Nippon Paint Compnay, Ltd.

Kazuo Morichika

Hiroyuki Sakamoto

Noriyuki Tsuboniwa

Ichiro Kawakami

Toshitaka Kawanami

Hiroyuki Nojiri

Motoki Fujii

Hidenori Tanaka

A cationic electrodeposition coating composition containing no heavy metal-based anticorrosive agents such as lead compounds, and which is capable of forming a coating film with a high corrosion resistance. The composition contains 0.5 to 20% by weight of a compound having an N-substitued benzoxazine ring represented by formula (1), relative to a resin solid matter, and an unsaturated hydrocarbon group-containing sulfide-modified epoxy resin as a base resin:wherein R is a hydrocarbon group having 1 to 8 carbon atoms.

Coating composition containing benzoxazine compound

It is an object of the present invention to provide a method of forming a coating film by which a coating film excellent in weathering resistance, light degradation resistance, smoothness and the like can be formed on the outer panel portion of an article to be coated such as a car, and a coating film excellent in rust prevention can be formed on the inner panel portion (bag-structured portion) of the article to be coated, with the interface between the outer and inner panel portions of the article being excellent in rust prevention and finish as well, and by which resources saving and coating cost reduction can be expected.

Method of forming coating films and coated article

Growing community of inventors

Takatsuki, Japan

Kazuo Morichika