Explosive and propellant composition and method

• US 4,997,496 A
• Filed: 06/13/1989
• Issued: 03/05/1991
• Est. Priority Date: 06/13/1989
• Status: Expired due to Fees

• Current Assignee: Roche Vitamins, Inc. (Roche Holding AG)
• Original Assignee: Hoffmann-La Roche Incorporated (Roche Holding AG)
• Inventors: Wehrli, Pius A.
• Primary Examiner(s): Lechert, Jr., Stephen J.
• Application Number:
  US07/365,346
• Time in Patent Office: 630 Days
• Field of Search: 149/18, 149/19.7, 149/19.92, 149/61, 149/110, 149/112, 149/21, 149/109.6
• US Class Current: 149/18
• CPC Class Codes: C06B 31/02 the salt being an alkali metal or an alkaline earth metal nitrate
• CPC Class Codes: C06B 31/28 the salt being ammonium nitrate
• CPC Class Codes: Y10S 149/11 Particle size of a component
• CPC Class Codes: Y10S 149/112 Inorganic nitrogen-oxygen salt

Abstract

An explosive and propellant composition is obtained by admixing finely divided particles of ascorbic acid and a nitrate-containing oxidation agent, such as potassium nitrate. Admixing can be carried out in the dry state, at room temperature. The composition upon ignition gives off no sulfurous fumes, and leaves little or no carbon residue; and causes no corrosion with contacted metal surfaces.

Claims

1. An explosive and propellant composition which comprises an admixture of ascorbic acid having a particle size of about 10 microns or less and a nitrate-containing oxidation agent having a particle size of about 10 microns or less.

2. A composition according to claim 1, in which the weight ratio of ascorbic acid to nitrate-containing oxidation agent is between 10:

90 and 50;

50.

3. A composition according to claim 2, in which the weight ratio of ascorbic acid to nitrate-containing oxidation agent is between 20:

80 and 45;

55.

4. A composition according to claim 1, in which the nitrate-containing oxidation agent is an inorganic nitrate.

5. A composition according to claim 4, in which the inorganic nitrate-containing oxidation agent is an alkali or alkaline earth metal nitrate.

6. A composition according to claim 5, in which the alkali metal nitrate oxidation agent is potassium nitrate.

7. A composition according to claim 1, which further comprises an additive selected from the group consisting of binder materials, coloring agents, gelatinizing agents, illuminating agents, and explosive enhancing agents.

8. A composition according to claim 7, wherein said binder material is present in an account sufficient to enable the composition to substain its shape when compressed.

9. A composition according to claim 8, in which the binder material is starch.

10. A method of making an explosive and propellant composition of ascorbic acid having a particle size of about 10 microns or less and a nitrate-containing oxidation agent having a particle size of about 10 microns or less, comprising forming a homogeneous admixture of the two ingredients in particulate form.

11. A method according to claim 10, in which the ascorbic acid and nitrate-containing oxidation agent are employed in a weight ratio between 10:

90 and 50;

50.

12. A method according to claim 11 in which the ascorbic acid and nitrate-containing oxidation agent are employed in a weight ratio between 20:

80 and 45;

55.

13. A method according to claim 10, in which the nitrate-containing oxidation agent is an inorganic nitrate.

14. A method according to claim 10, in which the inorganic nitrate-containing oxidation agent is an alkali or alkaline earth metal nitrate.

15. A method according to claim 14, in which the alkali metal nitrate oxidation agent is potassium nitrate.

16. A method according to claim 10, which further comprises an additive selected from the group consisting of binder material, coloring agents, gelatenizing agents, illuminating agents, and explosive enhancing agents.

17. A method according to claim 16, wherein said binder material is present in an amount sufficient to enable the composition to substain its shape when compressed.

18. A method according to claim 10, in which the binder material is corn starch.

19. A method according to claim 10, in which the ascorbic acid and nitrate-containing oxidation agent comprise particles of about 10 microns or less.

20. A method according to claim 10 in which the ingredients are dry blended at room temperature.

21. A method according to claim 10 in which the ingredients are blended in an aqueous or organic liquid medium.

22. A consumable cartridge comprising:

(a) priming means;

(b) projectile means; and

(c) molded cartridge case containing said projectile for use in a firearm, the molded cartridge case containing an explosive and propellant composition of ascorbic acid having a particle size of about 10 microns or less and a nitrate-containing oxidation agent having a particle size of about 10 microns or less.

23. A consumable cartridge according to claim 22, in which the nitrate-containing oxidation agent is an alkali metal nitrate.

24. A consumable cartridge according to claim 23, in which the alkali metal nitrate is potassium nitrate.