Flushed pigments and method for making flushed pigments
US5820667A · kind A · utility
7Cited by
11References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1997 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Mar 27, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/001
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The specification discloses a method for treating a pigment presscake containing pigment and water to remove the water therefrom. The method is carried out by contacting the presscake with a flushing agent containing an uncatalyzed or acid catalyzed rosin ester and an ink oil to provide a mixture containing the pigment, the flushing agent and water which is then separated from the mixture by well known separation techniques such as decanting to provide a flushed pigment. The specification also discloses a flushing agent and an ink composition containing the uncatalyzed or acid catalyzed rosin ester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.