Patent Number: 6,333,367

Title: Cationic electrodeposition coating composition

Abstract: A cationic electrodeposition coating composition containing (A) an acrylicresin obtained by subjecting a mixture of 10 to 60% by weight of ahydroxyl group-containing acrylic monomer (a), 5 to 35% by weight of anamino group-containing acrylic monomer (b), 5 to 55% by weight of anaromatic vinyl monomer (c) and optionally another acrylic monomer (d) to aradical copolymerization reaction; (B) a hydroxyl group-containing acrylicresin-modified epoxy resin obtained by reacting 65 to 95% by weight of aresin composition consisting of 10 to 90% by weight of an epoxy resin (e)and 90 to 10% by weight of a hydroxyl group-containing acrylic resin (f)with 5 to 35% by weight of an amine compound (g); (C) a aliphatic and/oralicyclic blocked polyisocyanate compound, and (D) a bismuth compoundcomponent, a mixing ratio of the components (A), (B) and (C) being suchthat the component (A) is in the range of 40 to 90% by weight, thecomponent (B) is in the range of 5 to 55% by weight and the component (C)is in the range of 5 to 40% by weight based on a total weight of solidcontents in the components (A), (B) and (C), the component (D) beingcontained in such an amount as to be in the range of 0.01 to 10 parts byweight as a bismuth content per 100 parts by weight of a resin solidcontent in the electrodeposition coating composition.

Inventors: Kato; Akiko (Kanagawa-ken, JP), Nishiguchi; Shigeo (Kanagawa-ken, JP), Nishida; Reijiro (Kanagawa-ken, JP), Miyatake; Shinji (Kanagawa-ken, JP), Haneishi; Hidehiko (Kanagawa-ken, JP)

Assignee:

International Classification: C08G 18/00 (20060101); C08G 18/80 (20060101); C08G 18/40 (20060101); C09D 5/44 (20060101); C08K 003/20 (); C08L 063/02 ()

Expiration Date: 12/25/2014