Compositions for polar solvent fire fighting containing perfluoroalkyl terminated co-oligomer concentrates and polysaccharides

A composition effective for fighting hydrophilic or polar liquid fires which comprises

• (a) an effective amount of a perfluoroalkyl co-oligomer of formula I R.sub.f --E.sub.m --(S).sub.n --[M.sub.1 ].sub.x --[M.sub.2 ].sub.y --H (I) or a mixture thereof wherein
• R.sub.f is a straight or branched chain perfluoroalkyl of 1 to 20 carbon atoms;
• E is a direct bond or a branched or straight chain alkylene of 2 to 20 carbon atoms or said alkylene interrupted by one to three moieties selected from the group consisting of --NR--, --O--, --S--, SO.sub.2 --, --COO--, --OOC--, --CONR--, --NRCO--, --SO.sub.2 NR--, and --NRSO.sub.2 --;
• or terminated at the R.sub.f end with --CONR-- or --SO.sub.2 NR--, that is the R.sub.f is attached to the carbon or sulfur atom;
• R is independently hydrogen, alkyl of 1 to 6 carbon atoms or hydroxyalkyl of 2 to 6 carbon atoms;
• m and n are independently 0 or 1;
• --[M.sub.1 ]-- represents a non-ionic hydrophilic monomer unit;
• --[M.sub.2 ]-- represents an anionic-hydrophilic monomer unit;
• and
• x and y represent the number of monomer units present in the co-oligomers and are both greater than 0;
• the sum of x and y being between 5 and 200, and y/(x+y) being between 0.01 and 0.98;
• and
• (b) an effective amount of an anionic polysaccharide.