Patent ID: 8043670

Claim:
A liquid crystal material comprising at least one non-polymerizable liquid crystalline compound and at least one liquid crystalline compound of formula I wherein P is a polymerizable group of the formula CH 2 ═CW 1 —COO—, (CH 2 ═CH) 2 CH—OCO—, (CH 2 ═CH—CH 2 ) 2 CH—OCO—, (CH 2 ═CH) 2 CH—O—, (CH 2 ═CH—CH 2 ) 2 N—, (CH 2 ═CH—CH 2 ) 2 N—CO—, HO—CW 2 W 3 —, HS—CW 2 W 3 —, HW 2 N—, HO—CW 2 W 3 —NH—, CH 2 ═CW 1 —CO—NH—, CH 2 ═CH—(COO) k1 -Phe-(O)—, Phe-CH═CH—, HOOC—, OCN— or W 4 W 5 W 6 Si—, with W 1 being H, Cl, CN, phenyl or alkyl with 1 to 5 C-atoms, W 2 and W 3 each independently being H or alkyl with 1 to 5 C-atoms, W 4 , W 5 and W 6 each independently being Cl, oxaalkyl or oxacarbonylalkyl with 1 to 5 C-atoms, Phe being 1,4-phenylene optionally substituted by one or more groups L, k 1 and k 2 are each independently 0 or 1, and F, Cl, Br, I, CN, NO 2 or alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy with 1 to 20 C atoms, wherein one or more H atoms may be substituted by F or Cl, Sp is a spacer group, A 1 is each independently an aromatic or aliphatic 5- or 6-atom ring, or a group comprising two or three fused aromatic or aliphatic 5- or 6-membered rings, said rings optionally containing one or more N, O or S hetero atoms, and optionally being mono- or polysubstituted, Z 1 is each independently —O—, —S—, —CO—, —COO—, —OCO—, —S—CO—, —CO—S—, —O—CO—O—, —CO—NR 0 —, —NR 0 —CO—, —OCH 2 —, —CH 2 O—, —SCH 2 —, —CH 2 S—, —CF 2 O—, —OCF 2 —, —CF 2 S—, —SCF 2 —, —CH 2 CH 2 —, —CF 2 CH 2 —, —CH 2 CF 2 —, —CF 2 CF 2 —, —CH═CR 0 —, —CH═CH—, —CH═CF—, —CY 1 ═CY 1 —, —C≡C—, —CH═CH—COO—, —OCO—CH═CH— or a single bond, R 0 and R 00 are each independently H or alkyl with 1 to 12 C-atoms, Y 1 and Y 2 are each independently H, F, Cl or CN, Q is F, Cl, SF 5 or fluorinated alkyl, alkoxy, alkenyl or alkenyl-oxy with 1 to 6 C-atoms, X 1 and X 2 are each independently H or F, m is 0, 1 or 2, and n is 0 or 1.