Production process
US6306938A · kind A · utility
5Cited by
20References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Apr 19, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D7/41
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a process for the production of pigmentary copper phthalocyanine in the beta crystalline phase comprising: PA1 a) dry or aqueous milling of crude copper phthalocyanine in combination with a natural or chemically modified resin and, optionally, a grinding auxiliary followed by; PA1 b) isolation of the milled mass followed by; PA1 c) conditioning treatment of the milled mass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.