Title:
【発明の名称】マルチコート塗装系の最外クリヤ塗装の黄ばみを防止する方法
Document Type and Number:
Japanese Patent JP2630774
Kind Code:
B2
Abstract:
A method of preventing the yellowing of the outermost coating of a multicoat coating system is disclosed. The method comprises initially depositing onto a conductive substrate by cathodic electrodeposition a primer coating comprising at least one layer of an amine-epoxy resin adduct and a cross-linking agent, and then curing said primer to a hard, durable film. Then, depositing a second coating onto the primer layer comprising at least one layer of a pigmented film-forming basecoat. Then depositing a third outermost coating onto the second coating comprising at least one layer of a clear, film-forming topcoat, and then curing the basecoat and topcoat. The primer coating contains a cross-linking agent selected from the group consisting of aliphatic polyisocyanates containing at least six carbon atoms, the isocyanurates of aliphatic polyisocyanates containing at least six carbon atoms, aromatic polyisocyanates having a molecular weight greater than 174, and the isocyanurates of aromatic diisocyanates having a molecular weight greater than 174. The polyisocyanates or isocyanurates are blocked with a blocking agent.
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Inventors:
TAPAN KEI DEBUROI
DEIN YUU CHUN
DEIN YUU CHUN
Application Number:
JP16386087A
Publication Date:
July 16, 1997
Filing Date:
June 30, 1987
Export Citation:
Assignee:
BII EI ESU EFU CORP
International Classes:
B05D7/00; C09D5/44; C09D163/00; B05D1/36; C25D13/00; (IPC1-7): C25D13/00; B05D1/36; C09D5/44
Domestic Patent References:
| JP55127472A |
Attorney, Agent or Firm:
Akashi Masatake