Patent ID: 8703856

Claim:
A composition comprising, based on the total weight of the composition: a polycarbonate that is not a polysiloxane block co-polycarbonate; 7.5 to 25 wt % of a polysiloxane block co-polycarbonate; 5 to 15 wt % of a transition metal oxide comprising at least one of chromium dioxide and titanium dioxide; 2 to 30 wt % of a brominated organic flame retardant or a halogen organic flame retardant compound; optionally 0 to 1 wt % of a fluorinated polyolefin; optionally an additive that imparts a desired performance property; and optionally a carbon black containing material, wherein said composition has a p(FTP)V0 flammability rating of greater than 0.85 at 1.5 mm, 1.0 mm, or 0.8 mm or between 1.5 mm and 0.8 mm according to the method of UL 94, and further wherein the composition does not show tracking through at least 50 drops of a 0.1% aqueous ammonium chloride solution at 250V according to ASTM D-3638.