公开(公告)号：US20180133755A1

公开(公告)日：2018-05-17

申请号：US15809091

申请日：2017-11-10

申请人： KANSAI PAINT CO., LTD. ,  HONDA MOTOR CO., LTD.

发明人： Ryusuke MURAMOTO ,  Hiroshi KITAGAWA ,  Yusuke KURATA ,  Takeshi OGAWA

IPC分类号： B05D7/00 ,  B05D3/00

CPC分类号： B05D7/57 ,  B05D1/04 ,  B05D3/007 ,  B05D3/0254 ,  B05D7/572 ,  B05D2451/00 ,  B05D2502/00 ,  B05D2503/00 ,  B05D2508/00 ,  B05D2518/00 ,  C09D1/00 ,  B05D2401/20 ,  B05D2401/40

摘要： A method for forming a multilayer coating film includes applying an aqueous first base coating composition (A) onto a cured electrodeposition coating film, applying an aqueous second base coating composition (B) without preheating, performing preheating, further applying a clear coating composition (C), and simultaneously heat-curing the first base coating film, the second base coating film, and the clear coating film. The aqueous first base coating composition contains a specific aqueous polyester resin, a specific aqueous acrylic resin, a specific aqueous urethane resin and a melamine resin. A breaking energy of a coating film formed of the aqueous first base coating composition and a peel strength between the coating film and the cured electrodeposition coating film are controlled to specific values.