| abstract |
PROBLEM TO BE SOLVED: To provide an aqueous electrodeposition coating material capable of forming a coating film excellent in all of heat resistance, insulation, safety, moisture resistance and edge covering properties. A resin containing 5 to 80 parts by weight of polyimide particles and 15 to 80 parts by weight of a hydrophilic cationic polymer, and preferably further containing 5 to 80 parts by weight of an organic solvent solution of polyimide and / or a prepolymer thereof in terms of solid content. The composition, an acid neutralizing agent such as an organic acid or an inorganic acid, and water are mixed to produce an aqueous electrodeposition coating material. By electrodeposition coating using this water-based electrodeposition paint, it is possible to form a coating film 13 having excellent heat resistance, insulation, moisture resistance and edge covering properties on the metal surface such as the flat wiring 10. it can. [Selection] Figure 2 |