Process for producing azo compounds, pigment dispersion, coloring composition, ink for inkjet recording, coloring composition for color filter, and color filter
US8454710B2 · kind B2 · utility
1Cited by
1References
14Claims
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Key dates
| Filing date | Jan 14, 2011 |
| Grant date | Jun 4, 2013 |
| Priority date | — |
| Expiry date | Jan 14, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/223
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
To provide a process for producing an azo pigment showing excellent coloring characteristics such as tinctorial strength and hue and showing excellent fastness such as light fastness and ozone fastness, an azo pigment dispersion, a coloring composition, and an ink for inkjet recording. process for producing, for example, an azo pigment represented by the general formula (9), which includes a step of preparing a solution containing a compound represented by the following general formula (7) and an acid, and a step of bringing the solution in contact with a diazonium salt (8) derived from a heterocyclic amine,
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.