POLYCARBONATE-POLYCARBONATE/POLYSILOXANE COMPOSITIONS HAVING HIGH FLOW, HIGH IMPACT, AND GOOD RELEASE PROPERTIES

摘要

Thermoplastic compositions include a polycarbonate-siloxane copolymer comprising: from about 49.5 wt % to about 97.95 wt % of at least one polycarbonate polymer; from about 2.0 wt % to about 49.5 wt % of at least one polycarbonate-siloxane r copolymer; and from about 0.05 wt % to about 1.0 wt % of at least one release agent. The composition exhibits a melt volume flow rate of at least about 25 cm3/10 min, a ductile/brittle transition temperature of less than or equal to 10° C., and high gloss after metallization and/or a substantial tensile yield strength retention improvement when exposed to sunscreen. Methods of forming an article include: forming a mixture comprising the thermoplastic composition, and injection molding, extruding, rotational molding, blow molding or thermoforming the mixture in a mold to form the article. Such compositions and methods may be used to form articles including, but not limited to, automotive bezels and housings in consumer devices.