Plasticized flexible pyrotechnic material

Patent metadata

Field	Value
Publication number	US-12049433-B2
Application number	US-202117203325-A
Country	US
Kind code	B2
Filing date	Mar 16, 2021
Priority date	Mar 24, 2020
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

A plasticized pyrotechnic material can be easily portioned and formed or molded into a desired shape and burns at a high temperature (>2000° C.) but does not detonate. The plasticized pyrotechnic material may preferably include a combination of about 70-99% by weight of a pyrotechnic composition and about 1-30% by weight of a plasticizer composition comprising various low to mid molecular weight polyisobutylenes. The pyrotechnic material comprises inorganic oxidizers (e.g. metal oxides, oxohalide salts, nitrates, nitrites, chlorates/perchlorates) and metal or metal oxides powders mixed intimately. The plasticizer may include a small amount of a fluoropolymer, such as polytetrafluoroethylene (PTFE) and may also include up to 1-2% by weight of a processed oil, such as a mineral oil or motor oil. Some embodiments may also include a biocide precursor molecule.

First claim

What is claimed:

1. A plasticized flexible pyrotechnic material for use in destroying hazardous materials, comprising a combination of:
50-99% by weight of a pyrotechnic composition comprising an inorganic oxidizer and metal or metal oxide powders;
1-50% by weight of a polymer plasticizer composition comprising one ore more low to mid molecular weight polyisobutylenes in the range of M n from 500 to 1,300,000; and
an iodine based biocide precursor,
wherein said plasticized, flexible pyrotechnic material has a putty-like texture and is easily portioned and formed or molded into a desired shape for application to a hazardous material, and which burns at a temperature greater than 2000 degree C. and releases gaseous I 2 , for the destruction of hazardous bio-organisms, but does not detonate.

2. The pyrotechnic material of claim 1 wherein the plasticizer composition further comprises a fluoropolymer.

3. The pyrotechnic material of claim 1 further comprises about 1-2% by weight of a processed oil.

4. The pyrotechnic material of claim 2 further comprises about 1-2% by weight of a processed oil.

5. The pyrotechnic material of claim 1 comprising a combination of:
70-99% by weight of a pyrotechnic composition comprising an inorganic oxidizer and metal or metal oxide powders; and
1-30% by weight of a plasticizer composition.

6. The pyrotechnic material of claim 2 comprising a combination of:
70-99% by weight of a pyrotechnic composition comprising an inorganic oxidizer and metal or metal oxide powders; and
1-30% by weight of a plasticizer composition.

7. A method of destroying a hazardous material in situ comprising the steps of:
identifying a hazardous threat material at a location;
providing a sheet or block of a plasticized flexible pyrotechnic material comprising a combination of:
50-99% by weight of a pyrotechnic composition comprising an inorganic oxidizer and metal or metal oxide powders;
1-50% by weight of a polymer plasticizer composition comprising one ore more low to mid molecular weight polyisobutylenes in the range of M n from 500 to 1,300,000; and
an iodine based biocide precursor,
wherein said plasticized, flexible pyrotechnic material has a putty-like texture and is easily portioned and formed or molded into a desired shape for application to said hazardous threat material, and which burns at a temperature greater than 2000 degree C. and releases gaseous I 2 , for the destruction of hazardous bio-organisms, but does not detonate;
selecting an appropriately sized portion of the plasticized flexible pyrotechnic material from the sheet or block;
forming the portioned pyrotechnic material into a predetermined shape to cover the hazardous material in situ;
igniting the portioned pyrotechnic material to destroy the hazardous material without detonation.

8. The method of claim 7 wherein the plasticizer composition further comprises a fluoropolymer.

9. The method of claim 7 wherein the pyrotechnic material further comprises about 1-2% by weight of a processed oil.

10. The method of claim 8 wherein the pyrotechnic material further comprises about 1-2% by weight of a processed oil.

11. The method of claim 7 wherein the pyrotechnic material comprises a combination of:
70-99% by weight of a pyrotechnic composition comprising an inorganic oxidizer and metal or metal oxide powders; and
1-30% by weight of a plasticizer composition.

12. The method of claim 8 wherein the pyrotechnic material comprises a combination of:
70-99% by weight of a pyrotechnic composition comprising an inorganic oxidizer and metal or metal oxide powders; and
1-30% by weight of a plasticizer composition.

Assignees

• Univ Of Rhode Island Board Of Trustees

Inventors

• Oxley Jimmie
• Smith James L
• Busby Taylor
• Kominia Athina

Classifications

• A62D3/38 Primary

  by oxidation; by combustion · CPC title

• C06C15/00

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

• A62D2203/00

  Aspects of processes for making harmful chemical substances harmless, or less harmful, by effecting chemical change in the substances · CPC title

• A62D2101/06

  Explosives, propellants or pyrotechnics, e.g. rocket fuel or napalm · CPC title

• A62D2101/02

  Chemical warfare substances, e.g. cholinesterase inhibitors · CPC title