JPH05201827A - Powder-containing water-in-oil type emulsion cosmetic - Google Patents

Abstract

PURPOSE:To obtain a powder-containing water-in-oil type emulsion cosmetic suitable as make-up cosmetic or anti-suntan cosmetic, having excellent characteristics (slip) of use and storage stability. CONSTITUTION:An emulsion cosmetic comprising (A) 5-20wt.% one or more cyclic silicone tetramer to hexamer, (B) 0.1-2wt.% liquid sorbitan fatty acid ester having <=10 HLB value, (C) 0.1-2wt.% polyether modified silicone of the formula (m is 300-500; n is 1-7; a and b are 20-30), (D) 0.01-0.1wt.% cationic surfactant, preferably distearyldimethylammonium chloride or stearyldimethylbenzylammonium chloride, (E) 0.5-20wt.% rutile type titanium oxide preferably treated with alumina, silica or zinc flower and (F) 30-70wt.% water. The preferable blending ratio of the components is 8-15wt.% component A, 0.3-1.5wt.% component B, 0.3-1.5wt.% component C and 3-15wt.% component E.

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 composition having excellent use characteristics (spreading) and storage stability. More specifically, it relates to a powder-containing water-in-oil emulsion cosmetic suitable as a makeup cosmetic and a sunscreen 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. Furthermore, when a hydrophilic powder such as titanium oxide is contained, it is difficult to obtain a satisfactory storage stability because sedimentation occurs.

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

[0004]

The present invention provides a liquid sorbitan fatty acid ester having a HLB value of 10 or less and 5 to 20% by weight of one or two or more cyclic silicone tetramer to hexamer. 1-2% by weight, 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), 0.1 to 2% by weight of a polyether-modified silicone, 0.01 to 0.1% by weight of a cationic surfactant, and 0. The powder-containing water-in-oil type emulsion cosmetic is characterized by containing 5 to 20% by weight and 30 to 70% by weight of water.

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) The content is 100% by weight (hereinafter abbreviated as wt%) of the entire emulsified cosmetic,
It is 5 to 20 wt%, preferably 8 to 15 wt%. If it is less than 5% by weight, it is difficult to obtain an excellent feeling of use.
When it exceeds 0 wt%, there is a problem that the continuous oil phase is separated into the upper layer portion, which is not preferable.

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.
It is 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, the storage stability is poor in the solid state. On the other hand, if the content is less than 0.1 wt%, the dispersibility of the powder will be poor and the storage stability will be poor.

The polyether-modified silicone used in the present invention is represented by the above general formula [Chemical formula 2], and the content thereof is 0.1 to 2 wt%, preferably 0.3 to
It is 1.5 wt%. If it is less than 0.1 wt%, the storage stability is poor, 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, and examples thereof include alkyl trimethyl ammonium salt, dialkyl dimethyl ammonium salt, alkyl dimethyl benzyl ammonium salt, alkyl pyridinium salt and the like. And is preferably distearyldimethylammonium chloride or stearyldimethylbenzylammonium chloride, and the content thereof is 0.01 to 0.1 wt%. As compared with the case of emulsifying only the sorbitan fatty acid ester and the polyether modified silicone, the addition of the cationic surfactant improves the storage stability.

The rutile type titanium oxide used in the present invention is generally used in cosmetics, paints and the like, and preferably treated with alumina, silica and zinc white. For example, as rutile type titanium oxide, Taipaque R-
820 [Ishihara Sangyo Co., Ltd.], titanium oxide JR-701
[Taika 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 the knowledge that The content of rutile type titanium oxide is 0.5 to 20 wt%, preferably 3 to 15 wt%. If it is less than 0.5 wt%, the purpose of makeup cosmetics and sunscreen cosmetics cannot be achieved, and if it exceeds 20 wt%, the storage stability becomes poor.

The water used in the present invention is purified water or the like, 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, UV absorbers, preservatives and the like, if necessary.

[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 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 Using 20 female panel members, the use characteristics of Nobi were evaluated according to the following evaluation criteria. The number of people who answered good is 15 or more; ○ 7 to 14; △ 6 or less; ×

(3) Preparation method The oil phase component is heated to 70 ° C. and the powder is dispersed therein.
The aqueous phase component heated in advance to 70 ° C. is added, and after emulsification, the mixture is stirred and cooled to room temperature to obtain the target emulsified cosmetic.

Examples 1 to 3 and Comparative Examples 1 to 3 Table 1 shows the composition and test results of the emulsion foundations.

[Table 1]

(4) Characteristics Examples 1 to 3 of the present invention are obviously excellent in all aspects of storage stability and use characteristics. As shown in Comparative Examples 1 and 2, storage stability and use characteristics are poor when a cationic surfactant such as distearyldimethylammonium chloride or stearyldimethylbenzylammonium chloride is not contained or when it is replaced with sodium cetyl sulfate or the like. I understand. Even when anatase-type titanium oxide is used as in Comparative Example 3, satisfactory results cannot be obtained.

[0018]

As described above, the present invention is characterized by its use characteristics (spreading).
And, it is clear to provide a powder-containing water-in-oil type emulsion cosmetic excellent in storage stability.

Claims (1)

[Claims] 1. A liquid sorbitan fatty acid ester having an HLB value of 10 or less in an amount of 5 to 20% by weight of one or two or more of cyclic silicone tetramers to hexamers and 0.1 to 2 of a liquid sorbitan fatty acid ester.
% By weight, the following 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% by weight of a polyether-modified silicone, 0.01 to 0.1% by weight of a cationic surfactant, and 0. A powder-containing water-in-oil type emulsion cosmetic, characterized by containing 5 to 20% by weight and 30 to 70% by weight of water.