| 摘要 |
K-17926/17927/+/CGC 1462 DISUBSTITUTED AROMATIC DIANHYDRIDES AND POLYIMIDES PREPARED THEREFROM Aromatic dianhydrides being substituted in the positions ortho to the bridging moiety, said substituent groups including halogen, alkyl, hydroxy, nitro, cyano, ester, alkoxy, perfluoroalkyl, mercapto and thioester groups, said dianhydrides providing certain beneficial properties to polyimides prepared therefrom.
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