Flame suppressant aerosol generant

• US 8,182,711 B2
• Filed: 03/08/2011
• Issued: 05/22/2012
• Est. Priority Date: 04/30/2004
• Status: Active Grant

• Current Assignee: Goodrich Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Goodrich Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Posson, Philip L., Clark, Mark L.
• Primary Examiner(s): ANTHONY, JOSEPH DAVID
• Application Number:
  US13/043,010
• Publication Number:
  US 20110155943A1
• Time in Patent Office: 441 Days
• Field of Search: None
• US Class Current: 252/5
• CPC Class Codes: A62D 1/06 containing gas-producing, chemically-reactive components
• CPC Class Codes: Y10S 149/115 Organic fuel

Abstract

The present invention is directed to pyrotechnic aerosol fire suppression compositions that burn rapidly, but coolly. The rapid burning of the compositions of the present invention produces a voluminous flame-suppressive aerosol that is useful in suppressing and/or extinguishing both small and large fires. The compositions of the invention contain at least one oxidizer and a fuel component comprising at least one organic acid salt, which combination produces a rapid burning composition that burns at low temperatures with little or no flame and have a low heat of combustion.

Claims

1. A pyrotechnic aerosol fire suppression composition comprising:

an oxidizer represented by the formula M(XO_x)_y, wherein M is selected from a Group IA atom, a Group IIA atom, and a Group IIIA atom, X is selected from the group consisting of Cl, Br and I, x is 1-4, and y is 1-3; and

a fuel component comprising melamine cyanurate, a Group IA or Group IIA salt of an organic acid, or a mixture thereof; and

wherein the oxidizer is present in a greater amount by weight percent than the fuel component, and wherein the composition has a heat of combustion of between about 250 calories per gram and 600 calories per gram;

wherein the combustion products consist essentially of about 8 percent to about 12 percent H₂O, about 15 percent to about 25 percent CO₂, about 1 percent to about 10 percent nitrogen, about 40 percent to about 55 percent potassium bromide, and about 18 percent to about 25 percent potassium carbonate by total weight of the combustion products.

2. The composition of claim 1, wherein M is selected from the group consisting of lithium, potassium, sodium, strontium, magnesium, and aluminum.

3. The composition of claim 1, wherein XO_x is selected from the group consisting of a chlorate, a bromate, an iodate, a perchlorate, and a chlorite.

4. The composition of claim 3, wherein XO_x is a bromate.

5. The composition of claim 1, wherein M(XO_x)_y is selected from the group consisting of sodium bromate, potassium bromate, and mixtures thereof.

6. The composition of claim 1, wherein the heat of combustion of the pyrotechnic aerosol fire suppression composition is between about 300 calories per gram to about 500 calories per gram.

7. A pyrotechnic aerosol fire suppression composition comprising:

an oxidizer represented by the formula M(XO_x)_y, wherein M is selected from a Group IA atom, a Group IIA atom, and a Group IIIA atom, X is selected from the group consisting of Cl, Br and I, x is 1-4, and y is 1-3; and

a fuel component comprising melamine cyanurate, a Group IA or Group IIA salt of an organic acid, or a mixture thereof, and

wherein the oxidizer is present in a greater amount by weight percent than the fuel component, and

wherein the combustion products consist essentially of about 9 percent to about 11 percent H₂O, about 18 percent to about 22 percent CO₂, about 2 percent to about 12 percent nitrogen, about 45 percent to about 50 percent potassium bromide, and about 18 percent to about 22 percent potassium carbonate by total weight of the combustion products.

8. The composition of claim 7, wherein the oxidizer is selected from the group consisting of sodium bromate, potassium bromate, and mixtures thereof, and the fuel component is selected from the group consisting of melamine cyanurate, potassium cyanurate, potassium isocyanurate, potassium hydroxyacetate, magnesium cyanurate, magnesium isocyanurate, magnesium hydroxyacetate, and mixtures thereof.

9. The composition of claim 7, wherein the composition has a heat of combustion between about 250 calories per gram and 600 calories per gram.

10. The composition of claim 9, wherein the heat of combustion is between about 300 calories per gram to about 500 calories per gram.

11. The composition of claim 10, wherein the heat of combustion is about 400 calories per gram to about 450 calories per gram.

12. The composition of claim 7, wherein the oxidizer is present in an amount of about 70 percent or less by weight of the total composition.

13. The composition of claim 12, wherein the oxidizer is present in an amount of about 60 percent or less by weight of the total composition.

14. The composition of claim 7, wherein the fuel component is selected from the group consisting of melamine cyanurate, potassium cyanurate, potassium isocyanurate, potassium hydroxyacetate, magnesium cyanurate, magnesium isocyanurate, magnesium hydroxyacetate, and mixtures thereof.

15. A pyrotechnic aerosol fire suppression composition consisting essentially of:

an oxidizer; and

a fuel component comprising at least one organic salt, wherein the oxidizer is present in a greater amount by weight percent than the fuel component,

wherein the combustion products consist essentially of about 5 percent to about 15 percent H₂O, about 10 percent to about 30 percent CO₂, about 0.5 percent to about 15 percent nitrogen, about 40 percent to about 90 percent potassium bromide, and about 10 percent to about 30 percent potassium carbonate by total weight of the combustion products.

16. The composition of claim 15, wherein the oxidizer is selected from the group consisting of sodium bromate, potassium bromate, and mixtures thereof.

17. The composition of claim 16, wherein the fuel component is selected from the group consisting of melamine cyanurate, potassium cyanurate, potassium isocyanurate, potassium hydroxyacetate, magnesium cyanurate, magnesium isocyanurate, magnesium hydroxyacetate, and mixtures thereof.

18. The composition of claim 15, wherein the composition has a heat of combustion of between about 250 calories per gram and 600 calories per gram.