| 摘要 |
TITLE PIGMENTED POLYCARBONATES Polycarbonates are pigmented with an opaque pigment such as TiO2 and contain, intimately mixed therein, a silica at a level of 0.01 to 3% by weight. The silicas are those produced by the flame hydrolysis of SiCl4 and have a particle size up to about 10 microns. The pigmented polycarbonates can be moulded to form articles having excellent surface appearance and are especially adapted for moulding polycarbonates in moulds having radical contours and fine interstices which constrict the flow path of the polycarbonate during moulding. |
