Bismuth oxide primer composition
View Patent ↗A priming mixture is provided having a primary explosive and an oxidizer system containing bismuth oxide. The priming mixture generally is applicable to any application or device that employs ignition of a propellant or fuel, including, but not limited to, air bag gas generator systems, signaling devices, ejection seats, small or large arms ammunition primers, and the like.
1. A device that is activated by ignition of a propellant or fuel, comprising:
a priming mixture comprising a primary explosive and a substantially non-hygroscopic oxidizer system, wherein the oxidizing system comprises bismuth oxide, wherein the primary mixture comprises a gas producing agent of about 5% to 25% by weight;
wherein the oxidizer system has a texture sufficient to enable the oxidizer system to flow when blended with the primary explosive such that the priming mixture is substantially homogeneous; and
a propellant or fuel adapted to be initiated by, and in contact with, the priming mixture.
2. The device of claim 1 , wherein the device is selected from a seat belt tensioner, an air bag, a signal flare, a hand grenade, a mechanical launch grenade, a smoke grenade, a restraint system, an ejection seat, an explosive canopy, a drogue chute extractor, an aerial decoy, a powered hand tool, an industrial tool, a fastening device, a grenade launcher, a gas grenade, a stun grenade, a sub-munition, a projectile launcher, a pyrotechnic initiation delay device, an impulse motor, a delay detonator, a blasting cap, a rock crusher, a cable cutting device, a seismic explosive device, an explosive projectile, a shaped charge, a wellbore perforating apparatus, an anti-armor warhead, a muzzle-loading firearm, a burrowing animal exterminating device, a predator control device, an igniter for starting fires, or an ignition system for chemical heaters.
3. The device of claim 1 , wherein the wherein the primary explosive comprises a compound selected from metal salts of trinitroresorcinol, metal salts of dinitrobenzofuroxan, potassium dinitrobenzofuroxane (KDNBF), diazodinitrophenol (DDNP), mercury fulminate, lead azide, lead styphnate, silver azide, tetrazene, metal salts of 5-nitrotetrazole, or any combination thereof.
4. The device of claim 1 , wherein the oxidizer system further comprises a secondary oxidizer selected from zinc peroxide, manganese dioxide, molybdenum trioxide, strontium nitrate, strontium peroxide, tin oxide, iron oxide, potassium nitrate, barium nitrate, or any combination thereof.
5. The device of claim 1 , wherein the gas producing agent is selected from pentaerythritol tetranitrate, trinitrotoluene, or a combination thereof.
6. The device of claim 1 , wherein the priming mixture further comprises a reducing agent.
7. The device of claim 6 , wherein the reducing agent is selected from aluminum, boron, calcium silicide, magnesium, magnesium-aluminum alloy, silicon, titanium, tungsten, zirconium, nitrocellulose, or any combination thereof.
8. The device of claim 1 , wherein the priming mixture further comprises a sensitizer.
9. The device of claim 8 , wherein the sensitizer is selected from tetrazene, ground glass, or a combination thereof.
10. The device of claim 1 , wherein the priming mixture further comprises a conducting component.
11. The device of claim 10 , wherein the conducting component is selected from aluminum, carbon black, titanium, zirconium, silver, gold, uranium, lead azide, silver azide, or any combinations thereof.
12. A device that is activated by ignition of a propellant or fuel, comprising:
a) a substantially homogeneous, non-corrosive priming mixture, wherein the priming mixture comprises:
from about 20% to about 70% by weight of a primary explosive;
from about 10% to 25% by weight of a substantially non-hygroscopic oxidizer system comprising bismuth oxide;
from about 5% to 25% by weight of a gas producing agent;
from about 0% to about 20% by weight of a sensitizer;
from about 0% to about 20% by weight of a reducing agent; and
from about 0% to about 20% by weight of a conductive component; and
b) a propellant or fuel adapted to be initiated by, and in contact with, the priming mixture.
13. The device of claim 12 , wherein the device is selected from a seat belt tensioner, an air bag, a signal flare, a hand grenade, a mechanical launch grenade, a smoke grenade, a restraint system, an ejection seat, an explosive canopy, a drogue chute extractor, an aerial decoy, a powered hand tool, an industrial tool, a fastening device, a grenade launcher, a gas grenade, a stun grenade, a sub-munition, a projectile launcher, a pyrotechnic initiation delay device, an impulse motor, a delay detonator, a blasting cap, a rock crusher, a cable cutting device, a seismic explosive device, an explosive projectile, a shaped charge, a wellbore perforating apparatus, an anti-armor warhead, a muzzle-loading firearm, a burrowing animal exterminating device, a predator control device, an igniter for starting fires, or an ignition system for chemical heaters.
14. The device of claim 12 , wherein the priming mixture comprises from about 25% to about 50% by weight of the primary explosive.
15. The device of claim 12 , wherein the priming mixture comprises from about 5% to about 20% by weight of the sensitizer.
16. The device of claim 12 , wherein the priming mixture comprises from about 5% to about 20% by weight of the reducing agent.
17. The device of claim 12 , wherein the priming mixture comprises from about 0.1% to about 10% by weight of a conductive component.