KR-102963318-B1 - Stabilized high-concentration vitamin C cosmetic composition and its preparing method

Abstract

The present invention provides a cosmetic composition in the form of a water-in-oil emulsion containing high concentration vitamin C, which suppresses a long-term decrease in the potency of vitamin C by preparing a water-in-oil emulsion having a high concentration aqueous vitamin C solution as the dispersed phase and silicone oil and silicone crosspolymer as the continuous phase, and a method for preparing the same.

Inventors

• 권혁철
• 권순오

Assignees

• 주식회사 경림

Dates

Publication Date

20260511

Application Date

20240911

Claims (11)

1. An aqueous phase containing vitamin C; and A water-in-oil emulsion cosmetic composition comprising an oil phase including silicone oil, a silicone crosspolymer, and a silicone polymer emulsifier, wherein the vitamin C is included in an amount of 15 to 20 weight% based on the total composition, and the oil phase comprises 15 to 30 weight% silicone oil, 3 to 10 weight% silicone crosspolymer, and 0.5 to 2 weight% silicone polymer emulsifier based on the total composition. Water-in-oil emulsion cosmetic composition.
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3. In paragraph 1, An aqueous phase comprising vitamin C, polyols, and antioxidants; and A component comprising an oil phase including silicone oil, silicone crosspolymer, and silicone polymer emulsifier, Water-in-oil emulsion cosmetic composition.
4. In paragraph 3, The above aqueous phase is characterized by comprising 15 to 20 weight% vitamin C, 2 to 5 weight% polyol, and 0.5 to 2 weight% antioxidant based on the total composition. Water-in-oil emulsion cosmetic composition.
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6. In paragraph 1 or 3, The above aqueous phase is characterized by being 55 to 80 weight percent of the total composition, Water-in-oil emulsion cosmetic composition.
7. In paragraph 1, The above silicone oil is Phenyltrimethicone, Cyclomethicone, Dimethicone, Decamethylcyclopentasiloxane, Bis-HydroxyethoxypropylDimethicone, MethylphenylPolysiloxane, Laurylmethicone, Phenyldimethicone, Cyclohexasiloxane, Phenyltrimethicone, Lauryltrimethicone, Capryltrimethicone, Phenylmethicone, Tetramethyldisiloxane, and Characterized as being one or more combinations selected from the group consisting of disiloxanes, Water-in-oil emulsion cosmetic composition.
8. In paragraph 1, The above silicone crosspolymer is Characterized by being one or more combinations selected from the group consisting of dimethicone/vinyldimethicone crosspolymer, dimethicone/phenylvinyldimethicone crosspolymer, vinyldimethicone/lauryldimethicone crosspolymer, laurylpolydimethiylsiloxyethyldimethicone/bis-vinyldimethicone crosspolymer, and vinyldimethicone/methiconesilsesquioxane crosspolymer. Water-in-oil emulsion cosmetic composition.
9. In paragraph 1, The above silicone polymer emulsifier Bis-PEG/PPG-14/14 Dimethicone, CetylPEG/PPG-10/1 Dimethicone, Polyglyceryl-4 Isostearate, LaurylPEG-8 Dimethicone, PEG-9 Polydimethylsiloxyethyl Dimethicone, LaurylPEG-9 Polydimethylsiloxyethyl Dimethicone, PEG/PPG-19/19 Dimethicone, and LaurylPEG/PPG-18/18 Characterized as being one or more combinations selected from the group consisting of methicone (LaurylPEG/PPG-18/18 Methicone), Water-in-oil emulsion cosmetic composition.
10. A step of preparing an aqueous phase containing vitamin C, polyol, and antioxidant; A step of preparing an oil phase comprising silicone oil, a silicone crosspolymer, and a silicone polymer emulsifier; and A method for manufacturing a water-in-oil emulsion cosmetic comprising the step of mixing the aqueous phase and the oil phase, wherein the aqueous phase is prepared such that the vitamin C is included in an amount of 15 to 20 weight% with respect to the total composition, and the oil phase is prepared such that it includes 15 to 30 weight% silicone oil, 3 to 10 weight% silicone crosspolymer, and 0.5 to 2 weight% silicone polymer emulsifier. Method for manufacturing a water-in-oil emulsion cosmetic.
11. In Paragraph 10, The step of manufacturing the above-mentioned water part is A first aqueous solution containing vitamin C and polyol is prepared, and After preparing a second aqueous solution containing an antioxidant and a base, Characterized by mixing the first aqueous solution and the second aqueous solution. Method for manufacturing a water-in-oil emulsion cosmetic.

Description

Stabilized high-concentration vitamin C cosmetic composition and its preparing method The present invention relates to a stabilized high-concentration vitamin C cosmetic composition and a method for manufacturing the same, and more specifically, to a cosmetic composition in the form of a water-in-oil emulsion containing a high concentration of vitamin C and a method for manufacturing the same. Vitamin C is a water-soluble vitamin, also known as ascorbic acid. Most animals can synthesize vitamin C using glucose, but humans do not produce it in their bodies because they lack the enzyme required for the final step of vitamin C synthesis. Vitamin C not only helps synthesize collagen in tissues such as skin, bones, muscles, and blood vessels, but is also essential for the synthesis of cellular components like neurotransmitters, adrenal cortical hormones, hemoglobin, and bile acids. Vitamin C eliminates free radicals, the main culprits of aging, and plays an important role in immune functions such as antibacterial action, lymphocyte proliferation, and white blood cell protection. Vitamin C plays a significant role in maintaining skin health by protecting and restoring skin cells damaged by ultraviolet rays, offering not only anti-aging benefits but also tumor-suppressing effects. Furthermore, through its powerful antioxidant action, Vitamin C inhibits melanin synthesis and reduces oxidized melanin, thereby brightening the skin tone, minimizing moisture loss, and lowering skin sensitivity. In addition to these whitening effects, it helps maintain firm, smooth, and wrinkle-free skin. However, despite the positive effects mentioned above, Vitamin C is easily oxidized and decomposed by external environmental factors such as temperature, light, oxygen, and humidity, resulting in a decrease in potency. Vitamin C is converted into the oxidized form of DHA (Dehydroascorbic acid), during which its properties are lost. This oxidation process of Vitamin C is attributed to its characteristic of acting as an electron donor and easily losing electrons. As described above, in order to stabilize unstable vitamin C, research has been conducted from various angles, including methods using antioxidants (Registered Patent No. 10-1451401), methods using stabilizers (Published Patent No. 10-2004-0085825), coating methods (Published Patent No. 10-2002-0023813), methods using organic solvents in an aqueous phase (Registered Patent No. 10-1579964), and methods preparing in emulsion form (Registered Patent No. 10-1461121). However, when using antioxidants or stabilizers, the oxidation of vitamin C is not sufficiently inhibited, resulting in a decrease in potency; when dissolving vitamin C using organic solvents in an aqueous phase, it is impossible to produce high concentrations of vitamin C, and the skin sensation is very poor. The coating method has the problem of being unsuitable for use in cosmetics. When manufactured in the form of water-soluble emulsions or gels, it is possible to produce high amounts of vitamin C, but problems arise regarding the commercial viability of the product due to low formulation stability as a cosmetic composition, such as a decrease in vitamin C potency and an increase in viscosity during long-term storage. FIG. 1 is a process flowchart of a method for manufacturing a water-in-oil emulsion cosmetic according to one embodiment of the present invention. FIG. 2 is a schematic diagram of an oil-in-water emulsion according to one embodiment of the present invention. FIG. 3 shows a specific process of a method for manufacturing a water-in-oil emulsion cosmetic according to one embodiment of the present invention. Figure 4 shows a specific process of a method for manufacturing a silicon crosspolymer according to one embodiment of the present invention. Preferred embodiments according to the present invention will be described in detail below with reference to the attached drawings. The advantages and features of the present invention and the method for achieving them will become clear by referring to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited by the embodiments disclosed below but may be implemented in various different forms, and these embodiments are provided merely to make the disclosure of the present invention complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. In addition, in describing the present invention, if it is determined that related known technologies, etc., may obscure the essence of the present invention, a detailed explanation thereof will be omitted. The present invention will be described in detail below. Water-in-oil emulsion cosmetic composition A water-in-oil emulsion cosmetic composition is provided, comprising an aqueous phase containing vitamin C; and an oil phase containing silicone oil, a silicone c