Polymerizable liquid crystal compound, polymerizable liquid crystal composition, and polymer thereof

A polymerizable liquid crystal composition comprising at least one polymerizable liquid crystal compound selected from the group of compounds represented by the formula (1), and at least one polymerizable compound selected from the group of compounds represented by the formulae (M1), (M2-1), (M2-2), (M3) and (M4):

• wherein
• at least one of Ra represents a polymerizable group represented by one of the formulae (p-1) to (p-6), and Ra, which is not the polymerizable group, represents chlorine, fluorine, cyano, alkyl having from 1 to 10 carbon atoms, alkoxy having from 1 to 10 carbon atoms, —CF3 or —OCF3:
• wherein Rb1 and Rb2 independently represent hydrogen, halogen, alkyl having from 1 to 5 carbon atoms or halogenated alkyl having from 1 to 5 carbon atoms;
• A independently represents 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalen-2,6-diyl, tetrahydronaphthalen-2,6-diyl, fluoren-2,7-diyl or bicyclo[2.2.2]octan-1,4-diyl;
• in which one or two —CH2— in the 1,4-cyclohexylene may be replaced by —O— provided that two —CH2— adjacent to each other are not replaced simultaneously, one or two —CH═ in the 1,4-phenylene may be replaced by —N═, and arbitrary hydrogen in the 1,4-phenylene may be replaced by halogen, cyano, alkyl having from 1 to 5 carbon atoms or halogenated alkyl having from 1 to 5 carbon atoms;
• Z independently represents a single bond or alkylene having from 1 to 20 carbon atoms;
• in which in the alkylene, arbitrary —CH2— may be replaced by —O—, —CO—, —COO—, —OCO—, —CH═CH—, —CF═CF— or —C≡C—, and arbitrary hydrogen may be replaced by halogen;
• Y independently represents a single bond or alkylene having from 1 to 20 carbon atoms;
• in which in the alkylene, arbitrary —CH2— may be replaced by —O—, —CO—, —COO—, —OCO—, —OCOO— or —CH═CH—, and arbitrary hydrogen may be replaced by halogen;
• and
• m and n independently represent an integer of from 0 to 5,
• wherein
• R1 independently represents a group represented by one of the formulae (p-1) to (p-6);
• R2 represents alkyl having from 1 to 10 carbon atoms, alkoxy having from 1 to 10 carbon atoms, chlorine, fluorine, cyano, —CF3 or —OCF3;
• A1 independently represents 1,4-cyclohexylene or 1,4-phenylene;
• in which arbitrary hydrogen in the 1,4-phenylene may be replaced by fluorine;
• Z1 independently represents a single bond, —CH2CH2—, —CH2O—, —OCH2—, —COO—, —OCO—, —CH═CH—, —C≡C—, —CH═CHCOO—, —CH═CHOCO—, —(CH2)2COO— or —(CH2)2OCO—;
• Y1 independently represents a single bond or alkylene having from 1 to 20 carbon atoms;
• in which arbitrary —CH2— in the alkylene may be replaced by —O—, —CO—, —COO—, —OCO—, —OCOO— or —CH═CH—;
• L1 independently represents hydrogen, fluorine or —CH3;
• L2 independently represents hydrogen, chlorine, fluorine, —CH3 or —CF3;
• and
• q represents 1 or 2.