Cleansing cosmetic composition with excellent high-temperature stability

Abstract

The present invention relates to a cleansing cosmetic composition having excellent high-temperature stability, characterized by the inclusion of glyceryl hydroxystearate and a fatty acid, thereby maintaining a stable formulation with desirable fluidity without changes in viscosity or phase separation even under high-temperature conditions. Furthermore, the cleansing cosmetic composition according to the present invention has excellent foam retention, providing rich and soft foam upon use, and simultaneously achieves a fresh and smooth user experience with minimal skin tightness or dryness after cleansing.

Description

Technology Field

[0001] The present invention relates to a cleansing cosmetic composition having excellent formulation stability at high temperatures, and specifically, to a cleansing cosmetic composition that exhibits excellent formulation stability and foaming power by optimally combining glyceryl hydroxystearate and fatty acids. Background Technology

[0002] Recently, the cosmetics industry has seen an increasing demand from consumers who prioritize not only external skin appearance but also the sensory experience. Among these trends, foam-type cleansing cosmetic compositions capable of maximizing visual and tactile satisfaction are garnering attention; in particular, there is a growing demand for products that possess not only cleansing power but also formulation stability and a smooth texture.

[0003] Conventional cleansing cosmetic compositions include high concentrations of surfactants and thickeners to ensure foam volume and persistence; however, such compositions have problems such as phase separation or formulation instability in high-temperature environments, or reduced usability due to excessive viscosity.

[0004] Accordingly, the inventors conducted research to develop a cleansing cosmetic composition capable of maintaining a stable formulation even under high temperature conditions while simultaneously ensuring excellent foaming power and usability. As a result, by optimally combining glyceryl hydroxystearate and fatty acids, a new cleansing cosmetic composition was developed that improves the high-temperature stability of the formulation, foam retention, and physical usability. Prior art literature

[0005] Published Patent Application No. 10-2018-0124536 The problem to be solved

[0006] The present invention aims to provide a cleansing cosmetic composition that can maintain a stable formulation without phase separation, liquefaction, or crystal phase precipitation occurring even at high temperatures, and simultaneously provides excellent foam retention and a soft feel.

[0007] The technical problems of the present invention are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0008] According to an embodiment of the present invention, a cosmetic composition for cleansing is provided, comprising glyceryl hydroxystearate and a fatty acid.

[0009] In addition, glyceryl hydroxystearate may be included in an amount of 0.6 to 3.9 weight% based on the total weight of the cleansing cosmetic composition.

[0010] In addition, the fatty acid may include one or more selected from the group consisting of myristic acid, palmitic acid, stearic acid, lauric acid, caprylic acid, oleic acid, linoleic acid, hydroxystearic acid, isostearic acid, and coconut acid.

[0011] In addition, fatty acids may be included in an amount of 21 to 39 weight percent based on the total weight of the cleansing cosmetic composition.

[0012] In addition, the cleansing cosmetic composition may further include a surfactant.

[0013] In addition, the surfactant may be included in an amount of 5 to 20 weight percent based on the total weight of the cleansing cosmetic composition.

[0014] In addition, the cleansing cosmetic composition may be characterized as being in the form of a water-dispersible cream.

[0015] In addition, the cleansing cosmetic composition may be characterized by forming foam. Effects of the invention

[0016] The cleansing cosmetic composition according to the present invention is characterized by forming a stable formulation with appropriate fluidity without phase separation or crystal phase precipitation occurring even at high temperatures through a combination of glyceryl hydroxystearate and fatty acids, and simultaneously securing appearance completeness and storage stability by maintaining a homogeneous internal structure of the formulation.

[0017] Furthermore, the cleansing cosmetic composition according to the present invention exhibits excellent foam density and retention, forming soft and rich foam during cleansing, and provides a fresh and comfortable user experience with minimal skin tightness or dryness even after cleansing. In particular, the physical stability of the formulation is maintained even during long-term storage or temperature changes, thereby enhancing product quality reliability and enabling the simultaneous realization of functional stability and sensory satisfaction. Brief explanation of the drawing

[0018] A brief description of each drawing is provided to help to better understand the drawings cited in the detailed description of the invention. Figure 1 is a figure showing the results of confirming the stability of the formulation at high temperatures depending on whether glyceryl hydroxystearate is included. Figure 2 is a figure showing the results of confirming foaming power according to whether glyceryl hydroxystearate is included. Figure 3 is a figure showing the results of confirming whether crystalline phase precipitation occurs depending on whether glyceryl hydroxystearate is included. Specific details for implementing the invention

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by a skilled expert in the art to which the present invention pertains. In general, the nomenclature used herein is well known and commonly used in the art. Furthermore, in describing embodiments of the present invention, detailed descriptions of related known components or functions are omitted if it is determined that such detailed descriptions would hinder understanding of the embodiments of the present invention. Additionally, while embodiments of the present invention will be described below, the technical concept of the present invention is not limited or restricted thereto and can be modified and implemented in various ways by those skilled in the art.

[0020] In this specification, when a part is described as including a certain component, it means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. In this specification, the term "and / or" includes a combination of a plurality of related items or any one of a plurality of related items.

[0022] According to an embodiment of the present invention, a cosmetic composition for cleansing comprising glyceryl hydroxystearate and a fatty acid is provided.

[0023] The cleansing cosmetic composition according to an embodiment of the present invention contains glyceryl hydroxystearate and fatty acids, thereby maintaining a stable formulation even at high temperatures and possessing excellent formulation stability in which phase separation or crystal phase precipitation does not occur. Furthermore, by appropriately combining the above ingredients, the structural stability of the formulation is improved, and at the same time, the skin feels less tight or dry after cleansing, providing a soft and refreshing sensation. In addition, it can form a dense foam with excellent retention.

[0024] The above-mentioned glyceryl hydroxystearate is a component obtained by the esterification reaction of glycerin and hydroxystearic acid, and plays a role in stabilizing the interfacial structure of the formulation through interactions with fatty acids and other components. Glyceryl hydroxystearate contributes to the physical stability of the formulation by maintaining a uniform dispersion state of the aqueous and oil phase components, and by controlling the fluidity of the formulation, it suppresses phenomena such as excessive thinness or uneven viscosity. In addition, during the foam formation process, it maintains a dense and soft foam structure through combination with other components, thereby alleviating skin tightness or dryness after cleansing and providing a refreshing sensation. Therefore, as a component that helps with formulation stability, fluidity control, and sensory enhancement, glyceryl hydroxystearate contributes to improving the physical completeness of the cleansing cosmetic composition.

[0025] In one embodiment, the glyceryl hydroxystearate may be included in an amount of 0.6 to 3.9 weight% based on the total weight of the cleansing cosmetic composition, specifically in an amount of 1 to 2 weight%. If the content of glyceryl hydroxystearate is less than 0.6 weight%, the fluidity of the formulation may become excessively high, and formulation stability may be reduced, such as by the occurrence of phase separation at high temperatures. On the other hand, if it is included in an amount exceeding 3.9 weight%, the viscosity of the formulation may increase excessively, a stiff or residue may be felt on the skin upon use, and foam retention may also decrease. However, it is not limited thereto.

[0026] The above fatty acid is an organic compound having a carboxyl group (-COOH) at one end of a hydrocarbon chain, generally referring to an aliphatic monoacid derived from natural oils or fats. The physical properties of fatty acids vary depending on the number of carbon atoms and saturation, which affect the melting point, viscosity, fluidity, and crystallization tendency at room temperature. When fatty acids are included in a cosmetic composition for cleansing, they contribute to the formation of stable interfaces and the maintenance of structural homogeneity within the formulation, and can improve the stability of the formulation through interactions with other ingredients. Furthermore, by controlling the viscosity and fluidity of the formulation, physical changes can be minimized, and the elasticity and density of the foam during cleansing can be increased, providing a rich and gentle cleansing sensation.

[0027] In one embodiment, the fatty acid may include one or more selected from the group consisting of myristic acid, palmitic acid, stearic acid, lauric acid, caprylic acid, oleic acid, linoleic acid, hydroxystearic acid, isostearic acid, and coconut acid; specifically, it may include one or more selected from the group consisting of myristic acid, palmitic acid, stearic acid, and lauric acid; more specifically, it may include myristic acid, palmitic acid, stearic acid, and lauric acid; and even more specifically, myristic acid, palmitic acid, Stearic acid and lauric acid may be included in a weight ratio of 1:0.01 to 1:0.01 to 1:0.01 to 1. However, it is not limited thereto.

[0028] In one embodiment, the fatty acid may be included in an amount of 21 to 39 weight% based on the total weight of the cleansing cosmetic composition, specifically in an amount of 31 to 37 weight%. If the fatty acid is included in an amount less than 21 weight%, the oil phase structure within the formulation becomes unstable, which may cause phase separation or liquefaction, and may reduce foaming ability and cleansing power. On the other hand, if it is included in an amount exceeding 39 weight%, the viscosity of the formulation increases excessively, leading to increased hardness and a problem of a residue feeling on the skin upon use. However, it is not limited thereto.

[0029] The cleansing cosmetic composition according to an embodiment of the present invention may additionally include additives.

[0030] The above additive is a component that may be included to complement the physical and sensory characteristics of a cleansing cosmetic composition or to enhance functional performance, and can perform various roles such as viscosity control, moisturization, acidity control, oxidation prevention, and improvement of usability. To implement these functions, the cleansing cosmetic composition may include an appropriate type of additive as needed, and the type may be selected without limitation depending on the purpose of the composition and the required functions.

[0031] In one embodiment, the additive may include potassium hydroxide. However, it is not limited thereto.

[0032] The cleansing cosmetic composition according to an embodiment of the present invention may further include a surfactant.

[0033] The above surfactant is a component having an amphiphilic structure that simultaneously possesses hydrophilic and hydrophobic groups within its molecule, and it serves to help the components disperse uniformly by reducing interfacial tension between substances of different polarities. A cleansing cosmetic composition may include a surfactant to provide foam-forming and cleansing functions, thereby contributing to the formation of soft, rich foam during cleansing and the effective removal of contaminants.

[0034] In one embodiment, the surfactant may include one or more selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants, and amino acid-based surfactants, and specifically, potassium cocoyl glycinate, decyl glucoside, sodium lauroyl glutamate, sodium cocoyl isethionate, sodium methyl cocoyl taurate, sodium lauroyl sarcosinate, and cocamidopropyl betaine. It may include one or more selected from the group consisting of lauryl hydroxysultaine, decyl glucoside, and sorbitan oleate. However, it is not limited thereto.

[0035] In one embodiment, the surfactant may be included in an amount of 5 to 20 weight% based on the total weight of the cleansing cosmetic composition, specifically in an amount of 8 to 12 weight%. When the surfactant is included within the above weight range, the dispersion stability of the oil phase component in the formulation is improved, allowing the interfacial structure to be maintained uniformly, and formulation collapse or phase separation phenomena can be effectively suppressed even under high temperature conditions. In addition, the size and distribution of bubbles are maintained consistently during the foam formation process, resulting in the formation of denser and more elastic foam, and providing a soft and uniform feel during cleansing. However, it is not limited thereto.

[0036] In addition to the above ingredients, the cleansing cosmetic composition according to the present invention may additionally include ingredients found in general cosmetic compositions, such as preservatives, functional ingredients, chelating agents, disinfectants, pH adjusters, antioxidants, alcohols, plant extracts, fragrances, cooling agents, thickening agents, additives, etc. The above preservative is used to enhance the effect of preservation and may include 1,2-hexanediol, etc. The chelating agent is used to stabilize metal ions within the formulation to prevent discoloration or oxidation reactions and may include sodium phytate, etc. The thickening agent is used to increase the viscosity of the cosmetic and may include at least one of carbomer, xanthan gum, and sodium polyacrylate, but is not limited thereto.

[0037] The amount of the above ingredients is not particularly limited and can be easily selected by a person skilled in the art within a range that does not impair the purpose and effect of the present invention.

[0039] A cleansing cosmetic composition according to an embodiment of the present invention may be a cleansing cosmetic composition characterized by being in the form of a water-dispersible cream.

[0040] The above-mentioned water-dispersed cream formulation is a formulation in which the aqueous phase, which serves as the basis of the formulation, is finely dispersed together with the oil phase to form a semi-solid state similar to a cream, and the aqueous phase is evenly spread throughout the entire formulation to exhibit a soft and dense texture. This structure provides a light and refreshing spreadability when the formulation is applied, and as the uniform distribution of the aqueous phase is maintained, it exhibits excellent thermal stability and viscosity retention, and the fluidity and physical stability of the formulation can be improved.

[0041] A cleansing cosmetic composition according to an embodiment of the present invention may be a cleansing cosmetic composition characterized by forming foam.

[0042] According to the embodiments, the cleansing cosmetic composition of the present invention can be manufactured into various forms of products that have excellent formulation stability, foam retention, fluidity, and post-cleansing feel, and low skin irritation. For example, it can be implemented as various cleansing products such as cream cleansers, foam cleansers, gel-to-foam cleansers, facial foams, cleansing mousses, cleansing creams, cleansing soothing foams, and mildly acidic bubble cleansers, and can provide a fresh and moisturizing cleansing sensation along with a stable formulation when used.

[0044] In the following, examples and comparative examples are presented to further explain the present invention in more detail, but the present invention is not limited thereto.

[0046] Experimental Example 1. Comparative experiment based on the presence or absence of glyceryl hydroxystearate

[0047] (1) Preparation of Examples and Comparative Examples

[0048] In order to examine the effect of whether glyceryl hydroxystearate is included on the formulation stability, foaming power, and hardness of the cleansing cosmetic composition according to the present invention at high temperatures, examples and comparative examples were prepared with different inclusions of glyceryl hydroxystearate, as described in Tables 1 and 2 below.

[0049]

[0051]

[0053] The unit of the component content in Tables 1 and 2 is weight%, and the specific manufacturing method is as follows.

[0054] First, mixed fatty acids were prepared by mixing lauric acid, myristic acid, palmitic acid, and stearic acid in a weight ratio of 3:25:4:3. Although the mixed fatty acids of the above combination were used in this experiment, mixed fatty acids can be prepared in various ways by varying the combination and weight ratio of fatty acids depending on the purpose.

[0055] Subsequently, each component was mixed and heated to 80°C, stirring and mixing were performed at the above temperature, and the mixture after stirring and mixing was cooled to room temperature to prepare the cosmetic compositions of the examples and comparative examples.

[0057] (2) Confirmation of formulation stability at high temperatures

[0058] The compositions of the examples and comparative examples were placed in a transparent container and heated to 50°C, and the formulation stability at high temperatures was confirmed by observing the fluidity of each composition and whether phase separation occurred.

[0059] In the case of confirming fluidity, A was used to indicate the case where there was no fluidity and the cream-like formulation was maintained, B was used to indicate the case where some fluidity was observed but the cream-like formulation was maintained, and C was used to indicate the case where the composition liquefied and fluidity increased significantly.

[0060] For the confirmation of the degree of phase separation, cases where no phase separation was observed were classified as A, cases where it was observed only in some areas as B, and cases where it was observed throughout the composition as C; the results are listed in Table 3 below. The results of confirming the formulation stability of each composition at high temperatures are shown in Figure 1 below.

[0061]

[0063] As confirmed in Table 3 above and Figure 1 below, in the case of Examples 1 to 3 containing glyceryl hydroxystearate, it was found that no phase separation occurred at high temperatures and a cream-like formulation with low fluidity was exhibited.

[0064] On the other hand, in the case of Comparative Examples 1 to 4, which do not contain glyceryl hydroxystearate, a cream-like formulation with low fluidity like the example was not achieved, and a liquid-like formulation that flows quickly like water was exhibited, and phase separation at high temperatures was observed throughout the composition.

[0066] (3) Check foaming power

[0067] The foaming power of the compositions of the examples and comparative examples was evaluated using a foam scanner. Specifically, 30 mL of a 1% solution was injected into a measuring tube, and bubbles were injected from the bottom of the tube for 10 seconds. After stopping the bubble injection, changes in the bubbles were measured for 600 seconds using a camera built into the equipment to calculate the initial number of bubbles, the final number of bubbles, and the average bubble radius, thereby evaluating the foam retention power. The measurement results are shown in Table 4 below, and the results of verifying the foaming power of each composition are shown in Figure 2.

[0068]

[0070] As confirmed in Table 4 above and Figure 2 below, in the case of Examples 1 to 3 containing glyceryl hydroxystearate, the average foam radius was measured to be 100 μm or more, and the foam retention power was also excellent at 50% or more, and it was confirmed that relatively dense and uniform foam was formed.

[0071] On the other hand, in the case of Comparative Example 1, which does not contain glyceryl stearate, foaming power could be confirmed through a limitedly formed formulation, but the average foam radius was measured to be lower than that of the example at 70 μm or less, and it was confirmed that the foam retention power was reduced to about 40% compared to the example.

[0072] In addition, in the case of Comparative Examples 2 to 4, which do not contain glyceryl stearate and contain alternative ingredients, foaming power was not measured as a suitable formulation was not formed.

[0074] (4) Check hardness

[0075] The compositions of the examples and comparative examples were filled into cylinders for automatic texture analyzers, the top surface was flattened, and then stored for 2 months and 3 months at 25°C, 37°C, and 50°C, respectively. After storage, the samples were reduced at room temperature for 24 hours, and then the hardness was measured using an automatic texture analyzer. The measurement conditions were set to a Ø 20 mm flat probe, a load of 0.2 kg, a penetration distance of 15 mm, and a test speed of 30 cm / min, and the hardness value was defined as the peak force (gf) during the penetration process. Measurements were repeated three times under each condition to calculate the average value, and the hardness measurement results for each composition are shown in Tables 5 and 6 below.

[0076] It is known that for a composition exhibiting a suitable water-dispersible cream formulation, physical stability can be ensured and a soft feel can be achieved when exhibiting a hardness value of about 150 to 300 gf at room temperature, about 400 to 750 gf in the body temperature range, and about 900 to 1300 gf under high temperature conditions of 50°C or higher.

[0077]

[0079]

[0081] As confirmed in Tables 5 and 6 above, in the case of Examples 1 to 3 containing hydroxyglyceryl stearate, compared to Comparative Examples 1 to 4 not containing hydroxyglyceryl stearate, when hardness was measured after storage for 2 and 3 months, it was confirmed that they exhibited appropriate hardness range values ​​under each temperature condition, indicating that they correspond to compositions of a desirable formulation.

[0082] On the other hand, in the case of Comparative Example 1, which does not contain hydroxyglyceryl stearate, the hardness was measured to be approximately 1000gf when stored at 37℃ for 3 months, and it was confirmed that it could not form an appropriate formulation as the hardness was measured to be excessively high when stored at a high temperature of 50℃ for 2 months and 3 months.

[0083] In addition, in the case of Comparative Example 2, which contains glyceryl stearate as a substitute for hydroxyglyceryl stearate, it was found that the hardness measurements when stored at 37°C for 3 months, and at 50°C for 2 and 3 months, deviated from the appropriate hardness range, indicating a decrease in formulation suitability.

[0084] In addition, in the case of Comparative Example 3, which includes sorbitan oliveate as a substitute for hydroxyglyceryl stearate, it exhibited a hardness value similar to that of the example under storage conditions of 25°C, but when stored at 37°C for 2 months, the hardness value increased slightly compared to the example, and when stored at 37°C for 3 months, the hardness value was measured at 1712gf, indicating that physical stability was not secured under those conditions. Furthermore, when stored at 50°C for 2 and 3 months, the hardness measurements were measured to be very high at approximately 2000gf, confirming that the high-temperature stability of the formulation was lower than that of the example.

[0085] Meanwhile, in the case of Comparative Example 4, where glycol distearate was used as a substitute ingredient, the hardness value did not show a significant difference compared to the example under storage conditions of 25°C and 37°C, but the hardness measurement value when stored for 2 and 3 months at a high temperature of 50°C was measured to be very high at approximately 2000 gf, indicating that a desirable water-dispersible cream formulation was not achieved.

[0087] (5) Check for crystalline precipitation in the formulation

[0088] The compositions of Example 1 and Comparative Example 1 were stored at 50°C for 2 months, then reduced at room temperature for 24 hours, and the presence of a crystalline phase precipitated within the formulation was visually checked. The results of the check for the presence of a crystalline phase precipitated within the formulation of each composition are shown in Figure 3 below.

[0089] As confirmed in Figure 3 below, in the case of Example 1 containing glyceryl hydroxystearate as an emulsifier, no crystalline phase was precipitated in the formulation, whereas in the case of Comparative Example 1 not containing glyceryl hydroxystearate, a crystalline phase was precipitated in the formulation, and it was confirmed that it was not suitable for use.

[0091] (6) Experimental results

[0092] Based on the experimental results described above, it was confirmed that including glyceryl hydroxystearate in a cleansing cosmetic composition is desirable for improving the formulation suitability of the cleansing cosmetic composition, including formulation stability at high temperatures, foaming power, and hardness.

[0094] Experimental Example 2. Comparative experiment according to glyceryl hydroxystearate content

[0095] (1) Preparation of comparative example

[0096] In order to examine the effect of the content of glyceryl hydroxystearate on the formulation stability, foaming power, and hardness of the cleansing cosmetic composition according to the present invention at high temperatures, comparative examples were prepared with different amounts of glyceryl hydroxystearate as described in Table 7 below. Mixed fatty acids were used as in the examples. The unit of the component content in Table 7 is weight%, and the preparation method is the same as in Experimental Example 1.

[0097]

[0099] (2) Confirmation of formulation stability at high temperatures

[0100] The formulation stability of each composition at high temperatures was confirmed using the same method as in Experimental Example 1 above, and the results of confirming the formulation stability of each composition at high temperatures are indicated in Table 8 below in the same form as in Experimental Example 1.

[0101]

[0103] As confirmed in Table 8 above, in the case of Comparative Example 6, which contains an excess amount of glyceryl hydroxystearate compared to the example, no formulation stability issues at high temperatures were observed; however, in the case of Comparative Example 5, which contains a small amount of glyceryl hydroxystearate compared to the example, a suitable formulation with low fluidity was not achieved, and a liquid formulation that flows quickly like water was exhibited, and phase separation was observed at high temperatures.

[0105] (3) Check foaming power

[0106] The foaming power of each composition was verified using the same method as in Experimental Example 1 above, and the results of verifying the foaming power of each composition were indicated in Table 9 below in the same form as in Experimental Example 1.

[0107]

[0109] As confirmed in Table 9 above, in the case of Comparative Example 5, which contains a small amount of glyceryl hydroxystearate compared to the example, a suitable formulation was not formed, so foaming power measurement was not performed.

[0110] In addition, in the case of Comparative Example 6, which contains an excess amount of glyceryl stearate compared to the example, the number of initial and final bubbles was lower than that of the example, and the foam retention power was also measured to be around 40%, so it was confirmed that the foaming power was reduced compared to the example.

[0112] (4) Check hardness

[0113] The hardness of each composition was determined using the same method as in Experimental Example 1 above. The results of the hardness determination of each composition were indicated in Tables 10 and 11 below in the same format as in Experimental Example 1.

[0114]

[0116]

[0118] As confirmed in Tables 10 and 11 above, in the case of Comparative Example 5, which contains a small amount of hydroxyglyceryl stearate compared to the example, appropriate hardness values ​​were observed at 25°C and 37°C, but it was found that the hardness became excessively high at high temperatures and was not suitable for use.

[0119] In addition, in the case of Comparative Example 6, which contains an excess amount of hydroxyglyceryl stearate compared to the example, the hardness value under all storage conditions was measured to be higher than that of the example, resulting in a problem where the cream-like formulation characteristics were not maintained at all and it hardened to a solid state. Consequently, it was confirmed that it was virtually impossible to use in practice because the basic physical properties as a formulation could not be secured.

[0121] (5) Experimental results

[0122] Based on the experimental results described above, it was confirmed that including glyceryl hydroxystearate in an appropriate amount in a cleansing cosmetic composition is desirable for improving the formulation suitability of the cleansing cosmetic composition, including formulation stability at high temperatures, foaming power, and hardness.

[0124] Experimental Example 3. Comparative experiment according to fatty acid content

[0125] (1) Preparation of comparative example

[0126] In order to examine the effect of fatty acid content on the formulation stability, foaming power, and hardness of the cleansing cosmetic composition according to the present invention at high temperatures, comparative examples were prepared with different fatty acid content as described in Table 12 below. Mixed fatty acids were used in the same way as in the examples. The unit of the component content in Table 12 is weight%, and the manufacturing method is the same as in Experimental Example 1.

[0127]

[0129] (2) Confirmation of formulation stability at high temperatures

[0130] The formulation stability of each composition at high temperatures was confirmed using the same method as in Experimental Example 1 above, and the results of confirming the formulation stability of each composition at high temperatures are indicated in Table 13 below in the same form as in Experimental Example 1.

[0131]

[0133] As confirmed in Table 13 above, in the case of Comparative Example 7, which contains a small amount of fatty acid compared to the example, no phase separation phenomenon was observed, but a cream-like formulation with low fluidity like the example was not realized, and a liquid formulation that flows quickly like water was exhibited.

[0134] In addition, in the case of Comparative Example 8, which contains an excess amount of fatty acids compared to the example, it was confirmed that the fluidity of the formulation was very high as a liquid formulation was exhibited instead of a suitable cream formulation, and some phase separation was observed.

[0136] (3) Check foaming power

[0137] The foaming power of each composition was verified using the same method as in Experimental Example 1 above, and the results of verifying the foaming power of each composition are shown in Table 14 below in the same form as in Experimental Example 1.

[0138]

[0140] As can be seen in Table 14 above, in the case of Comparative Example 7, which contains a small amount of fatty acid compared to the example, and Comparative Example 8, which contains an excessive amount of fatty acid compared to the example, the foaming power was not measured as a suitable formulation was not achieved.

[0142] (4) Check hardness

[0143] The hardness of each composition was determined using the same method as in Experimental Example 1 above, and the results of the hardness determination of each composition were indicated in Tables 15 and 16 below in the same format as in Experimental Example 1.

[0144]

[0146]

[0148] As can be seen in Tables 15 and 16 above, in the case of Comparative Example 7, which contains a small amount of fatty acid compared to the example, and Comparative Example 8, which contains an excessive amount of fatty acid compared to the example, the hardness of the formulation was outside the measurable range, making it impossible to measure the hardness value.

[0150] (5) Experimental results

[0151] Based on a comprehensive review of the experimental results described above, it was confirmed that including fatty acids in an appropriate amount in a cleansing cosmetic composition is desirable for improving the formulation suitability of the cleansing cosmetic composition, including formulation stability at high temperatures, foaming power, and hardness.

[0153] Foregoing, specific parts of the content of the present invention have been described in detail. It will be apparent to those skilled in the art that such specific descriptions are merely preferred embodiments and do not limit the scope of the present invention. Accordingly, the actual scope of the present invention is defined by the appended claims and their equivalents.

Claims

Claim 1 A cleansing cosmetic composition comprising glyceryl hydroxystearate and fatty acid, wherein the glyceryl hydroxystearate is included in an amount of 0.6 to 3.9 weight% based on the total weight of the cleansing cosmetic composition, and the fatty acid is included in an amount of 21 to 39 weight% based on the total weight of the cleansing cosmetic composition. Claim 2 delete Claim 3 A cosmetic composition for cleansing according to claim 1, wherein the fatty acid comprises one or more selected from the group consisting of myristic acid, palmitic acid, stearic acid, lauric acid, caprylic acid, oleic acid, linoleic acid, hydroxystearic acid, isostearic acid, and coconut acid. Claim 4 delete Claim 5 In claim 1, the cleansing cosmetic composition further comprises a surfactant. Claim 6 A cleansing cosmetic composition according to claim 5, wherein the surfactant is included in an amount of 5 to 20 weight% based on the total weight of the cleansing cosmetic composition. Claim 7 A cleansing cosmetic composition according to claim 1, characterized in that the cleansing cosmetic composition is in the form of a water-dispersible cream. Claim 8 A cleansing cosmetic composition according to claim 1, characterized in that the cleansing cosmetic composition forms foam.

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