FIRE EXTINGUISHING AEROSOL COMPOSITION FOR PRECISION ELECTRIC APPLIANCES

• US 20100219366A1
• Filed: 11/14/2007
• Published: 09/02/2010
• Est. Priority Date: 07/10/2007
• Status: Active Grant

• Current Assignee: Shaanxi J & R Fire Fighting Co., Ltd.
• Original Assignee: Shaanxi J & R Fire Fighting Co., Ltd.
• Inventors: Guo, Hongbao, Zhang, Zanfeng
• Granted Patent: US 8,231,801 B2
• Time in Patent Office: Days
• US Class Current: 252/2
• CPC Class Codes: A62C 3/16 in electrical installations, e.g. cableways
• CPC Class Codes: A62D 1/0092 Gaseous extinguishing substances, e.g. liquefied gases, carbon dioxide snow freons or halons A62D1/005
• CPC Class Codes: A62D 1/06 containing gas-producing, chemically-reactive components

Abstract

A fire-extinguishing aerosol for precision electric appliance is disclosed, which includes oxidant, flammable agent, adhesive and additive. The composition of the present invention is characterized in that the oxidant is the mixture of the potassium salt and the strontium salt, in which the content of the potassium salt oxidant is more than or equal to 5 mass % to less than 15 mass % of the total mass of the composition, and the content of the strontium salt oxidant is more than 52 mass % to less than or equal to 60 mass % of the total mass of the composition. In the fire-extinguishing aerosol composition of the present invention, the particle average diameter of all components is less than 50 μm. After quenching the fire in the space in which the precision electric appliance is installed, the fire-extinguishing aerosol composition of the present invention can ensure that the dielectric resistance of the precision electric appliance is more than or equal to 100 MΩ. The fire-extinguishing aerosol composition of the present invention is more reasonable than the prior art, friendly to the environment, and applicable to the precision electric appliance.

Claims

1. A fire-extinguishing aerosol composition suitable for precision electric appliances, which comprises an oxidant, a flammable agent, an adhesive and an additive, characterized in that the oxidant in the fire-extinguishing aerosol composition is a mixture of a potassium salt oxidant and a strontium salt oxidant;

the flammable agent is one member or a combination of several members selected from the group consisting of guanidine nitrate, aminoguanidine nitrate, triaminoguanidine nitrate, and diaminoguanidine nitrate;

the additive is one member or a combination of several members selected from the group consisting of aluminum powder, magnesium powder, carbon powder, magnesium carbonate, calcium carbonate and potassium feldspar;

the adhesive is one member or a combination of several members selected from the group consisting of phenolic resin, epoxy resin and acrylic resin; and

the content of each component in percent by mass in the fire-extinguishing aerosol composition is as follows;

potassium salt oxidant;

more than or equal to 5% to less than 15%;

strontium salt oxidant;

more than 52% to less than or equal to 60%;

flammable agent;

10% to 25%;

additive;

 

2% to 20%;

adhesive;

 

2% to 20%.

2. The fire-extinguishing aerosol composition suitable for precision electric appliances according to claim 1, characterized in that said strontium salt is one member or a combination of several members selected from the group consisting of strontium nitrate, strontium oxide, strontium carbonate, strontium sulfite, strontium pyrophosphate, strontium permanganate, strontium bromide, strontium bichromate, strontium molybdate and strontium hexaboride.

3. The fire-extinguishing aerosol composition suitable for precision electric appliances according to claim 1, characterized in that said potassium salt is one member or a combination of several members selected from the group consisting of potassium nitrate, potassium chlorate, potassium perchlorate, potassium chloride, potassium carbonate and potassium citrate.

4. The fire-extinguishing aerosol composition suitable for precision electric appliances according to any one of claims 1 to 3, characterized in that said potassium salt oxidant is partially or wholly replaced by one member or a combination of several members selected from the group consisting of sodium bicarbonate, sodium nitrate, sodium perchlorate, ammonium nitrate, ammonium perchlorate, barium nitrate and cesium nitrate.

5. The fire-extinguishing aerosol composition suitable for precision electric appliances according to any one of claims 1 to 3, characterized in that said flammable agent is partially or wholly replaced by one member or a combination of several members selected from the group consisting of pentaminotetrazole and a salt thereof ditetrazole and a salt thereof, diazoaminotetrazole and a salt thereof, diazotetrazole dimer and a salt thereof.

6. The fire-extinguishing aerosol composition suitable for precision electric appliances according to any one of claims 1 to 3, characterized in that said additive is partially or wholly replaced by one member or a combination of several members selected from the group consisting of potassium catechol borate and a salt thereof, hydroxybenzoic acid and a salt thereof, benzoic acid and a salt thereof, palmitic acid and a salt thereof, ammonium nitrate, potassium perchlorate, potassium chloride, copper oxide, iron oxide, copper phthalocyanine, potassium ferricyanide and hexamethylenetetramine.

7. The fire-extinguishing aerosol composition suitable for precision electric appliances according to any one of claims 1 to 3, characterized in that said adhesive is partially or wholly replaced by one member or a combination of several members selected from the group consisting of polytetrafluoroethylene, ethylene polymer, nitrocellulose, glyceryl triacetate, polyvinyl acetate and melamine resin.

8. The fire-extinguishing aerosol composition suitable for precision electric appliances according to any one of claims 1 to 7, characterized in that the maximum average diameter of particles of said oxidant, flammable agent, adhesive and additive is within 50 μ

m.

9. The fire-extinguishing aerosol composition suitable for precision electric appliances according to any one of claims 1 to 7, characterized in that after using said fire-extinguishing aerosol composition for suppressing fire in a space equipped with precision electric appliances, the insulation resistance of the precision electric appliances is more than or equal to 100 MΩ

.

10. The fire-extinguishing aerosol composition suitable for precision electric appliances according to any one of claims 1 to 7, characterized in that said composition comprises:

potassium nitrate;

 

5%~14% strontium nitrate;

52%~60% guanidine nitrate;

10%~25% aluminum powder;

 

2%~10% phenolic resin;

 

 

2%~10%.

11. The fire-extinguishing aerosol composition suitable for precision electric appliances according to any one of claims 1 to 7, characterized in that said composition comprises:

potassium perchlorate;

 

5%~14% strontium oxide;

52%~60% aminoguanidine nitrate;

10%~25% hexamethylenetetramine;

 

2%~10% epoxy resin;

 

 

2%~10%.

12. The fire-extinguishing aerosol composition suitable for precision electric appliances according to any one of claims 1 to 7, characterized in that said composition comprises:

potassium carbonate;

 

5%~14% strontium pyrophosphate;

52%~60% pentaminotetrazole or a salt thereof;

10%~25% copper oxide;

 

2%~10% acrylic resin;

 

 

2%~10%.

13. The fire-extinguishing aerosol composition suitable for precision electric appliances according to any one of claims 1 to 7, characterized in that said composition comprises:

potassium chlorate;

 

5%~14% strontium bichromate;

52%~60% diazoaminotetrazole or a salt thereof;

10%~25% copper phthalocyanine;

 

2%~10% epoxy resin;

 

 

2%~10%.