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AssigneeGeneral Electric Company
InventorsHugo Ingelbrecht, Alexey Kruglov, Gert-Jan Schoenmakers
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A method for preparing a poly(arylene ether) with a reduced level of powder fines is described. In one embodiment, the method comprises oxidatively coupling a monohydric phenol in the presence of a solvent and a complex metal catalyst, to produce a poly(arylene ether) resin; and then removing a portion of the solvent to produce a concentrated solution having a cloud point Tcloud. The concentrated solution is then combined with an anti-solvent to precipitate the poly(arylene ether) in the form of a precipitation mixture. The concentrated solution usually has a temperature of at least about (Tcloud−10° C.) immediately before it is combined with the anti-solvent. The precipitation mixture has a temperature of at least about (Tcloud−40° C.) after its formation. Related poly(arylene ether) copolymers are also described.
A method for preparing a poly(arylene other), comprising the following steps:
The method of claim is, wherein the nitrogen-containing ligand is selected from the group consisting of alkylenediamine ligands, primary monoamines, secondary monoamines, tertiary monoamines, aminoalcohols, oxines, and combinations comprising at least one of the foregoing nitrogen-containing ligands.
A method for preparing a poly(arylene ether), comprising the following steps:
A method for preparing a poly(arylene ether), comprising the following steps:
A poly(arylene ether) copolymer powder, comprising 2,6-dimethyl-1,4-phenylene ether units and 2,3,6-trimethyl-1,4-phenylene ether units, having an intrinsic viscosity of about 0.25 dL/g to about 0.50 dL/g, and containing less than about 18% by weight of particles smaller than about 38 micrometers.
Dependencies are inferred from the claim text.