or different, A is a divalent organic linking group which can contain a fluoroaliphatic radical, Rf, with the proviso that at least one R or A contain Rf, each A being the same or different, Z is an organ amine nitrogen-derived cationic moiety, Y is an anionic species, x is 1 to 20, z is zero or 1 and p is 1 to 3. 4.