| abstract |
A cathode-precipitating electrodeposition coating having excellent low-temperature curability, said composition consisting essentially of (A) 100 parts by weight of a high molecular compound having a molecular weight of 500 to 10,000 and containing carbon-carbon double bonds with an iodine value of 50 to 500 and 30 to 300 millimoles of amino groups per 100 g, (B) 10 to 200 parts by weight of a product of reaction of a diglycidyl compound represented by the general formula <IMAGE> +TR <IMAGE> wherein R1, R2 and R3 represent a hydrogen atom or a methyl group and n represents an integer of from 0 to 20, with at least one organic acid component selected from the group consisting of (a) both an alpha,beta-unsaturated dicarboxylic acid and an alpha,beta-unsaturated monocarboxylic acid, (b) an unsaturated fatty acid containing at least 10% by weight of carbon-carbon conjugated double bonds and having a molecular weight of 100 to 350, and (c) an alpha,beta-unsaturated monocarboxylic acid, a 1,2-dicarboxylic acid anhydride, and a monoepoxy compound in this sequence, and (C) 0.005 to 1.0 part by weight as metal of a manganese salt of an organic acid or manganese dioxide. |