BRANCHED POLYCARBONATE-POLYSILOXANE COPOLYMER AND PREPARATION METHOD THEREOF

摘要

A branched polycarbonate-polysiloxane copolymer of the present invention is obtained from an aromatic dihydroxy compound, a carbonate precursor, a siloxane compound, and a branching agent, wherein the siloxane compound is a compound represented by chemical formula 2 of claim 1, a compound represented by chemical formula 3 of claim 1, or a combination thereof. The branched polycarbonate-polysiloxane copolymer has a Mark-Houwink constant which can be equal to about 0.50 or more and less than about 0.65, and has excellent processability due to low temperature impact resistance, chemical resistance and high temperature flowability.