Polymerizable compound, polymerizable liquid crystal composition containing the same, and optically anisotropic medium made from the composition

A polymerizable liquid crystal composition for producing an optically anisotropic medium, which comprises:

• a polymerizable compound represented by formula (I):
• wherein Q1 and Q2 each independently represent a hydrogen atom or a methyl group;
• p and q each independently represent an integer of 2 to 18;
• X1 and X2 each independently represent a single bond, —O—, —COO— or —OCO—;
• L1 represents —COO— or —OCO—;
• L2 represents —CH2CH2COO— or —CH2CH2OCO—;
• and
• Y1, Y2 and Y3 each independently represent a hydrogen atom, an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkanoyl group having 2 to 7 carbon atoms, a cyano group or a halogen atom;
• and
• a compound represented by formula (II):
• wherein Q3 represents a hydrogen atom or a methyl group;
• X3 represents a single bond or —O—;
• X4 represents a single bond, —O—, —OCO—, —COO— or —CH═CH—COO—;
• B1, B2 and B3 each independently represent a 1,4-phenylene group, a 1,4-phenylene group in which one CH group or not adjoining two CH groups thereof are displaced with a nitrogen atom, a 1,4-cyclohexylene group, a 1,4-cyclohexylene group in which one CH2 group or not adjoining two CH2 groups thereof are displaced with an oxygen atom or a sulfur atom, a 1,4-cyclohexenylene group, or a 1,4-cyclohexenylene group in which one CH2 group or not adjoining two CH2 groups thereof are displaced with an oxygen atom or a sulfur atom, and B1, B2 and B3 each may have one or more substituents selected from an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkanoyl group having 2 to 7 carbon atoms, a cyano group, and a halogen atom;
• L3 and L4 each independently represent a single bond, —CH2CH2—, —CH2O—,—OCH2—, —COO—, —OCO—, —C≡C—, —CH═CH—, —CF═CF—, —(CH2)4—, —CH2CH2CH2O—, —OCH2CH2CH2—, —CH═CH—CH2CH2—, —CH2CH2—CH═CH—, —CH═CH—COO— or —OCO—CH═CH—;
• Z1 represents a hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 20 carbon atoms or an alkenyl group having 2 to 20 carbon atoms, wherein one or more CH2 groups of the alkyl group or the alkenyl group may be displaced with —O—, —CO—, —COO—, —OCO— or —OCOO—, provided that the displacement does not make an O—O bond;
• r represents 0 or an integer of 1 to 18;
• and
• s represents 0 or 1.