METHOD OF MANUFACTURING POLYCARBONATE RESIN

PROBLEM TO BE SOLVED: To provide a method of manufacturing a polycarbonate resin capable of preventing or reducing a yellow discoloration of the polycarbonate resin generated at a temperature of 200°C or 320°C during a melting polymerization process, and easily removing byproducts such as phenol eve...

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Bibliographische Detailangaben
Hauptverfasser:	BAE JIN YONG, LIM HO SUB, CHOI KYU BUEM, JANG BOK NAM, SONG SU JEONG
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method of manufacturing a polycarbonate resin capable of preventing or reducing a yellow discoloration of the polycarbonate resin generated at a temperature of 200°C or 320°C during a melting polymerization process, and easily removing byproducts such as phenol even under a polymerization condition at 280°C or less.SOLUTION: The method of manufacturing a polycarbonate resin includes manufacturing a prepolymer (prepolymerization body) of polycarbonate by polymerizing an aromatic dihydroxy compound and diaryl carbonate, injecting an inert gas to the manufactured prepolymer (prepolymerization body) of polycarbonate and mixing the gas therewith, and foaming and polymerizing the prepolymer (prepolymerization body) of polycarbonate mixed with the inert gas. The method of manufacturing the polycarbonate resin can prevent or reduce a yellow discoloration of the polycarbonate resin generated during a melting polymerization of the polycarbonate resin.