Branched, high heat polycarbonates, methods of manufacture, and articles prepared therefrom

Abstract

A branched polycarbonate comprising: high heat aromatic carbonate units derived from a high heat aromatic dihydroxy monomer units; optionally, low heat carbonate units derived from low heat monomer units; and 0.05-1.5 mole percent, preferably 0.05-1.0 mole percent, of a branching agent based on the total number of moles in the branched polycarbonate; wherein the branched polycarbonate has a tensile stress at break of 10-70 megaPascals measured according to ISO 527, and a glass transition temperature of 170-260° C. measured by differential scanning calorimetry according to ASTM D3418 with a 20° C./min heating rate.

Dependencies are inferred from the claim text.