 2.5 2.5 Tromethamine Amount Amount Amount Amount Amount Acrylate / C10-30 alkyl acrylate crosspolymer 0.5 0.5 0.5 0.5 Glycerin 33 3 3 1,2-hexanediol 1.5 1.5 1.5 1.5 Sodium stearoyl glutamate 0.7 Sodium methyl stearoyl taurate 0.7 Oil phase C20-22 alkyl phosphate 0. 7 Cetyl Phosphate 0.7 Ethylhexyl Methoxycinnamate 6666 Ethylhexyl Salicylate 4.5 4.5 4.5 4.5 4.5 Drometrizole Trisiloxane 2222 Water Dispersible Sunscreen Mixture Purified Water 0.5 0.5 0.5 0.5 Drometrizole Trisiloxane 2.5 2.5 2.5 2.5 Ethylhexyl Methoxycinnamate 1.5 1.5 1.5 1.5 Diethylamino Hydroxybenzoyl Hexyl Benzoate 1.5 1.5 1.5 1.5 Propanediol 3333 Cetearyl Alcohol 1111

[0110] Ingredients Example 10 Example 11 Comparative Example 11 Comparative Example 12 Water phase Purified water To 100 To 100 To 100 To 100 Terephthalylidene dicamphor sulfonic acid 1.3 2 1.3 2 1.3 2 1.3 2 1.3 2 Phenylbenzimidazole sulfonic acid 2.5 2.5 2.5 2.5 2.5 Tromethamine Amount Amount Amount Amount Amount Acrylate / C10-30 alkyl acrylate crosspolymer 0.5 0.5 0.5 0.5 Glycerin 3 3 3 1,2-hexanediol 1.5 1.5 1.5 1.5 Sodium cetearyl sulfate 0.7 Potassium cetyl phosphate 0.7 Oil phase Polyglyceryl-3 distearate 0.7 Cetearyl sulfate Allyl olivate 0.7 Ethylhexyl methoxycinnamate 6666 Ethylhexyl salicylate 4.5 4.5 4.5 4.5 4.5 Drometrizole trisiloxane 2222 Water-dispersible sunscreen mixture Purified water 0.5 0.5 0.5 0.5 0.5 Drometrizole trisiloxane 2.5 2.5 2.5 2.5 Ethylhexyl methoxycinnamate 1.5 1.5 1.5 1.5 Diethylaminohydroxybenzoyl hexyl benzoate 1.5 1.5 1.5 1.5 Propanediol 3333 Cetearyl alcohol 1111

[0111] Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Comparative Example 11 Comparative Example 12 Viscosity (cps) 480 1140 580 360 380 1680 2440 2680

[0112]

[0113] As a result of measuring the viscosity according to the method described in Experimental Example 1, as shown in Table 12, when a nonionic surfactant (polyglyceryl-3 distearate, cetearyl olivate) was applied to the formulation, it was confirmed that a low-viscosity UV-blocking cosmetic composition with a viscosity of 2,000 cps or more was produced, and when an anionic surfactant was included, a low-viscosity UV-blocking cosmetic composition with a viscosity of 2,000 cps or less was produced.

[0114] (Evaluation 1) In vitro SPF / PFA verification according to the presence or absence of anionic surfactants

[0115] In vitro SPF and in vitro PFA were determined depending on the presence or absence of anionic surfactants. As shown in Table 13, it was confirmed that a relatively high UV protection factor was measured when anionic surfactants (Example 6-11) were included within the same UV protection ingredient content.

[0116] Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Comparative Example 11 Comparative Example 12 in vitro SPF 48.3 3 41.7 9 46.8 1 42.8 7 43.3 9 47.2 5 38.9 37.3 in vitro PFA 26.1 6 21.0 4 25.8 221.8 9 21.9 4 25.8 18.4 8 18.89

[0117]

[0118] (Evaluation 2) Stability Check

[0119] High-temperature stability was confirmed according to the presence or absence of anionic surfactants as described in Experimental Example 1. As shown in Table 14, it was confirmed that the 3-month stability at high temperature (45°C) of Examples 6 to 11 was superior to that of Comparative Examples 11 and 12.

[0120] Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Comparative Example 11 Comparative Example 12 High temperature stability (45°C, 3 months) ◎◎◎◎◎◎△△

[0121]

[0122] The present invention can be utilized in the field of sunscreens.

Claims

1. A water-soluble organic sunscreen containing an aqueous solution; Oily product containing organic sunscreen; C phase in which a useful organic UV blocking agent is dispersed in water; and Contains anionic surfactants, A cosmetic composition for blocking ultraviolet rays, having a viscosity of 2000 cps or less.

2. In paragraph 1, A cosmetic composition for blocking ultraviolet rays, wherein a water-soluble organic ultraviolet ray blocker and an oil-soluble organic ultraviolet ray blocker are included in a weight ratio of 1:0.8 to 20.

3. In paragraph 1, A cosmetic composition for blocking ultraviolet rays is a cosmetic composition for blocking ultraviolet rays that does not contain an inorganic ultraviolet ray blocker.

4. In paragraph 1, A cosmetic composition for blocking ultraviolet rays, wherein the water-soluble organic ultraviolet ray blocker is at least one selected from the group consisting of phenylbenzimidazole sulfonic acid, terephthalylidene dicamphor sulfonic acid, benzophenone-4, and disodium phenyl dibenzimidazole tetrasulfonate.

5. In paragraph 1, A cosmetic composition for blocking ultraviolet rays, wherein the organic UV blocking agent is at least one selected from the group consisting of aminobenzoic acid compounds, benzophenone compounds, cinnamate compounds, salicylate compounds, triazine compounds, butyl methoxydibenzoylmethane, bemotrizinol, bisoctrizole, benzotriazole compounds, and polysilicone-15.

6. In paragraph 1, A cosmetic composition for blocking ultraviolet rays, wherein the composition further comprises at least one selected from the group consisting of anionic surfactants, pH regulators, thickeners, polyols, and purified water.

7. In paragraph 6, A cosmetic composition for blocking ultraviolet rays, wherein the anionic surfactant is at least one selected from the group consisting of a taurate surfactant, a glutamate surfactant, a sulfate surfactant, a sulfonate surfactant, and a phosphate surfactant.

8. In paragraph 6, A cosmetic composition for sunscreen, wherein the pH adjusting agent is at least one selected from the group consisting of tromethamine, triethanolamine, arginine, sodium hydroxide and potassium hydroxide.

9. In paragraph 6, A cosmetic composition for blocking ultraviolet rays, wherein the polyol is at least one selected from the group consisting of 1,3-butylene glycol, dipropylene glycol, propylene glycol, 1,3-propanediol, glycerin, diglycerin, methylpropanediol, ethylhexanediol, 1,2-hexanediol, and pentylene glycol.

10. In paragraph 6, A cosmetic composition for sunscreen, wherein the thickener is at least one selected from the group consisting of xanthan gum, cellulose gum, hydroxyethylcellulose, Ceratonia Siliqua Gum, carbomer, acrylates / C10-30 alkyl acrylate crosspolymer, ammonium acryloyldimethyltaurate / VP copolymer, and hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer.

11. In paragraph 1, A cosmetic composition for sunscreen, further comprising at least one selected from the group consisting of a useful organic sunscreen agent, an oil, and a higher alcohol.

12. In paragraph 1, A cosmetic composition for sunscreen, wherein the C phase, in which the organic sunscreen is dispersed in water, is prepared by dispersing the organic sunscreen in a mixture of purified water, polyol, and an emulsifying stabilizer.

13. In paragraph 12, A cosmetic composition for blocking ultraviolet rays, wherein the emulsifying stabilizer is at least one selected from the group consisting of fatty acids, phospholipids, lauryl alcohol, cetyl alcohol, stearyl alcohol, cetearyl alcohol, oleyl alcohol, behenyl alcohol, linoleyl alcohol, undecylenyl alcohol, palmitoleyl alcohol, linolenyl alcohol, arachidonyl alcohol, and erucyl alcohol.

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