White inkjet inks
AssigneeMemjet Technology Limited
InventorsSimon Fielder, Ivan Johan
Life of this patent
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Abstract
A white inkjet ink includes: an aqueous-based ink vehicle and white pigment particles dispersed in the ink vehicle. The pigment particles are core-shell particles having a core comprised of polystyrene and a shell comprised of titania. Stable formulations producing good image quality include a first nonionic acetylenic surfactant having an HLB value in the range of 7 to 9 and a second nonionic acetylenic surfactant having an HLB value in the range of 12 to 14.
Claims20
A white inkjet ink comprising:
- an aqueous-based ink vehicle;
- and
- white pigment particles dispersed in the ink vehicle,
- wherein the pigment particles are core-shell particles having a core comprised of polystyrene and a shell comprised of titania.
A white pigment dispersion suitable for formulating an inkjet ink, the white pigment dispersion comprising core-shell particles having a core comprised of polystyrene and a shell comprised of titania, wherein the core-shell particles have an average particle size in the range of 500 to 900 nm.
A white inkjet ink comprising:
- an aqueous-based ink vehicle;
- and
- pigment particles having a titania outer surface dispersed in the ink vehicle,
- wherein the ink vehicle comprises a first nonionic acetylenic surfactant having an HLB value in the range of 7 to 9 and a second nonionic acetylenic surfactant having an HLB value in the range of 12 to 14.
Dependencies are inferred from the claim text.