Compositions usable as flare compositions

Patent metadata

Field	Value
Publication number	US-10479738-B2
Application number	US-201816208840-A
Country	US
Kind code	B2
Filing date	Dec 4, 2018
Priority date	Oct 16, 2014
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

A composition that includes a fuel and a perfluoropolyether (PFPE) is disclosed. The composition may be used as a flare composition in a countermeasure device. Countermeasure devices including the flare composition are also disclosed, as are methods of forming grains of the countermeasure device.

First claim

What is claimed is:

1. A composition, comprising:
a fuel;
a perfluoropolyether (PFPE) having a chemical structure of HO(CH 2 CH 2 O) n CH 2 CF 2 O(CF 2 CF 2 O) p (CF 2 O) q CF 2 CH 2 (OCH 2 CH 2 ) n OH and a fluorine content of about 57% by weight of the PFPE, where n is an integer between 1 and 10, p is an integer between 1 and 50, and q is an integer between 1 and 50; and
an isocyanate compound,
the PFPE comprising from about 15 wt % to about 35 wt % of the composition.

2. The composition of claim 1 , wherein the PFPE comprises from about 20 wt % to about 35 wt % of the composition.

3. The composition of claim 1 , wherein the PFPE comprises from about 30 wt % to about 35 wt % of the composition.

4. The composition of claim 1 , wherein the fuel comprises magnesium.

5. The composition of claim 1 , wherein the fuel comprises magnesium and aluminum.

6. The composition of claim 1 , further comprising boron.

7. The composition of claim 1 , further comprising polytetrafluoroethylene.

8. The composition of claim 1 , further comprising polytetrafluoroethylene, a terpolymer of tetrafluoroethylene, hexafluoropropylene, and vinylidene fluoride, a copolymer of tetrafluoroethylene and perfluorovinylether, a copolymer of tetrafluoroethylene and ethylene, or a copolymer of tetrafluoroethylene and hexafluoropropylene.

9. A composition, comprising:
a fuel;
a perfluoropolyether (PFPE) having a chemical structure of HO(CH 2 CH 2 O) n CH 2 CF 2 O(CF 2 CF 2 O) p (CF 2 O) q CF 2 CH 2 (OCH 2 CH 2 ) n OH and a fluorine content of about 57% by weight of the PFPE, where n is an integer between 1 and 10, p is an integer between 1 and 50, and q is an integer between 1 and 50; and
an isocyanate compound,
the PFPE comprising from about 20 wt % to about 35 wt % of the composition.

10. The composition of claim 9 , wherein the fuel comprises at least one of magnesium and aluminum.

11. The composition of claim 9 , wherein the fuel comprises zirconium.

12. The composition of claim 9 , further comprising carbon.

13. The composition of claim 9 , further comprising a cure catalyst.

14. The composition of claim 9 , further comprising boron, phosphorous, or silicon.

15. A composition, comprising:
a fuel;
a perfluoropolyether (PFPE) having a chemical structure of HO(CH 2 CH 2 O) n CH 2 CF 2 O(CF 2 CF 2 O) p (CF 2 O) q CF 2 CH 2 (OCH 2 CH 2 ) n OH and a fluorine content of about 57% by weight of the PFPE, where n is an integer between 1 and 10, p is an integer between 1 and 50, and q is an integer between 1 and 50; and
an isocyanate compound,
the PFPE comprising from about 15 wt % to about 35 wt % of the composition, and the composition formulated to produce an infrared intensity of at least about 95% of an infrared intensity of a composition comprising magnesium, polytetrafluoroethylene, and a copolymer of vinylidenefluoride and hexafluoropropylene (MTV composition).

16. The composition of claim 15 , wherein the composition is formulated to produce an infrared intensity greater than or equivalent to the infrared intensity of the MTV composition.

17. The composition of claim 15 , wherein the composition is formulated to produce a comparable or increased burn time compared to the MTV composition.

18. The composition of claim 15 , wherein the composition is formulated to produce a burn time of from about 1.5 times to about 2 times greater than that of the MTV composition.

19. The composition of claim 15 , wherein the composition is formulated to produce a comparable or increased rise time compared to the MTV composition.

20. The composition of claim 15 , wherein the composition is formulated to produce a rise time of at least about 95% of the rise time of the MTV composition.

Assignees

• Northrop Grumman Innovation Systems Inc

Inventors

• Nielson Daniel B
• Fielding Curtis W

Classifications

• C06B43/00 Primary

  Compositions characterised by explosive or thermic constituents not provided for in groups C06B25/00 - C06B41/00 · CPC title

• C06C15/00

  Pyrophoric compositions; Flints (chemical lighters C06C9/00) · CPC title

• F42B4/26

  Flares; Torches {(mines for practice or training containing flares or illuminating charges F42B8/28; projectiles of illuminating type F42B12/42)} · CPC title

• C06B27/00 Primary

  Compositions containing a metal, boron, silicon, selenium or tellurium or mixtures, intercompounds or hydrides thereof, and hydrocarbons or halogenated hydrocarbons · CPC title