Photoreactive liquid crystal composition, display element, optical element, method for manufacturing display element, and method for manufacturing optical element

A method for manufacturing an optical element, comprising:

• [I] filling a photoreactive liquid crystal composition comprising
• (A) a photoreactive polymer liquid crystal having a photoreactive side chain, which reacts by at least one reaction selected from the group consisting of (A-1) photocrosslinking and (A-2) photoisomerization, and
• (B) a low molecular liquid crystal
• into a space formed between two transparent substrates disposed in parallel and apart from each other, to form a liquid crystal cell;
• and
• [II] irradiating the liquid crystal cell with a polarized ultraviolet ray from one of the two transparent substrates,
• to form the optical element having a predetermined orientation of the (B) low molecular liquid crystal in the liquid crystal cell,
• wherein the (A) photoreactive polymer liquid crystal comprises any one photoreactive side chain selected from the Croup consisting of the following formulae (11) to (13):
• wherein A independently represents a single bond, —O—, —CH2—, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO—O—, or —O—CO—CH═CH—;
• B represents —O—, —CH2—, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO—O—, or —O—CO—CH═CH—;
• X represents a single bond, —COO—, —OCO—, —N═N—, —CH═CH—, —C≡C—, —CH═CH—CO—O—, or —O—CO—CH═CH—, and in a case where the number of X is 2, these Xs may be the same or different;
• l represents an integer of 1 to 12, m represents an integer of 0 to 2, and m1 represents an integer of 1 to 3;
• and
• R represents a ring selected from a monovalent benzene ring, a monovalent naphthalene ring, a monovalent biphenyl ring, a monovalent furan ring, a monovalent pyrrole ring and a monovalent alicyclic hydrocarbon having 5 to 8 carbon atoms, or a group in which the same or different two to six rings selected therefrom are bonded through a bonding group B, wherein a hydrogen atom bonded thereto may be each independently replaced with —COOR0 wherein R0 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, —NO2, —CN, —CH═C(CN)2, —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyloxy group having 1 to 5 carbon atoms, a hydroxy group, or an alkoxy group having 1 to 6 carbon atoms.

A method for manufacturing a display element, comprising:

• [I] filling a photoreactive liquid crystal composition comprising
• (A) a photoreactive polymer liquid crystal having a photoreactive side chain, which reacts by at least one reaction selected from the group consisting of (A-1) photocrosslinking and (A-2) photoisomerization, and
• (B) a low molecular liquid crystal
• into a space formed between two transparent substrates disposed in parallel and apart from each other, to form a liquid crystal cell;
• and
• [II] irradiating the liquid crystal cell with a polarized ultraviolet ray from one of the two transparent substrates,
• to form the display element having a predetermined orientation of the (B) low molecular liquid crystal in the liquid crystal cell,
• wherein the (A) photoreactive polymer liquid crystal comprises any one photoreactive side chain selected from the group consisting of the following formulae (11) to (13):
• wherein A independently represents a single bond, —O—, —CH2—, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO—O—, or —O—CO—CH═CH—;
• B represents —O—, —CH2—, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO—O—, or —O—CO—CH═CH—;
• X represents a single bond, —COO—, —OCO—, —N═N—, —CH═CH—, —C≡C—, —CH═CH—CO—O—, or —O—CO—CH═CH—, and in a case where the number of X is 2, these Xs may be the same or different;
• l represents an integer of 1 to 12, m represents an integer of 0 to 2, and m1 represents an integer of 1 to 3;
• and
• R represents a ring selected from a monovalent benzene ring, a monovalent naphthalene ring, a monovalent biphenyl ring, a monovalent furan ring, a monovalent pyrrole ring and a monovalent alicyclic hydrocarbon having 5 to 8 carbon atoms, or a group in which the same or different two to six rings selected therefrom are bonded through a bonding group B, wherein a hydrogen atom bonded thereto may be each independently replaced with —COOR0 wherein R0 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, —NO2, —CN, —CH═C(CN)2, —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyloxy group having 1 to 5 carbon atoms, a hydroxy group, or an alkoxy group having 1 to 6 carbon atoms.