Patent ID: 6410647
Filing Date: 2002-06-25
Classification: C08L,C09D

Abstract:
A clear coating composition comprising, as a binder component, a curable resin composition comprising:(a) 10 to 70% by weight of an acrylic polycarboxylic acid having 2 or more carboxyl groups per molecule on an average, an acid value of 5 to 300 mg KOH/g (solid) and a number-average molecular weight of 500 to 8000 obtained by copolymerizing an acid anhydride group-containing ethylenically unsaturated monomer with an ethylenically unsaturated mononer having no acid anhydride group and then reacting the resulting copolymer with a monoalcohol; (b) 5 to 70% by weight of a polyester polycarboxylic acid having an acid value of 50 to 350 mg KOH/g (solid), a number-average molecular weight of 400 to 3500 and a ratio of weight-average molecular weight to number-average molecular weight of 1.8 or less, which is obtained by reacting a polyester polyol having 3 or more hydroxyl groups with an acid anhydride group-containing compound; and (c) 10 to 80% by weight of a polyepoxide with both an epoxy group and a hydroxyl group, having an epoxy equivalent of 50 to 700 and a number-average molecular weight of 200 to 10000; provided that the amounts of the components (a) to (c) are based on the weight of the total solid contained in the curable resin composition; and further comprising (d) crosslinked resin particles prepared in the presence of an amphoteric ionic group-containing polyester resin.