JP7650638B2 - Emulsion composition - Google Patents

Description

The present invention relates to an emulsion composition.

In makeup cosmetics such as foundation, the cosmetics need to be firmly attached to the skin in order to cover pores.
For example, Patent Document 1 describes that a composite powder consisting of silicone rubber particles whose surfaces are coated with silicone resin, and a water-in-oil emulsion cosmetic containing a non-volatile oil agent other than silicone oil, makes the skin look bright, has excellent spreadability and adhesion, and exhibits a pore-hiding effect.
On the other hand, sunscreen cosmetics containing carbonates are known.
For example, Patent Document 2 describes a sunscreen cosmetic composition containing an inorganic ultraviolet scattering agent made of a hydrophobic fine metal oxide particle, tubular basic magnesium carbonate, and an oil component, and Patent Document 3 describes a cosmetic composition having UV-A and/or UV-B protection, which contains at least one inorganic UV filter and surface-reacted calcium carbonate.
In these cosmetic compositions, the ultraviolet protection effect is improved by using carbonates.

JP 2014-172872 A JP 2011-236182 A Special Publication No. 2020-506953

Conventional emulsion cosmetics tend to slide over the skin when applied, making it difficult to feel that the cosmetics have adhered adequately to the skin. In addition, the cosmetics do not adhere well to pores, making it impossible to cover pores adequately. Another issue is that the cosmetics leave a sticky feeling on the skin after application.

The inventors have discovered that an emulsion composition that solves the above problems can be obtained by using a combination of a sorbitan fatty acid ester, a specific surface-treated color pigment, a non-volatile oil that is liquid at 25°C, and a carbonate.

The present invention comprises the following components (A), (B), (C), (D) and (E):
(A) sorbitan fatty acid ester,
(B) a color pigment treated with a surface treatment agent containing an alkyl group having 3 or more carbon atoms;
(C) a non-volatile oil that is liquid at 25°C;
(D) carbonate,
(E) The emulsion composition contains water.

The emulsion composition of the present invention reduces the slippery feeling when applied, improves the adhesion to the skin after application, and can sufficiently cover pores, while reducing the sticky feeling on the skin after application.
The term "slippery feeling" refers to the feeling that when the emulsion cosmetic is applied to the face using the fingertips, it spreads over the skin indefinitely, as if a liquid oil were being spread, and there is no real feeling that the emulsion cosmetic is spreading while adhering to the skin. The term "adherence" refers to the fact that the emulsion composition on the skin after application follows the movement of the skin even when the facial skin is moved, such as by changing facial expressions, but does not come off from the surface of the skin, and that the emulsion composition is firmly attached without being partially gathered due to wrinkles or fine wrinkles.

The component (A) used in the present invention is a sorbitan fatty acid ester.
The sorbitan fatty acid ester preferably has an HLB of 1 to 10, more preferably 2 to 7, and even more preferably 3 to 6, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied, improving the adhesion to the skin after application, and obtaining a stable emulsion composition.
Here, HLB (Hydrophilic-Lipophilic Balance) indicates the molecular weight of the hydrophilic group portion in the total molecular weight of the surfactant, and is calculated by Griffin's formula. When a surfactant is composed of two or more nonionic surfactants, the HLB of the mixed surfactant is calculated as follows. The HLB of the mixed surfactant is the phase arithmetic average of the HLB values of the individual nonionic surfactants based on their blending ratio.
Mixed HLB=Σ(HLBx×Wx)/ΣWx
HLBx indicates the HLB value of nonionic surfactant X.
Wx represents the mass (g) of the nonionic surfactant X having a value of HLBx.

Examples of sorbitan fatty acid esters include sorbitan monoisostearate, sorbitan monooleate, sorbitan sesquistearate, and sorbitan sesquioleate. From the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied, improving the adhesion to the skin after application, and obtaining a stable emulsion composition, sorbitan monoisostearate, sorbitan monooleate, and sorbitan sesquistearate are preferred, sorbitan monoisostearate and sorbitan sesquistearate are more preferred, and sorbitan monoisostearate is even more preferred.
As the sorbitan fatty acid ester of component (A), commercially available products can be used. For example, sorbitan monoisostearate is Span 120 (HLB 4.7) (manufactured by Croda), sorbitan sesquistearate is NIKKOL SS-15V (HLB 4.2), and sorbitan monooleate is NIKKOL SO-10V (HLB 4.3) (all manufactured by Nikko Chemicals Co., Ltd.).

The content of component (A) is preferably 0.05 to 5% by mass, more preferably 0.08 to 3% by mass, and even more preferably 0.2 to 2% by mass, of the total composition, from the viewpoints of reducing the slipperiness of the emulsion composition on the skin when applied, improving the adhesion to the skin after application, and obtaining a stable emulsion composition.

Component (B) is a color pigment that has been treated with a surface treatment agent that contains an alkyl group having 3 or more carbon atoms.
The color pigments include those used in ordinary cosmetics, such as metal oxides such as titanium oxide, zinc oxide, cerium oxide, aluminum oxide, yellow iron oxide, black iron oxide, red ocher, Prussian blue, ultramarine, chromium oxide, and chromium hydroxide, metal complexes such as manganese violet and cobalt titanate, and inorganic pigments such as carbon black. Examples of the color pigments used in the composite pigments include composite pigments in which the color pigments and pearl pigments are combined. Examples of the pearl pigments used in the composite pigments include natural or synthetic inorganic powders such as mica, phlogopite, sericite, glass, kaolin, bismuth oxychloride, cerium oxide, calcium sulfate, barium sulfate, magnesium sulfate, and plate-like alumina powder. Specific examples of the composite pigments include titanium oxide-coated mica, iron oxide-coated mica, iron oxide-coated mica titanium, iron oxide-coated synthetic phlogopite, chromium oxide-coated mica titanium, titanium oxide-coated glass powder, iron oxide-coated glass powder, titanium oxide-containing glass powder, and iron oxide-containing glass powder.
Among these, metal oxides are preferred, and it is more preferred to include at least one or more selected from titanium oxide, zinc oxide, yellow iron oxide, black iron oxide, and red iron oxide, and it is even more preferred to include at least one or more selected from titanium oxide, yellow iron oxide, black iron oxide, and red iron oxide.

Examples of the treatment with a surface treatment agent containing an alkyl group having 3 or more carbon atoms include surface treatments such as alkylalkoxysilane treatment, metal soap treatment, acylated amino acid treatment, lecithin treatment, and organic titanate treatment.
Alkylalkoxysilane treatments include those having straight or branched chain alkyl groups having 6 to 20 carbon atoms.
In the alkylalkoxysilane treatment, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied and improving the adhesion to the skin after application, the number of carbon atoms in the alkyl group constituting the alkylalkoxysilane is preferably 6 to 18, more preferably 8 to 14, even more preferably 8 to 12, and even more preferably 8.
In addition, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied and improving the adhesion to the skin after application, the alkyl group constituting the alkylalkoxysilane is preferably linear.
Examples of the alkylalkoxysilane treatment include triethoxycaprylylsilane treatment and trimethoxycaprylylsilane treatment. From the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied and improving the adhesion to the skin after application, triethoxycaprylylsilane treatment is preferred.

In the acylated amino acid treatment, the amino acids constituting the acylated amino acids include proline, hydroxyproline, alanine, glycine, sarcosine, lysine, aspartic acid, glutamic acid, etc., and salts thereof are also included. The number of carbon atoms in the alkyl group constituting the acyl group in the acylated amino acid treatment includes linear or branched alkyl groups having 3 to 23 carbon atoms.
In the acylated amino acid treatment, from the viewpoint of reducing the feeling of slipping on the skin of the emulsion composition when applied and improving the feeling of adhesion to the skin after application, the amino acid constituting the acylated amino acid is preferably at least one or more selected from lysine, aspartic acid, and glutamic acid, more preferably at least one or more selected from aspartic acid and glutamic acid, and even more preferably glutamic acid. In addition, from the viewpoint of reducing the feeling of slipping on the skin of the emulsion composition when applied and improving the feeling of adhesion to the skin after application, the number of carbon atoms of the alkyl group constituting the acyl group of the acylated amino acid is preferably 7 to 21, more preferably 11 to 17, and even more preferably 13 to 17. In addition, from the viewpoint of reducing the feeling of slipping on the skin of the emulsion composition when applied and improving the feeling of adhesion to the skin after application, the alkyl group constituting the acyl group of the acylated amino acid is preferably straight-chained.

Examples of the acylated amino acid treatment include stearoyl glutamic acid treatment, lauroyl aspartic acid treatment, dilauroyl glutamic acid lysine treatment, lauroyl lysine treatment, etc., and from the viewpoint of reducing the slippery feeling of the emulsion composition on the skin when applied and improving the adhesion to the skin after application, at least one or more selected from stearoyl glutamic acid treatment, lauroyl aspartic acid treatment, and dilauroyl glutamic acid lysine treatment are preferred, at least one or more selected from stearoyl glutamic acid treatment and lauroyl aspartic acid treatment are more preferred, and stearoyl glutamic acid treatment is preferred. Examples of these salts include Na, Ca, Al, Mg, Zn, Zr, and Ti salts, and Na salts are preferred.
In addition, the acylated amino acid treatment is preferably used in combination with a silicone treatment from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied and improving the adhesion to the skin after application.

The organic titanate treatment may be an alkyl titanate treatment, such as a long-chain carboxylic acid type, a pyrophosphate type, a phosphorous acid type, or an amino acid type alkyl titanate treatment.
As the organic titanate treatment, a long-chain carboxylic acid type alkyl titanate treatment is preferred from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied and improving the adhesion to the skin after application.
Examples of the long-chain carboxylic acid type alkyl titanate treatment include an isopropyl triisostearoyl titanate treatment, an isopropyl trioctanoyl titanate treatment, an isopropyl dimethacryl isostearoyl titanate treatment, an isopropyl isostearoyl diacryl titanate treatment, a diisostearoyl ethylene titanate treatment, and the like. From the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied and improving the adhesion to the skin after application, at least one or more treatments selected from the isopropyl triisostearoyl titanate treatment and the isopropyl trioctanoyl titanate treatment are preferred, and an isopropyl triisostearoyl titanate treatment is more preferred.
The organic titanate treatment is preferably used in combination with the acylated amino acid treatment from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied and improving the adhesion to the skin after application.

From the viewpoint of reducing the slippery feeling of the emulsion composition on the skin when applied and improving the adhesion to the skin after application, the treatment with a surface treatment agent containing an alkyl group having 3 or more carbon atoms preferably includes at least one or more treatments selected from alkylalkoxysilane treatment, metal soap treatment, acylated amino acid treatment, and organic titanate treatment, more preferably includes at least one or more treatments selected from alkylalkoxysilane treatment, acylated amino acid treatment, and organic titanate treatment, even more preferably includes at least one or more treatments selected from acylated amino acid treatment and organic titanate treatment, and even more preferably includes at least one or more treatments selected from disodium stearoyl glutamate treatment and isopropyl triisostearoyl titanate.

The surface treatment of the color pigment with the surface treatment agent containing an alkyl group having 3 or more carbon atoms can be carried out by a conventional method.
The amount of the surface treatment agent to be used is preferably 0.1 to 20% by mass, more preferably 0.5 to 10% by mass, and even more preferably 1 to 7% by mass, based on the mass of the color pigment.

The color pigment of component (B) can be one type or two or more types, and from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied and improving the adhesion to the skin after application, the content is preferably 1 to 20 mass %, more preferably 2 to 18 mass %, and even more preferably 6 to 13 mass %, of the total composition.
The content of component (B) is the mass of the color pigment after treatment with the surface treatment agent.

In the present invention, the mass ratio (A)/(B) of component (A) to component (B) is preferably 0.003 to 4, more preferably 0.006 to 2, even more preferably 0.008 to 1, and even more preferably 0.009 to 0.5, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin upon application, improving the adhesion to the skin and the ability to cover pores after application, and reducing the sticky feeling.

Component (C) is a non-volatile oil that is liquid at 25°C.
Being liquid at 25° C. means that the viscosity at 25° C. is 10,000 mPa·s or less. Here, the viscosity is measured using a B-type viscometer (TVB-10M, manufactured by Toki Sangyo Co., Ltd.), rotor No. 4, 60 rpm, and 60 seconds.
The term "non-volatile" refers to a material whose evaporation amount at 25° C. for 6 hours is less than 20%, as measured by the following method (1).
Method (1): Place a 90 mm diameter filter paper in a 120 mm diameter glass petri dish, place 1 g of sample on the filter paper, and store in a room (25°C) at 65% RH. After 6 hours, measure the residue of the sample and calculate the amount of evaporation.

The non-volatile oil of component (C) may be any oil that is used in ordinary cosmetics, and examples thereof include linear or branched hydrocarbon oils such as liquid paraffin, liquid isoparaffin, squalane, and squalene; monoester oils such as ethylhexyl paramethoxycinnamate, octyldodecyl myristate, isotridecyl isononanoate, and isononyl isononanoate; diester oils such as neopentyl glycol dicaprate, propylene glycol dicaprate, and diisostearyl malate; triester oils such as glyceryl tri-2-ethylhexanoate and glyceryl tri(caprylic acid/capric acid); tetraester oils such as dipentaerythrityl tetraisostearate; silicone oils such as dimethylpolysiloxane, caprylyl methicone, methylphenylpolysiloxane, methylhydrogenpolysiloxane, and higher alcohol-modified organopolysiloxane; and fluorine oils such as fluoropolyether and perfluoroalkyl ether silicone.
Among these, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin upon application and improving the adhesion to the skin and pore covering power after application, it is preferable to contain at least one or two or more types selected from linear or branched hydrocarbon oils, monoester oils, diester oils, triester oils, tetraester oils, and silicone oils, it is more preferable to contain at least one or two or more types selected from linear or branched hydrocarbon oils, monoester oils, diester oils, and silicone oils, it is even more preferable to contain at least one or two or more types selected from branched hydrocarbon oils, monoester oils, diester oils, and silicone oils, and it is even more preferable to contain at least one or two or more types selected from liquid isoparaffin, ethylhexyl paramethoxycinnamate, methylphenylpolysiloxane, caprylyl methicone, and propylene glycol dicaprate.

One or more types of component (C) may be used, and the content is preferably 0.5 to 35% by mass, more preferably 2 to 25% by mass, even more preferably 5 to 20% by mass, and even more preferably 7 to 17% by mass in the total composition, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied, and improving the adhesion to the skin and the ability to cover pores after application.

The carbonate of component (D) is preferably a bivalent metal carbonate, for example, calcium carbonate, magnesium carbonate, barium carbonate, etc. Among these, from the viewpoint of reducing the slippery feeling of the emulsion composition on the skin when applied, and improving the skin adhesion and pore covering power after application, it is preferable to include at least one or more selected from calcium carbonate and magnesium carbonate, and calcium carbonate is more preferable. In addition, from the viewpoint of reducing the sticky feeling of the skin after application, it is preferable to include at least one or more selected from calcium carbonate and magnesium carbonate, and magnesium carbonate is more preferable.
Furthermore, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied, improving the adhesion to the skin and pore-covering power after application, and reducing the sticky feeling, it is preferable that the emulsion composition contains a combination of calcium carbonate and magnesium carbonate.
The carbonate of component (D) is used alone. When it is used as a surface treatment agent for powder or as a composite powder raw material, the carbonate does not exist alone in the composition, and therefore the effect of the present invention cannot be obtained.

The shape of the carbonate of component (D) is not limited, and may be any of spindle-like, rod-like, spherical, plate-like, needle-like, fibrous, petal-like, and the like.
The shape of the carbonate of component (D) is preferably spindle-shaped, rod-shaped, plate-shaped, needle-shaped, fibrous, or petal-shaped, more preferably spindle-shaped, rod-shaped, plate-shaped, needle-shaped, or fibrous, and even more preferably spindle-shaped, rod-shaped, or plate-shaped, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied, improving the adhesion to the skin and the covering power for pores after application, and reducing a sticky feeling.

In addition, the volume average particle diameter of the carbonate is preferably 0.1 to 50 μm, more preferably 1 to 30 μm, and even more preferably 6 to 20 μm, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied, improving the adhesion to the skin and the covering power for pores after application, and reducing the sticky feeling.
Furthermore, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin during application, improving the adhesion to the skin and the ability to cover pores after application, and reducing a sticky feeling, the particle size (aspect ratio) of the major axis relative to the average thickness of the carbonate is preferably 1 to 100, more preferably 1.3 to 50, and even more preferably 1.6 to 30.
Here, the volume average particle size is measured by a laser diffraction scattering particle size distribution analyzer (LA-920, manufactured by Horiba, Ltd.) In the present invention, the volume average particle size is the average particle size based on volume, and is defined as the 50% median size.
The aspect ratio is calculated from the ratio of the volume average particle diameter to the average thickness of the particles, and is defined as aspect ratio=(volume average particle diameter/average thickness).
The average particle thickness is determined by averaging the thicknesses of 10 to 50 base particles measured by observation with a scanning electron microscope or a transmission electron microscope.

As the carbonate of component (D), commercially available products can be used. For example, calcium carbonate includes light calcium carbonate (manufactured by Omi Chemical Industry Co., Ltd., volume average particle size 7.5 μm, spindle shape, aspect ratio 1.9) and SCS-M5 (manufactured by Sakai Chemical Industry Co., Ltd., volume average particle size 5 μm, spherical shape, aspect ratio 1), and magnesium carbonate includes heavy magnesium carbonate (manufactured by Kyowa Chemical Industry Co., Ltd., volume average particle size 16 μm, plate shape, aspect ratio 26).

One or more types of component (D) may be used, and the content is preferably 0.1 to 10% by mass, more preferably 0.5 to 8% by mass, and even more preferably 1.2 to 5% by mass in the total composition, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied, improving the adhesion to the skin and the ability to cover pores after application, and reducing the sticky feeling.

In the present invention, the mass ratio (B)/(D) of component (B) to component (D) is preferably 0.2 to 100, more preferably 0.5 to 70, even more preferably 0.8 to 35, and even more preferably 1 to 20, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin upon application, improving the adhesion to the skin and the ability to cover pores after application, and reducing the sticky feeling.

In the present invention, the content of water in component (E) is preferably 20 to 80 mass% of the total composition, more preferably 30 to 70 mass%, even more preferably 40 to 60 mass%, and even more preferably 45 to 55 mass%.

The emulsion composition of the present invention may further contain a film-forming agent, which can reduce the slippery feeling of the emulsion composition on the skin when applied and improve the adhesion to the skin after application.
Such film-forming agents include those commonly used in cosmetics, such as fluorine-modified silicone resins, trimethylsiloxysilicate, acrylic silicone resins, and alkylsilsesquioxane resins.

The fluorine-modified silicone resin is represented by the following general formula (1):
R ¹ _g SiO _(4-g)/2 (1)
(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 functional group having a hydroxyl group and the general formula -R ² -Rf as an essential component, and g is an average number in the range of 1.0≦g≦1.8. R ¹ 's may be the same or different.)
Preferably, the compound has a structure represented by the following formula:

As such a fluorine-modified silicone resin, the cosmetic label name "trifluoroalkyldimethyltrimethylsiloxysilicate" (INCI name "Trifluoropropyldimethyl/Trimethylsiloxysilicate") is preferred, and commercially available products such as XS66-B8226 (50% by weight decamethylcyclopentasiloxane solution) and XS66-B8636 (50% by weight dimethylpolysiloxane (10cs) solution) (both manufactured by Momentive Performance Materials) that have been dissolved in a solvent in advance can be used.

Trimethylsiloxysilicate is preferably a compound having a crosslinked structure with a siloxane structure as the main skeleton, and is represented by [(CH ₃ ) ₃ SiO _1/2 ] _S [SiO ₂ ] _T (S is 1 to 3, T is 0.5 to 8).

As trimethylsiloxysilicate, the cosmetic label name "trimethylsiloxysilicate" (INCI name "Trimethylsiloxysilicate") is preferred, and commercially available products such as KF-7312T (60% by weight methyltrimethicone solution), KF-7312L (50% dimethylpolysiloxane (2cs) solution), KF-7312J (50% by weight decamethylcyclopentasiloxane solution), and KF-7312K (50% by weight dimethylpolysiloxane (6cs) solution) (all manufactured by Shin-Etsu Chemical Co., Ltd.) that have been dissolved in advance in a solvent can be used.

Examples of the acrylic silicone resin include vinyl polymers having a carbosiloxane dendrimer structure in the side chain, and acrylic-silicone graft copolymers.
Examples of vinyl polymers having a carbosiloxane dendrimer structure in the side chain include those described in JP-A Nos. 11-1530 and 2000-63225.

As a vinyl-based polymer having a carbosiloxane dendrimer structure in the side chain, a silicone dendrimer-acrylic copolymer is preferred, and the cosmetic display name "(Acrylates/Polytrimethylsiloxymethacrylate) Copolymer" (INCI name "Acrylates/Polytrimethylsiloxymethacrylate Copolymer") is preferred. Commercially available products such as FA4001CM (30% by weight decamethylcyclopentasiloxane solution), FA4002ID (40% by weight isododecane solution), and DOWSIL FA 4003 DM Silicone Acrylate (40% by weight dimethylpolysiloxane (2cs) solution) (all manufactured by Dow-Toray) that have been dissolved in a solvent in advance can be used.

Examples of the acrylic-silicone graft copolymer include those described in JP-A-2-25411.
The acrylic-silicone graft copolymer is preferably one having the cosmetic labeling name "Acrylates/Dimethicone Copolymer" (INCI name "Acrylates/Dimethicone Copolymer"), and commercially available products such as KP545 (30% by mass decamethylcyclopentasiloxane solution), KP549 (40% by mass methyltrimethicone solution), and KP550 (40% by mass isododecane solution) (all manufactured by Shin-Etsu Chemical Co., Ltd.) that have been dissolved in advance in a solvent can be used.

As the alkylsilsesquioxane resin, for example, those described in JP-A-4-312511 can be used. Specifically, it can be obtained by reacting 100 parts by mass of a silanol group-containing organopolysilsesquioxane consisting of R ³ SiO _1.5 units (wherein R ³ represents a substituted or unsubstituted monovalent hydrocarbon group) with 5 to 100 parts by mass of a silicone compound represented by (R ⁴ ₃ Si) _a Z (wherein R ⁴ represents a substituted or unsubstituted monovalent hydrocarbon group, a represents 1 or 2, and Z represents a hydrogen atom, a hydroxyl group or a hydrolyzable group when a is 1, and represents -O-, -N(X)- or -S- when a is 2, where X represents a hydrogen atom, a monovalent hydrocarbon group having 1 to 4 carbon atoms or R ⁴ ₃ Si-), and examples of such silicone resins include those consisting of 50 to 99 mol % of R ³ SiO _1.5 units and 1 to 50 mol % of R ⁴ ₃ SiO _0.5 units.
As the alkylsilsesquioxane resin, the cosmetic display name "polypropylsilsesquioxane cyclopentasiloxane" (INCI name "POLYPROPYLSILSESQUIOXANECYCLOPENTASILOXANE" is preferred. Commercially available products that can be used include, for example, 670FLUID (manufactured by Dow-Toray Industries, Inc.), which is polypropylsilsesquioxane, and DOWSIL MQ-1640 FLAKE RESIN (a mixture of 37% by mass polypropylsilsesquioxane and 63% by mass trimethylsiloxysilicate) (manufactured by Dow-Toray Industries, Inc.), which is a mixture of polypropylsilsesquioxane and trimethylsiloxysilicate, and the like.

From the viewpoint of reducing the slippery feeling of the emulsion composition on the skin when applied and improving the adhesion to the skin after application, the film-forming agent preferably contains at least one or more selected from trimethylsiloxysilicate, acrylic silicone resin, and alkylsilsesquioxane resin, more preferably acrylic silicone resin, and even more preferably vinyl polymer having a carbosiloxane dendrimer structure in the side chain.

One or more types of film-forming agents may be used, and the content is preferably 0.1 to 10% by mass, more preferably 0.5 to 7% by mass, and even more preferably 1.5 to 4% by mass in the total composition, from the viewpoint of reducing the slippery feeling of the emulsion composition on the skin when applied and improving the adhesion to the skin after application.

The emulsion composition of the present invention may further contain an oil agent that is solid or semi-solid at 25°C, which can reduce the slippery feeling of the emulsion composition on the skin when applied and improve the adhesion to the skin and the covering power for pores after application.
Being solid or semi-solid at 25°C means that the viscosity at 25°C is greater than 10,000 mPa·s.
Here, the viscosity is measured using a B-type viscometer (TVB-10 model, manufactured by Toki Sangyo Co., Ltd.), rotor No. 4, 12 rpm, 60 seconds (however, for viscosity of 50,000 mmPa·s or more, rotor No. 4, 3 rpm, 60 seconds).

The oil agent that is solid at 25°C is not limited as long as it is one that is normally used in cosmetics, and ester wax, hydrocarbon wax, etc. can be used. Examples of oil agents that are solid at 25°C and contain ester wax include animal wax and vegetable wax, and examples of oil agents that are solid at 25°C and contain hydrocarbon wax include mineral wax and synthetic wax. More specifically, examples of oil agents that are solid at 25°C and contain ester wax include vegetable waxes such as shea butter, rice bran wax, carnauba wax, candelilla wax, and beeswax, and examples of oil agents that are solid at 25°C and contain hydrocarbon wax include ceresin, paraffin wax, microcrystalline wax, polyethylene wax, and polyolefin wax.

Semi-solid oils at 25°C include cholesterol derivatives such as cholesteryl isostearate, cholesteryl hydroxystearate, cholesteryl macadamia nut oil fatty acid, and N-lauroyl-L-glutamic acid di(cholesteryl, behenyl, octyldodecyl); N-lauroyl-L-glutamic acid di(phytosteryl, behenyl, 2-octyldodecyl), N-lauroyl-L-glutamic acid di(phytosteryl, 2-octyldodecyl), phytosteryl isostearate, phytosteryl oleate, and dimer dilinoleic acid (phytosteryl /isostearyl/cetyl/stearyl/behenyl) and other phytosterol derivatives; dipentaerythritol fatty acid esters such as dipentaerythritol hexaoxystearate and dipentaerythritol rosinate; triglycerides such as tri(caprylic-capric-myristic-stearic acid)glyceride, glyceryl trilanolinate, and glyceryl tribehenate; partially hydrogenated triglycerides such as hardened oils, lanolin, soft lanolin fatty acids, lanosterol derivatives, petrolatum, and hydrogenated castor oil dimer dilinoleate.

The oil agent which is solid or semi-solid at 25°C preferably contains at least one or more selected from vegetable waxes, cholesterol derivatives, phytosterol derivatives, triglycerides, lanolin, petrolatum, and hydrogenated castor oil dimer dilinoleate, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied, improving the adhesion to the skin and the covering power for pores after application, and reducing the sticky feeling,
It is more preferable that the composition contains at least one or more selected from vegetable waxes, cholesterol derivatives, phytosterol derivatives, triglycerides, lanolin, and petrolatum, and further preferable that the composition contains vegetable waxes, phytosterol derivatives, and triglycerides, and further preferable that the composition contains triglycerides.

One or more types of oil agents that are solid or semi-solid at 25°C may be used, and the content is preferably 0.05 to 8% by mass, more preferably 0.06 to 5% by mass, and even more preferably 0.07 to 3% by mass in the total composition, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied, improving the adhesion to the skin and the ability to cover pores after application, and reducing the sticky feeling.

The emulsion composition of the present invention may further contain a volatile oil, which can reduce the slippery feeling of the emulsion composition on the skin when applied.
The term "volatile oil" as used herein refers to oil whose evaporation amount at 25°C for 6 hours is 20% or more, as measured by the following method (1).
Method (1): Place a 90 mm diameter filter paper in a 120 mm diameter glass petri dish, place 1 g of sample on the filter paper, and store in a room (25°C) at 65% RH. After 6 hours, measure the residue of the sample and calculate the amount of evaporation.

The volatile oil may be any oil that is commonly used in cosmetics, and examples of the oil include silicone oil, hydrocarbon oil, and ether oil.
Silicone oils include chain dimethylpolysiloxane and cyclic dimethylpolysiloxane. Chain dimethylpolysiloxane may be either linear or branched, linear ones include dimethylpolysiloxane (1.5cs), dimethylpolysiloxane (2cs), etc., branched ones include methyltrimethicone, tris(trimethylsilyl)methylsilane, tetrakis(trimethylsilyl)silane, etc. Cyclic dimethylpolysiloxanes include octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, etc.
Examples of the hydrocarbon include isododecane, isotridecane, isohexadecane, light isoparaffin, and light liquid isoparaffin. Examples of the ether oil include ethyl perfluorobutyl ether.

Of these, from the viewpoint of reducing the slippery feeling of the emulsion composition on the skin when applied, it is preferable to include at least one or more types selected from silicone oil and hydrocarbon oil, more preferably at least one or more types selected from dimethylpolysiloxane (2cs), decamethylcyclopentasiloxane, isododecane, and light liquid isoparaffin, and even more preferably at least one or more types selected from dimethylpolysiloxane (2cs), decamethylcyclopentasiloxane, and light liquid isoparaffin.

One or more types of volatile oils may be used, and the content is preferably 1 to 30% by mass, more preferably 3 to 20% by mass, and even more preferably 5 to 15% by mass, of the total composition from the viewpoint of reducing the slippery feeling of the emulsion composition on the skin when applied.

The emulsion composition of the present invention may further contain a silicone-based surfactant, which reduces the slippery feeling of the emulsion composition on the skin when applied and improves the adhesion to the skin after application, making it possible to obtain a stable emulsion composition.
As the silicone-based surfactant, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied, improving the adhesion to the skin after application, and obtaining a stable emulsion composition, the HLB is preferably from 1 to 8, more preferably from 2 to 7, and even more preferably from 3 to 6.
Here, HLB (Hydrophilic-Lipophilic Balance) indicates the molecular weight of the hydrophilic group portion in the total molecular weight of the surfactant, and is calculated by Griffin's formula. When a surfactant is composed of two or more nonionic surfactants, the HLB of the mixed surfactant is calculated as follows. The HLB of the mixed surfactant is the phase arithmetic average of the HLB values of the individual nonionic surfactants based on their blending ratio.
Mixed HLB=Σ(HLBx×Wx)/ΣWx
HLBx indicates the HLB value of nonionic surfactant X.
Wx represents the mass (g) of the nonionic surfactant X having a value of HLBx.

The silicone-based surfactant may be any that is used in ordinary cosmetics, and examples thereof include silicone-based surfactants such as linear or branched polyether-modified silicones such as polyoxyethylene-methylpolysiloxane copolymers and poly(oxyethylene-oxypropylene)methylpolysiloxane copolymers, alkyl-modified polyether-modified silicones, and alkyl-chain-co-modified polyether-modified silicones.
As the silicone-based surfactant, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied, improving the adhesion to the skin after application, and obtaining a stable emulsion composition, linear or branched-chain polyether-modified silicones and alkyl-modified polyether-modified silicones are preferred, linear or branched-chain polyether-modified silicones are more preferred, and linear polyether-modified silicones are even more preferred.
One or more types of silicone-based surfactants can be used, and the content is preferably 1 to 8 mass %, more preferably 2 to 6.5 mass %, and even more preferably 3 to 5.5 mass %, from the viewpoints of reducing the slippery feeling of the emulsion composition on the skin when applied, improving the adhesion to the skin after application, and obtaining a stable emulsion composition.

In addition to the above-mentioned components, the emulsion composition of the present invention may contain components that are usually used in cosmetics, such as extender pigments such as talc, powders other than those mentioned above, polymeric compounds, antioxidants, fragrances, preservatives, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, germicides, skin activators, moisturizers, and cooling agents.

The emulsion composition of the present invention can be produced according to a conventional method, and can be either a water-in-oil type emulsion composition or an oil-in-water type emulsion composition. It can also be in the form of a liquid, emulsion, paste, cream, gel, solid, etc., with paste, cream, and solid being preferred.

The emulsion composition of the present invention is preferably applied as a water-in-oil emulsion cosmetic, and can be applied as makeup cosmetics such as a makeup base, foundation, concealer, blusher, eye shadow, mascara, eyeliner, eyebrow, overcoat agent, and lipstick; and ultraviolet protection cosmetics such as a sunscreen lotion and sunscreen cream. It is suitable as a makeup cosmetic.

Examples 1 to 11 and Comparative Example 1
Water-in-oil emulsion cosmetics having the compositions shown in Tables 1 and 2 were prepared and evaluated for the lack of slippery feeling when applied, the adhesion to the skin after application, the ability to cover pores, and the lack of stickiness on the skin after application. The results are shown in Tables 1 and 2.

(Production method)
Components (A), (C) and other oily components were heated and stirred at 80°C to prepare an oil phase mixture, and a powder phase containing components (B), (D) and other powders that had been previously ground and mixed was added to the oil phase mixture and mixed using a homomixer. Thereafter, an aqueous phase heated to 80°C was added, mixed, and then cooled to room temperature to obtain a water-in-oil emulsion cosmetic.

(Evaluation Method)
(1) No slippery feeling when applied:
Three expert evaluators took 0.3 g of each water-in-oil emulsion cosmetic on their fingers and applied it to the face, and evaluated the lack of slippery feeling during application according to the following criteria. The results were shown as the total score given by the three expert evaluators.
The "slippery feeling" refers to the feeling that when a water-in-oil emulsion cosmetic is applied to the face using a fingertip or the like, it continues to spread on the skin as if a liquid oil were being spread, and there is no real feeling that the water-in-oil emulsion cosmetic is spreading while adhering to the skin.
5: There is clearly no sense of slippery skin.
4: There is almost no slippage.
3: I don't feel like it slides much on the skin.
2: There is a slight feeling of slippery skin.
1: There is a clear feeling of slipping upwards.

(2) Adhesion to skin after application:
Three expert evaluators took 0.3 g of each water-in-oil emulsion cosmetic on their fingers, applied it to the face, and then evaluated the adhesion of the product to the skin after application according to the following criteria. The results were shown as the total score given by the three expert evaluators.
The term "tight adhesion" refers to the fact that the water-in-oil emulsion composition on the skin after application follows the movement of the skin and does not come off from the surface of the skin even when the facial skin is moved, for example by changing facial expressions, and that the composition adheres firmly to the skin without gathering in parts due to large or small wrinkles.
5: There is a clear feeling of adhesion.
4: I feel like it adheres very well.
3: I feel a sense of close contact.
2: I feel like it doesn't adhere well.
1: There is a clear lack of adhesion.

(3) Pore coverage:
Three expert evaluators took 0.3 g of each water-in-oil emulsion cosmetic on their fingers, applied it to the face, spread it, and then evaluated its pore-covering ability according to the following criteria. The results were shown as the total score given by the three expert evaluators.
5: I feel like my pores are clearly hidden.
4: I feel like my pores are hidden.
3: I feel like my pores are almost completely hidden.
2: I feel like my pores are not hidden very well.
1: I feel like my pores are not clearly hidden.

(4) No stickiness on skin after application:
Three expert evaluators took 0.3 g of each water-in-oil emulsion cosmetic on their fingers, applied it to the face, and then touched the skin after application to evaluate the lack of stickiness according to the following criteria. The results were shown as the total score of the three expert evaluators.
5: There is clearly no stickiness.
4: There is almost no stickiness.
3: It doesn't feel very sticky.
2: It feels a little sticky.
1: Stickiness is clearly felt.

*1: Sorbitan monoisostearate: Croda, Span 120,
*2: Polyoxyethylene-methylpolysiloxane copolymer: Shin-Etsu Chemical Co., Ltd., KF-6017,
*3: 2-ethylhexyl paramethoxycinnamate: manufactured by BASF Corporation, Uvinal MC80,
*4: Methylphenylpolysiloxane: Dow Toray, DOWSIL FZ-209,
* 5: Dimethylpolysiloxane (2cs): Shin-Etsu Chemical Co., Ltd., KF-96L-2cs,
*6: Light liquid isoparaffin: NOF Corp., Pearleem 4,
* 7: (Acrylates / polytrimethylsiloxy methacrylate) copolymer / dimethicone mixture: Dow Toray, DOWSIL FA 4003 DM Silicone Acrylate (40% by mass dimethicone (2cs) solution),
*8: Glyceryl tribehenate: Synchrowax HR-C, manufactured by Croda
*9: Dimethicone/Stearoyl Glutamic Acid Disodium Complex Treated Titanium Oxide: SA/NAI-TR-10 MIBRID COLOR POWDER, manufactured by Miyoshi Chemical Industries, Ltd.
*10: Dimethicone / stearoyl glutamate 2Na composite treated red iron oxide: manufactured by Miyoshi Kasei Co., Ltd., SA / NAI-R-10 MIBRID COLOR POWDER,
*11: Dimethicone / stearoyl glutamate 2Na composite treated yellow iron oxide: SA / NAI-Y-10 MIBRID COLOR POWDER, manufactured by Miyoshi Chemical Industry Co., Ltd.
*12: Dimethicone / stearoyl glutamic acid 2Na composite treated black iron oxide: manufactured by Miyoshi Kasei Co., Ltd., SA / NAI-B-10 MIBRID COLOR POWDER,
* 13: Dimethicone / stearoyl glutamate 2Na composite treated talc: SA / NAI-TA-46R MIBRID COLOR POWDER, manufactured by Miyoshi Chemical Industries, Ltd.
* 14: Amino acid / titanate composite treated titanium oxide: Daito Kasei Kogyo Co., Ltd., ASI treated titanium oxide (titanium oxide (approximately spherical, average particle size 0.2 μm) 98% by mass, coated with 1.5% by mass of isopropyl triisostearoyl titanate, 0.42% by mass of sodium lauroyl aspartate, and 0.08% by mass of zinc chloride),
* 15: Amino acid / titanate composite treated red iron oxide: manufactured by Daito Kasei Kogyo Co., Ltd., ASI treated red iron oxide (iron oxide (needle-shaped, average particle diameter (length) 0.9 μm, average width 0.08 μm) 98% by mass, coated with 1.5% by mass of isopropyl triisostearoyl titanate, 0.42% by mass of sodium lauroyl aspartate, and 0.08% by mass of zinc chloride),
* 16: Amino acid / titanate composite treated yellow iron oxide: ASI treated yellow iron oxide (coated in the same manner as * 15), manufactured by Daito Kasei Kogyo Co., Ltd.
* 17: Amino acid / titanate composite treated black iron oxide: Daito Kasei Kogyo Co., Ltd., ASI treated black iron oxide (coated in the same manner as * 15),
* 18: Amino acid / titanate composite treated talc: Daito Kasei Kogyo Co., Ltd., ASI treated talc,
* 19: Dimethicone-treated silica: Miyoshi Chemical Industry Co., Ltd., A-SB-300 (7%),
*20: Calcium carbonate: Omi Chemical Industry Co., Ltd., light calcium carbonate (volume average particle size 7.5 μm, spindle shape, aspect ratio 1.9)
* 21: Calcium carbonate: Sakai Chemical Industry Co., Ltd., SCS-M5, (volume average particle size 5 μm, spherical, aspect ratio 1)
* 22: Magnesium carbonate: Kyowa Chemical Industry Co., Ltd., heavy magnesium carbonate (volume average particle size 16 μm, plate-like, aspect ratio 26)

Claims (3)

The following components (A), (B), (C), (D) and (E):
(A) sorbitan fatty acid ester,
(B ) a color pigment treated with at least one surface treatment agent selected from an acylated amino acid treatment and an organic titanate treatment ;
(C) a non-volatile oil that is liquid at 25°C;
(D) carbonate,
(E) containing water ,
The mass ratio (B)/(D) of the component (B) to the component (D) is 1 to 20;
Water-in-oil emulsion composition. 2. The water-in-oil emulsion cosmetic according to claim 1 , wherein the component (D) comprises at least one or more carbonates selected from calcium carbonate and magnesium carbonate. 3. The water-in-oil emulsion composition according to claim 1 , wherein the mass ratio (A)/(B) of component (A) to component (B) is 0.003 to 4.