JPH11188117A - Fire extinguishing agent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate an adverse influence on the human body and metals by incorporating potassium bicarbonate, potassium chloride, 1-2-3 benzotriazole, sodium molybdate, ethylene glycol, urea, phosphoric acid and fluorine surfactant into a fire extinguishing agent compsn. SOLUTION: The potassium bicarbonate and potassium chloride which exhibit a fire extinguishing effect by forming a gelatinous reactant to a frying oil fire and the fluorine surfactant which exhibits fire extinguishing performance by forming a frothy material to the surface of the frying oil fire are incorporated into the fire extinguishing agent compsn. Further, the 1-2-3 benzotriazole and sodium molybdate having a rust preventive effect and an effect of improving soln. stability and the urea and ethylene glycol as a soln. stability improving agent and the phosphoric acid to stabilize the soln. by making its pH neutral are incorporated therein. As a result, the fire extinguishing agent compsn. is made to exhibit the excellent fire extinguishing effect to various fires including the frying oil fire and is made to have the lower corrosiveness to the metals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fire A (wood fire) and a fire B (gasoline fire) specified in the Fire Service Law.
C fire (fire involving electric system) and tempura oil fire
Water-based fire extinguisher composition that is safe and has high fire-extinguishing ability against stove fire (kerosene fire), curtain fire (acrylic fiber, etc.), waste basket fire (paper fire), cushion fire (urethane foam, etc.), tire fire Things.

[0002]

2. Description of the Related Art In recent years, tempura oil fires and stove fires have been increasing especially as domestic fires. Tempura oil does not ignite or combust at normal operating temperatures (about 200 ° C). However, at about 350 ° C., spontaneous ignition occurs and a fire occurs. Tempura oil fires that have spontaneously ignited have high temperatures, high flames and very dangerous combustion. Oil stoves are widely used as a means of heating, but if they fall down or leak during refueling, they will ignite kerosene and cause a fire. In many cases, tatami and paper are burned at the same time as kerosene, and fires are particularly necessary in the early stages.

Conventionally, as a fire extinguishing agent widely used,
There are powder type, gas type and water type. Typical powder-based fire extinguishing agents include ABC powder extinguishing agents and BC powder extinguishing agents, water-based extinguishing agents include mechanical foam extinguishing agents and enhanced liquid extinguishing agents, and gas-based extinguishing agents include carbon dioxide extinguishing agents. .

[0004]

However, such a fire extinguishing agent is effective for fires A, B, C and the like as defined in the Fire Services Act, but it is hard to say that it can sufficiently cope with a tempura oil fire.

That is, since ABC powder and BC powder have no effect of cooling the temperature of the burning tempura oil, they reignite immediately even if the fire is suppressed momentarily, and are burned and used. I can't. In addition, if a general mechanical foam extinguishing agent is released into burning tempura oil, the fire cannot be extinguished and bumping occurs, which is dangerous. The fire-extinguishing liquid fire extinguishing agent can react with tempura oil to extinguish the fire, but when the fire extinguishes, the flame rises and is often dangerous, and the liquid (p
H) shows high alkalinity, so it is dangerous to come into contact with skin and the like. Further, the carbon dioxide fire extinguishing agent has no cooling effect and has no chemical extinguishing action, so that it cannot extinguish the fire at all.

In recent years, the fire extinguisher composition for tempura oil fires disclosed in JP-A-60-142869 and JP-A-1-166777 has been marketed as "neutral strengthening liquid fire extinguishing agent". When used for tempura oil fires,
Fire extinguishing is possible, as is the case with the reinforced liquid fire extinguisher, but it is dangerous because the flame rises. Stove fires cannot be extinguished effectively with powder-based or gas-based extinguishing agents. Also, the conventionally used reinforcing liquid fire extinguishing agent cannot extinguish a stove fire.

As described above, "tempura oil fire" and "stove fire", which are the most common household fires,
There is no extinguishing agent that can extinguish a fire effectively in a small amount, and it is the present situation that its appearance is desired.

Based on the present situation, the present invention is applicable not only to "tempura oil fire" and "stove fire" but also to A fire, B fire, C fire, curtain fire, basket fire, cushion fire and tire fire. An object of the present invention is to provide a good fire extinguisher composition that acts effectively even with a small amount of corrosiveness to the human body, the environment, and metals such as steel and aluminum.

[0009]

The fire extinguishing agent composition according to the present invention comprises potassium bicarbonate / potassium chloride / 1-2-3-benzotriazole, sodium molybdate / ethylene glycol / urea / phosphoric acid / fluorinated surfactant.・ Extract from plant ・ Potassium tetraborate ・ Potassium acetate, more than 7 kinds were contained, and it was the first time that knowledge of the fire extinguisher composition which was the initial purpose was obtained with a limited amount of combination. . The composition of the present invention is to extinguish "1 liter or 0.5 liter of fire extinguishing agent" by spraying it out of a pressure vessel in the event of a fire.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The fire extinguisher composition of the present invention is not limited to tempura oil fires and stove fires but also A fires, B fires, C fires and curtains for the first time depending on the limited combination and content of the substances described in detail below. It works effectively against fires, trash basket fires, cushion fires, and tire fires, and provides good results for the human body, environment, and corrosiveness.

The range of the added amount of the substance used in the present invention and the effect thereof will be described. Potassium bicarbonate produces a gel-like reactant against a tempura oil fire and exhibits a fire-extinguishing effect. The added amount of 2.5 to 10.0% is the optimum range. If it is less than 2.5%, the fire extinguishing effect cannot be expected,
If it is 10.0% or more, no further effect of the fire extinguishing effect can be expected, and the solution becomes unstable and precipitates.

[0012] Potassium chloride is effective in forming reactants against tempura oil fires. In addition, it exhibits a fire-extinguishing effect by chemical action against general fires (wood, paper, etc.). The optimum range of the addition amount is 5.0 to 10.0%. If it is less than 5.0%, the fire extinguishing effect is low, and 10.0%
Above, a remarkable improvement in the fire extinguishing effect cannot be expected, and inconveniences such as an increase in corrosiveness occur.

The fluorine-based surfactant is Rodyne F312.
A (manufactured by Ciba-Geigy) is most useful, has a fire-extinguishing effect by forming a foamy substance on the surface of a tempura oil fire, and improves fire-extinguishing performance by improving permeability to general fires. In addition, it produces a tough foam against oil fires such as kerosene and gasoline, so that it exhibits a remarkable fire-extinguishing effect. At the same time, it has the effect of stabilizing the fire extinguishing agent solution because it has a chelating effect. The addition amount is desirably 1.5 to 2.0%.
Preferably, an addition amount of 2.0% is optimal. If it is 1.5% or less, the predetermined fire extinguishing performance cannot be exhibited. On the other hand, if the content is 2.0% or more, a remarkable improvement in effect cannot be expected, and the cost is increased because the substance is expensive.

The rust preventives of 1-2-3 benzotriazole and sodium molybdate have the effect of improving the rust preventive effect and the stability of the solution. Particularly, it exerts an excellent rust-preventing effect on potassium chloride, which has an effective fire-extinguishing effect but has a strong corrosive property, without impairing the fire-extinguishing effect. Usually, 20% of each is contained in an appropriate solvent is used (referred to as a rust inhibitor solution). The added amount range of the rust inhibitor solution is 1.0 to 1.5%. Preferably 1.0%
It is. If it is less than 1.0%, no rust-preventive effect (especially when potassium chloride is used) can be expected. If the content is 1.5% or more, the rust prevention effect cannot be further improved and the fire extinguishing performance may be adversely affected.

Urea is added to improve the stability of the solution. The amount added is in the range of 4.0 to 10.0%. If it is less than 4.0%, the desired effect cannot be expected. 1
If the content is 0.0% or more, the predetermined effect is adversely affected, the stability of the solution is deteriorated, and a precipitate may be formed at a low temperature.

Ethylene glycol has the effect of improving the stability of the solution at low temperatures and improving the fire extinguishing performance against kerosene and gasoline. 4.0 to 10.0% is the optimum range of the addition amount. If it is less than 4.0%, the desired effect cannot be expected. If it is 10.0% or more, the performance effect on the fire A and the fire on the tempura oil is deteriorated, which causes inconvenience.

The conventional fire extinguisher composition is weakly alkaline, which is inconvenient for the human body and the environment. For this purpose, the composition of the present invention is made liquid (pH) by adding an aqueous phosphoric acid solution.
And the stability of the solution is improved.
At the same time, it has the effect of improving performance against A fire and stove fire. The range of addition is 0.2-2.3%.

Liquids extracted from plants such as eucalyptus resin and alfalfa are used as anti-inflammatory agents for burns. This plant extract has the effect of lowering the temperature and reacting with smoke. As a result of adding and experimenting as a fire extinguishing agent, it was particularly useful for tempura oil fires. This effect has the effect of forming a film with the tempura oil and remarkably lowering the temperature of the tempura oil at the time of fire extinguishing, and is useful for the performance of preventing re-ignition after extinguishing. Further, the effect of suppressing smoke generated at the time of fire is remarkable. The range of addition is 1.0-5.0%. If it is less than 1.0%, the intended effect cannot be exhibited.
If the content is 5.0% or more, a remarkable improvement in the effect cannot be expected, and the solution becomes unstable.

Potassium tetraborate has a fire extinguishing effect by forming a reactant with tempura oil. The optimal amount is 2.0
~ 4.0%. If it is 2.0% or less, the effect on the tempura oil fire is reduced. At a content of 4.0% or more, a remarkable improvement in effect cannot be expected, and the stability of the solution becomes poor.
This produces a precipitate.

Potassium acetate has an excellent fire-extinguishing effect because it produces a gel-like reactant with tempura oil, and has a function of lowering the freezing point and improving the stability of the solution. Effective addition amount is 15.0-20.0%
It is. Preferably, 18.0% is optimal. 15.0
%, The effect on tempura oil fires is small,
If the content is 0.0% or more, the fire extinguishing performance against general fires (wood, paper, etc.) is significantly impaired, which causes inconvenience as a fire extinguishing agent.

As described above, the composition of the present invention can be extracted from potassium bicarbonate / potassium chloride / 1-2-3-benzotriazole, sodium molybdate / ethylene glycol / urea / phosphoric acid / fluorinated surfactant / plant. From the liquid, potassium tetraborate and potassium acetate, seven or more kinds were contained, and only in a limited amount, the fire extinguisher composition as an initial purpose was completed.

[0022]

EXAMPLES Next, the fire extinguisher composition of the present invention will be described with reference to examples. Table 1 shows the composition (specific components) of each example.

[0023]

[Table 1]

Next, Table 2 shows comparative examples (compositions) with the above examples.

[0025]

[Table 2]

Using a composition based on each of the above Examples and Comparative Examples, a household fire extinguisher was charged 1 liter at a time,
A tempura oil fire test was performed using nitrogen gas as the discharge pressure.
The test was performed in accordance with the ministerial ordinance specified in the technical standards for fire extinguishers. That is, 1 liter of soybean oil was placed in a wok of 30 cm in diameter and 7.5 cm in depth and heated and ignited by a gas stove, and fire extinguishing was started when the oil temperature reached 400 ° C. The fire extinguishing time, the rise of the flame at the time of fire extinguishing, the presence or absence of reburn after extinguishing, and the presence or absence of reaction products after extinguishing were examined. Table 3 shows the results.

[0027]

[Table 3]

Further, using the compositions based on each of the above Examples and Comparative Examples, household fire extinguishing equipment was filled in 0.5 liter portions, and a stove fire (kerosene) tempura oil fire test was conducted using nitrogen gas as a discharge pressure. Was done. The test was performed based on the evaluation standard of aerosol type fire extinguisher. That is, as a model of the oil stove, width 70cm depth 40cm depth 2c
m 40cm in depth 20cm height 50
cm iron box was placed, 1 liter of kerosene and 100 ml of heptane were placed in a fire tray, ignited, pre-burned for 1 minute, and then fire extinguishing test was started. The fire extinguishing time and the test for the presence or absence of relapse after the extinguishing were performed. Table 4 shows the results.

[0029]

[Table 4]

Further, a fire extinguisher for home use was filled 1 liter at a time using the compositions based on each of the above-described Examples and Comparative Examples, and fire A (wood fire) was performed using nitrogen gas as a discharge pressure.
The test was performed. The test was carried out in accordance with the ministerial ordinance that specifies the technical standards for fire extinguishers. That is, a cedar air desiccant with a length of 45 cm, a width of 3 cm and a height of 3.5 cm (water content: 10 to 15%)
Five, five, four, four, ... four, four are assembled in a girder shape, placed on a pedestal with a height of 30 cm and a width of 45 cm x 45 cm, and burn for 3 minutes using 600 cc of heptane as a pre-combustion agent After the extinguishing, the fire extinguishing was started, and a test was performed to determine whether or not there was re-ignition after the extinguishing and the fire extinguishing condition. Table 5 shows the results.

[0031]

[Table 5]

Further, a liquidity (pH) test was carried out using the compositions based on each of the above Examples and Comparative Examples in accordance with a ministerial ordinance which stipulates technical standards for fire extinguishing agents. Table 6 shows the results.

[0033]

[Table 6]

Further, a corrosion test was carried out using the compositions based on each of the above Examples and Comparative Examples. That is, aluminum and steel (the size of each test piece is 75 mm ×
12mm x 10mm) into 100cc fire extinguishing agent at 38 ° C
For 21 days to test the condition of the test piece and the condition of the immersed fire extinguishing agent. Table 7 shows the results.

[0035]

[Table 7]

As is clear from the above examples, the fire extinguisher composition according to the present invention exhibits an excellent fire extinguishing effect against tempura oil fires, stove fires and wood fires, and has a neutral pH. In addition, it is less corrosive to metals such as steel and aluminum and can be used safely as a fire extinguishing agent for home use, and also provides an environmentally friendly fire extinguishing agent.

[0037]

As described above, according to the present invention, the present invention is effective not only for tempura oil fires and stove fires but also for A fires, B fires, C fires, curtain fires, trash basket fires, cushion fires, and tire fires. It has an effect that a good fire extinguisher composition can be obtained which acts and is less corrosive to the human body, the environment, and metals such as steel and aluminum.

Claims (5)

[Claims] 1. Potassium bicarbonate, potassium chloride, 1-2
-3. A fire extinguisher composition containing benzotriazole, sodium molybdate, ethylene glycol, urea, phosphoric acid, and a fluorine-based surfactant. 2. The fire extinguisher composition according to claim 1, further comprising an extract from a plant. 3. Potassium tetraborate, potassium acetate, 1-
2-3 benzotriazole, sodium molybdate,
A fire extinguisher composition characterized by containing ethylene glycol, urea, phosphoric acid, and a fluorine-based surfactant. 4. The fire extinguisher composition according to claim 3, further comprising an extract from a plant. 5. The fire extinguisher composition according to claim 4, further comprising potassium bicarbonate.