Lead-free precussion primer mixes based on metastable interstitial composite (MIC) technology

• US 5,717,159 A
• Filed: 02/19/1997
• Issued: 02/10/1998
• Est. Priority Date: 02/19/1997
• Status: Expired due to Term

• Current Assignee: the united states of america as represented by the secretary of the navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Thompson, Don, Dixon, George P., Martin, Joe A.
• Primary Examiner(s): Nelson, Peter A.
• Application Number:
  US08/816,747
• Time in Patent Office: 356 Days
• Field of Search: 149/37, 149/40, 149/108.2, 102/204, 102/205
• US Class Current: 149/40
• CPC Class Codes: C06B 33/12 the material being two or more oxygen-yielding compounds
• CPC Class Codes: C06C 7/00 Non-electric detonators; Blasting caps; Primers

Abstract

A lead-free percussion primer composition and a percussion cup containing e composition. The lead-free percussion primer composition is comprised of a mixture of about 45 wt % aluminum powder having an outer coating of aluminum oxide and molybdenum trioxide powder or a mixture of about 50 wt % aluminum powder having an outer coating of aluminum oxide and polytetrafluoroethylene powder. The aluminum powder, molybdenum trioxide powder and polytetrafluoroethylene powder has a particle size of 0.1 μm or less, more preferably a particle size of from about 200-500 angstroms.

Claims

1. A lead-free percussion primer composition comprising:

a mixture of aluminum powder and molybdenum trioxide powder,

wherein said aluminum powder and said molybdenum trioxide have a particle size of about 0.1 μ

m or less, and said aluminum powder has an outer coating of aluminum oxide.

2. The lead-free percussion primer composition of claim 1, wherein said aluminum and molybdenum powder has a particle size of from about 200-500 angstroms.

3. The lead-free percussion primer composition of claim 1, wherein molybdenum trioxide is present in an amount sufficient to oxidize said aluminum powder.

4. The lead-free percussion primer composition of claim 1, further comprising powdered polytetrafluoroethylene.

7. The lead-free percussion primer composition of claim 1 wherein the aluminum powder constitutes about 45 wt %.

9. A percussion cup containing the composition of claim 1.

10. A percussion cup containing the composition of claim 4.

5. A lead-free percussion primer composition comprising particulate aluminum and polytetrafluoroethylene having a particle size of 0.1 μ

m or less, wherein said particulate aluminum has a coating thereon of aluminum oxide.

6. The lead-free percussion primer composition of claim 5, wherein the particle size is from about 200-500 angstroms.

8. The lead-free percussion primer composition of claim 5, wherein the aluminum powder constitutes about 50 wt %.

11. A percussion cup containing the composition of claim 5.