Use of polyolefins with basic aromatic substituents as auxiliaries for the electrolytic deposition of metallic layers

The invention relates to the use of polyolefins with alkaline, aromatic substituents of the general formula (I), wherein Ar is an alkaline aryl group or a phenyl, an alkyl having 1 to 8 carbon atoms or hydrogen, with at least 50 % of the groups representing an alkaline aryl group and n being an integer of from 2 to 3000, as additive in electrolytic baths. The invention further relates to electrolytic baths containing said polyolefins and to a method for electrolytically depositing metal layers.