Patent ID: 8691902
Filing Date: 2014-04-08
Classification: C08J,C08K,C08L

Abstract:
1. A thermoplastic polycarbonate composition comprising, based on the total weight of the thermoplastic polycarbonate composition: (a) greater than 10 to less than 30 wt % of a reinforcing mineral filler, wherein the reinforcing mineral filler consists of talc; and (b) greater than 60 to less than 90 wt. % of a polymer component, comprising, based on the weight of the polymer component, wherein a molded sample of the thermoplastic polycarbonate composition has no drips when measured in accordance with NF P 92-505 at a thickness of 1.5 mm, a smoke density index of less than 10, determined in accordance with the formula: wherein SDI is the smoke density index; Ds max is the maximum smoke density; and VOF4 is the average smoke density measured over the first four minutes, and is calculated in accordance with the formula: wherein Ds0 is the smoke density at 0 minutes, Ds1 is the smoke density at 1 minute, Ds2 is the smoke density at 2 minutes, Ds3 is the smoke density at 3 minutes, and Ds4 is the smoke density at 4 minutes; and Ds max, Ds0, Ds1, Ds2, Ds3, and Ds4 are measured in accordance with NF X 10-702 at a thickness of 3 mm, and 100% ductility in a multi-axial impact test at 23° C., measured in accordance with ISO 6603.