	US 11,851,517 B2
	Polymer dispersant, colorant dispersion liquid, and ink composition
Toshihiro Otake, Chino (JP)
Assigned to SEIKO EPSON CORPORATION
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Jul. 29, 2020, as Appl. No. 16/941,634.
Claims priority of application No. 2019-139629 (JP), filed on Jul. 30, 2019.
Prior Publication US 2021/0032394 A1, Feb. 4, 2021
Int. Cl. C08F 293/00 (2006.01); C09D 11/107 (2014.01); C09D 11/326 (2014.01); C09K 23/32 (2022.01)

CPC C08F 293/00 (2013.01) [C09D 11/107 (2013.01); C09D 11/326 (2013.01); C09K 23/32 (2022.01)]

12 Claims

1. A polymer dispersant comprising:

a first block; and

a second block,

wherein the first block includes a structural unit derived from a first monomer having an imidazolium salt portion and a hydrophobic portion,

the second block includes a structural unit derived from a second monomer having an imidazolium salt portion and a hydrophilic portion, and

the hydrophobic portion of the first monomer contains an alkyl carboxylate group, a cycloalkyl carboxylate group, or an aryl carboxylate group.