Cosmetic composition for blocking ultraviolet rays without white turbidity phenomenon

Abstract

The present invention relates to a cosmetic composition for blocking ultraviolet rays, which contains a water-soluble organic ultraviolet ray blocking agent and a water-soluble thickening agent in a water phase and contains an oil-soluble organic ultraviolet ray blocking agent and an oil thickening agent in an oil phase, thereby preventing uniting of emulsified particles of an oil-in-water (O / W) dosage form. According to the present invention, the problem of phase separation due to long-term storage or high-temperature storage is solved, phase stability is improved, and since only the organic ultraviolet blocking agent is contained, clouding is significantly reduced, a sufficient ultraviolet blocking index is exhibited, and a feeling of use is excellent.

Description

Technical Field

[0001] The present invention relates to a cosmetic composition for blocking ultraviolet rays, which contains a water-soluble organic ultraviolet blocker and a water-soluble thickener in an aqueous phase, and contains an oil thickener and an oil-soluble organic ultraviolet blocker in an oil phase, thereby preventing the emulsified particles of an oil-in-water (O / W) formulation from being united, thereby solving the phase separation problem caused by long-term storage or high-temperature storage, improving phase stability, and because only the organic ultraviolet blocker is contained, the white turbidity is significantly reduced, showing a sufficient ultraviolet blocking index, and at the same time, having an excellent feeling in use. Background Art

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

[0003] Generally speaking, ultraviolet rays are classified into UV-A, UV-B, and UV-C according to their wavelengths, with wavelengths of 320 to 400 nm being classified as UV-A, wavelengths of 280 to 320 nm being classified as UV-B, and wavelengths of 200 to 280 nm being classified as UV-C. It is well known that UV-A penetrates into the dermis of the skin, induces skin cancer, and promotes wrinkle and melanin formation, thereby inducing skin aging and skin irritation, and UV-B penetrates into the epidermis of the skin, inducing erythema, freckles, or edema, etc. UV-C passes through the ozone layer but cannot reach the ground surface and disappears.

[0004] In order to prevent or improve the above-mentioned skin diseases associated with sun exposure, consumers are increasingly interested in UV blocking products. As a result, UV blocking products with various UV blocking factors (SPF) have been launched. Generally speaking, UV blocking products contain inorganic UV blocking agents such as titanium dioxide or zinc oxide, or organic UV blocking agents such as ethylhexyl methoxycinnamate, ethylhexyl salicylate, octocrylene, ethylhexyl triazine, bis-ethylhexyloxyphenol methoxyphenyl triazine, or diethylaminohydroxybenzoyl hexyl benzoate in order to show a higher SPF value.

[0005] Among them, the UV blocking cosmetics containing inorganic UV blockers have the disadvantage of causing white turbidity when applied to the skin. For this reason, various technologies containing only organic UV blockers have been developed in the past. Organic UV blockers are again classified into water-soluble organic UV blockers (water-soluble organic sunscreens) and oil-soluble organic UV blockers (oil-soluble organic sunscreens), and various technologies of UV blocking compositions of O / W or W / O formulations are known in the past.

[0006] As is known to all, in terms of the feeling of use, the water-in-oil (W / O) formulation is heavier, while the oil-in-water (O / W) formulation is lighter and fresher. However, the oil-in-water (O / W) formulation UV blocking cosmetics that contain oil-soluble organic sunscreens in the discontinuous phase, i.e., the internal phase, have the problem of generating pores during the coating process and being unable to be evenly applied to the skin, so the UV blocking effect is insufficient. In order to solve this problem, when a water-soluble organic sunscreen is contained in the external phase, i.e., the aqueous phase, the thickener contained in the external phase for the stability of the emulsion (emulsification) is affected by the salt contained in the aqueous phase due to the water-soluble organic sunscreen, and its function is reduced. As a result, the stability of the emulsion (emulsification) is reduced, and problems such as phase separation occur. The thickeners that cause this problem include those that expand (extending) in the form of random coils while being neutralized by pH adjustment (alkaline agent) to achieve a thickening effect. Specifically, the backbone of thickeners such as Carbopol, which exist in the form of random coils, is neutralized by alkaline substances in the aqueous solution phase to form an extending form, thereby realizing a thickening system. However, due to the salt contained in the aqueous phase, the backbone of the thickener is re-curled into a random coil form, and the thickening system collapses, thereby causing the unification of emulsified particles and phase separation, resulting in problems of reduced viscosity and hardness.

[0007] Therefore, there are known existing documents such as "UV-blocking cosmetic composition containing a water-soluble thickener to improve emulsification stability and feel in use (Korean registered patent No. 10-1466649)", "Functional cosmetic composition containing two water-soluble thickeners to be cool, refreshing and UV-blocking (Korean registered patent No. 10-2033473)". However, the composition containing a thickener only in the water phase still has the problem of easily generating pores when applied to the skin, so the UV-blocking effect is uneven. In addition, due to the interaction between the salt and the thickener, the function of the thickener is reduced, so that the phase separation phenomenon of the composition may occur, which is not preferred in terms of safety. That is, the prior art has limitations in achieving cosmetics that fully exhibit excellent UV-blocking effects while improving the feel in use and stability.

[0008] Therefore, there is a need for a technology that can solve the problem of reduced phase stability due to the interaction between salt and thickener in an oil-in-water type UV blocking cosmetic composition containing a water-soluble UV blocking agent.

[0009] [Prior art literature]

[0010] [Patent Document]

[0011] (Patent Document 001) Korean Registered Patent No. 10-1466649

[0012] (Patent Document 002) Korean Registered Patent No. 10-2033473 Summary of the invention

[0013] [Technical issues]

[0014] The present invention aims to provide an O / W type UV blocking cosmetic containing a water-soluble organic sunscreen in an aqueous phase, which can improve phase stability and feel during use while exhibiting a sufficient UV blocking effect without white turbidity.

[0015] [Technical solutions]

[0016] As a means for solving the above-mentioned problems, the present invention provides a cosmetic composition for blocking ultraviolet rays, which includes an aqueous phase containing a water-soluble organic ultraviolet blocker and a water-soluble thickener, and an oil phase containing an oil thickener and an oil-soluble ultraviolet blocker, and is an oil-in-water (O / W) formulation.

[0017] Hereinafter, the ultraviolet blocking cosmetic composition of the present invention will be described in more detail.

[0018] In the present invention, in order to prevent the white turbidity phenomenon, the composition of the present invention may contain less than 1%, less than 0.5%, less than 0.1% of an inorganic UV blocker relative to the total weight of the composition, or may contain substantially no inorganic UV blocker.

[0019] The prior art discloses "an ultraviolet blocking cosmetic composition containing a water-soluble thickener to improve emulsification stability and feeling of use (Korean registered patent No. 10-1466649)" and "an oil-in-water cosmetic composition in a solid stick form containing a water-soluble thickener to provide cooling, refreshing and ultraviolet blocking properties (Korean registered patent No. 10-2033473)". However, the above prior art aims to prepare and add a water-soluble thickener in the form of a water-in-oil type or a water-soluble thickener containing a plant-derived thickener, thereby improving the stability of the emulsion, enhancing the hardness of the composition or preventing syneresis only by the water-soluble thickener, and evaluating the stability improvement with the naked eye.

[0020] On the other hand, in a specific example of the present invention, for preparing a UV blocking cosmetic composition, only an organic UV blocker is included, so that the turbidity phenomenon is significantly reduced, and the color difference meter and spectrophotometer (Spectrophotometer) are analyzed to confirm that even if the visible light transmittance is significantly increased, the UV blocking efficiency is excellent. In addition, it is confirmed that a thickener is included in the water phase and the oil phase, respectively, to improve the uniformity of the emulsified particles, inhibit the Ostwald ripening phenomenon caused by the uneven particle size, delay the unification between particles, and finally improve the phase stability, so that there will be no separation phenomenon, thereby significantly improving the formulation stability.

[0021] In the present invention, the water-soluble organic ultraviolet blocker can be selected from, but not limited to, phenylbenzimidazole sulfonic acid or terephthalylidene dicamphor sulfonic acid. The organic ultraviolet blocker can be any water-soluble organic substance used to block ultraviolet rays without limitation.

[0022] Although not limited to this, in a specific example of the present invention, the above-mentioned composition of the present invention may contain 0.01 to 20 parts by weight, for example, 0.01 to 0.1 parts by weight, 0.01 to 1 parts by weight, 0.01 to 2.5 parts by weight, 0.01 to 5 parts by weight, 0.01 to 10 parts by weight, 0.01 to 15 parts by weight, 0.01 to 20 parts by weight, 0.1 to 1 parts by weight, 0.1 to 2.5 parts by weight, 0.1 to 5 parts by weight, 0.1 to 10 parts by weight, 0.1 to 15 parts by weight, 0.1 to 20 parts by weight, 1 to 2.5 parts by weight, or 1 to 5 parts by weight, 1 to 10 parts by weight, 1 to 15 parts by weight, or 1 to 20 parts by weight of a water-soluble organic UV blocker, relative to the total weight of the composition.

[0023] When the content of the water-soluble organic UV blocker of the present invention in the entire composition is less than 0.01 parts by weight, a sufficient UV blocking effect cannot be expected, and when the content exceeds 20 parts by weight, undesirable reactions such as allergies may occur or there may be problems with skin safety, so it is to prevent such problems.

[0024] In the present invention, the water-soluble thickener used is a water-soluble thickener having a hydrophobic group.

[0025] The water-soluble thickener having a hydrophobic group may be one or more selected from the group consisting of acrylate / C10-30 alkyl acrylate crosspolymer, sodium polyacrylate, sodium polyacryloyldimethyl taurate, sodium acrylate / beheneth-25 methacrylate crosspolymer, sodium acrylate / sodium acryloyldimethyltaurate copolymer, sodium acrylate / acryloyldimethyltaurate / dimethylacrylamide crosspolymer, acrylate / beheneth-25 methacrylate copolymer, acrylate copolymer, ammonium acryloyldimethyltaurate / beheneth-25 methacrylate crosspolymer, ammonium acryloyldimethyltaurate / VP copolymer, polyacrylate-13, polyacrylate crosspolymer-6, polyacrylamide, PEG-240 / HDI copolymer bis-decyltetradecyl alcohol polyether-20 ether, and hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer. Preferably, the use of a water-soluble thickener containing a hydrophobic group can be beneficial to improve the stability of the composition.

[0026] Although not limited thereto, in a specific example of the present invention, the composition of the present invention may contain 0.001 to 5 parts by weight, for example, 0.001 to 0.01 parts by weight, 0.001 to 0.1 parts by weight, 0.001 to 1 parts by weight, 0.001 to 2.5 parts by weight, 0.001 to 5 parts by weight, 0.01 to 0.1 parts by weight, 0.01 to 1 parts by weight, 0.01 to 2.5 parts by weight, 0.01 to 5 parts by weight, 0.1 to 1 parts by weight, 0.1 to 2.5 parts by weight, 0.1 to 5 parts by weight, 1 to 2.5 parts by weight, or 1 to 5 parts by weight of a water-soluble thickener, relative to the total weight of the composition.

[0027] When the content of the water-soluble thickener of the present invention in the entire composition is less than 0.001 parts by weight, improvement in the phase stability of the composition cannot be expected, and when the content exceeds 5 parts by weight, undesirable reactions such as a heavy coating feeling or allergies may occur or there may be problems in skin safety, so such problems are prevented.

[0028] In the system for thickening the water phase, when salt is included in the water phase, it may be neutralized by alkaline substances, causing the expanded thickener main chain to re-curl into a random coil, so the thickener effect may be hindered. Therefore, in the present invention, in order to supplement the thickening system, the thickening system is also introduced into the oil phase. In order to thicken the oil phase, the oil thickener can be selected and include an organic oil thickener or an inorganic oil thickener. In the present invention, the oil thickener can be selected from the group consisting of polyamide-8, dextrin palmitate, dextrin palmitate / ethylhexanoate, stearyl inulin, polyurethane-79, dibutyl ethylhexanoyl glutamide, dibutyl lauroyl glutamide, poly C10-30 alkyl acrylate, and poly C10-30 alkyl acrylate. The oil thickener may be selected from the group consisting of, but not limited to, quaternary ammonium methyl ammonium hectorite ...

[0029] By including an oil thickener in the internal phase, the emulsified particles can exhibit a uniform size ranging from 0.01 to 30 μm.

[0030] Although not limited thereto, in a specific example of the present invention, the composition of the present invention may contain 0.01 to 15 parts by weight, for example 0.01 to 0.1 parts by weight, 0.01 to 1 parts by weight, 0.01 to 2.5 parts by weight, 0.01 to 5 parts by weight, 0.01 to 10 parts by weight, 0.01 to 15 parts by weight, 0.1 to 1 parts by weight, 0.1 to 2.5 parts by weight, 0.1 to 5 parts by weight, 0.1 to 10 parts by weight, 0.1 to 15 parts by weight, 1 to 2.5 parts by weight, or 1 to 5 parts by weight, 1 to 10 parts by weight, or 1 to 15 parts by weight of an oil thickener, relative to the total weight of the composition.

[0031] When the content of the oil thickener of the present invention in the entire composition is less than 0.01 parts by weight, improvement in the phase stability of the composition cannot be expected, and when the content exceeds 15 parts by weight, undesirable reactions such as a heavy, dull, or greasy feeling during use or allergies may occur or there may be problems in skin safety, so such problems are prevented.

[0032] In the present invention, the oil-soluble organic ultraviolet blocker can be selected from the group consisting of butyl methoxydibenzoylmethane, diethylaminohydroxybenzoyl hexyl benzoate, ethylhexyl triazone, diethylhexyl butamido triazone, bis-ethylhexylhexyloxyphenol methoxyphenyl triazine, drometrizole trisiloxane, methylene bis-benzotriazolyl tetramethylbutylphenol and tris-biphenyl triazine, but is not limited thereto. The organic ultraviolet blocker can be applied without limitation to all oil-soluble organic substances used to block ultraviolet rays.

[0033] Although not limited to this, in a specific example of the present invention, the above-mentioned composition of the present invention may contain 0.01 to 20 parts by weight, for example, 0.01 to 0.1 parts by weight, 0.01 to 1 parts by weight, 0.01 to 2.5 parts by weight, 0.01 to 5 parts by weight, 0.01 to 10 parts by weight, 0.01 to 15 parts by weight, 0.01 to 20 parts by weight, 0.1 to 1 parts by weight, 0.1 to 2.5 parts by weight, 0.1 to 5 parts by weight, 0.1 to 10 parts by weight, 0.1 to 15 parts by weight, 0.1 to 20 parts by weight, 1 to 2.5 parts by weight, or 1 to 5 parts by weight, 1 to 10 parts by weight, 1 to 15 parts by weight, or 1 to 20 parts by weight of an oil-soluble organic UV blocker, relative to the total weight of the composition.

[0034] When the content of the oil-soluble organic UV blocker of the present invention in the entire composition is less than 0.01 parts by weight, a sufficient UV blocking effect cannot be expected, and when the content exceeds 20 parts by weight, undesirable reactions such as allergies may occur or there may be problems with skin safety, so this is to prevent such problems.

[0035] The oil-soluble ultraviolet blocker of the present invention can preferably be a material that is solid at room temperature. At room temperature, a solid ultraviolet blocker has an advantage of having a superior ultraviolet blocking efficiency compared to a liquid ultraviolet blocker.

[0036] In the present invention, the emulsifier preferably comprises a polyglycerol-based emulsifier, and the PEG-based emulsifier is preferably contained in an amount of less than 1%, less than 0.5%, less than 0.1%, or substantially not contained.

[0037] The polyglyceryl emulsifier of the present invention uses one or more selected from the group consisting of polyglyceryl-3 methyl glucose distearate, polyglyceryl-3 distearate, polyglyceryl-4 caprate, polyglyceryl-6 stearate, polyglyceryl-6 behenate, polyglyceryl-6 dicaprate, and polyglyceryl-6 laurate. Although not limited to this, in a specific example of the present invention, relative to the total weight of the composition, the composition of the present invention may contain 0.01 to 10 parts by weight, such as 0.01 to 0.1 parts by weight, 0.01 to 1 parts by weight, 0.01 to 2.5 parts by weight, 0.01 to 5 parts by weight, 0.01 to 10 parts by weight, 0.1 to 1 parts by weight, 0.1 to 2.5 parts by weight, 0.1 to 5 parts by weight, 0.1 to 10 parts by weight, 1 to 2.5 parts by weight, 0.1 to 5 parts by weight, 1 to 10 parts by weight of polyglyceryl emulsifier.

[0038] When the content of the polyglycerol-based emulsifier of the present invention in the entire composition is less than 0.01 parts by weight, the emulsifying function in the composition cannot be expected, and when the content exceeds 10 parts by weight, undesirable reactions such as increased hardness, phase separation or allergies may occur or there may be problems in skin safety, so it is intended to prevent such problems.

[0039] In the present invention, the cosmetic composition can be in the form of a general emulsified formulation and a soluble formulation. For example, it can have a formulation such as an emulsion such as a facial milk, a body milk, a cream such as a nutrient cream, a moisturizing cream, an eye cream, an essence, a cosmetic ointment, a balm, a spray, a gel, a facial mask, a sunscreen, a base before makeup, a liquid, solid or spray type foundation, a powder, etc.

[0040] In addition, the above-mentioned cosmetics may further contain auxiliary agents commonly used in the field of cosmetics in the composition of the present invention, such as fatty substances, organic solvents, solubilizers, concentrators and gelling agents, softeners, antioxidants, suspending agents, stabilizers, foaming agents, fragrances, surfactants, water, ionic or non-ionic emulsifiers, fillers, metal ion blockers and chelating agents, preservatives, vitamins, blocking agents, wetting agents, essential oils, dyes, pigments, hydrophilic or lipophilic active agents, lipid vesicles or any other ingredients commonly used in cosmetics.

[0041] In a specific example, the cosmetic composition may be transparent or translucent. In this case, the properties are evaluated by applying each composition to a glass plate to 3 μm, then placing it on a paper with text written on it, and confirming the text on the other side (Experimental Example 4). The case where the text is clearly visible is defined as "transparent"; the case where the text looks blurry but readable is defined as "translucent"; the case where the text is invisible or cannot be read even if it is visible and therefore its meaning cannot be understood is defined as "opaque".

[0042] The cosmetic composition of the present invention can be used according to conventional methods of use, and the frequency of use can be changed according to the skin condition or preference of the user.

[0043] Each of the above-mentioned ingredients contained in the cosmetic composition of the present invention may be contained in the cosmetic composition of the present invention preferably within the range not exceeding the maximum usage amount specified in the relevant provisions of the "Cosmetic Use Permit" stipulated by the governments of various countries.

[0044] In addition, the present invention provides a method for preparing a cosmetic composition comprising a water-soluble organic UV blocker and a water-soluble thickener in a water phase, and an oil thickener and an oil-soluble organic UV blocker in an oil phase.

[0045] Hereinafter, the constitution of the preparation method of the present invention will be described in detail.

[0046] The preparation method of the present invention may include: a step of preparing an aqueous phase comprising a water-soluble organic UV blocker and a water-soluble thickener; a step of preparing an oil phase comprising an oil-soluble organic UV blocker and an oil thickener; and a step of homogeneously mixing the aqueous phase and the oil phase to prepare an oil-in-water (O / W) formulation of a UV-blocking cosmetic composition.

[0047] The step of preparing the oil phase may further include the step of adding a polyglycerol emulsifier.

[0048] According to the present invention, in the step of preparing the cosmetic composition, excellent formulation stability of the oil-in-water composition can be achieved by homogeneously mixing.

[0049] [Effects of the Invention]

[0050] The ultraviolet light blocking cosmetic composition of the present invention comprises a water-soluble organic ultraviolet light blocking agent and a water-soluble thickener in the water phase, and comprises an oil thickener and an oil-soluble organic ultraviolet light blocking agent in the oil phase, thereby preventing the emulsified particles of the oil-in-water (O / W) formulation from coalescing, thereby solving the phase separation problem caused by long-term storage or high-temperature storage, improving phase stability, and since only the organic ultraviolet light blocking agent is included, white turbidity will not occur, a sufficient ultraviolet light blocking index is exhibited, and an excellent feeling of use is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is a photograph of the stability results of the ultraviolet blocking cosmetic composition of one embodiment of the present invention after high temperature storage.

[0052] Figure 2 This is a microscopic observation photograph of the ultraviolet shielding cosmetic composition of one example of the present invention immediately after preparation.

[0053] Figure 3 This is a graph showing the results of particle size analysis of the ultraviolet blocking cosmetic composition of one embodiment of the present invention immediately after preparation.

[0054] Figure 4 This is an exemplary diagram for explaining the principle of improving the ultraviolet blocking efficiency of the ultraviolet blocking cosmetic composition according to one embodiment of the present invention.

[0055] Figure 5 This is a photograph showing the results of visual evaluation of the white turbidity of the ultraviolet blocking cosmetic composition according to one example of the present invention.

[0056] Figure 6 This is a graph showing the results of measuring the white turbidity and visible light transmittance of an ultraviolet blocking cosmetic composition according to one embodiment of the present invention. DETAILED DESCRIPTION

[0057] Hereinafter, the present invention is described in detail by the following examples. However, the following examples are only used to illustrate the present invention, and the content of the present invention is not limited to the following examples.

[0058] Specific examples of the ultraviolet shielding cosmetic composition of the present invention are shown below.

[0059] Experimental Example 1. Confirmation of the stability improvement effect of a cosmetic composition comprising a water-soluble thickener containing a hydrophobic group, an oil thickener, and a water-soluble ultraviolet blocker

[0060] In order to confirm the phase stability of the cosmetic composition containing the water-soluble ultraviolet blocker of the present invention, Comparative Examples 1 to 3 and Example 1 were prepared according to the compositions and contents of Table 1 below, and the stability at high temperatures was compared.

[0061] [Table 1]

[0062]

[0063] Specifically, each composition was evaluated using the following evaluation method.

[0064] Evaluation 1. Evaluation based on naked eyes

[0065] After each composition was stored in a constant temperature room at 50°C for 2 weeks and 4 weeks, the phase stability was evaluated with the naked eye. The results are shown in Table 2. The appearance of each composition of Comparative Example 1 and Example 1 after being stored in a constant temperature room at 50°C for 4 weeks is shown in Table 2. Figure 1 shown.

[0066] [Table 2]

[0067]

[0068] In the above results, it can be seen from the results of Comparative Examples 1 and 2 that if a water-soluble thickener is not used together with an oil thickener, phase separation occurs at high temperatures even if a water-soluble thickener containing a hydrophobic group or a water-soluble thickener containing no hydrophobic group is used. In addition, it can be seen from the results of Comparative Example 3 and Example 1 that even if a water-soluble thickener is used together with an oil thickener, separation occurs at high temperatures as in Comparative Example 3 if a water-soluble thickener containing no hydrophobic group is used.

[0069] Evaluation 2. Evaluation based on particle analysis

[0070] The emulsified particle sizes of the compositions of Comparative Example 1 and Example 1 were analyzed using a microscope or a particle size analyzer (Mastersizer) immediately after preparation. The results are as follows: Figures 2 to 3 shown.

[0071] As a result, when the emulsified particles of Comparative Example 1 and Example 1 were observed immediately after preparation, it was found that the particle shape of Example 1 was more uniform under a microscope than that of Comparative Example 1 ( Figure 2 ), and the size of the emulsified particles on the particle size analyzer (Mastersizer) is smaller and the deviation of the particle size distribution is smaller ( Figure 3 ). It is believed that the difference in the distribution of emulsified particles resulted in the following Figure 1 The results shown show that a cosmetic comprising a water-soluble thickener containing a hydrophobic group in the water phase and an oil thickener in the oil phase as in the present invention is more stable than before.

[0072] Experimental Example 2. Confirmation of the stability of a composition containing a water-soluble ultraviolet blocker according to the types of a water-soluble thickener containing a hydrophobic group and an oil thickener

[0073] In order to confirm the phase stability of the composition containing a water-soluble ultraviolet blocker according to the type of the water-soluble thickener containing a hydrophobic group and the type of the oil thickener, Examples 2 to 12 were prepared according to the compositions and contents of Tables 3 to 5 below, and compared whether they were stable at high temperatures.

[0074] Specifically, after the prepared composition was stored in a thermostatic chamber at 50° C. for 4 weeks, the phase stability was visually evaluated, and the results are included in Tables 3 to 5, where no phase separation was evaluated as “stable” and where phase separation was evaluated as “separated”.

[0075] [Table 3]

[0076]

[0077] [Table 4]

[0078]

[0079] [Table 5]

[0080]

[0081] From the results of Tables 3 to 5, it can be seen that the composition containing the water-soluble ultraviolet blocker is also stable even if it contains a different kind of water-soluble thickener containing a hydrophobic group than that of Example 1 or a different kind of oil thickener.

[0082] Experimental Example 3: Confirmation of the UV blocking efficiency improvement effect of a cosmetic composition comprising a water-soluble thickener containing a hydrophobic group, an oil thickener, and a water-soluble UV blocking agent

[0083] In order to confirm whether the cosmetic composition of the present invention, which is stable even when containing a water-soluble UV blocker phase, has an increased UV blocking efficiency compared to a cosmetic composition containing only an oil-soluble UV blocker due to phase stability, Comparative Example 4 and Example 13 were prepared according to the same composition and content as in Table 6 below, and their respective UV blocking efficiencies were confirmed.

[0084] Specifically, each composition was mixed at 1.3 mg / cm 2 The film was coated on a PMMA plate (HelioScreen Labs, HD6), dried at room temperature for 15 minutes, and then the in vitro SPF was measured by SPF-290AS (Solar light, USA) and calculated by the following formula. The measured in vitro SPF value and the calculated UV blocking efficiency value are included in Table 6.

[0085]

[0086] [Table 6]

[0087]

[0088] From the results of Table 6, it can be confirmed that when both the water-soluble ultraviolet blocker and the oil-soluble ultraviolet blocker are contained, the ultraviolet blocking efficiency is higher than when only the oil-soluble ultraviolet blocker is contained.

[0089] Figure 4 This shows the principle that Example 13 can achieve the same level of SPF value as Comparative Example 4 even with a smaller amount of ultraviolet blocker. If the cosmetic composition is applied to the skin, the inner phase and the outer phase that are temporarily combined due to emulsification will separate again. At this time, it is understood that, as in Example 13, if the ultraviolet blocker is uniformly contained in the inner phase and the outer phase, the pores generated after application, that is, the area without ultraviolet blocker, are reduced, thereby improving the ultraviolet blocking efficiency.

[0090] Experimental Example 4: Confirmation of the white turbidity improving effect of a cosmetic composition comprising a water-soluble thickener containing a hydrophobic group, an oil thickener, and a water-soluble ultraviolet blocker

[0091] In order to compare the white turbidity improving effect of the cosmetic composition of the present invention, Comparative Example 5 was prepared according to the same composition and content as in Table 7, and the white turbidity was compared with that of Example 1.

[0092] [Table 7]

[0093]

[0094] Specifically, each composition was evaluated using the following evaluation method.

[0095] Evaluation 1. Evaluation based on naked eyes

[0096] Each composition was coated on a glass plate to a thickness of 3 μm, and then placed on a paper with text written on it, and the text on the other side was evaluated to see whether it could be recognized. Figure 5 As shown. The evaluation results show that Example 1 has better transparency than Comparative Example 5, so the text on the other side can be confirmed, but Comparative Example 5 is not transparent, so the text on the other side cannot be confirmed. Generally speaking, the higher the turbidity, the stronger the white turbidity appears, so it is expected that Example 1 will have less white turbidity than Comparative Example 5.

[0097] Evaluation 2. Evaluation based on a colorimeter

[0098] Each composition was coated on a glass plate to 3 μm and then measured using a colorimeter (CR-400, MINOLTA, Japan), and then the measured value was substituted into the following formula to calculate the white turbidity, which is then shown in Table 8.

[0099] White turbidity (W) = 100-[(100-L*)2 +(a*) 2 +(b*) 2 ] 1 / 2

[0100] [Table 8]

[0101] Example 1 Comparative Example 5 White turbidity (W) 21.7 56.6

[0102] As a result, it was confirmed that Example 1 had a significantly lower white turbidity than Comparative Example 5, as was the case with the subjective evaluation by naked eyes and also from the objective measurement results using a colorimeter.

[0103] Evaluation 3. Evaluation based on visible light transmittance

[0104] Each composition was coated on a glass plate to 3 μm, and then the transmittance in the visible light region (400-990 nm) was measured using a spectrophotometer (Varioskan LUX, thermos scientific, USA), and the transmittance area across the above wavelength range was calculated for comparison. The transmittance measurement results are shown in Figure 6 The calculated transmittance areas are shown in Table 9.

[0105] [Table 9]

[0106] Example 1 Comparative Example 5 Transmittance area 363.89 60.16

[0107] As a result, it was confirmed that the light transmittance of Example 1 was higher than that of Comparative Example 5 in the entire 400-990 nm region, and that the transmittance area was significantly higher, so it was confirmed that Example 1 had the best transparency during coating.

[0108] Industrial availability

[0109] The ultraviolet light blocking cosmetic composition of the present invention comprises a water-soluble organic ultraviolet light blocking agent and a water-soluble thickener in the water phase, and comprises an oil thickener and an oil-soluble organic ultraviolet light blocking agent in the oil phase, thereby preventing the emulsified particles of the oil-in-water (O / W) formulation from coalescing, thereby solving the phase separation problem caused by long-term storage or high-temperature storage, improving phase stability, and since only the organic ultraviolet light blocking agent is included, white turbidity will not occur, a sufficient ultraviolet light blocking index is exhibited, and an excellent feeling of use is achieved.

Claims

1. A UV blocking cosmetic composition, which is an oil-in-water (O / W) formulation comprising an aqueous phase containing a water-soluble organic UV blocker and a water-soluble thickener and an oil phase containing an oil-soluble organic UV blocker and an oil thickener.

2. The ultraviolet light blocking cosmetic composition according to claim 1, in, The water-soluble organic ultraviolet blocking agent is at least one selected from the group consisting of phenylbenzimidazole sulfonic acid and terephthalylidene dicamphor sulfonic acid.

3. The ultraviolet light blocking cosmetic composition according to claim 2, in, The content of the water-soluble organic ultraviolet blocking agent is in the range of 0.01 wt % to 20 wt % based on the entire composition.

4. The ultraviolet light blocking cosmetic composition according to claim 1, in, The above-mentioned water-soluble thickener is a water-soluble thickener having a hydrophobic group.

5. The ultraviolet light blocking cosmetic composition according to claim 4, in, The water-soluble thickener having a hydrophobic group is one or more selected from the group consisting of acrylates / C10-30 alkyl acrylate crosspolymer, sodium polyacrylate, sodium polyacryloyldimethyl taurate, sodium acrylate / beheneth-25 methacrylate crosspolymer, sodium acrylate / sodium acryloyldimethyl taurate copolymer, sodium acrylate / acryloyldimethyl taurate / dimethylacrylamide crosspolymer, acrylates / beheneth-25 methacrylate copolymer, acrylate copolymer, ammonium acryloyldimethyl taurate / beheneth-25 methacrylate crosspolymer, ammonium acryloyldimethyl taurate / VP copolymer, polyacrylate-13, polyacrylate crosspolymer-6, polyacrylamide, PEG-240 / HDI copolymer bis-decyltetradecyl alcohol polyether-20 ether and hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer.

6. The ultraviolet light blocking cosmetic composition according to claim 5, in, The content of the above water-soluble thickener is in the range of 0.001 wt % to 5 wt % based on the entire composition.

7. The ultraviolet light blocking cosmetic composition according to claim 1, in, The oil thickener is one or more selected from the group consisting of Polyamide-8, Dextrin Palmitate, Dextrin Palmitate / Ethylhexanoate, Stearoyl Inulin, Polyurethane-79, Dibutyl Ethylhexanoyl Glutamide, Dibutyl Lauroyl Glutamide and Poly C10-30 Alkyl Acrylate.

8. The ultraviolet light blocking cosmetic composition according to claim 7, in, The content of the above oil thickener is in the range of 0.01 wt % to 15 wt % based on the entire composition.

9. The ultraviolet light blocking cosmetic composition according to claim 1, in, The oil-soluble organic ultraviolet blocker is one or more selected from the group consisting of Butyl Methoxydibenzoylmethane, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Ethylhexyl Triazone, Diethylhexyl ButamidoTriazone, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Drometrizole Trisiloxane, Methylene Bis-Benzotriazolyl Tetramethylbutylphenol and Tris-Biphenyl Triazine.

10. The ultraviolet light blocking cosmetic composition according to claim 9, in, The content of the above oil-soluble organic ultraviolet blocking agent is in the range of 0.01 wt % to 20 wt % based on the entire composition.

11. The ultraviolet light blocking cosmetic composition according to claim 1, in, The oil phase of the above composition further comprises a polyglyceryl emulsifier.

12. The ultraviolet light blocking cosmetic composition according to claim 11, in, The polyglyceryl emulsifier is at least one selected from the group consisting of polyglyceryl-3 methylglucose distearate, polyglyceryl-3 distearate, polyglyceryl-4 caprate, polyglyceryl-6 stearate, polyglyceryl-6 behenate, polyglyceryl-6 dicaprate, and polyglyceryl-6 laurate.

13. The ultraviolet light blocking cosmetic composition according to claim 11, in, The content of the above-mentioned polyglyceryl emulsifier is in the range of 0.01 wt% to 10 wt% based on the entire composition.

14. The ultraviolet light blocking cosmetic composition according to claim 1, in, The cosmetic composition does not contain any inorganic ultraviolet blocking agent and thus does not have any white turbidity.

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