Patent ID: 6388041
Filing Date: 2002-05-14
Classification: C08G,C08L

Abstract:
A Process for producing a polyoxyethylene derivative of the formula (I) whereinAâ€² and Bâ€² each independently represent an organosilyl type amino-protecting group, or represent organosilyl type amino-protecting groups capable of combining with the nitrogen atom adjacent thereto to form a four- to seven-membered disila-azacyclo heterocyclic ring, Y represents a hydrogen atom, an alkali metal, or an organic group which, when Y is an alkali metal, can be introduced by replacing the alkali metal therewith according to a suitable reaction, R represents a hydrogen atom or a C1-6 alkyl group, n is an integer of 1 to 20,000, and m is an integer of other than 0 up to 20,000, the process comprising the steps of polymerizing ethylene oxide in a suitable organic solvent in the presence of a living polymerization initiator of the formula (II) wherein Aâ€² and Bâ€² have the same meanings as defined for formula (I), and M represents an alkali metal; if necessary, further polymerizing the resulting product with a cyclic diester of the formula (III) wherein each R independently represents a hydrogen atom or a C1-6 alkyl group; and, if necessary, reacting the resulting product with a compound having an organic group which, when Y is an alkali metal, can be introduced by replacing the alkali metal therewith.