JP2000309505A - Powder cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a powder cosmetic being liquefied by embrocation, capable of being finished in a greatly excellent feeling in use without causing a squeaky feeling, having excellent storage stability by including a hydrophobilized silicic anhydride having a specific surface area and an oil-in-water type emulsion composition. SOLUTION: This cosmetic contains (A) 2-20 wt.% of a hydrophobilized silicic anhydride having >=60 m2/g surface area obtained by treating silicic anhydride by an ordinary hydrophobilizing treatment, for example, adding a hydrophobilizing treatment agent (e.g. trimethylsiloxysilicic acid treated powder, etc.), and (B) one or more oil-in-water type (O/W) emulsion compositions. The mixture can be mixed with (C) 0.001-10 wt.% of an unstable component in the presence of water (e.g. bleaching agent, antiinflammetory agent, etc.). Purified water, a water-soluble polymer (e.g. gum arabic, carboxyemthylstarch, etc.), etc., are preferably used as the water phase of the component B. An avocado oil, a camellia oil, etc., are used as the oil phase.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder cosmetic which is liquefied by rubbing. More specifically, it is a powder cosmetic that liquefies when applied during use and produces an emulsion-like property, and has no squeaky feeling, can provide a very good feeling of use and finish, and also has a long shelf life of the product. Excellent, and even when components that are unstable in the presence of water or components that adversely affect the physical properties of the product when dissolved in water (hereinafter collectively referred to as “unstable components in the presence of water”) The present invention relates to a powder cosmetic which can stably blend these components and sufficiently exhibit the function of the components.

[0002]

2. Description of the Related Art Conventionally, in the case of powder cosmetics called so-called dry water, water or an aqueous component is coated with a hydrophobized powder or the like to form a powder, which is liquefied when rubbed when used. As these powder cosmetics, white powder, whitening powder, and the like are known, but there are problems such as a finished powdery and easily dried skin.

[0003] In general, various active ingredients such as drugs are blended in cosmetics. However, for the purpose of promoting the penetration of the drugs into the skin, moisturizing properties, imparting emollient properties, etc.
A method of mixing powder cosmetics with water, oil, liquid cosmetics and the like has also been used, but has a problem in usability and the like. Furthermore, when this active ingredient is easily decomposed or deteriorated in the presence of water and is unstable and adversely affects the physical properties of the product, the formulation is not limited to the cosmetic formulation but also to the container form. , Storage conditions, handling, etc.

Various techniques have been proposed to address such a problem. For example, JP-A-6-21620 discloses a hydrophobized silicic acid anhydride having a specific surface area, a fluorine compound-coated cosmetic powder, an oily component, an aqueous component, and an unstable active component (unstable component in the presence of water). ) Is disclosed in a powder cosmetic in which the unstable component is stably blended in the presence of water by blending in a specific amount.

However, in the powder cosmetics described in the above-mentioned publications, it is necessary to powder the oily components with a fluorine compound-coated cosmetic powder in advance in order to mix the oily components, which makes the production process complicated. There is a problem. Further, in terms of usability, there is a problem that a squeaky feeling is caused due to the powder characteristics of the hydrophobized silicic acid compound and the fluorine compound-coated cosmetic powder.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and is a powder cosmetic which is a powdery cosmetic which liquefies when rubbed at the time of use to produce a lotion or emulsion-like property while being used in powder form. There is no squeaky feeling because oily components can be blended into the system without powdering.
A very good feeling and finish can be obtained, and the product has excellent long-term storage stability.
An object of the present invention is to provide a powder cosmetic which is liquefied by rubbing, in which even if unstable components are mixed in the presence of water, these components are stably mixed and the functions thereof can be sufficiently exhibited.

[0007]

The present invention comprises (a) a hydrophobized silicic anhydride having a surface area of 60 m ² / g or more, and (b) one or more oil-in-water emulsion compositions. And powder cosmetics that are liquefied by rubbing.

The present invention also relates to a powder cosmetic which is liquefied by rubbing, wherein the powder cosmetic further comprises (c) an unstable component in the presence of water.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The hydrophobized silicic anhydride as the component (a) used in the present invention is obtained by hydrophobizing the surface of fine silica particles.

The method of the hydrophobizing treatment may be any method as long as it can impart water repellency to the silicic anhydride, and the method is not limited. Examples thereof include a gas phase method, a liquid phase method, an autoclave method, and a mechanochemical method. An ordinary surface treatment method such as a method can be used.

For example, when the treatment is carried out by adding a hydrophobizing agent to the raw material powder, the agent may be diluted with an appropriate solvent (dichloromethane, chloroform, hexane, ethanol, xylene, volatile silicone, etc.) and added. You may add directly. For mixing and stirring the powder and the treating agent, a ball mill, a Hogersight ball mill, a vibration ball mill, an attritor, a pot mill, a rod mill, a pan mill, a homomixer, a homodisper, a Henschel mixer, a Nauter mixer, and the like can also be used. In addition to this, a method of polymerizing a cyclic organosiloxane on a powder surface at a low temperature of 100 ° C. or less by a gas phase reaction utilizing the activity of the powder surface (Japanese Patent Publication No. 1-54380), A method of adding a pendant group such as glycerol monoallyl ether to the Si-H portion of the silicone polymer (Japanese Patent Publication No. 1-54381) can also be used.

The hydrophobizing agent is not particularly limited, but may be a fatty acid dextrin-treated powder, trimethylsiloxysilicate-treated powder, fluorine-modified trimethylsiloxysilicate-treated powder, methylphenylsiloxysilicate-treated powder, or fluorine-modified methylphenylsiloxy. Silicate treated powder,
Dimethyl polysiloxane, diphenyl polysiloxane,
Low-viscosity oily polysiloxane-treated powder such as methylphenylpolysiloxane, gum-like polysiloxane-treated powder, methylhydrogenpolysiloxane-treated powder, fluorine-modified methylhydrogenpolysiloxane-treated powder, methyltrichlorosilane, methyltrialkoxysilane Powder treated with an organic silyl compound such as hexamethyldisilane, dimethyldichlorosilane, dimethyldialkoxysilane, trimethylchlorosilane, trimethylalkoxysilane or a fluorine-substituted product thereof, ethyltrichlorosilane, ethyltrialkoxysilane, propyltrichlorosilane, Propyl trialkoxysilane, hexyl trichlorosilane, hexyl trialkoxysilane, long-chain alkyltrichlorosilane, long-chain alkyltriethoxysilane Organic modified silane or treated powder according to their fluorine substitution products, amino-modified polysiloxane treatment powder, fluorine-modified polysiloxane treatment powder,
Fluoroalkyl phosphoric acid-treated powder and the like.

In the present invention, it can be prepared, for example, by covering the surface of fine silica particles with an organosilane compound or a silicone compound. Specific examples include trimethylsiloxylated silicic anhydride, dimethylsiloxylated silicic anhydride, octylsiloxylated silicic anhydride, silicic anhydride treated with silicone oil, silicic anhydride treated with methylpolysiloxane, and the like.

In the present invention, the hydrophobized silicic acid needs to have a surface area of 60 m ² / g or more. If the surface area is smaller than this, the particle size of the hydrophobized silicic acid increases, and (b) It is not possible to orient a large amount on the surface of the oil-in-water emulsion composition as a component, and it becomes difficult to stably powder the oil-in-water emulsion composition.

The upper limit of the amount of component (a) is preferably 20% by weight, especially 10% by weight. The lower limit is preferably 2% by weight, particularly 5% by weight.
It is. If the amount is too small, the oil-in-water emulsion composition as the component (b) cannot be sufficiently pulverized, and the intended powder form may not be obtained. On the other hand, if the amount is too large, Although a large amount of the oil-in-water emulsified composition can be powdered, liquefaction becomes difficult even when rubbed at the time of use, which is not preferred in terms of functionality.

The component (b) is one or more oil-in-water (O / W) emulsified compositions obtained by emulsifying an aqueous phase (outer phase) and an oil phase (inner phase). These are components for eliminating the feeling of creaking and exhibiting good usability. (B) When the type of emulsification of the component is a water-in-oil type (W / O) emulsification,
Since the component has high hydrophobicity, it swells in the oily component of the external phase and cannot take a powder form.

The aqueous phase (outer phase) of the component (b) is not particularly limited as long as it is an aqueous component generally usable in cosmetics. For example, water such as purified water, a water-soluble polymer and the like are preferable. Used.

Examples of the water-soluble polymer include a natural water-soluble polymer, a semi-synthetic water-soluble polymer, a synthetic water-soluble polymer, and an inorganic water-soluble polymer.

Examples of natural water-soluble polymers include gum arabic, tragacanth gum, galactan, guar gum,
Plant-based water-soluble polymers such as locust bingham, carob gum, karaya gum, carrageenan, pectin, mannan, agar, quince seed (quince), alge colloid (grape extract), starch (rice, corn, potato, wheat), glycyrrhizic acid; xanthan gum , Hyaluronic acid, dextran, succinoglucan, curdlan, pullulan, etc .; and animal-based water-soluble polymers such as collagen, casein, albumin, gelatin and the like.

The semi-synthetic water-soluble polymer includes, for example, starch-based water-soluble polymers such as carboxymethyl starch and methylhydroxypropyl starch; methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, cellulose sodium sulfate, Hydroxypropylcellulose, sodium carboxymethylcellulose (C
MC), cellulose-based water-soluble polymers such as crystalline cellulose and cellulose powder; and alginic acid-based water-soluble polymers such as sodium alginate and propylene glycol alginate.

Examples of the synthetic water-soluble polymer include vinyl-based water-soluble polymers such as polyvinyl alcohol, polyvinyl methyl ether, polyvinylpyrrolidone, and carboxyvinyl polymer (trade name "Carbopol"); polyethylene glycol (molecular weight 20,000, 600,000). , 4,000,00
Polyoxyethylene-based water-soluble polymers such as 0); polyoxyethylene-polyoxypropylene copolymer-based water-soluble polymers; acrylic water-soluble polymers such as sodium polyacrylate, polyethyl acrylate, and polyacrylamide;
Examples thereof include polyethyleneimine and a cationic polymer.

Examples of the inorganic water-soluble polymer include bentonite, AlMg silicate (trade name "Vegum"), laponite, hectorite, and the like.

The aqueous phase may further contain a humectant, a chelating agent, a plant extract, alcohol, a pH adjuster, a preservative, and the like.

Examples of the humectant include 1,3-butylene glycol, glycerin and the like.

Examples of the chelating agent include metaphosphate and edetate.

Examples of the plant extract include a horseshoe extract and a hamamelis extract.

The oil phase (inner phase) of the component (b) is not particularly limited as long as it is an oily component that can be generally used in cosmetics. For example, avocado oil, camellia oil, turtle oil,
Macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, peanut oil, Liquid oils such as teaseed oil, kaya oil, rice bran oil, cinnamon oil, Japanese kiri oil, jojoba oil, germ oil, triglycerin, glycerin trioctanoate, pentaerythritol tetraoctanoate, glycerin triisopalmitate; cocoa butter; Solid oils such as coconut oil, hydrogenated coconut oil, palm oil, palm kernel oil, molle kernel oil, hydrogenated oil, molle, hydrogenated castor oil, etc .; beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ibota wax, whale wax, montan wax, nukarou , Lanolin, kapok wax, lanolin acetate, liquid lanolin, sugarcane Waxes such as isopropyl lanolin fatty acid, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, and POE hydrogenated lanolin alcohol ether; Liquid paraffin, ozokerite, squalene, pristane, paraffin, ceresin,
Hydrocarbon oils such as squalane, petrolatum and microcrystalline wax; isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl dimethyl octanoate Decyl, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexylate, dipentaerythritol fatty acid ester,
N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexylate, trimethylolpropane triisostearate, tetra-2
-Pentaerythritol ethylhexylate, tree 2-
Glycerin ethylhexylate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glycerin trimyristate, glyceride tri-2-heptylundecanoate, methyl ester of castor oil fatty acid, oleic acid oil, seto Stearyl alcohol, acetoglyceride, 2-heptylundecyl palmitate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, ethyl laurate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, ethyl acetate, acetic acid Synthetic ester oils such as butyl, amyl acetate, and triethyl citrate; linear polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane ; Octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, although cyclic silicones such as dodecamethyl cyclohexane siloxane, are not limited to these examples. One or more oil components can be used.

The oil phase may further contain an oily gelling agent such as an organically modified clay mineral, a starch fatty acid ester, or a dimethylpolysiloxane polymer. Further, as an oily component, a fine powder of a high melting point wax such as a microcrystalline wax, a porous powder such as magnesium carbonate, a highly cohesive polymer such as an acrylate copolymer, etc., carry and absorb the oily component, and are powdered. And those obtained by encapsulating an oily component with polymethyl methacrylate, hardened gelatin, agar, or the like.

In particular, the use of encapsulated oily components allows (i) the use of cosmetics to be adjusted and improved by blending various kinds of oils, and (ii) oil-soluble drugs and fragrances. Including capsules and the like in the capsule has effects such as stabilizing the drug component and the fragrance component until the time of rubbing use.

Specific examples of the encapsulated component include gelatin, agar, sodium alginate, agarose, rosin, gum arabic, epoxy, polyacrylamide, shellac, carboxymethylcellulose, polyvinyl alcohol, polyurethane, polystyrene, polyester, polyamide, and urea. Are exemplified as preferred.

As the oil component contained in the capsule,
Any oil component that can be blended in cosmetics can be used without any particular limitation, but it is possible to blend oil-soluble drug components such as retinol, tocopherol acetate, l-menthol, hinokitiol, ethinyl estradiol, olive oil, and flavors. Thereby, the active ingredient can be stably maintained until the time of use by rubbing. These oil components are 1
Species or two or more can be used.

The oil component can be encapsulated by a known method such as a coacervation method (Japanese Patent Application Laid-Open No. Hei 1-266846, etc.).

The component (b) further includes, in addition to higher alcohols and higher fatty acids, an acrylic acid / alkyl methacrylate copolymer, N-stearoyl- A polymer compound such as sodium L-glutamate may be blended.

Examples of the higher alcohol include cetyl alcohol, stearyl alcohol, isostearyl alcohol, 2-octyldodecanol, and behenyl alcohol.

As higher fatty acids, for example, palmitic acid, stearic acid, behenic (behenic) acid, oleic acid, 12-hydroxystearic acid, isostearic acid, linoleic acid, linoleic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA) ) And the like.

The O / W emulsion composition of the component (b) can be prepared by a conventional method, and the emulsification method is not particularly limited. For example, a method in which an oil phase and an aqueous phase are each heated to about 70 ° C., the heated aqueous phase is gradually added to the oil phase, emulsified by an emulsifier, and then allowed to cool to room temperature. But not limited thereto. In particular, an O / W emulsion composition obtained by emulsification using a polymer such as an acrylic acid / alkyl methacrylate copolymer, a polymer such as sodium N-stearoyl-L-glutamate, or a combination of a higher alcohol and a high-supply fatty acid is used. The powder cosmetic powdered with the component (a) has excellent usability.

The amount of the component (b) can be mixed with the remaining amount of the total amount of the other essential components and optional components contained in the cosmetic of the present invention. In the present invention, the upper limit is preferably used. Is 98% by weight, particularly 90% by weight, and the lower limit thereof is preferably 80% by weight, particularly 8% by weight.
5% by weight. If the amount is too small, liquefaction becomes difficult when rubbing, while if the amount is too large, powdering becomes difficult, which is not preferred in terms of functionality.

The powder cosmetic of the present invention containing the above-mentioned components (a) and (b) as essential components reduces the feeling of creaking, which has hitherto been considered a problem peculiar to powder cosmetics, and is excellent in usability. The effect is obtained. Also good powdering,
It liquefies easily during rubbing and gives a fresh feeling of use.

In the present invention, in addition to the components (a) and (b), an unstable component in the presence of water may be further added as the component (c).

The unstable component in the presence of water as the component (c) is, for example, a water-soluble component which is blended as a drug or the like in cosmetics, pharmaceuticals, etc., and in which the intervention of water is indispensable to exhibit its function. However, it is unstable in the presence of water, such as decomposition, inactivation, crystal precipitation, discoloration, and off-odor due to the effects of contact with water, light, heat, etc. Then, it refers to one that causes separation, aggregation, thickening, and the like. Such components include, for example, whitening agents,
Examples of such agents include anti-inflammatory agents, antibacterial agents, hormonal agents, vitamins, enzymes, antioxidants, and plant extracts.

Examples of the whitening agent include hydroquinone derivatives such as arbutin, kojic acid, L-ascorbic acid and its derivatives, pantotenyl ethyl ether, tranexamic acid and its derivatives.

L-ascorbic acid generally contains vitamin C
It is said that it has a cell respiratory action, an enzyme activating action, a collagen formation action and a melanin reducing action by its strong reducing action. Examples of L-ascorbic acid derivatives include L-ascorbic acid monoesters such as L-ascorbic acid monophosphate and L-ascorbic acid-2-sulfate, and L-ascorbic acid such as L-ascorbic acid-2-glucoside. Acid glucosides, or salts thereof, and the like.

Examples of the tranexamic acid derivative include tranexamic acid dimers (for example, trans-4- (trans-aminomethylcyclohexanecarbonyl) aminomethylcyclohexanecarboxylic acid, etc.) and esters of tranexamic acid and hydroquinone (for example, Transformer-4
-Aminomethylcyclohexanecarboxylic acid 4'-hydroxyphenyl ester, etc.), esters of tranexamic acid and gentisic acid (e.g., 2- (trans-4-aminomethylcyclohexylcarbonyloxy) -5-hydroxybenzoic acid and salts thereof, Tranexamic acid amides (eg, trans-4-aminomethylcyclohexanecarboxylic acid methylamide and its salts, trans-4- (P-methoxybenzoyl) aminomethylcyclohexanecarboxylic acid and its salts, trans-4-
Guanidinomethylcyclohexanecarboxylic acid and its salts, etc.).

Examples of the anti-inflammatory agent include glycyrrhizinate (eg, dipotassium glycyrrhizinate, ammonium glycyrrhizinate, etc.), allantoin and the like.

Examples of the antibacterial agent include resorcin, sulfur, salicylic acid and the like.

Hormonal agents include, for example, oxytocin, corticotropin, vasopressin, secretin,
Gastrin, calcitonin and the like.

As the vitamins, for example, vitamins
B₆, Vitamin B₆Vitamin B such as hydrochloride ₆Derivative, Nico
Nicotinic acid derivatives such as formic acid and nicotinamide
No.

Examples of the enzyme include trypsin, lysozyme chloride, chymotrypsin, semi-alkaline proteinase, serrapeptase, lipase, hyaluronidase and the like.

The antioxidants include thiotaurine, glutathione, catechin, albumin, ferritin, metallothionein and the like.

[0050] Plant extracts include tea extract, Izayobara extract, Japanese gourd extract, Budwort extract, Ouba extract, melilot extract, Oyster extract, Licorice extract, Peony extract, Sabonso extract,
Loofah extract, kina extract, saxifrage extract, clara extract, kohone extract, fennel extract, primrose extract, rose extract, gyno extract, lemon extract,
Chicken extract, aloe extract, shobu root extract, eucalyptus extract, horsetail extract, sage extract, thyme extract, seaweed extract, cucumber extract, clove extract, raspberry extract, melissa extract, carrot extract, maroni extract, peach extract, peach extract, mulberry extract, cornflower Extract, hamamelis extract, licorice extract and the like.

The upper limit of the amount of component (c) is preferably 10% by weight, more preferably 7% by weight, and particularly preferably 5% by weight. The lower limit is preferably 0.001% by weight, more preferably 0.005% by weight, and particularly 0.01% by weight. If the amount is too small, it is difficult to sufficiently exert the function of the active ingredient (c). On the other hand, if the amount is too large, the effect is expected to increase in proportion to the increase in the amount. It becomes difficult.
In the powder cosmetic of the present invention, even when the component (c) is blended, these components can be stabilized, and their functions can be sufficiently exhibited.

The powder cosmetic of the present invention may contain, in addition to the above-mentioned components, various optional ingredients used in ordinary cosmetics, such as fragrances, preservatives, various powders, water-soluble and oil-soluble drugs, and the like. Can be blended within a range that does not hinder the effect of the above.

The cosmetic of the present invention is a powder cosmetic.
It liquefies by rubbing, has no squeaky feeling, shows extremely good usability, has excellent long-term stability, and can stably retain unstable components in the presence of water.

The powder cosmetic of the present invention is adsorbed around the component (b) and the component (c) by the component (a), and these components (b) and (c) are powdered. When a force is applied by rubbing, this adsorbed state is destroyed, and the powdered components (b) and (c) ooze out and liquefy, and the addition effect of the component (b) is used. This improves the feel and the effectiveness of the component (c).

The method for producing the powder cosmetic of the present invention is not particularly limited as long as the component (b) and the component (c) are powdered with the component (a). For example, (b)
The production method includes, for example, adding and mixing the component (a) to the component or a solution obtained by further dissolving the component (c) therein, but is not limited thereto.

[0056]

EXAMPLES 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. In addition, all compounding amounts are shown by weight%.

Prior to the examples, test methods and evaluation methods used in the present invention will be described.

[Usability (squeaking feeling) test]
Usability (squeaking feeling) of the comparative example product was determined and evaluated by an actual use test of the panel (50 persons) according to the following criteria. (Judgment criteria) Significant effect: Not squeaky Effective: Slightly squeaked, but no problem in use Slightly effective: Squeaky Ineffective: Severe squealing (Evaluation) ◎: Significant effect, effective, and slightly effective 80% or more of the test subjects ○: 50 to less than 80% of subjects judged to be highly effective, effective, and slightly effective Δ: 30 to less than 50% of subjects judged to be extremely effective, effective, and slightly effective ×: Excellent Less than 30% of subjects judged effective, effective, and somewhat effective

[Stability Test of Drug (Unstable Component in the Presence of Water)] For each of the products of Examples, the residual amount of the unstable component in the presence of water when stored at 40 ° C. (one month, three months, six months) was determined. , HPLC, and the residual ratio was determined.

[Product Long-Term Storage Stability Test] Each of the products of the Examples was prepared at 0 ° C., room temperature, and 40 ° C. under exposure conditions (sunshine irradiation).
The samples stored for months were evaluated according to the following criteria. (Evaluation) ：: Cosmetic did not change. 粉末: Powder or water droplets slightly adhered to the container. △: Slightly water-separated.

(Example 1, Comparative Example 1) Powder cosmetics were prepared according to the composition shown in Table 1 below. The usability (squeaking feeling) of Example 1 and Comparative Example 1 was evaluated by the above test method. In Table 1, trimethylsilyl group-treated silicic anhydride was used.
^(*) Used "Aerosil R812S" (manufactured by Nippon Aerosil Co., Ltd .; surface area 220 m ² / g). Table 1 shows the results.

[0062]

[Table 1]

(Manufacturing method) In Example 1, (1) to (7)
(9) was mixed and dissolved (phase A). On the other hand, (8), (10) and (11) were separately mixed and dissolved (B
phase). Next, an emulsion was prepared while gradually adding the phase B to the phase A. The obtained emulsion and (12) are mixed and stirred,
The container was filled.

On the other hand, in Comparative Example 1, (1) to (7) were mixed and dissolved, and this and (12) were mixed, stirred and filled in a container.

As is clear from the results in Table 1, Example 1
The powdery cosmetic did not show a squeaky feeling as compared with Comparative Example 1, and showed extremely good usability.

(Example 2, Comparative Example 2) Powder cosmetics having the compositions shown in Table 2 below were prepared. The usability (squeaking feeling) of Example 2 and Comparative Example 2 was evaluated by the above test method. In Table 2, dimethylsilicone oil treated silicic anhydride was used.
^(*) Used "Aerosil R202" (manufactured by Nippon Aerosil Co., Ltd .; surface area 100 m ² / g). Table 2 shows the results.

[0067]

[Table 2]

(Production Method) In Example 2, (1) to (7) were mixed and dissolved (phase A). On the other hand, apart from this (8) ~
(14) was mixed and dissolved (phase B). Next, an emulsion was prepared while gradually adding the phase B to the phase A. The obtained emulsion and (15) were mixed, stirred, and filled in a container.

On the other hand, in Comparative Example 2, (1) to (7) were mixed and dissolved, and this and (15) were mixed, stirred and filled in a container.

As is clear from the results in Table 2, Example 2
The powdery cosmetic did not show a squeaky feeling as compared with Comparative Example 2, and showed extremely good usability.

(Example 3, Comparative Example 3) Powder cosmetics having the compositions shown in Table 3 below were prepared. The usability (squeaking feeling) of Example 3 and Comparative Example 3 was evaluated by the above test method. In Table 3, dimethyl silicone oil treated silicic anhydride
^(*) Used "Aerosil RY200S" (manufactured by Nippon Aerosil Co., Ltd .; surface area 80 m ² / g). Table 3 shows the results.

[0072]

[Table 3]

(Production method) In Example 3, (1) to (6)
(8) was mixed and dissolved (phase A). Separately, (7), (9), and (10) were mixed and dissolved (B phase).
Next, an emulsion was prepared while gradually adding the phase B to the phase A. The obtained emulsion and (11) were mixed, stirred, and filled in a container.

On the other hand, in Comparative Example 3, (1) to (6) were mixed and dissolved, and this and (11) were mixed, stirred and filled in a container.

As is clear from the results in Table 3, Example 3
No powder cosmetics showed a squeaky feeling as compared with Comparative Example 3 and showed extremely good usability.

<Stability of Drug (Unstable Component in the Presence of Water)>
With respect to the powder cosmetics of the present invention prepared in Examples 1 to 3, the stability of the unstable component in the presence of water was evaluated by the above-described drug (unstable component in the presence of water) stability test method. Table 4 shows the results.

[0077]

[Table 4]

As is evident from Table 4, in all of the powder cosmetics of Examples 1 to 3, unstable active ingredients almost remained even after elapse of 6 months at 40 ° C. There was no problem.

<Long-term storage stability of product> The long-term storage stability of the product was evaluated by the above-mentioned long-term storage stability test method for the powder cosmetics of the present invention prepared in Examples 1 to 3. Table 5 shows the results.

[0080]

[Table 5]

As is evident from Table 5, in each of the powder cosmetics of Examples 1 to 3, the morphology of the preparation hardly changed even after 6 months under each storage condition, and the storage stability of the product over time was not changed. There was no problem.

(Example 4) (Combined component) (% by weight) (1) Xanthan gum 0.3 (2) 1,3-butylene glycol 4.0 (3) Citric acid 0.05 (4) Citric acid Sodium 0.05 (5) Preservative 0.2 (6) Potassium hydroxide 0.02 (7) Purified water residue (8) L-ascorbic acid-2-glucoside 1.0 (9) Acrylic acid / methacrylic acid Alkyl copolymer 0.06 (10) Liquid paraffin 1.0 (11) Behenyl alcohol 0.05 (12) Stearyl alcohol 0.03 (13) Cellulosic water-soluble polymer 1.0 ("Celluloflow C25": Chisso Corporation) (14) Silicic anhydride treated with dimethyl silicone oil 2.0 (“Aerosil R202” surface area 100 m ² / g) (Production method) After mixing and dissolving (1) to (9), (13)
Was dispersed (phase A). On the other hand, apart from this (10) ~
(12) was mixed and dissolved (phase B). Next, an emulsion was prepared while gradually adding the phase B to the phase A. The obtained emulsion and (14) were mixed, stirred, and filled in a container.

The powder cosmetic of Example 4 has no squeaky feeling, shows extremely good usability, and has excellent drug stability,
The product had excellent long-term storage stability.

(Example 5) (combination component) (% by weight) (1) hydroxyethyl cellulose 0.2 (2) trehalose 2.0 (3) citric acid 0.05 (4) sodium citrate 0.05 (5) Preservative 0.2 (6) Potassium hydroxide 0.02 (7) Purified water residue (8) L-ascorbic acid-2-glucoside 1.0 (9) N-stearoyl-L-glutamate sodium 0 .2 (10) Methylpolysiloxane 1.0 (11) Behenyl alcohol 0.1 (12) Stearyl alcohol 0.05 (13) Silicic anhydride 2.0 ("Sildex L-51"; Asahi Glass Co., Ltd.) (14) ) Silicic anhydride treated with dimethyl silicone oil 20.0 (“Aerosil RY200S”, surface area 80 m ² / g) (Production method) (1) to (9) were mixed and dissolved (phase A). On the other hand, (10) to (12) were mixed and dissolved separately (B phase). Next, an emulsion was prepared while gradually adding the phase B to the phase A. The obtained emulsion and (13) and (14) were mixed, stirred, and filled in a container.

The powder cosmetic of Example 5 has no squeaky feeling, shows extremely good usability, and has excellent drug stability and
The product had excellent long-term storage stability.

The powder cosmetics of Examples 1 to 5 were
In each case, good powdering was obtained, liquefaction at the time of rubbing was good, and fresh usability was obtained.

(Example 6, Comparative Example 4) Powder cosmetics having the compositions shown in Table 7 below were prepared. According to the test method described above, the usability (squeaking feeling) of Example 6 and Comparative Example 4 and the long-term storage stability of the product were evaluated. In Table 7, the capsule dispersion (A
Phase) ^(*) is a dispersion of the encapsulated oily component having the composition shown in Table 6 below. In Table 7, silicic acid anhydride ^{(* )} treated with dimethyl silicone oil is “Aerosil R202”.
(Manufactured by Nippon Aerosil Co., Ltd .; surface area: 100 m ² / g). Table 7 shows the results.

[0088]

[Table 6]

(Preparation Method) A capsule dispersion (phase A) in which a fragrance was dissolved in jojoba oil was obtained by a coacervation method.

[0090]

[Table 7]

(Production method) In Example 6, (2) to (8)
After mixing and dissolving (10), phase A ((1)) was uniformly dispersed (phase B). Apart from this, (9), (11), (1
2) was mixed and dissolved (phase C). Next, an emulsion was prepared while gradually adding the phase C to the phase B. The obtained emulsion and (13) were mixed, stirred, and filled in a container.

On the other hand, in Comparative Example 4, after mixing and dissolving (2) to (8), phase A ((1)) was uniformly dispersed (B
phase). This and (13) were mixed, stirred, and filled in a container.

As is clear from the results in Table 7, Example 6
The powdery cosmetic did not show a squeaky feeling, had a freshness, and showed good usability as compared with Comparative Example 4. In the powder cosmetic of Example 6, the morphology of the preparation hardly changed even after 6 months under each storage condition, and there was no problem in the stability of the preparation over time.

[0094]

The powder cosmetic of the present invention, while being a powder, is liquefied by rubbing at the time of use, gives a refreshing feeling and moist feeling during use, and is excellent in affinity for skin, emollient, moisture, etc. And a very good feeling of use and finish without any squeaky feeling can be obtained. In addition, the product has excellent long-term storage stability. Furthermore, since the unstable component in the presence of water, which has conventionally been considered difficult to be incorporated into cosmetics, can be stably maintained in the composition for a long period of time, it can be widely used as a new type of cosmetic.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Nobuyoshi Koga 1050 Nippa-cho, Kohoku-ku, Yokohama, Kanagawa Prefecture Inside Shiseido Daiichi Research Center Co., Ltd. (72) Emiko Takasu 1050 Nippa-cho, Kohoku-ku, Yokohama, Kanagawa Inside Shiseido Daiichi Research Center Co., Ltd. (72) Inventor Seiji Nishiyama 1050 Nippa-cho, Kohoku-ku, Yokohama, Kanagawa Prefecture Inside 72 Shiseido Daiichi Research Center Co., Ltd. 1050 Inside Shiseido Daiichi Research Center Co., Ltd.

Claims (6)

[Claims] 1. A powder cosmetic composition comprising (a) a hydrophobic silicic anhydride having a surface area of 60 m ² / g or more and (b) one or more oil-in-water emulsion compositions, which is liquefied by rubbing. . 2. The composition according to claim 1, wherein the component (a) contains 2 to 20% by weight.
The powder cosmetic according to claim 1. 3. The powder cosmetic according to claim 1, further comprising (c) an unstable component in the presence of water. 4. The component (c) is one or more selected from whitening agents, anti-inflammatory agents, antibacterial agents, hormonal agents, vitamins, enzymes, antioxidants, and plant extracts. The powder cosmetic according to claim 3. (5) The component (c) is a hydroquinone derivative,
Kojic acid, L- ascorbic acid and its derivatives, pantothenyl ethyl ether, tranexamic acid and its derivatives, glycyrrhizin salts, resorcinol, sulfur, salicylic acid, vitamin of B ₆ and derivatives thereof, nicotinic acid and its derivatives, trypsin, hyaluronidase, thiotaurine The powder cosmetic according to claim 3, wherein the cosmetic is at least one selected from the group consisting of, glutathione, tea extract, and Izayobara extract. 6. The powder cosmetic according to claim 3, which contains 0.001 to 10% by weight of the component (c).