发明名称 |
High-purity biphenyltetracarboxylic dianhydride and process for producing the same |
摘要 |
There is provided biphenyltetracarboxylic dianhydride containing biphenyltetracarboxylic monoanhydride in an amount of not more than 0.4%. By using the biphenyltetracarboxylic dianhydride as a raw material, it is possible to produce polyimide or polyamic acid having an increased molecular weight.
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申请公布号 |
US2004199010(A1) |
申请公布日期 |
2004.10.07 |
申请号 |
US20040753881 |
申请日期 |
2004.04.27 |
申请人 |
MIKAMI HIROSHI;SANO TAKESHI;NITTA MAKOTO |
发明人 |
MIKAMI HIROSHI;SANO TAKESHI;NITTA MAKOTO |
分类号 |
C07D307/89;C07C51/42;C07C63/331;(IPC1-7):C07C53/38 |
主分类号 |
C07D307/89 |
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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