| abstract |
A pigmented phase change ink composition comprising an ink vehicle, a dispersant, and pigment particles wherein the dispersant is a chemical compound of formula: (see above formula) wherein R1 is an alkyl group, aryl group, alkylaryl group or arylalkyl group with at least 23 carbon atoms, R2 is an alkylene group, arylene group, alkyarylene group or arylalkylene group with at least 2 carbons and X is a quaternary ammonium salt. The ink can be resistant to substantial aggregation and settling of the pigment particles in the melt and even when exposed to freeze thaw cycles. |