Process for producing a charge control agent
US9056884B2 · kind B2 · utility
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3Claims
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Key dates
| Filing date | Mar 5, 2013 |
| Grant date | Jun 16, 2015 |
| Priority date | — |
| Expiry date | Mar 5, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B45/01
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing a charge control agent comprising an azo-based iron complex salt compound as an effective component, comprises: The ironization reaction of the monoazo compound is carried out while pH is kept at 7.0 to 8.0. Since the above azo-based iron complex salt compound having high purity can be obtained at a high yield, it can be used as a charge control agent directly and a special purification step can be eliminated, thereby making it possible to greatly cut the production cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.