Patent ID: 7670502

Claim:
A liquid crystal composition comprising a component(π) said component (π) containing one or more compounds of formula I-K and/or I-L whereby n is an integer from 1 to 8 and one or more compounds of formula II wherein R 21 is C 1 -C 15 alkyl which is unsubstituted or mono- or poly-substituted with halogen and in which one or more of the CH 2 groups may be replaced independently of each other by —O—, —S—, —CH═CH—, —C≡C—, —CO—O—, —OC—O— such that there are no hetero atoms adjacent to each other; Z 21 , Z 22 , Z 23 are independently of each other a single bond, —CO—O—, —O—CO—, —CH 2 O—, —OCH 2 —, —CF 2 O—, —OCF 2 —, —CH 2 CH 2 —, (—CH 2 CH 2 —) 2 , —CF═CF—, —CF 2 CF 2 —, —CH 2 CF 2 —, —CF 2 CH 2 —, —CH═CH— or —C≡C—; X 21 is F, Cl, SF 2 , NCS, or a C 1 to C 8 alkanyl, alkenyl or alkoxy radical substituted with at least one F atom; L 21 is H or F; and A 21 , A 22 and A 23 are independently of each other one of the following rings: and wherein said liquid crystal composition is free of compounds having an end ring substituted with at least one cyano group.