发明名称 |
PROCESS FOR PREPARING POLYCARBONATE |
摘要 |
A method for preparing polycarbonates by melt polycondensation of a dihydroxy compound and a diarylcarbonate compound in the presence of an alkaline catalyst is described. A branching quencher compound is added to an intermediate polycarbonate produced by the melt polycondensation reaction in an amount effective to inhibit or prevent the formation of branching species during a subsequent finishing process. Adding the branching quencher compound to the product of the melt polycondensation reaction produces finished polycarbonates with reduced branching species, high ductility and impact strength. |
申请公布号 |
WO03020793(A2) |
申请公布日期 |
2003.03.13 |
申请号 |
WO2002US24907 |
申请日期 |
2002.08.06 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
VOLKERS, ANDRE, A.;PUYN, MARCEL, ANTONIUS, FRANSISCUS |
分类号 |
C08G64/30 |
主分类号 |
C08G64/30 |
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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