POLYMER MIXTURE COMPRISING AROMATIC POLYCARBONATE, STYRENE-CONTAINING COPOLYMER AND/OR GRAFT POLYMER, AND POLYSILOXANE-POLYCARBONATE BLOCK COPOLYMER AND ARTICLE FORMED THEREFROM

摘要

PURPOSE: To prepare a polymer mixture which contains an arom. polycarbonate, a styrene-contg. copolymer and/or a styrene-contg. graft polymer, and a specific polysiloxane-polycarbonate block copolymer and has an improved impact strength. ;CONSTITUTION: This polymer mixture contains an arom. polycarbonate (A) not contg. a polysiloxane block, a styrene-contg. copolymer and/or a styrene- contg. graft polymer contg. rubberlike graft agent (B), and a polysiloxane- polycarbonate block copolymer (C) comprising 1-50 wt.% polysiloxane block (i) of formula I (wherein R¹ to R⁶ are each H, hydrocarbyl, or the like; D is 5-140; and Y is H or an alkoxy) and 50-99 wt.% polycarbonate block (ii) of formula II (wherein A₁ is a 1-15C divalent hydrocarbon group, S, or the like; and X is H, a monovalent hydrocarbon group, or the like). Pref., the mixture comprises 60-80 wt.% ingredient A, 5-20 wt.% ingredient B, and 5-20 wt.% ingredient C.;COPYRIGHT: (C)1994,JPO