Emulsified cosmetic composition containing high content of salts

Abstract

The present invention relates to an emulsified cosmetic composition containing a high content of salts and, more specifically, to an emulsified cosmetic composition which contains three or more emulsifiers and thus has a stable formulation while containing a high content of salts. The emulsified cosmetic composition according to the present invention contains three or more emulsifiers having different HLB values and thus has uniform particles without a decrease in viscosity or coalescence of particles even when containing a high content of salts, and has an excellent effect of being stably maintained without a layer separation phenomenon even at a wide range of temperatures and for long-term storage.

Description

Emulsified cosmetic composition containing a high salt content

[0001] The present invention relates to an emulsified cosmetic composition containing a high salt content, and more specifically, to an emulsified cosmetic composition containing a high salt content but having a stable formulation by containing three or more types of emulsifiers.

[0002] In general, emulsified cosmetic compositions are classified into two types: water-in-oil (W / O) and oil-in-water (O / W). Both types combine the advantages of both oil and water phases, providing moisturizing and softening effects to the skin.

[0003] Meanwhile, salt refers to substances that become ions when they enter water. In cosmetic compositions, salt can provide skin elasticity and moisturizing effects, or contribute to stabilizing functional active ingredients such as vitamins. When salt is added to an emulsified formulation such as an oil-in-water type, the water phase that constitutes the outer phase contains salt, and at this time, there is a problem that the salt affects the interface of the emulsified particles, thereby reducing the emulsification stability. In other words, in emulsified cosmetics, an excessive amount of salt weakens the function of the thickener, lowering the dispersibility of the particles, and weakens the function of the surfactant, thereby lowering the stability of the particles, making it difficult to apply a high salt content.

[0004] Accordingly, the inventors of the present invention have continued research to develop an emulsified cosmetic having a high salt content and excellent emulsification stability, and as a result, they have confirmed that an emulsified cosmetic composition having uniform particles without a decrease in viscosity or particle coalescence and capable of stable storage over a wide temperature range and for a long period of time can be manufactured by using three or more different emulsifiers, thereby completing the present invention.

[0005] The present invention is intended to solve the problem of reduced stability when containing a high salt content, and its purpose is to provide a stable emulsified cosmetic composition in which particle sizes are uniformly distributed without layer separation even over a wide range of temperatures and long-term storage, and a cosmetic product including the same.

[0006] The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0007] According to an embodiment of the present invention, an emulsified cosmetic composition is provided, which comprises three or more selected from the group consisting of sodium stearoyl glutamate, polyglyceryl-3 methyl glucose distearate, glyceryl stearate, and sorbitan monostearate, and contains a salt.

[0008] The emulsified cosmetic composition according to the present invention has an excellent effect of having uniform particles without a decrease in viscosity or coalescence of particles even if it contains a high content of salts by including three or more emulsifiers having different HLB values, and is stably maintained without a layer separation phenomenon even over a wide range of temperatures and long-term storage.

[0009] Since the cosmetic composition of the present invention has excellent emulsion stability even when it contains a high content of salt, it can contain a high content of functional active ingredients.

[0010] In order to more fully understand the drawings cited in the detailed description of the present invention, a brief description of each drawing is provided.

[0011] Figure 1 is a diagram showing the results of observing changes in particle size according to temperature change and time elapsed under a microscope for a composition according to Example 1.

[0012] Figure 2 is a diagram showing the results of observing changes in particle size according to temperature change and time elapsed using a microscope for a composition according to Comparative Example 5.

[0013] Figure 3 is a diagram showing the results of observing changes in particle size according to temperature change and time elapsed under a microscope for a composition according to Comparative Example 8.

[0014] Figure 4 is a diagram showing the results of observing changes in particle size according to temperature change and time elapsed under a microscope for a composition according to Comparative Example 9.

[0015] Figure 5 is a diagram showing the results of observing changes in particle size according to temperature change and time elapsed under a microscope for a composition according to Comparative Example 11.

[0016] Figure 6 is a diagram showing the results of observing changes in particle size according to temperature change and time elapsed under a microscope for a composition according to Comparative Example 12.

[0017] According to an embodiment of the present invention, an emulsified cosmetic composition is provided, which comprises three or more selected from the group consisting of sodium stearoyl glutamate, polyglyceryl-3 methyl glucose distearate, glyceryl stearate, and sorbitan monostearate, and contains a salt.

[0018] Additionally, the cosmetic composition may contain 0.1 to 15 wt% of salt based on the total weight of the cosmetic composition.

[0019] Additionally, the cosmetic composition may further include 0.05 to 1 wt% of sodium stearoyl glutamate based on the total weight of the cosmetic composition.

[0020] Additionally, the cosmetic composition may contain 0.1 to 3 wt% of polyglyceryl-3 methyl glucose distearate based on the total weight of the cosmetic composition.

[0021] Additionally, the cosmetic composition may contain glyceryl stearate in an amount of 0.05 to 1 wt% based on the total weight of the cosmetic composition.

[0022] Additionally, the cosmetic composition may contain 0.05 to 1 wt% of sorbitan monostearate based on the total weight of the cosmetic composition.

[0023] In addition, the cosmetic composition may contain 1.5 to 5 wt% of three or more emulsifiers selected from the group consisting of sodium stearoyl glutamate, polyglyceryl-3 methyl glucose distearate, glyceryl stearate, and sorbitan monostearate, based on the total weight of the cosmetic composition.

[0024] Additionally, the cosmetic composition may contain 1 to 10 wt% of oil based on the total weight of the cosmetic composition.

[0025] Additionally, the cosmetic composition may additionally contain a moisturizer, a preservative, or a functional ingredient.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention pertains. In general, the nomenclature used herein is well known and commonly used in the art. In addition, when describing embodiments of the present invention, if a detailed description of a related known structure or function is judged to hinder the understanding of the embodiments of the present invention, a detailed description thereof will be omitted. In addition, although embodiments of the present invention will be described below, the technical idea 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.

[0027] When a part in this specification is said to include a certain component, this does not exclude other components, unless otherwise specifically stated, but rather means that other components may be included. In this specification, the term "and / or" includes a combination of multiple related items or any one of multiple related items.

[0028]

[0029] According to an embodiment of the present invention, an emulsified cosmetic composition is provided.

[0030] A cosmetic composition according to an embodiment of the present invention comprises at least three kinds of emulsifiers selected from the group consisting of sodium stearoyl glutamate, polyglyceryl-3 methylglucose distearate, glyceryl stearate, and sorbitan monostearate, and is characterized by containing a salt.

[0031] Salts are ionic compounds in which anions of acids and cations of bases are combined by electrostatic attraction. In the present invention, salts are broadly defined as substances that become ions when added to water. For example, ammonium salts, potassium salts, sodium salts, calcium salts, aluminum salts, zinc salts, magnesium salts, amine salts, carbonates, nitrates, and SO4. 2-, F-, Cl-, Br-, I-, and specifically, it may be at least one selected from the group consisting of ammonium lactate, potassium lactate, sodium lactate, calcium lactate, aluminum lactate, TEA-lactate, zinc lactate, magnesium lactate, and cysteamine HCl, but these are only examples of salts that may be included in the cosmetic composition and are not limited thereto.

[0032] In an embodiment, the salt may be included in an amount of 0.1 to 15 wt%, preferably 5 to 10 wt%, and more preferably 8 to 10 wt%, based on the total weight of the cosmetic composition. Since the cosmetic composition of the present invention has excellent emulsification stability without deteriorating particle stability and dispersibility even when containing a high amount of salt, it can contain a high amount of functional active ingredients. In the cosmetic composition, the salt can provide effects such as elasticity and moisturizing power to the skin, or can impart effects such as preventing and strengthening skin barrier damage, promoting cell regeneration, and anti-inflammation. In addition, the salt can regulate the moisture balance inside and outside skin cells, activate cell energy, and contribute to stabilizing functional active ingredients such as vitamins. Therefore, a cosmetic composition containing a high amount of salt can provide various effects to the skin, and can exhibit excellent skin improvement effects. Additionally, if salt is included, it is possible to apply seawater containing minerals and various trace elements such as magnesium, calcium, and potassium to cosmetics.

[0033]

[0034] In the present invention, sodium stearoyl glutamate, polyglyceryl-3 methyl glucose distearate, glyceryl stearate, and sorbitan monostearate are four types of emulsifiers having different HLB (Hydrophile-Lipophile Balance) values, and are an optimal combination derived through experiments by the inventor of the present invention.

[0035] A cosmetic composition according to the present invention comprises three or more emulsifiers selected from the group consisting of sodium stearoyl glutamate, polyglyceryl-3 methyl glucose distearate, glyceryl stearate, and sorbitan monostearate.

[0036] The cosmetic composition according to the present invention comprises at least three kinds of emulsifiers selected from the group consisting of sodium stearoyl glutamate, polyglyceryl-3 methyl glucose distearate, glyceryl stearate, and sorbitan monostearate, thereby having an excellent effect of preventing layer separation even when containing a high salt content and uniformly and stably distributing particle sizes.

[0037] In an embodiment, three or more types of emulsifiers may be included in an amount of 1.5 to 5 wt%, specifically 1.5 to 3 wt%, based on the total weight of the cosmetic composition. Optimal effects may be achieved when included in this range.

[0038] In an embodiment, sodium stearoyl glutamate may be included in an amount of 0.05 to 1 wt% based on the total weight of the cosmetic composition. When sodium stearoyl glutamate is included in an amount of less than 0.05 wt% or more than 1 wt% based on the total weight of the cosmetic composition, layer separation may occur, particle size may become uneven, or discoloration or odor may occur.

[0039] In an embodiment, polyglyceryl-3 methyl glucose distearate may be included in an amount of 0.1 to 3 wt% based on the total weight of the cosmetic composition. When polyglyceryl-3 methyl glucose distearate is included in an amount of less than 0.1 wt% or more than 3 wt% based on the total weight of the cosmetic composition, layer separation may occur, particle size may become uneven, or discoloration or odor may occur.

[0040] In an embodiment, glyceryl stearate may be included in an amount of 0.05 to 1 wt% based on the total weight of the cosmetic composition. When glyceryl stearate is included in an amount of less than 0.05 wt% or more than 1 wt% based on the total weight of the cosmetic composition, layer separation may occur, particle size may become uneven, or discoloration or odor may occur.

[0041] In an embodiment, sorbitan monostearate may be included in an amount of 0.05 to 1 wt% based on the total weight of the cosmetic composition. When sorbitan monostearate is included in an amount of less than 0.05 wt% or more than 1 wt% based on the total weight of the cosmetic composition, layer separation may occur, particle size may become uneven, or discoloration or odor may occur.

[0042] In an embodiment, the oil may be included in an amount of 1 to 10 wt% based on the total weight of the cosmetic composition. The oil may improve the feel and spreadability of the composition. The type of oil is not particularly limited, and conventional oils used in cosmetic compositions, including polar oils and non-polar oils, may be used. For example, hydrocarbon oils such as squalane, mineral oil, hydrogenated polydecene, hydrogenated polyisobutene, C12-15 alkyl benzoate, hydrogenated poly(C6-12 olefin), hydrogenated poly(C6-14 olefin), and hydrogenated poly(C6-20 olefin); Esters of caprylic / capric triglyceride, neopentyl glycol dicaprate, 2-octyldodecyl myristate, isopropyl myristate, isopropyl palmitate, isocetyl ethylhexanoate, pentaerythrityl tetraethylhexanoate, butylene glycol dicaprylate / caprate, hexyl laurate, diisostearyl malate, cetyl 2-ethylhexanoate, octyldodecanol, glyceryl triethylhexanoate, ethylhexyl stearate; vegetable oils such as olive oil, avocado oil, jojoba oil, macadamia oil, grapeseed oil, rice bran oil, hydrogenated coconut oil, hydrogenated canola oil, hydrogenated palm oil; animal oils such as lanolin; And one or more oils selected from the group consisting of silicone oils such as dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, methyltrimethicone, diphenylsiloxyphenyltrimethicone, caprylylmethicone, phenyltrimethicone, cyclomethicone, and dimethicone may be used.

[0043] In the present invention, the cosmetic composition may be an emulsified formulation, specifically an oil-in-water (O / W) or water-in-oil (W / O) formulation, and more specifically an oil-in-water formulation. However, the present invention is not limited thereto, and the cosmetic composition may be prepared in any formulation commonly prepared in the technical field to which the present invention pertains. For example, the cosmetic composition may be formulated in the form of a solubilized formulation, an aqueous dispersion formulation dispersed in water, an emulsion formulation of the water-in-oil-in-water (W / O / W) and oil-in-water-in-oil (O / W / O) type, etc. However, the present invention is not limited thereto, and the composition may also be provided in various formulations such as a solution, suspension, emulsion, solid, gel, oil, powder, paste or foam aerosol, mist, etc.

[0044]

[0045] In embodiments, the cosmetic composition may additionally include a moisturizer, a preservative, or a functional ingredient.

[0046] The above moisturizer is intended to provide moisture to the skin or maintain moisture in the skin and provide a lasting moisturizing feeling, and is preferably a water-soluble ingredient. Examples of moisturizers that can be used include, but are not limited to, glycerin, butylene glycol, propylene glycol, dipropylene glycol, methylpropanediol, pentylene glycol, glycereth-26, propanediol, sorbitol, and diglycerin.

[0047] The above preservative is used to increase the preservation effect, and examples thereof include, but are not limited to, 1,2-hexanediol.

[0048] The above functional ingredients may be added by mixing various ingredients depending on the purpose of the cosmetic composition, and include, for example, wrinkle improvement agents, UV protection ingredients, whitening functional ingredients, pigmentation reduction functional ingredients, skin soothing functional ingredients, and sebum or pore management functional ingredients.

[0049] The cosmetic composition according to the present invention may additionally include ingredients included in general cosmetic compositions, and may include, for example, ion sequestering agents, bactericidal agents, pH regulators, antioxidants, alcohols, plant extracts, fragrances, cooling agents, thickeners, etc.

[0050] The cosmetic composition according to the present invention typically contains water in addition to the aforementioned ingredients. Purified water, such as ion-exchanged water or distilled water, is preferably used as the water. The content is not particularly limited, and any amount sufficient to sufficiently dissolve or disperse each ingredient contained in the composition may be used.

[0051] The mixing amount of the above-described components 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.

[0052] In addition, according to an embodiment of the present invention, an aqueous cosmetic comprising a cosmetic composition according to the present invention is provided. The cosmetic may be formulated as, for example, a flexible toner, a nourishing toner, an essence, a spray type, a mist, a gel, a lotion, a cream, etc., but is not limited thereto.

[0053]

[0054] Hereinafter, examples and experimental examples are presented to explain the present invention more specifically, but the present invention is not limited thereto.

[0055]

[0056] Experimental Example 1. Comparative experiment on composition stability according to emulsifier

[0057] Previously developed cosmetic compositions have been plagued by issues such as uneven particle size and layer separation, which significantly reduce stability when containing high salt content. To address these issues, the inventors of the present invention blended three or more emulsifiers with different HLB values ​​to produce an oil-in-water cosmetic composition.

[0058]

[0059] (1) Manufacture of Examples 1 to 5

[0060] Specifically, the components listed in Table 1 below were mixed to prepare the compositions of the examples. The unit of the component contents in Table 1 is weight%. Example 1 is a composition containing all four types of emulsifiers, and Examples 2 to 5 are compositions containing three types of emulsifiers.

[0061]

[0062]

[0063] The specific manufacturing method is as follows.

[0064] The emulsifier and oil-containing oil phase of Table 1 were added to the water phase containing the moisturizer, preservative, and thickener, and emulsification was performed at a high temperature of 80°C using a homomixer at a speed of 6000 rpm for 5 minutes. Subsequently, cooling was performed to 45°C, and the active phase containing the salt was added, and secondary emulsification was performed using a homomixer at 6000 rpm for 5 minutes.

[0065]

[0066] (2) Manufacture of Comparative Examples 1 to 10

[0067] Comparative Examples 1 to 10 of the composition according to the present invention were prepared by mixing the components described in Tables 2 and 3 below. The specific preparation method is the same as Example 1, and the unit of the component contents in Tables 2 and 3 is weight%.

[0068] Comparative Examples 1 to 4 are compositions containing only one emulsifier, and Comparative Examples 5 to 10 are compositions containing two types of emulsifiers. The aqueous components are the same as in the examples.

[0069]

[0070]

[0071]

[0072] (3) Verification of the stability of the composition

[0073] The stability of the cosmetic compositions of Examples and Comparative Examples was confirmed by testing the layer separation phenomenon, discoloration / odor change, and potency. Specifically, first, the occurrence of layer separation phenomenon at room temperature was tested, and for Examples and Comparative Examples in which the layers did not separate at room temperature, high-temperature stability and discoloration / odor change tests were conducted.

[0074]

[0075]

[0076] As shown in Table 4, the compositions of Examples 1 to 5 containing three or more emulsifiers according to the present invention did not exhibit layer separation, did not exhibit discoloration or odor change, and maintained their potency, confirming that the stability of the compositions was very excellent. In addition, Examples 1, 4, and 5 had uniform particle sizes, and in particular, the composition of Example 1 containing all four emulsifiers was confirmed to be stable even at high temperatures and to have excellent preservative stability. Representative particle photographs of Example 1 are disclosed in Fig. 1. As shown in Fig. 1, when the cosmetic composition of Example 1 was stored at 5°C to 50°C for 1 day to 2 months, it was confirmed under a microscope that the particle size was uniform and the physical properties were very stable without any change despite temperature changes and the passage of time.

[0077] Therefore, through this experiment, it was confirmed that when three or more types of emulsifiers according to the present invention are included, a cosmetic composition having excellent stability even when containing a high salt content can be prepared, and when all four types of emulsifiers are included, a cosmetic composition having even improved stability can be prepared.

[0078]

[0079] Meanwhile, the compositions of Comparative Examples 1 to 10 were examined for layer separation, high-temperature stability, and discoloration / odor change, and the results are shown in Table 5. In addition, representative particle photographs of Comparative Examples 5, 8, and 9 are disclosed in FIGS. 2 to 4.

[0080]

[0081]

[0082] As shown in Table 5, it was confirmed that layer separation occurred in all of Comparative Examples 1 to 4, Comparative Examples 6, 7, and 10, which contained only one type of emulsifier. In Comparative Examples 5, 8, and 9, layer separation did not occur, but it was confirmed that high-temperature stability was poor, and discoloration and odor occurred. Specifically, as shown in Fig. 2, Comparative Example 5 had larger particles from the same day compared to Example 1, and when stored at 40°C for more than one month, the particles became larger and uneven. In Comparative Example 8, as shown in Fig. 3, the particles were larger from the same day compared to Example 1, and when stored at 40°C for more than two weeks, the particles became larger and uneven. In Comparative Example 9, as shown in Fig. 4, the particle size on the same day was similar to that of Example 1, but when stored at 40 and 50°C for more than two weeks, the particles became very large and uneven, and the physical properties deteriorated.

[0083] Therefore, this experiment confirmed that high stability can be maintained even when containing a high salt content (10% or more) only when at least three types of emulsifiers are included.

[0084]

[0085] Experimental Example 2. Comparative experiment on composition stability according to emulsifier content

[0086]

[0087] (1) Manufacture of Example 6 and Comparative Examples 11 to 12

[0088] Example 6 and Comparative Examples 11 to 12 of the composition according to the present invention were prepared by mixing the components described in Table 6 below. The specific preparation method is the same as Example 1, and the unit of the content of the components in Table 6 is weight%.

[0089] Example 6 has a slightly lower content of polyglyceryl-3 methyl glucose distearate compared to Example 1, Comparative Example 11 has an increased content of polyglyceryl-3 methyl glucose distearate to 5 wt%, and Comparative Example 12 has a significantly lower content of polyglyceryl-3 methyl glucose distearate to 0.01 wt%.

[0090]

[0091]

[0092] (2) Verification of stability of the composition

[0093] The layer separation and high-temperature stability of Example 6 and Comparative Examples 11 to 12 were confirmed, and the results are shown in Table 7.

[0094]

[0095]

[0096] As shown in Table 7, Example 6, which included all four types of emulsifiers and had a polyglyceryl-3 methyl glucose distearate content of 0.5 wt%, was confirmed to exhibit no layer separation and a uniform particle size. In contrast, Comparative Example 11, which included all four types of emulsifiers but had a polyglyceryl-3 methyl glucose distearate content of 5 wt%, which is higher than that of Example 1, did not exhibit layer separation, but as shown in Fig. 5, compared to Example 1, the particles were large and uneven from the same day, and when stored at 40 and 50°C for more than two weeks, the particles became very large and uneven. In addition, discoloration and odor occurred. In the case of Comparative Example 12, in which the content of polyglyceryl-3 methyl glucose distearate was 0.01 wt%, which is much lower than that of the example, the layers were separated, and as shown in Fig. 6, the particle size was found to be non-uniform when stored at 5°C to 50°C for 1 day to 2 months compared to Example 1. Therefore, through this experiment, it was confirmed that the appropriate content of polyglyceryl-3 methyl glucose distearate is 0.1 to 3 wt%.

[0097] In addition, experiments were conducted by changing the weight % of sodium stearoyl glutamate, glyceryl stearate, and sorbitan monostearate using the same method, and it was confirmed that the appropriate content was 0.05 to 1 weight %.

[0098] Through the above experimental results, it was confirmed that by mixing three or more types of emulsifiers with different HLB values ​​in an appropriate weight %, it is possible to manufacture an emulsified cosmetic composition that has uniform particles without a decrease in viscosity or particle coalescence even when various types of salts are included in a high content in the composition, and that is stably maintained without layering phenomenon even over a wide range of temperatures and long-term storage.

[0099]

[0100] While specific aspects of the present invention have been described in detail above, it will be apparent to those skilled in the art that these specific descriptions merely represent preferred embodiments and are not intended to limit the scope of the present invention. Therefore, the substantial scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. As an emulsified cosmetic composition, An emulsifying cosmetic composition comprising three or more emulsifiers selected from the group consisting of sodium stearoyl glutamate, polyglyceryl-3 methyl glucose distearate, glyceryl stearate, and sorbitan monostearate, and containing a salt.

2. In paragraph 1, An emulsified cosmetic composition, wherein the salt is contained in an amount of 0.1 to 15 wt% based on the total weight of the cosmetic composition.

3. In paragraph 2, An emulsified cosmetic composition, wherein the salt is contained in a high content of 5 to 10 wt% based on the total weight of the cosmetic composition.

4. In paragraph 1, An emulsified cosmetic composition, wherein the sodium stearoyl glutamate is contained in an amount of 0.05 to 1 wt% based on the total weight of the cosmetic composition.

5. In paragraph 1, An emulsified cosmetic composition, wherein the polyglyceryl-3 methyl glucose distearate is contained in an amount of 0.1 to 3 wt% based on the total weight of the cosmetic composition.

6. In paragraph 1, An emulsified cosmetic composition, wherein the glyceryl stearate is contained in an amount of 0.05 to 1 wt% based on the total weight of the cosmetic composition.

7. In paragraph 1, An emulsified cosmetic composition, wherein the above sorbitan monostearate is contained in an amount of 0.05 to 1 wt% based on the total weight of the cosmetic composition.

8. In paragraph 1, An emulsified cosmetic composition, wherein three or more emulsifiers selected from the group consisting of sodium stearoyl glutamate, polyglyceryl-3 methyl glucose distearate, glyceryl stearate, and sorbitan monostearate are included in an amount of 1.5 to 5 wt% based on the total weight of the cosmetic composition.

9. In paragraph 1, An emulsified cosmetic composition comprising 1 to 10 wt% of oil based on the total weight of the cosmetic composition.

10. In paragraph 1, The above cosmetic composition is an emulsified cosmetic composition that additionally contains a moisturizer, a preservative or a functional ingredient.

11. In paragraph 1, The above cosmetic composition is an emulsified cosmetic composition, which is an oil-in-water or water-in-oil type.

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