CN1083281C - Fire extinguishing agent of aerosol - Google Patents

Abstract

A kind of aerosol fire extinguishing agent, it comprises oxidizing agent, combustion agent, composite catalyst and molding aid, by weight percentage, the formula of this fire extinguishing agent is: oxidizing agent: potassium nitrate and/or sodium nitrate 50-70%, combustion agent 20% -30%, 2-10% composite catalyst and 5-20% curing molding aid, wherein said combustion agent is selected from polycarbon alcohols above six-carbon alcohols and polymer compounds containing amino groups; said composite The catalyst is a mixture of ferrocene and potassium sulfate. The fire extinguishing agent has high fire extinguishing efficiency and fast fire extinguishing speed, does not harm human body, animals and objects, and has no destructive effect on the atmospheric ozone layer. In addition, it has stable non-detonation performance, and it will not detonate under extremely strong detonation conditions and has good physical and chemical stability.

Description

New aerosol fire extinguishing agent

The present invention relates to a kind of novel fire extinguishing agent, relate to novel aerosol fire extinguishing agent more specifically.

Aerosol-type fire extinguishing agent is a newly developed type of fire extinguishing agent in the field of fire extinguishing. It forms aerosol products by burning the fuel in the fire extinguishing agent, so as to achieve the purpose of fire extinguishing. Prior art such as the CN1166996A patent of Russia, its aerosol fire extinguishing agent formula is the dicyandiamide of 62-72% potassium nitrate, 8-12% phenolic resin and surplus, owing to wherein containing the compound dicyandiamide of band cyano group, in During the combustion process, toxic substances such as cyanate will be produced, which will cause harm to the human body and the surrounding environment. The fire extinguishing agent formula of the Russian patent RU2058800 contains a large amount of perchlorate, which will produce strong corrosion and be seriously harmful to people and objects. In addition, the existing aerosol-type fire extinguishing agent has low fire extinguishing efficiency, and there is a possibility of being detonated, and the safety is poor. Also disclose a kind of aerosol fire extinguishing agent in the prior patent application CN9310587.6 (being in examination process) of the inventor, it is mainly made of oxidizing agent such as potassium nitrate and sodium nitrate, combustion agent such as iditol etc., curing Forming agent, a major problem of this fire extinguishing agent is that the fire extinguishing efficiency is low and the fire extinguishing speed is not fast, and the additives adopted therein, such as potassium ferricyanide, all have toxicity problems during production and use.

Purpose of the present invention is just a kind of novel aerosol fire extinguishing agent designed in order to avoid the deficiencies of the above-mentioned prior art. The fire extinguishing agent has high fire extinguishing efficiency, fast fire extinguishing speed, good non-detonation performance and good safety.

Said novel aerosol fire extinguishing agent of the present invention comprises oxidizing agent, burning agent, composite catalyst and forming aid, and by weight percentage, the prescription of this fire extinguishing agent is: oxidizing agent: potassium nitrate and/or sodium nitrate 50-70%, burning 20-30% of the catalyst, 2-10% of the composite catalyst and 5-20% of the curing molding aid, wherein said combustion agent is selected from polycarbon alcohols above six-carbon alcohols and polymer compounds containing amino groups; said The composite catalyst is a mixture of ferrocene and potassium sulfate, preferably wherein the weight ratio of ferrocene and potassium sulfate is 4:1.

The aerosol fire extinguishing agent of the present invention is characterized by high fire extinguishing efficiency, fast fire extinguishing speed, no harm to human body, animals and objects, and no damage to atmospheric ozone layer. In addition, it has stable non-detonation performance, and the fire extinguishing agent will not detonate under extremely strong detonation conditions. Measured by the National Laboratory for Explosion Disaster Prevention and Control, under the conditions of detonating the fire extinguishing agent of the present invention using No. 8 military electric detonators, TNT explosives and 8701 high-energy explosives, detonation will not occur. This is an important feature that distinguishes it from other aerosol-type fire extinguishing agents. This has just prevented the possibility that aerosol fire extinguishing agent is utilized as other illegal purposes well. This point is an important condition for whether the aerosol fire extinguishing agent can be widely used.

In addition, the fire extinguishing agent of the present invention has been tested and proved to have good physical and chemical stability. It has been proved by relevant animal experiments that the animals subjected to the experiment under the condition of twice the fire extinguishing dose survived well after long-term observation without any adverse reaction. Now the fire extinguishing agent of the present invention is compared with the minimum fire extinguishing consumption of several fully submerged type fire extinguishing agents, and the results are listed in the following table:

Fire extinguishing agent consumption comparison Extinguishing agent type Minimum fire extinguishing dosage (g/m ³ ) Flammable liquids (kerosene, petrol) polyurethane foam Combustible materials (wood, paper, cotton) of the present invention 30 30 30～40 CTK 50～70 80～120 50～70 Freon 1301 200～205 205～235 Freon 1211 235～260 260～290 Note: CTK is an aerosol fire extinguishing agent produced in Russia

The combustion agent in the aerosol fire extinguishing agent formula of the present invention is a polycarbonate alcohol with six carbon alcohols or more and other polymer compounds containing amino groups, such as: 5-aminotetrapyrrole and cyclohexanehexanol. As the curing molding aid, commonly used molding binders in this field can be used, preferably selected from epoxy resin and other polymer binders.

The present invention has improved fire extinguishing efficiency and fire extinguishing speed owing to adopting unique composite catalyst, and this is an important part that the present invention is different from the prior art, and it also makes the present invention avoid using toxic components such as potassium ferricyanide, thereby Improve the safety of the human body and the surrounding environment. The composite catalyst of the present invention can adopt coated ferrocene, such as a mixture of ferrocene microcapsules and potassium sulfate.

After the coated ferrocene is mixed with potassium sulfate, it will have a greater impact on the initial stage of the combustion product and the final product. The composite catalyst keeps the combustion conditions in a stable state and makes the final product move towards the direction that is conducive to improving fire extinguishing. state of efficiency.

The present invention is described below through examples, and it should be understood that these examples are only for illustration, rather than limiting the present invention.

Example 1:

First, the ferrocene powder below 100 μm is coated with polyvinyl alcohol to form ferrocene microcapsules. The coated ferrocene is mixed with potassium sulfate below 5 μm in a weight ratio of 4:1 to prepare the composite catalyst of the present invention.

Weigh 50 kg of potassium nitrate and 15 kg of sodium nitrate, and pulverize them into powders below 5 μm. Then get 20 kilograms of cyclohexanehexanol and mix with 5 kilograms of the composite catalyst prepared above and pulverize into powder below 5 μm. Then, after mixing the above two kinds of powders, add 10 kg of epoxy resin and knead them to be solidified and formed.

Example 2:

Take by weighing 65 kilograms of potassium nitrate and 25 kilograms of cyclohexanehexanol, they are respectively pulverized into powders below 5 μm, and another 3 kilograms of composite catalysts prepared in above example 1 are mixed with the above-mentioned two kinds of powders, to be mixed After uniformity, add 7 kg of epoxy resin, and then it can be cured and formed after kneading.

Example 3

Get 65 kilograms of potassium nitrate and 20 kilograms of 5-aminotetrapyrrole, they are pulverized into the powder below 5 μm, get 5 kilograms of composite catalysts obtained in the above example 1 and mix with above-mentioned two kinds of powders, then add 10 kilograms Epoxy resin, cured after kneading.

Claims (5)

1. An aerosol fire extinguishing agent, which comprises oxidant, combustion agent, composite catalyst and forming aid, in weight percentage, the formula of this fire extinguisher is: oxidant: potassium nitrate and/or sodium nitrate 50-70%, burning 20-30% of the catalyst, 2-10% of the composite catalyst and 5-20% of the curing molding aid, wherein said combustion agent is selected from polycarbon alcohols above six-carbon alcohols and polymer compounds containing amino groups; said The composite catalyst is a mixture of ferrocene and potassium sulfate. 2. The aerosol fire extinguishing agent according to claim 1, wherein said composite catalyst is a mixture of ferrocene and potassium sulfate, and the weight ratio of the two is 4: 1. 3. The aerosol fire extinguishing agent according to claim 1 or 2, wherein said composite catalyst is the mixture of coated ferrocene microcapsules and potassium sulfate. 4. The aerosol fire extinguishing agent according to claim 1, wherein said combustion agent is selected from 5-aminotetrapyrrole and cyclohexanehexanol. 5. The aerosol fire extinguishing agent according to claim 1, wherein the curing forming aid used is selected from epoxy resins.