Process for converting premilled quinacridone to pigmentary form
US4094699A · kind A · utility
12Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 1, 1976 |
| Grant date | Jun 13, 1978 |
| Priority date | — |
| Expiry date | Dec 1, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0014
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Process for converting premilled quinacridone to pigmentary form by contacting the premilled quinacridone with an aqueous alkaline medium in the presence of at least one surfactant. The process eliminates the need for salt in the premilling operation and eliminates the use of organic liquids in the premilling or aftertreatment of the premilled quinacridone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.