The present invention provides a chlorine-containing pyrotechnic composition which is substantially free of per-chlorate which composition comprises a nitrocellulose which is derived from a fibrous nitrocellulose starting material that has at least partially been dissolved during the process of prep
The present invention provides a chlorine-containing pyrotechnic composition which is substantially free of per-chlorate which composition comprises a nitrocellulose which is derived from a fibrous nitrocellulose starting material that has at least partially been dissolved during the process of preparing the pyrotechnic composition, and a colorant. The invention further provides a firework article comprising said pyrotechnic composition, and a method for preparing the same.
대표청구항▼
1. A pyrotechnic composition comprising: chlorine;an at least partially gelantinized nitrocellulose which is derived from a fibrous nitrocellulose starting material that has at least partially been dissolved during the process of preparing the pyrotechnic composition; anda colorant,wherein the pyrot
1. A pyrotechnic composition comprising: chlorine;an at least partially gelantinized nitrocellulose which is derived from a fibrous nitrocellulose starting material that has at least partially been dissolved during the process of preparing the pyrotechnic composition; anda colorant,wherein the pyrotechnic composition is substantially free of perchlorate,wherein the colorant is chosen from the group consisting of strontium aminotetrazole, barium aminotetrazole, strontium nitrate, barium nitrate, and barium chlorate, andwherein the colorant comprises strontium aminotetrazole or barium aminotetrazole. 2. A composition according to claim 1, wherein the nitrocellulose is present in an amount in the range of from 20-96 wt %, based on total pyrotechnic composition. 3. A composition according to claim 1 wherein the nitrocellulose has a nitrogen content of less than 14 wt %. 4. A composition according to claim 2, wherein the nitrocellulose has a nitrogen content in the range of from 12 to 13.5 wt %. 5. A composition according to claim 2, wherein the nitrocellulose is present in an amount of 85-95 wt %, based on total pyrotechnic composition. 6. A composition according to claim 1, wherein at least 3 wt % of the fibrous nitrocellulose starting material has been dissolved during the process of preparing the pyrotechnic composition. 7. A composition according to claim 6, wherein 3-80 wt % of the fibrous nitrocellulose starting material has been dissolved during the process of preparing the pyrotechnic composition. 8. A composition according to claim 1, wherein the fibrous nitrocellulose starting material is at least partly dissolved using a mixture of organic solvents. 9. A composition according to claim 1, wherein the colorant is present in an amount in the range of from 1-10 wt %, based on total pyrotechnic composition. 10. A composition according to claim 1, wherein chlorine is present in an amount of from 1 to 20 wt %, based on total pyrotechnic composition. 11. A composition according to claim 1, wherein the chlorine is provided by ammonium chloride, Pergut, Alloprene, PVC, Superchlon, hexachlorethane or hexachlorobenzene. 12. A chlorine-containing pyrotechnic composition which is substantially free of perchlorate which composition comprises a nitrocellulose which is derived from a fibrous nitrocellulose starting material that has at least partially been dissolved during the process of preparing the pyrotechnic composition, and a colorant, wherein the chlorine is provided by a donor comprising ammonium chloride. 13. A composition according to claim 1 which in addition comprises an oxidator in an amount in the range of from 1-80 wt %, based on total pyrotechnic composition. 14. A composition according to claim 13, wherein the oxidator is chosen from the group consisting of KNO3, NH4NO3, Sr(NO3)2, and Ba(NO3)2. 15. A composition according to claim 14, wherein the oxidator comprises NH3NO3, Sr(NO3)2 or Ba(NO3)2. 16. A pyrotechnic composition comprising: chlorine;an at least partially gelantinized nitrocellulose which is derived from a fibrous nitrocellulose starting material that has at least partially been dissolved during the process of preparing the pyrotechnic composition; anda colorant,wherein the pyrotechnic composition is substantially free of perchlorate andwherein the composition further comprises a metal salt of (5-aminotetrazole) in an amount in the range of from 1-10 wt %, based on total pyrotechnic composition. 17. A composition according to claim 16, wherein the metal comprises barium, strontium or copper. 18. The composition according to claim 12, wherein the nitrocellulose is present in an amount in the range of from 20-96 wt %, based on total pyrotechnic composition. 19. The composition according to claim 12, wherein the nitrocellulose has a nitrogen content of less than 14 wt %. 20. The composition according to claim 12, wherein 3-80 wt % of the fibrous nitrocellulose starting material has been dissolved during the process of preparing the pyrotechnic composition. 21. The composition according to claim 12, wherein the fibrous nitrocellulose starting material is at least partly dissolved using a mixture of organic solvents. 22. A composition according to claim 16, wherein the nitrocellulose is present in an amount in the range of from 20-96 wt %, based on total pyrotechnic composition. 23. A composition according to claim 22, wherein the nitrocellulose is present in an amount of 85-95 wt %, based on total pyrotechnic composition. 24. A composition according to claim 16, wherein the nitrocellulose has a nitrogen content of less than 14 wt %. 25. A composition according to claim 16, wherein the nitrocellulose has a nitrogen content in the range of from 12 to 13.5 wt %. 26. A composition according to claim 16, wherein at least 3 wt % of the fibrous nitrocellulose starting material has been dissolved during the process of preparing the pyrotechnic composition. 27. A composition according to claim 26, wherein 3-80 wt % of the fibrous nitrocellulose starting material has been dissolved during the process of preparing the pyrotechnic composition. 28. A composition according to claim 16, wherein the fibrous nitrocellulose starting material is at least partly dissolved using a mixture of organic solvents. 29. A composition according to claim 16, wherein the colorant is present in an amount in the range of from 1-10 wt %, based on total pyrotechnic composition. 30. A composition according to claim 16, further comprising an oxidator in an amount in the range of from 1-80 wt %, based on total pyrotechnic composition. 31. A composition according to claim 30, wherein the oxidator is chosen from the group consisting of KNO3, NH4NO3, Sr(NO3)2, and Ba(NO3)2. 32. A composition according to claim 31, wherein the oxidator comprises NH3NO3, Sr(NO3)2, or Ba(NO3)2.
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이 특허에 인용된 특허 (5)
Hiskey Michael A. ; Chavez David E., High-nitrogen energetic material based pyrotechnic compositions.
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