HK1170947B

HK1170947B - W/o emulsion cosmetic

Info

Publication number: HK1170947B
Application number: HK12111811.0A
Authority: HK
Inventors: 福井崇; 川田贵史; 井下美绪
Original assignee: 花王株式会社
Priority date: 2009-11-25
Filing date: 2010-11-25
Publication date: 2015-07-10

Description

W/O type emulsified cosmetic

Technical Field

The present invention relates to a W/O type emulsion cosmetic.

Background

Conventionally, for protection against ultraviolet rays, organic ultraviolet absorbers capable of efficiently absorbing ultraviolet rays and ultraviolet protection powders capable of scattering ultraviolet rays have been used. Titanium dioxide or zinc oxide is often used as the ultraviolet ray protection powder, but it is necessary to blend a large amount of titanium dioxide or zinc oxide in cosmetics for the purpose of protecting against ultraviolet rays. Therefore, there are problems that the skin becomes white when coated with the powder, and that the powder has a dry feeling peculiar to the powder and the feeling of touch is deteriorated.

In order to suppress the dry feeling when applied to the skin, for example, cosmetics have been studied in which the surface treatment of pigments is performed to suppress the decrease in oil absorption and to minimize the degreasing by sebum on the skin, thereby reducing the burden on the skin and improving the durability, water resistance, sebum resistance, touch feeling, transfer prevention effect, and color development of the cosmetics (patent document 1, patent document 2, and patent document 3).

However, even when such a surface-treated pigment is used, the dry feeling cannot be sufficiently suppressed, and high moisture retention cannot be obtained.

Documents of the prior art

Patent document

Patent document 1: japanese unexamined patent publication No. 2005-2076

Patent document 2: japanese unexamined patent application publication No. 2005-2077

Patent document 3: japanese unexamined patent application publication No. 2005-2078

Disclosure of Invention

The present invention provides a W/O type emulsion cosmetic, which contains the following components (A), (B), (C) and (D):

(A) 1 to 20 wt% of a plate-like powder subjected to surface treatment with an alkylalkoxysilane;

(B) 0.1 to 10 wt.% of an oil which is solid at 25 ℃;

(C) 0.5 to 60 wt.% of an oil having a viscosity of 500,000mPas or less at 25 ℃ and selected from hydrocarbon oils, ester oils and ether oils;

(D) the amount of water is controlled by the amount of water,

and the weight ratio of the components (A) and (B) is (B)/(A) = 0.01-5.

ADVANTAGEOUS EFFECTS OF INVENTION

The W/O emulsion cosmetic of the present invention can give a uniform, smooth and highly occlusive film, and has excellent moisture retention and a good feel in use. Further, the ultraviolet ray protection effect is high.

Detailed Description

The present invention relates to a cosmetic which has no dry feeling and is excellent in moisture retention. Further, it relates to a cosmetic having a high ultraviolet protection effect.

The present inventors have found that a W/O emulsion cosmetic which can form a film having high occlusion properties on the skin surface, has excellent moisture retention properties, gives a good feeling in use, and has a high ultraviolet protection effect can be obtained by using a plate-like powder surface-treated with an alkylalkoxysilane and an oil which is solid at 25 ℃.

The component (A) used in the present invention is a plate-like powder surface-treated with an alkylalkoxysilane, and preferably has an average particle diameter of 0.1 to 10 μm, more preferably 0.2 to 1 μm; and has a plate ratio (average particle diameter/thickness) of 3 or more, preferably 5 to 45, and particularly preferably 10 to 45. The average particle diameter is represented by the sum average of the major axis and the minor axis of the flat smooth surface of the plate, and is calculated from the results of measurement of 20 arbitrary particles in an arbitrary visual field in a transmission electron micrograph. Similarly, the average particle thickness was calculated from the results of measuring 20 particles in an arbitrary field of view in the same field of view of the transmission electron micrograph.

In the component (a), examples of the treated plate-like powder include plate-like zinc oxide, plate-like titanium dioxide, plate-like cerium oxide, plate-like barium sulfate, talc, mica, plate-like kaolin, sericite, muscovite, plate-like synthetic mica, phlogopite, erythromica, biotite, lepidolite, plate-like anhydrous silicic acid, plate-like hydroxyapatite, bentonite, montmorillonite, hectorite, plate-like ceramic powder, plate-like aluminum oxide, plate-like boron nitride, plate-like polymethyl methacrylate powder, lauroyl lysine, plate-like iron oxide, titanium dioxide-coated mica, titanium dioxide-treated mica, bismuth oxychloride, titanium dioxide-coated talc, fish scale foil, titanium dioxide-coated colored mica, and aluminum. Among these, zinc oxide, titanium dioxide, and cerium oxide are preferable from the viewpoint of the ultraviolet protection effect, and among these, zinc oxide is more preferable. More preferably zinc oxide containing iron as a trace element.

The alkylalkoxysilane used for treating such a plate-like powder preferably has a branched or linear alkyl group having 6 to 20 carbon atoms, further 6 to 10 carbon atoms, and particularly 8 carbon atoms; and an alkylalkoxysilane having an alkoxy group with 1 to 2 carbon atoms, and further having 2 carbon atoms, and further preferably octyltriethoxysilane and octyltrimethoxysilane. Such compounds can treat the powder more uniformly.

The method of treating the plate-like powder with the alkylalkoxysilane is not limited, and can be performed by, for example, a wet method, a dry method, an evaporation method (a method of depositing a treatment agent on a pigment using plasma or the like), a gas phase method (a method of performing surface treatment in a gas such as air or nitrogen), a mechanochemical method (a method of performing surface treatment by using a machine such as a ball mill, Angmill (manufactured by hosokawamicon corporation), or a mixer (Hybridizer) (manufactured by naugh mechanical manufacturers), or the like.

The wet method is a method in which a plate-like powder and an alkylalkoxysilane are mixed in an organic solvent such as a lower alcohol, hexane, acetone, toluene, cyclohexane, xylene, dimethylformamide, N-methylpyrrolidone, carbon dioxide, or terpenes, and the mixture is uniformly mixed, and then the organic solvent is removed by heating or reduced pressure, and the heating treatment is preferably performed at 80 to 250 ℃.

The amount of the alkylalkoxysilane to be treated is preferably 2 to 10% by weight, and particularly preferably 2 to 7% by weight, based on the total weight of the plate-like powder to be treated.

The component (a) may be used in 1 or more species, but is preferably contained in an amount of 1 to 20% by weight, more preferably 3 to 15% by weight, and still more preferably 5 to 15% by weight in the total composition, from the viewpoint of forming a homogeneous coating film by combining with an oil which is solid at 25 ℃ as the component (B) described later.

The component (B) used in the present invention is an oil which is solid at 25 ℃, and examples thereof include aliphatic alcohols, fatty acids, aliphatic amide derivatives, and aliphatic amine derivatives.

The aliphatic alcohol is preferably a saturated aliphatic alcohol having 12 to 24 carbon atoms such as lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, and the like. The fatty acid is preferably a saturated fatty acid having 12 to 24 carbon atoms, such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, or the like. Preferred aliphatic amide derivatives are ceramides such as type I to type VI natural ceramides, N- (2-hydroxy-3-hexadecyloxypropyl) -N-2-hydroxyethyl hexadecylamide, and N- (2-hydroxy-3-hexadecyloxypropyl) -N-2-hydroxyethyl decanoamide, and the like. The aliphatic amine derivative is preferably sphingosine such as sphingosine, sphinganine, phytosphingosine, dehydrosphingosine, dehydrophytosphingosine, sphingodienol (sphingodienine), and its N-methyl form or N, N-dimethyl form; 1- (2-hydroxyethylamino) -3-isostearoxy-2-propanol, and the like. In addition, sterols such as cholesterol, stigmasterol, ergosterol, and the like may also be used.

In addition, natural and synthetic waxes such as hydrocarbons, esters, and silicones can be used. For example, animal waxes such as beeswax and spermaceti; vegetable waxes such as carnauba wax, candelilla wax, rice bran wax, and wood wax; mineral waxes such as montan wax, ozokerite wax, ceresin wax, paraffin wax (paraffin wax), and microcrystalline wax; synthetic waxes such as polyethylene wax, fischer-tropsch wax, hydrogenated castor oil, hydrogenated jojoba oil, stearic acid amide, phthalic anhydride imide, and silicone wax.

The component (B) does not contain an organic ultraviolet absorber.

The component (B) can form a uniform film on the skin surface by binding the component (a). The component (B) may be used in an amount of 1 or more, and is contained in an amount of 0.1 to 10% by weight, preferably 0.1 to 5% by weight, and more preferably 0.5 to 5% by weight, based on the total composition, from the viewpoint of film formability.

In the present invention, the weight ratio of the component (a) to the component (B) is (B)/(a) =0.01 to 5, preferably 0.02 to 1, and more preferably 0.1 to 1.

It is considered that when the weight ratio of the component (a) to the component (B) is within this range, the size of water droplets in the W/O emulsion cosmetic can be reduced, and a film having high occlusion properties can be uniformly formed on the skin, and thus high moisture retention can be obtained. Further, it is considered that the silicone-treated powder and the fluorine-treated powder which have been conventionally used frequently have a problem that a coating film having such a blocking property is not formed and a feeling of touch such as a dry feeling is caused.

The component (C) is an oil which is liquid at 25 ℃, has a viscosity at 25 ℃ of more than 0 and 500,000mPas or less, preferably 100,000mPas or less, and more preferably 5 to 1,000 mPas, and is an oil selected from hydrocarbon oils, ester oils, and ether oils.

In the present invention, the viscosity is a value measured using a Brookfield type (B type) viscometer.

Specific examples thereof include hydrocarbon oils such as mobile paraffin, mobile isoparaffin, hydrogenated polyisobutene, heavy mobile isoparaffin, vaseline, squalane, n-octane, n-heptane, isododecane, and cyclohexane; ester oils such as diisostearyl malate, octyldodecyl lactate, isotridecyl isononanoate, octyldodecyl myristate, isopropyl palmitate, isopropyl isostearate, butyl stearate, myristyl myristate, isopropyl myristate, octyldodecyl myristate, di-2-ethylhexanol adipate, diisopropyl sebacate, neopentyl glycol didecanoate, and trihexyl; ether oils such as dioctyl ether, ethylene glycol monolauryl ether, ethylene glycol dioctyl ether, and glycerol monooleyl ether.

The component (C) does not contain an organic ultraviolet absorber such as 2-ethylhexyl p-methoxycinnamate.

The component (C) may be used in an amount of 1 or more, and is contained in an amount of 0.5 to 60% by weight, preferably 0.5 to 40% by weight, and more preferably 5 to 30% by weight, based on the total composition, from the viewpoint of easiness of compatibility with the skin at the time of application.

The weight ratio of the component (B) to the component (C) is (B)/(C) =0.0025 to 2, more preferably 0.01 to 1, and particularly preferably 0.1 to 0.2, from the viewpoints of solubility of the component (B), appropriately suppressing crystallization of the component (B), improving adhesion to the component (a), and forming a coating film having a high occlusion feeling.

The water as the component (D) is the balance of other components, and is preferably contained in an amount of 10 to 60% by weight, more preferably 20 to 50% by weight, based on the total composition, from the viewpoint of excellent moisture retention and refreshing feeling.

Further, in the present invention, from the viewpoint of suppressing stickiness at the time of coating, (E) silicone oil is preferably used in combination with the oil of the component (C).

The silicone oil is an oil that is liquid at 25 ℃ as in the component (C), and is preferably an oil having a viscosity at 25 ℃ of more than 0 and not more than 500,000mPas, and further not more than 100,000mPas, and examples thereof include dimethylpolysiloxane, cyclic dimethylpolysiloxane, methylphenylpolysiloxane, amino-modified silicone, epoxy-modified silicone, carboxyl-modified silicone, alcohol-modified silicone, and alkyl-modified silicone.

Among them, dimethylpolysiloxane and cyclic dimethylpolysiloxane are preferable.

The component (E) may be used in 1 or more, and is preferably contained in an amount of 5 to 50% by weight, and further 10 to 40% by weight, in the total composition, because a feeling of use for suppressing stickiness is obtained.

The total content of the component (C) and the component (E) is preferably 10 to 80% by weight, more preferably 20 to 60% by weight, based on the total composition, because the feeling of use is excellent.

Further, the weight ratio of the component (C) to the component (E) is (C)/(E) =0.005 to 5, and further 0.01 to 3, which is preferable because the formability of the coating film composed of the components (a) and (B) can be improved and a higher moisturizing effect can be obtained.

The cosmetic of the present invention may further contain (F) a nonionic surfactant having an HLB of 8 or less, preferably an HLB of 4 to 8, and more preferably an HLB of 4 to 5. Herein, HLB is a Balance between hydrophilicity and lipophilicity (Hydrophile-Lipophile Balance), and is defined by the following formula in, for example, micropositioner.

HLB = (∑ inorganic value/∑ organic value) × 10

Examples of such nonionic surfactants include sorbitan fatty acid esters (e.g., sorbitan monoisostearate, sorbitan monooleate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, sorbitan trioleate, etc.), glycerin fatty acid esters (e.g., glycerin monostearate, glycerin monoisostearate, glycerin distearate, glycerin monostearate, etc.), polyglycerin fatty acid esters (e.g., diglycerin monostearate, hexa-polyglycerin tristearate, etc.), propylene glycol/pentaerythritol fatty acid esters (e.g., propylene glycol monostearate, pentaerythritol stearate, etc.), polyethylene glycol fatty acid esters (e.g., POE (4) monostearate, POE (2) monooleate, etc.), polyoxyethylene alkyl ethers (e.g., POE (2) hexadecyl ether, POE (5) behenyl ether, POE (3) octylphenyl ether, and the like), polyoxyethylene castor oil/hydrogenated castor oil (for example, POE (3) castor oil, POE (5) hydrogenated castor oil, and the like), a silicone chain as a modified silicone is a linear, branched, or crosslinked type (for example, polyether-modified silicone, polyether-alkyl co-modified silicone, polyglycerol-alkyl co-modified silicone, and the like), sucrose fatty acid ester, and the like.

The component (F) may be used in an amount of 1 or more, and is preferably contained in an amount of 0.1 to 20% by weight, more preferably 0.5 to 10% by weight, and still more preferably 1 to 2.5% by weight, based on the total composition, from the viewpoints of improving the stability of the emulsion cosmetic over time, further improving the dispersibility of the component (B) in the components (C) and (E), and improving the adhesion of the components (a) and (B) during the coating and drying processes.

Further, the cosmetic of the present invention may contain an organic ultraviolet absorber that absorbs in the UVA region, and may further improve the ultraviolet protection effect and moisture retention.

Any of oil-soluble and water-soluble compounds can be used as the related compound, and oil-soluble compounds are more preferable in view of obtaining higher effects in the present invention.

Examples of the oil-soluble compound include diethylamino hydroxybenzoyl hexyl benzoate, tert-butyl methoxydibenzoylmethane, bis-ethylhexyloxyphenol methoxyphenyl triazine, and the like.

Examples of the water-soluble ultraviolet absorber include phenylene-1, 4-bis (2-benzimidazolyl) -3,3 '-5, 5' -tetrasulfonic acid and salts thereof.

The compound may be used in 1 or more species, and is preferably contained in an amount of 0.1 to 10% by weight, more preferably 0.5 to 5% by weight, based on the total composition, from the viewpoint of stable blending and obtaining a sufficient ultraviolet protection effect.

In the W/O type emulsion cosmetic of the present invention, preferable ranges of the respective components are further preferably used in combination.

Preferably, the W/O type emulsion cosmetic of the present invention comprises:

(A) 1 to 20 wt% of a plate-like powder having an average particle diameter of 0.1 to 10 μm which is surface-treated with an alkylalkoxysilane,

preferably 1 to 20% by weight of a plate-like powder having an average particle diameter of 0.1 to 10 μm selected from zinc oxide, titanium oxide and cerium oxide surface-treated with alkylalkoxysilane,

more preferably 1 to 20% by weight of a plate-like powder having an average particle diameter of 0.1 to 10 μm selected from zinc oxide, titanium oxide and cerium oxide surface-treated with octyltriethoxysilane or octyltrimethoxysilane,

(B) 0.1 to 10 wt.% of an oil which is solid at 25 ℃;

(D) the amount of water is controlled by the amount of water,

and the weight ratio of the components (A) and (B) is (B)/(A) = 0.01-5.

Further, the W/O type emulsion cosmetic of the present invention preferably contains:

(A) 1 to 20 wt% of plate-like powder having an average particle diameter of 0.1 to 10 μm which is surface-treated with alkylalkoxysilane;

(B) 0.1-10 wt% of an oil that is a solid at 25 ℃, wherein the oil is selected from: ceramides selected from the group consisting of natural ceramides of types I-VI, N- (2-hydroxy-3-hexadecyloxypropyl) -N-2-hydroxyethyl hexadecanamide, and N- (2-hydroxy-3-hexadecyloxypropyl) -N-2-hydroxyethyl decanamide, and the like; and sterols selected from cholesterol, stigmasterol, ergosterol,

(D) the amount of water is controlled by the amount of water,

and the weight ratio of the components (A) and (B) is (B)/(A) = 0.01-5.

(B) 0.1 to 10 wt.% of an oil which is solid at 25 ℃;

(D) water;

(E) 5 to 50% by weight of a silicone oil,

and the weight ratio of the components (A) and (B) is (B)/(A) = 0.01-5.

More preferably, the W/O type emulsion cosmetic of the present invention contains:

(B) 1-20% by weight of an oil that is a solid at 25 ℃;

(D) water;

(E) 5-50 wt% of silicone oil;

(F) 0.1 to 20% by weight of a nonionic surfactant having an HLB of 4 to 8,

and the weight ratio of the components (A) and (B) is (B)/(A) = 0.01-5.

(A) 1 to 20% by weight of a plate-like powder having an average particle diameter of 0.1 to 10 μm selected from zinc oxide, titanium oxide and cerium oxide surface-treated with octyltriethoxysilane or octyltrimethoxysilane,

(B) 1 to 20 wt.% of a ceramide selected from the group consisting of natural ceramides of types I to VI, N- (2-hydroxy-3-hexadecyloxypropyl) -N-2-hydroxyethyl hexadecanamide and N- (2-hydroxy-3-hexadecyloxypropyl) -N-2-hydroxyethyl decanamide, and the like;

(D) water;

(E) 5-50 wt% of dimethyl polysiloxane and cyclic silicone oil;

(F) 0.1 to 20% by weight of a nonionic surfactant having an HLB of 4 to 8,

the weight ratio of the component (A) to the component (B) is (B)/(A) = 0.01-5.

Further, the W/O type emulsion cosmetic of the present invention is preferably:

the content of the component (A) is 1 to 20% by weight, preferably 3 to 15% by weight;

the content of the component (B) is 0.1 to 10% by weight, preferably 0.1 to 5% by weight;

the content of the component (C) is 0.5 to 60% by weight, preferably 0.5 to 40% by weight;

the content of the component (D) is the balance of other components;

the content of the component (E) is 5 to 50% by weight, preferably 10 to 40% by weight;

the content of the component (F) is 1 to 20% by weight, preferably 0.5 to 10% by weight;

the weight ratio of the components (A) and (B) is (B)/(A) = 0.01-5, preferably 0.02-1;

the weight ratio of the components (B) and (C) is (B)/(C) =0.0025 to 2, preferably 0.01 to 1;

the total content of the components (C) and (E) is (C) + (E) =10 to 80% by weight, preferably 20 to 60% by weight;

the weight ratio of the components (C) and (E) is (C)/(E) =0.005 to 5, preferably 0.01 to 3.

(A) 3 to 15 wt% of plate-like powder having an average particle diameter of 0.1 to 10 μm which is surface-treated with alkylalkoxysilane;

(B) 0.1 to 5 wt.% of an oil which is solid at 25 ℃;

(C) 0.5 to 40 wt% of an oil having a viscosity of 500,000mPas or less at 25 ℃ and selected from hydrocarbon oils, ester oils and ether oils;

(D) the amount of water is controlled by the amount of water,

the weight ratio of the components (A) and (B) is (B)/(A) = 0.02-1.

(B) 0.1 to 5 wt.% of an oil which is solid at 25 ℃;

(D) water;

(E) 10-40 wt% of silicone oil;

(F) 0.5 to 10 wt% of a nonionic surfactant having an HLB of 4 to 8,

the weight ratio of the components (A) and (B) is (B)/(A) = 0.02-1.

(B) 0.1 to 5 wt.% of an oil which is solid at 25 ℃;

(D) water;

(E) 10-40 wt% of silicone oil;

(F) 0.5 to 10 wt% of a nonionic surfactant having an HLB of 4 to 8,

wherein the weight ratio of the components (A) and (B) is (B)/(A) =0.02 to 1,

the weight ratio of the components (B) and (C) is preferably (B)/(C) =0.01 to 1,

the total content of the components (C) and (E) is (C) + (E) = 20-60 wt%,

the weight ratio of the components (C) and (E) is (C)/(E) = 0.01-3.

The cosmetic of the present invention may contain, in addition to the above components, other components usually used in cosmetics. Examples of the active ingredients include lower alcohols, moisturizers, chelating agents, whitening agents, vitamins, various other active ingredients, powders other than the above, ultraviolet absorbers other than the above, antioxidants, perfumes, preservatives, pH adjusters, metal ion blocking agents, bactericides, coloring materials, and the like.

The W/O type emulsion cosmetic of the present invention can be produced by a conventional method.

Examples

Production example 1 (production of plate-shaped Zinc oxide)

Zinc sulfate 1.6X 10^-1mol, sodium sulfate 3.8X 10^-2mol and ferrous sulfate as salt of trace elements 1.6X 10^-4mol dissolved in 5X 10^-2315ml of mol sulfuric acid aqueous solution.

Next, this solution was stirred at 6000r.p.m. with an emulsification homogenizer (homomixer), while 230mL of a 2N aqueous sodium hydroxide solution (pH = 12.8) was added over 15 seconds, and after a precipitate was generated, stirring was continued for 10 minutes. Then, the plate-like zinc oxide was aged at 100 ℃ for 90 minutes, filtered, washed with water, and dried at 230 ℃ for about 10 hours to obtain plate-like zinc oxide. The powder thus obtained was observed with a scanning electron microscope, and was confirmed to be flaky particles. The average particle diameter of the obtained powder was 0.25. mu.m, and the plate ratio was 13.

Production example 2 (production of octylsilylated platy Zinc oxide)

A slurry composed of 93% by weight of the plate-like zinc oxide obtained in production example 1, 7% by weight of octyltriethoxysilane, and toluene was prepared, and pulverization were carried out using a bead Mill (Beads Mill) (manufactured by Shinmaru enterprises Corporation, Dinomill). Subsequently, toluene was distilled off by heating under reduced pressure, and then the mixture was heat-treated at 150 ℃ for 4 hours by using a blast-type dryer to obtain octylsilylated tabular zinc oxide powder.

The powder thus obtained was observed with a scanning electron microscope, and was confirmed to be flaky particles. The average particle diameter of the obtained powder was 0.20. mu.m, and the plate ratio was 10.

Production example 3 (production of Silicone-treated plate-shaped Zinc oxide)

A slurry composed of 98 parts by weight of the plate-like zinc oxide powder obtained in production example 1, 2 parts by weight of methylhydrogenpolysiloxane (KF-99P, manufactured by shin-Etsu chemical industries Co., Ltd.) and isopropyl alcohol was prepared, and after sufficient stirring and pulverization, the solvent was distilled off by heating under reduced pressure, and heat-treated in air at 150 ℃ for 4 hours to obtain silicone-treated plate-like zinc oxide.

Production example 4 (production of octylsilylated talc)

A slurry composed of 98% by weight of talc powder (FK-500S, manufactured by Shankou mica industries Co., Ltd.) and 2% by weight of octyltriethoxysilane and toluene was prepared, and pulverization and crushing were performed using a bead mill (manufactured by Shinmau Enterprises Corporation, Dinomill). Subsequently, toluene was distilled off by heating under reduced pressure, and then the mixture was heat-treated at 150 ℃ for 4 hours by using a blowing air dryer to obtain octylsilylated talc powder.

The powder thus obtained was observed with a scanning electron microscope, and was confirmed to be flaky particles. The average particle diameter of the obtained powder was 10 μm, and the plate ratio was 45.

Examples 1 to 2 and comparative examples 1 to 8

The W/O type emulsion cosmetics having the composition shown in table 1 were produced by the following method, and the obtained cosmetics were evaluated for uv ray protection effect, moisture evaporation rate and non-dry feeling, and the results are shown in table 1.

As a result, the cosmetic of the present invention has a high uv protection effect and excellent moisture retention properties by using the plate-like powder surface-treated with alkylalkoxysilane and the oil that is solid at 25 ℃.

(production method)

Mixing the solid oil of component (B), the oil of component (C), the nonionic surfactant of component (F), and the ultraviolet absorbent, and dissolving at 80 deg.C. The obtained oil phase was transferred to a vacuum emulsifier (Agi homo mixer), cooled to room temperature, added to a powder phase obtained by uniformly dispersing powder of the component (a) in a mixed solution of the component (E) methylpolysiloxane, a copolymer of N-propionyl polyethyleneimine and methylpolysiloxane, and ethanol, stirred, further added to an aqueous phase containing a polyhydric alcohol, stirred at high speed in the vacuum emulsifier, and degassed, thereby obtaining a W/O type emulsified cosmetic.

(evaluation method)

(1) Ultraviolet ray protection effect

Placing each cosmetic on quartz plate at a concentration of 2mg/cm²The total transmittance spectrum was measured using an SPF analyzer (Optometrics), and the transmittance at a wavelength of 300nm was determined as the protection in the UVB region, the transmittance at a wavelength of 370nm as the protection in the UVA region, and the transmittance at a wavelength of 450nm as the transparency of visible light.

(2) Water evaporation rate (occlusive)

20ml of water was filled into a 40ml vial (visual). 0.03ml of each cosmetic was applied to a cellulose film filter (A300A 142C, manufactured by Toyo Roshi Co., Ltd.) having a diameter of 2.2cm, and the filter applied with the cosmetic was sandwiched between caps having holes (circles having a diameter of 1.4 cm) as caps of vials.

The resulting mixture was stored at 30 ℃ and a humidity of 40% for 2 days, and the weight of the mixture before and after storage was measured to calculate the amount of water evaporated. The water evaporation rate was determined by the following equation, taking the water evaporation amount when only water was applied to the filter as 100. The smaller the value, the higher the water occlusion property, and the more excellent the moisture retention property.

Water evaporation rate (%) = (amount of water evaporated from sample/amount of water evaporated from water) × 100

(3) Without feeling of dryness

Each cosmetic was applied to the hands at 1g by 5 panelists, and the degree of dryness was evaluated organoleptically by each panelist at 5 ratings of 1 to 5, 1 point in the case of very dry and 5 points in the case of no dry. The evaluation results were obtained by averaging the values and rounding the points after the decimal point of the average score. Higher evaluation score indicates more inhibition of drying.

[ Table 1]

*1: sofclean ceramide SLE (manufactured by kao corporation),. 2: uvinul MC 80 (manufactured by BASF corporation)

*3: uvinul a Plus (manufactured by BASF corporation), 4: parleam Ex (manufactured by NOF Corporation)

*5: silicone SH3775M (HLB 5, made by Toray Dow Corning Silicone Co., Ltd.)

*6: silicone TSF405A (Momentive Co., Ltd.)

*7: silicone KF-96L-2CS (manufactured by Shin-Etsu Silicone Co., Ltd.)

*8: a powder having a surface of fine zinc oxide ZnO-350 (Sumimoto Osaka Cement) subjected to octylsilylation

*9: POLYSILICONE-9 (INCI name, manufactured by HUAWANG corporation)

Examples 3 to 8

A W/O type emulsion cosmetic having a composition shown in Table 2 was produced in the same manner as in examples 1 to 2, and the obtained cosmetic was evaluated for water evaporation rate and non-dry feeling. The results are shown in Table 2.

The obtained cosmetic has excellent transparency and high ultraviolet protection effect.

[ Table 2]

[ Table 3]

*10: cholesterol (JSCI) (manufactured by Nippon Kogyo Co., Ltd.)

*11: MARUKASOL R (produced by Wanshan petrochemical Co., Ltd.)

*12: IP Solvent 1620MU (made by Shengxing corporation)

*13: SALACOS 913 (The Nisshin OilliO Group, Ltd. manufacture)

*14: silicone KF-6015 (manufactured by Shin-Etsu Silicone Co., Ltd.; HLB 4)

*15: nikkol BC-2 (Nikko Chemicals Co., Ltd.; HLB 8; manufactured by Ltd.)

*16: rheopearl KL2 (made by Qianye Mill Co., Ltd.)

Examples 9 to 14

A W/O type emulsion cosmetic having the following composition was produced in the same manner as in examples 1 to 2.

The obtained cosmetic has excellent ultraviolet protection effect and high moisture retention.

[ Table 4]

Example 9

[（B）/（A）=0.03]

[ Table 5]

Example 10

[（B）/（A）=0.1]

[ Table 6]

Example 11

[（B）/（A）=0.1]

[ Table 7]

Example 12

[（B）/（A）=0.05]

[ Table 8]

Example 13

[（B）/（A）=0.75]

[ Table 9]

Example 14

[（B）/（A）=0.1]

Claims

1. A W/O type emulsion cosmetic, wherein,

comprises the following components (A), (B), (C) and (D):

(A) 1 to 20 wt% of a plate-like powder which is surface-treated with an alkylalkoxysilane having an alkyl group having 6 to 10 carbon atoms and an alkoxy group having 1 to 2 carbon atoms;

(B) 0.1 to 10 wt.% of an oil which is solid at 25 ℃;

(C) 0.5 to 60 wt% of a liquid oil having a viscosity of 100,000mPas or less at 25 ℃ and selected from hydrocarbon oils, ester oils and ether oils;

(D) the amount of water is controlled by the amount of water,

the weight ratio of the components (A) and (B) is (B)/(A) = 0.01-5, and the weight ratio of the components (B) and (C) is (B)/(C) = 0.0025-2.

2. The W/O type emulsion cosmetic according to claim 1,

the plate-like powder of the component (A) has an average particle diameter of 0.1 to 10 μm.

3. The W/O type emulsion cosmetic according to claim 1,

the plate-like powder of the component (A) is selected from zinc oxide, titanium dioxide and cerium oxide.

4. The W/O type emulsion cosmetic according to claim 2,

5. The W/O type emulsion cosmetic according to claim 1,

the plate-like powder of the component (a) is a powder surface-treated with octyltriethoxysilane or octyltrimethoxysilane.

6. The W/O type emulsion cosmetic according to claim 2,

7. The W/O type emulsion cosmetic according to claim 3,

8. The W/O type emulsion cosmetic according to claim 4,

9. The W/O type emulsion cosmetic according to claim 1,

component (B) is selected from natural ceramides of types I to VI, N- (2-hydroxy-3-hexadecyloxypropyl) -N-2-hydroxyethyl hexadecylamide and N- (2-hydroxy-3-hexadecyloxypropyl) -N-2-hydroxyethyl decanoamide.

10. The W/O type emulsion cosmetic according to claim 2,

11. The W/O type emulsion cosmetic according to claim 3,

12. The W/O type emulsion cosmetic according to claim 4,

13. The W/O type emulsion cosmetic according to claim 5,

14. The W/O type emulsion cosmetic according to claim 6,

15. The W/O type emulsion cosmetic according to claim 7,

16. The W/O type emulsion cosmetic according to claim 8,

17. The W/O type emulsion cosmetic according to claim 1,

component (B) is selected from aliphatic alcohols and fatty acids.

18. The W/O type emulsion cosmetic according to claim 2,

component (B) is selected from aliphatic alcohols and fatty acids.

19. The W/O type emulsion cosmetic according to claim 3,

component (B) is selected from aliphatic alcohols and fatty acids.

20. The W/O type emulsion cosmetic according to claim 4,

component (B) is selected from aliphatic alcohols and fatty acids.

21. The W/O type emulsion cosmetic according to claim 5,

component (B) is selected from aliphatic alcohols and fatty acids.

22. The W/O type emulsion cosmetic according to claim 6,

component (B) is selected from aliphatic alcohols and fatty acids.

23. The W/O type emulsion cosmetic according to claim 7,

component (B) is selected from aliphatic alcohols and fatty acids.

24. The W/O type emulsion cosmetic according to claim 8,

component (B) is selected from aliphatic alcohols and fatty acids.

25. The W/O type emulsion cosmetic according to claim 1,

the component (B) is selected from natural and synthetic waxes.

26. The W/O type emulsion cosmetic according to claim 2,

the component (B) is selected from natural and synthetic waxes.

27. The W/O type emulsion cosmetic according to claim 3,

the component (B) is selected from natural and synthetic waxes.

28. The W/O type emulsion cosmetic according to claim 4,

the component (B) is selected from natural and synthetic waxes.

29. The W/O type emulsion cosmetic according to claim 5,

the component (B) is selected from natural and synthetic waxes.

30. The W/O type emulsion cosmetic according to claim 6,

the component (B) is selected from natural and synthetic waxes.

31. The W/O type emulsion cosmetic according to claim 7,

the component (B) is selected from natural and synthetic waxes.

32. The W/O type emulsion cosmetic according to claim 8,

the component (B) is selected from natural and synthetic waxes.

33. The W/O type emulsion cosmetic according to any one of claims 1 to 32, wherein the component (C) is a hydrocarbon oil.

34. The W/O type emulsion cosmetic according to any one of claims 1 to 32, wherein component (C) is an ester oil.

35. The W/O type emulsion cosmetic according to any one of claims 1 to 32, wherein component (C) is a mixture of a hydrocarbon oil and an ester oil.

36. The W/O type emulsion cosmetic according to any one of claims 1 to 32, wherein the W/O type emulsion cosmetic further comprises (E) a silicone oil.

37. The W/O type emulsion cosmetic according to claim 33,

the W/O type emulsion cosmetic further contains (E) a silicone oil.

38. The W/O type emulsion cosmetic according to claim 34,

the W/O type emulsion cosmetic further contains (E) a silicone oil.

39. The W/O type emulsion cosmetic according to claim 35,

the W/O type emulsion cosmetic further contains (E) a silicone oil.

40. The W/O type emulsion cosmetic according to claim 36,

the total content of the components (C) and (E) is 10 to 80 wt%.

41. The W/O type emulsion cosmetic according to claim 37,

the total content of the components (C) and (E) is 10 to 80 wt%.

42. The W/O type emulsion cosmetic according to claim 38,

the total content of the components (C) and (E) is 10 to 80 wt%.

43. The W/O type emulsion cosmetic according to claim 39, wherein,

the total content of the components (C) and (E) is 10 to 80 wt%.

44. The W/O type emulsion cosmetic according to claim 36,

the weight ratio of the components (C) and (E) is (C)/(E) = 0.005-5.

45. The W/O type emulsion cosmetic according to claim 37,

the weight ratio of the components (C) and (E) is (C)/(E) = 0.005-5.

46. The W/O type emulsion cosmetic according to claim 38,

the weight ratio of the components (C) and (E) is (C)/(E) = 0.005-5.

47. The W/O type emulsion cosmetic according to claim 39, wherein,

the weight ratio of the components (C) and (E) is (C)/(E) = 0.005-5.

48. The W/O type emulsion cosmetic according to claim 40,

the weight ratio of the components (C) and (E) is (C)/(E) = 0.005-5.

49. The W/O type emulsion cosmetic according to claim 41,

the weight ratio of the components (C) and (E) is (C)/(E) = 0.005-5.

50. The W/O type emulsion cosmetic according to claim 42,

the weight ratio of the components (C) and (E) is (C)/(E) = 0.005-5.

51. The W/O type emulsion cosmetic according to claim 43,

the weight ratio of the components (C) and (E) is (C)/(E) = 0.005-5.

52. The W/O type emulsion cosmetic according to any one of claims 1 to 32,

the W/O type emulsion cosmetic further contains (F) a nonionic surfactant having HLB of 8 or less.

53. The W/O type emulsion cosmetic according to claim 33,

54. The W/O type emulsion cosmetic according to claim 34,

55. The W/O type emulsion cosmetic according to claim 35,

56. The W/O type emulsion cosmetic according to claim 36,

57. The W/O type emulsion cosmetic according to claim 37,

58. The W/O type emulsion cosmetic according to claim 38,

59. The W/O type emulsion cosmetic according to claim 39, wherein,

60. The W/O type emulsion cosmetic according to claim 40,

61. The W/O type emulsion cosmetic according to claim 41,

62. The W/O type emulsion cosmetic according to claim 42,

63. The W/O type emulsion cosmetic according to claim 43,

64. The W/O type emulsion cosmetic according to claim 44,

65. The W/O type emulsion cosmetic according to claim 45,

66. The W/O type emulsion cosmetic according to claim 46,

67. The W/O type emulsion cosmetic according to claim 47,

68. The W/O type emulsion cosmetic according to claim 48,

69. The W/O type emulsion cosmetic according to claim 49,

70. The W/O type emulsion cosmetic according to claim 50,

71. The W/O type emulsion cosmetic according to claim 51, wherein,

72. The W/O type emulsion cosmetic according to any one of claims 1 to 32,

the W/O type emulsion cosmetic further contains an organic ultraviolet absorber having absorption in the UVA region.

73. The W/O type emulsion cosmetic according to claim 33,

74. The W/O type emulsion cosmetic according to claim 34,

75. The W/O type emulsion cosmetic according to claim 35,

76. The W/O type emulsion cosmetic according to claim 36,

77. The W/O type emulsion cosmetic according to claim 37,

78. The W/O type emulsion cosmetic according to claim 38,

79. The W/O type emulsion cosmetic according to claim 39, wherein,

80. The W/O type emulsion cosmetic according to claim 40,

81. The W/O type emulsion cosmetic according to claim 41,

82. The W/O type emulsion cosmetic according to claim 42,

83. The W/O type emulsion cosmetic according to claim 43,

84. The W/O type emulsion cosmetic according to claim 44,

85. The W/O type emulsion cosmetic according to claim 45,

86. The W/O type emulsion cosmetic according to claim 46,

87. The W/O type emulsion cosmetic according to claim 47,

88. The W/O type emulsion cosmetic according to claim 48,

89. The W/O type emulsion cosmetic according to claim 49,

90. The W/O type emulsion cosmetic according to claim 50,

91. The W/O type emulsion cosmetic according to claim 51, wherein,

92. The W/O type emulsion cosmetic according to claim 52,

93. The W/O type emulsion cosmetic according to claim 53, wherein,

94. The W/O type emulsion cosmetic according to claim 54,

95. The W/O type emulsion cosmetic according to claim 55,

96. The W/O type emulsion cosmetic according to claim 56,

97. The W/O type emulsion cosmetic according to claim 57,

98. The W/O type emulsion cosmetic according to claim 58, wherein,

99. The W/O type emulsion cosmetic according to claim 59,

100. The W/O type emulsion cosmetic according to claim 60,

101. The W/O type emulsion cosmetic according to claim 61,

102. The W/O type emulsion cosmetic according to claim 62,

103. The W/O type emulsion cosmetic according to claim 63,

104. The W/O type emulsion cosmetic according to claim 64,

105. The W/O type emulsion cosmetic according to claim 65,

106. The W/O type emulsion cosmetic according to claim 66,

107. The W/O type emulsion cosmetic according to claim 67, wherein,

108. The W/O type emulsion cosmetic according to claim 68,

109. The W/O type emulsion cosmetic according to claim 69,

110. The W/O type emulsion cosmetic according to claim 70,

111. The W/O type emulsion cosmetic according to claim 71,

112. A W/O type emulsion cosmetic, wherein,

comprises the following components (A), (B), (C) and (D):

(A) 1 to 20 wt% of plate-like powder having an average particle diameter of 0.1 to 10 μm selected from zinc oxide, titanium dioxide and cerium oxide surface-treated with octyltriethoxysilane or octyltrimethoxysilane;

(B) 0.1 to 10% by weight of a substance selected from the group consisting of natural ceramides of types I to VI, N- (2-hydroxy-3-hexadecyloxypropyl) -N-2-hydroxyethyl hexadecylamide and N- (2-hydroxy-3-hexadecyloxypropyl) -N-2-hydroxyethyl decylamide;

(C) 0.5 to 60 wt.% of an oil having a viscosity of 100,000mPas or less at 25 ℃ and selected from hydrocarbon oils, ester oils and ether oils;

(D) the amount of water is controlled by the amount of water,

the weight ratio of the components (A) and (B) is (B)/(A) = 0.01-5, and the weight ratio of the components (B) and (C) is (B)/(C) = 0.01-1.

113. A W/O type emulsion cosmetic, wherein,

comprises the following components (A), (B), (C), (D) and (E):

(A) 1 to 20 wt% of plate-like powder of zinc oxide having an average particle diameter of 0.1 to 10 μm which has been surface-treated with octyltriethoxysilane;

(B) 0.1 to 10% by weight of a substance selected from the group consisting of N- (2-hydroxy-3-hexadecyloxypropyl) -N-2-hydroxyethyl hexadecanamide and N- (2-hydroxy-3-hexadecyloxypropyl) -N-2-hydroxyethyl decanamide;

(D) water;

(E) 10 to 40% by weight of dimethylpolysiloxane,

114. A method for the non-therapeutic use of a cosmetic product,

a W/O type emulsion cosmetic composition according to any one of claims 1 to 113, which is applied to the skin.