CONTROLLED PARTIAL DEPOLYMERIZATION PROCESS FOR POLYTETRAMETHYLENE ETHER GLYCOL MOLECULAR WEIGHT DISTRIBUTION NARROWING

摘要

The present invention provides an improved process for preparing a narrow molecular weight distributed polytetramethylene ether glycol (PTMEG). The product polytetramethylene ether glycol has an increased number average molecular weight, a lowered polydispersity and a reduced molecular weight ratio when compared to the polytetramethylene ether glycol in the corresponding feedstock.