Patent ID: 11959188
Assignee: KANSAI PAINT CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 10:
11. A coating method for a cationic electrodeposition coating material, wherein a metallic article to be coated is coated by cationic electrodeposition, the method comprising:
a step of immersing the metallic article to be coated in a first solution bath; and
a step of immersing the metallic article to be coated in a second solution bath,
wherein a coating film formed through the two steps contains at least a base resin component (A), a reaction component (B) and a catalyst (C),
wherein the first solution bath contains at least one of the base resin component (A) and the reaction component (B) out of the base resin component (A), the reaction component (B) and the catalyst (C) and the second solution bath contains the other of the base resin component (A) and the reaction component (B), or at least one of the first solution bath and the second solution bath contains at least the base resin component (A) and the reaction component (B) out of the base resin component (A), the reaction component (B) and the catalyst (C), and
neither the first solution bath nor the second solution bath contains all of the three components at the same time,
wherein the combination of the base resin component (A), the reaction component (B) and the catalyst (C) is respectively a Michael addition reaction acceptor component, a Michael addition reaction donor component and a Michael addition reaction catalyst: or the Michael addition reaction donor component, the Michael addition reaction acceptor component and the Michael addition reaction catalyst,
wherein the Michael addition reaction acceptor component is an α,β-unsaturated carbonyl group-containing compound, and the Michael addition reaction donor component is an active hydrogen group-containing compound, and
wherein a step in which the base resin component (A) is contained and a step in which the reaction component (B) is contained out of the two steps include a cationic electrodeposition coating in which a current is applied.