Gas generant

• US 20080271825A1
• Filed: 07/07/2008
• Published: 11/06/2008
• Est. Priority Date: 09/29/2006
• Status: Abandoned Application

• Current Assignee: Jeffrey W. Halpin, Sean P. Burns
• Original Assignee: Jeffrey W. Halpin, Sean P. Burns
• Inventors: Burns, Sean P., Halpin, Jeffrey W.
• Application Number:
  US12/217,577
• Publication Number:
  US 20080271825A1
• Time in Patent Office: Days
• US Class Current: 149/45
• CPC Class Codes: C06B 23/006 Stabilisers (e.g. thermal stabilisers) processes C06B21/0091; foam stabilisers C06B23/002
• CPC Class Codes: C06D 5/06 by reaction of two or more solids

Abstract

Gas generant compositions contain the mono-ammonium salt of bis (1(2)H-tetrazol-5-yl)-amine, an oxidizer such as phase stabilized ammonium nitrate, and a first additive selected from fumed oxides such as fumed silica. Gas generators 10 and gas generating systems 200 incorporating the compositions are also contemplated.

Claims

1. A gas generant composition comprising:

a first oxidizer selected from metal and nonmetal nitrates;

metal nitrites, metal and nonmetal perchlorates, metal oxides, basic metal nitrates, said first oxidizer provided at about 0.1 to 80% by weight of the gas generant composition;

a first fuel consisting of mono-ammonium salt of bis-(1(2) H-tetrazol-5-yl)amine, said first fuel provided at about 0.1 to 50% by weight of the gas generant composition; and

a first additive selected from fumed metal oxides and mixtures thereof, said first additive provided in amounts no greater than 10% by weight of the gas generant composition.

2. The gas generant composition of claim 1 further comprising:

a second fuel selected from derivatives of bis-(1(2) H-tetrazol-5-yl)-amine including its anhydrous acid, its acid monohydrate, metal salts, and complexes thereof;

azoles, metal salts of azoles, nonmetal and metal salts of nitramine derivatives of azoles;

guanidines;

salts of guanidines;

nitro derivatives of guanidines;

azoamides;

nitrate salts of azoamides, and mixtures thereof;

said second fuel provided at about 0.1-49.9% by weight of the gas generant composition.

3. The gas generant composition of claim 1 further comprising:

a second additive selected from silicon, silicon dioxide, fused silicon, silicones;

silicates;

natural minerals including clay, mica, and talc;

lubricants including graphite, magnesium stearate, boron nitride, molybdenum sulfide; and

mixtures thereof, said second additive provided at about 0.1 to 10% by weight of the gas generant composition.

4. The gas generant composition of claim 1 further comprising a secondary oxidizer.

5. The gas generant composition of claim 1 further comprising a binder selected from cellulose derivatives, polyalkenes carbonates, and mixtures thereof, said binder provides at about 0.1 to 10% by weight of the gas generant composition.

6. A gas generator containing the composition of claim 1.

7. A vehicle occupant protection system containing the composition of claim 1.

8. The gas generant composition of claim 1 comprising the mono-ammonium salt of bis (1(2) H-tetrazol-5-yl)-amine at about 0.1 to 50% by weight of the gas generant composition, phase stabilized ammonium nitrate at about 0.1 to 80% by weight of the gas generant composition, and fumed silica at about 0.1 to 10% by weight of the gas generant composition.

9. The gas generant composition of claim 1 wherein said first oxidizer is selected from ammonium nitrate, phase stabilized ammonium nitrate, potassium nitrate, strontium nitrate, potassium nitrite, potassium chlorate, potassium perchlorate, ammonium perchlorate, iron oxide, copper oxide, basic copper nitrate, basic iron nitrate, and mixtures thereof.

10. The gas generant composition of claim 2 wherein said second fuel is selected from a potassium, sodium, strontium, copper, boron and zinc salt of bis-(1(2)H-tetrazol-5-yl)-amine;

5-aminotetrazole;

potassium 5-aminotetrazole;

mono-ammonium salt of 5,5-bis-1H-tetrazole and di-ammonium salt of 5,5-bis-1H-tetrazole;

5-aminotetrazole nitrate;

nitraminotetrazole;

di-potassium 5-nitraminotetrazole;

mono-ammonium nitraminotetrazole and di-ammonium nitraminotetrazole;

dicyandiamide;

guanidine nitrate;

nitroguanidine;

azodicarbonamide, azodicarbonamidine di-nitrate; and

mixtures thereof.

11. The gas generant composition of claim 1 wherein said fumed metal oxide is selected from at least one of fumed silica, fumed alumina, and mixtures thereof.

12. The gas generant composition of claim 1 wherein said fumed metal oxide is fumed silica provided at about 0.75% by weight of the gas generant composition.

13. A gas generant composition comprising:

a first oxidizer selected from metal and nonmetal nitrates;

metal nitrites, metal and nonmetal perchlorates, metal oxides, basic metal nitrates, said first oxidizer provided at about 0.1 to 80% by weight of the gas generant composition;

a first fuel consisting of mono-ammonium salt of bis-(1(2)H-tetrazol-5-yl)amine, said first fuel provided at about 0.1 to 50% by weight of the gas generant composition; and

a first additive selected from the group consisting of fumed silica, fumed alumina, and mixtures thereof, said first additive provided at about 0.05 to 10% by weight of the gas generant composition.

14. The gas generant composition of claim 13 wherein said first additive is provided at about 0.05 to 5% by weight of the gas generant composition.

15. The gas generant composition of claim 13 wherein said first additive is provided at about 0.05 to 0.75% by weight of the gas generant composition.

16. A gas generant composition comprising:

a first oxidizer selected from metal and nonmetal nitrates;

metal nitrites, metal and nonmetal perchlorates, metal oxides, basic metal nitrates, said first oxidizer provided at about 0.1 to 80% by weight of the gas generant composition;

a first fuel consisting of mono-ammonium salt of bis-(1(2)H-tetrazol-5-yl)amine, said first fuel provided at about 0.1 to 50% by weight of the gas generant composition; and

fumed silica provided in amounts no greater than 10% by weight of the gas generant composition.

17. The gas generant composition of claim 16 wherein said fumed silica is provided at about 0.05 to 0.75% by weight of the gas generant composition.

18. The gas generant composition of claim 16 wherein said fumed silica is provided at about 0.25 to 0.75% by weight of the gas generant composition.

19. The gas generant composition of claim 16 wherein said fumed silica is provided at about 0.75% by weight of the gas generant composition.

20. A vehicle occupant protection system containing the composition of claim 16.