BACKGROUND OF THE INVENTION

Field of the Invention

This invention concerns novel halogen containing compounds and fire extinguishing units including one or more fire extinguishing compounds.

Description of the Art

Halon 1301 is the predominant fire extinguishing agent used on aircraft. Halon 1301 is currently a banned substance with few exceptions. One such exception is its use as an aircraft fire extinguishing agent. However, even with this exception, new fire extinguishing compounds are needed because Halon 1301, as a banned substance, is no longer manufactured and eventually the current supply will be depleted. There is a need, therefore, for new fire extinguishing compounds and fire extinguishing units that contain them.

SUMMARY OF THE INVENTION

A first aspect of this invention is new compounds with fire extinguishing properties having the formula:


wherein R1is —CR5R6R7or —CR5R6CR8R9R10;

R2, R3and R4are each independently selected from halogen and hydrogen; and

R5, R6, R7, R8, R9and R10are each independently selected from halogen and hydrogen, wherein at least one of R5, R6, R7, R8, R9and R10is halogen;

wherein when R1is —CR5R6CR8R9R10and R8, R9and R10are each F, then at least one of R2, R3and R4is halogen;

wherein when R1is —CR5R6CR8R9R10and R8, R9and R10are each F and when R2is Br then one of R3and R4is halogen, or one of R5and R6is hydrogen;

wherein when R1is —CR5R6R7and R5, R6, R7are each F and R2is Br, then R3is halogen when R4is selected from hydrogen or Br, or R3is selected from hydrogen, Cl, Br or I when R4is F; and

wherein when R1is —CR5R6R7and R5, R6, R7are each F and R2is I, then R3is halogen when R4is hydrogen, or R3is selected from hydrogen, F, Cl and I when R4is F.

In the above compounds: two or more substituents selected from R2, R3and R4may be halogen; R2, R3and R4may each be halogen; and/or R2, R3and R4may each be independently selected from hydrogen, Br, Cl and I.

In the above compounds, R1may be —CR5R6R7in which case R5, R6and R7may each be halogen or R5, R6, and R7may each be F.

In the above compounds, R1may be —CR5R6CR8R9R10in which case R8, R9and R10may each be halogen; or R8, R9, and R10may each be F.

In the above compounds, R1may be —CR5R6CR8R9R10in which case R5and R6may each be halogen; or R5and R6may each be F.

In another aspect, the above compound may be 2-iodoperfluoro-1-butene; 2,3-dibromo-4,4,4-trifluoro-1-butene; 2-iodoperfluoro-1-butene; 2-bromoperfluoro-1-butene; 3-iodo-3,4,4,4-tetrafluoro-1-butene; 1-iodo-4,4,4-trifluoro-1-butene; 2-bromo-3,3,4,4,4-pentafluoro-1-butene; 1-bromo-4,4,4-trifluoro-1-butene; 2-chloro-3,3,4,4,4-pentafluoro-1-butene; and isomers thereof.

Yet another aspect of this invention are fire extinguishing units comprising a container and delivery system, the container containing at least one fire extinguishing compound having the formula:


wherein R1is —CR5R6R7or —CR5R6CR8R9R10;

R2, R3and R4are each independently selected from halogen or hydrogen wherein at least one of R2, R3and R4must be halo; and

R5, R6, R7, R8, R9and R10are each independently selected from halogen or hydrogen wherein at least one of R5, R6, R7, R8, R9and R10must be halogen;

wherein when R1is —CR5R6CR8R9R10and R8, R9and R10are each F, then at least one of R3and R4is halogen when R2is hydrogen, or R2is Cl, F or I when R3and R4are both hydrogen; and

wherein when R1is —CR5R6R7and R5, R6, R7are each F then R2, R3and R4are each hydrogen or halogen, or when R2is Br then R3is selected from halogen and R4is selected from hydrogen, Cl, F and I.

In the above fire extinguishing unit, the fire extinguishing compound may include substituents R2, R3and R4wherein two or more of the substituents are halogen; or where each substituent is halogen; or where each substituent is selected from hydrogen, Br, Cl and I.

In the above fire extinguishing unit, the fire extinguishing compound includes substituent R1that may be —CR5R6R7in which case R5, R6, and R7may each be halogen; or R5, R6, and R7may each be F.

In the above fire extinguishing unit, the fire extinguishing compound includes substituent R1that may be —CR5R6CR8R9R10in which case R8, R9, and R10may each be halogen; or R8, R9, and R19may each be F; or in which case R5and R6may each be halogen or may each be F.

In the above fire extinguishing unit, the fire extinguishing compound may be selected from 2-iodoperfluoro-1-butene; 2,3-dibromo-4,4,4-trifluoro-1-butene; 2-iodoperfluoro-1-butene; 2-bromoperfluoro-1-butene; 3-iodo-3,4,4,4-tetrafluoro-1-butene; 1-iodo-4,4,4-trifluoro-1-butene; 2-bromo-3,3,4,4,4-pentafluoro-1-butene; 1-bromo-4,4,4-trifluoro-1-butene; 2-chloro-3,3,4,4,4-pentafluoro-1-butene; 2-bromo-1,1,3,3,3-pentafluoropropene; 2-iodo-1,1,3,3,3-pentafluoropropene; 2-iodo-3,3,3-trifluoropropene, isomers thereof and combinations thereof.

