Surface-treated organic pigment and process for the production thereof
US5928419A · kind A · utility
83Cited by
8References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 6, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Oct 6, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0033
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A surface-treated organic pigment excellent in initial dispersibility and long-term dispersion stability in water and an organic solvent and free from the coagulation of pigment particles, obtained by reacting a sulfonating agent with an organic pigment dispersed in a solvent in which the organic pigment is insoluble or sparingly soluble, and thereby introducing a sulfonic acid group to the surface of each particle of the organic pigment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.