Perfluorinated polyimide, 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 255/54 (2006.01) C07D 209/48 (2006.01) C07D 487/04 (2006.01) C07D 491/048 (2006.01) C08G 73/10 (2006.01)

Patent

CA 2052368

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. l,4-Bis(3,4-dicarboxytrifluorophenoxy)- tetrafluorobenzene dianhydride, 1,4-difluoropyro-mellitic anhydride, 1,4 bis(3,4-dicarboxytrifluorophenoxy) tetrafluorobenzene, 1,4-difluoropyromellitic acid, and 1,4-bis(3,4-dicyanotrifluorophenoxy) tetrafluorobenzene 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).

Polyimide perfluoré renfermant une unité répétée de formule générale (1) (voir fig. I) et un poly(acide amique) perfluoré contenant une unité répétée, représentée par la formule générale (6) (voir fig. II), où R1 est un groupe organique tétravalent, et R2 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-fluorure; méthodes pour les préparer; produit optique renfermant le polyimide perfluoré. Dianhydride de l,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 a une stabilité thermique et une faible perte dans la région de longueur d'onde pour communication optique (0,8 à 1,7 microns).

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