Cosmetic composition for skin whitening and wrinkle improvement

Abstract

The whitening and wrinkle-improving cosmetic composition according to one embodiment of the present invention is a cosmetic composition that can effectively stabilize a high content of vitamin C in a high-moisture environment, and is characterized by being an oil-in-water type cosmetic composition and having a refractive index of 1.35 to 1.46.

Description

Technical Field

[0001] The present invention relates to a cosmetic composition for whitening and improving wrinkles, and specifically, to a water-in-oil (O / W) type cosmetic composition for whitening and improving wrinkles containing a high content of vitamin C.

Background Art

[0002] When the skin is exposed to ultraviolet rays, melanin, which determines human skin color, is synthesized and released onto the skin surface, inducing hyperpigmentation disorders such as freckles, age spots, and liver spots, resulting in unfavorable cosmetic effects. Melanin uses tyrosine in the cell as a substrate, and an enzyme called tyrosinase generates dopaquinone. Through an auto-oxidation reaction and an enzymatic reaction from dopaquinone, melanin, a copolymer, is produced. Therefore, by inhibiting some of the reactions during the melanin production process and reducing melanin synthesis, it is possible to prevent the skin color from darkening and to prevent the formation of freckles, age spots, etc. Representative whitening raw materials known to inhibit the synthesis process include kojic acid, arbutin, vitamin C, and the like.

[0003] Vitamin C is a compound with a γ-lactone structure and is unstable, making it highly sensitive to external environmental factors such as air, especially oxygen, heat, and light, and easily decomposing through oxidation. The oxidation reaction of vitamin C generally involves two consecutive electron transfer processes, where the dissociation of hydrogen ions produces dihydroascorbate radicals, an intermediate of vitamin C oxidation. These radicals are highly reactive and are known to react in pairs to produce one molecule of vitamin C and dihydroascorbic acid. While only a very small amount of such vitamin C dissolves in non-aqueous solutions, a large amount dissolves in aqueous solutions. However, due to its rapid oxidation, a sufficient amount of vitamin C cannot be stabilized, and therefore, it has been reported that only small amounts of vitamin C can be used as an active ingredient in pharmaceuticals, foods, and cosmetics.

[0004] To solve this problem, a formulation was developed in which vitamin C is dispersed in a large amount of polyol instead of water within the formulation. However, dispersing vitamin C in a large amount of polyol resulted in a sticky formulation that caused skin creasing, and also reduced the whitening effect because the vitamin C did not dissolve within the formulation.

[0005] Therefore, there is a need for technological development of cosmetic compositions that can stabilize high concentrations of vitamin C even in environments with large amounts of moisture.

[0006] On the other hand, the background technology described above cannot necessarily be considered publicly known technology that was made public before the filing of the present invention. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Registered Patent No. 10-2350285 of the Republic of Korea [Overview of the project] [Problems that the invention aims to solve]

[0008] One embodiment of the present invention aims to provide a cosmetic composition that can effectively stabilize high-content vitamin C in a high-moisture environment.

[0009] Furthermore, one embodiment of the present invention aims to provide a cosmetic composition that has improved usability and exhibits anti-aging and whitening effects.

[0010] As a technical means for achieving the technical problems described above, a cosmetic composition for whitening and wrinkle improvement according to one embodiment of the present invention is characterized by being an oil-in-water type and having a refractive index of 1.35 to 1.46.

[0011] For example, a cosmetic composition for skin whitening and wrinkle improvement may be characterized by comprising an oil phase, an aqueous phase, and a surfactant.

[0012] For example, the oil phase may be characterized by containing an emollient having a carboxylic acid group, an oil-absorbing powder, and a silicone oil.

[0013] For example, the aqueous phase may be characterized by containing water, vitamin C, polyol, and a pH adjusting agent.

[0014] For example, the cosmetic composition may be characterized by containing water in an amount of 35% by weight or more relative to its total weight.

[0015] For example, the cosmetic composition may be characterized by containing vitamin C in an amount of 2 to 30% by weight relative to the total weight of the cosmetic composition.

[0016] For example, the polyol may be contained in an amount of 3 to 30% by weight relative to the total weight of the cosmetic composition.

[0017] For example, the surfactant may be included in an amount of 0.1 to 5.0% by weight relative to the total weight of the cosmetic composition.

[0018] For example, a cosmetic composition for skin whitening and wrinkle improvement may be characterized by having a pH of 3.2 to 4.0.

[0019] For example, a cosmetic composition for whitening and wrinkle improvement may be characterized by being a dosage form selected from the group consisting of ampoules, essences, softening lotions, nourishing lotions, toners, mask packs, creams, lotions, gels, ointments, patches, sprays, mists, and sun creams. [Effects of the Invention]

[0020] According to one embodiment of the present invention, a cosmetic composition for whitening and wrinkle improvement can be provided that can suppress the oxidation and decomposition of vitamin C in a large amount of water and maintain dosage form stability even during long-term storage.

[0021] According to one embodiment of the present invention, a cosmetic composition for whitening and wrinkle improvement that can maintain its stability over time even when stored for a long period of time under high-temperature conditions can be provided. More specifically, even when stored for a long period of time under high-temperature conditions, the oxidation of vitamin C and discoloration of the cosmetic composition can be minimized.

[0022] The effects obtained from the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by a person with ordinary skill in the art to which the present invention pertains from the description below. [Modes for carrying out the invention]

[0023] The following describes embodiments of the present invention in detail so that they can be easily implemented by a person with ordinary skill in the art to which the present invention pertains. However, the present invention can be embodied in a variety of different forms and is not limited to the embodiments described herein.

[0024] Throughout the specification, the term that a certain part is "connected" to another part includes not only the case where it is "directly connected", but also the case where it is "indirectly connected" with other components intervening therebetween. Also, the term that a certain part "includes" a certain component means that it can further include other components rather than excluding other components unless otherwise stated.

[0025] The cosmetic composition for whitening and wrinkle improvement according to an embodiment of the present invention can provide an anti-aging and whitening effect.

[0026] The cosmetic composition for whitening and wrinkle improvement according to an embodiment of the present invention is of an oil-in-water (O / W) type in which an oil phase is dispersed in an aqueous phase.

[0027] Since the cosmetic composition for whitening and wrinkle improvement according to an embodiment of the present invention is of an oil-in-water (O / W) type, it has a moist and soft feel in use and excellent stretchability.

[0028] The cosmetic composition for whitening and wrinkle improvement according to an embodiment of the present invention can be manufactured into ampoules, essences, softening lotions, nourishing lotions, toners, mask packs, creams, lotions, gels, ointments, patches, as well as sprays, mists, sun creams, etc.

[0029] The cosmetic composition for whitening and wrinkle improvement according to an embodiment of the present invention can include an oil phase, an aqueous phase, and a surfactant.

[0030] The oil phase according to an embodiment of the present invention can include an emollient having a carboxylic acid group, oil-absorbing powder, and silicone oil.

[0031] An emollient according to one embodiment of the present invention may be included to provide an environment in which vitamin C is efficiently absorbed into the body. Specifically, the emollient can form a moisture film that prevents the evaporation of water, which acts as a solvent, when vitamin C is absorbed into the body. Therefore, a large amount of vitamin C can be efficiently absorbed into the body.

[0032] An emollient according to one embodiment of the present invention has a carboxylic acid group, and for example, dicaprylyl carbonate, PCA dimethicone, amodimethicone, etc., can be used.

[0033] An oil-absorbing powder according to one embodiment of the present invention may be included to prevent excessive oil generation in the cosmetic composition. Specifically, the oil-absorbing powder can absorb oil in the cosmetic composition and improve the sticky feeling.

[0034] Examples of oil-absorbing powders that can be used include vinyl dimethicone / methicone silsesquioxane crosspolymer, polysilicone-11, polysilicone-13, diphenyl dimethicone / vinyl diphenyl dimethicone / silsesquioxane crosspolymer, dimethicone / vinyl dimethicone crosspolymer, dimethicone / phenyl vinyl dimethicone crosspolymer, and polymethylsilsesquioxane.

[0035] A silicone oil according to one embodiment of the present invention may be included to enable effective absorption of the cosmetic composition into the body. Specifically, the silicone oil can effectively diffuse the components contained in the cosmetic composition into the skin.

[0036] Examples of silicone oils that can be used include methicone-based silicone oil, dimethicone-based silicone oil, cyclomethicone-based silicone oil, and phenyltrimethicone-based silicone oil.

[0037] The aqueous phase according to one embodiment of the present invention may contain water, vitamin C, a polyol, and a pH adjuster.

[0038] Water in one embodiment of the present invention may be included for use as a solvent in which vitamin C can be dissolved.

[0039] Water according to one embodiment of the present invention may be contained in an amount of 35% by weight or more relative to the total weight of the cosmetic composition.

[0040] If water is present in less than 35% by weight of the total weight of the cosmetic composition, the low water content may result in insufficient moisture, and the formulation may become excessively sticky. Furthermore, because vitamin C may not dissolve sufficiently, the anti-aging and whitening effects of the cosmetic composition may be minimal.

[0041] Vitamin C according to one embodiment of the present invention may be included to have anti-aging and whitening effects.

[0042] Vitamin C (Ascorbic acid) is one of the five essential nutrients important to the human body, along with fats, carbohydrates, proteins, and minerals. It enhances the body's immune function and promotes the production of collagen, a component of cartilage, capillaries, and muscles. Vitamin C also plays a role in preventing skin damage by destroying chemicals produced when ultraviolet rays penetrate the skin. In addition, as an antioxidant, vitamin C suppresses the action of reactive oxygen species, preventing wrinkles, maintaining healthy skin, and aiding in the healing of damaged skin tissue. It also prevents the formation of histamine, which is known to cause allergic reactions, and melanin, which causes skin discoloration during the aging process.

[0043] Therefore, vitamin C according to one embodiment of the present invention can be contained in a cosmetic composition to provide anti-aging and whitening effects.

[0044] The vitamin C of the present invention is synthetic ascorbic acid, specifically, a form in which chemical components such as sugars, fatty acids, and ether groups are bonded to pure vitamin C, and which can be converted back to pure vitamin C in the body by enzymes.

[0045] For example, vitamin C can be used in the form of sodium ascorbyl phosphate (SAP), magnesium ascorbyl phosphate (MAP), calcium ascorbyl phosphate (Calsium ascorbyl phosphate), ascorbic acid polypeptide, ethyl ascorbyl ether, ascorbyl dipalmitate, ascorbyl palmitate, ascorbyl stearate, ascorbyl glucoside, or ascorbyl ethylsilanol pectinate.

[0046] Vitamin C according to one embodiment of the present invention may be contained in an amount of 2 to 30% by weight relative to the total weight of the cosmetic composition.

[0047] If vitamin C is contained in less than 2% by weight of the total weight of the cosmetic composition, the anti-aging and whitening effects of the cosmetic composition may be minimal due to the low amount of vitamin C. Conversely, if vitamin C is contained in more than 30% by weight of the total weight of the cosmetic composition, the vitamin C content within the dosage form may become saturated, and the effect of vitamin C in improving the functionality of the cosmetic composition may not be as significant as when it is contained at 30% by weight or less.

[0048] A polyol according to one embodiment of the present invention may be included to stabilize vitamin C.

[0049] Examples of polyols used in one embodiment of the present invention include glycerin, propanediol, 1,2-hexanediol, butylene glycol, and caprylyl glycol (1,2-octanediol).

[0050] A polyol according to one embodiment of the present invention may be included in the cosmetic composition in an amount of 3 to 30% by weight relative to the total weight.

[0051] If polyols are present in less than 3% by weight of the total weight of the cosmetic composition, vitamin C may not be stabilized and may easily oxidize and decompose. Conversely, if polyols are present in more than 30% by weight of the total weight of the cosmetic composition, the formulation of the cosmetic composition may become sticky, creasing on the skin and reducing its feel.

[0052] A pH adjusting agent according to one embodiment of the present invention may be included to adjust the pH of the aqueous phase so that vitamin C is further stabilized.

[0053] Potential pH adjusters include malic acid, citric acid, acetic acid, propionic acid, oxalic acid, glycolic acid, malonic acid, lactic acid, succinic acid, tartaric acid, aspartic acid, maleic acid, glutaric acid, glutamic acid, gluconic acid, sorbic acid, benzoic acid, salicylic acid, triethanolamine, arginine, tromethamine, sodium hydroxide, and potassium hydroxide.

[0054] A surfactant according to one embodiment of the present invention may be included to uniformly mix the aqueous phase and the oil phase.

[0055] As surfactants, hydrophobic nonionic surfactants or hydrophilic nonionic surfactants may be used. As hydrophobic nonionic surfactants, lauryl polyglyceryl-3-polydimethylsiloxyethyl dimethicone, lauryl PEG-9-polydimethylsiloxyethyl dimethicone, and PEG-10 dimethicone may be used. As hydrophilic nonionic surfactants, polysorbate substances such as polysorbate 20, polysorbate 40, polysorbate 60, and polysorbate 80 may be used.

[0056] A surfactant according to one embodiment of the present invention may be included in the cosmetic composition in an amount of 0.1 to 5% by weight relative to the total weight.

[0057] If the surfactant is present in less than 0.1% by weight of the total weight of the cosmetic composition, the aqueous phase and the oil phase may not mix well, and layer separation may occur between the two substances. Conversely, if the surfactant is present in more than 5% by weight of the total weight of the cosmetic composition, it may dry out or irritate the skin.

[0058] A cosmetic composition for skin whitening and wrinkle improvement according to one embodiment of the present invention can have an optimized acidity for the absorption of vitamin C into the skin. Specifically, a cosmetic composition for skin whitening and wrinkle improvement according to one embodiment of the present invention can have a pH of 3.2 to 4.0.

[0059] If the pH of a cosmetic composition for skin whitening and wrinkle improvement is less than 3.2, the extremely high acidity may irritate the skin. Conversely, if the pH of a cosmetic composition for skin whitening and wrinkle improvement is greater than 4.0, the equilibrium of ascorbic acid may shift to the form of ascorbate, reducing the content of the reduced form of ascorbic acid and potentially decreasing its antioxidant effect.

[0060] Furthermore, the cosmetic composition for whitening and wrinkle improvement according to one embodiment of the present invention has a refractive index that allows vitamin C to be stabilized in a large amount of water. Specifically, the cosmetic composition for whitening and wrinkle improvement according to one embodiment of the present invention has a refractive index of 1.35 to 1.46.

[0061] The inventors of the present invention have discovered that when the refractive index of an oil-in-water type cosmetic composition for whitening and wrinkle improvement, comprising an oil phase, an aqueous phase, and a surfactant, falls within a specific range, it induces the dosage form stability of vitamin C even in a large amount of water, thereby preventing a decrease in activity during long-term storage.

[0062] This is thought to be due to the suppression of the photodegradation and oxidation reaction of vitamin C by matching the refractive index of the vitamin C-containing cosmetic composition to a range between the refractive index of the aqueous phase and the refractive index of the oil phase. In particular, such a photodegradation and oxidation reaction can be more readily induced at low pH (e.g., pH 4.0 or lower), and thus improving the dosage form stability of the vitamin C-containing cosmetic composition in the pH range of 3.2 to 4.0 is a difficult technical challenge. However, the whitening and wrinkle-improving cosmetic composition of the present invention can suppress the photodegradation and oxidation reaction due to the refraction and scattering of light by controlling its refractive index to a range between the refractive index of the oil phase and the aqueous phase, and can provide excellent dosage form stability even in a low pH range.

[0063] Furthermore, because the vitamin C in the present invention's cosmetic composition for skin whitening and wrinkle improvement is stabilized in a large amount of water, it can be effectively absorbed into the body and provide anti-aging and skin whitening effects.

[0064] <Modes for carrying out the invention> The present invention will be described in detail below through examples and comparative examples, but the present invention is not limited to these examples.

[0065] The inventors of the present invention conducted the following experiment to investigate the correlation between the refractive index and the time-dependent stability with respect to vitamin C of a cosmetic composition for skin whitening and wrinkle improvement according to one embodiment of the present invention.

[0066] First, Examples 1 to 12 and Comparative Examples 1 to 5 were prepared by varying the content of the components contained in the cosmetic composition.

[0067] Specifically, Examples 1 to 12 of the present invention were manufactured using the components and content shown in Table 1.

[0068] [Table 1]

[0069] Comparative Examples 1-5 were manufactured using the ingredients and content shown in Table 2.

[0070] [Table 2]

[0071] Referring to Tables 1 and 2, dimethicone was used as the silicone oil in the oil phase, and dicaprylyl carbonate was used as the molient containing a carboxylic acid.

[0072] Furthermore, glycerin was used as the polyol in the aqueous phase, and sodium hydroxide was used as the pH adjuster.

[0073] After completing the manufacturing of Examples 1-12 and Comparative Examples 1-5, the refractive index of each composition was measured. The refractive index was measured using a Reichert AD200 digital refractometer at 20°C with the samples stacked. Three measurements were repeated, and the average value was calculated. The measurement results are shown in Table 3 below.

[0074] [Table 3]

[0075] Referring to Table 3, it can be confirmed that Examples 1-12 have refractive indices between 1.35 and 1.46. In contrast, Comparative Examples 1-5 can be confirmed to have refractive indices outside the range of 1.35-1.46.

[0076] Next, 30 ml of the cosmetic compositions of Examples 1-12 and Comparative Examples 1-5 were stored in an incubator at 50°C, and the vitamin C content and the presence or absence of discoloration were analyzed over time, as shown in Table 4.

[0077] [Table 4]

[0078] Referring to Table 4, it can be confirmed that no discoloration occurred in Examples 1 to 12 even after 4 weeks. Conversely, it can be confirmed that discoloration occurred in Comparative Examples 1 to 5 after 4 weeks.

[0079] Furthermore, in Examples 1 to 12, it was confirmed that there was little decrease in the potency of vitamin C during long-term storage.

[0080] Specifically, in Examples 1 to 12, it was confirmed that the vitamin C content had decreased to 3.0% or less even after two weeks.

[0081] Conversely, in Comparative Examples 1-5, it was confirmed that the vitamin C content decreased by 7.5% or more after two weeks.

[0082] Furthermore, in Examples 1-12, the decrease in vitamin C potency was minimal even after 4 weeks. Specifically, in Examples 1-12, the vitamin C content decreased to 5.9% or less even after 4 weeks.

[0083] Conversely, in comparative examples 1-5, it was confirmed that the vitamin C content decreased by 18.8% or more after 4 weeks.

[0084] Through this, we were able to confirm that since Examples 1 to 12 have a refractive index of 1.35 to 1.46, the oxidation and decomposition of vitamin C is suppressed, and thereby the decrease in the potency of vitamin C is minimized even during long-term storage.

[0085] Furthermore, since Examples 1 to 12 have a refractive index of 1.35 to 1.46, it was confirmed that the oxidation of vitamin C and the resulting discoloration of the cosmetic composition were minimized.

[0086] Conversely, in the case of Comparative Examples 1 to 5, the refractive index was outside the range of 1.35 to 1.46, so it was confirmed that vitamin C was oxidized and decomposed, and as a result, the reduction in the potency of vitamin C during long-term storage could not be prevented, and discoloration could not be prevented.

[0087] In other words, the cosmetic composition for whitening and wrinkle improvement according to one embodiment of the present invention has a refractive index of 1.35 to 1.46, which means that it can prevent the photodegradation of vitamin C and water by light and the oxidation of vitamin C.

[0088] In particular, the cosmetic composition for whitening and wrinkle improvement according to one embodiment of the present invention can maintain excellent dosage form stability and long-term stability even at low pH levels in the range of 3.2 to 4.0. Specifically, the cosmetic composition for whitening and wrinkle improvement according to one embodiment of the present invention can minimize the decrease in vitamin C content and prevent discoloration of the cosmetic composition even when stored for a long period of time.

[0089] Furthermore, the cosmetic composition for whitening and wrinkle improvement according to one embodiment of the present invention contains a high content of water and vitamin C, so it is moist and has excellent spreadability, and can provide a cosmetic composition with excellent anti-aging and whitening effects.

[0090] The scope of the present invention is defined by the claims, which are set forth below rather than by the detailed description above, and all modifications or alterations derived from the meaning and scope of the claims and the concept of equivalents thereof should be interpreted as being included within the scope of the present invention. [Industrial applicability]

[0091] This invention relates to a cosmetic composition for skin whitening and wrinkle improvement, and is applicable to various industrial fields in which the cosmetic composition is used. For example, it can be used in diverse industrial fields such as cosmetics, skincare, and the medical industry.

Claims

1. It consists of an oil-in-water formulation, A cosmetic composition for whitening and wrinkle improvement having a refractive index of 1.35 to 1.46, The aforementioned cosmetic composition for whitening and wrinkle improvement comprises an oil phase, an aqueous phase, and a surfactant. The oil phase portion is Emollients having a carboxylic acid group; and Contains silicone oil, The aqueous phase portion is water; Vitamin C; Polyols; and Contains a pH adjuster, The water is included in an amount of 35% by weight or more relative to the total weight of the cosmetic composition. The aforementioned vitamin C is contained in an amount of 2 to 30% by weight relative to the total weight of the cosmetic composition. The aforementioned cosmetic composition for whitening and wrinkle improvement is characterized by having a pH of 3.2 to 4.

0.

2. The cosmetic composition for whitening and wrinkle improvement according to claim 1, characterized in that the polyol is contained in an amount of 3 to 30% by weight relative to the total weight of the cosmetic composition.

3. The cosmetic composition for whitening and wrinkle improvement according to claim 1 or 2, characterized in that the surfactant is contained in an amount of 0.1 to 5.0% by weight relative to the total weight of the cosmetic composition.

4. The cosmetic composition for whitening and wrinkle improvement according to claim 1, characterized in that the oil phase further comprises an oil-absorbing powder.

5. The cosmetic composition for whitening and wrinkle improvement described above is characterized in that the dosage form is selected from the group consisting of ampoules, essences, softening lotions, nourishing lotions, toners, mask packs, creams, lotions, gels, ointments, patches, sprays, mists, and sun creams, as described in claim 1.

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