Aromatic polyether sulfone having hydroxyphenyl end group and method for producing the same

摘要

This invention is a method for producing an aromatic polyethersulfone (PES) having hydroxyphenyl end groups suitable as an alloying agent, comprising the step of heating an aromatic polyester sulfone obtained beforehand by polymerization and a dihydric phenol compound and/or water and a basic compound in an aprotic polar solvent. According to this method, a PES having reactive hydroxyphenyl end groups, which can be suitably finely dispersed into a matrix resin when a thermoplastic resin or thermosetting resin and the PES are alloyed with each other, can be produced efficiently in a short time by an economical and simple method.