JP7646341B2 - Oil-based cosmetics - Google Patents

Description

The present invention relates to an oil-based cosmetic preparation.

2. Description of the Related Art Conventionally, oil-based cosmetics such as lipstick are required to have a long-lasting effect and to prevent secondary adhesion (color transfer) due to physical rubbing, and various studies have been conducted to address this issue.
For example, Patent Literature 1 describes that a paste-like lip cosmetic containing trimethylsiloxysilicate, a volatile hydrocarbon oil, a dextrin fatty acid ester, and a microcrystalline wax has a cosmetic durability, an effect of preventing secondary adhesion (color transfer), and is excellent in feel when used.

JP 2015-101550 A

However, in cosmetics that contain silicone resins such as trimethylsiloxysilicate as a film-forming agent, if the proportion of volatile oil is increased to reduce the viscosity of the cosmetic and achieve spreadability and a smooth feel, there is an issue that it takes time for the volatile oil to evaporate and for the color transfer prevention effect to be realized. In addition, if the proportion of volatile oil in the cosmetic is high, there is also an issue that less of the ingredients remain on the skin after evaporation, resulting in a dry feeling.

The inventors have discovered that by combining a specific liquid ester compound with a silicone resin such as trimethylsiloxysilicate and a volatile oil, not only is it possible to reduce the viscosity of the cosmetic even with a small proportion of volatile oil, but also that as the volatile oil evaporates, the viscosity increases rapidly, providing a sense of adhesion in a short period of time, without a feeling of dryness, and providing excellent usability and anti-transfer properties.

The present invention comprises the following components (A), (B) and (C):
(A) a liquid ester compound having an isostearyl group and a structure represented by general formula (1),

(In the formula, ^R1 and ^R2 each represent a branched hydrocarbon group having 7 carbon atoms and may be the same or different.)
(B) a silicone resin,
(C) Volatile oil: 1 to 30% by mass
The present invention relates to an oil-based cosmetic composition comprising the above-mentioned compound.

The oil-based cosmetic of the present invention is light to the touch, non-sticky, adheres to the skin in a short time, does not feel dry, and is excellent in both usability and color transfer prevention.

The liquid ester compound of component (A) used in this embodiment is a liquid ester compound having an isostearyl group having a structure represented by the above general formula (1). Component (A) is preferably liquid at 20°C, and more preferably liquid at 0°C or lower. Here, liquid refers to the properties of a liquid, such as fluidity, and includes a paste-like state.

Specific examples of component (A) include diglyceryl monoisostearate, diglyceryl diisostearate, glyceryl diisostearate, glyceryl triisostearate, diglyceryl triisostearate, diglyceryl tetraisostearate, dipentaerythrityl pentaisostearate, pentaerythrityl tetraisostearate, dipentaerythrityl tetraisostearate, dipentaerythrityl triisostearate, and diisostearyl malate.
As component (A), for example, commercially available products such as Salacos 3318, Cosmol 43N, Salacos DP-518N, and Cosmol 222 (all manufactured by Nisshin Oillio Group Ltd.) can be used.

The viscosity of component (A) at 20°C is preferably 2500 mPa·s or more, more preferably 5500 mPa·s or more, and even more preferably 10000 mPa·s or more, from the viewpoint of improving the color transfer prevention effect, and is preferably 1000000 mPa·s or less, more preferably 850000 mPa·s or less, and even more preferably 700000 mPa·s or less, from the viewpoint of suppressing stickiness. The viscosity of component (A) at 20°C is preferably 2500 to 1000000 mPa·s, more preferably 5500 to 850000 mPa·s, and even more preferably 10000 to 700000 mPa·s.
The viscosity is measured in an environment of 20° C. using a rotational viscometer, specifically a B-type viscometer.

One or more types of component (A) can be used, and the content is preferably 3% by mass or more in the total composition, more preferably 5% by mass or more, and even more preferably 8% by mass or more, from the viewpoint of improving the color transfer prevention effect, and is preferably 60% by mass or less, more preferably 50% by mass or less, and even more preferably 40% by mass or less, from the viewpoint of suppressing stickiness. The content of component (A) is preferably 3 to 60% by mass in the total composition, more preferably 5 to 50% by mass, and even more preferably 8 to 40% by mass.

As the silicone resin of component (B), any silicone resin that is used in ordinary cosmetics can be used, and those that are solid at 25°C are preferable, and those that are solid at 40°C or lower are more preferable.
Examples of the silicone resin of component (B) include fluorine-modified silicone resins such as trimethylsiloxysilicate, polymethylsilsesquioxane, polypropylsilsesquioxane, and trifluoroalkyldimethyltrimethylsiloxysilicate.

Of the components (B), component (B-1) trimethylsiloxysilicate is not limited as long as it is a compound that is commonly used in cosmetics and has a crosslinked structure with a siloxane structure as the main skeleton, and is preferably represented by general formula (2).
[(CH ₃ ) ₃ SiO _1/2 ] _a [SiO ₂ ] _b (2)
(In the formula, a is 1 to 3, and b is 0.5 to 8).
The component (B-1) trimethylsiloxysilicate is preferably solid at 25°C, and from the viewpoint of compatibility, it can also be used in the state of a solution diluted with a solvent, or in the state of a dispersion dispersed therein, or in the state of a solution or dispersion obtained by mixing in advance. The solvent for dilution or dispersion is preferably one or more selected from dimethylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and isododecane, and more preferably volatile dimethylpolysiloxane, decamethylcyclopentasiloxane, and isododecane. In this specification, volatile refers to a substance having a flash point of 35°C or more and less than 100°C. Non-volatile refers to a substance having a flash point of 100°C or more. The flash point is measured with a closed cup flash point tester.

As commercially available products of component (B-1), those dissolved in advance in a solvent, for example, KF-7312J (50% solids decamethylcyclopentasiloxane solution), KF-9021 (50% solids decamethylcyclopentasiloxane solution), X-21-5249 (50% solids decamethylcyclopentasiloxane solution), X-21-5595 (60% solids isododecane solution) (all manufactured by Shin-Etsu Chemical Co., Ltd.), SS4267 (35% solids dimethylpolysiloxane solution), SR1000 (100% solids) (all manufactured by Momentive Performance Materials Japan), BY11-018 (30% solids cyclopentasiloxane solution) (manufactured by Toray Dow Corning Silicone Co., Ltd.), BELSIL TMS 803 (manufactured by Wacker Chemie AG), etc. can be used.

Of the components (B), the component (B-2) fluorine-modified silicone resin is preferably one having a structure represented by general formula (3).
R ¹ _a SiO _(4-a)/2 (3)
(wherein R ¹ is a hydrocarbon group having 1 to 8 carbon atoms, a phenyl group, a hydroxyl group, or a functional group having the general formula -R ² -Rf (R ² is a divalent alkylene group having 2 to 6 carbon atoms, and Rf is a perfluoroalkyl group having 1 to 8 carbon atoms), and is arbitrarily selected from a hydroxyl group and a functional group having the general formula -R ² -Rf as an essential component; a is an average number and is within the range of 1.0≦a≦1.8.)
The fluorine-modified silicone resin may have a silanol group in the molecule in order to obtain a finish with good color development, and the proportion of OH groups in the silanol group is preferably 0.1 to 5 mass %, more preferably 0.5 to 5 mass %, based on the mass of the resin.

The fluorine-modified silicone resin (B-2) is preferably solid at 25°C, and from the viewpoint of compatibility, it may be used in the form of a solution diluted with a solvent, or in the form of a dispersion obtained by dispersing in advance, or in the form of a solution or dispersion obtained by mixing in advance. Preferred solvents for dilution or dispersion include cyclic silicones, dimethylpolysiloxane, isododecane, etc. Preferred cyclic silicones are one or more selected from octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5).
As such a fluorine-modified silicone resin, commercially available products such as XS66-B8226, XS66-C1191, and XS66-B8636 (all manufactured by Momentive Performance Materials, Inc.), which have the INCI name "Trifluoropropyldimethyl/Trimethylsiloxysilicate", can be used.

One or more types of silicone resins may be used as component (B), and the content is preferably 3% by mass or more in the total composition, more preferably 5% by mass or more, and even more preferably 8% by mass or more, from the viewpoint of improving the color transfer prevention effect, and is preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less, from the viewpoint of suppressing stickiness. The content of component (B) is preferably 3 to 50% by mass in the total composition, more preferably 5 to 40% by mass, and even more preferably 8 to 30% by mass.

Examples of the volatile oil of component (C) include volatile silicone oils and volatile hydrocarbon oils.
Examples of volatile silicone oils include linear dimethylpolysiloxanes such as dimethylpolysiloxane (1cs), dimethylpolysiloxane (1.5cs), and dimethylpolysiloxane (2cs); branched siloxanes such as methyltrimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane; and cyclic dimethylsiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.

Examples of volatile hydrocarbon oils include paraffinic hydrocarbon oils such as n-decane, n-undecane, and n-dodecane; isoparaffinic hydrocarbon oils such as isodecane, isododecane, and hydrogenated polyisobutene; and cyclic paraffinic hydrocarbon oils such as cyclodecane and cyclododecane. Of these, hydrocarbon oils with 8 to 16 carbon atoms are preferred, hydrocarbon oils with 10 to 16 carbon atoms are more preferred, and hydrocarbon oils with 12 carbon atoms are even more preferred.

The volatile oil of component (C) preferably contains a volatile hydrocarbon oil, and more preferably contains an isoparaffinic hydrocarbon oil, in order to obtain a finish with good color development. One or more types of component (C) can be used.

The liquid ester compound of component (A) can dissolve the silicone resin of component (B) relatively easily, and due to the multi-branched structure of the isostearyl group of general formula (1), the viscosity of the cosmetic can be significantly reduced by adding a relatively small amount of the volatile oil of component (C). On the other hand, due to the multi-branched structure of the isostearyl group of general formula (1), component (A) is likely to rapidly increase the viscosity of the cosmetic as component (C) evaporates. Based on the above new findings obtained as a result of intensive research, the present inventor set the content of component (C) in the cosmetic as follows. That is, the content of component (C) in the total composition is 1% by mass or more, preferably 2% by mass or more, and more preferably 3% by mass or more, from the viewpoint of imparting a light wearing feel, and is 30% by mass or less, preferably 25% by mass or less, and more preferably 20% by mass or less, from the viewpoint of exerting a color transfer prevention effect in a short time. Additionally, the content of component (C) in the total composition is preferably 1 to 30 mass%, more preferably 2 to 25 mass%, and even more preferably 3 to 20 mass%.

In this embodiment, the total mass ratio of components (A) and (B) to component (C), ((A)+(B))/(C), is preferably 1.5 or more, more preferably 1.8 or more, and even more preferably 2 or more, from the viewpoint of obtaining a sense of adhesion in a short time, and is preferably 30 or less, more preferably 20 or less, and even more preferably 15 or less, from the viewpoint of improving application properties. In addition, the total mass ratio of components (A) and (B) to component (C), ((A)+(B))/(C), is preferably 1.5 to 30, more preferably 1.8 to 20, and even more preferably 2 to 15.

The oil-based cosmetic preparation of the present embodiment may further contain (D) a colorant.
The colorant of component (D) is not limited as long as it is one that is commonly used in cosmetics, and examples of the colorant that can be used include color pigments, oil-soluble dyes, and luster pigments.
Examples of color pigments include metal oxides such as titanium oxide, zinc oxide, yellow iron oxide, red iron oxide, black iron oxide, Prussian blue, ultramarine, chromium oxide, and chromium hydroxide; metal complexes such as manganese violet and cobalt titanate; inorganic pigments such as carbon black; synthetic organic pigments such as Red No. 3, Red No. 104, 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, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue 404; and natural organic pigments such as β-carotene, caramel, and paprika pigments.
Examples of oil-soluble dyes include Red No. 218, Red No. 223, Orange No. 201, and the like.

Luster pigments that can be used include plate-like powders such as mica, synthetic phlogopite, glass, silica, alumina, and talc, the surface of which is coated with colorants such as titanium oxide, iron oxide, silicon oxide, iron blue, chromium oxide, tin oxide, chromium hydroxide, gold, silver, carmine, and organic pigments, as well as film rolls cut into any shape such as polyethylene terephthalate-polymethyl methacrylate laminated powder, polyethylene terephthalate-aluminum vapor-deposited powder, and polyethylene terephthalate-gold vapor-deposited laminated powder.

These colorants can be used as they are, or can be used after being subjected to a hydrophobic treatment.
The hydrophobization treatment is not limited as long as it is a treatment that is applied to ordinary cosmetic powders, and examples thereof include silicone treatment using dimethylpolysiloxane, methylhydrogenpolysiloxane, or the like; alkylalkoxysilane treatment using methyltrimethoxysilane, ethyltrimethoxysilane, hexyltrimethoxysilane, octyltrimethoxysilane, octyltriethoxysilane, or the like; fluorine compound treatment using perfluoroalkylphosphate, perfluoropolyether, perfluoropolyetheralkylphosphate, or the like; N-acylamino acid treatment using N-acylglutamic acid, N-acylaspartic acid, N-acyllysine, or the like; lecithin treatment; lysine treatment; metal soap treatment; and organic titanate treatment using isopropyl titanium triisostearate, or the like.
These treatments can be carried out either alone or in combination of two or more. These hydrophobic treatments can be carried out by a conventional method.

Component (D) colorant can be used alone or in combination of two or more. In order to obtain a finish with good color development, the content is preferably 0.1% by mass or more in the total composition, more preferably 0.5% by mass or more, and even more preferably 1% by mass or more, and in order to obtain a uniform finish with less unevenness, the content is preferably 30% by mass or less, more preferably 25% by mass or less, and even more preferably 20% by mass or less. The content of component (D) is preferably 0.1 to 30% by mass in the total composition, more preferably 0.5 to 25% by mass, and even more preferably 1 to 20% by mass.

The oil-based cosmetic preparation of the present embodiment may further contain (E) a non-volatile liquid oil other than the component (A), and it is preferable for the preparation to contain the component (E) in terms of suppressing stickiness.
Here, liquid oil refers to an oil component that has fluidity at 25° C., and also includes a paste-like oil component as long as it has fluidity.

The non-volatile liquid oil of component (E) may be any oil that is commonly used in cosmetics, such as linear or branched hydrocarbon oils such as liquid paraffin, light isoparaffin, liquid isoparaffin, mineral oil, polybutene, polyisobutene, hydrogenated polyisobutene, hydrogenated polydecene, squalane, and squalene; 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; animal oils such as liquid lanolin; isopropyl myristate, octyldodecyl myristate, isopropyl isostearate, isononyl isononanoate, butyl stearate, oleyl oleate, isotridecyl isononanoate, isostearyl myristate, octyldodecyl ricinoleate, and hydroxystearin. Octyl acetate, ethylhexyl palmitate, cetyl ethylhexanoate, octyl methoxycinnamate, tocopherol acetate, propylene carbonate, propylene glycol dicaprylate, neopentyl glycol dicaprate, neopentyl glycol diethylhexanoate, propanediol diisostearate, glyceryl monomyristate monoisostearate, dicapric/caprylic propanediol, caprylic/capric triglyceride, glyceryl tri-2-ethylhexanoate, triethylhexanoin, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythrityl tetraoctanoate, pentaerythrityl tetraethylhexanoate, polyglyceryl-6 octacaprylate, ditrimethylolpropane oligo(isostearic/sebacic acid) fatty acid esters such as esters, dipentaerythrityl tripolyhydroxystearate, di(phytosteryl/octyldodecyl) lauroyl glutamate, di(phytosteryl, behenyl, octyldodecyl) lauroyl glutamate, trehalose isostearate esters, ethylhexyl hydroxystearate, phytosterol fatty acid esters, cholesterol fatty acid esters, polyglycerin fatty acid esters, pentaerythritol fatty acid esters, dl-α-tocopherol, and dl-α-tocopherol nicotinate; higher alcohols such as octyldodecanol; diphenyl dimethicone, dimethylpolysiloxane, methylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, higher alcohol-modified organopolysiloxane, tris(trimethylsiloxy)methylsilane , silicone oils such as trimethylpentaphenyltrisiloxane; fluoro oils such as fluoropolyethers and perfluoroalkyl ether silicones; creams and pastes such as trilanolin fatty acid glyceryl, soft lanolin fatty acid, petrolatum, branched or hydroxylated fatty acid cholesteryl, dipentaerythritol fatty acid esters (dipentaerythritol hexaoxystearate, etc.), hydrogenated castor oil isostearate, hydrogenated castor oil monohydroxystearate, tri(capryl, capric, myristic, stearic acid)glyceride, myristyl lactate, hydrogenated castor oil dimer dilinoleate, dimer dilinoleate (phytosteryl/isostearyl/cetyl/stearyl/behenyl), phytosteryl oleate, di(octyldodecyl, phytosteryl, behenyl) lauroyl glutamate, etc.

From the viewpoint of improving the performance of not being sticky and not transferring color, it is preferable that component (E) contains a non-volatile liquid oil that is incompatible with component (A) by itself (E1) but is compatible with component (A) in the presence of component (C).
It is believed that when component (C) volatilizes after application of the cosmetic of the present invention, component (E1) separates from the layer (film) consisting of components (A) and (B) and moves to the surface layer, so to speak, covering the layer consisting of components (A) and (B). This improves color transfer resistance and also makes it possible for the layer of component (E1) to suppress stickiness caused by component (A) and other oils.
Here, the phrase "compatibility between component (E1) alone and component (A)" refers to a state in which, when components (E1) and (A) are heated to 90°C and stirred and mixed in a ratio of (E1):(A) = 1:1 (mass ratio), and then allowed to stand, the mixture cools to 20°C and is separated into two layers with a boundary or is opaque; a transparent state with no boundary is referred to as "compatible."
Furthermore, the expression "compatible" between component (E1) and component (A) in the presence of component (C) means that when components (E1), (A), and (C) are heated to 90°C and stirred and mixed in a ratio of (E1):(A):(C) = 1:1:2 (mass ratio), and then allowed to stand, and the mixture cools to 20°C, the mixture is in a transparent state with no boundary. A state in which the mixture is separated into two layers with a boundary or is opaque is referred to as "incompatible."
Incidentally, the component (E1) may or may not be compatible with the component (B).

Component (E1) is preferably a silicone-based oil agent. By having a silicone skeleton, it is easy to obtain the property that it is not compatible with component (A) alone, but is compatible with component (A) in the presence of component (C).
Examples of silicone-based oils include phenyl-modified silicones such as dimethylpolysiloxane (dimethicone), methylhydrogenpolysiloxane, phenyltrimethicone, diphenylsiloxyphenyltrimethicone, methylphenylpolysiloxane, diphenyldimethicone, trimethylsiloxyphenyldimethicone, and trimethylpentaphenyltrisiloxane, as well as various modified silicones such as higher alcohol-modified organopolysiloxanes.
Among these, it is preferable to contain one or more selected from dimethicone and phenyl-modified silicone, since this further improves the lack of stickiness and color transfer.

Furthermore, component (E1) preferably has a viscosity of 50 to 100,000 cs, and more preferably 100 to 10,000 cs at 20° C. A viscosity of 50 cs or more makes it easier to obtain the property of being incompatible with component (A) alone, while a viscosity of 100,000 cs or less makes it easier to obtain the property of being compatible with component (A) in the presence of component (C).
Here, the viscosity is measured in an environment of 20° C. using a rotational viscometer, specifically a B-type viscometer.

The non-volatile liquid oil of component (E) may be one or more, and the content is preferably 1% by mass or more, more preferably 3% by mass or more, and even more preferably 5% by mass or more in the total composition from the viewpoint of suppressing stickiness, and is preferably 50% by mass or less, more preferably 45% by mass or less, and even more preferably 40% by mass or less in the viewpoint of obtaining a color transfer prevention effect. The content of component (E) is preferably 1 to 50% by mass, more preferably 3 to 45% by mass, and even more preferably 5 to 40% by mass in the total composition.
As the component (E), the component (E1) may be used in combination with another component (E) (component (E2)).

In this embodiment, the total mass ratio of components (A) and (B) to component (E), ((A)+(B))/(E), is preferably 0.5 or more, more preferably 0.6 or more, and even more preferably 0.7 or more, in terms of improving the color transfer prevention effect, and is preferably 6 or less, more preferably 4.5 or less, and even more preferably 3 or less, in terms of suppressing stickiness. In addition, the total mass ratio of components (A) and (B) to component (E), ((A)+(B))/(E), is preferably 0.5 to 6, more preferably 0.6 to 4.5, and even more preferably 0.7 to 3.

In this embodiment, the mass ratio ((A)+(B))/(E1) of the total amount of components (A) and (B) to component (E1) is preferably 0.5 or more, more preferably 0.65 or more, and even more preferably 0.8 or more, from the viewpoints of obtaining good color development immediately after application and good adhesion 3 minutes after application. Moreover, from the viewpoints of preventing color transfer and sticky feeling 3 minutes after application, and ...
The mass ratio of the total amount of components (A) and (B) to component (E1), ((A)+(B))/(E1), is preferably from 0.5 to 10, more preferably from 0.65 to 6, and even more preferably from 0.8 to 5.

In this embodiment, the mass ratio ((A)+(E1))/(C) of the total content of components (A) and (E1) to component (C) is preferably 0.5 or more, more preferably 0.7 or more, even more preferably 0.8 or more, and even more preferably 0.9 or more, in view of the fact that component (E1) is easily separated from the layer (film) consisting of components (A) and (B) and moves toward the surface layer side when component (C) volatilizes, and the time until the effect is exerted is shortened. Moreover, in view of the fact that component (E1) is easily compatible with component (A) in the presence of component (C) and the comfort at the time of application is improved, the mass ratio is preferably 10 or less, more preferably 8 or less, and even more preferably 6 or less.
The mass ratio of the total content of components (A) and (E1) to component (C), ((A)+(E1))/(C), is preferably 0.5 to 10, more preferably 0.7 to 8, even more preferably 0.8 to 8, and still more preferably 0.9 to 6.

In the present embodiment, the product of the weighted average of the viscosity of component (A) and the weighted average of the reciprocal of the viscosity of component (E1) [(weighted average of the viscosity of component (A)) × (weighted average of the reciprocal of the viscosity of component (E1))] is preferably 1 or more, and more preferably 2 or more, because when component (C) volatilizes, component (E1) is more likely to separate from the layer (coating) composed of components (A) and (B) and move toward the surface layer side.
Weighted average viscosity of component (A) = Σ(Cx × Vx) / ΣCx
Weighted average of the reciprocal of the viscosity of component (E1)=Σ(Cy/Vy)/ΣCy
Vx indicates the viscosity of component X contained in component (A).
Cx denotes the mass % of component X having a viscosity of Vx.
Vy indicates the viscosity of component Y contained in component (E1).
Cy denotes the weight percent of component Y having a viscosity of Vy.

The oil-based cosmetic of the present embodiment can further contain an emulsifier (F) and water (G) to form an emulsion cosmetic, which can improve the light feel when applied. Here, oil-based includes W/O emulsion systems.
The emulsifier of component (F) is not limited as long as it is one that is commonly used in ordinary cosmetics, but a surfactant is preferred, and a nonionic surfactant is more preferred because it is less susceptible to the effects of electrolytes, allowing for a high degree of freedom in formulation design, and because it allows for the production of a stable emulsion.
Examples of nonionic surfactants include sorbitan fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, propylene glycol fatty acid esters, polyethylene glycol fatty acid esters, sucrose fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene propylene glycol fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, polyoxyethylene phytostanol ether, polyoxyethylene phytosterol ether, polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, alkyl glyceryl ether-modified silicones, polyether-modified silicones, polyoxyalkylene-alkyl co-modified silicones, and polyoxyalkylene-fluoroalkyl co-modified silicones.

Of these, silicone surfactants are preferred, and polyether-modified silicones are more preferred, as they improve the lack of stickiness three minutes after application and further reduce skin irritation.

The emulsifier of component (F) is preferably a W/O emulsion, which allows for a finish with good color development immediately after application, and therefore preferably has an HLB value of 2.5 to 5.5, more preferably 3 to 5.

Here, HLB (Hydrophilic-Lipophilic Balance) indicates the molecular weight of the hydrophilic group portion in the total molecular weight of a surfactant, and for nonionic surfactants, it can be calculated by Griffin's formula.
The HLB of a mixed surfactant consisting of two or more nonionic surfactants can be calculated as follows: The HLB of the mixed surfactant is the arithmetic average of the HLB values of each nonionic surfactant based on the blending ratio.

Mixed HLB=Σ(HLBx×Wx)/ΣWx
HLBx indicates the HLB value of nonionic surfactant X.
Wx denotes the weight (g) of the nonionic surfactant X having a value of HLBx.

One or more types of emulsifiers of component (F) can be used, and the content is preferably 0.1% by mass or more in the total composition from the viewpoints of stabilizing the emulsion, improving the finish with good color development immediately after application, the lack of color transfer 3 minutes after application, and improving the feeling of adhesion, more preferably 1% by mass or more, and even more preferably 2% by mass or more, and is preferably 10% by mass or less, more preferably 6% by mass or less, and even more preferably 5% by mass or less from the viewpoints of improving the light feel upon application and the lack of stickiness 3 minutes after application. The content of component (F) is preferably 0.1 to 10% by mass in the total composition, more preferably 1 to 6% by mass, and even more preferably 2 to 5% by mass.

In this embodiment, the content of (G) water is preferably 10% by mass or more, more preferably 15% by mass or more, and even more preferably 20% by mass or more in the total composition from the viewpoint of improving the light feel when applied, and is preferably 60% by mass or less, more preferably 55% by mass or less, and even more preferably 50% by mass or less in terms of the feeling of adhesion 3 minutes after application and the lack of dryness 3 minutes after application. The content of component (G) is preferably 10 to 60% by mass, more preferably 15 to 55% by mass, and even more preferably 20 to 50% by mass in the total composition.

The oil-based cosmetic preparation of the present embodiment may further contain (H) a water-soluble volatile polar solvent other than water, which can improve the light feel when applied.
Such water-soluble volatile polar solvents include, for example, ethanol.

One or more types of component (H) may be used, and the content is preferably 0.1% by mass or more in the total composition from the viewpoint of improving the light feel when applied, more preferably 1% by mass or more, and even more preferably 2% by mass or more, and from the viewpoints of the feeling of adhesion 3 minutes after application and the lack of dryness 3 minutes after application, it is preferably 10% by mass or less, more preferably 8% by mass or less, and even more preferably 7% by mass or less. The content of component (H) is preferably 0.1 to 10% by mass in the total composition, more preferably 1 to 8% by mass, and even more preferably 2 to 7% by mass.

In this embodiment, the total content of components (G) and (H) is preferably 11% by mass or more, more preferably 15% by mass or more, and even more preferably 20% by mass or more in the total composition in order to further improve the light feel when applied and the lack of stickiness 3 minutes after application, and is preferably 5070% by mass or less, more preferably 60% by mass or less, and even more preferably 50% by mass or less in order to further improve the close contact feeling 3 minutes after application and the lack of dryness 3 minutes after application. The total content of components (G) and (H) is preferably 11 to 70% by mass in the total composition, more preferably 15 to 60% by mass, and even more preferably 20 to 50% by mass.

In this embodiment, the mass ratio of the total content of components (A) and (B) to the total content of components (C), (G), and (H), ((A) + (B))/((C) + (G) + (H)), is preferably 0.05 or more, more preferably 0.1 or more, and even more preferably 0.2 or more, in order to improve the finish with good color development immediately after application, the lack of dry feeling 3 minutes after application, the lack of color transfer 3 minutes after application, and the feeling of adhesion 3 minutes after application, and from the standpoint of improving the light feel upon application and the lack of sticky feeling 3 minutes after application, is preferably 5 or less, more preferably 3 or less, and even more preferably 2 or less. Furthermore, the mass ratio of the total content of components (A) and (B) to the total content of components (C), (G), and (H), ((A) + (B))/((C) + (G) + (H)), is preferably 0.05 to 5, more preferably 0.1 to 3, and even more preferably 0.2 to 2.

The oil-based cosmetic preparation of the present embodiment may further contain (I) a water-soluble non-volatile polar solvent other than water, which can further improve the lack of dryness three minutes after application.
As component (I), a polyhydric alcohol is preferred.
The polyhydric alcohols are those used in ordinary cosmetics, and examples of the dihydric alcohols include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, 1,3-butylene glycol, 1,3-propanediol, etc.; the trihydric alcohols include glycerin, trimethylolpropane, etc.; the tetrahydric alcohols include diglycerin, erythritol, etc.; and the pentahydric or higher polyhydric alcohols include polyglycerins such as triglycerin; sugars and sugar alcohols such as glucose, maltose, maltose, sucrose, xylitol, sorbitol, malbitol, polyoxyethylene methyl glucoside, polyoxyethylene ethyl glucoside, polyoxyethylene propylene glucoside, etc.
Of these, glycerin and dipropylene glycol are preferred from the viewpoint of improving the lack of dryness three minutes after application.

One or more types of component (I) may be used, and the content is preferably 1% by mass or more, more preferably 3% by mass or more, and even more preferably 5% by mass or more in the total composition from the viewpoint of improving the lack of dryness 3 minutes after application, and is preferably 20% by mass or less, more preferably 18% by mass or less, and even more preferably 15% by mass or less in the viewpoint of improving the light feel when applied. The content of component (I) is preferably 1 to 20% by mass, more preferably 3 to 18% by mass, and even more preferably 5 to 15% by mass in the total composition.

In this embodiment, the mass ratio ((G)+(H)+(I))/(F) of the total content of components (G), (H) and (I) to component (F) is preferably 1 or more, more preferably 3 or more, and even more preferably 5 or more, from the viewpoints of improving the light feel when applied and the lack of stickiness 3 minutes after application, and is preferably 100 or less, more preferably 80 or less, and even more preferably 40 or less, from the viewpoints of improving the finish with good color development immediately after application, the lack of color transfer 3 minutes after application, and the feeling of adhesion 3 minutes after application. In addition, the mass ratio ((G)+(H)+(I))/(F) of the total content of components (G), (H) and (I) to component (F) is preferably 1 to 100, more preferably 3 to 80, and even more preferably 5 to 40.

The oil-based cosmetic preparation of the present embodiment may further contain a wax that is solid at 25° C. The term “solid” refers to the property of being solid.
The wax that is solid at 25°C is not limited as long as it is one that is used in ordinary cosmetics, and examples thereof include mineral waxes such as ozokerite and ceresin; petroleum waxes such as paraffin and microcrystalline wax; synthetic hydrocarbon waxes such as Fischer-Tropsch wax and polyethylene wax; vegetable waxes such as carnauba wax, candelilla wax, rice wax, Japan wax, sunflower wax, and hydrogenated jojoba oil; animal waxes such as beeswax and whale wax; and synthetic waxes such as silicone wax, fluorine-based wax, and synthetic beeswax.

The melting point of the wax is preferably 60°C or higher in order to provide the oil-based cosmetic with a suitable hardness, inhibit oil seepage, and provide moisture, and is preferably 140°C or lower in order to provide a light feel on the skin, and more preferably 115°C or lower.

The wax that is solid at 25°C can be used alone or in combination of two or more kinds. The content is preferably 0.5% by mass or more, more preferably 1% by mass or more, based on the total composition in terms of providing moisture, and is preferably 30% by mass or less, more preferably 20% by mass or less, based on the viewpoint of obtaining a light wearing feel. The content of the wax is preferably 0.5 to 30% by mass, more preferably 1 to 20% by mass, based on the total composition.

In addition to the above-mentioned components, the oil-based cosmetic of this embodiment may contain components used in ordinary cosmetics, such as oil components other than those mentioned above, powders other than those mentioned above, surfactants, lower alcohols, polyhydric alcohols, polymeric compounds, ultraviolet absorbers, antioxidants, dyes, fragrances, preservatives, pH adjusters, blood circulation promoters, anti-inflammatory agents, cooling agents, germicides, skin activators, moisturizers, thickeners, etc.

The oil-based cosmetic of this embodiment can be produced by a conventional method, and the formulation may be any of solid, semi-solid, gel, liquid, etc.

The oil-based cosmetic of this embodiment is a cosmetic having an oil as a continuous phase, and is used on the skin, lips, eyelashes, nails, and hair, and is preferably used on the lips. It can be lip cosmetics such as lipstick, lip balm, lip gloss, and lip liner; makeup cosmetics such as mascara, eyeliner, eye shadow, cheek color, foundation, and concealer; cream, milky lotion, beauty serum, massage agent, deodorant, sunscreen, hair growth agent, hair color, hair wax, and hair foam. Among them, it is suitable as a lip cosmetic selected from lipstick, lip balm, lip gloss, and lip liner.

Examples 1 to 10, Comparative Examples 1 to 5
As an oil-based cosmetic, a liquid lipstick having the composition shown in Table 1 was prepared and evaluated for light feel when applied, good color finish immediately after application, lack of stickiness 3 minutes after application, lack of dryness 3 minutes after application, lack of color transfer 3 minutes after application, and feeling of adhesion 3 minutes after application. The results are also shown in Table 1.
All of the silicone resins of component (B) used in the examples are solid at 25° C. Examples 1 to 10 are reference examples.

(Production method)
The above components (A), (D), (E) and other components were heated and dissolved at 100°C for 30 minutes, and then uniformly mixed using a disperser. Next, the above components (B) and (C) were added, and the mixture was uniformly mixed for another 15 minutes. After degassing, the mixture was poured into a dipping container and cooled to obtain a liquid lipstick. The cosmetic applicator (tip) used had a flattened applicator part with a bristled surface.

(Evaluation Method)
(1) Light Feeling When Applied Five expert panelists evaluated the feel of each liquid lipstick when applied to the lips according to the following criteria. The results were expressed as an integrated score by the five panelists.
4: It feels very light to wear.
3: It feels light to wear.
2: Feels slightly light to wear.
1: It doesn't feel light to wear.

(2) A vibrant color finish immediately after application:
Five expert panelists evaluated the color development immediately after applying each liquid lipstick to the lips according to the following criteria. The results are shown as an integrated score by the five panelists.
4: The color is very good.
3: The finish has good color development.
2: The color is somewhat good.
1: The finish is not very pigmented.

(3) Lack of stickiness 3 minutes after application:
Five expert panelists applied each liquid lipstick to the lips and evaluated the lack of stickiness after 3 minutes according to the following criteria. The results were expressed as an integrated score by the five panelists.
4: No sticky feeling at all.
3: Almost no sticky feeling.
2: Slightly sticky feeling.
1: Sticky feeling.

(4) No dry feeling 3 minutes after application:
Five expert panelists applied each liquid lipstick to their lips and evaluated the lack of dryness after 3 minutes according to the following criteria. The results were expressed as an integrated score by the five panelists.
4: No dry feeling at all.
3: Almost no dryness.
2: Feels slightly dry.
1: Feels dry.

(5) No color transfer 3 minutes after application:
Five expert panelists applied each liquid lipstick to their lips, and after three minutes, drank water from a cup of 20°C. They then evaluated the lack of color transfer to the cup according to the following criteria. The results were shown as an integrated score by the five panelists.
4: There is absolutely no color transfer.
3: Almost no color transfer.
2: There is some color transfer.
1: Color transfer occurs.

(6) Feeling of adhesion 3 minutes after application:
Five expert panelists applied each liquid lipstick to their lips, and after 3 minutes, evaluated the feeling of the lipstick adhering to the lips according to the following criteria. The results were expressed as an integrated score by the five panelists.
4: It feels very close to the skin.
3: Feels tight.
2: There is a slight feeling of adhesion.
1: No adhesion.

Example 11
As an oil-based cosmetic, a lip gloss having the composition shown in Table 2 was produced in the same manner as the liquid lipstick described above.
The obtained lip gloss had a light feel when applied, gave a good color finish immediately after application, and felt firm and intimate three minutes after application without any sticky, dry or color transfer.
It should be noted that Example 11 is a reference example.

Examples 12 to 13
As oil-based cosmetics, a stick cosmetic (Example 12) having the composition shown in Table 3 and a concealer (Example 13) having the composition shown in Table 4 were produced. The stick cosmetic in Table 3 is a rod-shaped, multi-purpose cosmetic that can be used as lipstick, eye shadow, blush, etc.
The obtained stick cosmetic and concealer had a light feel when applied, gave a good color finish immediately after application, and three minutes after application there was no sticky feeling, no dry feeling, and no color transfer, and three minutes after application there was a feeling of adhesion. Examples 12 and 13 are reference examples.

(Production method)
Components (A), (D), (E) and other components were heated and dissolved at 100°C for 30 minutes and uniformly mixed using a disperser. Next, components (B) and (C) were added and uniformly mixed for an additional 15 minutes. After degassing, the mixture was poured into a mold and cooled to obtain a stick cosmetic preparation and a concealer.

Examples 14 to 29
Liquid lipsticks having the compositions shown in Table 5 were prepared in the same manner as in Examples 1 to 10, and were evaluated for light feel when applied, good color finish immediately after application, lack of stickiness 3 minutes after application, lack of dryness 3 minutes after application, lack of color transfer 3 minutes after application, and feeling of adhesion 3 minutes after application. The results are also shown in Table 5.
The silicone resin of component (B) used in the examples is a solid at 25°C.
Furthermore, all of the non-volatile liquid oils of component (E1) used in each example are incompatible with component (A) by themselves, but are compatible with component (A) in the presence of component (C). When two or more types of component (E1) are used, component (E1) alone is incompatible with component (A) at that mixing ratio, but is compatible with component (A) in the presence of component (C).
For example, in Example 17, component (E1) dimethicone (KF-96A-50cs) and dimethicone (KF-96H-100,000cs) were mixed in a mixing ratio of 17:3, and this was mixed with component (A) dipentaerythrityl pentaisostearate (Salacos DP-518N) and component (C) isododecane (Marukasol R) in a ratio of (E1):(A):(C) = 1:1:2 (mass ratio) at 90°C, stirred and mixed, and then allowed to stand. When the mixture reached 20°C, there was no boundary and it was in a transparent state. On the other hand, components (E1) and (A) in the above mixing ratio were heated to 90°C and stirred and mixed in a ratio of (E1):(A) = 1:1 (mass ratio) in the absence of component (C), and then allowed to stand. When the mixture reached 20°C, there was a boundary and it was separated into two layers.
It should be noted that Examples 14 to 29 are for reference purposes only.

Examples 30 to 41
A liquid lipstick (W/O emulsion system) having the composition shown in Table 6 was prepared, and evaluated in the same manner as in Examples 1 to 10 for light feel on application, good color finish immediately after application, lack of stickiness 3 minutes after application, lack of dryness 3 minutes after application, lack of color transfer 3 minutes after application, and feeling of adhesion 3 minutes after application. The results are also shown in Table 6.
The silicone resin of component (B) used in the examples is a solid at 25°C.

(Production method)
Components (A), (D), (E), (F) and other oil phase components were heated and dissolved at 100°C for 30 minutes, and mixed uniformly using a disperser. Next, the above components (B) and (C) were added and mixed uniformly for another 15 minutes, and (G), (H), (I) and other water phase components were added after being mixed uniformly at room temperature, and mixed uniformly for 15 minutes using a homomixer at 80°C. The mixture was then cooled to 30°C, degassed, and poured into a dipping container to obtain a liquid lipstick. The cosmetic applicator (tip) used had a flattened application part with a bristled surface.

Claims (15)

The following components (A), (B) , (C) , (F) and (G) :
(A) a liquid ester compound having an isostearyl group and a structure represented by general formula (1),

(In the formula, ^R1 and ^R2 each represent a branched hydrocarbon group having 7 carbon atoms and may be the same or different.)
(B) a silicone resin,
(C) volatile oil 1 to 30% by mass ,
(F) an emulsifier,
(G) Water
A W/O emulsion oil-based cosmetic composition comprising: The oil-based cosmetic according to claim 1, wherein the total mass ratio of components (A) and (B) to component (C), ((A) + (B))/(C), is 1.5 to 30. The oil-based cosmetic according to claim 1 or 2, wherein the viscosity of component (A) at 20°C is 2,500 to 1,000,000 mPa·s. The oil-based cosmetic according to any one of claims 1 to 3, wherein component (A) is at least one selected from diglyceryl monoisostearate, diglyceryl diisostearate, glyceryl diisostearate, glyceryl triisostearate, diglyceryl triisostearate, diglyceryl tetraisostearate, dipentaerythrityl pentaisostearate, pentaerythrityl tetraisostearate, dipentaerythrityl tetraisostearate, dipentaerythrityl triisostearate, and diisostearyl malate. The oil-based cosmetic according to any one of claims 1 to 4, wherein component (B) is at least one selected from trimethylsiloxysilicate and fluorine-modified silicone resin. The oil-based cosmetic according to any one of claims 1 to 5, wherein component (B) is solid at 25°C. The oil-based cosmetic according to any one of claims 1 to 6, wherein component (C) is at least one selected from volatile silicone oils and volatile hydrocarbon oils. The oil-based cosmetic according to any one of claims 1 to 7 further contains (D) a colorant. The oil-based cosmetic according to any one of claims 1 to 8 further contains (E) a non-volatile liquid oil other than component (A). The oil-based cosmetic preparation according to any one of claims 1 to 9 , further comprising (H) a water-soluble volatile polar solvent other than water. The oil-based cosmetic preparation according to any one of claims 1 to 10 , further comprising (I) a water-soluble non-volatile polar solvent other than water. The oil-based cosmetic preparation according to any one of claims 1 to 11 , wherein the emulsifier of component (F) has an HLB value of 2.5 to 5.5. The oil-based cosmetic preparation according to any one of claims 1 to 12 , wherein the emulsifier of component (F) is a silicone-based surfactant. The oil-based cosmetic preparation according to any one of claims 1 to 13 , wherein the content of the emulsifier as component (F) is 0.1 to 10 mass%. The oil-based cosmetic according to any one of claims 1 to 14 , which is a lip cosmetic.