JP7488047B2 - Powder composition - Google Patents

Description

The present invention relates to a powder composition that is in powder form but is liquefied by rubbing during use.

Powder compositions that liquefy when rubbed into the skin consist of a base that has a structure in which liquid ingredients are enveloped in highly water- and oil-repellent powder, and while they have a powdery appearance, they liquefy when rubbed onto the skin during use. Such powder compositions provide a feel that corresponds to the properties of the liquid ingredients they contain, are stable during product manufacturing and transportation, and are suitable for portability, so they are preferably used in the cosmetics field.

For example, there are bases made by powdering aqueous components and hydrophobic powders to achieve a refreshing feel (Patent Documents 1 and 2), and bases made by powdering oily components and fluorine-treated powders to achieve a moist feel (Patent Documents 3 and 4). However, the former has the problem that it is not suitable for consumers with dry skin because it makes the skin feel squeaky after drying, and the latter has the problem that it is not suitable for younger consumers because it does not have a moist feel.

In order to solve the above problems, powdered cosmetics that contain both water and oil and have a powdery appearance but become liquid when rubbed during use have been developed (Patent Documents 5, 6, and 7). However, the base described in Patent Document 5 has low water and oil repellency due to the low water and oil repellency of the hydrophobic (silicone-treated) silica, which is a component of the base, and therefore only a small amount of polyhydric alcohol that reduces the surface tension of the water phase or oil that is compatible with the hydrophobic silica can be blended, so the moisturizing effect and reduction of the squeaky feeling were insufficient. In addition, the base described in Patent Document 6 can only be prepared with a large amount of powder or a large amount of fluid oil and silicone wax, and the water phase is small, so it does not satisfy the freshness and moisturizing properties. In addition, because the oil is solidified, there is little liquid feeling, and the characteristics of the base are not fully utilized. The base described in Patent Document 7 contains a surfactant as an essential component, so even though it uses a powder with high water and oil repellency, its effect is lost when applied to the skin. In addition, for consumers who are concerned about the irritation caused by surfactants and the environmental impact of synthetic surfactants and who have a high preference for safety and security, they are of low value. Furthermore, when the powder content is high compared to the amount of liquid phase such as water or oil, many consumers find it undesirable because it makes the skin dry.

JP2000-264813 JP2000-247823 JP2003-81733 Patent No. 5922287 JP 5-65212 A JP2006-117646 JP2001-158716

The present invention aims to provide a powder composition that contains a good balance of water and oil, has a moist feel when used, and is highly effective in suppressing dryness of the skin, while also having a fresh feel and good compatibility, and while it has a powdery appearance, it liquefies when applied to the skin, has no squeaky feeling, and is excellent in usability.

As a result of extensive research into solving the above problems, the inventors discovered that by combining a fluorine-treated powder, an oil-based component that is liquid at room temperature, and a specific aqueous component, a powder composition having novel properties that achieve the above objective can be obtained, thus completing the present invention.

That is, the present invention relates to a powdery composition containing (a) a fluorine-treated powder, (b) an oily component that is liquid at room temperature, and (c) an aqueous component having a surface tension value of 45 mN/m or more and 65 mN/m or less. Furthermore, the powdery composition of the present invention is characterized in that the blending amount of the (b) component is 1 to 50 mass %, and the blending ratio of the (b) component to the (c) component is 1:10 to 3:1. In addition, it is preferable that the powdery composition of the present invention is substantially free of a surfactant.

Although the powder composition of the present invention has a powdery appearance, it has the property of liquefying when applied to the skin, and contains a good balance of water and oil, which suppresses dryness of the skin and provides a pleasant feel when used without any squeaky feeling. In addition, since it has sufficient water and oil repellency, it can be used not only for skin care but also for makeup cosmetics that are difficult to remove due to sweat and sebum. Furthermore, since it has a stable powder form, it is excellent in suitability for production and transportation.

Each component constituting the cosmetic of the present invention will be described in detail below.
(a) Fluorine-treated powder The fluorine-treated powder (a) used in the present invention (hereinafter, sometimes simply referred to as "component (a)") broadly includes powders that have been given water- and oil-repellency by imparting fluorine groups to the powder surface, powders that themselves have fluorine groups and have water- and oil-repellency, etc. Specific examples include (i) treated powders in which a part or the whole of the powder surface is treated with molecules having fluorine groups, (ii) polymer powders containing fluorine groups, etc., but are not limited to these examples.

In the above (i), the molecule having a fluorine group is not particularly limited, but examples thereof include perfluoroalkyl phosphate diethanolamine salt represented by the following general formula (I), perfluoroalkyl silane represented by the following general formula (II), and perfluoroalkylethyl acrylate copolymer represented by the following general formula (III).

In the formula, n is an integer from 5 to 20, and m is 1 or 2.

In the formula, a represents an integer from 1 to 12, b represents an integer from 1 to 5, and X represents a halogen atom, an alkyl group, or an alkoxy group.

In the formula, c represents an integer from 1 to 12, d represents an integer from 5 to 20, and Y represents an alkyl copolymer containing polyethylene glycol, silicone chains, acrylic groups, etc.

In addition, compounds having a perfluoropolyether group, such as perfluoropolyether dialkyl phosphate and its salt, perfluoropolyether dialkyl sulfate and its salt, perfluoropolyether dialkyl carboxylic acid and its salt, etc., can also be used. Here, the term "perfluoropolyether group" refers to a group having at least two oxygen atoms bonded to a perfluoroalkylene or perfluoroalkyl, and those having a molecular weight of about 300 to 7000 are preferred from the viewpoint of oil and water repellency.

The method of fluorination treatment is not particularly limited, but examples include the following method: An aqueous solution of a fluorine compound is gradually added to an aqueous dispersion of the powder to be treated, and then an aqueous solution of hydrochloric acid is added to adjust the acidity, and the mixture is aged for about 2 hours, after which it is filtered, dried, and pulverized to obtain a fluorine-treated powder.

In addition, if the powder surface has been surface-treated to impart water- and oil-repellency by adding fluorine groups, it may also be further treated to add other non-fluorine groups, such as alkyl groups, silicone groups, or hydrophilic groups, as long as this does not impair the effects of the present invention.

In the present invention, before the fluorine treatment, the powder surface may be treated with at least one gel selected from hydrates, partial dehydrates, and anhydrides of metal hydroxides or metal salts. By performing the fluorine treatment after the metal treatment in this way, the formation of a coating of the fluorine compound can proceed stably and efficiently, and a fluorine-treated powder with excellent water and oil repellency can be produced. In addition, when a powder that has been fluorinated after the metal treatment is used, the impact stability (impact resistance) is significantly improved. It is also excellent in the effect of improving adhesion to the skin, etc.

The metal hydroxide or metal salt is preferably one or more metal hydroxides or salts selected from magnesium, aluminum, silicon, titanium, zinc, zirconium, and barium. From the viewpoint of improving impact stability (impact resistance) and adhesion to the skin, it is particularly preferable to subject the powder surface to an aluminum hydroxide precipitation treatment.

For example, metal treatment of powder surfaces involves adding water to the powder to form a slurry, to which is added an aqueous solution of a highly ionic water-soluble compound of each of the metals mentioned above, such as aluminum chloride, sodium aluminate, aluminum sulfate, sodium silicate, magnesium chloride, magnesium sulfate, barium chloride, zirconium chloride, titanium tetrachloride, water-soluble organic titanium, titanyl sulfate, zinc chloride, zinc sulfate, etc., and allowing these compounds to adsorb to the powder surface. An acid or alkali solution is then added to cause hydrolysis or substitution reactions of the compounds adsorbed to the powder surface, producing hydrates, partial dehydrations, or anhydrides of the metal hydroxides or metal salts mentioned above.

Next, an emulsion of a fluorine compound and water is gradually added to the powder with the metal surface treated, and the emulsion is broken down by adding an acid or leaving it at high temperature, thereby making it possible to further coat the powder coated with the metal hydroxide or hydrate, partially dehydrated or anhydrous metal salt with the fluorine compound.

The less the metal hydroxide or metal salt hydrate, partial dehydrate, or anhydride that coats the powder, the better, and the amount of metal compound that generates these relative to the powder is preferably 1 to 30% by mass. If it is less than 1% by mass, the coating of the fluorine compound is insufficient, making it difficult to achieve water and oil repellency, while if it is more than 30% by mass, the powder becomes bulky and tends to inhibit the original function of the powder.

The amount of the fluorine compound used in the fluorine treatment is also preferably 1 to 30% by mass relative to the powder. If it is less than 1% by mass, the coating of the fluorine compound is insufficient, making it difficult to achieve water and oil repellency, while if it is more than 30% by mass, the powder becomes bulky and tends to inhibit the original functions of the powder.

As the powder to be treated, clay mineral powder is preferably used in terms of usability (no squeaky feeling, no dryness of the skin, etc.) and stability against impact. Either natural or synthetic clay mineral powder can be used. Examples of clay mineral powder include talc ₍ hydrated magnesium _silicate ; _{3MgO.4SiO2.H2O} ), kaolin (hydrated aluminum silicate; _{Al2O3.2SiO2.2H2O} ), _anhydrous silicic acid ( _SiO2 ), saponite (hydrated magnesium aluminum _silicate ; _{SiO2.Al2O3.MgO} , water mixture ₎ , sericite ( _{microcrystalline} hydrated potassium aluminum silicate; _{K2O.3Al2O3.6SiO2} , _2H2O ), mica ₍ hydrated _potassium aluminum _silicate ; _{KAl2.AlSi3O10} (OH) ₂ ) _, etc. Preferably, one or more clay minerals selected from talc, kaolin, silicic anhydride, saponite, sericite, and mica are used. By using these clay minerals, the powder form can be maintained while the component (b) can be blended at a higher concentration, and usability (no squeaky feeling, no dry skin, etc.) can be further improved.

In addition, composite pigments such as titanium oxide sericite, which is a clay mineral coated with titanium oxide, can also be used as the powder component to be treated.

There are no particular limitations on the shape of the powder to be treated, and any shape can be used, such as plate-like, spherical, porous, etc. Among these, plate-like powders are preferably used because they can efficiently powderize oil with a small amount of powder.

Furthermore, examples of polymer powders in which the powder itself contains fluorine groups include polytetrafluoroethylene powder.

In the present invention, the amount of component (a) is about 10 to 65% by mass, preferably about 20 to 60% by mass, and more preferably about 30 to 50% by mass, based on the total amount of the composition. If the amount is less than 10% by mass, the liquid component cannot be powdered, and if it exceeds 65% by mass, a strong squeaking sensation is felt and the feeling of use is poor.

Examples of the fluorine-treated powder (a) used in the present invention include sericite treated with PF, PFX or FHS, synthetic mica, natural mica, titanium oxide, talc, boron nitride, hydroxyapatite (plate-shaped HAP-SC, manufactured by Taihei Chemical Industry Co., Ltd.), hydroxyapatite-coated mica (Apamicron MA10Y25S, manufactured by Sekisui Chemical Industry Co., Ltd.), titanium oxide-coated mica, barium sulfate/titanium oxide-coated mica (Low Laster Pigment, manufactured by Merck & Co., Ltd.), barium sulfate (plate-shaped barium sulfate HM, manufactured by Sakai Chemical Industry Co., Ltd.), titanium oxide-coated mica (Timilon Super Red (manufactured by Merck & Co., Ltd.), Flamenco Red (manufactured by BASF)), and the like.

In addition, when powder components other than component (a) are contained, the blending ratio of component (a) to the total powder components is preferably 50 to 100 mass%.

(b) Oily component that is liquid at room temperature The (b) oily component that is liquid at room temperature (hereinafter, may be simply referred to as "component (b)") of the present invention is not particularly limited, and any component that is used in cosmetics, quasi-drugs, pharmaceuticals, etc. may be used without any problems, and may be a mixture of one type or two or more types of oily components.

Component (b) is preferably, for example, liquid paraffin, ozokerite, squalene, pristane, paraffin, ceresin, squalane, hydrocarbon oils such as petrolatum, liquid lanolin, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, Isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexyl acid, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexyl acid, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexyl acid, trimethylolpropane triisostearate, Glyceryl 2-ethylhexanoate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glycerin trimyristate, tri-2-heptylundecanoic acid glyceride, castor oil fatty acid methyl ester, oleic acid, acetoglyceride, palmitic acid-2-heptylundecyl, diisopropyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate Examples of the oil include polar oils such as ethyl acetate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, ethyl acetate, butyl acetate, amyl acetate, triethyl citrate, and ethyl 2-ethylhexanoate, higher alcohols such as stearyl alcohol, behenyl alcohol, oleyl alcohol, and cetostearyl alcohol, and vegetable oils such as jojoba oil, olive oil, nut oils, safflower oil, and soybean oil. Among these, particularly preferred are liquid paraffin, which has a relatively high surface tension value, and vegetable oils such as jojoba oil.

It is further preferable that the (b) component of the present invention does not contain solid oils such as wax or wax, from the viewpoint of the liquid feeling when applied to the skin.

The amount of component (b) is preferably 1 to 50% by mass, more preferably 3 to 40% by mass, and even more preferably 5 to 35% by mass, based on the total amount of the composition. If the amount of component (b) is less than 1% by mass, it may not blend well with the skin or provide sufficient moisturizing effects, and the powder may feel too squeaky. On the other hand, if the amount is more than 50% by mass, the texture becomes oily and the feel of use becomes poor.

(c) Aqueous component having a surface tension value of 45 mN/m to 65 mN/m The aqueous component (c) having a surface tension value of 45 mN/m to 65 mN/m (hereinafter, sometimes simply referred to as "component (c)") used in the present invention refers to an aqueous component obtained by dissolving various moisturizing agents, drugs, etc. in distilled water, ion-exchanged water, or purified water of a quality generally used in cosmetics, and has a surface tension value of 45 mN/m to 65 mN/m, preferably 47 mN/m to 65 mN/m. Here, "surface tension value of component (c)" refers to the value obtained by measuring the surface tension of the entire liquid component (c) by the Wilhelmy plate method using a surface tension measuring device DCAT (manufactured by Eiko Seiki Co., Ltd.). As long as the surface tension value of component (c) as a whole satisfies the above range, each aqueous component constituting component (c) may be used even if it does not satisfy the above range of surface tension value.
If the surface tension value of component (c) is less than 45 mN/m, it easily undergoes phase inversion (a state in which the powder is dispersed in the liquid) upon impact, becoming a paste containing air, making it difficult to stably powderize it with component (a).If the surface tension value exceeds 65 mN/m, the composition does not blend well with the skin when rubbed onto the skin.

The amount of component (c) is preferably 15 to 70% by mass, more preferably 15 to 65% by mass, and even more preferably 20 to 60% by mass, based on the total amount of the composition. If the amount of component (c) is less than 15% by mass, the moist feeling is lost. On the other hand, if it exceeds 70% by mass, the moist feeling is lost, which is not preferable.

Substances that can be mixed with the aqueous phase to adjust the surface tension to an appropriate value include lower alcohols, polyhydric alcohols, sugar alcohols, and polypropylene glycol-polyethylene glycol copolymer dimethyl ether.

Examples of lower alcohols include ethanol and isopropanol.

Examples of polyhydric alcohols include dihydric alcohols (e.g., propylene glycol, 1,3-butylene glycol, etc.); trihydric alcohols (e.g., glycerin, etc.); tetrahydric alcohols (e.g., pentaerythritol such as 1,2,6-hexanetriol, etc.); pentahydric alcohols (e.g., xylitol, etc.); polyhydric alcohol polymers (e.g., dipropylene glycol, triethylene glycol, polyethylene glycol, etc.). In particular, polyethylene glycols with an average molecular weight of 100,000 or less, specifically polyethylene glycol 400, polyethylene glycol 4000, etc., are preferably used.

Also included are sugar alcohols (e.g., sorbitol, mannitol, etc.); polyethylene glycol derivatives (e.g., polyethylene glycol diacrylate, polyethylene glycol dioleate, polyethylene glycol diacetate, etc.); polypropylene glycol-polyethylene glycol copolymer dimethyl ether (e.g., polypropylene glycol (2 mol)-polyethylene glycol (9 mol) copolymer dimethyl ether, polypropylene glycol (7 mol)-polyethylene glycol (14 mol) copolymer dimethyl ether, polyoxyethylene (14 mol) polypropylene (7 mol) random copolymer, etc.); alkyl benzoates (e.g., diethoxyethyl succinate, diethoxyethyl malonate, etc.), polyoxyethylene fatty acid glycerin (e.g., polyoxyethylene (9 mol) glycerin propionate, polyoxyethylene (9 mol) glycerin caprate, etc.), divalent dineopentyl carboxylate (e.g., dineopentyl succinate, dineopentyl glutarate, etc.), etc.

The blending ratio of components (b) and (c) is preferably 1:10 to 3:1. If the blending ratio of component (b) is too high, it will give an oily feel, which is undesirable. Also, if the blending ratio of component (c) is too high, it will not give a moist feel, which is undesirable.

The powder composition of the present invention is preferably substantially free of surfactants. The powder composition of the present invention can contain a relatively large amount of oil without the inclusion of a surfactant. If a surfactant is present in the composition, the water- and oil-repellency effects derived from the powder may be reduced.

The powder composition of the present invention is prepared by spray mixing the component (a) with the component (b) which is an oil phase, and then spraying the component (c) (aqueous phase). It is not important whether the oil phase or the aqueous phase is sprayed first.

In addition to the component (a), the powder composition of the present invention may contain, as a powder component, a powder that has not been fluorine-treated, or a drug or the like in powder form, as long as the effect of the present invention is not impaired.

In addition, various optional ingredients used in ordinary cosmetics, such as fragrances, various powders, oil-soluble medicinal ingredients, etc., can be blended within the range that does not impair the effects of the present invention. Of these optional ingredients, oil-soluble vitamins such as vitamin A and its derivatives, sterols, natural and synthetic fragrances, ultraviolet absorbers, and poorly water-soluble substances may be blended in the oil component, and water-soluble substances may be blended in the aqueous component.

The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following examples. Note that unless otherwise specified, the blending amount is expressed as mass % of the total amount.

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

[Usability (no creaking sensation)]
The usability (freedom from squeaking sensation) of each of the Example products and Comparative Example products was judged and evaluated by a panel (50 people) in an actual use test according to the following criteria.
(Judgment criteria)
Extremely effective: No squeaking Effective: Slight squeaking, but not enough to cause problems in use Somewhat effective: Slight squeaking Ineffective: Extremely squeaking (Evaluation)
A: 80% or more of the subjects rated the drug as excellent, effective, or somewhat effective. B: 50% to less than 80% of the subjects rated the drug as excellent, effective, or somewhat effective. C: 30% to less than 50% of the subjects rated the drug as excellent, effective, or somewhat effective. D: Less than 30% of the subjects rated the drug as excellent, effective, or somewhat effective.

[Usability (ease of use, freshness)]
The usability (goodness of familiarity, freshness) of each of the Example products and Comparative Example products was judged and evaluated according to the following criteria in an actual use test by a panel (50 people).
(Criteria: familiarity)
Extremely effective: Blends well with skin Effective: Blends well with skin Somewhat effective: Blends poorly with skin Ineffective: Blends poorly with skin (criteria: freshness)
Extremely effective: Very moist Effective: Somewhat moist Somewhat effective: Not very moist Ineffective: Not moist at all (rating)
A: 80% or more of the subjects rated the drug as excellent, effective, or somewhat effective. B: 50% to less than 80% of the subjects rated the drug as excellent, effective, or somewhat effective. C: 30% to less than 50% of the subjects rated the drug as excellent, effective, or somewhat effective. D: Less than 30% of the subjects rated the drug as excellent, effective, or somewhat effective.

[Suppression of dryness]
The dryness-inhibiting effect of each of the Example products and Comparative Example products was judged and evaluated according to the following criteria in a 3-day practical use test by a panel (50 people).
(Judgment criteria)
Extremely effective: Dryness was greatly suppressed. Effective: Dryness was slightly suppressed. Slightly effective: Dryness was slightly suppressed, but not much changed. Ineffective: Dryness got worse (rating)
A: 80% or more of the subjects rated the drug as excellent, effective, or somewhat effective. B: 50% to less than 80% of the subjects rated the drug as excellent, effective, or somewhat effective. C: 30% to less than 50% of the subjects rated the drug as excellent, effective, or somewhat effective. D: Less than 30% of the subjects rated the drug as excellent, effective, or somewhat effective.

[Water resistance effect]
A base containing an ultraviolet absorber was prepared, a certain amount was applied to a PMMA plate, and the UV spectrum was measured. The plate was washed with water, and the UV spectrum was measured one minute later. The ratio of the integral value of the spectrum before washing was set to 1 was calculated.

[Measurement of surface tension value]
Using a platinum Wilhelmy plate, the surface tension was measured with a surface tension measuring device DCAT (manufactured by Eiko Seiki Co., Ltd.) When solid oil was contained in the oil phase, it was dissolved at 80° C. before measurement.

[Impact resistance]
1 g of the prepared base was placed in a 30 ml resin container and shaken with a paint shaker to measure the time it took for the base to become a paste. A longer time required for the base to become a paste indicates higher impact resistance.

[Transportation Test]
3 g of the prepared base was placed in a 30 ml resin container, and 10 of these were placed in a cardboard box of approximately 30 cm x 20 cm x 10 cm without packing, and transported by truck between Tokyo and Osaka. If one or more of the boxes were in a paste state, the box was deemed to have failed (failed).

(Example 1, Comparative Examples 1 to 3)
Powdered cosmetics were prepared with the compositions shown in Table 1 below. Using the above test methods, each cosmetic was evaluated for powderability, usability (lack of squeaky feeling, freshness, and familiarity), water resistance, time until it becomes a paste (impact resistance), and transportation test. Note that the fluorine-treated mica in Table 1 used was "EPF MICA S" (manufactured by Daito Chemical Industry Co., Ltd.), the fluorine-treated synthetic titanium oxide used was "FSA-3 TiO2 CR-50" (manufactured by Daito Chemical Industry Co., Ltd.), and the silicone-treated talc used was a mixture of "SA-Talc JA-13R" (manufactured by Miyoshi Chemical Industry Co., Ltd.) and "SA-Talc JA-46R" (manufactured by Miyoshi Chemical Industry Co., Ltd.).

(Production method)
The oil phase prepared by mixing and dissolving (4) to (6) was sprayed onto the powders of (1) to (3), mixed and stirred, and then the aqueous phase prepared by mixing (7) to (9) was further sprayed onto the powders, mixed, stirred, and filled into a container.

As is clear from the results in Table 1, when silicone-treated powder was mainly blended as component (a) (Comparative Example 1), the cosmetic could not be powdered. When the surface tension value of the aqueous phase was less than 45 mN/m and a surfactant was included (Comparative Example 2), the water resistance was low, and the stability evaluation expressed by the time to become a paste and the transportation test was poor. When the oil phase contained solid oil (Comparative Example 3), the transportation stability was poor, and usability such as freshness and compatibility with the skin tended to decrease. The composition of Comparative Example 3 did not become a paste in the impact resistance test, but aggregation was observed over time. On the other hand, the cosmetic of the present invention (Example 1) was sufficiently powdered, and was also excellent in usability, water resistance, and stability.

(Examples 2 and 3, Comparative Examples 4 to 7)
Powdered cosmetics were prepared with the compositions shown in Table 2 below. Using the test methods described above, each cosmetic was evaluated for usability (freedom of squeaky feeling, freshness, and familiarity), dryness suppression effect, time until it becomes a paste (impact resistance), and transportation test. The fluorine-treated sericite in Table 2 used was "PF-10 AL-10 Sericite FSE" (manufactured by Daito Kasei Kogyo Co., Ltd.).

(Production method)
(2) to (4) were mixed, and the dissolved oil phase was sprayed onto the powder of (1), mixed and stirred, and then the aqueous phase of (5) to (9) was further sprayed onto the powder, mixed and stirred, and filled into a container.

As is clear from the results in Table 2, when the surface tension value of the aqueous phase is less than 45 mN/m (Comparative Example 4), the effect of suppressing dryness is low, and both the time to become a paste and the stability evaluation represented by the transport test are poor, and when the surface tension value of the aqueous phase is more than 65 mN/m (Comparative Example 5), the effect of blending with the skin and suppressing dryness is low. Also, even if the surface tension value of the aqueous phase is 45 mN/m or more and 65 mN/m or less, when the amount of (b) oil-based component is small (Comparative Example 6), the usability is poor, and when the amount of (c) aqueous component is small (Comparative Example 7), the freshness and blendability are lacking, and the transport stability is also somewhat poor. On the other hand, when the surface tension value of the aqueous phase is 45 mN/m or more and 65 mN/m or less, and the amounts of (b) and (c) components are adjusted to the preferred range, a cosmetic product with good usability and stability was obtained (Examples 2 and 3).

(Examples 4 and 5)
A skin care powder (Example 4) and a body powder for the décolleté (Example 5) having a sunscreen effect were prepared using the compositions shown in Table 3. The fluorine-treated talc and fluorine-treated titanium oxide in Table 3 were the PFX-10 series (both manufactured by Daito Kasei Kogyo Co., Ltd.), in which talc and fine particle titanium oxide were treated with aluminum hydroxide, and then the surface of the perfluoroalkyl phosphate ester sericite was treated.

(Production method)
(6) to (9) were mixed and dissolved in an aqueous phase, which was then sprayed onto the powders of (1) and (2), followed by mixing and stirring. Then, an oil phase prepared by mixing (3) to (5) was further sprayed onto the powders, followed by mixing and stirring, and the mixture was filled into a container.

As is clear from the results in Table 3, all cosmetics had excellent feel when used and excellent water resistance.

(Example 6)
A powdery foundation was prepared using the composition shown in Table 4 below. The fluorine-treated titanium oxide in Table 4 was "PFX-5 titanium oxide" (manufactured by Daito Kasei Kogyo Co., Ltd.), which is titanium oxide treated with aluminum hydroxide and surface-treated with perfluoroalkyl phosphate ester.

(Production method)
The homogeneously dissolved components (6) and (7) were sprayed onto the homogeneously mixed components (1) to (5), and the mixture was mixed and stirred. The homogeneously dissolved components (8) to (11) were sprayed onto the mixture, and the mixture was mixed and stirred, and then filled into a container.

As is clear from the results in Table 4, although it was a powdery foundation, it turned into a liquid on the skin and had a fresh, comfortable feel.

Claims (5)

(a) a fluorine-treated powder;
(b) 1 to 50% by mass of an oil component that is liquid at room temperature;
(c) containing 15 to 70% by mass of an aqueous component having a surface tension value of 45 mN/m or more and 65 mN/m or less, and the blending ratio of the (b) component to the (c) component is 1:10 to 3:1;
The component (b) does not contain a solid oil and is preferably liquid paraffin , squalene, pristane , squalane , liquid lanolin, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, hexyl laurate, decyl oleate , hexyldecyl dimethyloctanoate , isocetyl stearate , isocetyl isostearate, ethylene glycol di-2-ethylhexylate , N-alkyl glycol monoisostearate , neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexylate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexylate, glyceryl tri-2-ethylhexanoate, cetyl and an oily component containing one or more selected from the group consisting of ethylhexyl-2-ethylhexanoate, 2-ethylhexyl palmitate , tri-2-heptylundecanoic acid glyceride , oleic acid, acetoglyceride, 2-heptylundecyl palmitate, diisopropyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, ethyl acetate, butyl acetate, amyl acetate, triethyl citrate, ethyl 2-ethylhexanoate , fragrances, various powders, oil-soluble medicinal components, ultraviolet absorbers, and substances poorly soluble in water;
The component (c) is an aqueous component containing one or more selected from lower alcohols, polyhydric alcohols , polypropylene glycol-polyethylene glycol copolymer dimethyl ether, diethoxyethyl succinate, diethoxyethyl malonate , and water-soluble substances.
A powdery composition which is liquefied when rubbed. The powder composition according to claim 1, wherein the powder of component (a) is one or more selected from the group consisting of talc, kaolin, silicic anhydride, saponite, sericite, and mica. The powder composition according to claim 1 or 2, containing 10 to 65 mass% of component (a). The powder composition according to any one of claims 1 to 3, containing 15 to 70 mass% of component (c). A step of spraying component (b) onto component (a), and a step of spraying component (c) onto the powder prepared in the previous step; or
A step of spraying component (c) onto component (a), and a step of spraying component (b) onto the powder prepared in the previous step;
A method for producing the powdered composition of claim 1, comprising: