JPH03284608A - Emulsified cosmetic of water-in-oil type - Google Patents

Abstract

PURPOSE:To obtain the subject cosmetic having excellent using feeling, high safety and good stability with time comprising an oily haze agent containing a silicone coil, water and a specific emulsifier. CONSTITUTION:(A) An oily base agent containing a silicone oil is contained in the aimed emulsified cosmetic of water-in-oil type together with (B) water and (C) an emulsifier composed of C1:15-35wt.% alpha-monoglyceryl ether expressed by formula I (R<1> is 10-24C alkyl or 10-24C alkenyl), C2:20-70wt.% dimethylpolysiloxane polyoxyalkylene copolymer expressed by formula II [R<2> is expressed by formula III (R<3> is H or 1-12C alkyl; p is 1-5; a and b are averaged values as 0-35); m and n are averaged values as m=1-200 and n=0-50], C3:1-20wt.% salt of multivalent metal of 10-20C saturated or unsaturated fatty acid and C4:5-50wt.% inorganic salt or organic salt having >=0.2g/100g solubility in water. Mixing amount of the component C is preferably 0.5-20wt.%, especially 1-10wt.%.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a water-in-oil emulsified cosmetic, more specifically, it is composed of a specific emulsifier mixture, an oily base containing silicone oil, and water, and which has a pleasant texture when used. This invention relates to an excellent water-in-oil emulsion cosmetic that is highly safe and has good stability over time.

[Problems to be solved by conventional techniques and inventions] Conventionally,
Water-in-oil emulsified cosmetics have higher microbial resistance than oil-in-water emulsified cosmetics, and they also form an oil film on the skin surface to prevent water evaporation, and are highly water-repellent and do not cause makeup to come off easily, making them popular as skin care products. It is widely used in make-up products. However, the disadvantage of water-in-oil emulsified cosmetics is that since the oil phase is a continuous phase, the amount of water that can be stably contained in it is limited, resulting in a strong oily or sticky feeling when applied. This can be mentioned. As a solution to this problem, a water-in-oil cosmetic containing a high moisture content using a mixed emulsifier such as α-monoglyceryl ether has been disclosed (Japanese Patent Publication No. 26366/1983). The entire system has a high viscosity in order to keep a large amount of water stable, and although it does not have an oily or sticky feel, it has the disadvantage of being difficult to spread.

On the other hand, silicone oil is known as an oily base with excellent lubricity and water repellency, and volatile silicone in particular has been widely used in recent years because it spreads well when applied and does not easily cause makeup to come off. However, it has the disadvantage that it is extremely difficult to obtain a highly stable water-in-oil emulsion cosmetic based on silicone oil.

Therefore, there has been a strong demand for a water-in-oil emulsion cosmetic that spreads easily, has excellent stability, and contains a large amount of water.

[Means to solve the problem]

As a result of intensive studies under these circumstances, the present inventors have found that by creating a water-in-oil emulsion using an oil base containing silicone oil and water using a specific emulsifier mixture, the present inventors have found that they have improved stability over time and are safe. The present invention was completed based on the discovery that a water-in-oil emulsion cosmetic with good properties and an excellent feel during use can be obtained.

That is, the present invention provides a water-in-oil emulsified cosmetic containing an oily base containing silicone oil, water, and an emulsifier, in which the emulsifier has the following components [1] to (4) (1) general formula (I): R 'OCH, CHCH2011 (1) α represented by Kano (in the formula, R' represents a straight or branched alkyl group or alkenyl group having 10 to 24 carbon atoms)
-monoglyceryl ether 15 to 35% by weight (2) General formula (■): [In the formula, R'Lt group R3 ([lC', L) b ((I
C, l(,), 0(CL) p-(R' is a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, the number of pif1 to 5, a and b are average values, and each of θ to 35 ), m and n are average values, m is a number from 1 to 200, n
represents the number of θ to 5o], and the molecular weight is 2.00
0 to 50.000, of which R2 accounts for 5 to 40%, 20 to 70% by weight of a dimethylpolysiloxane polyoxyalkylene copolymer (3) A saturated or unsaturated fatty acid having 10 to 22 carbon atoms. Polyvalent metal salt 1-20% by weight (4) Solubility in water is 0.2 g/100 at 20°C
The present invention provides a water-in-oil emulsion cosmetic comprising 5 to 50 weight percent of an inorganic salt or an organic acid salt of water or more.

The silicone oil used in the present invention may be any silicone oil that is normally used in cosmetics, such as dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrodienepolysiloxane, etc. In order to reduce sexual sensation and sticky feeling, volatile dimethylpolysiloxane, dimethylcyclopolysiloxane, etc. can be exemplified as preferred. These can be used alone or in combination of two or more. Other oil bases include hydrocarbons such as squalane, liquid paraffin, and petrolatum; waxes such as spermaceti wax and carnauba wax; ester oils such as jojoba oil, octyldodecyl myristate, and neopentyl glycol dioctoate; olive oil, Natural animal and vegetable oils and fats such as macadamia nut oil; diglycerides, and the like.

The oil base is preferably blended in an amount of 25 to 45% by weight based on the total amount of the cosmetic.

Among the four components of the emulsifier, component (1), α-monoglyceryl ether, in formula (I), R1 is a lauryl group,
Straight alkyl groups such as myristyl group, cetyl group, stearyl group, eilcyl group, tocosyl group; straight alkenyl group such as oleyl group, 5.7.7-) 'J methyl-2
- (1,3,3-)limethylbutyl)octyl group, 2
-hebutylundecyl group, 2-hexyldecyl group, 2-
Examples include branched alkyl groups having a side chain at the β position such as octyldodecyl group. Among these, those in which R1 is a straight alkenyl group or a branched alkyl group having 16 to 22 carbon atoms are particularly preferred. α-Monoglyceryl ether (I) can be used alone or in combination of two or more.

The dimethylpolysiloxane polyoxyalkylene copolymer (n) of component (2) can be used alone or in combination of two or more types, but in general formula (II), m is 50 to
80, n is 0-2, a is 9-10, b is 0, p is 3, R
3 is a hydrogen atom, or m is 90-110, n
is 0, a is 11 to 13, b is OSp is 3, and R3 is a hydrogen atom.

The polyvalent metal salt of the fatty acid of component (3) is preferably one having 12 to 18 carbon atoms, and examples of these salts include salts of calcium, magnesium, zinc, aluminum, etc. Aluminum salts are preferred. Therefore, preferred examples of fatty acid polyvalent metal salts include aluminum monostearate, aluminum distearate, aluminum monooleate, aluminum monopalmitate, and aluminum monolaurate.

Inorganic salts or organic acid salts of component (4) 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; carboxylic acids such as formic acid, acetic acid, and sorbic acid; Alternatively, alkali metal salts, alkaline earth metal salts, or aluminum salts of aromatic carboxylic acids such as salicylic acid and benzoic acid may be mentioned.

Specific examples of preferred inorganic salts or organic 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, 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 Examples thereof include sodium, potassium benzoate, sodium benzoate, and particularly preferred are potassium sulfate, magnesium sulfate, potassium chloride, magnesium chloride, aluminum chloride, sodium citrate, sodium tartrate, potassium sorbate, sodium salicylate, and sodium benzoate.

These inorganic salts or organic acid salts may be incorporated into cosmetic compositions in the form of salts; however, when producing cosmetics, the corresponding acidic and basic substances must be mixed at the stoichiometry required to form the salt. It may be manufactured by adding the desired amount.

These components (1) to (4) are each contained in an emulsifier.
1): 15-35% by weight, component (2): 20-70
Weight%, component (3): 1 to 20% by weight, component (4); 5
It is blended in a proportion of ~50% by weight, but more preferably component (1): 20~30% by weight, component (2) = 40~
60% by weight, component (3): 1-10% by weight, component (
4) + 10 to 20% by weight is blended.

Emulsifier (component (1)) in the water-in-oil emulsified cosmetic of the present invention
) to (4)) are blended in an amount of 0.5 to 2% of the total amount of cosmetics.
0% by weight, especially 1-10% by weight is preferred.

If it is less than 0.5% by weight, the water-in-oil emulsified cosmetic of the present invention cannot be stabilized, and if it exceeds 20% by weight, the viscosity of the entire system becomes extremely high, it is difficult to spread during use, and the water-in-oil emulsion cosmetic of the present invention cannot be stabilized. It is not preferred as a cosmetic because it gives a sexual and sticky feeling.

In addition, water can be blended in any amount, but in order to have a good feeling of use, i.e., less oily or sticky feeling and good spreadability, the total amount of water with other water-soluble solvents must be 34 to 74%. It is preferable to mix % by weight, especially 50% by weight or more.Here, other water-soluble solvents include ethanol, glycerin, sorbitol, propylene glycol, 1.
Refers to lower alcohols or polyols such as 3-butylene glycol.

The water-in-oil emulsified cosmetic composition of the present invention may further contain 0 to 40% by weight of other components commonly used in cosmetic compositions, as appropriate, within a range that does not impair the effects of the present invention. Other ingredients include powder, moisturizing agents, intercellular lipids (ceramides, etc.), ultraviolet absorbers, alcohols, chelating agents, PL
Conditioners, preservatives, thickeners, pigments, fragrances and the like can be mentioned.

By blending 10 to 40% by weight, preferably 15 to 30% by weight, of these powders in cosmetics, a liquid or cream foundation can be obtained.

Examples of powders include powders commonly used in cosmetics, such as extender pigments such as talc, mica, kaolin, and sericite;
Inorganic pigments such as titanium oxide, zinc oxide, iron oxide, ultramarine; titanium-mica pearl pigments; and Blue No. 404 and Red 20
Examples include organic pigments such as No. 2 and Yellow No. 401. In the present invention, one or more of the above powders may be arbitrarily selected and used.

Cosmetics to which the present invention is applied include, for example, creams and emulsions such as face care creams or emulsions, hand and body care creams or emulsions, and liquid or cream type foundations. These are prepared from the above ingredients according to conventional methods.

〔Effect of the invention〕

As mentioned above, the wood-in-oil emulsion cosmetic of the present invention has the advantages of conventional water-in-oil emulsion cosmetics, and also spreads easily, has little oily or sticky feeling, and has a long-lasting cosmetic effect. It is a cosmetic with excellent properties.

〔Example〕

The present invention will be explained in more detail with reference to Examples below.
The present invention is not limited to these examples.

Example 1 (Face care emulsion) A face care emulsion having the composition shown in Table 1 below was produced, and its emulsion stability, viscosity, and feeling of use were evaluated.

Table 1 Below margin *: Polyoxyalkylene group 15%, average molecular weight 9.0
00 [In formula (n,), a = 11 to 13, b = o, m =
90-110, n=0°p=3, R3=H] (Production method) Magnesium sulfate, methylparaben and glycerin were added to purified water and heated, and the aqueous phase was maintained at 70°C. On the other hand, the remaining components were dissolved by heating, and this oil phase was also heated to 70°C. Next, the aqueous phase was added to this oil phase and emulsified using an emulsifier. The emulsion was cooled to a final temperature of 30° C. using a heat exchanger to obtain a face care emulsion (invention product 1). Also,
Comparative products 1 and 2 were obtained in the same manner as in the production of inventive product 1 except that the ingredients were changed.

(Evaluation) The face care emulsions of the present invention product 1 and comparative products 1 and 2 were evaluated as -
The product was left in a constant temperature bath at 5°C, room temperature, and 40°C, and its appearance was observed after 2 months and judged according to the following criteria. The results are shown in Table 2.

○; No separation or aggregation △; Slightly present
The stability was better than that of .

Example 2 (Body care emulsion) Oil phase components: Weight % Liquid isoparaffin 3.0 Dimethylpolysiloxane (Ilics) 5.0 Octamethylcyclotetrasiloxane 20.0 Spherical polymethylsilsesquioxane 2.0 α-monooleyl Glyceryl ether 1.0 Dimethylpolysiloxane polyoxyalkylene copolymer umbrella 1.5 Aluminum monostearate 0. l Water phase components: Magnesium chloride 0.4 Glycerin 2.0 Veegum
0.5 methylparaben
0.1 fragrance
0.1 ethanol 5.0
*: 20% polyoxyalkylene group.

Average molecular weight 7.000 [In formula (n), n = 9 to 10, b = o, m = 50 to 80
, n=0-2, p=-3, R''=H'J The above aqueous phase components were heated and mixed and maintained at 70°C.

The above oil phase was similarly heated and dissolved and dispersed at 70°C. The above water phase was added to this oil phase and emulsified using an emulsifier. The emulsion was cooled to a final temperature of 30° C. using a heat exchanger to obtain a body care emulsion (invention product 2).

Example 3 (hand cream) Oil phase component; liquid paraffin Methylphenylpolysiloxane Tecamethylcyclopentasiloxane weight% 10.0 5.G 15.0 Dimethylpolysiloxane polyoxy Alkylene copolymer 0 0.5 Dimethylpolysiloxane polyoxy Alkylene copolymer O aluminum monooleate Valmitic acid dextrin Water phase components: potassium sulfate glycerin Sorbitol 70% aqueous solution Methylparaben fragrance 1.0 1.0 1.0 2.5 10.0 15.0 0, 1 0, 1 Total 100.0 *: Same as Example 1 **: 10% polyoxyalkylene group.

Average molecular weight 13.000 [In formula (II), n = 9 to 10, b = o, m = 15 [1
~170, n = lO1p = 3, R'' = H] A hand cream (invention product 3) was obtained in the same manner as in Example 2 except for using the above ingredients.

Example 4 (Suncare lotion) Oil phase components: wt% dimethylpolysiloxane (6cs) 10.0 decamethylcyclopentasiloxane 20.0 aluminum monostearate 0.2 octyl methoxycinnamate
3.0 Oxybenzone
0.5 Water composition: Sodium citrate 0.7 Glycerin 2.0 1.3-Butylene glycol 2.0 Methylparaben
0.1 Fragrance 0.1 Purified water Balance powder ingredients (
Hydrophobization treatment): Total 100.0*: 15% polyoxyalkylene group.

Average molecular weight 8.500 [In formula (n), n = 9 to 10, b = 0, m = 6 (1
~90, n=0-2, p=3, R'=H] The above aqueous phase components were heated and mixed and maintained at 70°C.

The oil phase was similarly heated and dissolved at 70°C, and then the powder component was added and dispersed. The above water phase was added to this oil phase/powder and emulsified using an emulsifier. The emulsion is heated to a final temperature of 3 using a heat exchanger.
It was cooled to 0°C to obtain a sun care lotion (product 4 of the present invention).

Example 5 (Liquid emulsion foundation) Oil phase component 2
wt% squalane
4.0 dimethylpolysiloxane (6cs
) 5.0 Neopentyl glycol dioctoate 3.0 Decamethylcyclopentasiloxane 3.0 Aluminum distearate Water phase component: Magnesium sulfate glycerin Methyl paraben Fragrance Purified water Powder component (hydrophobization treatment) Titanium dioxide sericite Talc red iron yellow Iron oxide 0.2 0.7 3.0 0, 1 0.1 Balance 5.0 2.0 3.0 0.4 0.7 Total 100.0 *: Same as Example 1 except for using the above components A liquid emulsion foundation (invention product 5) was obtained in the same manner as in Example 4.

Products 2 to 5 of the present invention prepared in Examples 2 to 5 were all water-in-oil emulsion cosmetics with excellent stability and feel in use.

that's all

Claims (1)

[Claims] 1. A water-in-oil emulsified cosmetic containing an oily base containing silicone oil, water and an emulsifier, in which the emulsifier contains the following components (1)
)~(4) (1) General formula (I): ▲Mathematical formulas, chemical formulas, tables, etc.▼(I) (In the formula, R^1 is a straight or branched alkyl group having 10 to 24 carbon atoms or 15 to 35% by weight of α-monoglyceryl ether (representing an alkenyl group) (2) General formula (II): ▲There are numerical formulas, chemical formulas, tables, etc.▼(II) ^3(OC_3H_6)_b(O
C_2H_4)_aO(CH_2)_p-(R^3 is a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, p is 1 to
5, a and b are average values, each represents a number from 0 to 35), m and n are average values, m represents a number from 1 to 200, and n represents a number from 0 to 50. ] Dimethylpolysiloxane polyoxyalkylene copolymer 2, which is represented by and has a molecular weight of 2,000 to 50,000, of which R^2 accounts for 5 to 40%.
0 to 70% by weight (3) 1 to 20% by weight of a polyvalent metal salt of a saturated or unsaturated fatty acid having 10 to 22 carbon atoms (4) Solubility in water is 0.2g/100g at 20°C
A water-in-oil emulsion cosmetic comprising 5 to 50% by weight of an inorganic salt or an organic acid salt of water or more.