Crystalline polyester resin aqueous dispersion, coating composition, coating film, and metal can

Abstract

A crystalline polyester resin aqueous dispersion contains substantially no curing agent and is therefore free from harmful substances such as bisphenol A and formaldehyde. The crystalline polyester resin therein exhibits excellent solvent solubility and is able to be formed into an aqueous dispersion with a relatively small usage of an organic solvent. The crystalline polyester resin aqueous dispersion contains a crystalline polyester resin (A) described below. Crystalline polyester resin (A): the crystalline polyester resin containing a polycarboxylic acid component and a polyalcohol component as copolymerization components, wherein the crystalline polyester resin contains 75 mol % or more of terephthalic acid as the polycarboxylic acid component, and 55 mol % or more of 1,6-hexanediol as the polyalcohol component, wherein the crystalline polyester resin has an acid value of 180 eq/ton or more, and wherein the crystalline polyester resin has a melting point of 120 to 160° C.

Dependencies are inferred from the claim text.