ALICYCLIC OR AROMATIC POLYAMIDES, POLYAMIDE FILMS, OPTICAL MEMBERS MADE BY USING THE SAME, AND POLYAMIDE COPOLYMERS

摘要

An alicyclic or aromatic polyamide exhibiting a percent transmission of 80 % or above in the wavelength region of 450 to 700nm is produced by using an aramid polymer comprising specific structural units in an amount of 50 mole% or above. Colorless transparent alicyclic or aromatic polyamide films having high rigidity and high heat resistance are provided by using the polyamide. Further, the invention provides various optical members made by using the polyamide or the polyamide films, and polyamide copolymers.