| 摘要 |
PROBLEM TO BE SOLVED: To provide a preparation method of a polycarbonate resin raw material for stably producing a polycarbonate resin excellent in transparency, hue, heat resistance, moldability and mechanical strength, and having excellent optical characteristics.SOLUTION: There is provided a production method of a polycarbonate resin using a dihydroxy compound and diester carbonate as raw material monomers and polycondensing the monomers by ester exchange reaction in the presence of an ester exchange catalyst, where the dihydroxy compound at least contains an aliphatic dihydroxy compound having an ethereal oxygen atom at least at one &bgr;-position or γ-position of the hydroxy group, and the aliphatic dihydroxy compound contains alkanolamine, the method comprising a step of heating the aliphatic dihydroxy compound to 50°C or higher in advance, and mixing with diester carbonate in a molten state. |
