Patent ID: 8026320
Filing Date: 2011-09-27
Classification: C08G,C08L,C09D,Y10T

Abstract:
1. A cationic electrodeposition coating composition comprising: amino group-containing modified epoxy resin (A), phenolic hydroxy group-containing resin (B), and blocked polyisocyanate curing agent (C), said phenolic hydroxy group-containing resin (B) being obtainable by reacting diepoxy compound (b11) and/or epoxy resin (b12) having an epoxy equivalent of 170 to 500 with bisphenol compound (b13) at an equivalent ratio of [epoxy groups in said diepoxy compound (b11) and epoxy resin (b12)]/[phenol groups in said bisphenol compound (b13)]=0.5 to 0.85, wherein R 1 is the same or different, and each represents a hydrogen atom or C 1-6 alkyl group; and m and n, which represent the number of repeating units of a portion having an alkylene oxide structure, are integers where m+n=1 to 20, and/or compound (2) represented by Formula (2), wherein R 2 is the same or different, and each represents a hydrogen atom or C 1-6 alkyl group; X represents an integer of 1 to 9; and Y represents an integer of 1 to 50.