Process for producing highly chlorinated copper phthalocyanine
US4330470A · kind A · utility
1Cited by
3References
6Claims
0Family size
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Key dates
| Filing date | Dec 18, 1980 |
| Grant date | May 18, 1982 |
| Priority date | — |
| Expiry date | Dec 18, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B47/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A highly chlorinated copper phthalocyanine is produced by chlorinating a copper phthalocyanine in the presence of a catalyst for chlorination in a solvent by charging chlorine under an elevated pressure. The chlorination is carried out in an inert organic solvent incorporating chlorosulfonic acid and/or pyrosulfuryl chloride at a ratio of 1 to 30 wt. % based on said inert organic solvent which maintain dispersibility of said resulting highly chlorinated copper phthalocyanine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.