Polyadduct/polycondensate containing basic nitrogen groups, its preparation and its use

A polyadduct/polycondensate which is water-dilutable when protonated with an acid, which polyadduct/polycondensate is suitable for the cathodic electrocoating of metallic articles and which contains basic nitrogen groups, the groups being of the formula (I) ##STR13## and/or of the formula (II) ##STR14## and which additionally contains groups of the formula (III) ##STR15## in which formulae R.sup.1 and R.sup.2 are identical or different and each is hydrogen or methyl, R.sup.3 and R.sup.4 are identical or different and each is hydrogen, alkyl of 1 to 13 carbon atoms or a methylene, isopropylidene, --O--, ##STR16## bonded to a phenol or a phenol-ether, R.sup.5 and R.sup.6 are identical or different and each is alkyl of 1 to 10 carbon atoms or hydroxyalkyl or alkoxyalkyl of 2 to 10 carbon atoms, or R.sup.5 and R.sup.6 are links to form a 5-membered or 6-membered ring, R.sup.7 is a polydienyl radical, n.sup.1 is from 0.5 to 3 and n.sup.2 is from 0.05 to 1.0.