METAL SURFACE TREATMENT COMPOSITION CONTAINING ACRYLIC RESIN, METHOD FOR TREATMENT, AND TREATED METAL MATERIALS

摘要

A metal surface treatment composition which can improve the corrosion resistance and the tight adhesion to coating films and impart slipperiness. The composition is an aqueous solution, dispersion or emulsion characterized by containing both an acrylic resin having amino and/or ammonium groups, hydroxyl groups and hydrophobic groups and a heavy metal or a salt thereof. The amino or ammonium groups have at least one structure selected from among those represented by general formulae (I) (wherein R1, R2: hydrogen, hydroxyl, substituted or unsubstituted, linear or branched C1-C5 alkyl, or substituted or unsubstituted, linear or branched C1-C5 hydroxyalkyl) and (II) (wherein R3, R4, R5: hydrogen, hydroxyl, substituted or unsubstituted, linear or branched C1-C5 alkyl, or substituted or unsubstituted, linear or branched C1-C5 hydroxyalkyl).