| 发明名称 |
Synthesis of polybenzoxasole and polybenzothiazole precursors |
| 摘要 |
In a method of synthesis of polybenzoxazole and polybenzothiazole precursors, a dicarboxylic acid or a dicarboxylaic acid ester is reacted with a bis-o-aminophenol or bis-o-aminothiophenol in a suitable solvent in the presence of an activating reagent having the following structure: <IMAGE>
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| 申请公布号 |
US5883221(A) |
申请公布日期 |
1999.03.16 |
| 申请号 |
US19970988023 |
申请日期 |
1997.12.10 |
| 申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
SEZI, RECAI;KUEHN, EBERHARD;AHNE, HELLMUT;KOCMAN, SUELEYMAN |
| 分类号 |
C07C209/44;C07C211/05;C08G63/685;C08G63/82;C08G73/22;C08G75/32;(IPC1-7):C08G65/40;C08G63/00 |
主分类号 |
C07C209/44 |
| 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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