JP2000154116A - Powdery or solid cosmetic containing water- and oil- resistant powder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject cosmetic excellent in spreadability when applied to the skin, feel of touch and adhesiveness, and therefore excellent in makeup sustainability by formulating water- and oil-resistant powder in a cosmetic needing resistance to both water and oil. SOLUTION: This powdery or solid cosmetic excellent in makeup sustainability by including water- and oil-resistant powder which is prepared by coating power with 1.0-10.0 wt.% of a water-resistant compound such as a silicone oil or fluorine compound followed by further coating the resultant surface with a water-soluble film-forming polymer such as polyvinylpyrrolidone or vinyl acetate-vinylpyrrolidone copolymer.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic containing water- and oil-resistant powder. More specifically, powder or solid cosmetics that have good elongation, feel, and adhesion when applied to the skin and are excellent in stickiness by incorporating the substance of the present invention into cosmetics that require water resistance and oil resistance. Offer a fee. [0002] Conventionally, many studies have been made on hydrophobization of hydrophilic powders such as mica and talc. For example, the surface of a hydrophilic inorganic powder is treated with a fatty acid, metal soap, silicone oil, or the like to make the surface of the inorganic powder water-resistant. For the purpose of simultaneously imparting water resistance and oil resistance, the surface of the inorganic powder is coated with a fluorine compound. However, it is generally easy to impart water resistance to powder, but it is difficult to impart sufficient oil resistance. For example, Japanese Patent Application Laid-Open No. 62-250074 discloses that a water- and oil-resistant powder is obtained by performing a surface treatment using a fluoroalkyldi (oxyethyl) amine phosphate ester. JP-A-2-175759
In Japanese Patent Application Laid-Open Publication No. H11-157, it is proposed to treat the surface of silica with a silazane compound having a perfluoroalkyl group. JP-A-2-218603 proposes treating the surface of an inorganic powder with a perfluoroalkylsilane and blending it with a cosmetic. However, when plate-like inorganic powders such as sericite, mica, and talc are directly treated with perfluoroalkylsilane, the reactivity between perfluoroalkylsilane and the plate-like inorganic powder is poor.
Although having water resistance, there was a problem that a powder excellent in oil resistance could not be obtained. As described above, when the powder directly surface-treated with a fluorine compound is contained in the cosmetic,
As expected, sebum resistance cannot be improved, and surface treatment results in poor elongation, spread, and poor adhesion to the skin. There was a problem. JP-A-6-192594 proposes a method in which a plate-like inorganic powder is first coated with an inorganic oxide, and the surface thereof is further coated with a perfluoroalkylsilane. The purpose of this is to improve the reactivity of perfluoroalkylsilane, which is a problem of JP-A-2-218603, by performing inorganic oxide coating in advance. Conventionally, fluorine compounds used to obtain water resistance and oil resistance simultaneously,
It is expensive, and it is required to use an advanced technique rather than technically simple in order to sufficiently obtain the expected effect, leading to an increase in cost. [0004] Therefore, the present invention can be manufactured at a relatively low cost, particularly without using advanced techniques, and has a high elongation when applied to the skin after being formulated into a cosmetic. It is an object of the present invention to provide a powder excellent in water resistance and oil resistance maintaining good feel and adhesion, and to provide a powder or a solid cosmetic containing the same and having excellent makeup. Means for Solving the Problems The inventors of the present invention have conducted intensive studies in order to achieve the above-mentioned object, and as a result, have found that silicone oil or fluorine compound is formed around powder such as sericite, mica, and talc. It has been found that the object can be easily achieved when the surface is subjected to a hydrophobic treatment and the surface is further coated with a water-soluble film-forming polymer, and the present invention has been completed.
That is, the present invention relates to a processing technique for obtaining a water-resistant and oil-resistant powder, a powder containing the same, and having excellent makeup, and a solid cosmetic. Hereinafter, the present invention will be described in detail. Water-resistant oil-resistant powder of the present invention, silicone oil to obtain water resistance,
Alternatively, it is intended to impart oil resistance by performing a coating treatment on a powder treated with a fluorine compound or the like with a water-soluble film-forming polymer. This is not the oil resistance due to oleophobicity, which has been conventionally studied, but the oil resistance due to the effect of fixing a polymer film that does not dissolve in an oily substance to the skin. Regarding the oil resistance obtained by oleophobicity by the fluorine compound treatment, the perfection of the treatment and the low surface tension of the fluorine compound itself are important factors. In order to make this factor sufficient, technically advanced techniques such as forming an oxide film on the powder surface, and expensive fluorine compounds such as perfluoroalkylsilane and fluoroalkyldi (oxyethyl) amine phosphate ester It has been studied to reduce the surface tension by using. Therefore, the present inventors have found that an oil-resistant film can be obtained by blending a water-soluble film-forming polymer that is not compatible with an oily component into a water-based cosmetic into a cosmetic, so that a non-aqueous powder, and It was investigated whether mixing a water-soluble film-forming polymer into a solid cosmetic would achieve the goal of having an excellent makeup with sweat and sebum resistance.
Here, the water-soluble film-forming polymer needs a sufficient amount of water to form a uniform film, but the supply source thereof is water evaporating from the skin, sweat, and water of the makeup base. As a result of examining the above-mentioned contents, it was possible to obtain a powder or solid cosmetic having an oil-resistant film and excellent sebum resistance by adding a water-soluble film-forming polymer. In particular, the combination of silicone oil having a sufficient hydrophobicity, a powder treated with a fluorine compound, and a water-soluble film-forming polymer increased sweat and sebum, and improved the cosmetic feel.
However, when actually blended in cosmetics, the powder of the water-soluble film-forming polymer of a commercially available grade usually has a large particle size, and thus causes a problem in usability such as roughness. Also, the larger the particle size, the lower the solubility, and a uniform film could not be formed. Therefore, it was examined to incorporate a water-soluble film-forming polymer having reduced discomfort in use and improved solubility by making the particles finer. However, in the production method such as spray drying, it is difficult to produce fine particles due to the problem of the viscosity of the solution, and sufficiently small particles cannot be obtained by pulverization into fine particles. In addition, there are other problems such as easy formation of secondary particles and poor usability in producing cosmetics due to soaring due to fine particles. [0007] In order to solve the above problems, it has been studied to coat the powder surface with a water-soluble film-forming polymer using a solvent after the powder has been subjected to a hydrophobic treatment. As a result, the water-soluble film-forming polymer was redissolved during use, whereby a film was formed on the skin and the hydrophobized powder was fixed, and sufficient water and oil resistance could be obtained. Since the substance of the present invention has sufficient solubility since each particle itself is coated with a thin film-forming substance, uniform film formation was obtained even with a small amount of water, and the oil resistance was good. Further, by using a non-aqueous solvent such as ethyl alcohol, the coating treatment on the hydrophobic powder can be easily performed. Further, the treated powder does not impair the transparency, elongation, feel, good adhesion and the like of the powder. The non-aqueous cosmetic containing the powder obtained here is a powder or solid cosmetic that retains good stretchability, feel and adhesion when applied to the skin and has excellent makeup. Hereinafter, the present invention will be described in detail.
In the water- and oil-resistant powder of the present invention, the water-soluble film-forming polymer to be subjected to the coating treatment is preferably one having excellent oil resistance and high film strength as much as possible, such as polyvinylpyrrolidone (hereinafter abbreviated as PVP), and vinyl acetate / vinyl. Pyrrolidone copolymer (hereinafter abbreviated as PVP / VA) and the like are preferred.
In addition, PVP and PVP / VA have good compatibility with non-aqueous solvents such as ethyl alcohol, and have low reactivity and low prescription flexibility because they have no ionicity. The water-soluble film-forming polymer has a coating amount in the range of 0.1 to 20.0% by weight based on the hydrophobized powder, and more preferably 1.0 to 10.0%. % By weight. If the content is less than 0.1% by weight, sufficient film formation cannot be obtained.
If it is 20.0% by weight or more, the amount of the solvent at the time of processing becomes too large, so that it is not practical. In the water- and oil-resistant powder of the present invention, the powder used as the base material may be any one usually used in cosmetics, such as sericite, mica, and talc. Examples include artificial mica such as silicon mica and teniolite, and powder such as glass flake and crystalline cellulose.
These powders have a mean particle size of about 3 to 50 μm. The hydrophobic treatment may be any treatment having sufficient water resistance, such as a methylpolysiloxane treatment, a methylhydrogenpolysiloxane treatment, a metal soap treatment, a perfluoroether treatment,
A perfluoroalkylsilane treatment or a fluoroalkyldi (oxyethyl) amine phosphate ester treatment is preferably used. In the present invention, the amount of the hydrophobizing agent is set to 1.0 to 10.0% by weight with respect to the powder, for the following reason. That is, if the content is less than 1.0% by weight, sufficient water resistance cannot be obtained, and if the content is more than 10.0% by weight, the cost of raw materials increases, which is not practical. The method of treating the water-soluble film-forming polymer on the hydrophobized powder is, for example, a ball mill, a kneader, a mixing and stirring device such as a disper, the hydrophobized powder,
The method is carried out by mixing a polymer in which a water-soluble film-forming polymer is dissolved in a solvent in advance, uniformly dispersing the mixture, heating and drying under normal pressure or reduced pressure, and removing the solvent. After that, the secondary particles may be broken using a pulverizer such as a ball mill, a hammer mill, or a jet mill to adjust the particle size. Next, the cosmetic of the present invention will be described in detail. The cosmetic of the present invention is blended with the above-mentioned water- and oil-resistant powder. It is preferably 1.0 to 90.0% by weight of the whole, and particularly preferably 5.0 to 70.0% by weight. That is, when the content of the water- and oil-resistant powder in the cosmetic is less than 1.0% by weight, the water resistance and oil resistance of the decorative film are not sufficient, and the cosmetic film is derived from good stretch, spread and adhesion. Improvement of makeup stickiness and makeup paste cannot be expected much. The upper limit of the content of the water- and oil-resistant powder in the powder or the solid cosmetic is not particularly limited, but other components to be blended in the cosmetic, for example, oil, powder other than the water- and oil-resistant powder 90.0% by weight or less is usually used in view of the relationship with the like. In addition, the powder or solid cosmetics referred to in the present invention are usually makeup cosmetics, such as powder, powder press, and cast. And, in the present invention, there is provided a powder or a solid cosmetic which is excellent in a moisturizing effect having an effect on sweat resistance and sebum resistance by containing the above-mentioned water- and oil-resistant powder. Specific examples of cosmetics provided in this manner include, for example, pressed powder, powder foundation, face powder, two-way cake, powder eye color, powder cheek, powder lip, lipstick, pouring foundation, pouring eye color, and the like. Makeup cosmetics can be given. In the present invention, various components can be blended according to the purpose of use. Of course, components are appropriately selected for the purpose of use. Surfactants as emulsifying, solubilizing and dispersing agents, for example, POE fatty acid esters, polyglycerin fatty acid esters, POE higher alcohol ethers,
POE. Nonionic surfactants such as POP block polymers, anionic surfactants such as fatty acid potassium, fatty acid sodium, higher alkyl sulfates, alkyl ether sulfates, acyl sarcosinates, sulfosuccinates, etc .; There are cationic surfactants such as trimethylammonium salt, dialkyldimethylammonium salt, alkylpyridinium salt, and benzalkonium chloride, and imidazoline-based and betaine-based amphoteric surfactants can be blended. Oils can be blended as long as they can be used in ordinary cosmetics.Vegetable oils include olive oil, jojoba oil, castor oil, rice bran oil, coconut oil, etc., and animal oils include squalane, tallow, lanolin, etc. As the silicone oil,
Polyisobutene, fatty acid esters, fatty acid glycerin, etc., as waxes, beeswax, mocro, candelilla wax, carnauba wax, etc., as hydrocarbons, liquid paraffin, ceresin, microcrystalline wax, vaseline, etc. Higher fatty acids such as octyldodecanol include stearic acid, lauric acid, myristic acid,
Oleic acid and other powders to be compounded for the purpose of coloring agents such as silicone resin, silicone rubber, perfluoroether and the like are usually used in cosmetics and include organic dyes (Blue No. 1, green No. 3, red 202
No., Red No. 227, Yellow No. 4 and their lakes), inorganic pigments (iron oxide, titanium oxide, chromium oxide, zinc oxide, etc.), extender pigments (sericite, mica, talc, nylon powder, cellulose powder, silicone) powder,
Polyalkyl acrylate, calcium phosphate, boron nitride, etc.), pearl (titanium oxide-treated mica, titanium oxide.
Iron oxide treated mica, titanium oxide. Navy blue mica, etc.)
And natural pigments such as chlorophyll and β-carotene. One or more of these may be arbitrarily selected and used. In addition, these powders may be subjected to surface treatment and compounding for the purpose of improving hydrophobicity, decreasing catalytic activity, and improving lubricity. This surface treatment, as a substance used in the case of composite, silicic anhydride, titanium oxide, nylon, polyalkyl acrylate,
Examples include fluorine compounds, metal soaps, oils and fats, fatty acid esters, and the like. The powder or solid cosmetic of the present invention may be a gum, a natural water-soluble compound and its derivatives, a preservative, a chelating agent, an antioxidant, and a humectant, in addition to the above components, as long as the stability of the system is not impaired. , Lower alcohols, polyhydric alcohols, fragrances, cooling agents, pH regulators, UV inhibitors, and the like. Next, the present invention will be described more specifically with reference to examples. However, these examples do not limit the present invention. Example 1 For 95 g of methyl hydrogen treated sericite,
A solution prepared by dissolving 5 g of polyvinylpyrrolidone in 20 g of ethyl alcohol was mixed well in a mortar. Next, the mixture was dried at 60 ° C. for 3 hours and then crushed again in a mortar.
Thereafter, the particles were pulverized using a hammer mill to adjust the particle size, thereby obtaining a water- and oil-resistant powder of the present invention. Example 2 To 96 g of talc, 4 g of a methylhydrogensiloxane / dimethylsiloxane copolymer and 200 g of dichloromethane were mixed by a ball mill. Next, the mixture was heated and refluxed at 50 ° C. for 3 hours, and then heated and stirred at 100 ° C. for 2 hours to distill off dichloromethane. Next, 7 g of the vinyl acetate / vinyl pyrrolidone copolymer and 93 g of ethyl alcohol were placed in a ball mill, heated to 60 ° C., dried and pulverized to 93 g of the obtained powder, and dried and pulverized to obtain the water- and oil-resistant powder of the present invention. I got a body. Test Example 1 Powder obtained according to Examples 1 and 2, untreated sericite (Comparative Example 1), methylhydrogen treated sericite (Comparative Example 2), perfluoroalkyl phosphate ester Dioxyethylamine salt-treated sericite (Comparative Example 3) was mixed with the same amount of purified water, applied to a glass plate with a doctor blade to a thickness of 100 μm, dried at 60 ° C. for 1 hour, and then sampled. I got Each sample was immersed in model sebum (38% by weight of squalane, 38% by weight of olive oil, 24% by weight of oleic acid) at room temperature for 24 hours, and the state of the coating film on the glass plate was visually checked to make a judgment. After each sample was immersed in purified water for 24 hours, the state of the coating film on the glass plate was visually checked to make a judgment. As is clear from Table 1, in Examples 1 and 2,
Both the model sebum and purified water immersion tests showed no peeling and showed water and oil resistance. With respect to Comparative Example 1, no water and oil resistance was shown. Comparative Example 2 had sufficient water resistance but no oil resistance. In Comparative Example 3, although the water resistance was sufficient, it was determined that the oil immersion in the model sebum did not have sufficient oil resistance because some peeling occurred. Test Example 2 Using the water- and oil-resistant powders prepared in Examples 1 and 2, a solid foundation was prepared according to the formulation shown in Table 2. Table 2 also shows comparative examples. Each was manufactured by the following manufacturing method. In addition, Table 3 shows the results of evaluation of the makeup moistness of these solid foundations after 4 hours by 10 expert panelists. (Production method) Components (4) to (14) were mixed in advance with a Henschel mixer. Next, the components (1) to
(3) was heated and dissolved, added with stirring with a Henschel mixer, mixed, and then pulverized by a hammer mill.
The obtained powder was compression-molded in a metal dish to obtain a solid foundation. (Evaluation method) A solid foundation was actually used by 10 specialized panelists, and the following criteria were used for the superiority of makeup after 5 hours of application, spread during use, feeling of adhesion during use, and beauty of finish. Was evaluated. On the makeup base,
An O / W type emulsified cream base was used. A: 7 to 10 persons were good. ：: 4 to 6 persons were good. B: Two or three persons were good. ×: 0 to 1 person is good As is evident from Table 3, Examples 3 and 4 showed very good results over all the items, and were suitable as foundations having good makeup. In Comparative Example 4, there was no particularly good point, and the result was bad for the makeup stickiness. Comparative Example 5 showed good spreadability and finish at the time of use, but did not provide good results in terms of makeup and adhesion. In Comparative Example 6, the cosmetic moistness was improved as compared with Comparative Example 5, but as good as Examples 3 and 4, good results were not obtained. Example 5 (Powder Foundation) A powder foundation having the following composition was produced by the following method. (Production method) Components (1) to (10) were mixed in advance with a Henschel mixer. Next, the components (11) to
(14) was heated and dissolved, added with stirring using a Henschel mixer, mixed, and then pulverized by a hammer mill. The obtained powder was compression-molded in a metal dish to obtain a powder foundation. This powder foundation is
A refreshing feeling was obtained, and even with sweat and sebum, there was no collapse and makeup was good. Example 6 (Powder paste) Powder paste of the following composition was produced by the following method. (Production method) The components (1) to (6) are stirred and mixed with a blender, and the component (7) is sprayed on the components to further uniformly mix. This was pulverized through a hammer mill and then ground through a sieve. This powdery white powder gave a smooth feeling of use, and did not break down even with sweat and sebum, and had a good make-up. Example 7 (Blush) A blusher having the following composition was produced by the following method. (Production method) Components (1) to (5) were mixed and pulverized through a hammer mill. This was transferred to a high-speed blender, and components (6) to (8) were heated and mixed to obtain a uniform mixture, and the mixture was further mixed and made uniform. Thereafter, this was treated with a hammer mill, and the particle size was adjusted through a sieve, and then compression-molded in a metal plate to obtain blush. This blusher gave a smooth feeling of use, and had good makeup with sweat and sebum. Example 8 (Compact Foundation) A blusher having the following composition was produced by the following method. (Production method) Components (8) to (14) are heated and dissolved,
After sequentially mixing (1) to (7), the mixture was treated with a roller mill. The obtained sample was heated and cast into a metal dish to form a compact foundation. This compact foundation gave a moist feeling and had good makeup without sweat or sebum. As apparent from the above description, the present invention has the following features and advantages. (A) Since the water- and oil-resistant powder of the present invention has excellent water resistance and oil resistance, it can prevent makeup loss due to sweat, sebum, and the like when it is incorporated into a cosmetic and applied to the skin. (B) The water-resistant and oil-resistant powder of the present invention retains the transparency, elongation, feel, and good adhesion of the powder of the base material. Does not affect the color tone of the skin, and has good stretch on the skin, good feel,
Improve makeup paste. (C) The water-resistant and oil-resistant powder of the present invention can be produced relatively easily, and a powder or a solid cosmetic having good makeup can be obtained without using expensive oil-resistant raw materials.

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Claims (1)

Claims: 1. A water- and oil-resistant powder obtained by coating the periphery of a target powder with a hydrophobic compound and further coating the surface with a water-soluble film-forming polymer. Characterized powder or solid cosmetics. 2. The target powder is sericite, mica or talc, the hydrophobic compound is silicon oil or a fluorine compound, and the water-soluble film-forming polymer is polyvinylpyrrolidone or vinyl acetate / vinylpyrrolidone copolymer. A powder or solid cosmetic according to claim 1. 3. The water- and oil-resistant powder according to claim 2, wherein
Powder or solid cosmetics characterized by containing 0.0% by weight. [0001]