JP2009292791A - Skin care preparation having excellent natural finish and spreadability - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cosmetic having a natural finish, and excellent maintainability of cosmetic effects and uniform coatability. property. <P>SOLUTION: (1) Coated platy powder having a coating layer containing translucent powder, and (2) spherical silicone powder insoluble in an oil are included in a skin care preparation. The translucent powder is preferably silicic acid anhydride, and the coating layer in the coated platy powder preferably contains iron oxide. The spherical silicone powder insoluble in the oil is preferably powder comprising a silicone rubber and a silicone resin, and preferably one or two or more selected from the group consisting of vinyl dimethicone/methicone/silsesquioxane crosspolymer, diphenyl dimethicone/vinyl diphenyl dimethicone/silsesquioxane crosspolymer, and polymethylsilsesquioxane. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an external preparation for skin, and more particularly to an external preparation for skin suitable for makeup cosmetics.

  In skin external preparations such as cosmetics, powder has various functions, and these functions are incorporated into the skin external preparation. As the function, for example, it is possible to conceal a stain or the like by an optical effect, or to make the facial color brighter and to suitably change the impression formation. In particular, makeup cosmetics are cosmetics with the optical effect of such powders at the center. In other words, makeup cosmetics have the effect of improving problems such as skin spots and dullness with base makeup represented by foundations, as well as effects such as emphasis around the eyes and moisturizing lips with point makeup. . In such an optical effect, the place which depends on concealment is large in the past, for example, a method of improving skin trouble with a foundation containing powder with high concealment such as titanium oxide has been taken in recent years. Relying on such concealment tends to result in an unnatural finish, and a natural finish effect has been added to the required quality.

  Therefore, a base makeup cosmetic with a bright green color tone has been studied as a foundation having a natural finish while sufficiently covering skin troubles (see, for example, Patent Document 1). In addition, as a method of giving a natural finish effect with transparency, the effect of a cosmetic compounded with a specific rutile type titanium oxide has been reported. It has also been reported that it has a natural finish, has a shielding effect against ultraviolet rays in the wavelength range of 280 nm to 400 nm, has a good usability, and takes a longer time to break up the makeup. (For example, refer to Patent Document 2). Furthermore, a composite pigment of iron oxide and a bismuth compound, specifically, a pigment capable of giving a natural finish with a feeling of skin and transparency by a cosmetic containing a powder in which iron oxide is coated on the surface of a bismuth compound, and It has also been reported that cosmetics can be provided (see, for example, Patent Document 3). In particular, the natural finish makeup cosmetics that have been attracting attention in recent years can be exemplified by those having a translucent layer provided on a concealable powder or plate-like powder (see, for example, Patent Document 4 and Patent Document 5). . Problems remaining in such a technique include improvement in the maintenance of the makeup effect and uniform applicability of the cosmetic. In particular, it can be said that the uniform application property is an important issue related to the expression of the cosmetic effect itself with good reproducibility.

  On the other hand, in the base makeup cosmetics with high hiding power, there is a problem that in addition to a natural finish, the spreadability is poor, and thus the feeling of stimulation and the feeling of use are poor. Therefore, as a method for improving the spreadability, a high amount of diisostearyl malate, dipentaerythritol monostearate, sucrose tetraisostearate, heavy liquid isoparaffin, high viscosity silicone and polyglycerin isostearate, etc. Cosmetics containing a viscosity oil and (C10-20) acyl sarcosine (C1-4) alkyl such as lauroyl sarcosine isopropyl have been reported, and it has been reported that the present invention has excellent adhesion in addition to extensibility. There is also a report that the spreadability of cosmetics, which is a spherical silicone powder insoluble in an oil agent, is improved by adding a silicone elastomer (for example, see Patent Document 7). )

However, there is no known skin external preparation containing 1) a coated plate-like powder having a coating layer containing a translucent powder, and 2) a spherical silicone powder that is insoluble in oil. Furthermore, it has not been known at all that the use of such a configuration makes it possible to obtain a cosmetic that has a natural finish and maintains a cosmetic effect and is excellent in uniform application.

JP-A-11-228347 Japanese Patent Laid-Open No. 08-143438 Japanese Patent Laid-Open No. 2001-279126 Japanese Patent Laid-Open No. 10-62338 JP 2006-241012 A JP 2004-075639 A JP 2005-23079 A

  The present invention has been made under such circumstances, and an object of the present invention is to provide a cosmetic that has a natural finish and is excellent in the maintenance of the makeup effect and the uniform coating property.

In view of such a situation, the present inventors have intensively researched and sought for cosmetics that have a natural finish and maintain makeup effect and are excellent in uniform application. It has been found that a coated plate-like powder having a coating layer containing a transparent powder, and 2) a skin external preparation containing a spherical silicone powder insoluble in an oil agent has the above-mentioned characteristics. To complete. That is, the present invention is as follows.
(1) 1) A coated plate-like powder having a coating layer containing a semi-transparent powder, and 2) a spherical silicone powder that is insoluble in an oil agent. Agent.
(2) The external preparation for skin according to (1), wherein the translucent powder is silicic anhydride.
(3) The skin external preparation according to (1) or (2), wherein the coating layer in the coated plate-like powder contains iron oxide.
(4) The external preparation for skin according to any one of (1) to (3), wherein the spherical silicone powder insoluble in the oil is a powder comprising silicone rubber and silicone resin.
(5) A spherical silicone powder insoluble in the oil agent is composed of vinyl dimethicone / methicone / silsesquioxane crosspolymer, diphenyldimethicone / vinyldiphenyldimethicone / silsesquioxane crosspolymer, and polymethylsilsesquioxane. The external preparation for skin according to any one of (1) to (4), wherein the external preparation is one or more selected from the group.
(6) The topical skin preparation according to any one of (1) to (5), wherein the content of Bengala or hydroxymethylpolysiloxane-coated Bengala is 1% by mass or less.
(7) The external preparation for skin according to any one of (1) to (6), which is a makeup cosmetic.

ADVANTAGE OF THE INVENTION According to this invention, it is a natural finish and can provide the cosmetics which are excellent in the maintenance of a makeup effect and uniform applicability | paintability.

<1> Coated plate-like powder having a coating layer containing a translucent powder which is an essential component of the external preparation for skin of the present invention Coating having a coating layer containing a translucent powder which is an essential component of the present invention The plate-like powder is characterized by having a coating layer having a semi-transparent property due to the semi-transparent powder coated on the upper layer of the plate-like powder. As the translucent powder contained in the coating layer, a powder having a refractive index of 1.4 to 1.8 can be suitably exemplified. Specifically, silica (anhydrous silicic acid), alumina, zirconia, calcium carbonate, Preferred examples include those selected from magnesium carbonate, calcium silicate, magnesium silicate, methyl methacrylate polymer, methylsiloxane network polymer, nylon powder and the like. The average particle size of such a translucent powder is preferably 2 to 30 μm. This is because an optical effect that looks natural in this range is suitably expressed. Such a coating layer can contain a powder that is not classified as a semi-transparent powder as long as the translucency is not impaired. Such powders include, for example, yellow iron oxide, bengara, bitumen, ultramarine blue, organic pigments that may be raked, and examples of the organic pigments include red 201, red 202, red 204, and red 205. No., Red 220, Red 226, Red 228, Red 405, Orange 203, Orange 204, Yellow 205, Yellow 401, Blue 404, Red 3, Red 104, Red 106, Examples include Red No. 227, Red No. 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3, Blue No. 1, and the like. A particularly preferred form is a form containing a red colored powder and a yellow colored powder in addition to the translucent powder, and the ratio of the red colored powder to the yellow colored powder is 1: 3 to 3. It is preferably 1:10. The colored powder and the translucent powder can be the same layer and can be a single layer, or the translucent powder layer and the layer containing the colored pigment can be different layers, or the translucent powder layer. A laminated type of a composite layer of a semitransparent powder and a colored powder may be used. Particularly preferable is that the intermediate layer has a coating layer composed of a complex of a colored pigment and a translucent powder, and the outermost layer is a coating layer composed of a translucent powder and does not contain a pigment. It is a multi-layer structured powder. The plate-like powder can be used as long as the aspect ratio is 10 to 90. For example, one or more kinds selected from mica, sericite, titanium mica and titanium sericite are preferable. it can. In particular, titanium sericite is preferable as a powder for the substrate because it embodies a natural luster and excellent covering power. The surface of the outermost layer may be treated and modified with silicones, a coupling agent having a perfluoro group, a metal soap, or an amino acid derivative. The coating of the coated plate powder of the present invention may be mechanochemical or by partial sintering. As sintering conditions, it is preferable to calcinate at 100 to 1000 ° C. under aerobic conditions or in a nitrogen stream, and as a mechanochemical method, a coating method using a planetary ball mill can be exemplified. As such a coated plate-like powder having a coating layer containing such a translucent powder, there is a commercially available one, and it can also be used. Preferred examples of commercially available products include “Derma Real Leaf N” manufactured by Catalyst Kasei Co., Ltd. The coated plate-like powder is preferably contained in the total amount of the external preparation for skin of the present invention in an amount of 0.001 to 40% by mass, more preferably 0.1 to 20% by mass. When the content is less than the lower limit, there are cases where it is difficult to sufficiently exhibit a natural finish effect, and when the content exceeds the upper limit, the degree of freedom of the dosage form as a cosmetic product may be limited.
<2> Spherical Silicone Powder Insoluble in Oil The spherical silicone powder insoluble in the oil that is an essential component of the present invention is a powder composed of silicone rubber and silicone resin. The spherical silicone powder insoluble in the oil of the present invention comprises vinyl dimethicone / methicone / silsesquioxane crosspolymer, diphenyldimethicone / vinyldiphenyldimethicone / silsesquioxane crosspolymer, and polymethylsilsesquioxane. Spherical silicone powders that are one or more selected from the group and insoluble in such oils are (poly) methyl (polymethoxy) siloxane, (poly) vinyl (poly) methyl (poly) methoxysiloxane, methyl It can be produced by dealcoholizing phenyl (di) methoxysiloxane and then polymerizing a vinyl group to form a crosslink, but it is also possible to use a commercially available one, which is a preferred commercially available product. Tospearl series (made by Toshiba Silicone), KSP-3 0 (manufactured by Shin-Etsu Chemical), it is preferable to use KSP-100, 101, 102, 103 (manufactured by Shin-Etsu Chemical). It is preferable that 0.01-20 mass% of spherical silicone powder insoluble in the oil agent is contained in the total amount of the external preparation for skin of the present invention, more preferably 0.1-10 mass%. When the blending amount is less than the lower limit, there are cases where it is difficult to sufficiently exhibit the effect of improving the spreadability, and when the blending amount exceeds the upper limit, the degree of freedom of the dosage form as a cosmetic product may be limited.

Moreover, the skin external preparation of this invention can contain the arbitrary components normally used by cosmetics other than these said components. Optional ingredients include, for example, macadamia nut oil, avocado oil, corn oil, olive oil, rapeseed oil, sesame oil, castor oil, safflower oil, cottonseed oil, jojoba oil, palm oil, palm oil, liquid lanolin, hydrogenated coconut oil, hydrogenated oil Oil, wax, liquid paraffin, squalane, pristane, ozokerite, paraffin, ceresin, petrolatum, microcrystallin, oil, wax, liquid oil, waxy wax, liquid paraffin, squalane, pristine Hydrocarbons such as wax, higher fatty acids such as oleic acid, isostearic acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, undecylenic acid, cetyl alcohol, stearyl alcohol, isostearyl alcohol , Behenyl alcohol, octyldodecanol, higher alcohols such as myristyl alcohol, cetostearyl alcohol, cetyl isooctanoate, isopropyl myristate, hexyldecyl isostearate, diisopropyl adipate, di-2-ethylhexyl sebacate, cetyl lactate, malic acid Diisostearyl, di-2-ethylhexanoic acid ethylene glycol, dicaprate neopentyl glycol, di-2-heptylundecanoic acid glycerin, tri-2-ethylhexanoic acid glycerin, tri-2-ethylhexanoic acid trimethylolpropane, tri Synthetic ester oils such as trimethylolpropane isostearate and pentane erythritol tetra-2-ethylhexanoate, dimethylpolysiloxane, methylphenylpolysiloxa , Chain polysiloxanes such as diphenylpolysiloxane, cyclic polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexanesiloxane, amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine Oil agents such as silicone oil such as modified polysiloxane such as modified polysiloxane, fatty acid soap (sodium laurate, sodium palmitate, etc.), anionic surfactants such as potassium lauryl sulfate, triethanolamine ether of alkyl sulfate, stearyl chloride Cationic surfactants such as trimethylammonium, benzalkonium chloride, laurylamine oxide, imidazoline-based amphoteric surfactants (2-cocoyl-2-imidazolinium Muhydroxide-1-carboxyethyloxy disodium salt, etc.), betaine surfactants (alkyl betaine, amide betaine, sulfobetaine, etc.), amphoteric surfactants such as acylmethyltaurine, sorbitan fatty acid esters (sorbitan mono) Stearates, sorbitan sesquioleate, etc.), glycerin fatty acids (glyceryl monostearate, etc.), propylene glycol fatty acid esters (propylene glycol monostearate, etc.), hardened castor oil derivatives, glycerin alkyl ethers, POE sorbitan fatty acid esters ( POE sorbitan monooleate, polyoxyethylene sorbitan monostearate, etc.), POE sorbite fatty acid esters (POE-sorbite monolaurate, etc.), POE glycerin fatty acid ester (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 / POP2-decyltetradecyl ether, etc.), Tetronics, POE castor oil / hardened castor oil derivatives (POE castor oil, POE hardened castor oil, etc.), sucrose Nonionic surfactants such as fatty acid esters and 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, 1,2-hexanediol, 1,2-octanediol and other polyhydric alcohols, pyrrolidone carboxylic acid Moisturizing ingredients such as sodium, lactic acid, sodium lactate, guar gum, quince seed, carrageenan, galactan, gum arabic, pectin, 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 sulfate, hydroxy Cyethyl guar gum, carboxymethyl guar gum, dextran, keratosulfuric acid, locust bean gum, succinoglucan, caronic acid, chitin, chitosan, carboxymethyl chitin, agar, polyvinyl alcohol, polyvinyl pyrrolidone, carboxyvinyl polymer, sodium polyacrylate, polyethylene Thickeners such as glycol and bentonite, surface may be treated, powders such as mica, talc, kaolin, synthetic mica, calcium carbonate, magnesium carbonate, silicic anhydride (silica), aluminum oxide, barium sulfate Surface may be treated, bengara, yellow iron oxide, black iron oxide, cobalt oxide, ultramarine, bitumen, titanium oxide, zinc oxide inorganic pigments, surface may be treated, titanium mica, fish Phosphorous foil, bismuth oxychloride, etc. Red, No. 202, Red No. 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 Organic dyes such as red 213, yellow 204, yellow 203, blue 1, green 201, purple 201, red 204, polyethylene powder, polymethyl methacrylate, nylon powder, organopolysiloxane elastomer, etc. Organic powders, powders coated with a bio-component-like polymer such as a copolymer of methacryloyloxyalkylphosphorylcholine and alkyl methacrylate, paraaminobenzoic acid UV absorber, anthranilic acid UV Absorber, salicylic acid UV absorber, cinnamic acid UV absorber, benzophenone UV absorber, sugar UV Collector, ultraviolet absorbers such as 2- (2′-hydroxy-5′-t-octylphenyl) benzotriazole, 4-methoxy-4′-t-butyldibenzoylmethane, lower alcohols such as ethanol and isopropanol Vitamin A or derivatives thereof, vitamin B6 hydrochloride, vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2 or derivatives thereof, vitamin Bs such as vitamin B12, vitamin B15 or derivatives thereof, α-tocopherol, β-tocopherol, Vitamin Es such as γ-tocopherol and vitamin E acetate, vitamins D, vitamin H, vitamins such as pantothenic acid, pantethine and the like can be preferably exemplified, and can be contained as optional components. As a particularly preferred form, a coated plate-like powder containing a red pigment in the semi-transparent layer is selected as a coated plate-like powder having a coating layer containing a semi-transparent powder. The embodiment using a red coloration by the coated plate-like powder can be preferably exemplified by reducing the ratio depending on the colored pigment as much as possible. Specifically, a red or red-colored polymethylsiloxane baked treatment ( (Processing amount: 2% by mass; sometimes simply referred to as silicone treatment) The content of bengara is limited to 1.5% by mass or less, more preferably 1% by mass or less. By adopting such a form, the natural finish is improved and the sustainability of the makeup effect is also significantly improved.

The dosage form of the external preparation for skin of the present invention is not particularly limited, but makeup cosmetics are preferred, foundations are more preferred, liquid foundations and powder foundations can be exemplified, and powder foundations are more preferred. When using spherical silicone powder insoluble in the coated plate-like powder and oil as an external preparation for skin, if desired, the powder is coated with 5 to 25% by mass of an oil / fat component and molded into a solid. Thus, it can be prepared as a skin external preparation.

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.

Foundation A was prepared according to the formulation shown in Table 1 below.
First, (A) is mixed with a Hensyl mixer, and then (B) is added and further mixed uniformly. A product obtained by pulverizing this uniform mixture with a pulverizer was subjected to pressure molding.

Cream foundation A was prepared according to the formulation shown in Table 2 below.
First, (C) is uniformly dispersed at 75 ° C., and (B) is uniformly dispersed. Next, after adding (A) mixed in advance, the mixture is uniformly stirred again. Further, (D) heated to 75 ° C. is gradually added and stirred to obtain an emulsion. The emulsion was cooled to 30 ° C. with water cooling while stirring.

Solid foundation A was prepared according to the formulation shown in Table 3 below.
First, (B) is dissolved at 95 ° C. and uniformly stirred, and (A) is uniformly dispersed. The uniform dispersion was filled in a heat-resistant container and then cooled to 30 ° C. by air cooling.

(Evaluation of spreadability of foundation)
The extensibility evaluation was performed for Example 1 and Comparative Examples 1 to 3 shown in Table 4.
The evaluation method takes each powder foundation shown in Table 4 as a puff and applies a certain amount to black artificial leather. MIU (average friction coefficient) and MMD (variation value of average friction coefficient) were measured on the coated surface using a friction tester KES-SE-STP (manufactured by Kato Tech). Each measured value was used as an index relating to the following feeling.
MIU (average coefficient of friction): An indicator of "lightness of spread (ease of sliding)". The smaller the value, the lighter the elongation and the easier it is to slip.
MMD (fluctuation value of average friction coefficient): An index of “smoothness” and “roughness”. The smaller the value, the smoother and less grainy.
The results are shown in Table 5.

As shown in Table 5, in Foundation A containing spherical silicone powder insoluble in the coated plate powder and oil, it is clear that the spreadability is good from the MIU value and MMD value.

(Use Test of Foundation) 10 female panelists aged 21 to 42 years old apply the foundations of Examples and Comparative Examples one day a day to the face in an amount of about 0.1 g at 9 am, Each foundation was evaluated according to the criteria shown in Table 6 with respect to three items of natural finish feeling, spread, and long-lasting makeup effect. Table 7 shows the evaluation results.

As is clear from the evaluation test results, the foundation of the present invention has a natural finish as compared with the conventional one, and has a good spread at the time of application.

Solid foundation B was prepared according to the formulation in Table 9 as in Example 3. According to the evaluation scale shown in Table 8, a specialized panel was used for the three items of the natural finish feeling, the spread, and the persistence of the makeup effect. A result is as showing in Table 10, and it turns out that it is preferable to set content of a bengara and a silicone processing bengara to 1.5 mass% or less.

The present invention can be applied as a skin external preparation such as makeup cosmetics.

Claims (7)

An external preparation for skin, comprising 1) a coated plate-like powder having a coating layer containing a translucent powder, and 2) a spherical silicone powder that is insoluble in an oil. The skin external preparation according to claim 1, wherein the translucent powder is silicic anhydride. The skin external preparation according to claim 1 or 2, wherein the coating layer in the coated plate-like powder contains iron oxide. The external preparation for skin according to any one of claims 1 to 3, wherein the spherical silicone powder insoluble in the oil is a powder composed of silicone rubber and silicone resin. Spherical silicone powder insoluble in the oil is selected from the group consisting of vinyl dimethicone / methicone / silsesquioxane crosspolymer, diphenyldimethicone / vinyldiphenyldimethicone / silsesquioxane crosspolymer, and polymethylsilsesquioxane. The skin external preparation according to any one of claims 1 to 4, wherein the skin external preparation is one or more kinds. The skin external preparation according to any one of claims 1 to 5, wherein the content of Bengala or hydroxymethylpolysiloxane-coated Bengala is 1% by mass or less. It is a makeup cosmetic, The skin external preparation in any one of Claims 1 thru | or 6 characterized by the above-mentioned.