Oil-in-Water-in-Oil Type Cosmetic Composition

Abstract

The present invention relates to a cosmetic composition of the oil-in-water type, and more specifically, to a cosmetic composition of the oil-in-water type having excellent formulation stability and excellent oxidation stability by including a silicone-based emulsifier comprising lauryl dimethicone / polyglycerin-3 crosspolymer in the outer phase and potassium ascorbyl tocopheryl phosphate without a separate emulsifier in the inner phase.

Description

Technology Field

[0001] The present invention relates to a cosmetic composition of the oil-in-water type, and more specifically, to a cosmetic composition of the oil-in-water type having excellent formulation stability and excellent oxidation stability by including a silicone-based emulsifier comprising lauryl dimethicone / polyglycerin-3 crosspolymer in the outer phase and potassium ascorbyl tocopheryl phosphate without a separate emulsifier in the inner phase. Background Technology

[0002] Generally, among cosmetic compositions, an emulsion formulation refers to a structure in which an oil phase and a water phase are stably mixed using an appropriate emulsifier. Representative examples of such emulsions include oil-in-water (O / W) type, water-in-oil (W / O) type, and multiple emulsions composed of complex structures thereof. Among these, the oil-in-water-in-oil (O / W / O) type emulsion is a high-performance complex structure formed by a two-step emulsification process, consisting of an internal phase with a W / O structure dispersed within an external phase (Oil), and has recently been receiving high interest in the cosmetics industry.

[0003] Accordingly, the inventors prepared a cosmetic composition of the oil-in-water type by including a silicone-based emulsifier comprising lauryl dimethicone / polyglycerin-3 crosspolymer in the outer phase and potassium ascorbyl tocopheryl phosphate without a separate emulsifier in the inner phase, and confirmed that this has excellent utility as it can stably include ingredients with poor oxidation stability, thereby completing the present invention. Prior art literature

[0004] Patent Registration Publication No. 10-2164583 The problem to be solved

[0005] The present invention aims to provide an oil-in-water type cosmetic composition.

[0006] The technical problems of the present invention are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0007] According to an embodiment of the present invention, an oil-in-water-in-oil (O / W / O) type cosmetic composition is provided, comprising an inner phase of the water-in-oil type (W / O) consisting of an aqueous phase and an oil phase, wherein the inner phase comprises potassium ascorbyl tocopheryl phosphate and an outermost oil phase comprising a lauryl dimethicone / polyglycerin-3 crosspolymer and oil.

[0008] The above potassium ascorbyl tocopheryl phosphate may be included in an amount of 0.01 to 0.08 weight% based on the total weight of the cosmetic composition.

[0009] The above lauryl dimethicone / polyglycerin-3 crosspolymer may be included in an amount of 0.5 to 2 weight percent based on the total weight of the cosmetic composition.

[0010] The above internal phase may contain an active ingredient, and the active ingredient may be one or more selected from the group consisting of retin-al, bakuchiol, resveratrol, and vitamin E. Effects of the invention

[0011] The cosmetic composition according to the present invention comprises a silicone-based emulsifier comprising lauryl dimethicone / polyglycerin-3 crosspolymer in the outer phase and potassium ascorbyl tocopheryl phosphate without a separate emulsifier in the inner phase, thereby enabling the stable formation of an oil-in-water type formulation and having excellent formulation stability for a long time. In addition, the cosmetic composition according to the present invention may include an active ingredient in the inner phase, and in particular, may stably include an ingredient with poor oxidative stability, thereby enabling stable delivery of the active ingredient to the skin. Brief explanation of the drawing

[0012] A brief description of each drawing is provided to help to better understand the drawings cited in the detailed description of the invention. Figure 1 is a diagram showing the composition of the oil-in-water type according to Example 1. Specific details for implementing the invention

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by a skilled expert in the art to which the present invention pertains. In general, the nomenclature used herein is well known and commonly used in the art. Furthermore, in describing embodiments of the present invention, detailed descriptions of related known components or functions are omitted if it is determined that such detailed descriptions would hinder understanding of the embodiments of the present invention. Additionally, while embodiments of the present invention will be described below, the technical concept of the present invention is not limited or restricted thereto and can be modified and implemented in various ways by those skilled in the art.

[0014] In this specification, when a part is described as including a certain component, it means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. In this specification, the term "and / or" includes a combination of a plurality of related items or any one of a plurality of related items.

[0016] According to an embodiment of the present invention, an oil-in-water-in-oil (O / W / O) type cosmetic composition is provided, comprising an inner phase of the water-in-oil type (W / O) consisting of an aqueous phase and an oil phase, wherein the inner phase comprises potassium ascorbyl tocopheryl phosphate and an outermost oil phase comprising a lauryl dimethicone / polyglycerin-3 crosspolymer and oil.

[0017] In the present invention, the term "water-in-oil type" refers to a formulation having an emulsion-in-emulsion structure in which an inner phase of the water-in-oil type (W / O), composed of an aqueous phase (W) and an oil phase (O), is dispersed within an outer oil phase (O). The water-in-oil type composition according to the present invention is formed through two-stage emulsification of the inner phase (W / O) and the outermost phase (O). Since the inner phase is doubly protected from the outer phase, the active ingredient can be stably contained within the emulsion-in-emulsion structure. In particular, it is characterized by the ability to stably maintain active ingredients with poor oxidative stability, enable more efficient delivery to the skin by controlling their release rate, and exhibit an improved user experience.

[0018] In the oil-in-water type composition of the present invention, the internal phase is an oil-in-water type (W / O) composed of an aqueous phase and an oil phase, and is characterized by being stabilized by including potassium ascorbyl tocopheryl phosphate without a separate emulsifier. The aqueous phase and the oil phase constituting the internal phase may be composed of known aqueous and oil phase components. At this time, the aqueous phase and the oil phase constituting the internal phase may be mixed in a weight ratio of 1:1 to 5, but are not limited thereto. In the oil-in-water type composition of the present invention, the internal phase may be included in an amount of 10 to 30 weight% based on the total weight of the composition, but are not limited thereto.

[0019] In the present invention, potassium ascorbyl tocopheryl phosphate is an ionic derivative in which an ascorbyl group (vitamin C) and a tocopheryl group (vitamin E) are bonded via a phosphate group, and is a substance that enables emulsion stabilization in the aqueous and oil phases. The potassium ascorbyl tocopheryl phosphate may be included in an amount of 0.01 to 0.08 weight% based on the total weight of the cosmetic composition, specifically in an amount of 0.04 to 0.08 weight%, but is not limited thereto. If the potassium ascorbyl tocopheryl phosphate is included in an amount less than 0.01 weight%, formulation stability is reduced, such as separation over time; if it is included in an amount exceeding 0.08 weight%, problems may occur, such as the formation of an oil-in-water-in-oil formulation not being formed and the formation turning over or shifting.

[0020] In the oil-in-water type composition of the present invention, the outermost phase is characterized by comprising a lauryl dimethicone / polyglycerin-3 crosspolymer and oil as an oil phase.

[0021] In the present invention, the lauryl dimethicone / polyglycerin-3 crosspolymer is a silicone-based emulsifier in which the hydrophobic silicone chains of lauryl dimethicone and the hydrophilic blocks of polyglycerin are bonded in a three-dimensional network structure. The lauryl dimethicone / polyglycerin-3 crosspolymer may be included in an amount of 0.5 to 2 weight% based on the total weight of the cosmetic composition, specifically in an amount of 1 to 1.5 weight%, but is not limited thereto. If the lauryl dimethicone / polyglycerin-3 crosspolymer is included in an amount less than 0.5 weight% or in an amount exceeding 2 weight%, an oil-in-water-in-oil type formulation cannot be formed.

[0022] In the present invention, the oil that may be included in the external substance may be a silicone oil, and specifically, may be selected from the group consisting of cyclopentasiloxane, caprylyl dimethicone, caprylyl methicone, diphetyl dimethicone, phenyl trimethicone and bis-hydroxyethoxypropyl dimethicone, but is not limited thereto.

[0023] In addition, the above oil may further include ester oil, specifically selected from the group consisting of triethylhexanoin, C12-15 alkyl benzoate, isononyl isononanoate, isododecane, neopentyl glycol diheptanoate, ethylhexyl palmitate, caprylic / capric triglyceride, and squalane, but is not limited thereto.

[0024] The above oil may be included in an amount of 1 to 30 weight percent based on the total weight of the cosmetic composition, but is not limited thereto.

[0025] The oil-in-water type cosmetic composition according to the present invention may contain an active ingredient in the internal phase. The active ingredient may be, for example, retin-al, bakuchiol, resveratrol, or vitamin E. Since the formulation stability of the oil-in-water type according to the present invention is excellent, even ingredients with poor oxidation stability or photostability as described above can be stably included in the formulation, and the skin delivery efficiency is excellent. Specifically, the active ingredient may be included in an amount of 0.001 to 5 weight% with respect to the total weight of the cosmetic composition, but is not limited thereto.

[0026] The above cosmetic composition may further comprise any conventional cosmetic ingredient selected from additional ingredients commonly used in cosmetics, such as moisturizers, dispersants, film-forming agents, emollients, fragrances, colorants, fillers, preservatives, antiseptics, neutralizing agents, vitamins, antioxidants, metal ion chelating agents, functional ingredients, and mixtures thereof. A person skilled in the art may select any additional ingredient and / or the amount thereof so that the advantageous properties of the composition according to this specification are not adversely affected or are substantially affected by the expected addition.

[0027] The above cosmetic composition may be formulated into solutions, suspensions, emulsions, lotions, creams, serums, essences, gels, oils, waxes, packs, patches, mask sheets, gels, ointments, oils, sprays, ampoules, etc., but is not limited thereto. Since the cosmetic composition according to the present invention has excellent stability, a pleasant feel, and facilitates the delivery of the intended active ingredient, it can be appropriately formulated and used according to the intended use.

[0028] The cosmetic composition according to the present invention can be used according to a conventional method of use, and the frequency of use may be varied depending on the user's skin condition or preference.

[0030] In the following, examples and experimental examples are presented to further explain the present invention in more detail, but the present invention is not limited thereto.

[0032] [Preparation Example]

[0033] Example 1. Preparation of an oil-in-water type cosmetic composition

[0034] A water-in-oil type cosmetic composition was prepared using the ingredients listed in Table 1 below, wherein the outer phase contains lauryl dimethicone / polyglycerin-3 crosspolymer and oil, and the inner phase contains potassium ascorbyl tocopheryl phosphate without a separate emulsifier. In this case, Phase C of Table 1 contains oil, purified water, glycerin, tocopherol, and a preservative in addition to potassium ascorbyl tocopheryl phosphate, and may further contain the desired active ingredient (corresponding to bakuchiol in Table 2), and the specific ingredients of Phase C are shown in Table 2. Specifically, potassium ascorbyl tocopheryl phosphate was included in Phase C at 0.4 wt%, which translates to 0.08 wt% for the entire cosmetic composition. The unit of the ingredient content in Tables 1 and 2 is wt%.

[0035]

[0036]

[0037] More specifically, Phase C was prepared by emulsifying the components of Table 2 in Phase D under 50°C conditions, and Phases B and D were sequentially added to prepare a mixture. By mixing the mixture with Phase A, the oil-in-water-in-oil (O / W / O) emulsion cosmetic composition of Example 1 was prepared.

[0039] Preparation of Comparative Examples 1 to 3

[0040] Comparative Examples 1 to 3 were prepared as shown in Table 3 below, which do not contain either lauryl dimethicone / polyglycerin-3 crosspolymer or potassium ascorbyl tocopheryl phosphate. Potassium ascorbyl tocopheryl phosphate was included as part of the C phase, the remaining components were the same as in Example 1, and the preparation method was also the same. The unit of the component content in Table 3 is weight% and is indicated based on 100 weight% of the cosmetic composition.

[0041]

[0042] Preparation of Comparative Examples 4 and 5

[0043] Comparative Examples 4 to 5 were prepared by adjusting the content of lauryl dimethicone / polyglycerin-3 crosspolymer as shown in Table 4 below. The unit of the component content in Table 4 is weight% and is indicated based on 100 weight% of the cosmetic composition.

[0044]

[0045] Preparation of Comparative Examples 6 and 7

[0046] Comparative Examples 6 to 7 were prepared by adjusting the content of potassium ascorbyl tocopheryl phosphate as shown in Table 5 below. Potassium ascorbyl tocopheryl phosphate was included as part of the C phase, and the unit of the component content in Table 5 is weight%, expressed based on 100 weight% of the cosmetic composition.

[0047]

[0048] Experimental Example 1. Verification of feasibility and stability of manufacturing oil-in-water type

[0049] The presence of an oil-in-water-in-oil (O / W / O) type and formulation stability of the compositions according to the examples and comparative examples prepared in the above manufacturing examples were verified. Formulation stability was observed for one month at 25°C and 50°C; O was indicated if stable under all conditions, and X was indicated if unstable. Additionally, if the oil-in-water-in-oil type was not formed, X was indicated without performing the formulation stability test. The results are shown in Table 6 and Figure 1.

[0050]

[0051] As shown in Table 6 and Figure 1, the composition of Example 1, which contains lauryl dimethicone / polyglycerin-3 crosspolymer and oil in the outer phase and potassium ascorbyl tocopheryl phosphate without a separate emulsifier in the inner phase, was confirmed to be capable of forming an oil-in-water type formulation and also has excellent formulation stability.

[0052] In contrast, the composition of Comparative Example 1, which did not contain lauryl dimethicone / polyglycerin-3 crosspolymer, was unable to form an oil-in-water type formulation, and the composition of Comparative Example 2, which contained PEG-10 dimethicone instead of lauryl dimethicone / polyglycerin-3 crosspolymer, formed an oil-in-water type formulation but subsequently showed poor stability, such as separation of the formulation.

[0053] In addition, the composition of Comparative Example 3, which does not contain potassium ascorbyl tocopheryl phosphate, could not form an oil-in-water type formulation. Furthermore, the composition of Comparative Example 4, which contains a relatively small amount of lauryl dimethicone / polyglycerin-3 crosspolymer, could not form an oil-in-water type formulation and syneresis occurred, while the composition of Comparative Example 5, which contains a relatively excessive amount of lauryl dimethicone / polyglycerin-3 crosspolymer, formed an oil-in-water type formulation but agitation occurred at high temperatures.

[0054] In addition, the composition of Comparative Example 6, which contains a relatively small amount of potassium ascorbyl tocopheryl phosphate, formed an oil-in-water type formulation but subsequently showed problems with formulation stability, such as separation over time, and the composition of Comparative Example 7, which contains a relatively excessive amount of potassium ascorbyl tocopheryl phosphate, was found to be unable to form an oil-in-water type formulation and showed inversion or turbulence of the formulation.

[0055] Through this, it was confirmed that a stable oil-in-water type formulation can be formed by including lauryl dimethicone / polyglycerin-3 crosspolymer and potassium ascorbyl tocopheryl phosphate in the optimal range.

[0057] Overall, it was confirmed that a cosmetic composition of the oil-in-water type formulation with excellent formulation stability can be prepared by including a silicone-based emulsifier containing lauryl dimethicone / polyglycerin-3 crosspolymer in the outer phase and potassium ascorbyl tocopheryl phosphate without a separate emulsifier in the inner phase.

[0059] Foregoing, specific parts of the content of the present invention have been described in detail. It will be apparent to those skilled in the art that such specific descriptions are merely preferred embodiments and do not limit the scope of the present invention. Accordingly, the actual scope of the present invention is defined by the appended claims and their equivalents.

Claims

Claim 1 A water-in-oil type cosmetic composition comprising an inner phase of the water-in-oil type (W / O) consisting of an aqueous phase and an oil phase, wherein the inner phase comprises potassium ascorbyl tocopheryl phosphate and an outermost oil phase comprising a lauryl dimethicone / polyglycerin-3 crosspolymer and oil. Claim 2 An oil-in-water-in-oil (O / W / O) type cosmetic composition according to claim 1, wherein the potassium ascorbyl tocopheryl phosphate is included in an amount of 0.01 to 0.08 weight% based on the total weight of the cosmetic composition. Claim 3 An oil-in-water-in-oil (O / W / O) type cosmetic composition according to claim 1, wherein the lauryl dimethicone / polyglycerin-3 crosspolymer is included in an amount of 0.5 to 2 weight% based on the total weight of the cosmetic composition. Claim 4 An oil-in-water-in-oil (O / W / O) type cosmetic composition according to claim 1, wherein the oil is a silicone oil selected from the group consisting of cyclopentasiloxane, caprylyl dimethicone, caprylyl methicone, diphetyl dimethicone, phenyl trimethicone, and bis-hydroxyethoxypropyl dimethicone. Claim 5 An oil-in-water-in-oil (O / W / O) type cosmetic composition according to claim 1, wherein the internal phase contains an active ingredient. Claim 6 In claim 5, the above active ingredient is one or more selected from the group consisting of retin-al, bakuchiol, resveratrol, and vitamin E, an oil-in-water-in-oil (O / W / O) type cosmetic composition.

Images