Patent ID: 8097665
Filing Date: 2012-01-17
Classification: C09D,C25D

Abstract:
1. A cationic electrodeposition coating composition comprising amino group-containing modified epoxy resin (A), blocked polyisocyanate curing agent (B), metal compound (C), and nitrogen oxide ion (E); the cationic electrodeposition coating composition comprising the metal compound (C) in an amount of 10 to 10,000 ppm calculated as metal (on a metal mass basis), and the nitrogen oxide ion (E) in an amount of 50 to 10,000 ppm, relative to the mass of the cationic electrodeposition coating composition, the amino group-containing modified epoxy resin (A) being a resin obtained by reacting modified epoxy resin (A1) having an epoxy equivalent of 500 to 2,500 and amine compound (A2), the modified epoxy resin (A1) being obtained by reacting diepoxy compound (a1), epoxy resin (a2) having an epoxy equivalent of 170 to 500, and bisphenol compound (a3), the diepoxy compound (a1) being compound (1) represented by Formula (1) below, wherein R 1 is the same or different, and each represents a hydrogen atom or a C 1-6 alkyl group; R and/or compound (2) represented by Formula (2) below, wherein R 3 represents a hydrogen atom or C 1-6 alkyl group, X is an integer of 1 to 9, and Y is an integer of 1 to 50; when Y is 2 or more, each R 3 in the repeating unit is the same or different, and the metal compound (C) being a compound of at least one metal (c) selected from the group consisting of zirconium, titanium, cobalt, vanadium, tungsten, molybdenum, copper, indium, zinc, aluminum, bismuth, yttrium, lanthanoid metals, alkali metals, and alkaline earth metals.