Disclosed herein are inkjet ink compositions comprising a polymer comprising the repeat units (A), (B), and (C), wherein: (A) is selected from —N+(R1)(R2)— and —N(R1)—; (B) is selected from C1-C10 alkylene; C3-C20 cycloalkylene; C3-C20 heterocycloalkylene; arylene; heteroarylene; C2-C20 ether; C2-C20 thioether; C2-C20 ester; C2-C20 acetal; C2-C20 amide; bisphenols; and oligomer and polymer moieties selected from polyether, polyester, polyamines, polycarbonate, polyacetal, polythioether, polyester amide, polyurethane, polyacrylate, polyolefin, and polyalkylsiloxane, and (C) comprises at least one group selected from: (i) —C(R3) (R4)—C(R5)(OH)—(C(R6)(R7))m-, (ii) —C(R3)(R4)—C(R5)(H)—C(O)—, and (iii) C(R3)(R4) C(R5)(H) S(O)(O); and (A) is bonded to the —C(R3)(R4)— group of (C), and (B) is bonded to (C).