Dispersion
US6034156A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1997 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Nov 24, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0063
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The presently claimed process for the production of a solid pigment/resin dispersion comprises the steps of mixing together a particulate pigment, a solid resin carrier, a water-immiscible organic solvent in which the carrier is at least partially soluble, water, and, optionally, a water miscible solvent until the mixture separates into an aqueous phase and a coherent phase comprising resin, pigment and organic solvent; separating water from the coherent phase; and continuing to mix the coherent phase while removing the organic solvent under the action of heat and/or reduced pressure until a dry particulate material comprising a pigment and resin is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.