Liquid oxidizer composition perparation

• US 5,837,931 A
• Filed: 06/22/1992
• Issued: 11/17/1998
• Est. Priority Date: 12/20/1988
• Status: Expired due to Fees

• Current Assignee: Aerojet-General Corporation (L3Harris Technologies, Inc.)
• Original Assignee: Aerojet-General Corporation (L3Harris Technologies, Inc.)
• Inventors: Katzakian, Arthur Jr., Oberth, Adolf Eduard, Clark, George Merrill, Bruenner, Rolf Sylvester
• Primary Examiner(s): Miller, Edward A.
• Application Number:
  US07/902,370
• Time in Patent Office: 2,339 Days
• Field of Search: 149/36, 149/45, 149/46, 149/109.6
• US Class Current: 149/109.6
• CPC Class Codes: C06B 21/005 By a process involving melting at least part of the ingredients
• CPC Class Codes: C06B 21/0058 by casting a curable composition, e.g. of the plastisol type
• CPC Class Codes: C06B 31/00 Compositions containing an inorganic nitrogen-oxygen salt
• CPC Class Codes: C06B 31/28 the salt being ammonium nitrate
• CPC Class Codes: C06B 47/00 Compositions in which the components are separately stored until the moment of burning or explosion, e.g. "Sprengel"-type explosives; Suspensions of solid component in a normally non-explosive liquid phase, including a thickened aqueous phase
• CPC Class Codes: C06B 47/08 a component containing hydrazine or a hydrazine derivative

Abstract

Inorganic nitrate oxidizers are combined in novel eutectic compositions which place the oxidizers in liquid form at ambient temperatures. These liquid combinations are then used in the preparation of a wide variety of energetic formulations, notably solution and emulsion propellants.

Claims

1. A process for the preparation of an energetic formulation, said process comprising:

(a) combining oxidizers selected from the group consisting of ammonium nitrate, hydrazinium nitrate, hydroxylammonium nitrate and lithium nitrate to form a liquid oxidizer mixture selected from the group consisting of;

(i) ammonium nitrate and hydroxylammonium nitrate;

(ii) hydrazinium nitrate and hydroxylammonium nitrate;

(iii) ammonium nitrate, hydrazinium nitrate and hydroxylammonium nitrate; and

(iv) ammonium nitrate, hydrazinium nitrate and lithium nitrate;

the components of each said mixture being in relative amounts such that the lowest temperature at which each said mixture is entirely liquid is within the range of about 30°

C. or below;

(b) combining said liquid oxidizer mixture while in liquid form at a temperature within the range of about 30°

C. or below with a fuel and a binder curable at a temperature within the range of about 30°

C. or below, to form a curable liquid energetic composition; and

(c) casting and curing said curable liquid energetic composition at a temperature within the range of about 30°

C. or below.

2. A process in accordance with claim 1 in which said oxidizers are members selected from the group consisting of ammonium nitrate, hydrazinium nitrate, and hydroxylammonium nitrate, and said liquid oxidizer mixture is a member selected from the group consisting of

(i) ammonium nitrate and hydroxylammonium nitrate;

(ii) hydrazinium nitrate and hydroxylammonium nitrate; and

(iii) ammonium nitrate, hydrazinium nitrate and hydroxylammonium nitrate.

3. A process in accordance with claim 2 in which the relative amounts of the components of each said mixture are such that the lowest temperature at which each said mixture is entirely liquid is within the range of about 25°

C. or below.

4. A process in accordance with claim 2 in which the relative amounts of the components of each said mixture are such that the lowest temperature at which each said mixture is entirely liquid is within the range of about 20°

C. or below, and steps (b) and (c) are performed at room temperature.

5. A process in accordance with claim 2 in which the relative amounts of the components of each said mixture are such that the lowest temperature at which each said mixture is entirely liquid is within the range of about 10°

C. or below, and steps (b) and (c) are performed at room temperature.

6. A process in accordance with claim 1 in which said liquid oxidizer mixture is ammonium nitrate, hydrazinium nitrate and hydroxylammonium nitrate.

7. A process in accordance with claim 6 in which the composition of said liquid oxidizer mixture, in parts by weight based on 100 parts total, is:

about 3 to about 62 parts ammonium nitrate and hydrazinium nitrate combined, and

about 35 to about 97 parts hydroxylammonium nitrate,

and steps (b) and (c) are performed at room temperature.

8. A process in accordance with claim 6 in which the composition of said liquid oxidizer mixture, in parts by weight based on 100 parts total, is:

about 10 to about 30 parts ammonium nitrate,

about 30 to about 50 parts hydrazinium nitrate, and

about 30 to about 60 parts hydroxylammonium nitrate,

and steps (b) and (c) are performed at room temperature.

9. A process in accordance with claim 1 in which said liquid oxidizer mixture is ammonium nitrate and hydroxylammonium nitrate.

10. A process in accordance with claim 9 in which the composition of said liquid oxidizer mixture, in parts by weight based on 100 parts total, is:

about 3 to about 35 parts ammonium nitrate, and

about 65 to about 97 parts hydroxylammonium nitrate,

and steps (b) and (c) are performed at room temperature.

11. A process in accordance with claim 9 in which the composition of said liquid oxidizer mixture, in parts by weight based on 100 parts total, is:

about 25 to about 35 parts ammonium nitrate, and

about 65 to about 75 parts hydroxylammonium nitrate,

and steps (b) and (c) are performed at room temperature.

12. A process in accordance with claim 1 in which said liquid oxidizer mixture is hydrazinium nitrate and hydroxylammonium nitrate.

13. A process in accordance with claim 12 in which the composition of said liquid oxidizer mixture, in parts by weight based on 100 parts total, is:

about 3 to about 55 parts hydrazinium nitrate, and

about 55 to about 97 parts hydroxylammonium nitrate,

and steps (b) and (c) are performed at room temperature.

14. A process in accordance with claim 12 in which the composition of said liquid oxidizer mixture, in parts by weight based on 100 parts total, is:

about 25 to about 35 parts hydrazinium nitrate, and

about 65 to about 75 parts hydroxylammonium nitrate,

and steps (b) and (c) are performed at room temperature.

15. A process in accordance with claim 1 in which said liquid oxidizer mixture is ammonium nitrate, hydrazinium nitrate and lithium nitrate.

16. A process in accordance with claim 15 in which the lowest temperature at which each said mixture is entirely liquid is within the range of about 27°

C. to about 30°

C.

17. A process in accordance with claim 15 in which the composition of said liquid oxidizer mixture, in parts by weight based on 100 parts total, is:

about 31 to about 43 parts ammonium nitrate,

about 37.5 to about 51.5 parts hydrazinium nitrate, and

about 15.5 to about 21.5 parts lithium nitrate.

18. A process in accordance with claim 1 in which said binder is a member selected from the group consisting of polyvinyl alcohols, polyacrylamides and polyammonium acrylates, and said fuel is aluminum.

19. A process in accordance with claim 1 in which the relative amounts of said liquid oxidizer mixture, said binder and said fuel used in step (b) are such that said liquid oxidizer mixture comprises from about 40% to about 80% by weight of said curable liquid energetic composition.

20. A process in accordance with claim 1 in which the relative amounts of said liquid oxidizer mixture, said binder and said fuel used in step (b) are such that said liquid oxidizer mixture comprises from about 40% to about 80% by weight of said curable liquid energetic composition, and said metallic fuel comprises from about 10% to about 40% by weight of said energetic formulation.

21. An energetic formulation prepared by the process of claim 1.

22. An energetic formulation prepared by the process of claim 8.

23. An energetic formulation prepared by the process of claim 10.

24. An energetic formulation prepared by the process of claim 14.

25. An energetic formulation prepared by the process of claim 17.