发明名称 |
Method for quenching of catalyst in the production of low molecular weight polycarbonates |
摘要 |
Improved performance in high temperature, high vacuum reactors is obtained by quenching alkaline catalyst present in the product a melt polycondensation reaction using a sulfonic acid ester quencher in a carrier. The carrier if formed from a first carrier component effective to solubilize the quencher and having a lower boiling point than the quencher, and a second carrier component soluble in the first carrier component and having a higher boiling point than the quencher. An exemplary carrier composition contains equal parts of diphenylcarbonate and toluene.
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申请公布号 |
US6177536(B1) |
申请公布日期 |
2001.01.23 |
申请号 |
US19990255147 |
申请日期 |
1999.02.22 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
ANAMIZU TAKAYOSHI;KANEZAWA AKIO;SHIMODA TOMOAKI;MESTANZA RAPHAEL |
分类号 |
C08G64/30;C08G64/40;(IPC1-7):C08G64/02 |
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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