Insensitive munition propellants

Patent metadata

Field	Value
Publication number	US-9919980-B2
Application number	US-201414780412-A
Country	US
Kind code	B2
Filing date	Mar 18, 2014
Priority date	Mar 27, 2013
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

The invention relates to Insensitive Munition (IM) energetic materials particularly IM propellant compositions, and yet further to nitrocellulose-free IM propellants.
An energetic composition suitable for use as a propellant comprises the following components in the following relative proportions:
component A; from 5% to 25% by weight of an IM energetic filler;
component B: from 50% to 80% by weight of a highly energetic filler comprising at least one nitramine compound;
component C of from 5% to 20% by weight of a binder; and
component D of from 3% to 15% by weight of a plasticizer;
the percentages by weight of components A, B, C and D together with minor additives, if any, adding to 100%.

First claim

The invention claimed is:

1. An energetic non-nitrocellulose composition suitable for use as a propellant comprises the following components in the following relative proportions:
component A: of from 8% to 12% by weight of an Insensitive Munition (IM) energetic filler, wherein component A is at least one of Nitrotriazolone (NTO), Hexanitrostilbene (HNS), Nitroguanidine (Picrite), and Triaminotrinitrobenzene (TATB);
component B: of from 65% to 75% by weight of a highly energetic filler comprising at least one nitramine compound;
component C: of from 8% to 16% by weight of a binder, wherein the binder includes a non-energetic binder; and
component D: of up to 10% by weight of a plasticiser, which includes an energetic plasticiser present in the range of from 3%-8% by weight and a non-energetic plasticiser present in the range of from 2%-6% by weight, wherein
the percentages by weight of components A, B, C and D together with minor additives, if any, adding to 100%.

2. An energetic composition suitable for use as a propellant comprises the following components in the following relative proportions:
component A: of from 10% to 20% by weight of an Insensitive Munition (IM) energetic filler, wherein component A is at least one of Nitrotriazolone (NTO), Hexanitrostilbene (HNS), Nitroguanidine (Picrite), and Triaminotrinitrobenzene (TATB);
component B: of from 55% to 70% by weight of a highly energetic filler comprising at least one nitramine compound;
component C: of from 10% to 16% by weight of a binder, wherein the binder comprises a non-energetic binder and an energetic binder, and the energetic binder is present in the range of from 5-10% by weight, and the non-energetic binder is present in the range of from 5-15% by weight; and
component D: of from 5% to 10% of a plasticiser, wherein the plasticiser comprises at least one of a non-energetic plasticiser and an energetic plasticiser, and the energetic plasticiser is present up to 8% by weight, and the non-energetic plasticiser is present in the range of from 2%-10% by weight,
wherein the percentages by weight of components A, B, C and D together with minor additives, if any, adding to 100%.

3. A gun propellant comprising sticks or granules comprising a composition according to claim 1 .

4. An energetic composition, according to claim 2 , wherein
component B comprises 65% to 70% by weight,
component C comprises 8% to 12% by weight, and
component D comprises an energetic plasticiser present in the range of from 3%-8% by weight and a non-energetic plasticiser present in the range of from 2%-6% by weight.

5. A gun propellant comprising sticks or granules comprising a composition according to claim 2 .

6. An energetic composition suitable for use as a propellant comprises the following components in the following relative proportions:
component A: of from 5% to 25% by weight of an Insensitive Munition (IM) energetic filler selected from at least one of Nitrotriazolone (NTO), Hexanitrostilbene (HNS), Nitroguanidine (Picrite), and Triaminotrinitrobenzene (TATB);
component B: of from 50% to 80% by weight of a highly energetic filler comprising at least one nitramine compound;
component C: of from 5% to 20% by weight of a binder, wherein the binder comprises a mixture of a non-energetic binder and an energetic binder, with the energetic binder being present in the range of from 5-10% by weight, and the non-energetic binder being present in the range of from 5-15% by weight; and
component D: of from 3% to 15% of a plasticiser, wherein the plasticiser comprises a mixture of a non-energetic plasticiser and an energetic plasticiser with the energetic plasticiser being present up to 8% by weight, and the non-energetic plasticiser being present in the range of from 2%-10% by weight,
wherein the percentages by weight of components A, B, C and D together with minor additives, if any, adding to 100%.

7. A gun propellant comprising sticks or granules comprising a composition according to claim 6 .

8. An energetic composition suitable for use as a propellant comprises the following components in the following relative proportions:
component A; of from 5% to 25% by weight of an IM energetic filler;
component B: of from 70% to 80% by weight of a highly energetic filler comprising at least one nitramine compound;
component C: of from 10% to 20% by weight of a binder comprising a mixture of a non-energetic binder present in the range of from 5-15% by weight and an energetic binder of in the range of from 5-10% by weight; and
component D: of from 3% to 15% by weight of a plasticiser wherein, the plasticiser is a mixture of a non-energetic plasticiser and an energetic plasticiser, and the energetic plasticiser is present up to 8% by weight, and the non-energetic plasticiser is present in the range of from 2%-10% by weight,
wherein the percentages by weight of components A, B, C and D together with minor additives, if any, adding to 100%, provided that component C is other than nitrocellulose.

9. A composition according to claim 8 , wherein:
component A comprises of from 10% to 20% by weight,
component B comprises of from 55% to 70% by weight,
component C comprises of from 8% to 16% by weight and
component D comprises of from 5% to 10% by weight
of the said composition, together with any minor additives, if any, the percentages adding to 100%.

10. An energetic non-nitrocellulose composition according to claim 1 , wherein component A comprises Picrite.

11. An energetic non-nitrocellulose composition according to claim 1 , wherein component B comprises RDX.

12. An energetic non-nitrocellulose composition according to claim 1 , wherein component C comprises EVA.

13. An energetic non-nitrocellulose composition according to claim 1 , wherein component D comprises butyl NENA.

14. An energetic composition according to claim 2 , wherein component A comprises Picrite.

15. An energetic composition according to claim 2 , wherein component B comprises RDX.

16. An energetic composition according to claim 2 , wherein component C comprises EVA.

17. An energetic composition according to claim 2 , wherein component D comprises butyl NENA.

18. An energetic composition according to claim 6 , wherein component A comprises Picrite.

19. An energetic composition according to claim 6 , wherein component B comprises RDX.

20. An energetic composition according to claim 6 , wherein component C comprises EVA.

21. An energetic composition according to claim 6 , wherein component D comprises butyl NENA.

Assignees

• Bae Systems Plc

Inventors

• Penney Mark James
• Wilton Anne Marie
• Somerville Thomas William Delaney

Classifications

• C06B45/105

  The resin being a polymer bearing energetic groups or containing a soluble organic explosive · CPC title

• C06B25/34 Primary

  the compound being a nitrated acyclic, alicyclic or heterocyclic amine · CPC title

• C06B45/10

  the organic component containing a resin · CPC title