JP2020070235A - Coating powder and makeup containing the same - Google Patents

Abstract

To provide a powder suitable for base makeup, that achieves both a natural and transparent finish, and conceals color unevenness caused by melanin, such as skin blotches.SOLUTION: A base material is coated with particulate iron oxide to form a coating powder. Preferably, the particulate iron oxide has an average particle size of 10-100 nm, and a coverage of the particulate iron oxide is 10-40 mass% relative to the total mass of coating powder.SELECTED DRAWING: None

Description

  The present invention relates to a coated powder suitable for base makeup cosmetics.

Make-up cosmetics such as foundations and concealers have the effect of correcting the skin color and unevenness of defective spots such as spots, pores, and dullness to make them inconspicuous. In recent years, there has been a demand for makeup cosmetics which can hide the defects of the skin while giving a transparent feeling to the skin, allowing a natural finish, and further maintaining such a makeup effect for a longer period of time. .
In order to improve the hiding power (covering power), makeup cosmetics generally contain a large amount of a coloring pigment having a high refractive index such as titanium dioxide or iron oxide. However, in such makeup cosmetics, since the pigment blocks the entire visible light region, it is possible to hide color unevenness and the like, but on the other hand, it has a flat texture and an unnatural finish, which is not preferable.
In order to eliminate such drawbacks, it has been proposed that a specific titanium dioxide is burned to have a specific particle diameter, a crystallite diameter, and a specific surface area added to a cosmetic, but such a cosmetic has a hiding power. While excellent, it is still insufficient for a natural finish (Patent Document 1).
It has also been proposed to mix a coating powder obtained by coating a colored cellulose plate-like powder with an inorganic oxide or the like into a cosmetic, and such a cosmetic has excellent color development, has a glossy feeling, and has an excellent wrinkle blurring effect. (Patent Document 2). However, it is not enough to hide color unevenness due to melanin such as stains.

JP, 2017-119622, A JP, 2005-86173, A

  In view of such a situation, it is an object of the present invention to provide a cosmetic that can achieve both a natural and transparent finish and the concealment of color unevenness caused by melanin such as spots.

  The inventors of the present invention have realized that a coating powder obtained by coating a base material with fine iron oxide particles can solve the above problems, and have completed the present invention.

That is, the present invention is as follows.
[1] A coated powder (hereinafter, also referred to as the coated powder of the present invention) containing a substrate and fine particle red iron oxide coating the substrate.
[2] The coated powder according to [1], wherein the fine particle red iron oxide has an average particle diameter of 10 to 100 nm.
[3] The coated powder according to [1] or [2], wherein the coating amount of the particulate red iron oxide with respect to the entire coated powder is 10 to 40% by mass.
[4] The coated powder according to any one of [1] to [3], wherein the base material has a light transmittance of 90% or more in a wavelength range of 600 to 800 nm.
[5] The coated powder according to any one of [1] to [4], wherein the median diameter of the base material is 1 to 100 μm.
[6] The coated powder according to any one of [1] to [5], wherein the base material is plate-shaped or spherical.
[7] A cosmetic containing the coated powder according to any one of [1] to [6] (hereinafter, also referred to as the cosmetic of the present invention).
[8] The cosmetic according to [7], which contains the coated powder in an amount of 1 to 10 mass% of the entire cosmetic. [9] The cosmetic material according to [7] or [8], wherein the content of the pigment titanium oxide is 5% by mass or less of the entire cosmetic material.
[10] The cosmetic according to any one of [7] to [9], which is a base makeup cosmetic.

  INDUSTRIAL APPLICABILITY The present invention provides a powder suitable for a base makeup cosmetic, which has both a natural and transparent finish and the ability to hide color unevenness due to melanin such as spots.

The coated powder of the present invention contains a base material and fine particle red iron oxide coating the base material.
The fine particle red iron oxide can cut light (blue light) of 550 nm or less. Since the color unevenness such as spots caused by melanin is caused by light having a wavelength of 550 nm or less, it can be hidden by using fine particle red iron oxide. Further, since the fine particle red iron oxide is excellent in the visible light transmittance of 550 nm or more, the skin color can appear natural when applied to the skin.

Here, the “fine particles” are not particularly limited, but refer to finer particles than the pigment-grade iron oxide powder that is generally blended in cosmetics. Specifically, the average particle diameter (major axis) is preferably 10 to 100 nm, more preferably 30 to 80 nm, and further preferably 40 to 70 nm. Here, the particle diameter is a value calculated by an ordinary method using image analysis software or the like based on an image observed by an optical microscope and calculating an average per unit observation visual field (for example, 10 mm ² ).
Generally pigment-grade iron oxide undergoes primary aggregation / secondary aggregation, resulting in a tint of iron oxide, resulting in poor hiding power. In this respect, since the coated powder of the present invention is an aspect in which the fine particles coat the base material, the aggregation of the fine red iron oxide particles is suppressed. Therefore, coloring of the powder is suppressed, or a natural finish is obtained when applied to the skin.

In the present invention, the term "coating" means that the surface of the base material is covered with the particulate red iron oxide, that is, the base material carries the particulate red iron oxide. Further, the fine red iron oxide particles may be bound to the base material or may be in a state of being attached to the surface of the base material.
The method of coating the base material with the particulate red iron oxide is not particularly limited, but it can be performed by pulverizing with a bead mill or the like. The coating amount can be adjusted by controlling the addition amount.

In the coated powder of the present invention, the coating amount of the particulate red iron oxide with respect to the entire coated powder is preferably 10 to 40% by mass, more preferably 15 to 35% by mass, and further preferably 20 to 30% by mass. Is. If the coating amount is more than 40% by mass, the coating powder particles may aggregate with each other, which may reduce the hiding power or give an unnatural finish. If the coating amount is less than 10% by mass, sufficient hiding power may not be obtained.
The coating amount of fine red iron oxide particles can be measured by fluorescent X-ray measurement.

As the base material in the coated powder of the present invention, it is preferable to use a base material having a light transmittance of 90% or more in the wavelength range of 600 to 800 nm. As a result, when the coated powder is applied to the skin, a transparent and natural finish can be easily obtained.
The base material is not particularly limited, but includes talc, sericite, mica, kaolin,
Silicic acid, anhydrous silicic acid, magnesium silicate, aluminum silicate, barium silicate, hydrous silicic acid, magnesium carbonate, calcium carbonate, boron nitride, barium sulfate, calcium oxide, magnesium oxide, aluminum oxide, calcium borosilicate / aluminum, Examples thereof include alkyl acrylate resins, nylon, silk, cellulose, and composite materials thereof.
As for the size (major axis) of the base material, the median diameter is preferably 1 to 100 μm, more preferably 3 to 70 μm, and further preferably 5 to 40 μm. Here, the measurement of the median diameter is a value obtained by measuring the median value per unit observation field of view (for example, 10 mm ² ) by a usual method using image analysis software or the like based on an observation image by an optical microscope.
The shape is not particularly limited, but it is preferably plate-like or spherical. In the case of a plate, the aspect ratio (particle size / thickness) is not particularly limited, and may be 2 or more, for example. Further, the spherical shape also includes a substantially spherical shape.

The coated powder of the present invention can be suitably blended with cosmetics.
The cosmetics are not particularly limited, but base makeup cosmetics are preferable for the purpose of hiding color unevenness such as spots, and examples thereof include makeup bases, foundations, and finishing powders.
The dosage form of the cosmetics is not particularly limited, such as an emulsifier type such as milk and cream, a gel dosage form, a solid dosage form, a powder dosage form and the like.

  When the coated powder of the present invention is blended with a cosmetic, the content is preferably 1 to 10% by mass of the entire cosmetic. If the content is less than 1% by mass, the desired hiding power may not be obtained, and if it is more than 10% by mass, the transparency or natural finish may not be obtained.

  In the cosmetic containing the coated powder of the present invention, the content of the pigment titanium oxide is preferably 5% by mass or less, more preferably 1% by mass or less, and further preferably not contained in the entire cosmetic. This is because the pigment-grade titanium oxide blocks the entire visible light region, so that when it is applied to the skin, it has a smooth texture and may give an unnatural finish.

The cosmetic of the present invention may further contain other powder.
The powder is not particularly limited, but may be a surface-treated powder such as mica, talc, kaolin, synthetic mica, calcium carbonate, magnesium carbonate, silicic anhydride (silica), aluminum oxide, barium sulfate. Kinds, which may be surface-treated, red iron oxide, yellow iron oxide, black iron oxide, cobalt oxide, ultramarine blue, dark blue, titanium oxide, inorganic pigments of zinc oxide, surface-treated, mica titanium, Fish phosphorus foil, pearls such as bismuth oxychloride, red 202, red 228, red 226, yellow 4, blue 404, yellow 5, red 505, red 230, which may be laked. No. 2, Red 223, Orange 201, Red 213, Yellow 204, Yellow 203, Blue 1, Green 201, Purple 201, Red 204, etc. Ren powder, polymethyl methacrylate, nylon powder, organic powders such as organopolysiloxane elastomers, and the like.

The cosmetic of the present invention may optionally contain, in addition to the above-mentioned components, components used in ordinary cosmetics as long as the effects of the present invention are not impaired.
Such components include, for example, macadamia nut oil, avocado oil, corn oil, olive oil, rapeseed oil, sesame oil, castor oil, safflower oil, cottonseed oil, jojoba oil, palm oil, palm oil, liquid lanolin, hydrogenated palm oil, hydrogenated oil. Oils, waxes such as, syrup, hydrogenated castor oil, beeswax, candelilla wax, carnauba wax, ivota wax, lanolin, reduced lanolin, hard lanolin, jojoba wax; liquid paraffin, squalane, pristane, ozokerite, paraffin, ceresin, vaseline, microcrystalline Hydrocarbons such as waxes; higher fatty acids such as oleic acid, isostearic acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, undecylenic acid; cetyl alcohol, stearyl alcohol, isostearyl alcohol Alcohol, behenyl alcohol, octyldodecanol, myristyl alcohol, cetostearyl alcohol and other higher alcohols; cetyl isooctanoate, isopropyl myristate, hexyldecyl isostearate, diisopropyl adipate, di-2-ethylhexyl sebacate, cetyl lactate, apple Acid diisostearyl, ethylene glycol di-2-ethylhexanoate, neopentyl glycol dicaprate, glycerin di-2-heptylundecanoate, glyceryl tri-2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, Synthetic ester oils such as trimethylolpropane triisostearate and pentane erythritol tetra-2-ethylhexanoate; dimethylpolysiloxane, methylphenylpolysiloxane Chain polysiloxanes such as amine and diphenylpolysiloxane; cyclic polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexanesiloxane; amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, Oils such as silicone oil such as modified polysiloxane such as fluorine-modified polysiloxane;

  Anionic surfactants such as fatty acid soaps (sodium laurate, sodium palmitate, etc.), potassium lauryl sulfate, triethanolamine alkylsulfate, etc .; cationic surfactants such as stearyltrimethylammonium chloride, benzalkonium chloride, laurylamine oxide Kinds; imidazoline-based amphoteric surfactants (2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, etc.), betaine-based surfactants (alkylbetaine, amidobetaine, sulfobetaine, etc.), acyl Amphoteric surfactants such as methyl taurine; sorbitan fatty acid esters (sorbitan monostearate, sorbitan sesquioleate, etc.), glycerin fatty acids (glyceryl monostearate, etc.), propylene glycol Fatty acid esters (propylene glycol monostearate etc.), hydrogenated castor oil derivative, glycerin alkyl ether, POE sorbitan fatty acid esters (POE sorbitan monooleate, polystearic acid polyoxyethylene sorbitan etc.), POE sorbit fatty acid esters ( POE-sorbit monolaurate, etc., POE glycerin fatty acid esters (POE-glycerin monoisostearate, etc.), POE fatty acid esters (polyethylene glycol monooleate, POE distearate, etc.), POE alkyl ethers (POE2-octyldodecyl ether) Etc.), POE alkyl phenyl ethers (POE nonyl phenyl ether, etc.), Pluronic type, POE / POP alkyl ethers (POE / POP2-decyl) Tetradecyl ether, etc., Tetronics, POE castor oil, hydrogenated castor oil derivative (POE castor oil, POE hydrogenated castor oil, etc.), sucrose fatty acid ester, nonionic surfactants such as alkyl glucosides; polyethylene glycol, glycerin , 1,3-butylene glycol, erythritol, sorbitol, xylitol, maltitol, propylene glycol, dipropylene glycol, diglycerin, isoprene glycol, 1,2-pentanediol, 2,4-hexanediol, 1,2-hexanediol , Polyhydric alcohols such as 1,2-octanediol;

  Moisturizing ingredients such as sodium pyrrolidonecarboxylate, lactic acid and sodium lactate; para-aminobenzoic acid UV absorbers; anthranilic acid UV absorbers; salicylic acid UV absorbers; cinnamic acid UV absorbers; benzophenone UV absorbers; sugars UV absorbers; UV absorbers such as 2- (2'-hydroxy-5'-t-octylphenyl) benzotriazole and 4-methoxy-4'-t-butyldibenzoylmethane;

Lower alcohols such as ethanol and isopropanol; vitamin A or a derivative thereof, vitamin B ₆ hydrochloride, vitamin B ₆ tripalmitate, vitamin B ₆ dioctanoate, vitamin B ₂ or a derivative thereof, vitamin B ₁₂ , vitamin B ₁₅ or a derivative thereof B vitamins such as; α-tocopherol, β-tocopherol, γ-tocopherol, vitamin E such as vitamin E acetate, vitamin D, vitamin H, vitamins such as pantothenic acid, pantethine, pyrroloquinoline quinone; glycyrrhizic acid Anti-inflammatory agents such as derivatives, glycyrrhetinic acid derivatives, salicylic acid derivatives, hinokitiol, zinc oxide, allantoin; anti-wrinkle agents such as retinol, ascorbic acid, tocopherol, or farnesyl acetate; various extracts (eg Ku, Ouren, Sikon, Peony, Assemblage, Birch, Sage, Loquat, Carrot, Aloe, Mallow, Iris, Grape, Yokuinin, Loofah, Lily, Saffron, Senkyu, Ginger, Hypericum, Ononis, Garlic, Capsicum, Chinpi, Toki , Seaweed, etc.); activating agents such as royal jelly, photosensitizer, cholesterol derivative; blood circulation promoting agents such as nonyl acid warenylamide, capsaicin, zingerone, tannic acid; antiseborrheic agents such as sulfur and thiantol; tranexamic acid, thiotaurine, hypotaurine, etc. Anti-inflammatory agents; water-soluble polymers such as collagen and hyaluronic acid; and the like.

  In addition, various active ingredients, moisturizers, pH adjusters, antiseptics, antibacterial agents, antioxidants / antioxidant aids, etc. can be optionally added to the cosmetics of the present invention.

Examples of the active ingredient include a whitening ingredient, a wrinkle improving ingredient, an anti-inflammatory ingredient, and an extract derived from plants and animals.
The whitening component is not particularly limited as long as it is generally used in cosmetics. For example, 4-n-butylresorcinol, ascorbic acid glucoside, 3-O-ethylascorbic acid, tranexamic acid, arbutin, ellagic acid, kojic acid, linoleic acid, nicotinic acid amide, 5,5′-dipropylbiphenyl-2, 2'-diol, disodium 5'-adenylate, cetyl tranexamate, potassium 4-methoxysalicylate, hydroquinone, pantothenic acid and the like can be mentioned.

  The wrinkle improving component is not particularly limited as long as it is generally used in cosmetics. For example, isopropyl oxopropylaminocarbonylpyrrolidinecarbonylmethylpropylaminocarbonylbenzoylaminoacetate, nicotinic acid amide, vitamin A or its derivatives (retinol, retinal, retinoic acid, tretinoin, isotretinoin, tocopherol retinoic acid, retinol palmitate). , Retinol acetate, etc.), ursolic acid benzyl ester, ursolic acid phosphoric acid ester, betulinic acid benzyl ester, and benzylic acid phosphoric acid ester.

The extract derived from animals and plants is not particularly limited as long as it is generally used in medicines, cosmetics, foods and the like. For example, akebi extract, asunaro extract, asparagus extract, avocado extract, amacha extract, almond extract, arnica extract, aloe extract, aronia extract, apricot extract, ginkgo biloba extract, Indian quino extract, fennel extract, udo extract, age extract, eleuthero extract. , Echinacea extract, Scutellaria extract, Scutellaria extract, Scutellaria extract, Panax ginseng extract, Hypericum perforatum extract, Stinkweed extract, Orange extract, Kakigoku extract, Cuckoo extract, Chamomile extract, Carrot extract, Kawamura Yomogi extract, Licorice extract, Kiwi extract, Cucumber extract, Guava extract, Kujin extract, Gardenia extract, Kumazasa extract, Clara extract, Walnut extract, Grapefruit extract, Black rice extract Su, Chlorella extract, mulberry extract, cabbage extract, ginseng extract, gentian extract, ginger ginger extract, black tea extract, burdock extract, rice extract, rice fermented extract, rice bran extract, rice germ oil, cowberry extract, salvia extract, savon extract , Sasa extract, hawthorn extract, mint extract, salamander extract, shiitake extract, dio extract, shikon extract, perilla extract, linden extract, spirea extract, peony extract, ginger extract, ginger root extract, birch extract, horsetail extract, stevia extract, stevia fermentation. Substance, Ivy extract, Hawthorn extract, Sambucus nigra extract, Achillea millefolium extract, mint extract, sage extract, mallow Kiss, senkyu extract, senburi extract, sorrel extract, rhubarb extract, soybean extract, turmeric extract, thyme extract, dandelion extract, tea extract, clove extract, chimpi extract, black tea extract, capsicum extract, touki extract, quince extract, spruce extract, spruce extract. , Dokudami extract, tomato extract, natto extract, carrot extract, garlic extract, Novara extract, hibiscus extract, bakumondou extract, lotus extract, parsley extract, birch extract, hamamelis extract, Hikiokoshi extract, cypress extract, loquat extract, butterbur extract, Fukinotou extract. , Bukyou Extract, Butcher Bloom Extract, Grape Extract, Grape Seed Extract, Loofah Extract, Safflower Extract, Peppermint Extract, Bo Daiju extract, button extract, hop extract, pine extract, mayonnaise extract, horse chestnut extract, horse mackerel extract, makuroji extract, melissa extract, mozuku extract, peach extract, cornflower extract, eucalyptus extract, yukinoshita extract, yuzu extract, lily extract, yokuinin extract, mugwort extract, lavender extract. Extracts such as green tea extract, green tea extract, apple extract, rooibos tea extract, litchi extract, lettuce extract, lemon extract, forsythia extract, astragalus extract, rose extract, rosemary extract, Roman chamomile extract, royal jelly extract, and oleander extract are preferred. Can be mentioned.

  Examples of the anti-inflammatory component include clarinone, glabridin, glycyrrhizic acid, glycyrrhetinic acid, pantothenyl alcohol, and the like, and preferably glycyrrhetinic acid and salts thereof, alkyl glycyrrhetinic acid and salts thereof, and glycyrrhetinic acid and salts thereof.

Moisturizers include polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate, lactic acid. Examples thereof include sodium, bile salt, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerin (EO) PO adduct, Iris yezoensis extract, Yarrow millet extract and Merrilot extract.
Examples of the pH adjusting agent include buffers such as lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate.
Examples of preservatives include methylparaben, ethylparaben, butylparaben, phenoxyethanol and the like.
Preferred examples of the antibacterial agent include synthetic antibacterial substances such as 1,3-butylene glycol and paraoxybenzoic acid ester, and natural antibacterial substances such as caprylyl glycol, glyceryl caprylate, ethylhexylglycerin, and caprylhydroxamic acid.
Examples of the antioxidant include tocopherols, dibutylhydroxytoluene, butylhydroxyanisole, gallic acid esters and the like. Examples of the antioxidant auxiliary include phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, fumaric acid, kephalin, hexametaphosphate, phytic acid, ethylenediaminetetraacetic acid and the like.

  Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following Examples unless it exceeds the gist.

<1> Production of coated powder (Production Example 1)
80 g of plate-like cellulose (median diameter 10 μm) and 20 g of red iron oxide (average particle size 50 nm) were mixed and pulverized by a bead mill to obtain coated powder 1.

(Production Example 2)
A coated powder 2 was obtained in the same manner as in Production Example 1 except that red iron oxide was changed to one having an average particle diameter of 300 nm.

(Production Example 3)
A coated powder 3 was obtained in the same manner as in Production Example 1 except that the charged amount of red iron oxide was changed to 4.2 g to change the coating rate to 5% by mass.

(Production Example 4)
A coated powder 4 was obtained in the same manner as in Production Example 1 except that the charged amount of red iron oxide was changed to 80 g and the coverage was 50% by mass.

(Production Example 5)
A coated powder 5 was obtained in the same manner as in Production Example 1 except that the base material was changed to titanium mica (median diameter 10 μm).

<2> Production of Cosmetics The ingredients shown in Table 2 were mixed by a conventional method to obtain each powdery foundation.

The following items were evaluated for each cosmetic.
Regarding the "hiding power of stains", "finishing" and "cohesion of powder" when each cosmetic was applied to the spots on the cheeks, a skilled evaluator visually evaluated the following four grades. ..

-Blemish hiding power ◎: Stain is sufficiently covered and excellent in hiding power ○: Blemish is almost covered and hiding power is good △: Blemish is transparent and not so good ×: Blemish Does not hide, hiding power is poor

-Finish ◎: Excellent natural finish with transparency ○: Good natural finish △: Not very good, with a slight red coloration and unnatural ×: Poor texture with red coloring It is defective due to its natural finish

-Agglomeration of powder ◎: No aggregation ○: Almost no aggregation △: Slightly aggregated and slightly reddish ×: Aggregated and reddish

  The present invention provides a powder that has both a natural and transparent finish and the concealment of color unevenness caused by melanin such as spots. Such a powder is suitable for base make-up cosmetics and is very useful industrially.

Claims (10)

  A coated powder comprising a base material and particulate red iron oxide coating the base material.   The coated powder according to claim 1, wherein the fine red iron oxide particles have an average particle size of 10 to 100 nm.   The coated powder according to claim 1 or 2, wherein the coating amount of the particulate red iron oxide is 10 to 40 mass% with respect to the entire coated powder.   The coated powder according to claim 1, wherein the base material has a light transmittance of 90% or more in a wavelength range of 600 to 800 nm.   The coated powder according to claim 1, wherein the median diameter of the base material is 1 to 100 μm.   The coated powder according to claim 1, wherein the base material has a plate shape or a spherical shape.   Cosmetics containing the coating powder as described in any one of Claims 1-6.   The cosmetic according to claim 7, wherein the coated powder is contained in an amount of 1 to 10 mass% of the entire cosmetic.   The cosmetic according to claim 7 or 8, wherein the content of the pigment titanium oxide is 5% by mass or less based on the whole cosmetic.   The cosmetic according to any one of claims 7 to 9, which is a base makeup cosmetic.