| 摘要 |
A composition containing a polycarbonate, a polycarbonate-polysiloxane copolymer, an impact modifier, and a polyetherimide, wherein the polycarbonate comprises greater than or equal to about 50% by weight of the combined weights of the polycarbonate, polycarbonate-polysiloxane copolymer, impact modifier and polyetherimide and wherein a 3.2 millimeter thick, 7.6 centimeter square sample of the composition produces a smoke density (Ds) of less than 275 after a 4-minute burn, measured according to ASTME 662-03. In one embodiment, a composition may contain about 60 to about 85 wt. % polycarbonate, about 8 to about 20 wt. % polycarbonate-polysiloxane copolymer, about 0.5 to about 20 wt. % impact modifier, and about 1 to about 10 wt. % polyetherimide.
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