Method for the continuous preparation of aromatic polycarbonate having a high molecular weight with static mixer and plug flow
AssigneeGeneral Electric Company
InventorsHendricus H. Maria van Hout, Martin H. Oyevaar, Bert J. Held
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Abstract
The invention relates to a method of preparing aromatic polycarbonate having a high molecular weight by boundary face condensation of carbonate oligomer in the presence of an aromatic monohydroxy compound as a chain stopper, base, water and organic solvent at a temperature of at most 70.degree. C., in which the components, among which the chain stopper, are mixed in static mixers to form a fine dispersion, reacting these in a residence zone with plug flow and repeating these steps at least once.
Claims7
A method for the continuous preparation of aromatic polycarbonate having a high molecular weight by boundary face condensation of carbonate oligomer with catalyst in the presence of an aromatic monohydroxy compound as a chain stopper, base, water and organic solvent at a temperature of at most 70.degree. C., comprising polycondensing is carried out by mixing components, in static mixers to form a fine dispersion and reacting the dispersion in a residence zone with plug flow and repeating this combination of steps at least once.
Dependencies are inferred from the claim text.