Process for the preparation of hydroxy-terminated polycarbonate polymers.

摘要

A method for preparing thermoplastic carbonate polymers terminated with hydroxy groups is disclosed, in which a dihydric phenol is reacted with a carbonyl halide in the presence of a monotetrahydropyranyl ether salt. The hydroxy-terminated polymer is then obtained by cleaving the tetrahydropyranyl group with oxalic acid or a hydrogen halide acid.