초록

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.

대표청구항 ▼

1. A composition, comprising: a fuel;a perfluoropolyether (PFPE) having a chemical structure of HO(CH2CH2O)nCH2CF2O(CF2CF2O)p(CF2O)qCF2CH2(OCH2CH2)nOH 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 inte

1. A composition, comprising: a fuel;a perfluoropolyether (PFPE) having a chemical structure of HO(CH2CH2O)nCH2CF2O(CF2CF2O)p(CF2O)qCF2CH2(OCH2CH2)nOH 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; andan isocyanate compound,the PFPE comprising from about 20% by weight (wt %) to about 30 wt % of the composition. 2. The composition of claim 1, wherein the fuel comprises aluminum, bismuth, copper, iron, hafnium, magnesium, nickel, palladium, tantalum, tin, titanium, zinc, zirconium, or an alloy thereof. 3. The composition of claim 1, wherein the fuel comprises aluminum, bismuth, copper, iron, hafnium, magnesium, nickel, palladium, tin, titanium, zinc, zirconium, or an alloy thereof. 4. The composition of claim 1, wherein the fuel comprises an alloy of magnesium and aluminum. 5. The composition of claim 1, wherein the fuel comprises from about 50 wt % to about 70 wt % of the composition. 6. The composition of claim 1, wherein the fuel comprises from about 57 wt % to about 60 wt % of the composition. 7. The composition of claim 1, wherein the fuel comprises from about 58 wt % to about 60 wt % of the composition. 8. The composition of claim 1, wherein the fuel comprises from about 57.3 wt % to about 59.9 wt % of the composition. 9. The composition of claim 1, wherein the PFPE comprises from about 23 wt % to about 26 wt % of the composition. 10. The composition of claim 1, wherein the PFPE comprises from about 23.5 wt % to about 25.9 wt % of the composition. 11. The composition of claim 1, wherein the composition comprises an alloy of magnesium and aluminum, the PFPE, and polytetrafluoroethylene. 12. The composition of claim 11, further comprising triphenyl tin chloride or triphenyl bismuth. 13. The composition of claim 11, further comprising phenolphthalein. 14. The composition of claim 11, further comprising carbon black. 15. The composition of claim 11, further comprising octadecyl isocyanate. 16. The composition of claim 11, wherein the polytetrafluoroethylene comprises micronized polytetrafluoroethylene. 17. The composition of claim 1, wherein the isocyanate compound comprises isophorone diisocyanate and a polyisocyanate based on hexamethylene diisocyanate. 18. A composition, comprising: an alloy of magnesium and aluminum, an isocyanate compound, and a perfluoropolyether (PFPE) having a chemical structure of HO(CH2CH2O)nCH2CF2O(CF2CF2O)p(CF2O)qCF2CH2(OCH2CH2)nOH 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, the PFPE comprising from about 20 wt % to about 30 wt % of the composition. 19. A countermeasure device comprising a casing and a flare composition contained in the casing, the flare composition comprising: a fuel, a perfluoropolyether (PFPE) having a chemical structure of HO(CH2CH2O)nCH2CF2O(CF2CF2O)p(CF2O)qCF2CH2(OCH2CH2)nOH 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 30 wt % of the flare composition. 20. A method of forming grains of a countermeasure device, comprising: forming a flare composition comprising a fuel, an isocyanate compound, and a perfluoropolyether (PFPE) having a chemical structure of HO(CH2CH2O)nCH2CF2O(CF2CF2O)p(CF2O)qCF2CH2(OCH2CH2)nOH 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, the PFPE comprising from about 20 wt % to about 30 wt % of the flare composition; andcasting the flare composition into grains. 21. The method of claim 20, wherein forming a flare composition comprising a fuel, an isocyanate compound, and a perfluoropolyether (PFPE) comprises forming the flare composition having a viscosity of less than or equal to about 8 kP at 100° F. 22. The method of claim 20, wherein forming a flare composition comprising a fuel, an isocyanate compound, and a perfluoropolyether (PFPE) comprises forming the flare composition comprising an alloy of magnesium and aluminum, the isocyanate compound, and the perfluoropolyether (PFPE). 23. A composition, comprising: a fuel;a perfluoropolyether (PFPE) having a chemical structure of HO(CH2CH2O)nCH2CF2O(CF2CF2O)p(CF2O)qCF2CH2(OCH2CH2)nOH 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; andan isocyanate compound comprising isophorone diisocyanate; andtrimethylolpropane ethoxylate.