Spectrally balanced infrared flare pyrotechnic composition
AssigneeAlliant Techsystems Inc.
InventorsDavid W. Herbage, Stan L. Salvesen
Life of this patent
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Abstract
A combination of a first and a second composition provide an adjustable spectrally balanced infrared flare usable to decoy missiles. The first composition includes boron, aluminum, ammonium perchlorate, potassium nitrate and Viton.RTM. A fluoroelastomer. The second composition includes magnesium, polytetrafluoroethylene and Viton.RTM. A fluoroelastomer. Adjusting the ratios between the compositions matches any particular aircraft's spectral signature.
Claims7
A pyrotechnic composition comprising on a weight total percent basis:
- a) from about 40 to about 100% of a first formulation and from about 60 to about 0% of a second formulation;
- b) said first formulation comprising from about 4 to about 9% boron, from about 8 to about 16% aluminum, from about 7 to about 13% hexamine, a binder in an amount of about 3 to about 20%, said binder being selected from the group consisting of a fluoroelastomer copolymer and a synthetic rubber binder, and from about 44 to about 70% ammonium perchlorate;
- and
- c) said second formulation comprising from about 45 to about 70% magnesium, from about 25 to about 50% polytetrafluoroethylene and a binder in an amount of about 3 to about 20%, said binder being selected from the group consisting of a fluoroelastomer copolymer and a synthetic rubber binder.
A pyrotechnic composition comprising on a weight percent basis about 4% boron, about 10% aluminum, about 10% magnesium, about 8% hexamine, about 42% ammonium perchlorate, about 7% potassium nitrate, about 5% polytetrafluoroethylene and about 14% fluoroelastomer.
A pyrotechnic composition comprising on a weight total percent basis:
- a) from about 40 to about 100% of a first formulation and from about 60 to about 0% of a second formulation;
- b) said first formulation comprising from about 4 to about 9% boron, from about 8 to about 16% aluminum, from about 7 to about 13% hexamine, a binder in an amount of about 3 to about 20%, said binder being selected from the group consisting of a fluoroelastomer copolymer and a synthetic rubber binder, and from about 44 to about 70% ammonium perchlorate;
- and
- c) said second formulation comprising from about 45 to about 70% magnesium, from about 25 to about 50% polytetrafluoroethylene and a binder in an amount of about 3 to about 20%, said binder being selected from the group consisting of a fluoroelastomer copolymer and a synthetic rubber binder, wherein said first formulation binder includes a fluoroelastomer copolymer in the amount of between about 10 to about 20% and said ammonium perchlorate is between about 44 to about 58%.
A pyrotechnic composition comprising on a weight total percent basis:
- a) from about 40 to about 100% of a first formulation and from about 60 to about 0% of a second formulation;
- b) said first formulation comprising from about 4 to about 9% boron, from about 8 to about 16% aluminum, from about 7 to about 1.3% hexamine, a binder in an amount of about 3 to about 20%, said binder being selected from the group consisting of a fluoroelastomer copolymer and a synthetic rubber binder, and from about 44 to about 70% ammonium perchlorate;
- and
- c) said second formulation comprising from about 45 to about 70% magnesium, from about 25 to about 50% polytetrafluoroethylene and a binder in an amount of about 3 to about 20%, said binder being selected from the group consisting of a fluoroelastomer copolymer and a synthetic rubber binder, wherein said first formulation binder includes a synthetic rubber binder in the amount of between about 3 to about 10% and said ammonium perchlorate is between about 44 to about 70%.
A pyrotechnic composition comprising on a weight total percent basis:
- a) from about 40 to about 100% of a first formulation and from about 60 to about 0% of a second formulation;
- b) said first formulation comprising from about 4 to about 9% boron, from about 8 to about 16% aluminum, from about 7 to about 13% hexamine, a binder in an amount of about 3 to about 20%, said binder being selected from the group consisting of a fluoroelastomer copolymer and a synthetic rubber binder, and from about 44 to about 70% ammonium perchlorate;
- and
- c) said second formulation comprising from about 45 to about 70% magnesium, from about 25 to about 50% polytetrafluoroethylene and a binder in an amount of about 3 to about 20%, said binder being selected from the group consisting of a fluoroelastomer copolymer and a synthetic rubber binder, wherein said second formulation binder includes a synthetic rubber binder in the amount of between about 3 to about 10% and said polytetrafluoroethylene is between about 25 to about 50%.
A method for producing a decoy flare composition which when burned produces an infrared signature which resembles an infrared signature of a selected aircraft comprising the steps of:
- (a) determining the infrared signature of the aircraft to be protected by a decoy flare;
- (b) obtaining a first formulation comprising from about 4 to about 9% boron, from about 8 to about 16% aluminum, from about 7 to about 13% hexamine, from about 44 to about 70% ammonium perchlorate and a binder in an amount of about 3 to about 20%, said binder being selected from the group consisting of a fluoroelastomer copolymer and a synthetic rubber binder;
- obtaining a second formulation comprising from about 45 to about 70% magnesium, from about 25 to about 50% polytetrafluoroethylene and a binder in an amount of about 3 to about 20%, said binder being selected from the group consisting of a fluoroelastomer copolymer and a synthetic rubber binder;
- (c) determining the percentage ratio of said first composition to said second composition which will produce a matching spectral output to the aircraft infrared signature;
- and
- (d) compounding a decoy flare composition accordingly.
Dependencies are inferred from the claim text.