United States Patent:  6,074,652

Assignee:  Shiseido Co., Ltd. (Tokyo, JP)

Filed:  January 20, 1998

An oil-in-water emulsified composition comprising an a .alpha.-monoalkyl glyceryl ether, a wax, and a silicone oil: wherein the amount of the silicone oil is not less than 10 wt % with respect to an oil phase except the a .alpha.-monoalkyl glyceryl ether and the wax, this composition displays excellent emulsion stability and feeling of use.

SUMMARY OF INVENTION

The present invention is achieved in view of the above-mentioned problems of the prior art, a first object of the present invention is to provide an oil-in-water emulsified composition and an oil-in-water emulsifying agent which has a good usability and is excellent in long-term stability and feeling of use.

A second object of the present invention is to provide an oil-in-water emulsified composition which can obtain the long-term stability without spoiling the usability even when a relative large amount of humectant is compounded.

A third object of the present invention is to provide an oil-in-water emulsified composition which is excellent in water resistance and has the function of ultraviolet light protection.

As a result of diligent studies by the present inventors for attaining the above- mentioned objects, it has been found that an oil-in-water emulsified composition which is excellent in the long-term stability and feeling of use can be obtained and that the same composition can be functioned as an excellent oil-in-water emulsifying agent by compounding an .alpha.-monoalkyl glyceryl ether, a wax, and a silicone oil. Accordingly, the present invention has been accomplished.

Namely, an oil-in-water emulsified composition in accordance with the present invention comprising an .alpha.-monoalkyl glyceryl ether, a wax, and a silicone oil, wherein the silicone oil is 10 wt % or more in an oil phase except for the .alpha.-monoalkyl glyceryl ether and the wax.

Also, in the present invention, it is preferable that the composition does not contain a surfactant practically.

Also, it is preferable to further comprise a higher alcohol.

Also, it is preferable to further comprise a water- soluble high polymer.

Also, it is preferable that the compounding amount of said .alpha.-monoalkyl glyceryl ether is 0.2 to 15 wt %.

Also, it is preferable that the compounding amount of said wax is 0.2 to 20 wt %.

Also, an alkyl group of said .alpha.- monoalkyl glyceryl ether is preferably a straight chain alkyl group, more preferably batyl alcohol.

Also, said wax is preferably animal and vegetable wax and in particular, beeswax, candelilla wax, japan wax, cholesterol, phytosterol, or derivative thereof is optimum.

An oil-in-water emulsifying agent in accordance with the present invention comprises an .alpha.-monoalkyl glyceryl ether, a wax, and a silicone oil.

Also, an oil-in-water emulsified composition further comprises a humectant together with said essential ingredients such as the .alpha.-monoalkyl glyceryl ether, the wax and the silicone oil. The amount of said humectant is 15 wt % or more with respect to the whole amount of the composition.

Also, the compounding amount of the humectant is 35 wt % or less.

Also, it is optimum that said humectant is one or more selected from the group consisting of glycerin, fructose, trimethylglycine, sodium lactate, and sodium pyrrolidonecarboxylate.

Also, an oil-in-water emulsified composition further comprises a UV-protecting agent and a film forming agent together with said essential ingredients such as the .alpha.-monoalkyl glyceryl ether, the wax and the silicone oil.

Also, it is preferable that the compounding amount of said film forming agent is 0.01 to 50 wt %.

Also preferably, in the present invention, a make up cosmetic preparation further comprises 5% or more of powder.

Claim 1 of 20 Claims

1. An oil-in-water emulsified composition comprising:

an .alpha.-monoalkyl glyceryl ether, wherein said .alpha.-monoalkyl glyceryl ether is in the amount of 0.2 to 15% by weight;

a wax, wherein said wax is in the amount of 0.2 to 20% by weight; and

a silicone oil, wherein the amount of the silicone oil is not less than 10 wt % with respect to an oil phase except for the .alpha.-monoalkyl glyceryl ether and the wax.

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