Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
528125, 528170, 528172, 528173, 528176, 528185, 528188, 528190, 528191, 5283291, 528350, 528353, 549388, C08G 6300, C08G 7310, C08G 6920, C07D31182
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-perfluoroalkylxanthene (II). The monomers have utility in the preparation of advanced high-performance polymers, particularly polyimides.
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E. I. Du Pont de Nemours and Company
Kight III John
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