Synthetic, monodispersed color pigments for the coloration of media such as printing inks, and method and apparatus for making same
US5344489A · kind A · utility
52Cited by
10References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1991 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Nov 15, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K9/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of making synthetic color pigments comprises synthesizing monodispersed colloidal core particles by precipitation from a solution and applying dye material to the core particles either by adsorption directly into the core particles or by adsorption or incorporation into alumina fixation shells at the surfaces of the core particles. Additional functional shells may be applied to the dyed core particles for various reasons. The pigments are useful for the coloration of various media such as printing inks and paint compositions.
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