JP2010280619A - Composite powder and makeup cosmetic formulated therefrom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composite powder which does not cause color darkening with the lapse of time when it is formulated into a makeup cosmetic, particularly an emulsion foundation, and to provide a makeup cosmetic formulated therefrom. <P>SOLUTION: This composite powder is prepared by applying an inorganic colorant to the surface of a flaky powder and hydrophobizing the surface, and the makeup cosmetic is formulated from the composite powder. It is particularly desirable that the makeup cosmetic is an emulsion foundation. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a composite powder that hardly changes in color over time, and a makeup cosmetic containing the composite powder.

  The emulsification foundation has a fresh feeling of use. In particular, the water-in-oil emulsification foundation using silicone oil has a characteristic that a refreshing refreshing feeling can be obtained (Non-patent Document 1). However, it has been known that the emulsification foundation has a problem that even if it is a preferable color tone immediately after application, the color tone becomes darker and reddish black as time passes.

  For example, Patent Document 1 describes that the pigment surface is coated with silica to make it difficult to get wet with sebum and sweat and to suppress changes in the color tone and concealability of the pigment. Patent Document 2 describes a powder cosmetic obtained by coating the surface of pigment powder with two types of silicone layers, branched silicone and methylhydrogenpolysiloxane, and heat-treating the powder powder. It is said that color change (dullness) due to can be suppressed.

  However, what is described in these documents is a technology that suppresses color change based on changes in light reflectance and scattering coefficient of pigment due to wetness of pigment blended in so-called solid foundation by sweat or sebum, Originally, the effect in liquid cosmetics such as an emulsification foundation containing a large amount of liquid components (water and oil) has not been confirmed.

International Publication No. WO98 / 26011 Pamphlet JP 2006-176557 A

New Cosmetic Science (2nd edition), Takeo Mitsui, published by Nanzan-do, 2001, p. 415

  Therefore, the subject in this invention is providing the makeup powder which mix | blended the composite powder which does not produce a color dullness even if time passes, when it mix | blends with makeup cosmetics, especially an emulsion foundation.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that color change over time can be suppressed by using a hydrophobized powder obtained by combining a coloring material with a flaky powder. The present invention has been completed.

  That is, the present invention provides a composite powder characterized in that an inorganic color material is supported on the surface of a flaky powder, and the surface is further hydrophobized, and a makeup cosmetic containing the composite powder. To do.

  The composite powder of the present invention maintains a good color tone for a long time immediately after application, even when blended in a liquid makeup cosmetic such as an emulsified foundation containing a large amount of water and oil, with the passage of time. can do.

As described above, the composite powder of the present invention is obtained by hydrophobizing the surface of a composite powder in which an inorganic color material is supported on the surface of a flaky powder.
The flaky powder used in the present invention is generally referred to as flaky (or plate-like, scale-like) powder, and may be one usually used in the cosmetic field, and is not particularly limited. Specific examples include flaky powders such as mica, talc, sericite, kaolin, plate-like barium sulfate, alumina, boron nitride, phlogopite, synthetic phlogopite, and silica.

  The particle size of the flaky powder is not particularly limited, but a powder having an average particle size of usually 1 to 50 μm, preferably 3 to 30 μm is preferably used.

  In the present invention, an inorganic color material is supported on the surface of the flaky powder. The inorganic color material may be an inorganic color material used in cosmetics, for example, bengara, yellow iron oxide, black iron oxide, titanium oxide, or the like. Examples of commercially available products include Bengala # 216P manufactured by Daito Kasei Kogyo Co., Ltd., TAROX synthetic iron oxide LL-100P manufactured by Titanium Industry Co., Ltd., TAROX synthetic iron oxide BL-100P manufactured by the same company, TAROX synthetic iron oxide E-516P manufactured by the same company, Ishihara Sangyo For example, TYPEPEC CR-50 manufactured by the company, SACHTLEBEN RC402 manufactured by SACHTLEBEN, and the like can be given.

  The particle size of the inorganic color material is not particularly limited, but an inorganic color material having an average particle size of usually 0.1 to 1 μm, preferably 0.2 to 0.6 μm is preferably used.

  In the composite powder of the present invention, the inorganic color material is supported on the surface of the flaky powder. “Supported” in the present invention means that the coloring material is attached to the surface of the flaky powder by some force, and the mechanism is not particularly limited, and physical adsorption such as chemical adsorption or electrostatic adsorption Including adhesion by.

  A method for supporting the inorganic color material on the flaky powder is not particularly limited. For example, a flaky powder and an inorganic color material are dispersed in a dispersion medium, and adsorption is caused by the interaction between the two in the dispersion medium. Obtainable.

  The ratio of the flaky powder and the inorganic color material in the composite powder of the present invention is not particularly limited, but is generally in the range of 2: 8 to 8: 2 by weight.

  The flaky fine powder thus obtained is said to have better dispersibility when blended in cosmetics than when an inorganic color material is used alone, and the feel of the resulting cosmetics will be better. (See JP-A-9-132514). However, since the flaky fine powder described in JP-A-9-132514 is not hydrophobized, when blended with a water-in-oil emulsion, color development and makeup persistence are poor, and the emulsion base It is considered that the stability of the emulsion is weak, and it has not been suggested at all how such a structure affects the color change of the emulsified cosmetic.

On the other hand, the composite powder of the present invention is treated as a composite powder in an emulsified base by hydrophobizing the surface of the flaky powder carrying the inorganic color material obtained as described above. It is characterized by having improved stability.
The hydrophobizing treatment in the present invention can be carried out by using a technique usually used in the cosmetic field. Specifically, it can be carried out by surface treatment using a hydrophobizing agent as described below.

(1) Methyl hydrogen polysiloxane (Shin-Etsu Chemical Co., Ltd. silicon KF99P), methyl hydrogen polysiloxane / dimethyl polysiloxane copolymer (Shin-Etsu Chemical Co., Ltd. silicon KF-9901), dimethyl polysiloxane, JP-A-2001-72891 Branched silicone-based (ethoxy functional) treatment agents (trade names: KF9908, KF9909, manufactured by Shin-Etsu Chemical Co., Ltd.), and silicones such as acrylic silicone treatment agents (trade name: KP574, manufactured by Shin-Etsu Chemical Co., Ltd.) described in WO2004 / 091563. Processing used.

(2) Treatment using an alkylalkoxysilane compound such as octyltriethoxysilane (DYNASILAN OCTEO manufactured by EVONIK DEGUSSA), hexyltrimethoxysilane, octadecyltriethoxysilane or the like.
(3) Treatment using fatty acids such as palmitic acid and stearic acid.
(4) Alkylated saccharide treatment such as dextrin palmitate in which a part of the hydroxyl group of dextrin is alkylesterified; metal soap treatment using an alkali metal salt or alkaline earth metal salt of a fatty acid.

(5) Treatment of amino acids such as N-lauroyl-L-lysine, glutamic acid or its alkali salt, and acylated amino acid.
(6) Perfluoroalkyl phosphoric acid diethanolamine salt, perfluoroalkyl phosphoric acid, perfluorohexylethyltriethoxysilane, perfluorooctylethyltriethoxysilane, a copolymer containing a functional group having a perfluoroalkyl chain length of C4 to C6, etc. Fluorine treatment using
(7) Treatment with quaternary ammonium salt such as distearyldimethylammonium chloride.
The composite powder of the present invention can be obtained by treating with the hydrophobizing agent as described above.

  The present invention also provides a makeup cosmetic containing the composite powder. The makeup cosmetic compounded with the composite powder of the present invention is not limited, but when it is a foundation, particularly an emulsified foundation, especially a water-in-oil emulsion foundation, it exhibits the features of the composite powder of the present invention. It is preferable because it is easy.

  The compounding amount of the composite powder in the makeup cosmetic of the present invention is generally 0.01 to 50% by mass, preferably 0.01 to 25% by mass, more preferably 2 to 20% by mass, It is particularly preferable that the composite powder occupies 50% or more of the total blending amount of the colorant blended in the cosmetic because the effect is more exhibited. Depending on the purpose and application of the cosmetic, there may be a combination of a plurality of inorganic color materials. For example, in the case of a cosmetic with a high content of white color materials such as foundation (such as titanium oxide) The white color material is preferably a composite powder.

  Further, the preferable blending amount can be appropriately selected within the above range depending on the purpose and / or application of the cosmetic, but depending on the color of the composite powder (the color of the inorganic color material constituting the composite powder). May be different. Usually, when the inorganic color material is a white color material such as titanium oxide, the preferable blending amount is 0.1 to 30% by mass, more preferably 0.1 to 25%, and in the case of a red color material such as Bengala. In the case of a yellow color material such as yellow iron oxide, 0.1 to 25% by mass, more preferably 0.1 to 20% by mass. In the case of a black color material such as black iron oxide, the content is 0.01 to 10% by mass, more preferably 0.01 to 5% by mass.

  The makeup cosmetic of the present invention is preferably a liquid cosmetic, particularly an emulsion foundation. The emulsification foundation may be either a water-in-oil type or an oil-in-water type, but is particularly preferably a liquid type or cream type water-in-oil type emulsification foundation.

Further, the makeup cosmetic of the present invention may contain volatile components (volatile oil and water) in the range of 10 to 90% by mass, preferably 20% or more, more preferably 40% by mass or more. Good. By containing a large amount of volatile oil, it is excellent in spreading when applied to the skin, and a refreshing feel can be obtained.
The volatile oil content is not particularly limited, but volatile silicone oils such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, dimethylpolysiloxane (low molecular weight), decane, isodecane, dodecane, isododecane. Typical examples include hydrocarbon oils such as tetradecane, isotetradecane, hexadecane, isohexadecane, octadecane, and isooctadecane.

  The makeup cosmetic of the present invention may contain other components usually used in makeup cosmetics as long as the effects of the present invention are not impaired.

Hereinafter, the present invention will be described in more detail with specific examples, but the present invention is not limited to the following examples. Moreover, the compounding quantity in a following example etc. shows the mass% unless there is particular notice.
(Production Example 1)
Synthesis of Bengala / mica composite powder (hydrophobized product) “Bengara (R-516P manufactured by Titanium Industry Co., Ltd.) / Mica (Yamaguchi Mica Industrial Co., Ltd. Y” obtained by the method described in JP-A-9-132514 −1800) ”(1: 1) The composite powder was obtained by dry-mixing 2 g of a silicone surface treatment agent (KF-9909 (manufactured by Shin-Etsu Chemical Co., Ltd.)) with a mixer.

(Production Example 2)
Synthesis of yellow iron oxide / mica composite powder (hydrophobized product) Synthesis was performed in the same manner as in Production Example 1 except that Bengala in Production Example 1 was changed to yellow iron oxide (LL-100P manufactured by Titanium Industry Co., Ltd.).

(Production Example 3)
Synthesis of iron oxide / mica composite powder (hydrophobized product) Synthesis was performed in the same manner as in Production Example 1 except that Bengala in Production Example 1 was replaced with black iron oxide (BL-100P manufactured by Titanium Industry Co., Ltd.).

(Production Example 4)
Synthesis Example 1 of Titanium Oxide / Mica Composite Powder (Hydrophobized Product) Production Example 1 except that Bengala in Production Example 1 was changed to Titanium Oxide (Taipaque CR-50 manufactured by Ishihara Sangyo Co., Ltd., primary particle size: about 0.3 μm) Was synthesized in the same manner as above.

Example 1
Water-in-oil emulsified foundations having the compositions listed in Table 1 below were prepared. Each foundation was applied to the artificial skin surface, and the color tone immediately after application, 60 minutes later and 120 minutes later was measured with a colorimeter, and the change from the color tone immediately after application (color difference (ΔE)) was calculated. The results are also shown in Table 1. Further, the makeup-holding effect (dullness) over time of the water-in-oil emulsion foundation was evaluated by the following evaluation method.
<Evaluation method>
A sensory test was conducted on each evaluation item by using 10 cosmetic panelists actually using cosmetics. Evaluation results were evaluated according to the following three levels.
○: 7 or more out of 10 people judged good
Δ: Four to six out of 10 people judged good
X: 3 or less out of 10 people judged good

In Table 1, the composition of an oil phase base, an aqueous phase base, and other powder bases is as follows (unit: mass%).
Oil phase base:
Decamethylcyclopentasiloxane 20.39
Polyoxyethylene / methylpolysiloxane copolymer 3
Methylphenylpolysiloxane 1.5
Cetyl isooctanoate 2
Octyl methoxycinnamate 3
Isostearic acid 0.5
Total 30.39

Aqueous base:
Ion-exchanged water 39.3
Dynamite Glycerin 3
Dipropylene glycol 5
1,3-butylene glycol 2
Phenoxyethanol 0.5
EDTA-3Na2H ₂ O 0.2
Total 50

Other powder base:
Aluminum stearate treated titanium oxide 3
Spherical PMMA (average particle size: 5 μm) 3

  Compared with the comparative example 1 which mix | blended the conventional color material, as for the cosmetics of Example 1 which mix | blended composite powder, the color change after 60 minutes and 120 minutes was suppressed markedly. Even in the cosmetic of Comparative Example 2, the color change is suppressed to some extent, but since the hydrophobic treatment (lipophilic treatment) is not performed, the cosmetic is satisfactory in terms of long-lasting makeup (dullness). It was not obtained.

(Example 2)
A makeup cosmetic having the following composition was prepared.
Ingredient Amount (% by mass)
Microcrystalline wax 5
Dimethylpolysiloxane 10
Decamethylcyclopentasiloxane 15
Polyoxyethylene / methylpolysiloxane copolymer 2
Dipropylene glycol 3
Palmitic acid 0.5
Sorbitan sesquiisostearate 1
Alkyl-modified silicone resin-coated silicic acid anhydride 2
Compounded powder of Production Example 4 10
Composite powder of Production Example 1 0.86
Composite powder of Production Example 2 0.85
Composite powder of Production Example 3 0.1
Cross-linked silicone powder 3
Tocopherol acetate 0.1
δ-tocopherol 0.1
P-Hydroxybenzoate appropriate amount Merirot extract 2
Purified water residue

Production method:
After all the oily components have been weighed, they are heated to about 80 ° C. and uniformly dissolved. Thereafter, the powder component was added and stirred / dispersed. Further, the aqueous component was added and emulsified, followed by stirring for a predetermined time, filling in a predetermined container, and cooling to obtain a solid emulsified makeup cosmetic.

(Example 3)
Oil-in-water foundation component blending amount (% by mass)
Dimethylpolysiloxane 8
Behenyl alcohol 0.5
Batyl alcohol 0.5
1,3-Butylene glycol 5
Macadamia nut oil 0.1
Isostearic acid 1.5
Stearic acid 1
Behenic acid 0.5
Cetyl 2-ethylhexanoate 5
Polyoxyethylene glyceryl monostearate 1
Self-emulsifying glyceryl monostearate 1
Yellow iron oxide coated mica titanium 2
Composite powder of Production Example 4 4
Talc 0.5
Kaolin 3
Synthetic phlogopite 0.1
Cross-linked silicone powder 0.1
Silicic anhydride 5
Potassium hydroxide 0.2
Triethanolamine 0.8
DL-α-tocopherol acetate 0.1
Sodium hyaluronate 0.1
Paraoxybenzoic acid ester 2-ethylhexyl paramethoxycinnamate 1
Composite powder of Production Example 1 0.9
Composite powder of Production Example 2 1.2
Composite powder of Production Example 3 0.15
Xanthan gum 0.1
Bentonite 1
Sodium carboxymethylcellulose 0.1
Purified water Residual fragrance Appropriate amount

Claims (4)

A composite powder characterized in that an inorganic color material is supported on the surface of a flaky powder and the surface is further hydrophobized. A liquid makeup cosmetic comprising the composite powder according to claim 1. The cosmetic according to claim 2, comprising 30% by mass or more of a volatile component. The cosmetic according to claim 2 or 3, which is a water-in-oil emulsified foundation.