Pigment dispersion, inkjet-ink using the pigment dispersion, image forming process, and image forming apparatus
US7798629B2 · kind B2 · utility
15Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2007 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Nov 20, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/324
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a pigment dispersion that contains a carbon black, a dispersing agent and water, wherein the carbon black is any one of a channel black and a gas black, the dispersing agent is a sodium naphthalenesulfonate formalin condensate, and the total content of a dimer, a trimer and a tetramer of naphthalenesulfonate in the sodium naphthalenesulfonate formalin condensate is 20% by weight to 80% by weight. The present invention also provides an inkjet ink using the pigment dispersion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.