Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Disclosed are rigid fluorinated monomers, their preparation, and polymers derived therefrom based on two novel tricyclic xanthene core systems, 9,9-bis-(perfluoroalkyl)xanthene (I) and 9-phenyl-9-perfluoro-alkylxanthene (II). The monomers have utility in the preparation of advanced high-performance polymers, particularly polyimides.
E. I. Du Pont de Nemours and Company
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