KR-20260065265-A - EMULSION COSMETIC COMPOSITION COMPRISING ANIONIC EMULSIFIER AND HAVING MOISTURIZING AND SHINING EFFECT

Abstract

The present invention relates to an oil-in-water (O/W) cosmetic composition with improved emulsion stability by including an anionic emulsifier. The present invention provides the effect of significantly improving emulsion stability in oil-in-water formulations containing high content of oil or active ingredients by adding an anionic emulsifier to overcome the limitations of existing nonionic emulsifiers.

Inventors

• 황수진
• 박현정
• 지진구
• 박천호

Assignees

• 코스맥스 주식회사

Dates

Publication Date

20260508

Application Date

20241101

Claims (9)

1. premier; Oil phase containing oil; and Water-in-water (O/W) cosmetic composition containing an anionic emulsifier.
2. In paragraph 1, An oil-in-water (O/W) cosmetic composition comprising one or more selected from the group consisting of sodium stearoyl glutamate, sodium dilauramidoglutamide lysine, potassium cetyl phosphate, C20-22 alkyl phosphate, and C20-22 alcohols.
3. In paragraph 1, An oil-in-water (O/W) cosmetic composition in which the above-mentioned anionic emulsifier is included in an amount of 0.05 to 1 weight percent relative to the total composition.
4. In paragraph 1, An oil-in-water (O/W) cosmetic composition comprising one or more selected from the group consisting of nonionic emulsifiers, neutralizing agents, and chelating agents.
5. In paragraph 1, An oil-in-water (O/W) cosmetic composition wherein the above aqueous phase further comprises one or more selected from the group consisting of polyols, salts, and acids.
6. In paragraph 1, An oil-in-water (O/W) cosmetic composition in which the above oil is included in an amount of 10 to 40 weight percent relative to the total composition.
7. In paragraph 1, An oil-in-water (O/W) cosmetic composition wherein the above oil phase further comprises one or more selected from the group consisting of nonionic emulsifiers, emulsion stabilizers, and oil-soluble acids.
8. In paragraph 1, The above cosmetic composition is an oil-in-water (O/W) cosmetic composition that further comprises one or more selected from the group consisting of purified water, thickeners, preservatives, preservatives, and colorants.
9. In paragraph 1, The above cosmetic composition is an oil-in-water (O/W) cosmetic composition, wherein the cosmetic composition is an emulsion cosmetic composition.

Description

Water-in-oil type emulsion cosmetic composition comprising an anionic emulsifier and having moisturizing and shining effects The present invention relates to an oil-in-water (O/W) cosmetic composition containing an anionic emulsifier, and more specifically, to a cosmetic composition in which emulsion stability is improved by applying an anionic emulsifier while containing a high amount of oil. In general, in cosmetics, an oil-in-water (O/W) formulation refers to a formulation in which oil components are finely dispersed within an aqueous phase. For cosmetics with this formulation, it is essential to include a high concentration of oil to provide a rich, nourishing sensation and maximize gloss. When incorporating high oil content, non-ionic emulsifiers and wax components are primarily used. While non-ionic emulsifiers are effective for stably binding oil and water phases due to their non-charged nature, they can present several significant challenges. First, they may result in a stiff texture upon application to the skin, which can degrade usability and gloss. This is because when non-ionic emulsifiers and waxes are combined, the two components interact to reduce the fluidity of the formulation. Since non-ionic emulsifiers cannot utilize electrical attraction during the emulsification process, they fail to maintain sufficient distance between emulsion particles; furthermore, the addition of wax makes the formulation even more viscous, making it difficult to achieve a smooth, spreading sensation. Second, nonionic emulsifiers have inherent limitations in their emulsifying power, making them unable to sufficiently emulsify high-concentration oils and causing the emulsion particles to coalesce over time. This can lead to formulation separation or abnormalities in appearance during long-term storage. Due to these problems, there is a need to develop cosmetic compositions that can improve emulsion stability, moisturizing effect, and gloss in cosmetic compositions containing a high amount of oil. Figure 1 is the result of comparing emulsion stability according to whether an anionic emulsifier is included in a high-oil-content composition. Figure 2 is the result of comparing emulsion stability according to whether an anionic emulsifier is included in a composition containing an active ingredient. Figure 3 shows the results of confirming the moisturizing improvement effect depending on whether an anionic emulsifier is included. Figure 4 shows the results of confirming the skin gloss improvement effect depending on whether an anionic emulsifier is included. Throughout this specification, when a part is described as "comprising" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Additionally, where numerical ranges are disclosed in this specification, such ranges are continuous and, unless otherwise specified, include all values from the minimum value of such range up to the maximum value including the maximum value. Throughout this specification, "%" used to indicate the concentration of a particular substance is (weight/weight)% for solid/solid, (weight/volume)% for solid/liquid, and (volume/volume)% for liquid/liquid, unless otherwise noted. Furthermore, the term “or” in this specification is intended to mean an implied “or” rather than an exclusive “or.” That is, where the combination or use of the configurations is not otherwise specified or is not evident from the context, i.e., where X includes A; where X includes B; or where X includes both A and B, “X includes A or B” may be applied to either of these cases. The present invention will be explained in detail below through experimental examples. If the emulsifying power of a cosmetic composition (e.g., an emulsion) decreases, the oil may not be evenly dispersed, causing it to clump into large particles in water and resulting in a clear appearance. This is a sign that the emulsion is unstable, which may lead to the separation of the formulation or a deterioration in usability. Therefore, the objective of the present invention may be to maintain the size of the emulsion particles small to create a stable state in which the appearance of the composition does not become clear. Experimental Example 1. Results of a comparative experiment on emulsion stability of a composition containing high oil content and anionic emulsifier When an oil-in-water type cosmetic composition contains a large amount of oil, the formulation may not be formed properly, or the stability of the formulation may decrease as emulsion particles coalesce. To solve the above-mentioned problems, an experiment was conducted to determine whether emulsion stability is improved when an anionic emulsifier is applied to a composition containing a high amount of oil. 1-1. Preparation of a cosmetic composition containing a high oil content Compositions of Examples 1 to 3 and Comparative Example 1 containing