Composition and preparation of a dry predispersed coated pigment
US4007051A · kind A · utility
2Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1976 |
| Grant date | Feb 8, 1977 |
| Priority date | — |
| Expiry date | Feb 9, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A dry predispersed coated pigment, immediately suitable for mixing in an ink system without milling, is prepared by PA1 A. mixing at least 90 parts of a pigment (e.g. carbon black) and not more than about 10 parts of a hydrocarbon natural fossil resin, solvent-extracted from coal, PA1 B. fusing the mixture, PA1 C. milling the mixture to obtain the approximate particle size distribution of the original pigment, and PA1 D. densifying or beading the mixture. The product having this composition and prepared by this process is a dry pigment suitable for simple mixing with an ink system to give a ready-to-use printing ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.