Fire extinguishing composition
A fire extinguishing composition is described. The fire extinguishing composition comprises water in an amount of ≤75.0% by weight; a fire extinguishing salt in an amount of ≥15.0% by weight; and a film forming agent. Uses of the fire extinguishing composition and a fire extinguisher comprising the fire extinguishing composition are also described.
1. A fire extinguishing composition comprising:
(a) water in an amount of 35.0 to 75.0% by weight;
(b) a fire extinguishing salt in an amount of ≥25.0% by weight, wherein the fire extinguishing salt comprises a phosphate salt and a sulphate salt, wherein the phosphate salt is in an amount of 20.0 to 50.0% by weight and the sulphate salt is in an amount of 5.0 to 10.0% by weight; and
(c) a film forming agent in an amount of from 0.05 to 5.0% by weight, wherein the film forming agent comprises a fluorinated surfactant.
2. The fire extinguishing composition according to claim 1 , wherein the film forming agent comprises a partially fluorinated surfactant.
3. The fire extinguishing composition according to claim 1 , wherein the phosphate salt is monoammonium phosphate.
4. The fire extinguishing composition according to claim 1 , wherein the phosphate salt is in an amount of 30.0 to 42.5% by weight.
5. The fire extinguishing composition according to claim 1 , wherein the sulphate salt is ammonium sulphate.
6. The fire extinguishing composition according to claim 1 , wherein the sulphate salt is in an amount of 5.5 to 8.0% by weight.
7. The fire extinguishing composition according to claim 1 , which comprises an alcohol.
8. The fire extinguishing composition according to claim 7 , wherein the alcohol is in an amount of from 0.01 to 0.75% by weight.
9. The fire extinguishing composition according to claim 1 , which comprises a preservative.
10. The fire extinguishing composition according to claim 1 , which comprises a non-ionic surfactant.
11. The fire extinguishing composition according to claim 1 , which comprises a foaming agent.
12. The fire extinguishing composition according to claim 1 , which is foam.
13. A fire extinguisher comprising a container, wherein the container comprises the fire extinguishing composition according to claim 1 .
14. The fire extinguisher according to claim 13 , wherein the container is a pressurized cannister comprising a propellant.
15. A method of extinguishing a fire comprising:
administering a fire extinguishing composition as defined in claim 1 to the fire.
16. The method according to claim 15 , wherein the fire is caused by the burning of a solid combustible material and/or the burning of a flammable liquid.