Azo compound, azo pigment, pigment dispersion, coloring composition, ink for inkjet recording, coloring composition for color filter, color filter, and process for preparing a coloring composition for color filter
US8226734B2 · kind B2 · utility
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22Claims
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Key dates
| Filing date | Jul 17, 2009 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Jul 17, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/32
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An azo pigment and pigment dispersion show excellent coloring characteristics and light fastness. The azo pigment is represented by general formula (1), its tautomer, a salt or hydrate thereof:wherein G is hydrogen or an aliphatic, aryl, heterocyclic, acyl, aliphatic oxycarbonyl, carbamoyl, or sulfonyl group, R1 is an amino, aliphatic oxy, aliphatic, aryl, or heterocyclic group, R2 is a substituent, A is an aromatic 5- or 6-membered heterocyclic group, m is an integer of 0 to 5, n is an integer of 1 to 4 and, when n=2, 3 or 4, the formula represents a dimer, trimer, or tetramer, respectively, formed through R1, R2, A, or G.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.