PROCESS FOR THE PREPARATION OF BINDERS FOR PIGMENT PASTES FOR WATER DILUTABLE PAINTS

摘要

The invention is directed to a process for the production of cationic binders for pigment pastes for water-dilutable paints, particularly for cathodic electrodeposition based on low molecular oxazolidine group carrying modified epoxy compounds, and to the pastes obtained. The process is characterized in that preferably aliphatic di- or polyepoxy compounds are reacted with primary mono- and/or diamines and optionally monocarboxy compounds and that oxazolidine groups are introduced into the molecule by reaction with carbonyl compounds. The products show extremely high pigment loading capacity and an excellent performance in cathodically depositable electrodeposition paints. The products permit formation of low solvent paint systems.