Oily cosmetic composition and water-in-oil emulsion cosmetic composition

Abstract

Provided are an oily cosmetic composition and a water-in-oil emulsion cosmetic composition in which surface-treated pigment particles contained therein are inhibited from running (that is, oil resistance is excellent) while retaining dispersibility of the pigment particles.　The oily cosmetic composition or the water-in-oil emulsion cosmetic composition includes, as an oil-phase component, (A) surface-treated pigment particles, (B) a silicone-based film-forming agent, and (C) an oil. The surface-treated pigment particles have been surface-treated with an ester of a C8-C20 fatty acid with glycerin, and the oil comprises at least one oil selected from among volatile oils and non-volatile oils.

Description

Oil-based cosmetic composition and water-in-oil emulsion cosmetic composition

[0001] The present invention relates to an oil-based cosmetic composition and a water-in-oil emulsion cosmetic composition.

[0002] To date, many oil-based or water-in-oil emulsion cosmetic compositions containing a film-forming agent have been reported.

[0003] For example, Patent Document 1 discloses a water-in-oil emulsion cosmetic containing the following components (A), (B), (C), and (D): (A) 0.1 to 10 mass% of a non-volatile phenyl-modified silicone, (B) 0.01 to 30 mass% of an ester oil selected from pentaerythritol fatty acid esters and dipentaerythritol fatty acid esters that are liquid at 25°C, (C) 0.01 to 20 mass% of a film-forming agent, and (D) 1 to 20 mass% of a hydrophobically treated color pigment.

[0004] Japanese Patent Application Laid-Open No. 2020-186217

[0005] In cosmetics containing the above-mentioned film-forming agent and surface-treated pigment particles, although the incorporation of the film-forming agent ensures the water resistance of the cosmetics, there is a known problem that the surface-treated pigment particles bleed out from the film-forming agent due to oils such as sebum from the skin, i.e., poor oil resistance.

[0006] Furthermore, in such cosmetics, depending on the type of surface treatment of the pigment particles, the dispersibility in the oil and / or film-forming agent may be poor, which may result in uneven color.

[0007] The present invention aims to improve the above-mentioned circumstances, and its object is to provide an oil-based cosmetic composition and a water-in-oil emulsion cosmetic composition in which the dispersion of the surface-treated pigment particles contained therein is ensured while the bleeding of the pigment particles is suppressed (i.e., excellent oil resistance).

[0008] The present invention that achieves the above object is as follows.

[0009] <Aspect 1> An oil-based cosmetic composition or a water-in-oil emulsion cosmetic composition, comprising, as oil phase components: (A) surface-treated pigment particles, (B) a silicone film-forming agent, and (C) an oil component, wherein the surface-treated pigment particles have been surface-treated with an ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin, and the oil component comprises at least one of a volatile oil and a non-volatile oil. <Aspect 2> The composition according to Aspect 1, wherein the ester compound is at least one selected from the group consisting of diglyceryl tetraisostearate, diglyceryl triisostearate, caprylic / capric triglyceride, glyceryl dilaurate, glyceryl triisostearate, decaglyceryl monoisostearate, and decaglyceryl diisostearate. <Aspect 3> The composition according to Aspect 1 or 2, wherein the content of the silicone film-forming agent is 1.0 to 20 mass%. Aspect 4: The composition according to any one of Aspects 1 to 3, wherein, when the oil component includes the non-volatile oil component, the content ratio of the silicone film-forming agent to the non-volatile oil component (mass of the silicone film-forming agent / mass of the non-volatile oil component) is 0.6 or more. Aspect 5: The composition according to any one of Aspects 1 to 4, wherein the content of the surface-treated pigment particles is 0.5 to 20 mass%. Aspect 6: The composition according to any one of Aspects 1 to 5, wherein the silicone film-forming agent includes trimethylsiloxysilicate. Aspect 7: A cosmetic for eyelashes or eyebrows, comprising the composition according to any one of Aspects 1 to 6. Aspect 8: The cosmetic according to Aspect 7, which is a mascara and wherein the oil component includes a volatile oil component. Aspect 9: The cosmetic according to Aspect 8, wherein the content of the volatile oil component relative to the oil component is 80 mass% or more. Aspect 10: A foundation, comprising the composition according to any one of Aspects 1 to 6.

[0010] According to the present invention, it is possible to provide an oil-based cosmetic composition and a water-in-oil emulsion cosmetic composition that have excellent oil resistance while ensuring the dispersibility of the surface-treated pigment particles that are blended therein.

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the preferred embodiments. However, the present invention is not limited to the following embodiments, and various modifications can be made within the scope of the present invention.

[0012] <<Composition of the Present Invention>> The composition of the present invention is an oil-based cosmetic composition or a water-in-oil emulsion cosmetic composition, which comprises, as oil phase components, (A) surface-treated pigment particles, (B) a silicone-based film-forming agent, and (C) an oil component, wherein the surface-treated pigment particles have been surface-treated with an ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin, and wherein the oil component comprises at least one of a volatile oil component and a non-volatile oil component.

[0013] In the present invention, the oil-based cosmetic composition refers to a cosmetic composition having a single oil phase. However, in the present invention, the oil-based cosmetic composition may contain a small or appropriate amount of water or aqueous components (for example, 5.0% by mass or less, 2.0% by mass or less, 1.0% by mass or less, 0.5% by mass or less, 0.1% by mass or less, 0.01% by mass or less, or 0.001% by mass or less, based on the total mass of the composition).

[0014] In the present invention, the oil phase component refers to a component that constitutes the oil phase, and when the composition of the present invention is a water-in-oil emulsion cosmetic composition, the oil phase component constitutes the external phase.

[0015] The composition of the present invention can suppress bleeding of the surface-treated pigment particles contained therein while ensuring the dispersibility of the pigment particles, i.e., has excellent oil resistance. Without being limited by theory, this is thought to be due to the following reasons.

[0016] When a cosmetic composition containing surface-treated pigment particles, a silicone-based film-forming agent, and an oil is applied to an object (e.g., skin, eyelashes, etc.), after volatilization of volatile components in the composition (e.g., volatile oils, water, etc.), a film of oil phase components formed by the silicone-based film-forming agent is formed on the surface of the object, and the surface-treated pigment particles are thought to be trapped within the film. In this case, in order to improve the dispersibility of the surface-treated pigment particles in the silicone-based film-forming agent, for example, it is conceivable to use pigment particles surface-treated with a silicone-based surface-treating agent that is thought to be compatible with the silicone-based film-forming agent. However, through extensive research by the present inventors, it has been found that while the use of pigment particles surface-treated with a silicone-based surface-treating agent can improve the dispersibility of the pigment particles in the silicone-based film-forming agent, when the coating thus obtained comes into contact with oils such as sebum on the skin, the pigment particles tend to bleed out of the silicone-based film-forming agent.

[0017] As described above, it has not been easy to simultaneously improve the dispersibility of surface-treated pigment particles and suppress bleeding of the surface-treated pigment particles.

[0018] Therefore, through further intensive research by the present inventors, it was found that, rather than simply improving the dispersibility of surface-treated pigment particles in a silicone-based film-forming agent, it is possible to suppress bleeding of the surface-treated pigment particles from the silicone-based film-forming agent by adjusting the dispersibility to an appropriate level. More specifically, by deliberately selecting pigment particles that have been treated with a specific surface treatment agent other than a silicone-based one for the silicone-based film-forming agent, it was possible to suppress bleeding of the pigment particles from the silicone-based film-forming agent while ensuring a certain degree of dispersibility.

[0019] In other words, by using pigment particles treated with a specific surface treatment agent in combination with a silicone-based film-forming agent, the present inventors were able to obtain a composition of the present invention that exhibits excellent oil resistance while ensuring the dispersibility of the surface-treated pigment particles.

[0020] The components of the composition of the present invention are described in detail below.

[0021] (A) Surface-treated pigment particles The composition of the present invention contains surface-treated pigment particles as an oil phase component. The surface-treated pigment particles used in the present invention are surface-treated with an ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin. Here, the ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin is also simply referred to as the "ester compound of the present invention."

[0022] In the composition of the present invention, the content of the surface-treated pigment particles is not particularly limited, and may be, for example, 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, or 5.0% by mass or more, relative to the entire composition, and may be 20% by mass or less, 18% by mass or less, 16% by mass or less, 14% by mass or less, 12% by mass or less, 10% by mass or less, 8.0% by mass or less, or 6.0% by mass or less.

[0023] The ester compound according to the present invention is not particularly limited, and is preferably one that does not color or is unlikely to color the pigment particles that are the subject of surface treatment.

[0024] Specifically, the fatty acid having 8 to 20 carbon atoms in the ester compound according to the present invention may be, for example, a fatty acid having 8 or more, 10 or more, 12 or more, 14 or more, 16 or more, or 18 or more carbon atoms, or a fatty acid having 20 or less, 19 or less, or 18 or less carbon atoms. Of these, fatty acids having 8 to 18 carbon atoms are preferred, and fatty acids having 12 to 18 carbon atoms are more preferred. Furthermore, such fatty acids may be branched or linear.

[0025] Furthermore, the glycerin in the ester compound according to the present invention may be unpolymerized (i.e., a monomer) monoglycerin or polymerized (i.e., a polymer) polyglycerin. When polyglycerin is used, its degree of polymerization is not particularly limited, but is preferably 2 or more and 10 or less. As the glycerin, monoglycerin, which is a monomer, diglycerin having a degree of polymerization of 2, or decaglycerin having a degree of polymerization of 10 is preferred.

[0026] The ester compound according to the present invention may contain, for example, at least one selected from the group consisting of diglyceryl tetraisostearate, diglyceryl triisostearate, diglyceryl diisostearate, diglyceryl monoisostearate, caprylic / capric triglyceride, glyceryl triethylhexanoate, glyceryl dilaurate, glyceryl triisostearate, decaglyceryl monoisostearate, and decaglyceryl diisostearate. Among these, for example, from the viewpoint of improving the lipophilicity of the surface-treated pigment particles and from the viewpoint of being a naturally-derived material, preferred ester compounds according to the present invention are, for example, diglyceryl tetraisostearate, diglyceryl triisostearate, glyceryl dilaurate, glyceryl triisostearate, decaglyceryl monoisostearate, and decaglyceryl diisostearate.

[0027] The method for surface treatment of pigment particles using the ester compound according to the present invention is not particularly limited, and for example, the "Method for producing a powder material for cosmetics" disclosed in WO 2022 / 030462 may be referred to as appropriate.

[0028] In the present invention, any pigment particles can be used for the surface treatment, regardless of their shape (spherical, rod-like, needle-like, plate-like, irregular, scaly, spindle-like, etc.), particle size (aerosol-like, fine particles, pigment-grade, etc.), or particle structure (porous, non-porous, etc.). Examples of pigment particles that can be used for the surface treatment include, but are not limited to, inorganic pigment powders (including natural mineral pigments or synthetic inorganic pigments, etc.), organic dyes, and organic pigment particles.

[0029] More specifically, examples of inorganic pigments include, but are not limited to, titanium oxide, yellow iron oxide, red iron oxide, black iron oxide, talc, zinc oxide, silicon oxide, pearl mica, mica, carbon black, red iron oxide, cerium oxide, manganese violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt titanate, ultramarine, Prussian blue, magnesium oxide, zirconium oxide, kaolin, sericite, muscovite, phlogopite, synthetic mica, lepidolite, biotite, vermiculite, silica, calcium carbonate, magnesium carbonate, magnesium silicate, aluminum silicate, barium silicate, calcium silicate, barium sulfate, calcium sulfate, calcium phosphate, hydroxyapatite, boron nitride, pearl pigments, and bismuth oxychloride.

[0030] Examples of organic dyes include, but are not limited to, Red No. 3, Red No. 10, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 505, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Yellow No. 205, Yellow No. 401, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 205, Orange No. 206, Orange No. 207, Blue No. 1, Blue No. 2, Blue No. 201, Blue 404, Green No. 3, Green No. 201, Green No. 204, and Green No. 205.

[0031] Examples of organic powders include, but are not limited to, tar pigments, nylon powder, cellulose powder, polyethylene powder, polymethyl methacrylate powder, polystyrene powder, acrylic powder, and silicone powder.

[0032] These pigment particles may be used alone or in combination.

[0033] In the present invention, from the viewpoint of use in makeup cosmetics such as foundation, mascara, eye shadow, eyebrow, and blusher, among the above-mentioned examples, the pigment particles may contain at least one selected from the group consisting of titanium oxide, yellow iron oxide, red iron oxide, black iron oxide, talc, zinc oxide, silicon oxide, pearl mica, mica, and sericite.

[0034] <(B) Silicone-Based Film-Forming Agent> The composition of the present invention contains a silicone-based film-forming agent as an oil phase component.

[0035] In the present invention, the term "silicone-based film-forming agent" refers to a film-forming agent containing silicone as the main component, and therefore refers to, for example, a film-forming agent that is a polymer having a silicone moiety in the main chain or a graft polymer containing a silicone moiety. However, it does not intend, for example, a film-forming agent of a polysaccharide in which silicone groups have been introduced only as side chains or terminal groups (such as silicone-modified pullulan).

[0036] Therefore, in the present invention, the silicone-based film-forming agent may include, for example, at least one selected from the group consisting of trimethylsiloxysilicate, fluorine-modified alkyldimethylsiloxysilicate, (trimethylsiloxysilicate / dimethiconol) crosspolymer, (alkyl acrylate / dimethicone) copolymer, and polymethylsilsesquioxane.

[0037] In the composition of the present invention, the content of the silicone-based film-forming agent is not particularly limited, and may be, for example, 1.0 mass% or more, 1.5 mass% or more, 2.0 mass% or more, 2.5 mass% or more, 3.0 mass% or more, 3.5 mass% or more, 4.0 mass% or more, 4.5 mass% or more, or 5.0 mass% or more, relative to the entire composition, and may be 20 mass% or less, 18 mass% or less, 16 mass% or less, 14 mass% or less, 12 mass% or less, 10 mass% or less, 8.0 mass% or less, or 6.0 mass% or less.

[0038] Furthermore, in the composition of the present invention, the content ratio of the silicone film-forming agent to the surface-treated pigment particles (mass of silicone film-forming agent / mass of surface-treated pigment particles) is not particularly limited and may be, for example, 0.5 or more, 0.6 or more, 0.7 or more, 0.8 or more, 0.9 or more, or 1.0 or more, and may be 5.0 or less, 4.5 or less, 4.0 or less, 3.0 or less, 2.0 or less, or 1.0 or less.

[0039] Furthermore, in the composition of the present invention, the content of the silicone film-forming agent relative to 100 parts by mass of the oil phase component may be, for example, 2.0 parts by mass or more, 3.0 parts by mass or more, 4.0 parts by mass or more, or 5.0 parts by mass or more, and may be 20 parts by mass or less, 15 parts by mass or less, 10 parts by mass or less, or 8.0 parts by mass or less.

[0040] Furthermore, in the composition of the present invention, the content of the silicone film-forming agent relative to 100 parts by mass of the oil phase components after excluding volatile components may be, for example, 5.0 parts by mass or more, 8.0 parts by mass or more, 10 parts by mass or more, 11 parts by mass or more, 12 parts by mass or more, 13 parts by mass or more, 14 parts by mass or more, 15 parts by mass or more, 16 parts by mass or more, 17 parts by mass or more, 18 parts by mass or more, 19 parts by mass or more, 20 parts by mass or more, or 21 parts by mass or more, and may be 30 parts by mass or less, 25 parts by mass or less, or 22 parts by mass or less. Here, volatile components refer to, for example, volatile oils, water, etc., when these components are included.

[0041] According to one embodiment of the present invention, the silicone-based film-forming agent preferably comprises trimethylsiloxysilicate.

[0042] In the present invention, the weight-average molecular weight of trimethylsiloxysilicate is not particularly limited, and may be, for example, 5,000 or more, 7,000 or more, or 10,000 or more, or 50,000 or less. For example, from the viewpoint of imparting a longer-lasting cosmetic effect to eyelashes and eyeliners, trimethylsiloxysilicate having a weight-average molecular weight of 5,000 or more is preferred. The weight-average molecular weight is a polystyrene-equivalent value measured by gel permeation chromatography (GPC).

[0043] The trimethylsiloxysilicate may be one produced by a known method, or a commercially available product.

[0044] <Oil> The composition of the present invention contains an oil as an oil phase component.

[0045] In the present invention, the term "oil" refers to an oily medium, but does not include functional oil phase components such as film-forming agents, gelling agents, and surfactants.

[0046] In the composition of the present invention, the content of oil is not particularly limited, and may be, for example, 30% by mass or more, 35% by mass or more, 40% by mass or more, 45% by mass or more, 50% by mass or more, 55% by mass or more, 60% by mass or more, 65% by mass or more, 70% by mass or more, or 75% by mass or more, relative to the entire composition, and may be 80% by mass or less, 75% by mass or less, 70% by mass or less, 65% by mass or less, 60% by mass or less, or 55% by mass or less.

[0047] In the present invention, the oil may comprise at least one of a volatile oil and a non-volatile oil. Of course, in the composition of the present invention, the oil may comprise only a volatile oil, only a non-volatile oil, or a mixture of a volatile oil and a non-volatile oil.

[0048] In the present invention, "volatile" oil means oil having a boiling point of 260°C or less at normal pressure (1 atmosphere). Correspondingly, in the present invention, "non-volatile" oil means oil having a boiling point of more than 260°C at normal pressure (1 atmosphere).

[0049] In the present invention, the volatile oil is not particularly limited, and examples thereof include, but are not limited to, volatile hydrocarbon oils and volatile silicone oils.

[0050] In the present invention, examples of volatile hydrocarbon oils include, but are not limited to, decane, dodecane, isododecane, isohexadecane, undecane, tridecane, alkanes having 9 to 12 carbon atoms, hydrogenated polyisobutene (also known as "light isoparaffin", boiling point: approximately 171°C to 193°C), and mixtures of two or more thereof.

[0051] In the present invention, examples of volatile silicone oils include volatile cyclic silicone oils and volatile linear silicone oils. Examples of volatile cyclic silicone oils include, but are not limited to, dodecamethylcyclohexasiloxane, decamethylcyclopentasiloxane, and octamethylcyclotetrasiloxane. Examples of volatile linear silicone oils include, but are not limited to, low-molecular-weight linear dimethicone (0.65 cs, 1 cs, 1.5 cs, and 2 cs), low-molecular-weight branched silicone methyltrimethicone (TMF-1.5, etc.), and low-molecular-weight alkyl-modified silicones.

[0052] In the present invention, the non-volatile oil may be, for example, an oil having a kinematic viscosity of 10 mPa·s or more, 15 mPa·s or more, 50 mPa·s or more, 100 mPa·s or more, 200 mPa·s or more, 300 mPa·s or more, 400 mPa·s or more, 500 mPa·s or more, or 1000 mPa·s or more, or an oil having a kinematic viscosity of 50,000 mPa·s or less, 40,000 mPa·s or less, 30,000 mPa·s or less, 20,000 mPa·s or less, 10,000 mPa·s or less, 5000 mPa·s or less, 1000 mPa·s or less, or 500 mPa·s or less. The kinematic viscosity can be measured in accordance with JIS K2283.

[0053] In the present invention, the non-volatile oil is not particularly limited, and examples thereof include non-volatile hydrocarbon oils, non-volatile silicone oils, polar oils, solid oils, and semi-solid oils.

[0054] In the present invention, examples of non-volatile hydrocarbon oils include, but are not limited to, hydrogenated polydecene, squalane, hydrogenated polybutene, mineral oil, and mixtures of two or more thereof.

[0055] In the present invention, examples of non-volatile silicone oils include, but are not limited to, non-volatile dimethicone, caprylyl methicone, and diphenylsiloxyphenyl trimethicone.

[0056] In the present invention, "polar oil" refers to an oil other than silicone oil that is highly polar among oils that can be used in cosmetics, and refers to, for example, an oil having an IOB value of 0.10 or more, 0.11 or more, 0.12 or more, or 0.13 or more. The IOB value of the polar oil according to the present invention may be 0.50 or less, 0.45 or less, or 0.40 or less. The IOB value is an abbreviation for Inorganic / Organic Balance (inorganic / organic ratio), and is a value that represents the ratio of the inorganic value to the organic value, and serves as an index of the degree of polarity of an organic compound. Specifically, the IOB value is expressed as IOB value = inorganic value / organic value. The "inorganic value" and "organic value" are set according to the type of atom or functional group, such as 20 for one carbon atom in a molecule and 100 for one hydroxyl group. The IOB value of an organic compound can be calculated by integrating the "inorganic values" and "organic values" of all atoms and functional groups in the organic compound (see, for example, "Organic Conceptual Diagram - Fundamentals and Applications" by Yoshio Koda, pp. 11-17, Sankyo Publishing, 1984).

[0057] Specific examples of ester oils that can be used as polar oils in the present invention include isodecyl neopentanoate, tripropylene glycol dineopentanoate, isononyl isononanoate, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, cetyl ethylhexanoate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid esters, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, and trimethylolpropane triisostearate. Pan, pentaerythrityl tetra-2-ethylhexanoate, triethylhexanoin (glycerin tri-2-ethylhexanoate), glycerin trioctanoate, glycerin triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glycerin trimyristate, tri-2-heptylundecanoic acid glyceride, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceride , 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, and triethyl citrate.

[0058] Specific examples of UV absorbers that can be used as polar oils include, but are not limited to, benzoic acid derivatives, salicylic acid derivatives, cinnamic acid derivatives, dibenzoylmethane derivatives, β,β-diphenylacrylate derivatives, benzophenone derivatives, benzylidene camphor derivatives, phenylbenzimidazole derivatives, triazine derivatives, phenylbenzotriazole derivatives, anthranil derivatives, imidazoline derivatives, benzalmalonate derivatives, 4,4-diarylbutadiene derivatives, etc. Among these, for example, those having a relatively large molecular weight, which are difficult to absorb subcutaneously, or low-irritation types are preferably used.

[0059] In the present invention, the term "solid oil" refers to a substance that is solid at room temperature and pressure and has a melting point. Examples of solid oils include solid fats such as cacao butter, coconut oil, horse oil, hardened coconut oil, palm oil, beef tallow, mutton tallow, and hardened castor oil, higher fatty acids such as myristic acid, palmitic acid, stearic acid, and behenic acid, and higher alcohols such as cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, and cetostearyl alcohol, but are not limited to these.

[0060] Examples of semi-solid oils include, but are not limited to, petrolatum, lanolin, shea butter, vegetable oils such as partially hydrogenated coconut oil, partially hydrogenated jojoba oil, bisdiglyceryl polyacyladipate-2, pentaerythrityl tetra(behenate / benzoate / ethylhexanoate), macadamia nut oil polyglyceryl-6-esters behenate, phytosteryl / behenyl dimer dilinoleate, and dipentaerythritol hexaoxystearate.

[0061] In the composition of the present invention, when the oil component contains a non-volatile oil, the content ratio of the silicone film-forming agent to the non-volatile oil (mass of silicone film-forming agent / mass of non-volatile oil) is not particularly limited and may be, for example, 0.6 or more, 0.7 or more, 0.8 or more, 0.9 or more, or 1.0 or more. Here, since the composition of the present invention does not need to contain a non-volatile oil, there is no particular upper limit to the value of this content ratio.

[0062] In the present invention, whether or not the oil component contains a volatile oil may be appropriately adjusted based on the purpose and use of the composition. For example, when the composition of the present invention is used in a cosmetic for eyelashes or eyebrows, particularly when the composition of the present invention is used in a mascara, the oil component preferably contains a volatile oil. In this case, the content of the volatile oil component relative to the oil component may be, for example, 80% by mass or more, 85% by mass or more, 90% by mass or more, 95% by mass or more, 99% by mass or more, or 100% by mass (i.e., the oil component is composed solely of volatile oil). Furthermore, in this case, the content of the volatile oil component relative to the oil component may be, for example, 100% by mass or less, 99% by mass or less, 98% by mass or less, or 95% by mass or less.

[0063] <Other Components> The composition of the present invention may further contain other components in addition to those described above. The other components may be appropriately selected based on the purpose and use of the composition of the present invention. Below, other components that may be contained in the composition of the present invention will be described as examples, but the composition of the present invention is not limited to these other components.

[0064] (Water) The composition of the present invention may further comprise water. In particular, when the composition of the present invention is a water-in-oil emulsion cosmetic composition, water constitutes the internal phase.

[0065] The water is not particularly limited and may be, for example, water used in cosmetics and quasi-drugs, such as ion-exchanged water, distilled water, ultrapure water, and tap water.

[0066] In the composition of the present invention, the content of water is not particularly limited and may be appropriately adjusted according to the purpose and use.For example, the content of water may be 0.1 mass% or more, 0.5 mass% or more, 1.0 mass% or more, 5.0 mass% or more, 10 mass% or more, 15 mass% or more, 20 mass% or more, 25 mass% or more, or 30 mass% or more, or 30 mass% or less, 25 mass% or less, 20 mass% or less, 15 mass% or less, 10 mass% or less, or 5.0 mass% or less, based on the total mass of the composition.

[0067] <Thickener> The composition of the present invention may further comprise a thickener.

[0068] The thickener is not particularly limited, and examples thereof include dextrin fatty acid esters, organically modified clay minerals, plant-derived polymers, microbial-derived polymers, natural water-soluble polymers, semi-synthetic water-soluble polymers, and synthetic water-soluble polymers.

[0069] The dextrin fatty acid ester may be, for example, an ester compound of a fatty acid having 8 to 24 carbon atoms and dextrin having an average degree of polymerization of 10 to 50. More specifically, examples of the dextrin fatty acid ester include, but are not limited to, dextrin palmitate, dextrin stearate, dextrin palmitate stearate, dextrin isostearate, and dextrin (palmitate / 2-ethylhexanoate).

[0070] Organically modified clay minerals are obtained by treating clay minerals such as natural or synthetic montmorillonites (commercially available products include Veegum, Kunipia, and Laponite) and synthetic micas known as sodium silicic mica and sodium or lithium taeniolite with a quaternary ammonium salt-type cationic surfactant. More specifically, organically modified clay minerals include, but are not limited to, disteardimonium hectorite, dimethylalkylammonium hectorite, and magnesium aluminum silicate treated with distearyldimethylammonium chloride.

[0071] Examples of plant-derived polymers include, but are not limited to, gum arabic, gum tragacanth, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, agar, starch, and glycyrrhizic acid.

[0072] Examples of microbial polymers include, but are not limited to, xanthan gum, dextran, succinoglucan, pullulan, and the like.

[0073] Examples of natural water-soluble polymers include, but are not limited to, collagen, casein, albumin, gelatin, and the like.

[0074] Examples of semi-synthetic water-soluble polymers include, but are not limited to, starch-based polymers, cellulose-based polymers, and alginic acid-based polymers.

[0075] Examples of synthetic water-soluble polymers include, but are not limited to, vinyl polymers, polyoxyethylene polymers, polyoxyethylene-polyoxypropylene copolymer polymers, acrylic polymers, polyethyleneimine, cationic polymers, and the like.

[0076] When a thickener is contained in the composition of the present invention, the content thereof is not particularly limited and may be, for example, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 5.0% by mass or more, 10% by mass or more, or 15% by mass or more, relative to the entire composition, and may be 30% by mass or less, 25% by mass or less, 20% by mass or less, or 15% by mass or less.

[0077] <Surfactant> The composition of the present invention may further comprise a surfactant.

[0078] The surfactant is not particularly limited, and for example, cationic surfactants, anionic surfactants, nonionic surfactants, amphoteric surfactants, etc. may be used as appropriate.

[0079] The surfactant component functions as an emulsifier or gelling agent, improving the stability of the water-in-oil type. For example, an emulsifying surfactant is PEG-10 dimethicone. Another surfactant is polyoxyethylene (POE) hydrogenated castor oil.

[0080] More specifically, examples of polyoxyethylene (POE) hydrogenated castor oils include PEG-5 hydrogenated castor oil triisostearate, PEG-10 hydrogenated castor oil triisostearate, PEG-20 hydrogenated castor oil triisostearate, PEG-30 hydrogenated castor oil triisostearate, PEG-40 hydrogenated castor oil triisostearate, and PEG-60 hydrogenated castor oil triisostearate, but are not limited to these.

[0081] When the composition of the present invention contains a surfactant, its content is not particularly limited and may be, for example, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 2.0% by mass or more, 3.0% by mass or more, or 4.0% by mass or more, relative to the entire composition, and may be 15% by mass or less, 10% by mass or more, or 5.0% by mass or more.

[0082] <Moisturizing Agent> The composition of the present invention may further comprise a moisturizing agent.

[0083] The moisturizing agent is not particularly limited and may be any of those commonly used in cosmetics, etc. Examples of moisturizing agents include, but are not limited to, sucrose, sorbitol, glycerin, 1,3-butylene glycol, propylene glycol, and dipropylene glycol.

[0084] When a humectant is contained in the composition of the present invention, the content thereof is not particularly limited and may be, for example, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, or 1.0% by mass or more, and may be 15% by mass or less, 10% by mass or less, 5.0% by mass or less, 4.5% by mass or less, 4.0% by mass or less, 3.5% by mass or less, 3.0% by mass or less, 2.5% by mass or less, 2.0% by mass or less, 1.5% by mass or less, or 1.0% by mass or less, relative to the entire composition.

[0085] <Other Optional Components> In addition to the above, other optional components commonly used in cosmetics, such as waxes, preservatives, other thickeners, sequestering agents, powder components, pH adjusters, ultraviolet absorbers, skin nutrients, vitamins, antioxidants, antioxidant aids, fragrances, etc., may be appropriately blended as needed within the scope that does not impair the effects of the present invention.

[0086] The composition of the present invention can be produced by a conventional method.

[0087] <Dosage Form> Examples of dosage forms of the composition of the present invention include, but are not limited to, solid, semi-solid, solid paste, stick, emulsion, liquid, gel, sherbet, cream, ointment, and paste.

[0088] <Uses> The composition of the present invention may be used as a cosmetic or as a raw material for a cosmetic. Furthermore, a cosmetic made from the composition of the present invention or a cosmetic containing the composition of the present invention can be suitably used, for example, in a makeup cosmetic. Here, makeup cosmetics are not particularly limited, and examples thereof include, but are not limited to, eyelash cosmetics (e.g., mascara, mascara base, mascara overcoat, etc.), eyebrow cosmetics (e.g., eyebrow cream, eyebrow mascara, etc.), foundation, and blush.

[0089] Therefore, according to one embodiment of the present invention, there is provided a cosmetic for eyelashes or eyebrows containing the composition of the present invention. Also, according to another embodiment of the present invention, there is provided a foundation containing the composition of the present invention.

[0090] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these. Unless otherwise specified, the blending amounts in the tables are expressed in mass %.

[0091] Examples 1 to 6 and Comparative Examples 1 to 4 Oil-based cosmetic compositions of Examples 1 to 6 and Comparative Examples 1 to 4 were prepared based on the formulations in Table 1. For each of the prepared compositions, oil resistance and dispersibility of pigment particles were evaluated according to the following criteria, and the results are shown in Table 1.

[0092] <Evaluation of Oil Resistance> The compositions obtained in the Examples and Comparative Examples were evaluated using the following tapping test. The evaluation criteria are as follows: "Tapping test" A sample was placed on a white artificial leather (4 cm ２ ) at 4 mg / cm ２ The artificial leather is then bent with the coated surface facing inward and left at room temperature for 60 minutes. The coated surface is then attached to a tapping tester with the coated surface facing outward, and the test piece is tapped 30 times against a filter paper soaked in olive oil (N=3). The secondary adhesion-free effect was visually evaluated based on the degree of adhesion of the sample to the filter paper after tapping. "Evaluation criteria" A: Almost no adhesion is observed; B: Slight adhesion is observed, but at a satisfactory level; C: Unacceptable adhesion is observed.

[0093] <Evaluation of Dispersibility of Pigment Particles> The dispersibility of black iron oxide was evaluated by the following method using the black iron oxide and hydrogenated polyisobutene described in the Examples and Comparative Examples. The evaluation criteria are as follows: "Pigment Dispersibility Evaluation Test" 300 g of hydrogenated polyisobutene and 50 g of surface-treated or untreated black iron oxide were mixed in a homomixer at room temperature (5,000 rpm for 5 minutes), and the resulting dispersion was evaluated visually. A: A uniform dispersion without agglomerates was obtained. B: A dispersion containing small agglomerates was obtained. C: A dispersion containing large agglomerates was obtained.

[0094]

[0095] As is clear from Table 1, it was found that all of the compositions of Examples 1 to 6 had good dispersibility of pigment particles and excellent oil resistance.

[0096] In contrast, the compositions of Comparative Examples 1 and 4 had good dispersibility of pigment particles, but were found to have poor oil resistance.

[0097] Furthermore, the compositions of Comparative Examples 2 and 3 were found to have good oil resistance but poor pigment particle dispersibility.

[0098] Examples 7 to 14 Oil-based cosmetic compositions of Examples 7 to 14 were prepared based on the formulations in Table 2, and the oil resistance and dispersibility of pigment particles were evaluated in the same manner as above. The evaluation results are shown in Table 2.

[0099]

[0100] As is clear from the results in Table 2, it was found that all of the compositions of Examples 7 to 14 had good dispersibility of pigment particles and excellent oil resistance.

Claims

1. An oil-based cosmetic composition or a water-in-oil emulsion cosmetic composition, comprising, as an oil phase component: (A) surface-treated pigment particles, (B) a silicone film-forming agent, and (C) an oil component, wherein the surface-treated pigment particles are surface-treated with an ester compound of a fatty acid having 8 to 20 carbon atoms and glycerin, and the oil component contains at least one of a volatile oil component and a non-volatile oil component.

2. The composition according to claim 1, wherein the ester compound is at least one selected from the group consisting of diglyceryl tetraisostearate, diglyceryl triisostearate, glyceryl tri (caprylate / caprate), diglyceryl dilaurate, glyceryl triisostearate, decaglyceryl monoisostearate, and decaglyceryl diisostearate.

3. The composition according to claim 1 or 2, wherein the content of the silicone film-forming agent is 1.0 to 20% by mass.

4. The composition according to any one of claims 1 to 3, wherein when the oil component contains the non-volatile oil component, the content ratio of the silicone film-forming agent to the non-volatile oil component (mass of the silicone film-forming agent / mass of the non-volatile oil component) is 0.6 or more.

5. The composition according to any one of claims 1 to 4, wherein the content of the surface-treated pigment particles is 0.5 to 20% by mass.

6. The composition according to any one of claims 1 to 5, wherein the silicone film-forming agent contains trimethylsiloxysilicic acid.

7. A cosmetic for eyelashes or eyebrows, comprising the composition according to any one of claims 1 to 6.

8. The cosmetic according to claim 7, which is mascara and wherein the oil component contains a volatile oil component.

9. The cosmetic according to claim 8, wherein the content of the volatile oil component is 80% by mass or more with respect to the oil component.

10. A foundation, comprising the composition according to any one of claims 1 to 6.

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