POLYCARBONATE PREPARATION METHOD

Provided is a polycarbonate preparation method, comprising the following steps: a) mixing a phenoxide water aqueous solution of a bisphenol and/or a polyphenol with a phosgene and an inert organic solvent, reacting, and generating a polycarbonate oligomer; b) highly emulsifying the oligomer by reinf...

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Hauptverfasser: ZHANG, Hongke, ZHANG, Lei, FENG, Kai, HU, Yifeng, HUA, Weiqi, SONG, Linrong, ZANG, Xiwang
Format: Patent
Sprache:eng ; hun
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Zusammenfassung:Provided is a polycarbonate preparation method, comprising the following steps: a) mixing a phenoxide water aqueous solution of a bisphenol and/or a polyphenol with a phosgene and an inert organic solvent, reacting, and generating a polycarbonate oligomer; b) highly emulsifying the oligomer by reinforced micromixing to form a stable emulsion; and c) introducing the emulsion into a polycondensation reactor for a chain extending reaction, separating and finally obtaining the polycarbonate. Through the reinforced micromixing, the present method can prepare the high-molecular-weight polycarbonate without any catalysts, thus simplifying the post-treatment process of the product and improving product quality.