Photo-alignment copolymer, photo-alignment film, and optical laminate

A photo-alignment copolymer comprising:

• a repeating unit A including a photo-alignment group represented by Formula (1);
• and
• a repeating unit B including a crosslinkable group represented by Formula (2),
• in Formula (1), R1 represents a hydrogen atom or a methyl group, 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,
• in Formula (2), R7 represents a hydrogen atom or a methyl group,
• L1 in Formula (1) and L2 in Formula (2) each independently represent a divalent linking group formed by combining at least two or more groups selected from the group consisting of a linear, branched, or cyclic alkylene group having 1 to 10 carbon atoms and optionally having a substituent A, an arylene group having 6 to 12 carbon atoms and optionally having a substituent B, an ether group, a carbonyl group, and an imino group optionally having a substituent C, and
• the substituent A is at least one substituent selected from the group consisting of a halogen atom, an alkyl group, and an alkoxy group, the substituent B is at least one substituent selected from the group consisting of a halogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, a cyano group, a carbonyl group, and an alkoxycarbonyl group, and the substituent C is at least one substituent selected from the group consisting of an alkyl group and an aryl group.