| abstract |
An optical film having high heat resistance, low retardation, and good fluidity is provided. For example, 9,9-bis (4-hydroxy-3-methylphenyl) fluorene, 9-bis [4- (2-hydroxyethoxy) phenyl] fluorene, 2,2-bis (4-hydroxyphenyl) A polycarbonate resin obtained by heating propane, diphenyl carbonate and tetramethylammonium hydroxide and sodium hydrogen carbonate as a catalyst in a nitrogen atmosphere, and an optical film using the resin. [Selection figure] None |