| abstract |
Crosslinking components for hydroxyl groups and / or secondary and / or primary amino group-containing lacquer binders, especially for cathodically depositable lacquers, which can be crosslinked by transesterification and / or transamidation and / or transurethaneization, have at least 0.5 transesterifiable groups of CH-activated esters and at least 0.5 blocked isocyanate groups. The crosslinking components are prepared by partial transesterification of a polyol, preferably a triol, with a CH-activated ester, preferably a malonic diester (derivative), and subsequent reaction with a partially blocked polyisocyanate. The products are superior to combinations that contain transesterification or re-urethanization crosslinkers alone or mixtures of these curing agents. |