JPH06100413A - Water-in-oil type emulsion cosmetic containing ethanol and powder - Google Patents

Abstract

PURPOSE:To provide the subject cosmetic composed of a water-in-oil type emul sion containing ethanol and a powder and suitable for a make-up cosmetic excellent in dispersion properties and a sun-screening cosmetic. CONSTITUTION:This cosmetic contains (A) 10 to 30wt.% one or more kinds of oligomers selected from tetramer to hexamer of a cyclic silicone of formula I [(n) is 4 to 6], (B) 0.2 to 2.5wt.% sorbitan monoisostearate and/or diglycerin monoisostearate, (C) 0.1 to 2.5wt.% polyether-modified silicone of formula II [(m) is 300 to 500; (n) is 1 to 7; (a) and (b) are each 20 to 30], (D) 3 to 20wt.% ethanol, (E) 0.5 to 20wt.% titanium oxide, preferably rutile type titanium oxide and (F) 30 to 70wt.% water. The mixing ratio of the component (B) to the component (C) is preferably (1:0.2) to (0.5:1) and the preferable content of each component is (A)=12 to 25wt.%, (B)=0.5 to 2wt.%, (C)=2.2 to 2wt.%, (D)=5 to 15wt.% and (E)=3 to 15wt.%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a makeup cosmetic having excellent dispersibility, and a water-in-oil emulsion cosmetic containing ethanol and powder, which is suitable as a sunscreen cosmetic.

[0002]

2. Description of the Related Art Conventionally, water-in-oil emulsion cosmetics containing ethanol and powder and containing a volatile cyclic silicone as an oil phase component have been used in summer cosmetics because of their refreshing feeling and resistance to collapse of cosmetics. It was very popular as a fee. Since these contain ethanol, separation of an oil phase and an aqueous phase and sedimentation of powder have occurred, and they are cosmetics in a form to be used after shaking and redispersing the container.

However, they have the drawbacks that they are not completely dispersed even when shaken, or that separation and sedimentation occur within a few hours after redispersion.

[0004]

Accordingly, an object of the present invention is to provide a water-in-oil type emulsion cosmetic containing ethanol and powder, which is excellent in dispersibility.

[0005]

[Means for Solving the Problems] The above-mentioned object is to provide 10 to 30 of one or two or more of cyclic silicone 4- to 6-mers.
% By weight, sorbitan monoisostearate and / or diglyceryl monoisostearate at 0.2 to 2.5% by weight, and polyether-modified silicone represented by the following general formula 2 at 0.1 to 2.5% by weight, 3-20% by weight of ethanol, 0.5-20% by weight of titanium oxide and 30-% of water
This is achieved by a water-in-oil type emulsion cosmetic containing ethanol and powder characterized by containing 70% by weight.

[0006]

[Chemical 2] (In the formula, m is 300 to 500, n is 1 to 7, and a is 20 to
30 and b are integers of 20 to 30. )

The structure of the present invention will be described below.

Cyclic silicones 4-6 used in the present invention
The monomer is represented by the following general formula, and one or more of these are used.

[0009]

[Chemical 3] (In the formula, n is an integer of 4 to 6.)

The content of the emulsified cosmetic as a whole is 100% by weight (hereinafter abbreviated as "wt%") and is 10 to 30w.
t%, preferably 12 to 25 wt%. 10
If less than wt%, it is difficult to obtain an excellent feeling of use, and 30 wt
If it exceeds%, the viscosity is lowered and the separation is accelerated, which is not preferable.

The content of sorbitan monoisostearate and / or diglyceryl monoisostearate used in the present invention is 0.2 to 2.5 wt%, preferably 0.5 to 2 wt%. If it is less than 0.2 wt%, it is not sufficient for emulsification, and if it exceeds 2.5 wt%, the elongation becomes heavy, which is not preferable.

The polyether-modified silicone used in the present invention is represented by the above general formula 2, and the content thereof is 0.1 to 2.5 wt%, preferably 0.2 to.
It is 2 wt%. If it is less than 0.1 wt%, it is not sufficient for emulsification, and if it exceeds 2.5 wt%, a sticky feeling is produced, which is not preferable.

Further, the blending ratio of the sorbitan monoisostearate and / or diglyceryl monoisostearate and the polyether-modified silicone is preferably 1 :.
It is 0.2 to 0.5: 1. The former is 1 and the latter is 0.
If it is less than 2, it is difficult to obtain satisfactory dispersibility in this system containing alcohol. In addition, the former is 0.
If it is less than 5, it is difficult to stably disperse the powder.

The content of ethanol used in the present invention is 3 to 20 wt%, preferably 5 to 15 wt%. If it is less than 3 wt%, it is not enough to obtain a refreshing feeling, and 20w
This is because if it exceeds t%, unfavorable effects such as skin irritation may be considered.

The titanium oxide used in the present invention is generally used in cosmetics, paints, etc., and is preferably rutile type titanium oxide. This is because the water-in-oil emulsion composition containing rutile-type titanium oxide is more excellent in the dispersibility of the present invention than the anatase-type titanium oxide.

The content of titanium oxide is 0.5 to 20 wt.
%, And preferably 3 to 15 wt%. 0.5w
If it is less than t%, the purpose as a makeup cosmetic and a sunscreen cosmetic cannot be achieved, and if it exceeds 20 wt%, the dispersibility becomes poor.

The water used in the present invention includes purified water and the like, and the content thereof is 30 to 70 wt%.

In the emulsified cosmetic composition of the present invention, in addition to the above-mentioned essential components, powder pigments, oily components, moisturizers, emulsifiers, fragrances, ultraviolet absorbers, preservatives and the like can be added, if necessary.

[0019]

EXAMPLES Next, the present invention will be described in more detail by way of examples, but prior to that, the evaluation methods used in the examples will be described. The present invention is not limited to these. The numerical values in the table represent the content (wt%).

(Dispersion Evaluation Test Method) Ethanol and powder-containing water-in-oil type emulsified cosmetics prepared by a predetermined method were shaken sufficiently and then left in a thermostat at 25 ° C. to dispersibility after 5 days. It evaluated according to the following evaluation criteria.

[0021]

[Table 1]

Examples 1 to 3 and Comparative Examples 1 to 2 Emulsified foundations having the compositions shown in Table 2 were prepared by the following method, and the results of the above tests are shown in Table 2 together.

(Preparation Method) After the powder was dispersed in the oil phase component, the aqueous phase component was added and stirred, and finally ethanol was added and stirred to obtain the intended emulsified cosmetic. The addition of the water phase component to the oil phase component was performed at any temperature of 20 to 90 ° C.

[0024]

[Table 2]

Examples 1 to 3 which are emulsified cosmetics of the present invention
Was clearly superior in dispersibility to those of Comparative Examples 1-2. Further, as shown in Comparative Examples 1 and 2, it is found that the dispersibility is poor when only sorbitan monoisostearate and / or diglyceryl monoisostearate or only polyether-modified silicone is used.

[0026]

As described above, it is obvious that the present invention provides a water-in-oil type emulsion cosmetic containing ethanol and powder having excellent dispersibility.

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Claims (1)

[Claims] 1. A cyclic silicone tetramer to hexamer is one or two or more in an amount of 10 to 30% by weight, sorbitan monoisostearate and / or diglyceryl monoisostearate in an amount of 0.2 to 2.5% by weight. General formula: (In the formula, m is 300 to 500, n is 1 to 7, and a is 20 to
30 and b are integers of 20 to 30. ) 0.1 to 2.5% by weight of polyether-modified silicone, 3 to 20% by weight of ethanol, 0.5 to 20% by weight of titanium oxide, and 30 to 70% by weight of water. A water-in-oil type emulsion cosmetic containing ethanol and powder, which is a feature.