Patent ID: RE44023

Claim:
An article, comprising: a thermoplastic composition comprising a polysiloxane-polycarbonate copolymer, wherein the copolymer comprises repeating diorganosiloxane units of formula ( 1 13 ): wherein each R is, independently, a C 1-13 monovalent organic group, each occurrence of R 1 is independently a divalent C 1 -C 30 alkylene, and E has an average value of about 20 to about 35; wherein the article is transparent and has a dimension that is greater than or equal to about 1.5 cm; wherein the thermoplastic composition is defined in that an ⅛ th inch thick bar formed from the thermoplastic composition has a B-Y ratio of less than or equal to about 1.75, wherein the B-Y ratio is determined as a B-Y span of a molded part formed from the thermoplastic composition divided by a B-Y span of a molded part formed from a siloxane-free thermoplastic composition, the siloxane-free thermoplastic composition having a composition identical to that of the thermoplastic composition except for the omission of the diorganosiloxane units; and wherein the thermoplastic composition has about 2 wt % to about 6 wt % polysiloxane amount of siloxane in the polycarbonate-polysiloxane copolymer is from about 0.5 wt. % to about 7 wt %, based on the total weight of the copolymer .