Fire extinguishing compositions containing fluorinated surfactants

A surface-active fluorinated composition characterized by the association therein of from 35% to about 60% of at least one surface-active ampholyte compound of the formula ##EQU17## wherein n is an integer between 1 and 20, a is a number between 2 and 10, R.sub.1 is an atom of hydrogen or an alkyl radical containing from 1 to 6 atoms of carbon, R.sub.2 and R.sub.3 are alkyl radicals containing from 1 to 3 atoms of carbon, at least one of which is the methyl radical and p and q are integers between 0 and 10;

• from about 20% to about 40% of at least one surface-active fluorinated non-ionic compound of the formula
• C.sub.n F.sub.2n.sub.+1 -- (CH.sub.2).sub.a -- CO--O(CH.sub.2 --CH.sub.2 --O).sub.m R.sub.4
• wherein n and a have the same meaning as above, m is an integer between 1 and 20 and R.sub.4 is an alkyl radical containing from 1 to 6 atoms of carbon;
• and from about 8% to about 40% of at least one diamine salt compound of the formula ##EQU18## wherein n, a, p, R.sub.1, R.sub.2 and R.sub.3 have the same meaning as above, or at least one amine salt compound of the formula ##EQU19## wherein n and a have the same meaning as above, X is the group CO or SO.sub.2, R.sub.1, R.sub.5 and R.sub.6 may be hydrogen atoms, alkyl radicals containing from 1 to 6 atoms of carbon, hydroxyalkyl radicals containing from 1 to 3 atoms of carbon, or the group ##EQU20## in which R.sub.2, R.sub.3, p and q have the values given above