Oil-dispersed cosmetic composition with excellent cleansing efficacy, comprising hydrogenated castor oil / sebacic acid copolymer

Abstract

The present invention relates to an oil-dispersed cosmetic composition having excellent cleansing efficacy and, more specifically, to an oil-dispersed cosmetic composition having excellent cleansing efficacy and formulation stability by optimally mixing a hydrogenated castor oil / sebacic acid copolymer as an oil thickener with at least two types of surfactants.

Description

Oil-dispersed cosmetic composition with excellent cleansing efficacy comprising hydrogenated castor oil / sebasic acid copolymer

[0001] The present invention relates to an oil-dispersed cosmetic composition having excellent cleansing efficacy, and specifically, to an oil-dispersed cosmetic composition having excellent cleansing efficacy and formulation stability by optimally combining hydrogenated castor oil / sebacic acid copolymer as an oil thickener with two or more surfactants.

[0002] Cleansing cosmetic compositions serve to cleanse makeup applied to the skin and to keep the skin clean. Depending on the ingredients, cleansing cosmetic compositions are classified into water-based cleansing cosmetics containing water-based ingredients as the main component with surfactants as needed; emulsified cleansing cosmetics containing water-based ingredients, oil-based ingredients, and surfactants; oil-based cleansing cosmetics containing oil-based ingredients as the main component with surfactants as needed; and powder-based cleansing cosmetics containing hydrophilic surfactant powder and enzymes.

[0003] Due to the water-like texture of water-based cleansing products, not only is it inconvenient to have to wipe them off with a tissue, but there is also a possibility of skin irritation caused by physical abrasions during the wiping process. Furthermore, there is the inconvenience of having to perform an additional water-based cleansing using foam cleanser or soap due to residue remaining even after wiping with a tissue.

[0004] Furthermore, emulsified cleansing cosmetics contain large quantities of various emulsifiers and formulation stabilizers to ensure formulation stability. These emulsifiers and formulation stabilizers are ingredients unrelated to the purpose of cleansing and may cause skin irritation; additionally, since the amount capable of stable emulsification is limited, there is a disadvantage in that there are limitations in incorporating active ingredients that aid in skin cleansing and moisturization.

[0005] In addition, with the recent increase in the use of waterproof products to improve makeup longevity, there is a growing demand for oil-based cleansing cosmetics to provide excellent cleansing efficacy against waterproof products.

[0006] Accordingly, the inventors continued research to prepare a cosmetic composition with excellent cleansing efficacy for various makeup products. As a result, they confirmed that by optimally combining a specific oil thickener and a surfactant, it is possible to prepare an oil-dispersed cosmetic composition that possesses excellent cleansing efficacy for many products while also having excellent formulation stability, allowing for long-term use, thereby completing the present invention.

[0007] The present invention aims to provide an oil-dispersed cosmetic composition with excellent cleansing efficacy comprising a hydrogenated castor oil / sebacic acid copolymer.

[0008] 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.

[0009] According to an embodiment of the present invention, a cosmetic composition having excellent cleansing efficacy is provided, comprising an oil thickener and two or more surfactants, wherein the oil thickener comprises a hydrogenated castor oil / sebacic acid copolymer.

[0010] The cosmetic composition of the present invention can have significantly superior cleansing efficacy for various cosmetics by optimally combining a specific oil thickener and two or more specific surfactants.

[0011] In addition, the above cosmetic composition has excellent formulation stability, making it easy to store for a long period of time.

[0012] A brief description of each drawing is provided to help to better understand the drawings cited in the detailed description of the invention.

[0013] Figure 1a shows a photograph taken after applying foundation, lipstick, eyeliner, and mascara products to the back of the hand to evaluate cleansing power.

[0014] FIG. 1b shows a photograph taken after washing the back of a hand on which foundation, lipstick, eyeliner, and mascara products were applied by applying Example 1 or Comparative Examples 1 to 5.

[0015] FIG. 1c shows a photograph taken after storing Example 1 or Comparative Examples 1 to 5 under cycle conditions.

[0016] FIG. 2a shows a photograph taken after washing the back of a hand on which foundation, lipstick, eyeliner, and mascara products were applied by applying Comparative Examples 6 to 11.

[0017] FIG. 2b shows photographs taken after storing Comparative Examples 6 to 11 under cycle conditions.

[0018] According to an embodiment of the present invention, a cosmetic composition having excellent cleansing efficacy is provided, comprising an oil thickener and two or more surfactants, wherein the oil thickener comprises a hydrogenated castor oil / sebacic acid copolymer.

[0019] In addition, the above two or more surfactants may include Sorbeth-30 Tetraoleate and Sorbitan Sesquioleate.

[0020] In addition, the hydrogenated castor oil / sebacic acid copolymer may be included in an amount of 0.2 to 2 weight percent based on the total weight of the cosmetic composition.

[0021] In addition, the Solves-30 tetraoleate may be included in an amount of 7 to 23 weight percent based on the total weight of the cosmetic composition.

[0022] In addition, the sorbitan sesquioleate may be included in an amount of 0.2 to 8 weight percent based on the total weight of the cosmetic composition.

[0023] In addition, the above cosmetic composition may be an oil-dispersed formulation.

[0024] 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.

[0025] 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.

[0026]

[0027] According to an embodiment of the present invention, a cosmetic composition having excellent cleansing efficacy is provided, comprising an oil thickener and two or more surfactants, wherein the oil thickener comprises a hydrogenated castor oil / sebacic acid copolymer. The inventors have confirmed that by optimally combining the above-mentioned oil thickener with two or more surfactants, it is possible to produce a cosmetic composition that not only exhibits significantly excellent cleansing efficacy but also has excellent formulation stability, allowing for long-term storage and use.

[0028] In one embodiment, the hydrogenated castor oil / sebacic acid copolymer may be included in an amount of 0.2 to 2 weight% based on the total weight of the cosmetic composition, specifically 0.3 to 1.8 weight%, and more specifically 0.5 to 1.5 weight%. When the hydrogenated castor oil / sebacic acid copolymer is included in the above amounts, both excellent cleansing efficacy and excellent formulation stability can be secured. However, it is not limited thereto.

[0029] In one embodiment, the two or more surfactants of the present invention may include Sorbeth-30 Tetraoleate and Sorbitan Sesquioleate. Sorbeth-30 Tetraoleate is a polyoxyethylene (POE)-based surfactant with an excellent balance of hydrophilicity and hydrophobicity, and exhibits excellent cleaning efficacy against both aqueous and oily components. Sorbitan Sesquioleate is a sorbitan ester-based surfactant that is particularly effective for cleaning oily components and is easy to apply to various sensitive skin types due to its low irritation. The inventors have confirmed that significantly superior cleaning efficacy can be achieved when the two surfactants are optimally combined.

[0030] In one embodiment, Solves-30 tetraoleate may be included in an amount of 7 to 23 weight% based on the total weight of the cosmetic composition, specifically in an amount of 10 to 20 weight%. If Solves-30 tetraoleate is included in a small amount less than the above amount, the cleansing efficacy may be reduced, and if it is included in an excessive amount more than the above amount, the formulation stability may be reduced. However, it is not limited thereto.

[0031] In one embodiment, sorbitan sesquioleate may be included in an amount of 0.2 to 8 weight% based on the total weight of the cosmetic composition, specifically 0.5 to 7 weight%, and more specifically 0.5 to 5 weight%. If sorbitan sesquioleate is included in a small amount less than the above amount, the cleansing efficacy may be reduced, and if it is included in an excessive amount more than the above amount, the formulation stability may be reduced. However, it is not limited thereto.

[0032] In one embodiment, hydrogenated castor oil / sebacic acid copolymer as an oil thickener may be included in an amount of 0.2 to 2 weight% based on the total weight of the cosmetic composition, specifically 0.3 to 1.8 weight%, more specifically 0.5 to 1.5 weight%, Solves-30 tetraoleate may be included in an amount of 7 to 23 weight% based on the total weight of the cosmetic composition, specifically 10 to 20 weight%, and sorbitan sesquioleate may be included in an amount of 0.2 to 8 weight% based on the total weight of the cosmetic composition, specifically 0.5 to 7 weight%, more specifically 0.5 to 5 weight%.

[0033]

[0034] In one embodiment, the cosmetic composition of the present invention may include at least one of an oil, a skin conditioning agent, a powder, and a dispersant.

[0035] The above oil can function as a solvent for the useful components in the composition, and can exhibit skin moisturizing effects by improving skin adhesion and blocking moisture evaporation.

[0036] In one embodiment, the oil may be used without limitation as long as it is a component used as an oil in the art. Examples of the oil may include at least one of hydrocarbon oils, ester oils, ether oils, triglyceride oils, vegetable oils, and silicone oils, and specific examples include hydrocarbon oils including squalane, mineral oil, hydrogenated polydecene, hydrogenated polyisobutene, etc.; Ester-based oils comprising at least one of isopropyl palmitate, 2-octyldodecyl myristate, isopropyl myristate, butyloctyl salicylate, ethylhexyl pelargonate, cetyl octanoate, cetyloctyl hexanoate, cococaprylate / caprate, decyl cocoate, isostearyl isostearate, pentaerythrityl tetraethylhexanoate, dicaprylyl carbonate, ethylhexyl palmitate, and cetyl ethylhexanoate; ether-based oils comprising dicaprylyl ether, etc.; vegetable oils comprising castor oil, olive oil, jojoba oil, avocado oil, macadamia oil, meadowfoam seed oil, etc.; and at least one silicone oil comprising at least one of dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, methyltrimethicone, phenyltrimethicone, cyclomethicone, dimethicone, and cyclohexasiloxane; there may be at least one selected from among these. However, it is not limited thereto.

[0037] In one embodiment, the oil may be included in an amount of 5 to 80 weight% based on the total weight of the cosmetic composition, specifically 10 to 80 weight%, and more specifically 20 to 80 weight%. However, it is not limited thereto.

[0038] The above-mentioned skin conditioning agent can improve the condition of the skin through actions such as maintaining the skin soft and flexible and / or maintaining or increasing the skin's moisture retention.

[0039] In one embodiment, the skin conditioning agent may be used without limitation as long as it is an ingredient used as a skin conditioning agent in the art. Examples of the skin conditioning agent may include natural extracts containing at least one of soapwort extract, rice extract, oat flour extract, and soybean extract. However, it is not limited thereto.

[0040] In one embodiment, the skin conditioning agent may be included in an amount of 0.000001 to 5 weight% based on the total weight of the cosmetic composition, and specifically in an amount of 0.000001 to 3 weight%. However, it is not limited thereto.

[0041] The above powder can contribute to the formation of a stable formulation by appropriately forming the viscosity of the formulation and can exhibit a cleaning aid effect.

[0042] In one embodiment, the powder may be used without limitation as long as it is a component used as a powder in the art. Examples of the powder may include at least one inorganic powder comprising at least one of calamine, kaolin, bentonite, hectorite, zinc oxide, and boron nitride; and at least one naturally derived powder comprising at least one of charcoal powder and buckwheat flour. However, it is not limited thereto.

[0043] In one embodiment, the powder may be included in an amount of 0.00001 to 5 weight% based on the total weight of the cosmetic composition, and specifically in an amount of 0.0001 to 1 weight%. However, it is not limited thereto.

[0044] The above-mentioned dispersant can contribute to the formation of a stable suspension by improving the dispersion stability of particles, such as powders, within the formulation.

[0045] In one embodiment, the dispersant may be used without limitation as long as it is a component used as a dispersant in the art. Examples of the dispersant may include one or more selected from the group consisting of polyglyceryl-2-dipolyhydroxystearate, nitrocellulose, silica, quaternium-18, silica dimethylsilylate, and polycaprolactone. However, it is not limited thereto.

[0046] In one embodiment, the dispersant may be included in an amount of 1 to 9 weight% based on the total weight of the cosmetic composition, specifically in an amount of 1 to 6 weight%. However, it is not limited thereto.

[0047]

[0048] In one embodiment, the cosmetic composition of the present invention may further include at least one of a preservative, an antioxidant, a binder, and a fragrance. At least one of the preservative, antioxidant, binder, and fragrance may be any ingredient commonly used in the art without limitation.

[0049] In addition to this, the cosmetic composition of the present invention may further include ingredients included in general cosmetic compositions, such as, for example, emulsifying stabilizers, conditioning agents, ion-chelating agents, disinfectants, pH adjusters, alcohols, plant extracts, texture modifiers, emollients, etc.

[0050] The amounts of the aforementioned ingredients are 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 effects of the present invention.

[0051]

[0052] The cosmetic composition according to an embodiment of the present invention may be provided in a formulation conventionally manufactured in the art to the extent that it does not impair the technical features of the invention. Specifically, the cosmetic composition may be provided in an oil-dispersed formulation. By being provided in an oil-dispersed formulation, it can exhibit excellent cleansing efficacy for various types of makeup cosmetics.

[0053] In one embodiment, the cosmetic composition of the present invention may be manufactured into any product conventionally produced in the art. For example, the cosmetic composition may be manufactured into various items for cleansing purposes, such as hair shampoo, body wash, facial cleansing oil, and hair rinse, but is not limited thereto.

[0054]

[0055] In the following, examples and experimental examples are presented to further explain the present invention in more detail, but the present invention is not limited thereto.

[0056]

[0057] Experimental Example 1. Comparative experiment according to the type of oil thickener or surfactant

[0058]

[0059] (1) Preparation of Examples and Comparative Examples

[0060] In order to compare the effects according to the type of oil thickener or surfactant in the implementation of the present invention, cosmetic compositions of the oil-dispersed formulations of the Examples and Comparative Examples were prepared using the ingredients and contents listed in Table 1 below. Specifically, in Example 1, hydrogenated castor oil / sebacic acid copolymer was used as the oil thickener, sorbes-30 tetraoleate and sorbitan sesquioleate were used as surfactants, and calamine was used as a powder. In Comparative Example 1, hydrogenated palm oil was used as the oil thickener, in Comparative Example 2, dextrin palmitate was used as the oil thickener, and in Comparative Example 3, hydrogenated vegetable oil was used as the oil thickener, and the remaining ingredients and contents of Comparative Examples 1 to 3 are the same as those of Example 1. In addition, Comparative Examples 4 and 5 did not include either of the two surfactants of Example 1, and increased the content of the surfactant included by an amount equal to the component of the surfactant not included, while keeping the remaining components and content the same as in Example 1. The units in Table 1 are weight%.

[0061]

[0062]

[0063] The specific manufacturing method is as follows.

[0064] After first mixing each component listed in Table 1 above, the examples and comparative examples were completed by uniformly mixing for 10 minutes using a stirrer at a temperature of 75°C.

[0065]

[0066] (2) Evaluation of cleaning power

[0067] The cleaning efficacy of the examples and comparative examples prepared as described above was evaluated. Specifically, commercially available foundation, lipstick, eyeliner, and mascara products were each applied to the back of the hand, and then the example or comparative example was applied to the back of the hand with the products applied, and rolled 10 times from side to side. Afterward, the back of the hand was rinsed with water, and the products were visually observed to see if they were properly cleaned. Table 2 below shows the results of the cleaning power evaluation according to the above method, Figure 1a shows a photograph of the back of the hand after applying the foundation, lipstick, eyeliner, and mascara products in order, and Figure 1b shows a photograph of the back of the hand after cleaning it with the example or comparative example.

[0068]

[0069] (3) Formulation stability evaluation

[0070] The formulation stability of the examples and comparative examples prepared as described above was evaluated. Specifically, for the formulation stability evaluation, the prepared examples and comparative examples were stored for one month under high temperature (50°C), room temperature (25°C), low temperature (5°C), and high to low temperature cycle conditions to evaluate whether the oil-dispersed formulation remained stable as it was immediately after preparation. Table 2 below shows the results of the formulation stability evaluation according to the above method, and Figure 1c shows a photograph taken after storing the examples or comparative examples under cycle conditions.

[0071]

[0072]

[0073] According to Table 2 and Figures 1b to 1c above, Example 1, which contains hydrogenated castor oil / sebacic acid copolymer as an oil thickener and sorbes-30 tetraoleate and sorbitan sesquioleate as surfactants, was confirmed to have excellent cleaning efficacy, with all four types of products being cleanly removed, and it was also confirmed to have excellent formulation stability, with the formulation maintained immediately after manufacturing for a long period.

[0074] On the other hand, in Comparative Examples 1 to 3, in which the oil thickener was substituted with an equal amount of another component, it was confirmed that the formulation stability was poor and precipitates formed at the bottom of the formulation. In addition, in Comparative Example 2, in which dextrin palmitate was used as the thickener, the cleaning efficacy was also poor, confirming that excellent cleaning efficacy and a stable formulation can be formed through the combination of the specific oil thickener of the present invention and two types of surfactants.

[0075] In the case of Comparative Examples 4 and 5, which contained only one of the two surfactants of the present invention, it was confirmed that the formulation was stable but the cleaning efficacy was poor.

[0076] Therefore, it was confirmed that including a specific oil thickener and a specific surfactant is an essential component in implementing the cosmetic composition of the present invention, which has excellent cleansing efficacy and a stable formulation.

[0077]

[0078] Experimental Example 2. Comparative experiment according to oil thickener or surfactant content

[0079]

[0080] (1) Preparation of Examples and Comparative Examples

[0081] In order to determine the optimal content of the oil thickener or surfactant in the implementation of the present invention, examples and comparative examples were prepared in the same manner as Experimental Example 1 by changing only the content of the oil thickener or surfactant based on Example 1 as shown in Table 3 below. The units in Table 3 are weight%.

[0082]

[0083]

[0084] (2) Evaluation of cleaning power

[0085] The cleaning efficacy of the comparative example prepared as described above was evaluated using the same method as in Experimental Example 1, and the results are shown in Table 4 below. In addition, Figure 2a shows a photograph taken after applying the comparative example to the back of the hand and cleaning it.

[0086]

[0087] (3) Formulation stability evaluation

[0088] The formulation stability of the comparative example was evaluated as described above using the same method as in Experimental Example 1, and the results are shown in Table 4 below. In addition, Figure 2b shows a photograph taken after storing the comparative example under cycle conditions.

[0089]

[0090]

[0091] According to Table 4 and Figures 2a and 2b above, Comparative Example 6, which contained a small amount of hydrogenated castor oil / sebacic acid copolymer, showed poor formulation stability, resulting in precipitates at the bottom of the formulation, and its cleaning power was also poor compared to the examples. In addition, Comparative Examples 7, 9, and 11, which contained an excess amount of hydrogenated castor oil / sebacic acid copolymer, sorbes-30 tetraoleate, or sorbitan sesquioleate, were found to have unstable formulations, as gelling of the formulations was induced, causing phase separation to occur with an oil layer in the upper layer and a gel layer in the lower layer. Furthermore, Comparative Examples 8 and 10, which contained a small amount of sorbes-30 tetraoleate or sorbitan sesquioleate, were found to have poor cleaning efficacy.

[0092] Therefore, it was confirmed that in implementing the cosmetic composition of the present invention, which has excellent cleansing efficacy and a stable formulation, it is important to include a specific oil thickener and a specific surfactant in appropriate amounts.

[0093]

[0094] In conclusion, as can be seen in Experimental Examples 1 and 2 above, it was confirmed that a cosmetic composition with significantly improved cleansing ease and stable formulation can be prepared by optimally combining a specific oil thickener and a specific surfactant.

[0095]

[0096] 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

1. In a cosmetic composition having excellent cleansing efficacy, It comprises an oil thickener and two or more types of surfactants, and The above oil thickener is a cosmetic composition comprising a hydrogenated castor oil / sebacic acid copolymer.

2. In Paragraph 1, The above two or more surfactants comprise a cosmetic composition including sorbes-30 tetraoleate and sorbitan sesquioleate.

3. In Paragraph 1, A cosmetic composition in which the above hydrogenated castor oil / sebacic acid copolymer is included in an amount of 0.2 to 2 weight% based on the total weight of the cosmetic composition.

4. In Paragraph 2, A cosmetic composition comprising the above Solves-30 tetraoleate in an amount of 7 to 23 weight% based on the total weight of the cosmetic composition.

5. In Paragraph 2, A cosmetic composition comprising the above sorbitan sesquioleate in an amount of 0.2 to 8 weight% based on the total weight of the cosmetic composition.

6. In Paragraph 1, The above cosmetic composition is a cosmetic composition in the form of an oil-dispersed formulation.

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