Optical compensatory film, process for producing the same, and polarizing plate and liquid crystal display employing the same

An optical compensatory sheet comprising an optically anisotropic layer comprising:

• at least one liquid crystal compound,
• at least one cellulose ester, and
• at least one polymer A comprising:
• at least one repeating unit derived from a monomer having a fluoro-aliphatic group, and
• at least one repeating unit represented by a formula (1a):
• wherein R1a, R2a and R3a respectively represent a hydrogen atom or a substituent;
• La is a linking group selected from Linkage Group I shown below or a divalent group consisting of two or more selected from Linkage Group I shown below:
• (Linkage Group I)
• a single bond, —O—, —CO—, —NR4a— (R4a is a hydrogen atom, an alkyl group, an aryl group or an aralkyl group), —S—, —SO2—, —P(═O)(OR5a)— (R5a is an alkyl group, an aryl group or aralkyl group), an alkylene group and arylene group;
• and Qa is a carboxyl group (—COOH) or a salt thereof, a sulfo group (—SO3H) or a salt thereof or a phosphonoxy group {OP(═O)(OH)2} or a salt thereof,
• wherein the amount of the monomer containing a fluoro-aliphatic group is not less than 5 wt % with respect to the total amount of all monomers constituting the polymer A,
• wherein said at least one repeating unit derived from a monomer having a fluoro-aliphatic group is represented by formula (2a):
• where R11a is a hydrogen or methyl;
• Xa is oxygen (O), sulfur (S) or —N(R12a)— where R12a represents a hydrogen atom or a C1-4 alkyl group;
• Hf is hydrogen or fluorine;
• m is an integer from 1 to 6 and n is an integer from 2 to 4.