Fire extinguishing composition and method for preparing same

摘要

There is disclosed, in one aspect, a dispensable flame-extinguishing composition comprising approximately 5 to approximately 20 percent by weight bromotrifluoromethane and approximately 95 to approximately 80 percent by weight bromochlorodifluoromethane and a residual air weight at 70 DEG F. which varies inversely to the degree of vacuum pulled under constant volume. For vessels ranging in size from 127 mls. to 325 mls. at a temperature of 70 DEG F. the amount and weight of residual air will vary from approximately 0.047 grams to 0.390 grams for a 22'' Hg vacuum to no vacuum being pulled. The composition utilizes residual air to dispense the extinguishing agents in the temperature range of -40 DEG F. to room temperatures. In another aspect, there is disclosed a method for extinguishing fires. This method comprises applying to the fire the above-described composition. This composition is particularly useful in hand-held fire extinguishers.