FLAME-RETARDANT POLYCARBONATE RESIN COMPOSITION HAVING IMPROVED HEAT STABILITY AND METHOD FOR PREPAR

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The present invention refers to an aromatic dihydroxy compound with a diaryl carbonate as alkali, an alkaline-earth or a a combination of transesterification in the presence of a catalyst, consisting of the reaction product melt polycarbonate; represented by formula 1 a as a sulfonate acid ester compound; and halogen-based flame retardant in such a polycarbonate resin characterized by including to provides manufacturing method, the composition. [Formula 1] In formula said R 1 1 ∼ 20 carbon atoms substituted carbon or halogen hydrocarbon group of PAG 1 ∼ 20 can, R 2 12 ∼ 20 hydrocarbon group in the carbon atoms substituted carbon or halogen can hydrogen which a hydrocarbon 12 ∼ 20, the n is integer number of 0 ∼ 5.