Polyethylene glycol compounds and process for making

摘要

A substituted polyethylene glycol compound and process for making. The compound has the formula RO(C₂H₄O)_nH wherein R represents a C_1-7 hydrocarbon group and n represents the average number of moles of C₂H₄O groups, ranging from 500 to 2000. The compound has a ratio of weight average molecular weight to a number average molecular weight in the range of from 1 to 1.1. The compound contains less than ten weight percent polyethylene glycol. The gist of the process is the use of an aprotic polar solvent. When the aprotic polar solvent is a polyether solvent, then the n value of the compound ranges from 100 to 2000.