| 摘要 |
<p>The invention seeks to provide a branched polycarbonate resin having a high branching agent content, which has a good melt tension, virtually causes no drawdown and permits stable molding when it is molded in extrusion molding, blow molding, injection molding, vacuum molding, etc., and a process for producing the same. This invention provides 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, the branched polycarbonate resin having features that:
(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), 3.8 �¢ X - 2.4 ‰¤ Y ‰¤ 3.8 �¢ X + 4.5
and
(iii) the entire N content in the branched polycarbonate resin is 0 to 7 ppm.</p> |
