Booster composition
View Patent ↗An improved ignition and/or booster composition contains a boron-containing constituent such as boron carbide or a metal boride, and, an oxidizer such as potassium perchlorate. A gas generator and a vehicle occupant protection system containing the composition are also included.
1. A composition comprising:
a boron-containing compound selected from the group consisting of boron carbide, a metal boride, or a mixture thereof;
an oxidizer selected from the group consisting of at least one metal nitrate, metal nitrite, metal perchlorate, metal chlorate, metal oxide, and mixtures thereof; and
a secondary fuel, wherein said secondary fuel is selected from the group consisting of tetrazoles, triazoles, carboxylic acids, hydrazides, triazines, urea derivatives, guanidines, salts thereof or mixtures thereof; wherein the composition is free of ammonium nitrate and ammonium perchlorate.
2. The composition of claim 1 , wherein the boron-containing compound is provided at 5-30 weight percent of the total composition.
3. The composition of claim 1 wherein the boron-containing compound selected from the group consisting of a metal boride comprising titanium boride, tungsten boride, magnesium boride, nickel boride, or a mixture thereof.
4. The composition of claim 1 , wherein the boron-containing compound comprises boron carbide.
5. The composition of claim 1 , wherein the oxidizer is provided at 40-95 weight percent of the total composition.
6. The composition of claim 1 , wherein the oxidizer comprises potassium nitrate.
7. The composition of claim 1 , wherein the secondary fuel is provided at 0.1-30 weight percent of the total composition.
8. The composition of claim 1 wherein said secondary fuel is selected from the group consisting of mono-ammonium bis-tetrazole amine, 5-aminotetrazole, guanidine nitrate, d,1-tartaric acid, nitroguanidine, 5,5′-bis-1H-tetrazole, di-ammonium salt of 5′5-bis-1H-tetrazole, ammonium dinitrosalicylic acid, and mixtures thereof.
9. A gas generator comprising the composition of claim 1 .
10. A vehicle occupant protection system comprising the composition of claim 1 .
11. The composition of claim 1 , wherein the boron-containing compound is provided at 10-30 weight percent of the total composition.
12. The composition of claim 11 , wherein the boron-containing compound is boron carbide.
13. The composition of claim 11 , wherein the oxidizer is provided at 70-90 weight percent of the total composition.
14. The composition of claim 11 , wherein said oxidizer is selected from the group consisting of potassium perchlorate, potassium nitrate, and mixtures thereof.
15. A gas generator containing the composition of claim 11 .
16. A vehicle occupant protection system containing the composition of claim 11 .