Patent ID: 8372257
Filing Date: 2013-02-12
Classification: C09D,C25D

Abstract:
1. A suspension electrodeposition coating composition comprising a block copolyimide having a siloxane bond in a molecular structure and an anionic group in a molecule as a resin component, the suspension electrodeposition coating composition, which comprises the block copolyimide, a basic compound, a water-soluble polar solvent, water and a poor solvent for the block copolyimide, wherein the concentration of the block copolyimide to the total composition is 1-15 wt %, the content ratio of the water-soluble polar solvent to the total composition is 25-60 wt %, the content ratio of water to the total composition is 10-30 wt %, the content ratio of the poor solvent to the total composition is 10-40 wt %, and the content ratio of the basic compound is 30-200 wt % to the stoichiometric amount necessary to neutralize an acid group in the block copolyimide, and wherein the block copolyimide dispersed in the suspension has an average particle size of 0.5-5 μm with a standard deviation of 0.1-8 μm.