WO2025013954A1 - Cosmetic composition, with enhanced stability, for improving skin elasticity - Google Patents

Abstract

The present invention relates to a cosmetic composition, with enhanced stability, for improving skin elasticity, the composition comprising ascorbic acid, hydrogenated lecithin, a Sophora flavescens root extract, an Oldenlandia diffusa extract, and a Centella asiatica extract as active ingredients. The cosmetic composition has effects of alleviating skin aging, loss of skin elasticity, reduction of collagen fibers or elastic fibers, wrinkle formation, skin dryness, and the like. With enhanced formulation stability, the composition allows the ingredients to be preserved as-is, thereby delivering excellent effects and enabling long-term storage.

Description

Cosmetic composition for improving skin elasticity with enhanced stability

The present invention relates to a cosmetic composition for improving skin elasticity with enhanced formulation stability.

The skin functions as a barrier to protect the body from external factors that disrupt the homeostasis of the human body, and can be easily damaged as it comes into contact with various external factors. Major stress factors include microbial proliferation, fine dust, pollutants, and ultraviolet rays, which generate reactive oxygen species, inducing damage or death of skin cells and causing skin aging. Accordingly, the demand for cosmetics with various functions to maintain healthy and beautiful skin is increasing, and in particular, the development of cosmetics to prevent and improve skin aging such as loss of skin elasticity, wrinkles, and dry skin that inevitably occur over time is required.

Meanwhile, ascorbic acid, also known as vitamin C, is the most powerful and broad-spectrum antioxidant among the antioxidant vitamins in cells, preventing oxygen from reacting with active oxygen, removing active oxygen, and repairing DNA damaged by active oxygen. In addition, ascorbic acid is widely used as a cosmetic material because it acts as a powerful biological antioxidant in the skin, blood, and tissue, helping to increase the body's immune function, promote collagen production, prevent wrinkles, and regenerate skin. However, ascorbic acid is very unstable, and it has the disadvantage of being easily oxidized by physical and chemical factors such as air, especially oxygen, heat, and light, and thus easily losing its activity. In other words, although vitamin C can be dissolved in large quantities in an aqueous solution due to its characteristics, it is reported that only a small amount can function as an active ingredient in medicines, foods, and cosmetics, as a sufficient amount of vitamin C is not stabilized due to rapid oxidation.

Accordingly, there is a demand for the development of a cosmetic composition that contains new materials and ascorbic acid that can improve skin aging, skin elasticity, etc., while maintaining stability even when stored for a long time and having improved effectiveness.

The present invention has been made to solve the above problems, and aims to provide a cosmetic composition for improving skin elasticity with enhanced formulation stability.

In order to achieve the above object, the present invention provides a cosmetic composition for improving skin elasticity with enhanced stability, comprising ascorbic acid, hydrogenated lecithin, a root extract of Angelica dahurica, a white chrysantha extract, and a centella asiatica extract as effective ingredients.

The above ascorbic acid includes Sodium Ascorbyl Phosphate, Magnesium Ascorbyl Phosphate, Ascorbyl Glucoside or Aminopropyl Ascorbyl Phosphate.

The above-mentioned extract of the root of the Korean ginseng, extract of the white ginseng, or extract of the purslane may be extracted with ethanol extract, water, alcohol having C ₁ to C ₄ , or a mixed solvent thereof, and the alcohol having C ₁ to C ₄ may be at least one selected from the group consisting of methanol, ethanol, propyl alcohol, butyl alcohol, glycerin, propylene glycol, and butylene glycol.

The composition may contain 0.1 to 15 wt% of ascorbic acid, 0.01 to 12 wt% of hydrogenated lecithin, 0.01 to 10 wt% of a root extract of Golconda grass, 0.01 to 10 wt% of a white chrysantha extract, and 0.01 to 10 wt% of a centella asiatica extract based on the total weight of the composition.

The above skin elasticity is characterized by at least one selected from the group consisting of skin aging, loss of skin elasticity, reduction of collagen fibers or elastic fibers, wrinkle formation, and skin dryness.

The above composition can be formulated as any one selected from the group consisting of toner, essence, serum, lotion, gel, paste, cream, powder, oil, pack, mist, soap, cleanser, makeup base and foundation.

In addition, in another aspect, the present invention provides a cosmetic for improving skin elasticity with enhanced stability comprising the cosmetic composition.

The cosmetic composition according to the present invention contains ascorbic acid, hydrogenated lecithin, a root extract of Angelica dahurica, a white chrysanthemum extract, and a centella asiatica extract as effective ingredients, thereby improving skin aging, loss of skin elasticity, reduction of collagen fibers or elastic fibers, wrinkle formation, skin dryness, etc., and since the formulation stability is improved, the ingredients are maintained as they are, thereby realizing excellent effects and enabling long-term preservation.

Figure 1 is a graph showing the results of measuring the amount of procollagen secretion according to one embodiment of the present invention.

Hereinafter, the present invention will be described in more detail.

All technical terms used in the present invention, unless otherwise defined, have the following definitions and are consistent with the meanings generally understood by those skilled in the art in the relevant field of the present invention. In addition, although preferred methods or samples are described in this specification, similar or equivalent ones are also included in the scope of the present invention.

Throughout this specification, unless the context otherwise requires, the words “comprise” and “comprising” will be understood to imply the inclusion of a stated step or component, or group of steps or components, but not the exclusion of any other step or component, or group of steps or components.

In this specification, “active ingredient” means an ingredient that exhibits the intended activity alone or can exhibit the intended activity together with a carrier or the like that is inactive on its own.

The present invention provides a cosmetic composition for improving skin elasticity with enhanced stability, comprising ascorbic acid, hydrogenated lecithin, an extract of the root of the common dandelion, an extract of Baekhwasa seolcho, and an extract of Centella asiatica as effective ingredients.

Ascorbic Acid includes, but is not limited to, Sodium Ascorbyl Phosphate, Magnesium Ascorbyl Phosphate, Ascorbyl Glucoside or Aminopropyl Ascorbyl Phosphate. Preferably, it may be Sodium Ascorbyl Phosphate.

When the above ascorbic acid is applied to the present invention, it prevents loss of elasticity due to skin aging by promoting collagen synthesis, prevents skin aging by inhibiting the action of active oxygen caused by ultraviolet rays, and brightens the skin by inhibiting melanin synthesis and reducing oxidized melanin. In addition, it can exhibit an antioxidant function more effectively.

Ascorbic acid is one of the water-soluble vitamins, also called vitamin C. Vitamin C helps the absorption of iron and is involved in biosynthesis and immune function. When deficient, it causes scurvy, tissue abnormalities, bone pain, diarrhea, etc., and it is known to act as a reducing agent and antioxidant in collagen synthesis. Ascorbic acid is found in large quantities in green tea, lemons, spinach, cabbage, etc. Most mammals can synthesize ascorbic acid from glucose, but humans cannot synthesize it in their bodies and must ingest it through food, etc. When used as a cosmetic ingredient, a strong antioxidant effect can be expected, and it has an excellent effect in preventing pigmentation, skin elasticity, and aging by positively affecting the proliferation of collagen fibroblasts.

Hydrogenated Lecithin is a phospholipid that is produced by hydrogenating lecithin, a skin recovery ingredient. It can be manufactured synthetically or derived from animals (egg yolk) or plants. Lecithin is an important component of biological membranes, but it is unstable when exposed to oxygen. Hydrogenated Lecithin has a higher melting point than lecithin, improved oxidation stability, and different polarity, so it is used as a dispersant, solubilizer, surfactant, micelle former, and liposome former to improve formulation stability and enhance the absorption of other skin care ingredients, allowing it to have greater efficacy on the skin. In addition, it helps form strong cell walls as a component that constitutes cells, helps the absorption of good ingredients and helps discharge waste products, and maintains moisture in the skin for a long time, making the skin soft and moist.

Caragana Sinica Root Extract is extracted from the root of Caragana sinica. Caragana sinica is a deciduous broadleaf shrub that grows or is cultivated in mountainous areas in central and southern regions. The root contains alkaloids, saponins, stigmasterol, brassicasterol, campesterol, cholesterol, sterols, glycosides, starch, etc. Caragana Sinica Root Extract has anti-melanin and antioxidant activities, and is known to be able to simultaneously inhibit melanin production, enzymes that regulate melanin production, and various proteins related to it.

Oldenlandia Diffusa Extract is extracted from the whole plant of Oldenlandia diffusa. Oldenlandia diffusa is an annual herb in the Rubiaceae family. It is called “Baekhwa” because of its white flowers and “Saseolcho” because of its leaves that resemble a snake’s tongue. In Korea, it grows on Mt. Halla in Jeju Island and in South Jeolla Province. Oldenlandia diffusa is known to be effective in improving wrinkles and preventing sagging skin (Yoshimura K et al., Aesthetic Plast Surg. 2008; 32(1):48-55, Hu S et al., Ann Plast Surg. 2007 Jun;58(6):602-7). The components contained in Baekhwasa Seolcho include Betulin, Betulinic acid, Ursolic acid, Oleanolic acid, Stigmasterol, β-Sitosterol, β-Glycyrretinic acid, ρ-Coumaric acid, Glucoside, and Hentriacontane, and are known to exhibit anticancer, anti-inflammatory, antiviral, and antioxidant effects.

Centella Asiatica Extract is extracted from the whole plant of Centella asiatica. Centella asiatica is a perennial plant of the Apiaceae family, and its main ingredients, asiaticoside and madecassoside, are effective in treating skin wounds and chronic ulcers, and help with collagen synthesis to help skin elasticity, prevent skin dryness, and help relieve skin irritation, soothe the skin, and improve pores. Among the active ingredients contained in Centella Asiatica Extract, saponins, flavonoids, and phenolic acids, which exhibit antioxidant and anti-inflammatory effects, help reduce erythema, improve skin barrier function, and improve skin moisture, which can help dry and sensitive skin.

The above-mentioned extracts of the root of the Korean ginseng, the extract of the white ginseng, or the extract of the purslane can be extracted with ethanol extract, water, C ₁ to C ₄ alcohol, or a mixed solvent thereof, but are not limited thereto. The above-mentioned alcohols of C ₁ to C ₄ can be at least one selected from the group consisting of methanol, ethanol, propyl alcohol, butyl alcohol, glycerin, propylene glycol, and butylene glycol, but are not limited thereto.

In addition, the extract of the root of the dandelion, the extract of the white chrysanthemum and the extract of the purslane in the present invention include not only the infusion liquid obtained by steeping or extracting the root of the dandelion, the white chrysanthemum and the purslane, respectively, but also the concentrate obtained by concentrating part or all of the infusion liquid, or the stagnant, precipitated, regular and fluidized extracts manufactured by drying the above concentrate, as well as the chemical substances contained in the root of the dandelion, the white chrysanthemum or the purslane and exerting the main effect, as well as the plants themselves.

The extract of the root of the Korean angelica tree, the extract of Baekhwasa seolcho and the extract of Centella asiatica of the present invention can be prepared according to methods known in the art, and the methods are not particularly limited.

For example, the root extract of the common dandelion can be manufactured by crushing the root of the common dandelion, making it into a powder, or cutting it into 2-3 mm lengths, soaking it in a solvent such as alcohol, ether, or a mixture of alcohol and water as an extraction solvent for a long time or boiling it in a double boiler, and then going through a process of concentration and drying.

Here, using the extract of Baekhwasa-seolcho as an example, Baekhwasa-seolcho is dried by any method such as natural drying or forced drying, finely ground, and then 5 to 20 times the volume of the dry weight of the ground product is added as an extraction solvent, water, _C1 to _C4 alcohol, or a mixed solvent of water and _C1 to _C4 alcohol, and then sedimentation is performed, filtered, and the filtrate is concentrated under reduced pressure. Water is added to the concentrate to disperse it, and then an equal amount of a low-polarity organic solvent such as ethyl acetate, chloroform, or diethyl ether is added to the dispersion and shaken. The organic layer is separated and concentrated under reduced pressure to obtain an extract with excellent activity. In the case of cold steeping and filtration as an extraction method, the active ingredient can be extracted by allowing it to mature for 12 _to 96 hours, or by leaving it in a solution at 4 to 25°C for 3 to 20 days using anhydrous or hydrous lower alcohols of _C1 to C4, ethyl acetate, or diethyl ether as a solvent. In the case of warm bathing, it may vary depending on the type and temperature of the solvent used, but it may be desirable to perform it for about 5 to 24 hours at a temperature close to the reflux temperature of the solvent.

Taking the extract of Centella asiatica as an example, the Centella asiatica is washed cleanly with water and dried in the shade. The dried Centella asiatica is then placed in an extraction container, an extraction solvent of 5 to 10 times its dry weight is added, and extraction is performed at 40 to 90°C for 1 to 10 hours. The extract can be filtered and concentrated using a vacuum rotary evaporator or the like. After the Centella asiatica extract is obtained, the solid content can be removed using filter paper or the like, the suspension can be centrifuged, and the supernatant can be filtered under reduced pressure.

The composition may contain 0.1 to 15 wt% of ascorbic acid, 0.01 to 12 wt% of hydrogenated lecithin, 0.01 to 10 wt% of a root extract of Angelica dahurica, 0.01 to 10 wt% of a white chrysanthemum extract, and 0.01 to 10 wt% of a centella asiatica extract based on the total weight of the composition, but is not limited thereto. If the content exceeds the above range, the effect may be reduced or the feeling of use may be impaired.

The composition has an effect of improving at least one selected from the group consisting of skin aging, loss of skin elasticity, reduction of collagen fibers or elastic fibers, wrinkle formation and skin dryness, and means that it can maintain or enhance the skin's ability to relate to elasticity and wrinkles.

Meanwhile, the cosmetic composition of the present invention, in addition to containing the above-described components as effective ingredients, includes components commonly used in cosmetic compositions. For example, it additionally includes conventional auxiliary agents and carriers such as conventional antioxidants, stabilizers, solubilizers, vitamins, pH regulators, colorants, flavoring agents, pigments, fragrances, bactericides, preservatives, moisturizers, thickeners, diluents, surfactants, alcohols, neutralizers, softeners, conditioning agents, excipients, inorganic salts, and synthetic polymer materials known in the art.

Additionally, their contents can be appropriately adjusted depending on the intended use of the final product.

For example, the carrier may include, but is not particularly limited to, purified water, monohydric alcohols (ethanol or propyl alcohol), polyhydric alcohols (glycerol, 1,3-butylene glycol, or propylene glycol), higher fatty acids (palmitic acid or linolenic acid), and fats (wheat germ oil, camellia oil, jojoba oil, olive oil, squalene, sunflower oil, macadamia peanut oil, avogado oil, or fatty acid glycerides).

In addition, non-limiting examples of usable surfactants include anionic surfactants, cationic surfactants, nonionic surfactants, and amphoteric surfactants. More specifically, the anionic surfactants include alkylbenzene sulfonates, polyoxyalkylene alkyl sulfate ester salts, alkyl sulfate ester salts, olefin sulfonates, alkyl phosphates, polyoxyalkylene alkyl ether phosphates, dialkyl sulfosuccinates, fatty acid salts, and the like, and the nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene fatty acid esters, polyhydric alcohol fatty acid partial esters, polyoxyethylene polyhydric alcohol fatty acid partial esters, polyglycerin fatty acid esters, polyoxyethylene hydrogenated castor oil derivatives, fatty acid diethanolamides, and the like. In addition, examples of cationic surfactants include tertiary aliphatic amine salts, alkyltrimethylammonium halides, dialkyldimethylammonium halides, etc., and examples of amphoteric surfactants include amide betaine type, imidazolinium betaine type, sulfo betaine type, etc.

Examples of the above moisturizers include, but are not limited to, glycerin, propylene glycol, 1,3-butylene glycol, dipropylene glycol, sorbitol, etc.

Examples of the above preservatives include, but are not limited to, benzoic acid, dehydroacetic acid, paraoxybenzoic acid esters (methyl paraoxybenzoate, butyl paraoxybenzoate, etc.), phenoxyethanol, etc.

As the above antioxidants, BHA and the like can be mentioned, and in addition, ultraviolet absorbers, anti-inflammatory agents, and refreshing agents can be added.

In addition, the cosmetic composition according to the present invention can be manufactured in any formulation commonly manufactured in the art, and can be any one formulation selected from the group consisting of toner, essence, serum, lotion, gel, paste, cream, powder, oil, pack, mist, soap, cleanser, makeup base, and foundation. More specifically, it can have the formulation of emollient toner, nourishing toner, astringent toner, skin, lotion, mist, essence, serum, cream, massage cream, pack, makeup base, BB cream, foundation, powder foundation, emulsion foundation, wax foundation, powder, cleansing foam, soap, cleansing cream, cleansing oil, cleansing water, or spray.

When the formulation of the present invention is a paste, cream or gel, animal oil, vegetable oil, wax, paraffin, starch, tragacanth, cellulose derivatives, polyethylene glycol, silicone, bentonite, silica, talc or zinc oxide may be used as the carrier component, but is not limited thereto.

When the formulation of the present invention is a powder or spray, lactose, talc, silica, aluminum hydroxide, calcium silicate or polyamide powder may be used as a carrier component, and particularly in the case of a spray, a propellant such as chlorofluorohydrocarbon, propane/butane or dimethyl ether may be additionally included, but is not limited thereto.

When the formulation of the present invention is a solution or emulsion, a solvent, a solubilizer or an emulsifier is used as a carrier component, and examples thereof include, but are not limited to, water, ethanol, isopropanol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3-butyl glycol oil, glycerol aliphatic ester, polyethylene glycol or fatty acid ester of sorbitan.

When the formulation of the present invention is a suspension, liquid diluents such as water, ethanol or propylene glycol, suspending agents such as ethoxylated isostearyl alcohol, polyoxyethylene sorbitol ester and polyoxyethylene sorbitan ester, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar or tragacanth may be used as carrier components, but are not limited thereto.

When the formulation of the present invention is a surfactant-containing cleansing agent, the carrier component may include, but is not limited to, aliphatic alcohol sulfate, aliphatic alcohol ether sulfate, sulfosuccinic acid monoester, isethionate, imidazolinium derivative, methyl taurate, sarcosinate, fatty acid amide ether sulfate, alkyl amidobetaine, fatty alcohol, fatty acid glyceride, fatty acid diethanolamide, vegetable oil, lanolin derivative, or ethoxylated glycerol fatty acid ester.

The cosmetic composition of the present invention can be used daily, and can also be used for an indefinite period of time. Preferably, the amount used, the number of times used, and the period of use can be appropriately adjusted according to the user's age, skin condition, or skin type.

In addition, in another aspect, the present invention provides a cosmetic for improving skin elasticity with enhanced stability comprising the cosmetic composition.

Hereinafter, examples are presented to help understand the present invention. However, the following examples are provided only to help understand the present invention more easily, and the content of the present invention is not limited by the following examples.

Manufacturing Example 1. Manufacturing of cosmetic composition

1) Preparation of extract from the root of the plant

The roots of the plant were washed in running water, cut into pieces, and then ground again to obtain a powder. 70% ethanol was added thereto in an amount 20 times that of the dried raw material, extracted for 3 hours, and polymer precipitates and mycelia were removed using a filter paper to obtain an extract. The extract was concentrated using a rotary vacuum evaporator (EYELA), and used in the following experiments.

2) Preparation of Baekhwasa Seolcho extract

After washing the Baekhwasa Seolcho in running water, it was dried and crushed. The crushed Baekhwasa Seolcho was immersed in 95% ethanol, 10 times the amount compared to the dried raw material, and extracted at 50℃ for 24 hours. After filtering using a filter paper, it was dried and concentrated under reduced pressure at 45℃ and used in the following experiment.

3) Preparation of bottle gourd extract

The bottle gourd was washed clean with water and dried in the shade. Then, 70% ethanol, 10 times the amount of dried raw material, was added to the dried bottle gourd and extracted at 70°C for 3 hours. After filtering using a filter paper, the solution was dried and concentrated under reduced pressure at 45°C and used in the following experiment.

Hydrogenated lecithin was purchased from Nikko (Lecinol® S-10, Tokyo, Japan). Ascorbic acid was purchased from Sigma-Aldrich Co. (USA).

A cosmetic composition was prepared with the composition and content (unit: weight%) according to Table 1 below.

Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Ascorbic acid 1.0 1.0 1.0 1.0 1.0 Hydrogenated Lecithin 3.0 3.0 3.0 3.0 3.0 Extract of the root of the dandelion 0.7 0.7 - - - Baekhwasa Seolcho Extract 0.7 - 0.7 - - Centella asiatica extract 0.7 - - 0.7 - 30% 1,3-butylene glycol to 100 to 100 to 100 to 100 to 100

Experimental Example 1. Analysis of collagen biosynthesis performance

Collagen, the main protein that composes the skin, is synthesized in the form of procollagen by fibroblasts present in the dermis and then secreted into the extracellular matrix. The procollagen secreted into the extracellular matrix is formed into active collagen when the C-terminus is decomposed by procollagen peptidase present on the cell surface. Therefore, by measuring the content of C-peptide, the content of activated collagen can be measured.

Primary dermal fibroblasts (normal, human, neonatal, ATCC No. PCS-201-010) were purchased from ATCC (Manassas, VA, USA) and used. The purchased cells were cultured in a fibroblast growth medium (Promo Cell, Heidelberg) at 37°C, 5% _CO2 incubator and used in the experiment.

To analyze collagen biosynthesis performance, human dermal fibroblasts were seeded at 1.0× ¹⁰⁶ cells/well in a 12-well plate, and the compositions of the examples and comparative examples were added at a concentration of 100 μM each, and cultured for 24 hours. After removing the medium from each well, the well was washed once with PBS, and 1 ml of PBS was added again, followed by irradiation with ultraviolet B (UVB) at 20 mJ/ ^cm2 . The PBS in each well was replaced with medium, and after culturing for 24 hours, the amount of procollagen secreted into the medium was measured using a procollagen type C-peptide EIA kit (Takara Bio, Japan). The standard solution included in the collagen measurement kit was diluted according to concentration, and the absorbance was measured at 450 nm to calculate the amount of collagen produced.

As shown in Fig. 1, when human skin fibroblasts were treated with drugs together with UV irradiation, the amount of procollagen and procollagen type I C-peptide (PIP) secreted into the extracellular matrix was measured. As a result, the amount of procollagen secreted in the control cells irradiated with UV (+UVB) was significantly reduced compared to the normal cells (-UVB), and the amount of collagen in the cells treated with the compositions of Examples 2 to 4 together with UV irradiation significantly increased by 21% to 30% compared to the control cells irradiated only with UV (+UVB). Meanwhile, the amount of collagen in the cells treated with the composition of Example 1 significantly increased by 58% compared to the control cells irradiated with UV (+UVB). This is about twice as high as the amount of collagen observed in the cells treated with Examples 2 to 4 (21%, 30%, and 27%, respectively) containing a mixture of ascorbic acid, hydrogenated lecithin, and one extract (Fig. 1). Meanwhile, it can be confirmed that Comparative Example 1 shows a significantly lower value than the embodiment of the present invention. When these results are substituted into the Colby formula, it can be confirmed that a synergistic effect is shown when ascorbic acid, hydrogenated lecithin, extract of the root of the Korean angelica tree, extract of Baekhwasa seolcho, and extract of Centella asiatica are treated together. Therefore, it can be seen that the composition of the present invention increases the amount of activated collagen in human skin fibroblasts, and this collagen increasing effect is more effectively shown when the components of the present invention are used together.

Experimental Example 2. Analysis of skin elasticity improvement efficacy

To analyze the skin elasticity improvement efficacy, an elastase inhibition assay was performed. 0.1 g of Elastin-Congo red (Sigma) and 2.5 g of agar were mixed in 200 mM Tris-HCl Buffer (pH 8.8), sterilized, poured into a petri dish, and allowed to harden. After the medium hardened, a hole was made, and 1800 units/mL of elastase enzyme solution and 10 ㎕ of the compositions of the examples and comparative examples were prepared, mixed, and reacted at room temperature for 10 minutes. 10 ㎕ of the reacted sample was placed into the hole of the elastin-congo red agar, and cultured at 37℃ for 18 hours, and then the halo diameter was measured. As a control, retinol crystals were added dropwise together with elastase for comparison. The results are shown in Table 2 below.

Treatment concentration (W/V, %) Halo diameter(cm) Example 1 0.2 0.4 Example 2 0.2 0.8 Example 3 0.2 0.7 Example 4 0.2 0.7 Comparative Example 1 0.2 1.6 Elastase 0.1 2.1 Retinol Crystal 0.1 0.5

As shown in Table 2 above, a larger halo diameter means a greater amount of elastin decomposition, which means that Examples 1 to 4 of the present invention have far superior elastin decomposition inhibition ability compared to Comparative Example 1, and among them, Example 1 of the present invention exhibits the best elastin decomposition inhibition effect. Accordingly, it can be confirmed that the composition of the present invention has the effect of improving skin wrinkles and elasticity by inhibiting elastin decomposition.

Experimental Example 3. Analysis of skin moisturizing effect improvement

In order to confirm the skin moisturizing effect, the skin moisture content of a randomly selected subject was measured using a Cutometer MPA 580 device, and a sample (exactly 10 ㎕) was taken using a pipette, dropped onto the skin of a randomly selected subject, and lightly applied with a cotton swab. The moisture content change of the area where the sample was applied was measured 120 minutes after application, and the results are shown in Table 3 below. However, the moisturizing test was performed under conditions of a temperature of 22 to 23°C and a humidity of 17 to 18%, and 1,3-butylene glycol, a chemical ingredient commonly used as a moisturizer, was used as a positive control group.

Moisture content (%) Example 1 52.1 Example 2 28.5 Example 3 36.2 Example 4 33.8 Comparative Example 1 23.7 Control group 22.9

As shown in Table 3 above, Examples 1 to 4 of the present invention were confirmed to maintain a high moisture content compared to Comparative Example 1 and the control group, and Example 1 was confirmed to have the best moisture content. From the results as described above, it was confirmed that the composition of the present invention has excellent moisturizing improvement efficacy, and thus can help prevent skin dryness and improve skin elasticity.

Experimental Example 4. Formulation Stability Evaluation

A cosmetic composition was prepared according to the composition and content (unit: weight %) in Table 4 below, and the formulation stability was evaluated. The stability evaluation was performed by closing the lid and sealing it in a transparent plastic container, storing it under room temperature (25°C) and high temperature (50°C) conditions, and visually evaluating it.

Example 5 Comparative Example 2 Ascorbic acid 1.000 1.000 Hydrogenated Lecithin 3.000 0.000 Extract of the root of the dandelion 0.700 0.700 Baekhwasa Seolcho Extract 0.700 0.700 Centella asiatica extract 0.700 0.700 glycerin 7.000 7.000 Isopropyl isostearate 5.000 5.000 Beeswax 3.000 3.000 Niacinamide 2.000 2.000 Sorbitan stearate 0.800 0.800 Polysorbate 60 0.800 0.800 Glyceryl Stearate-SE 0.500 0.500 Ceresin 0.500 0.500 Ethylhexanediol 0.480 0.480 Polyacrylate-13 0.245 0.245 Glyceryl caprylate 0.120 0.120 Tocopheryl acetate 0.100 0.100 Adenosine 0.040 0.040 1,2-Hexanediol 2.000 2.000 Allantoin 0.010 0.010 Ethylhexylglycerin 0.015 0.015 Purified water to 100 to 100

Example 5 Comparative Example 2 Room temperature Immediately after manufacturing stability stability Next day stability stability 1 week after manufacturing stability relatively stable 2 weeks after manufacturing stability relatively bad High temperature Immediately after manufacturing stability stability Next day stability relatively stable 1 week after manufacturing stability relatively bad 2 weeks after manufacturing relatively stable Very bad

As shown in Table 5 above, in the case of Example 5 containing hydrogenated lecithin, it can be seen that the formulation stability is excellent at room temperature and high temperature, whereas in the case of Comparative Example 2 not containing hydrogenated lecithin, the formulation stability is rapidly reduced. Through this, it can be seen that the cosmetic composition of the present invention has excellent formulation stability and can preserve the active ingredients in their original state, thereby maintaining the effect without reduction.

Experimental Example 5. Skin Irritation Evaluation

For the skin irritation evaluation of the composition of the above Example 5, 30 adult men and women aged 20 to 55 were asked to indicate whether or not they experienced skin irritation through a questionnaire, and a visual evaluation was conducted. The questionnaire for skin irritation evaluation consisted of a total of 8 items: erythema, swelling, scald, itching, stinging, burning sensation, stiffness, and tingling. As a result of the questionnaire, no abnormal skin reactions were observed in any of the subjects, and it was confirmed that no abnormal skin reactions were observed in the visual evaluation.

The cosmetic composition of the present invention, which is configured as described above, contains ascorbic acid, hydrogenated lecithin, aster root extract, white chrysanthemum extract, and centella asiatica extract as effective ingredients, thereby synthesizing skin collagen, inhibiting elastin decomposition, and having an excellent moisturizing effect, thereby improving skin wrinkles, skin aging, skin dryness, and decreased skin elasticity, and it can be seen that it exhibits an even better effect due to the synergistic effect between the ingredients.

An example of a formulation of a composition according to one aspect of the present disclosure is described below, but it is also applicable to various other formulations, which are not intended to limit the present disclosure but are merely intended to be specifically illustrative.

Formulation Example 1. Toner

A toner was prepared by a conventional method according to the composition described below. (Weight %)

Ascorbic acid 1.0

Hydrogenated Lecithin 3.0

Golgam root extract 0.7

Baekhwasa Seolcho Extract 0.7

Centella asiatica extract 0.7

Glycerin 3.0

Butylene glycol 3.0

Propylene glycol 3.0

Carboxyvinyl polymer 0.1

beeswax 4.0

Polysorbate 60

Caprylic/Capric Triglyceride 5.0

Squalane 5.0

Sorbitan sesquioleate 1.5

Cetearyl alcohol 1.0

Tromethamine 0.2

Preservatives, fragrances as needed

Remaining purified water

Formulation Example 2. Lotion

A lotion was prepared by a conventional method according to the composition described below. (Weight %)

Ascorbic acid 1.0

Hydrogenated Lecithin 3.0

Golgam root extract 0.7

Baekhwasa Seolcho Extract 0.7

Centella asiatica extract 0.7

Diethyl ascorbic acid 1.0

Sodium citrate 0.1

Licorice extract 0.2

1,3-Butylene Glycol 3.0

Remaining purified water

Formulation Example 3. Cream

A cream was prepared by a conventional method according to the composition described below. (Weight %)

Ascorbic acid 1.0

Hydrogenated Lecithin 3.0

Golgam root extract 0.7

Baekhwasa Seolcho Extract 0.7

Centella asiatica extract 0.7

Glycerin 3.5

Butylene glycol 3.0

Liquid paraffin 7.0

Beta Glucan 7.0

Carbomer 0.1

Caprylic/Capric Triglyceride 3.0

Squalane 5.0

Cetearyl Glucoside 1.5

Sorbitan stearate 0.4

Polysorbate 60 1.2

Tromethamine 0.1

Preservatives, fragrances as needed

Remaining purified water

The above description is merely an example of the present invention, and those skilled in the art will appreciate that various modifications may be made without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in this specification are not intended to limit the present invention but to explain it, and the spirit and scope of the present invention are not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all techniques within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

The cosmetic composition according to the present invention has an excellent effect of improving skin elasticity and is harmless to the human body, so it can be used industrially.

Claims (8)

Cosmetic composition for improving skin elasticity with enhanced stability, containing ascorbic acid, hydrogenated lecithin, extract of the root of the common dandelion, extract of the white dandelion, and extract of the purslane plant as effective ingredients A cosmetic composition according to claim 1, characterized in that the ascorbic acid comprises sodium ascorbyl phosphate, magnesium ascorbyl phosphate, ascorbyl glucoside or aminopropyl ascorbyl phosphate. In claim 1, a cosmetic composition characterized in that the total weight of the composition comprises 0.1 to 15 wt% of ascorbic acid, 0.01 to 12 wt% of hydrogenated lecithin, 0.01 to 10 wt% of a root extract of the Korean ginseng, 0.01 to 10 wt% of a white ginseng extract, and 0.01 to 10 wt% of a centella asiatica extract. In claim 1, a cosmetic composition characterized in that the skin elasticity is at least one selected from the group consisting of skin aging, loss of skin elasticity, reduction of collagen fibers or elastic fibers, wrinkle formation, and skin dryness. In claim 1, a cosmetic composition characterized in that the extract of the root of the Korean ginseng, the extract of the white ginseng, or the extract of the purslane are extracted with ethanol extract, water, alcohol of C ₁ to C _4, or a mixed solvent thereof. In claim 5, a cosmetic composition characterized in that the alcohol of C ₁ to C ₄ is at least one selected from the group consisting of methanol, ethanol, propyl alcohol, butyl alcohol, glycerin, propylene glycol and butylene glycol. In claim 1, the composition is a cosmetic composition characterized in that it is formulated as one selected from the group consisting of a toner, an essence, a serum, a lotion, a gel, a paste, a cream, a powder, an oil, a pack, a mist, a soap, a cleanser, a makeup base, and a foundation. Cosmetics for improving skin elasticity with enhanced stability, comprising a cosmetic composition according to any one of claims 1 to 7

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