Abstract: A coating material having excellent adhesion to the surfaces of substrates including metals and excellent flexibility, durability, chemical-resistance and rust-preventive property which comprises water, a water-soluble organic solvent and a water-soluble, thermosetting resin as substantial film-forming component, said resin being obtained by (A) adding an amine to 100 parts by weight of a copolymer consisting of (1) 50 to 80.5 parts by weight of at least one polymerizable, unsaturated monomer free from hydroxyl group, (2) a total of 19.5 to 50 parts by weight of an .alpha.,.beta.-ethylenically unsaturated acid and an epoxy resin having at least two epoxy groups in the molecule, the proportion of said epoxy resin being 0.01 to 0.5 equivalent with respect to the carboxyl group contained in said .alpha.,.beta.-ethylenically unsaturated acid, said .alpha.,.beta.

Abstract: This invention relates to a technique for improving the properties of the so-called methyl methacrylate lacquers prepared from polymers containing methyl methacrylate as a main monomer.That is, a liquid coating composition, which contains as a main component a polymer obtained by polymerization of methyl methacrylate alone or of a monomer mixture comprising 60 - 98 % by weight of methyl methacrylate and 2 - 40 % by weight of other monomer copolymerizable therewith, is ordinarily called as a methyl methacrylate lacquer.