CPC G02F 1/133711 (2013.01) [C08F 220/30 (2013.01); C08F 220/32 (2013.01); C08F 220/325 (2020.02); C08F 220/36 (2013.01); C08F 220/365 (2020.02); C08F 220/58 (2013.01); C08F 220/603 (2020.02); G02F 1/0136 (2013.01); G02F 1/13378 (2013.01); C08F 220/281 (2020.02); C09K 2323/02 (2020.08); G02F 2202/022 (2013.01)] | 15 Claims |
1. A photo-alignment copolymer comprising:
a repeating unit A including a photo-alignment group represented by Formula (A); and
a repeating unit B including a crosslinkable group represented by Formula (B),
in Formula (A), R1 represents a hydrogen atom or a methyl group, L1 is a divalent linking group represented by any one of Formulae (1) to (10),
in Formulae (1) to (10), *1 represents the bonding position with the carbon atom constituting the main chain in Formula (A), and *2 represents the bonding position with the carbon atom constituting the carbonyl group in Formula (A), R2, R3, R4, R5, and R6 each independently represent a hydrogen atom or a substituent, and among R2, R3, R4, R5, and R6, two adjacent groups may be bonded to form a ring, and
in Formula (B), R7 represents a hydrogen atom or a methyl group, L2 represents a divalent linking group, and X represents a crosslinkable group,
wherein X in Formula (B) is at least one crosslinkable group selected from the group consisting of Formulae (X1) to (X4),
in Formulae (X1) to (X4), * represents the bonding position with L2 in Formula (B), R8 represents any one of a hydrogen atom, a methyl group, or an ethyl group, and S in Formula (X4) represents any one of a vinyl group, an allyl group, a styryl group, an acryloyl group, and a methacryloyl group, and
wherein the photo-alignment copolymer has a weight-average molecular weight of 10.000 to 500 000.
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