发明名称 |
Aqueous hexasubstituted guanidinium chlorides and methods for their preparation and use |
摘要 |
Hexasubstituted guanidinium chlorides are prepared by a method which affords them in high yield as aqueous solutions, optionally also containing alkali metal chlorides. The solutions may be employed as sources of hexasubstituted guanidinium salts useful as phase transfer catalysts for the reaction of alkali metal salts of dihydroxyaromatic compounds with substituted imides to form polyetherimides or their intermediates.
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申请公布号 |
US6570038(B1) |
申请公布日期 |
2003.05.27 |
申请号 |
US20000591426 |
申请日期 |
2000.06.09 |
申请人 |
CARINGI JOSEPH JOHN;PHELPS PETER DAVID;GUGGENHEIM THOMAS LINK;BRUNELLE DANIEL JOSEPH |
发明人 |
CARINGI JOSEPH JOHN;PHELPS PETER DAVID;GUGGENHEIM THOMAS LINK;BRUNELLE DANIEL JOSEPH |
分类号 |
C07D211/98;B01J31/02;B01J35/12;C07B61/00;C07C277/00;C07C279/04;C08G73/10;(IPC1-7):C07C279/02 |
主分类号 |
C07D211/98 |
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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