Polymerizable monomer, liquid crystal composition using polymerizable monomer, and liquid crystal display device

A liquid crystal composition for a liquid crystal display device, the liquid crystal composition comprising:

• a polymerizable monomer represented by General Formula (I);
• and
• a spontaneously aligning monomer selected from the group consisting of compounds represented by Formulae (P-1-1) to (P-1-15), (P-1-20) to (P-1-26), (P-J-10) to (P-J-50), and (P-1) to (P-18),
• wherein the content of the polymerizable monomer represented by General Formula (I) is 0.02 to 2.5% by mass, and the content of the spontaneously aligning monomer is 0.02 to 2.5% by mass,
• wherein R101, R102, R103, R104, R105, R106, R107, R108, R109, and R110 each independently represent any selected from the group consisting of P11—S11—, an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 18 carbon atoms, a halogen atom, and a hydrogen atom, and P11 represents any of the following Formula (R-I) to Formula (R-IX):
• wherein
• R21, R31, R41, R51, and R61 are each independently a hydrogen atom or an alkyl group having 1 to 5 carbon atoms,
• W is a single bond, —O—, or a methylene group,
• T is a single bond or —COO—,
• p, t, and q are each independently 0, 1, or 2,
• S11 represents a single bond or an alkylene group having 1 to 15 carbon atoms, and one or two or more —CH2—'s in the alkylene group may be substituted with —O—, —OCO—, or —COO— so that an oxygen atom is not directly adjacent thereto,
• n11 represents 0, 1, or 2,
• A11 represents a group selected from the group consisting of a group (a), a group (b), and a group (c) as follows:
• (a) 1,4-cyclohexylene group (one —CH2— or two or more non-adjacent —CH2—'s present in this group may be substituted with —O—),
• (b) 1,4-phenylene group (one —CH═ or two or more non-adjacent —CH═'s present in this group may be substituted with —N═), and
• (c) naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, or decahydronaphthalene-2,6-diyl group (one —CH═ or two or more non-adjacent —CH═'s present in the naphthalene-2,6-diyl group or the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group may be substituted with —N═),
• the group (a), the group (b), and the group (c) may be each independently substituted with an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, halogen atoms, a cyano group, a nitro group, or P11—S11—,
• L10 and L11 each independently represent a single bond, —OCH2—, —CH2O—, —C2H4—, —OC2H4O—, —COO—, —OCO—, —CH═CRa—COO—, —CH═CRa—OCO—, —COO—CRa═CH—, —OCO—CRa═CH—, —(CH2)z—COO—, —(CH2)z—OCO—, —OCO—(CH2)z—, —COO—(CH2)z—, —CH═CH—, —CF2O—, —OCF2—, or —C≡C— (wherein, Ra's each independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and z's each independently represent an integer of 1 to 4),
• at least two or more P11—S11—'s are included in one molecule of General Formula (I), and
• at least one alkyl group having 1 to 18 carbon atoms is included in the polymerizable monomer represented by General Formula (I), in which one —CH2— or two or more non-adjacent —CH2—'s in an alkylene group of said at least one alkyl group may be each independently substituted with —O—, and
• in a case where there are a plurality of P11's, S11's, L11's, and A11's, those may be the same as or different from each other,