Patent ID: 8541537
Filing Date: 2013-09-24
Classification: C08G

Abstract:
1. A branched polycarbonate resin obtained from a dihydric phenol compound, a branching agent, monohydric phenols and phosgene by an interfacial polymerization reaction method in the presence of an alkali aqueous solution and an organic solvent, wherein the dihydric phenol compound is 2,2-bis(4-hydroxyphenyl)propane, and wherein, for the branched polycarbonate resin: (i) the branching agent content (X) thereof is over 0.70 mol % but 1.50 mol % or less, (ii) the branching agent content (X) and the melt tension (Y) thereof at 280° C. satisfy the following expression (1), and (iii) the entire N content in the branched polycarbonate resin is 0 to 7 ppm, and (iv) the branched polycarbonate resin has a viscosity average molecular weight in the range of 1.8×10