发明名称 |
Method for preparing brominated polycarbonates |
摘要 |
<p>High flow brominated polycarbonates, useful as flame retardant additives for other polymers such as polyesters, are obtained by equilibration of a brominated aromatic polycarbonate such as a tetrabromobisphenol A homo- or copolycarbonate with a di- or polyhydroxy aromatic compound such as bisphenol A, or a dialkyl carbonate, and an equilibration catalyst, under conditions such that the weight average molecular weight of the brominated polycarbonate is reduced by at least 35%. Preferred equilibration catalysts are Group I metal carboxylates, such as sodium stearate, and hexaalkylguanidinium salts.</p> |
申请公布号 |
EP0900816(A1) |
申请公布日期 |
1999.03.10 |
申请号 |
EP19980306963 |
申请日期 |
1998.08.28 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
MCCLOSKEY, PATRICK JOSEPH;DAVIS, GARY CHARLES;DARDARIS, DAVID MICHEL;BRUNELLE, DANIEL JOSEPH;GALLUCCI, ROBERT RUSSELL;TJAHJADI, MAHARI;SNOW, KEVIN MITCHELL;WHALEN, DAVID |
分类号 |
C08L23/00;C08G64/10;C08G64/42;C08L33/06;C08L67/00;C08L69/00;H01R13/46;H01R13/73;(IPC1-7):C08G64/42;C08K5/31 |
主分类号 |
C08L23/00 |
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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