JP3020716B2 - Powder-containing water-in-oil emulsion cosmetic - Google Patents

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 which is excellent in use characteristics (growth) and storage stability. More specifically, it relates to a powder-containing water-in-oil type emulsified cosmetic suitable as a makeup cosmetic or a sunscreen cosmetic.

[0002]

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

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

[0004]

According to the present invention, one or more cyclic silicone tetramer to hexamer are 5 to 20% by weight, the HLB value is 10 or less and the liquid sorbitan fatty acid ester is 0.1% or less. 1-2% by weight, the following general formula

Embedded image (Wherein, m is 300 to 500, n is 1 to 7, a is 20 to
0.1 and 2% by weight of a polyether-modified silicone represented by the following formula (1), 0.01 to 0.1% by weight of a cationic surfactant, and 0.1 to 0.1% by weight of a rutile type titanium oxide. It is a powder-containing water-in-oil type emulsified cosmetic containing 5 to 20% by weight and 30 to 70% by weight of water.

Hereinafter, the configuration of the present invention will be described. The cyclic silicone tetramer to hexamer used in the present invention is represented by the following general formula, and one or more of these are used in combination.

Embedded image (In the formula, n is an integer of 4 to 6) The content is defined as 100% by weight (hereinafter abbreviated as wt%) of the whole emulsified cosmetic.
The content is 5 to 20% by weight, preferably 8 to 15% by weight. If it is less than 5 wt%, it is difficult to obtain an excellent feeling in use, and 2
If it exceeds 0 wt%, a problem that the oil phase, which is a continuous phase, separates into the upper layer occurs, which is not preferable.

[0006] The sorbitan fatty acid ester used in the present invention has an HLB value of 10 or less and is in a liquid state, and its content is 0.1 to 2 wt%, preferably 0.1 to 2 wt%.
3 to 1.5 wt%. If the HLB value exceeds 10, a water-in-oil emulsion composition cannot be prepared, and even if the HLB value is 10 or less, storage stability is poor in a solid state. On the other hand, if the content is less than 0.1 wt%, the dispersibility of the powder is deteriorated, and the storage stability is poor. If the content exceeds 2 wt%, the weight is increased, giving an unpleasant feel.

The polyether-modified silicone used in the present invention is represented by the above-mentioned general formula [Chemical Formula 2], and its content is 0.1 to 2% by weight, preferably 0.3 to 2% by weight.
1.5 wt%. If it is less than 0.1 wt%, the storage stability is inferior, and if it exceeds 2 wt%, a sticky feeling or the like occurs.

The cationic surfactant used in the present invention is generally used as a hair rinse agent and a bactericide, such as an alkyltrimethylammonium salt, a dialkyldimethylammonium salt, an alkyldimethylbenzylammonium salt, and an alkylpyridinium salt. And preferably distearyldimethylammonium chloride and stearyldimethylbenzylammonium chloride, and the content thereof is 0.01 to 0.1 wt%. The storage stability is extremely improved by adding a cationic surfactant as compared with the case where the emulsion is emulsified only with the sorbitan fatty acid ester and the polyether-modified silicone.

The rutile type titanium oxide used in the present invention is generally used for cosmetics, paints and the like, and is preferably one which has been treated with alumina, silica or zinc white. For example, as a rutile-type titanium oxide, Taipaque R-
820 (manufactured by Ishihara Sangyo Co., Ltd.), titanium oxide JR-701
[Manufactured by Teica Co., Ltd.]. Here, the reason why the titanium oxide is specified to be rutile in the present invention is that a water-in-oil emulsion composition containing rutile titanium oxide is more excellent in storage stability than anatase titanium oxide as described below. It is based on the finding that The content of the rutile type titanium oxide is 0.5 to 20% by weight, preferably 3 to 15% by weight. If the amount is less than 0.5% by weight, the purpose of makeup cosmetics and sunscreen cosmetics cannot be achieved, and if it exceeds 20% by weight, storage stability deteriorates.

[0010] Purified water or the like is used as the water used in the present invention, and its content is 30 to 70 wt%.

The emulsified cosmetic of the present invention may contain, in addition to the above essential components, powder pigments, oily components, humectants, emulsifiers, fragrances, ultraviolet absorbers, preservatives, and the like, if necessary.

[0012]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
In addition, the numerical value in a table | surface represents content (wt%). Prior to the examples, an evaluation method adopted in each example will be described.

(1) Test method for storage stability The powder-containing water-in-oil emulsified cosmetic prepared by a predetermined method is
After standing in a thermostat at 25 ° C., 25 ° C., and 45 ° C., the storage stability after 3 weeks was evaluated according to the following evaluation criteria. No separation and aggregation; ○ Slight separation and aggregation; △ Separation and aggregation; ×

(2) Test Method for Evaluation of Usage Characteristics Using 20 female panel members, the usage characteristics for growth were evaluated according to the following evaluation criteria. 15 or more answered good; ○ 7-14; 以下 6 or less; ×

(3) Preparation Method The oil phase component is heated to 70 ° C., and the powder is dispersed therein.
An aqueous phase component previously heated to 70 ° C. is added, and after emulsification, the mixture is stirred and cooled to room temperature to obtain a desired emulsified cosmetic.

Examples 1 to 3 and Comparative Examples 1 to 3 Table 1 shows the component compositions and test results of the emulsified foundation.

[Table 1]

(4) Characteristics Examples 1 to 3 of the present invention are clearly superior in all aspects of storage stability and use characteristics. As shown in Comparative Examples 1 and 2, when no cationic surfactant such as distearyldimethylammonium chloride or stearyldimethylbenzylammonium chloride is contained, or when substituted with sodium cetyl sulfate, storage stability and use characteristics are poor. You can see that. Even when anatase-type titanium oxide is used as in Comparative Example 3, no satisfactory product can be obtained.

[0018]

As described above, according to the present invention, the characteristics of use (grow)
It is clear that the present invention provides a powder-containing water-in-oil emulsion cosmetic composition having excellent storage stability.

Claims (1)

(57) [Claims] 1. One or two or more cyclic silicone tetramer to hexamer having a HLB value of 10 to 5% by weight and a liquid sorbitan fatty acid ester of 0.1 to 2%.
% By weight, the following general formula: (Wherein, m is 300 to 500, n is 1 to 7, a is 20 to
0.1 and 2% by weight of a polyether-modified silicone represented by the following formula (1), 0.01 to 0.1% by weight of a cationic surfactant, and 0.1 to 0.1% by weight of a rutile type titanium oxide. A powder-containing water-in-oil emulsion cosmetic comprising 5 to 20% by weight and 30 to 70% by weight of water.