Non-toxic percussion primers and methods of preparing the same

• US 8,192,568 B2
• Filed: 02/11/2008
• Issued: 06/05/2012
• Est. Priority Date: 02/09/2007
• Status: Active Grant

• Current Assignee: Federal Cartridge Company (Vista Outdoor Inc.)
• Original Assignee: Alliant Techsystems Incorporated (Northrop Grumman Corporation)
• Inventors: Erickson, Jack, Sandstrom, Joel Lee, Johnston, Gene, Norris, Neal, Braun, Patrick, Blau, Reed, Liu, Lisa Spendlove, Newell, Rachel Hendrika
• Primary Examiner(s): MCDONOUGH, JAMES E
• Application Number:
  US12/029,084
• Publication Number:
  US 20080245252A1
• Time in Patent Office: 1,576 Days
• Field of Search: 149/37, 149/88, 149/108.2, 149/108.6, 149/109.2, 149/109.4
• US Class Current: 149/37
• CPC Class Codes: C06B 23/006 Stabilisers (e.g. thermal stabilisers) processes C06B21/0091; foam stabilisers C06B23/002
• CPC Class Codes: C06B 33/00 Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
• CPC Class Codes: C06C 7/00 Non-electric detonators; Blasting caps; Primers
• CPC Class Codes: F42C 19/10 Percussion caps

Abstract

A percussion primer composition including at least one explosive, at least fuel particle having a particle size of about 1500 nm or less, at least one oxidizer, optionally at least one sensitizer, optionally at least one buffer, and to methods of preparing the same.

Claims

1. A primer composition comprising:

at least one explosive;

at least one fuel particle;

at least one oxidizer; and

a combination of at least one organic acid or salt thereof and at least one inorganic acid or salt thereof;

wherein said oxidizer is bismuth trioxide having an average particle size of about 10 microns to about 200 microns.

2. The primer composition of claim 1 wherein said at least one inorganic acid or salt thereof is phosphoric acid or phosphate.

3. The primer composition of claim 1 wherein said at least one organic acid or salt thereof is citric acid or citrate.

4. The primer composition of claim 1 wherein said at least one organic acid is citric acid and at least one inorganic acid is phosphoric acid.

5. The primer composition of claim 1 wherein said at least one explosive is nitrocellulose.

6. The primer composition of claim 1 wherein said at least one explosive is chosen from nitrocellulose, RDX, HMX, CL-20, nitroguanidine, TNT, PETN, styphnic acid and mixtures thereof.

7. The primer composition of claim 1 wherein said at least one fuel particle is chosen from aluminum, boron, molybdenum, silicon, titanium, tungsten, magnesium, melamine, zirconium, calcium silicide, and mixtures thereof.

8. The primer composition of claim 7 wherein said at least one fuel particle is aluminum.

9. The primer composition of claim 8 wherein said aluminum has a particle size from about 100 nm to about 1500 nm.

10. The primer composition of claim 8 wherein said aluminum has a particle size from about 100 nm to about 1000 nm.

11. The primer composition of claim 8 wherein said aluminum has a particle size from about 100 nm to about 650 nm.

12. The primer composition of claim 8 wherein said aluminum has a particle size from about 100 nm to about 200 nm.

13. The primer composition of claim 8 wherein said aluminum has a particle size from about 250 nm to about 350 nm.

14. The primer composition of claim 7 wherein said fuel particle has a particle size from about 100 nm to about 1500 nm.

15. The primer composition of claim 7 wherein said fuel particle has a particle size from about 100 nm to about 1000 nm.

16. The primer composition of claim 7 wherein said fuel particle has a particle size from about 100 nm to about 650 nm.

17. The primer composition of claim 8 wherein said fuel particle has a particle size from about 100 nm to about 200 nm.

18. The primer composition of claim 8 wherein said fuel particle has a particle size from about 250 nm to about 350 nm.

19. The primer composition of claim 1 wherein said at least one organic acid or salt thereof is citric acid or citrate and said at least one inorganic acid or salt thereof is phosphoric acid or phosphate.

20. The primer composition of claim 1 further comprising tetracene.

21. The primer composition of claim 20 wherein said tetracene is in an amount of 0 wt-% to about 10 wt-% of said primer composition.

22. The primer composition of claim 1 wherein said bismuth trioxide is in an amount of about 20 wt-% to about 70 wt-% of said primer composition.

23. The primer composition of claim 1 wherein said bismuth trioxide is in an amount of about 40 wt-% to about 60 wt-% of said primer composition.

24. The primer composition of claim 1 wherein said at least one explosive is in an amount of about 5 wt-% to about 40 wt-% of said primer composition.

25. The primer composition of claim 1 wherein said at least one fuel particle is in an amount of about 1 wt-% to about 20 wt-% of said primer composition.

26. The primer composition of claim 1 wherein said at least one fuel particle is in an amount of about 1 wt-% to about 15 wt-% of said primer composition.

27. The primer composition of claim 1 wherein said at least one fuel particle is in an amount of about 4 wt-% to about 12 wt-% of said primer composition.

28. The primer composition of claim 1 wherein said combination of at least one organic acid or salt thereof and at least one inorganic acid or salt thereof is in an amount of about 0.1 wt-% to about 0.5 wt-% of said primer composition.

29. The primer composition of claim 1 wherein said at least one explosive is in an amount of about 5 wt-% to about 40 wt-% of said primer composition, wherein said at least one fuel particle is in an amount of about 1 wt-% to about 20 wt-% of said primer composition, wherein said bismuth trioxide is in an amount of about 40 wt-% to about 60 wt-% of said primer composition, and wherein said combination of at least one organic acid or salt thereof and at least one inorganic acid or salt thereof is in an amount of about 0.1 wt-% to about 0.5 wt-% of said primer composition.

30. The primer composition of claim 29 wherein said at least one explosive is nitrocellolose, wherein said at least one fuel particle is aluminum, and wherein said at least one organic acid or salt thereof is citric acid or citrate and said at least one inorganic acid or salt thereof is phosphoric acid or phosphate.

31. The primer composition of claim 30 wherein said aluminum has a particle size from about 100 nm to about 1500 nm.

32. The primer composition of claim 30 wherein said aluminum has a particle size from about 100 nm to about 1000 nm.

33. The primer composition of claim 30 wherein said aluminum has a particle size from about 100 nm to about 650 nm.

34. The primer composition of claim 30 wherein said aluminum has a particle size from about 100 nm to about 200 nm.

35. The primer composition of claim 30 wherein said aluminum has a particle size from about 250 nm to about 350 nm.