Method for preparation of macrocyclic poly(alkylene dicarboxylate) oligomers from bis(hydroxyalkyl) dicarboxylates

摘要

Macrocyclic poly(alkylene dicarboxylate) oligomers are prepared in high yield by the reaction of a dicarboxylic acid chloride such as terephthaloyl chloride with at least one bis(hydroxyalkyl) ester such as bis(4-hydroxybutyl) terephthalate, in the presence of a highly unhindered amine or a mixture thereof with at least one other tertiary amine such as triethylamine, in a substantially inert organic solvent such as methylene, chlorobenzene or a mixture thereof. The concentration of the reagents in the reaction mixture are at least 0.08M.