Oil-in-water emulsified cosmetic

Abstract

This invention provides an oil-in-water emulsion cosmetic that can stably incorporate an oil with an IOB value of 0.2 to 0.8 and which is solid at 25°C into a liquid oil-in-water emulsion cosmetic, providing an excellent user experience with no stickiness, tightness, or penetration. This invention is an oil-in-water emulsion cosmetic containing: (A) an oil with an IOB value of 0.2 to 0.8 and which is solid at 25°C; (B) an oil with an HSP distance Ra of less than 7.0 from component (A) and which is liquid at 25°C; (C) one or more components selected from the group consisting of phospholipids and lysophospholipids; and (D) one or more components selected from ethanol and polyols with an IOB value of 1.5 to 5, wherein the average particle size of the emulsion droplets is less than 400 nm.

Description

Technical Field

[0001] This invention relates to an oil-in-water emulsion cosmetic. Background Technology

[0002] As a cosmetic or topical skin agent, a cosmetic-related technology has been disclosed in which various solid oils are stably formulated as active ingredients in a solid oil form, and also impart a firming effect. However, when solid oils are formulated into oil-in-water emulsion cosmetics or water-based cosmetics, the solid oils are prone to precipitation or emulsification (emulsification, layering), resulting in stabilization problems. Furthermore, the solid oils are also prone to causing a sticky feeling, leading to issues with the user experience. In contrast, techniques have been disclosed for stably formulating glycyrrhetinic acid derivatives into emulsion compositions by combining fatty acid esters with carbon numbers of 10 to 18 with water-soluble surfactants, etc. (see, for example, Patent Document 1), or for stably formulating them into cosmetics by including liposomes containing cholesterol or phytosterols, stearyl glycyrrhetinate (also known as "stearyl glycyrrhetinate" or "stearyl glycyrrhetinate"), etc. (see, for example, Patent Document 2), and for stearyl glycyrrhetinate emulsion compositions with excellent usability by combining specific ester oils with alkyl-modified carboxyvinyl polymers (see, for example, Patent Document 3).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2013-224290

[0006] Patent Document 2: Japanese Patent Application Publication No. 2023-32103

[0007] Patent Document 3: Japanese Patent Application Publication No. 2013-173728 Summary of the Invention

[0008] The problem the invention aims to solve

[0009] However, in the technology involving emulsified compositions in Patent Document 1, a sticky feeling is generated due to the need for surfactants. Furthermore, after preparing an emulsified composition that can maintain its stability over time only at low temperatures such as 4°C, cosmetics are obtained by formulating only a small amount of this emulsified composition. From the viewpoint of high-temperature stability, the stable formulation of solid oils such as stearyl glycyrrhetinic acid ester is not sufficient.

[0010] In the cosmetic composition related technology of Patent Document 2, there is a problem that the liposomes are used as the target and the oily components cannot be fully combined.

[0011] Regarding the technology involving emulsified compositions in Patent Document 3, although the user experience is excellent with no stickiness or tightness, there has been little attention paid to the stable formulation of water-soluble polymers that need to be used as viscosity modifiers in low-viscosity liquids such as lotions with better penetration.

[0012] In particular, when formulating oil-in-water emulsions with amphiphilic properties such as stearyl glycyrrhetinic acid ester, cholesterol, or ceramide, the solid oils are prone to gelation and other instability problems due to their orientation at the emulsion interface, making stable formulation even more difficult.

[0013] The main technical problem of this invention is to obtain an oil-in-water emulsion cosmetic that can stably blend an oil with an IOB value (Inorganic Organic Balance) of 0.2 to 0.8 and which is solid at 25°C into a liquid oil-in-water emulsion cosmetic, and provides an excellent user experience with no stickiness, no tightness, no penetration, etc.

[0014] means for solving problems

[0015] Through in-depth research, the inventors have discovered that by selecting oils based on Hansen Solubility Parameters (HSP) to prepare emulsified oil-in-water emulsion cosmetics, cosmetics with significantly superior stability in formulation, solid oils with an IOB value of 0.2–0.8 at 25°C, and excellent user experience, including no stickiness, tightness, or penetration, can be obtained.

[0016] That is, the present invention is as follows.

[0017] [1] A water-in-oil emulsion cosmetic is provided, which contains: (A) An oil with an IOB value of 0.2 to 0.8 and which is solid at 25°C; (B) An oil that has an HSP distance Ra of less than 7.0 from component (A) and is liquid at 25°C; (C) Select one or more from the group consisting of free phospholipids and lysophospholipids; and (D) Select one or more from the group consisting of ethanol and polyols with an IOB value of 1.5 to 5. The average particle size of the emulsion droplets is less than 400 nm.

[0018] [2] Provides an oil-in-water emulsion cosmetic as described in [1], wherein the ingredient (C) contains lysophospholipids.

[0019] [3] Provide an oil-in-water emulsion cosmetic as described in [1] or [2], wherein the mass ratio of the content of the ingredient (C) to the total content of the ingredient (A) and the ingredient (B) (C) / {(A)+(B)} is 0.03 to 1.0.

[0020] [4] Provide an oil-in-water emulsion cosmetic as described in [1] or [2], wherein the content of ingredient (D) is 5% to 40% by mass relative to the total amount of the oil-in-water emulsion cosmetic.

[0021] [5] Provides an oil-in-water emulsion cosmetic as described in [1] or [2], which also contains the ingredient (E) erythritol.

[0022] [6] Provide an oil-in-water emulsion cosmetic as described in [1] or [2], having a viscosity of 1 mPa·s to 4000 mPa·s at 30°C.

[0023] [7] Provides an oil-in-water emulsion cosmetic as described in [1] or [2], which is formed by coating or impregnating a sheet.

[0024] Invention Effects

[0025] The water-in-oil emulsion cosmetic of the present invention can stably contain an oil with an IOB value of 0.2 to 0.8 and which is solid at 25°C, thus providing excellent firming effect. In addition, it can also prepare fine emulsion droplets, resulting in a penetrating yet non-sticky feel, and exhibits excellent stability over time. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described in detail below. However, the present invention is not limited to the preferred embodiments described below, and modifications can be freely made within the scope of the present invention.

[0027] Furthermore, unless otherwise stated, percentages in this specification are markings based on quality standards. Also, when using "~" to indicate a numerical range in this specification, the range should include the values ​​at both ends.

[0028] The component (A) used in this invention is an oil with an IOB value of 0.2 to 0.8 and is solid at 25°C.

[0029] Here, "solid at 25°C" means that it is non-fluid at 25°C and atmospheric pressure. In addition to being solid at 25°C and atmospheric pressure, it also includes a semi-solid state that is non-fluid at 25°C and atmospheric pressure but becomes fluid when a certain amount of force is applied.

[0030] The component (A) used in this invention can be a single component or two or more components used in any ratio. When there are two or more components (A), they are assumed to each have an IOB value of 0.2 to 0.8 and be solid at 25°C.

[0031] The component (A) used in this invention is not particularly limited as long as it is an oil with an IOB value of 0.2 to 0.8 and is solid at 25°C.

[0032] Examples of such oils include: ultraviolet absorbers such as bis(ethylhexyloxy)phenol methoxyphenyl triazine (IOB value = 0.43), hexyl diethylaminohydroxybenzoyl benzoate (IOB value = 0.68), and tert-butylmethoxydibenzoylmethane (IOB value = 0.47); stearyl glycyrrhetinic acid ester (IOB value = 0.33), ceramide NG (IOB value = 0.46), ceramide NP (IOB value = 0.70), cholesterol (IOB value = 0.35), and phytosterols (IOB value = 0.30–0.35).

[0033] Commercially available products include, for example, TINOSORB S (manufactured by BASF), phytosterol QI (manufactured by Tama Biochemical Co., Ltd.), Nissui Marine cholesterol (manufactured by Nippon Suisan Co., Ltd.), CERAMIDE2 (manufactured by Croda Japan Co., Ltd.), and CERAMIDE3 (manufactured by Cosmo Farm Co., Ltd.).

[0034] Here, the so-called IOB value refers to the ratio of the inorganic value (IV) to the organic value (OV) in the organic concept map, that is, "inorganic value (IV) / organic value (OV)" (see Fujita Mu's organic concept map: Chemical Field, Vol. 11, No. 10 (1957), pp. 719-725).

[0035] The ingredient (A) used in this invention is difficult to formulate into a water-in-oil emulsion cosmetic with an average droplet diameter of less than 400 nm using conventional techniques, but it can be preferred to use in this invention.

[0036] Regarding the IOB value of component (A) used in this invention, from the viewpoint of providing a good firming feel and non-stickiness, it is preferably 0.25 or higher, more preferably 0.3 or higher; from the viewpoint of preventing gelation or precipitation, it is preferably 0.5 or lower, more preferably 0.4 or lower. In this case, the IOB value is the IOB value of that component (A) when there is only one component (A), and the IOB value of each component (A) when there are two or more components (A).

[0037] As the component (A) used in this invention, solid oils having a steroidal skeleton (cholesterol, phytosterol) or a triterpenoid skeleton (stearyl glycyrrhetinic acid ester), such as cholesterol, phytosterol, and stearyl glycyrrhetinic acid ester, are preferred, with stearyl glycyrrhetinic acid ester being particularly preferred. These components provide superior performance in preventing gelation or precipitation.

[0038] Here, stearyl glycyrrhetinate is a compound obtained by ester bonding stearic acid with the hydroxyl group of glycyrrhetinic acid, obtained by hydrolysis of glycyrrhetinic acid contained in licorice, etc. Its systematic name is (20S)-3β-hydroxy-11-oxo-5α-oleanolic-12-en-29-octadecyl ester, and its molecular formula is C2. 48 H 82 O4. Glycyrrhetinic acid has a planar molecular structure, with positions 3 and 11 similar to those of cortisone, thus exhibiting anti-inflammatory properties. Stearyl glycyrrhetinic acid ester is an addition product of stearic acid and can be used as an anti-inflammatory ingredient in skin topical agents or cosmetics where safety is a concern.

[0039] There is no particular limitation on the content of ingredient (A) used in this invention, but as a lower limit relative to the total amount of the water-in-oil emulsion cosmetic, it is preferably 0.001% by mass (hereinafter referred to as %) or more, more preferably 0.01% or more, and even more preferably 0.1% or more. As an upper limit, it is preferably 10% or less, more preferably 5% or less, and even more preferably 3% or less. As a range, it is preferably 0.001 to 10%, more preferably 0.01 to 5%, and even more preferably 0.1 to 3%. Within this range, it is more preferable from the viewpoint of not causing gelation or precipitation, having a good firming feel, and being non-sticky.

[0040] There are no particular limitations on the component (B) used in this invention, as long as it is an oil with a Hansen solubility parameter (HSP) of less than 7.0 from that of component (A) and is liquid at 25°C.

[0041] Here, "liquid at 25°C" means that it is fluid at 25°C and atmospheric pressure.

[0042] Here, the Hansen solubility parameter (also known as "HSP") is a value published by Charles M. Hansen in 1967 for predicting the solubility of substances. It is a parameter based on the idea that "two substances with similar intermolecular interactions are likely to dissolve in each other." HSP consists of the following three parameters (unit: MPa). 1 / 2 )constitute.

[0043] d d: Energy generated by intermolecular dispersion forces

[0044] d p: Energy generated by intermolecular dipole interactions

[0045] d h: Energy generated by intermolecular hydrogen bonds

[0046] These three parameters can be viewed as coordinates in three-dimensional space (Hansen space), indicating that when the HSPs of two substances are placed in Hansen space, the closer the distance between the two points, the easier it is for them to dissolve in each other. In other words, HSPs can be used as an indicator of affinity.

[0047] The concept of HSPs is explained in detail in publications such as the March 2010 issue of *Chemical Industry* (Chemical Industry Press). It describes how HSPs for various substances can be obtained using personal computer software such as "HSPiP: Hansen Solubility Parameters in Practice". This disclosure uses HSPs obtained using version 5.3.02 of the personal computer software "HSPiP: Hansen Solubility Parameters in Practice".

[0048] Furthermore, the distance Ra of the Hansen solubility parameter (HSP) can be calculated using the Ra calculation function in "HSPiP: Hansen Solubility Parameters in Practice," or it can be expressed as follows: That is, set the coordinates of the HSP of component X as ( d dX、 d pX, d When hX), the coordinates relative to the HSP of component Y ( d dY、 d pY、 d The HSP distance Ra (unit: MPa) of hY) 1 / 2 The value can be calculated using the following formula.

[0049] Ra=[4×( d dX- d dY) 2 +( d pX- d pY) 2 +( d hX- d hY) 2 ] 1 / 2

[0050] Regarding component (B) used in this invention, when the coordinates of the HSP of component (A) are set as ( d da、 d pa、 d When (ha), the coordinates of the HSP of component (B) are (ha). d db、 d pb, d hb) satisfies the following calculation formula.

[0051] Ra=[4×( d da- d db) 2 +( d pa- d pb) 2 +( d ha- d hb) 2 ] 1 / 2 ≤7.0

[0052] The component (B) used in this invention can be a single ingredient or two or more ingredients used in any ratio. When there are two or more components (B), each is an oil with an HSP distance Ra of 7.0 or less from component (A) and is liquid at 25°C. Alternatively, when there are two or more components (A), it is sufficient that the HSP distance Ra from any one component (A) is 7.0 or less.

[0053] As an oil that is liquid at 25°C, there are no particular restrictions. It can be any of the oils commonly used in cosmetics. The HSP distance Ra between the oil and ingredient (A) can be calculated. If Ra is 7.0 or less, it can be used as ingredient (B).

[0054] Examples of oils that are liquid at 25°C include: hydrocarbon oils, ester oils, silicone oils, natural animal and vegetable oils, and semi-synthetic oils.

[0055] As a hydrocarbon oil, it can be either linear or branched, and it can be either volatile or non-volatile. Examples of hydrocarbon oils include: isododecane, squalane, synthetic squalane, vegetable squalane, mineral oil (liquid paraffin), isoalkanes, hydrogenated polyisobutylene, etc.

[0056] Examples of ester oils include: isobutyl isostearate, decyl isostearate, methyl heptyl isostearate, tricyclodecane methyl isononanoate, heptyl undecenoate, benzyl erucate, cetyl octanoate, stearyl caprylic acid, polyglycerol-3 diisostearate, neopentyl glycol diisononanoate, neopentyl glycol diethylhexanoate, octyl stearate, octyl dodecyl stearate, diethylhexyl sebacate, dibutyl octyl sebacate, glyceryl tris(2-ethylhexyl) palmitate, methyl heptyl palmitate, dipentaerythritol hexaisononanoate, and myreth-3 myristate. Myristate, methyl heptyl myristate, octyl laurate, methyl heptyl laurate, trioleate phosphate, tricetyl phosphate, diethylhexyl carbonate, oleate erucic acid, isostearate isostearate, hexyl decyl isostearate, oleate oleate, isocetyl stearate, isostearate palmitate, octyl dodecyl myristate, isostearate isocetyl myristate, isoctyl oleate, decyl oleate, octyl dodecyl stearate, cetearyl alcohol isonononate (cetearyl) Isononanoate), cetyl decanoate, ethylhexyl stearate, stearyl heptanoate, cetyl ethylhexanoate, hexyl decyl ethylhexanoate, octyl dodecyl neopentanoate, octyl palmitate, butyl stearate, isostearate neopentanoate, isopropyl isostearate, ethyl isostearate, isotriadecyl isononanoate, PG distearate, stearoyloxystearate isocetyl decanoate, PG diisostearate, PG dioleate, ethylene dioleate, ethylene distearate, pentaerythritol tetraisostearate, trimethylolpropane triisostearate Ester, Isopropyl palmitate, Polyglycerol-2 tetraisostearate, Hexyl laurate, Cetyl acetate, Isodecyl isononanoate, Ethylhexyl isononanoate, PEG-3 trimethylolpropane tristearate, Tridecyl neopentanoate, Isopropyl myristate, Isoamyl laurate, PEG-3 trimethylolpropane triisostearate, Isononyl isononanoate, PEG-3 glyceryl triisostearate, Isodecyl neopentanoate, PEG-2 distearate, PEG-4 glyceryl tristearate, Cetyl castor oil, Dioctyl carbonate, PEG-2 diisostearate, PEG-2 dioleate, Neopentyl glycol didecanoate, Dioctyl dodecyl stearoyl glutamate, Polyglycerol-2 triisostearate, Diisostearate malate, Glyceryl diisostearate, Cetyl ether-3 stearateStearate, PEG-4 sorbitan triisostearate, PEG-5 glyceryl triisostearate, PEG-3 distearate, PEG-3 diisostearate, PEG-6 glyceryl tristearate, PEG-5 trimethylolpropane trimyristate, steareth-4 stearate, PEG-3 dipalmitate, PEG-4 distearate, pentaerythritol tetra(ethylhexanoate), triethyl hexanoate, etc.

[0057] Examples of silicone oils include: methylphenyl polysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, methyl polytrimethylsiloxane (Methyl Trimethicone), polyether-modified methyl polysiloxane, oil-based modified methyl polysiloxane, polyvinylpyrrolidone-modified methyl polysiloxane, octamethylcyclotetrasiloxane, dodecamethylcyclohexasiloxane (Dodecamethylcyclohexasiloxane), hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, caprylyl trimethicone, methylphenyl polysiloxane, and dimethiconol, etc.

[0058] Examples of natural and semi-synthetic oils include rapeseed oil, meadowfoam seed oil, and jojoba seed oil.

[0059] As mentioned above, depending on the component (A), the corresponding component (B) is different.

[0060] For example, when component (A) is stearyl glycyrrhetinic acid ester, components (B) may include: pentaerythritol tetra(ethylhexanoate) ester (Ra=2.81), squalane (Ra=5.28), mineral oil (Ra=3.80), triisooctanoic acid glyceride (Ra=3.69), isostearic acid (Ra=5.20), ethylhexyl methoxycinnamate (Ra=3.59), jojoba seed oil (Ra=4.05), hydrogenated polydecene (Ra=4.9), ethyl oleate (Ra=4.15), olive fruit oil (Ra=3.57), etc.

[0061] When component (A) is phytosterol, components (B) can include: pentaerythritol tetra(ethylhexanoate) ester (Ra=1.89), squalane (Ra=4.53), mineral oil (Ra=2.88), triisooctanoic acid glyceride (Ra=1.54), isostearic acid (Ra=2.50), ethylhexyl methoxycinnamate (Ra=2.33), octyldodecanool (Ra=4.59), jojoba seed oil (Ra=2.60), hydrogenated polydecene (Ra=4.29), ethyl oleate (Ra=2.16), olive fruit oil (Ra=1.61), etc.

[0062] When component (A) is cholesterol, possible components (B) include: pentaerythritol tetra(ethylhexanoate) ester (Ra=2.36), squalane (Ra=5.00), mineral oil (Ra=3.37), triisooctanoic acid glyceride (Ra=1.69), isostearic acid (Ra=2.43), ethylhexyl methoxycinnamate (Ra=1.88), octyldodecanool (Ra=4.22), jojoba seed oil (Ra=3.03), hydrogenated polydecene (Ra=4.77), ethyl oleate (Ra=2.33), olive fruit oil (Ra=1.97), etc.

[0063] When ingredient (A) is ceramide NG, possible ingredients (B) include: triisooctanoic acid glyceryl ester (Ra=5.49), isostearic acid (Ra=4.98), ethylhexyl methoxycinnamate (Ra=4.13), octyldodecanool (Ra=3.22), ethyl oleate (Ra=5.71), olive fruit oil (Ra=6.34), etc.

[0064] When component (A) is ceramide NP, components (B) can include: triisooctanoic acid glyceryl ester (Ra=6.17), isostearic acid (Ra=5.73), ethylhexyl methoxycinnamate (Ra=4.56), octyldodecyl alcohol (Ra=3.92), ethyl oleate (Ra=6.40), etc.

[0065] When component (A) is bis(ethylhexyloxy)phenol methoxyphenyl triazine, components (B) can include: ethylhexyl methoxycinnamate (Ra=6.31), octyldodecyl alcohol (Ra=6.40), etc.

[0066] When component (A) is hexyl diethylaminohydroxybenzoylbenzoate, components (B) can include: ethylhexyl methoxycinnamate (Ra=5.06), octyldodecanool (Ra=6.27), etc.

[0067] When component (A) is tert-butylmethoxydibenzoylmethane, components (B) may include ethylhexyl methoxycinnamate (Ra=4.88), etc.

[0068] In this invention, the HSP distance Ra between component (B) and component (A) is 7.0 or less, but from the viewpoint of preventing gelation and precipitation, Ra is preferably 4.5 or less, and more preferably 3.0 or less. There is no particular limitation on the lower limit of the HSP distance Ra, and it can also be 0.

[0069] When there are two or more components (B) used in this invention, it is preferable that any one component (B) satisfies the preferred range related to the HSP distance Ra described above. Furthermore, it is more preferable that all components (B) satisfy the preferred range related to the HSP distance Ra described above.

[0070] When there are two or more components (A) used in this invention, for any one component (A), it is preferable to have a component (B) that satisfies the preferred range related to the HSP distance Ra described above; furthermore, for all components (A), it is more preferable to have a component (B) that satisfies the preferred range related to the HSP distance Ra described above.

[0071] The HSP distance Ra of each component (A) and the oil that is liquid at 25°C is shown in Table 1.

[0072] [Table 1]

[0073] There is no particular limitation on the content (mass) of component (B) used in this invention, but relative to the total amount of the water-in-oil emulsion cosmetic, the lower limit is preferably 0.1% or more, more preferably 1% or more, and even more preferably 2% or more. The upper limit is preferably 15% or less, more preferably 10% or less, and even more preferably 5% or less. The range is preferably 0.1% to 15%, more preferably 1% to 10%, and even more preferably 2% to 5%. Within this range, it is preferred from the viewpoint of no gelation or precipitation, no emulsification, no stickiness, and no permeability.

[0074] The mass ratio of the content of any one of the components (A) used in this invention (hereinafter referred to as "specific component (A)") to the content of component (B) (hereinafter referred to as "specific component (B)") whose HSP distance Ra from the specific component (A) is 7.0 or less [content of specific component (A) / content of specific component (B)] is not particularly limited, but a lower limit is preferably 0.001 or more, more preferably 0.01 or more. An upper limit is preferably 1.0 or less, more preferably 0.7 or less, and even more preferably 0.5 or less. A range is preferably 0.001 to 1.0, more preferably 0.01 to 0.7, and even more preferably 0.01 to 0.5. Within this range, it is more preferable from the viewpoint that gelation or precipitation does not occur, there is no stickiness, and there is a firming sensation.

[0075] When calculating the mass ratio, in the case where there is one component (A) and one component (B) used in this invention, the content of a specific component (A) is the content of that one component (A), and the content of a specific component (B) is the content of that one component (B).

[0076] Furthermore, in the case where there is one component (A) and two or more components (B) used in this invention, since the HSP distance Ra between any component (B) and that component (A) is 7.0 or less, the content of a specific component (A) is the content of that component (A), and the content of a specific component (B) is the total content of all components (B).

[0077] When there are two or more components (A) used in this invention, it is preferable that the mass ratio between at least one component (A) and a component (B) (specific component (B)) whose HSP distance Ra relative to the component (A) is 7.0 or less is satisfied with the preferred conditions related to the lower limit, upper limit and range; more preferably, the mass ratio between all components (A) and a component (B) (specific component (B)) whose HSP distance Ra relative to each component (A) is 7.0 or less is satisfied with the preferred conditions related to the lower limit, upper limit and range.

[0078] The component (C) used in this invention is selected from one or more of the group consisting of phospholipids and lysophospholipids.

[0079] Here, phospholipids refer to substances with a structure in which glycerol or sphingosine forms a central backbone, bonded to fatty acids and phosphoric acid, and the phosphoric acid is ester-bonded to alcohols. Lysophospholipids refer to substances obtained by removing a fatty acid group from phospholipids. Both phospholipids and lysophospholipids can be hydrogenated compounds.

[0080] The component (C) used in this invention may be one or two or more in any ratio.

[0081] Fatty acids that constitute phospholipids and lysophospholipids include saturated and unsaturated carboxylic acids with 7 to 22 carbon atoms, preferably 14 to 20 carbon atoms.

[0082] In addition, alcohols that make up phospholipids and lysophospholipids usually contain nitrogen, such as choline, ethanolamine, inositol and serine.

[0083] There are no particular limitations on the ingredient (C) used in this invention, and ingredients commonly used in cosmetics can be used. Examples include: soy lecithin, hydrogenated soy lecithin, egg yolk lecithin, hydrogenated egg yolk lecithin, sunflower lecithin, hydrogenated sunflower lecithin, and other lecithin (including hydrogenated lecithin). In addition, ingredient (C) can also be lysophospholipids (including hydrogenated lysophospholipids). From the viewpoint of no gelation or precipitation, no emulsification, and no permeability, it is preferable to use phospholipids (unhydrogenated), hydrogenated phospholipids, and hydrogenated lysophospholipids, and more preferably to use a combination of phospholipids (unhydrogenated) and hydrogenated lysophospholipids, or a combination of hydrogenated phospholipids and hydrogenated lysophospholipids.

[0084] Phospholipids (unhydrogenated) that are commercially available products include, for example, J-lecithin CLO (manufactured by J-Oil Mills Co., Ltd.).

[0085] Commercially available hydrogenated phospholipids include, for example: LECINOL S-10, LECINOL S-10EZ, LECINOLS-10M, LECINOL S-10EX, LECINOL S-PIE (all manufactured by Nikko Chemical Co., Ltd.), COATSOME NC-21 (manufactured by NOF Corporation), Phospholipon 100H, Phospholipon 90H, Phospholipon 80H, Phospholipon 90G (all manufactured by Phospholipid Corporation), etc.

[0086] Examples of commercially available hydrogenated lysophosphatidylcholine include LP70H (manufactured by Nippon Seika Co., Ltd.), SLP-WHITE LYSO H, and SLP-LPC 70H (manufactured by Tsuji Oil Co., Ltd.).

[0087] As component (C) used in this invention, a mixture of phospholipids and phytosterols or cholesterol may also be used. Commercially available products of such mixtures include, for example, PHYTOCOMPO-PP (hydrogenated soybean phospholipid-phytosterol mixture) (manufactured by Nippon Seika Co., Ltd.) and COMPOSITE-PC (hydrogenated soybean phospholipid-cholesterol mixture) (manufactured by Nippon Seika Co., Ltd.).

[0088] There is no particular limitation on the content (mass) of ingredient (C) used in this invention, but relative to the total amount of the water-in-oil emulsion cosmetic, the lower limit is preferably 0.05% or more, more preferably 0.1% or more, and even more preferably 0.2% or more. The upper limit is preferably 10% or less, more preferably 5% or less, and even more preferably 3% or less. The range is preferably 0.05 to 10%, more preferably 0.1 to 5%, and even more preferably 0.2 to 3%. Within this range, it is preferred from the viewpoint of no gelation or precipitation, no emulsification, no stickiness, and no permeability.

[0089] There is no particular limitation on the mass ratio (C) / {(A)+(B)} of the content of component (C) used in this invention relative to the total content of components (A) and (B) used in this invention, but a lower limit is preferably 0.03 or more, more preferably 0.05 or more, and even more preferably 0.1 or more. An upper limit is preferably 1.0 or less, more preferably 0.7 or less, and even more preferably 0.3 or less. A range is preferably 0.03 to 1.0, more preferably 0.05 to 0.7, and even more preferably 0.1 to 0.3. Within this range, it is preferred from the viewpoint of no emulsification, no stickiness, and no permeability.

[0090] When calculating the mass ratio, if there are two or more components (A) used in this invention, the content of component (A) is set as the sum of their contents; if there are two or more components (B) used in this invention, the content of component (B) is set as the sum of their contents; if there are two or more components (C) used in this invention, the content of component (C) is set as the sum of their contents.

[0091] The component (D) used in this invention is selected from one or more polyols consisting of ethanol and polyols with an IOB value of 1.5 to 5. Here, the IOB value of ethanol is 2.5.

[0092] The component (D) used in this invention can be a single component or a combination of two or more components in any ratio. When two or more polyols are used, the IOB values ​​of each polyol are 1.5 to 5.

[0093] Examples of polyols with IOB values ​​of 1.5 to 5 include: propylene glycol (IOB value = 3.3), dipropylene glycol (IOB value = 1.8), 1,3-butanediol (IOB value = 2.5), 1,2-pentanediol (IOB value = 2.0), glycerol (IOB value = 5.0), diglycerol (IOB value = 3.5), and PEG-8 (MW400) (IOB value = 2.3).

[0094] From the viewpoint of no gelation or precipitation and no stickiness, ethanol, 1,3-butanediol, dipropylene glycol, glycerol, and diglycerol are preferred, and ethanol, 1,3-butanediol, and glycerol are more preferred.

[0095] There is no particular limitation on the content (mass) of ingredient (D) used in this invention, but as a lower limit, it is preferably 5% or more, more preferably 10% or more, and even more preferably 15% or more, relative to the total amount of the water-in-oil emulsion cosmetic. As an upper limit, it is preferably 40% or less, more preferably 30% or less, and even more preferably 25% or less. As a range, it is preferably 5% to 40%, more preferably 10% to 30%, and even more preferably 15% to 25%. Within this range, it is preferred from the viewpoint of no gelation or precipitation, no emulsification, and no sense of penetration.

[0096] The water-in-oil emulsion cosmetic of the present invention preferably also contains ingredient (E) erythritol. Erythritol is a type of sugar alcohol, also known as erythritol or erythritol, and has long been used as a moisturizer in cosmetics. Commercially available products include erythritol (manufactured by Busan Food Science Co., Ltd.) and Erythritol (manufactured by Busan Food Science Co., Ltd.).

[0097] The content (by mass) of component (E) used in this invention, relative to the total amount of the oil-in-water emulsion cosmetic, is preferably 0.01% or more as a lower limit, more preferably 0.1% or more, and even more preferably 0.5% or more. The upper limit is preferably 15% or less, more preferably 10% or less, and even more preferably 5% or less. The range is preferably 0.01 to 15%, more preferably 0.1 to 10%, and even more preferably 0.5 to 5%. Within this range, it is more preferable from the viewpoint of non-stickiness.

[0098] The water-in-oil emulsion cosmetic of the present invention may contain water as a component constituting the aqueous phase (aqueous component). Examples of water include purified water, hot spring water, ion-exchanged water, deep water, tap water, and steam distilled water from plants; one type of water may be used, or two or more may be used in any ratio. There are no particular limitations on the water content (mass), which can be set according to the content of other components. For example, relative to the total amount of the water-in-oil emulsion cosmetic, it may be set to 50% or more, or 90% or less. The aqueous component may include water-soluble components. As a water-soluble component, it may be component (D).

[0099] In the water-in-oil emulsion cosmetic of the present invention, in addition to the above-mentioned components (A) to (D), any component (E), and water, other components may be included within a range that does not impair the effects of the present invention. Examples of other components include those commonly used in cosmetics, such as oily components as base materials or moisturizing ingredients, powders, surfactants for powder dispersion or texture adjustment, ultraviolet absorbers, moisturizers, anti-fading agents, antioxidants, defoamers, cosmetic ingredients (e.g., vitamins), anti-inflammatory agents, medicinal herbs, preservatives (e.g., parabens, phenoxyethanol, etc.), fragrances, etc., which may be appropriately included within a range that does not impair the effects of the present invention.

[0100] As an oily ingredient, there are no particular restrictions on any ingredient other than ingredient (A) and ingredient (B), and ingredients commonly used in cosmetics can be used. Oily ingredients are not limited by their origin or properties; the origin can be any of animal oils, vegetable oils, synthetic oils, etc., and the properties can be any of solid oils, semi-solid oils, liquid oils, etc. Examples of oily ingredients include higher alcohols, fluorinated oils, and oily gelling agents. Specifically, examples include: decamethylcyclopentasiloxane, fluorinated organopolysiloxanes and other silicones, perfluorodecane, perfluorooctane, perfluoropolyethers and other fluorinated oils, starch fatty acid esters, 12-hydroxystearic acid, calcium stearate and other oily gelling agents, etc.

[0101] There are no particular restrictions on the powder used; powders commonly used in cosmetics can be used. The powder is not particularly limited by shape (plate-like, spindle-shaped, needle-like, etc.), particle size (microparticles, pigment-grade, etc.), or particle structure (porous, non-porous, etc.). Examples include inorganic powders, organic powders, and composite powders. Specifically, examples include inorganic powders such as silica, metal oxides, talc, and sericite; organic powders such as magnesium stearate, zinc stearate, N-acyl lysine, polyethylene terephthalate, nylon, polymethyl methacrylate, and methylsiloxane network polymers; and composite powders such as silica containing microparticle titanium dioxide and silica containing microparticle zinc oxide. One or more of these can be used, or two or more can be combined in any ratio. These powders can be composed of the same or two or more composites, or they can be powders produced through surface treatment with fluorine compounds, metal soaps, surfactants, oils, hydrocarbons, etc.

[0102] From the perspective of adjusting the feel, powders such as silicone powder, talc, sericite, silica, mica, kaolin, calcium carbonate, alumina, polyethylene powder, polymethyl methacrylate, and nylon powder can be preferred.

[0103] In addition, from the viewpoint of providing ultraviolet protection, metal oxide powders can be preferred, such as zinc oxide, titanium oxide, cerium oxide, etc.

[0104] You can use one of them or combine two or more in any ratio.

[0105] There are no particular restrictions on the surface treatment method when performing surface treatment on powders. Well-known surface treatment methods can be used, such as: silica treatment, alumina treatment, aluminum hydroxide treatment, fluorine compound treatment, silicone treatment, silicone resin treatment, side chain treatment, silane coupling agent treatment, titanium coupling agent treatment, silane treatment, oil treatment, N-acylated lysine treatment, polyacrylic acid treatment, metal soap treatment, acrylic resin treatment, metal oxide treatment, etc.

[0106] The powder content (by mass) relative to the total amount of the oil-in-water emulsion cosmetic is preferably 5% or less, more preferably 1% or less. Within this range, the desired effect can be achieved while avoiding increased friction and dryness in the oil-in-water emulsion cosmetic.

[0107] As a surfactant, there are no particular restrictions on any substance other than ingredient (C), and commonly used ingredients in cosmetics can be used. Examples include nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants.

[0108] As a UV absorber, there are no particular restrictions on the substances other than ingredient (A), and commonly used ingredients in cosmetics can be used. Examples of UV absorbers include benzophenones, p-aminobenzoic acid (PABA), cinnamic acid, salicylic acid, and oxybenzone.

[0109] As a moisturizer, there are no particular restrictions; moisturizers commonly used in cosmetics can be used, such as proteins, mucopolysaccharides, collagen, elastin, keratin, etc.

[0110] There are no particular restrictions on the use of antioxidants; antioxidants commonly used in cosmetics can be used, such as α-tocopherol and ascorbic acid.

[0111] There are no particular limitations on the manufacturing method of the water-in-oil emulsion cosmetic of the present invention, and it can be prepared by known methods. For example, after emulsifying and mixing an aqueous component containing water and the remainder of component (D) into an oil phase obtained by heating and dissolving components (A) to (C) and part or all of component (D), the water-in-oil emulsion cosmetic of the present invention can be obtained by micronization treatment using a high-pressure emulsification and dispersion device such as a microfluidizer or a wet micronization device such as an ulimizer or a nanovaporizer. The processing pressure during micronization treatment is preferably 50 MPa to 200 MPa. When using component (E) or other components, they can be formulated at an appropriate time.

[0112] The average particle size of the emulsion droplets in the oil-in-water emulsion cosmetic of the present invention is 400 nm or less, preferably 300 nm or less, and more preferably 250 nm or less. If the average particle size of the emulsion droplets exceeds 400 nm, the effect of preventing emulsion separation is poor, and a sense of penetration cannot be obtained. As for the lower limit of the average particle size of the emulsion droplets, the smaller the size, the better the effect of preventing emulsion separation or the sense of penetration, so there is no particular limitation, and it is usually above 20 nm.

[0113] The average particle size of the emulsion droplets in the water-in-oil emulsion cosmetic of the present invention is set as the value obtained by measuring using a Beckman Coulter N5 Particle Analyzer by dynamic light scattering. During measurement, a sample obtained by diluting the prepared water-in-oil emulsion cosmetic composition with water can be used. Details of the measurement conditions are as described in the examples.

[0114] The viscosity of the water-in-oil emulsion cosmetic of the present invention is set as the value obtained by storing the prepared water-in-oil emulsion cosmetic at 30°C for one day and measuring it using a Brookfield rotational viscometer. There are no particular limitations on the viscosity of the water-in-oil emulsion cosmetic of the present invention, but from the viewpoint of excellent penetration and other properties, a viscosity of 1 mPa·s to 4000 mPa·s at 30°C is preferred, and more preferably 1 mPa·s to 3000 mPa·s or less.

[0115] The water-in-oil emulsion cosmetic of the present invention, in addition to being liquid, can also be formulated into emulsions, creams, etc., depending on the intended use. Specifically, it is applicable to various beauty cosmetics, such as: serums, lotions, emulsions, creams, sheet masks, sunscreens, and other basic cosmetics; body cosmetics; foundations, bases, concealers, lip cosmetics, etc. Furthermore, besides being used on the skin of the face, body, hands, and feet, it can also be used on hair, and is suitable for hair sprays, hair lotions, and hair gels. Moreover, skin care cosmetics such as lotions, emulsions, and masks are particularly effective in achieving the effects of the present invention; therefore, from the viewpoint of achieving a sense of penetration, a liquid form is preferred in the present invention.

[0116] The liquid oil-in-water emulsion cosmetic can be filled into a non-aerosol spray container or an aerosol spray container for spraying into a mist, or it can be impregnated in non-woven fabric to form a sheet cosmetic. While the oil-in-water emulsion cosmetic of this invention can be applied directly by hand, it is more preferable to use it as a sheet cosmetic by impregnating it in non-woven fabric to achieve a stronger feeling of firmness or penetration.

[0117] Alternatively, the present invention can also employ the following technical solutions.

[0118] <1>

[0119] A water-in-oil emulsion cosmetic, comprising: (A) An oil with an IOB value of 0.2 to 0.8 and which is solid at 25°C; (B) An oil that has an HSP distance Ra of less than 7.0 from component (A) and is liquid at 25°C; (C) Select one or more from the group consisting of free phospholipids and lysophospholipids; and (D) Select one or more from the group consisting of ethanol and polyols with an IOB value of 1.5 to 5. The average particle size of the emulsion droplets is less than 400 nm.

[0120] <2>

[0121] As mentioned above <1> The water-in-oil emulsion cosmetic, wherein component (C) contains lysophospholipids.

[0122] <3>

[0123] As mentioned above <1> or <2> In the aforementioned water-in-oil emulsion cosmetic, the content of component (C) is in a mass ratio of 0.03 to 1.0 relative to the total content of component (A) and component (B).

[0124] <4>

[0125] As mentioned above <1> ~ <3> The water-in-oil emulsion cosmetic described in any one of the following methods, wherein the content of ingredient (D) is 5% to 40% by mass relative to the total amount of the water-in-oil emulsion cosmetic.

[0126] <5>

[0127] As mentioned above <1> ~ <4> The water-in-oil emulsion cosmetic described in any one of the above statements also contains the ingredient (E) erythritol.

[0128] <6>

[0129] As mentioned above <1> ~ <5> The water-in-oil emulsion cosmetic described in any one of the above examples has a viscosity of 1 mPa·s to 4000 mPa·s at 30°C.

[0130] <7>

[0131] As mentioned above <1> ~ <6> The water-in-oil emulsion cosmetic described in any one of the above statements is formed by coating or impregnating a sheet.

[0132] Example

[0133] The present invention will be described in detail below with examples. However, the present invention is not limited to these examples in any way.

[0134] Examples 1-34 and Comparative Examples 1-2: Water-in-oil emulsion cosmetics

[0135] A water-in-oil emulsion cosmetic was prepared using the formulation shown in Table 2 below (the total of all ingredients is set to 100% by mass). The cosmetic was evaluated according to the following evaluation methods for non-gelation or non-segregation, non-emulsification, firmness, non-stickiness, and permeability. The average particle size of the emulsion droplets was measured using the following methods. The results are shown in Tables 2-4.

[0136] [Table 2] Component (B) varies depending on the component (A). In the table, those marked with "(B)" are equivalent to component (B) of the present invention in each embodiment and comparative example.

[0137] Those marked with "(B) Comparison" are not equivalent to component (B) of the present invention in the various embodiments and comparative examples.

[0138] The mass ratio of the content of a specific component (A) to the content of a specific component (B).

[0139] In the case of a specific ingredient (A) being No.4, it is the mass ratio of the content of No.4 to the total content of ingredients (B) that are equivalent to No.4.

[0140] In the case of a specific ingredient (A) being No.5, it is the mass ratio of the content of No.5 to the total content of ingredients (B) that are equivalent to No.4.

[0141] In the case of a specific ingredient (A) being No. 19, it is the mass ratio of the content of No. 19 to the total content of ingredients equivalent to ingredient (B) for No. 4.

[0142] In the case of a specific ingredient (A) being No. 20, it is the mass ratio of the content of No. 20 to the total content of ingredients equivalent to ingredient (B) for No. 4.

[0143] In the case of a specific ingredient (A) being No. 21, it is the mass ratio of the content of No. 21 to the total content of ingredients equivalent to ingredient (B) for No. 4.

[0144] The total content of all components (C) relative to the total content of all components (A) and all components (B) by mass.

[0145] The proportion of ingredient (D) (including comparative substances) relative to the total amount of cosmetics.

[0146] [Table 3] Component (B) varies depending on the component (A). In the table, those marked with "(B)" are equivalent to component (B) of the present invention in each embodiment and comparative example.

[0147] Those marked with "(B) Comparison" are not equivalent to component (B) of the present invention in the various embodiments and comparative examples.

[0148] The mass ratio of the content of a specific component (A) to the content of a specific component (B).

[0149] In the case of a specific ingredient (A) being No.4, it is the mass ratio of the content of No.4 to the total content of ingredients (B) that are equivalent to No.4.

[0150] In the case of a specific ingredient (A) being No.5, it is the mass ratio of the content of No.5 to the total content of ingredients (B) that are equivalent to No.4.

[0151] In the case of a specific ingredient (A) being No. 19, it is the mass ratio of the content of No. 19 to the total content of ingredients equivalent to ingredient (B) for No. 4.

[0152] In the case of a specific ingredient (A) being No. 20, it is the mass ratio of the content of No. 20 to the total content of ingredients equivalent to ingredient (B) for No. 4.

[0153] In the case of a specific ingredient (A) being No. 21, it is the mass ratio of the content of No. 21 to the total content of ingredients equivalent to ingredient (B) for No. 4.

[0154] The total content of all components (C) relative to the total content of all components (A) and all components (B) by mass.

[0155] The proportion of ingredient (D) (including comparative substances) relative to the total amount of cosmetics.

[0156] [Table 4] Component (B) varies depending on the component (A). In the table, those marked with "(B)" are equivalent to component (B) of the present invention in each embodiment and comparative example.

[0157] Those marked with "(B) Comparison" are not equivalent to component (B) of the present invention in the various embodiments and comparative examples.

[0158] The mass ratio of the content of a specific component (A) to the content of a specific component (B).

[0159] In the case of a specific ingredient (A) being No.4, it is the mass ratio of the content of No.4 to the total content of ingredients (B) that are equivalent to No.4.

[0160] In the case of a specific ingredient (A) being No. 5, it is the mass ratio of the content of No. 5 to the total content of ingredients equivalent to ingredient (B) for No. 4.

[0161] In the case of a specific ingredient (A) being No. 19, it is the mass ratio of the content of No. 19 to the total content of ingredients equivalent to ingredient (B) for No. 4.

[0162] In the case of a specific ingredient (A) being No. 20, it is the mass ratio of the content of No. 20 to the total content of ingredients equivalent to ingredient (B) for No. 4.

[0163] In the case of a specific ingredient (A) being No. 21, it is the mass ratio of the content of No. 21 to the total content of ingredients equivalent to ingredient (B) for No. 4.

[0164] The total content of all components (C) relative to the total content of all components (A) and all components (B) by mass.

[0165] The proportion of ingredient (D) (including comparative substances) relative to the total amount of cosmetics.

[0166] (Note 1) Lecinol S-10EZ (manufactured by Nikko Chemical Co., Ltd.)

[0167] (Note 2) LP70H (manufactured by Nippon Seika Co., Ltd.)

[0168] (Note 3) J-Lecithin CLO (manufactured by J-Oil Mills Co., Ltd.)

[0169] (Note 4) Phytosterol QI (manufactured by Tama Biochemical Co., Ltd.)

[0170] (Note 5) Nissui Marine Cholesterol (manufactured by Nippon Suisan Co., Ltd.)

[0171] (Note 6) CERAMIDE2 (manufactured by Croda Japan Co., Ltd.)

[0172] (Note 7) TINOSORB S (manufactured by BASF)

[0173] (Note 8) Erythritol (manufactured by Nikken Chemical Co., Ltd.)

[0174] (Manufacturing method)

[0175] The water-in-oil emulsion cosmetics of Examples 1-34 and Comparative Examples 1-2 were prepared by the following procedures.

[0176] A. Heat components (1) to (9) to 70°C and mix them evenly.

[0177] B. Dissolve components (10) to (21) by heating them to 70°C.

[0178] C. Heat component (22) to 70°C.

[0179] D. Gradually add B to A and mix and disperse using a Desper mixer.

[0180] E. Gradually add C to D and mix and disperse using a dispersion homogenizer.

[0181] F. Cool E to room temperature and then perform high-pressure processing using a microfluidizer.

[0182] G. Mix F with ingredients (23) to (28) to obtain an oil-in-water emulsion cosmetic.

[0183] (Evaluation Method 1: No gelation or precipitation)

[0184] After the water-in-oil emulsion cosmetics of Examples 1-34 and Comparative Examples 1-2 were placed at 5°C for one month, the samples that were restored to 25°C were visually confirmed to show whether they had gelled or precipitated.

[0185] <Evaluation Criteria>

[0186] (Judgment): (Evaluation)

[0187] A: No gelation or precipitation was observed at all.

[0188] B: Almost no gelation or precipitation was observed.

[0189] C: Gel formation or precipitation is visible in samples stored at 5°C.

[0190] (Evaluation Method 2: Non-emulsification)

[0191] After the water-in-oil emulsion cosmetics of Examples 1-34 and Comparative Examples 1-2 were placed at 50°C for one month, the samples that were restored to 25°C were visually confirmed to show whether there was emulsification (whether there was emulsion separation).

[0192] <Judgment Criteria>

[0193] (Judgment): (Evaluation)

[0194] A: No milk separation observed at all.

[0195] B: Almost no milk separation was observed.

[0196] C: Visible milk separation

[0197] (Evaluation Method 3: "Tightness", "Non-stickiness", "Penetration")

[0198] Twenty cosmetic professionals evaluated the water-in-oil emulsion cosmetics used in Examples 1-34 and Comparative Examples 1-3, each using a five-level evaluation of "firmness," "non-stickiness," and "penetration" according to the following evaluation criteria. The average score from all evaluators was determined based on the following criteria.

[0199] <Evaluation Criteria>

[0200] (Score): (Result)

[0201] 5 points: Very good

[0202] 4 points: Good

[0203] 3 points: It can't be described as good, nor can it be described as slightly bad.

[0204] 2 points: Slightly unsatisfactory

[0205] 1 point: Poor

[0206] <Evaluation Criteria>

[0207] (Judgment): (Average score)

[0208] A: Above 4.0 to 5.0 points

[0209] B: Above 3.0 points but below 4.0 points

[0210] C: 1.0 to below 3.0

[0211] (Measurement method: average particle size of emulsion droplets)

[0212] For the water-in-oil emulsion cosmetics of Examples 1-34 and Comparative Examples 1-2, samples were prepared by diluting them approximately 500 times with purified water. The average particle size of each sample was measured using a Beckman Coulter N5 Particle Analyzer via dynamic light scattering. The measurement was performed three times at room temperature, and the average value of the three measurements was used.

[0213] According to the results in Tables 2-4, it is clear that the oil-in-water emulsified cosmetics of Examples 1-34 of the present invention are superior to the oil-in-water emulsified cosmetics of Comparative Examples 1-2 in terms of no gelation and precipitation, no emulsification, firming sensation, no stickiness, and penetrability.

[0214] In addition, Comparative Example 1 (Ra=12.92) and Comparative Example 2 (Ra=7.17), which are liquid oils at 25°C and have an HSP distance Ra greater than 7.0 between them and component (A), have emulsion droplets larger than 400 nm. They are poor in terms of no gelation or precipitation, no emulsification, and permeability, and cannot produce satisfactory products.

[0215] Example 35: Toner (mass %)

[0216] 1. Hydrogenated phospholipids (Note 1)(Note 9) 0.3

[0217] 2. Hydrogenated lysophospholipids (Note 2) 0.3

[0218] 3. Cholesterol (Note 9) 0.05

[0219] 4,1,3-Butanediol 6

[0220] 5. Glycerin 3

[0221] 6. Polyglycerol-3 (IOB=3.0) (Note 10) 1

[0222] 7. Pentaerythritol tetra(ethylhexanoate) ester 2

[0223] 8. Mineral oil 2

[0224] 9. Phenoxyethanol 0.3

[0225] 10. Polysorbate 80 (Note 11) 0.1

[0226] 11. Sorbitan sesquioleate (Note 12) 0.1

[0227] 12. Stearyl glycyrrhetinic acid ester 1

[0228] 13. Spices 0.05

[0229] 14. Purified water 20

[0230] 15. Remaining purified water

[0231] 16. Sodium monohydrogen phosphate 0.02

[0232] 17. Sodium dihydrogen phosphate 0.02

[0233] 18. Disodium ethylenediaminetetraacetate 0.01

[0234] 19. Ethanol 8

[0235] 20. Erythritol (Note 8) 3

[0236] 21. Glyceryl polyether-26 (IOB=1.9) (Note 13) 5

[0237] 22. Sodium hyaluronate 0.1

[0238] 23. Hydrolyzed collagen 0.1

[0239] (Note 9) COMPOSITE-PC (manufactured by Nippon Seika Co., Ltd.)

[0240] (Note 10) PGL-S (manufactured by Sakamoto Pharmaceutical Co., Ltd.)

[0241] (Note 11) Rheodol TW-O120V (manufactured by Kao Corporation)

[0242] (Note 12) Rheodol AO-15V (manufactured by Kao Corporation)

[0243] (Note 13) LOPONIC EG-1 (manufactured by Shima Trading Co., Ltd.)

[0244] (Manufacturing method)

[0245] A. Heat components (1) to (6) to 70°C and mix them evenly.

[0246] B. Dissolve components (7) to (13) by heating them to 70°C.

[0247] C. Heat component (14) to 70°C.

[0248] D. Gradually add B to A and mix and disperse using a Desper mixer.

[0249] E. Gradually add C to D and mix and disperse using a dispersion homogenizer.

[0250] F. Cool E to room temperature and then perform high-pressure treatment at 100 MPa using a nanovarter.

[0251] G. Mix F with ingredients (15) to (23) to obtain a lotion.

[0252] The toner obtained by the above method performs excellently in terms of no gelation or separation, no emulsification, firming effect, non-stickiness, and penetration.

[0253] Furthermore, regarding component (A) cholesterol, the liquid oil equivalent to component (B) is pentaerythritol tetra(ethylhexanoate) ester (Ra=2.36) and mineral oil (Ra=3.37). The mass ratio of component (A) to component (B) is 0.0125.

[0254] Regarding component (A) stearyl glycyrrhetinic acid ester, the liquid oil equivalent to component (B) is pentaerythritol tetra(ethylhexanoate) ester (Ra=2.81) and mineral oil (Ra=3.80). The mass ratio of component (A) to component (B) is 0.25.

[0255] The mass ratio of all ingredient (C) to the total mass of all ingredients (A) and all ingredients (B) (C) / {(A)+(B)} is 0.12. Ingredient (D) accounts for 18% of the total amount of the toner, with an average particle size of approximately 200 nm.

[0256] Example 36: Beauty Essence (mass %)

[0257] 1. Hydrogenated phospholipids (Note 14) 0.3

[0258] 2. Hydrogenated lysophospholipids (Note 2) 0.3

[0259] 3. Phytosterols (Note 4) (Note 14) 0.05

[0260] 4. Cholesterol (Note 5) 0.05

[0261] 5,1,3-Butanediol 6

[0262] 6. Glycerin 3

[0263] 7. Olive fruit oil 3

[0264] 8. Squalane 1

[0265] 9. Mineral oil 1

[0266] 10. Phenoxyethanol 0.3

[0267] 11. Stearyl glycyrrhizate 0.8

[0268] 12. Spices 0.05

[0269] 13. Purified water 20

[0270] 14. Hydroxypropyl methylcellulose (Note 15) 0.1

[0271] 15. (PEG-240 / decyltetradecyl alcohol polyether-20 / HDI) copolymer (Note 16) 0.05

[0272] 16. Tremella polysaccharide (Note 17) 0.01

[0273] 17. Remaining purified water

[0274] 18. Sodium monohydrogen phosphate 0.02

[0275] 19. Sodium dihydrogen phosphate 0.02

[0276] 20. Disodium ethylenediaminetetraacetate 0.01

[0277] 21. Ethanol 8

[0278] 22. Erythritol (Note 8) 2

[0279] 23. PPG-9 diglyceride (Note 18) 2

[0280] 24. Cyclohexane-1,4-dicarboxylic acid diethoxydiethylene glycol ester (Note 19) 0.1

[0281] 25. Hydrolyzed elastin 0.2

[0282] (Note 14) PHYTOCOMPO-PP (manufactured by Nippon Seika Co., Ltd.)

[0283] (Note 15) METOLOSE 65SH-15000 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0284] (Note 16) ADEKA NOL GT-700 (manufactured by ADEKA Co., Ltd.)

[0285] (Note 17) TREMOIST-TP (manufactured by Nippon Seika Co., Ltd.)

[0286] (Note 18) SY-DP9 (manufactured by Sakamoto Pharmaceutical Co., Ltd.)

[0287] (Note 19) NEOSOLUE-AQURIO (manufactured by Nippon Seika Co., Ltd.)

[0288] (Manufacturing method)

[0289] A. Heat components (1) to (6) to 70°C and mix them evenly.

[0290] B. Dissolve components (7) to (12) by heating them to 70°C.

[0291] C. Heat component (13) to 70°C.

[0292] D. Gradually add B to A and mix and disperse using a Desper mixer.

[0293] E. Gradually add C to D and mix and disperse using a dispersion homogenizer.

[0294] F. Cool E to room temperature and then perform high-pressure treatment at 50 MPa using an Ultimizer.

[0295] G. Mix F with ingredients (14) to (25) to obtain a beauty solution.

[0296] The beauty serum obtained by the above method exhibits excellent performance in terms of no gelation or separation, no emulsification, firming effect, non-stickiness, and penetrability.

[0297] Furthermore, regarding component (A) phytosterols, the equivalent liquid oils for component (B) are olive fruit oil (Ra=1.61), squalane (Ra=4.53), and mineral oil (Ra=2.88), with a mass ratio (A) / (B) of 0.01 for component (A) to component (B). Regarding component (A) cholesterol, the equivalent liquid oils for component (B) are olive fruit oil (Ra=1.97), squalane (Ra=5.00), and mineral oil (Ra=3.37), with a mass ratio (A) / (B) of 0.01 for component (A) to component (B). Regarding component (A) stearyl glycyrrhetinic acid ester, the liquid oil equivalent to component (B) is olive fruit oil (Ra=3.57), squalane (Ra=5.28) and mineral oil (Ra=3.80), and the mass ratio of component (A) to component (B) is 0.16.

[0298] The mass ratio of all ingredient (C) to the total mass of all ingredients (A) and all ingredients (B) (C) / {(A)+(B)} is 0.10. Ingredient (D) accounts for 17% of the total amount of the beauty serum, with an average particle size of approximately 300 nm.

[0299] Example 37: Daytime beauty serum (mass %)

[0300] 1. Phospholipids (Note 3) 0.5

[0301] 2. Hydrogenated lysophospholipids (Note 2) 0.2

[0302] 3. Phytosterols (Note 4) 0.05

[0303] 4,1,3-Butanediol 5

[0304] 5. Glycerin 5

[0305] 6. Jojoba seed oil 5

[0306] 7. Hydrogenated polydecene 2

[0307] 8. Ethyl oleate 0.5

[0308] 9. Ethylhexyl methoxycinnamate 3

[0309] 10. Phenoxyethanol 0.3

[0310] 11. Stearyl glycyrrhetinic acid ester 1

[0311] 12. Diethylaminohydroxybenzoylhexyl benzoate (Note 20) 1

[0312] 13. Spices 0.2

[0313] 14. Purified water 40

[0314] 15. Carboxyvinyl polymer (Note 21) 0.1

[0315] 16. Acrylic acid-alkyl methacrylate copolymer (Note 22) 0.05

[0316] 17. Sodium alginate (Note 23) 0.01

[0317] 18. Remaining purified water

[0318] 19. Sodium monohydrogen phosphate 0.01

[0319] 20. Sodium dihydrogen phosphate 0.01

[0320] 21. Disodium ethylenediaminetetraacetate 0.01

[0321] 22. Sodium hydroxide 0.04

[0322] (Note 20) Uvinul A PLUS GRANULAR (manufactured by BASF)

[0323] (Note 21) CARBOPOL 980 (manufactured by LUBRIZOL ADVANCED MATERIALS)

[0324] (Note 22) CARBOPOL 980 (manufactured by LUBRIZOL ADVANCED MATERIALS)

[0325] (Note 23) Snow Algin M (manufactured by Fuji Chemical Industry Co., Ltd.)

[0326] (Manufacturing method)

[0327] A. Heat components (1) to (5) to 70°C and mix them evenly.

[0328] B. Dissolve components (6) to (13) by heating them to 70°C.

[0329] C. Heat component (14) to 70°C.

[0330] D. Gradually add B to A and mix and disperse using a Desper mixer.

[0331] E. Gradually add C to D and mix and disperse using a dispersion homogenizer.

[0332] F. Cool E to room temperature and then perform high-pressure treatment at 100 MPa using a microfluidizer.

[0333] G. Mix F with ingredients (15) to (22) to obtain a daytime beauty serum.

[0334] The daytime beauty serum obtained by the above method exhibits excellent performance in terms of no gelling or separation, no emulsification, firming sensation, non-stickiness, and penetrability.

[0335] Furthermore, regarding component (A) phytosterols, the liquid oil equivalent to component (B) is jojoba seed oil (Ra=2.6), hydrogenated polydecene (Ra=4.29), ethyl oleate (Ra=2.16), and ethylhexyl methoxycinnamate (Ra=2.33). The mass ratio of component (A) to component (B) is 0.0048.

[0336] Regarding component (A) stearyl glycyrrhetinic acid ester, the liquid oil equivalent to component (B) is jojoba seed oil (Ra=4.05), hydrogenated polydecene (Ra=4.90), ethyl oleate (Ra=4.15), and ethylhexyl methoxycinnamate (Ra=3.59). The mass ratio of component (A) to component (B) is 0.095.

[0337] Regarding component (A) diethylaminohydroxybenzoyl benzoate, the equivalent liquid oil is ethylhexyl methoxycinnamate (Ra=5.06), and the mass ratio of component (A) to component (B) is 0.33.

[0338] The mass ratio (A) / (B) of the content of component (A) relative to the content of all components (B) is 0.20.

[0339] The mass ratio (C) / {(A)+(B)} of the total content of ingredient (C) relative to the total content of ingredients (A) and (B) is 0.056. The content of ingredient (D) relative to the total amount of daytime beauty serum is 10%, and the average particle size is approximately 250 nm.

[0340] Example 38: Sheet cosmetics (mass %)

[0341] 1. Hydrogenated phospholipids (Note 1) 0.4

[0342] 2. Hydrogenated lysophospholipids (Note 2) 0.1

[0343] 3. Phytosterols (Note 4) 0.05

[0344] 4,1,3-Butanediol 5

[0345] 5. Glycerin 5

[0346] 6. Olive fruit oil 2

[0347] 7. Squalane 1

[0348] 8. Polydimethylsiloxane 0.5

[0349] 9. Ethyl oleate 1

[0350] 10. Tetrahexyldecanoate ascorbate 0.2

[0351] 11. Phenoxyethanol 0.3

[0352] 12. Stearyl glycyrrhetinic acid ester 1

[0353] 13. Ceramide NP (Note 24) 0.05

[0354] 14. Spices 0.05

[0355] 15. Purified water 20

[0356] 16. Purified water balance

[0357] 17. Sodium monohydrogen phosphate 0.02

[0358] 18. Sodium dihydrogen phosphate 0.02

[0359] 19. Disodium ethylenediaminetetraacetate 0.01

[0360] 20. Ethanol 5

[0361] 21. Rice fermentation liquid 0.5

[0362] (Note 24) CERAMIDE3 (manufactured by Cosmo Farm)

[0363] (Manufacturing method)

[0364] A. Heat components (1) to (5) to 70°C and mix them evenly.

[0365] B. Dissolve components (6) to (14) by heating them to 70°C.

[0366] C. Heat component (15) to 70°C.

[0367] D. Gradually add B to A and mix and disperse using a Desper mixer.

[0368] E. Gradually add C to D and mix and disperse using a dispersion homogenizer.

[0369] F. Cool E to room temperature and then perform high-pressure treatment at 200 MPa using an Ultimizer.

[0370] G. Mix F with ingredients (16) to (21) and impregnate it with the sheet to obtain a sheet cosmetic.

[0371] The toner obtained by the above method performs excellently in terms of no gelation or separation, no emulsification, firming effect, non-stickiness, and penetration.

[0372] Furthermore, regarding component (A) phytosterols, the liquid oil equivalent to component (B) is olive fruit oil (Ra=1.61), squalane (Ra=4.53) and ethyl oleate (Ra=2.16), and the mass ratio of component (A) to component (B) is 0.0125.

[0373] Regarding component (A) stearyl glycyrrhetinic acid ester, the liquid oil equivalent to component (B) is olive fruit oil (Ra=3.57), squalane (Ra=5.28) and ethyl oleate (Ra=4.15), and the mass ratio of component (A) to component (B) is 0.25.

[0374] Regarding component (A) ceramide NP, the equivalent liquid oil for component (B) is ethyl oleate (Ra=6.4), and the mass ratio of component (A) to component (B) is 0.05.

[0375] The mass ratio of the content of all components (C) to the total content of all components (A) and all components (B) (C) / {(A)+(B)} is 0.089.

[0376] The content of ingredient (D) relative to the total amount of all sheet cosmetics (excluding sheet substrate) is 15%, and the average particle size is about 100nm.

[0377] Example 39: Sheet-shaped beauty serum (mass %)

[0378] 1. Hydrogenated phospholipids (Note 1) 0.3

[0379] 2. Hydrogenated lysophospholipids (Note 2) 0.2

[0380] 3. Cholesterol (Note 5) 0.1

[0381] 4. Dipropylene glycol 5

[0382] 5. Glycerin 5

[0383] 6. Tris(1,2-diethyl)-3-ethylhexyl triglyceride

[0384] 7. Squalane 2

[0385] 8. Isostearic acid 1

[0386] 9. Phenoxyethanol 0.3

[0387] 10. Stearyl glycyrrhetinic acid ester 1

[0388] 11. Ceramide NG (Note 6) 0.05

[0389] 12. Spices 0.05

[0390] 13. Purified water 20

[0391] 14. Cellulose gum (Note 25) 0.05

[0392] 15. Tamarind gum (Note 26) 0.01

[0393] 16. Carrageenan (Note 27) 0.05

[0394] 17. Remaining purified water

[0395] 18. Sodium monohydrogen phosphate 0.02

[0396] 19. Sodium dihydrogen phosphate 0.02

[0397] 20. Disodium ethylenediaminetetraacetate 0.01

[0398] 21. Ethanol 3

[0399] 22. Hydrolyzed hyaluronic acid 0.1

[0400] (Note 25) CMC Daicel 1170 (manufactured by Daicel)

[0401] (Note 26) Glyloid 6C (manufactured by Sumitomo Pharmaceutical Co., Ltd., Japan)

[0402] (Note 27) GENUVISCO TYPE PJ-JPE (manufactured by CP KELCO)

[0403] (Manufacturing method)

[0404] A. Heat components (1) to (5) to 70°C and mix them evenly.

[0405] B. Dissolve components (6) to (12) by heating them to 70°C.

[0406] C. Heat component (13) to 70°C.

[0407] D. Gradually add B to A and mix and disperse using a Desper mixer.

[0408] E. Gradually add C to D and mix and disperse using a dispersion homogenizer.

[0409] F. Cool E to room temperature and then perform high-pressure treatment at 50 MPa using a nanovarter.

[0410] G. Mix F with ingredients (14) to (22) and impregnate it with the sheet to obtain a sheet-like cosmetic liquid.

[0411] Furthermore, regarding component (A) cholesterol, the liquid oil equivalent to component (B) is triisooctanoic acid glyceride (Ra=1.69), squalane (Ra=5.00), and isostearic acid (Ra=2.43). The mass ratio of component (A) to component (B) is 0.0167.

[0412] Regarding ingredient (A) stearyl glycyrrhetinic acid ester, the liquid oil equivalent to ingredient (B) is triisooctanoic acid glyceride (Ra=3.69), squalane (Ra=5.28), and isostearic acid (Ra=5.20). The mass ratio of the content of ingredient (A) to the content of ingredient (B) is 0.17.

[0413] Regarding ingredient (A) ceramide NG, the equivalent liquid oil for ingredient (B) is isostearic acid (Ra=4.98), and the mass ratio of the content of ingredient (A) to the content of ingredient (B) is 0.05.

[0414] The mass ratio of the content of all components (C) to the total content of all components (A) and all components (B) (C) / {(A)+(B)} is 0.070.

[0415] The content of component (D) relative to the total amount of sheet-like beauty liquid (excluding sheet substrate) is 13%, and the average particle size is about 300nm.

[0416] Example 40: Sunscreen cosmetics (mass %)

[0417] 1. Hydrogenated phospholipids (Note 1) 0.8

[0418] 2. Phytosterols (Note 4) 0.2

[0419] 3,1,3-Butanediol 5

[0420] 4. Glycerin 5

[0421] 5. Behenryltrimethylammonium chloride 0.1

[0422] 6. Tris(1,2-diethyl) caprylate 5

[0423] 7. Ethylhexyl methoxycinnamate

[0424] 8. Ethyl oleate 0.5

[0425] 9. Phenoxyethanol 0.3

[0426] 10. Stearyl glycyrrhizate 0.7

[0427] 11. tert-Butylmethoxydibenzoylmethane (Note 28) 2

[0428] 12. Spices 0.05

[0429] 13. Purified water 40

[0430] 14. (Acrylic ester / alkyl acrylate (C10-30)) crosspolymer (Note 29) 0.05

[0431] 15. Hydroxyethyl cellulose (Note 30) 0.2

[0432] 16. Xanthan gum (Note 31) 0.1

[0433] 17. Remaining purified water

[0434] 18. Triethanolamine 0.05

[0435] 19. Sodium monohydrogen phosphate 0.02

[0436] 20. Sodium dihydrogen phosphate 0.02

[0437] 21. Disodium ethylenediaminetetraacetate 0.01

[0438] 22. Ethanol 5

[0439] 23. Zinc oxide 2

[0440] (Note 28) PARSOL 1789 (manufactured by LCUnited)

[0441] (Note 29) PEMULEN TR-1 (manufactured by LUBRIZOL ADVANCED MATERIALS)

[0442] (Note 30) NATROSOL 250 HHR (manufactured by Ashland Company)

[0443] (Note 31) GRINSTED XANTHAN CLEAR 80 (manufactured by DANISCC)

[0444] (Manufacturing method)

[0445] A. Heat components (1) to (4) to 70°C and mix them evenly.

[0446] B. Dissolve components (5) to (12) by heating them to 70°C.

[0447] C. Heat component (13) to 70°C.

[0448] D. Gradually add B to A and mix and disperse using a Desper mixer.

[0449] E. Gradually add C to D and mix and disperse using a dispersion homogenizer.

[0450] F. Cool E to room temperature and then perform high-pressure treatment at 50 MPa using a nanovarter.

[0451] G. Mix F with ingredients (14) to (23) to obtain a sunscreen cosmetic.

[0452] Furthermore, regarding component (A) phytosterols, the liquid oil equivalent to component (B) is triisooctanoic acid glyceryl ester (Ra=1.54), ethylhexyl methoxycinnamate (Ra=2.33), and ethyl oleate (Ra=2.16). The mass ratio of component (A) to component (B) is 0.016.

[0453] Regarding ingredient (A) stearyl glycyrrhetinic acid ester, the liquid oil equivalent to ingredient (B) is triisooctanoic acid glyceryl ester (Ra=3.69), ethylhexyl methoxycinnamate (Ra=3.59), and ethyl oleate (Ra=4.15). The mass ratio of the content of ingredient (A) to the content of ingredient (B) is 0.056.

[0454] Regarding component (A) tert-butylmethoxydibenzoylmethane, the equivalent liquid oil is ethylhexyl methoxycinnamate (Ra=4.88), and the mass ratio of component (A) to component (B) is 0.29.

[0455] The mass ratio of the content of all components (C) to the total content of all components (A) and all components (B) is 0.052 (C) / {(A)+(B)}.

[0456] Ingredient (D) accounts for 15% of the total content of sunscreen cosmetics, with an average particle size of approximately 200 nm.

Claims

1. A water-in-oil emulsion cosmetic, comprising: (A) An oil with an IOB value of 0.2 to 0.8 and which is solid at 25°C; (B) An oil that has an HSP distance Ra of less than 7.0 from component (A) and is liquid at 25°C; (C) Select one or more from the group consisting of free phospholipids and lysophospholipids; and (D) Select one or more from the group consisting of ethanol and polyols with an IOB value of 1.5 to 5. The average particle size of the emulsion droplets is less than 400 nm.

2. The water-in-oil emulsion cosmetic as described in claim 1, wherein, The ingredient (C) contains lysophospholipids.

3. The water-in-oil emulsion cosmetic as described in claim 1 or 2, wherein, The mass ratio of the content of component (C) to the total content of component (A) and component (B) (C) / {(A)+(B)} is 0.03 to 1.

0.

4. The water-in-oil emulsion cosmetic as described in claim 1 or 2, wherein, The content of ingredient (D) is 5% to 40% by mass relative to the total amount of the water-in-oil emulsion cosmetic.

5. The water-in-oil emulsion cosmetic as described in claim 1 or 2, further comprising ingredient (E) erythritol.

6. The water-in-oil emulsion cosmetic as described in claim 1 or 2, wherein the viscosity at 30°C is 1 mPa·s to 4000 mPa·s.

7. The water-in-oil emulsion cosmetic as described in claim 1 or 2, wherein it is formed by coating or impregnating a sheet.

Images