Condensation products based on substituted propyleneureas, their preparation and use

摘要

The invention relates to condensation products based on substituted ureas, their preparation and their use. These condensation products each contain at least two cyclic urea units and can be prepared either by reacting primary diamines or polyamines with ureas and subsequently reacting the products with predominantly C-H-acidic aldehydes or by reacting primary amines with isocyanates and subsequently reacting the products with predominantly C-H-acidic aldehydes in the presence of acidic catalysts. These condensation products are suitable for the preparation of heat-curable coating compositions and for the preparation of binders for cathodic electrodeposition coating.