Process for the production of activated polyethers

A method of preparing an activated polyether polyol by reacting an aminoalcohol selected from the group consisting of N-alkylaminoalcohol, N-arylaminoalcohol and dialcoholamine having 1 to 18 carbon atoms in the alkyl or aryl moiety with a polyether terminated by a good leaving group selected from the group consisting of a halide, a sulfonate and a nitrophenoxy group, at 50.degree. to 250.degree. C. which polyether polyol is activated by a resulting tertiary amine group.