| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an aqueous dispersion reduced in environmental load, and excellent in long-term storage stability and water resistance, and adhesivity when used as a coating film. <P>SOLUTION: The aqueous dispersion is a polyester copolymer having as a main chain a polyester polymer containing an acid component and an alcohol component, and is an aqueous dispersion in which a polyester copolymer having a compound having one carboxyl group and one acid anhydride group incorporated at a terminal is dispersed in an aqueous medium, wherein an acid value of the polyester copolymer is≥15 mgKOH/g; a number-average molecular weight is 7,000 to 90,000; a copolymerization proportion of an aromatic dicarboxylic acid component having a sulfonate salt group in the polyester copolymer is <1 mol%; and no surfactant is substantially contained. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
