High-efficacy multi-layered composition containing high-density hydrophobic mono-aggregate

Abstract

The present invention relates to a multi-layered cosmetic composition comprising an active ingredient in an aqueous phase part and forming an oil ball at the lower end part thereof, wherein trimethylpentaphenyltrisiloxane is contained in an oil phase part, thereby providing a formulation in which an oil ball is formed at the lower end part by utilizing different physical properties of the aqueous phase part and the oil phase part.

Description

High-efficiency multilayer composition containing high-density hydrophobic monoagglomerates

[0001] This patent application claims priority to Korean Patent Application No. 10-2025-0005879 filed with the Korean Intellectual Property Office on January 15, 2025, the disclosures of said patent application are incorporated herein by reference.

[0002] The present invention relates to a multilayer cosmetic composition comprising an active ingredient in an aqueous phase and forming an oil ball in a lower phase, and more specifically, to a cosmetic composition comprising an oil phase comprising a non-polar oil having a phenyl group and forming an oil ball in a lower phase, and an aqueous phase comprising an active ingredient.

[0003] In cosmetics, multilayer formulations generally consist of a combination of two or more phases with different physical and chemical properties, typically comprising a water phase and an oil phase. Multilayer structures are gaining attention in the fields of premium and functional cosmetics because they offer the advantages of stable separation and storage of active ingredients, along with visually unique designs.

[0004] However, existing multilayer cosmetic compositions have various technical problems. A typical issue is that if the difference in specific gravity between the oil and water phases is insufficient, phase separation becomes unstable, causing the layers to easily collapse. In particular, oil phase components with insufficient density found it difficult to form a clear boundary with the water phase due to their own low specific gravity.

[0005] Furthermore, there are difficulties in stabilizing oil-based formulations. Oil components used in existing technologies often failed to stably contain active ingredients effective for the skin. In particular, while non-polar silicones offer excellent spreadability and protective effects, they presented problems such as unclear layer separation or low interfacial stability during the mixing process with the aqueous phase.

[0006] Finally, there are limitations in the mixing and distribution of active ingredients. Conventional cosmetic compositions have struggled to properly arrange active ingredients, such as vitamins, antioxidants, and skin improvers, between the aqueous and oil phases. This leads to mutual interference between ingredients within the composition and reduced stability, acting as an obstacle to optimizing efficacy. Therefore, there is a need for a new approach in multilayer cosmetic composition technology that can incorporate various active ingredients while maintaining a stable and aesthetically pleasing layered structure.

[0007] The inventors have invented a multilayer cosmetic composition containing a large amount of non-polar silicone components to overcome the limitations of existing technology and to provide a product in which oil balls are formed at the bottom even when the specific gravity of the aqueous phase increases due to the inclusion of specific active ingredients.

[0008] The present invention relates to a multilayer cosmetic composition comprising an active ingredient in the aqueous phase and forming an oil ball in the lower phase.

[0009] The present invention provides a formulation in which trimethylpentaphenyltrisiloxane is contained in the oil phase, and an oil ball is formed in the lower portion by utilizing the different physical properties of the aqueous and oil phases.

[0010] The present invention will be described in more detail below.

[0011] Throughout this specification, materials, methods, and embodiments are merely illustrative and do not limit the invention. Descriptions of specific terms are provided to enable the practice of various embodiments of the invention.

[0012] One aspect of the present invention is a cosmetic composition comprising an oil phase comprising a non-polar oil having a phenyl group; and an aqueous phase, wherein

[0013] The above oil phase has a specific gravity of 1 to 1.5 and relates to a cosmetic composition located in the form of a ball at the bottom.

[0014] The above ball shape includes spheres and ellipsoids having a cross-sectional area of ​​a circle or an ellipse. In this case, the shape of the ball may change, such as by being distorted depending on the material or shape of the container, but basically, the ball shape is not limited as long as it can have a sphere or an ellipse.

[0015] In the present invention, the non-polar oil having a phenyl group may include a silicone oil having three or more phenyl groups, but is not limited thereto.

[0016] In the present invention, the oil may be trimethyl pentaphenyl trisiloxane, but is not limited thereto.

[0017] In the present invention, the trimethylpentaphenyltrisiloxane may be included in an amount of 50 to 100 weight%, 55 to 100 weight%, or 60 to 100 weight% based on the oil phase, and

[0018] It may contain 4 to 30 weight%, 6 to 30 weight%, or 8 to 30 weight% based on the total cosmetic composition, but is not limited thereto.

[0019] In the present invention, the trimethylpentaphenyltrisiloxane is a phenylated silicon compound that includes a methyl group and a phenyl group and is hydrophobic.

[0020] In the present invention, the specific gravity of the oil phase may be higher than the specific gravity of the aqueous phase. The specific gravity of the oil phase can be adjusted by controlling the composition ratio of the trimethylpentaphenyltrisiloxane and the diphenyldimethicone.

[0021] In the present invention, the weight ratio of the oil phase and the water phase may be 3 to 60:40 to 97, 10 to 60:40 to 90, 15 to 60:40 to 85, 3 to 50:50 to 97, 10 to 50:50 to 90, 15 to 50:50 to 85, 3 to 40:60 to 97, 10 to 40:60 to 90, 15 to 40:60 to 85, 3 to 30:70 to 97, 10 to 30:70 to 90, 15 to 30:70 to 85, for example, 20:80, but is not limited thereto.

[0022] In the present invention, the oil phase may further include diphenyldimethicone, but is not limited thereto.

[0023] In the present invention, the oil phase comprises an amount greater than 1 and less than or equal to 1.5, greater than 1 and less than or equal to 1.4, greater than 1 and less than or equal to 1.3, greater than 1 and less than or equal to 1.2, greater than 1 and less than or equal to 1.15, greater than 1 and less than or equal to 1.14, greater than 1 and less than or equal to 1.13, greater than 1 and less than or equal to 1.12, 1.01 to 1.5, 1.01 to 1.4, 1.01 to 1.3, 1.01 to 1.2, 1.01 to 1.15, 1.01 to 1.14, 1.01 to 1.13, 1.01 to 1.12, 1.02 to 1.5, 1.02 to 1.4, 1.02 to 1.3, 1.02 to 1.2, 1.02 to 1.15, 1.02 to 1.14, 1.02 to 1.13, 1.02 to 1.12,

[0024] It may have a specific gravity greater than 1 and less than or equal to 1.1, 1.015 to 1.1, 1.02 to 1.1, 1.025 to 1.1, 1.03 to 1.1, 1.035 to 1.1, 1.04 to 1.1, 1.045 to 1.1, 1.05 to 1.1, 1.055 to 1.1, or 1.06 to 1.1, but is not limited thereto.

[0025] In the present invention, the aqueous portion comprises 0.9 to 1.1, 0.92 to 1.1, 0.95 to 1.1, 0.98 to 1.1, 1 to 1.1, 0.9 to 1.06, 0.92 to 1.06, 0.95 to 1.06, 0.98 to 1.06, 1 to 1.06, 1.005 to 1.06, 1.008 to 1.06, 1.01 to 1.06, 1.012 to 1.06, 1.015 to 1.06, 1.02 to 1.06, 1.025 to 1.06, 1.03 to 1.06, 1.035 to 1.06, 1.04 to 1.06, and 1.045 It may have a specific gravity of up to 1.06, 1.05 to 1.06, for example 1.056, but is not limited thereto.

[0026] In the present invention, the aqueous phase may include a salt, and as an example of the salt, it may include one or more of sodium chloride and sodium PCA, but is not limited thereto.

[0027] In the present invention, the salt may be included in an amount of 0.01 to 2 wt%, 0.1 to 2 wt%, 0.2 to 2 wt%, 0.3 to 2 wt%, 0.35 to 2 wt%, 0.4 to 2 wt%, 0.45 to 2 wt%, 0.5 to 2 wt%, 0.3 to 1.5 wt%, 0.35 to 1.5 wt%, 0.4 to 1.5 wt%, 0.45 to 1.5 wt%, 0.5 to 1.5 wt%, for example, 0.5 wt% or 1 wt% based on the aqueous phase.

[0028] Based on the total cosmetic composition, it may include 0.008 to 1.6 wt%, 0.08 to 1.6 wt%, 0.24 to 1.6 wt%, 0.28 to 1.6 wt%, 0.32 to 1.6 wt%, 0.36 to 1.6 wt%, 0.4 to 1.6 wt%, 0.008 to 1.2 wt%, 0.08 to 1.2 wt%, 0.24 to 1.2 wt%, 0.28 to 1.2 wt%, 0.32 to 1.2 wt%, 0.36 to 1.2 wt%, and 0.4 to 1.2 wt%, but is not limited thereto.

[0029] In the present invention, the aqueous phase may comprise one or more active ingredients selected from the group consisting of niacinamide, alpha-arbutin, ascorbic acid, tromethamine, sodium hyaluronate, glycerin, sodium pyridoxide, propylene glycol, azelaic acid, and tranexamic acid, but is not limited thereto.

[0030] The cosmetic composition according to the present invention may include various active ingredients depending on the product characteristics, and may include an active ingredient in the oil phase.

[0031] The term "active ingredient" in this specification is used with the same meaning as "efficacy ingredient."

[0032] In the present invention, the active ingredient may be included in an amount of 0.1 to 30 wt%, 0.3 to 30 wt%, 0.5 to 30 wt%, 1 to 30 wt%, 1.5 to 30 wt%, 2 to 30 wt%, 0.1 to 25 wt%, 0.3 to 25 wt%, 0.5 to 25 wt%, 1 to 25 wt%, 1.5 to 25 wt%, 2 to 25 wt%, for example, 1 wt%, 2 wt%, or 20 wt% based on the aqueous phase.

[0033] Based on the total cosmetic composition, it may contain 0.08 to 24 wt%, 0.24 to 24 wt%, 0.4 to 24 wt%, 0.8 to 24 wt%, 1.2 to 24 wt%, 1.6 to 24 wt%, 0.08 to 20 wt%, 0.24 to 20 wt%, 0.4 to 20 wt%, 0.8 to 20 wt%, 1.2 to 20 wt%, 1.6 to 20 wt%, for example, 0.8 wt%, 1.6 wt%, or 16 wt%, but is not limited thereto.

[0034] In the present invention, the cosmetic composition may further include one or more selected from the group consisting of moisturizers, pH adjusters, chelating agents, preservatives, antioxidant adjuvants, emulsifying stabilizers, and pigments, but is not limited thereto.

[0035] In the present invention, the cosmetic composition may be a liquid cosmetic composition, but is not limited thereto.

[0036] Another aspect of the present invention may be a cosmetic product comprising the cosmetic composition of the present invention. In this case, the container may be glass, but is not limited thereto.

[0037] Another aspect of the present invention relates to a method for manufacturing the cosmetic composition.

[0038] Another aspect of the present invention relates to a skin makeup method comprising the following steps:

[0039] A step of applying the cosmetic composition according to the present invention to the skin.

[0040] In the present invention, the pH of the aqueous phase water is not limited.

[0041] The present invention relates to a multilayer cosmetic composition comprising an active ingredient in the aqueous phase and forming an oil ball in the lower phase, wherein the oil phase contains trimethylpentaphenyltrisiloxane, and provides a formulation in which an oil ball is formed in the lower phase by utilizing the different physical properties of the aqueous and oil phases.

[0042] Figure 1 is the result of confirming the oil ball formation pattern according to the change in the composition content of the oil phase.

[0043] Figure 2 is the result of confirming the oil ball formation method according to the change in the type of oil phase component.

[0044] Figure 3 is the result of confirming the oil ball formation pattern according to the change in the active ingredient of the aqueous phase.

[0045] Figure 4 shows the results confirming the skin gloss improvement efficacy before and after application of the composition of Example 1 (Left: Before use, Right: After use).

[0046] Figure 5 shows the results confirming the skin brightness improvement efficacy before and after application of the composition of Example 1 (Left: Before use, Right: After use).

[0047] Figure 6 is the result of confirming the skin moisture improvement efficacy before and after application of the composition of Example 1.

[0048] A cosmetic composition comprising an oil phase including a non-polar oil having a phenyl group; and an aqueous phase, wherein the oil phase has a specific gravity of 1 to 1.5 and is positioned in a ball shape at the bottom.

[0049] 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.

[0050] 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.

[0051] The present invention will be explained in detail below through experimental examples.

[0052]

[0053] Experimental Example 1. Confirmation of oil ball formation according to specific gravity of the oil phase

[0054] Compositions of examples and comparative examples, each consisting of an oil phase and an aqueous phase, were prepared. The constituent components were mixed to be prepared separately as an aqueous phase and an oil phase, respectively, and cosmetic compositions were prepared by filling each into a container with a mass ratio (weight ratio) of 8:2 between the aqueous phase and the oil phase. In the finished cosmetic compositions, the aqueous phase used the same composition. The composition of the oil phase is shown in Table 1, the composition of the aqueous phase is shown in Table 2, and the composition of the finished compositions of the examples and comparative examples is shown in Table 3.

[0055] Topical Classification | Component Name | Content (Weight%) Example 1 | Example 2 | Example 3 | Comparative Example 1 | Comparative Example 2 Oil | Topical Silicon | Trimethylpentaphenyltrisiloxane | To 100 | To 100 | To 100 | To 1000 | Diphenyldimethicone | 0.20 | 50 | 80 | 100 Pigment | Nasturtium extract | Indian neem leaf extract | Drumstick seed oil | 0.08 | 0.08 | 0.08 | 0.08 | 0.08

[0056] Phase Classification Ingredient Name Content (Weight%) Aqueous Purifier Modifying Agent Water To 100 Active Ingredient Niacinamide 20 pH Regulator Citric Acid 0.02 pH Regulator Sodium Citrate 0.01 Preservative 1,2-Hexanediol 6 Sodium Chloride 0.5

[0057] Phase Classification | Component Identification | Content (Weight%) Example 1 | Example 2 | Example 3 | Comparative Example 1 | Comparative Example 2 Oil Phase | Silicon | Trimethylpentaphenyl trisiloxane 19.984 | 15.984 | 9.984 | 3.984 Diphenyl dimethicone 0.4 | 10 | 16 | 19.98 Pigment | Nasturtium extract | Indian neem leaf extract | Drumstick seed oil 0.016 | 0.016 | 0.016 | 0.016 | 0.016 Aqueous Phase | Unpurified Agent | Purifying Agent | 58.704 | 58.704 | 58.704 | 58 .70458.704 Active Ingredient: Niacinamide 1616161616 pH Regulator: Citric Acid 0.0160.0160.0160.0160.016 pH Regulator: Sodium Citrate 0.080.080.080.080.08 Preservative: 1,2-Hexanediol 4.84.84.84.84.8 Sodium Chloride 0.40.40.40.40.4

[0058] The specific gravity of the common aqueous phase and each oil phase of the compositions of the examples and comparative examples is shown in Table 4 below. The results of completing the cosmetic composition by filling the prepared aqueous and oil phase compositions into a glass container are shown in Figure 1.

[0059] Classification Specific Gravity Common Water Phase 1.052 Oil Phase of Example 1 1.096 Oil Phase of Example 2 1.081 Oil Phase of Example 3 1.059 Oil Phase of Comparative Example 1 1.0447 Oil Phase of Comparative Example 2 1.0243

[0060] As a result, when the specific gravity of the oil phase was higher than that of the water phase, the oil phase was located at the bottom and oil balls were formed. The higher the content of trimethylpentaphenyltrisiloxane in the oil phase, the higher the specific gravity became, and while oil balls were confirmed in Examples 1 to 3, no oil balls appeared in the comparative example.

[0061]

[0062] Experimental Example 2. Confirmation of oil ball formation according to oil phase composition

[0063] A comparative example composition was prepared by changing the components of the oil phase in Example 1, and the composition is shown in Table 5.

[0064] Phase Classification | Ingredient Name | Content (Weight%) Example 1 | Comparative Example 3 Oil Phase | Silicon | Trimethylpentaphenyl trisiloxane 19.98 | 40 Acetyl triethyl citrate 0.19.98 | 40 Pigment | Nasturtium officinale extract | Indian neem leaf extract | Drumstick seed oil 0.016 | 0.08 Aqueous Phase | Purification agent | Purification agent | Water 58.704 | 58.704 Active ingredient | Niacinamide 16 | 16 pH regulator | Citric acid 0.016 | 0.016 pH regulator | Sodium citrate 0.08 | 0.08 Preservative | 1,2-Hexanediol 4.8 | 4.8 Sodium chloride 0.4 | 0.4

[0065] Figure 2 shows the results of completing a cosmetic composition by filling the aqueous phase and oil phase compositions into a glass container. As a result, in the case of Comparative Example 3 composition using acetyltriethyl citrate, a polar solvent, the oil formed a flat shape at the bottom because there was not a significant difference in the cohesiveness of the oil itself and compatibility with the container. In contrast, in the case of Example 1 composition, a spherical shape was formed due to the strong self-cohesiveness and the influence of specific gravity by using a non-polar oil having a phenyl group.

[0066]

[0067] Experimental Example 3. Confirmation of oil ball formation according to the composition of active ingredients in the aqueous phase

[0068] Example compositions were prepared by varying the composition of the active ingredients in the aqueous phase, and the compositions are shown in Table 6.

[0069] Phase Classification | Ingredient Name | Content (Weight%) Example 1 | Example 4 | Example 5 | Example 6 Oil Phase | Silicon | Trimethylpentaphenyl Trisiloxane | 19.984 | 19.984 | 19.984 Pigment | Nasturtium extract | Indian neem leaf extract | Drumstick seed oil | 0.016 | 0.016 | 0.016 | 0.016 Aqueous Phase | Refining Agent | Refining Agent | 58.704 | 73.904 | 72.304 | 72.704 Active Ingredient | Niacinamide 16 | Alpha-Al Butin 0.8, Ascorbic Acid 1.6, Tromethamine 0.8, Sodium Hyaluronate 0.4, Glycerin 1.6, pH Adjuster Citric Acid 0.016, 0.016, 0.016, 0.016, pH Adjuster Sodium Citrate 0.08, 0.08, 0.08, 0.08, 0.08, Preservative 1,2-Hexanediol 4.8, 4.8, 4.8, 4.8, 4.8, Sodium Chloride 0.4, 0.4, 0.4, 0.4, 0.4

[0070] The specific gravity of each aqueous phase of the example composition is shown in Table 7 below. The results of completing the cosmetic composition by filling the prepared aqueous and oil phase compositions into a glass container are shown in Figure 3.

[0071] Classification Specific Gravity Common Oil Phase 1.096 Water Phase of Example 1 1.052 Water Phase of Example 4 1.0066 Water Phase of Example 5 1.013 Water Phase of Example 6 1.0108

[0072] As a result, even when there was a significant difference in specific gravity between the aqueous and oil phases, a flat but spherical oil phase was formed at the bottom.

[0073]

[0074] Experimental Example 4. Verification of aggregation time according to aqueous phase composition

[0075] Examples and comparative example compositions were prepared by varying the composition and content of the aqueous phase, and their compositions are shown in Table 8.

[0076] Phase Classification | Ingredient Name | Content (Weight%) Example 1 | Example 7 | Comparative Example 4 | Comparative Example 5 Oil Phase | Silicon | Trimethylpentaphenyl Trisiloxane 19.984 | 19.984 | 19.984 | 19.984 Pigment | Nasturtium extract | Indian neem leaf extract | Drumstick seed oil 0.016 | 0.016 | 0.016 | 0.016 Aqueous Phase | Purification agent | Purification agent | 58.704 Active Ingredient | Niacinamide 16 | 16 | 16 | 16 pH Regulator | Citric acid 0.016 | 0.016 | 0.016 | 0.016 pH Regulator | Sodium citrate 0.08 | 0.08 | 0.08 Preservative | 1,2-Hexanediol 4.8 | 4.8 | 4.8 Sodium chloride 0.4 | 0.8 | 0.2 Sodium PCA 0.8

[0077] The prepared aqueous and oil phase compositions were filled into a glass container to complete the cosmetic composition, and the time for the oil balls to aggregate was measured and the results are shown in Table 9.

[0078] Classification Oil Ball Formation Time Example 13 minutes 31 seconds Example 75 minutes 18 seconds Comparative Example 49 minutes 19 seconds Comparative Example 53 minutes 10 seconds

[0079] As a result, while the overall cohesion was excellent across all results, it was confirmed that oil balls aggregated faster as the sodium chloride content increased, and that faster aggregation was possible when using sodium chloride compared to sodium PCA.

[0080]

[0081] Experimental Example 5. Confirmation of efficacy based on the inclusion of active ingredients

[0082] The composition of Example 1 containing niacinamide as an active ingredient was applied to a test area to confirm the effects of improving shine, brightness, and skin moisture.

[0083] The efficacy of improving skin radiance was evaluated on one adult. Before the test, the test area was washed with Ivory soap and left in a constant temperature and humidity room (22±2℃, 40~60 RH, relative humidity) for 10 minutes, after which the gloss value (AU) of the test area was measured. The composition of Example 1 was applied to the test area (face), and the gloss value was measured again. The rate of change in gloss value before and after the application of the composition was calculated, and the results are shown in Fig. 4.

[0084] The efficacy of immediate skin brightness improvement was evaluated on one adult. Before the test, the test area was washed with Ivory soap and waited in a constant temperature and humidity room (22±2℃, 40~60 RH, relative humidity) for 10 minutes, after which the brightness (L value) of the test area was measured. The composition of Example 1 was applied to the test area (face), and the brightness was measured again. The rate of change in brightness values ​​before and after the application of the composition was calculated, and the results are shown in Fig. 5.

[0085] The efficacy of improving skin moisture was evaluated on one adult. Before the test, the test area was washed with Ivory soap and waited in a constant temperature and humidity room (22±2℃, 40~60 RH, relative humidity) for 10 minutes, after which the moisture level (AU) of the test area was measured. The composition of Example 1 was applied to the test area (face), and the moisture level was measured again. The rate of change in moisture level before and after the application of the composition was calculated, and the results are shown in Fig. 6.

[0086] As a result, it was confirmed that compared to before using the composition of Example 1, the gloss value of the test area increased by 14.8%, the brightness increased by 2.1%, and the skin moisture increased by 345.5% after use.

[0087] The scope of protection of the present invention is not limited to the description of the embodiments explicitly explained above. Furthermore, the scope of protection of the present invention cannot be limited by obvious modifications or substitutions in the technical field to which the present invention belongs.

[0088] The present invention relates to a multilayer cosmetic composition comprising an active ingredient in the aqueous phase and forming an oil ball in the lower phase, wherein the oil phase contains trimethylpentaphenyltrisiloxane, and provides a formulation in which an oil ball is formed in the lower phase by utilizing the different physical properties of the aqueous and oil phases.

Claims

1. A cosmetic composition comprising an oil phase comprising a non-polar oil having a phenyl group; and an aqueous phase, wherein A cosmetic composition having a specific gravity of 1 to 1.5 and positioned in a ball shape at the bottom.

2. In Paragraph 1, A cosmetic composition wherein the non-polar oil having a phenyl group comprises a silicone oil having three or more phenyl groups.

3. In Paragraph 1, A cosmetic composition in which the above oil is trimethyl pentaphenyl trisiloxane.

4. In Paragraph 3, A cosmetic composition comprising 50 to 100 weight percent of the trimethylpentaphenyltrisiloxane based on the oil phase.

5. In Paragraph 1, A cosmetic composition in which the specific gravity of the oil phase is higher than the specific gravity of the aqueous phase.

6. In Paragraph 1, A cosmetic composition having a weight ratio of 10 to 30:70 to 90 for the oil phase and the water phase.

7. In Paragraph 1, A cosmetic composition in which the above oil phase further comprises diphenyldimethicone.

8. In Paragraph 1, A cosmetic composition in which the above aqueous portion contains a salt.

9. In Paragraph 8, A cosmetic composition in which the above salt is included in an amount of 0.01 to 2 weight percent based on the above aqueous portion.

10. In Paragraph 1, A cosmetic composition wherein the above aqueous phase comprises one or more active ingredients selected from the group consisting of niacinamide, alpha-arbutin, ascorbic acid, sodium hyaluronate, azelaic acid, and tranexamic acid.

11. In Paragraph 1, The above cosmetic composition further comprises one or more selected from the group consisting of moisturizers, pH adjusters, chelating agents, preservatives, antioxidant adjuvants, emulsifying stabilizers, and pigments.

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