JP3119379B2 - Water repellent cosmetic powder and cosmetic containing the powder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-repellent cosmetic powder which is excellent in water repellency, does not lose makeup, has good elongation on the skin, and has a good feel when used, and a cosmetic containing the powder. . More specifically, a water-repellent cosmetic powder and a powder obtained by subjecting a powder to a surface treatment with a specific N-mono long-chain acyl-basic amino acid and a double surface treatment with an oil or fat having an acidic group. And a cosmetic containing the same.

[0002]

2. Description of the Related Art Cosmetics containing cosmetic powders include makeup cosmetics such as foundations, white powders, blushers, eye shadows, eye blows, etc., and body powders such as body powders and baby powders. Cosmetics and the like are commercially available. Cosmetics containing these cosmetic powders (powder-type cosmetics) suffer from problems such as spread during application, smoothness on the skin, adhesion to the skin, and perspiration such as sweat collapse and makeup collapse. It is said.

[0003] Conventionally, in order to improve these cosmetic performances, the surface of cosmetic powder has been coated with various organic substances and blended into cosmetics. In makeup cosmetics, in order to prevent the powder from being wetted by water and to prevent the makeup from breaking down, a method of compounding a powder whose surface has been treated with a polysiloxane silicone oil, etc. N- to improve the smoothness above
A method of blending a powder surface-treated with a mono-long-chain acyl basic amino acid (JP-A-61-10503) has been proposed.

[0004] However, these conventional methods still have various problems and have not been sufficiently satisfactory. That is, the powder treated by the surface coating method using the silicone oil of the above-mentioned polysiloxanes has poor smoothness as compared with the powder before the treatment, and therefore, for example, a pressed powder type makeup cosmetic using the powder is used. In the case of the paint, there is a problem that the coating spreads and lacks smoothness on the skin.

[0005] The powder treated by the surface coating method with the above-mentioned N-mono long chain acyl basic amino acid,
Although excellent in smoothness, water repellency, which is an important performance of cosmetics, cannot be sufficiently imparted. Therefore, using this, for example, in a pressed powder type makeup cosmetic, when applied to the skin, water, There is a problem that sweat does not repel, and it absorbs water and sweat and breaks down.

Accordingly, it is an object of the present invention to provide excellent water repellency,
And a cosmetic powder having excellent feeling in use, particularly excellent smoothness, and containing the powder, having good water resistance, being excellent in the effect of preventing makeup loss (sweat loss) due to sweat and the like (makeup durability), and having skin An object of the present invention is to provide a cosmetic composition which has good elongation on the surface and is excellent in use feeling, particularly excellent in smoothness.

[0007]

Means for Solving the Problems As a result of diligent studies, the present inventors have conducted a surface treatment of powder with a specific N-mono long-chain acyl basic amino acid and then further treated with a fat or oil having an acidic group. By performing the double surface treatment, a water-repellent cosmetic powder having water repellency, excellent in use feeling, and capable of exhibiting the same surface treatment effect regardless of the surface properties of the powder is obtained. It has been found that a cosmetic containing a water-repellent cosmetic powder achieves the above object.

[0008] The present invention has been made based on the above-mentioned findings, and a powder is subjected to surface treatment with an N-mono long-chain acyl basic amino acid having one fatty acyl group having 8 to 22 carbon atoms in the molecule. N-mono long chain acyl basic amino acids
After obtaining the processed powder, the processed powder is added to an oil or fat having an acidic group.
Is added as it is or dissolved in a solvent to obtain the treated powder.
To provide a water-repellent cosmetic powder obtained by further surface treating The present invention also provides a cosmetic comprising the water-repellent cosmetic powder of the present invention.

First, the water-repellent cosmetic powder of the present invention will be described in detail. The powder used in the present invention is not particularly limited as long as it is usually used in cosmetics.For example, silicic acid, silicic anhydride, magnesium silicate, talc, sericite, mica, kaolin, red iron, clay, Bentonite, titanium-coated mica, bismuth oxychloride, zirconium oxide, magnesium oxide, zinc oxide, titanium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, iron oxide, ultramarine, chromium oxide, hydroxylated Inorganic powders such as chromium, calamine, carbon black and their composites: polyamide, polyester, polypropylene, polystyrene, polyurethane, vinyl resin, urea resin, phenol resin, fluorine resin, silicon resin, acrylic resin, melamine resin, epoxy resin , Poly Boneto resin, divinylbenzene-styrene copolymer, silk powder, cellulose, CI pigment yellow, organic powders such CI Pigment Orange: and composites thereof and the like of the inorganic powder and organic powder mentioned. These powders are used alone or in combination of two or more.

The shape of the powder is not particularly limited, and a powder such as a plate, a lump, a scale and a sphere can be used irrespective of the presence or absence of pores, but a plate or a sphere is particularly preferable. The primary particle size of the powder is also not particularly limited as long as the outer shape of the powder is kept, but from the viewpoint of feeling in use and the like, it is 0.01 to 80.
μm, particularly preferably 0.1 to 20 μm. Examples of the basic amino acid constituting the N-mono long chain acyl basic amino acid used in the present invention include α, γ-diaminobutyric acid, ornithine, lysine, arginine, histidine and the like. These may be optically active or racemic.

The long-chain acyl group constituting the N-mono long-chain acyl basic amino acid (first treating agent) used in the present invention includes a saturated or unsaturated straight-chain or branched-chain fatty acid having 8 to 22 carbon atoms. Group acyl groups, which may be of single chain length or of mixed chain length. Specific examples of the long-chain acyl group include 2-ethylhexanoyl, caproyl, lauroyl, myristoyl, palmitoyl, stearoyl, isostearyl, oleoyl, behenoyl, cocoyl, tallow fatty acid acyl, and hardened tallow fatty acid acyl. Can be The binding site of the long-chain acyl group to the basic amino acid is an amino group at the α-position or an amino group at the ω-position. In arginine and histidine, the binding site is limited to the amino group at the α-position.

Accordingly, the N-mono long chain acyl basic amino acids used in the present invention include, for example, Nε-2-ethylhexanoyl lysine, Nε-cocoyl lysine, Nε
-Palmitoyl lysine, Nε-isostearoyl lysine, Nε-hardened tallow fatty acid acyl lysine, Nα-caproyl lysine, Nα-lauroyl lysine, Nα-myristoyl lysine, Nα-oleoyl lysine, Nα-behenoyl lysine, Nδ-cocoyl ornithine, Nδ-stearoyl ornithine , Nδ-tallow fatty acid acylornithine,
Nα-2-ethylhexanoyl ornithine, Nα-lauroyl ornithine, Nα-isostearoyl ornithine, Nγ-palmitoyl-α, γ-diaminobutyric acid, Nα
-Tallow fatty acid acyl-α, γ-diaminobutyric acid, Nα-caproylarginine, Nα-lauroylarginine, N
α-palmitoyl arginine, Nα-hardened tallow fatty acid acyl arginine, Nα-cocoyl histidine, Nα-isostearoyl histidine and the like.

The oils and fats having an acidic group (second treating agent) used in the present invention include acidic groups such as carboxylic acid residues and phosphoric acid residues and alkyl or acyl groups having 14 to 22 carbon atoms in the molecule. Having one or more, and substantially insoluble in water. Here, the alkyl group or the acyl group is linear or branched, and when it has a plurality of alkyl groups or acyl groups, it may have a single chain length or a mixed chain length.

Examples of such substances include long-chain fatty acids, long-chain acylated amino acids, long-chain alkyl amino acids, long-chain ether carboxylic acids, and long-chain phosphates. Specifically, for example, long-chain fatty acids include N-palmitic acid, N-stearic acid, isostearic acid, N-arachidic acid and the like. In addition, examples of the long-chain phosphate include those represented by the following general formula (1).

[RO] _y PO [OH] _3-y (1) (wherein, R represents an alkyl group having 14 to 22 carbon atoms and is linear or branched and has a single chain length. Or a mixed chain length. Y represents a number of 1 to 2.) Specifically, dicetyl phosphate, monocetyl phosphate, distearyl phosphate, monostearyl phosphate, dieicosyl phosphate, and the like. Is mentioned.

The N-long-chain acyl neutral and acidic amino acids include, for example, those represented by the following general formulas (2) to (4).

[0017]

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[0018]

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[0019]

Embedded image (In the formula, R represents an alkyl group having 14 to 22 carbon atoms.) Examples of the compounds represented by the general formulas (2) to (4) include, for example, N-stearoyl-N-methyl. Glycine, N-stearoyl-N-methyl-β-alanine, N-stearoyl-L-glutamic acid and the like can be mentioned.

To obtain the water-repellent powder of the present invention, the powder is first treated with the N-mono long-chain acyl basic amino acid. As this surface treatment method, any of a dry method and a wet method can be used. The above-mentioned dry method is simple and effective, and the fine powder and the powder of the N-mono long-chain acyl basic amino acid are stirred and mixed, or the N-mono long-chain acyl basic amino acid and the powder are mixed. After mixing, the surface of the powder can be easily treated by co-milling. In the case of the above wet method, since N-mono long-chain acyl basic amino acids are hardly soluble in water near neutrality and ordinary oil, calcium chloride is used as a solubilizing agent to produce N-mono long-chain acyl base. After the soluble amino acid is dissolved in an organic solvent, the powder is brought into contact with the powder, the powder is further washed with water, the calcium chloride is removed, and the powder is dried, whereby the surface of the powder can be treated.

Alternatively, in addition to the above-mentioned dry method and wet method, an N-mono long-chain acyl basic amino acid may be dissolved in acidic or alkaline water or an aqueous solvent and brought into contact with the powder, and then brought to near neutrality. The same surface treatment can also be carried out by a method of neutralizing to deposit N-mono long-chain acyl basic amino acids on the powder surface, removing salts produced by the neutralization by washing with water, and drying (Japanese Patent Application Laid-Open No. 61-261). -7202, JP-A-61-10503).

The amount of the N-mono long chain acyl basic amino acid to be treated with respect to the above powder is preferably 0.05 to 20% by weight, more preferably 0.5 to 15% by weight. 0.0
If the amount is less than 5% by weight, it is difficult to obtain a sufficient surface treatment effect. If the amount exceeds 20% by weight, the surface treatment effect is not so much improved, so that there is no advantage in terms of economy. The water-repellent cosmetic powder of the present invention is obtained by double-treating the powder surface-treated with the N-mono long-chain acyl basic amino acid as described above with an oil or fat having an acidic group, As a method of performing the double surface treatment, various steps commonly used can be adopted.

For example, the above-mentioned surface treatment is carried out by mixing oils and fats having acidic groups as they are or by mixing them with an appropriate solvent while mixing the powders in a mixing and stirring device such as a Henschel mixer, a vibrating ball mill, a rotary ball mill, a super mixer or the like. (For example, methanol, ethanol, isopropyl alcohol, hexane, chloroform and a mixed solvent thereof)
And added to the powder by spraying or dripping,
After uniformly dispersing, it can be carried out by drying at room temperature or by heating.

The amount of the fat or oil having an acidic group to be treated with the N-mono long-chain acyl basic amino acid-treated powder is preferably 0.01 to 30% by weight, preferably 0.5 to 30% by weight.
-10% by weight. If it is less than 0.01% by weight, it is difficult to obtain sufficient water resistance, and if it exceeds 30% by weight, the feeling in use tends to be poor. Next, the cosmetic of the present invention containing the above-mentioned water-repellent cosmetic powder of the present invention will be described in detail.

The content of the water-repellent cosmetic powder of the cosmetic of the present invention can be appropriately determined according to the kind of the desired cosmetic, but is usually in the range of 0.1 to 99% by weight. . In the cosmetic of the present invention, in addition to the above-mentioned essential components, components which are added to ordinary cosmetics may be added as necessary. These components include, for example, petrolatum, lanolin, ceresin, microcrystalline wax, carnauba wax,
Solid or semi-solid oils such as candelilla wax, higher fatty acids, higher alcohols, etc .; Liquid oils such as squalane, liquid paraffin, ester oil, diglyceride, triglyceride, silicone oil; water-soluble and oil-soluble polymers, surfactants, inorganic and organic Pigments, inorganic and organic pigments treated with silicon or fluorine compounds, coloring agents such as organic dyes, ethanol, preservatives, antioxidants, pigments, thickeners, pH adjusters, fragrances, ultraviolet absorbers, humectants, Examples include a blood circulation promoter, a cooling agent, an antiperspirant, a bactericide, a skin activator, and the like, and can be blended within a qualitative and quantitative range that does not impair the object and effects of the present invention.

The cosmetic of the present invention can be produced according to a usual method, and includes a foundation, an eye shadow,
It can be applied to makeup cosmetics such as blusher and basic cosmetics such as emulsion and cream.

[0027]

The water-repellent cosmetic powder of the present invention is incorporated into cosmetics, prevents makeup collapse due to sebum, etc., improves the elongation of the cosmetic on the skin, and gives the skin a good feel. .

[0028]

EXAMPLES Next, the present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited to these examples. In the following, all amounts are by weight. Example 1 A round-bottomed flask (or kneader) was charged with 50 g of sericite, 50 g of calcium chloride was previously dissolved in 2500 g of ethanol, and then 2.5 g of N-lauroyl lysine was added thereto. With stirring. Next, this was filtered, washed with water to remove calcium chloride, and dried to obtain N-lauroyl lysine-treated sericite (51 g). Next, 155 g of the N-lauroyl lysine-treated sericite thus obtained was placed in a round bottom flask (or kneader), and 31 g of dicetyl phosphoric acid was dissolved in 1500 g of ethanol by heating (60 g).
C.) and mixed at 60 ° C. for 30 minutes. Thereafter, ethanol was distilled off under reduced pressure at 60 ° C. and dried to obtain 160 g of the desired water-repellent cosmetic powder of the present invention.

Example 2 150 g of sericite and 7.5 g of N-lauroyl lysine were placed in a Henschel mixer with stirring and mixed for 10 minutes to perform a surface treatment to obtain N-lauroyl lysine-treated sericite (155 g). Next, 155 g of the obtained N-lauroyl lysine-treated sericite was placed in a round bottom flask (or kneader), to which was added 31 g of dicetyl phosphate dissolved in 1500 g of ethanol by heating (60 ° C.). Mix for 30 minutes at ° C. Thereafter, ethanol was distilled off under reduced pressure at 60 ° C. and dried to obtain 160 g of the desired water-repellent cosmetic powder of the present invention.

Example 3 The desired water-repellent cosmetic powder of the present invention was treated in the same manner as in Example 1 except that stearic acid was used instead of dicetyl phosphoric acid. I got Example 4 Example 1 was repeated except that N-stearoyl-L-glutamic acid was used in place of dicetyl phosphate.
To obtain the intended water-repellent cosmetic powder of the present invention.

Example 5 The procedure of Example 1 was repeated, except that barium sulfate (manufactured by Sakai Chemical Industry Co., Ltd.) was used instead of sericite. A water-repellent cosmetic powder of the present invention was obtained. Comparative Example 1 A round bottom flask (or kneader) was charged with 50 g of sericite, and 50 g of calcium chloride was previously dissolved in 2500 g of ethanol, and then 2.5 g of N-lauroyl lysine was added thereto. With stirring. Next, this was filtered, washed with water to remove calcium chloride, and dried to obtain 51 g of comparative powder.

Comparative Example 2 150 g of sericite was placed in a round bottom flask (or kneader).
And 30 g of dicetyl phosphoric acid is added to ethanol 1
Add what was dissolved by heating (60 ° C) to 500g,
Mix at 60 ° C. for 30 minutes. Thereafter, ethanol was distilled off under reduced pressure at 60 ° C. and dried to obtain 155 g of comparative powder.

Comparative Example 3 Comparative powder was obtained by substantially the same treatment as in Comparative Example 2 except that stearic acid was used instead of dicetyl phosphoric acid. Comparative Example 4 Comparative powder was obtained by treating under substantially the same conditions as in Comparative Example 2 except that barium sulfate (manufactured by Sakai Chemical Industry Co., Ltd.) was used instead of sericite. .

Test Example 1 Each of the powders obtained in Examples 1 to 5 and Comparative Examples 1 to 4 was evaluated for water repellency and use feeling by the following evaluation methods. The results are shown in Table 1 below. (Evaluation method of water repellency) Put 15 ml of water in a 30 ml beaker, float about 0.05 g of each powder on the water, shake the beaker, observe the dispersibility of the powder in water, and evaluate the following. The evaluation was based on criteria.

Evaluation Criteria 0: The powder was immediately dispersed in water. 1: When the beaker was shaken, the powder was almost completely dispersed in water within 30 seconds. 2: When the beaker was shaken, the water became white and cloudy after 1 minute, but powder floating on the water was also observed. 3: When the beaker was shaken, the water became cloudy and white after 1 minute, but there were many powders floating on the water. 4: One minute after the beaker was shaken, the water was not white and cloudy, and no powder dispersed in the water was observed. Even when the beaker was shaken for 5: 1 minutes or more, no powder dispersed in water was observed.

(Evaluation Method of Feeling) Five special panelists evaluated the feeling of the powder, such as smoothness, squeaking, and roughness, on a scale of 1 to 5 shown below. Indicated. The feel of untreated powder of sericite A (manufactured by Horie Kako Co., Ltd.) having an average particle size of 7 μ was set to a standard value of 3.0. 1: The feeling such as smoothness is poor. 2: The touch such as smoothness is slightly poor. 3: Normal (equivalent to Sericite A) 4: Feeling such as smoothness is slightly good. 5: Good feeling such as smoothness.

The results are shown in Table 1 below. From Table 1 above, the water-repellent cosmetic powder of the present invention has a higher water-repellency and feel compared to the case where the N-mono long-chain acyl basic amino acid or long-chain fatty acid or long-chain alkyl phosphoric acid is used alone. It can be seen that both are excellent.

Embodiment 5 FIG. Pressed Face Powder Pressed face powders having the compositions shown in Table 2 were produced by the following methods, respectively, and the makeup durability against perspiration and the feeling of use were evaluated by the following evaluation methods. Table 3 shows the results.
Shown in (Preparation method) The powder components were mixed and pulverized, transferred to a Henschel mixer, and an oil agent and a fragrance were added and mixed so as to be uniform. This was press-molded into a mold to obtain a product. (Evaluation method) The make-up and feel of use were sensory-evaluated by 10 expert panelists and indicated by the following criteria. ：: 8 or more good. Δ: Four to seven good. ×: Good for less than 4 people. The product of the present invention was a pressed face powder which was more excellent in cosmetic durability and feel in use than the comparative product.

Embodiment 6 FIG. Powder foundation A powder foundation having the following composition was produced in the same manner as in Example 5. (Composition)% by weight (1) Cosmetic powder for water repellency (treated in the same manner as in Example 1 and mixed later) Sericite 45.0 Mica 23.0 Kaolin 5.0 Titanium oxide 10.0 Bengala 2. 0 yellow iron oxide 2.5 black iron oxide 0.1 (3) dimethylpolysiloxane 12.0 (4) preservative 0.2 (5) fragrance 0.2 Cheek red The cheek red having the following composition was produced in the same manner as in Example 5. (Composition)% by weight (1) Powder for water-repellent cosmetic (What was treated in the same manner as in Example 3 was mixed later) Kaolin Balance Mica 13.0 Titanium oxide 12.0 Red No. 202 2.4 Iron oxide (Red 5.0, (2) Squalane 7.5 (3) Dimethylpolysiloxane 7.5 (4) Preservatives 0.05 (5) Perfume 0.05 Example 8 Powder Eye Shadow A pigment other than mica titanium was mixed and ground first, and then the mica titanium was mixed. Otherwise, in the same manner as in Example 5, a powder eye shadow having the following composition was produced. (Composition) wt% (1) Water-repellent cosmetic powder (treated in the same manner as in Example 3 and mixed later) Titanium mica 4.9 Sericite balance mica 24.7 Iron oxide (red, black, yellow) 2.0 Ultramarine Blue 9.8 Navy Blue 14.6 (2) Dimethylpolysiloxane 1.9 (3) Squalane 1.9 (4) Vaseline 1.9 (5) Sorbitan Trioleate 1.0 (6) Preservative 1. 0 (7) Fragrance 0.1 Example 9 Dual-use powder foundation A dual-use powder foundation having the following composition was produced in the same manner as in Example 8. (Composition)% by weight (1) Powder for water-repellent cosmetic (treated in the same manner as in Example 4 and mixed later) Mica Balance Talc 4.8 Titanium oxide 14.0 Titanium mica 3.5 Iron oxide (red, (Black, yellow) 8.2 Zinc oxide 4.5 Aluminum oxide 10.0 Barium sulfate 5.0 Polyethylene powder 1.0 (2) Dimethylpolysiloxane 4.0 (3) Lanolin 6.0 (4) Vaseline 1.0 (5) Liquid paraffin 1.0 (6) Isopropyl myristate 1.0 (7) Preservative 1.5 (8) Fragrance 0.1 Loose type face powder Powder components are mixed and crushed, transferred to a Henschel mixer, added with an oil agent and fragrance and mixed so as to be uniform.
Through a sieve, a loose type powder having the following composition was produced. (Composition)% by weight (1) Processed powder of Example 5 50.0 (2) Talc balance (3) Bengala 0.1 (4) Liquid paraffin 1.0 (5) Fragrance 0.1 Example 11 Two-phase separation type sunscreen emulsion After dissolving the oil phase at room temperature, a pigment was added and dispersed by a disper. The aqueous phase was added with stirring and emulsified to produce a sunscreen emulsion having the following composition. (Composition)% by weight (1) Octamethylcyclotetrasiloxane 25.0 (2) Dimethylpolysiloxane 10.0 (3) Dimethylpolysiloxane / polyoxyalkylene copolymer 1.0 (4) Glycerin 2.0 (5 ) Ethanol 12.0 (6) Residual purified water (7) Octyl methoxycinnamate 2.0 (8) Zinc oxide (treated in the same manner as in Example 1) 7.5 (9) Talc (Example 1) 7.0 (10) Perfume Fine amount Example 12 Sunscreen cream A homogeneous mixture of components 10 and 12 dispersed in component 9 with a disper and components 6 to 8 is added to the aqueous components of components 1 to 5 under stirring, and emulsified. A cream was produced. (Composition)% by weight (1) Polyoxyethylene (50) hydrogenated castor oil 0.5 (2) Polyoxyethylene (20) sorbitan palmitate 1.0 (3) Glycerin 6.0 (4) 1,3-butylene Glycol 6.0 (5) Purified water 15.5 (6) Squalane 5.0 (7) Jojoba oil 5.0 (8) Octamethylcyclotetrasiloxane 18.0 (9) Dimethylpolysiloxane 35.0 (10) Titanium oxide (treated as in Example 1) 1.0 (11) Talc (treated as in Example 1) 5.0 (12) Octyl methoxycinnamate 2.0 Example 13 Two-phase separation type liquid foundation After dissolving the oil phase at room temperature, a pigment was added and dispersed by a disper. The aqueous phase was added with stirring and emulsified to produce a liquid foundation having the following composition. (Composition)% by weight (1) Pigment (What was treated in the same manner as in Example 1 was mixed later) Titanium oxide 6.0 Sericite 9.0 Iron oxide (red, black, yellow) 1.2 (2) Octa Methylcyclotetrasiloxane 20.0 (3) Dimethylpolysiloxane 12.0 (KF-96A, 6cs, manufactured by Shin-Etsu Chemical Co., Ltd.) (4) Dimethylpolysiloxane / polyoxyalkylene copolymer 1.0 (5) Glycerin 2. 0 (6) Ethanol 15.0 (7) Remaining amount of purified water (8) Remaining amount of fragrance All of the cosmetics of the present invention obtained in Examples 6 to 13 are excellent in use feeling and extremely long lasting. It was something.

[0040]

The water-repellent cosmetic powder of the present invention is excellent in water repellency and excellent in feeling in use, especially in smoothness.
In addition, the cosmetic of the present invention containing the water-repellent cosmetic powder of the present invention has good water resistance, is excellent in the effect of preventing makeup collapse (sweat breakdown) due to sweat or the like (makeup lasting), and is applied on the skin. It has good elongation at the time of use, and is excellent in use feeling, particularly excellent in smoothness.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-72512 (JP, A) JP-A-61-10503 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61K 7/02 C09C 3/08 C09C 3/10 C09K 3/18 101

Claims (2)

(57) [Claims] 1. A powder is subjected to a surface treatment with an N-mono long-chain acyl basic amino acid having one fatty acyl group having 8 to 22 carbon atoms in a molecule to obtain an N-mono long-chain acyl basic amino acid .
After obtaining the amino acid-treated powder, the treated powder is added with an oil or fat having an acidic group as it is or dissolved in a solvent,
Water-repellent cosmetic powder obtained by further treating the treated powder. 2. A cosmetic comprising the water-repellent cosmetic powder according to claim 1.