JPH022887A - Noncooling aerosol product - Google Patents

Abstract

PURPOSE:To obtain a misty spray having no cooling action by mixing a stock soln. contg. specified percentages of water, alcohol, a hydrophilic nonionic surfactant and an effective component with a specified percentage of liquefied petroleum gas as a spraying agent. CONSTITUTION:A stock soln. consisting of 50-90wt.% water, 2.0-10wt.% <=3C univalent aliphatic alcohol such as ethanol, 0.1-0.5wt.% hydrophilic nonionic surfactant such as polyoxyethylene alkylphosphoric ester and 0.1-10wt.% effective component such as phthalthrin as an insecticide is prepd. and combined with 8.0-30.0wt.% liquefied petroleum gas as a spraying agent basing on the total amt. of all the contents. The resulting compsn. is filled into an aerosol vessel. The stock soln. to be sprayed is mixed with the gas in the outlet path 8 of the vessel and sprayed to obtain a misty spray having no cooling action.

Description

[Detailed description of the invention] [Industrial application field] FIELD OF THE INVENTION This invention relates to non-refrigerated aerosol products.

[Conventional technology]

In general, in aerosol products that contain a concentrate and a propellant, some or all of the propellant is dissolved in the concentrate, so when applied, the propellant in the sprayed concentrate vaporizes and the product is exposed to the air. The applied material is subject to a cooling effect, which may cause the leaves of the plants to wilt, for example in the case of horticultural aerosol products;
Furthermore, in the case of aerosol products for the human body, there is a risk of cold injury to the area to which they are applied. If a large amount of alcohol is used to stabilize the dissolved state of the active ingredient,
This tendency is particularly remarkable due to the added cooling effect of the alcohol.

[Problem to be solved by the invention]

In order to obtain an aerosol product without a cooling effect as described above, it is conceivable to use, for example, a propellant that does not dissolve in the stock solution. However, in this case, since the propellant is not dissolved in the stock solution to be injected, the injected droplets (mist) are not sufficiently divided, making it impossible to obtain a fine mist-like injection state that is preferable for an aerosol. There is a problem.

The present invention has been made based on the above circumstances, and an object of the present invention is to provide a non-cooling aerosol product in which the sprayed product has a cooling effect and can provide a fine mist-like sprayed state. .

[Means for solving problems]

The non-refrigerated aerosol product according to the present invention comprises 50-90% by weight of water, 2.0-10% by weight of a monohydric aliphatic alcohol with a carbon number of 3 or less, and 0.1-0.5% by weight. An aerosol composition containing a hydrophilic nonionic surfactant, 0.1 to 10% by weight of an active ingredient, and a propellant consisting of 8.0 to 30.0% by weight of liquefied petroleum gas. The aerosol container is filled in a container, and the aerosol container is characterized in that it has a gas mixing valve that mixes propellant gas in the container with the stock solution injected from inside the container.

The present invention will be specifically explained below.

In the present invention, 50 to 90% by weight based on the total content
water, 2.0 to 10% by weight of a monohydric aliphatic alcohol having 3 or less carbon atoms, 0.1 to 0.5% by weight of a hydrophilic nonionic surfactant, and 0.1 to 10% by weight of a hydrophilic nonionic surfactant. A stock solution is prepared with 10% by weight of active ingredient, to which 8.0% by weight is added to the total content.
A propellant consisting of ~30.0% by weight of liquefied petroleum gas is used in combination, and the composition is filled into an aerosol container equipped with a gas mixing valve as described below to form an aerosol product.

In the above composition, purified water is preferably used as water, and its proportion is 50% by weight or more and 90% by weight or less, based on the total content. Preferable monohydric aliphatic alcohols having 3 or less carbon atoms include ethyl alcohol and isopropyl alcohol, and this alcohol is used in an amount of 2.0 to 10% by weight. When the proportion of water is less than 1% by weight or when the proportion of alcohol exceeds 10% by weight, the solubility of the stock solution in the propellant increases and the propellant dissolves in the stock solution. Since the cooling effect of alcohol itself is significant, it becomes difficult to achieve the desired non-cooling property. On the other hand, if the proportion of water exceeds 90% by weight or the proportion of alcohol is less than 2.0% by weight, it may be impossible to prepare a uniform stock solution, or the stock solution may have insufficient solubility. For this reason, it is difficult to obtain a suitable aerosol composition because the number of active ingredients that can be used or the amount used is limited.

In addition, the hydrophilic nonionic surfactant is blended to stably dissolve the active ingredients described below in the stock solution, and preferably has an HLB of 10 or more, with an HLB of 0. It is used in a proportion of 1 to 0.5% by weight. Specific examples of this nonionic surfactant include polyoxyethylene alkyl phosphate; polyoxyethylene oleyl ether, polyoxyethylene lauryl ether, polyoxyethylene heptyl ether, polyoxyethylene polyoxypropylene heptyl ether, Polyoxyethylene alkyl ethers such as oxyethylene alkyl nonylphenyl ether and polyoxyethylene alkyl nonyl octylphenyl ether; polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monooleate and polyoxyethylene sorbitan monolaurate; others to be mentioned. I can do it.

The active ingredients are selected depending on the intended use of the resulting aerosol product; for example, in the case of aerosol products for gardening, insecticides, fungicides, nutrients, etc. are used, and in the case of aerosol products for human use, insecticides, fungicides, nutrients, etc. are used. , bactericidal agents, skin astringents, cleansing agents, etc. and, in some cases, soluble resins, such as in hair aerosol products.

Examples of insecticides include phthalthrin, allethrin, fenitrothion, and resmethrin, and examples of fungicides include triforin and irgasan 0P.
-300, chlorhexidine hydrochloride, and the like, and examples of skin astringents include basic aluminum chloride, rebidrol^, S, and C. Examples of the soluble resin include polyvinyl alcohol, polyvinylpyrrolidone, acrylic resin, and others.

Various additional components can be further added to the stock solution consisting of the above-mentioned components. The added ingredients here are:
Examples include coloring materials such as kaolin, cursamine, and talc, fragrances, and others.

The aerosol container used in the present invention has a gas mixing valve, and the gas mixing valve has a stock solution flow path for injecting the stock solution from inside the aerosol container, and a stock solution flow path for directing the stock solution into the aerosol container. This valve has a gas flow path formed to mix propellant gas from the gas phase inside the valve.

FIG. 1 is a sectional view showing an example of a gas mixing valve preferably used in the present invention. In this figure, l is the mountain cup, 2 is the upper gasket, 3 is the housing,
4 is a dip tube, 5 is a stock solution introduction hole, 6 is a stem,
7 is a spring, 8 is a lead-out path, 9 is a raw solution communication hole, and 10 is a gas furnace that blocks the raw solution communication hole 9 and the raw solution introduction hole 5.
, ), 11 is an inner circumferential surface for shutting off the gasket 10, and 12 is an engaging portion formed on the stem 6. The engaging portion 12 deforms the gasket 10 and opens and closes the stock solution communication hole 9. 13 is a gas outlet hole, 14 is a gas phase part in the container, and 15 is an opening/closing body for the gas outlet hole 13, and its upper end surface 16
is in contact with the upper gasket 2, and the annular protrusion 17 on the lower end surface
is in contact with the upper surface 18 of the gasket 10.

19 is a gas circulation space, 20 is a push button, 21 is an introduction chamber, 22
is a nozzle.

According to the gas mixing valve having such a configuration, when the push button 20 is pushed down against the spring 7, the gasket 10 is deformed by the engaging portion 12, and as a result, the annular protrusion 17 of the opening/closing body 15 first deforms the gasket 10. A gas outlet hole 13 is spaced apart from the top surface and communicates with the gas phase part 14 in the container, and the propellant gas is guided from the gas outlet hole 13 to the outlet path 8. Then, the gasket 10 is further deformed and the undiluted solution communication hole 9 is connected to the undiluted solution. Introduction hole 5
This leads the stock solution to the outlet path 8 , and as a result, the stock solution and propellant gas are mixed in the outlet path 8 and are injected from the nozzle 22 through the introduction chamber 21 .

The above gas mixing valve is described in Japanese Utility Model Publication No. 57-10782, but it goes without saying that the present invention is not limited to J.
However, the configuration is not limited to this, and various gas mixing valves can be used. For example, a gas mixing valve, commonly called a paper tap, having a hole in the side wall of the housing that communicates with the gas phase in the aerosol container may be used. May be used.

[Action of the invention]

The non-cooling aerosol product of the present invention has a stock solution containing a specific proportion of water, alcohol, a hydrophilic nonionic surfactant, and an active ingredient; Since the proportion is large and the propellant is made of liquefied petroleum gas, the propellant hardly dissolves in the stock solution, and therefore the proportion of vaporized components in the injected propellant is very low. Because it is so low, there is almost no cooling effect. Therefore, when it is used as an aerosol product for gardening, it does not cause cold damage to the plants to which it is applied, and when it is used as an aerosol product for the human body, it does not cause cold injury to the application site.

In addition, when the gas mixing valve of the aerosol container used in the present invention is wiped, propellant gas is mixed with the sprayed stock solution from the gas phase of the propellant, so the stock solution sprayed into the atmosphere is sufficiently fine. It is possible to obtain a fine mist-like spray which is broken up into droplets and is therefore preferable as an aerosol.

As described above, the non-cooling aerosol product of the present invention is suitable for use in gardening or for human use, but is not limited to these, and is suitable in cases where cooling is to be avoided.

〔Example〕

Examples of the present invention will be described below, but the present invention is not limited thereto. Note that "%" is based on weight.

Each of the aerosol compositions according to Formulation Examples 1 to 3 and Comparative Formulation Examples 1 and 2 shown below was filled into an aerosol container having a gas mixing valve to form three aerosol products of the present invention and two comparative aerosol products. A horticultural aerosol product was obtained.

The polyoxyalkyl phosphate ester used here has an HLB of 10 or more.

Formulation example 1 [Insecticide] Phthalthrin 0.2% polyoxyalkyl phosphate ester isopropyl alcohol purified water Liquefied petroleum gas Formulation example 2 [Insecticide/fungicide] Allethrin triforine synergist polyoxyalkyl phosphate ester isopropyl alcohol purified water Liquefied Petroleum Gas Formulation Example 3 [Insecticide/Fungicide] Fenitrothion resmethrin trifoline polyoxyalkyl phosphate ester Main ingredient stabilizer Isopropyl alcohol Purified water 0°2% 4.0% 7946% 16.0% 0.1% 0. 05% 0.1% 0.15% 5.0% 78.2% 16.0% 0.1% 0.05% 0.05% 0.1% 0.5% 5.0% 82.2% Liquefied petroleum gas comparative formulation example 1 Allethrin synergist cellosolvein propyl alcohol dimethyl ether Comparative formulation example 2 Resmethrin triforin cellosolve methylene dimethyl chloride Experimental example Using each of the aerosol products obtained as above, the following procedure was carried out. An experiment was conducted on the cooling effect. That is, under conditions of an air temperature of 27°C, each aerosol product kept at a temperature of 25°C was applied to the leaf surface of a plant from 1Q.
Sprayed for 30 seconds from a position 1 cm apart, and measured the temperature change on the leaf surface during and after spraying. 28.15% 28.1% 43.5% Measured using a digital surface thermometer with a measuring terminal in contact with the leaf surface.

The results are shown in Figure 2. Curves ■, ■ and ■
are the curves for the aerosol products of the present invention according to Formulation Examples 1 to 3, respectively. and li for the comparative aerosol products according to Comparative Formulation Examples 1 and 2, respectively, and curve C
is a control curve and shows the case where water was sprayed onto the leaf surface by a sprayer.

Also, except that the distance from the leaf surface was changed to 3Qcm,
Temperature changes on the leaf surface were measured in exactly the same manner as above. The results are shown in Figure 3.

As is clear from the results of these experiments, with the aerosol product according to the present invention, almost the same temperature change as in the control example can be obtained, but with the aerosol product according to the comparative formulation example, a large temperature decrease is obtained. is recognized.

〔Effect of the invention〕

As described above, according to the non-cooling aerosol product of the present invention, the stock solution has a small proportion of alcohol and a large proportion of water, and the propellant is liquefied petroleum gas. The proportion of components that vaporize is very low, and almost no cooling effect occurs. Further, since the gas in the gas phase of the propellant is mixed with the injected stock solution by the gas mixing valve for injection, a fine mist-like injection state suitable for an aerosol can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a gas mixing valve of an aerosol container that can be used in the present invention, and FIGS.
Each figure is a curve diagram showing the temperature change on the surface of an object when the aerosol product of the present invention is sprayed. l... Mountain cup 3... Housing 5... Stock solution introduction hole 7... Spring 9... Stock solution communication hole 12... Engagement part 14... Gas phase part in container 17... Annular Projection 2... Upper gasket 4... Dip tube 6... Stem 8... Outlet path 10... Gasket 13... Gas outlet hole 15... Opening/closing body 20... Push button 21 ...Introduction chamber 22...Nozzle +2 Fig. Time 10 Fig. 13 Fig.

Claims (1)

[Claims] 1) 50 to 90% by weight of water, 2.0 to 10% by weight of a monohydric aliphatic alcohol having 3 or less carbon atoms, and 0.1 to 0.
．． 5% by weight of hydrophilic nonionic surfactant and 0.1 to
A composition containing 10% by weight of an active ingredient and a propellant consisting of 8.0 to 30.0% by weight of liquefied petroleum gas is filled into an aerosol container, and the aerosol container A non-refrigerated aerosol product characterized by having a gas mixing valve that mixes propellant gas in the container with a stock solution injected from inside.