JP2002068937A - Powder-containing skin care preparation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means for controlling a messy makeup which cannot be solved only by conventional silicone treated powder and perfluoro treated powder. SOLUTION: This skin care preparation such as a cosmetic comprises [1] titanium dioxide coated with (1) aluminum oxide and (2) one or more kinds selected from silicic anhydride, a methylsiloxane network polymer and a crosslinking type methylpolysiloxane and [2] water-repellent treated powder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a skin external preparation suitable for cosmetics, especially makeup cosmetics.

[0002]

2. Description of the Related Art In powder-containing cosmetics such as make-up cosmetics, when the contained powder is applied on the skin, it absorbs sebum and changes into a dark color with time. Some phenomena are already known phenomena. This is considered as a so-called makeup collapse, and it is considered that the powders are wetted by sebum and their color changes. Because of this,
Technology to treat the powder so that it does not get wet with sebum has been developed,
Makeup has been improved. Such techniques include baking of the surface of the powder with dimethylpolysiloxane or hydrogenmethylpolysiloxane, alkylation using a silane coupling agent, perfluorination by coating with perfluoroalkylethyl phosphate diethanolamine salt, etc. Processing. Among them, the one with the highest effect is the perfluorination treatment. However, even if the powder subjected to the perfluorination treatment is used, there is still enough makeup loss that can be perceived, and the makeup loss is further increased. Development of improvement means was desired.

On the other hand, titanium dioxide coated with (1) aluminum oxide and (2) one or more selected from silicic anhydride, a methylsiloxane network polymer and a crosslinked methylpolysiloxane has a natural finish. It was developed as a component of a makeup cosmetic that provides the following, but it was not known at all that it was possible to obtain a cosmetic in which makeup collapse was significantly suppressed by combining this and the above-mentioned surface-treated powder. .

[0004]

SUMMARY OF THE INVENTION The present invention has been made under such circumstances, and suppresses makeup collapse that could not be solved only by conventional silicone-treated powder or perfluoro-treated powder. It is an object to provide means.

[0005]

In view of such circumstances, the present inventors have sought a means for suppressing makeup collapse that could not be solved only by conventional silicone-treated powder or perfluoro-treated powder. As a result of research efforts, titanium dioxide coated with (1) aluminum oxide and (2) one or more selected from silicic anhydride, a methylsiloxane network polymer and a crosslinked methylpolysiloxane, and water repellency By combining it with the treated powder, he discovered that he was a painter who embodies such a technique, and completed the invention. That is, the present invention relates to the following technology. {1} 1) (1) aluminum oxide and (2) silicic anhydride,
An external preparation for skin, comprising: titanium dioxide coated with one or more selected from a methylsiloxane network polymer and a crosslinked methylpolysiloxane; and 2) a water-repellent powder. {2} In titanium dioxide coated with (1) aluminum oxide and (2) one or more selected from silicic anhydride, a methylsiloxane network polymer and a crosslinked methylpolysiloxane, the average of the titanium dioxide Particle size 0.0
The external preparation for skin according to {1}, which is 1 to 10 μm. {3} The skin external preparation according to {1} or {2}, wherein the water-repellent treatment in the powder is a perfluoroalkylation treatment. {4} The skin external preparation according to {3}, wherein the perfluoroalkylation treatment is a coating treatment with perfluoroalkylethyl phosphoric acid diethanolamine salt and / or perfluoroalkylsilane. {5} Cosmetics, {1} to {4}
The external preparation for skin according to any one of claims 1 to 7. {6} for make-up, {5}
2. The external preparation for skin according to item 1. Hereinafter, the present invention will be described in more detail focusing on embodiments.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) One kind selected from (1) aluminum oxide and (2) silicic anhydride, a methylsiloxane network polymer and a cross-linked methylpolysiloxane, which are essential components of the skin external preparation of the present invention. Or a titanium dioxide coated with two or more kinds of the external preparation for skin of the present invention is one or more kinds selected from (1) aluminum oxide and (2) silicic anhydride, a methylsiloxane network polymer and a cross-linked methylpolysiloxane. It is characterized by containing titanium dioxide coated with two or more kinds as an essential component. Hereinafter, the titanium dioxide as an essential component of the present invention may be simply referred to as “coated titanium dioxide of the present invention”. Here, the order of the coating of (1) and (2) constituting the coated titanium dioxide of the present invention is the order of (1), (2) and (1), (2). It does not matter whether it is simultaneous or any. Regarding the coating method, a mechanochemical treatment of treating the powder with a planetary ball mill or the like, or a method of forming aluminum hydroxide or silica gel in an aqueous solution in which titanium dioxide is dispersed and firing the same may be used. In order to control the particle size and the like, it is preferable to use a mechanochemical treatment. Further, since the methylsiloxane network polymer and the crosslinked methylpolysiloxane become silica when calcined at a high temperature, a mechanochemical method is preferable when coating them. The composition ratio of (1), (2) and titanium dioxide is (1) 1 to 5% by weight, and (2) is 3% in total.
0 to 40% by weight, and 55 to 69% by weight of titanium dioxide. Further, a preferable configuration of (2) is a ratio of weight of silicic anhydride: total amount of methylsiloxane network polymer and / or cross-linked methylpolysiloxane = 3: 1 to 1: 1 in the component of (2). It is composed of Further, in this case, from the viewpoint of the degree of organicity, it is preferable to constitute only the methylsiloxane network polymer. The titanium dioxide used as the base powder may be of rutile type or anatase type, but the average particle size of the final product is on the order of submicrons.
That is, 0.01 to 10 μm, more preferably 0.05 to 3
It is particularly preferable that the particle diameter is about μm. Such a powder can be produced and used as described below, or a commercially available powder can be used.
Commercially available products include, for example, “Ti
O2-SMS "can be suitably exemplified. In the external preparation for skin of the present invention, the coated titanium dioxide of the present invention may contain only one kind or two or more kinds in combination. In the skin external preparation of the present invention,
The preferred content of the coated titanium dioxide of the present invention is 1 to 3
0% by weight, and more preferably 3 to 20% by weight. If this is too small, it may not work,
This is because if the amount is too large, the whiteness may prevail and the degree of freedom in toning may be lost.

(Production Example 1) 65 parts by weight of fine particle titanium dioxide (average particle size: 5 μm), 1 part by weight of aluminum oxide, and 34 parts by weight of anhydrous silicic acid were charged into a planetary ball mill, and coated for 48 hours to give an average particle size of 6. 1 μm of the coated titanium dioxide 1 of the invention was obtained.

(Production Example 2) 55 parts by weight of fine-particle titanium dioxide (average particle size: 5 μm), 2 parts by weight of aluminum oxide, 34 parts by weight of anhydrous silicic acid, and 8 parts by weight of cross-linked methylpolysiloxane (Trefil manufactured by Toray Co., Ltd.) Charged in a ball mill, coated for 48 hours, average particle size 4.3 μm
Of the present invention was obtained.

(Production Example 3) 60 parts by weight of fine titanium dioxide (average particle size: 5 μm), 2 parts by weight of aluminum oxide, 34 parts by weight of silicic anhydride, and 4 parts by weight of a methylsiloxane network polymer were charged into a planetary ball mill and coated for 48 hours. Treated, coated titanium dioxide 3 of the present invention having an average particle size of 5.2 μm
I got

(Production Example 4) A planetary ball mill was charged with 65 parts by weight of fine particle titanium dioxide (average particle size: 5 μm), 1 part by weight of aluminum oxide, and 34 parts by weight of a methylsiloxane network polymer. 3.9μ diameter
m of the coated titanium dioxide 4 of the present invention was obtained.

(2) Water-repellent powder which is an essential component of the skin external preparation of the present invention The skin external preparation of the present invention is characterized by containing a water-repellent powder. As the water-repellent treatment, any treatment that is usually used for powders for cosmetics can be used without any particular limitation. For example, a silicone such as dimethylpolysiloxane or hydrogenmethylpolysiloxane is baked. Treatment, alkylation with a silane coupling agent such as methyltrimethoxysilane, 3,3,3-
Perfluoroalkyl treatment with trifluoropropyltrimethoxysilane or perfluoroalkylethyl phosphoric acid diethanolamine salt, acylated amino acid treatment using an acylated glutamate and the like can be preferably exemplified, among which perfluoroalkyl treatment from the contribution to the effect, Among them, a coating treatment with a perfluoroalkylethyl phosphoric acid diethanolamine salt is particularly preferred. The amount of the surface treatment agent used for the surface treatment is 1 to 10 based on the powder.
% By weight is preferred. Further, such a treatment is preferably performed on a colored powder, and preferred examples of the colored powder include red iron oxide, yellow iron oxide, iron black, navy blue, and ultramarine blue. Such a surface-treated powder may be used after being processed according to a conventional method, or a commercially available powder may be used. Preferred among commercially available ones are perfluoroalkylethyl phosphate diethanolamine salt-coated powders, PF Bengala, PF Gunjo (manufactured by Daito Kasei Co., Ltd.) and perfluoroalkylsilane-coated powders, PFI Mica M102, PFI titanium mica SPM70 (manufactured by Miyoshi Kasei Co., Ltd.) can be preferably exemplified. In particular, it has been pointed out that in the toning system using ultramarine blue, the makeup collapse has been markedly reduced. Therefore, when ultramarine blue is used, it is particularly preferable to perform perfluoroalkyl treatment. Since mica or titanium mica also easily becomes a reservoir for oils and fats, it is preferable that these are also perfluoroalkyl-treated. The preferred content of these water-repellent powders is
0.1 to 10% by weight.

(3) External preparation for skin of the present invention The external preparation for skin of the present invention is characterized by containing the above essential components. By adopting the above configuration, the external preparation for skin of the present invention exhibits an effect that the perceived change in color after application is small and makeup collapse is significantly suppressed.
Such properties are particularly suitable for make-up cosmetics among skin external preparations.For example, in skin external preparations containing titanium dioxide for the purpose of preventing phototoxicity of anti-inflammatory agents such as indomethacin, Since the same effect is exerted even on a skin color tone to make the later whiteness inconspicuous, such an application also belongs to the technical scope of the present invention. Particularly preferred applications are make-up cosmetics, especially oil gel make-up cosmetics, powder make-up cosmetics and intermediate make-up cosmetics having a powder content of 60% by weight or more.

The external preparation for skin of the present invention may contain, in addition to the above essential components, optional components which are usually used in external preparations for skin. Examples of such optional components include esters such as carnauba wax and octyldodecyl oleate, silicones such as dimethicone, femethicone, and amomedicone; triglycerides such as olive oil, tallow, and coconut oil; stearic acid, oleic acid, and ritinoleic acid. Fatty acids, higher alcohols such as oleyl alcohol, stearyl alcohol and octyl dodecanol, polyhydric alcohols such as polyethylene glycol, glycerin, 1,3-butanediol, isoprene glycol and 1,2-pentanediol, thickening and gelling Agents, antioxidants, ultraviolet absorbers, coloring agents, preservatives, powders, active ingredients, and the like. In the external preparation for skin of the present invention, particularly preferred optional components include silicones, and among them, high-viscosity methylphenylpolysiloxane having a viscosity of 10,000 centistokes or more is particularly preferable. The preferred content of such a high viscosity methylphenylpolysiloxane is 0.1 to 5% by weight, and within this range, it exerts the action of adhering the powders to the skin without stickiness and the whole system. This is because the sebum-removability can be improved. The external preparation for skin of the present invention can be produced by treating the above essential components and optional components according to a conventional method.

[0014]

EXAMPLES 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 only to such Examples.

<Examples 1 to 5> A foundation was prepared according to the following recipe. That is, after mixing the components of A with a Henschel mixer, pulverizing with a pulverizer equipped with a 0.9 mm round hole screen, spraying and coating while mixing with a Henschel mixer,
The powder was pulverized with a pulverizer equipped with a 1 mm herringbone screen, packed in a metal plate, and pressed to obtain a foundation, which is a skin external preparation of the present invention. A PF Bengala 0.4 parts by weight PF Gunjo 0.3 parts by weight PFI mica M102 20 parts by weight PFI titanium mica SPM70 15 parts by weight Titanium dioxide 10 parts by weight Coated titanium dioxide * 15 parts by weight Silica-titanium sericite-silica layered powder 26 parts by weight rhodimethicone (20 centistokes) 11.3 parts by weight methylphenylpolysiloxane 2 parts by weight (50,000 centistokes) * Table 1 shows details.

[0016]

[Table 1]

<Example 6> Regarding the foundations of Examples 1 to 5, the coated titanium dioxide 1 of Example 1 was replaced with ordinary titanium dioxide, and the PF of Example 1 and PF of Example 1 were replaced.
Bengala, PF Gunjo, PFI Mica M102, P
Comparative Example 2 in which FI titanium mica SPM70 was all replaced with ordinary bengala, ultramarine, mica, and titanium mica. Coated titanium dioxide 1 of Example 1 and PF bengala, PF Gunjo, PFI mica M102, and PFI titanium mica SPM
A makeup collapse experiment was conducted with Control Example 1 in which No. 70 was replaced with ordinary titanium dioxide, red iron oxide, ultramarine, mica, and titanium mica. That is, the sample of the control example 1 was applied to the right half face and the sample was applied to the left half face using a panel of 10 persons per group. The condition of makeup was evaluated by an expert according to the following criteria. That is, as compared with Comparative Example 1, ++: not significantly degraded, +: clearly degraded, ±: slightly degraded,-: degraded to the same degree or more. At the same time, the color was measured at two points, the upper cheek and the lower cheek, and the change in color tone (ΔE) over 4 hours was also measured, and the group average was determined. These are shown in Table 2. This indicates that the foundation, which is an external preparation for skin of the present invention, is excellent in keeping makeup. Furthermore, comparison with Comparative Examples 1 and 2 shows that such an effect is a combination effect of the coated titanium dioxide and the water-repellent powder.

[0018]

[Table 2]

Example 7 A foundation was prepared according to the following recipe. That is, after mixing the component (a) with a Henschel mixer, the mixture was pulverized with a pulverizer equipped with a 0.9 mm round hole screen, and sprayed and coated while mixing with a Henschel mixer to obtain 1 mm
The mixture was pulverized with a pulverizer equipped with a herringbone screen, packed in a gold plate, and pressed to obtain a foundation, which is a skin external preparation of the present invention. This is described in Example 1
The makeup lasts a little bit less than the foundation,
It had sufficiently good long-lasting properties. This indicates that the skin external preparation of the present invention is preferably subjected to perfluoroalkyl treatment as a water-repellent powder. (A) Silicone baked bengara 0.4 parts by weight Silicone baked gunjo 0.3 parts by weight Silicone baked mica M102 20 parts by weight Silicone baked titanium mica SPM70 15 parts by weight Titanium dioxide 10 parts by weight Coated titanium dioxide 1 15 parts by weight Silica-titanium sericite Silica layered powder 26 parts by weight Lo dimethicone (20 centistokes) 11.3 parts by weight Methylphenyl polysiloxane 2 parts by weight (50,000 centistokes)

Example 8 A skin external medicine was prepared according to the following formulation. That is, the ingredients were kneaded well and filled into a tube to obtain an anti-inflammatory agent for external use on the skin. It was inconspicuous when coated, and phototoxicity was hardly observed. "TiO2-SMS" 1 part by weight Bengala coated with zinc stearate 0.1 part by weight Indomethacin 1 part by weight Vaseline 97.9 parts by weight

[0021]

According to the present invention, it is possible to provide means for suppressing makeup collapse which could not be solved only by the conventional silicone-treated powder or perfluoro-treated powder.

Claims (6)

[Claims] 1. 1) Titanium dioxide coated with (1) aluminum oxide and (2) one or more selected from silicic anhydride, a methylsiloxane network polymer and a crosslinked methylpolysiloxane; An external preparation for skin, comprising a water-repellent powder. 2. A titanium dioxide coated with (1) aluminum oxide and (2) one or more selected from silicic anhydride, a methylsiloxane network polymer and a crosslinked methylpolysiloxane. The external preparation for skin according to claim 1, wherein the average particle size of the external preparation is 0.01 to 10 µm. 3. The external preparation for skin according to claim 1, wherein the water-repellent treatment in the water-repellent treated powder is a perfluoroalkylation treatment. 4. The external preparation for skin according to claim 3, wherein the perfluoroalkylation treatment is a coating treatment with perfluoroalkylethyl phosphate diethanolamine salt and / or perfluoroalkylsilane. 5. The external preparation for skin according to claim 1, which is a cosmetic. 6. The external preparation for skin according to claim 5, which is for make-up.