Chemically active fire suppression composition

• US 6,024,889 A
• Filed: 01/29/1998
• Issued: 02/15/2000
• Est. Priority Date: 01/29/1998
• Status: Expired due to Term

• Current Assignee: Aerojet Rocketdyne Inc. (L3Harris Technologies, Inc.)
• Original Assignee: Prime Technology Incorporated (General Dynamics Corporation)
• Inventors: Wilson, Michael A., Holland, Gary F.
• Primary Examiner(s): Brouillette, D. Gabrielle
• Assistant Examiner(s): CROSS, LATOYA I
• Application Number:
  US09/015,359
• Time in Patent Office: 747 Days
• Field of Search: 252/4, 252/5, 252/7, 169/46, 169/12, 169/26, 169/61, 149/61
• US Class Current: 252/5
• CPC Class Codes: A62D 1/06 containing gas-producing, chemically-reactive components
• CPC Class Codes: C06D 5/06 by reaction of two or more solids

Abstract

The invention is directed to a chemically active fire suppression composition, comprising a propellant comprising a fuel and an oxidizer, the propellant capable of generating inert gas; and an environmentally innocuous chemical fire suppressant capable of generating fire suppressive reactive species. The combination of physically acting fire suppression agents and chemically acting, environmentally innocuous fire suppression agents results in a highly effective, environmentally innocuous fire extinguishing composition that has low ozone depletion potential (ODP), low global warming potential (GWP), and high suppression efficiency.

Claims

1. An apparatus for suppressing a fire, comprising:

(a) a first container containing a propellant comprising a fuel and an oxidizer, said fuel comprising from about 10 to about 50% by weight, based on the total weight of said composition, said oxidizer comprising from about 20 to about 90% by weight, based on the total weight of said composition, said propellant capable of generating inert gas;

(b) a second container connected to said first container by a passageway, said second container containing a coolant and an environmentally innocuous chemical fire suppressant capable of generating fire suppressive reactive species, said environmentally innocuous chemical fire suppressant selected from the group consisting of potassium iodide, potassium bromide, lithium chloride, potassium iodate, potassium nitrate, potassium bromate, sodium nitrate, lithium perchlorate, ammonium nitrate phase-stabilized with potassium nitrate (AN/KN), and combinations thereof, said chemical fire suppressant comprising from about 5 to about 40% by weight, based on the total weight of said composition; and

(c) an outlet between said second container and said fire.

2. The apparatus of claim 1, wherein said fuel is selected from the group consisting of 5-aminotetrazole or salts thereof, bitetrazole or salts thereof, diazoaminotetrazole or salts thereof, diazotetrazole dimer or salts thereof, guanidine nitrate, aminoguanidine nitrates, nitroguanidine, 5-nitro-1,2,4-triazol-3-one, triaminoguanidinium, diaminoguanidinium, and combinations thereof.

3. The apparatus of claim 1, wherein said oxidizer is selected from the group consisting of alkali metal nitrates, alkaline earth nitrates, phase stabilized ammonium nitrates, perchlorates, iodates, bromates, and combinations thereof.

4. The apparatus of claim 1, wherein said chemically active fire suppression composition further comprises a coolant.

5. The apparatus of claim 1, wherein said second container further comprising a coolant.

6. The apparatus of claim 5, wherein said coolant is MgCO₃.