JPH08259432A - Water-in-oil type emulsion preparation - Google Patents

Abstract

PURPOSE: To obtain a water-in-oil type emulsion preparation which contains a hydrophobic powder and a liquid fatty acid and shows excellent dispersion without adverse effect on the safety as a dermal preparation for external use. CONSTITUTION: This emulsion preparation contains 0.1-60wt.% of a hydrophobic powder, for example, polyamide resin powder and 0.1-5wt.% of an oily fatty acid. Additionally, an oil solution, a humectant, a surfactant, a medicinal preparation, a colorant, a powder and a flavor are properly formulated to prepare this oil-based powdery cosmetic according to a customary manner. As the oily fatty acid, are used one or more selected from palmitoleic acid, isostearic acid, linolic acid and oleic acid. Even when a powder is hydrophilic, it can be used as a hydrophobic one, if it is made hydrophobic by its surface treatment.

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 emulsion preparation, and more particularly to a water-in-oil emulsion preparation having excellent dispersibility without impairing safety as an external preparation for skin.

[0002]

2. Description of the Related Art Water-in-oil (W / O) emulsion preparations are superior in water resistance and sweat resistance to oil-in-water (O / W) emulsion preparations, so that they can be used in skin care products (for example, hand creams and summer products). For external skin preparations such as makeup base), W /
O emulsion formulations are advantageously used.

When a W / O emulsion is used as an external preparation for the skin, a hydrophobic powder is usually used or a surface of the powder is made hydrophobic in order to improve dispersibility when the powder is added as an additive component. Although the treated hydrophobized powder is used, sufficient dispersibility cannot be obtained by this alone. Therefore, addition of a cationic surfactant has been performed, but it is not always possible to completely disperse it, and also from the viewpoint of safety as an external preparation for the skin, a cationic surfactant is used. There was concern about the addition of activators.

From these circumstances, it is strongly desired to develop a W / O emulsion formulation containing a hydrophobic powder and having excellent dispersibility without impairing the safety as a skin external preparation. It was rare.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a W / O emulsion formulation containing a hydrophobic powder, which is excellent in dispersion without impairing the safety as an external preparation for skin. The object is to provide a W / O emulsion preparation having properties.

[0006]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned conventional problems, the present inventors further added a liquid fatty acid to a W / O emulsion formulation containing a hydrophobic powder. As a result, they have found that the above object can be achieved, and have completed the present invention based on this finding.

That is, according to the present invention, there is provided a W / O emulsified preparation characterized in that a hydrophobic powder and a liquid fatty acid are blended.

The W / O emulsion preparation of the present invention will be described in detail below.

The liquid fatty acid used in the present invention can be used without particular limitation as long as it is a liquid fatty acid at room temperature, and examples thereof include fatty acids having 8 to 18 carbon atoms, but are not limited thereto. Not something. Specific examples include 2-ethylhexanoic acid, undecylenic acid, palmitooleic acid, isostearic acid, ricinoleic acid, linoleic acid, and oleic acid. Among them, palmitooleic acid, isostearic acid, linoleic acid, Oleic acid and the like are preferably used. These may use 1 type, or may use 2 or more types.

The liquid fatty acid content is preferably 0.1 to 5.0% by weight, more preferably 0.5 to 3.0% by weight, based on the total weight of the emulsion preparation. If the content of the liquid fatty acid is less than 0.1% by weight, it is difficult to completely disperse the hydrophobic powder in the oil phase. On the other hand, even if the content of the liquid fatty acid exceeds 5.0% by weight, the further effect of dispersibility of the hydrophobic powder cannot be expected.

The hydrophobic powder used in the present invention includes not only hydrophobic powder itself, but also hydrophobic powder such as hydrophilic powder whose surface is hydrophobized.

Specific examples of the hydrophobic powder include polyamide resin powder (nylon powder), polyethylene powder,
Polymethylmethacrylate powder, polystyrene powder, styrene-acrylic acid copolymer resin powder, benzoguanamine resin powder, polytetrafluoroethylene powder, organic powder such as cellulose powder, and silicon powder such as trimethylsilsesquioxane powder. Is exemplified.

Examples of powder components of the hydrophobized powder include talc, kaolin, mica, sericite, muscovite, phlogopite, synthetic mica, phlogopite, biotite, lithia mica, permiculite, magnesium carbonate, Calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, tungstate metal salt, magnesium, silica, zeolite, barium sulfate, calcined calcium sulfate (calculated gypsum), calcium phosphate, fluoroapatite, Hydroxyapatite, ceramic powder, metallic soap (zinc myristate, calcium palmitate, aluminum stearate, etc.), inorganic powder such as boron nitride; inorganic white pigment such as titanium dioxide, zinc oxide; iron oxide (red iron oxide), iron titanate Nothing Red pigment; .gamma. inorganic brown pigments such as iron oxide; yellow iron oxide, inorganic yellow pigments loess and the like;
Inorganic black pigments such as black iron oxide, carbon black and low-order titanium oxide; inorganic purple pigments such as mango violet and balt violet; inorganic green pigments such as chromium oxide, chromium hydroxide and cobalt titanate; ultramarine blue and navy blue. Inorganic blue pigments such as; titanium oxide coated mica, titanium oxide coated bismuth oxychloride, titanium oxide coated talc, colored titanium oxide coated mica, bismuth oxychloride, pearl pigments such as scale foil; metal powders such as aluminum powder and copper powder Examples include pigments and the like. In the present invention, those obtained by hydrophobizing these powder components are used.

Any method can be used as the hydrophobizing treatment as long as it can impart water repellency. The method is not limited, and examples thereof include a gas phase method, a liquid phase method, an autoclave method,
A usual surface treatment method such as a mechanochemical method can be used.

For example, when a hydrophobizing agent is added to the raw material powder for treatment, it may be added after diluting it with an appropriate solvent (dichloromethane, chloroform, hexane, ethanol, xylene, volatile silicone, etc.), or You may add directly. A ball mill, a hogersite ball mill, a vibrating ball mill, an attritor, a pot mill, a rod mill, a pan mill, a homomixer, a homodisper, a Henschel mixer, a Nauta mixer and the like can also be used for mixing and stirring the powder and the treating agent. In addition to this, a method of polymerizing a cyclic organosiloxane on the surface of a powder at a low temperature of 100 ° C. or lower by a gas phase reaction utilizing the activity of the surface of the powder (Japanese Patent Publication No. 1-54380), or a surface after the above method The method of adding a pendant group such as glycerol monoallyl ether to the Si-H portion of the silicone polymer (Japanese Patent Publication No. 1-54381) can be used.

The hydrophobizing agent is not particularly limited, but is a fatty acid dextrin-treated powder, trimethylsiloxysilicic acid-treated powder, fluorine-modified trimethylsiloxysilicic acid-treated powder, methylphenylsiloxysilicic acid-treated powder, fluorine-modified methylphenylsiloxy. Silicic acid treated powder,
Dimethyl polysiloxane, diphenyl polysiloxane,
Low-viscosity to high-viscosity oily polysiloxane-treated powder such as methylphenylpolysiloxane, gum-like polysiloxane-treated powder, methylhydrogenpolysiloxane-treated powder, fluorine-modified methylhydrogenpolysiloxane-treated powder, methyltrichlorosilane, methyltrialkoxysilane , Hexamethyldisilane, dimethyldichlorosilane, dimethyldialkoxysilane, trimethylchlorosilane, trimethylalkoxysilane and other organic silyl compounds or their fluorine-substituted treatment powder, ethyltrichlorosilane, ethyltrialkoxysilane, propyltrichlorosilane, Propyltrialkoxysilane, hexyltrichlorosilane, hexyltrialkoxysilane, long-chain alkyltrichlorosilane, long-chain alkyltriethoxysilane Organic modified silane or treated powder according to their fluorine substitution products, amino-modified polysiloxane treatment powder, fluorine-modified polysiloxane treatment powder,
Fluorinated alkyl phosphoric acid treated powder and the like can be mentioned.

One kind of these hydrophobic powders may be used,
Alternatively, two or more kinds may be used. Further, the powder is not limited to the above components as long as it is a hydrophobic powder applicable to general cosmetics. In the present invention, the blending amount of the hydrophobic powder is 0.1% by weight or more, and the amount according to the purpose can be blended, but generally 0.1 to 60.0% by weight, preferably 0.1 to 40.0%. % By weight.

In the W / O emulsion preparation of the present invention, an oil agent generally used in cosmetics within a quantitative and qualitative range that does not impair the quality such as appearance stability and viscosity and does not impair the effects of the present invention, Moisturizer, surfactant, drug, colorant, powder,
Fragrances and the like can be added.

Examples of the oil agent include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, southern oil, castor oil, linseed oil. Natural vegetable oils such as oil, safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, teaseed oil, kaya oil, rice bran oil, cinnamon oil, Japanese tung oil, jojoba oil, germ oil, etc .; triglycerin, glyceryl trioctanoate. , Liquid oils and fats such as glycerin triisopalmitate; cocoa butter, coconut oil, horse fat, hardened coconut oil, palm oil, beef tallow, sheep fat, hardened beef tallow, palm kernel oil, lard, beef bone oil, mokuro kernel oil, Animal and vegetable liquid oils and fats such as hydrogenated oil, beef tallow, mokuro, hydrogenated castor oil, beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ivota Cormorant, whale wax, montan wax, wax wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugar cane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate , Waxes such as POE cholesterol ether, lanolin fatty acid polyethylene glycol and POE hydrogenated lanolin alcohol ether; hydrocarbon oils such as liquid paraffin, ozokerite, squalene, pristane, paraffin, ceresin, squalene, petrolatum and microcrystalline wax; isopropyl myristate , Cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, LA Hexyl phosphoric acid, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate,
Myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearyl acid, ethylene glycol di-2-ethylhexylate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate,
Neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexylate, trimethylolpropane triisostearate, penta-2-ethylhexanoic acid pentaneerythritol,
Glycerin tri-2-ethylhexylate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glyceryl trimyristate, tri-2-heptylundecanoic acid glyceride, castor oil fatty acid methyl ester, olein Acid oil, cetostearyl alcohol, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di-adipate
2-heptylundecyl, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, acetic acid. Synthetic ester oils such as ethyl, butyl acetate, amyl acetate, triethyl citrate; dimethyl polysiloxane, methylphenyl polysiloxane, methyl hydrogen polysiloxane decamethyl polysiloxane, dodecamethyl polysiloxane, tetramethyl tetrahydrogen polysiloxane, etc. Silicone oil etc. are mentioned.

Examples of moisturizing ingredients include polyethylene glycol, propylene glycol, glycerin, 1,3
-Butylene glycol, xylitol, sorbitol,
Maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate, sodium lactate, bile salt, dl-pyrrolidone carboxylate, short chain soluble collagen, diglycerin (EO) PO Examples thereof include adducts, Issai rose extract, Astragalus sinensis extract, Merrilot extract and the like.

Examples of the surfactant include amphoteric surfactants, lipophilic nonionic surfactants, hydrophilic nonionic surfactants, etc., but are not particularly limited as long as W / O emulsification is possible. Not a thing.

Of these, lipophilic nonionic surfactants include, for example, sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate,
Sorbitan fatty acid esters such as sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, sorbitan trioleate, penta-2-ethylhexylate diglycerol sorbitan, tetra-2-ethylhexylate diglycerol sorbitan; monocotton oil fatty acid glycerin, Glycerin monoerucate,
Glycerin glycerin sesquioleate, glyceryl monostearate, glycerin α, α'-oleate pyroglutamate, glyceryl monostearate Malic acid and other glycerin glycerin fatty acids; Propylene glycol fatty acid esters such as propylene glycol monostearate; Oil derivatives; glycerin alkyl ether and the like.

Examples of hydrophilic nonionic surfactants include POE sorbitan monooleate, POE sorbitan monostearate, POE sorbitan monooleate and P
POE sorbitan fatty acid esters such as OE sorbitan tetraoleate; POE sorbit monolaurate,
POE sorbit monooleate, POE sorbit pentaoleate, POE sorbit monostearate, and other POE sorbit fatty acid esters; PE glycerin monostearate, POE glycerin monoisostearate, POE glycerin triisostearate, and other Ps
OE glycerin fatty acid esters; POE monooleate, POE distearate, POE monodiolate,
POE fatty acid esters such as ethylene glycol distearate; POE lauryl ether, POE oleyl ether, POE stearyl ether, POE behenyl ether, POE 2-octyldodecyl ether, POE
POE alkyl ethers such as cholestanol ether; POE alkyl phenyl ethers such as POE octyl phenyl ether, POE nonyl phenyl ether, POE dinonyl phenyl ether; Pluronic types such as Bourronic; POE / POP cetyl ether,
POE / POP2-decyl tetradecyl ether, PO
POE such as E ・ POP monobutyl ether, POE ・ POP hydrogenated lanolin, POE ・ POP glycerin ether
・ POP alkyl ethers; Tetronic such as Tetra POE / Tetra POP ethylenediamine condensates; PO
E castor oil, POE hydrogenated castor oil, POE hydrogenated castor oil monoisostearate, POE hydrogenated castor oil triisostearate, POE hydrogenated castor oil monopyroglutamic acid monoisostearate diester, POE hydrogenated castor oil POE castor oil such as maleic acid Hydrogenated castor oil derivative; P
POE beeswax lanolin derivatives such as OE sorbit beeswax; alkanol amides such as coconut oil fatty acid diethanolamide, lauric acid monoethanolamide and fatty acid isopropanolamide; POE propylene glycol fatty acid ester; POE alkylamine; POE fatty acid amide; sucrose fatty acid ester; Examples include POE nonylphenylformaldehyde condensate; alkylethoxydimethylamine oxide; trioleylphosphoric acid and the like.

[0024]

The present invention will be described in more detail based on the following examples, but the invention is not intended to be limited thereto.

Samples having the compositions shown in the following Examples 1 to 6 and Comparative Example 1 were manufactured. The dispersibility of each of these samples was evaluated according to the following evaluation criteria. [Dispersibility] Each sample was thinly coated on a blackboard, and the degree of aggregation of the hydrophobic powder immediately after coating was visually observed to evaluate the degree of dispersibility.

Example 1 (Ingredients) (% by weight) Squalane 19.0 Cetyl isooctanoate 5.0 Vaseline 2.0 Isostearic acid 1.0 Octyl methoxycinnamate 7.0 2-Hydroxy-4-methoxybenzophenone 2.0 4-tert-Butyl-4′-methoxydibenzoylmethane 1.0 Dioctamethoxycinnamate monooctylglycerin 2.0 Stearic acid-treated fine particle titanium oxide 5.0 (trade name: “Titanium oxide 100T”) Trimethylsilsesquioxane powder 5.0 (trade name: "Tospearl 145") Vitamin E acetate 0.05 Fragrance Suitable amount Organically modified clay mineral (trade name: "Benton 38") 0.2 POE glycerol triisostearate 1 .5 glycerin 5.0 dipropylene glycol 3.0 po Polyethylene glycol (PEG6000) 1.0 EDTA-3Na-2H ₂ O 0.1 Methylparaben 0.1 Ion-exchanged water Residual Comparative Example 1 With the same composition components as in Example 1 except that isostearic acid was not added, A sample of Comparative Example 1 was manufactured.

The dispersibility of each sample of Example 1 and Comparative Example 1 was evaluated according to the above evaluation criteria. as a result,
In the sample of Example 1, it was found that the hydrophobic component powder did not aggregate at all and the dispersibility was good. On the other hand, in the sample of Comparative Example 1, the coating color was white, the aggregation of the hydrophobic powder was observed, and the dispersibility was poor. That is, it was confirmed from Example 1 and Comparative Example 1 that the addition of isostearic acid (liquid fatty acid) contributed to the dispersibility of the hydrophobic powder.

Example 2 (Ingredients) (wt%) Decamethylpentacyclosiloxane 25.0 Dimethylpolysiloxane (6CS) 10.0 Oleic acid 0.5 Isopropyl paramethoxycinnamate 5.0 Octylmethoxycinnamate 5 .0 Silicone resin 3.0 Polyoxyethylene / methylpolysiloxane copolymer 3.0 Stearyl glycyrrhetinate 0.1 Perfume Appropriate amount Nylon powder (Nylon SP-500) 5.0 Methylhydrogenpolysiloxane treatment Titanium oxide 7.0 1,3-butylene glycol 5.0 Phenoxyethanol 0.3 Ion-exchanged water Residue Using the sample of Example 2, the dispersibility was evaluated according to the above evaluation criteria, and as a result, aggregation of the hydrophobic powder was performed. No discoloration occurred, indicating good dispersibility .

Example 3 (Ingredients) (wt%) Solid paraffin 2.0 Microcrystalline wax 6.0 Liquid paraffin 20.0 Isopropyl palmitate 6.0 Isostearic acid 3.0 POE (10) glyceryl triisostearate 2.5 POE (5) hydrogenated castor oil 2.2 diglycerin trioleate 1.2 propylparaben 0.2 dibutylhydroxytoluene (BHT) 0.05 glycerin 8.0 hyaluronic acid 0.05 sorbit solution (70%) 5. 0 Polyethylene glycol (PEG6000) 2.5 Purified water Residue The sample of Example 3 was used to evaluate dispersibility in accordance with the above evaluation criteria. As a result, it was found that the hydrophobic powder did not aggregate at all and the dispersibility was good.

Example 4 (Ingredients) (wt%) Glyceryl monooleate 1.5 Diglyceryl diisostearate 2.1 Linoleic acid 2.0 Organically modified clay mineral (Benton 38) 2.2 Solid paraffin 3.0 Vaseline 5.0 Isopropyl myristate 2.0 Liquid paraffin 15.0 Polydimethylpolysiloxane (20CS) 5.0 Fine particle titanium oxide 8.0 Polyethylene powder 5.0 Vitamin E acetate 0.2 Butylparaben 0 2.2 Dibutylhydroxytoluene (BHT) 0.02 Glycerin 6.0 Propylene glycol 4.0 Purified water Residue Using the sample of Example 4, the dispersibility was evaluated according to the above evaluation criteria. As a result, it was found that the hydrophobic powder did not aggregate at all and the dispersibility was good.

Example 5 (Ingredient) (wt%) Decamethylpentacyclosiloxane 25.0 Dimethylpolysiloxane (6CS) 5.0 Isopropyl paramethoxycinnamate 5.0 Octylmethoxycinnamate 12.0 Palmitoolein Acid 5.0 Silicone resin 5.0 Polyoxyethylene / methylpolysiloxane copolymer 4.0 Glyceryl glycyrrhetinate 0.05 Perfume Appropriate amount Trimethylsilsesquioxane powder 5.0 (Brand name: "Tospearl 145") Hydrophobic Chemical treatment Titanium oxide (stearic acid treatment) 5.0 1,3-butylene glycol 5.0 Ethanol 3.0 Phenoxyethanol 0.2 Ion-exchanged water Residue Using the sample of Example 5, dispersibility was evaluated according to the above evaluation criteria. evaluated. As a result, it was found that the hydrophobic powder did not aggregate at all and the dispersibility was good.

Example 6 (Ingredients) (wt%) Decamethylpentacyclosiloxane 25.4 Dimethylpolysiloxane (6CS) 10.0 Oleic acid 0.1 Isopropyl paramethoxycinnamate 5.0 Octylmethoxycinnamate 5 .0 Silicone resin 3.0 Polyoxyethylene / methylpolysiloxane copolymer 3.0 Stearyl glycyrrhetinate 0.1 Perfume Appropriate amount Nylon powder (Nylon SP-500) 5.0 Methylhydrogenpolysiloxane treatment Titanium oxide 7.0 1,3-butylene glycol 5.0 Phenoxyethanol 0.3 Ion-exchanged water Residue Using the sample of Example 6, the dispersibility was evaluated according to the above evaluation criteria. As a result, it was found that the hydrophobic powder did not aggregate at all and the dispersibility was good.

[0033]

As described above in detail, according to the present invention, it is possible to improve the dispersibility of the hydrophobic powder by adding the liquid fatty acid to the W / O emulsion formulation containing the hydrophobic powder. Play.

Claims (3)

[Claims] 1. A water-in-oil emulsion formulation, characterized in that a hydrophobic powder and a liquid fatty acid are blended. 2. The water-in-oil emulsion preparation according to claim 1, wherein the liquid fatty acid is at least one selected from palmitooleic acid, isostearic acid, linoleic acid, and oleic acid. 3. A liquid fatty acid is added in an amount of 0.1 in the total amount of the emulsion.
The water-in-oil emulsion preparation according to claim 1 or 2, wherein the water-in-oil emulsion preparation is contained in an amount of ˜5.0% by weight.