Cellulose ester film, optically compensatory film, polarizing plate, and liquid crystal display device

Abstract

A cellulose ester film is provided and includes a polycondensate obtained from a diol and a dicarboxylic acid, and the polycondensate contains the following (1) and (2). (1) A dicarboxylic acid residue containing an aromatic dicarboxylic acid residue and an aliphatic dicarboxylic acid residue having an average carbon number of 4.0 to 5.0, in which a ratio of the aromatic dicarboxylic acid residue represented by the following equation is from 40% by mole to 95% by mole: The ratio of the aromatic dicarboxylic acid residue=[(the number of moles of the aromatic dicarboxylic acid residue)/((the number of moles of the aromatic dicarboxylic acid residue)+(the number of moles of the aliphatic dicarboxylic acid residues))]×100. (2) An aliphatic diol residue having an average carbon number of 2.0 to 3.0.

Dependencies are inferred from the claim text.