| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an essential recycling method for a polycarbonate waste resin in high energy efficiency by the use of a melt polycondensation apparatus. <P>SOLUTION: In a process of a polycondensation reaction of the polycarbonate waste resin and/or a polycarbonate oligomer in a transesterification polymerization apparatus, this recycling method for the polycarbonate resin comprises adjusting a hydroxy radical concentration of a polycarbonate polycondensation component contained in a transesterification reaction system. Furthermore, in a process of the transesterification and/or polycondensation reaction between the polycarbonate waste resin and the polycarbonate oligomer in which the polycarbonate waste resin is supplied in an optional part of a continuous melt polycondensation apparatus equipped with a plurality of linked polymerization tanks for use in the polycarbonate resin production, the recycling method for the polycarbonate resin comprises preliminarily adjusting the hydroxy radical concentration of a polycarbonate oligomer terminal to polycondense them. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
