| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polyester copolymer in which the adhesion to a substrate and bonding properties to other substrates, which conflict with each other, are improved at the same time while gelification is suppressed. <P>SOLUTION: The polyester copolymer includes a polyester polymer as a main chain that contains a polycarboxylic acid component and a glycol component, and a compound introduced at a terminal, the compound having one carboxyl group and one acid anhydride group, wherein an acid value is 15 mgKOH/g or more, and a number average molecular weight is 7,000-90,000. <P>COPYRIGHT: (C)2013,JPO&INPIT |
