JPH08183727A - Emulsified cosmetic - Google Patents

Abstract

PURPOSE: To obtain an emulsified cosmetic reduced in the tacky touch of a water-soluble polyhydric alcohol, excellent in the moisture-retaining effect, and having good usage touch and good stability. CONSTITUTION: In the emulsified cosmetic containing a water-soluble polyhydric alcohol, (A) 0.3-5wt.% of lecithin and (B) 0.3-20wt.% of a polyoxyalkylene diglycidyl ether are contained at a (A)/(B) of 1/0.1 to 1/20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emulsified cosmetic composition which has an excellent moisturizing effect and is excellent in usability and stability over time.

[0002]

2. Description of the Related Art In order to prevent the skin from becoming dry and rough due to drying, various cosmetics such as emulsions and creams and external preparations for the skin for the purpose of moisturizing are commercially available. These supply proper amount of water to the skin or keep the moisture without letting the water escape so that the water in the skin is properly maintained and healthy skin is maintained. Traditionally, various aqueous components and oil components have been studied to improve the moisturizing effect,
The water-soluble polyhydric alcohol has been widely used as a raw material for cosmetics because it has excellent moisturizing properties.

[0003]

However, although the water-soluble polyhydric alcohol has a good moisturizing effect and is excellent in improving the dryness and roughness of the skin, on the other hand, it causes a sticky feeling. Became remarkable and was not preferable in terms of sensory characteristics as a cosmetic.
On the other hand, lecithin can be mentioned as a surfactant having a moisturizing ability, but an emulsion cosmetic containing this is not sufficiently stable with time and has a drawback such as separation in a high temperature range. Therefore, it has been a subject to provide a cosmetic having good organoleptic properties and stability in which a sticky feeling is suppressed without reducing the moisturizing effect.

[0004]

Means for Solving the Problems In view of the above circumstances, the present inventors have earnestly studied, and as a result, by using a water-soluble polyhydric alcohol and a specific component in combination, an excellent moisturizing effect and no sticky feeling were obtained. It was found that an emulsified cosmetic having a good feeling and stability of use can be obtained, and the present invention has been completed. That is, the present invention uses a water-soluble polyhydric alcohol in an amount of 5 to 4
In the emulsified cosmetic containing 0% by weight, the following component (A)
And (B); (A) lecithin 0.3 to 5% by weight (B) polyoxyalkylene diglyceryl ether
0.3 to 20% by weight, and the weight ratio of (A) and (B) is 1: 0.1.
The present invention provides an emulsified cosmetic characterized by being 1:20. The details will be described below.

The water-soluble polyhydric alcohol used in the present invention includes glycerin, 1,3-butylene glycol,
Propylene glycol, diglycerin, dipropylene glycol, maltitol, mannitol, sorbitol, xylitol and the like can be mentioned. These water-soluble polyhydric alcohols are blended in an amount of 5 to 40% by weight (hereinafter, simply indicated by "%"). If it is 5% or less, the moisturizing effect is not sufficient, and if it exceeds 40%, the sticky feeling cannot be reduced even if the specific components described later are used together.

Examples of the component (A) lecithin used in the present invention include phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol,
Examples include phosphatidylserine, diacylester type glycerophospholipids such as phosphatidic acid, lysophosphatidylcholine, lysophosphatidylethanolamine, monoacylester type glycerophospholipids such as lysophosphatidylinositol, naturally derived lecithin such as soybean and egg yolk, or hydrogenated products thereof. These can be used alone or in combination of two or more. Among these, one or more selected from hydrogenated soybean lecithin, hydrogenated egg yolk lecithin, hydrogenated phosphatidylcholine and hydrogenated phosphatidylserine are preferable.

The blending amount of the component (A) is 0.3 to 5%, more preferably 0.5 to 4%. If it is less than 0.3%, sufficient emulsion stability cannot be obtained, and it is 5%.
If added in excess of the above range, the odor and coloring of lecithin itself will occur.

The component (B), polyoxyalkylene diglyceryl ether, is obtained by addition-polymerizing ethylene oxide or propylene oxide to diglycerin. Of these, the number of added moles of propylene oxide is 5 to 5
More preferred is 30 moles of propylene oxide diglyceryl ether. As a commercial product, Pristol DG
P-09 (made by Miyoshi Yushi Co., Ltd.), Savondol GP-
9 (manufactured by NOF CORPORATION), SY-DP9, SY-DP14
(Made by Sakamoto Yakuhin Kogyo Co., Ltd.) and the like.

The blending amount of the component (B) is 0.3 to 20%, more preferably 0.5 to 15%. If it is less than 0.3%, the tackiness of the water-soluble polyhydric alcohol cannot be reduced, and if it is more than 20%, the component (B) itself feels slimy and the usability deteriorates.

The emulsified cosmetic composition of the present invention contains the above-mentioned specific amounts of the components (A) and (B), and the weight ratio of (A) to (B) is 1: 0.1 to 1:20. Is mandatory. When the weight ratio of the component (B) to the component (A) is less than 0.1 in each of the specific amounts described above, sufficient stability over time, particularly in a high temperature range, cannot be obtained, and the weight ratio is the same. When it exceeds 20, a good emulsion cannot be obtained.

In the emulsified cosmetic composition of the present invention, in addition to the above-mentioned essential components, components that are usually blended in the cosmetic composition, such as oils, surfactants, powders, water-soluble polymers, ultraviolet absorbers,
Preservatives, colorants, fragrances, cosmetic ingredients and the like can be added within a range that does not impair the effects of the present invention.

[0012]

The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto.

Examples 1 to 5 and Comparative Examples 1 to 5 Emulsions Emulsions having the components shown in Table 1 were prepared and evaluated for their moisturizing effect, lack of stickiness and emulsion stability.

[0014]

[Table 1]

(Production Method) A: Components 1 to 5 are heated and dissolved. B: Components 6 to 10 and 13 are melted by heating, added to A and emulsified and mixed. After cooling C: B, components 11 to 12 were added and mixed uniformly to obtain an emulsion.

(Evaluation method) 1. Moisturizing effect and lack of stickiness Using 10 professional evaluation panels, the use test of the above emulsion was carried out and a sensory evaluation of 5 levels was performed. Furthermore, the evaluation points were averaged and judged. The evaluation criteria are shown below. (Judgment) A: 4.5 points or more. Good: 3.5 points or more and less than 4.5 points. Δ: 2.5 points or more and less than 3.5 points. X: less than 2.5 points.

2. Emulsion Stability Each of the above emulsions was left in a constant temperature bath at 40 ° C., and the stability after 1 month was visually evaluated. The evaluation criteria are shown below. (Evaluation) A: Very good. ◯: Good. Δ: There is a tendency for separation. X: Clearly separated. The evaluation results are shown in Table 2.

[0018]

[Table 2]

As is clear from the above evaluation results, Examples 1 to 5 according to the present invention satisfied all the evaluation items of the moisturizing effect, lack of stickiness and emulsion stability. On the other hand, in Comparative Examples 1 to 5, none satisfying all the evaluation items was obtained.

Example 6 Whitening lotion (component) (%) 1. Polyoxyethylene monooleate 0.5 sorbitan (20 EO) 1. Hydrogenated egg yolk lecithin 0.5 3. Refined olive oil 1.0 4. Perfume proper amount 5. Preservative proper amount 6. Glycerin 5.0 7. Ethanol 10.0 8.1, 3-butylene glycol 5.0 9. Polyoxypropylene diglyceryl 3.0 ether (14 PO) 10. Citric acid 0.02 11. Sodium citrate 0.1 12. Purified water Remaining amount

(Production Method) A: Components 1 to 7 are uniformly mixed and dissolved. B: Components 8 to 12 are uniformly mixed and dissolved. C: A is added to B and emulsified and mixed to obtain a lotion. Example 6 was a lotion having good stability and an excellent moisturizing effect.

Example 7 Cream (ingredient) (%) 1. Stearic acid 3.0 2. Squalane 20.0 3. Vaseline 5.0 4. Beeswax 1.0 5. Cetanol 5.0 6. Hydrogenated phosphatidylcholine 1.5 7. Polyoxyethylene monooleate 0.5 sorbitan (20 EO) 8.1,3-butylene glycol 15.0 9. Glycerin 5.0 10. Polyoxypropylene diglyceryl 1.5 ether (9 PO) 11. Carboxyvinyl polymer 0.1 12. Triethanolamine 1.0 13. Preservative appropriate amount 14. Perfume proper amount 15. Purified water Remaining amount

(Manufacturing Method) A: Components 1 to 7 are dissolved by heating to 70 ° C. B: Components 8 to 13 and 15 are dissolved by heating to 70 ° C. C: B is added to A, the mixture is emulsified and mixed, then cooled, and the component 14 is added and mixed to obtain a cream. Example 7 was a cream with no stickiness and an excellent moist feeling.

[0024]

The emulsified cosmetic composition of the present invention suppresses the sticky feel of the water-soluble polyhydric alcohol, has an excellent moisturizing effect, and has good usability and stability.

Claims (3)

[Claims] 1. A cosmetic containing 5 to 40% by weight of a water-soluble polyhydric alcohol, which comprises the following components (A) and (B): (A) lecithin 0.3 to 5% by weight (B) polyoxyalkoxy. Range glyceryl ether
0.3 to 20% by weight, and the weight ratio of (A) and (B) is 1: 0.1.
An emulsified cosmetic characterized by being 1:20. 2. The component (A) comprises hydrogenated egg yolk lecithin, hydrogenated soybean lecithin, hydrogenated phosphatidylcholine,
The emulsified cosmetic composition according to claim 1, which is one kind or two or more kinds selected from hydrogenated phosphatidylserine. 3. The emulsified cosmetic composition according to claim 1, wherein the component (B) is a polyoxypropylene diglyceryl ether having a propylene oxide addition mole number of 5 to 30.