Branched polycarbonate resin and process for producing the same

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),
• 3.8X−2.4≦Y≦3.8X+4.5 (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 1.8×104 to 3.2×104.