Phthalone derivatives utilizable as pigments
US4256901A · kind A · utility
2Cited by
1References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 4, 1979 |
| Grant date | Mar 17, 1981 |
| Priority date | — |
| Expiry date | Jan 4, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B57/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Phthalones derived from benzimidazole can be represented by one of the following general formulas: ##STR1## in which A.sub.1 and A.sub.2 each represents an aliphatic, alicyclic, aromatic or heterocyclic radical, possibly substituted by one or more nonsolubilizing substituents, and each of the benzene nuclei B.sub.1 and B.sub.2 can bear one or two substituents selected from halogen atoms and the lower alkyl, lower alkoxy, nitro, acylamino and aryl groups or be coupled with another benzene nucleus. These phthalones are valuable pigments for textile printing and for coloring inks, lacquers, paints, varnishes and plastic materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.