JPH08217989A - Water / oil repellent powder and cosmetics containing the same - Google Patents

Abstract

(57) [Summary] [Structure] A treating agent containing at least one compound having a perfluoroalkyl group and / or a perfluoropolyether group and at least one reactive organosilicon compound. Water- and oil-repellent powder obtained by treating the powder surface with. [Effect] The surface-treated powder of the present invention is excellent in water repellency and oil repellency, and is also excellent in touch to the skin, particularly in smoothness. Furthermore,
It can be produced by a simple method, has good reproducibility and high production efficiency. Further, since the amount of expensive fluorine compound used can be reduced as compared with the conventional one, a low-priced product can be provided.

Description

Detailed Description of the Invention

[0001]

This invention relates to cosmetic powders. In particular, the present invention relates to a cosmetic powder having excellent water and oil repellency, no makeup disintegration, a good spreadability on the skin, and a good feeling in use, and a cosmetic containing the same.

[0002]

2. Description of the Prior Art Cosmetics containing powder include foundation, white powder, body powder, baby powder,
Eye shadows and eyebrows are commercially available. Cosmetics containing these cosmetic powders are required to have good cosmetic performance, such as good spreadability on the skin, good feeling to use such as smoothness, and low disintegration of makeup due to sweat, sebum and the like.

Therefore, in recent years, in order to prevent makeup deterioration due to sweat, tears, rain, etc. and makeup deterioration due to sebum, oil of cosmetics, etc., a powder is treated with a fluorine compound to impart water repellency and oil repellency. It is suggested to do so.

For example, JP-A-55-167209,
US Pat. No. 3,632,744 and the like.

[0005]

[Problems to be Solved by the Invention]
The oil-repellent powder has a drawback that it does not have a smooth feeling during use and the feel is extremely worse than that before the treatment with the fluorine compound. Further, such a fluorine-treated powder has a very low surface tension, so that it has low adhesion to the skin and poor makeup retention, which is a major drawback.

In order to solve the above problems, in recent years, powders have been proposed in which a fluorine compound is used in combination with a surface-active agent for surface treatment. As the surfactant used in combination with the fluorine compound, for example, in JP-A-5-285369, N-mono long-chain acyl basic amino acid is described in JP-A-5-28.
5370 discloses hydrogenated lecithin or a salt thereof, and JP-A-5-285372 proposes an alkali metal salt of zinc monoalkyl or alkenyl phosphate.

These techniques have considerably improved the above problems. That is, a powder having both water / oil repellency and smoothness can be obtained. However, both methods are difficult to process and have low reproducibility. Specifically, in order to obtain the required effect, it is necessary to perform surface treatment multiple times for each component, otherwise the surface treatment cannot be performed uniformly, and the production efficiency was poor. .

On the other hand, since the fluorine compound used for the surface treatment is very expensive, it is desired to obtain a powder which can be surface treated at the lowest possible price and which is excellent in water and oil repellency.

In view of the above circumstances, it is an object of the present invention to provide a water- and oil-repellent powder at a low price, which can be obtained with high reproducibility by a simple processing method and which is excellent in feeling in use, especially in smoothness. . Furthermore, this powder is blended and has good water resistance, sebum resistance, and oil resistance, and it has an excellent effect of preventing makeup from being damaged by sebum (makeup lasting) and has good spreadability on the skin. It is an object of the present invention to provide a cosmetic having excellent feel, particularly smoothness.

[0010]

Means for Solving the Problems The inventors of the present invention have conducted extensive studies in accordance with the above object, and as a result, found that the object can be achieved by surface-treating powder with a specific treating agent, and completed the present invention. Let

That is, the present invention comprises at least one compound having a perfluoroalkyl group and / or a perfluoropolyether group (hereinafter referred to as "A agent"), and
At least one kind of reactive organosilicon compound (hereinafter,
"B agent"), and a water- and oil-repellent powder obtained by treating the powder surface with a treating agent.

When the agent A is an organic silicon compound or a phosphoric acid ester salt, the bond with the surface of the base material powder is strong, and the water and oil repellency of the surface-treated powder is maintained for a very long time. . Also, when a compound having a perfluoropolyether group is selected, the adhesion to the skin is improved,
Further, a powder having excellent smoothness and spreadability can be obtained.

Further, at least one or more kinds of surfactants having a hydrocarbon chain having 12 or more carbon atoms (hereinafter referred to as "C agent").
The powder which has been surface-treated with a treating agent containing a) can be processed with higher reproducibility and can be processed more uniformly. In addition, it is possible to obtain a product in which the skin feel such as smoothness is further improved.

The present invention also relates to a cosmetic containing the above water- and oil-repellent powder.

[0015]

The feature of the water- and oil-repellent powder of the present invention is that the treatment agent is A
Both the agent and the agent B are included. As described above, the treatment with the agent A alone provides water repellency and oil repellency as described above, but the adhesiveness, adhesiveness, and the like of the composition are inferior to the usability. The present invention solves the above-mentioned drawbacks by using the agent B together, and has realized the provision of a powder having smoothness in addition to water repellency and oil repellency.

Conventionally, fluorine compound-treated powder (agent A)
Although there existed cosmetics in which a reactive organosilicon compound (B agent) was blended as an oil phase component, the present invention relates to a powder obtained by surface-treating a base material powder with a mixture of a fluorine compound and a reactive organic compound. Will be disclosed for the first time at.

Further, in the production of the surface-treated powder according to the present invention, by using a mixture of agent A and agent B as a treating agent, the amount of expensive fluorine compound, that is, agent A, can be saved. Therefore, the water- and oil-repellent powder can be provided at a low price. Moreover, regarding water and oil repellency,
An effect equal to or higher than the conventional one can be obtained. For example, conventionally, in order to obtain the minimum water / oil repellency, it has been necessary to use the agent A in an amount of about 5% by weight based on the weight of the base material powder. However, according to the present invention, a surface-treated powder having substantially the same water and oil repellency and an improved smooth feel to the skin can be obtained with about half the amount used.

The above effect is obtained only when the treating agent contains the agents A and B. That is, in the case of a treating agent having another composition such as a combination of only the agent A and the agent C, when the amount of the agent A used is reduced, the oil repellency particularly decreases accordingly.

The agent B acts as a texture-improving agent and as a complement to water repellency, and is considered to have almost no contribution to oil repellency. Nevertheless, even if the amount of agent A used is reduced as described above, the oil repellency is not impaired.
It is first disclosed by the present invention.

When the agent C is further added to the treating agent comprising the agent A and the agent B, the reproducibility for a uniform surface treatment is further enhanced, and the production cost can be further reduced. It is presumed that this is because when the treatment agent is mixed in the powder surface treatment step, the dispersibility of the agent A and the agent B is improved due to the surface-active effect of the agent C.

Further, the water-repellent / oil-repellent powder according to the present invention is
Using a treatment agent in which agent A and agent B and, if necessary, agent C are uniformly mixed with the base powder, the powder obtained by a single surface treatment step is the above-mentioned powder. Fully effective. Therefore, the manufacturing method is simple, and a uniform surface treatment with good reproducibility is possible. This also contributes to providing the powder at a low price.

[0022]

A preferred embodiment of the base material powder applied to the present invention is
All those generally used as cosmetic powders can be applied, for example, silicic acid, silicic acid anhydride, magnesium silicate, talc, sericite, mica, kaolin, montmorillonite, laponite, smectite, titanium oxide, iron oxide, oxidation. Inorganic powder of chromium, chromium hydroxide, boron nitride, barium sulfate, calcium oxide, etc., polyamide, polyethylene, polyurethane, polystyrene, starch,
Examples include rice powder, silk powder, various dyes, organic powders such as organic pigments, and composite powders of these powders. However, the base material powder applied to the present invention is not limited to these. Further, two or more kinds of powder may be used. Similarly, the shape and particle size of the base powder are not particularly limited.

By surface-treating the above-mentioned base powder with a treating agent containing agent A and agent B, a water / oil repellent powder having excellent smoothness can be produced.

In the treating agent according to the present invention, the agent A is preferably used in an amount of 0.1 to 10% by weight based on the weight of the base material powder. If it is less than 0.1% by weight, water and oil repellency cannot be sufficiently exhibited. Even if the treatment exceeds 10% by weight, no particular enhancement of the effect can be expected, and the agent A is expensive and rather economically inefficient. More preferably, the agent A is blended in an amount of 0.5 to 5% by weight based on the weight of the base material powder. Even if the amount of agent A used is such a small amount,
By using the B agent together, the surface-treated powder of the present invention has sufficient water and oil repellency.

On the other hand, agent B, which is another constituent of the treating agent, is 0.1 to 10% by weight based on the weight of the base powder.
It is preferably used. If it is less than 0.1% by weight, sufficient smoothness cannot be obtained. On the other hand, if the treatment is carried out in excess of 10% by weight, the feel is rather deteriorated. More preferably, the surface treatment is performed with a treatment agent containing 1 to 5% by weight of the B agent with respect to the weight of the base powder.

In the present invention, the compound having a perfluoroalkyl group or / and a perfluoropolyether group applied as the agent A is a water-repellent compound having a perfluoroalkyl group or a perfluoropolyether group. And a compound exhibiting oil repellency. Preferred perfluoroalkyl groups are of the _{formula, C n F 2n + 1 -} ( wherein, n 3-10, particularly preferably represents 8) is a straight-chain perfluoroalkyl group represented by. Specifically, for example, perfluoroalkyl phosphate ester salts, perfluoroalkylsilanes, perfluoroalkylsilazanes, perfluoroalkyl group-containing linear organosiloxanes, perfluoroalkyl group-containing cyclic organosiloxanes, perfluoroalkyl groups Examples include contained polypropylene oxides.

The perfluoropolyether group preferably has a molecular weight in the range of about 500 to 10,000, and the perfluoropolyether itself or the end of the perfluoropolyether group is a carboxyl group, a hydroxyl group or a phosphoric acid group. Examples thereof include compounds modified with a silane group, an isocyanate group, and the like. Specifically, it is a derivative having the following modifications at the terminal.

[0028]

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Among the compounds suitable as the agent A exemplified above, organosilicon compounds such as silanes, silazanes, and siloxanes or compounds having a phosphoric acid group have a strong binding force with the base powder. Therefore, it is preferable in terms of sustainability of effect. Further, when a compound having a perfluoropolyether group is applied to the agent A, a surface-treated powder having excellent adhesion to the skin can be obtained, which is preferable.

In the present invention, the B agent supplements the water repellency of the A agent and also acts as a feel improving agent. That is, the reactive organosilicon compound applied as the agent B refers to an organosilicon compound having a function of making the powder surface water-repellent by reacting with the surface of the base material powder. For example, a dimethicone derivative, a silane coupling agent, an alkoxysilane, a silazane, etc. are applicable.

Examples of the dimethicone derivative include hydrogen silicone and dimethicone copolyol. Specific examples thereof include dimethylsiloxane / methylstearoxysiloxane copolymer, dimethylsiloxane / methylcetyloxysiloxane copolymer, and dimethylsiloxane / methyl. (Polyoxyethylene) siloxane copolymer, dimethyl siloxane / methyl (polyoxypropylene) siloxane copolymer, dimethyl siloxane / methyl (polyoxyethylene) siloxane / methyl (polyoxypropylene) siloxane copolymer, and the like.

Although there are many compounds in the alkoxysilane, those which are highly effective and preferred in the present invention include methyltrimethoxysilane, diphenyldimethoxysilane,
Examples thereof include phenyltriethoxysilane. Similarly, silane coupling agents that are particularly effective include:
There are aminopropyltriethoxysilane, vinyltriethoxysilane and the like, and among the silazane compounds, hexamethylsilazane, dimethyltrimethylsilylamine and the like are particularly mentioned.

When the surface treating agent according to the present invention further contains C agent as a component, the homogeneity of the surface treated state of each powder,
It is preferable because reproducibility is improved and manufacturing efficiency is increased. Moreover, the surface-treated powder thus obtained is extremely excellent in smoothness and spreadability.

The surfactant having a hydrocarbon chain used as the C agent in the present invention is a lipophilic surfactant having an action of adsorbing to the surface of the base powder to give lubricity and having a carbon number of 12 or more, preferably 14 or more, preferably a straight chain, more preferably a saturated alkyl chain. Examples thereof include N-long chain acyl amino acid salts, lecithins, higher fatty acid salts, higher alcohol phosphate ester salts, long chain acyl peptides, dialkyl titanates and the like.

Examples of the N-long chain acylamino acid salt include compounds having an amino acid moiety such as ornithine, lysine, arginine, histidine, taurine, alanine, glycine and sarcosine, but the amino acid moiety is not limited thereto. Not a thing.

The lecithins may be animal-derived or plant-derived such as soybean lecithin and egg yolk lecithin. Further, purified lecithins, purified hydrogenated lecithins, phosphatidylcholine, those with increased phospholipid purity such as phosphatidylethanolamine, and these hydrogenated lecithins, lysolecithins, purified lysolecithins,
Examples include hydrogenated lysolecithins and modified lecithins such as hydroxylated lecithin.

The long-chain acyl peptide has a peptide chain molecular weight of about 400 to 100,000, and is preferably a hydrolyzate of a protein derived from animals and plants. Examples of dialkyl titanates include isopropyl triisostearoyl titanate.

The agent C is 0.1 to 0.1 parts by weight based on the weight of the base powder.
Preference is given to using 5% by weight. If the amount is less than 0.1% by weight, the effect is unclear. Conversely, if the amount exceeds 5% by weight, the water and oil repellency is impaired.

The surface-treated powder of the present invention comprises the agents A and B,
Further, it is produced by subjecting the base material powder to a surface treatment with a treating agent containing a C agent, if necessary, by a conventional general surface treatment method.

To further explain, the surface treatment method is roughly classified into a dry method and a wet method. In the dry method, the treatment is carried out by mixing the surface treatment agent of the present invention and the powder for a certain period of time in a stirrer such as a Henschel or a ball mill. In the wet method, the powder is dispersed in a solvent such as water, the surface treatment agent of the present invention is added with stirring, and then the solvent is evaporated to perform the treatment.

Conventionally, when the surface treatment of the base material powder was carried out with a treating agent composed of a plurality of components, sufficient effects could not be obtained unless the surface treatment was carried out for each component. Moreover,
The powder whose surface was uniformly treated was difficult to obtain and had poor reproducibility. However, when the treatment agent according to the present invention is used, a uniform surface treatment can be performed by performing a general surface treatment only once as described above. In addition to water and oil repellency, a powder that also has smoothness. The body can be manufactured. Therefore, the manufacturing efficiency can be greatly improved by the present invention. In particular, when the treating agent containing the agent C is used, the homogeneity of the treatment is remarkably improved.

The treatment agent of the present invention includes the above-mentioned agents A, B,
In addition to the C agent, if necessary, solvents such as water, alcohol, butane, pentane and the like can be contained.

The treated powder of the present invention described above is water repellent
It is suitable as a cosmetic powder because it has excellent oil repellency and also feels smooth when applied to the skin, that is, smoothness.

Next, the cosmetic of the present invention, which is prepared by blending the surface-treated powder of the present invention, will be described in detail.
The cosmetics of the present invention generally include all cosmetics containing conventional cosmetic powders. Such cosmetics include, for example, foundation, white powder, facial cosmetics such as cheeks, eye shadow, mascara, eyeliner,
Examples include eye cosmetics such as eyebrows, makeup cosmetics such as lipsticks, sunscreen cosmetics, basic cosmetics such as emulsions and lotions.

The content of the surface-treated powder in the cosmetic of the present invention varies depending on the form of the cosmetic, but is usually
The range is 1 to 99% by weight, preferably 20 to 99% by weight. If it is less than 1% by weight, water resistance, sebum resistance and oil resistance of the surface-treated powder according to the present invention are not sufficiently exhibited. On the other hand, considering that other ingredients such as pigments and fragrances are mixed as cosmetics, the upper limit may be about 99% by weight.

Regarding the form of individual cosmetics, for example, 30 to 99% by weight for solid powder cosmetics, 20 to 70% by weight for creamy cosmetics, and 20 to 60% for emulsion cosmetics.
It is preferable to add 20 to 30% by weight to the lotion and the lotion.

As the components other than the above powder of the cosmetic of the present invention, it is possible to appropriately select and use from the components to be blended in the usual cosmetics, depending on the kind of the intended cosmetic. Examples of these components include petrolatum, various waxes, waxes, higher fatty acids, higher alcohols, animal and vegetable oils, esters, hydrocarbons, silicones, fluorine oils, various polymers, surfactants, inorganic / organic pigments, coloring agents, Ethanol, various additives, etc., and if necessary, preservatives, antioxidants, fragrances, etc. can be added.

The cosmetic material of the present invention can be manufactured by a conventional method.

The cosmetic of the present invention is excellent in water resistance, sebum resistance, and oil resistance, prevents makeup deterioration due to sweat and sebum, or oil components mixed in the cosmetic, and prevents the cosmetic on the skin. It has an excellent feel during application and gives a good feeling during use.

[0050]

EXAMPLES Next, the present invention will be described in more detail by way of examples.
However, these are merely embodiments of the present invention, and the present invention is not limited to these.

Example 1 A surface treatment powder having the following composition was added to 100 g of sericite and mixed in a Henschel mixer for 10 minutes to obtain a surface treatment powder.

(Composition of surface treatment agent) perfluorofluoro-terphosphate (manufactured by Ausimont) (A agent): 3 g Methyltrimethoxysilane (B agent): 3 g

Example 2 100 g of sericite was dispersed in water, and the surface treating agent having the following composition was added while stirring and mixing the mixture vigorously. After mixing for 20 minutes, the mixture was filtered. This was dried and pulverized to obtain a surface-treated powder.

(Composition of surface treatment agent) Perfluoropolyene-terphosphate ammonium (manufactured by Ausimont) (agent A): 3 g Dimethylsiloxane / methyl (polyoxyethylene) phosphoric acid siloxane copolymer ammonium (manufactured by PCI Phoenix) ) (B agent): 2 g

<Comparative Example> Comparative Examples are the same as those of Examples 1 and 2 except that the surface treating agent having the composition not containing the agent B (only the agent A) is used. 1 and Comparative Example 2.

Example 3 A surface-treated powder was obtained in the same manner as in Example 1 except that barium sulfate was used as the base powder and the surface-treating agent having the following composition was used.

(Composition of surface treatment agent) Perfluoropoly-terphosphite-ammonium (manufactured by Ausimont) (A agent): 3 g Hydrogen polysiloxane (manufactured by Shin-Etsu Chemical Co., Ltd.) (B agent): 2 g Sodium Stearoyl Arani Net (C agent): 1 g

<Example 4> Using titanium oxide as a base powder,
Using the surface treating agent having the following composition, a surface treated powder was obtained in the same manner as in Example 1.

(Composition of the surface treatment agent) perfluoroalkylphosphate-ammonium (A agent): 3 g Polydimethylsiloxane (350 cS) (B agent): 2 g

<Evaluation Test 1-Smoothness> The treated powders of Example 1 and Comparative Example 1 and Example 2 and Comparative Example 2 were applied to the skin by 10 panelists and their feelings were compared. As a result, all panelists evaluated that Example 1 and Example 2 were superior in smoothness to the respective Comparative Examples.

<Evaluation Test 2-Water / Oil Repellency> For each of the Examples and Comparative Examples, oil and water droplets were placed on the surface of the container, which was placed in a fixed container and pressed with a constant load, and the contact angle was measured. . The results were as shown in Table 1. When the same test was performed on untreated sericite, it showed "wetting" to both water and oil.

[0062]

[Table 1]

It was found that the surface-treated powders of the present invention each had a contact angle with water and oil of 130 ° or more and were excellent in water repellency and oil repellency.

<Evaluation Test 3-Adhesion> Surface-treated powder of Example 2 and powder surface-treated in the same manner as in Example 2 except that 5 g of perfluoropolyether phosphate ammonium was used as a treating agent. (“Comparative Example 3”) was used as a sample, and an adhesiveness test was performed with the following shape retention property. (Method) Powder was put in a circular tube having a diameter of 10 cm, and the powder was pressed under a constant load to measure its compressive strength.

(Results) Example 2: 800 g / cm ² Comparative example 3: 500 g / cm ²

The results are as described above, and it was shown that Example 2 was superior in pressure resistance and the shape retention property, that is, the adhesion between the powders was good.

<Evaluation Test 4> Table 2 shows 100 g of sericite.
A surface-treated powder was obtained by treating with the treating agent having the composition shown in the same manner as in Example 1. The obtained surface-treated powder was evaluated for oil repellency test and the feel of the surface-treated powder when applied to the skin by 10 panelists. The oil repellency test is the evaluation test 2
The contact angle with respect to the liquid paraffin was measured in the same manner as in, and the following 5 grades were evaluated according to the angle.

5: 130 ° or more 4: 100 ° or more and less than 130 ° 3: 60 ° or more and less than 100 ° 2: 5 ° or more and less than 60 ° 1: Less than 5 °

The test of the feeling on the skin was carried out by using a certain general commercial product as a standard, and the feeling when the panelists compared the sample with the standard product.
×: Poor, the judgment was made in 3 stages, and finally 70
Based on the consensus of more than 100%, the following 5 grades were evaluated. However, when ◯ and X coexisted, they were offset each other, and the same evaluation was performed from the remaining judgment results. The results are as shown in Table 2.

5: 70% or more ◯ 4: Intermediate value (50% or more and less than 70% ◯) 3: 70% or more Δ 2: Intermediate value (50% or more and less than 70% Δ) 1: 70% or more No ×

[0071]

[Table 2]

The surface-treated powder of the present invention was excellent in both oil repellency and touch. From this result, it was proved that the above two effects can be obtained only when the surface treatment is performed by the combination of the agent A and the agent B.
Further, when the agent C is combined, the feel on the skin can be further improved. It is also noteworthy that sufficient oil repellency can be obtained even if the amount of expensive A agent used is small.

<Evaluation Test 5> According to the formulation shown in Table 3, the respective components were mixed to prepare a powder cosmetic. For each of them, 10 panelists compared the makeup and feeling of use with a certain general commercial product as a standard, and judged in 3 stages: ○: good, △: standard, ×: bad. The most frequent judgments were evaluated as the makeup retention and feeling of use of the sample.

[0074]

[Table 3]

The results are shown in Table 3. The cosmetics of the present invention were evaluated better than the comparative products in terms of makeup retention and feeling of use. Especially, the feeling of use was outstanding.

[0076]

The surface-treated powder of the present invention is excellent in water repellency and oil repellency as well as in touch to the skin, particularly in smoothness. Further, it can be produced by a simple method, has good reproducibility and high production efficiency. Further, since the amount of expensive fluorine compound (agent A) used can be reduced as compared with the conventional one, a low-priced product can be provided.

As the compound (agent A) having a perfluoroalkyl group and / or a perfluoropolyether group,
When selected from the phosphoric acid ester salt and the organosilicon compound, a surface-treated powder having particularly excellent effect persistence can be obtained. Further, when the agent A is selected from compounds having a perfluoropolyether group, a surface-treated powder having improved adhesion to the skin can be obtained.

When the surface treatment agent is further mixed with the agent C, the reproducibility is further increased, a uniform surface treated powder is obtained, and the feel on the skin is also greatly improved. Therefore, since a uniform treatment can be performed by a simple method, the product can be provided at a lower price.

The cosmetics of the present invention have good water resistance, sebum resistance and oil resistance, and have an excellent effect of preventing makeup deterioration due to sebum and the like (makeup lasting), good spreadability on the skin, and feeling of use,
Especially excellent in smoothness. Furthermore, since the raw material powder is available at a low price, the product can be provided at a low price.

Claims (9)

[Claims] 1. At least one or more compounds having a perfluoroalkyl group and / or perfluoropolyether group (hereinafter referred to as "A agent"), and at least one or more reactive organosilicon compounds. (Less than,
"B agent"), and a water- and oil-repellent powder obtained by treating the powder surface with a treatment agent containing 2. The organosilicon compound in which the agent A has a perfluoroalkyl group and / or a perfluoropolyether group, and a perfluoroalkyl group and / or a perfluoroalkyl group.
The water- and oil-repellent powder according to claim 1, which is selected from at least one selected from the group consisting of phosphate ester salts having a fluoropolyether group. 3. The water and oil repellent powder according to claim 1, wherein the agent A contains at least one compound having a perfluoropolyether group. 4. The water- and oil-repellent powder according to claim 1, wherein the agent B is selected from at least one selected from the group consisting of dimethicone derivatives, alkoxysilanes and silazanes. body. 5. 0.1 to 100 parts by weight of the base powder.
The water- and oil-repellent powder according to any one of claims 1 to 4, which is surface-treated with a treating agent containing 1 part by weight of agent A and 0.1-10 parts by weight of agent B. 6. The treatment agent further contains at least one surfactant (hereinafter, referred to as “C agent”) having a hydrocarbon chain having 12 or more carbon atoms. 5. The water- and oil-repellent powder according to any one of 1 to 5. 7. The agent C is an N-long chain acylamino acid salt,
The water- and oil-repellent powder according to claim 6, which is selected from at least one selected from the group consisting of lecithins, higher fatty acid salts, higher alcohol phosphate salts, long-chain acyl peptides, and dialkyl titanates. 8. 0.1-5 with respect to 100 parts by weight of the base powder.
The water- and oil-repellent powder according to claim 6, which is surface-treated with a treating agent containing part by weight of the C agent. 9. A cosmetic comprising the water- and oil-repellent powder according to any one of claims 1 to 8.