Heterocyclic azo pigments
US4053463A · kind A · utility
2Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1976 |
| Grant date | Oct 11, 1977 |
| Priority date | — |
| Expiry date | Jun 25, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B29/0029
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An azo pigment of the formula: ##STR1## in which R is hydrogen or methyl; PA1 R.sup.1 is cyano or carbamoyl; PA1 R.sup.2 is hydrogen, chloro, bromo, methyl, methoxy, ethoxy or cyano; PA1 R.sup.3 is hydrogen, chloro, bromo, methyl, methoxy, ethoxy, cyano, carbomethoxy, carbamoyl, sulfamoyl or methylsulfonyl; and PA1 R.sup.4 is hydrogen, chloro, bromo, methyl, methoxy or carbomethoxy. The compounds are eminently suitable as pigments in printing inks, surface coatings or plastics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.