| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fluorene-based polyester oligomer excellent in the reactivity and flowability and a manufacturing method thereof. <P>SOLUTION: The fluorene-based polyester oligomer is such a fluorene-based polyester oligomer that a polyester-based resin containing a fluorene with a skeleton of 9, 9-bis(hydroxyaryl)fluorene is depolymerized with a depolymerizing agent. The above fluorene-based polyester oligomer may have a weight-average molecular weight of the order of 5,000-30,000. The above fluorene-based polyester oligomer may have an acid value of the order of 0-100 mgKOH/g or may have an hydroxy value of the order of 5-400 mgKOH/g. The above fluorene-based polyester oligomer is excellent in the affinity to resins and is useful as various kinds of optical materials. <P>COPYRIGHT: (C)2009,JPO&INPIT |
