Cationic resin composition with reduced emissions during baking

摘要

A novel cationic electrodepositable resin which offers reduced bake off lose, reduced yellowing of topcoats and very smooth film is disclosed. The backbone resin contains the basic polyepoxy amine adduct but it is crosslinked with a diol modified methylene diphenyl diisocyanate (MDI) which is blocked with a mixture of various alcohols.