| abstract |
As mordant for mordanting diffusing anionic dyes in image receiving layers of photographic dye diffusion materials the invention makes use of addition polymers having at least 10 mole % of recurring structural units of formula I <IMAGE> I in which Q represents nitrogen or phosphorus; R1, R2, R3 each represents a carbocyclic or alkyl group or two of these substituents complete a 5- or 6-membered heterocyclic ring R4 represents hydrogen or alkyl, X(-) is an anion. |