Patent ID: 8653232
Filing Date: 2014-02-18
Classification: C08G

Abstract:
1. A manufacturing method of polyethylene terephthalate including a step of carrying out melt polycondensation by using a compound represented by the following general formula (I) as a polycondensation catalyst to obtain melt polycondensed polyethylene terephthalate having an intrinsic viscosity of from 0.48 to 0.53 dL/g and a terminal carboxyl number of from 14 to 22 mmol/kg; and a step of further solid phase polycondensing the melt polycondensed polyethylene terephthalate to obtain solid phase polycondensed polyethylene terephthalate having an intrinsic viscosity of from 0.70 to 0.86 dL/g: wherein R