JP2708691B2 - Aerosol composition containing powder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to a powder-containing aerosol composition. More specifically, the present invention relates to a powder-containing aerosol composition having no storage stability, no foaming property, no stickiness, and excellent use feeling such as good cosmetic stickiness.

[0002]

BACKGROUND OF THE INVENTION Conventional powder-containing aerosol compositions have the disadvantage that powder sedimentation and caking are liable to occur, and that good storage stability cannot be obtained. In addition, it was difficult to obtain products having excellent usability such as foamability, stickiness, and stickiness. Accordingly, the present invention has been made to solve the above problems, and provides a powder-containing aerosol composition having excellent storage stability, foaming properties, non-stickiness, and excellent use feeling such as good cosmetic stickiness. The purpose is to:

[0003]

The present invention is a powder-containing aerosol composition comprising a powder, a salt of a higher fatty acid, a stock solution obtained by mixing xanthen gum and water, and a propellant.

Hereinafter, the present invention will be described in detail. The powder used in the present invention is a powder generally blended in cosmetics, for example, titanium oxide, zinc oxide, talc, kaolin,
Inorganic powders such as mica, iron oxide, ultramarine blue, mica titanium and the like, and organic powders such as nylon powder and polymethyl methacrylate. One or more of these are used. The compounding amount is 1 to 15% by weight in the stock solution. If the amount is less than 1% by weight, the compounding effect is not sufficient. If the amount exceeds 15% by weight, powder agglomeration is liable to occur, and a good injection state such as clogging of a nozzle during injection cannot be obtained. Occasionally, problems in use tend to occur, such as poor stretch on the skin and unevenness.

[0005] The higher fatty acid used in the present invention has 16 to 22 carbon atoms, and a linear saturated fatty acid is preferably used in view of foamability. Those having less than 16 carbon atoms are not preferable in terms of odor and skin safety, and those having more than 22 carbon atoms are not preferable in terms of foaming properties. Basic substances that form salts of higher fatty acids are hydroxides such as potassium hydroxide and amines such as triethanolamine and 2-amino-2-methyl-1-propanediol. The amount of the salt of the higher fatty acid is 1 to 10% by weight in the stock solution. Preferably 1.
5 to 8% by weight. If the amount is less than 1% by weight, good foamability is hardly obtained, and if the amount exceeds 10% by weight, the viscosity increases and it becomes difficult to mix with the propellant. The above higher fatty acids and basic substances can be used alone or in combination of two or more.

The amount of the xanthene gum used in the present invention is 0.01 to 0.5% by weight in the stock solution. Preferably it is 0.07 to 0.2% by weight. If it is less than 0.01% by weight, the storage stability is poor, and if it exceeds 0.5% by weight, the viscosity increases and it becomes difficult to mix with the propellant.

The propellant used in the present invention includes dimethyl ether and liquefied petroleum gas (hereinafter abbreviated as LPG) such as propane, normal butane and isobutane. The compounding amount is 2 to 30% by weight based on the total amount of the powder-containing aerosol composition. If the content is less than 2% by weight, the foamability is poor, and
If the amount exceeds the weight percentage, the compatibility with the stock solution is poor, and the storage stability is poor. These propellants can be used alone or in combination of two or more.

The amount of water used in the present invention is 70 to 90% by weight in the stock solution. As described above, the composition of the undiluted solution has been described. However, a composition in which the undiluted solution is liquid at room temperature is preferable in terms of the effect of the present invention.

The powder-containing aerosol composition of the present invention further comprises, in addition to the above essential constituents, other components generally incorporated in cosmetics, such as animal and vegetable oils, mineral oils, synthetic ester oils and other oils, Glycerin, polyhydric alcohols such as propylene glycol, lower alcohols such as ethanol,
Contains higher alcohols such as stearyl alcohol and cetanol, nonionic surfactants, anionic surfactants, cationic amphoteric surfactants, other thickeners, preservatives, vitamins, ultraviolet absorbers, sequestering agents, fragrances, etc. be able to. Of course, these must be blended within a quantitative and qualitative range that does not impair the effects of the present invention.

Next, the present invention will be described by way of examples. The present invention is not limited thereby.

Prior to the embodiments, an evaluation method employed in each embodiment will be described.

(1) Storage stability A transparent aerosol bottle was filled with a stock solution and a propellant, shaken well, and then left for 6 months at room temperature to evaluate the stability according to the following criteria. ：: Almost no separation and aggregation, good redispersibility △: Separation and aggregation was observed, and redispersibility was difficult ×: Separation and aggregation were remarkable and redispersibility was not possible

(2) Foamability An aerosol container was filled with a stock solution and a propellant, a predetermined amount of foam was sprayed, and the state was evaluated according to the following criteria. ：: creamy and stable foam △: wet and weak foam ×: almost no foam

(3) Usability Using 20 female panels, usability such as stickiness and make-up was evaluated according to the following criteria. ：: 15 or more people who answered good △: 7 to 14 or more people who answered good ×: 6 or less people who answered good

Example 1, Comparative Examples 1-4 Foamed sunscreen Formulations and evaluation results are shown in Table 1. The numbers in the table are% by weight.
Is shown.

[0016]

[Table 1]

The production is performed as follows. That is, the oil phase component is heated and dissolved at 70 to 75 ° C. An aqueous phase component heated and dispersed in advance at 70 to 75 ° C. was added thereto, and after emulsification and dispersion, the mixture was stirred and cooled to room temperature to obtain a stock solution. This stock solution 9
6.0 parts and 4.0 parts of LPG were charged into an aerosol container to obtain a desired foamy sunscreen. The manufacturing methods of the following examples and comparative examples conform to this.

Example 2 and Comparative Examples 5 and 6 Table 2 shows the formulation and evaluation results of the foam foundation.

[0019]

[Table 2]

Example 3 Table 3 shows the hand milk formula and the evaluation results.

[0021]

[Table 3]

[0022]

According to the present invention, there can be provided a powder-containing aerosol composition having excellent storage stability, foamability, non-stickiness, and excellent feeling in use such as good cosmetic stickiness by the constitution described in detail above.

Claims (1)

(57) [Claims] 1. A powder-containing aerosol composition comprising a powder, a salt of a higher fatty acid, a stock solution obtained by mixing xanthene gum and water, and a propellant.