发明名称 |
Aromatic polycarbonate, process for producing the same, polycarbonate composition, and hollow container obtained from the same |
摘要 |
A subject for the invention is to provide a branched aromatic polycarbonate which is excellent in hue and in melt characteristics such as melt strength. The invention provides a branched aromatic polycarbonate having a viscosity-average molecular weight of 16,000 or higher obtained by the transesterification method, characterized in that the ratio of the weight-average molecular weight (Mw) to number-average molecular weight (Mn) as measured by gel permeation chromatography and calculated for standard polystyrene (Mw/Mn) is in the range of from 2.8 to 4.5 and that the proportion of the number of moles of all structural units yielded by a rearrangement reaction in the course of melt polymerization reaction to 1 mol of structural units having the framework of an aromatic dihydroxy compound used as a starting material is higher than 0.3 mol % and not higher than 0.95 mol.
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申请公布号 |
US7084233(B2) |
申请公布日期 |
2006.08.01 |
申请号 |
US20040813042 |
申请日期 |
2004.03.31 |
申请人 |
MITSUBISHI ENGINEERING-PLASTICS CORPORATION |
发明人 |
MIYAMOTO MASAAKI;TAYAMA TAKAO;NAKANO HIROSHI |
分类号 |
C08G64/00;C08G64/14;C08G64/30 |
主分类号 |
C08G64/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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