Method of electrodepositing self-crosslinking cationic compositions

In a method of electrocoating an electrically-conductive surface serving as a cathode which comprises passing electric current between said cathode and an anode in contact with an aqueous electrodepositable composition,

• the improvement wherein said electrodepositable composition comprises:
• A. an acid-solubilized, self-curing synthetic organic resin containing amino groups, hydroxyl groups, and blocked isocyanate groups, wherein said blocked isocyanate groups are stable at room temperature in the presence of hydroxyl or amino groups and are reactive with hydroxyl groups or amino groups at elevated temperatures, and wherein said organic resin is derived from the reaction product of,
• 1. an epoxy group-containing organic compound,
• 2. a primary or secondary amine, and
• 3. a partially-blocked organic polyisocyanate.