Monoazo pigments derived from aminophthalimides and substituted acetoacetarylides or 2-hydroxy-3-naphthoylarylides
US4473500A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1982 |
| Grant date | Sep 25, 1984 |
| Priority date | — |
| Expiry date | May 3, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B29/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Monoazo pigment compounds of the formula ##STR1## wherein X is a group of the formula ##STR2## R is hydrogen or methyl, R.sub.1 and R.sub.2 are hydrogen, chlorine, methyl or methoxy, Y is methyl or phenyl, or Y is --O, --S--, --N(R.sub.3)-- or --C(R.sub.4).dbd.CH--, each of which is bound on the ring A in the ortho-position with respect to the --NHCO-- group to form a benzoxazolone, benzothiazolone, benzimidazolone or quinolone-2, with R.sub.3 and R.sub.4 being hydrogen or methyl, and m and n independently of one another are each 1 or 2, are useful as high-grade pigments, for pigmenting high-molecular weight organic material. The pigments are distinguished in particular by good fastness to light, migration and weather.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.