| 摘要 |
The present inventions provide
a novel polycarbonate copolymer having high fluidity and high molecular weight which is formed of a structural unit derived from an aliphatic diol compound and a structural unit derived from an aromatic dihydroxy compound, having a structure represented by the formula (III):
having the content of the structural unit derived from the aliphatic diol compound of 1-30 mol%, having the Q-value (280°C, 160kg load) in the range from 0.02 to 1.0 ml/s, and having the weight average molecular weight (Mw) of 30,000 to 100,000,
an aromatic polycarbonate compound which is formed of a structural unit derived from an aromatic dihydroxy compound which is suitable for a prepolymer for producing a high fluidity polycarbonate copolymer and
an improved method for producing a highly polymerized aromatic polycarbonate resin which comprises reacting an aromatic polycarbonate with an aliphatic diol compound and removing cyclic carbonate produced as a by-product from the reaction system. |
