Emulsion ink
US7396396B2 · kind B2 · utility
0Cited by
25References
18Claims
0Family size
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Key dates
| Filing date | Nov 10, 2004 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Aug 15, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/0235
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A water-in-oil emulsion ink comprises a water phase and an oil phase, wherein the water phase comprises a carbon black pigment having a pH of less than 8 dispersed therein by a water-soluble resin, and wherein the water phase also comprises a pH-adjusting agent to achieve a pH value for the water phase of 8 or greater. The ink maintains stable rheology on ageing, and provides a stable and consistent ink detection signal even after periods of non-use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.