Thermoplastic Compositions, Method of Manufacture, and Articles Therefrom

摘要

This disclosure relates to thermoplastic compositions, in particular polycarbonate thermoplastic compositions containing a surface-treated talc, methods for the manufacture of such compositions, and articles formed from the compositions.

主权项

1. A thermoplastic composition comprising, based on the total weight of the thermoplastic composition:
(a) 30-60 percent of one or more polycarbonates; (b) 10-40 percent of one or more polyesters; (c) 0-30 percent of one or more impact modifiers; (d) 5-35 percent of talc that is surface treated with a combination of 85 to 90 weight percent cetyl dimethicone and 10 to 15 percent 1-hexadecane, wherein the talc is characterized by:
(i) a mean particle diameter if 1.8 μm;(ii) a Hegman fineness on grind value of 7;(iii) a surface area of 14 m2/g; a specific gravity of 2.8;(iv) an average moisture of <0.5 weight percent; and(v) a bulk density of 40 lbs/ft3.