Liquid crystal cosmetic composition having excellent electrical conductivity and capable of forming minute currents

Abstract

To provide a liquid crystal cosmetic composition with excellent electrical conductivity for forming a microcurrent.SOLUTION: A liquid crystal cosmetic composition increasing electrical conductivity, forming a voltage, acting as a chemical battery and forming a microcurrent by an appropriate combination of a liquid crystal emulsion with an electrolyte is provided thereby capable of exhibiting an excellent effect of increasing absorption on the skin through the ionization of active ingredients, an excellent effect of the microcurrent itself enhancing the skin elasticity and strengthening the skin barrier, and the like.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a liquid crystal cosmetic composition having excellent electrical conductivity and capable of forming a microcurrent, and more particularly, to a liquid crystal cosmetic composition having excellent electrical conductivity and capable of forming a voltage by combining a liquid crystal emulsion with an electrolyte, thereby generating a microcurrent. [Background technology]

[0002] In recent years, it has been reported through long-term research that microcurrents have beneficial functions such as wound healing, cell activation, skin tone improvement, and skin elasticity. Therefore, the market for beauty devices utilizing microcurrents has been growing for several years, but these have drawbacks such as high prices and inconvenience in use and portability. Therefore, it is necessary to develop a cosmetic product with a formulation that can generate microcurrents without the use of a beauty device.

[0003] So, in a technology developed recently, the concept of piezoelectricity (the phenomenon whereby a minute current or voltage is generated by polarization when force is applied) based on the way consumers use cosmetics by tapping or rubbing the skin after applying it to the skin, was applied to cosmetics. In other words, a minute current generation method was devised in which a minute current is generated when pressure is applied during application.

[0004] However, there is a need to develop new technology that can generate microcurrents without applying such direct pressure, effectively deliver active ingredients to the skin layers, increase absorption, and provide beneficial skin functionality through microcurrents (such as increased elasticity and strengthened skin barrier).

[0005] Patent Document 1 relates to a cosmetic composition having piezoelectric properties, and more specifically, describes a cosmetic composition having piezoelectric properties that contains an emulsifier, a polymer powder, an emulsion stabilizer, a piezoelectric polymer, and water, and that can effectively deliver a water-soluble active ingredient to the skin without the aid of a beauty device. Patent Document 2 relates to a piezoelectric cosmetic composition, and more specifically, describes a piezoelectric cosmetic composition that contains as an active ingredient a piezoelectric material that generates a microcurrent when pressure is applied. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Republic of Korea Patent No. 10-2041748 [Patent Document 2] Republic of Korea Patent No. 10-1819467 Summary of the Invention [Problem to be solved by the invention]

[0007] Although there is a high need to apply microcurrent to cosmetic compositions because it can provide beneficial functionality to the skin, existing devices are expensive and inconvenient to use and carry, so their application is limited. Therefore, the present invention aims to provide a liquid crystal cosmetic composition that can increase electrical conductivity by appropriately combining a liquid crystal emulsion with an electrolyte, form a voltage, act as a chemical battery, form a microcurrent, and provide effects such as increased skin absorption, improved skin elasticity, and strengthened skin barrier. [Means for solving the problem]

[0008] The present invention includes a step (a) of adding a thickener to an aqueous phase and dispersing the thickener therein; a step (b) of adding a well-dissolved oil phase to the aqueous phase of step (a) and emulsifying the oil phase; and a step (c) of forming liquid crystal particles by cooling the aqueous phase of step (b). The aqueous phase includes purified water, glycerin, hydrogenated lecithin, cetearyl olivate, sodium citrate, citric acid, and betaine. The thickener includes diutan gum and xanthan gum. The oil phase includes shea butter, cetearyl alcohol, stearic acid, phenylmethyl trimethicone, caprylic and capric triglycerides. The present invention provides a method for producing a liquid crystal cosmetic composition comprising polyglyceryl-6 triglyceride and polyglyceryl-6 stearate.

[0009] On the other hand, in the manufacturing method of the present invention, the liquid crystal cosmetic composition is preferably one that generates a minute electric current.

[0010] On the other hand, in the production method of the present invention, it is preferable that the aqueous phase further contains a preservative.

[0011] On the other hand, in the production method of the present invention, the diutan gum is preferably derived from a culture solution or an extract thereof of a Sphingomonas sp. strain containing diutan gum.

[0012] The present invention also provides a liquid crystal cosmetic composition produced by the above-mentioned production method. Effect of the Invention

[0013] The present invention provides a liquid crystal cosmetic composition that increases electrical conductivity, generates voltage, acts as a chemical battery, and generates microcurrents through an appropriate combination of a liquid crystal emulsion and an electrolyte, thereby exhibiting excellent effects such as increased skin absorption through ionization of active substances, increased skin elasticity due to the microcurrent itself, and strengthened skin barrier. [Brief description of the drawings]

[0014] [Figure 1] 1 is a photograph of the liquid crystal cosmetic composition of the present invention observed under a microscope. [Diagram 2] FIG. 2 is a diagram showing a measuring device used for measuring the electric current and the microcurrent of the liquid crystal cosmetic composition of the present invention. [Diagram 3] FIG. 2 is a diagram showing the results of measuring the electrical conductivity of the liquid crystal cosmetic composition of the present invention. [Figure 4] FIG. 2 is a diagram showing the results of measuring the electrical conductivity of the skin after applying the liquid crystal cosmetic composition of the present invention to the skin. [Diagram 5] 1 is a luminescence photograph showing the results of comparing the liquid crystal cosmetic composition of the present invention applied to a light-emitting diode with a cosmetic composition of another company. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] There is a high need to apply microcurrents to cosmetic compositions because they can exert beneficial functions on the skin, but existing devices have limited application because they are expensive and inconvenient to use and carry.In response to this, a concept of piezoelectricity (a phenomenon in which microcurrents or voltages are generated by polarization when force is applied) has been applied to cosmetics based on the usage method in which consumers apply cosmetics to the skin and then tap or rub the skin while applying pressure, and a microcurrent generation method has been devised in which a microcurrent is generated when pressure is applied during application.

[0016] However, in the present invention, as a result of our earnest efforts to devise a cosmetic composition that can effectively generate microcurrents without applying such direct pressure, we have developed a technology that can generate microcurrents within the formulation itself without applying pressure or coating to the skin by appropriately combining a liquid crystal emulsion and an electrolyte, increasing electrical conductivity through their fluidity and mutual complementarity, generating voltage, and acting as a chemical battery.

[0017] Therefore, the present invention provides a method for producing a liquid crystal cosmetic composition, comprising: (a) a step of adding a thickener to an aqueous phase and dispersing the thickener; (b) a step of adding a well-dissolved oil phase to the aqueous phase of (a) and emulsifying the oil phase after (a); and (c) a step of forming liquid crystal particles by cooling after (b); wherein the aqueous phase comprises purified water, glycerin, hydrogenated lecithin, cetearyl olivate, sodium citrate, citric acid, and betaine, the thickener comprises diutan gum and xanthan gum, and the oil phase comprises shea butter, cetearyl alcohol, stearic acid, phenylmethyltrimethicone, caprylic / capric triglyceride, and polyglyceryl-6 stearate.

[0018] The liquid crystal cosmetic composition prepared by the above-mentioned manufacturing method has excellent electrical conductivity and can effectively form microcurrents, and as a galvanic effect, can exert effects such as increased skin absorption through ionization of active substances in the cosmetic composition, increased skin elasticity due to the microcurrent itself, and strengthening of the skin barrier.

[0019] Hereinafter, the method for producing the liquid crystal cosmetic composition of the present invention will be described in detail by each step.

[0020] <Step (a): Adding and dispersing a thickener in an aqueous phase>

[0021] This step involves adding and dispersing a thickener in an aqueous phase, and the aqueous phase is composed of purified water, glycerin, hydrogenated lecithin, cetearyl olivate, sodium citrate, citric acid, and betaine.

[0022] Meanwhile, in this step, it is preferable to heat the aqueous phase to 60° C. to 80° C., add and disperse a thickener, and then heat to 70° C. to 90° C. At this time, if the temperature is lower than the above range, it may affect the solubility of the oil phase or negatively affect the formation of particle size, while if the temperature is higher than the above range, it may negatively affect the formation of emulsion due to high evaporation amount.

[0023] Hydrogenated lecithin is a component obtained by adding hydrogen to lecithin derived from beans, eggs, etc., which becomes unstable when exposed to oxygen, so hydrogen is added to it. It is known to be used as a surfactant (emulsifier), suspending agent (non-surfactant), skin conditioning agent, etc., and can exert moisturizing and elasticity effects and restore the skin. In the present invention, it is used as one of the core components for forming a liquid crystal emulsion.

[0024] Olive oil fatty acid cetearyl is a synthetic ester component in the form of cetearyl alcohol and fatty acid derived from olive oil combined, and is mainly in the form of liquid at room temperature. It is used as a vegetable emulsifier component to replace PEG-based emulsifiers and PPG-based emulsifiers, and can be used as an ingredient having various effects such as moisturizing, restoring the skin barrier, and soothing the skin. In the present invention, it is used as one of the core ingredients for forming a liquid crystal emulsion.

[0025] Meanwhile, in the present invention, microcurrent is formed within the dosage form itself by combining the liquid crystal emulsion with an electrolyte, and for this purpose, sodium citrate, citric acid, and betaine are used as the electrolyte. At this time, the liquid crystal emulsion is arranged in the form of multiple layers, and each component of the electrolyte is arranged between these structures, increasing the electrical conductivity and forming microcurrent.

[0026] Sodium citrate is a sodium salt of citric acid, and is in the form of a salty white powder. It is used as a sequestering agent to prevent spoilage or deterioration of cosmetics, and as a pH acidity regulator to adjust the acidity of cosmetics, preserve color, and prevent oxidation. In the present invention, it is used as one of the electrolytes.

[0027] Citric acid is a type of organic acid, also known as fruit acid, and is a natural ingredient extracted from the sourness of fruits. It is used as a sequestering agent to prevent spoilage or deterioration of cosmetics, a fragrance, and a pH regulator to prevent rancidity. In the present invention, it is used as one of the electrolytes.

[0028] Betaine is an amino acid component extracted from sugar beets, beets, wolfberries, etc., and is used as a moisturizer, hair conditioning agent, food additive, antioxidant, etc. It has the effect of preventing dry skin by controlling oil and moisture, anti-inflammatory effect, and irritation reduction effect of cosmetic raw materials, etc. In the present invention, it is used as one of the electrolytes.

[0029] Meanwhile, the electrolyte preferably contains 0.04 to 0.06 parts by weight of sodium citrate, 0.04 to 0.06 parts by weight of citric acid, and 1 to 3 parts by weight of betaine, whereby the electrolyte and the liquid crystal emulsion stably complement each other and smoothly perform their role as a chemical battery.

[0030] Meanwhile, in the preparation method of the present invention, the aqueous phase preferably further contains a preservative. The preservative is not limited to any preservative known in the art.

[0031] Meanwhile, in this step, the thickener is not limited to any one known in the art, but includes, for example, natural substances such as casein, alginic acid, xanthan gum, etc., semi-synthetic substances such as carboxymethylcellulose, methylcellulose, etc., synthetic polymers such as carboxyvinyl polymer, polyacrylates, etc., and preferably includes at least one selected from diutan gum and xanthan gum. In this case, the diutan gum may be derived from a culture solution or an extract thereof of a Sphingomonas sp. strain containing diutan gum, and when a Sphingomonas sp. strain containing diutan gum is cultured, a large amount of diutan gum is secreted on the culture solution, so the culture solution or an extract thereof is purified and used. More preferably, the thickener includes 0.1 to 0.3 parts by weight of diutan gum and 0.02 to 0.06 parts by weight of xanthan gum.

[0032] <Step (b): Adding the well-dissolved oil phase to the aqueous phase of step (a) to emulsify>

[0033] This step involves emulsifying a well-dissolved oil phase into the aqueous phase of step (a), the oil phase comprising shea butter, cetearyl alcohol, stearic acid, phenylmethyltrimethicone, caprylic / capric triglyceride, and polyglyceryl-6 stearate.

[0034] Meanwhile, in this step, the oil phase is heated to 70°C to 90°C to dissolve it well, and then added to the aqueous phase of step (a) to perform emulsification. Through this, the oil phase and the aqueous phase are successfully emulsified. If the temperature is lower than this range, there is a risk that the oil phase will not dissolve, while if the temperature is higher than this range, problems may occur due to rancidity of fatty acids.

[0035] Meanwhile, in the present invention, any fatty acid and emulsifier known in the art can be used to form a liquid crystal emulsion, but preferably, the liquid crystal emulsion can be successfully formed by emulsifying the hydrogenated lecithin and cetearyl oleate in the water phase with the cetearyl alcohol and stearic acid in the oil phase. Each surfactant, such as hydrogenated lecithin, cetearyl oleate, and stearic acid, and cetearyl alcohol can form emulsion particles as multiple layers, and a liquid crystal emulsion can be stably formed. At this time, each surfactant forms a double layer during emulsification, and each of the double layers itself is granulated to form a multi-layer liquid crystal emulsion. In addition, cetearyl alcohol is in a solid form at room temperature and can stably maintain its form when cooled, so that a liquid crystal emulsion can be successfully formed. The liquid crystal emulsion preferably contains 0.4 to 0.6 parts by weight of hydrogenated lecithin, 1 to 2 parts by weight of cetearyl olivate, 1 to 3 parts by weight of cetearyl alcohol, and 1 to 3 parts by weight of stearic acid.

[0036] Cetearyl alcohol is a mixture of fatty alcohols composed of cetyl and stearyl alcohols, and is widely used as an emulsion stabilizer, opacifier, surfactant-foaming agent, and thickener. It has moisturizing properties while improving the application of cosmetics, and can be used as a material for many cosmetics. In the present invention, it is used as one of the core components for forming a liquid crystal emulsion.

[0037] Stearic acid is a mixture of higher saturated fatty acids made from natural fatty acids and is also called octadecanoic acid. It is used as a fragrance, surfactant, detergent, and emulsifier, and is used to stabilize different components that do not mix with each other when adsorbed to the interface of each substance, thereby providing cleaning power. It also has excellent skin stability and has the effect of preventing moisture evaporation and dryness by forming an oil film on the skin. In the present invention, it is used as one of the core components for forming a liquid crystal emulsion.

[0038] <Step (c): Forming Liquid Crystal Particles by Cooling>

[0039] This step is a step of forming liquid crystal particles by cooling after emulsification in step (b).

[0040] Meanwhile, in this step, after emulsification, it is preferable to form liquid crystal particles by cooling the emulsion to 30° C. to 50° C. In this case, if the emulsion is cooled beyond the range, the particles are not sufficiently cooled, which may cause a problem that the particles are likely to be deformed.

[0041] Thus, the present invention has completed a liquid crystal cosmetic composition prepared by the above-mentioned preparation method (Fig. 1). This can increase electrical conductivity by appropriately combining liquid crystal emulsion and electrolyte, generate voltage, act as a chemical battery, generate microcurrent, and exert effects such as increased skin absorption, improved skin elasticity, and strengthened skin barrier.

[0042] Meanwhile, in the liquid crystal cosmetic composition of the present invention, the cosmetic composition may be used for one or more applications selected from the group consisting of increasing skin absorption, enhancing skin elasticity, and strengthening skin barrier. In addition, by forming microcurrent, it can exhibit excellent effects such as increasing skin absorption through ionization of active substances, enhancing skin elasticity of the microcurrent itself, and strengthening skin barrier.

[0043] Meanwhile, in the present invention, the cosmetic composition may be, for example, any one selected from the group consisting of a solution, a suspension, an emulsion, a paste, a lotion, a gel, a water-soluble liquid, a cream, an essence, a surfactant-containing cleanser, an oil, an oil-in-water (O / W) type and a water-in-oil (W / O) type emulsion, a lotion, an eye cream, a soothing gel, and an ointment; a mask pack type; a body wash type; a peeling gel; any one color makeup cosmetic type selected from the group consisting of an oil-in-water type and a water-in-oil type makeup base, a foundation, a skin cover, a lipstick, a lip gloss, a face powder, a two-way cake, an eye shadow, a cheek color, and an eyebrow pencil; and a scalp type; and is preferably one or more types selected from the group consisting of a transparent skin toner, a transparent essence, a low-viscosity emulsion-type lotion essence, and a high-viscosity emulsion-type cream.

[0044] The cosmetic composition of the present invention may also contain adjuvants commonly used in the cosmetic field, such as hydrophilic or lipophilic active agents, preservatives, antioxidants, solvents, fragrances, fillers, barrier agents, pigments, absorbents, dyes, etc. The amounts of these various adjuvants are those commonly used in the field, and in each case the adjuvants and their ratios may be selected so as not to adversely affect the favorable properties of the cosmetic composition of the present invention.

[0045] In addition, the cosmetic composition of the present invention can be used in combination with other cosmetic compositions other than those of the present invention. In addition, the cosmetic composition of the present invention can be used in a normal manner, and the number of times of use can be varied depending on the skin condition or preference of the user.

[0046] Meanwhile, according to the following experiment, it was confirmed that the liquid crystal cosmetic composition prepared by mixing the liquid crystal emulsion of the present invention with an electrolyte has excellent current and voltage formation, electrical conductivity, and light emission, and was also excellent when applied to the skin. Through this, the liquid crystal cosmetic composition of the present invention is judged to be applicable as a variety of cosmetic materials since it can exert effects such as increasing skin absorption through ionization of active substances in the cosmetic composition as a galvanic effect by forming a microcurrent, and increasing skin elasticity and strengthening the skin barrier due to the microcurrent itself.

[0047] The present invention will now be described in more detail with reference to the following examples and experimental examples. However, the scope of the present invention is not limited to the following examples and experimental examples, and includes modifications of the technical ideas equivalent thereto.

[0048] [Examples and Comparative Examples: Preparation of the Microcurrent-Forming Liquid Crystal Cosmetic Composition of the Present Invention]

[0049] In this example, a liquid crystal cosmetic composition that generates a microcurrent was prepared. For comparison, a cosmetic composition without the addition of electrolyte was prepared. The detailed composition is shown in Table 1 below. A liquid crystal emulsion was formed using hydrogenated lecithin, cetearyl olivate, cetearyl alcohol, and stearic acid, and sodium citrate, citric acid, and betaine were added as electrolytes.

[0050] The process for producing the liquid crystal cosmetic composition of the present invention is as follows. First, the aqueous phase (components 1 to 8 in Table 1) was heated to 70°C, and the thickener (components 9 to 10 in Table 1) was thoroughly dispersed and then heated to 80°C. The oil phase (components 11 to 16 in Table 1) was heated to 80°C and thoroughly dissolved, and then emulsified while being added to the aqueous phase. Then, the mixture was gradually cooled to 40°C to successfully form liquid crystal particles. The liquid crystal cosmetic composition thus completed was observed under a microscope as shown in FIG. 1, and the following experiment was carried out to confirm whether microcurrent was successfully formed.

[0051] [Table 1] *: The diutan gum used was derived from the culture medium of a Sphingomonas sp. strain that contains diutan gum.

[0052] [Experimental Example 1: Measurement of voltage, microcurrent, electrical conductivity and light emission level of the liquid crystal cosmetic composition of the present invention]

[0053] In this experimental example, the voltage, microcurrent and electrical conductivity of the liquid crystal cosmetic composition of the above example were measured, and the liquid crystal cosmetic composition was applied to a light emitting diode to confirm its light emission.

[0054] First, the voltage and microcurrent were measured using the measuring tool shown in Figure 2. As a result, as shown in Table 2, it was confirmed that the liquid crystal cosmetic composition made by combining the liquid crystal emulsion of the present invention with an electrolyte had a much higher current and voltage generation than the comparative example. This was also found to be a superior effect to the galvanic cream (generating microcurrent) of other companies.

[0055] [Table 2]

[0056] Then, the electrical conductivity of the liquid crystal cosmetic composition of the present invention was measured, and it was confirmed that the composition exhibited far superior electrical conductivity to the control group (a galvanic cream made by another company) and distilled water, and that microcurrents were successfully formed, as shown in Figure 3. Furthermore, when the composition was applied to the skin and the electrical conductivity of the skin was measured, it was also confirmed that the composition exhibited superior electrical conductivity to the control group (a galvanic cream made by another company) and distilled water, and that microcurrents were successfully formed, as shown in Figure 4.

[0057] Meanwhile, after applying the liquid crystal cosmetic composition of the present invention to a light-emitting diode, the degree of light emission was checked. As a result, it was confirmed that the degree of light emission was superior to that of the control group (a galvanic cream of another company), as shown in FIG.

[0058] In summary, it has been confirmed that the liquid crystal cosmetic composition of the present invention has excellent current and voltage formation, electrical conductivity, and light emission. Through this, it is believed that when actually applied to the skin, it can effectively form microcurrents on the skin, and as a galvanic effect, it can exert effects such as increased skin absorption through ionization of the active ingredients in the cosmetic composition, increased skin elasticity due to the microcurrent itself, and strengthening the skin barrier.

Claims

Step (a): adding a thickening agent to an aqueous phase heated to 60°C to 80°C, dispersing it, and then heating to 70°C to 90°C; After step (a), step (b): adding an oil phase heated to 70°C to 90°C and well dissolved to the aqueous phase of step (a) and emulsifying; and After step (b), step (c): forming liquid crystal particles by cooling to 30°C to 50°C; The method for producing a liquid crystal cosmetic composition is characterized by comprising: The aqueous phase is composed of purified water, glycerin, hydrogenated lecithin, cetearyl olive oil fatty acid, sodium citrate, citric acid, and betaine; The thickening agent is composed of diutan gum and xanthan gum; The oil phase is composed of shea butter, cetearyl alcohol, stearic acid, phenylmethyltrimethicone, caprylic / capric triglyceride, and polyglyceryl-6 stearate. A method for producing a liquid crystal cosmetic composition is characterized in that it comprises:

2. The method for producing a liquid crystal cosmetic composition according to claim 1, wherein the liquid crystal cosmetic composition forms a microcurrent.

3. The method for producing a liquid crystal cosmetic composition according to claim 1, wherein the aqueous phase further contains a preservative.

4. The method for producing a liquid crystal cosmetic composition according to claim 1, wherein the diutan gum is derived from a culture solution of a Sphingomonas sp. strain containing diutan gum or an extract thereof.

5. A liquid crystal cosmetic composition characterized by being produced by the production method of claim 1.

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