Polyurethane dispersion-containing inkjet inks
AssigneeHewlett-Packard Development Company, L.P.
InventorSergiy Peleshanko
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Abstract
The present disclosure provides inks, ink sets, and method for manufacturing inkjet inks. The inkjet ink can comprise a colorant, a liquid vehicle, and a polyurethane dispersion comprising polyurethane particles dispersed in the liquid vehicle. The polyurethane particles can have a core-shell structure with a branched inner core structure, and wherein the core comprises an amine cross-linker in an amount of 0.1 wt % to 1 wt % and the shell comprises a polyol cross-linker in an amount of 0.5 wt % to 2 wt %.
Claims17
A polyurethane dispersion-containing inkjet ink, comprising:
- a colorant;
- a liquid vehicle;
- and
- a polyurethane dispersion comprising polyurethane particles dispersed in the liquid vehicle,
- wherein the polyurethane particles have a core-shell structure with a branched inner core structure, and wherein the core comprises an amine cross-linker in an amount of 0.1 wt % to 1 wt % and the shell comprises a polyol cross-linker in an amount of 0.5 wt % to 2 wt %.
A method of making a polyurethane dispersion, comprising:
- reacting an acid polyol, diisocyanate, diol, and amine cross-linker to produce a core polyurethane having inner cross-linking;
- and
- reacting the core polyurethane with a polyol and polyol cross-linker to produce a core-shell polyurethane particle having inner and outer cross-linking, thereby forming the polyurethane dispersion.
Dependencies are inferred from the claim text.