| 摘要 |
The present invention is a polycarbonate-polyorganosiloxane copolymer (A-1) comprising a polycarbonate block composed of a specific structural unit and a polyorganosiloxane block composed of a specific structural unit, wherein
(1) the content of the polyorganosiloxane block portion is 1 to 30% by mass,
(2) the average number of the repeating structural units represented by the general formula (II) is 70 to 1000,
(3) the viscosity-average molecular weight of the copolymer is 13000 to 26000, and
(4) the content of the phenol residue having an allyl group in the copolymer is 400 ppm by mass or less, the copolymer providing a molded article having excellent thermal stability and excellent color tone after even when the molding is carried out at high temperature; a process for production of the copolymer; and a polycarbonate resin using the polyearbonate-polyorganosiloxane copolymer. |
