Modified beta-quinacridone pigment
US4857646A · kind A · utility
35Cited by
2References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Aug 24, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0027
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A new beta quinacridone polytype having a magenta color and a distinct X-ray diffraction pattern, said new form preferably having an average particle size of about 0.2-0.8 .mu.m and being prepared by various wet milling or reflux procedures in alcohol-base systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.