KR102269199B1 - Multilayer cosmetic composition in which transparency is maintained - Google Patents

Abstract

It relates to a cosmetic composition having a multilayer structure in which transparency is maintained, and the cosmetic composition having a multilayer structure according to an aspect has the same appearance as the first time even when it is separated after shaking. Effect that each layer is completely transparently separated to maintain a consistent appearance There is an effect of improving the feeling of use, such as moisturizing power, because the aqueous layer is separated by descending, and the oil layer can be contained in a high content.

Description

Multilayer cosmetic composition in which transparency is maintained}

It relates to a cosmetic composition having a multi-layer structure in which transparency is maintained.

In the case of a two-face formulation that contains two layers of an aqueous layer and an oily layer in one formulation, if each color is applied to the aqueous layer and the oil layer, two colors can be applied to one product, which can differentiate the appearance, By shaking and mixing before use, consumers can create and use the dosage form themselves to give a participatory effect.

The existing two-face formulation used a surfactant or a thickener so that the aqueous layer and the oil layer could maintain a mixed state for a certain period of time (Korea Patent Publication No. 10-2018-0027900), but in this case, it was temporarily emulsified through repeated shaking and mixing. Formed to form an opaque appearance until each layer is separated, or even after separation, each layer is completely transparent and does not separate in the same shape as the first, so there is a problem that the quality of the product is deteriorated. In addition, since a large amount of oil cannot be contained for a transparent formulation, there is a problem in that the feeling of use such as moisturizing power is limited.

Therefore, it is possible to have a transparent appearance while containing a large amount of oil, and in particular, even when the two-phase formulation is shaken and mixed, it is possible to maintain the same appearance by maintaining the transparency, and there is a need to develop a formulation in which the two layers are reliably separated.

One aspect is an aqueous layer comprising a polyol; and an oil phase comprising a hydrocarbon-based oil, wherein a difference in specific gravity between the aqueous phase and the oil phase is 0.2 or more.

One aspect is an aqueous layer comprising a polyol; and an oil phase comprising a hydrocarbon-based oil, wherein a difference in specific gravity between the aqueous phase and the oil phase is 0.2 or more.

The “cosmetic composition having a multi-layer structure” may refer to a cosmetic composition in which two or more immiscible ingredients are formed, not a single-phase emulsion. The “multilayer structure” refers to a separation of an aqueous layer and an oil phase into two or more layers, and the number of layers and the order of the layers may be changed according to the composition of the cosmetic composition. For example, there may be two layers, and the aqueous layer may be in the lower layer and the oil phase may be in the upper layer.

The cosmetic composition of the multi-layer structure may be used by mixing the aqueous phase and the oil phase in a static state, but in a single phase by shaking during use. Because the ingredients of the upper and lower layers are mixed and used by shaking, it may be that the ingredients of each layer can be applied to the skin at the same time while giving the consumer participatory and visual fun. The composition may be to maintain an appropriate mixing time when shaken. Specifically, after shaking the composition, the lid may be opened to maintain an even mixing state until applied to the skin or for a longer period of time. For example, after shaking and mixing, the mixing state may be maintained for 3 to 30 minutes. The composition may return to its original state when left alone after mixing.

The composition may not include a thickener. The "does not contain" means "substantially free", and "substantially" herein means that up to 10% by mass of the total mass of the total cosmetic composition may be included. Also, this may mean that the thickener is included at a content level such that the composition does not become opaque. For example, the “free” or “substantially free” content may be 10 wt%, 8 wt%, 6 wt%, 4 wt%, or 2 wt% or less. The cosmetic of the present invention may not contain a thickener at all. The composition may be one that does not substantially contain a thickener, so that transparency is maintained when shaken.

The composition may be to facilitate mixing with the aqueous phase by adjusting the polarity of the oil phase to be similar to that of the aqueous phase. In this case, when the two layers are shaken and mixed, they can be mixed, but not emulsified, so it may be possible to maintain a transparent appearance. Specifically, it may be to show a uniform appearance by maintaining transparency until separated after shaking or even after separation. The polarity of the oil phase may vary depending on the type of oil used in the oil phase. The polarity of the oil phase may vary depending on the type of oil, such as hydrocarbon oil, alcohol oil, ester oil, plant-derived oil, or silicone oil. In addition, the degree of transparency or layer separation after mixing may vary depending on the composition of the oil of the oil phase. For example, hydrocarbon-based oil may exhibit the highest transparency. In one embodiment, the "hydrocarbon oil" may be a paraffinic hydrocarbon oil, an olefinic hydrocarbon oil, an aliphatic, alicyclic or aromatic hydrocarbon oil, for example, n-octane, n-nonane, n-decane , n-undecane, n-dodecane, n-tridecane, n-tetradecane, n-pentadecane, n-hexadecane, n-heptadecane, n-octadecane, paraffin, isoparaffin, squalane, squalene, It may be at least one selected from the group consisting of polybutene, polydecene, polyisoprene, hydrogenated polydecene, hydrogenated polyisobutene, hydrogenated poly(C6-14 olefin), and mineral oil.

The composition according to one aspect may contain a large amount of the oil while maintaining transparency. In one embodiment, the oil may be included in 50 to 90% by weight based on the total weight of the composition, for example, 50 to 80% by weight, 50 to 70% by weight, 50 to 60% by weight, 60 to 90% by weight, 60 to 80% by weight, 60 to 70% by weight, 70 to 90% by weight, 70 to 80% by weight, 80 to 90% by weight. When the oil content is less than 50% by weight, there is a problem in that the moisturizing power is lowered, and when it is more than 90% by weight, the composition may not be mixed well and it may be difficult to maintain a uniform appearance.

The composition may contain a small amount of an emulsifier within a range that does not substantially impair the effect desired by the present invention, in addition to controlling the polarity of the oil phase in order to maintain mixing of the aqueous phase and the oil phase for a predetermined time. Specifically, the composition may include an emulsifier to form a temporary emulsion, but may maintain transparency even when shaken and mixed with a hydrocarbon-based oil. In one embodiment, the oil phase layer may further include 1 to 5% by weight of a polyglyceryl-based emulsifier based on the total weight of the composition. For example, 1-4 wt%, 1-3 wt%, 1-2 wt%, 2-5 wt%, 2-4 wt%, 2-3 wt%, 3-5 wt%, 3-4 wt% %, 4 to 5% by weight. If the content of the emulsifier is less than 1% by weight, it may be difficult to mix the aqueous layer and the oil phase, and if it is more than 5% by weight, the emulsified form is maintained depending on repeated use, so it becomes opaque or the layers are not separated cleanly in the same state as the first time. may not be "Polyglyceryl-based emulsifier" according to an aspect may be polyglyceryl stearate, specifically, polyglyceryl-4 isostearate, polyglyceryl-6 monostearate, polyglyceryl-6 isostearate, Polyglyceryl-10 monostearate, polyglyceryl-10 monoisostearate, polyglyceryl-10 distearate, polyglyceryl-10 diisostearate, polyglyceryl-10 tristearate, polyglyceryl -10 may be at least one selected from the group consisting of decaisostearate, polyglyceryl-3 alkyl glucose monostearate, polyglyceryl-3 alkyl glucose distearate, and polyglyceryl-3 alkyl glucose tristearate. For example, it may be polyglyceryl-10 decaisostearate.

The composition may have a specific gravity difference of 0.2 or more between the aqueous phase and the oil phase. Specifically, the difference in specific gravity of the two layers may be 0.2 to 0.5, for example, 0.2 to 0.45, 0.2 to 0.4, 0.2 to 0.35, 0.2 to 0.3, 0.3 to 0.5, 0.3 to 0.45, 0.3 to 0.4, 0.3 to 0.35, 0.4 to 0.5, and can be easily selected by those skilled in the art within a range that does not impair the object and effect of the present invention. When the difference in specific gravity between the aqueous layer and the oil phase is less than 0.2, the separation rate of the two layers is reduced and the composition is not separated as cleanly as in the original state when the composition is shaken, or the oil phase having a relatively light specific gravity is separated while rising to the upper layer. When the difference in specific gravity between the aqueous layer and the oily layer is more than 0.5, the time for maintaining the mixed state is shortened, so that when applied to the skin, it is difficult to evenly apply the aqueous layer component and the oily layer component.

The difference in specific gravity between the two layers may be caused by increasing the content of the polyol to increase the specific gravity of the aqueous layer. In one embodiment, the polyol may be 20 to 30% by weight based on the total weight of the composition. For example, 20 to 28% by weight, 20 to 26% by weight, 20 to 24% by weight, 20 to 22% by weight, 22 to 30% by weight, 24 to 30% by weight, 26 to 30% by weight, 28 to 30% by weight It can be %. When the polyol content is less than 20% by weight, the difference in specific gravity between the aqueous layer and the oil phase may decrease to less than 0.2, and when the polyol content is more than 30% by weight, the difference in specific gravity between the aqueous layer and the oil phase increases to more than 0.5. can In one embodiment, the polyol may be at least one selected from the group consisting of glycerin, butylene glycol, dipropylene glycol, propanediol, glycereth-26, polyglycerin-3, and diglycerin.

In one embodiment, when the composition is separated after mixing of the aqueous phase and the oil phase due to the specific gravity difference, the aqueous phase may be separated by descending to the lower layer. The composition according to one aspect may generally be one that gives a differentiating appearance in the direction of separation opposite to that of the oily layer having a light specific gravity as it rises to the upper layer.

The multi-layered cosmetic composition according to an aspect has the same appearance as the first time when it is separated after shaking, and each layer is completely transparently separated to maintain a consistent appearance, and the aqueous layer is separated by descending, and the oil layer It has the effect of improving the feeling of use, such as moisturizing power, because it can be contained in a high content.

1 is a photograph comparing the layer separation aspects after shaking and mixing the multi-layered cosmetic compositions of Examples 1 to 4 and Comparative Examples 1 to 4;
2 is a photograph showing the lapse of time after shaking the multi-layered cosmetic composition of Example 1, and from the left, it corresponds to a photograph immediately after mixing, during separation, and upon completion of separation, respectively.

Hereinafter, the present invention will be described in more detail through examples. However, these examples are for illustrative purposes of the present invention, and the scope of the present invention is not limited to these examples.

The following [Table 1] shows the specific components and contents of the multi-layered cosmetic composition in which the series of oils used in the oil phase are different, and the specific manufacturing method is as follows.

ingredient content (wt%) Paid layer Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 oil series hydrocarbon type hydrocarbon type hydrocarbon type hydrocarbon type alcohol ester plant origin silicon mineral oil squalane Hydrogenated polyisobutene Hydrogenated Poly (C6-14 Olefin) Octyldodecanol dicaprylyl
carbonate Macadamia Seed Oil dimethicone oil 61.99 61.99 61.99 61.99 61.99 61.99 61.99 61.99 Polyglyceryl-10 Decaiisostearate 3 3 3 3 3 3 3 3 water floor Purified water 5 5 5 5 5 5 5 5 glycerin 20 20 20 20 20 20 20 20 Butylene Glycol 5 5 5 5 5 5 5 5 pigment 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 ethanol 5 5 5 5 5 5 5 5

Examples 1 to 4. Preparation of hydrocarbon-based oil-containing multi-layered cosmetic composition

An oil phase was prepared by mixing hydrocarbon-based oil and polyglyceryl-10 decaisostearate at room temperature with an easy mixer, and the aqueous phase was separately stirred and mixed and then mixed with the oil phase to obtain a final formulation. Examples 1 to 4 are, respectively, a synthetic hydrocarbon-based oil, mineral oil, a plant-derived hydrocarbon-based oil, squalane, a straight-chain, synthetic hydrocarbon-based oil, hydrogenated polyisobutene, and a branched structure, a synthetic hydrocarbon-based oil, hydrogene. It was prepared using Tidpoly (C6-14 olefin).

Comparative Examples 1 to 4. Preparation of multi-layered cosmetic composition containing alcohol, ester-based, plant-derived, and silicone-based oil

In Comparative Examples 1 to 4, an oil phase was prepared by mixing each oil of different series with a hydrocarbon oil and polyglyceryl-10 decaisostearate at room temperature with an easy mixer, and the aqueous phase was separately stirred and mixed, and then the oil phase mixed with the layers to obtain the final formulation. Comparative Examples 1 to 4 were prepared using octyldodecanol, which is an alcohol oil with high polarity, dicaprylyl carbonate, which is an ester-based oil, macadamia seed oil, which is a plant-derived oil, and dimethicone, which is a silicone oil.

Experimental Example 1. Specific Gravity Analysis

In order to compare the separation appearance according to the difference in specific gravity between the aqueous phase and the oil phase, the difference in specific gravity between the aqueous phase and the oil phase of the products of Examples 1 to 4 and Comparative Examples 1 to 4 and the conventional multi-layered formulation is measured, and each After shaking and mixing, the phenomenon of separation was observed.

As a result, the difference between the specific gravity of the aqueous layer (1.015) and the specific gravity of the oil layer (0.875) was about 0.140 in the existing multi-layered product (Carver Korea AHC Premium Hydra B5 7 Days Ampoule), but Examples 1 to 4 and comparison In Examples 1 to 4, the difference between the specific gravity of the aqueous layer (1.087) and the specific gravity of the oil layer (0.807) was increased to about 0.280. In addition, in the existing product, when the aqueous phase and the oil phase were shaken and mixed, the oil phase having a light specific gravity was separated while rising to the upper layer, but in Examples 1 to 4 and Comparative Examples 1 to 4 with a large difference in specific gravity, the specific gravity was The heavy aqueous layer was separated as it descended to the lower layer. This means that the cosmetic compositions of Examples 1 to 4 can differentiate their appearance in a separation direction different from that of the existing formulation.

Experimental Example 2. Confirmation of separability and transparency

In order to compare the layer separation pattern after mixing according to the oil type used for the oil phase, the multi-layered cosmetic compositions of Examples 1 to 4 and Comparative Examples 1 to 8 were shaken and mixed, and the layer separation and transparency were compared and observed. Each composition was shaken and the separation patterns after 5 minutes and 30 minutes were compared to determine whether transparency was maintained until separation and whether it was completely separated into two layers.

1 is a photograph comparing the layer separation aspects after shaking and mixing the multi-layered cosmetic compositions of Examples 1 to 4 and Comparative Examples 1 to 4; Table 2 below shows the results of whether or not the layers are separated and transparency after mixing each composition.

Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 oil series hydrocarbon type hydrocarbon type hydrocarbon type hydrocarbon type alcohol ester plant origin silicon mineral oil squalane Hydrogenated polyisobutene Hydrogenated Poly (C6-14 Olefin) Octyldodecanol dicaprylyl
carbonate Macadamia Seed Oil dimethicone Separation Separation Separation Separation Separation not separated not separated not separated not separated transparency Transparency Transparency translucent Transparency opacity opacity opacity opacity

As a result, as shown in FIGS. 1 and 2, Examples 1 to 4 using hydrocarbon-based oil maintained transparency even when shaking, and it was confirmed that the layers were completely transparent and clean as in the initial state after 30 minutes. . However, Comparative Examples 1 to 4 using alcohol, ester-based, plant-derived, and silicone-based oils exhibited an opaque appearance until each layer was separated after shaking, or the layers were not completely separated even after 30 minutes.

In general, when a surfactant is used for mixing the oil phase and the aqueous phase, it has an opaque appearance because it creates a temporary emulsified form in the mixed state. However, it can be seen that if a method of increasing the polarity of the oil phase layer for mixing is used as in Examples 1 to 4, it is possible to maintain a transparent appearance until the mixture is mixed but emulsification does not occur and thus is separated. In particular, in controlling the polarity of the oil phase, using a hydrocarbon-based oil means that it can exhibit an excellent effect in terms of transparency and separability than using an alcohol, ester-based, plant-derived, or silicone-based oil. . In addition, it can be seen from the results of Examples 1 to 4 that the hydrocarbon-based oil has excellent transparency and separability regardless of whether it is synthesized or has a structure.

Claims (8)

an aqueous layer comprising a polyol; and
A cosmetic composition having a layered structure comprising an oil phase comprising a hydrocarbon-based oil and a polyglyceryl-based emulsifier, wherein the difference in specific gravity between the aqueous layer and the oil phase is 0.2 to 0.5,
The hydrocarbon-based oil is at least one selected from the group consisting of squalane, hydrogenated poly (C6-14 olefin), and mineral oil. A cosmetic composition having a layered structure. The composition of claim 1, wherein the polyol is 20 to 30% by weight based on the total weight of the composition. The composition of claim 1, wherein the polyol is at least one selected from the group consisting of glycerin, butylene glycol, dipropylene glycol, propanediol, glycereth-26, polyglycerin-3, and diglycerin. The composition of claim 1, wherein the polyglyceryl-based emulsifier is included in an amount of 1 to 5% by weight based on the total weight of the composition. The composition of claim 1, wherein the hydrocarbon-based oil is included in an amount of 50 to 90% by weight based on the total weight of the composition. delete The composition according to claim 1, wherein the aqueous phase is separated by descending to the lower layer when the composition is separated after mixing the aqueous phase and the oil phase. The method according to claim 1, wherein the polyglyceryl-based emulsifier is polyglyceryl-4 isostearate, polyglyceryl-6 monostearate, polyglyceryl-6 isostearate, polyglyceryl-10 monostearate, polyglyceryl -10 monoisostearate, polyglyceryl-10 distearate, polyglyceryl-10 diisostearate, polyglyceryl-10 tristearate, polyglyceryl-10 decaisostearate, polyglyceryl-3 A composition that is at least one selected from the group consisting of alkyl glucose monostearate, polyglyceryl-3 alkyl glucose distearate, and polyglyceryl-3 alkyl glucose tristearate.

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