JPH05148121A - Powder-containing water-in-oil emulsified cosmetic - Google Patents

Abstract

PURPOSE:To provide the subject cosmetic excellent in application characteristics (spreadability) and preservability, suitable as a makeup cosmetic or anti-suntan cosmetic. CONSTITUTION:The objective cosmetic has the above-mentioned advantages essentially comprising (A) 10-35 (pref. 15-30)wt.% of at least one kind of cyclic silicone tetramer to cyclic silicone hexamer, (B) 0.5-3 (pref. 0.7-1.5)wt.% of sorbitan monoisostearate and/or diglyceryl monoisostearate, (C) 0.5-3 (pref. 0.7-1.5)wt.% of a polyether-modified silicone of the formula ((m) is 300-500; (n) is 1-7; (a) is 20-30; (b) is 20-30), (D) 0.5-20 (pref. 3-15wt.%) of rutile-type titanium dioxide, pref. treated with alumina, silica or zinc oxide, and (E) 30-70wt.% of water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder-containing water-in-oil type emulsified cosmetic having excellent use characteristics (spreading) and storage stability. More specifically, it is suitable as a makeup cosmetic and a sunscreen cosmetic. The present invention relates to a powder-containing water-in-oil emulsion cosmetic.

[0002]

2. Description of the Related Art Conventionally, water-in-oil type emulsion cosmetics containing a volatile cyclic silicone have a drawback that they are heavy in use characteristics.
Further, when a hydrophilic powder such as titanium oxide is contained, sedimentation or the like occurs and it is difficult to obtain a satisfactory storage stability.

Therefore, an object of the present invention is to provide a powder-containing water-in-oil type emulsified cosmetic excellent in use characteristics (spreading) and storage stability.

[0004]

According to the present invention, which achieves the above object, 10 to 35% by weight of one or two or more cyclic silicone tetramer to hexamer, sorbitan monoisostearate and / or monoisostearic acid are used. 0.5 to 3% by weight of diglyceryl, the following general formula

[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), 0.5 to 3% by weight of polyether-modified silicone, 0.5 to 20% by weight of rutile type titanium oxide, and 30 to 70% of water.
It is a powder-containing water-in-oil type emulsified cosmetic material containing wt%.

The structure of the present invention will be described below. The cyclic silicone 4-hexamer used in the present invention is represented by the following general formula, and one or a combination of two or more of these is used.

[Chemical 3] (In the formula, n is an integer of 4 to 6) and the content thereof is 10 to 35 wt%, preferably 15 wt%, based on 100% by weight of the entire emulsified cosmetic (hereinafter abbreviated as wt%).
~ 30 wt%. That is, if it is less than 10 wt%, it is difficult to obtain an excellent feeling in use, while if it exceeds 35 wt%, there is a problem that the oil phase which is the continuous phase is separated into the upper layer portion, which is not preferable.

The content of sorbitan monoisostearate and / or diglyceryl monoisostearate used in the present invention is 0.5 to 3 wt%, preferably 0.7 to
It is 1.5 wt%. That is, if it is less than 0.5 wt%, the dispersibility of the powder is poor and the storage stability is poor.
This is because if it exceeds wt%, the weight of the film spreads and the like and an unfavorable feeling is given.

The polyether-modified silicone used in the present invention is represented by the above general formula 2, and its content is 0.5 to 3 wt%, preferably 0.
It is 7 to 1.5 wt%. If it is less than 0.5, it is difficult to emulsify and the storage stability is poor. On the other hand, if it exceeds 3 wt%, a sticky feeling or the like occurs, which is not preferable.

And sorbitan monoisostearate and / or diglyceryl monoisostearate,
The mixing ratio with the polyether-modified silicone is preferably 1: 0.5 to 1: 2. That is, when it is attempted to emulsify only with sorbitan monoisostearate and / or diglyceryl monoisostearate, it is necessary to contain an emulsifier in an amount of 3 wt% or more in order to obtain satisfactory storage stability. Will occur.
Further, there is a drawback that the powder cannot be stably dispersed only with the polyether-modified silicone. Therefore, in order to obtain a powder-containing water-in-oil type emulsified cosmetic having a light spread and excellent storage stability, it is necessary to combine the emulsifiers.

The rutile type titanium oxide used in the present invention is usually used in cosmetics, paints, etc., and preferably treated with alumina, silica and zinc white. For example, as rutile titanium oxide, Taipaque R-820 [manufactured by Ishihara Sangyo Co., Ltd.], titanium oxide JR-
701 [manufactured by Teika Co., Ltd.] and the like. The reason why the titanium oxide is specified as the rutile type in the present invention is that the water-in-oil emulsion composition containing the rutile type titanium oxide is more excellent in storage stability than the anatase type titanium oxide as described below. It is based on knowledge. And
The content of this rutile type titanium oxide is 0.5 to 20 wt%
And preferably 3 to 15 wt%. That is, if this content is less than 0.5 wt%, the purpose as a makeup cosmetic and a sunscreen cosmetic cannot be achieved, while 2
This is because if it exceeds 0 wt%, the storage stability becomes poor.

Purified water or the like is used as the water used in the present invention, and the content thereof is 30 to 70 wt%.

In addition to the above essential components, the emulsified cosmetic composition of the present invention may contain powder pigments, oily components, moisturizers, emulsifiers, fragrances, ultraviolet absorbers, preservatives and the like as required.

[0012]

The present invention will now be described in more detail by way of examples, which should not be construed as limiting the invention.
The numerical values in the table represent the content (wt%). Prior to the examples, the evaluation method adopted in each example will be described.

(1) Storage stability evaluation test method A powder-containing water-in-oil type emulsion cosmetic prepared by a predetermined method was used.
The sample was left in a constant temperature bath at 25 ° C, 25 ° C and 45 ° C, and the storage stability after 3 weeks was evaluated according to the following evaluation criteria. No separation / aggregation; ○ Slight separation / aggregation; △ Separation / aggregation; ×

(2) Test Method for Evaluation of Use Characteristics The use characteristics of Nobi were evaluated by 20 female panelists according to the following evaluation criteria. The number of people who answered good is 15 or more; ○ 〃 7 to 14; △ 〃 6 or less; ×

Preparation Method The oil phase component is heated to 70 ° C. to disperse the powder, and the water phase component which has been heated to 70 ° C. in advance is added. Get paid.

Examples 1 to 4 and Comparative Examples 1 to 4 Table 1 shows the component composition of the emulsion foundation and the test results.

[Table 1]

Characteristic As shown in FIG. 1, Examples 1 to 4 of the present invention are Comparative Examples 1 to 4 in all points of storage stability and use characteristics.
Obviously better than the ones. On the other hand, if either diglyceryl monoisostearate or polyether-modified silicone is used alone, or if sorbitan monoisostearate and polyether-modified silicone are used in combination, the storage stability is less than 0.5 wt% It can be seen that it is inferior in performance and usage characteristics. (Comparative Examples 1 to 3)
Further, it can be seen that even when anatase type titanium oxide is used, no satisfactory one can be obtained. (Comparative example 4)

[0018]

As described above, it is apparent that the present invention provides a powder-containing water-in-oil type emulsion cosmetic having extremely excellent use characteristics (spreading) and storage stability.

Claims (1)

[Claims] 1. A cyclic silicone tetramer to hexamer, one or more kinds of which is 10 to 35% by weight, sorbitan monoisostearate and / or diglyceryl monoisostearate of 0.5 to 3% by weight, represented by the following general formula: [Chemical 1] (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), 0.5 to 3% by weight of polyether-modified silicone, 0.5 to 20% by weight of rutile type titanium oxide, and 30 to 70% of water.
A powder-containing water-in-oil type emulsified cosmetic characterized in that it is contained in an amount of 10% by weight.