Patent ID: 8592010

Claim:
An optical compensation film based on cellulose acylate for liquid-crystal displays, comprising: a mixture of a cellulose acylate and one or more compounds having two or more rings, where at most one of these rings is an aromatic ring, wherein the one or more compounds having two or more rings are of formula I: R 1 -A 1 -(Z 1 -A 2 ) m -R 2 I in which R 1 and R 2 each, independently of one another, denote F, Cl, Br, I, OH, —CN, —NO 2 —, —NCO, —NCS, —OCN, —SCN, —NH 2 , —SF 5 , straight-chain or branched alkyl or alkoxy having 1 to 12 C atoms, in which one or more CH 2 groups are each optionally replaced by —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O—, —CH═CH—, —C≡C—, —NR 0 —, —CO—NR 0 —, —NR 0 —CO— in such a way that O and/or S atoms are not linked directly to one another, and in which one or more H atoms are each optionally replaced by F, Cl or CN, A 1 and A 2 each, independently of one another, denote one of the radicals A 1 and A 2 present optionally denotes in which L 1 and L 2 each, independently of one another, denotes H, F or Cl Z 1 on each occurrence, identically or differently, denotes —COO—, —OCO—, —CH 2 O—, —OCH 2 —, —CH 2 S—, —SCH 2 —, —CF 2 O—, —OCF 2 —, —CH 2 CH 2 —, —CH 2 CF 2 —, —CF 2 CH 2 —, —C 2 F 4 —, —CH═CH—, —CH═CF—, —CF═CH—, —CF═CF—, —C≡C— or a single bond, R 0 denotes hydrogen or C 1 -C 7 -alkyl, and m denotes an integer 1, 2, 3 or 4.