| 摘要 |
PROBLEM TO BE SOLVED: To obtain a cationic electrodeposition coating material composition which permits omission of a step for forming an intermediate coating film and gives a cationic electrodeposition coating film excellent in rustproof property at an edge part and in weather resistance. SOLUTION: The cationic electrodeposition coating material composition comprises an epoxy resin (A) bearing a cationic group, an internally crosslinked fine resin particle (B) having a particle size of 0.01-0.2μm and an aqueous resin (C), and comprises a dispersion of an emulsion particle (R) comprising the epoxy resin (A), the internally crosslinked fine resin particle (B) and the aqueous resin (C), where the solubility parameterδa of the epoxy resin (A) and the solubility parameterδc of the aqueous resin (C) satisfy the relation:δa-δc≥1.0 and the internally crosslinked fine resin particle (B) is dispersed in an oil phase of the emulsion particle (R). COPYRIGHT: (C)2005,JPO&NCIPI
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