Cationic pigments and aqueous compositions containing same
US6221143A · kind A · utility
57Cited by
18References
56Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2000 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Mar 10, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to cationic pigments having an organic group which comprises: a) at least one aromatic group, at least one C.sub.1 -.sub.20 alkyl group, or both; and b) at least one cationically charged ionic group, at least one cationically chargeable ionizable group or both, and a corresponding counter-anion. The cationic pigments of the present invention have been found useful in aqueous or solvent based compositions and particularly in ink compositions, especially ink jet ink compositions. A method for preparing the cationic pigments is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.