JP2005154325A - Hydrous powder cosmetic base and cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydrous powder cosmetic uniform in particle size distribution with a small amount of hydrophobic fine silica used, good in feeling when applied with quick liquefaction, and slightly leaving white powder on the skin even after used. <P>SOLUTION: A hydrous powder cosmetic base is provided, essentially comprising (A) 0.1-20 mass% of hydrophobic fine silica and (B) 50-99.9 mass% of water. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hydrated powder cosmetic base material and a hydrated powder cosmetic material in which the base material contains a cosmetic raw material. More specifically, an object of the present invention is to provide a water-containing powder cosmetic that has a powdery form in a normal state but liquefies when applied during use to become a lotion or emulsion.

  Conventionally, powder makeup cosmetics have been used by many people because of their good usability, but the finish is good for people with dry skin and those with normal skin in winter. There are disadvantages that it is powdery, the coating film is not glossy or tensioned, a natural and natural finish cannot be obtained, and freshness and refreshing feeling cannot be obtained. On the other hand, cosmetics that obtain a cooling effect by adding water to powder makeup cosmetics are known, but this is satisfactory in terms of feeling of use such as adhesion, adhesion, powderiness, and feeling of tension. It was not a thing. On the other hand, O / W liquid type cosmetics overcome the above-mentioned drawbacks of powder cosmetics, but on the other hand, they are weak against water, sweat, sebum, easy to make up, and have stickiness. .

  As a solution to the above-mentioned problem of usability of cosmetics, there is known a powder cosmetic obtained by pulverizing an aqueous solution containing a cosmetic raw material such as a whitening component using hydrophobic silicic anhydride (Patent Documents 1 and 2). reference). This powder cosmetic is easily liquefied when rubbed, has dramatically improved usability, has excellent stability of active ingredients, and can be advantageously used as a powder cosmetic. . However, in the above prior art, the particle size of the obtained powder is non-uniform, the liquefaction is not smooth in use, and it is necessary to use a relatively large amount of hydrophobic silicic anhydride. As a result, the feeling of use / application is unsatisfactory, and after use, a large amount of the above hydrophobized silicic acid anhydride remains on the skin surface, and white powder (hydrophobic silicic acid anhydride) remains on the skin surface due to moisture drying. There was a problem that a “squeaking” sensation occurred.

JP-A-5-65212 JP-A-10-265367

  Therefore, the object of the present invention is a water-containing powder that has a uniform particle size distribution with a small amount of hydrophobic fine silica used, a high liquefaction rate, excellent coating feeling, and a small proportion of white powder remaining on the skin surface even after use. It is in providing a cosmetic base material, and a water-containing powder cosmetic in which the base material contains a cosmetic raw material.

The above object is achieved by the present invention described below. That is, the present invention provides a water-containing powder cosmetic base material comprising the following components (A) and (B) as essential components.
(A) Hydrophobic fine silica 0.1-20 mass%
(B) Water 50-99.9 mass%
(However, the component (A) is a hydrophobic fine silica having a surface OH group number per unit surface area of 0.3 / nm ² or less and a modified hydrophobicity of 60% or more.)

  The present invention also provides a hydrated powder cosmetic, wherein the hydrated powder cosmetic base further contains a water-soluble or water-insoluble cosmetic raw material. When the water-insoluble cosmetic raw material is an oily substance, the oily substance is preferably emulsified in the water. Moreover, when the said cosmetic raw material is a water-soluble substance, it is preferable that this water-soluble substance is melt | dissolving in the said water.

Next, the present invention will be described in more detail with reference to preferred embodiments.
The main feature of the present invention is that the number of OH groups on the surface per unit surface area is not more than 0.3 / nm ^{2 when} powdered water or aqueous solution of the hydrated powder cosmetic base material. And the hydrophobic fine silica having a modified hydrophobicity of 60% or more is used. By using such hydrophobic fine silica, the amount of hydrophobic fine silica used is small and the particle size distribution is narrow, and when used as a cosmetic, the liquefaction speed is fast and the feeling of application is good. There are few cosmetics with no squeaky feeling.

The hydrophobic fine silica used in the present invention is a silica composed of fine particles having a specific surface area of 50 to 500 m ² / g, particularly 150 to 300 m ² / g. Such fine silica can be usually produced by flame pyrolysis or hydrolysis of halogenosilane (see JP-A-7-10524). The hydrophobic fine silica must have a surface OH group number per unit surface area of 0.3 / nm ² or less and a modified hydrophobicity of 60% or more. The above-mentioned hydrophobic fine silica is a fine silica with extremely high hydrophobicity due to the combined effects of both the small number of surface OH groups and the high degree of modified hydrophobicity. I found out.

  When either one of the number of surface OH groups and the modified hydrophobicity is out of the above range, it does not become fine silica having sufficient hydrophobicity as compared with the hydrophobic fine silica. For example, when the number of surface OH groups exceeds the above value, generally there is a tendency to show a large amount of moisture absorption in a humidity environment. Further, when the modified hydrophobicity is less than the above value, for example, when dispersed in water, the dispersion of fine silica is not sufficient and the viscosity becomes high, and the change in the viscosity with time tends to increase. These two tendencies are not always clearly distinguishable and are considered to influence each other.

The number of OH groups on the surface may be 0.3 / nm ² or less, but 0.25 / nm ² or less, and more preferably 0.20 / nm ² or less, This is preferable. The number of OH groups on the surface per unit surface area in the present invention is a value calculated based on the surface moisture content measured by a known Karl Fischer method. Further, the modified hydrophobicity may be 60% or more, but is preferably 62% or more. The modified hydrophobicity can be measured by a known method.

  The hydrophobic fine silica used in the present invention is preferably one having few coarse particles, and usually the sieve residue having an opening of 45 μm is preferably 0.1% by mass or less. Further, since the hydrophobic fine silica used in the present invention has a hydrophobic group contributing to the modified hydrophobicity on the surface, the hydrophobic fine silica has carbon corresponding to the amount of the hydrophobic group on the surface. Can be measured. For example, the carbon content of the hydrophobic fine silica is usually in the range of 2.7 to 5.0% by mass (refer to JP-A-7-10524 for the above measurement method).

  The hydrophobic fine silica is used in an amount of 0.1 to 20% by mass, preferably 0.5 to 5% by mass in the water-containing powder cosmetic base material of the present invention. If the amount used is less than 0.1% by mass, water may not be sufficiently pulverized, and a stable water-containing powder form may not be obtained. On the other hand, if it exceeds 20% by mass, it cannot be sufficiently liquefied even if it is applied during use, and the usability may be deteriorated.

  The water used in the present invention imparts liquefaction to the hydrated powder cosmetic when it contains a cosmetic raw material to be described later, and when the cosmetic raw material is a water-insoluble substance, for example, an oily substance, a medium for emulsifying the oily substance. In addition, when the cosmetic raw material is a water-insoluble powder, for example, various inorganic or organic powders, the cosmetic raw material is a water-soluble substance such as a polyhydric alcohol or a water-soluble high In the case of molecules, it functions as a solvent for them, and gives a good feeling of use such as freshness and moistness to cosmetics.

  The amount of water to be used is 50 to 99.9% by mass. If the amount of water used is less than 50% by mass, it is difficult to make water into powder, and the resulting hydrated powdery cosmetic is insufficiently moist. . On the other hand, when the amount of water exceeds 99.9% by mass, other components, particularly cosmetic raw materials, cannot be included in an amount that satisfies the requirements.

  The water-containing powder cosmetic base material of the present invention can be obtained by mixing the hydrophobic fine silica uniformly using a Henschel mixer or the like and slowly injecting water into the powdered powder. In addition, also when the said component contains the following cosmetic raw material, the water phase is similarly pulverized and the water-containing powder cosmetic of this invention is obtained.

  The water-containing powder cosmetic of the present invention is characterized in that the above-mentioned water-containing powder cosmetic base material of the present invention contains various cosmetic raw materials. The cosmetic raw material is obtained by pulverizing at the same time in addition to the hydrophobic fine silica and water at the time of producing the hydrated powder cosmetic base material, and is obtained by a method suitable for the obtained hydrated powder cosmetic base material. You may add and mix.

  The cosmetic material used in the present invention will be described. Examples of cosmetic raw materials include oils that are insoluble in water, organic inorganic powders, water-soluble substances, and mixtures thereof. The oily substance 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, flaxseed oil, safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnagiri oil, Japan Liquid oils such as kiri oil, jojoba oil, germ oil, triglycerin, glycerin trioctanoate, pentaerythritol tetraoctanoate, glycerin triisopalmitate; cocoa butter, coconut oil, hydrogenated coconut oil, palm oil, palm kernel oil, Solid fats such as owl kernel oil, hydrogenated oil, owl, hydrogenated castor oil, etc .;

  Beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ibota wax, whale wax, montan wax, nukarou, lanolin, capok wax, lanolin acetate, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, lauryl hexyl, reduced lanolin, jojoballow, hard lanolin, Shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, waxes such as POE hydrogenated lanolin alcohol ether, etc .; liquid paraffin, ozokerite, squalene, pristane, paraffin, ceresin, squalane, petrolatum, Hydrocarbon oil such as microcrystalline wax

  Isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, stearic acid Isocetyl, isocetyl isostearate, cholesteryl 12-hydroxystearylate, ethylene glycol di-2-ethylhexylate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, di- 2-glyceryl 2-heptylundecanoate, trimethylolpropane tri-2-ethylhexylate, trimethylolpropane triisostearate Bread, pentaerythritol tetra-2-ethylhexylate, glyceryl tri-2-ethylhexylate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glyceryl trimyristate, tri-2-heptyl Undecanoic acid glyceride, castor oil fatty acid methyl ester, oleic acid oil, cetostearyl alcohol, acetoglyceride, 2-heptyl undecyl palmitate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, ethyl laurate, myristic acid 2 -Synthetic ester oils such as hexyldecyl, 2-hexyldecyl palmitate, ethyl acetate, butyl acetate, amyl acetate, triethyl citrate, etc.

Examples include linear polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane; cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexanesiloxane. It is not limited. One or two or more oily components can be used.

  In addition, an oily gelling agent such as an organically modified clay mineral, starch fatty acid ester, or dimethylpolysiloxane polymer may be used in combination with the oily component. Furthermore, as oily components, oily components were supported and absorbed in fine powders of high melting point waxes such as microcrystalline wax, porous powders such as magnesium carbonate, and highly cohesive polymers such as acrylate copolymers. It is also possible to use a product obtained by encapsulating an oil component with polymethyl methacrylate, hardened gelatin, agar or the like.

  In particular, by using an oil-based component encapsulated, (i) it is possible to adjust and improve the usability of cosmetics by blending various types of oils. (Ii) Capsules such as oil-soluble drugs and fragrances By including it in the inside, there is an effect that the drug component and the fragrance component can be stably maintained until the time of use of the coating.

  Specific examples of the encapsulation component include gelatin, agar, sodium alginate, agarose, rosin, gum arabic, epoxy, polyacrylamide, shellac, carboxymethylcellulose, polyvinyl alcohol, polyurethane, polystyrene, polyester, polyamide, urea, and the like. It is illustrated as.

  The oil component contained in the capsule can be used without particular limitation as long as it is an oil component that can be blended in cosmetics, but oils such as retinol, tocopherol acetate, l-menthol, hinokitiol, ethinylestradiol, olive oil, etc. By blending a soluble drug component, a fragrance, etc., the active ingredient can be stably maintained until the time of use. These oil components can be used alone or in combination of two or more. The encapsulation of the oil component can be produced by using a known method such as a coacervation method (Japanese Patent Laid-Open No. 1-266846).

  In order to further improve the oil-in-water type emulsion stability, the oily component includes, in addition to higher alcohol and higher fatty acid, acrylic acid / alkyl methacrylate copolymer, sodium N-stearoyl-L-glutamate, etc. These polymer compounds may be blended. Examples of the higher alcohol include cetyl alcohol, stearyl alcohol, isostearyl alcohol, 2-octyldodecanol, and behenyl alcohol. Examples of the higher fatty acid include palmitic acid, stearic acid, behenic acid, oleic acid, 12-hydroxystearic acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and the like. Is mentioned.

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

  Examples of organic / inorganic cosmetic raw materials include talc, mica, kaolin, magnesium carbonate, calcium carbonate, aluminum silicate, magnesium silicate, calcium silicate, titanium oxide, zinc oxide, bengara, yellow iron oxide, black Examples thereof include iron oxide, gunjo, conger, tar pigment, natural pigment, mica titanium, iron oxide mica titanium, bismuth oxychloride, nylon powder, and silk powder.

  Examples of the water-soluble substance used in the present invention include natural water-soluble polymers, semi-synthetic water-soluble polymers, synthetic water-soluble polymers, and inorganic water-soluble polymers. Examples of natural water-soluble polymers include gum arabic, gum tragacanth, galactan, guar gum, locust bin gum, carob gum, caraya gum, carrageenan, pectin, mannan, agar, quince seed (malmello), algae colloid (gypsum extract), starch (rice) , Corn, potato, wheat), plant-based water-soluble polymers such as glycyrrhizic acid; microbial-based water-soluble polymers such as xanthan gum, hyaluronic acid, dextran, succinoglucan, curdlan, pullulan; collagen, casein, albumin, gelatin Animal water-soluble polymers such as

  Examples of semi-synthetic water-soluble polymers include starch-based water-soluble polymers such as carboxymethyl starch and methylhydroxypropyl starch; methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, and hydroxypropyl. Cellulose-based water-soluble polymers such as cellulose, sodium carboxymethyl cellulose (CMC), 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, polyvinyl pyrrolidone, and carboxyvinyl polymer (trade name “Carbopol”); polyethylene glycol (molecular weights 20,000 and 600). , 4,000, 000,000), etc .; polyoxyethylene polyoxypropylene copolymer water-soluble polymers; acrylic water such as sodium polyacrylate, polyethyl acrylate, polyacrylamide Polymer; polyethyleneimine, cationic polymer and the like.

  Examples of the inorganic water-soluble polymer include bentonite, AlMg silicate (trade name “Bee gum”), laponite, hectorite, and the like.

  The aqueous phase may further contain a moisturizing agent, a chelating agent, a plant extract, alcohol, a pH adjusting agent, a preservative, and the like. Examples of the humectant include 1,3-butylene glycol and glycerin. Examples of chelating agents include metaphosphate and edetate. Examples of the plant extract include a yarrow extract and a hamamelis extract.

  In the present invention, in addition to the various cosmetic raw materials, an unstable component may be blended in the presence of water. The component is, for example, a water-soluble component that is formulated as a drug in cosmetics, pharmaceuticals, etc., and water is indispensable in order to exert its function, but contact with water, light, heat, It is unstable in the presence of water, such as decomposition, inactivation, crystal precipitation, discoloration, and off-flavor due to the effects of, etc., and when it is mixed as it is in aqueous or emulsified cosmetics, it causes separation, aggregation, thickening, etc. Say. Examples of such components include agents such as whitening agents, anti-inflammatory agents, antibacterial agents, hormone agents, vitamins, enzymes, antioxidants, and plant extracts.

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

  L-ascorbic acid is generally referred to as vitamin C, and due to its strong reducing action, it has cell respiration action, enzyme activation action, collagen formation action, and melanin reduction 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-2-glucoside and the like. Examples include ascorbic acid glucosides and salts thereof.

  Examples of the tranexamic acid derivatives include dimers of tranexamic acid (for example, trans-4- (trans-aminomethylcyclohexanecarbonyl) aminomethylcyclohexanecarboxylic acid), and esters of tranexamic acid and hydroquinone (for example, trans-4- Aminomethylcyclohexanecarboxylic acid 4′-hydroxyphenyl ester, etc.), ester form of tranexamic acid and gentisic acid (for example, 2- (trans-4-aminomethylcyclohexylcarbonyloxy) -5-hydroxybenzoic acid and its salts), Amides of tranexamic acid (eg trans-4-aminomethylcyclohexanecarboxylic acid methylamide and its salts, trans-4- (P-methoxybenzoyl) aminomethylcyclohexanecarboxylic acid and Salts, such as trans-4-guanidinomethyl cyclohexane carboxylic acid and its salts).

  Examples of the anti-inflammatory agent include glycyrrhizinate (eg, dipotassium glycyrrhizinate, ammonium glycyrrhizinate), allantoin and the like. Examples of the antibacterial agent include resorcin, sulfur, salicylic acid and the like. Examples of the hormonal agent include oxytocin, corticotropin, vasopressin, secretin, gastrin, calcitonin and the like.

  Examples of vitamins include vitamin B6 derivatives such as vitamin B6 and vitamin B6 hydrochloride, and nicotinic acid derivatives such as nicotinic acid and nicotinamide. Examples of the enzyme include trypsin, lysozyme chloride, chymotrypsin, semi-alkaline proteinase, serrapeptase, lipase, and hyaluronidase. Antioxidants include thiotaurine, glutathione, catechin, albumin, ferritin, metallothionein and the like.

  The plant extracts include tea extract, Isaiyobara extract, Ogon extract, Dokudami extract, Oat extract, Merilot extract, Odori extract, licorice extract, peonies extract, savory extract, loofah extract, quina extract, yukinoshita extract, clara extract, kuhone extract , Fennel extract, primrose extract, rose extract, ginger extract, lemon extract, chicory extract, aloe extract, ginger root extract, eucalyptus extract, horsetail extract, sage extract, thyme extract, seaweed extract, cucumber extract, clove extract, raspberry extract, melissa extract, Examples include carrot extract, horse chestnut extract, peach extract, peach leaf extract, mulberry extract, cornflower extract, hamamelis extract, and licorice extract.

  As for the compounding quantity with respect to the said water-containing powder cosmetic base material component of the said component, the upper limit has preferable 10 mass%, More preferably, it is 7 mass%, Especially it is 5 mass%. Moreover, the lower limit is preferably 0.001% by mass, more preferably 0.005% by mass, and particularly 0.01% by mass. If the blending amount is too small, it is difficult to sufficiently exert the function of the above-mentioned component as an active ingredient. On the other hand, if the blending amount is too much, it is possible to expect an increase in the effect commensurate with the increase in the blending amount. It becomes difficult. In the water-containing powder cosmetic of the present invention, even when the above components are blended, these components can be stabilized and their functions can be sufficiently exhibited.

  In addition to the above components, the water-containing powder cosmetic of the present invention contains various optional components used in normal cosmetics, such as fragrances, preservatives, various powders, water-soluble and oil-soluble drugs, and the like. It can mix | blend in the range which does not prevent.

  The water-containing powder cosmetic of the present invention produced as described above has a powder form, but liquefies when applied and becomes a lotion-like or emulsion-like. That is, the water-containing powder cosmetic of the present invention is a cosmetic having a powdery form, but is easily liquefied by rubbing during use, fresh and smooth during use, and powdery and squeaky after use. There is little feeling and a moist feeling can be given.

  EXAMPLES Next, although an Example and a comparative example are given and this invention is demonstrated further in detail, this invention is not limited by this. In the examples and comparative examples, “%” indicates mass%.

Examples 1-4 and Comparative Examples 1-4
The water-containing powder cosmetics having the compositions shown in Table 1 below were respectively prepared by the following methods, and evaluations were made regarding whether or not powdering was possible and the feeling of use.

The physical properties of the hydrophobic fine silica in Table 1 are as follows.
“Hydrophobic fine silica A”: specific surface area 200 m ² / g, carbon content 3.5% by mass, OH group number 0.26 / nm ² , modified hydrophobicity 63%
“Hydrophobic fine silica B”: specific surface area 192 m ² / g, carbon content 2.8% by mass, OH group number 0.15 / nm ² , modified hydrophobicity 62%
“Hydrophobic fine silica C”: specific surface area 253 m ² / g, carbon content 4.6 mass%, OH group number 0.25 / nm ² , modified hydrophobicity 63%

(Preparation method)
A: Any one of components 3 to 6 in Table 1 is stirred at room temperature using a Henschel mixer.
B: Components 1-2 and 7-8 in Table 1 are mixed and dissolved at room temperature.
C: To the place where A was being stirred, B was slowly added to obtain a beautifying skin powder.

(Evaluation methods)
1. Whether or not powdering was possible The state immediately after production of the obtained skin-beautifying powder was visually observed and evaluated according to the following criteria.
[Evaluation criteria]
A: Powdered very homogeneously.
○: Although there are some inhomogeneous parts, it is powdered.
(Triangle | delta): The aqueous component which is not pulverized is recognized by the lower part.
X: Hydrophobic fine silica or hydrophobized silicic acid anhydride is not dispersed in the aqueous component,
It floated on the surface and was not powdered at all.

2. Skin care effect, usability and feeling of use Twenty women were tested once every day for 10 consecutive days. An appropriate amount of the sample was taken in the palm of the hand, rubbed and liquefied, and then applied to the face. The “liquefaction” at the time of coating, “smoothness of spread” during use, and “moist feeling” after use were evaluated based on the following five criteria, and further averaged. These comprehensive evaluations were regarded as skin beautifying effects.

[Evaluation criteria]
5 points: very good 4 points: good 3 points: normal 2 points: slightly bad 1 point: bad

[Judgment]
A: Average score of 4.5 or more.
○: The average score is 3.5 or more and less than 4.5.
Δ: The average score is 2.5 or more and less than 3.5.
X: Average point less than 2.5 points.
The results obtained by the evaluation method are also shown in Table 1.

  As is apparent from the obtained results, the skin-beautifying powders of Examples 1 to 4 exhibit an excellent skin-beautifying effect and good powdering with a very small amount of hydrophobic silica used, and are easily liquefied by rubbing. It was excellent in usability and had an excellent usability. On the other hand, in Comparative Examples 1 and 2, powdering was not possible and other evaluations were not possible. Moreover, in Comparative Examples 3-4, although pulverization was once possible, the particle size distribution was rough and other effects were also inferior to the Example.

Example 5
<Beautiful skin powder> (Moist type): (Ingredient) (%)
1. Aloe extract 37.5
2. 1,3-butylene glycol 1.0
3. Glycerin 1.0
4). Pyrrolidonecarboxylic acid sodium salt aqueous solution (50
% Solution) 2.00
5). Trimethylglycine 1.0
6). Preservative 0.30
7). Hydrophobic fine silica A 1.0
8). Purified water 56.20

(Production method)
A: Components 1 to 6 and 8 are mixed and dissolved at room temperature.
B: Component 7 was stirred using a Henschel mixer, and A was slowly added and injected to obtain a skin powder.
The resulting cosmetic has an excellent skin beautifying effect, has a homogeneous powder form, good liquefaction at the time of coating, excellent use feeling, especially moist feeling after use, and excellent moisturizing effect Met.

Example 6
<Beautiful skin powder> (fresh type): (ingredient) (%)
1. Prasetan extract 13.0
2. 1,3-butylene glycol 20.0
3. Preservative 0.3
4). Antioxidant 0.05
5). Chelating agent 0.1
6). Hydrophobic fine silica B 2.0
7). Purified water 64.55

(Production method)
A: Components 1 to 5 and 7 are stirred and mixed at 70 ° C. and then cooled.
B: Component 6 was stirred using a Henschel mixer, and A was slowly added and injected to obtain a skin powder.
The obtained cosmetic has an excellent skin beautifying effect, has a homogeneous powder form, has good liquefaction during coating, has an excellent feeling of use, and has an excellent emollient effect that softens the skin after use. It was a beautiful skin powder.

According to the present invention, a water-containing powder cosmetic having a uniform particle size distribution with a small amount of hydrophobic fine silica used, a high liquefaction rate, excellent coating feeling, and a small proportion of white powder remaining on the skin surface even after use. A water-containing powder cosmetic comprising a base material and the base material and the cosmetic raw material can be provided.

Claims (4)

A hydrous powder cosmetic base material comprising the following components (A) and (B) as essential components.
(A) Hydrophobic fine silica 0.1-20 mass%
(B) Water 50-99.9 mass%
(However, the component (A) is a hydrophobic fine silica having a surface OH group number per unit surface area of 0.3 / nm ² or less and a modified hydrophobicity of 60% or more.) Further, a water-containing powder cosmetic comprising a water-soluble or water-insoluble cosmetic raw material. The water-containing powder cosmetic according to claim 2, wherein the water-insoluble cosmetic raw material is an oily substance, and the oily substance is emulsified in the water. The water-containing powder cosmetic according to claim 2, wherein the cosmetic raw material is a water-soluble substance, and the water-soluble substance is dissolved in the water.