Patent ID: 7014890

Claim:
A compound of formula (I) in which R 1 and R 2 , independently of one another, are each H, linear alkyl having from 1 to 12 carbon atoms or linear or branched alkenyl having from 2 to 8 carbon atoms, in which, in said alkyl and alkenyl, a) a non-terminal —CH 2 — group may be replaced by —O— or —C(═O)O— and/or b) a —CH 2 — group may be replaced by —C≡C—, cyclopropane-1,2-diyl or cyclobutane-1,3-diyl and/or c) one or more H atoms may be replaced by F, with the proviso that R 1 and R 2 are not simultaneously H; M 1 and M 2 , independently of one another, are each —C(═O)O—, —OC(═O)—, —CH 2 O—, —OCH 2 —, —C≡C—, —CH 2 CH 2 —, —(CH 2 ) 4 —, —CF 2 CF 2 —, —CF 2 O—, —OCF 2 — or a single bond; >E 1 -E 2 - is >C═CH— or >CH—CH 2 —; m and n, independently of one another, are each zero, 1 or 2, with the proviso that the sum m+n is zero, 1 or 2; p is zero or 1; and independently of one another, are each phenylene-1,4-diyl, optionally monosubstituted or polysubstituted by F, cyclohexane-1,4-diyl, optionally monosubstituted or disubstituted by F, 1-cyclohexene-1,4-diyl, optionally monosubstituted by F, or 1,3-dioxane-2,5-diyl.