| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a polycarbonate-polyorganosiloxane copolymer excellent in transparency.SOLUTION: There is provided a method for manufacturing a polycarbonate-polyorganosiloxane copolymer by introducing a polycarbonate oligomer, an alkali solution of bivalent phenol and polyorganosiloxane into a polycondensation reaction band and subjecting them to a polycondensation reaction in the polycondensation reaction band, having a process (1) for supplying an organic solvent to polyorganosiloxane to prepare a polyorganosiloxane solution before introducing them into the polycondensation reaction band, conducting the supply of the organic solvent in the process (1) at several stages and reducing the concentration of the polyorganosiloxane solution gradually.SELECTED DRAWING: None |
