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US5449741A Polyimide optical material 失效
聚酰亚胺光学材料

Polyimide optical material
摘要:
A polyimide optical material, composed of a perfluorinated polyimide having a perfluorinated repeating unit represented by general formula (1) ##STR1## wherein R.sub.1 is a tetravalent perfluorinated organic group; and R.sub.2 is a divalent perfluorinated organic group.
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