| abstract |
The present invention provides a source of metal ions, and a polyalkanolamine (II), at least one trialkanolamine of formula N (R 1 -OH) 3 (Ia) and / or at least one formula R 2 -N ( Dialkanolamines of R 1 -OH) 2 (Ib) wherein R 1 radicals are each independently selected from divalent straight or branched aliphatic hydrocarbon radicals of 2 to 6 carbon atoms, each R 2 radical is hydrogen And at least one leveling agent obtained by condensation of a straight or branched aliphatic, cycloaliphatic and aromatic hydrocarbon radical having 1 to 30 carbon atoms), or alkoxylation, substitution of said polyalkanolamine (II), Or to derivatives obtainable by alkoxylation and substitution. |