JP2000080017A - Aerosol composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol composition excellent in the redispersion of propellants, capable of forming uniform mist when sprayed and excellent in sense of use when applied to the skin and hair without causing the corrosion of containers and valves. SOLUTION: This aerosol composition contains (A) a formulated concentrate and (B) a propellant in the weight ratio (the ingredient A):(the ingredient B) of (90:10)-(3:97). The ingredient A is a W/O emulsion composition including 0.5-40 wt.% at least one kind selected from a group consisting of 4-6 mers of cyclic silicones, light liquid paraffin and liquid paraffin, 0.1-3 wt.% sorbitan monoisostearate and/or diglyceryl monoisostearate, 0.1-3 wt.% polyether-modified silicone of the formula [(m) is an integer of 300-500; (n) is an integer of 1-7; (a) an integer of 20-30; (b) is an integer of 20-30] and 30-70 wt.% water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerosol composition and, more particularly, to an aerosol composition which contains water in a stock solution, has excellent storage stability and redispersibility, has a uniform mist when sprayed, and is applied to the skin and hair. The present invention relates to an aerosol composition having an excellent feeling upon use when applied.

[0002]

2. Description of the Related Art
Aerosol compositions containing water in the stock solution are used in a state where the stock solution is solubilized using a large amount of dimethyl ether as the propellant, or when the stock solution and the propellant are separated in a pressure vessel using liquefied petroleum gas as the propellant. Occasionally shaken, the propellant is dispersed and used. When the stock solution is solubilized by using a large amount of dimethyl ether as a propellant, containers, valves, and the like may be corroded during long-term storage. In addition, when liquefied petroleum gas is used as the propellant, and the stock solution and the propellant are shaken at the time of use in a state where they are separated in a pressure vessel to disperse the propellant, the above-described corrosion problem does not occur. However, there is a problem that the uniformity of the mist at the time of injection is poor because it is difficult to uniformly disperse.

[0003] Therefore, an object of the present invention is to provide an excellent propellant redispersibility without causing corrosion of containers and valves, a uniform mist at the time of spraying, and an excellent feeling of use when applied to skin and hair. It is to provide an aerosol composition.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to provide at least one compound selected from the group consisting of cyclic silicone tetramer to hexamer, light liquid isoparaffin and liquid isoparaffin.
And sorbitan monoisostearate and / or diglyceryl monoisostearate in an amount of 0.1 to 3% by weight.
Weight% and the following general formula

[0005]

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(Where m is 300 to 500 and n is 1 to
7, a is an integer of 20 to 30, and b is an integer of 20 to 30. )
0.1 to 3 of the polyether-modified silicone represented by
And a water-in-oil type emulsion composition containing 30 to 70% by weight of water as a stock solution, and the weight ratio of the stock solution to the propellant is 90:10.
To 3:97, which is achieved by an aerosol composition.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail.

The cyclic silicone tetramer to hexamer used in the present invention is represented by the following general formula.

[0009]

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(Wherein p is an integer of 4 to 6) The light liquid isoparaffin and liquid isoparaffin used in the present invention have a side chain obtained by copolymerizing isobutene and n-butene and then hydrogenating. A hydrocarbon, whose degree of polymerization is from 4 to 10. One of these or a combination of two or more thereof is used. The content is defined as 100% by weight of the stock solution (hereinafter abbreviated as wt%).
0.5 to 40 wt%, preferably 3 to 30 wt%
It is. That is, if it is less than 0.5 wt%, redispersibility deteriorates, while if it exceeds 40 wt%, the spread becomes poor and the feeling of use is impaired.

[0011] The content of sorbitan monoisostearate and / or diglyceryl monoisostearate used in the present invention is 0.1 to 3 wt%, preferably 0.5 to 3 wt%.
1.5 wt%. That is, if the content is less than 0.1% by weight, the dispersibility of the propellant deteriorates, while if it exceeds 3% by weight, a sticky feeling is caused and a feeling of use is impaired.

The polyether-modified silicone used in the present invention is represented by the general formula (2), and may be a random copolymer or a block copolymer.
Its content is 0.1 to 3 wt%, preferably 0.3 to 3 wt%.
1.5 wt%. If the content is less than 0.1 wt%, the dispersibility of the propellant is poor, while if it exceeds 3 wt%, the spread becomes poor and the usability is impaired.

As the water used in the present invention, purified water or the like is used, and its content is 30 to 70% by weight. Three
If it is less than 0 wt%, the feeling of use will be impaired, and if it exceeds 70 wt%, the dispersibility of the propellant will be poor.

The propellant used in the present invention includes Freon gas such as Freon 11, Freon 12, Freon 21, Freon 113, Freon 114 and Freon 134a, and hydrocarbon-based gas such as propane, isobutane, normal butane, isopentane and neopentane. Liquefied gas such as gas (LPG) and dimethyl ether. Among them, a hydrocarbon-based gas is preferable in consideration of the influence on the environment. These gases can be mixed and adjusted to a desired pressure. Carbon dioxide gas and nitrogen gas may be used, but if used alone, the jetting power is inferior. Therefore, it is preferable to use it in addition to the above chlorofluorocarbon gas and hydrocarbon gas as appropriate. As described above, the use of a large amount of dimethyl ether causes a problem of corrosion of the container. Therefore, it must be less than about 30% by weight based on the total amount of the stock solution and the propellant.

[0015] The content of the propellant is 10 to 97 wt%, preferably 25 to 95 wt% based on the aerosol composition.
wt%. If it is less than 10% by weight, it becomes difficult to form a good mist at the time of injection, and if it exceeds 97% by weight, the way of mist becomes too strong.

The water-insoluble and oil-insoluble powder used in the present invention includes silicic acid, silicic anhydride, diatomaceous earth, talc,
Sericite, mica, kaolin, montmorillonite, clay, bentonite, vermiculite, titanium oxide coated mica (titanium mica), bismuth oxychloride, boron nitride, zirconium oxide, magnesium oxide, zinc oxide,
Titanium oxide, lower titanium oxide, metal tungstate,
Zeolite, ceramic powder, aluminum oxide, calcium sulfate, barium sulfate, calcium carbonate,
Magnesium carbonate, red iron oxide, black iron oxide, yellow iron oxide, ultramarine, navy blue, chromium oxide, chromium hydroxide, calamine, carbon black, nylon 6, nylon 12, nylon 6
6, polyethylene, polypropylene, benzoguanamine powder, polytetrafluoroethylene, polystyrene, polyethylene terephthalate, polycarbonate, polymethyl methacrylate, starch, starch derivatives, silicone powder and composites thereof. By including these powders, the feeling of use (no stickiness)
Can be further improved. The content of the powder is 0.1 to 20 wt% in the stock solution, preferably 0.5 to 10 w
t%. If the amount is less than 0.1 wt%, the feeling of use is not improved, and if it exceeds 20 wt%, the dispersibility deteriorates. The particle size of the powder is preferably 0.01 to 30 μm, and 0.01 μm
If it is less than 30 μm, a feeling of squeezing may be caused and the feeling of use may be impaired.

The aerosol composition of the present invention may contain, if necessary, an oily component, a humectant, an emulsifier, a fragrance, an ultraviolet absorber, a preservative, a plant extract and the like in addition to the above essential components.

[0018]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
In addition, the numerical value in each table represents content (wt%). Prior to the examples, an evaluation method adopted in each example will be described.

(1) Redispersibility Test Method The aerosol composition (pressure-resistant glass container) prepared by a predetermined method is allowed to stand in a thermostat at 0 ° C., 25 ° C., and 45 ° C.
After three weeks, the container was shaken to evaluate the redispersibility of the propellant according to the following evaluation criteria. Re-dispersion easily; ○ Difficult to re-dispersion; ×

(2) Uniformity of Mist The aerosol composition prepared by a predetermined method was sprayed at 25 ° C., and the spray state was visually evaluated. Fog is even and fine; ○ Fog is uneven; ×

(3) Feeling of Use Twenty female panelists evaluated the use characteristics of non-stickiness and non-stickiness according to the following evaluation criteria. 15 or more who answered good; ◎ 〃 10 to 14; ○ ５〜 5 to 9; △ ４ 4 or less; ×

Preparation Method The oil phase component was heated to 70 ° C., the aqueous phase component previously heated to 70 ° C. was added, and after emulsification, the mixture was stirred and cooled to room temperature to obtain the desired stock solution. The undiluted solution was filled into a pressure-resistant container, a valve was attached, and then the propellant was filled.

The polyether-modified silicones used in the examples and comparative examples used in the above formula 2 had m = 400, n = 4, a = 25 and b = 25. The cyclic monosilicone pentamer is manufactured by Union Carbide VS-
7158, diglyceryl monoisostearate is NIKKOL-DGMS manufactured by Nikko Chemical Co., sorbitan monoisostearate is Krill 6 manufactured by Croda, liquid paraffin is carnation 70 manufactured by Witco Chemical, and dimethylpolysiloxane is silicon KF- manufactured by Shin-Etsu Chemical Co., Ltd. 9
6H, methylphenylpolysiloxane is silicon KF-56 manufactured by Shin-Etsu Chemical Co., Ltd., titanium oxide is titanium oxide JR-701 manufactured by Teica, and talc is talc SW- manufactured by Asada Flour Milling Co., Ltd.
K4 was used.

Examples 1 to 12, Comparative Examples 1 to 10 (Body cream)

[0025]

[Table 1]

[0026]

[Table 2]

As shown in Table 1, Examples 1 to 1 of the present invention
Sample No. 2 was excellent in all aspects of the redispersibility of the propellant, the uniformity of the mist, and the usability. On the other hand, it can be seen that the comparative example lacking the essential component and the comparative example in which the content of the essential component is out of the specific range are inferior in any of the dispersibility of the propellant, the uniformity of the mist, and the usability. .

Example 13 (Hair cream) Light liquid isoparaffin 20.0 (Pearl Ream 4; manufactured by NOF Corporation) Polyether-modified silicone 1.0 Sorbitan monoisostearate 2.0 (Crill 6; manufactured by Croda) Liquid paraffin 5.0 (Carnation 70; manufactured by Witco Chemical) Polyvinylpyrrolidone 1.0 (PVP K-30; manufactured by BASF) Silicone powder 3.0 (Trefil E-501; manufactured by Dow Corning Toray) Ethanol 10.0 2-Ethylhexyl paramethoxycinnamate 5.0 (Palsol MCX; manufactured by Givaudan) Purified water 53.0

The above components were emulsified by the above-mentioned preparation method, and the obtained water-in-oil type emulsified composition was used as a stock solution.
An aerosol-type hair cream (aerosol composition) was prepared by filling 40 wt% of LPG as a propellant and 10 wt% of dimethyl ether.

This aerosol composition was excellent in the redispersibility of the propellant, the mist at the time of injection was uniform, and the feeling in use was also excellent.

[0031]

As described above, it is apparent that the present invention provides an aerosol composition which is extremely excellent in the redispersibility of the propellant, the uniformity of the mist, and the usability.

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Claims (2)

[Claims] Claims 1. A cyclic silicone tetramer to hexamer, light liquid isoparaffin and liquid isoparaffin, at least one selected from the group consisting of 0.5 to 40% by weight, and sorbitan monoisostearate and / or diglyceryl monoisostearate. 0.1 to 3% by weight and the following general formula: (Wherein, m is 300 to 500, n is 1 to 7, a is 20 to
30, b is an integer of 20 to 30. The water-in-oil emulsion composition containing 0.1 to 3% by weight of the polyether-modified silicone represented by the formula (1) and 30 to 70% by weight of water is used as a stock solution, and the weight ratio of the stock solution to the propellant is 90:10 to An aerosol composition characterized by a ratio of 3:97. 2. A stock solution containing 0.1 to 20% by weight of a water-insoluble and oil-insoluble powder.
An aerosol composition as described in any of the preceding claims.