| abstract |
(57) [Problem] To provide an aqueous coating composition capable of forming a coating film having high water repellency and waterproofness without lowering weather resistance, stain resistance and initial drying property. (A) (A) 50 to 98% by weight of a (meth) acrylic acid ester having an alkyl group having 4 or more carbon atoms, (b) 2 to 10% by weight of a carbonyl group-containing monomer, and (c) ) Other polymerizable unsaturated monomers from 0 to 4 An aqueous dispersion of a copolymer obtained by emulsion polymerization of a monomer mixture containing 8% by weight, (B) and (d) specific structural formulas (I) and (I) 3 to 70% by weight of at least one monomer selected from the monomers represented by I), (e) 1 to 40% by weight of an alkoxysilyl group-containing monomer, (f) carboxyl group, sulfonic acid group and amino group 1 to 25% by weight of a polymerizable unsaturated monomer having one type of functional group selected from the group of groups, and (g) 0 to 25% of other polymerizable unsaturated monomers. 95 wt% including monomers - including mixture obtained by copolymerizing a copolymer solution or aqueous dispersion, and (C) hydrazine derivative having at least two -NH-NH 2 containing groups per molecule. |