Non-toxic percussion primers and methods of preparing the same

• US 8,454,769 B2
• Filed: 04/26/2012
• Issued: 06/04/2013
• 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, Johnston, Gene, Norris, Neal, Braun, Patrick, Blau, Reed, Liu, Lisa Spendlove, Newell, Rachel Hendrika, Sandstrom, Joel L.
• Primary Examiner(s): MCDONOUGH, JAMES E
• Application Number:
  US13/456,920
• Publication Number:
  US 20120227874A1
• Time in Patent Office: 404 Days
• Field of Search: 149/37, 149/38, 149/108.6, 149/109.2, 149/109.4
• US Class Current: 149/108.6
• 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:

an explosive consisting essentially of a nitrate ester chosen from pentaerythritol tetranitrate (“

PETN”

), nitrocellulose, and mixtures thereof and optionally a sensitizer;

a plurality of fuel particles having an average particle size of about 100 nm to about 1500 nm; and

an oxidizer;

wherein the primer composition is essentially devoid of other explosives except for the optional sensitizer and/or a propellant.

2. The primer composition of claim 1, wherein said nitrate ester in an amount of about 5 wt-% to about 40 wt-% of the primer composition.

3. The primer composition of claim 1, wherein said nitrate ester comprises nitrocellulose.

4. The primer composition of claim 3, wherein said nitrocellulose in an amount of about 5 wt-% to about 40 wt-% of the primer composition.

5. The primer composition of claim 4, wherein said nitrocellulose in an amount of about 5 wt-% to about 20 wt-% of the primer composition.

6. The primer composition of claim 4, further comprising a sensitizer in an amount greater than 0 wt-% to about 20 wt-% of the primer composition.

7. The primer composition of claim 4, wherein said plurality of fuel particles are 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 oxidizer is chosen from bismuth trioxide, bismuth subnitrate, bismuth tetroxide, bismuth sulfide, zinc peroxide, tin oxide, manganese dioxide, molybdenum trioxide, potassium nitrate, and combinations thereof.

9. The primer composition of claim 8, wherein said plurality of fuel particles comprises aluminum and said oxidizer comprises bismuth trioxide.

10. The primer composition of claim 1, wherein said plurality of fuel particles are chosen from aluminum, boron, molybdenum, silicon, titanium, tungsten, magnesium, melamine, zirconium, calcium silicide, and mixtures thereof.

11. The primer composition of claim 10, wherein said oxidizer is chosen from bismuth trioxide, bismuth subnitrate, bismuth tetroxide, bismuth sulfide, zinc peroxide, tin oxide, manganese dioxide, molybdenum trioxide, potassium nitrate, and combinations thereof.

12. The primer composition of claim 1, wherein said oxidizer is chosen from bismuth trioxide, bismuth subnitrate, bismuth tetroxide, bismuth sulfide, zinc peroxide, tin oxide, manganese dioxide, molybdenum trioxide, potassium nitrate, and combinations thereof.

13. The primer composition of claim 1, further comprising at least one buffer.

14. The primer composition of claim 1, further comprising a friction generator.

15. The primer composition of claim 1, further comprising a single-base ground propellant.

16. The primer composition of claim 1, wherein the plurality of fuel particles have an average particle size of about 200 nm to about 1000 nm.

17. A primer composition comprising:

a primary explosive consisting essentially of nitrocellulose in an amount of about 5 wt-% to about 40 wt-% of the primer composition and optionally a sensitizer;

a plurality of fuel particles in an amount of about 1 wt-% to about 20 wt-% of the primer composition, said plurality of fuel particles having an average particle size of about 100 nm to about 1500 nm; and

an oxidizer in an amount of about 20 wt-% to about 70 wt-% of the primer composition;

wherein the primer composition is essentially devoid of other explosives except for the optional sensitizer and/or a propellant.

18. The primer composition of claim 17, further comprising a sensitizer in an amount greater than 0 wt-% to about 20 wt-% of the primer composition.

19. The primer composition of claim 18, wherein said sensitizer comprises tetracene.

20. The primer composition of claim 17, wherein said plurality of fuel particles are chosen from aluminum, boron, molybdenum, silicon, titanium, tungsten, magnesium, melamine, zirconium, calcium silicide, and mixtures thereof.

21. The primer composition of claim 20, wherein said oxidizer is chosen from bismuth trioxide, bismuth subnitrate, bismuth tetroxide, bismuth sulfide, zinc peroxide, tin oxide, manganese dioxide, molybdenum trioxide, potassium nitrate, and combinations thereof.

22. The primer composition of claim 21, wherein said plurality of fuel particles comprises aluminum and said oxidizer comprises bismuth trioxide.

23. The primer composition of claim 17, wherein said oxidizer is chosen from bismuth trioxide, bismuth subnitrate, bismuth tetroxide, bismuth sulfide, zinc peroxide, tin oxide, manganese dioxide, molybdenum trioxide, potassium nitrate, and combinations thereof.

24. The primer composition of claim 17, further comprising at least one buffer.

25. The primer composition of claim 17, further comprising a single-base ground propellant.

26. The primer composition of claim 17, wherein the plurality of fuel particles have an average particle size of about 200 nm to about 1000 nm.

27. A primer composition comprising:

an explosive consisting essentially of at least one moderately insensitive explosive in an amount of about 5 wt-% to about 40 wt-% of the primer composition and optionally a sensitizer, the at least one moderately insensitive explosive chosen from nitrocellulose, pentaerythritol tetranitrate (“

PETN”

), 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazatetracyclo[5.5.0.0.^5,90^3,11]-dodecane (“

CL-20”

), cyclo-1,3,5-trimethylene-2,4,6-trinitramine (“

RDX”

), cyclotetramethylene tetranitramine (“

HMX”

), 2,4,6-trinitrotoluene (“

TNT”

), nitroguanidine, styphnic acid, potassium dinitrobenzofuroxan (“

KDNBF”

), and mixtures thereof;

a plurality of fuel particles having an average particle size of about 100 nm to about 1500 nm; and

an oxidizer;

wherein the primer composition is essentially devoid of other explosives except for the optional sensitizer and/or a propellant.

28. The primer composition of claim 27, further comprising a sensitizer in an amount of greater than 0 wt-% to about 20 wt-% of the primer composition.

29. The primer composition of claim 28, wherein the sensitizer is tetracene.

30. The primer composition of claim 27, wherein the plurality of fuel particles are chosen from aluminum, boron, molybdenum, silicon, titanium, tungsten, magnesium, melamine, zirconium, calcium silicide, and mixtures thereof.

31. The primer composition of claim 30, wherein the plurality of fuel particles are present in an amount of about 1 wt-% to about 20 wt-% of the primer composition.

32. The primer composition of claim 31, wherein the plurality of fuel particles comprises aluminum.

33. The primer composition of claim 32, wherein said plurality of fuel particles have an average particle size of about 200 nm to about 1000 nm.

34. The primer composition of claim 27, wherein the oxidizer is chosen from bismuth trioxide, bismuth subnitrate, bismuth tetroxide, bismuth sulfide, zinc peroxide, tin oxide, manganese dioxide, molybdenum trioxide, potassium nitrate, and combinations thereof.

35. The primer composition of claim 34, wherein the oxidizer is present in an amount of about 20 wt-% to about 70 wt-% of the primer composition.

36. The primer composition of claim 27, further comprising at least one buffer.

37. The primer composition of claim 27, the at least one buffer chosen from at least one inorganic acid or salt thereof, at least one organic acid or salt thereof, and combinations thereof.

38. The primer composition of claim 27, further comprising a friction generator.

39. The primer composition of claim 38, wherein the friction generator comprises glass powder.

40. The primer composition of claim 27, further comprising a binder.

41. The primer composition of claim 27, further comprising a single-base ground propellant.

42. A primer composition comprising:

an explosive consisting essentially of at least one moderately insensitive explosive in an amount of about 5 wt-% to about 40 wt-% of the primer composition and optionally a sensitizer in an amount of about 0 wt-% to about 20 wt-% of the primer composition, the at least one moderately insensitive explosive chosen from nitrocellulose, pentaerythritol tetranitrate (“

PETN”

), 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazatetracyclo [5.5.0.0.^5,90^3,11]-dodecane (“

CL-20”

), cyclo-1,3,5-trimethylene-2,4,6-trinitramine (“

RDX”

), cyclotetramethylene tetranitramine (“

HMX”

), 2,4,6-trinitrotoluene (“

TNT”

), nitroguanidine, styphnic acid, potassium dinitrobenzofuroxan (“

KDNBF”

), and mixtures thereof;

a plurality of fuel particles having an average particle size of about 100 nm to about 1500 nm in an amount of about 1 wt-% to about 20 wt-% of the primer composition; and

an oxidizer in an amount of about 20 wt-% to about 70 wt-% of the primer composition;

wherein the primer composition is essentially devoid of other explosives except for the optional sensitizer and/or a propellant.

43. The primer composition of claim 42, further comprising a sensitizer, the sensitizer comprising tetracene in an amount greater than 0 wt-% and less than about 20 wt-% of the primer composition.

44. The primer composition of claim 42, wherein the plurality of fuel particles chosen from aluminum, boron, molybdenum, silicon, titanium, tungsten, magnesium, melamine, zirconium, calcium silicide, and mixtures thereof.

45. The primer composition of claim 44, wherein the oxidizer is chosen from bismuth trioxide, bismuth subnitrate, bismuth tetroxide, bismuth sulfide, zinc peroxide, tin oxide, manganese dioxide, molybdenum trioxide, potassium nitrate, and combinations thereof.

46. The primer composition of claim 45, further comprising aluminum fuel having a size between 80 and 120 mesh.

47. The primer composition of claim 45, further comprising at least one buffer chosen from at least one inorganic acid or salt thereof, at least one organic acid or salt thereof, and combinations thereof.

48. The primer composition of claim 45, further comprising a friction generator.

49. The primer composition of claim 44, further comprising a single-base ground propellant.

50. The primer composition of claim 44, wherein said plurality of fuel particles have an average particle size of about 200 nm to about 1000 nm.