| abstract |
The polymeric dispersant is a copolymer obtainable by copolymerizing at least a first monomer chosen from a maleimide compound and maleic anhydride, and a second monomer being an ethylenically unsaturated monomer and in case of maleic anhydride, conversion of resulting maleic anhydride units to N-substituted maleimide units, wherein the first monomer comprises a first substituent having a substantially non-polar chain and wherein the second monomer comprises a second, more polar substituent. In one embodiment of the copolymerisation method, first and second monomers are used with copolymerisation parameters r1 , r2 , such that r1 and r2 ≤ 0.5. This results in an at least moderately alternating copolymer. The conversion of maleic anhydride units to maleimide may be partial, for instance at least 10%. The polymeric dispersant can be used in an ink dispersion further comprising colorant particles and an aqueous and/or alcoholic carrier liquid. |