초록 ▼

A frangible projectile with a specific gravity similar to a lead projectile. The projectile comprises 34-94%, by weight, binder. The binder comprises poly ether block amide resin. The projectile further comprises 6-66%, by weight, ballast. The ballast comprises at least one member selected from a gr

A frangible projectile with a specific gravity similar to a lead projectile. The projectile comprises 34-94%, by weight, binder. The binder comprises poly ether block amide resin. The projectile further comprises 6-66%, by weight, ballast. The ballast comprises at least one member selected from a group consisting of tungsten, tungsten carbide, molybdenum, tantalum, ferro-tungsten, copper, bismuth, iron, steel, brass, aluminum bronze, beryllium copper, tin, aluminum, titanium, zinc, nickel silver alloy, cupronickel and nickel. The projectile can be prepared with a particularly preferred specific gravity of 5-14 and more preferably 11-11.5.

대표청구항 ▼

Claimed is: 1. A projectile comprising a ballast encased in a binder wherein said binder comprises a resin comprising linear chains of rigid polyamide segments interspaced with flexible poly ether segments and said projectile has a minimum specific gravity of 5. 2. The projectile of claim 1 compr

Claimed is: 1. A projectile comprising a ballast encased in a binder wherein said binder comprises a resin comprising linear chains of rigid polyamide segments interspaced with flexible poly ether segments and said projectile has a minimum specific gravity of 5. 2. The projectile of claim 1 comprising about 6 to about 66%, by weight, said ballast and about 34-94%, by weight, said binder. 3. The projectile of claim 2 comprising 45-49%, by weight, said ballast and 51-55%, by weight, said binder. 4. The projectile of claim 1 wherein said binder further comprises a second resin. 5. The projectile of claim 4 wherein said binder comprises about 10 to about 30%, by weight, said a resin comprising linear chains of rigid polyamide segments interspaced with flexible poly ether segments and about 70 to about 90%, by weight, said second resin. 6. The projectile of claim 4 wherein said second resin is selected from a group consisting of nylon and polybutylene terephthalate. 7. The projectile of claim 4 wherein said ballast comprises at least one member selected from a group consisting of tungsten, tungsten carbide, molybdenum, tantalum, ferro-tungsten, copper, bismuth, iron, steel, brass, aluminum bronze, beryllium copper, tin, aluminum, titanium, zinc, nickel silver alloy, cupronickel and nickel. 8. The projectile of claim 7 wherein said ballast comprises at least one member selected from a group consisting of tungsten, tungsten carbide, tantalum, molybdenum and ferro-tungsten. 9. The projectile of claim 1 wherein said projectile has a minimum specific gravity of 10. 10. The projectile of claim 1 wherein said binder further comprises a fiber. 11. The projectile of claim 1 wherein said binder further comprises a lubricant. 12. The frangible projectile of claim 1 further comprising a plasticizer. 13. The frangible projectile of claim 12 wherein said plasticizer is a sulfonamide. 14. The frangible projectile of claim 13 wherein said plasticizer is an aromatic sulfonamide. 15. The frangible projectile of claim 14 wherein said plasticizer is n-butylbenzene sulfonamide. 16. A projectile comprising a ballast encased in a binder wherein said binder comprises a resin comprising linear chains of rigid polyamide segments interspaced with flexible poly ether segments and said projectile has a minimum specific gravity of 5 wherein said ballast consist essentially of tungsten. 17. A frangible projectile comprising: 34-94%, by weight, binder wherein said binder comprises a resin comprising linear chains of rigid polyamide segments interspaced with flexible poly ether segments; and 6-66%, by weight, ballast wherein said ballast comprises at least one member selected from a group consisting of tungsten, tungsten carbide, molybdenum, tantalum, ferro-tungsten, copper, bismuth, iron, steel, brass, aluminum bronze, beryllium copper, tin, aluminum, titanium, zinc, nickel silver alloy, cupronickel and nickel; and wherein said projectile has a specific gravity of about 5 to about 14. 18. The frangible projectile of claim 17 wherein said projectile has a specific gravity of at least about 10. 19. The frangible projectile of claim 18 wherein said projectile has a specific gravity of about 11 to about 11.5. 20. The frangible projectile of claim 17 further comprising a second resin. 21. The frangible projectile of claim 20 wherein said second resin is selected from a group consisting of nylon and polybutylene terephthalate. 22. The frangible projectile of claim 20 wherein said second resin is nylon selected from a group consisting of nylon 6, nylon 6/6, nylon 11 and nylon 12. 23. The frangible projectile of claim 17 wherein said binder further comprises a fiber. 24. The frangible projectile of claim 23 wherein said fiber is an aramid. 25. The frangible projectile of claim 17 wherein said binder further comprises a lubricant. 26. The frangible projectile of claim 25 wherein said lubricant is at least one material chosen from a group consisting of molybdenum disulfide, silicone, polytetrafluoethylene and mineral oil. 27. A projectile comprising a ballast encased in a binder wherein said binder comprises a resin comprising linear chains of rigid polyamide segments interspaced with flexible poly ether segments and said projectile has a minimum specific gravity of 5 wherein said ballast consist of tungsten carbide, molybdenum, tantalum, ferro-tungsten, copper, bismuth, iron, steel, brass, aluminum bronze, beryllium copper, tin, aluminum, titanium, zinc, nickel silver alloy, cupronickel and nickel.