Fremgangsmåde til fremstilling af polyethylen-2,6-naphthalendicarboxylatresin

摘要

A polyethylene-2,6-naphthalene dicarboxylate resin contains an antimony compound as a polycondensation catalyst, and has an intrinsic viscosity of 0.55 to 0.75 dl/g, a terminal carboxyl group content of 32 eq/ton or less, an acetaldehyde content of 8 ppm or less and a diethylene glycol component content of 0.8 to 3.0 wt%. A preform and a bottle made of the resin are also described.