POLYCARBONATE RESIN OF LOW PHOTOELASTIC CONSTANT, AND OPTICAL FILM

摘要

PROBLEM TO BE SOLVED: To provide a polycarbonate resin having a low photoelastic constant, good fluidity and excellent thermal stability, wherein the polycarbonate resin can give a film having wavelength dispersion suitable to optical applications such as a retardation film and a polarizer protective film, and to provide an optical film made of the polycarbonate resin.

SOLUTION: The polycarbonate resin has a repeating unit (A) as its main repeating unit and a specific viscosity of 0.20-1.50 measured with a methylene chloride solution at 20°C. The optical film made of the polycarbonate resin shows optional wavelength dispersion. In the formula of the repeating unit (A), R1, R2, R3, R4, R5and R6each independently indicate a hydrogen atom or a 1-10C hydrocarbon group; R1and R2may combine with each other to form a carbon ring or a heterocycle; R4and R5may combine with each other to form a carbon ring or a heterocycle; and m and n indicate the same or different integer of 1-4.

COPYRIGHT: (C)2011,JPO&INPIT