JPS5471123A - Water-solubilized coating composition - Google Patents

Abstract

PURPOSE: To provide a coating composition capable of low-temperature cure, easy water-solubilization, and for use in anode-depositing type electrodeposition coating of good film characteristics, comprising two sorts of resins each consisting of an acid group-contg. high polymer component with unsaturated group, to which different kind of diamine is bonded.

CONSTITUTION: The objective composition comprising (1) 10W90 parts by wt. of a resin composed of (A) highly-polymerized main chain component [a] of a molecular weight of 500W10,000, of an iodine value of 100W500, with C=C bond, to which (B) a basic group [b] with a content of 0.02W0.4 mole in 100g of the resin (1), of formula I (R₁ is H or CH₃; R₂ and R₃ are each 1W20C organic residue; X is H, etc.) before solubilization, is bonded, and (2) 90W10 parts by wt. of another resin composed of (C) the same kind of a main chain component [c] as that of the [a] to which (D) are bonded both basic group [d] and acid group [e] with contents of 0.01W0.1 mole and 0.02W0.4 mole in 100g of the resin (2) and of formulae II and III (R₄ is H or CH₃; R₅, R₆ and R₇ are each 1W20C organic residue; Y is H, etc.) before solubilization, respectively. Furthermore, this composition is in a state neutralized with acid, also being brought to a solubilized state.

COPYRIGHT: (C)1979,JPO&Japio