| 摘要 |
PURPOSE:To provide a water-based coating compsn. which has a high coating efficiency, forms a strongly adhesive and highly corrosion resistant coating film and can be electrodeposited in a thick film, prepared by dissolving or dispersing specified water-based resin and finely powdered resin in an aqueous medium. CONSTITUTION:45-98wt% water-based resin which has primary, secondary or tertiary amino group with an N atom equivalent of 40-200, a water tolerance of 4 or higher and a molecular weight of 500 to 30,000, with 1wt% solution showing a surface tension of 51 dyne/cm or higher Ce.g. polyethyleneimine resin), 55-2wt% resin in fine powder having a melting point of 40 deg.C or higher (e.g. polyester resin) and, when necessary, pigments and additives such as modifying agent, dispersant and surface conditioner, are dissolved or dispersed in an aqueous medium.
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