Patent ID: 8366962

Claim:
A polymerizable liquid crystal compound represented by formula (1-1) or formula (1-2): wherein A 1 and A 2 are each independently 1,4-cyclohexylene, 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, naphthalene-2,6-diyl, tetrahydronaphthalene-2,6-diyl, fluorene-2,7-diyl, 1,3-dioxane-2,5-diyl, triptycene-1,4-diyl or phenylnorbornene-1,4-diyl, and in the 1,4-phenylene and fluorene-2,7-diyl, arbitrary hydrogen may be replaced by fluorine, chlorine, cyano, methyl, ethyl, methoxy, hydroxy, formyl, acetoxy, acetyl, trifluoroacetyl, difluoromethyl or trifluoromethyl; Z 1 is independently a single bond, —O—, —COO—, —OCO—, —CH═CH—COO—, —OCO—CH═CH—, —OCO—CH 2 CH 2 —, —CH 2 CH 2 —COO—, —C≡C—COO—, —OCO—C≡C—, —CH 2 O—, —OCH 2 —, —CF 2 O—, —OCF 2 —, —CONH—, —NHCO—, —(CH 2 ) 4 —, —CH 2 CH 2 —, —CF 2 CF 2 —, —CH═CH—, —CF═CF— or —C≡C—; m is an integer from 1 to 5, and when m is 2 or more, arbitrary two of Z 1 may be the same bonding groups or different groups and arbitrary two of A 2 may be the same rings or different rings; Q 1 and Q 2 are each independently alkylene having 1 to 20 carbons, and in the alkylene, arbitrary hydrogen may be replaced by fluorine or chlorine, and arbitrary —CH 2 — may be replaced by —O—, —COO—, —OCO—, —CH═CH— or —C≡C—; R 1 is hydrogen, fluorine, chlorine, cyano, trifluoromethyl, trifluoromethoxy, alkyl having 1 to 20 carbons or alkoxy having 1 to 20 carbons; R a is hydrogen, halogen or alkyl having 1 to 5 carbons; and R b is independently hydrogen, halogen or alkyl having 1 to 5 carbons.