| abstract |
The invention relates to a process for the preparation of dialkyl / aryl polyethylene glycols used as coordinating agents in chemical synthesis. The process according to the invention consists in that a β-alkyloxy- (β-alkyl polyethyleneoxy) -β-alkylphenyl polyethyleneoxy-propionic acid compound is esterified with an alcohol and / or alkylphenol type compound of the formula R (R) - OH at a temperature of 100-160 ° C in acid catalysis for 2-4 hours resulting in a product of the general formula R (R) -O- (CHCH-O) -CHCH-CO- O- (R) R wherein R and R represents an alkyl group of 8 to 20 carbon atoms, linear or branched, respectively, alkyl / alkylaryl mononuclear with 8 to 12 carbon atoms, is the degree of oligomerization and has values in the range 0 ... 18. |