| US 7,510,612 B2 | ||
| Chemical conversion coating agent and surface-treated metal | ||
| Masahiko Matsukawa, Nishitokyo (Japan); Kazuhiro Makino, Yokohama (Japan); and Toshiaki Shimakura, Ichikawa (Japan) | ||
| Assigned to Nippon Paint Co., Ltd., Kita-ku, Osaka (Japan) | ||
| Filed on Dec. 23, 2003, as Appl. No. 10/743,386. | ||
| Claims priority of application No. 2002-372769 (JP), filed on Dec. 24, 2002; application No. 2002-372770 (JP), filed on Dec. 24, 2002; and application No. 2003-403692 (JP), filed on Dec. 02, 2003. | ||
| Prior Publication US 2004/0163735 A1, Aug. 26, 2004 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. C23C 22/34 (2006.01); C23C 22/80 (2006.01); C23C 22/50 (2006.01); C23C 22/56 (2006.01) | ||
| U.S. Cl. 148—247 [148/243; 148/274; 106/14.05; 106/14.11; 106/14.15; 106/14.41; 106/14.42; 106/14.44] | 12 Claims |
| 1. A chemical conversion coating agent comprising:
at least one kind selected from the group consisting of zirconium, titanium and hafnium;
fluorine; and
a water-soluble resin,
wherein said water-soluble resin is a polyallylamine which is a homopolymer having a constituent unit expressed by the chemical
formula (2):
 and
wherein the water-soluble resin is a polyallylamine resin.
|