JPS6099358A - Aerosol product - Google Patents

Abstract

PURPOSE:To improve the spraying performance, and to enable the longterm preservation by fixing an aerosol valve whose dip tube has an inverted funnel- shaped lower end to a pressure vessel. CONSTITUTION:An aerosol valve 9 whose dip tube has an inverted funnel-shaped lower end 4 is fixed to a pressure vessel. The diameter (a) of the inverted funnel part 4 is made smaller than the diameter (b) of the inlet of the pressure vessel 4 so that the inverted funnel part 4 can be inserted into the pressure vessel 2. Accordingly, the amt. of the contents which are present far from the lower end of the dip tube is made small, and the spraying is easily carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aerosol product equipped with a shaped aerosol valve.

Various aerosol products are on the market, but the types of aerosol products that use powder are limited, and the amount of powder used is small, making it difficult to use in large quantities. ing. This is because when powder is filled into an aerosol product, it generally settles to the bottom due to its high specific gravity, and if left for a long period of time it will aggregate, so when using it, shake it up and down to loosen the powder agglomeration and make the contents homogeneous. There will be a need to use it later. Therefore, various limitations arise, such as the amount of powder to be used, the drug packed together with the powder, and the size of the aerosol product. For example, in the case of a simple aerosol fire extinguisher using halon and alkali metal bicarbonate powder, which is an aerosol product that uses a fairly large amount of powder and cannot be shaken thoroughly before use, it is necessary to spray enough powder at the time of use. Even though the actual effective fire extinguishing ability is sufficient, the apparent fire extinguishing ability may decrease and the fire extinguishing ability may not be sufficient. Therefore, it is necessary to manufacture a fire extinguisher that has a reduced content of powder components that are effective against tempura oil fires and sacrifices fire extinguishing performance against these fires.

In order to eliminate the drawbacks of aerosol products that use a large amount of powder as described above, the present inventors have studied various compositions of the contents of aerosol products and have developed an aerosol product that can sufficiently spray the contents. However, improvements in terms of content composition have their own limitations, such as the need to use specific compounds, and the inability to sufficiently apply to cases where it is desired to further improve injection performance that has been improved in terms of composition. have.

In view of the above-mentioned circumstances, the inventors of the present invention have further improved the jetting performance of aerosol products containing a large amount of powder, the jetting performance after long-term storage, etc. by improving the structure of aerosol product containers, etc. As a result of extensive research in order to eliminate the limitations from the composition aspect, the contents of the aerosol product were sealed in a pressure-resistant container equipped with an aerosol valve with an inverted dowel shape at the lower end of the dip tube. The inventors have found a way to achieve the objective and have completed the present invention.

The aerosol product of the present invention will be explained based on the drawings.

FIG. 1 is a schematic sectional view showing an embodiment of the aerosol product of the present invention, and FIGS. 2 and 3 are both schematic sectional views showing embodiments of the dip tube whose lower end is in the shape of an inverted wave, used in the present invention. It is a diagram.

Aerosol products (1) as shown in Figure 1 are usually produced by filling a pressure-resistant container (2) with powder or stock solution, and then attaching an aerosol valve (9) with a dip tube (8) to release the propellant. Manufactured by press fitting. The contents of the aerosol product are divided into a layer (5a) in which powder and concentrate are mixed and a concentrate (5b).

Conventionally used aerosol products have a dip tube (8) with approximately the same diameter up to the bottom end as shown in Figure 5.
An aerosol valve (9) is used.

Therefore, when the aerosol valve (9) is opened, the contents consisting of the mixed layer (5a) of powder and stock solution and the stock solution (5b) are transferred to the dip tube (8) due to the pressure inside the pressure container.
The contents move inside the pressure vessel in the direction shown by the arrow shown in Figure 5 and are injected to the outside through the aerosol valve (9) and are located far away from the bottom end of the dip tube. When the contents containing the settled powder are injected, the mixture (5a) of the powder and the stock solution has a pressure-resistant capacity.
It tends to remain near the inner wall of the container (2).

On the other hand, when using an aerosol product with an aerosol valve (9) in which the lower end of the dip tube has a reverse wave shape (hereinafter referred to as a reverse funnel shape part (4)) as shown in FIG. The diameter of the lower end of the dip tube (8) can be significantly larger than the diameter of the dip tube (8), thereby reducing the amount of content present far away from the dip tube's lower end. , it becomes easier to be sprayed.

In addition to this effect, if the inverted funnel-shaped part (4) is provided, a flow like the arrow shown in Fig. 4 will occur during injection, so that the inverted funnel-shaped part (4) should be far away from the end. The mixed contents of the precipitated powder and the stock solution are also more likely to be jetted.

The diameter (a) of the inverted funnel-shaped part (4) used in the present invention is smaller than the diameter (b) of the inlet of the pressure vessel (2), and the inverted funnel-shaped part (4)
A larger one is preferable as long as it can be inserted into the pressure container (2).

If the shape of the inverted funnel-shaped part (4) is provided with one or more notches (7) or holes (8) at the end, as shown in FIG. 2 or FIG. In the case, there is a reverse dowel (
Even if the lower end of 4) is in contact with the bottom (6) of the pressure container, the contents can be sprayed.

In such a case, the amount of contents remaining in the container becomes extremely small, probably because a lateral flow occurs in addition to the vertical flow as shown in FIG. 4. Of course the second
As shown in Figures 1 and 4, the inverted funnel-shaped part (4) and the bottom (4) of the pressure vessel (
6) may be used by providing an interval for spouting the contents.

The inverted wave-like part (the inverse wave part) may be integrally molded with the dip tube, or may be manufactured separately from the dip tube and then connected to the dip tube as shown in FIGS. 2 and 3.

The pressure container used in the present invention is usually air-filled, but there is no particular limitation, but the diameter of the pressure container is preferably about 40 to 65 mm, and the internal volume is preferably about 250 to 550 m#. When such a pressure-resistant container is used, the diameter of the inverted wave-shaped portion is preferably about 15 to 25 mm. In addition, the cut or hole provided in the reverse wave-like part should be 6 to 50 mm.
The number of cuts or holes is preferably about 2, and the number of cuts or holes is preferably 1 to 8. The distance between the end of the inverted funnel and the bottom of the pressure vessel is 0 to 0 if there is a cut or hole.
The inner diameter of the dip tube is preferably about 5 to 10 mm.

The aerosol product contents used in the present invention include those normally used in aerosol products, and are not particularly limited. However, if a content containing powder, especially a content containing a large amount of powder, is used as the content of the aerosol product, such as a content consisting of powder, an undiluted solution, and a propellant, or a content consisting of powder and a propellant,
Compared to conventional aerosol products, the injection performance after long-term storage is improved.

The contents of the niazole product consisting of the powder, stock solution and propellant include, for example, 10 to 40 parts (weight 1, hereinafter referred to as "m") of a powder whose main component is an alkali metal bicarbonate, and a powder whose main component is dibromotetrafluoroethane. Examples include a fire extinguishing agent consisting of 55 to 85 parts of nonflammable liquid and 5 to 20 parts of nonflammable liquefied gas.

Note that the alkali metal bicarbonate has a particle size of 3, because it is easy to spray and is difficult to scatter when sprayed.
Examples include sodium bicarbonate or potassium bicarbonate having a diameter of about 0 to 100 μm, either singly or as a mixture. When sodium bicarbonate or potassium bicarbonate is used as the alkali metal bicarbonate, it is safe even in contact with the human body and does not react with other components of pressure containers or fire extinguishing agents such as dibromotetrafluoroethane. It is possible to carry a long-term stable extinguishing agent.

The powder containing an alkali metal bicarbonate as a main component preferably contains 75% or more (by weight, the same applies hereinafter) of the alkali metal bicarbonate, and if the content is less than 75%, the powder is The extinguishing performance of the extinguishing agent manufactured using this method against tempura oil fires, etc. becomes insufficient. Other components that may be contained in the powder include finely powdered silica, finely powdered titanium oxide, potassium carbonate, talc, and other inorganic substances and minerals. When about 1 to 5 parts of very fine primary particles, such as finely powdered silica or finely powdered titanium oxide, are contained in 100 parts of powder whose main component is an alkali metal bicarbonate, the fluidity of the powder can be improved. Producing a fire extinguishing agent using a powder with improved flowability can provide good jetting performance over a long period of time. By using an aerosol container equipped with an aerosol valve, it is possible to obtain an aerosol product that has good jetting performance for an even longer period of time.

It is preferable that the powder containing the alkali metal bicarbonate as a main component is contained in about 10 to 40 parts per 100 parts of the extinguishing agent, and if the proportion is less than about 10 parts, the effect against tempura oil fires will be small. If the amount exceeds about 40 parts, not only will it not be possible to properly spray the aerosol product, but if the aerosol product is stored for a long period of time, the powder will harden and agglomerate, causing clogging, and causing a car fire (car engine room). Fire extinguishing performance against fires such as fires may deteriorate.

The nonflammable liquid containing dibromotetrafluoroethane as a main component preferably contains less than about 75% dibromotetrafluoroethane, and if the content is less than about 75%, the fire extinguishing agent produced using it Fire extinguishing performance decreases. Components other than dibromotetrafluoroethane contained in the nonflammable liquid are preferably nonflammable liquids such as trichlorotrioletetraethane and trichlorofluoromethane, but are not limited thereto. The nonflammable liquid is preferably contained in about 55 to 80 parts per 10 parts of the extinguishing agent; if the proportion is less than about 55 parts, the extinguishing performance of the extinguishing agent will be insufficient;
If the amount exceeds 0 parts, other components in the extinguishing agent will be relatively small, making it difficult to spray the extinguishing agent properly, and the extinguishing performance against tempura oil fires will be insufficient.

Examples of the nonflammable liquefied gas include promotrifluoromethane, bromochlorodifluoromethane, dichlorodifluoromethane, and chlorodifluoromethane, which act as propellants and may be used alone or in combination of two or more. The non-flammable liquefied gas, promotrifluoromethane, is a particularly preferred propellant that also has high fire extinguishing performance. The proportion of the nonflammable liquefied gas in 100 parts of the extinguishing agent is preferably about 5 to 20 parts; if the proportion is less than about 5 parts, the extinguishing agent cannot be injected normally; If the amount exceeds that amount, other components will decrease, and fire extinguishing performance will deteriorate.

The contents of the aerosol product comprising a powder and a propellant used in the present invention include, for example, an air-V-ru type simple fire extinguishing system in which the powder is ammonium phosphorus dihydrogen and the propellant is a mixture of bromochlorodifluoromethane and promotrifluoromethane. Ingredients etc.

These aerosol products that do not use undiluted solutions also behave in a pressure-tight container under oil field conditions, with no difference in behavior from aerosol products that use undiluted solutions.

Next, the aerosol product of the present invention will be explained based on Examples and Comparative Examples.

Examples 1 to 12 and Comparative Examples 1 to 16 Powder components and nonflammable liquids of extinguishing agents shown in Table 1 were placed in a nearly cylindrical pressure-resistant container made of aluminum and having a body diameter shown in Table 1 and an internal volume of about 350 m1. After quantitative filling, an aerosol valve having a lower end having the shape shown in Table 1 was attached. Thereafter, a predetermined amount of the nonflammable liquefied gas shown in Table 1 was filled from the stem of the valve, and a spout for an aerosol type simple fire extinguisher was attached to produce an aerosol product (aerosol type simple fire extinguisher).

The resulting aerosol product was measured for its fire extinguishing performance, safety to humans, stability of a pressure vessel, and remaining amount of spray by the following methods, and the performance of the aerosol product was comprehensively judged. The results are shown in Table 1.

Note that the shape of the lower end of the dip tube of the aerosol valve is A, as shown in Figure 1, the inverted wave-shaped opening is molded integrally with the dip tube, and the outer diameter of the reverse wave-shaped opening is 20 mm. , the outer diameter of the middle part of the dip tube is 9
2mm, and the opening is placed at a height of 2mm from the bottom of the can. B is the one in which the inverted wave-shaped opening and the dip tube are separately molded, as shown in Figure 2. , which are connected to each other, with four cuts of 4 mm width made on the rim of the opening, an outer diameter of 25 mm, and a dip tube with an outer diameter of 10 mm, which is tightly attached to the bottom of the can. 0 is the aerosol valve used in the present invention used in B, with the lower end funnel-shaped opening installed at a position 2 mm from the bottom of the can, and D is the inverted filter-shaped opening, as shown in Figure 3. A dip tube and a dip tube are molded separately, and these are connected. Eight holes with a diameter of 3 mm are made on the rim of the opening, and the outer diameter of the dip tube is 9 mm. This is attached to the bottom of the can. The one that is in close contact, E, is a normal dip tube.

(Fire extinguishing performance) Using aerosol products immediately after manufacture, we tested tempura oil, curtains,
Cushions, baskets, kerosene stoves and cars 6
The fire extinguishing performance was measured for various types of fires, and cases where the performance was good were judged as bad, and cases where the O1 was poor were judged as ×.

(Safety for humans) Measure the pH of an aqueous solution of powder components used in fire extinguishing agents, and
Cases where H was 10 or less were rated ○ (safe), and others were rated △.

(Stability of pressure container) The obtained aerosol product was heated to a temperature of 40°o1 and a relative humidity of 60°C.
If stored in a constant temperature and humidity chamber for 3 months, the temperature will reach 40o.
The stability was measured under two conditions: when stored in a constant temperature and humidity chamber at 90% relative humidity for 3 months, and when the condition of the pressure container was good under both conditions, the stability was measured under the conditions after 01 A case where the condition was defective only was rated as △, and a case where the condition was defective under both conditions was graded as ×.

(Residual injection amount) After storing the obtained aerosol product at a constant temperature of 45 months for 6 months, it is gently cooled to OOO and injected at 0 temperature, so that the ratio of the remaining injection amount to the initial filling amount is less than 10%. ○
, 10 to 15% was rated Δ, and cases exceeding 15% were rated X.

(Comprehensive judgment) If the fire extinguishing performance, safety for human body, and remaining injection amount are all ○, and the pressure vessel stability is 0 or △, the rating is 01×.
There were no items where the stability of the pressure-resistant container was O or Δ, and other items had Δ&fair, and the other items were rated Δ, and other cases were rated ×.

Also, Thyroid 65 in Table 1 is Fuji Davison Chemical■
It is a finely powdered silica manufactured by.

In Comparative Example 10, the powder did not settle but floated, so a mixed layer of powder and stock solution was formed in the upper layer.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing an embodiment of the aerosol product of the present invention, and FIGS. 2 and 3 are schematic cross-sectional views showing embodiments of a dip tube with an inverted funnel-shaped lower end used in the present invention. An explanatory diagram, Fig. 4 is a product explanatory diagram to explain the movement of the contents when an example of the aerosol product of the present invention is used, and Fig. 5 shows the movement of the contents when a conventional aerosol product is used. It is an explanatory diagram for explaining. (Main symbols in the drawings) (1): Aerosol product (2): Pressure-resistant container (8): Dip tube (4): Reverse wave-shaped part (5a): Layer in which powder and stock solution are mixed (5b) :
Stock solution (7): Notch (8): Hole (9): Aerosol valve No. 41 Figure 5

Claims (1)

[Claims] 1. Z 7 in which the 7 ends of the dip tube are shaped like an inverted funnel.
An aerosol product characterized in that the contents of the aerosol product are sealed in a pressure-resistant container equipped with a V-leharbe. 2. The aerosol product according to claim 1, wherein the aerosol product contents include a powder, a stock solution, and a propellant. 6. The aerosol product according to claim 1, wherein the aerosol product content comprises a powder and a propellant. 4. The aerosol product contents include 10 to 40 parts by weight of a powder containing heavy carbon as a main component and an alkali metal salt, and 55 to 85 parts by weight of a nonflammable liquid containing dibromotetrafluoroethane as a main component.
The aerosol product according to claim 1 or 2, which is a fire extinguishing agent consisting of 5 to 20 parts by weight of a nonflammable liquefied gas. 5. The aerosol according to claim 1, wherein the inverted funnel-shaped opening at the lower end of the dip tube is an inverted funnel-shaped opening having one or more notches on the outer edge of the inverted funnel-shaped opening. product.