| 摘要 |
PROBLEM TO BE SOLVED: To provide tetraphenol branching agents which give desired viscosity characteristic to polycarbonates and do not give other serious defects. SOLUTION: Branched polycarbonates having properties suitable for blow molding are prepared by equilibrating a linear or branched aromatic polycarbonate with certain tetraphenols, especially [1,1-bis(p-hydroxyphenyl)ethyl]-phenyl ether. COPYRIGHT: (C)2008,JPO&INPIT
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