| 摘要 |
PURPOSE: A polycarbonate-polysiloxane copolymer is provided to be able to maintain a high transparency, a low haze and an excellent impact strength in a high temperature molding condition. CONSTITUTION: A polycarbonate-polysiloxane copolymer includes a polysiloxane unit represented by Chemical formula 1, wherein R^1, R^2, R^3 and R^4 are, respectively, substituted or non-substituted C1-10 alkyl, or substituted or non-substituted C6-C18 aryl, * is a polycarbonate unit connector, R" is C4-C20 aliphatic or cycloaliphatic hydrocarbon, the carbon positioned in the second position from the polycarbonate unit connector is substituted with alkyl or cycloalkyl, and n is an integer of 30-90. |
