Oil-based cosmetic

Abstract

To provide an oily cosmetic which is excellent in color migration resistance, color durability, gloss when applied to the skin or the lips and durability of gloss.SOLUTION: There is provided an oily cosmetic which comprises (A) an oil agent which contains a phytosterol derivative, has a refractive index at 40°C of 1.50 or more and is liquid at 25°C and (B) a liquid silicone oil incompatible with the oil agent (A) at 25°C as an oily base agent. The cosmetic preferably contains (C) a separation suppressing agent having an action for suppressing separation between the oil agent (A) and the silicone oil (B).SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an oil-based cosmetic excellent in color fastness, color retention, gloss, and gloss persistence.

Background Art

[0002] Conventionally, for oil-based cosmetics such as lipsticks, when the cosmetic is applied to the skin or lips and then touches a contacted object such as clothes or a cup, the color transfer property (also referred to as "secondary adhesion") in which the cosmetic is transferred to the contacted part has been a problem. Therefore, the development of lip cosmetics that are less likely to transfer color (less secondary adhesion), that is, excellent in color fastness, has been promoted. For example, in Patent Document 1, a lip cosmetic containing (a) hydrogenated polyisobutene and (b) methylphenyl silicone that separates when mixed with the component (a) is proposed. And this document describes that in this cosmetic, the component (b) becomes the continuous phase, the component (a) containing the colorant becomes the dispersed phase, and when applied, the component (b) forming the continuous phase separates to the surface layer, thereby imparting gloss and an anti-secondary adhesion (less color transfer) effect (

[0011] ). However, in this lipstick cosmetic, when applied, methylphenyl silicone containing no colorant separates to the surface layer to form a smooth transparent layer. Therefore, although it has good gloss (shine) immediately after application, after touching a contacted object such as clothes or a cup and the surface layer disappears, the hydrogenated polyisobutene layer with a low refractive index is exposed, resulting in a decrease in gloss and a problem of lacking "persistence of gloss" during makeup.

[0003] On the one hand, Patent Document 2 discloses an oily composition containing as a main component steladiene having a structure in which the hydroxyl group at the 3-position of phytosterol is dehydrated to be converted into a 3,5-conjugated diene, and having a phytosterol content of 20% by mass or less, and an oily base for external skin preparations using the same. It is described that when the content of steladiene is high and the content of phytosterol is low, a liquid oily composition having a large refractive index is obtained, and this oily composition exhibits excellent gloss imparting properties when used in external skin preparations (

[0008] ) and is used in lipsticks and lip glosses ([Claim 10]). Further, this document describes that this oil and other oils, for example, silicone oils may be used in combination (

[0034] ). However, there is no disclosure of a specific example of using this oil and silicone oils in combination, and there is no disclosure at all regarding using this oil in combination with other oils that are incompatible with it.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention has been completed under such a background art, and its object is to provide an oily cosmetic excellent in color transfer resistance, color retention, gloss, and gloss persistence.

Means for Solving the Problems

[0006] As a result of intensive research to solve the above problems, the present inventors have found that in an oil-based cosmetic, by using in combination an oil agent containing a phytosterol derivative as an oil base, having a refractive index of 1.50 or more at 40°C and being liquid at 25°C, and a liquid silicone oil that is incompatible with the oil agent, an oil-based cosmetic excellent in color transfer resistance, color retention, gloss, and gloss persistence can be obtained, and thus the present invention has been completed.

[0007] Thus, according to the present invention, there is provided an oil-based cosmetic containing, as an oil base, (A) an oil agent containing a phytosterol derivative, having a refractive index of 1.50 or more at 40°C and being liquid at 25°C, and (B) a liquid silicone oil that is incompatible with the oil agent (A) at 25°C.

Effects of the Invention

[0008] The oil-based cosmetic of the present invention is excellent in color transfer resistance, color retention, gloss when applied to the skin or lips, and gloss persistence.

Modes for Carrying Out the Invention

[0009] The oil-based cosmetic of the present invention contains, as essential components, (A) an oil agent containing a phytosterol derivative, having a refractive index of 1.50 or more at 40°C and being liquid at 25°C, and (B) a liquid silicone oil that is incompatible with the oil agent (A) at 25°C.

[0010] The oily cosmetic of the present invention may be liquid or solid, and may be a single-layer type in which the oil agent of component (A) and the silicone oil of component (B) are macroscopically uniformly mixed, or a multi-layer type composed of a plurality of layers formed by both components. Specific examples of such a multi-layer type include a two-layer type composed of a layer mainly composed of the oil agent of component (A) and a layer mainly composed of the silicone oil of component (B), and a two-layer type composed of a layer mainly composed of the oil agent of component (A) and a layer in which the oil agent of component (A) and the silicone oil of component (B) are macroscopically uniformly mixed. However, in the case of a multi-layer type, since it is necessary to mix and homogenize a plurality of layers before use, a single-layer type is preferable. In the case of a single-layer cosmetic, it is preferable that the cosmetic is in the form of an oil-in-oil emulsion, and particularly preferably an oil-in-oil emulsion in which the oil agent of component (A) forms a continuous phase and the silicone oil of component (B) forms a dispersed phase. Since the oil agent of component (A) has excellent affinity with solid oil components such as hydrocarbon-based waxes and waxes, when a continuous layer is formed with the oil agent of component (A), high shape retention (shape maintainability such as a stick) can be imparted when producing a solid cosmetic containing a solid oil component.

[0011] The oil agent of (A) usually has a surface tension greater than that of the silicone oil of (B). Since the oil agent of (A) and the silicone oil of (B) are immiscible, when the oil-based cosmetic of the present invention containing both components is applied to the skin or lips, it is considered that the silicone oil of (B) with a smaller surface tension separates to form a surface layer, and the oil agent of (A) with a larger surface tension adheres to the skin side. When powders such as coloring powders and ultraviolet scattering agents are included, most of these powders are dispersed in the oil agent of (A) which has excellent affinity with them, so the silicone layer on the surface is a smooth surface and almost a transparent surface. As a result, it is considered that the oil-based cosmetic has excellent gloss. And since the silicone layer on the surface contains almost no coloring material that causes color transfer (secondary adhesion), it is possible to prevent color transfer of the cosmetic even when it comes into contact with a contacted object such as clothes or a cup. Further, even after the silicone layer on the surface disappears due to contact with clothes or a cup, the oil-based cosmetic of the present invention can maintain good gloss because the refractive index of the remaining oil agent is higher than that of the hydrogenated polyisobutene used in conventional oil-in-oil type cosmetics (for example, Patent Document 1).

[0012] The oil agent of component (A) used in the present invention is an oil agent containing a phytosterol derivative, having a refractive index at 40 °C of 1.50 or more and being liquid at 25 °C. Phytosterol is also called plant sterol and is a component contained in trace amounts in vegetable oils such as soybean oil and rapeseed oil, and is a group of compounds classified as sterols (steroid alcohols). Phytosterol is generally a white solid having a specific odor, but among its derivatives, there are also those that are liquid at 25 °C, such as steladiene described in Patent Document 2. Note that steladiene refers to dehydrated phytosterol having a structure converted to a 3,5-diene structure by eliminating the hydroxyl group at the 3-position of phytosterol. Such steladiene can be obtained by subjecting phytosterol to a dehydration reaction to dehydrate the hydroxyl group at the 3-position, and its specific production method is described in Patent Document 2.

[0013] (A) component oil agent may be an oil substance containing a phytosterol derivative, having a refractive index of 1.50 or more at 40 ° C and being liquid at 25 ° C. However, when the content of the phytosterol derivative is low, the refractive index of the oily base decreases and the gloss when applying the cosmetic decreases. Also, when the silicone layer disappears due to secondary adhesion, the gloss cannot be maintained. A preferable oil agent of component (A) is an oil substance mainly composed of steladiene. Since steladiene is usually obtained by dehydrating the hydroxyl group at the 3-position of phytosterol, it may contain unreacted portions of the starting material phytosterol, other compounds contained as impurities in the starting material, or compounds by-produced in the dehydration reaction of phytosterol. However, these compounds may be included as long as they do not substantially impair the effects of the present invention.

[0014] (A) The refractive index of the oil agent of component (A) at 40 ° C is preferably 1.51 or more, more preferably 1.52 or more. When the refractive index is low, the gloss when applying the cosmetic decreases, and when the surface layer of the silicone oil disappears due to secondary adhesion, the gloss cannot be maintained. The refractive index can be measured by the refractive index measurement method, which is a general test method of the Raw Material Standards for Quasi-Drugs 2006, using an Abbe refractometer (Model: NAR-2T, manufactured by ATAGO Co., Ltd.). Also, the viscosity of the oil agent of component (A) at 25 ° C is usually 20,000 to 60,000 mPa·s, preferably 35,000 to 50,000 mPa·s. The viscosity can be measured by the viscosity measurement method (Method 2), which is a general test method of the Raw Material Standards for Quasi-Drugs 2006, using a BM type viscometer (manufactured by Toki Sangyo Co., Ltd.). Examples of commercially available products of the oil agent of component (A) include Technor SD manufactured by Yokkan Yushi Kogyo Co., Ltd. (Cosmetic Display Name: Phytosterols, Refractive Index 1.52).

[0015] The content of the oil agent of component (A) in the oily cosmetic of the present invention is preferably 5 to 70% by mass, more preferably 5 to 60% by mass, and even more preferably 10 to 50% by mass. When the content of the oil agent of component (A) is excessively low, the persistence of gloss decreases, and when it is excessively high, it becomes difficult to spread when applying the cosmetic.

[0016] In the present invention, as a component of the oily base, a liquid silicone oil that is immiscible with the oil agent (A) at 25°C is used together with the oil agent (A). The liquid silicone oil used is not particularly limited as long as it is immiscible with the oil agent of component (A) at 25°C. In this specification, the term "immiscible" is determined by the following compatibility test.

[0017] (Compatibility Test) Put 10 g each of two kinds of oil agents into a 30 mL transparent glass container (Screw Tube No. 6 manufactured by Maruem Co., Ltd.), heat to 90°C, then cover and shake strongly up and down 20 several times, and let it stand in a room at 25°C. After 24 hours, observe the state of the contents at 25°C. If it corresponds to Score 1 below, it is determined as "miscible". If it corresponds to Score 2 or Score 3 below, it is determined as "immiscible (separated)". Score 1: When it is in a transparent and homogeneous single-phase state. Score 2: When the whole is turbid, or there is a transparent layer in at least one of the upper layer and the lower layer, and the middle layer is turbid. Score 3: When both the upper layer and the lower layer are transparent and there is a clear boundary in the middle, or when transparent droplets of visible size are observed.

[0018] As the silicone oil of component (B), it is preferable to use dimethicone (dimethylpolysiloxane) or dimethiconol that is liquid at 25°C. Specific examples of commercially available products of silicone oil that can be used include the KF-96 series manufactured by Shin-Etsu Chemical Co., Ltd. and the SH200 series manufactured by Dow Corning Toray Co., Ltd., which are dimethicone. Among them, from the viewpoint of low compatibility with the oil agent of component (A), dimethicone is preferable. Its kinematic viscosity at 25°C is preferably 6 to 100,000 mm 2 / s, more preferably 20 to 50,000 mm 2 / s, and even more preferably 100 to 10,000 mm 2 / s. When the viscosity is excessively low, it becomes easier to be compatible with the oil agent of component (A), and when the viscosity is excessively high, it becomes difficult to apply to the skin and lips. Further, when component (B) is dimethiconol, the viscosity at 25°C is preferably 1,000 mPa·s or more.

[0019] The content of the silicone oil of component (B) in the oil-based cosmetic of the present invention is preferably 5 to 70% by mass, more preferably 5 to 60% by mass, and still more preferably 10 to 50% by mass. When the content of the silicone oil of component (B) is small, the color bleeding resistance tends to decrease, and when it is excessively large, the dispersibility of the coloring material tends to decrease.

[0020] The mass ratio [(A) / (B)] of the blending amounts of component (A) and component (B) in the oil-based cosmetic of the present invention is preferably 1 / 10 to 1 / 0.1. More preferably, it is 1 / 5 to 1 / 0.2, and particularly preferably, it is 1 / 2 to 1 / 0.5. When [(A) / (B)] is excessively small, the durability of gloss tends to decrease, and when it is excessively large, the color bleeding resistance tends to decrease.

[0021] The oil-based cosmetic of the present invention preferably contains, as component (C), a separation inhibitor that suppresses the separation of the oil agent of (A) and the silicone oil of (B) when they are mixed. By containing this component (C), the oil-based cosmetic easily forms a stable oil-in-oil emulsion layer. When the oil agent of (A) and the silicone oil of (B) are macroscopically uniformly mixed to form a single layer of oil-in-oil emulsion, in the case of liquid cosmetics, the components (A) and (B) do not separate, and in the case of solid cosmetics, a uniform state is maintained until the solid oil solidifies after melt filling, so sufficient hardness or breaking strength can be achieved. The separation inhibitor may be any one as long as it has a function of suppressing the separation of the oil agent of (A) and the silicone oil of (B) when they are mixed. The determination of whether or not it has a function of suppressing the separation of the two may be carried out according to the method described in Test Example 2 below. When the state after standing for 3 hours is 3 or more of the determination criteria (that is, when there is a transparent layer or a translucent layer in at least one of the upper layer and the lower layer, and the turbid layer is 40% by volume or more and less than 80% by volume), it is determined that it "has a separation suppressing function". The separation inhibitor used is preferably one or more selected from the following (C-1), (C-2), (C-3) and (C-4).

[0022] <(C-1) Lipophilic surfactant with an HLB value of 6 or less> HLB is an index indicating the balance between hydrophilicity and lipophilicity with values from 0 to 20. The closer it is to 0, the higher the lipophilicity, and the closer it is to 20, the higher the hydrophilicity. As methods for calculating the HLB value, various calculation methods are known, and the value is also described in catalogs provided by manufacturers. In this specification, for the HLB value of a lipophilic surfactant, when the lipophilic surfactant is a commercially available product, the HLB value described in the manufacturer's catalog is adopted. When it is not a commercially available product, the value calculated by the Griffin method (HLB value = 20 × sum of the formula weights of the hydrophilic parts / molecular weight) described on page 307 of "Surfactant Handbook" (published by Sangyo Tosho Co., Ltd., issued in 1960) is adopted.

[0023] The lipophilic surfactant with an HLB value of 6 or less in (C-1) is a nonionic surfactant. Specifically, glycerin fatty acid esters such as glyceryl stearate and glyceryl diisostearate; polyglycerin fatty acid esters such as polyglyceryl-2 isostearate, polyglyceryl-2 diisostearate, and polyglyceryl-2 oleate; sorbitan fatty acid esters such as sorbitan isostearate, sesquiisostearic acid sorbitan, sorbitan oleate, and sesquioleic acid sorbitan; propylene glycol fatty acid esters such as propylene glycol stearate; ethylene glycol fatty acid esters such as glycol stearate; silicone surfactants such as polyether-modified silicone and polyglycerin-modified silicone; etc. can be exemplified. Among these, sesquiisostearic acid sorbitan and sesquioleic acid sorbitan are preferably used from the viewpoint of the stability of the oil-in-oil emulsion.

[0024] <(C-2) Ester of polyhydric alcohol and condensed hydroxy fatty acid> The ester of polyhydric alcohol and condensed hydroxy fatty acid is an ester obtained by reacting a condensed hydroxy fatty acid with a polyhydric alcohol. Specific examples of the polyhydric alcohol used as a raw material for such an ester include alkane polyols such as ethylene glycol, pentaerythritol, and glycerin; saccharides such as sucrose; sugar derivatives such as sugar alcohols like sorbitol and mannitol; polyethylene glycol; polyglycerin such as pentaglycerin, hexaglycerin, and decaglycerin; polyalkane polyols such as dipentaerythritol and tripentaerythritol, etc. These are used as one kind or a mixture of two or more kinds. Among the polyhydric alcohols, polyglycerin, pentaerythritol, and dipentaerythritol are preferred, and polyglycerin with a polymerization degree of 2 to 10, more preferably a polymerization degree of 4 to 8, is particularly preferred.

[0025] The condensed hydroxy fatty acid used as the other raw material of the above ester is a condensate of hydroxy fatty acid. In this case, the degree of condensation is usually greater than 1, preferably 3 or more. Hydroxy fatty acid is a fatty acid having one or more hydroxyl groups in the molecule. Specifically, for example, ricinoleic acid, 12-hydroxy stearic acid, hydrogenated castor oil fatty acid (a fatty acid containing a small amount of stearic acid and palmitic acid in addition to 12-hydroxy stearic acid), 12-hydroxy decanoic acid, Iprole acid, 2-hydroxy hexadecanoic acid, 11-hydroxy hexadecanoic acid, 16-hydroxy hexadecenoic acid, 2-hydroxy stearic acid, 9-hydroxy stearic acid, 10-hydroxy stearic acid, 18-hydroxy stearic acid, 9,10-dihydroxy stearic acid and the like can be mentioned, and these are used as one kind or a mixture of two or more kinds. Among hydroxy fatty acids, those having 8 to 22 carbon atoms are preferable, and more preferably 12 to 20 of carbon atoms. Among them, ricinoleic acid, 12-hydroxy stearic acid, 9-hydroxy stearic acid, 10-hydroxy stearic acid, and hydrogenated castor oil stearic acid are preferable, and ricinoleic acid and 12-hydroxy stearic acid are particularly preferable.

[0026] Specific examples of the above esters include polyglycerol condensed ricinoleic acid esters such as tetraglycerol condensed ricinoleic acid ester (cosmetic display name: polyglyceryl-4 polyricinoleate), pentaglycerol condensed ricinoleic acid ester (cosmetic display name: polyglyceryl-5 polyricinoleate), hexaglycerol condensed ricinoleic acid ester (cosmetic display name: polyglyceryl-6 polyricinoleate), decaglycerol condensed ricinoleic acid ester (cosmetic display name: polyglyceryl-10 polyricinoleate): polyglycerol condensed 12-hydroxystearic acid esters such as hexaglycerol condensed 12-hydroxystearic acid ester (cosmetic display name: polyglyceryl-6 polyhydroxystearate), diglycerol di-condensed 12-hydroxystearic acid ester (cosmetic display name: polyglyceryl-2 dipolyhydroxystearate): dipentaerythritol condensed ricinoleic acid ester: dipentaerythritol condensed 12-hydroxystearic acid esters such as tri-condensed 12-hydroxystearic acid dipentaerythrityl (cosmetic display name: tripolyhydroxystearic acid dipentaerythrityl): pentaerythritol condensed ricinoleic acid ester: pentaerythritol condensed 12-hydroxystearic acid ester: tripentaerythritol condensed ricinoleic acid ester: tripentaerythritol condensed 12-hydroxystearic acid ester: polyethylene glycol condensed ricinoleic acid ester: polyethylene glycol condensed 12-hydroxystearic acid esters such as PEG-30 di-condensed 12-hydroxystearic acid ester (cosmetic display name: PEG-30 dipolyhydroxystearate), etc. These can be mentioned, and they are used as a mixture of one or more of these. Among them, esters of condensed ricinoleic acid or condensed 12-hydroxystearic acid with polyglycerol or dipentaerythritol having a polymerization degree of 2 to 10 are preferably used.

[0027] Examples of commercially available products of these esters include Sansoft No. 818R-C (Polyglyceryl-5 Polyricinoleate), manufactured by Sun Chemical Co., Ltd., Hexaglyn PR-15 (Polyglyceryl-6 Polyricinoleate) and Decaglyn PR-20 (Polyglyceryl-10 Polyricinoleate), manufactured by Nikko Chemicals Co., Ltd., and Crester PR (Polyglyceryl-3 Polyricinoleate), manufactured by CRODA Co., Ltd.; Dehymuls PGPH (Polyglyceryl-2 Dihydroxystearate), manufactured by Cognis Co., Ltd., which is a polyglycerol condensed hydroxystearate ester; Saracos WO-6 (Dipentaerythrityl Tripolyhydroxystearate), manufactured by Nisshin Oillio Group, Ltd., which is a dipentaerythritol condensed 12-hydroxystearate ester; Cithrol DPHS (PEG-30 Dihydroxystearate), manufactured by CRODA Co., Ltd., which is a polyethylene glycol condensed 12-hydroxystearate ester; and the like.

[0028] <(C-3) Dipentaerythritol ester of 12-hydroxystearic acid or a mixed fatty acid of 12-hydroxystearic acid and a fatty acid having 12 to 22 carbon atoms> Specific examples of the dipentaerythritol ester of 12-hydroxystearic acid include dipentaerythrityl hexahydroxystearate, dipentaerythrityl tetrahydroxystearate, and the like. Specific examples of the dipentaerythritol ester of a mixed fatty acid of 12-hydroxystearic acid and a fatty acid having 12 to 22 carbon atoms include dipentaerythrityl tetra(hydroxystearate / isostearate), dipentaerythrityl penta(hydroxystearate / isostearate), dipentaerythrityl hexa(hydroxystearate / stearate / rosinate), and the like.

[0029] Examples of commercially available products of the (C-3) component include Cosmol 168M (dipentaerythrityl hexahydroxystearate), Cosmol 168EV (dipentaerythrityl tetra(hydroxystearate / isostearate)), and Cosmol 168AR-V (dipentaerythrityl hexa(hydroxystearate / stearate / rosinate)) manufactured by Nisshin Oillio Group, Ltd. Among these, dipentaerythrityl tetra(hydroxystearate / isostearate) is preferred in terms of the stability of the oil-in-oil type emulsion.

[0030] Dipentaerythritol has six hydroxyl groups, but in terms of the stability of the oil-in-oil type emulsion, it is preferable that some of the hydroxyl groups are not esterified. Tetraesters and pentaesters of dipentaerythritol are more preferred. Specifically, dipentaerythrityl tetrahydroxystearate, dipentaerythrityl tetra(hydroxystearate / isostearate), dipentaerythrityl penta(hydroxystearate / isostearate), etc. are preferably used.

[0031] <(C-4) Fumed silica and / or organically modified clay mineral> Fumed silica is a fine amorphous silica also known as pyrogenic silica, and its appearance is a fluffy, light white powder. Fumed silica can be obtained, for example, by high-temperature hydrolysis of a raw material such as silicon tetrachloride in an oxyhydrogen flame. The specific surface area of fumed silica is preferably 30 m 2 / g or more, more preferably 50 - 400 m 2 / g, and particularly preferably 100 - 400 m 2 / g. When the specific surface area is excessively small, the contribution to the stabilization of the oil-in-oil type emulsion becomes small.

[0032] In addition, the primary particle diameter of these fumed silicas is preferably 50 nm or less, particularly preferably 20 nm or less. The primary particle diameter can be determined as the average value of 3,000 to 5,000 particles measured from an electron micrograph. The fumed silica may be untreated fumed silica showing hydrophilicity or fumed silica subjected to a hydrophobization treatment. Specific examples of the hydrophobization treatment include dimethyldichlorosilane treatment, trimethylsilyl chloride or trimethylsiloxy treatment with hexamethyldisilazane, octylsilane treatment, dimethyl silicone oil treatment, coating baking treatment using methylhydrogenpolysiloxane, coating with metal soap, and the like.

[0033] Commercially available fumed silicas include untreated fumed silicas such as AEROSIL 50, AEROSIL 130, AEROSIL 200, AEROSIL 200V, AEROSIL 200CF, AEROSIL 200FAD, AEROSIL 300, AEROSIL 300CF, AEROSIL 380, AEROSIL 380S (manufactured by Nippon Aerosil Co., Ltd.); hydrophobized ones such as AEROSIL R972, AEROSIL R972V, AEROSIL R972CF, AEROSIL R974, AEROSIL R976S, AEROSIL RX200, AEROSIL RX300, AEROSIL RY200, AEROSIL R202, AEROSIL R805, AEROSIL R812, AEROSIL RA200H (manufactured by Nippon Aerosil Co., Ltd.), CAB-O-SIL TS530 (manufactured by Cabot Corporation), and the like.

[0034] Organically modified clay minerals are those in which the cations of smectite, a swelling layered silicate, are replaced with organic cations such as quaternary ammonium salts. Minerals included in smectite include hectorite, montmorillonite, bentonite, saponite, beidellite, nontronite, stibnite, vermiculite, volkonskoite, sokonite, magadiite, kenyaite, and the like. Examples of organic cations include dimethyldistearylammonium chloride, dimethyldipalmitylammonium chloride, stearylbenzyldimethylammonium chloride, stearyltrimethylammonium chloride, lauryldimethylaminoacetic acid betaine, and the like. The cosmetic designation distearyldimonium hectorite, in which hectorite is replaced with dimethyldistearylammonium cations, is particularly preferably used. An example of a commercially available product of distearyldimonium hectorite is Bentone 38V manufactured by Elementis.

[0035] (C) component is preferably used in combination of a plurality of components of (C-1) to (C-4) from the viewpoint of the stability of the oil-in-oil type emulsion. In particular, the combination of (C-2) component and (C-3) component, and the combination of (C-2) component, (C-3) component and (C-4) component are preferable. The blending amount of the (C) component is preferably 0.1 to 40% by mass, more preferably 1 to 30% by mass, based on the total amount of the cosmetic. By blending the (C) component, it becomes easy to maintain the uniformity of the cosmetic. Further, the blending amount is preferably 0.2 to 80 parts by mass per 100 parts by mass of the total amount of the oil agent of the (A) component and the silicone oil of the (B).

[0036] The oil-based cosmetic of the present invention can contain powder as the (D) component. By containing the powder, the skin and lips can be colored, and the finished texture can be adjusted. When a colored powder is contained to make a makeup cosmetic, it can be made into a makeup cosmetic with excellent gloss, less color transfer, and good color retention. These powders are not particularly limited as long as they are usually used in cosmetics, and any shape (spherical, needle-like, plate-like, etc.), particle size (smoky, fine particles, pigment grade, etc.), and particle structure (porous, non-porous, etc.) can be used. However, in this specification, the smoky silica and organically modified clay minerals of the (C-4) component are not included in the (D) component.

[0037] As the colored powder, inorganic colored powders and organic colored powders are used. Examples of inorganic colored powders include inorganic white pigments such as titanium oxide and zinc oxide; inorganic red pigments such as iron oxide, iron hydroxide, and iron titanate; inorganic brown pigments such as γ-iron oxide; inorganic yellow pigments such as yellow iron oxide and loess; inorganic black pigments such as black iron oxide and carbon black; inorganic purple pigments such as manganese violet and cobalt violet; inorganic green pigments such as chromium hydroxide, chromium oxide, cobalt oxide, and cobalt titanate; inorganic blue pigments such as ultramarine and ultramarine blue; and lustrous pigments such as mica titanium, titanium oxide-coated glass flakes, and aluminum powder.

[0038] Examples of organic colored powders include organic pigments such as Red No. 201, Red No. 202, Red No. 204, Red No. 226, Red No. 228, Orange No. 203, Orange No. 204, Blue No. 404, and Yellow No. 401, those obtained by lake-forming dyes such as Red No. 104, Yellow No. 4, Yellow No. 5, and Blue No. 1, and those obtained by lake-forming natural pigments such as carminic acid, laccaic acid, and carthamin.

[0039] The extender powder is appropriately used for the purpose of adjusting the finish texture and the usability such as stickiness and smoothness. Examples of the extender powder include inorganic extender pigments such as talc, muscovite, synthetic muscovite, phlogopite, synthetic fluorophlogopite, sericite, zeolite, kaolin, bentonite, clay, silicic acid, silicic anhydride (silica), magnesium silicate, magnesium aluminum silicate, calcium silicate, barium sulfate, magnesium carbonate, boron nitride, bismuth oxychloride, alumina, zirconium oxide, hydroxyapatite; organic extender pigments such as silicone powder, silicone elastic powder, polyurethane powder, cellulose powder, nylon powder, silk powder, PMMA powder, starch, polyethylene powder, lauroyl lysine, metallic soap; and composites thereof.

[0040] The blending amount of component (D) used in the present invention is preferably 0.01 to 70% by mass, more preferably 0.1 to 50% by mass, and still more preferably 1 to 30% by mass in the total composition. When the blending amount of component (D) is excessively large, the color bleeding resistance decreases.

[0041] The oil-based cosmetic of the present invention can contain a solid oil component and / or an oil gelling agent as component (E). Such component (E) imparts viscosity or hardness to the oil-based cosmetic, prevents sedimentation of the powder when the dosage form is liquid, contributes to the stability of the system, and contributes to the shape retention of shapes such as stick-like and cake-like when the dosage form is solid. The solid oil component is an oil that is solid at normal temperature, and its melting point is usually 50 to 120°C, preferably 55°C to 105°C, and more preferably 60 to 100°C. The melting point of the solid oil component can be measured by the second method of melting point measurement, which is a general test method for the raw material specifications of quasi-drugs. Using a solid oil component with an excessively low melting point easily causes difficulty in shape retention, and using a solid oil component with an excessively high melting point requires operations at high temperatures, which is disadvantageous in production.

[0042] Specific examples of such solid oils include hydrocarbon waxes such as paraffin wax, polyethylene wax, ethylene-propylene copolymer, microcrystalline wax, ceresin, ozokerite, synthetic wax, and Fischer-Tropsch wax; waxes such as beeswax, carnauba wax, candelilla wax, rice wax, and beeswax (bead wax). etc. ; hydrogenated jojoba oil, hardened oil, higher alcohols, and synthetic alcohols with an alkyl chain carbon number of 20 ~ to 50, silicone wax, and the like.

[0043] Commercially available products of these solid oils include paraffin waxes such as Paraffin Wax 135, Paraffin Wax 140, Paraffin Wax 150, and HNP-11 manufactured by Nippon Seiro Co., Ltd.; HNP-9, Hi-Mic-2065, Hi-Mic-1070, Hi-Mic-1080, Hi-Mic-1090, and HNP-0190 of microcrystalline wax manufactured by Nippon Seiro Co., Ltd.; Multiwax W-445 manufactured by Sonneborn; PERFORMALENE 400, PERFORMALENE 500, and PERFORMALENE 655 of polyethylene wax manufactured by NEW PHASE TECHNOLOGIES; CIREBELLE 108 and CIREBELLE 305 of synthetic wax (Fischer-Tropsch wax) manufactured by CIREBELLE; SASOLWAX TITANEL manufactured by SASOL; refined candelilla wax NO.1, candelilla NC1630 of Cerica Noda Co., Ltd. for candelilla wax; refined candelilla wax CG-7, refined candelilla wax SR-3 of Yokkan Yushi Kogyo Co., Ltd.; refined candelilla wax CG-7, refined candelilla wax SR-3 of Nippon Natural Products Co., Ltd.; high melting point candelilla wax FR100 of Nippon Natural Products Co., Ltd., and the like.

[0044] The above-mentioned oil gelling agent is soluble or dispersible in an oil that is liquid at room temperature, and has the function of thickening or gelling the oil at room temperature. Examples of such oil gelling agents include dextrin fatty acid esters, inulin fatty acid esters, sucrose fatty acid esters, starch fatty acid esters, metal soaps, 12-hydroxystearic acid, and the like.

[0045] The above dextrin fatty acid ester is an ester of dextrin or reduced dextrin and a higher fatty acid, and examples thereof include dextrin palmitate, dextrin palmitate / 2-ethylhexanoate, and the like. Commercially available products of dextrin palmitate include, for example, Leopal KL2 and Leopal TL2 manufactured by Chiba Flour Milling Co., Ltd., and commercially available products of dextrin palmitate / 2-ethylhexanoate include, for example, Leopal TT2 manufactured by Chiba Flour Milling Co., Ltd. The above inulin fatty acid ester is an ester of inulin, which is a type of fructooligosaccharide, and a higher fatty acid. Inulin having an average molecular weight of 300 to 10,000 is preferably used. A specific example of the inulin fatty acid ester is inulin stearate, and commercially available products thereof include, for example, Leopal ISK2 (manufactured by Chiba Flour Milling Co., Ltd.). The above sucrose fatty acid ester is an oil-soluble sucrose fatty acid ester, and specific examples thereof include sucrose stearate, sucrose acetate stearate, and the like. Commercially available products include Sugar Wax S-10E, Cosmerike S-10, Sugar Wax A-10E (all manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), and the like. Examples of the above metal soap include aluminum stearate, calcium stearate, and the like.

[0046] The above component (E) may be selected from a single compound or may be used by appropriately combining two or more compounds. The content of component (E) is usually 1 to 40% by mass, preferably 3 to 30% by mass, more preferably 5 to 25% by mass based on the whole oily cosmetic. If the amount of component (E) is excessively small, separation of the oil-in-oil type emulsion and sedimentation of the powder are likely to occur, resulting in a decrease in the stability of the system. If the amount is excessively large, the elongation during use is poor and it becomes difficult to apply. When preparing a solid oily cosmetic, it is preferable to use a solid oil component having a melting point of 50 to 120 °C as component (E), whereby particularly good shape retention can be obtained.

[0047] In addition to the above essential components and optional components, the oily cosmetic of the present invention can contain components commonly used in ordinary cosmetics. That is, non-volatile oil components, volatile oil components, oil-soluble resins, surfactants not corresponding to (C-1), water, polyhydric alcohols (for example, glycerin, propylene glycol, butanediol, etc.), lower alcohols (ethanol, isopropyl alcohol, etc.), ultraviolet absorbers (for example, dimethyldiethyl benzalomalonate, ethylhexyl methoxycinnamate, etc.), moisturizers, fragrances, antioxidants, preservatives, antifoaming agents, fibers, various extracts, etc. can be contained within a range that does not impair the effects of the present invention. Examples of surfactants other than component (C-1) include nonionic surfactants having an HLB value exceeding 6, anionic surfactants, amphoteric surfactants, cationic surfactants, etc. Further, dimethyldiethyl benzalomalonate, which is an ultraviolet absorber, is preferably used because it contributes to the stabilization of the oil-in-oil type emulsion.

[0048] The oily cosmetic of the present invention can be prepared according to conventional methods. For example, all raw materials are heated to a temperature above the melting point, uniformly mixed, and then poured into a container, mold, etc. while in a molten state, and cooled or allowed to cool to obtain an oily solid cosmetic. Also, after heating all raw materials to a temperature above the melting point, it can be made into a liquid or paste-like preparation by cooling while stirring. It can also be obtained by pre-kneading coloring materials with some oily components and / or surfactant components, and then heating and mixing with the remaining components.

[0049] As uses of the oily cosmetic of the present invention, when it contains a colored powder, examples include lipstick, lip gloss, eyeshadow, face color, concealer, foundation, makeup base, sunscreen, hair coloring agent, etc. Among them, it is particularly suitable for lipstick and lip gloss. Also, when the oily cosmetic of the present invention does not contain a colored powder, it can be used as a top coat material to be used on top of a makeup cosmetic containing a colored powder. In that case, the presence of the top coat layer can improve the gloss, color transfer resistance, and makeup retention of the makeup cosmetic containing a colored powder. Examples of the makeup cosmetics targeted by the top coat material include lipstick, foundation, and eye color. It is particularly suitable for a lipstick top coat (also referred to as a lipstick overcoat or lip coat). The form of the oily cosmetic of the present invention can be appropriately selected according to the use. For example, it can be in a liquid, paste, solid, etc. form. The oily solid cosmetic filled in a gold plate, resin plate, stick container, etc. has the advantages of being easy to use and easy to carry.

Examples

[0050] Hereinafter, the present invention will be described more specifically based on examples, but the present invention is not limited by these examples. Also, the method for determining whether or not it corresponds to the oil agent of component (B) used in the present invention was shown in Test Example 1, and the method for determining whether or not it corresponds to the separation inhibitor of component (C) which is an optional component was shown in Test Example 2. In addition, "parts" and "%" in the following examples, comparative examples, and test examples represent "parts by mass" and "mass % based on the total amount" unless otherwise specified. Also, the evaluation method of the oily cosmetic in the following examples and comparative examples is as follows.

[0051] (Evaluation items) A. Color fastness: Ten professional panelists applied the sample to their lips, and after 10 minutes, they used a coffee cup and evaluated it based on the shade of the lip mark transferred to the cup. B. Color retention: Ten professional panelists applied the sample to their lips and conducted a five - stage sensory evaluation based on the following scoring criteria (scores). C. Gloss immediately after application: Ten professional panelists applied the sample to their lips and conducted a five - stage sensory evaluation based on the following scoring criteria (scores). D. Persistence of gloss: Ten professional panelists applied the sample to their lips and conducted a five - stage sensory evaluation based on the following scoring criteria (scores). E. Filling and molding property: For solid samples, a fracture strength test was conducted, and the filling and molding property was evaluated based on the magnitude of the fracture strength. That is, the sample filled and molded in a stick container with a diameter of 10 mm was horizontally held on the sample stage of a rheometer (FUDOH rheometer manufactured by Rheotech Co., Ltd.) in an environment of 30°C. A T - type plunger was applied at a position 10 mm from the tip of the middle plate of the stick, and the sample stage was raised at a speed of 2 cm / min. The stress (gf) when the stick broke was measured and taken as the fracture strength. When it solidified in a uniform state, the fracture strength value was high, and when separation of the oil - in - oil type emulsion occurred before solidification, the fracture strength value became low. When the fracture strength value (gf) was 80 or more, it was determined as S, 50 or more and less than 80 as A, 30 or more and less than 50 as B, and less than 30 as C. Ka. Separation stability: A liquid or semi-solid sample was placed in a glass bottle and stored in a thermostat at 50°C. If no separation was observed for more than 2 weeks, it was rated S; if no separation was observed for more than 1 week but less than 2 weeks, it was rated A; if no separation was observed for more than 2 days but less than 1 week, it was rated B; if separation occurred within 1 day, it was rated C.

[0052] (Score) 5 points: Extremely excellent. 4 points: Excellent. 3 points: Ordinary. 2 points: Inferior. 1 point: Extremely inferior. (Evaluation criteria) S: Average score of 4.0 points or more A: Average score of more than 3.5 points and less than 4.0 points B: Average score of more than 2.5 points and less than 3.5 points C: Average score of less than 2.5 points

[0053] Test Example 1 (Compatibility test) The compatibility of the oil agent (Sample 1 below) of component (A) used in the present invention and the liquid oil components to be evaluated (Samples 2-1 to 2-5 and 3-1 to 3-6 below) was evaluated according to the following test method and judgment criteria. The results are shown in Table 1. As the oil components to be evaluated, liquid oil components generally used in cosmetics were selected.

[0054] Test method 10 g of the oil agent of Sample 1 below and 10 g of the oil agent to be evaluated were placed in a 30 mL transparent glass container (Screw Tube No. 6 manufactured by Maruem Co., Ltd.), heated to 90°C, then covered and strongly shaken up and down 20 times, and left standing in a 25°C room. After 24 hours, the state of the contents was visually observed at 25°C and ranked according to the following judgment criteria. When the score is 1, it is judged as "compatible"; when the score is 2 or 3, it is judged as "incompatible".

[0055] Judgment criteria Score 1: When in a transparent and homogeneous single-phase state. Score 2: When the whole is turbid, or when there is a transparent layer in at least one of the upper and lower layers and the middle layer is turbid. Score 3: When both the upper and lower layers are transparent and there is a clear boundary in the middle, or when transparent droplets of a visually observable size are observed.

[0056] The samples used in the test are as follows. Sample 1 The oil agent of component (A): According to the description of Example 2 of Patent No. 6,353,939 (Patentee: Yokkan Oil & Fat Industry Co., Ltd.), phytosterol obtained from soybean oil and rapeseed oil was subjected to a dehydration reaction using p-toluenesulfonic acid monohydrate as a catalyst to eliminate the hydroxyl group at the 3-position, and a liquid oil substance at 25°C (stigmasterol content 90% or more, refractive index at 40°C 1.52) was obtained. Sample 2-1 Dimethicone (kinematic viscosity at 25°C 20 mm 2 / s, trade name: KF-96A-20cs, manufactured by Shin-Etsu Chemical Co., Ltd.) Sample 2-2 Dimethicone (kinematic viscosity at 25°C 100 mm 2 / s, trade name: KF-96A-100cs, manufactured by Shin-Etsu Chemical Co., Ltd.) Sample 2-3 Dimethicone (kinematic viscosity at 25°C 1000 mm 2 / s, trade name: KF-96-1000cs, manufactured by Shin-Etsu Chemical Co., Ltd.) Sample 2-4 Dimethicone (kinematic viscosity at 25°C 3000 mm 2 / s, trade name: KF-96-3000cs, manufactured by Shin-Etsu Chemical Co., Ltd.) Sample 3-1 Dimethicone (kinematic viscosity at 25°C 2 mm 2 / s, trade name; KF-96L-2cs, manufactured by Shin-Etsu Chemical Co., Ltd.) Sample 3-2 Diphenylsiloxyphenyltrimethicone (kinematic viscosity at 25°C 15 mm 2 / s, trade name: KF-56A, manufactured by Shin-Etsu Chemical Co., Ltd.) Sample 3-3 Diphenyldimethylsilicone (kinematic viscosity 400 mm 2 / s, trade name: KF-54, manufactured by Shin-Etsu Chemical Co., Ltd.) Sample 3-4 Isononyl isononanoate (ester oil, trade name: Sarakos 99, manufactured by Nisshin Oillio Group Ltd.) Sample 3-5 Triethylhexanoin (ester oil, trade name: T.I.O, manufactured by Nisshin Oillio Group, Ltd.) Sample 3-6 Polyisobutene (hydrocarbon oil, trade name: Pearl Rim 24, manufactured by NOF Corporation)

[0057] Compatibility test results (compatibility with the oil agent of Sample 1)

[0058] [Table 1]

[0059] From the results in Table 1, it was confirmed that even for silicone oils, the compatibility with the oil agent of Sample 1 varies depending on the viscosity, and phenyl-modified silicone oil, ester oil, and hydrocarbon oil are compatible with the oil agent of Sample 1. Also, when a commercially available oily substance (manufactured by Yokkan Yushi Kogyo Co., Ltd., trade name: Technor SD, indicated name: Phytosterols, refractive index 1.52) was used as the oil agent of component (A) instead of Sample 1, almost the same results as in the case of Sample 1 were obtained.

[0060] Test Example 2 (Stabilization (separation inhibition effect) test of oil-in-oil type emulsion) A third-component compound was added to a mixture of an oil agent of component (A) and a silicone oil of component (B) that are immiscible with each other, and it was evaluated whether the compound has an effect of suppressing the separation between the oil agent of component (A) and the silicone oil of component (B) according to the following test method and criteria. The results are shown in Table 2.

[0061] Test method 10 g of the oil agent of component (A) (Sample 1 above) and the silicone oil of component (B) (dimethyl silicone, kinematic viscosity at 25°C: 1000 mm 2 / s, Trade name: KF-96-1000cs, manufactured by Shin-Etsu Chemical Co., Ltd.) 10 g was placed in a 30 mL transparent glass container (screw tube No. 6 manufactured by Maruemu Co., Ltd.), 4 g of the compound to be evaluated (Samples 4-1 to 4-6 and 5-1 to 5-3 below) was added, heated to 90 °C, then covered and shaken strongly up and down 20 times, and left standing in a 25 °C room. The state of the contents was visually observed at 25 °C after 3 hours and 24 hours.

[0062] Judgment criteria 5: Uniformly turbid. 4: There is a transparent layer or a translucent layer in at least one of the upper layer and the lower layer, and 80% by volume or more of the whole is turbid. 3: There is a transparent layer or a translucent layer in at least one of the upper layer and the lower layer, and the turbid layer is 40% by volume or more and less than 80% by volume. 2: There is a transparent layer or a translucent layer in at least one of the upper layer and the lower layer, and the turbid layer is 1% by volume or more and less than 40% by volume. 1: Both the upper layer and the lower layer are transparent and there is a clear boundary in the middle. Or, transparent droplets of visible size are observed. In the present invention, when the state after 3 hours have elapsed after standing corresponds to 3 or more of the above judgment criteria, that is, corresponds to 3, 4, or 5, it is determined that "it has a separation suppressing function".

[0063] The compounds used as the evaluation targets are as follows. Sample 4-1 Sorbitan sesquisoisostearate (Trade name: SI-15R, manufactured by Nikko Chemicals Co., Ltd.) Sample 4-2 Polyglyceryl-2 diisostearate (Trade name: Cosmoll 42V, manufactured by Nisshin Oillio Group Ltd.) Sample 4-3 Polyglyceryl-5 polylinoleate (Trade name: Sansoft No. 818R-C, manufactured by Taiyo Chemical Co., Ltd.) Sample 4-4 Dipentaerythrityl tripolyhydroxystearate (Trade name: Saracos WO-6, manufactured by Nisshin Oillio Group Ltd.) Sample 4-5 Dipentaerythrityl tetra(hydroxystearate / isostearate) (Trade name: Cosmoll 168EV, manufactured by Nisshin Oillio Group Ltd.) Samples 4-6 Fumed silica (trade name: AEROSIL 300, manufactured by Ae Rhodia, Japan) Sample 5-1 Polyisobutene (trade name: Pearl Rim 24, manufactured by NOF Corporation) Sample 5-2 Neopentyl glycol dicaprate (trade name: Estol N-01, manufactured by Nisshin Oillio Group, Ltd.) 5-3 Diphenylsiloxyphenyltrimethicone (trade name: KF-56A, manufactured by Shin-Etsu Chemical Co., Ltd.)

[0064] Stabilization test results (effect of suppressing separation of the third component)

[0065]

Table 2

[0066] As shown in the results of Table 2, when the compounds (Samples 4-1 to 4-6) of (C-1) to (C-4) were added to a mixture of the oil agent of the incompatible (A) component and the silicone oil of the (B) component, the separation of the (A) component and the (B) component was suppressed. That is, it can be seen that these compounds have the function of suppressing the separation of the oil agent of the (A) component and the silicone oil of the (B) component. On the other hand, when the third component was not used (without the third component), when polybutene, which is a hydrocarbon oil, was added (Sample 5-1), when neopentyl glycol dicaprate (see Patent No. 6184454), which is a known compatibility regulator for polybutene and silicone oil, was added (Sample 5-2), and when diphenylsiloxyphenyltrimethicone, which is a kind of silicone oil, was added (Sample 5-3), no separation suppressing effect was observed. Also, when a commercially available oil substance (Technol SD, manufactured by Yokose Oil & Fat Co., Ltd.) was used as the oil agent of the (A) component instead of Sample 1, almost the same results as in the case of Sample 1 were obtained.

[0067] Example 1 and Comparative Examples 1-2 (Lipstick) A stick lipstick having the formulation shown in Table 3 was prepared according to the following manufacturing procedure, and evaluated for color fastness to rubbing, color retention, gloss, gloss persistence, and filling moldability by the above methods. The evaluation results are as shown in Table 3.

[0068] (Manufacturing Procedure) (1) Heat components 1 to 14 shown in Table 3 to approximately 90°C and mix them uniformly. (2) After filling a stick container at 80°C while in a molten state, allow it to cool and solidify into a solid lipstick.

[0069]

Table 3

[0070] As shown in the results of Table 3, the lipstick of Example 1 containing the oil agent of component (A) and the silicone oil of component (B) that is incompatible with it was excellent in color fastness to migration, color retention, gloss and gloss persistence, and filling moldability. In contrast, the lipstick of Comparative Example 1 in which the oil agent of component (A) was replaced with polyisobutene described in Patent Document 1 was greatly inferior in gloss persistence. Also, the lipstick of Comparative Example 2 using diphenylsiloxyphenyltrimethicone described in Patent Document 1 as the silicone oil was inferior in color fastness to migration, and also inferior in color retention and gloss persistence.

[0071] Examples 2 to 7 (Lipstick) Prepare a solid lipstick with the formulation shown in Table 4 according to the above manufacturing procedure, and evaluate its color fastness to migration, color retention, gloss, gloss persistence, and filling moldability by the above method. The evaluation results are as shown in Table 4.

[0072]

Table 4

[0073] As shown in the results of Table 4, the lipsticks of Examples 2 to 7 containing the oil agent of component (A) and the silicone oil of component (B) which is incompatible with it were excellent in color bleeding resistance, color retention, gloss and gloss persistence. In particular, the lipsticks of Examples 2 to 6 containing the compound corresponding to (C-1), (C-2) or (C-3) as the separation inhibitor were excellent in filling moldability compared to the lipstick of Example 7 not containing the separation inhibitor. Comparing the lipstick of Example 1 shown in Table 3 with the lipsticks of Examples 2, 3 and 6, Example 1 containing the components of (C-2), (C-3) and (C-4) simultaneously as component (C) showed the most excellent filling moldability.

[0074] Example 8 and Comparative Example 3 (Lip Gloss) The paste-like lip gloss of the formulation shown in Table 5 was prepared according to the following manufacturing procedure, and evaluated for color bleeding resistance, color retention, gloss, gloss persistence and separation stability by the above method. The evaluation results are as shown in Table 5.

[0075] (Manufacturing Procedure) (1) Heat Components 1 to 13 shown in Table 5 to about 90 °C and mix uniformly. (2) Fill a lip gloss container with an applicator attached to the cap at 70 °C, allow to cool, and obtain a paste-like lip gloss.

[0076]

Table 5

[0077] As shown in the results of Table 5, the lip gloss of Example 8 containing the oil agent of component (A) and the silicone oil of component (B) was excellent in color bleeding resistance, color retention, gloss, gloss persistence and separation stability. On the other hand, the lip gloss of Comparative Example 3 in which component (B) was replaced with dimethicone having a kinematic viscosity of 2 mm 2 / s compatible with the oil agent of component (A) was not sufficient in color bleeding resistance and gloss persistence, and the color retention was also not satisfactory.

[0078] Example 9 (Two-layer liquid lipstick) A two-layer liquid lipstick with the formulation shown in Table 6 was prepared according to the following manufacturing procedure, and its color fastness, color retention, gloss, and gloss persistence were evaluated by the above methods. This liquid lipstick separated into two layers within a few hours after standing. The upper layer was a layer mainly composed of the oil agent of (A), and the lower layer was an oil-in-oil type emulsion layer composed of the oil agent of (A) and the silicone oil of (B). The separation between the oil agent of (A) and the silicone oil of (B) was suppressed by the fumed silica of (C-4). The evaluation results are as shown in Table 6. Note that the two-layer liquid lipstick should be shaken well before use to make it uniform for application.

[0079] (Manufacturing procedure) (1) Ingredients 1 to 8 shown in Table 6 were heated to about 90 °C and mixed uniformly. (2) After cooling to room temperature, it was filled into a lip gloss container with an applicator attached to the cap to obtain a two-layer liquid lipstick.

[0080]

Table 6

[0081] From the results in Table 6, it was found that the liquid lipstick of Example 9 containing the oil agent of component (A) and the silicone oil of component (B) which is incompatible with it is excellent in color fastness, color retention, gloss, and gloss persistence.

[0082] Example 10 (Lipstick top coat) A paste-like lipstick top coat with the formulation shown in Table 7 was prepared according to the following manufacturing procedure, and it was applied on the lips coated with a commercially available lipstick (ACRO THREE Dear Ring Lipstick 02). Its color fastness, color retention, gloss, gloss persistence, and separation stability were evaluated by the above methods. The evaluation results are as shown in Table 7.

[0083] (Manufacturing procedure) (1) Ingredients 1 to 7 shown in Table 7 were heated to about 90 °C and mixed uniformly. (2) The container with an applicator attached to the cap was filled at 70 °C and allowed to cool, obtaining a paste-like lipstick top coat.

[0084]

Table 7

[0085] As shown by the results in Table 7, the lipstick top coat of Example 10 containing the oil agent of component (A) and the silicone oil of component (B) that is incompatible with it was excellent in color transfer resistance, color retention, gloss, and gloss persistence when used on top of the lipstick, and also excellent in separation stability.

Industrial Applicability

[0086] According to the present invention, there is provided an oily cosmetic excellent in color transfer resistance, color retention, gloss, and gloss persistence when applied to the skin or lips.

Claims

1. An oil-based cosmetic comprising: (A) an oil agent containing steardien as a main component, having a refractive index of 1.50 or more at 40°C and being liquid at 25°C; and (B) a liquid silicone oil selected from dimethicone and dimethiconol, which is immiscible with the oil agent of (A) at 25°C, as an oily base, and (C) a separation inhibitor for the oil agent of (A) and the silicone oil of (B).

2. The oil-based cosmetic according to Claim 1, further comprising (D) powder.

3. The oil-based cosmetic according to Claim 1 or 2, further comprising (E) a solid oil component and / or an oily gelling agent.

4. The oil-based cosmetic according to any one of Claims 1 to 3, which is an oil-in-oil type emulsified cosmetic.

5. The oil-based cosmetic according to any one of Claims 1 to 4, wherein the blending amount of the oil agent of (A) is 5 to 70% by mass, the blending amount of the silicone oil of (B) is 5 to 70% by mass, and the mass ratio [(A) / (B)] of the blending amounts of (A) and (B) is 1 / 10 to 1 / 0.

1.

6. The oil-based cosmetic according to any one of Claims 1 to 5, wherein the blending amount of the separation inhibitor of (C) is 0.1 to 40% by mass and is 0.2 to 80 parts by mass per 100 parts by mass of the total amount of (A) and (B).

7. The oil-based cosmetic according to any one of Claims 1 to 6, wherein the separation inhibitor of (C) is one or more selected from the following (C-1) to (C-4). (C-1) A lipophilic surfactant having an HLB value of 6 or less (C-2) An ester of a polyhydric alcohol and a condensed hydroxy fatty acid (C-3) A dipentaerythritol ester of 12-hydroxystearic acid and / or a dipentaerythritol ester of a mixed fatty acid of 12-hydroxystearic acid and a fatty acid having 12 to 22 carbon atoms (C-4) Fumed silica and / or an organically modified clay mineral

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