Cosmetic composition having lamellar liquid crystal structure by using polyol

Abstract

The present invention relates to a cosmetic composition having a lamellar liquid crystal structure by using polyol. The cosmetic composition comprises polyol, a surfactant, a higher alcohol, and a thickener to form a stable lamellar liquid crystal structure. In addition, due to inclusion of the high content of polyol, a moisture retention capacity is excellent and moisturizing persistence can be improved.

Description

Cosmetic composition having a lamellar liquid crystal structure using polyol

[0001] This patent application claims priority to Republic of Korea Patent Application No. 10-2023-0169075, filed with the Korean Intellectual Property Office on November 29, 2023, the disclosure of which is incorporated herein by reference.

[0002] The present invention relates to a cosmetic composition having a lamellar liquid crystal structure using a polyol.

[0003] In modern industrial fields, skin is an important research subject not only in the cosmetics industry but also in the food, pharmaceutical, and bio industries. Along with functional cosmetics such as skin whitening, skin wrinkle improvement, and UV protection, the derma cosmetic industry for skin health is rapidly growing along with recent developments in the cosmetics and pharmaceutical fields.

[0004] With growing interest in and market expansion of functional cosmetics, various cosmetic formulations for skin improvement are being researched and developed. Specifically, ceramides are being used to strengthen the barrier function of the stratum corneum, which helps maintain moisture, and liposomes and liquid crystals containing beneficial substances that can penetrate the epidermis are being developed.

[0005] Liquid crystals (LCs) are phases that possess both solid and liquid properties. They are also called mesophases, a combination of the words "mesos," meaning "middle," and "morphe," meaning "form." In the cosmetics industry, liquid crystals were initially used to stabilize emulsions, which combine two immiscible liquids to form a colloidal state. However, with technological advancements, they have gradually evolved to encompass skin barrier protection and enhanced skin absorption. Recently, liquid crystal technology is being developed to enable a variety of cosmetic formulations and skin benefits.

[0006] Liquid crystals are formed by surfactants, and their shape is determined by the curvature and critical packing parameter (CPP) that occur when molecules are aligned. When a surfactant is dissolved in another solvent, hydrophilic molecules on the solvent surface are oriented toward water due to adsorption, while hydrophobic molecules are aligned toward the outside of the surface. Afterwards, as the concentration of the surfactant continues to increase, the solution surface becomes saturated with the surfactant, the surface tension no longer decreases, and the hydrophilic molecules of the surfactant are aligned toward the outside, and the hydrophobic molecules are aligned toward the inside, forming a spherical association called a micelle. The minimum concentration of surfactant that forms micelles is called the critical micelle concentration (CMC), and when the surfactant increases above the CMC, the CPP increases, forming lamellar, cubic, or hexagonal lyotropic liquid crystals, and ultimately forming reverse micelles.

[0007] Lamellar liquid crystal structures are widely used in cosmetics and pharmaceuticals due to their advantages, including high emulsion stability, controlled release of useful substances such as drugs, ease of manufacture, superior user experience, and moisturizing properties. Lamellar liquid crystal structures possess a plate-like structure composed of phospholipids, an oily film, and an aqueous film, similar to the intercellular lipid structure of the stratum corneum of the skin's epidermis, and are known to prevent moisture evaporation and maintain hydration.

[0008] In the case of general cosmetic emulsions, when the cosmetic is oil-in-water (o / w) and applied to the skin, body temperature causes the moisture in the external surface to evaporate, disrupting the emulsion's balance and weakening its moisturizing power. In the case of water-in-oil (w / o) types, while they have the advantage of maintaining moisturizing power, they have the disadvantage of an unpleasant feeling when applied to the skin due to the oily feeling. However, the lamellar liquid crystal structure has a structure that can solve the shortcomings of both oil-in-water and water-in-oil types.

[0009] In cosmetics, ceramide is used to increase moisturizing power by utilizing the lamellar liquid crystal structure, but ceramide is difficult to stabilize, so when forming a lamellar liquid crystal structure, emulsion stability is low, and when using a high content for this purpose, a liquid crystal form is not formed, so there are problems such as using a large amount of surfactant, etc. Therefore, there is a growing need for the development of a new formulation that can increase moisturizing and skin soothing effects while forming a stable lamellar liquid crystal structure.

[0010] In order to solve the above problems, the present invention aims to provide a cosmetic composition having a lamellar liquid crystal structure that has excellent moisture retention capacity and improved moisture retention by using a high content of polyol.

[0011] To achieve the above purpose, the present invention provides a cosmetic composition having a lamellar liquid crystal structure comprising a polyol, a surfactant, a higher alcohol, and a thickener.

[0012] The cosmetic composition having a lamellar liquid crystal structure using the polyol of the present invention comprises a polyol, a surfactant, a higher alcohol, and a thickener to form a stable lamellar liquid crystal structure. Furthermore, the high content of polyol provides excellent moisture retention and enhances moisturizing properties.

[0013] FIG. 1 shows observation photographs of one embodiment (Example 1, Example 3, and Example 4) of the present invention taken with an optical microscope (Example 1: A, Example 3: C, and Example 4: E) and a polarizing microscope (Example 1: B, Example 3: D, and Example 4: F).

[0014] Figure 2 shows observation photographs of comparative examples (Comparative Example 1 and Comparative Example 2) of the present invention taken with an optical microscope (Comparative Example 1: A and Comparative Example 2: C) and a polarizing microscope (Comparative Example 1: B and Comparative Example 2: D).

[0015] Figure 3 shows the appearance of the composition after 3 months of storage for comparison of liquid crystal stability at low temperature (4°C) after manufacturing Example 4 and Comparative Example 2.

[0016] Figure 4 is a graph showing skin moisture content over time in one embodiment (Example 2 and Example 4) of the present invention and a comparative example (Comparative Example 1).

[0017] Figure 5 is a graph comparing the skin soothing efficacy of one embodiment of the present invention (Example 2 and Example 4) and a comparative example (Comparative Example 1).

[0018] A cosmetic composition having a lamellar liquid crystal structure comprising a polyol, a surfactant, a higher alcohol, and a thickener.

[0019] Hereinafter, the present invention will be described in detail.

[0020] The present invention relates to a cosmetic composition having a lamellar liquid crystal structure comprising a polyol, a surfactant, a higher alcohol, and a thickener.

[0021] In the present invention, the "lamellar liquid crystal structure" may be an emulsion form in which molecular crystals form micelles and form multiple layers in a certain arrangement, and may have an appearance in which oil phase and water phase are sequentially stacked as blocks. In the cosmetic composition of the present invention, the lamellar liquid crystal structure may serve to improve skin moisturizing power by containing a large amount of moisture.

[0022] In the present invention, the "polyol" may refer to an aliphatic compound having a polyvalent alcohol structure, i.e., two or more polar hydroxyl (-OH) groups in its molecular structure, as a raw material used in the manufacture of cosmetics. In general, polyol is used as a preservative by dissolving organic solvents that do not dissolve well in water in the manufacture of cosmetics, and has a sterilizing effect, and when applied to the skin, forms a skin film to block moisture evaporation and reduce the viscosity of the formulation. In the present invention, the polyol may be contained in a high content to stably maintain the lamellar liquid crystal structure while increasing moisture retention capacity.

[0023] In the present invention, the polyol may have at least one carbon number from C3 to C6, but is not limited thereto. A polyol having a carbon number from C3 to C6 has a molecular weight suitable for skin absorption and is suitable for skin absorption, and thus may have excellent skin compatibility and excellent moisturizing power. Specifically, the polyol may be at least one selected from the group consisting of glycerin (C3), propanediol (C3), methylpropanediol (C4), 2,3-butanediol (C4), 1,2-hexanediol (C6), butylene glycol (C4), pentylene glycol (C5), diglycerin (C6), and dipropylene glycol (C6).

[0024] In the present invention, the polyol is present in an amount of 5 to 50 wt%, 5 to 45 wt%, 5 to 40 wt%, 5 to 35 wt%, 10 to 50 wt%, 10 to 45 wt%, 10 to 40 wt%, 10 to 35 wt%, 15 to 50 wt%, 15 to 45 wt%, 15 to 40 wt%, 15 to 35 wt%, 20 to 50 wt%, 20 to 45 wt%, 20 to 40 wt%, 20 to 35 wt%, 25 to 50 wt%, 25 to 45 wt%, 25 to 40 wt%, 25 to 35 wt%, 28 to 35 wt%, 28 to 34 wt%, for example, 30 wt%, 28.5 % by weight, 33.5% by weight. If the polyol exceeds the above range, a problem of reduced long-term storage stability of the composition may occur.

[0025] In the present invention, the polyol may be, for example, one or more of glycerin, pentylene glycol, 1,2-hexanediol, and dipropylene glycol.

[0026] In one embodiment of the present invention, the weight ratio of the glycerin and the dipropylene glycol constituting the polyol may be 1:3 to 3:1, 1:2 to 2:1, for example, 1:2.

[0027] In the present invention, the "surfactant" may refer to a bipolar substance having both hydrophilic and hydrophobic portions within its molecular structure. In the present invention, the surfactant may be dispersed to form a lamellar liquid crystal through a micelle structure.

[0028] In the present invention, the surfactant may be at least one of the olivate series and the oleate series, but is not limited thereto. Specifically, the surfactant may be at least one selected from the group consisting of cetearyl olivate, stearyl olivate, sorbitan olivate, sorbitan oleate, sorbitan stearate, sorbitan isostearate, sorbitan laurate, sorbitan sesquioleate, and sorbitan caprylate.

[0029] In the present invention, the surfactant may be, for example, cetearyl olivate and stearyl olivate. In one embodiment of the present invention, the surfactant may be cetearyl olivate and stearyl olivate in a weight ratio of 3:2.

[0030] In the present invention, the surfactant may be at least one selected from the group consisting of glyceryl stearate, hydrogenated lecithin, polyglyceryl-2 triisostearate, polyglyceryl-3 distearate, polyglyceryl-3 ricinoleate, polyglyceryl-4 oleate, polyglyceryl-4 laurate, polyglyceryl-4 caprate, polyglyceryl-6 oleate, polyglyceryl-6 laurate, polyglyceryl-10 stearate, polyglyceryl-3 methyl glucose distearate, cetearyl glucoside, and glycerin monostearate.

[0031] In the present invention, the surfactant may be included in an amount of 0.1 to 10 wt%, 0.1 to 8 wt%, 0.1 to 6 wt%, 0.1 to 4 wt%, 0.5 to 10 wt%, 0.5 to 8 wt%, 0.5 to 6 wt%, 0.5 to 4 wt%, 1 to 10 wt%, 1 to 8 wt%, 1 to 6 wt%, 1 to 4 wt%, 2 to 10 wt%, 2 to 8 wt%, 2 to 6 wt%, 2 to 4 wt%, for example, 3 wt%, based on the total weight of the composition, and specifically, cetearyl olivate and stearyl olivate. If the above surfactant exceeds the above range, the hardness increases, which may cause a problem of wax precipitation when storing cosmetics at low temperatures. If it is below the above range, the problem of phase separation due to coalescence between droplets may occur due to insufficient surfactant power.

[0032] In the present invention, the higher alcohol may be at least one selected from the group consisting of cetearyl alcohol, cetyl alcohol, stearyl alcohol, lauryl alcohol, behenyl alcohol, and myristyl alcohol, and may be, for example, cetearyl alcohol and cetyl alcohol.

[0033] In the present invention, the "higher alcohol" may refer to an alcohol having 12 to 22 carbon atoms. In the present invention, the higher alcohol may strengthen the interface between the oil phase and the water phase to promote the formation of lamellar liquid crystals and increase the hardness of the emulsion to improve physical stability.

[0034] In the present invention, the higher alcohol may be included in an amount of 0.1 to 10 wt%, 0.1 to 8 wt%, 0.1 to 6 wt%, 0.1 to 4 wt%, 0.1 to 2 wt%, 0.2 to 10 wt%, 0.2 to 8 wt%, 0.2 to 6 wt%, 0.2 to 4 wt%, 0.2 to 2 wt%, 0.5 to 10 wt%, 0.5 to 8 wt%, 0.5 to 6 wt%, 0.5 to 4 wt%, 0.5 to 2 wt%, for example, 1 wt%, based on the total weight of the composition. If the higher alcohol exceeds the above range, the hardness increases, which may cause a problem of wax precipitation when the cosmetic is stored at a low temperature, and if it is less than the above range, a problem of poor lamellar liquid crystal formation may occur.

[0035] In one embodiment of the present invention, the weight ratio of the cetearyl alcohol and the cetyl alcohol constituting the higher alcohol may be included as 4:1.

[0036] In the present invention, the thickener may be at least one selected from the group consisting of xanthan gum, carrageenan, carbomer, hyaluronic acid, polyacrylate, acrylate / C10-30 alkyl acrylate crosspolymer, ammonium acryloyldimethyltaurate / VP copolymer, dextrin, bentonite, disteardimonium hectorite, dimethicone / vinyl dimethicone crosspolymer, hydroxyethyl cellulose, hydroxypropyl methylcellulose, sodium hyaluronate, sodium polyacryloyldimethyltaurate, and ammonium acryloyldimethyltaurate / VP copolymer, and for example, it may be ammonium acryloyldimethyltaurate / VP copolymer.

[0037] In the present invention, the thickener may be included in an amount of 0.01 to 1 wt%, 0.01 to 0.8 wt%, 0.01 to 0.5 wt%, 0.05 to 1 wt%, 0.05 to 0.8 wt%, 0.05 to 0.5 wt%, 0.1 to 1 wt%, 0.1 to 0.8 wt%, 0.1 to 0.5 wt%, 0.2 to 1 wt%, 0.2 to 0.8 wt%, 0.2 to 0.5 wt%, for example, 0.3 wt%, based on the total weight of the composition.

[0038] The cosmetic composition having a lamellar liquid crystal structure according to the present invention may additionally contain a residual amount of water in addition to the polyol, surfactant, higher alcohol, and thickener. In the present invention, the water is used as a solvent and forms an emulsion in which aqueous and oily parts are combined. The water may be distilled water, and the distilled water may be at least one selected from the group consisting of primary distilled water, secondary distilled water, tertiary distilled water, quaternary distilled water, and purified water.

[0039] In the present invention, the composition may additionally include a titrated extract of centella asiatica (TECA), but is not limited thereto.

[0040] The "Centella asiatica" of the above Centella asiatica quantitative extract (TECA) is commonly called "screen" or "tiger herb" and is a perennial, creeping medicinal plant belonging to the Umbelliferae family that mainly grows in South Asia.

[0041] The above Centella asiatica quantitative extract (TECA) may contain asiaticoside, madecassic acid, and asiatic acid. The above asiaticoside and madecassic acid are involved in the production and secretion of collagen, and may have the effect of increasing skin regeneration and dermal elasticity.

[0042] In the present invention, the quantitative extract of Centella asiatica may increase the stability of the liquid crystal structure in forming the lamellar liquid crystal structure of the polyol. Generally, liquid crystal formation is successful when the solubility of the liquid crystal forming substance is maintained at an appropriate level. At this time, the quantitative extract of Centella asiatica, which is a poorly soluble substance, can play a role in maintaining the liquid crystal structure well. Specifically, when a large amount of a polar oil with high solubility is used, the wax that forms the liquid crystal is completely dissolved, so that liquid crystal is not formed. When a large amount of a hydrocarbon oil with little or no polarity is used, liquid crystal is well formed. However, when only a hydrocarbon oil is used, precipitation may occur beyond liquid crystal formation. In this regard, setting an oil system with an overall polarity and adding the quantitative extract of Centella asiatica, which is poorly soluble, can improve the structural stability of the liquid crystal.

[0043] In the present invention, the quantitative extract of Centella asiatica may be included in an amount of 0.01 to 1 wt%, 0.01 to 0.9 wt%, 0.01 to 0.8 wt%, 0.01 to 0.7 wt%, 0.01 to 0.6 wt%, 0.05 to 1 wt%, 0.05 to 0.9 wt%, 0.05 to 0.8 wt%, 0.05 to 0.7 wt%, 0.05 to 0.6 wt%, 0.1 to 1 wt%, 0.1 to 0.9 wt%, 0.1 to 0.8 wt%, 0.1 to 0.7 wt%, 0.1 to 0.6 wt%, for example, 0.5 wt%, based on the total weight of the composition.

[0044] In the present invention, the cosmetic composition having a lamellar liquid crystal structure may additionally contain oil, but is not limited thereto.

[0045] The above oil may be at least one selected from hydrocarbon oils, ester oils, vegetable oils, and aliphatic oils, and specifically, at least one selected from hydrocarbon oils and ester oils, and more specifically, at least one selected from the group consisting of caprylic / capric triglyceride, cetyl ethylhexanoate, ethylhexyl stearate, cetyl hexanoate, dicaprylyl carbonate, dicaprylyl ether, ethylhexyl palmitate, neopentyl glycol dicaprate, pentaerythrityl tetraethylhexanoate, pentaerythrityl tetra isostearate, coco-caprylate / caprate, octyldodecanol, olive oil, grape seed oil, macadamia oil, squalene, jojoba oil, castor oil, and sunflower seed oil, but is not necessarily limited thereto.

[0046] In the present invention, the oil may be included in an amount of 0.1 to 10 wt%, 0.1 to 8 wt%, 0.1 to 6 wt%, 0.1 to 4 wt%, 0.5 to 10 wt%, 0.5 to 8 wt%, 0.5 to 6 wt%, 0.5 to 4 wt%, 1 to 10 wt%, 1 to 8 wt%, 1 to 6 wt%, 1 to 4 wt%, 2 to 10 wt%, 2 to 8 wt%, 2 to 6 wt%, 2 to 4 wt%, for example, 3.3 wt%, based on the total weight of the composition.

[0047] The cosmetic composition having a lamellar liquid crystal structure according to the present invention may additionally include additives known in the technical field of the present invention. The additives include fragrances, preservatives, metal ion sequestrants, antioxidants, UV blockers, vitamins, and various extracts, and the additives may be used within a range that does not affect the stability of the composition.

[0048] Hereinafter, the present invention will be described in detail using examples to aid understanding. However, the examples according to the present invention may be modified in various ways, and the scope of the present invention should not be construed as being limited to the following examples. The examples of the present invention are provided to more fully explain the present invention to those of average skill in the art.

[0049] Throughout this specification, "%" used to indicate the concentration of a particular substance is (wt / wt)% for solid / solid, (wt / vol)% for solid / liquid, and (vol / vol)% for liquid / liquid, unless otherwise stated.

[0050]

[0051] <Examples and Comparative Examples>

[0052] Preparation of Examples and Comparative Examples

[0053] An emulsion cosmetic composition consisting of an aqueous phase and an oil phase was prepared according to the composition and contents presented in Table 1 below.

[0054] Specifically, after weighing the composition of the water phase, it was heated to 90°C and evenly dispersed for 10 minutes with an agi-mixer. Then, a thickener was added to the water phase and evenly dispersed for 5 minutes with an agi-mixer. The oil phase, which was evenly dissolved by heating to 85°C, was added to the water phase and emulsified for 5 minutes with a homo-mixer at 7,000 rpm. After emulsification, when the temperature of the emulsion solution was 40°C, the evaporated water (purified water) was compensated, and after adding a preservative, it was emulsified for 1 minute at 7,000 rpm to prepare a cosmetic composition.

[0055] Classification Composition / Content (% by weight) Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Water phase (purified water) To 100 To 100 To 100 To 100 To 100 To 100 Glycerin 20 10 10 10 25 20 Dipropylene glycol 10 20 15 20 5 10 TECA--0.10.5 0.10.1 Pentylene glycol 22 22 22 1,2-hexanediol 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.8 1.8 Stearyl olivate 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.8 1.8 1.8 1.8 1.2 ... Alcohol 0.80.80.80.80.80.8 Cetyl Alcohol 0.20.20.20.20.20.2 Caprylic / Capric Triglyceride 444444 Ethylhexyl Palmitate 333333 Ammonium Acryloyldimethyltaurate / VP Copolymer 0.30.30.30.30.30.3 Preservative Ethylhexylglycerin 0.050.050.050.050.050.05

[0056] <Experimental Example>

[0057] Experimental Example 1. Confirmation of Liquid Crystal Formation

[0058] The dispersion state and size of the emulsion droplets of the compositions of Examples (Examples 1, 3 and 4) and Comparative Examples (Comparative Examples 1 and 2) manufactured according to Manufacturing Example 1 above were compared through a 200x lens of an optical microscope (BX51, Olympus Co., Japan) and a polarizing microscope (U-POT, Olympus Co., Japan), and are shown in FIGS. 1 and 2 of the present invention.

[0059] As a result, it was confirmed that lamellar liquid crystals were formed in Examples 1, 3, and 4 (Fig. 1 A and B: Example 1, Fig. 1 C and D: Example 3, Fig. 1 E and F: Example 4).

[0060] On the other hand, in Comparative Examples 1 and 2, TECA was precipitated as it was without forming lamellar liquid crystals (Figs. 2 A and B: Comparative Example 1, Figs. 2 C and D: Comparative Example 2).

[0061] These results imply that the content of dipropylene glycol plays an important role not only in liquid crystal formation but also in dissolving TECA, and it was confirmed that when TECA cannot be dissolved, not only does liquid crystal formation not occur, but TECA is precipitated.

[0062] Experimental Example 2. Confirming the stability of the liquid crystal structure.

[0063] Each of the above compositions was observed after 3 months of storage at low temperature (4°C) after manufacturing. As a result, as can be confirmed in FIG. 3 of the present invention, when the TECA content is 0.5%, if the dipropylene glycol content is sufficient, TECA is well dissolved in the liquid crystal structure and stability is maintained (Example 4 of FIG. 3), but if the dipropylene glycol content is insufficient compared to glycerin, TECA is precipitated and the liquid crystal structure is not maintained, resulting in reduced stability (Comparative Example 2 of FIG. 3).

[0064] Experimental Example 3. Evaluation of moisturizing efficacy

[0065] In order to measure the immediate moisturizing effect of the skin, the compositions of Examples 2, 4 and Comparative Example 1 were applied to the skin and the skin moisture level was observed using Epsilon. Specifically, each composition of Examples 2, 4 and Comparative Example 1 was applied to the 1.5 cm wide and long area between the nasal bone and cheekbone of 5 subjects (2 males and 3 females) (average age 30.4 years). 2 The change in skin moisture level was measured over 8 hours by applying it to the area, and is shown in Figure 4.

[0066] As a result, when comparing the skin moisture content immediately after skin application, it was confirmed that in the case of Comparative Example 1, the skin moisture content increased by 170% immediately after skin application, whereas in Example 2, it increased by 193%, and in Example 4, it increased by 254%. In the case of moisturizing power, Example 2 showed an 18% improvement in the moisturizing power and Example 4 showed an 35% improvement in the moisturizing power compared to Comparative Example 1 after 8 hours of skin application, confirming that the cosmetic composition containing the high content polyol of the present invention has excellent moisturizing power, and in particular, in the case of Example 4, it was confirmed that TECA was stably dissolved in dipropylene glycol and showed excellent moisturizing efficacy.

[0067] Through the above results, it was confirmed that a cosmetic composition containing a high content of polyol not only immediately increases skin moisture level but also has excellent moisturizing effects that last for a certain period of time, and this can be further amplified with TECA.

[0068] Experimental Example 4. Evaluation of sedative efficacy

[0069] To measure the immediate soothing effect of the composition of the present invention on the skin, the redness (erythema value) of the skin was measured, and then the erythema composition was applied and the recovery rate after 10 minutes was compared. First, the initial redness of the skin of the test area was measured, and then the area was stripped 10 times with a stripping tape (D-squam tape) to apply artificial stimulation, and the redness immediately after was measured.

[0070] Specifically, each composition of Example 2, Example 4 and Comparative Example 1 was applied to the forearm of 5 subjects (1 male and 4 female, average age 28.6 years) measuring 1.5 cm in length and width. 2 The product was applied to the area, and the redness was remeasured after 10 minutes to evaluate the rate of redness recovery. The results are shown in Table 2 and Figure 5 below.

[0071] Comparative Example 1 Example 2 Example 4 Redness recovery rate (%) 21014.8

[0072] As a result of checking the redness recovery rate, when applied to the skin immediately after stimulation and measured 10 minutes later, Comparative Example 1 showed a recovery rate of 2%, whereas Examples 2 and 4 showed recovery rates of 10% and 14.8%, respectively (Table 2 and Fig. 5). These results show that the redness recovery rate improved by 8% for Example 2 and 12.8% for Example 4 compared to Comparative Example 1, confirming that the cosmetic composition containing a high content of polyol of the present invention has an excellent skin soothing effect.

[0073] In particular, in the case of the cosmetic composition containing both TECA and a high content of polyol in Example 4, it was confirmed that the soothing effect was the best, with redness calming down within a short period of time of 10 minutes.

[0074] The foregoing description of the present invention is provided for illustrative purposes only. Those skilled in the art will readily appreciate that the present invention can be readily modified into other specific forms without altering the technical spirit or essential characteristics of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

[0075] The purpose of the present invention is to provide a cosmetic composition having a lamellar liquid crystal structure that has excellent moisture retention capacity and improved moisture retention by using a high content of polyol.

Claims

1. A cosmetic composition having a lamellar liquid crystal structure comprising a polyol, a surfactant, a higher alcohol, and a thickener.

2. In paragraph 1, A cosmetic composition having a lamellar liquid crystal structure, wherein the polyol is at least one of C3 to C6.

3. In paragraph 2, A cosmetic composition having a lamellar liquid crystal structure, wherein the polyol is at least one selected from the group consisting of glycerin, propanediol, methylpropanediol, 2,3-butanediol, 1,2-hexanediol, butylene glycol, pentylene glycol, diglycerin, and dipropylene glycol.

4. In paragraph 1, A cosmetic composition having a lamellar liquid crystal structure, wherein the polyol is contained in an amount of 5 to 50 wt% based on the total weight of the composition.

5. In paragraph 1, A cosmetic composition having a lamellar liquid crystal structure, wherein the surfactant is at least one of an olivate series and an oleate series.

6. In paragraph 5, A cosmetic composition having a lamellar liquid crystal structure, wherein the surfactant is at least one selected from the group consisting of cetearyl olivate, stearyl olivate, sorbitan olivate, sorbitan oleate, sorbitan stearate, sorbitan isostearate, sorbitan laurate, sorbitan sesquioleate, and sorbitan caprylate.

7. In paragraph 1, A cosmetic composition having a lamellar liquid crystal structure, wherein the surfactant is contained in an amount of 0.1 to 10 wt% based on the total weight of the composition.

8. In paragraph 1, A cosmetic composition having a lamellar liquid crystal structure, wherein the higher alcohol is at least one selected from the group consisting of cetearyl alcohol, cetyl alcohol, stearyl alcohol, lauryl alcohol, behenyl alcohol, and myristyl alcohol.

9. In paragraph 1, A cosmetic composition having a lamellar liquid crystal structure, wherein the higher alcohol is contained in an amount of 0.1 to 10 wt% based on the total weight of the composition.

10. In paragraph 1, A cosmetic composition having a lamellar liquid crystal structure, wherein the thickening agent is at least one selected from the group consisting of xanthan gum, carrageenan, carbomer, hyaluronic acid, polyacrylate, acrylates / C10-30 alkyl acrylate crosspolymer, ammonium acryloyldimethyltaurate / VP copolymer, dextrin, bentonite, disteardimonium hectorite, dimethicone / vinyl dimethicone crosspolymer, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, sodium hyaluronate, sodium polyacryloyldimethyltaurate, and ammonium acryloyldimethyltaurate / VP copolymer.

11. In paragraph 1, A cosmetic composition having a lamellar liquid crystal structure, wherein the thickening agent is contained in an amount of 0.01 to 1 wt% based on the total weight of the composition.

12. In paragraph 1, A cosmetic composition having a lamellar liquid crystal structure, wherein the composition further comprises a titrated extract of centella asiatica (TECA).

13. In paragraph 12, A cosmetic composition having a lamellar liquid crystal structure, wherein the above Centella asiatica quantitative extract is contained in an amount of 0.01 to 1 wt% based on the total weight of the composition.

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