CONTINUOUS PROCESS FOR MAKING POLYBUTYLENE TEREPHTHALATE USING PURIFIED TEREPHTHALIC ACID AND 1,4-BUTANE DIOL

摘要

Disclosed is a continuous process and device for making polybutylene terephthalate (PBT) resin, particularly high molecular weight PBT resin. Also disclosed are a device for conducting the process, and a monitoring process for determining the carboxylic acid end group concentration of the resulting PBT.