| abstract |
Compositions are described which are useful particularly in improving the electrodeposition of zinc from aqueous alkaline plating baths. In one embodiment, the new composition comprises a polymeric composition prepared by the process which comprises the steps of (A) preparing an intermediate by reacting (A-1) at least one nitrogen-containing heterocyclic compound with (A-2) an epihalohydrin, glycerolhalohydrin or mixtures thereof, and (B) reacting said intermediate with at least one amidine compound to form the desired polymeric composition. Aqueous alkaline zinc electroplating baths containing the compositions of the invention with or without cyanide present, deposit a bright and lustrous zinc coating on metal over a wide range of current densities. |