REGIOSELECTIVELY SUBSTITUTED CELLULOSE ESTER BASED NEGATIVE BIREFRINGENT COMPENSATION FILMS HAVING IMPROVED WAVELENGTH DISPERSION

摘要

The present application discloses stretched films comprising regioselectively substituted cellulose esters and a component A: (I), (II), (III), or (IV), wherein A, B, C, R¹, R², R⁵, R⁶, R⁸, R9, m, n, and k are defined herein. The films exhibit negative birefringence and improved wavelength dispersion.