Emulsions according to claim 1 wherein the cationic nitrogenized emulsifying agent present in the emulsion consists of at least one cationic nitrogenized emulsifying agent selected from the group consisting of the fatty monoamines of the formula R6 --NH2, wherein R6 is a fatty hydrocarbon radical and an alkyl or alkenyl radical from C8 to C22 and the polyamines or amidopolyamines of the formula R-