JP3406437B2 - 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, has no change with temperature or aging, and spreads well. The present invention relates to a water-in-oil type emulsion cosmetic having a refreshing and good feeling.

[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 when the viscosity of the outer phase is lowered, has good elongation, and has a refreshing feeling of use.

[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 in which different powders are combined at a specific weight ratio and a specific oil content, an oil that has good elongation, a refreshing feeling of use, and good stability without increasing the viscosity of the outer phase 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;
(E) A water-in-oil type emulsion cosmetic comprising 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 9.0 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. Among them, a polyether type silicone activator is particularly preferable, and specific examples thereof include those having the structure of the following chemical formula (1).

[0012]

[Chemical 1]

(In the formula, R represents a hydrogen atom or a carbon number of 1 to 5)
In the formula, m is 1 to 150 on average, n is 1 to 50 on average, and a and b are 0 to 35 on average. ) The content of the component (D) is 0.1 to 5.0% by weight of the whole system.
Is preferred.

The component (E) of the present invention, water, is mixed in the system in an amount of 9.0 to 90.0% by weight.

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, moisturizers such as maltitol, methyl cellulose, gum arabic, polyvinyl alcohol, montmorillonite, thickeners such as laponite, butylhydroxytoluene, tocopherol, antioxidants such as phytic acid,
Benzoic acid, salicylic acid, sorbic acid, alkyl esters of paraoxybenzoic acid (ethylparaben, butylparaben, etc.), antibacterial preservatives 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, and other 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.

[0016]

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. Refreshing ◎: Very refreshing. ○: Refreshed. Δ: A little refreshing. X: Not refreshed.

(2) The emulsion-stabilized cream was 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 4 and Comparative Examples 1 to 6 Emulsions were prepared according to the formulations shown in Tables 1 and 2, and the feeling of use and emulsion stability were evaluated. The results are shown in Table 3. As the organopolysiloxane elastomer spherical powder, trefil E-505C was used.

[0020]

[Table 1] ────────────────────────────────                                               Example       Ingredient (%) ───────────────                                        1 2 3 4 ──────────────────────────────── Squalane 5.0 5.0 5.0 5.0 Isopropyl myristate 5.0 5.0 5.0 5.0 Cetyl 2-ethylhexanoate 5.0 5.0 5.0 5.0 Decamethylcyclopentasiloxane 10.0 5.0 5.0 5.0 Dimethylpolysiloxane 5.0 10.0 10.0 10.0 Organopolysiloxane elastomer Spherical powder 3.0 3.5 3.5 0.2 Dimethylsilylated silica powder 1.0 0.5 3.0 0.7 Glycerol isostearate (HLB = 4) 3.0 3.0 3.0 3.0 L-Glutamate monosodium 1.0 1.0 1.0 1.0 Purified water balance balance balance balance balance Dipropylene glycol 10.0 10.0 10.0 10.0 ────────────────────────────────

[0021]

[Table 2] ───────────────────────────────────                                                Comparative example       Ingredient (%) ───────────────────                                     1 2 3 4 5 6 ─────────────────────────────────── Squalane 10.0 10.0 10.0 10.0 5.0 5.0 Isopropyl myristate 10.0 10.0 10.0 10.0 5.0 5.0 Cetyl 2-ethylhexanoate 10.0 10.0 5.0 5.0 5.0 5.0 Decamethylcyclopentasiloxane − − − − 10.0 10.0 Dimethyl polysiloxane --5.0 5.0 5.0 5.0 Organopolysiloxane elastomer Spherical powder 3.0 3.0 3.0 3.0 2.0 0.3 Dimethylsilylated silica powder 1.0 0.1 1.0 0.1 0.1 2.0 Glycerol isostearate (HLB = 4) 3.0 3.0 3.0 3.0 3.0 3.0 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 3] ───────────────────────────────────                     (1) Usability (2) Emulsion stability   Evaluation ───────────────────────────────           Smoothness on the skin, refreshing feeling 0 ℃, room temperature 37 ℃ 50 ℃ ─────────────────────────────────── Example 1 ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ Example 2 ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ Example 3 ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ Example 4 ◎ ◎ ◎ ◎ ◎ ◎ ◎ ○ ─────────────────────────────────── Comparative Example 1 ○ ○ × ◎ ◎ ◎ ◎ ◎ Comparative Example 2 ○ ○ × ◎ ◎ ○ ○ Comparative Example 3 ○ ◎ △ ◎ ◎ ◎ ◎ ◎ Comparative Example 4 ◎ ◎ △ ◎ ◎ ○ ○ ○ Comparative Example 5 ◎ ◎ ◎ ◎ ◎ ◎ ○ △ Comparative Example 6 ◎ △ △ ◎ ◎ ○ △ ───────────────────────────────────

Example 5 Moisturizing cream (1) Purified water balance (2) Na lactate 1.0% by weight (3) 1,3-butylene glycol 5.0 (4) Liquid paraffin 5.0 (5) Cetyl-2 -Ethylhexanoate 5.0 (6) Pentaerythritol Tetra-2-ethylhexanoate 3.0 (7) Methylphenylpolysiloxane 3.0 (8) Decamethylcyclopentasiloxane 10.0 (9) Trefil E -505C 2.5 (10) Aerosil R972 2.0 (11) Silicon SC9450N 2.0 (Shin-Etsu Silicone Co., HLB = 4.5) (12) Vitamin E-acetate 3.0 (13) Methylparaben Suitable amount (14 ) Fragrance (manufacturing method) (4), (5), (6), (7), (8), (11), (12), (14) in the oil phase mixed at room temperature, (9) , (10) powder is gradually added and dispersed uniformly. Then, in (1) dissolved in (2),
An aqueous phase obtained by adding the solution of (13) to (3) is gradually added to the oil phase, uniformly dispersed by a homomixer, and then emulsion particles are prepared to obtain a moisturizing cream.

Example 6 Emulsion (1) Purified water Balance (2) Salt 1.0% by weight (3) Polyethylene glycol 11000 1.0 (4) Propylene glycol 8.0 (5) Squalene 5.0 (6) Penta Erythritol 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) Magnesium ascorbyl phosphate 1.0 (13) Methylparaben Appropriate amount (14) Perfume Appropriate amount (production method) (5), ( The powders of (9) and (10) are gradually added to the oil phase obtained by mixing 6), (7), (8), (11) and (14) at room temperature while uniformly dispersing them. Then, in (2), (3), (12) dissolved in (1),
An aqueous phase obtained by adding the solution of (13) to (4) is gradually added to the oil phase, uniformly dispersed with a homomixer, and then emulsion particles are prepared to obtain an emulsion.

Example 7 Sunscreen Emulsion (1) Purified Water Remainder (2) Polyethylene Glycol 6000 1.0 wt% (3) Glutamate Na 1.0 (4) Propylene Glycol 8.0 (5) Pentaerythritol Tetra- 2-Ethylhexanoate 10.0 (6) Cetyl-2-ethylhexanoate 5.0 (7) Methylphenylpolysiloxane 5.0 (8) Decamethylcyclopentasiloxane 15.0 (9) Trefil E- 506C 2.0 (10) Aerosil R972 0.5 (11) Silicon SC9450N 1.0 (manufactured by Shin-Etsu Silicone Co., Ltd., HLB = 4.5) (12) Diglycerol monooleate (HLB = 6.5) 2.0 ( 13) Octyl methoxycinnamate Appropriate amount (14) 2,4-Dihydroxybenzophenone Appropriate amount (15) Methylparaben Appropriate amount (16) Perfume Appropriate amount (Production method) (5), (6), (7), (8), (11), (12), ( The powders of (9) and (10) are gradually added to the oil phase obtained by mixing 13), (14) and (16) at room temperature while uniformly dispersing them. 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. The emulsion particles are prepared to obtain a sunscreen emulsion.

[0026]

As described above, according to the present invention,
It exhibits a good emulsified state and does not change with temperature or with time.
It is possible to obtain a water-in-oil type emulsified cosmetic having a smooth and refreshing feeling of use.

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-3-72942 (JP, A) JP-A-7-61907 (JP, A) JP-A-6-40847 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) A61K ^7/ 00-7/50

Claims (3)

(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 and (E) water, which is selected from ether-based silicone activators . 2. The water-in-oil type emulsified cosmetic composition according to claim 1, wherein the weight ratio of the mixed powder of (A) + (B) to the oil of (C) is 1: 5 to 1:30. 3. The compounding amount of (A) + (B) + (C) is 9.
0 to 90.0% by weight, (D) HLB of 7 or less is included in an amount of 0.1 to 5.0% by weight, and (E) water is included in an amount of 9.0 to 90.0% by weight. The water-in-oil emulsion cosmetic according to claim 2.