JP2012140359A - Powder cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder cosmetic that has a superior durability of makeup effects, good touch in use such as feel to the skin, spreadability, etc., a moist feeling free from powdery impression when used and high effects in glossy feeling of finish.SOLUTION: The powder cosmetic is prepared by using (A) a hydrophobized inorganic white pigment, (B) a silicone powder dispersion, (C) an oil agent and (D) boron nitride.

Description

  The present invention relates to a powder cosmetic.

  Conventionally, in powder cosmetics, inorganic white pigments with a high refractive index, such as titanium oxide, are blended for the purpose of imparting an ultraviolet shielding effect and covering effects such as hiding skin defects. The more the amount of was added, the higher the ultraviolet ray shielding effect and the cover effect, but the heavier the spread on the skin, and the extensibility such as squeakiness and catching tended to deteriorate.

  Therefore, in order to improve the feeling of use, it is common to blend spherical resin powder, but among them, a method of blending silicone powder such as silicone elastomer for the purpose of imparting a feeling of use such as softness and smoothness. (See Patent Document 1). However, since the silicone elastomer has a high cohesiveness, it is very difficult to uniformly disperse the powder in the cosmetic. For this reason, development of a technique for modifying the cosmetics so that they can be easily blended using a method using a closed multi-stage shear shear extruder (see Patent Document 2), a method using a wet pulverizer (see Patent Document 3), and the like. However, when powder cosmetics containing these modified silicone elastomers are manufactured by the usual dry manufacturing method, the extensibility and smooth feel are improved, but the silicone elastomer has a high oil-absorbing property. For this reason, at the time of use, the feeling of use from the aspect of powderiness peculiar to powder cosmetics was not sufficient. In addition, the finish has a tendency to increase foggy feeling, and is not sufficient in terms of gloss.

  In order to solve such problems, a method of performing a composite treatment with crystalline cellulose to improve the feeling of use of the inorganic white pigment (see Patent Document 4), or a water-soluble polymer to improve the powderiness Various attempts have been made, such as a method of blending (see Patent Document 5).

JP-A-8-26932 Japanese Patent No. 3126553 Japanese Patent No. 3468971 JP 2008-214298 A JP 2010-37216 A

However, blending inorganic white powder or water-soluble polymer compounded with crystalline cellulose into cosmetics improves skin feel and extensibility, but is still satisfactory in powderiness. In addition, it was not sufficient in terms of the glossy finish.
Accordingly, the problem of the present invention is that the cosmetic effect is excellent in persistence, the skin feel and extensibility are excellent in use feeling, there is no powderiness at the time of use, and there is a moist feeling. Is to provide a powder cosmetic with a high effect.

  As a result of studies by the present inventor in order to achieve the above object, (A) an inorganic white pigment subjected to a hydrophobization treatment, (B) a dispersion of silicone powder, (C) an oil agent, and (D) boron nitride. By using a powder cosmetic, the makeup effect is durable, the skin feel and extensibility are good, and there is no powderiness during use, and there is a moist feeling. As a result, the present inventors have found that an unprecedented high effect can be obtained even in the glossy feeling.

That is, this invention provides the powder cosmetics prepared using the following component (A)-(D).
(A) Hydrophobized inorganic white pigment (B) Silicone powder dispersion (C) Oil (D) Boron nitride

  According to the present invention, even when a large amount of an inorganic white pigment such as titanium oxide is blended, the cosmetic effect is excellent, the touch to the skin, the use feeling such as extensibility, etc. In addition, there is a feeling of moistness, and even in the gloss of the finish, it is possible to obtain an unprecedented high effect.

  Hereinafter, embodiments of the present invention will be described in detail.

  The inorganic white pigment of component (A) in the present invention is not particularly limited as long as it is usually used in cosmetics, and is titanium oxide, zinc oxide, aluminum oxide, barium sulfate, zirconium oxide, cerium oxide, fine particle titanium oxide. In particular, titanium oxide, zinc oxide, fine particle titanium oxide, and fine particle zinc oxide are preferable from the viewpoint of versatility. These inorganic white pigments can be used alone or in combination. Although there is no restriction | limiting in particular as a particle diameter of an inorganic white pigment, A thing with an average primary particle diameter of 0.001-2.0 micrometers is preferable.

  In the present invention, the hydrophobization treatment of component (A) is to coat the inorganic white pigment with various hydrophobic compounds to hydrophobize the pigment surface. The hydrophobized powder is an ion This refers to a product in which 0.5 g of hydrophobized powder is added to 100 mL of exchange water, and after standing for 1 hour at room temperature, visual evaluation is performed, and most of the powder is floating on the water surface. As the surface treatment method, a conventionally known surface treatment method, for example, oil agent treatment with wax or squalane oil, N-acylated amino acid treatment such as Nε-lauroyl-L-lysine (Ajinomoto Co., Amihop LL), zinc salt of fatty acid. Or metal soap treatment using magnesium salt, silicone treatment with dimethylpolysiloxane or methylhydrogenpolysiloxane, treatment with silane or titanate such as alkylalkoxysilane, or fluorine compound treatment such as perfluoroalkyl phosphate. The surface treatment method can be carried out by a dry method, a wet method (solvent type, aqueous type, mixed type), a mechanochemical method or the like. The amount of the surface treatment varies depending on the type of the surface treatment agent, but is generally preferably 0.1 to 30% by mass, more preferably 1 to 10% by mass with respect to the powder in mass ratio.

  The content of the component (A) hydrophobized inorganic white pigment in the present invention is preferably 0.1 to 40% by mass, particularly preferably 1 to 30% by mass, based on the total amount of the powder cosmetic. When the content is 0.1% by mass or more, a cover effect sufficient for finishing can be obtained, and when it is 40% by mass or less, a natural finish is obtained.

  The dispersion of the component (B) silicone powder used in the powder cosmetic of the present invention is one in which the silicone powder is stably and uniformly dispersed in a solvent such as water. Examples of the properties of the dispersion include liquid, cream, and slurry, but are preferably liquid in terms of ease of uniform dispersion in a powder cosmetic. Further, examples of the shape of the silicone powder include a spherical shape, a flat shape, and an indefinite shape, but a spherical shape is preferable in consideration of slipperiness to the skin.

  Examples of the silicone powder used in the present invention include silicone resin powder, silicone elastomer powder, silicone resin-coated silicone elastomer powder, and the like, and one or more of these can be used. Among these, silicone elastomer powder is preferable because it is excellent in use feeling such as smoothness and softness.

  The average primary particle size of the silicone powder is preferably in the range of 0.1 to 100 μm, more preferably 1 to 20 μm. When the average primary particle diameter of the silicone powder is within this range, it is possible to impart a remarkable effect of improving slipperiness when using a cosmetic, and there is no feeling of roughness and the feel is good.

  Examples of the solvent for dispersing the silicone powder include water, linear dimethylpolysiloxane having a polymerization degree of 0 to 5, and polymerization degrees of 3 to 7 such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. Volatile silicones such as cyclic silicones, and lower alcohols such as ethanol. The content of the silicone powder in the dispersion medium is preferably 25 to 75% by mass, and more preferably 40 to 70% by mass, from the point of use feeling.

  Specific examples of the dispersion of (B) silicone powder in the present invention include BY29-129 (solid content 63%, average particle size 4 μm, manufactured by Toray Dow Corning Co., Ltd.), and water, alcohol, etc. It is also possible to use after adjusting the viscosity such as adding. It is also possible to use silicone powder dispersed in a solvent such as water in advance to a state close to primary particles. For example, a medium-type pulverizer such as a micros or a bead mill can be used as the dispersion method. However, the dispersion method is not limited to this as long as the silicone powder is stably and uniformly dispersed in a solvent such as water. Examples of the silicone powder include Toray Fill series (Torefill E505C, Trefil E508, etc.) manufactured by Toray Dow Corning, and KSP series (KSP-100, KSP-101, etc.) manufactured by Shin-Etsu Chemical Co., Ltd. .

  The blending amount of the silicone powder dispersion as the component (B) in the present invention into the powder cosmetic can be changed according to the dosage form of the cosmetic and the pure amount (solid content) of the silicone powder of the component (B). However, the silicone powder pure content (solid content) is preferably 0.1 to 80 mass%, more preferably 1 to 50 mass%, based on the total amount of the powder cosmetic. When the content is 0.1% by mass or more, the effect of the present invention can be sufficiently exhibited.

  The oil agent of the component (C) in the present invention is not particularly limited as long as it is used in ordinary cosmetics, such as animal oil, vegetable oil, synthetic oil, solid oil, semi-solid oil, liquid oil, etc. Regardless of properties, oil agents such as higher alcohols, fatty acids, polyhydric alcohols, hydrocarbons, fats and oils, waxes, hardened oils, ester oils, silicone oils, fluorine oils, lanolin derivatives, etc. . Examples include higher alcohols such as cetyl alcohol, isostearyl alcohol, lauryl alcohol, hexadecyl alcohol, octyldodecanol; fatty acids such as isostearic acid, undecylenic acid, oleic acid; glycerin, sorbitol, ethylene glycol, propylene glycol, polyethylene glycol Polyhydric alcohols such as myristyl myristate, hexyl laurate, decyl oleate, isopropyl myristate, hexyl decyl dimethyloctanoate, glyceryl monostearate, diethyl phthalate, ethylene glycol monostearate, octyl oxystearate Hydrocarbons such as liquid paraffin, petroleum jelly and squalane; waxes such as lanolin, reduced lanolin and carnauba wax; mink Oils such as cocoa butter, palm oil, palm kernel oil, camellia oil, sesame oil, castor oil, olive oil; dimethylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, polyether-modified organopolysiloxane, fluoroalkyl poly Oxyalkylene co-modified organopolysiloxane, alkyl-modified organopolysiloxane, terminal-modified organopolysiloxane, fluorine-modified organopolysiloxane, amino-modified organopolysiloxane, silicone compounds such as silicone gel, fluorine compounds such as perfluoropolyether and fluoroalcohol One or two or more of these can be used.

  The content of these component (C) oils is not particularly limited, but is generally preferably 1 to 30% by mass based on the total amount of the powder cosmetic. When component (C) is blended within this range, a smooth and excellent extensibility and a moist feeling that is not powdery and moist is obtained.

  As the boron nitride (BN) as the component (D) in the present invention, hexagonal h-BN, wurtzite structure w-BN, cubic c-BN, rhombohedral r-BN, and turbostratic structure t-BN Although it may consist of either, what consists of hexagonal crystal h-BN which has favorable lubricity in cosmetics is preferable. Moreover, the thing with an average primary particle diameter of 0.1-30 micrometers is preferable from the point of lubricity and roughening prevention. Examples of commercially available products include boron nitride SHP-3, SHP-4, SHP-5, SHP-6, and SHP-7 (manufactured by Mizushima Alloy Iron Co., Ltd.).

  The content of boron nitride as the component (D) in the present invention in the powder cosmetic can be changed according to the dosage form of the cosmetic, but is preferably 5 to 95% by mass based on the total amount of the powder cosmetic. More preferably, it is 10-70 mass%. When the amount is 5% by mass or more, a finished gloss feeling can be sufficiently expressed. On the other hand, when it is 95% by mass or less, the moldability when solidified is preferable.

  Since the powder cosmetic of the present invention contains a large amount of boron nitride as the component (D), (E) extender pigments other than boron nitride, such as talc, mica, sericite, kaolin, and synthetic phlogopite, 0 to 30% by mass, particularly preferably 0 to 15% by mass, based on the total amount. Here, the content of the (E) extender pigment may be zero. The content mass ratio of (D) component boron nitride and (E) extender is preferably 10: 0.1 to 10: 8, particularly preferably 10: 1 to 10: 3. In the said range, the powder cosmetics of this invention do not have a powdery especially at the time of use, and become excellent in the glossiness of a finish.

  In addition to the above-mentioned components, the powder cosmetic of the present invention can be blended with components that are usually blended in cosmetics as long as the effects of the present invention are not impaired. Examples of powders include, for example, organic dyes such as Red No. 104, Red No. 102, Red No. 226, Red No. 201, Blue No. 404; Blue No. 1 aluminum lake, Yellow No. 4 aluminum lake, Yellow No. 203 barium lake, etc. Lake pigments: yellow iron oxide, bengara, black iron oxide, chromium oxide, carbon black, ultramarine, bitumen and other colored pigments; pearl pigments such as titanium mica; nylon powder, polymethyl methacrylate powder, silk powder, urethane powder, Organic powders such as cellulose powder, Teflon (registered trademark) powder and polyethylene powder; bentonite, smectite and the like. The size of the powder is preferably in the range of 5 nm to 100 μm, more preferably 10 nm to 25 μm. Further, these powders may be blended after hydrophobizing treatment or composite treatment.

  Other ingredients include surfactants, stickers, preservatives, fragrances, UV protection agents (including organic UV absorbers), physiologically active ingredients, humectants, salts, antioxidants, etc. Can do.

In the method for producing a powder cosmetic of the present invention, a dispersion of a hydrophobicized inorganic white pigment, boron nitride, an oil agent, and a silicone powder is uniformly mixed by a conventional method. The normal method here is, for example, a method of mixing by an agitating action such as a V-type mixer, a ribbon mixer, or a Henschel mixer, and then pulverizing with an impact-type pulverizer such as a hammer mill or a pin mill. Examples thereof include a method using a pulverizer that also serves as an appropriate mixer, a trelo mixer, a planetary mixer, and a kneader. At this time, a surfactant, alcohol, or moisture may be added in an auxiliary role of mixing. When water is added to the above mixture, the amount of water added varies depending on the composition of the cosmetic powder, the type and amount of the oil agent, and the production method, but considering the effect of the present invention and the efficiency of drying, 2-30 mass parts is preferable with respect to 100 mass parts of powder cosmetics. Next, a solvent such as moisture is removed from the mixture thus obtained. The apparatus to be used is not particularly limited as long as it is for the purpose of removing water or a solvent such as alcohol added if necessary.
In the present invention, by using a dispersion of silicone powder and providing a drying process in the manufacturing process, the feeling of use such as lightness and moist feeling, and the gloss of the finish, compared with the case of simply using silicone powder. The feeling is excellent.

  Although it does not specifically limit as a specific use of the powder cosmetics of this invention, Foundation, white powder, body powder, eye shadow, blusher, eyebrow, etc. are mentioned, Any of powder form and solid form may be sufficient. Among these, as a form in which the effect of the present invention is easily exhibited, it is a solid powder makeup cosmetic.

  Hereinafter, the present invention will be described in detail by way of examples and comparative examples. The present invention is not limited to these examples. Unless otherwise specified, the blending amount indicates mass%.

(Skin utility evaluation)
Using 20 cosmetic panels, after washing the face, apply Examples and Comparative Examples, feel to use (lightness, no powderiness, moist feeling), finished gloss, cover effect, 3 The makeup persistence after time was evaluated according to the following evaluation criteria.

Criteria judgment
More than 18 out of 20 felt good ◎
15-17 people out of 20 felt good ○
11-14 out of 20 felt good △
10 or less out of 20 felt good ×

Examples 1-3, Comparative Examples 1-5 (powder foundation)
A powder foundation was prepared from each component shown in Table 1.

Note 1: Prepared by the method described in JP-A-2008-214298, Production Example 1 Note 2: SHP-3 (manufactured by Mizushima Alloy Iron Company)
Note 3: Silicon BY29-129 (Toray Dow Corning) solid content 63%
Note 4: Trefill E-505C (Toray Dow Corning)

(Production method)
(Examples 1 to 3, Comparative Examples 1, 2, 4, and 5)
A powder foundation was prepared by the following method using raw materials having the composition shown in Table 1. The powder components (1) to (10) are uniformly mixed with a Henschel mixer, and a mixture of the preservative (11), the oil agent components (12) to (14), and the aqueous dispersion of the silicone elastomer (15) is added thereto. In addition, it was mixed until uniform again. The mixture was put into a hot air dryer, dried at 50 ° C. for 4 hours, then filled in a metal pan and press-molded to obtain a powder foundation.
(Comparative Example 3)
In advance, silicone elastomer (16) is uniformly mixed using a part of powder component (8) in a closed multi-stage shear shear extruder, and this is uniformly mixed with powder components (1) to (10). Preservative (11), oil component (12-14), and purified water (17) were added and mixed until uniform again. The mixture was put into a hot air dryer, dried at 50 ° C. for 4 hours, then filled in a metal pan and press-molded to obtain a powder foundation.

  From the above results, the examples of the present invention are superior to the comparative examples in lightness of use, moist feeling without powderiness, finished gloss, finished cover effect, and makeup durability. You can see that On the other hand, evaluation was bad in any item in the comparative example.

Example 4, Comparative Example 5 (solid white powder)
Solid white powder was prepared from each component shown in Table 2.

Note 2: SHP-3 (made by Mizushima Alloy Iron Company)
Note 3: Silicon BY29-129 (Toray Dow Corning)

(Production method)
(Example 4, Comparative Example 5)
Using the raw material which consists of a composition shown in Table 2, solid white powder was prepared with the following method. The powder components (1) to (10) are uniformly mixed with a Henschel mixer, and a mixture of the preservative (11), the oil agent components (12) to (14), and the aqueous dispersion of the silicone elastomer (15) is added thereto. In addition, it was mixed until uniform again. The mixture was put in a hot air dryer, dried at 50 ° C. for 4 hours, then filled in a metal pan and press-molded to obtain a solid white powder.

  As is apparent from Table 2, the powder cosmetic according to the present invention has a light weight, a moist feeling without powderiness, a glossy finish, a finished cover effect, and a makeup persistence. The item was also excellent.

  The powder cosmetic of the present invention is excellent in durability of the makeup effect and improves the feeling of use such as poor spread, squeaky feeling, and squeaky feeling, which was a problem when a large amount of inorganic white pigment was blended. It is possible to obtain a powder cosmetic that is free from powder and has a moist feeling and is highly effective and yet has a high gloss effect.

Claims (5)

Powder cosmetics prepared using the following components (A) to (D).
(A) Hydrophobized inorganic white pigment (B) Silicone powder dispersion (C) Oil (D) Boron nitride   The powder cosmetic according to claim 1, wherein the content of component (D) boron nitride is 5 to 95 mass% based on the total amount of the powder cosmetic.   The powder cosmetic according to claim 1 or 2, comprising 0 to 30% by mass of the component (E) extender pigment based on the total amount of the powder cosmetic.   The component (A) hydrophobized inorganic white pigment is one or more selected from hydrophobized titanium oxide, hydrophobized zinc oxide, hydrophobized fine particle titanium oxide and hydrophobized fine particle zinc oxide. The powder cosmetic according to any one of the above.   The powder cosmetic according to any one of claims 1 to 4, which is obtained through a drying step after uniformly mixing at least components (A) to (D).