Patent ID: 6815483
Filing Date: 2004-11-09
Classification: C08G,C08L

Abstract:
A method for preparing at least one hydroxy-terminated oligomer of a polyether polymer which comprises:preparing a copolymer of a first polymer which is a polyethersulfone, polyetherketone, or polyetherimide and a second condensation polymer characterized by structural units containing an oxycarbonyl group, by contacting, wider reactive conditions, at least one salt of a dihydroxyaromatic compound with at least one substituted aromatic compound of the formula Z(A1â€”X1)2,â€ƒâ€ƒ(I) wherein Z is an activating radical, A1 is an aromatic radical and X1 is fluoro, chloro, bromo or nitro, in the presence of said second polymer; andcontacting said copolymer with aqueous alkali under reactive conditions, thus hydrolyzing the oxycarbonyl group.