Water-in-oil emulsion cosmetic composition

Abstract

To provide a water-in-oil type emulsion cosmetic composition having fresh feeling of use, emulsion stability and usability.SOLUTION: The problem can be solved by a water-in-oil emulsion cosmetic composition comprising (A) a wax-type solid oil agent having a melting temperature of 60 °C or higher, (B) one or more nonionic surfactants having an HLB value of 3.5 to 9.5, (C) C12 to C24 higher fatty acids, and (D) water, wherein the water content is 35% by mass or more based on the total amount of the composition, and the hardness is higher than 10g and not higher than 500g.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a water-in-oil emulsion cosmetic composition. [Background technology]

[0002] Makeup cosmetics are cosmetics that enhance the color and texture of the skin. Typical makeup cosmetics include makeup bases, foundations, concealers, blushes, eyebrows, etc. Makeup cosmetics are required to have various functionalities. Among these functionalities, a fresh feel when used, emulsion stability, and ease of use are particularly important. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-22602 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 discloses a solid powder cosmetic containing (A) spherical cellulose and (B) spherical calcium carbonate with apatite attached to its surface in specific contents and ratios. However, there are limitations to achieving a fresh feeling when using powder cosmetics. An object of the present invention is to provide a water-in-oil emulsion cosmetic composition that has a refreshing feel when used, emulsion stability, and ease of use. [Means for solving the problem]

[0005] The present inventors have conducted extensive research into water-in-oil emulsion cosmetic compositions that offer a fresh feel when used, emulsion stability, and ease of use. As a result, they have surprisingly found that by employing a specific composition, it is possible to obtain water-in-oil emulsion cosmetic compositions that offer a fresh feel when used, emulsion stability, and ease of use. The present invention is based on this finding. Thus, the present invention relates to the following: [1] (A) A wax-type solid oil having a melting point of 60°C or higher, (B) one or more nonionic surfactants having an HLB value of 3.5 to 9.5; (C) C12 to C24 higher fatty acids, and (D) Moisture The water-in-oil emulsion cosmetic composition comprises the above, has a water content of 35 mass% or more based on the total amount of the composition, and has a hardness of more than 10 g and not more than 500 g. [2] The water-in-oil emulsion cosmetic composition according to [1], having a hardness of 30 to 400 g. [3] (E) a dispersant, and / or (F) Powder components The water-in-oil emulsion cosmetic composition according to any one of [1] to [2], further comprising: [4] (A) the content of the wax-type solid oil having a melting point of 60°C or higher is 0.5 to 8% by mass based on the total amount of the composition; (B) the content of one or more nonionic surfactants having an HLB value of 3.5 to 9.5 is 0.1 to 15 mass% based on the total amount of the composition; (C) the content of C12 to C24 higher fatty acids is 0.05 to 5 mass% based on the total amount of the composition, and (D) The water content is 35% by mass to 70% by mass based on the total amount of the composition. The water-in-oil emulsion cosmetic composition according to any one of [1] to [3]. [5] (B) The water-in-oil emulsion cosmetic composition according to any one of [1] to [4], wherein the one or more nonionic surfactants having an HLB value of 3.5 to 9.5 are polyglycerol fatty acid ester-based nonionic surfactants having an HLB value of 3.5 to 9.5 and / or sorbitan fatty acid ester-based nonionic surfactants having an HLB value of 3.5 to 9.5. [6] The water-in-oil emulsion cosmetic composition according to any one of [1] to [5], which is a makeup cosmetic composition. [7] The water-in-oil emulsion cosmetic composition according to [6], which is a foundation, a makeup base, a blush, or a concealer. [Effects of the Invention]

[0006] According to the present invention, it is possible to provide a water-in-oil emulsion cosmetic composition that has a fresh feel when used, emulsion stability, and ease of use. DETAILED DESCRIPTION OF THE INVENTION

[0007] The present invention will be described in detail below. In this specification, unless otherwise specified, the expression "a to b" for numerical values ​​a and b is equivalent to "a or more and b or less." In other words, the expression "a to b" includes the numerical values ​​a and b at both ends. In such an expression, when a unit is added only to the numerical value b, the unit is also applied to the numerical value a.

[0008] Component A: A wax-type solid oil with a melting point of 60°C or higher The composition of the present invention contains a wax-type solid oil having a melting point of 60° C. or higher as Component A. When Component A has a melting point of 60° C. or higher, hardness can be imparted to the composition of the present invention. Component A is not particularly limited as long as it has a melting point of 60° C. or higher, and any plant-, mineral-, animal-, or synthetic wax-type solid oil can be used. Specifically, the composition of the present invention can contain, as component A, one or more waxes selected from ceresin, sunflower seed wax, solid paraffin wax, microcrystalline wax, candelilla wax, carnauba wax, beeswax, Japan wax, Ganoderma lucidum, polyethylene wax, polypropylene wax, montan wax, ozokerite wax, rice wax, and silicone wax.

[0009] The melting point of component A is 60°C or higher. If the melting point is indicated in a catalog provided by the raw material manufacturer, the catalog value is used. If there is a range of catalog values, the center value is used as the melting point of component A. The melting point of component A can be 60 to 120°C, 63 to 100°C, 65 to 95°C, 68 to 90°C, 70 to 85°C, or 72 to 80°C.

[0010] The content of component A in the total amount of the composition is not particularly limited as long as the effects of the present invention are obtained, but is preferably 0.5 to 8 mass%, more preferably 0.6 to 6 mass%, even more preferably 0.7 to 5 mass%, even more preferably 0.8 to 4 mass%, and most preferably 2 to 4 mass%. The composition of the present invention may contain an oil component having a melting point of less than 60°C in addition to a wax-type solid oil having a melting point of 60°C or higher, as long as the effects of the present invention can be obtained. The composition of the present invention may contain an oil component that is liquid at room temperature (specifically, 20°C), such as one or more selected from ester oils, silicone oils, hydrocarbon oils, higher alcohols, and higher fatty acids. The composition of the present invention may also contain squalane, hexyl laurate, or the like as an oil component. When the composition of the present invention contains an oily component other than component A, for example, an oily component that is liquid at room temperature (specifically, 20°C), the content of component A based on the total amount of the oily components can be 3 to 30 mass%, 5 to 27 mass%, 8 to 25 mass%, 10 to 22 mass%, 12 to 20 mass%, or 14 to 18 mass%. When the composition of the present invention contains an oily component that is liquid at room temperature (specifically, 20°C), the content of the oily component that is liquid at room temperature (specifically, 20°C) based on the total amount of the oily components can be 3 to 30 mass%, 5 to 27 mass%, 6 to 25 mass%, 7 to 22 mass%, or 10 to 18 mass%. In the composition of the present invention, the total amount of oily components including component A and oily components that are liquid at room temperature (specifically, 20°C) can be 6 to 40 mass%, 8 to 35 mass%, 10 to 30 mass%, or 12 to 28 mass% based on the total amount of the composition.

[0011] Component B: One or more nonionic surfactants with an HLB value of 3.5 to 9.5 The composition of the present invention contains one or more nonionic surfactants having an HLB value of 3.5 to 9.5 as component B. When the nonionic surfactant has an HLB value of 3.5 to 9.5, a desirable emulsified state can be imparted. Component B is not particularly limited as long as it has an HLB value of 3.5 to 9.5, and nonionic surfactants such as polyglycerin fatty acid esters, sorbitan fatty acid esters, sucrose fatty acid esters, glycerin fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene hydrogenated castor oil, polyoxyethylene polyhydric alcohol fatty acid esters, and polyoxyethylene polyoxypropylene alkyl ethers can be used. It is preferable to use polyglycerin fatty acid esters and / or sorbitan fatty acid esters, and it is more preferable to use polyglycerin fatty acid esters. Examples of polyglycerol fatty acid esters include polyglyceryl laurate, polyglyceryl myristate, polyglyceryl stearate, polyglyceryl oleate, polyglyceryl isostearate, polyglyceryl diisostearate, polyglyceryl polyricinoleate, polyglyceryl pentastearate, polyglyceryl pentaisostearate, and polyglyceryl pentaoleate. Polyglyceryl oleate and / or polyglyceryl stearate are preferred. Polyglyceryl oleates with an HLB value of 3.5 to 9.5 include, for example, polyglyceryl-2 oleate (the number indicates the polymerization degree of glycerin), polyglyceryl-3 oleate, and polyglyceryl-4 oleate. Polyglyceryl stearates with an HLB value of 3.5 to 9.5 include, for example, polyglyceryl-2 stearate, polyglyceryl-3 stearate, and polyglyceryl-4 stearate. Preparations containing polyglyceryl-2 oleate, polyglyceryl-2 stearate, and polyhydroxystearic acid (corresponding to the dispersant described below), such as PolyAquol OS2 (Innovacos), may also be used. Preparations containing polyglyceryl-4 oleate and tocopherol, such as S Face O-401P (Sakamoto Pharmaceutical Co., Ltd.), may also be used. Polyglyceryl-2 stearate and polyglyceryl-2 stearate may be used in combination, or polyglyceryl-4 oleate may be used alone. Sorbitan fatty acid esters include sorbitan laurate, sorbitan palmitate, sorbitan stearate, sorbitan isostearate, sorbitan oleate, sorbitan sesquistearate, sorbitan sesquiisostearate, sorbitan sesquioleate, sorbitan trioleate, sorbitan tristearate, sorbitan olivate, and sorbitan coconutate. Sorbitan sesquistearate is preferred.

[0012] The HLB value of ingredient B is 3.5 to 9.5. If the HLB value is listed in a catalog provided by the raw material manufacturer, the catalog value is used. If there is a range of catalog values, the center value is used as the HLB value of ingredient B. The HLB value of ingredient B can be 4.0 to 9.0, 4.5 to 8.0, 5.0 to 7.5, or 5.5 to 6.5.

[0013] The content of component B based on the total amount of the composition is not particularly limited as long as the effects of the present invention are obtained, but is, for example, 0.1 to 15 mass%, preferably 0.2 to 10 mass%, more preferably 0.3 to 8 mass%, even more preferably 0.4 to 7 mass%, even more preferably 0.5 to 6 mass%, and most preferably 1 to 5 mass%.

[0014] Component C: C12-C24 higher fatty acids The composition of the present invention contains a C12 to C24 higher fatty acid as component C. By containing a C12 to C24 higher fatty acid, emulsion stability can be imparted to the composition of the present invention. The higher fatty acid may be saturated or unsaturated, branched or unbranched, and any fatty acid having 12 to 24 carbon atoms can be used. Examples of C12 to C24 higher fatty acids include, but are not limited to, isostearic acid, hydroxystearic acid, lauric myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, lignoceric acid, palmitoleic acid, oleic acid, elaidic acid, ricinoleic acid, eicosenoic acid, erucic acid, linoleic acid, γ-linolenic acid, α-linolenic acid, punicic acid, and stearic acid. The carbon number of the C12 to C24 higher fatty acid is preferably C16 to C20, and the C12 to C24 higher fatty acid is more preferably isostearic acid.

[0015] The content of component C based on the total amount of the composition is not particularly limited as long as the effects of the present invention are obtained, but is preferably 0.05 to 5 mass%, more preferably 0.1 to 4 mass%, even more preferably 0.2 to 3 mass%, and even more preferably 0.3 to 2 mass%.

[0016] 《Component D; Moisture》 The composition of the present invention contains 35% by mass or more of water based on the total mass of the composition as component D. The high water content allows for a refreshing feel when used.

[0017] The content of component D based on the total amount of the composition is not particularly limited as long as the effects of the present invention are obtained, but it can be, for example, 35 to 65 mass%, 40 to 60 mass%, 45 to 58 mass%, or 50 to 55 mass%.

[0018] The mass ratio of the content of component D based on the total amount of oily components based on the total amount of the composition (content of component D / total amount of oily components) can be 1 to 10, 2 to 6, or 3 to 5. Component C corresponds to the oily component. The content of component D based on the total amount of the composition is preferably greater than the total amount of oily components based on the total amount of the composition. The mass ratio of the content of component D based on the total amount of the composition to the content of component A based on the total amount of the composition (content of component D / content of component A) can be 5-50, 10-40, or 15-30.

[0019] Component E: Dispersant The composition of the present invention preferably contains a dispersant as component E. The inclusion of a dispersant can improve the fresh feeling when used. It is more preferable that the dispersant contains polyhydroxystearic acid.

[0020] The content of component E in the total composition is not particularly limited as long as the effects of the present invention are obtained, but is preferably 0.1 to 5 mass%, more preferably 0.2 to 4 mass%, even more preferably 0.3 to 3 mass%, and even more preferably 0.5 to 2 mass%.

[0021] Component F: Powder component The powder component of component F is not limited as long as it is used in the art as a color pigment or extender pigment and does not impair the effects of the present invention. Examples of such powders include inorganic powders (e.g., mica, talc, kaolin, sericite, phlogopite, iron oxide, black iron oxide, yellow iron oxide, red iron oxide, titanium oxide, zinc oxide, iron titanate, aluminum hydroxide, aluminum oxide, hectorite, bentonite, smectite, montmorillonite, vermiculite, magnesium carbonate, calcium carbonate, silica, diatomaceous earth, magnesium silicate, calcium silicate, aluminum silicate, barium silicate, strontium silicate, sodium silicate, barium sulfate, metal tungstate, silicic anhydride, hydroxyapatite, zeolite, boron nitride, manganese violet, cobalt violet, quartz oxide, etc.). Examples of suitable pigments include chromium, chromium hydroxide, cobalt titanate, ultramarine, ferric iron, aluminum powder, copper powder, synthetic fluorphlogopite, etc.), or organic powders (for example, polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, styrene-acrylic acid copolymer resin powder, benzoguanamine resin powder, cellulose powder, organic pigments (for example, Red 2, Blue 1, Blue 2, Red 3, Red 102, Red 104, Red 202, Red 226, Yellow 3, Yellow 4, Yellow 5, Orange 201, Green 201, chlorophyll, β-carotene, carmine, gardenia yellow, etc.), zirconium, barium, aluminum lake, and other organic pigments). The color pigment or extender pigment may or may not be surface-treated, as long as the effects of the present invention can be obtained.

[0022] The content of component F based on the total amount of the composition is not particularly limited as long as the effects of the present invention are obtained, but is preferably 1 to 30 mass%, more preferably 2 to 25 mass%, even more preferably 5 to 20 mass%, and most preferably 8 to 15 mass%.

[0023] 《Optional ingredients》 The composition of the present invention may contain, as appropriate, ingredients that are typically incorporated into cosmetics, such as moisturizers, pH adjusters, vitamins, UV protection ingredients, antioxidants, emulsion stabilizers, etc., within the scope of not impairing the effects of the present invention.

[0024] <<Water-in-oil emulsion cosmetic composition>> The specific product or form of the composition of the present invention is not particularly limited, and includes skin care cosmetics and makeup cosmetics. The composition of the present invention is preferably a makeup cosmetic. Specific examples of the composition of the present invention include foundation, makeup base, sunscreen, mascara, eyebrow makeup, eyeshadow, eyeliner, lipstick, lip gloss, lip liner, blush, and concealer. The composition of the present invention is preferably a foundation, makeup base, blush, or concealer. The term "foundation" also includes all-in-one foundations that combine the functions of foundation and other cosmetics (e.g., makeup base and concealer). The same applies to other all-in-one cosmetics.

[0025] The hardness of the composition of the present invention is greater than 10 g and less than 500 g. Having a hardness in this range makes the composition of the present invention easy to carry around and improves usability. If the hardness is less than 10 g, the fluidity is too high, making it inconvenient to carry around. If the hardness exceeds 500 g, it is difficult to easily scoop out the required amount. Furthermore, by having the hardness of the composition of the present invention be greater than 10 g and less than 500 g, a fresh feel can be obtained when used. The composition of the present invention is preferably semi-solid. A semi-solid means that, for example, when dropped on a table, it does not spread immediately like a liquid, and unlike a solid, it easily changes shape in response to external pressure. Furthermore, when used, the required amount can be easily scooped out by hand. The hardness of the composition of the present invention is preferably 10 to 400 g, more preferably 30 to 400 g, more preferably 40 to 350 g, more preferably 50 to 340 g, more preferably 60 to 330 g, more preferably 70 to 320 g, more preferably 80 to 310 g, even more preferably 90 to 300 g, and most preferably 100 to 300 g. The upper limit may be 250 g or 200 g.

[0026] The conditions and methods for measuring hardness in this specification are as follows: Hardness tester manufacturer: Sun Scientific Co., Ltd. Equipment name: SUN RHEO METER MODEL:CR-3000EX Software name: RHEO DATA ANALYZER PRO Adapter: φ10 disc Mode: MODE1(Depth) Approach distance: 2mm Table movement speed: 20mm Compression, iteration count: 1 10g is filled into a container with a diameter of 42.55mm and a height of 9.55mm at a filling temperature of 70°C ± 5°C, and the measurement is carried out after leaving it to stand in a constant temperature bath at 30°C for 4 hours from the day after filling. Measurement is carried out at a room temperature of 25°C. [Example]

[0027] The present invention will be described in more detail below with reference to examples, but these examples are not intended to limit the scope of the present invention. Unless otherwise specified, % indicates % by mass.

[0028] In this example, a foundation was prepared with the component compositions shown in Tables 1 and 2. The raw materials used are as follows. Oily ingredients Ceresin (melting point 72-76°C, corresponds to ingredient A), Sunflower seed wax (melting point 73.5-79.5°C, corresponds to ingredient A), Waxgrass (melting point 50-55℃), Paraffin (P115) (melting point 46.1-48.8°C), Tri(caprylic / capric / myristic / stearic)glyceryl (melting point 39-42°C), Hexyl laurate (liquid at room temperature), Squalane (liquid at room temperature), Isostearic acid (component C, liquid at room temperature), Phenoxyethanol (liquid at room temperature), Surfactants Polyglyceryl-2 oleate / polyhydroxystearic acid / polyglyceryl-2 stearate (compounded as PolyAquol OS2. Polyglyceryl-2 oleate (HLB value 5.5-6.5, component B), polyhydroxystearic acid (component E), and polyglyceryl-2 stearate (HLB value 5.0, component B) are blended in a ratio of 45:40:15), Sorbitan sesquiisostearate (HLB value 4.5, component B), Polyglyceryl-4 oleate, tocopherol (formulated as S Face O-401P. Polyglyceryl-4 oleate (HLB value 8.8) corresponds to ingredient B, and polyglyceryl-4 oleate and tocopherol are blended in a ratio of 99.95:0.05), Polyglyceryl-10 isostearate (HLB value 13.7), Polyglyceryl-10 laurate (HLB value 15.3). ·powder Titanium oxide (fine particles) Zinc oxide (fine particles) Titanium dioxide (pigment) Iron oxide (yellow iron oxide) Iron oxide (red iron oxide) Iron oxide (black iron oxide) Synthetic Fluorphlogopite (HDI / PPG / Polycaprolactone) Crosspolymer The total amount of the above ingredients is 11.7% by mass or 19.8% by mass.

[0029] The melting points and HLB values ​​of the raw materials used above are all catalog values. Each evaluation item was evaluated using the following methods.

[0030] [Method for measuring hardness] Hardness tester manufacturer: Sun Scientific Co., Ltd. Equipment name: SUN RHEO METER MODEL:CR-3000EX Software name: RHEO DATA ANALYZER PRO Adapter: φ10 disc Mode: MODE1(Depth) Approach distance: 2mm Table movement speed: 20mm Compression, iteration count: 1 10 g was filled into a container with a diameter of 42.55 mm and a height of 9.55 mm at a filling temperature of 70°C ± 5°C, and the measurement was performed after leaving it to stand in a thermostatic bath at 30°C for 4 hours from the day after filling. Measurements were performed at a room temperature of 25°C. 0 to 10g was evaluated as ×, more than 10 but less than 100g as △, more than 100 but less than 200g as ◎, more than 200 but less than 400g as ○, and more than 400 but less than 500g as △.

[0031] [Method for evaluating freshness] A certain amount of the sample was applied to the skin and the cool feeling was evaluated. Samples that gave a particularly fresh feeling were rated as ⊚, samples that gave a fresh feeling were rated as ◯, and samples that gave no fresh feeling were rated as ×.

[0032] [Emulsion stability test] The prepared foundation was stored at 0, 5, 40, or 50°C for 90 days, and the occurrence of sweating (water release) on the surface of the product was visually evaluated. Products that showed no sweating under all conditions were marked with an O, and products that showed sweating under at least one condition were marked with an X.

[0033] The results are shown in Tables 1 and 2 below. [Table 1] [Table 2]

[0034] It was confirmed that Examples 1 to 8, which contained Components A to D, had no problems with freshness, hardness, or emulsion stability. Among them, Examples 1 and 3 to 6, which contained a total of 2.5% by mass of Component A, had particularly desirable hardness. Comparative Examples 1 to 3, which contained a low-melting point wax instead of Component A, showed reduced hardness. Comparative Examples 4 and 5, which contained a nonionic surfactant with a high HLB value instead of Component B, did not emulsify the oil phase and water phase, and did not form a water-in-oil emulsion cosmetic. Comparative Example 6, which did not contain Component C, showed sweating after the storage test and reduced emulsion stability. Therefore, it was found that by blending components A to D, it is possible to prepare a water-in-oil emulsion cosmetic composition that has a fresh feel when used, emulsion stability, and ease of use. [Industrial Applicability]

[0035] According to the present invention, it is possible to provide a water-in-oil emulsion cosmetic composition that has a fresh feel when used, emulsion stability, and ease of use.

Claims

1. (A) a wax-type solid oil agent having a melting point of 60°C or higher; (B) one or more nonionic surfactants having an HLB value of 3.5 to 9.5; (C) C12 to C24 higher fatty acids, and (D) Moisture The water-in-oil emulsion cosmetic composition comprises the above, has a water content of 35 mass% or more based on the total amount of the composition, and has a hardness of more than 10 g and not more than 500 g.

2. 2. The water-in-oil emulsion cosmetic composition according to claim 1, which has a hardness of 30 to 400 g.

3. (E) a dispersant, and / or (F) Powder component The water-in-oil emulsion cosmetic composition according to claim 1 or 2, further comprising:

4. (A) the content of the wax-type solid oil having a melting point of 60°C or higher is 0.5 to 8% by mass based on the total amount of the composition; (B) the content of one or more nonionic surfactants having an HLB value of 3.5 to 9.5 is 0.1 to 15 mass% based on the total amount of the composition; (C) the content of C12 to C24 higher fatty acids is 0.05 to 5% by mass based on the total mass of the composition, and (D) the water content is 35% by mass to 70% by mass based on the total amount of the composition; The water-in-oil emulsion cosmetic composition according to claim 1 or 2.

5. 3. The water-in-oil emulsion cosmetic composition according to claim 1 or 2, wherein (B) the one or more nonionic surfactants having an HLB value of 3.5 to 9.5 are polyglycerol fatty acid ester-based nonionic surfactants having an HLB value of 3.5 to 9.5 and / or sorbitan fatty acid ester-based nonionic surfactants having an HLB value of 3.5 to 9.

5.

6. 3. The water-in-oil emulsion cosmetic composition according to claim 1, which is a makeup cosmetic composition.

7. The water-in-oil emulsion cosmetic composition according to claim 6, which is a foundation, a makeup base, a blush, or a concealer.

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