Method for preparing polyether copolymers with polycarbonates and polyarylates
AssigneeGeneral Electric Company
InventorTohru Takekoshi
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Abstract
Copolymers of polycarbonates or polyarylates with polyether polymers such as polyethersulfones, polyetherketones, and polyetherimides are prepared by reaction of the polyether polymer-forming reagents, e.g., bisphenol A disodium salt and bis(4-chlorophenyl) sulfone, in the presence of the polycarbonate or polyarylate. The reaction may take place in a dipolar aprotic solvent, or in a water-immiscible aromatic solvent in the presence of a phase transfer catalyst, preferably a hexaalkylguanidinium halide. Hydroxy-terminated polyether oligomers may be produced from the copolymers by saponification of carbonate or ester groups.
Claims19
A method for preparing a copolymer of a first polymer which is a polyetherimide and a second condensation polymer which is a polycarbonate, which comprises contacting, under reactive conditions, at least one salt of a dihydroxyaromatic compound with at least one substituted aromatic compound of the formula
- Z(A1—X1)2, (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.
A method for preparing a copolyetherimidecarbonate which comprises contacting, under reactive conditions, at least one alkali metal salt of bisphenol A with a bisimide selected from the group consisting of 1,3-bis[N-(4-chlorophthalimido)]benzene;
- 1,4-bis[N-(4-chlorophthalimido)]benzene;
- and 4,4′-bis[N-(4-chlorophthalimido)]phenyl ether, in solution in o-dichlorobenzene or anisole, in the presence of a polycarbonate and about 1-10 mole percent, based on said bisimide, of a hexaalkylguanidinium halide as phase transfer catalyst and at a temperature in the range of about 125-250° C.
Dependencies are inferred from the claim text.