Black coloring agent
US3992218A · kind A · utility
21Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 1975 |
| Grant date | Nov 16, 1976 |
| Priority date | — |
| Expiry date | May 2, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/19
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A carbon black coloring agent is obtained by (1) mixing a hydrophobic vehicle with an aqueous slurry containing a carbon black obtained by treating a furnace black having an electromicroscopic average particle size of from about 5 to about 35 m.mu. with a modifier selected from the group consisting of ozone, nitric acid, hydrogen peroxide, chromic acid and permanganate, and (2) removing the water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.