Trisazo pigments containing two barbituric acid coupling components
US4093613A · kind A · utility
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Key dates
| Filing date | Jul 19, 1976 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | Jul 19, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3462
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Azo pigments of the formula ##STR1## in which R.sub.1 and R.sub.2 denote H atoms, alkyl groups with 1-6 C atoms or aryl radicals, Y denotes an O or S atom or an imino group, Z denotes an O atom or an imino group and Y.sub.1 -Y.sub.4 denote H or halogen atoms, alkyl or alkoxy groups containing 1-4 C atoms, or nitro, trifluoromethyl or alkoxycarbonyl groups containing 2-4 C atoms are valuable pigments coloring plastics, melts, spinning solutions, lacquers paints and printing inks in yellow to red shades of high tinctorial strength and excellent fastness properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.