JP2013129622A - Solid powder cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid powder cosmetic in which in the solid powder cosmetic, drop impact resistance often becomes a problem because being excellent in portability, and that combines excellent drop impact resistance while maintaining excellent usability as a cosmetic to the problem.SOLUTION: The solid powder cosmetic includes 1-20 mass% of an oily component and is characterized by including nano hollow particles comprising silica husk, and the solid powder cosmetic preferably includes 1-20 mass% of the nano hollow particles.

Description

  The present invention relates to a cosmetic, and more particularly, to a cosmetic suitable for a solid powder cosmetic having good usability and having excellent drop impact resistance.

  In recent years, solid powder cosmetics such as powder foundations have become the mainstay of powder cosmetics because of their excellent portability. In such a solid powder cosmetic, since it contains a large amount of powder, improvement in usability such as its extensibility and feeling of coating, and improvement in drop impact resistance are always required. That is, it can be said that in solid powder cosmetics, both good usability and excellent drop impact resistance are both a major issue.

In response to such demands, various powders have been developed and applied to powder cosmetics, and improvements in usability are being studied. For example, surface treatment with a fluorine compound, silicone, or the like imparts water repellency or oil repellency to the powder (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3), or spherical silicone particles (for example, Patent Document 4). , Patent Document 5 and Patent Document 6) have been tried. However, although surface treatment improves the extensibility, the feeling of adhesion to the skin may be impaired or stickiness may occur. Also, when spherical silicone particles are used, the extensibility may be similarly improved, but there may be a sense of incongruity due to its hardness.

On the other hand, spherical powders may be blended to adjust the feel of powder cosmetics, etc., but depending on the size of the particle size, they may become bulky or have good usability and drop impact resistance. There was also a case where the sex was impaired. With regard to the particle size of the spherical powder, for example, Patent Document 7 proposes a cosmetic containing an average particle size of 0.01 to 5 μm and fine particles of hydrophobic silica for the purpose of improving extensibility and rubbing properties. However, there is no indication or suggestion about the improvement of the drop impact resistance. Similarly, Patent Document 8 proposes a powder foundation in which hydrophobic spherical fine particle silica having an average particle size of 150 to 10000 nm is blended. Although mention is made of improvement in usability, it has a drop impact resistance. There is no indication or suggestion for improvement. In addition, fine particle silica that does not have a hollow structure with a primary particle size of nano-level is considered to be effective for drop impact resistance because it is used in powder cosmetics. It also had an adverse effect on the feel.

Further, in silica nanoparticles that do not have a hollow structure like the porous silica described in Patent Document 9, “If the average particle diameter is less than 0.5 μm, in the touch when the particle powder is touched, the spherical powder As a result, the feeling of rolling is not felt, and the feeling of spreading and spreading is felt. "

Furthermore, the application of hollow silica particles to makeup cosmetics is exemplified as described in Patent Document 10, but it is said that “a squeaky sensation may occur when cosmetics are used if it is less than 0.5 μm”. The particle diameter has been proposed to be in the micron order, and further, the improvement of the drop impact resistance due to the hollow structure is not clearly shown or suggested.

Regarding drop impact resistance, especially in cosmetics such as foundations containing extender pigments, it is well known that drop impact resistance is deteriorated due to the powder properties of extender pigments. Various attempts have been made. For example, there is a method for manufacturing a solid powder cosmetic (see, for example, Patent Document 11) in which a slurry containing powder and a non-volatile fluoro oil agent is filled in a molding container and then molded. However, this technique has a problem that the feeling of use becomes heavy and the dispersibility of the powder is greatly affected.

On the other hand, nano hollow particles made of silica shell are components that are widely used as heat insulating materials for coating agents and heat insulating glass. However, it is not known at all to contain such components in solid powder cosmetics. Further, it is not known at all that the solid powder cosmetic containing nano hollow particles composed of such silica shells has excellent properties that achieve both good usability and excellent drop impact resistance.

JP-A-6-79163 JP-A-5-112430 JP-A-5-339125 JP 2008-137953 A Japanese Patent Laid-Open No. 2004-359592 JP-A-5-43420 JP 2000-264815 A JP 2011-88832 A JP 2009-137806 A JP 2009-280507 A JP 2001-322912 A

  This invention is made | formed in view of the subject of the said prior art, The objective makes it a subject to provide the solid powder cosmetics which have favorable usability and the outstanding drop impact resistance.

In view of such a situation, as a result of intensive investigations aimed at solving the problems, the present inventors have obtained excellent usability and superiority by blending nano hollow particles made of silica shell in a solid powder cosmetic. The inventors have found that the drop impact resistance is compatible, and have completed the present invention. That is, the present invention is as follows.
(1) A solid powder cosmetic comprising 1 to 20% by mass of an oil component and nano hollow particles made of silica shell.
(2) The solid powder cosmetic according to (1), comprising 1 to 20% by mass of nano hollow particles made of the silica shell.
(3) The solid powder cosmetic according to either (1) or (2), comprising 3 to 89% by mass of extender pigment.
(4) It is obtained by adding a solvent to a cosmetic base containing a powder component and an oily component to form a slurry, filling the slurry in a container, and then removing the solvent (1). )-(3) The solid powder cosmetics in any one of.

  ADVANTAGE OF THE INVENTION According to this invention, the solid powder cosmetics which have favorable usability and the outstanding drop impact resistance can be provided by mix | blending the nano hollow particle which consists of a silica shell in solid powder cosmetics.

(1) Nano hollow particles made of silica shells related to the solid powder cosmetic of the present invention The solid powder cosmetics of the present invention contain nano hollow particles made of silica shells. It is preferable that the average particle diameter of the nano hollow particle which consists of a silica shell used by this invention exists in the range of 30-300 nm by the measurement by a microscope. The term “microscopic method” as used herein refers to a method of observing particles using a scanning electron microscope or a transmission electron microscope and determining the size of the particles. The nano hollow particles made of the silica shell are, for example, low density silica like the nano hollow particles made of the silica shell described in JP 2005-263550 A, JP 2007-70458 A, or JP 2010-215490 A. Nano hollow particles made of a shell and nano hollow particles made of a high-density silica shell can be mentioned, but the invention is not limited thereto. Examples of the silica shell include those having a plurality of micropores and those having no micropores, but are not limited thereto. Among these, nano hollow particles composed of low-density silica shells having micropores are particularly preferable from the viewpoint of dispersion.
It is preferable that 1-20 mass% of nano hollow particles which consist of the said silica shell are contained in cosmetics. In particular, it is more preferably 3 to 15% by mass from the viewpoint that an effect for obtaining high fluidity and high filling property is easily exhibited. If it is less than 1% by mass, the effects of the present invention may not be sufficiently exhibited, and if it exceeds 20% by mass, the feeling of use may be remarkably deteriorated.

(2) Oil component relating to the solid powder cosmetic of the present invention The content of the oil component used in the present invention is 1 to 20% by mass relative to the entire cosmetic. Preferably it is 3-20 mass%, More preferably, it is 5-18 mass%, Most preferably, it is 10-16 mass%. If it exceeds 20% by mass, the elongation may be poor or the attachment may be poor, and if it is less than 1% by mass, the drop impact resistance may be deteriorated.

A method for producing a solid powder cosmetic to be molded after filling 0507 (for example, the oily component used in the present invention is not particularly limited as long as it can be generally used in cosmetics. These oily ingredients include, for example, avocado oil, linseed oil, eno oil, olive oil, kaya oil, wheat germ oil, rice bran oil, sesame oil, sasanqua oil, safflower oil, Liquid oils such as cinnagari oil, soybean oil, tea seed oil, camellia oil, corn oil, triglycerin, rapeseed oil, Japanese kiri oil, macadamia nut oil, cottonseed oil, germ oil, persic oil, castor oil, peanut oil, cocoa butter, Hardened castor oil, hardened oil, hardened coconut oil, palm oil, palm kernel oil, mole oil, solid oil such as coconut oil, isostearic acid, undecylenic acid, eicosa Higher fatty acids such as ntaenoic acid, oleic acid, stearic acid, docosahexaenoic acid, toluic acid, palmitic acid, behenic acid, myristic acid, lauric acid, linoleic acid, hydrocarbon oils such as squalane, polyisobutene, liquid paraffin, petrolatum, perfluoro Fluorine oil such as alkane, perfluorodecalin, perfluorobutyltetrahydrofuran, perfluoropolyether, fluorine-modified silicone, paraaminobenzoic acid UV absorber, anthranilic acid UV absorber, salicylic acid UV absorber, cinnamic acid UV absorber, benzophenone UV absorber, sugar UV absorber, octyl methoxycinnamate, silylisopentyl, 2,4-bis-[{4- (2-ethylhexoroxy) -2-hydroxy} -phenyl ] -6- (4-Methoxy Nyl) -1,3,5-triazine, octyltriazone, octocrylene, 2-ethylhexyl 2-cyano-3,3-diphenylacrylate, etc., an oil-soluble or oleophilic liquid organic ultraviolet absorber, linear alcohol ( For example, oleyl alcohol, stearyl alcohol, cetyl alcohol, cetostearyl alcohol, behenyl alcohol, myristyl alcohol, lauryl alcohol, etc .; branched chain alcohols (eg, isostearyl alcohol, octyldodecanol, cholesterol, 2-decyltetradecinol, Higher alcohols such as batyl alcohol, phytosterol, hexyl decanol, and lanolin alcohol), diisobutyl adipate, di-2-heptylundecyl adipate, 2-hexyldecyl adipate Acetoglyceride, isocetyl isostearate, 2-ethylhexyl palmitate, ethyl laurate, cetyl octanoate, oleyl oleate, decyl oleate, triethyl citrate, 2-ethylhexyl succinate, ethylene glycol di-2-ethylhexanoate, Neopentyl glycol dicaprate, glycerin di-2-heptylundecanoate, dipentaerythritol fatty acid ester, hexyldecyl dimethyloctanoate, isocetyl stearate, butyl stearate, cetyl 2-ethylhexanoate, diisopropyl sebacate, dibasic sebacate 2-ethylhexyl, tetra-2-ethylhexanoic acid pentaerythritol, triisostearic acid trimethylolpropane, triisopalmitic acid glycerin, tri-2 Glycerol ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, glyceryl trioctanoate, glyceride tri-2-heptylundecanoate, glyceryl trimyristate, cetyl lactate, myristyl lactate, isopropyl palmitate, 2-hexyldecyl palmitate , 2-heptylundecyl palmitate, cholesteryl 12-hydroxystearate, castor oil fatty acid methyl ester, isopropyl myristate, octyldodecyl myristate, 2-hexyldecyl myristate, myristyl myristate, N-alkylglycol monoisostearate, Synthetic ester oil such as hexyl laurate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, lanolin acetate, diisostearyl malate, chain -Like polysiloxane (eg, dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, etc.); cyclic polysiloxane (eg, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, etc.), three-dimensional network Silicone oil such as silicone resin, silicone rubber, various modified polysiloxanes (amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, pyrrolidone carboxylic acid-modified polysiloxane, fluorine-modified polysiloxane, etc.) forming the structure Etc. can be preferably exemplified.

(3) Body Pigment Related to the Solid Powder Cosmetic of the Present Invention The solid powder cosmetic of the present invention can be blended with one or more body pigments in order to maintain the usability and product dosage form. . The extender pigment is not particularly limited as long as it is usually used in cosmetics. An extender is an inorganic pigment that is generally used to maintain the dosage form of a product. By adding an extender, the product's usability (extensibility, adhesion), gloss, color tone, etc. Can be adjusted.

Conventionally, in a solid powder cosmetic containing an extender, deterioration of the drop impact resistance due to the powder characteristics of the extender has been a problem. One of the features of the present invention is that excellent drop impact resistance can be obtained even when an extender pigment is blended. The effect is that the amount of the extender pigment is 3 to 89% by mass, preferably 10 to 70% by mass, particularly preferably 20 to 60% by mass, based on the entire cosmetic.
Prominently exhibited when blended.

Examples of extender pigments that can be blended in the present invention include mica titanium, talc, kaolin, mica, synthetic mica, sericite, magnesium carbonate, calcium carbonate, and talc / silica / titanium oxide composite. The extender pigment may have an untreated surface, or may be treated with silicone, a fluorine compound, a silane coupling agent, a fluororesin [eg, Teflon (registered trademark)], a fatty acid, a fatty acid soap, lauroyl lysine, or the like. You may use what gave the process.

(4) Fibrous powder related to the solid powder cosmetic of the present invention In the solid powder cosmetic of the present invention, one or more fibrous powders are used in order to further improve the drop impact resistance. Can be blended. The fibrous powder as used herein refers to a powder having a rod-like shape and a length of 1.5 times or more of the diameter when the cross section is regarded as a circle. The cross-sectional shape of the fibrous powder may be circular, or the fibrous powder described in JP-A-2005-132723, JP-A-2008-105990, or JP-A-2005-314389. As described above, the cross section may be irregular, or the surface may be treated. The fibrous powder that can be blended in the solid powder cosmetic of the present invention is not particularly limited in diameter and length when the cross-section is regarded as a circle, but the cross-sectional diameter is 1 to 30 μm. It is preferable that it is 5-25 micrometers. Even if the diameter of the cross section is too small or too large, the feeling of use when the solid powder cosmetic of the present invention is applied may be unfavorable. The length of the fibrous powder is preferably 50 to 600 μm, and more preferably 100 to 500 μm. If the length of the fibrous powder is too long, the fibrous powder tends to be entangled, and the fibrous powder may not be uniformly dispersed in the solid powder cosmetic, which is not preferable. On the other hand, if it is too short, it may be difficult to improve the drop strength due to the fibrous powder.

The blending amount of the fibrous powder is 0.1 to 30% by mass, preferably 0.5 to 25% by mass, and more preferably 1 to 20% by mass with respect to the entire solid powder cosmetic. preferable. If the blended amount of the fibrous powder is too small, it may be difficult to improve the drop strength by the fibrous powder. Moreover, when there are too many compounding quantities, uniform dispersion | distribution of the fibrous powder in solid powder cosmetics will become difficult, and usability may fall, and it is unpreferable.

Examples of the material constituting the fibrous powder include inorganic substances such as silica, alumina, magnesium silicate, calcium silicate, polyamide such as nylon, acrylic resin, polyethylene, polyester, polymethylsilsesquioxane, and cross-linked poly Examples thereof include organic substances such as dimethylsiloxane. Moreover, the mixture of these substances can be illustrated. The fibrous powder that may be blended in the solid powder cosmetic of the present invention can be obtained, for example, by cutting a fiber spun to a predetermined thickness by a conventional method into a predetermined length. The fibrous powder may be colored with organic dyes such as Red No. 3, Red No. 201, Red No. 226, Yellow No. 4 and Blue No. 1 and inorganic dyes such as iron oxide and chromium oxide. .

(5) Solid and / or semi-solid oil content related to the solid powder cosmetic of the present invention In the solid powder cosmetic of the present invention, in order to further improve the drop impact resistance, the solid and / or semi-solid oil content of wax etc. You may mix | blend 1 type (s) or 2 or more types. The blending amount of solid and / or semi-solid oil such as wax is 0.5 to 10% by mass, preferably 0, based on the whole solid powder cosmetic.
. 5-5 mass%, More preferably, it is 1-3 mass%. The addition effect of the wax is exhibited from about 0.5% by mass as a blending amount, but when it exceeds 5% by mass, there may be a case where the feeling of use becomes heavy, so long as the drop impact resistance is sufficiently maintained, A smaller amount of solid and / or semi-solid oil such as wax is preferred. As a blending method of solid and / or semi-solid oil such as wax to the solid powder cosmetic of the present invention, a method of blending by heating and dissolving solid and / or semi-solid oil such as wax together with other oil components, The method of mix | blending the fine dispersion of solid and / or semi-solid oils, such as wax, with a powder component is mentioned. The former method is more preferable for uniformly blending in the cosmetic.

Examples of the solid and / or semi-solid oil such as wax include waxes mainly composed of hydrocarbons such as ceresin wax, paraffin wax, Fischer-Tropsch wax, polyethylene wax, polyethylene / polypropylene wax, and microcristan wax, ibota wax, and carnauba wax. , Natural waxes such as candelilla wax, rice bran wax, beeswax, and owl, and purified products thereof, silicone wax, long-chain fatty alcohol, and the like, but are not limited thereto. Among these, it is particularly preferable to add a wax mainly composed of hydrocarbon from the viewpoint of drop impact resistance, moldability and the like.

(6) Solid powder cosmetic of the present invention The cosmetic of the present invention is a solid powder cosmetic and can be applied to base makeup materials such as powder foundation and pressed powder, and point makeup materials such as powder eye color and cheek color. Although possible, it is preferable to use it as a base make-up material with a large use area from the standpoint of prominent use. In applying to such various solid powder cosmetics, in the solid powder cosmetic of the present invention, suitable solid ingredients are selected from the optional ingredients normally used in cosmetics and should be applied. Can be processed into a preferable property.
Examples of such optional components include fatty acid soap (sodium laurate, sodium palmitate, etc.), anionic surfactants such as potassium lauryl sulfate, triethanolamine ether sulfate, stearyltrimethylammonium chloride, benzalkonium chloride, lauryl. Cationic surfactants such as amine oxides, imidazoline-based amphoteric surfactants (such as 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt), betaine surfactants (alkylbetaines, amides) Amphoteric surfactants such as acylmethyltaurine, sorbitan fatty acid esters (such as sorbitan monostearate, sorbitan sesquioleate), glycerin fatty acids (glyceryl monostearate) Phosphorus, etc.), propylene glycol fatty acid esters (such as propylene glycol monostearate), glycerin alkyl ether, POE sorbitan fatty acid esters (such as POE sorbitan monooleate, polyoxyethylene sorbitan monostearate), POE sorbite fatty acid esters ( POE-sorbitol monolaurate, etc.), POE glycerin fatty acid esters (POE-glycerin monoisostearate, etc.), POE fatty acid esters (polyethylene glycol monooleate, POE distearate, etc.), POE alkyl ethers (POE2-octyldodecyl ether) Etc.), POE alkyl phenyl ethers (POE nonyl phenyl ether, etc.), Pluronic types, POE / POP alkyl ethers (POE / P) P2-decyltetradecyl ether, etc.), Tetronics, POE castor oil / hardened castor oil derivatives (POE castor oil, POE hardened castor oil, etc.), nonionic surfactants such as sucrose fatty acid esters, alkyl glucosides, polyethylene Glycol, glycerin, 1,3-butylene glycol, erythritol, sorbitol, xylitol, maltitol, propylene glycol, dipropylene glycol, diglycerin, isoprene glycol, 1,2-pentanediol, 2,4-hexylene glycol, 1, Polyhydric alcohols such as 2-hexanediol and 1,2-octanediol, moisturizing ingredients such as sodium pyrrolidonecarboxylate, lactic acid, sodium lactate, guar gum, quince seed, carrageenan, galactan, gum arabic, pectin Chin, mannan, starch, xanthan gum, curdlan, methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, methylhydroxypropylcellulose, chondroitin sulfate, dermatan sulfate, glycogen, heparan sulfate, hyaluronic acid, sodium hyaluronate, tragacanth gum, keratan sulfate, chondroitin, mucoitin Sulfuric acid, hydroxyethyl guar gum, carboxymethyl guar gum, dextran, keratosulfuric acid, locust bean gum, succinoglucan, caronic acid, chitin, chitosan, carboxymethylchitin, agar, polyvinyl alcohol, polyvinylpyrrolidone, carboxyvinyl polymer, sodium polyacrylate Thickeners such as polyethylene glycol, bentonite, surface treated , Powders such as silicic anhydride (silica), aluminum oxide, barium sulfate, etc., surface may be treated, bengara, yellow iron oxide, black iron oxide, cobalt oxide, ultramarine, bitumen, titanium oxide , Inorganic pigments such as zinc oxide, the surface may be treated, normal fish phosphorus foil, pearl agents such as bismuth oxychloride, may be raked, red 202, red 228, red No. 226, Yellow No. 4, Blue No. 404, Yellow No. 5, Red No. 505, Red No. 230, Red No. 223, Orange No. 201, Red No. 213, Yellow No. 204, Yellow No. 203, Blue No. 1, Green No. 201 Organic dyes such as purple 201 and red 204, polyethylene powder, polymethyl methacrylate, nylon powder, organopolysiloxane elastomer and other organic powders, Powder coated with biological components similar polymers such as a copolymer oxyalkyl phosphorylcholine and alkyl methacrylates, ethanol, lower alcohols such as isopropanol, vitamin A or its derivatives, vitamin B ₆ hydrochloride, vitamin B ₆ Vitamins such as tripalmitate, vitamin B ₆ dioctanoate, vitamin B ₂ or derivatives thereof, vitamin B ₁₂ such as vitamin B ₁₂ , vitamin B ₁₅ or derivatives thereof, α-tocopherol, β-tocopherol, γ-tocopherol, vitamin E acetate, etc. E, Vitamin D, Vitamin H, Pantothenic acid, Pantethine, Pyrrokyrinquinone and other vitamins, moisturizer, water-soluble polymer, film agent, sequestering agent, amino acid, organic amine, polymer emulsion, pH adjustment Agent, skin nutrient, antioxidant , Antioxidation assistants, preservatives, perfumes, water and the like are preferably exemplified, but not limited to these examples.

The solid powder cosmetic of the present invention is manufactured by a method for manufacturing a normal cosmetic, and the manufacturing method is not limited, but examples thereof include the following manufacturing methods.

<Method for producing solid powder cosmetic>
First, after mixing the powder component containing the nano hollow particle which consists of a silica shell with a Henschel mixer etc., an oil-based component is added and mixed uniformly and a cosmetic base is prepared. Next, the cosmetic base is mixed and kneaded with a solvent, filled in an inner dish, and then the solvent as a kneading medium is volatilized and molded. The removal of the solvent can be performed by a conventional method such as natural drying, warm drying, warm air drying, vacuum suction, or the like. Examples of the solvent that can be used in the present invention include water, alcohols such as methanol, ethanol, and isopropyl alcohol, benzene, toluene, THF, paraffin, silicone, and the like. Depending on the characteristics of the powder component and the oil component used, 1 A seed or a mixture of two or more can be used. Among these, a volatile oil agent is particularly preferable, and examples thereof include light isoparaffin, dimethicone, and cyclomethicone having a boiling point of 150 to 250 ° C. In the case of dimethicone, the viscosity is 1 mPa · s or less in terms of viscosity. Some of these volatile oils are already commercially available as cosmetic raw materials, and such cosmetic raw materials can be purchased and used. Among such commercially available products, preferable examples include “IP Solvent 1620MU” manufactured by Idemitsu Kosan Co., Ltd. and “Silicone KF96-1” manufactured by Shin-Etsu Silicone. The amount of the solvent is preferably 0.25 to 1.00 times that of a cosmetic base composed of a powder component and an oil component in terms of weight. In the kneading, kneading that can break the secondary agglomeration of the powder as much as possible is preferable. Specifically, it is preferable to mix and knead using a kneader, a double planetary mixer, or the like. After kneading to prepare a slurry and filling it, the solvent is volatilized and molded, and the volatilization condition of the solvent is preferably exemplified by a blowing condition at 50 to 100 ° C. for 6 to 48 hours.

  Hereinafter, the present invention will be described in more detail with reference to examples, but it goes without saying that the present invention is not limited to such examples. Unless otherwise specified, the blending amount indicates mass%.

First, evaluation criteria in Test Example 1 and Test Example 2 using Examples and Comparative Examples shown below will be described.
[Drop impact resistance]
Set each cosmetic product in a compact container, and repeatedly drop it on the concrete so that the compact faces downward from a height of 75 cm until it becomes abnormal, such as chipping, cracking, cracking, etc. It was evaluated by the number of times. The evaluation criteria are as follows.
(Evaluation criteria)
◎: 10th or more ○: 6th to 9th △: 3rd to 5th ×: Less than 3rd

[Usability (free and soft)]
Twenty female panelists applied the test product to the skin and evaluated the usability (spreading and softness). The evaluation criteria are as follows.
(Evaluation criteria)
◎: The number of people who answered good is 18 or more ○: The number of people who answered good is 14-17 people △: The number of people who answered good is 10-13 people ×: The number of people who answered good is less than 10 people

[Warm feeling (warmth after application)]
Twenty female panelists applied test products to their skin and evaluated the warmth after use. The evaluation criteria are as follows.
(Evaluation criteria)
◎: After application, the number of people who answered that it was warm was 18 or more ○: After application, the number of people who answered that it was warm was 14-17 people △: The number of people who answered that it was warm after application: 10-13 people ×: warm after application Less than 10

[Continuous use test (puff removal in continuous use)]
Each cosmetic was continuously rubbed with a cosmetic puff many times, and the ability of the foundation to puff during continuous use was evaluated. The evaluation criteria are as follows.
(Evaluation criteria)
◎: Can be used without problems until the bottom is visible ○: Aggregate (so-called “tekari”) is formed on the cosmetic surface, but can be used until the end Δ: Aggregate (so-called “tekari”) is formed on the cosmetic surface, and the remaining amount is The yield is significantly reduced when the amount is less than half. X: Agglomerates (so-called “tekari”) are formed on the cosmetic surface, and the yield is significantly decreased when the remaining amount is more than half.

<Production Example 1>
A powder foundation, which is a solid powder cosmetic, was prepared according to the following steps. That is, the powder component was mixed with a Henschel mixer and then pulverized with a pulverizer. Thereafter, the oil component was added while stirring the mixture again with a Henschel mixer, and the mixing was continued to obtain a cosmetic base. The obtained cosmetic base was taken out from the Henschel mixer, then pulverized again with a pulverizer, and kneaded in a double planet mixer at a ratio of 0.5 light isoparaffin to the cosmetic base 1 in terms of mass. Created. This slurry was filled in an aluminum dish, and light isoparaffin was removed under vacuum conditions to obtain a solid powder cosmetic. The solid powder cosmetics of Examples 1 to 8 and Comparative Examples 1 to 5 were adjusted at component ratios as shown in Tables 1 and 2.

<Test Example 1>
Based on the formulation shown in Table 1 below, a solid powder cosmetic was prepared as shown in Production Example 1, and the evaluation was performed. The evaluation results are shown in Table 1.

As shown in Table 1, even in a solid powder cosmetic with a relatively small amount of oil component, when nano hollow particles made of silica shell are blended, it has good usability and has a drop impact resistance. It was confirmed that an excellent solid powder cosmetic was obtained (Examples 1 to 3).
On the other hand, when nano hollow particles made of silica shell are not blended with petrolatum, silicone oil, ester oil alone, when the amount of oil component is small, the usability tends to deteriorate and the drop impact resistance is low. The result was worse (Comparative Examples 1 to 3).
As can be seen from the comparison between Example 1 and Example 2, the drop impact resistance is further improved by blending petrolatum, and the excellent drop impact resistance is maintained while maintaining good usability by blending nylon fiber. It turned out that the cosmetics which have property are obtained (Example 2 and Example 3).
From the above, it was found that, when nano hollow particles made of silica shells were used, a unique solid powder cosmetic having both good usability and excellent drop impact resistance was obtained.
Furthermore, solid powder cosmetics containing nano-hollow particles made of silica shells showed good results even in continuous use tests, and it was revealed that the cosmetics felt warm after application.

<Test Example 2>
Based on the formulation shown in Table 2 below, a solid powder cosmetic is prepared as shown in Production Example 1, the evaluation is performed, and the nano hollow particles composed of silica shells in the solid powder cosmetic of the present invention are suitable. The amount was examined. The evaluation results are shown in Table 2.

From the results of Examples 4 to 8 in Table 2, it is clear that the nano hollow particles composed of silica shells have good usability and excellent drop impact resistance when contained in cosmetics in an amount of 1 to 20% by mass. It was confirmed that 3 to 10% by mass is particularly preferable. From the result of Comparative Example 4, when the amount of the nano hollow particles made of silica shell is larger than the range of the present invention, good usability cannot be maintained and the result of continuous use test tends to deteriorate. there were.
Furthermore, it has been found that the warm feeling can be felt by many panelists when nano hollow particles made of silica shells are contained in an amount of 3% by mass or more, and in the case of containing 6% by mass or more, it is felt by most panelists. .

It can be effectively used for cosmetics, especially makeup cosmetics.

Claims (4)

  A solid powder cosmetic comprising 1 to 20% by mass of an oily component and nano hollow particles made of silica shells. The solid powder cosmetic according to claim 1, comprising 1 to 20% by mass of nano hollow particles made of the silica shell.   The solid powder cosmetic according to claim 1, comprising 3 to 89% by mass of extender pigment. A cosmetic base containing a powder component and an oil component is obtained by adding a solvent to form a slurry, filling the container with the slurry, and then removing the solvent. The solid powder cosmetic according to any one of the above.