JP2706668B2 - Aerosol composition - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an aerosol composition.

[Conventional technology]

Conventionally, as an aerosol product, there are a product in which an active ingredient is sprayed as a mist like a hair spray, and a product in which an active ingredient such as a shaving cream is sprayed as a foam. 32053
As described in Japanese Unexamined Patent Application Publication No. 62-54784, the foam cracked by applying foam to the shear when the user rubs the foam sprayed from the aerosol product on the skin by hand. There has been developed a composition for producing a pressurized foam which emits water.

And, in the composition for producing a pressurized foam which generates a crackling sound as described above,
70 parts by weight or more of dichlorotetrafluoroethane (hereinafter referred to as F1
14) was used. This is because the above F114 has a boiling point
It has a temperature of 3.8 ° C, and has the property of easily emulsifying water. As shown in JP-B-45-32053, the stock solution and propellant are cooled near the freezing point of the stock solution (in the range of -2 ° C to 0 ° C). This is because it has advantageous properties in the production of a composition for producing a pressurized foam, that is, it can be emulsified.

[Problems to be solved by the invention]

However, with respect to F114 used in the above-described composition for producing a pressurized foam, destruction of the ozone layer in the atmosphere due to such hardly decomposable chlorofluorocarbon gas has recently been regarded as a problem on a global scale. That is,
Non-decomposable Freon gas such as F114 gradually diffuses without decomposing to the stratosphere, where it is first decomposed to release chlorine and destroy the ozone layer, thereby reducing the amount of ultraviolet rays reaching the earth. It is said to increase and adversely affect the human body.

Therefore, development of an aerosol composition using a propellant that does not destroy the ozone layer is urgent.

An object of the present invention is to provide an aerosol composition using a propellant that does not destroy the ozone layer as described above.

[Means for solving the problem]

Examples of the liquefied gas having a boiling point close to normal temperature in place of F114 include monochlorodifluoroethane (hereinafter, referred to as F142b), isobutane, and normal butane. However, isobutane and normal butane have a large difference in specific gravity from water used as a stock solution of the aerosol composition. It is difficult to produce a good aerosol composition because no suitable surfactant is found for dispersing and emulsifying in water.

In contrast, the present inventors have found that the use of F142b as a liquefied gas does not have the above-described problem, and can easily produce an aerosol composition that forms a crackling foam. As a result of intensive studies based on new findings, the present invention has been completed.

Therefore, the aerosol composition of the present invention comprises a stock solution 2 containing 3 to 60% by weight of ethanol and / or isopropyl alcohol, 0.01 to 10% by weight of a surfactant and water.
A foam consisting of about 45% by weight and 55-98% by weight of a propellant containing monochlorodifluoroethane as a main component, which forms a crackling sound by foam breaking when sprayed in the form of foam or mist. It is.

Further, specific examples of the composition of the stock solution include those using a water-soluble silicone oil and a surfactant in combination.

As a stock solution of the aerosol composition of the present invention, preferably, 0.01 to 10 parts by weight of a surfactant and / or 100 parts by weight of an aqueous solution of 0 to 60% by weight of ethanol and / or isopropyl alcohol (hereinafter, referred to as alcohol) is added. A stock solution containing 0.01 to 10 parts by weight of an aqueous silicone oil and / or 0.1 to 50 parts by weight of a powder and 0.01 to 50 parts by weight of an active ingredient is used. A propellant containing F142b as a main component is used as the propellant.

Alcohol may not be used as the stock solution, but if it is used for applications that do not like stickiness after application as an aerosol composition, it is advisable to add 60% by weight or less of alcohol. In this case, the alcohol aqueous solution is composed of a 10 to 40% by weight aqueous solution of alcohol.

Alcohol is soluble as a solubilizer or dispersant for both water-soluble components and water-insoluble various organic compounds, but is used as a solubilizer or dispersant for both components. Is also useful as a component for providing a refreshing sensation, and alcohol is also excellent in foam breaking properties and is also useful as a component for increasing foam breaking noise.

Further, when the concentration of the alcohol aqueous solution is more than 60% by weight, the compatibility with the propellant containing F142b as a main component becomes too large, so that foaming at the time of jetting is reduced,
The crackling sound is less likely to occur, so the content is preferably 60% by weight or less. In the case of less than 3% by weight, the oil-based active ingredient insoluble in water is difficult to disperse evenly with the aqueous component, and drying is difficult. 3-60% by weight
, And a particularly preferable range is 10 to 40% by weight.

The surfactant used in the present invention is a component for uniformly dispersing the stock solution and the propellant. Examples thereof include polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkyl phenyl ether, and polyoxyethylene castor oil derivative. The surfactant is not limited to these as long as it can be dispersed.

The surfactant is used in an amount of 0.01 to 10 parts, preferably 0.1 to 5 parts, per 100 parts (parts by weight, hereinafter the same) of the stock solution. When the addition amount is less than 0.01 part, in order to uniformly disperse the stock solution and the propellant, it is necessary to vigorously shake or prolonged shaking, and if it exceeds 10 parts, the surfactant itself will flutter. It is not preferable because it causes discomfort.

The water-soluble silicone used in the present invention is used in combination with the surfactant to uniformly disperse (emulsify) the stock solution and the propellant.
In addition to being a component for making the skin smooth, the surfactant prevents fluttering and gives the skin a smooth feel and at the same time a moisture retention property. Specific examples include a dimethylpolysiloxane polyethylene glycol copolymer in which the hydrophobic group is composed of dimethyl silicone oil and the hydrophilic group is composed of polyether. The water-soluble silicon is 0.01 to 20 parts by weight, preferably 0.1 to 10 parts by weight based on the stock solution.
Add by weight. When the addition amount is less than 0.01 part by weight, it is very difficult to prepare an emulsion of the stock solution and the propellant, and when it exceeds 20 parts by weight, the sticky feeling on the coated surface becomes unfavorably strong.

The powder used in the present invention can be used as long as it is hardly soluble in an aqueous solution containing 0 to 60% by weight of alcohol and a propellant containing F142b as a main component. In particular, talc, nylon, and the like having a shaping effect can be used. It is preferably used. The powder is used by adding 0.1 to 50 parts, preferably 1 to 30 parts, to a 3 to 60% aqueous solution of alcohol.

When the added amount is less than 0.1 part, the effect of obtaining an emulsion by shaking the undiluted solution and the propellant is small, and when the added amount is more than 50 parts, the pressurized composition is sprayed onto the skin or the like, and then dried. It is not preferable because the powder remains on the surface as a stain.

For example, if the emulsion is obtained by shaking the stock solution and the propellant using talc in the range as described above,
Emulsions can be obtained by simple shaking without using a surfactant, in some cases, having the same effect as the surfactant or enhancing the effect of the surfactant.

The active ingredient used in the present invention is selected according to various uses. Examples thereof include an antiperspirant active ingredient, a hair tonic active ingredient, an after-feb lotion active ingredient, a hand lotion active ingredient, an astringent active ingredient, and an acne lotion. Active ingredients, suntan lotion aerosol active ingredients, body lotion active ingredients, repellent active ingredients, itching-preventing active ingredients, anti-inflammatory analgesic active ingredients, fungicide active ingredients, and the like, but are not limited to these, various Active ingredients can be used.

The active ingredient is used by adding 0.1 to 50 parts, preferably 1 to 30 parts, to 100 parts of an aqueous solution of 3 to 60% by weight of alcohol.

If the amount is less than 0.1 part, it is not effective for the intended use, and if it exceeds 50 parts, it becomes difficult to disperse the active ingredient.

As described above, a stock solution used in the present invention can be obtained by adding a surfactant, a water-soluble silicon powder, and an active ingredient to an aqueous solution containing 0 to 60% by weight of an alcohol. As an emulsifying aid, for example, n-propyl alcohol, n-
Monohydric alcohols such as butyl alcohol and modified alcohols thereof; polyhydric alcohols such as propylene glycol, ethylene glycol, diethylene glycol, triethylene glycol and glycerin; ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; diethyl ether and ethylene glycol mono Ethers such as ethyl ether; isopropyl myristate, isopropyl palmitate, butyl myristate,
Esters such as castor oil; liquid paraffin;
Kerosene, xylene, kerosene, etc. may be added and used.

Next, an aerosol composition of the present invention is obtained by preparing a stock solution and a propellant.

By the way, the foam sprayed from the aerosol product makes a crackling sound due to the foam breaking due to the rapid evaporation of the propellant incorporated in the foam. There is a loud sound. In order for the injected foam to crack and break, the boiling point of the propellant is preferably in the range of -15 ° C to 5 ° C. The propellant used in the present invention is mainly composed of F142b, but in addition to this, a propellant selected from liquefied petroleum gas, dimethyl ether, monochlorofluoromethane, tetrafluoroethane, dichlorotrifluoroethane, etc. is used by mixing a small amount with F142b. I can't do anything. When the vapor pressure of the propellant is low, it may be pressurized with CO ₂ , N ₂ , N ₂ O or air.

The ratio between the stock solution and the propellant can be used in the range of 2/98 to 45/55 weight ratio. Preferably, the weight ratio is 5/95 to 40/60. When the mixing ratio is less than 2/98, there is a limit to the amount of the active ingredient to be added, and there is a problem in dispersibility between the stock solution and the propellant. Even if the foam breaks, the crackling sound disappears, which is not preferable.

〔Example〕

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

Example 1 Repellent [Undiluted solution] DET 3.8% by weight (repellent active ingredient, manufactured by Yoshitomi Pharmaceutical Co., Ltd.) SH3371 0.6 〃 (Toray Silicon Co., Ltd.) PBC-44 1.2 〃 (Nikko Chemicals Co., Ltd.) Isopropyl Myristate 0.6 〃 (Emulsification aid) Talc (formation component) 1.1 水 Purified water 92.7 〃Total 100.0 wt% Stock solution 38.0 g (35 wt%) Propellant F142b 70.6 g (65 〃) Use the above stock solution and propellant for aerosol By filling a pressure-resistant container and attaching an aerosol valve, an aerosol product containing an aerosol composition for a repellent, which was discharged in the form of a foam by several shakings and cracked when rubbed against the skin surface, was obtained.

Example 2 Cologne [stock solution] 95% Cycrose-denatured alcohol 15.0% by weight Fragrance (Oshika flavor CH-225) 2.0 〃 Surfactant HCO-40 3.5 〃 (Nikko Chemicals Co., Ltd.) Water-soluble silicon YF3842 2.0 〃 (Toshiba Silicon L-Menthol 0.3 〃 Talc 3.0 〃 IPP isopropyl palmitate 2.5 〃 Purified water 71.7 〃 Total 100.0% by weight Propellant F142b 95% by weight LPG n-butane 5 〃 Total 100.0% by weight Stock solution 25% by weight Propellant 75 〃 The above composition was filled into a pressure-resistant container for aerosol, and an aerosol valve and a button were attached to prepare an aerosol product for cologne.

Example 3 Antiperspirant colon [stock solution] 99 brucine denatured alcohol 25.0% by weight surfactant Evan 740 4.0 〃 (Daiichi Pharmaceutical Co., Ltd.) Zinc oxide 1.0 殺菌 Fungicide Irgasan DP-300 0.5 〃 (Ciba Geigy) Water-soluble silicon SH3771 2.0 〃 PG 3.0 〃 Purified water 64.5 〃 Total 100.0% by weight Propellant F142b 90% by weight Dimethyl ether 5 〃 Isobutane 5 〃 Total 100.0% by weight Stock solution 30% by weight Propellant 70 を Pressure-resistant container for aerosol And fitted with an aerosol valve and button to make an aerosol product for antiperspirant colon.

Example 4 Repellent The same stock solution of aerosol repellent and propellant as in Example 1 were filled in a pressure-resistant container for aerosol, and after attaching an aerosol valve, the internal pressure was increased to 6.0 kg / cm ² gauge pressure at 2.5 ° C. with N ₂ gas pressurized so (N ₂ gas loading 0.16 g)
An aerosol button was attached to obtain a repellent aerosol product.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, the aerosol composition which forms the foam which cracks easily using F142b which does not destroy ozone can be manufactured.

Claims (1)

(57) [Claims] 1 to 60% by weight of a stock solution containing 3 to 60% by weight of ethanol and / or isopropyl alcohol, 0.01 to 10% by weight of a surfactant and water, and 55 to 98% by weight of a propellant mainly composed of monochlorodifluoroethane. An aerosol composition characterized by forming a foam that cracks when foamed or atomized when sprayed.