Process for preparing an alpha or beta form copper phthalocyanine pigment
US4104277A · kind A · utility
10Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 15, 1977 |
| Grant date | Aug 1, 1978 |
| Priority date | — |
| Expiry date | Feb 15, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/909
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for preparing an alpha or beta form copper phthalocyanine pigment which comprises dry milling a crude copper phthalocyanine followed by mixing with an aqueous emulsion comprising a liquid amine having from 3 to 20 carbon atoms which is insoluble in water or alkali and soluble in acid and a surfactant which is capable of emulsifying the liquid amine and subsequently acidifying the mixture to dissolve the amine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.