Cathode-depositing electrodeposition coating composition.

摘要

A cathode-precipitating electrodeposition coating having excellent low-temperature curability, said composition consisting essentially of
<UnorderedLists id="ula01" listStyle="none"><ListItem>(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,</ListItem><ListItem>(B) 10 to 200 parts by weight of a product of reaction of a diglycidyl compound represented by the general formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="23" wi="179" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R<Sub>1</Sub>, R<Sub>2</Sub> and R<Sub>3</Sub> represent a hydrogen atom or a methyl group and n represents an integerof 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</ListItem><ListItem>(C) 0.005 to 1.0 part by weight as metal of a manganese salt of an organic acid or manganese dioxide.</ListItem></UnorderedLists>