| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for recovering a high-purity cyclic polyphenylene ether ether ketone composition by a convenient method. <P>SOLUTION: In the method for recovering a cyclic polyphenylene ether ether ketone composition, the high-purity cyclic polyphenylene ether ether ketone composition is obtained only by subjecting a mixture including at least a polyphenylene ether ether ketone, a cyclic polyphenylene ether ether ketone, and an organic polar solvent to solid-liquid separation within a temperature range in which the polyphenylene ether ether ketone becomes insoluble, and removing the organic polar solvent from the obtained filtrate. <P>COPYRIGHT: (C)2013,JPO&INPIT |
