Hydroxy-functional, co-polymerisable polyalkyl glycol macro-monomers, their manufacture and

摘要

A polyalkylene glycol monoester of alpha -beta -ethylenically unsaturated carboxylic acid is prepared by reacting in an alkoxylation reaction alpha ,beta -ethylenically unsaturated carboxylic acid or its reactive derivative with 2-4C-alkylene oxide in the presence of 10-10000 ppm, based on the weight of alpha -beta -ethylenically unsaturated carboxylic acid of 2,2,6,6-tetramethylpiperidine 1-oxyl or 4-hydroxy-2,2,6,6-tetramethylpiperidine 1-oxyl.