Oil-based cosmetics

Abstract

To provide an oil-based cosmetic that enables the edge of a coated site to be clear and gives a finish with a depth feeling.SOLUTION: An oil-based cosmetic contains following components (A), (B), (C) and (D): (A) an oil gelator, (B) a semisolid oil with a melting point of 30-60°C, (C) nonvolatile liquid oil, and (D) substoichiometric titanium oxide-coated particles having dichroicity with different appearance and interference colors.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an oil-based cosmetic.

Background Art

[0002] Conventionally, dichroic pigments having different appearance colors and interference colors have been known. For example, Patent Document 1 describes a pigment having dichroism with different appearance colors and interference colors by forming a single layer of lower-order titanium oxide on plate-like particles, and it is described that a cosmetic using this pigment can obtain a three-dimensional feeling and a uniform cosmetic film.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in a conventional cosmetic containing a dichroic pigment, the boundary of the applied part was not clear, and a finished product with a sense of depth could not be obtained.

Means for Solving the Problems

[0005] The present inventors have found that an oil-based cosmetic using dichroic titanium oxide-coated particles together with an oil gelling agent, a semi-solid oil, and a non-volatile liquid oil has a clear boundary at the applied part and can obtain a finished product with a sense of depth.

[0006] The present invention provides the following components (A), (B), (C), and (D): (A) An oil gelling agent, (B) A semi-solid oil having a melting point of 30 to 60°C, (C) A non-volatile liquid oil, (D) Titanium oxide-coated particles having dichroism with different appearance colors and interference colors This relates to an oily cosmetic product containing [a specific ingredient]. [Effects of the Invention]

[0007] The oil-based cosmetic composition of the present invention provides a clear outline at the application site, and in particular, when used as a lipstick, it clearly defines the contour of the lips and gives a finish with a sense of depth. In other words, the oily cosmetic composition of the present invention contains an oil gelling agent (component A) and a semi-solid oil (component B), which allows for the formation of a smooth coating film with a certain thickness. Because the cosmetic composition has appropriate elasticity, it is possible to impart thickness to the coating film even when the same amount is applied, compared to low-elasticity agents that drip after application. Furthermore, compared to highly elastic agents that do not spontaneously change shape after application, leveling after application makes it easier to achieve uniform thickness and form flat surfaces. For example, unevenness such as lip wrinkles can be filled in and smoothed with the cosmetic composition. With low-elasticity agents that drip after application, the cosmetic composition would only fill in the wrinkles and would not easily smooth them. In this way, the formation of a smooth coating film with a certain thickness makes it possible to effectively display the dichroism of the low-order titanium oxide coated particles in the flat areas and edges of the coating film, resulting in a clearer edge to the coated area and a finish with a sense of depth, as described above. [Modes for carrying out the invention]

[0008] The oil gelling agent used in component (A) in the present invention is one that is commonly used in cosmetics, such as solid wax, metal soap, organically modified clay mineral, nanosilica, dextrin fatty acid ester, and amino acid-based gelling agent.

[0009] Examples of solid waxes include those with a melting point of 61°C or higher. Waxes with a melting point of 61°C or higher exhibit solid properties at 25°C. In this invention, the melting point is measured by Method 3 of the general test methods described in the Cosmetic Raw Materials Standards. Specifically, the sample is gradually heated to 90-92°C while stirring to melt it, then the heating is stopped and the sample is allowed to cool to a temperature 8-10°C above its melting point. Next, the thermometer (petrolatum melting point thermometer specified in Japanese Industrial Standard B7410) is cooled to 5°C, the moisture is wiped off with filter paper, half of the mercury bulb is inserted into the sample, and then immediately removed. The sample is kept vertical and allowed to cool. When the attached sample becomes cloudy, it is immersed in water at a temperature of 16°C or lower for 5 minutes. Next, the thermometer is inserted into the test tube and fixed with a cork so that the distance between the lower end of the thermometer and the bottom of the test tube is 15 mm. This test tube is then placed in a 500 mL beaker containing water at approximately 16°C, with the bottom of the test tube fixed so that the distance between the bottom of the test tube and the bottom of the beaker is 15 mm, and the bath is heated at a rate of 2°C per minute until the temperature reaches 30°C. Next, heating is continued at a rate of 1°C per minute, and the temperature is measured when a drop of the sample leaves the thermometer. This test is performed three times. If the difference in measurements is less than 1°C, the average value is taken. If the difference is 1°C or more, five measurements are taken and the average value is taken as the melting point.

[0010] Such waxes are not limited to those commonly used in cosmetics, and include, for example, mineral waxes such as ozokerite and ceresin; petroleum waxes such as paraffin and microcrystalline wax; synthetic hydrocarbons such as Fischer-Tropsch wax, polyethylene wax, and synthetic hydrocarbon wax; plant waxes such as carnauba wax, candelilla wax, rice wax, and sunflower wax; animal waxes such as beeswax and whale wax; and synthetic waxes such as silicone wax and synthetic beeswax. Of these, paraffin, microcrystalline wax, and synthetic hydrocarbon wax are preferred from the viewpoint of improving shape retention, improving usability, and efficiently gelling the oil to give the coating film an appropriate thickness. Furthermore, from the viewpoint of improving storage stability, improving usability, and efficiently gelling the oil to impart an appropriate thickness to the coating film, the solid wax is preferably melted at 65°C or higher and 140°C or lower, and more preferably at 70°C or higher and 105°C or lower.

[0011] Examples of metal soaps include fatty acid metal salts such as zinc stearate, aluminum stearate, calcium stearate, magnesium stearate, aluminum myristate, and zinc myristate. Of these, it is preferable to include at least zinc stearate, from the viewpoint of improving usability and efficiently gelling the oil to impart an appropriate thickness to the coating film.

[0012] As for organically modified clay minerals, any type commonly used in cosmetics can be used without limitation. For example, cationically modified clay minerals obtained by treating layered clay minerals such as bentonite, laponite, hectorite, montmorillonite, and aluminum magnesium silicate with a quaternary ammonium salt type cationic surfactant are preferred. Here, the quaternary ammonium salt type cationic surfactant is given by the following formula (1):

[0013] [ka]

[0014] (In the formula, R 1 R represents an alkyl group or benzyl group having 10 to 22 carbon atoms. 2 R represents a methyl group or an alkyl group having 10 to 22 carbon atoms. 3 and R 4 (where X represents an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms, and X represents a halogen atom or methyl sulfate residue.) It is represented by [this].

[0015] Specifically, dodecyltrimethylammonium chloride, myristyltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, myristyldimethylethylammonium chloride, cetyl-dimethylethylammonium chloride, stearyldimethylethylammonium chloride, behenyldimethylethylammonium chloride, myristyldiethylethylammonium chloride, cetyl-diethylethylammonium chloride, stearyldiethylethylammonium chloride, behenyldiethylethylammonium chloride, benzyldimethylmyristylammonium chloride, benzyldimethylcetylammonium chloride, benzyldimethylstearylammonium chloride, benzyldimethylbehenylammonium chloride, benzylmethylethylcetylammonium chloride, benzylmethylethylstearylammonium chloride, distearyldimethylammonium chloride, dibehenyldihydroxyethylammonium chloride, and those obtained by replacing the chlorides of the above compounds with bromide compounds, and further dipalmitoylpropylammonium methyl sulfate, etc. may be mentioned. Among these, from the viewpoint of efficiently gelling the oil agent and imparting an appropriate thickness to the coating film, benzyldimethylstearylammonium chloride and distearyldimethylammonium chloride are preferable, and those containing at least distearyldimethylammonium chloride are more preferable.

[0016] Examples of the cation-modified clay mineral obtained by treating the layered clay mineral with a quaternary ammonium salt-type cationic surfactant include dimethyldistearylammonium hectorite, dimethyldistearylammonium bentonite, benzyldimethylstearylammonium hectorite, etc., and dimethyldistearylammonium hectorite is more preferable. Commercially available products include Benton 38, Benton 38VCG, Benton 27 (manufactured by Elementis Japan Co., Ltd.), etc.

[0017] Organically modified clay minerals can also be used as a dispersion diluted with a solvent from the viewpoints of improving workability and having an excellent thickening effect on oil. Specifically, it is preferable to use a premix gel in which the organically modified clay mineral is previously dispersed in a solvent. The solvent is not limited as long as it can be thickened by the organically modified clay mineral, but from the viewpoint of the thickening effect on oil, octyldodecanol, mineral oil, etc. are preferable. Further, from the viewpoint of efficiently dispersing the organically modified clay mineral to exhibit the thickening effect, it is preferable to contain polar additives such as propylene carbonate, ethanol, water, various surfactants, etc. The content of the organically modified clay mineral in the premix gel is preferably 5 to 25% by mass, more preferably 8 to 20% by mass, and still more preferably 10 to 18% by mass from the viewpoints of improving workability, the thickening effect on oil, and suppressing oil separation of the thickened oily gel itself. As the premix gel, commercially available products such as benton gel EUGV containing 10% by mass of cation-modified clay mineral, benton gel MIOV, benton gel VS-5 PCV containing 18% by mass, and benton gel PTM containing 15% by mass (above, manufactured by Elementis Japan Co., Ltd.) can be used.

[0018] Nanosilica refers to silica particles having an average primary particle size of 100 nm or less. From the viewpoint of efficiently gelling the oil agent and imparting an appropriate thickness to the coating film, the average particle size is preferably 5 to 100 nm, more preferably 10 to 80 nm, and still more preferably 10 to 40 nm. Further, nanosilica has a specific surface area by the BET method of 5 m 2 / g or more, preferably 10 m 2 / g or more, more preferably 450 m 2 / g or less, preferably 420 m 2 / g or less, more preferably, from the viewpoints of improving the feeling of use and efficiently gelling the oil agent and imparting an appropriate thickness to the coating film. It is preferable that the surface of nanosilica is hydrophobized in order to improve its affinity with various oils. Examples of hydrophobization treatments include silicone treatment, metal soap treatment, alkyl treatment, fluorine treatment, amino acid treatment, and resin polymer treatment, with silicone treatment and alkyl treatment being particularly preferred. Examples of commercially available nanosilica products include Aerosil OX50, RX50, RY50, RY51, RM50, RM50, NAX50, NY50, NA50H, NA50Y, 90G, NA90G, REA90, 130, R972, R972CF, R972V, RY200S, 150, R202, 200, 200CF, and 200. Examples include 00V, R974, R9200, RX200, R8200, RY200, RY200L, RA200H, RA200HS, REA200, R805, R711, R7200, 400, R976, R976S, RX300, R812, R812S, RY300, and 380 (all manufactured by Nippon Aerosil Co., Ltd.).

[0019] The dextrin fatty acid ester is not limited as long as it is commonly used in cosmetics, but esters of dextrin with a fatty acid having 8 to 24 carbon atoms are preferred, and esters of dextrin with a fatty acid having 14 to 20 carbon atoms are more preferred. Furthermore, it is preferable that the average degree of polymerization of the dextrin is 3 to 150. Specifically, examples include dextrin palmitate, dextrin stearate, palmitic acid / dextrin stearate, dextrin oleate, dextrin isopalmitate, dextrin isostearate, dextrin myristate, and dextrin palmitate / 2-ethylhexanoate. Of these, dextrin palmitate, dextrin myristate, and dextrin palmitate-2-ethylhexanoate are preferred from the viewpoint of improving usability and efficiently gelling the oil to impart an appropriate thickness to the coating film, and those containing at least dextrin palmitate are more preferred.

[0020] Any amino acid-based gelling agent commonly used in cosmetics can be used without restriction. Specifically, dibutyl lauroyl glutamide and dibutyl ethylhexanoyl glutamide are preferred. Examples of these commercially available products include dibutyl lauroyl glutamide (GP-1) and dibutyl ethylhexanoyl glutamide (EB-21) manufactured by Ajinomoto Co., Inc.

[0021] Amino acid-based gelling agents can also be used as a premixed gel diluted and dissolved in a solvent, due to their improved workability and superior ability to gel oils. Specifically, it is preferable to use a premixed gel in which an amino acid-based gelling agent is dissolved in a solvent beforehand. The solvent is not limited as long as it can be gelled by the amino acid-based gelling agent, but from the viewpoint of gelling oil, octyldodecanol, isostearic acid, etc. are preferred. The content of the amino acid-based gelling agent in the premixed gel is preferably 10 to 45% by mass, more preferably 15 to 40% by mass, and even more preferably 20 to 36% by mass, from the viewpoint of improving workability, gelling oil, and suppressing oil separation of the premixed gel itself. As the premix gel, commercially available products such as AJK-OD2046 containing 20% ​​by mass of an amino acid-based gelling agent, and AJK-IS3613 containing 36% by mass of an amino acid-based gelling agent (both manufactured by Higher Alcohol Co., Ltd.) can be used.

[0022] As for component (A), from the viewpoint of improving the feel of use and providing an appropriate thickness to the coating film, a solid wax, an organically modified clay mineral, a dextrin fatty acid ester, and an amino acid-based gelling agent are preferred, and a solid wax, an organically modified clay mineral, and a dextrin fatty acid ester are more preferred.

[0023] Component (A) can be used alone or in combination of two or more types. From the viewpoint of clearly defining the edges of the applied area, the content is preferably 2% by mass or more in the total composition, more preferably 4% by mass or more, and even more preferably 6% by mass or more. From the viewpoint of clearly defining the edges of the applied area and effectively producing a finish with a sense of depth, the content is preferably 30% by mass or less, more preferably 22% by mass or less, and even more preferably 16% by mass or less. Furthermore, the content of component (A) is preferably 2 to 30% by mass in the total composition, more preferably 4 to 22% by mass, and even more preferably 6 to 16% by mass.

[0024] The component (B) used in this invention is a semi-solid oil with a melting point of 30 to 60°C. A melting point of 32 to 57°C is preferred, and a melting point of 33 to 52°C is more preferred. In this invention, the melting point is measured in the same manner as component (A).

[0025] The semi-solid oil in component (B) is not limited to those commonly used in cosmetics, for example, petrolatum (57°C), Japanese wax (60°C), synthetic Japanese wax (53°C), vinyl leather wax (54°C), hexa(behenic acid / benzoic acid / ethylhexanoic acid) dipentaerythrityl (52°C), cholesteryl hydroxystearate (52°C), tetra(hydroxystearate / isostearate) dipentaerythrityl (50°C), hydrogenated palm oil (47°C), hexahydroxystearate dipentaerythrityl (45°C), tri(caprylic / capric acid / myristic acid / stearic acid) glyceryl (40°C), hexa(hydroxystearate) Examples include dipentaerythrityl phosphate / stearic acid / rosinic acid (37°C), phytosteryl oleate (33°C), glyceryl ethylhexanoate / stearic acid / adipate (31°C), di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate (33°C), (phytosteryl / isostearyl / cetyl / stearyl / behenyl) dimer dilinoleate (34°C), bis(behenyl / isostearyl / phytosteryl) dimer dilinoleate (38°C), hard lanolin (49°C), reduced lanolin (45°C), bis-diglyceryl polyacyladipate-2 (39°C), etc. (the melting point is shown in parentheses).

[0026] As for component (B), from the viewpoint of improving the feel of use and quickly smoothing the surface of the coating film after application, petrolatum, dipentaerythrityl hexahydroxystearate, bis-diglyceryl polyacyladipate-2, dimer dilinoleate (phytosteryl / isostearyl / cetyl / stearyl / behenyl), and dilauroyl glutamate (octyldodecyl / phytosteryl / behenyl) are preferred, and dipentaerythrityl hexahydroxystearate, bis-diglyceryl polyacyladipate-2, dimer dilinoleate (phytosteryl / isostearyl / cetyl / stearyl / behenyl), and dilauroyl glutamate (octyldodecyl / phytosteryl / behenyl) are more preferred.

[0027] Component (B) can be used alone or in combination of two or more types. From the viewpoint of clearly defining the edges of the coated area and effectively producing a finish with a sense of depth, the content is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 2% by mass or more in the total composition. From the viewpoint of easily forming a smooth coating film with a certain thickness and easily obtaining a finish with a sense of depth, it is preferably 65% ​​by mass or less, more preferably 45% by mass or less, and even more preferably 20% by mass or less. Furthermore, the content of component (B) is preferably 0.1 to 65% by mass in the total composition, more preferably 0.5 to 45% by mass, and even more preferably 2 to 20% by mass.

[0028] In the present invention, the mass ratio (A) / (B) of component (A) to component (B) is preferably 0.2 or more, more preferably 0.3 or more, even more preferably 0.5 or more, preferably 35 or less, even more preferably 25 or less, and even more preferably 15 or less, from the viewpoint of clearly defining the edges of the applied area and effectively producing a finish with a sense of depth. Furthermore, the mass ratio (A) / (B) of component (A) to component (B) is preferably 0.2 to 35, more preferably 0.3 to 25, and even more preferably 0.5 to 15.

[0029] Component (C) is a non-volatile liquid oil, specifically a non-volatile oil that is liquid at 20°C. "Liquid at 20°C" means that it has fluidity at 20°C, and this includes paste-like substances. Furthermore, "non-volatile" means that when 1g of the oil is spread in a 48mm diameter glass petri dish and left at 25°C and atmospheric pressure for 24 hours, the mass loss rate is 1% or less. The non-volatile liquid oil in component (C) is typically used in cosmetics and includes oils such as hydrocarbon oils, vegetable oils, animal oils, ester oils, higher alcohol oils, silicone oils, and fluorinated oils.

[0030] Specifically, these include linear or branched hydrocarbon oils such as liquid paraffin, liquid isoparaffin, mineral oil, polybutene, polyisobutene, hydrogenated polyisobutene, hydrogenated polydecene, squalane, squalene, and petrolatum; vegetable oils such as avocado oil, macadamia nut oil, olive oil, rapeseed oil, sesame oil, wheat germ oil, linseed oil, cottonseed oil, soybean oil, palm oil, coconut oil, castor oil, jojoba oil, sunflower oil, camellia oil, and corn oil; and animal oils such as liquid lanolin.Isopropyl myristate, octyldodecyl myristate, isopropyl isostearate, isononyl isononanoate, butyl stearate, oleyl oleate, isotridecyl isononanoate, isostearyl myristate, octyldodecyl ricinoleate, octyl hydroxystearate, diglyceryl monoisostearate, ethylhexyl palmitate, cetyl ethylhexanoate, octyl methoxycinnamate, tocopheryl acetate, propylene carbonate, diisostearyl malate, propylene glycol dicaprylate, Neopentyl glycol dicaprate, neopentyl glycol diethylhexanoate, diglyceryl diisostearate, propanediol diisostearate, glyceryl monomyristate monoisostearate, glyceryl diisostearate, glyceryl triisostearate, di(caprate / caprylate)propanediol, tri(caprylate / caprate)glyceryl, glyceryl tri-2-ethylhexanoate, triethylhexanoin, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate Tyrolpropane, pentaerythrityl tetraoctanoate, pentaerythrityl tetraethylhexanoate, pentaerythritol tetraisostearate, polyglyceryl-2 isostearate, polyglyceryl-2 diisostearate, polyglyceryl-2 triisostearate, polyglyceryl-2 tetraisostearate, polyglyceryl-6 octacaprylate, (isostearate / sebacate) ditrimethylolpropane oligoester, dipentaerythrityl tripolyhydroxystearate, dilauroyl glutamate (Phytosteryl / Octyldodecyl), Lauroyl Glutamate Di(Phytosteryl / Behenyl / Octyldodecyl), Trehalose Isostearate Esters, Dipentaerythrityl Tetraisostearate, Dipentaerythrityl Pentaisostearate, Ethylhexyl Hydroxystearate, Phytosterol Fatty Acid Esters, Cholesterol Fatty Acid Esters, Polyglycerin Fatty Acid Esters, Pentaerythritol Fatty Acid Esters, dl-α-Tocopherol, dl-α-Tocopherol Nicotinate, and other ester oils;Examples include higher alcohols such as isostearyl alcohol, octyldodecanol, and decyltetradecanol; silicone oils such as diphenyl dimethicone, dimethylpolysiloxane, methylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, higher alcohol-modified organopolysiloxane, tris(trimethylsiloxy)methylsilane, and trimethylpentaphenyltrisiloxane; and fluorinated oils such as fluoropolyethers and perfluoroalkyl ether silicones.

[0031] Component (C) preferably contains one or more of hydrocarbon oils, ester oils, higher alcohols, and silicone oils, with hydrocarbon oils, ester oils, and higher alcohols being more preferred.

[0032] Component (C) can be used alone or in combination of two or more types. From the viewpoint of easily forming a smooth coating film with a certain thickness and easily obtaining a finish with a sense of depth, the content is preferably 10% by mass or more, more preferably 20% by mass or more, and even more preferably 40% by mass or more in the total composition. From the viewpoint of clearly defining the edges of the coated area and effectively producing a finish with a sense of depth, the content is preferably 97.8% by mass or less, more preferably 92% by mass or less, and even more preferably 87% by mass or less. Furthermore, the content of component (C) is preferably 10 to 97.8% by mass in the total composition, more preferably 20 to 92% by mass, and even more preferably 40 to 87% by mass.

[0033] In the present invention, the mass ratio (A) / (C) of component (A) to component (C) is preferably 0.01 or more, more preferably 0.02 or more, and even more preferably 0.03 or more, from the viewpoint of effectively clarifying the edges of the coated area, and is preferably 0.6 or less, more preferably 0.5 or less, and even more preferably 0.45 or less, from the viewpoint of effectively producing a finish with a sense of depth. Furthermore, the mass ratio (A) / (C) of component (A) to component (C) is preferably 0.01 to 0.6, more preferably 0.02 to 0.5, and even more preferably 0.03 to 0.45.

[0034] In the present invention, the mass ratio of component (A) to the total amount of components (B) and (C), (A) / ((B)+(C)), is preferably 0.015 or more, more preferably 0.025 or more, and even more preferably 0.035 or more, from the viewpoint of effectively clarifying the edges of the coated area. From the viewpoint of effectively achieving a finish with a sense of depth, it is preferably 0.55 or less, more preferably 0.45 or less, and even more preferably 0.4 or less. Furthermore, the mass ratio of component (A) to the total amount of components (B) and (C), (A) / ((B)+(C)), is preferably 0.015 to 0.55, more preferably 0.025 to 0.45, and even more preferably 0.035 to 0.4.

[0035] In the present invention, the mass ratio (B) / (C) of component (B) to component (C) is preferably 0.005 or more, more preferably 0.007 or more, and even more preferably 0.009 or more, from the viewpoint of effectively clarifying the edges of the coated area, and is preferably 2 or less, more preferably 1.75 or less, and even more preferably 1.5 or less, from the viewpoint of effectively producing a finish with a sense of depth. Furthermore, the mass ratio (B) / (C) of component (B) to component (C) is preferably 0.005 to 2, more preferably 0.007 to 1.75, and even more preferably 0.009 to 1.5.

[0036] The component (D) used in the present invention is a low-order titanium oxide coated particle having dichroism in which the appearance color and interference color are different. Having dichroism, where the apparent color and interference color differ, means that the interference color, which is clearly visible in the specular reflection direction of the irradiated light, and the apparent color, which is visible in directions where the interference color is less visible, differ in one or more of the following properties: hue, saturation, and lightness. Angle of incidence: The angle that the incident optical axis makes with respect to the normal to the coated surface of the low-order titanium oxide coated particles. Receiving angle: When the angle between the receiving optical axis and the normal to the coated surface is defined as positive (the side with the same incident angle relative to the normal is positive, and the side opposite the incident angle relative to the normal is negative), Specular reflection direction: For example, when the incident angle is 45°, the receiving angle is in the range of -70° to -20°. Direction in which interference color is difficult to see: For example, when the incident angle is 45°, it is in the range of the light-receiving angle of 20° to 70°. In addition, since the outermost layer of a normal interference pearl pigment is coated with titanium oxide (white without coloring), the appearance color becomes white. In contrast, the low-order titanium oxide-coated particles are coated with low-order titanium oxide, so the appearance color becomes a color different from white (colored other than white).

[0037] The low-order titanium oxide-coated particles of component (D) can effectively show the difference between the appearance color and the interference color, clarify the edge of the coating part, and effectively exhibit a three-dimensional finish from the viewpoint of effectively expressing a three-dimensional finish. It is preferably plate-shaped.

[0038] In addition, as the low-order titanium oxide-coated particles of component (D), those in which plate-shaped particles are coated with low-order titanium oxide are preferable. In plate-shaped particles, the plate shape includes not only the shape of a plate in the narrow sense but also powders having shapes such as flakes. Examples of plate-shaped particles include those used in ordinary cosmetics, such as mica such as mica, synthetic fluorophlogopite, muscovite, phlogopite, biotite, lithia mica; plate-shaped zinc oxide, plate-shaped titanium oxide, plate-shaped cerium oxide, barium sulfate, talc, plate-shaped kaolin, sericite, plate-shaped silica, plate-shaped hydroxyapatite, bentonite, montmorillonite, hectorite, plate-shaped ceramic powder, plate-shaped alumina, plate-shaped boron nitride, plate-shaped polymethyl methacrylate powder, plate-shaped iron oxide, aluminum, plate-shaped glass powder, etc. Among these, synthetic phlogopite is preferable from the viewpoint of less color shading.

[0039] The low-order titanium oxide that coats the plate-shaped particles has a composition represented by TiOx (1.0 < x < 2.0). For example, titanium powder and titanium oxide are mixed and sintered under reduced pressure to obtain a titanium / titanium oxide sintered product. Thus, the low-order titanium oxide-coated particles of component (D) in which low-order titanium oxide is coated on the plate-shaped particles can adjust the color tones of the appearance color and the interference color by adjusting the film thickness of the low-order titanium oxide coating layer.

[0040] Furthermore, the lower titanium oxide coated particles of component (D) are preferably 2 μm or more in average particle size, more preferably 5 μm or more, even more preferably 15 μm or more, preferably 100 μm or less, more preferably 80 μm or less, and even more preferably 50 μm or less, from the viewpoint of clearly defining the edges of the coated area and effectively producing a finish with a sense of depth. In addition, the average particle size of component (D) is preferably 2 to 100 μm, more preferably 5 to 80 μm, and even more preferably 15 to 50 μm. In this invention, the average particle size is measured by the particle size at 50% of the integrated value in the particle size distribution obtained by laser diffraction / scattering. Specifically, it is measured using a laser diffraction / scattering particle size distribution analyzer (for example, LA-920 manufactured by Horiba, Ltd.) with ethanol as the dispersion medium.

[0041] The appearance color and interference color of the lower-order titanium oxide coated particles of component (D) can generally be evaluated using the method for evaluating the appearance color and interference color of pearl pigments, that is, the method for evaluating the appearance color on a white background and the interference color on a black background. Furthermore, it is preferable that the lower-order titanium oxide coated particles of component (D) have an appearance color that is darker than the interference color on a black background, as this effectively creates a sense of three-dimensionality and depth. The brightness of the apparent color and interference color can be expressed by the lightness L* measured using a colorimeter; a higher value indicates a brighter color. By comparing the lightness L* of the apparent color and interference color, it is possible to determine which is brighter (or darker).

[0042] As the lower-order titanium oxide coated particles of component (D), it is preferable to use synthetic fluorphlogopite coated with a (titanium / titanium oxide) sintered product. For example, commercially available products such as SCALES COLOR M020Y-CSM, SCALES COLOR M020R-CSM, SCALES COLOR M020B-CSM, and SCALES COLOR M045R-CSM (all manufactured by Akaho Chemical Co., Ltd.) can be used.

[0043] Component (D) can be used alone or in combination of two or more types. From the viewpoint of clearly defining the edges of the coated area and effectively producing a finish with a sense of depth, the content is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and even more preferably 0.5% by mass or more in the total composition. From the viewpoint of improving coating performance, facilitating the formation of a smooth coating film with a certain thickness, and facilitating the acquisition of a finish with a sense of depth, the content is preferably 30% by mass or less, more preferably 22% by mass or less, and even more preferably 10% by mass or less. Furthermore, the content of component (D) is preferably 0.01 to 30% by mass in the total composition, more preferably 0.1 to 22% by mass, and even more preferably 0.5 to 10% by mass.

[0044] In the present invention, the mass ratio (D) / (C) of component (D) to component (C) is preferably 0.0005 or more, more preferably 0.001 or more, and even more preferably 0.0015 or more, from the viewpoint of clearly defining the edges of the coated area and effectively producing a finish with a sense of depth after the volatile components have evaporated. From the viewpoint of facilitating the formation of a smooth coating film with a certain thickness after the volatile components have evaporated, it is preferably 0.5 or less, more preferably 0.2 or less, and even more preferably 0.15 or less. Furthermore, the mass ratio (D) / (C) of component (D) to component (C) is preferably 0.0005 to 0.5, more preferably 0.001 to 0.2, and even more preferably 0.0015 to 0.15.

[0045] In the present invention, the mass ratio of the total amount of components (A), (B), and (C) to component (D), ((A)+(B)+(C)) / (D), is preferably 0.02 or higher, more preferably 0.025 or higher, and even more preferably 0.03 or higher, from the viewpoint of effectively producing a finish with a sense of depth. From the viewpoint of clearly defining the edges of the applied area and effectively producing a finish with a sense of depth, it is preferably 1000 or lower, more preferably 900 or lower, and even more preferably 800 or lower. Furthermore, the mass ratio of the total amount of components (A), (B), and (C) to component (D), ((A)+(B)+(C)) / (D), is preferably between 0.02 and 1000, more preferably between 0.025 and 900, and even more preferably between 0.03 and 800.

[0046] In addition to the above-mentioned components, the oily cosmetic composition of the present invention may contain components commonly used in cosmetics, such as oily components other than components (B) and (C), powders other than component (D), coloring pigments, surfactants, lower alcohols, polyhydric alcohols, polymer compounds, ultraviolet absorbers, antioxidants, fragrances, antifouling agents, humectants, water, and the like.

[0047] The oily cosmetic composition of the present invention can be manufactured by conventional methods and may be in either a solid or non-solid form. The oily cosmetic composition of the present invention is a cosmetic composition in which an oil is a continuous phase, and can be used as, for example, lip cosmetics such as lipstick, lip balm, lip gloss, and lip liner; or makeup cosmetics such as mascara, eyeliner, eyeshadow, and blush. In particular, it is suitable as a lip cosmetic because it clearly defines the contour of the lips when applied to them. [Examples]

[0048] Reference example (color measurement of pearl pigments) The pearl pigments shown in Table 1 were colorimetrically measured using the following method. The results are shown in Table 1. (Method for measuring the color of pearl pigments) For color measurement, 1.5 mg of each pearl pigment was uniformly applied to 2.5 cm square white and black bioskin samples. Color measurement was performed using a BYK-Gardner BYK-mac i multi-angle colorimeter, measuring L*, a*, and b* at 75° on a white background for the appearance color and -15° on a black background for the interference color. Note that "75° on a white background" refers to the measurement conditions set on the instrument, and in practice, it means measuring the color of the sample applied to the white bioskin at an incident angle of 45° and a receiving angle of 30°. Similarly, "-15° on a black background" refers to the settings on the instrument, and in practice, it means measuring the color of the sample applied to the black bioskin at an incident angle of 45° and a receiving angle of -60°. Color measurement was performed four times for each sample, and the average value was calculated and used for evaluation. This colorimetric value, L*, represents the brightness of a color; a higher number indicates a brighter color. Generally, when evaluating the appearance color and interference color of pearl pigments, a method is used in which the appearance color is evaluated on a white background and the interference color on a black background. From the results in Table 1, it was confirmed that for pearl pigments (1) to (4), the lightness L* of the appearance color was smaller than the lightness L* of the interference color, and the appearance color on a white background was darker than the interference color on a black background.

[0049] [Table 1]

[0050] Examples 1-12, Comparative Examples 1-2 (stick lipstick) A stick lipstick with the composition shown in Table 2 was manufactured, and the clarity of the application area and the depth of the finish after 5 minutes of application were evaluated. The results are also shown in Table 2.

[0051] (Manufacturing method) A total amount of 300g was prepared using a 1L container with a diameter of 130mm and a 30mm diameter disperser blade (rotation speed 2500r / min throughout the entire process). First, the base raw materials (raw materials excluding component (D), powder, and coloring pigment) were heated to 110°C and uniformly mixed for 5 minutes while maintaining the temperature. Next, component (D), powder, and coloring pigment were added and uniformly mixed for a further 2 minutes. After degassing, the mixture was cooled and solidified to room temperature. The required amount was cut from this lipstick bulk, heated and melted to 105°C using a microwave oven, poured into a mold, cooled and solidified, inserted into a container, and removed to obtain a lipstick stick.

[0052] (Evaluation method) (1) Clarity of the applied area 5 minutes after application: Ten expert panelists applied each stick lipstick to their lips and evaluated the clarity of the application area (clarity of the lip contour) after 5 minutes, according to the following criteria. The results are shown as the total score from the ten expert panelists. 5; The edges of the applied area are very clear 5 minutes after application. 4; The edges of the applied area are clearly defined 5 minutes after application. 3; The edges of the applied area are somewhat clearer 5 minutes after application. 2. The edges of the applied area are not very clear 5 minutes after application. 1. The edges of the applied area are not clearly defined 5 minutes after application.

[0053] (2) A finish with depth after 5 minutes of application: Ten expert panelists applied each stick lipstick to their lips and evaluated the depth and finish after 5 minutes using the following criteria. The results are shown as the total score from the ten expert panelists. 5; After 5 minutes of application, it has a very deep, textured finish. 4. After 5 minutes of application, it has a finish with a sense of depth. 3; After 5 minutes of application, the finish has a slightly textured appearance. 2; After 5 minutes of application, the finish does not have much depth. 1. The finish does not have a sense of depth after 5 minutes of application.

[0054] [Table 2]

[0055] Examples 13-14 (Liquid lipstick) Liquid lipsticks with the compositions shown in Table 3 were manufactured. When applied to the lips, all of the resulting liquid lipsticks produced a clear, defined edge after 5 minutes, resulting in a finish with a sense of depth. A cosmetic applicator with a flattened applicator and a bristle-like surface can be used.

[0056] (Manufacturing method) A total amount of 300g was prepared using a 1L container with a diameter of 130mm and a 30mm diameter disperser blade (rotation speed 2500r / min throughout the entire process). First, the base raw materials (raw materials excluding component (D), powder, and coloring pigment) were heated to 110°C and uniformly mixed for 5 minutes while maintaining the temperature. Next, component (D), powder, and coloring pigment were added and uniformly mixed for a further 2 minutes. After degassing, the mixture was cooled and solidified to room temperature. The required amount was cut from this lipstick bulk, heated and melted to 105°C using a microwave oven, poured into a transparent dipping container, and cooled and solidified to obtain liquid lipstick.

[0057] [Table 3]

Claims

1. The following components (A), (B), (C), and (D): (A) Oil gelling agent 2 to 30% by mass, (B) Semi-solid oil with a melting point of 30-60°C, 0.5-65% by mass. (C) Non-volatile liquid oil, (D) Low-order titanium oxide coated particles having dichroism with different appearance and interference colors. An oily lip cosmetic comprising the following: the L* of the low-grade titanium dioxide coated particles of component (D) in the white area is 61.96 to 74.92, and the mass ratio of component (A) to the total amount of components (B) and (C) (A) / ((B) + (C)) is 0.015 to 0.

4.

2. The oily cosmetic composition according to claim 1, wherein the lower titanium dioxide coated particles of component (D) are in the form of plates.

3. The oily cosmetic composition according to claim 1 or 2, wherein the low-grade titanium dioxide coated particles of component (D) have an appearance color on a white background that is darker than the interference color on a black background.

4. The oily cosmetic composition according to any one of claims 1 to 3, wherein the lower titanium dioxide coated particles of component (D) have an average particle size of 2 to 100 μm.

5. An oily cosmetic composition according to any one of claims 1 to 4, wherein the content of lower titanium oxide coated particles in component (D) is 0.01 to 30% by mass.

6. An oily cosmetic composition according to any one of claims 1 to 5, wherein the mass ratio (A) / (C) of component (A) to component (C) is 0.01 to 0.

45.

7. An oily cosmetic composition according to any one of claims 1 to 6, wherein the content of component (C) is 20 to 92% by mass of a non-volatile liquid oil.

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