Inks comprising modified pigments and methods for making and using the same
US8163075B2 · kind B2 · utility
6Cited by
839References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2007 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Oct 31, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K9/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink composition that includes a self-dispersing pigment that has about 0.02 to about 1.0 mMoles of S and about 0.2 to about 2.0 mMoles of active hydrogen per gram of pigment, water, and an organic solvent. A method of making an ink composition that includes sulfonating a pigment, subsequently oxidizing the pigment to produce a modified pigment, and incorporating the modified pigment into an ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.