US 11,994,827 B2
Photoresponsive polymer
Kouji Sugama, Musashino (JP); Yukiko Nakai, Toyohashi (JP); Kazuaki Nakamura, Hino (JP); and Toyoko Shibata, Tokyo (JP)
Assigned to KONICA MINOLTA, INC., Tokyo (JP)
Filed by Konica Minolta, Inc., Tokyo (JP)
Filed on Apr. 8, 2022, as Appl. No. 17/658,563.
Claims priority of application No. 2021-078064 (JP), filed on Apr. 30, 2021.
Prior Publication US 2022/0373913 A1, Nov. 24, 2022
Int. Cl. G03G 9/087 (2006.01); C08F 26/06 (2006.01); C08F 293/00 (2006.01); G03G 15/04 (2006.01)
CPC G03G 9/08788 (2013.01) [C08F 26/06 (2013.01); C08F 293/005 (2013.01); G03G 9/0874 (2013.01); G03G 15/04 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A photoresponsive polymer comprising a structural unit represented by the following general formula (2), fluidized by light irradiation, and reversibly non-fluidized:

OG Complex Work Unit Chemistry
wherein,
r1 represents a hydrogen atom or a methyl group, and
A is represented by any one of the following general formulas (1-1) to (1-4):
*—R1—Z1═Z2—R2  General formula (1-1)
*-G-R1—Z1═Z2—R2  General formula (1-2)
*—R2—Z2═Z1—R1  General formula (1-3)
*-G-R2—Z2═Z1—R1  General formula (1-4)
in which
* represents a bonding point, G represents a divalent group, and Z1 and Z2 each represent CH or N,
Z1≠Z2,
R1 represents an aromatic hydrocarbon group having a substituent Ra selected from the group consisting of an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, and a fluorine atom, at each of two ortho positions with respect to Z1, and
R2 represents a 5-member aromatic heterocyclic ring or a fused indole ring, with or without a substituent that is an alkyl group having 1 to 12 carbon atoms.