Perfluorinated polymide, perfluorinated poly (amic acid),...

C - Chemistry – Metallurgy – 07 – D

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C07D 307/89 (2006.01) C07C 63/68 (2006.01) C07C 65/24 (2006.01) C07C 255/51 (2006.01) C07C 255/54 (2006.01)

Patent

CA 2199703

A perfluorinated polyimide comprising a repeating unit represented by general formula (1): (see fig. I) and a perfluorinated poly(amic acid) comprising a repeating unit represented by general formula (6): (see fig. II) wherein R1 is a tetravalent organic group; and R2 is a divalent organic group, provided that chemical bonds between carbon atoms and monovalent elements contained in R1 and R2 are exclusively carbon-to-fluorine bonds; methods for preparing them; and optical material including the perfluorinated polyimide. 1,4-Bis(3,4-dicarboxytrifluorophenoxy)- tetrafluorobenzene dianhydride, 1,4-difluoropyro-mellitic anhydride, 1,4-bis(3,4-dicarboxytrifluoro- phenoxy)tetrafluorobenzene, 1,4-difluoropyromellitic acid, and 1,4-bis(3,4-dicyanotrifluorophenoxy)tetra- fluorobenzene as well as methods preparing them. The perfluorinated polyimide has a thermal stability and has a low optical loss in an optical communication wavelength region (0.8 to 1.7 µm).

Un polyimide perfluoré renfermant une unité répétitive, représentée par la formule générale 1 (voir fig. I) et un poly(acide amique) perfluoré, renfermant une unité répétitive représentée par la formule générale 6 (voir fig. II), où R1 est un groupe organique tétravalent, R2 est un groupe organique divalent, à la condition que les liaisons chimiques entre les atomes de carbone et les éléments monovalents présents dans R1 et R2 soient exclusivement des liaisons carbone-fluor; méthodes pour les préparer; matière optique renfermant le polyimide perfluoré. Dianhydride de 1,4-bis(3,4-dicarboxytrifluorophénoxy)tétrafluorobenzène, anhydride 1,4-difluoropyromellitique, 1,4-bis(3,4-dicarboxytrifluorophénoxy)tétrafluorobenzène, acide 1,4-difluoropyromellitique et 1,4-bis(3,4-dicyanotrifluorophénoxy)tétrafluorobenzène; méthodes pour les préparer. Le polyimide perfluoré est thermiquement stable et présente une faible perte optique dans la région des longueurs d'onde des communications optiques (0,8 à 1,7 microns).

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