US 11,914,248 B2
Photo-alignment copolymer, photo-alignment film, and optical laminate
Yutaka Nozoe, Kanagawa (JP); Takashi Iizumi, Kanagawa (JP); Kazushige Nakagawa, Kanagawa (JP); Takahiro Kato, Kanagawa (JP); Miho Asahi, Kanagawa (JP); Hirofumi Omura, Kanagawa (JP); and Yuki Hirai, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Nov. 8, 2020, as Appl. No. 17/092,316.
Application 17/092,316 is a continuation of application No. PCT/JP2019/020213, filed on May 22, 2019.
Claims priority of application No. 2018-100688 (JP), filed on May 25, 2018; application No. 2018-124970 (JP), filed on Jun. 29, 2018; and application No. 2018-196909 (JP), filed on Oct. 18, 2018.
Prior Publication US 2021/0063825 A1, Mar. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/1337 (2006.01); C08F 220/60 (2006.01); C08F 220/32 (2006.01); C08F 220/36 (2006.01); G02F 1/01 (2006.01); C08F 220/30 (2006.01); C08F 220/58 (2006.01); C08F 220/28 (2006.01)
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),

OG Complex Work Unit Chemistry
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),

OG Complex Work Unit Chemistry

OG Complex Work Unit Chemistry
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),

OG Complex Work Unit Chemistry
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.