| 摘要 |
A suspension type electrodeposition coating composition containing, as a resin component, block copolyimide having a siloxane bond in a molecular structure and an anionic group in a molecule. Preferably, the above-mentioned block copolyimide contains, as one of the diamine components, diamine having a siloxane, bond in a molecular structure. In addition, preferably, the above-mentioned anionic group is a carboxylic acid group or a salt thereof and/or a sulfonic acid group or a salt thereof. The electrodeposition coating composition has superior heat resistance, which does not easily develop peeling and cracks in the electrodeposited body, and is capable of efficiently forming a high-insulation electrodeposited film superior in the uniformity of film property.
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