Patent ID: 7135538

Claim:
A composition, comprising a blend of: a polycarbonate-polysiloxane block copolymer comprising at least one polycarbonate block and at least one polysiloxane block; wherein the polycarbonate block comprises repeating units having the structure wherein about 60 to 100 percent of the total number of R 1 groups are substituted or unsubstituted divalent aromatic organic radicals and 0 to about 40 percent are divalent aliphatic radicals or divalent alicyclic radicals; and wherein the polysiloxane block comprises repeating units having the structure wherein each occurrence of R 2 is independently C 1 –C 12 hydrocarbyl; and a surface modifying agent comprising at least one polysiloxane segment wherein the surface modifying agent comprises, in addition to the at least one polysiloxane segment, at least one segment selected from polyolefins, polyesters, polyestercarbonates, polyethers, and polyarylates.