申请人:Nippon Telegraph and Telephone Corporation
公开号:US05233018A1
公开(公告)日:1993-08-03
A perfluorinated polyimide comprising a repeating unit represented by general formula (1): ##STR1## and a perfluorinated poly(amic acid) comprising a repeating unit represented by general formula (6): ##STR2## wherein R.sub.1 is a tetravalent organic group; and R.sub.2 is a divalent organic group, provided that chemical bonds between carbon atoms and monovalent elements contained in R.sub.1 and R.sub.2 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-difluoropyromellitic 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 .mu.m).
一种全氟聚酰亚胺,其包含由通式(1)表示的重复单元:##STR1##以及一种全氟聚酰胺酸,其包含由通式(6)表示的重复单元:##STR2##其中R.sub.1是四价有机基团;而R.sub.2是二价的有机基团,前提是R.sub.1和R.sub.2中含有的碳原子与单价元素之间的化学键仅为碳氟键;制备它们的方法;以及包括该全氟聚酰亚胺的光学材料。1,4-双(3,4-二羧基三氟苯氧基)四氟苯二酐,1,4-二氟吡咯烷二酐,1,4-双(3,4-二羧基三氟苯氧基)四氟苯,1,4-二氟吡咯烷酸和1,4-双(3,4-二氰基三氟苯氧基)四氟苯以及制备它们的方法。该全氟聚酰亚胺具有热稳定性,并且在光通信波长区域(0.8至1.7μm)具有低光学损耗。