Phase change inks with isocyanate-derived antioxidants and UV stabilizers

An ink composition according to claim. 7 wherein the phase change ink carrier comprises (a) stearyl stearamide, (b) a dimer acid based tetra-amide that is the reaction product of dimer acid, ethylene diamine, and a carboxylic acid having at least about 36 carbon atoms, or (c) mixtures thereof.

A compound comprising the reaction product of (i) a diisocyanate, (ii) an antioxidant or UV stabilizer molecule having thereon (A) at least one isocyanate-reactive hydroxyl group and/or (B) at least one isocyanate-reactive primary or secondary amino group, and (iii) a chromophore having thereon (A) at least one isocyanate-reactive hydroxyl group and/or (B) at least one isocyanate-reactive primary or secondary amino group.

A process which comprises (1) incorporating into an ink jet printing apparatus a phase change ink composition comprising (a) a colorant and (b) the reaction product of (i) an isocyanate and (ii) an antioxidant or UV stabilizer molecule having thereon (A) at least one isocyanate-reactive hydroxyl group and/or (B) at least one isocyanate-reactive primary or secondary amino group;

• (2) melting the ink;
• and (3) causing droplets of the melted ink to be ejected in an imagewise pattern onto a substrate.