| 摘要 |
<p>PURPOSE:To obtain a cationic electrodeposition coating resin composition which provides film having good throwing power, smoothness, corrosion resistance, and enables to form cathodically electrodepositable water solution using acid neutralization by inclusion of specific film former components. CONSTITUTION:In the following composition, (A), (B) and (C) represent: (A); Epoxy resin with average molecular weight 150-6000, epoxy eq. 75-3000, and having two or more of epoxy gp. in a molecule, or amine additive of the epoxy resin with primary or secondary amine, (B); Amino terminated condensate provided by maleinized aliphatic acid and polyamine having one or more of primary amino gp., both being dehydrated to reach an acid value less than 5 by refluxing in aromatic hyrocarbon solvent, (C); Partially blocked polyisocyanate compound having one or more, in average, of blocked isocyanate gp. and 0-1.5 free isocyanate gp. in a molecule. Reaction product of (A) and (B) is reacted with (C), and the formed product is contained in the object coating composition as film forming ingredient.</p> |
