Patent ID: 8894194

Claim:
An ink-jet ink composition, comprising: a) a liquid vehicle; b) a colorant dispersed or dissolved in a liquid vehicle; and c) self cross-linkable latex particles dispersed in the liquid vehicle, the self cross-linkable latex particles comprising: i) at least one hydrophobic monomer, ii) at least one acidic monomer, and iii) at least one self cross-linkable monomer, the at least one self cross-linkable monomer including at least one keto group, and having the general formula: where R is H or CH 3 ; X is O or NH; Y is CH 2 OH or a ring structure containing at least one hetero atom; wherein the self cross-linkable latex particle has at least 0.1 wt % of the self cross-linkable monomer at the surface of the self cross-linkable latex particle providing cross-linking sites on the surface of the self cross-linkable latex particle, and wherein the self cross-linkable latex particles form an intra- and inter-particle cross-linked latex polymer film after printing the ink-jet ink on a substrate and upon at least partial depletion of the liquid vehicle or a liquid vehicle component.