JPS61258887A - Aerosol - Google Patents

Abstract

PURPOSE:To obtain an aerosol effective to prevent the lowering of pressure in the aerosol container according to use and to keep the inner pressure of the container to a definite level to the last, by filling an aluminosilicate containing adsorbed CO2 in a container together with a stock liquid and a propellant. CONSTITUTION:Carbon dioxide gas is adsorbed to an aluminosilicate, and the salt is filled together with a stock liquid and a propellant (preferably a compressed gas) in a container to obtain the objective aerosol. The adsorption of carbon dioxide gas to an aluminosilicate can be carried out e.g. by thermally dehydrating an aluminosilicate and contacting with carbon dioxide gas under a CO2 pressure of 1-20kg/cm<2> at <=10 deg.C preferably under anhydrous condition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an aerosol, and more particularly, to an aerosol in which a conventional aerosol pressure accumulator is filled with an aluminosilicate containing adsorbed carbon dioxide gas. .

[Conventional technology]

Conventionally, aerosol propellants include fluorocarbons, LPG,
Dimethyl ether (DME) has been used for a long time, but chlorofluorocarbons cause an increase in skin diseases due to the destruction of the ozone layer, and LP.
There are concerns about G being highly flammable and dangerous, and DME being toxic and corrosive, so they are generally used for limited purposes.

On the other hand, in aerosols for the human body, there is currently a need to use nonflammable propellants, so compressed gases made of tasteless, odorless and highly safe gases such as nitrogen and carbon dioxide gas are used as propellants. And usually this compressed gas is 3 to 6
It is used at an internal pressure of about 2/α2.

[Problem that the invention seeks to solve]

However, in general, aerosols that use compressed gas as a propellant have a significant decrease in internal pressure as the content decreases compared to those that use liquefied gases such as CFCs and LPG as propellants, and in the later stages of use, sufficient injection is not possible. It has the disadvantage that performance cannot be obtained. Furthermore, if the tip of the dip tube injects only the inside of the container into the gas phase rather than into the liquid phase, only compressed gas will be ejected, resulting in a significant drop in internal pressure. A weight is attached to the tip of the dip tube so that the tip of the dip tube is always immersed in the liquid phase.

[Means for solving problems]

Under these circumstances, the inventor of the present invention has conducted various studies in order to eliminate the disadvantages and inconveniences of aerosols that use compressed gas as a propellant, and has found that a container can be filled with 9-aluminosilicate together with a propellant to adsorb carbon dioxide gas. For example, the present invention was completed based on the discovery that it is possible to prevent the pressure inside the container from decreasing during use, and to maintain the internal pressure constant until the end of use.

That is, the present invention provides an aerosol characterized in that an aluminosilicate adsorbed with carbon dioxide gas is filled in a container together with a sulfur solution and a propellant.

The aluminosilicate used in the present invention can be in any of amorphous, partially crystalline, and crystalline forms, but crystalline forms are preferred. Specifically, natural aluminosilicates such as analcite and chabazite, synthetic zeolites designated by names such as zeolite A%X, Y, etc. are used. Among these, synthetic zeolites represented by the following general formula are preferred, as they contain less impurities and other contaminants.

(Mz/r10) X-A/*Os” (SICh
)y ・(HzO)z (in the formula, M is a metal button with a valence of n, X is 0, 7 to 1.5, y is 0.8 to 10%, Z is a number of 0 or more) Among the synthetic zeolites represented by the general formula, examples of the metal atom represented by M include sodium, potassium, calcium, magnesium, etc. Calcium is preferred from the viewpoint of adsorption and stability of subcarbon dioxide gas. 2 is preferably 01, that is, one that does not substantially contain water. To be sure, in the present invention, the particle diameter is preferably 0.5 to 100.
μ, particularly preferably from 1 to 40 μ, is used, but since there is a risk of clogging the ejection system if used as a powder, it is molded to a uniform plate size. It is preferable to use, especially when the outer diameter is 0.
Carbon dioxide gas can be adsorbed and contained in the aluminosilicate, which is preferably used in the form of granules or pellets of 7 f1 or larger, by, for example, bringing the aluminosilicate into contact with carbon dioxide. In this case, the 1-aluminosilicate is preferably dehydrated by heat treatment and optimally contains substantially no water. The adsorption is preferably carried out under anhydrous conditions at a carbon dioxide pressure of 0.1
KP/c! 1K” or more, preferably 1 to 10 Kl/
The temperature is 30° C. or lower, preferably 20° C. or lower, and the time is not particularly limited, but the reaction is preferably carried out until equilibrium is reached.

The adsorption amount of carbon dioxide gas on aluminosilicate is 2fCCh
/ 100 f aluminosilicate or higher is preferable, but special K 5fCO! /100t aluminosilicate or more is preferable.

The aerosol of the present invention is produced by adsorbing and containing carbon dioxide gas as described above and filling a pressure accumulator together with the stock solution and propellant used in conventional aerosols into a pressure accumulator container according to a method known per se. be done. In addition, when the aluminosilicate comes into contact with water, it may release carbon dioxide gas at once depending on the internal pressure of the pressure storage container and the amount of water.
In order to maintain a constant internal pressure until the late stage of use, it is preferable that the stock solution of the pressure storage contents be non-aqueous. Further, the propellant is not particularly limited, but a particularly remarkable effect can be obtained with compressed gas. Compressed gas is
Carbon dioxide, nitrogen rings, or any gas used in conventional aerosols can be used.

[For production]

The aluminosilicate adsorbing and containing carbon dioxide gas used in the aerosol of the present invention releases carbon dioxide gas when the pressure of the propellant decreases, and has the effect of preventing a decrease in internal pressure.

[Young fruit of invention]

Aerosols that use compressed gas as the traditional propellant are
With use, the internal pressure decreases and the amount of undiluted solution sprayed decreases, which is extremely inconvenient. In contrast, the aerosol of the present invention can maintain a constant internal pressure until the end of use, even if it uses compressed gas as the propellant.

〔Example〕

The present invention will be explained with reference to the following examples.

Example 1 Zeolite A-type zeolite particle size 1.7-2.4U) 1
002 was sealed in a metal pressure-tight airtight container with an internal capacity of 300 tIlt, and carbon dioxide gas was pressurized at a pressure of 9 K517 cyt'' to obtain a carbon dioxide-containing zeolite (zeolite) 1
00? The amount of carbon dioxide gas adsorbed per unit was 17.2F.

Example 2 Neopinamine 0.42 to Kerosene 1507! The carbon dioxide-containing zeolite obtained in Example 1 was mixed with the insecticide stock solution dissolved in the solution in the ratio shown in Table 1 below, and the following was sealed in a metal pressure-tight airtight container, and then passed through the stem of an aerosol valve. We specialize in carbon dioxide aerosol by filling it with carbon dioxide gas at a pressure of 5K9/cm. We injected this aerosol at the Royal Institute for 1 minute each and measured the injection amount and internal pressure.The results are shown in Figures 1 and 2. As shown in the figure.

[Brief explanation of the drawing]

Figures 1 and 2 both show the results of the injection test of the carbon dioxide aerosol obtained in Example 2, where Figure 1 shows the relationship between the number of injections and the amount of injection, and Figure 2 shows the number of injections. It is a drawing showing the relationship between and internal pressure. that's all

Claims (1)

[Scope of Claims] 1. An aerosol characterized in that an aluminosilicate adsorbed with carbon dioxide gas is filled in a container together with a stock solution and a propellant. 2. The aerosol according to claim 1, wherein the propellant is a compressed gas.