Cosmetic composition containing amphiphilic polymer

Abstract

The present invention provides a cosmetic composition including an amphiphilic polyurethane-based polymer. The amphiphilic polyurethane-based polymer has an appropriate affinity with both the skin and the cosmetic film, and therefore can reduce the surface energy gap between the skin and the cosmetic film, thereby increasing the affinity of the makeup and helping the cosmetic film to be formed better on the skin. This can improve the phenomenon of makeup crumbling, lifting, and aggregation, and can form a thinner and more uniform cosmetic film. Such an improvement effect can result in an improvement in the final skin texture, and can provide the effect of good makeup application that can be felt by consumers.

Description

[Technical field]

[0001] The present invention relates to a cosmetic composition containing an amphiphilic polymer. [Background technology]

[0002] Cosmetics are known to have various skin-improving effects such as moisturizing, whitening, and improving wrinkles and elasticity of the skin. Recently, cosmetics have been developed that aim to improve the penetration of active ingredients into the skin and strengthen the skin barrier. However, the most basic and important purpose of cosmetics is to make the appearance more beautiful. Various research results have shown that the extent to which makeup improves the appearance is greatly influenced by makeup lump, makeup collapse, and makeup uplift. In the field of cosmetics, technologies to improve skin texture and increase the adhesion between the skin and makeup are being continuously developed to improve these points.

[0003] The force that brings two objects into contact is called adhesion. In order to control this force, it is important to understand the interactions between molecules. The more similar the surface energies of two solid surfaces are, the higher the affinity between the objects will be, and the better their adhesion to each other will be. Van der Waals interactions affect surface energy, but to a lesser extent than covalent or hydrogen bonds. Therefore, when there are functional groups capable of covalent or hydrogen bonding, their effect on increasing surface energy is much greater than that of van der Waals. The surface energy of skin is approximately 30-40 mJ / m 2 Generally, the surface energy of the foundation cosmetic film is about 15 mJ / m of the surface energy of the skin. 2 Therefore, by adjusting the difference in surface energy between the skin and the cosmetic film, the affinity between the two can be adjusted.

[0004] There are several methods for analyzing the condition of a cosmetic film, such as a spreadability analysis using a dynamic friction coefficient analysis, and a burial and durability analysis using artificial sebum. However, most of these methods evaluate the lump, lifting, or crumbling of makeup with the naked eye, which means that the analysis of the cosmetic film is not objective or quantitative.

[0005] In the present invention, an amphiphilic substance capable of adjusting the difference in surface energy between the skin and the cosmetic film at the interface between the skin and the cosmetic film is selected to enhance affinity. The object of the present invention is to improve the affinity between the skin and the cosmetic film to solve the problems of makeup lumping, lifting and collapse, and to increase consumer satisfaction with makeup. A new cosmetic film analysis method is proposed using parameters related to three types of phenomena that are more suitable than the existing naked eye analysis method. First, the overall texture of the cosmetic film is analyzed through 3D non-contact Atomic Force Microscope (AFM) analysis. The agglomeration phenomenon is confirmed through cross-sectional analysis of the cosmetic film. In addition, the collapse phenomenon is analyzed through a cosmetic film destruction experiment that mimics muscle movement using a texture analyzer.

[0006] The three proposed methods allow for objective analysis of cosmetic films through physicochemical parameters related to actual phenomena, and are expected to be useful for objective research into consumer-perceived efficacy and usability. Summary of the Invention [Problem to be solved by the invention]

[0007] Make-up lump, lifting and crumbling are three factors that determine how well makeup is applied. The present invention aims to reduce the above three factors by improving the affinity between the skin and the cosmetic film using an amphiphilic substance. [Means for solving the problem]

[0008] The present invention provides a cosmetic composition that increases the skin adhesion of a makeup cosmetic containing an amphiphilic polyurethane-based polymer.

[0009] The present invention also provides a cosmetic composition for increasing the skin adhesion of the above-mentioned makeup cosmetic, comprising the steps of: applying the cosmetic composition to skin; and Provided is a method for applying a cosmetic composition that increases the skin adhesion of a makeup cosmetic, the method comprising the step of applying the makeup cosmetic to form a cosmetic film.

[0010] The present invention also provides a use of a composition containing an amphiphilic polyurethane-based polymer for producing a cosmetic composition that increases the skin adhesion of a makeup cosmetic. Effect of the Invention

[0011] The present invention provides a cosmetic composition containing an amphiphilic polyurethane-based polymer.

[0012] The amphiphilic polyurethane polymer has an appropriate affinity with both the skin and the cosmetic film, and therefore can reduce the surface energy gap between the skin and the cosmetic film, thereby increasing the affinity of the makeup and helping the cosmetic film to be formed better on the skin. This can improve the makeup crumbling, lifting and aggregation phenomena, and form a thinner and more uniform cosmetic film. This improvement effect ultimately leads to an improvement in skin texture, and can provide the effect of good makeup application that can be felt by consumers. [Brief description of the drawings]

[0013] [Figure 1]Figure 1 shows a SEM image (a), a C element EDS image (b), and a Ti element EDS image (c) of the cross section of the essence to which the technology has not been applied, as well as a SEM image (d), a C element EDS image (e), and a Ti element EDS image (f) of the cross section of the essence to which the technology has been applied. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The present invention relates to a cosmetic composition that increases the skin adhesion of a makeup cosmetic containing an amphiphilic polyurethane-based polymer.

[0015] The configuration of the present invention will be specifically described below.

[0016] The term "comprising" a part means that it may further comprise other elements, but not to the exclusion of other elements, unless expressly stated to the contrary.

[0017] The cosmetic composition for increasing the skin adhesion of the makeup cosmetic of the present invention may contain an amphiphilic polyurethane-based polymer.

[0018] In O / W formulations, which are basic products, hydrophilic polymers are used as thickeners and / or film-forming agents, while in W / S formulations, which are color-toned products, silicone or acrylic lipophilic polymers are used as film-forming agents. In this case, it is advantageous in terms of formulation stability, adhesion to the skin, and affinity with color-toned formulations, but hydrophilic polymers have low affinity with color-toned cosmetic films, and lipophilic polymers have low affinity with the skin, so there is a risk of makeup floating / breaking / clumping.

[0019] In the present invention, the amphiphilic polyurethane-based polymer has an appropriate affinity with both the skin and the cosmetic film. This reduces the surface energy gap between the skin and the cosmetic film, thereby increasing the affinity of the makeup cosmetic, which reduces the cohesion of the makeup cosmetic and helps to form a better cosmetic film on the skin. Therefore, by using the amphiphilic polyurethane-based polymer, it is possible to improve the phenomenon of makeup crumbling, lifting, and cohesion, and to form a thinner and more uniform cosmetic film. This improvement effect ultimately leads to improvement in skin texture, and can provide the effect of good makeup adhesion that can be felt by consumers.

[0020] In one embodiment, the amphiphilic polyurethane-based polymer may be one or more of PEG-240 / HDI Copolymer Bis-Decyltetradeceth-20 Ether and Polyurethane-15. For example, a commercially available product containing the PEG-240 / Decyltetradeceth-20 / HDI Copolymer and / or Polyurethane-15 may be used.

[0021] In one embodiment, the content of the amphiphilic polyurethane polymer is not particularly limited, and may be 0.0001 to 5 wt %, 0.001 to 2 wt %, 0.01 to 1 wt %, or 0.05 to 0.5 wt % based on the total composition.

[0022] In one embodiment, the cosmetic composition for increasing the adhesion of makeup cosmetics may be applied to an O / W formulation or a W / S formulation.

[0023] The cosmetic composition for increasing the skin adhesion of the makeup cosmetic according to the present invention may further include one or more active principles, which may be one or more selected from the group consisting of natural extracts, oils, moisturizers, whitening agents, wrinkle improving agents, acne alleviating agents, atopy alleviating agents, UV protection agents, hair growth agents, vitamins and their derivatives, amino acids or polypeptides, anti-inflammatory agents, female hormone agents, keratin exfoliating and dissolving agents, bactericides, placenta, allantoin, yeast extracts, collagen, elastin, DHA, EPA, ceramides, fragrances, and mixtures thereof.

[0024] The cosmetic composition for increasing the skin adhesion of the makeup cosmetic of the present invention may be used before makeup. That is, the cosmetic composition for increasing the skin adhesion of the makeup cosmetic of the present invention may mean a cosmetic composition used in a step before makeup.

[0025] The cosmetic composition according to the present invention can improve the adhesion of makeup cosmetics and prevent makeup from floating, coming off, or sagging.

[0026] The cosmetic composition of the present invention may be applied to one or more selected from the group consisting of basic cosmetics, sun products, and makeup base products.

[0027] In one embodiment, the cosmetic composition according to the present invention is applied to a skincare product, and the skincare product is then applied to the skin. In this case, the skincare product may be an emulsion, essence, cream, etc.

[0028] In one embodiment, the cosmetic composition according to the present invention is applied to a sunscreen product, and a makeup cosmetic can be applied after the sunscreen product is applied to the skin. In this case, the sunscreen product may be a sun cream, a sun lotion, a sun milk, a sun stick, etc.

[0029] In one embodiment, the cosmetic composition according to the present invention may be applied to a makeup base product, and the makeup cosmetic may be applied after applying the makeup base product to the skin. In this case, the makeup base product may be a makeup base, a primer, etc.

[0030] In the present invention, the makeup cosmetics or color cosmetics can be broadly divided into base makeup cosmetics used on the skin and point makeup cosmetics used on the eyes, eyebrows, lips, etc. The base makeup cosmetics are foundations, cheeks, etc., and can create a natural skin tone over the entire face and create a three-dimensional look and transparency, while the point makeup cosmetics are eye shadows, mascaras, false eyelashes, eyeliners, lipsticks, etc., and can emphasize the impression.

[0031] The present invention also relates to a method for applying a cosmetic composition that increases the skin adhesion of a makeup cosmetic, comprising the steps of: applying the cosmetic composition that increases the skin adhesion of the makeup cosmetic to skin; and applying the makeup cosmetic to form a cosmetic film.

[0032] In one embodiment, the cosmetic composition for increasing the skin adhesion of a makeup cosmetic comprises an amphiphilic polyurethane-based polymer, the type and content of which are as described above.

[0033] In the present invention, the cosmetic composition that increases the skin adhesion of a makeup cosmetic is used before using the makeup cosmetic, thereby improving the adhesion of the makeup cosmetic, thereby improving the problem of makeup floating, makeup coming off, or makeup sagging.

[0034] In one embodiment, the cosmetic film may be analyzed by analyzing the surface, cross section, and fracture area of ​​the cosmetic film to qualitatively determine whether or not the cosmetic film is formed.

[0035] First, the surface of the cosmetic film can be analyzed using an atomic force microscope (AFM, NX-10, Park System Co., Suwon, Korea) for three-dimensional (3D) surface analysis, and the presence or absence of a thin and uniform cosmetic film can be determined from the roughness parameters Spk, which indicates the average peak value, and Rpv, which indicates the maximum thickness minus the minimum thickness.

[0036] However, since the skin has curves, measuring the surface roughness alone is insufficient to determine whether the cosmetic film is uniform. Therefore, to confirm the actual formation of the cosmetic film, an objective judgment can be made through cross-sectional analysis. Such cross-sectional analysis can be performed using a field emission scanning electron microscope (FE-SEM, JSM-7001F, JEOL, Tokyo, Japan) for the analysis of 2D cross sections.

[0037] The surface and cross-sectional analysis of the cosmetic film can determine the application characteristics of the makeup, but is not suitable for evaluating the collapse of the cosmetic film. The collapse of the makeup is an important factor in an objective method of simulating muscle movement. In the present invention, a target motion simulation can be achieved by repeatedly folding and unfolding a sample with a cosmetic film on an artificial skin at the same speed and distance using a texture analyzer (TA XT plus, Stable Micro Systems, Cardiff, UK), and muscle movement can be simulated with a constant force.

[0038] In one embodiment, when a cosmetic composition that increases the skin adhesion of a makeup cosmetic according to the present invention is used compared to when no cosmetic composition is used, the Rpv(Max-Min) value of the formed cosmetic film may be reduced by 38% or more, 40% or more, 45% or more, or 48% or more.

[0039] In one embodiment, when a cosmetic composition that increases the skin adhesion of a makeup cosmetic according to the present invention is used compared to when no cosmetic composition is used, the Spk value of the cosmetic film may be reduced by 35% or more, 38% or more, 40% or more, or 43% or more.

[0040] In one embodiment, when a cosmetic composition that increases the skin adhesion of a makeup cosmetic according to the present invention is used compared to when no cosmetic composition is used, the cross-sectional thickness of the cosmetic film may be reduced by 45% or more, 50% or more, 52% or more, or 54% or more.

[0041] When the cosmetic composition with increased adhesion was not used, this means that a makeup cosmetic was applied to the skin without using the cosmetic composition according to the present invention (corresponding to "no application" in Experimental Example 1).

[0042] On the other hand, when a cosmetic composition that increases the skin adhesion of a makeup cosmetic containing an amphiphilic polyurethane-based polymer according to the present invention is used, it can improve the Rpv value by 230% or more, 250% or more, 280% or more, or 300% or more compared to a case in which the amphiphilic polyurethane-based polymer is not contained (corresponding to "no polymer" in Experimental Example 1), and it can improve the Spk value by 180% or more, 200% or more, 210% or more, or 220% or more.

[0043] The present invention also relates to the use of a composition containing an amphiphilic polyurethane-based polymer for producing a cosmetic composition that increases the skin adhesion of a makeup cosmetic.

[0044] The present invention will be described in detail with reference to the following examples. The following examples are merely illustrative of the present invention, and the scope of the present invention is not limited to the following examples. The following examples are provided to complete the disclosure of the present invention and to fully inform those skilled in the art of the present invention of the scope of the invention, and the present invention should be defined by the scope of the claims. EXAMPLES

[0045] Experimental Example 1. Evaluation of improvement in texture of cosmetic film

[0046] (1) Method Samples of O / W formulations were prepared with the compositions (wt%) shown in Table 1 below.

[0047] [Table 1]

[0048] Each sample was applied to Bio-Skin and then dried at room temperature for about 20-30 minutes. Liquid foundation (liquid FD) was then applied to each sample with a puff at the same time and weight to form a cosmetic film.

[0049] Afterwards, three-dimensional surface analysis of the cosmetic film was carried out using atomic force microscopy (AFM).

[0050] On the other hand, the case where no sample was applied to Bio-Skin and liquid foundation was applied was defined as "no application," and the case where the control sample was applied to Bio-Skin and then liquid foundation was applied was defined as "no polymer included."

[0051] (2) Results The results of analyzing the texture of the cosmetic film are shown in Table 2 below.

[0052] In Table 2, Spk is an index of reduced peak height, which means the average roughness of the peak part that is higher than the average thickness. Also, the Rpv value means the maximum thickness - the minimum thickness of the cosmetic film. The smaller the Rpv value, the thinner and more uniform the cosmetic film is, and the lower the Spk value, the smoother and more uniform the cosmetic film is. Meanwhile, the improvement rate in Table 2 was calculated using the following formula.

[0053] <Expression 1> Rpv improvement rate (%) = (RPV value of sample - Rpv value of "uncoated") / (Rpv value of "without polymer" - Rpv value of "uncoated") x 100

[0054] <Expression 2>> Spk improvement rate (%) = (Spk value of sample - Spk value of "uncoated") / (Spk value of "polymer" - Spk value of "uncoated") x 100

[0055] [Table 2]

[0056] As shown in Table 2, the PEG-240 / HDI Copolymer Bis-Decyltetradeceth-20 Ether, Polyurethane-15, and the mixture of PEG-240 / HDI Copolymer Bis-Decyltetradeceth-20 Ether and Polyurethane-15 have small Rpv(Max-Min) values, which confirms that the amphiphilic polyurethane polymer according to the present invention has an excellent effect of improving the texture of a cosmetic film.

[0057] In particular, the combination of PEG-240 / HDI Copolymer Bis-Decyltetradeceth-20 Ether and Polyurethane-15 can have a synergistic effect on improving skin texture.

[0058] Experimental Example 2. Evaluation of cross-sectional thickness of cosmetic film

[0059] (1) Method An essence without the technology applied and an essence with the technology applied were produced with the composition (wt%) in Table 3 below.

[0060] [Table 3]

[0061] The essence without technology and the essence with technology were applied to Bio-Skin and then dried at room temperature for about 20-30 minutes. Then, liquid foundation was applied with a puff the same number of times and in the same weight to form a cosmetic film, and the cosmetic film transfer material was applied. The transfer material (epoxy resin) of the cosmetic film was dried and then peeled off. An additional transfer material (epoxy resin) was applied to the opposite side of the peeled cosmetic film (the side that was in contact with Bio-Skin before peeling off). After drying, a sandwich-type sample of transfer material / cosmetic film / transfer material was produced.

[0062] Then, the cross section was cut using a cross section polishing machine and analyzed by SEM analysis (FE-SEM, JSM-7001F, JEOL, Tokyo, Japan). To further confirm that the analyzed data was the actual composition layer, EDS elemental analysis was performed to measure the titanium (Ti) element content of the TiO2 powder in the decorative film and the carbon (C) element content in the epoxy resin for a more detailed analysis.

[0063] Figure 1 shows a cross-sectional SEM image (a), a C element EDS image (b), and a Ti element EDS image (c) of the essence to which the technology has not been applied, as well as a cross-sectional SEM image (d), a C element EDS image (e), and a Ti element EDS image (f) of the essence to which the technology has been applied.

[0064] As shown in Figure 1, carbon (C) element analysis confirmed that the materials above and below the cosmetic film are polymer transfer materials, and titanium (Ti) analysis confirmed that the cosmetic film was formed in the indicated area. Also, the cosmetic aggregation phenomenon was confirmed in the essence where the technology was not applied.

[0065] It can be seen with the naked eye that the essence with the technology applied formed a thinner and more uniform cosmetic film than the essence without the technology applied. When the cross-sectional thickness of each cosmetic film was measured, the essence without the technology applied was 4.91 μm, while the essence with the technology applied was 2.27 μm. This confirms that the thickness is reduced by about 54% when the technology of the present invention is applied.

[0066] Experimental example 3. Evaluation of makeup film and makeup uniformity depending on the type of polymer

[0067] (1) Method In this experiment, the polymer was not included in the formulation, but was dispersed in purified water (DI water) or D5 (silicone oil) at the same concentration, and then applied to artificial skin, followed by applying foundation to observe the state of the cosmetic film formed.

[0068] First, Samples 3-1 to 3-6 containing the polymers shown in Table 4 below were produced.

[0069] Specifically, purified water was used as the solvent for polymers 1 to 3, and D5 was used as the solvent for polymers 4 to 6. The polymers were dispersed in the solvents at 1 wt % each to produce samples 3-1 to 3-6.

[0070] [Table 4]

[0071] To simulate the formation of a cosmetic film on real skin, we used an artificial skin (artificial leather or bio-skin) that is often used to evaluate color-tone cosmetic conditions. Artificial leather (polyurethane synthetic leather fabric plain) is widely used for evaluations such as the application of color-tone cosmetics. Bio-skin (Beaulax, Co. Ltd., Tokyo, surface free energy, γs = 31.5 mJ / m 2 ) was chosen because its surface energy is within the surface energy range of human skin.

[0072] The evaluation of the cosmetic uniformity was carried out as follows.

[0073] 1) The surface of the artificial leather was washed with ethanol and dried for about 20 minutes, after which 0.1g of each sample was applied to the artificial leather (when applying, the sample was rubbed with another artificial leather to apply it evenly to the surface).

[0074] 2) After the artificial leather to which the sample was applied was thoroughly dried, the same amount of liquid foundation (liquid FD) as the sample was applied 10 times with the same weight using a puff.

[0075] 3) After the liquid foundation was applied to the artificial skin, it was dried thoroughly and then measured under a temporary blackout curtain at the same height, position and lighting conditions before replicating the movements to obtain primary data.

[0076] 4) After photographic measurement, the movement was replicated using a texture analysis device (TA XT plus, Stable Micro Systems, Cardiff, UK) and the above method was repeated to obtain secondary data.

[0077] 5) The acquired image data was analyzed using the Image Analysis Tool (Image Pro) program to set the same area to the same brightness, and then the makeup spreadability / makeup breakdown was analyzed using the ratio of dark areas.

[0078] (2) Results Table 5 below shows the evaluation results of cosmetic uniformity on artificial leather according to the type of polymer.

[0079] In this experimental example, in order to distinguish between dark and non-dark areas, the brightness was measured when the cosmetic film was physically peeled off using a blade, and the area with a lower brightness value was defined as a "dark area." Therefore, the larger the dark area, the more the makeup was not applied properly or the makeup was damaged. The makeup improvement rate was calculated according to the following formula.

[0080] <Expression 3>> Makeup improvement rate (%) = (dark area % without application - dark area % with sample) / dark area % without application x 100

[0081] [Table 5]

[0082] As shown in Table 5, it can be seen that the amphiphilic polyurethane polymer PEG-240 / HDI copolymer bis-Decyltetradeceth-20 Ether (Sample 3-1) is more advantageous in forming a cosmetic film than silicone and dimethicone-based resins used in color tones, and Carbomer (surface energy: 50) and Acrylates / C10-30 Alkyl Acrylate Crosspolymer (surface energy: 33) used as film formers and thickeners in basic cosmetics.

[0083] In addition, after mimicking the movement, it can be confirmed that the amphiphilic polyurethane polymer PEG-240 / HDI copolymer bis-Decyltetradeceth-20 Ether (sample 3-1) has an excellent cosmetic film retention effect.

[0084] Experimental example 4. Questionnaire survey

[0085] (1) Method The questionnaire survey was conducted in a home-user test under the supervision of a skilled questionnaire survey evaluation specialist, targeting female volunteers aged 20-49 (n=33, 20s: 10, 30s: 13, 40s: 10). The volunteers were randomly divided into two groups, and the first group was administered the essence of Experimental Example 2 without the technology for 10 days, followed by the essence of Experimental Example 2 with the technology for 10 days, while the second group was administered the essence of Experimental Example 2 with the technology for 10 days, followed by the essence of Experimental Example 2 without the technology for 10 days, followed by the evaluation every 10 days. All evaluations were conducted blindly. None of the volunteers showed any allergic reactions such as redness or itching of the facial skin during the test.

[0086] (2) Results Besides objective and quantifiable evaluation, what is most important in the cosmetics field is the efficacy perceived by the consumer. In fact, many studies have been conducted to link tactile evaluation results with objective parameters.

[0087] In this experimental example, a consumer evaluation was carried out to confirm the correlation between the physical evaluations of Experimental Examples 1 to 3 and the consumer's evaluation of perceived efficacy.

[0088] Phenomena related to makeup were analyzed among 33 women in their 20s-40s who wear makeup five or more days a week, and the results are shown in Table 6. [Table 6]

[0089] First, in the evaluation of makeup satisfaction, the satisfaction rate when using the essence with the technology of the present invention was 86%, and it was confirmed that the satisfaction rate was improved by approximately 72% when compared to the essence without the technology.

[0090] In addition, the makeup adhesion and skin texture were evaluated in relation to the results of analyzing the surface, cross section, and fracture site of the existing cosmetic film. In terms of adhesion, satisfaction rate when using the essence with the technology was 82.8%, which is about 25.8% higher than when using an essence without the technology. Similarly, in terms of skin texture softness, satisfaction rate when using the essence with the technology was 80%, which is 39.8% higher than when using an essence without the technology.

[0091] These results confirm that methods to increase the affinity of the skin / cosmetic film are effective in improving the actual consumer experience. Therefore, a meaningful correlation can be confirmed by comparing the results of the cosmetic film condition analysis with the evaluation results of the usability. [Industrial Applicability]

[0092] In the present invention, the amphiphilic polyurethane polymer can increase the affinity between the skin and the cosmetic film, and can actually affect the formation of the cosmetic film.

[0093] This conclusion can be confirmed through surface roughness, cross-sectional SEM image analysis, EDS elemental analysis, and fracture cross-sectional area analysis in the examples. The cosmetic film analysis method proposed in the present invention not only allows for more objective quantitative analysis of cosmetic films beyond the existing limitations, but also correlates with efficacy as perceived by consumers. Therefore, the present invention can be applied to the future field of cosmetic film analysis.

Claims

1. A cosmetic composition for increasing skin adhesion of a makeup cosmetic, comprising an amphiphilic polyurethane-based polymer, the amphiphilic polyurethane-based polymer comprising polyurethane-15, the content of the amphiphilic polyurethane-based polymer being 0.01 to 1 wt % based on the total weight of the composition.

2. The cosmetic composition according to claim 1, wherein the amphiphilic polyurethane polymer further comprises a PEG-240 / HDI Copolymer Bis-Decyltetradeceth-20 Ether.

3. The cosmetic composition for increasing the skin adhesion of a makeup cosmetic according to claim 1, characterized in that the cosmetic composition is used before makeup to improve the adhesion of the makeup cosmetic, thereby improving the makeup from floating, coming off, or sagging.

4. The cosmetic composition according to claim 1, wherein the cosmetic composition is in the form of at least one selected from the group consisting of skin care products, sun care products, and makeup base products.

5. A step of applying to the skin a cosmetic composition that increases the skin adhesion of the makeup cosmetic according to claim 1; and A method for applying a cosmetic composition for increasing the skin adhesion of a makeup cosmetic, comprising the step of applying the makeup cosmetic to form a cosmetic film.

6. The method for applying a cosmetic composition that increases the skin adhesion of a makeup cosmetic according to claim 5, wherein, when the cosmetic composition that increases the skin adhesion of a makeup cosmetic is used, the Rpv(Max-Min) value of the formed cosmetic film is reduced by 38% or more, or the Spk value of the cosmetic film is reduced by 35% or more, compared to when no cosmetic composition is used.

7. The method for applying a cosmetic composition that increases the skin adhesion of a makeup cosmetic according to claim 5, characterized in that the cross-sectional thickness of the cosmetic film is reduced by 45% or more when the cosmetic composition that increases the skin adhesion of the makeup cosmetic is used compared to when the cosmetic composition is not used.

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