JP2929024B2 - Water-in-oil emulsion cosmetics - Google Patents

Description

The present invention relates to a water-in-oil type emulsified cosmetic, more specifically, an oily base, a specific emulsifier mixture, an aqueous medium and a cosmetic pigment. The present invention relates to an emulsified water-in-oil type emulsified cosmetic which has excellent stability, high safety and good stability over time.

[Problems to be solved by conventional technology and invention]

Conventionally, water-in-oil type emulsified cosmetics have higher microbial resistance than oil-in-water type emulsified cosmetics, and also form an oil film on the skin surface to prevent moisture evaporation, and have excellent water repellency and little makeup loss Is frequently used in make-up products. However, as a disadvantage of the water-in-oil type emulsified cosmetic,
Since the oil phase is a continuous phase, the amount of water that can be stably contained therein is limited, and as a result, the oily feeling and the sticky feeling when applied are strong. As a solution to this problem, there has been disclosed a water-in-oil type cosmetic having a high water content using a mixed emulsifier such as α-monoglyceryl ether (Japanese Patent Publication No. 60-26366). Has a high viscosity throughout the system in order to keep a large amount of water stable, and has no oily feeling or sticky feeling, but has a drawback of poor spreadability.

Accordingly, there has been a strong demand for a water-in-oil type emulsified cosmetic which has good spreadability, excellent stability, and contains a large amount of water.

[Means for solving the problem]

The present inventors have conducted intensive studies in such circumstances, and as a result, by emulsifying an oily base and an aqueous medium using a specific emulsifier mixture, aging stability, safety and good feel during use have been improved. The present inventors have found that an excellent emulsion-type water-in-oil emulsion cosmetic can be obtained, and have completed the present invention.

That is, the present invention relates to the following components (A) to (G): (A) 15 to 55% by weight of an oily base (B) lipophilic nonionic surfactant selected from glycerin fatty acid ester, polyglycerin fatty acid ester and sorbitan fatty acid ester 0.2 to 10% by weight (C) Nonionic surfactant having higher hydrophilicity than component (B) 0.1 to 10% by weight (D) Polyvalent metal salt of saturated or unsaturated fatty acid having 10 to 22 carbon atoms 0.01 (E) an inorganic salt or an organic acid salt having a solubility in water at 20 ° C. of 0.2 g / 100 g water or more 0.05 to 5% by weight (F) an aqueous medium 34 to 74% by weight (G) surface water-repellent treatment The present invention provides an emulsion-type water-in-oil type emulsified cosmetic comprising 10 to 50% by weight of a cosmetic pigment prepared as described above.

In the present invention, the emulsion-type cosmetic refers to a cosmetic which does not maintain its shape when taken out and has a consistency of flowing.

The oily base of the component (A) used in the present invention includes:
For example, hydrocarbons such as squalane, liquid paraffin, and petrolatum; silicone oils such as dimethylpolysiloxane and dimethylcyclopolysiloxane; waxes such as spermaceti and carnauba wax; jojoba oil; octyldodecyl myristate; neopentyl glycol dioctanoate; Ester oils;
Natural animal and vegetable fats and oils such as olive oil and macadamian nut oil; diglyceroids and the like. These (A) components can be used alone or in combination of two or more, and are blended in an amount of 15 to 55% by weight (hereinafter, simply indicated as%), particularly 25 to 45% in the total amount of the cosmetic. Is preferred.

Among the lipophilic nonionic surfactants of the component (B) in the present invention, glycerin fatty acid esters are represented by the following general formula (I) [Wherein, R ₁ represents a linear or branched alkyl or alkenyl group having 10 to 24 carbon atoms].

(I) In the formula, specific examples of R ₁ include linear alkyl groups such as lauryl group, myristyl group, cetyl group, stearyl group, eicosyl group, docosyl group; linear alkenyl groups such as oleyl group and palmitooleyl group; 5,7,7-trimethyl-2
And branched chain alkyl groups having a side chain at the β-position, such as-(1,3,3-trimethylbutyl) octyl group, 2-heptylundecyl group, 2-hexyldecyl group, and 2-octyldodecyl group.

In the component (B), the polyglycerin fatty acid ester is represented by the following general formula (II) [Wherein, R ₂ represents a straight-chain or branched-chain saturated or unsaturated acyl group having 16 to 24 carbon atoms, or an acyl group derived from a 3 to 10-mer of a hydroxy fatty acid having 16 to 24 carbon atoms; Is 2-8
The number is represented by the following formula:

(II) In the formula, specific examples of R ₂ include a palmitoyl group,
Linear unsaturated acyl group such as stearoyl group; linear unsaturated acyl group such as oleoyl group; branched acyl group such as isostearyl group; acyl derived from 3- to 10-mer of hydroxyunsaturated fatty acid such as ricinoleic acid. And the like. M is 2 to 8. Among them, m = 5 to 8 is particularly preferable when the acyl group is a 4 to 10-mer of a hydroxyunsaturated fatty acid, and m = 2 to 4 is particularly preferable when the acyl group is derived from a 3 to 6-mer.

Further, as the sorbitan fatty acid ester in the component (B), the following general formula (III) or (IV) Wherein R ₃ represents a linear or branched alkyl or alkenyl group having 10 to 24 carbon atoms.

In the formulas (III) and (IV), specific examples of R ₃ include a straight-chain alkyl group such as stearyl group, eicosyl group and docosyl group; a straight-chain alkenyl group such as oleyl group; and 5,7,7-trimethyl-2. -(1,3,3-trimethylbutyl) octyl group, 2
-Heptylundecyl group, 2-hexyldecyl group, 2-
Examples thereof include a branched-chain alkyl group having a side chain at the β-position such as an octyldodecyl group, and a straight-chain alkenyl group is particularly preferable.

Such a component (B) can be used alone or in combination of two or more kinds, and is preferably 0.2 to 10%, particularly preferably 0.5 to 5%, in the total amount of the cosmetic.

As the nonionic surfactant of the component (C) in the present invention, any nonionic surfactant having a higher hydrophilicity than the component (B) can be used. In particular, the HLB (hydrophilic lipophilic balance) value of the (B) One or more greater than the components, ie
Nonionic surfactants having an HLB value in the range of 6 to 15 are preferred. Specific examples of the component (C) are shown in Table 1 below.

Among these nonionic surfactants, among the polyoxyethylene hydrogenated castor oil-based surfactants, those having an average addition mole number of POE of 5 to 30, a polyoxyethylene alkyl ether-based surfactant or a polyoxyethylene sorbite Fatty acid ester surfactants are preferred. Such a component (C) can be used alone or in combination of two or more, and is preferably 0.1 to 10%, more preferably 0.2 to 5%, in the total amount of the cosmetic.

The polyvalent metal salt of the saturated or unsaturated fatty acid as the component (D) in the present invention has 10 to 22 carbon atoms, and particularly preferably has 12 to 12 carbon atoms.
18 is preferable, and examples of these salts include calcium, magnesium, zinc, and aluminum salts. Among them, aluminum salts are particularly preferable. Specific examples of the component (D) include aluminum monostearate, aluminum distearate, aluminum monooleate, aluminum monopalmitate, and aluminum monolaurate. Such a component (D) can be used alone or in combination of two or more, and is blended in an amount of 0.01 to 2% in the total amount of the cosmetic, particularly 0.01 to 2%.
It is preferred that 1% be blended.

In the present invention, the inorganic salt and the organic acid salt of the component (E)
One having a solubility in water of 0.2 g / 100 g or more at 0 ° C. is used. Examples thereof include inorganic acids such as hydrochloric acid, sulfuric acid and nitric acid; oxycarboxylic acids such as citric acid, tartaric acid, lactic acid and malic acid; And carboxylic acids such as formic acid, acetic acid and sorbic acid; and alkali metal salts, alkaline earth metal salts and aluminum salts of aromatic carboxylic acids such as salicylic acid and benzoic acid.

These inorganic salts or organic acid salts may be incorporated in the cosmetic composition in the form of a salt, but the stoichiometric amount required to form the corresponding acid substance and base substance during the production of the cosmetic is required. A salt may be formed in the cosmetic by adding an amount.

Specific examples of preferred inorganic or organic acid salts include potassium sulfate, sodium sulfate, magnesium sulfate, aluminum sulfate, potassium nitrate, sodium nitrate, magnesium nitrate, aluminum nitrate, calcium nitrate, potassium chloride, magnesium chloride, sodium chloride, and calcium chloride. , Aluminum chloride, potassium carbonate, sodium carbonate, aluminum carbonate, potassium acetate, sodium acetate, calcium acetate, magnesium acetate, sodium formate, potassium formate, magnesium formate, sodium citrate, sodium tartrate, potassium sorbate, sodium sorbate, salicylic acid Sodium, potassium benzoate, sodium benzoate, etc., among which potassium sulfate, magnesium sulfate, potassium chloride, magnesium chloride, and ammonium chloride are particularly preferred. Miniumu, sodium citrate,
Sodium tartrate, potassium sorbate, sodium salicylate and sodium benzoate are preferred. Such a component (E) can be used alone or in combination of two or more, and is contained in an amount of 0.05 to 5%, particularly preferably 0.2 to 2%, in the total amount of the cosmetic.

The aqueous medium of the component (F) in the present invention includes water,
Alternatively, add ethanol, glycerin, sorbitol,
Propylene glycol, dipropylene glycol, 1,3
-A combination of water-soluble alcohols such as butanediol is used. The water and the water-soluble alcohol as the component (F) are incorporated in a total amount of 34 to 74% in the total amount of the cosmetic.

In addition, as the cosmetic pigment having a surface water repellent treatment of the component (G) in the present invention, powders generally used for cosmetics, for example, extenders such as talc, mica, kaolin, and sericite; titanium oxide Pigments such as titanium oxide, zinc oxide, iron oxide, etc .; titanium mica pearl pigments; and organic pigments such as blue 404, red 202, yellow 401 and the like, and surface water repellents composed of higher fatty acids, silicones or alkyl phosphates Can be used. Such component (G) can be used alone or in combination of two or more, and is blended in an amount of 10 to 50% in the total amount of the cosmetic,
In particular, it is preferable to mix 15 to 30%.

The water-in-oil emulsified cosmetic of the present invention is produced, for example, by mixing and stirring the above essential components by a conventional method.

In the cosmetic of the present invention, intercellular lipids (ceramide and the like), humectants, ultraviolet absorbers, and the like generally used as cosmetic components in addition to the essential components described above, as long as the effects of the present invention are not impaired. Components commonly used in cosmetics such as alcohols, chelating agents, pH adjusters, preservatives, thickeners, pigments, and fragrances can be appropriately blended.

〔The invention's effect〕

As described above, the water-in-oil type emulsified cosmetic of the present invention has the advantages of the conventional water-in-oil type emulsified cosmetic and has low viscosity and high water content. It is a cosmetic which has good oiliness, low stickiness, excellent persistence of cosmetic effect, and good stability.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.

Example 1 A liquid emulsified foundation having the composition shown in Table 2 was produced, and its emulsification stability, immediate appearance, and usability were evaluated.

<Production method> The aqueous phase component was heated and mixed, and kept at 70 ° C. On the other hand, the oil phase component was similarly heated and dissolved at 70 ° C., and then the powder component was added and dispersed. The above-mentioned aqueous phase was added to the oil phase / powder and emulsified by an emulsifier. This emulsion was cooled to a final temperature of 30 ° C. with a heat exchanger to obtain a liquid emulsion foundation (Product 1 of the present invention). In addition, products 2 and 3 of the present invention and comparative products 1 to 6 were obtained in the same manner as the product 1 of the present invention except that the blending components were changed.

1): ○; no separation and aggregation Δ: separation and aggregation slightly ×; separation and aggregation 2): milky liquid; 5 g of a sample placed in a 10 ml sample bottle;

 Creamy; does not flow under the same conditions.

3): Practical evaluation by 10 specialized panels ○: 7 or more of 10 panelists answered that they were good △; 4 to 6 of 10 panelists answered that they were good ×; 3 or less of 10 panelists answered that they were good As is clear from Table 3, products 1 to 3 of the present invention are comparative products 1 to 3.
As compared with Comparative Example No. 6, the stability was good, and the appearance immediately after the preparation was in the form of milky liquid.

Example 2 A liquid emulsified foundation (Product 4 of the present invention) was obtained in the same manner as in Example 1 except that the above components were used.

Example 3 A liquid emulsified foundation (Product 5 of the present invention) was obtained in the same manner as in Example 2 except that hexaglyceryl pentaoleate was changed to sorbitan trioleate.

Example 4 A liquid emulsified foundation (Product 6 of the present invention) was obtained in the same manner as in Example 2 except that hexaglyceryl pentaoleate was changed to glyceryl monoisostearate.

Example 5 A liquid emulsified foundation (Product 7 of the present invention) was obtained in the same manner as in Example 1 except that the above components were used.

Example 6 Same as Example 5 except that decaglyceryl heptaoleate was changed to glyceryl monoisostearate.
A liquid emulsified foundation (Product 8 of the present invention) was obtained.

Example 7 A liquid emulsified foundation (Product 9 of the present invention) was obtained in the same manner as in Example 5 except that decaglyceryl heptaoleate was changed to sorbitan isostearate.

Example 8 A liquid mascara (Product 10 of the present invention) was obtained in the same manner as in Example 1 except that the above components were used.

Example 9 A liquid mascara (product 11 of the present invention) was obtained in the same manner as in Example 8, except that decaglyceryl pentaoleate was changed to glyceryl monooleate.

Example 10 A liquid mascara (product 12 of the present invention) was obtained in the same manner as in Example 8 except that decaglyceryl pentaoleate was changed to sorbitan monooleate.

The products 4 to 12 of the present invention prepared in Examples 2 to 10 were all low-viscosity emulsions, and were water-in-oil type emulsified cosmetics excellent in stability and feeling in use.

Continuation of the front page (56) References JP-A-56-39005 (JP, A) JP-A-1-168606 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61K 7 / 00,7 / 02

Claims (1)

(57) [Claims] 1. The following components (A) to (G): (A) 15 to 55% by weight of an oily base; (B) a lipophilic nonionic surfactant selected from glycerin fatty acid esters, polyglycerin fatty acid esters and sorbitan fatty acid esters. 0.2 to 10% by weight (C) Nonionic surfactant having higher hydrophilicity than component (B) 0.1 to 10% by weight (D) Polyvalent metal salt of saturated or unsaturated fatty acid having 10 to 22 carbon atoms 0.01 (E) an inorganic salt or an organic acid salt having a solubility in water at 20 ° C. of 0.2 g / 100 g water or more 0.05 to 5% by weight (F) an aqueous medium 34 to 74% by weight (G) surface water-repellent treatment An emulsion-type water-in-oil type emulsified cosmetic, comprising 10 to 50% by weight of a cosmetic pigment.