Oil drop-type cosmetic composition

Abstract

According to an embodiment of the present application, an oil drop-type cosmetic composition is provided. The oil drop-type cosmetic composition comprises: an aqueous phase part including a polyol, a thickener that includes an acrylic acid-based polymer, and an aqueous phase stabilizer; and an oil phase part including an oil and an oil phase stabilizer. The cosmetic composition, which can reduce skin irritation caused by surfactants by not including surfactants and stably forms oil drops, can be provided.

Description

Oil drop-type cosmetic composition

[0001] The present application relates to an oil drop type cosmetic composition.

[0002] Surfactants are substances added to emulsions. They generally function to reduce the interfacial tension between the water and oil phases, and are used in many cosmetics. However, surfactants can cause skin dryness due to moisture loss and sensitivity to external irritants by destroying the skin's phospholipid layer.

[0003] Meanwhile, if a surfactant is not included in an oil drop-type cosmetic composition, not only is the stability of the oil particles not maintained, but there is also the problem of unstable emulsification of the water phase and the oil phase.

[0004] [Prior Art Literature]

[0005] (Patent Document) KR 10-1994619 B1

[0006] The purpose of this application is to provide an oil drop type cosmetic composition.

[0007] According to an embodiment of the present application, an oil drop-type cosmetic composition is provided. The oil drop-type cosmetic composition comprises an aqueous phase comprising a thickener including a polyol and an acrylic acid polymer and an aqueous phase stabilizer; and an oil phase comprising an oil and an oil phase stabilizer; and may not include a surfactant.

[0008] In addition, the water stabilizer may be included in an amount of more than 0.001 part by weight and less than 0.4 part by weight relative to 1 part by weight of the polyol.

[0009] Additionally, the thickener may be included in an amount of more than 0.001 parts by weight and less than 1.2 parts by weight relative to 1 part by weight of the polyol.

[0010] In addition, the oil stabilizer may be included in an amount of more than 0.02 parts by weight and less than 1.2 parts by weight relative to 1 part by weight of the oil.

[0011] Additionally, the polyol may be included in an amount of 1 to 20 wt% based on the total weight of the cosmetic composition.

[0012] In addition, the thickener may be included in an amount of more than 0.005 wt% and less than 6 wt% based on the total weight of the cosmetic composition.

[0013] In addition, the above-mentioned water stabilizer may be included in an amount of more than 0.005 wt% and less than 2 wt% based on the total weight of the cosmetic composition.

[0014] In addition, the above-mentioned oil stabilizer may be included in an amount of more than 0.05 wt% and less than 6 wt% based on the total weight of the cosmetic composition.

[0015] Additionally, the acrylic acid polymer may include one or more of a vinylpyrrolidone-acrylic acid copolymer, a methyl methacrylate-acrylic acid copolymer, a methyl methacrylate-methacrylic acid copolymer, a carbomer, sodium polyacrylate, polyacrylic acid, or polymethacrylic acid.

[0016] Additionally, the water stabilizer may include at least one of an acrylate / C10-30 alkyl acrylate crosspolymer, an ammonium acryloyldimethyltaurate / beheneth-25 methacrylate crosspolymer, an acrylate / palmeth-25 acrylate copolymer, or an acrylate / beheneth-25 methacrylate copolymer.

[0017] Additionally, the oil stabilizer may include polyamide-8.

[0018] According to an embodiment of the present application, an oil drop-type cosmetic composition can be provided that includes a water stabilizer and an oil stabilizer, thereby reducing skin irritation caused by a surfactant without including a surfactant, and stably implementing an oil drop formulation.

[0019] The effects that can be obtained in the embodiments of the present application are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by a person having ordinary skill in the technical field to which the present application belongs from the description below.

[0020] To facilitate a more thorough understanding of the drawings cited in this application, a brief description of each drawing is provided.

[0021] Figure 1 is a drawing showing the results of observing whether oil drop formulations are formed in manufacturing examples.

[0022] The structural or functional descriptions of the embodiments disclosed in this specification are merely illustrative for the purpose of explaining embodiments according to the technical concept of the present application. Furthermore, embodiments according to the technical concept of the present application may be implemented in various forms other than those disclosed herein. Furthermore, the technical concept of the present application is not limited to the embodiments described herein.

[0023] Among the properties mentioned in this specification, if the measurement temperature affects the properties, the properties are properties measured at room temperature and pressure, unless otherwise specified.

[0024] Unless otherwise specified, the properties mentioned in this specification may basically follow the SI unit system. For example, weight may use the kg unit, and length may use the m unit.

[0025] The term room temperature used herein refers to a natural temperature that is not heated or cooled, and may mean, for example, any temperature within the range of 10°C to 30°C, for example, a temperature that is about 15°C or higher, about 18°C ​​or higher, about 20°C or higher, about 23°C or higher, about 27°C or lower, or 25°C. Unless specifically defined herein, the unit of temperature is Celsius (°C).

[0026] The term "relatively high temperature compared to room temperature" used herein means a temperature higher than the room temperature, and may mean, for example, any temperature within the range of 30°C to 50°C, for example, a temperature of about 35°C or higher, about 40°C or higher, or about 45°C or lower.

[0027] Among the properties mentioned in this specification, if the measurement pressure affects the property, the property is a property measured at atmospheric pressure unless otherwise specified. The term atmospheric pressure used in this specification refers to the natural pressure that is neither pressurized nor depressurized, and typically refers to atmospheric pressure within the range of approximately 700 mmHg to 800 mmHg.

[0028] The terms a to b used in this specification mean a and b inclusive and within the range between a and b. For example, including a to b by weight means including within the range of a to b by weight.

[0029] The terminology used in this specification is for the purpose of describing embodiments and is not intended to limit or restrict the present application. Singular expressions include plural expressions unless the context clearly dictates otherwise. Furthermore, numbers used in this specification (e.g., "first," "second," etc.) are merely identifiers used to distinguish one component from another.

[0030] As used herein, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or." That is, unless otherwise specified or clear from context, "X employs A or B" is intended to mean either of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, "X employs A or B" can apply to any of these cases. Furthermore, the term "and / or" as used herein should be understood to refer to and encompass all possible combinations of one or more of the associated listed items.

[0031] Hereinafter, exemplary embodiments according to the present application will be described in detail with reference to the contents described in the attached drawings.

[0032]

[0033] In this specification, “oil drop” refers to oil particles forming spherical droplets, i.e., oil droplets, and “oil drop-type cosmetic composition” refers to a cosmetic composition containing spherical oil droplets.

[0034] Specifically, the above oil drop-type cosmetic composition refers to a cosmetic composition in which oil droplets are dispersed within the water phase. In this case, the oil droplets being dispersed means that the oil droplets do not coalesce with each other, the shape of the oil droplets is stably maintained, and the oil droplets do not sink to the bottom of the composition but are stably dispersed within the water phase.

[0035] As used herein, "water stabilizer" refers to a type of polymer emulsifier that prevents the coalescence of oil droplets. For example, the water stabilizer may be a polymer with a hydrophobic alkyl chain, and may be distinguished from an amphiphilic surfactant.

[0036] As used herein, "oil stabilizer" refers to a component that stabilizes the oil phase contained in a cosmetic composition. For example, an oil stabilizer can stabilize oil particles, i.e., oil drops, by increasing viscosity.

[0037]

[0038] According to an embodiment of the present application, an oil drop-type cosmetic composition is provided. The oil drop-type cosmetic composition comprises: an aqueous phase comprising a thickener including a polyol and an acrylic acid polymer and an aqueous phase stabilizer; and an oil phase comprising an oil and an oil phase stabilizer; and may not include a surfactant.

[0039] In some embodiments, the polyol may include glycerin. However, any polyol that does not impair the purpose of the present invention and can be used in the art is not limited thereto. The polyol can provide skin softening and moisturizing effects.

[0040] In an embodiment, the polyol may be included in an amount of 1 wt% or more, 20 wt% or less, 15 wt% or less, or 10 wt% or less, based on the total weight of the cosmetic composition. For example, the polyol may be included in an amount of 1 to 20 wt%, 1 to 15 wt%, or 1 to 10 wt% based on the total weight of the cosmetic composition. If the content of the polyol is less than the aforementioned range, the moisturizing effect may be reduced, and if it exceeds the aforementioned range, a sticky feeling or skin irritation may occur.

[0041] In an embodiment, the cosmetic composition may include a thickener to maintain the stability of the oil drop. The stability of the oil drop may be higher when the shape of the oil drop is close to a spherical shape, the strength of the oil drop is excellent, and the emulsion stability is excellent. The emulsion stability refers to the cosmetic composition's ability to maintain the oil drop stability even under harsh conditions. For example, if the oil drop is dispersed without mixing with the water phase even after being left under harsh conditions (50°C for one month), the cosmetic composition may be judged to have excellent emulsion stability.

[0042] In an embodiment, the cosmetic composition may include an acrylic acid polymer as a thickener. The acrylic acid polymer may include an acrylic acid polymer or an acrylic acid derivative polymer. For example, the acrylic acid polymer may include one or more of a vinylpyrrolidone-acrylic acid copolymer, a methyl methacrylate-acrylic acid copolymer, a methyl methacrylate-methacrylic acid copolymer, a carbomer, sodium polyacrylate, polyacrylic acid, or polymethacrylic acid, but is not limited thereto. However, when sodium alginate is included as a thickener, the stability of the oil drop may be reduced, and therefore, sodium alginate may not be suitable as a thickener of the present invention.

[0043] In an embodiment, the thickener may be included in an amount of greater than 0.005 wt%, greater than 0.01 wt%, greater than 0.05 wt%, greater than 0.1 wt%, less than 6 wt%, less than 5 wt%, less than 4 wt%, less than 3 wt%, or less than 2 wt%, based on the total weight of the cosmetic composition. For example, the thickener may be included in an amount of greater than 0.005 wt% and less than 6 wt%, or from 0.05 to 4 wt%, or from 0.1 to 2 wt%, based on the total weight of the cosmetic composition. Beyond the above range, if the thickener is included in an amount less than the above range, the stability of the oil drop may be lowered, and if the thickener is included in an amount exceeding the above range, the viscosity of the cosmetic composition may be excessive, making it impossible to form an oil drop.

[0044] In an embodiment, the thickener may be included in an amount of more than 0.001 part by weight, or more than 0.005 part by weight, or more than 0.01 part by weight, or less than 1.2 part by weight, or less than 1 part by weight, or less than 0.5 part by weight, or less than 0.1 part by weight, or less than 0.05 part by weight, relative to 1 part by weight of the polyol. For example, the thickener may be included in an amount of more than 0.001 part by weight and less than 1.2 part by weight, or from 0.005 to 1 part by weight, or from 0.01 to 0.05 part by weight, relative to 1 part by weight of the polyol. Beyond the above range, if the thickener is included in a small amount relative to the polyol, the stability of the oil drop may be lowered, and if the thickener is included in an excessive amount relative to the polyol, the viscosity of the cosmetic composition may be excessive, making it impossible to form an oil drop.

[0045] In an embodiment, the cosmetic composition may include a water stabilizer. The water stabilizer may function to aid emulsification.

[0046] In an embodiment, the water stabilizer may be a polymer having a hydrophobic alkyl chain. For example, it may include one or more of an acrylate / C10-30 alkyl acrylate crosspolymer, an ammonium acryloyldimethyl taurate / beheneth-25 methacrylate crosspolymer, an acrylate / palmeth-25 acrylate copolymer, or an acrylate / beheneth-25 methacrylate copolymer, but is not limited thereto as long as it does not harm the purpose of the present invention.

[0047] In some embodiments, the water stabilizer may be included in an amount of greater than 0.005 wt%, greater than 0.01 wt%, greater than 0.015 wt%, greater than 0.02 wt%, or greater than 0.03 wt%, or less than 2 wt%, less than 1.5 wt%, less than 1 wt%, less than 0.5 wt%, or less than 0.1 wt%, based on the total weight of the cosmetic composition. For example, the water stabilizer may be included in an amount of greater than 0.005 wt% but less than 2 wt%, or from 0.01 to 1.5 wt%, or from 0.015 to 1 wt%, or from 0.02 to 0.5 wt%, or from 0.03 to 0.1 wt% based on the total weight of the cosmetic composition. Beyond the aforementioned range, if the water stabilizer is included in an amount less than the above range, the stability of the oil drop may be reduced, and if the water stabilizer is included in an amount exceeding the above range, the viscosity of the cosmetic composition may be excessive, making it impossible to form an oil drop.

[0048] In an embodiment, the water-phase stabilizer may be included in an amount of more than 0.001 part by weight, or more than 0.002 part by weight, or more than 0.003 part by weight, or more than 0.004 part by weight, or less than 0.4 part by weight, or less than 0.3 part by weight, or less than 0.2 part by weight, or less than 0.1 part by weight, relative to 1 part by weight of the polyol. For example, the water-phase stabilizer may be included in an amount of more than 0.001 part by weight and less than 0.4 part by weight, or from 0.002 to 0.3 part by weight, or from 0.003 to 0.2 part by weight, or from 0.004 to 0.1 part by weight, relative to 1 part by weight of the polyol. If the amount of the water-phase stabilizer is included in a small amount relative to the polyol, the stability of the oil drop may be lowered, and if the amount of the water-phase stabilizer is included in an excessive amount relative to the polyol, the viscosity of the cosmetic composition may be excessive, making it impossible to form an oil drop.

[0049] In an embodiment, the oil may include 2-octyldodecanol. However, any oil that does not impair the purpose of the present invention and can be used in the art is not limited thereto.

[0050] In an embodiment, the oil may be included in an amount of 1 wt% or more, 80 wt% or less, 70 wt% or less, 60 wt% or less, or 50 wt% or less, based on the total weight of the cosmetic composition. For example, the oil may be included in an amount of 1 to 80 wt%, 1 to 70 wt%, 1 to 60 wt%, or 1 to 50 wt% based on the total weight of the cosmetic composition. If the oil content is less than the aforementioned range, it may be impossible to implement a cosmetic composition including oil drops, and if it exceeds the aforementioned range, oil drops may not be formed.

[0051] In some embodiments, the cosmetic composition may include an oil stabilizer. The oil stabilizer may increase the viscosity of the oil phase and stabilize the oil droplets.

[0052] In the embodiment, the oil phase stabilizer may include, but is not limited to, polyamide-8. However, if polyamide-3, dextrin palmitate, or hectorite is included as the oil phase stabilizer, the stability of the oil drop may be reduced, and therefore, polyamide-3, dextrin palmitate, or hectorite may not be suitable as the oil phase stabilizer of the present invention.

[0053] In an embodiment, the oil stabilizer may be included in an amount of more than 0.05 wt%, more than 0.1 wt%, or more than 0.2 wt%, or less than 6 wt%, less than 5 wt%, or less than 4 wt%, based on the total weight of the cosmetic composition. For example, the oil stabilizer may be included in an amount of more than 0.05 wt% and less than 6 wt%, or 0.1 to 5 wt%, or 0.2 to 4 wt%, based on the total weight of the cosmetic composition. If the content of the oil stabilizer is less than the above-mentioned range, the stability of the oil drop may be lowered, and if the content of the oil stabilizer exceeds the above-mentioned range, the emulsion stability, for example, the stability of the oil drop under harsh conditions, may be lowered.

[0054] In an embodiment, the oil stabilizer may be included in an amount greater than 0.02 parts by weight, greater than 0.04 parts by weight, or less than 1.2 parts by weight, less than 1 part by weight, or less than 0.4 parts by weight, relative to 1 part by weight of the oil. Beyond the aforementioned range, inclusion of a small amount of the oil stabilizer relative to the oil may lower the stability of the oil drop, and inclusion of an excessive amount of the oil stabilizer relative to the oil may lower the emulsion stability, for example, the stability of the oil drop under harsh conditions.

[0055]

[0056] In an embodiment, the cosmetic composition may further include additives commonly used in the art, as long as they do not impair the effects of the embodiments of the present application. For example, the cosmetic composition may further include thickeners, pH adjusters, surfactants, stabilizers, preservatives, antiseptics, bactericides, moisturizers, sunscreens, skin conditioning agents, whitening agents, colorants, organic pigments, inorganic pigments, fragrances, vitamins, natural pigments, pearls, and other functional ingredients. Here, the functional ingredients may include, for example, wrinkle-improving ingredients, whitening ingredients, antioxidant ingredients, anti-aging ingredients, plumping ingredients, exfoliating ingredients, scrubbing ingredients, moisturizing ingredients, skin barrier strengthening ingredients, skin elasticity strengthening ingredients, and the like. A person skilled in the art can easily select the blending amount of the above ingredients as long as it does not impair the purpose and effects of the present application.

[0057] In an embodiment, the cosmetic composition may be provided in a formulation conventionally manufactured in the art. For example, the cosmetic composition may be formulated as an oil-based dispersion formulation in which a powder complex is dispersed in an oil phase, an aqueous dispersion formulation in which a powder complex is dispersed in an aqueous phase, an oil-in-water (O / W), water-in-oil (W / O), water-in-oil-in-water (W / O / W), and oil-in-water-in-oil (O / W / O) emulsion formulation, a solubilized formulation, etc. However, the present invention is not limited thereto, and the cosmetic composition may also be provided in the form of a solution, suspension, emulsion, solid, gel, oil, powder, paste, or foam aerosol.

[0058] In embodiments, the cosmetic composition may be manufactured into various products. For example, it may be manufactured into sun care products such as sunscreen, sun stick, sun milk, sun lotion, and sun cushion. For example, it may be manufactured into functional cosmetics such as nourishing cream, essence, and ampoule, or basic cosmetics such as toner and lotion. In addition, it may be manufactured into soap, detergent, cleansing cream, and cleansing water, or color cosmetics such as lipstick, lip balm, mascara, blusher, shading, highlighter, makeup base, foundation, pact, concealer, and skin cover. It may also be manufactured into hair cleansing products such as shampoo, rinse, hair conditioner, and hair gel. Furthermore, it may be manufactured into products that adhere to the skin, such as packs, hydrogel slimming patches, and the like, or products that are sprayed onto the skin, such as mists and aerosols.

[0059] In an embodiment, the composition may be a topical skin composition. For example, the topical skin composition may have a formulation such as a solution, oil, paste, cream, gel, patch, spray, etc.

[0060] In the embodiment, the external skin composition may appropriately blend ingredients commonly used in external skin preparations such as cosmetics or medicines, such as aqueous ingredients, oily ingredients, powder ingredients, alcohols, moisturizers, thickeners, sunscreens, whitening agents, preservatives, antioxidants, surfactants, fragrances, colorants, fatty substances, solubilizers, thickeners, gelling agents, softeners, foaming agents, air fresheners, metal ion sequestrants, chelating agents, vitamins, various skin nutrients, or combinations thereof, as needed. The blending amount of the above ingredients can be easily selected by those skilled in the art within a range that does not impair the purpose and effect of the present application.

[0061]

[0062] Hereinafter, the present invention will be described through manufacturing examples and experimental examples, but the scope of the present invention is not limited by the contents presented below.

[0063]

[0064] Manufacturing example

[0065]

[0066] (1) Manufacturing Examples 1 to 5: Cosmetic composition according to the weight ratio of oil and oil stabilizer

[0067] According to Table 1 below, cosmetic compositions were prepared by varying the weight ratios of oil and oil stabilizer. The unit in Table 1 below is weight%.

[0068]

[0069] Classification Manufacturing Example 1 Manufacturing Example 2 Manufacturing Example 3 Manufacturing Example 4 Manufacturing Example 5 Water phase stabilizer Water to 100 to 100 to 100 to 100 to 100 to 100 Polyol Glycerin 55 55 5 Thickener Carbomer 0.15 0.15 0.15 0.15 Water phase stabilizer Acrylate / C10-30 Alkyl Acrylate Crosspolymer 0.04 0.04 0.04 0.04 0.04 Oil phase Oil Octyldodecanol 51 0 5 10 5 Oil phase stabilizer Polyamide-8 0.24 0.05 0.26 Preservative 0.10 10 10 10 Oil : Oil phase stabilizer 1 : 0.04 1 : 0.41 : 0.011 : 0.021 : 1.2 Polyol : Thickener 1 : 0.031 : 0.031 : 0.031 : 0.031 : 0.03 Polyol : Water stabilizer 1 : 0.081 : 0.081 : 0.081 : 0.081 : 0.08

[0070]

[0071] The specific manufacturing method is as follows.

[0072] After heating the oil phase to 80°C, the oil phase was slowly added to the water phase at room temperature, and stirred with an azimuth mixer at 500 rpm for 5 minutes to prepare an oil drop cosmetic composition.

[0073]

[0074] (2) Manufacturing Examples 6 to 9: Cosmetic composition according to the type of oil stabilizer

[0075] According to Table 2 below, a cosmetic composition was prepared in the same manner as in Manufacturing Example 1, using different types of oil stabilizers. The units in Table 2 below are weight%.

[0076]

[0077] Classification Manufacturing Example 6 Manufacturing Example 7 Manufacturing Example 8 Manufacturing Example 9 Water phase Unrefined water to 100 to 100 to 100 to 100 Polyol Glycerin 5555 Thickener Carbomer 0.15 0.15 0.15 0.15 Water phase stabilizer Acrylate / C10-30 Alkyl acrylate crosspolymer 0.04 0.04 0.04 0.04 Oil phase Oil Octyldodecanol 5555 Oil phase stabilizer Polyamide-8 ---- Polyamide-30.2 --- Dextrin Palmitate-0.2 1-Hectorite --- 0.2 Preservative 0.10 10 10.1

[0078]

[0079] (3) Manufacturing Examples 10 to 13: Cosmetic composition according to thickening agent

[0080] According to Table 3 below, a cosmetic composition was prepared in the same manner as in Manufacturing Example 1, but with different types and weight ratios of thickeners. The unit in Table 3 below is weight%.

[0081]

[0082] Classification Manufacturing Example 10 Manufacturing Example 11 Manufacturing Example 12 Manufacturing Example 13 Water phase Unrefined water to 100 to 100 to 100 to 100 Polyol Glycerin 5555 Thickener Carbomer 0.0056 -- Sodium alginate -- 0.15 0.15 Water phase Stabilizer Acrylate / C10-30 Alkyl Acrylate Crosspolymer 0.04 0.04 0.04 0.04 Oil phase Oil Octyldodecanol 5555 Oil phase Stabilizer Polyamide-8 0.2 0.2 0.2-Hectorite --- 0.2 Preservative 0.10.10.10.1 Polyol : Thickener 1 : 0.00 1 1 : 1.2 1 : 0.03 1 : 0.03

[0083]

[0084] (4) Manufacturing Examples 14 and 15: Cosmetic composition according to water stabilizer

[0085] According to Table 4 below, a cosmetic composition was prepared in the same manner as in Manufacturing Example 1, with different types and weight ratios of water stabilizers. The unit in Table 4 below is weight%.

[0086]

[0087] Classification Manufacturing Example 14 Manufacturing Example 15 Water phase, unpurified water to 100 to 100, polyol, glycerin 55, thickener, carbomer 0.15, 0.15, water phase stabilizer, acrylate / C10-30 alkyl acrylate crosspolymer 0.005, 2, oil phase, oil octyldodecanol 55, oil phase stabilizer, polyamide-8 0.2, 0.2, preservative 0.10, 1, polyol: water phase stabilizer 1: 0.001, 1: 0.4

[0088]

[0089] Experimental example

[0090]

[0091] (1) Experimental Example 1: Analysis of the shape and strength of oil drops and emulsion stability

[0092] The shape, strength, and emulsification stability of the oil drop and the cosmetic composition were analyzed and are shown in Table 5 below.

[0093] The shape and strength of the oil drop were compared by aliquoting equal amounts of each cosmetic composition using a micropipette and observing them under a microscope. The strength of the oil drop was evaluated and observed using a cover glass, and the degree to which the shape or size of the oil drop changed due to external force was observed and evaluated as excellent (O), average (△), or poor (X).

[0094] Emulsion stability was compared by observing the cosmetic composition under harsh conditions (1 month at 50℃) under a microscope. If the composition was stable without any change in the shape of the oil drop, it was evaluated as excellent (O). If the shape of the oil drop changed slightly, it was evaluated as average (△). If the shape of the oil drop changed significantly, was not uniform, and the formulation was unstable, it was evaluated as poor (X).

[0095]

[0096] Classification Oil drop Emulsification Stability Shape Strength Manufacturing Example 1 Spherical OO Manufacturing Example 2 Spherical OO Manufacturing Example 3 Spherical △X Manufacturing Example 4 Spherical △△ Manufacturing Example 5 Spherical OX Manufacturing Example 6 Spherical △X Manufacturing Example 7 Spherical OX Manufacturing Example 8 Amorphous △X Manufacturing Example 9 Spherical XX Manufacturing Example 10 Spherical △X Manufacturing Example 11 XXX Manufacturing Example 12 Spherical XX Manufacturing Example 13 Spherical XX Manufacturing Example 14 Spherical △X Manufacturing Example 15 XXX

[0097]

[0098] Manufacturing Examples 1 and 2 confirmed that the shape of the oil drop was spherical, the strength of the oil drop was excellent, and emulsion stability was maintained even under harsh conditions.

[0099] On the other hand, in Manufacturing Examples 3 and 4, which contained a small amount of oil-phase stabilizer relative to the oil, oil drops were formed in a spherical shape but the drop strength was weak, whereas in Manufacturing Example 5, which contained a large amount of oil-phase stabilizer relative to the oil, oil drops were formed in a spherical shape and the drop strength was good. Accordingly, it was determined that the content of the oil-phase stabilizer affected the strength of the oil drop. However, Manufacturing Example 5 did not maintain emulsion stability under harsh conditions.

[0100] Manufacturing Example 6, which included polyamide-3 as an oil stabilizer, formed spherical oil drops, but the strength of the drops was weak, so polyamide-3 was not suitable as an oil stabilizer.

[0101] Manufacturing Example 7, which contained 0.2 wt% of dextrin palmitate as an oil phase stabilizer, had spherical oil drops and good drop strength, but Manufacturing Example 8, which contained 1 wt% of dextrin palmitate, had amorphous oil drops and poor drop strength. In addition, Manufacturing Examples 7 and 8 did not maintain emulsion stability under harsh conditions, and therefore, it was determined that dextrin palmitate was not suitable as an oil phase stabilizer.

[0102] Manufacturing Example 9, which included hectorite as an oil phase stabilizer, formed spherical oil drops, but the drop strength was weak and was not suitable as an oil phase stabilizer.

[0103] Manufacturing Example 10, which contained a small amount of thickener compared to polyol, formed spherical oil drops, but the strength of the drops was weak, and Manufacturing Example 11, which contained an excessive amount of thickener compared to polyol, had excessive viscosity and did not form oil drops.

[0104] Manufacturing Examples 12 and 13, which included sodium alginate as a thickener, formed spherical oil drops, but the drop strength was weak, so sodium alginate was judged to be unsuitable as a thickener. In particular, Manufacturing Example 13, which included dextrin palmitate as an oil phase stabilizer, also had the problem of weak drop strength.

[0105] Manufacturing Example 14, which contained a small amount of water-soluble stabilizer compared to polyol, formed spherical oil drops, but the strength of the drops was weaker than in Manufacturing Examples 1 and 2. On the other hand, Manufacturing Example 15, which contained an excessive amount of water-soluble stabilizer compared to polyol, had excessive viscosity and failed to form oil drops.

[0106] The results of observing the oil drops of each cosmetic composition under a microscope are shown in Fig. 1.

[0107]

[0108] While specific portions of the contents of this application have been described in detail above, it will be apparent to those skilled in the art that these specific descriptions merely represent preferred embodiments and do not limit the scope of this application. Therefore, the substantial scope of this application is defined by the appended claims and their equivalents.

Claims

1. A water phase comprising a thickener and a water phase stabilizer including a polyol and an acrylic acid polymer; and An oil phase comprising oil and an oil stabilizer; An oil drop-type cosmetic composition that does not contain a surfactant.

2. In paragraph 1, An oil drop-type cosmetic composition comprising the water stabilizer in an amount of more than 0.001 part by weight and less than 0.4 part by weight relative to 1 part by weight of the polyol.

3. In paragraph 1, An oil drop-type cosmetic composition comprising the thickener in an amount of more than 0.001 part by weight and less than 1.2 parts by weight relative to 1 part by weight of the polyol.

4. In paragraph 1, An oil drop-type cosmetic composition comprising the oil stabilizer in an amount of more than 0.02 parts by weight and less than 1.2 parts by weight relative to 1 part by weight of the oil.

5. In paragraph 1, An oil drop-type cosmetic composition comprising 1 to 20 wt% of the polyol based on the total weight of the cosmetic composition.

6. In paragraph 1, An oil drop-type cosmetic composition comprising the thickening agent in an amount of more than 0.005 wt% and less than 6 wt% based on the total weight of the cosmetic composition.

7. In paragraph 1, An oil drop-type cosmetic composition comprising the water-soluble stabilizer in an amount of more than 0.005 wt% and less than 2 wt% based on the total weight of the cosmetic composition.

8. In paragraph 1, An oil drop-type cosmetic composition comprising the oil stabilizer in an amount of more than 0.05 wt% and less than 6 wt% based on the total weight of the cosmetic composition.

9. In paragraph 1, An oil drop-type cosmetic composition, wherein the acrylic acid-based polymer comprises at least one of a vinylpyrrolidone-acrylic acid copolymer, a methyl methacrylate-acrylic acid copolymer, a methyl methacrylate-methacrylic acid copolymer, a carbomer, sodium polyacrylate, polyacrylic acid, or polymethacrylic acid.

10. In paragraph 1, An oil drop-type cosmetic composition, wherein the water-soluble stabilizer comprises at least one of acrylate / C10-30 alkyl acrylate crosspolymer, ammonium acryloyldimethyl taurate / beheneth-25 methacrylate crosspolymer, acrylate / palmeth-25 acrylate copolymer, or acrylate / beheneth-25 methacrylate copolymer.

11. In paragraph 1, An oil drop-type cosmetic composition comprising the above-mentioned oil stabilizer, polyamide-8.

Images