Patent ID: 6730203
Filing Date: 2004-05-04
Classification: B05D,C08G,C09D,Y10T

Abstract:
A multi-layer coating film-forming method which comprises coating a cationic electrodeposition coating composition (A) containing a blocked polyisocyanate compound as a crosslinking agent and bismuth hydroxide to form a non-cured electrodeposition coating film, coating a water based intercoat coating composition (B1) containing a hydroxyl group and carboxyl group-containing base resin, a blocked polyisocyanate crosslinking agent, a fine aluminum powder and a titanium oxide white pigment onto the non-cured electrodeposition coating film to form a non-cured intercoat coating film, followed by heat curing both coating films simultaneously, the fine aluminum powder being contained in the range of 0.1 to 30 parts by weight, and the titanium oxide white pigment being contained in the range of 1 to 200 parts by weight per 100 carts by weight of a total amount of the hydroxyl group and carboxyl group-containing base resin and the crosslinking agent respectively.