Solvent based inkjet ink composition
US10570301B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2017 |
| Grant date | Feb 25, 2020 |
| Priority date | — |
| Expiry date | Nov 30, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09C3/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Provided herein is an inkjet ink composition comprising an ink solvent, a binder, an additive, and a colorant comprising superparamagnetic or/and paramagnetic surface-modified iron oxide or/and iron hydroxide nanoparticles, wherein the nanoparticles are coated with a layer of silica-based coating or/and a layer of functional polymer. The superparamagnetic property of the nanoparticles ensures no magnetic attraction between the nanoparticles at room temperature, and good dispersion stability in the inkjet ink composition. The inkjet ink composition disclosed herein has excellent printing stability in terms of no flocculation and clogging of nozzle during inkjet printing and shows comparable printing stability with non-pigment ink. Printing on nonporous substrates with the inkjet ink composition disclosed herein has excellent transfer resistance. The inkjet ink composition disclosed herein allows color tuning of the ink through controlling the crystal structures of the nanoparticles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.