JP3406438B2 - Water-in-oil emulsion cosmetics - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-in-oil type emulsion cosmetic, and more specifically, it exhibits a good emulsified state without increasing the viscosity of the outer phase, does not change with temperature or aging, and is applied during application. The present invention relates to a water-in-oil type emulsion cosmetic that spreads well on the skin and has a fresh and good feeling in use.

[0002]

2. Description of the Related Art Conventionally, water-in-oil type emulsion cosmetics have high stability by increasing the viscosity of the outer phase (oil phase) and blending solid / semi-solid type oil components. Since the product was obtained, it had a greasy and sticky feel, and was not highly evaluated as a cosmetic. However, thereafter, as an emulsification method containing a relatively large amount of water phase and capable of significantly reducing the solid / semisolid oil content in the oil phase, JP-A-53-21393 “water-in-oil type emulsifier composition” is used. , "JP-A-61-29033," water-in-oil type emulsion composition "and the like. However, the emulsified cosmetics containing these emulsified compositions also have a high stability by increasing the viscosity of the outer phase in the same manner, and thus have poor elongation when applied to the skin,
There was a drawback that the feeling was not sufficient. For this reason,
It has been desired to develop a water-in-oil type emulsion cosmetic which has good stability even if the viscosity of the outer phase is lowered, has good elongation, and has a fresh and fresh feeling.

[0003]

The present invention has been made in view of the above-mentioned problems of the prior art, and as a result of intensive studies by the present inventors, the present invention has revealed that it is a powder having a high oil absorption and a particle size of By using a mixed powder obtained by combining different powders at a specific weight ratio and a specific oil content, and by using a metallic soap as an emulsification aid, an oil with good elongation, a fresh feel and good stability The inventors have found that a water-in-water emulsion cosmetic can be obtained and completed the present invention.

That is, according to the present invention, (A) an average particle size of 2.0
˜5.0 μm particle size distribution of 1 to 15 μm organopolysiloxane elastomer spherical powder and (B) average particle size 0.2
a mixed powder consisting of hydrophobized silica powder having a particle size of less than or equal to μm and having a weight ratio of (A) to (B) of 1: 0.1 to 1: 5; An oil phase having a weight percentage of silicone oil of not less than (D) an HLB of 7 or less;
A water-in-oil type emulsion cosmetic comprising (E) a metallic soap and (F) water.

The structure of the present invention will be described in detail below. The details of the organopolysiloxane elastomer spherical powder having an average particle size of 2.0 to 5.0 μm and a particle size distribution of 1 to 15 μm, which is the component (A) of the present invention, are described in JP-B-4-66446 and JP-A-2-243612. Publication and Japanese Patent Publication No. 4-1716
No. 2 publication, examples of commercially available products include, for example,
Examples include Trefil E-505C and Trefil E-506C (trade name, manufactured by Toray Dow Corning Silicone Co., Ltd.).

The average particle size of the component (B) is 0.2 μm.
The hydrophobized silica powder of m or less is obtained by subjecting the hydrophilic hydroxyl groups on the surface to trimethylsilylation or dimethylsilylation. Specifically, in the case of trimethylsilylated,
AEROSIL R813 (trade name of Nippon Aerosil Co., Ltd.), which is dimethylsilylated AEROS
IL R972, R974 (trade name of Nippon Aerosil Co., Ltd.) and the like can be mentioned.

The components (A) and (B) are used as a mixture, and the range thereof is such that the weight ratio of (A) to (B) is 1: 0.1 to 1: 5, and more preferably. 1: 0.1
It is 1: 3. If the mixing ratio of (A) and (B) is less than (B) 0.1 with respect to (A) 1, stability tends to be poor, and if it is 5 or more, stickiness is produced when used.

In the present invention, (C) the total oil phase component of 3
An oil phase containing 0% by weight or more of silicone oil is used, and this silicone oil is a component necessary for improving the feeling of use. Silicone oils to be blended include methylpolysiloxane, methylphenylpolysiloxane,
Examples thereof include methyl hydrogen polysiloxane, decamethyl polysiloxane, methyl polysiloxane, octamethyl cyclotetrasiloxane, dodecamethyl cyclohexasiloxane, and highly polymerized methyl polysiloxane. These silicone oils are blended in an amount of 30% by weight or more in the total oil content. If the blending amount is less than 30% by weight, a refreshing feeling in terms of usability cannot be obtained.

Among the components (C) to be blended in the present invention, oils other than silicone oil include avocado oil, camellia oil, macadamia nut oil, corn oil, evening primrose oil, mink oil, jojoba oil and rapeseed oil as animal and vegetable oils. , Natural oils and plants such as castor oil, sunflower oil, cocoa oil, coconut oil, rice bran oil, olive oil, lanolin, and squalene.
Liquid paraffin, squalane, isopropyl myristate, isopropyl palmitate, isopropyl stearate, glycerol 2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, fatty acid esters such as pentaerythritol tetra-2-ethylhexanoate, diethylene glycol monopropyl Ether, polyoxyethylene polyoxypropylene pentaerythritol ether,
Examples thereof include polar oils such as polyoxypropylene butyl ether and ethyl linoleate.

These oils are the above-mentioned mixed powder (A) +
The ratio of (B) and (C) is 1: 5 to 1:30 (weight ratio),
More preferably, it is desirable to mix in a ratio of 1: 6 to 1:20 (weight ratio). When (C) is less than 5 and more than 30 with respect to (A) + (B) 1, the emulsion stability tends to deteriorate. In the present invention, (A) +
The blending amount of (B) + (C) is preferably 4.0 to 90.0% by weight.

Examples of the emulsifier having a HLB of 7 or less as the component (D) to be incorporated in the water-in-oil type emulsion cosmetic of the present invention include sorbitan monolaurate, sorbitan monooleate, sorbitan monoisostearate and sorbitan tristea. Sorbitan fatty acid esters such as glycerol, glycerol monostearate, glycerol monooleate, glycerol fatty acid esters such as glycerol isostearate, POE (5), POE (7.5), POE (1
0) Polyoxyethylene hydrogenated castor oil such as hydrogenated castor oil and polyether-based silicone activator. The compounding amount of the component (D) is 0.01 to 5.0 of the entire system.
%, And more preferably 0.1 to 3.0% by weight. If it is less than 0.01% by weight, it is difficult to stabilize the water-in-oil type emulsion cosmetic of the present invention, and if it exceeds 5.0% by weight, a sticky feeling on use may result.

The (E) metal soap blended in the present invention is
Used as an emulsification aid, it is a metal salt of a saturated or unsaturated fatty acid, and the fatty acid has 10 to 22 carbon atoms, particularly 12 carbon atoms.
Those of -18 are preferable. Moreover, as those salts,
Examples thereof include aluminum, calcium, magnesium, zinc and the like. Among these, particularly preferred emulsification aids include aluminum stearate, aluminum myristate, aluminum diolate, zinc stearate, zinc myristate, zinc oleate, and the like. These metallic soaps are used in an amount of 0.01 to 5.0% by weight, more preferably 0.0
It is desirable to add 5 to 5.0% by weight. If it is less than 0.01% by weight, it is difficult to stabilize the water-in-oil type emulsion cosmetic of the present invention, and if it exceeds 5.0% by weight, the spread during use becomes heavy, resulting in a very high sticky feeling. .

In the water-in-oil type emulsion cosmetic of the present invention, in order to give a fresh feeling to use, the size of the emulsion particles is such that the average particle size is 1.0 to 10.0 μm and the particle size distribution is 0.
1 to 20.0 μm, preferably an average particle size of 1.0 to
It is preferable to adjust the particle size distribution to 5.0 μm and the particle size distribution to 1.0 to 15.0 μm. When the size of the emulsified particles exceeds 20 μm, it gives a very fresh feeling to use, but the stability tends to deteriorate over time, and when it is less than 0.1 μm, it is difficult to feel the freshness to the touch.

The component (F) of the present invention, water, is mixed in the system in an amount of 9.0 to 95.0% by weight.

The microstructure of the water-in-oil type emulsion cosmetic of the present invention is obtained by emulsifying particles by using ultrafine particles of hydrophobic silica powder, organopolysiloxane elastomer spherical powder, and metal soap powder as an emulsification aid. Has a stabilized structure. Then, when this emulsion is spread on the skin, the water around the emulsion particles is repelled by the powder, so that the spread on the skin is very good.

In the water-in-oil type emulsion cosmetic of the present invention, in addition to the above essential components, para-aminobenzoic acid and homomethyl-7N.
-Acetyl allantoylanilate, butyl methoxy benzoyl methane, di-para methoxycinnamic acid-mono-2-
Glyceryl ethylhexanoate, amyl salicylate, octyl cinnamate, UV absorbers such as 2,4-dihydroxybenzophenone, glycerin, 1,3-butylene glycol, polyethylene glycol, sorbitol,
Xylitol, moisturizing agents such as maltitol, methyl cellulose, gum arabic, polyvinyl alcohol, montmorillonite, thickening agents such as laponite, butylhydroxytoluene, tocopherol, antioxidants such as phytic acid,
Benzoic acid, salicylic acid, sorbic acid, paraoxybenzoic acid alkyl ester (ethylparaben, butylparaben, etc.), antibacterial preservative such as hexachlorophene, acyl sarcosinic acid (eg sodium lauroylcocin), glutathione, citric acid, malic acid, tartaric acid, lactic acid Organic acids such as Vitamin A and its derivatives, Vitamin B ₆ hydrochloride, Vitamin B ₆ tripalmitate, Vitamin B ₆ dioctanoate, Vitamin B ₂ and its derivatives, Vitamin B ₁₂ , Vitamin B ₁₅ and its derivatives, etc.
, Ascorbic acid, ascorbic acid sulfate (salt), ascorbic acid phosphate (salt), vitamin C such as ascorbic acid dipalmitate, α-tocopherol, β-tocopherol, γ-tocopherol,
Vitamin E-acetate, vitamin E-nicotinate, and other vitamins E, vitamin D, vitamin H, pantothenic acid, pantothetin, and other vitamins, nicotinamide, benzyl nicotinate, γ-oryzanol, allantoin, glycyrrhizinic acid ( Salt), glycyrrhetinic acid and its derivatives, hinokitiol, mucidin, bisabolol, eucalyptol, thymol inositol, pantoterethyl ether, ethinyl estradiol, cephalandin, placenta extract, various drugs, Rumex, Clara, kohone, orange, sage, sawtooth Grass, mallow, senkyu, senburi, thyme, spruce, spruce, birch, horsetail, loofah, horse chestnut, yukinoshita, arnica, lily, mugwort, peony, aloe, gardenia, sawara etc. Organic solvents, alcohol, polyhydric alcohol, water, natural extract extracted with an aqueous alcohol, dyes and the like may be added in amounts not detrimental to the effects of the present invention.

[0017]

EXAMPLES Next, the present invention will be described in more detail with reference to Examples and Comparative Examples. All percentages are% by weight.
Means Prior to the examples, the evaluation method used in the present invention will be described.

[Evaluation Method] The usability was evaluated by about 10 women specialized panels based on the following evaluation criteria. (1) Feel of use Spread on skin ◎: Very good spread. ◯: Good spread. Δ: Slightly stretched. X: The spread is poor. Stickiness ◎: Very little stickiness. ○: Little stickiness. Δ: Slightly sticky. X: Sticky. Freshness ◎: Very fresh. ○: Fresh. Δ: Slightly fresh. X: Not fresh.

(2) Emulsion-stability creams were prepared at 50 ° C, 37 ° C, room temperature and 0 ° C, respectively.
It was allowed to stand for 1 month at room temperature and its stability was evaluated. ⊚: No abnormality in appearance. ○: A part of the oil is floating. Δ: Oil is floating. X: Separated.

Examples 1 to 6 and Comparative Examples 1 and 2 Emulsions were prepared according to the formulations shown in Tables 1 and 2, and the feeling of use and emulsion stability were evaluated, and the average particle size and particle size of the emulsified particles were also evaluated. The distribution was measured. The results are shown in Table 3. As the organopolysiloxane elastomer spherical powder, trefil E-505C was used.

[0021]

[Table 1] ───────────────────────────────────                                                Example       Ingredient (%) ──────────────────                                     1 2 3 4 5 6 ─────────────────────────────────── Squalane 5.0 4.0 5.0 5.0 5.0 4.0 Isopropyl myristate 5.0 4.0 5.0 2.0 5.0 4.0 Cetyl 2-ethylhexanoate 5.0 1.0 5.0 8.0 5.0 1.0 Decamethylcyclopentasiloxane 10.0 5.0 5.0 5.0 10.0 5.0 Methylphenyl polysiloxane 5.0 10.0 10.0 10.0 5.0 10.0 Organopolysiloxane elastomer Spherical powder 3.0 3.5 0.8 3.5 3.0 3.5 Dimethylsilylated silica powder 1.0 0.5 0.8 0.5 1.0 0.5 Glycerol isostearate (HLB = 4) 0.5 1.0 1.0 1.0 0.1 0.5 Zinc stearate 3.0 2.0 5.0 0.01 3.0 10.0 L-Glutamate monosodium 1.0 1.0 1.0 1.0 1.0 1.0 Purified water balance balance balance balance balance balance balance balance Dipropylene glycol 10.0 10.0 10.0 10.0 10.0 10.0 ───────────────────────────────────

[0022]

[Table 2]

[0023]

[Table 3] ───────────────────────────────────               (1) Feel of use (2) Emulsion stability Emulsion particles (μm)   Evaluation ────────── ────────── ─────────           Mean particle size distribution on the skin           Spreadability 0 ℃ Room temperature 37 ℃ 50 ℃ Particle size ─────────────────────────────────── Example 1 ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ 1 to 5 0.1 to 15 Example 2 ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ 1 to 5 0.1 to 20 Example 3 ◎ ○ ◎ ◎ ◎ ◎ ◎ ◎ 1 to 5 0.1 to 20 Example 4 ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ 1 to 5 0.1 to 15 Example 5 ◎ ◎ ○ ○ ◎ ○ ○ 1 to 2 0.1 to 5 Example 6 ◎ ○ ○ ◎ ◎ ○ ○ 5 to 201 to 50 ─────────────────────────────────── Comparative Example 1 ◎ ○ △ ◎ ◎ ◎ ◎ ○ 1 to 5 0.1 to 15 Comparative Example 2 ◎ ○ △ ◎ ◎ ○ △ 5 to 20 1 to 50 ───────────────────────────────────

Example 5 Moisturizing cream (1) Purified water balance (2) Polyethylene glycol 400 1.0 wt% (3) Na lactate 1.0 (4) 1,3-butylene glycol 5.0 (5) Liquid paraffin 5.0 (6) Cetyl-2-ethylhexanoate 5.0 (7) Pentaerythritol Tetra-2-ethylhexanoate 3.0 (8) Methylphenylpolysiloxane 3.0 (9) Decamethylcyclopenta Siloxane 10.0 (10) Trefil E-505C 2.5 (11) Aerosil R972 2.0 (12) Silicon SC9450N 1.0 (Shin-Etsu Silicone Co., Ltd., HLB = 4.5) (13) Zinc stearate 2. 0 (14) Vitamin E-acetate 3.0 (15) Methylparaben Suitable amount (16) Perfume Suitable amount (Production method) (5), (6), (7), (8), (9), (12), (13) ), (14), (15), (1
The powders of (10) and (11) are gradually added to the oil phase obtained by mixing 6) at room temperature to uniformly disperse the powder. Then, (2) in (1), (3) was dissolved, the aqueous phase obtained by adding (15) in (4) was slowly added to the oil phase, and after homogenous dispersion with a homomixer. , Prepare emulsified particles and obtain a moisturizing cream.

Example 6 Emulsion (1) Purified water Balance (2) Salt 1.0% by weight (3) Trimethylglycine 5.0 (4) Propylene glycol 8.0 (5) Squalene 5.0 (6) Pentaerythritol Tetra-2-ethylhexanoate 5.0 (7) Methylphenylpolysiloxane 5.0 (8) Octamethylcyclotetrasiloxane 15.0 (9) Trefil E-505C 2.0 (10) Aerosil R972 0.5 (11) Silicon SC9450N 3.0 (manufactured by Shin-Etsu Silicone Co., Ltd., HLB = 4.5) (12) Aluminum stearate 0.5 (13) Magnesium ascorbyl phosphate 4.0 (14) Methylparaben Appropriate amount (15) Perfume Appropriate amount (Production method) (5), (6), (7), (8), (11), (12), (15) in the oil phase mixed at room temperature, powder (9), (10) Is gradually added while uniformly dispersing. Then, in (2), (3), (13) dissolved in (1), the aqueous phase obtained by adding (14) dissolved in (4) was gradually added to the oil phase and homogenized with a homomixer. After uniform dispersion, arrange the emulsified particles,
Get the emulsion.

Example 7 Sunscreen Emulsion (1) Purified Water Remainder (2) Glycine 1.0% by Weight (3) Glutamic Acid Na 1.0 (4) Propylene Glycol 8.0 (5) Pentaerythritol Tetra-2- Ethylhexanoate 1.0 (6) Cetyl-2-ethylhexanoate 1.0 (7) Methylphenylpolysiloxane 5.0 (8) Decamethylcyclopentasiloxane 15.0 (9) Trefil E-506C 3 .0 (10) Aerosil R972 0.5 (11) Silicon SC9450N 1.0 (Shin-Etsu Silicone Co., Ltd., HLB = 4.5) (12) Diglycerol monoisostearate 1.0 (HLB = 5.5) ( 12) Magnesium stearate 2.0 (14) Octyl methoxycinnamate 10.0 (15) 2,4-Dihydroxybenzophenone 3.0 (16) Methylparaben Suitable amount (17) Perfume Suitable (Procedure) (5), (6), (7), (8), (11), (12), (13), (14), (15),
The powders of (9) and (10) are gradually added to the oil phase obtained by mixing (17) at room temperature, and uniformly dispersed. Then, (2) in (1), dissolved in (3), the aqueous phase obtained by adding (16) in (4) was slowly added to the oil phase, after homogenous dispersion with a homomixer The emulsion particles are prepared to obtain a sunscreen emulsion.

[0027]

As described above, according to the present invention,
It exhibits a good emulsified state and does not change with temperature or with time.
Moreover, it is possible to obtain a water-in-oil type emulsion cosmetic which spreads well on the skin at the time of application and has a fresh, refreshing and good feeling of use.

Continuation of front page (56) Reference JP-A-3-72942 (JP, A) JP-A-7-61907 (JP, A) JP-A-6-40847 (JP, A) JP-A-5-317687 (JP , A) JP 58-3630 (JP, A) JP 53-34931 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61K ^7/ 00-7/50

Claims (4)

(57) [Claims] 1. (A) Organopolysiloxane elastomer spherical powder having an average particle size of 2.0 to 5.0 μm and a particle size distribution of 1 to 15 μm, and (B) a hydrophobized silica powder having an average particle size of 0.2 μm or less. And a mixed powder having a weight ratio of (A) to (B) of 1: 0.1 to 1: 5, and (C) 30% by weight or more of the total oil phase component is silicone oil. Oil phase,
(D) Sorbitan fatty acid esters, glycerol fat
Acid esters, polyoxyethylene hydrogenated castor oil, poly
A water-in-oil type emulsion cosmetic comprising an emulsifier having an HLB of 7 or less selected from ether-based silicone activators , (E) metallic soap, and (F) water. 2. The water-in-oil type emulsion cosmetic composition according to claim 1, wherein the weight ratio of the mixed powder of (A) + (B) to the oil phase of (C) is 1: 5 to 1:30. . 3. The compounding amount of (A) + (B) + (C) is 4.
0-90.0 wt%, (D) HLB of 7 or less emulsifier content of 0.01-5.0 wt%, (E) metal soap content of 0.01-5.0 wt%, The water-in-oil emulsion cosmetic according to claim 2, wherein the compounding amount of (F) water is 9.0 to 95.0% by weight. 4. The average particle size of the emulsified particles is 1.0 to 10.0.
The water-in-oil emulsion cosmetic according to any one of claims 1 to 3, which has a particle size distribution of 0.1 to 20 µm.