Patent ID: 8945711
Filing Date: 2015-02-03
Classification: C08J,C08L,C09D,Y10T

Abstract:
1. A water-based composite resin composition comprising: composite resin particles (A); a curing agent including any one of an amine having a cyclic structure and a polycarboxylic acid; and an aqueous medium (B), wherein: the composite resin particles (A) contain polyester resin (a1) particles having a sulfonate group, and an epoxy resin (a2), of which some or all parts are encapsulated in the polyester resin (a1) particles; the sulfonate group content is in the range of 0.2 mol/kg to 0.6 mol/kg relative to the total amount of the polyester resin (a1); the mass ratio (a1)/(a2) of the polyester resin (a1) to the epoxy resin (a2) in the composite resin particles (A) is in the range of 95/5 to 30/70; and the polyester resin (a1) particles are produced through a reaction of a polyol (a1-1) with an aromatic polycarboxylic acid (a1-2-1), including any one of 5-sodium sulfoisophthalic acid and an esterification product thereof.