JPH06287128A - Emulsion cosmetic for moisture retention - Google Patents

Abstract

PURPOSE:To provide an emulsion cosmetic containing an oily component such as lanolin, a specified compound for improving stickiness, an inorganic salt and a surfactant, excellent in moisture retention and compatibility to the skin, free from stickiness and exhibiting an excellent feeling in use. CONSTITUTION:This emulsion cosmetic contains 5.0 to 50.0wt.% oily component such as vaseline, lanolin or stearic acid, 0.05 to 25.0wt.% one or more kinds of compounds represented by the formula (R<1> is a 11 to 21C alkyl; R<2> and R<3> are each an ester composed of cholesterol, behenyl alcohol, octyldodecanol and their mixture alcohols), 0.01 to 10.0wt.% inorganic salt such as CaCl2 or NaCl and 0.05 to 10.0wt.% surfactant such as a glycerin fatty acid ester. As the compound of the formula, e.g. N-lauroyl-L-glutamic acid dicholesterol ester and N-myristoyl-L-glutamic acid dicholesterol ester are exemplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisturizing emulsified cosmetic applied to the skin.

2. Description of the Related Art One of the important purposes of using basic cosmetics is a moisturizing effect on the skin. The basic cosmetics used for such purposes are used to moisturize the skin and create a youthful, tense skin, and occupy a major position of the basic cosmetics as moisturizing cosmetics. By the way, such moisturizing cosmetics contain a high concentration of oil in order to prevent the evaporation of water from the skin surface, form a film with these oils on the skin, and allow these oils to penetrate into the skin, It was the one to obtain the moisturizing effect of. However, such cosmetics have a problem of stickiness on the skin due to the oil content, and a large amount of oil content is one of the causes of skin irritation. In order to compensate for such defects, hygroscopicity
Highly moisturizing substances such as sodium hyaluronate, PCA
A moisturizing cosmetic product containing a large amount of a substance such as Na has been developed. Such substances have a high moisturizing effect, but are very expensive, so that the practical compounding amount is limited, and a sufficient effect cannot be obtained. There are also cosmetics containing inexpensive urea as a substance having the same effect, but urea has a drawback that it gradually decomposes to produce ammonia, which adversely affects the odor and color tone of the product.

[0002]

[Means for Solving the Problems] In the present application, various studies were conducted for the purpose of producing a non-greasy cosmetic composition while blending an oil component having a high moisturizing effect.
0 to 50.0% by weight, and (b) 0.05 to 25.0% by weight of one or more compounds of the structural formula consisting of the following:

[Chemical 2] (R1: C11 to C21 straight chain unsaturated and saturated alkyl. R2, R3: cholesterol, behenyl alcohol,
An ester group consisting of octyldodecanol and a mixed alcohol thereof. ) (C) Inorganic salts of 0.01-10.
0% wt% and (d) surfactant 0.05-10.0
The present invention has been completed by finding that an emulsion composition composed of 10% by weight has a high moisturizing property and has a good feeling of use without stickiness.

Each component will be described in detail below. The (a) oil used in the present invention is not particularly limited as long as it forms a film on the skin and has a softening effect by penetrating into the skin, and oils usually used in cosmetics can be used. Of these, preferred oils are, for example, liquid paraffin, squalane, petrolatum, lanolin, glycerin triisostearate, macadamian nut oil, olive oil, soybean oil, methylpolysiloxane, stearic acid hydrocarbons, fats, waxes, silicones, One or more kinds of fatty acids and the like, and particularly preferable oil components are petrolatum, lanolin and stearic acid. The blending amount of these oil components is 5.0 to 50.0% by weight, preferably 1
It is 0.0 to 30.0% by weight. If it is 5.0% by weight or less, the moisturizing effect is not sufficient, and if it is added in an amount of 50% by weight or more, the effect does not change.

The component (b) used in the present invention is represented by the above formula (2).
The compound represented by the formula (1), or a mixture of one or more of these compounds in an amount of 0.05 to 25.0% by weight. By the compounding of the present compound, stickiness is greatly improved and usability is improved. If the compounding amount of this compound is 0.05% by weight or less, the stickiness preventing effect is not sufficient, and even if it is blended in an amount of 25.0% by weight or more, the sticking preventing effect is not improved as compared with the compounding amount. It's useless. The compounding amount of this compound is preferably 1.0 to 10.0% by weight. Further, it is desirable to add 2.0 to 85.0% of the total amount of oil.

The inorganic salt which is the component (c) of the present invention is an inorganic salt which can be usually blended in cosmetics, and preferred examples of such inorganic salt are chlorides of potassium, calcium, sodium, magnesium and aluminum. Substances, sulfates, phosphorus oxides, bromides, etc., for example,
Potassium chloride, magnesium chloride, sodium chloride, calcium chloride, ammonium chloride, potassium sulfate, magnesium sulfate, sodium sulfate, calcium sulfate, ammonium sulfate, potassium phosphate, magnesium phosphate,
Examples thereof include sodium phosphate, calcium phosphate, ammonium phosphate, potassium bromide, magnesium bromide, sodium bromide, calcium bromide, ammonium bromide and the like. Further, these aqueous solutions may be used, or one kind or a mixture of two or more kinds thereof may be used. Examples of such substances include rock salt and seawater.

The component (d) of the composition of the present application is a surfactant for emulsifying the composition of the present application, and an emulsifier usually used in cosmetics can be used. Since the present application is an emulsion containing inorganic salts, the preferred surfactant is a nonionic surfactant, and examples thereof include sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and polyoxyethylene. Glycerin fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene phytosterol, phytostanol, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene castor oil, poly Oxyethylene lanolin, lanolin alcohol, beeswax derivatives, polyoxyethylene alkylamines, fatty acid amides, polyoxyethylene Emissions alkylphenyl formaldehyde condensates, polyoxyethylene alkyl ether and the like. Of these, particularly preferred are glycerin fatty acid ester and polyoxyethylene sorbitan fatty acid ester. You may use these activators in mixture of 2 or more types. The blending amount of these surfactants is 0.05 to 10.0% by weight, preferably 1.5 to 5.0% by weight.

In the present invention, the components used in cosmetics and pharmaceuticals can be appropriately incorporated. For example, thickeners, neutralizers,
Preservative, bactericide, antioxidant, powder component, pigment, fragrance,
Examples include ultraviolet absorbers, sequestering agents, and pH adjusters. Further, as the emulsified cosmetic composition according to the present invention, emulsions, creams, foundations, and similar emulsion type dosage forms can be used.

[0008]

The present invention will be described with reference to the following examples.

[0009]

[Table 1]

Manufacturing method: Phases A and B are preheated and uniformly mixed, and then both are mixed and uniformly dispersed, and then packed in a container to obtain a product. Evaluation: Examples 1 to 4 and 1 to Comparative Examples shown in Table 1
The following tests are performed on the 4 samples. The subjects are 12 people who complain of dry skin. 1 day in 2 days for any dryness per cream sample
A long-term continuous use test (3 months) of repeated application was performed.

Evaluation Criteria (1) Moisturizing sensation A: Examples 10 to 12 that felt moisturizing sensation B: Examples that felt moisturizing sensation 7 to 9 C: Examples that felt moisturizing sensation 4 to 6 D : Example of feeling moisturizing 3 or less (2) Stickiness A: Example of feeling no stickiness 10-12 B: Example of feeling no stickiness 7-9 C: Example of feeling no stickiness 4-6 D : Example 3 when I felt no stickiness

As is clear from the above results, the results of the present invention show that even though the moisturizing sensation is obtained, no stickiness is observed even after continuous evaluation for 3 months, and the difference from the comparative example is clear. Is.

[Example 5: Cream] Ingredients Amount (wt%) Stearic acid 3.0 Vaseline 25.0 Dimethylpolysiloxane 3.0 Monoglycerin stearate 2.0 Hexaglycerin monolaurate 2.0 N-lauroyl- L-glutamic acid dicholesterol ester 0.5 N-lauroyl-L-glutamic acid dibehenyl ester 1.5 N-lauroyl-L-glutamic acid dioctyldodecyl ester 0.5 potassium hydroxide 0.3 sodium chloride 5.0 seawater 5.0 purified water The rest was emulsified by a conventional method to make a cream.

[Example 6: Emulsion] Ingredients Amount (wt%) Stearic acid 3.0 Olive oil 10.0 Dimethylpolysiloxane 3.0 POE (20) Sorbitan monostearate 2.0 Monoglyceryl stearate 2.0 N-lauroyl-L-glutamic acid dicholesterol ester 0.5 N-lauroyl-L-glutamic acid dibehenyl ester 1.5 N-lauroyl-L-glutamic acid dioctyldodecyl ester 0.5 potassium hydroxide 0.3 sodium chloride 5.0 seawater 20. 0 Carboxyvinyl polymer 0.01 Purified water balance Emulsification was carried out by a conventional method to prepare an emulsion.

[Example 7: Foundation] Ingredients Amount (wt%) Titanium oxide 5.0 Talc 5.0 Mica 3.0 Stearic acid 3.0 Squalane 3.0 Dimethylpolysiloxane 3.0 POE (20) sorbitan Mono stearate 2.0 N-lauroyl-L-glutamic acid dicholesteryl ester 0.5 N-lauroyl-L-glutamic acid dibehenyl ester 0.8 N-lauroyl-L-glutamic acid dioctyldodecyl ester 0.5 Potassium hydroxide 0.3 Sodium chloride 2.5 Potassium chloride 2.5 Seawater 20.0 Sodium hyaluronate 0.1 Purified water Remainder Emulsification was carried out by a conventional method to make a foundation.

[0016]

The emulsified cosmetic composition according to the present invention has a moisturizing effect and is well adapted to the skin, and is non-greasy and has a good feeling in use.

Claims (2)

[Claims] 1. The present invention comprises (a) an oil content of 5.0 to 50.0.
%, And 0.05 to 25.0% by weight of one or more of the compounds (b) having the structural formulas below: (R1: C11 to C21 straight chain unsaturated and saturated alkyl. R2, R3: cholesterol, behenyl alcohol,
An ester group consisting of octyldodecanol and a mixed alcohol thereof. ) (C) Inorganic salts of 0.01-10.
0% wt% and (d) surfactant 0.05-10.0
An emulsified composition consisting of 10% by weight. 2. An inorganic salt is a chloride composed of potassium, calcium, sodium, magnesium and aluminum,
The emulsified composition according to claim 1, which is one or more inorganic salts of sulfates, phosphorus oxides and bromides.