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US 4,053,463 AGranted
Heterocyclic azo pigments
AssigneeBASF SE
InventorHelmut Junge
Life of this patent
Estimating the term…
Abstract
An azo pigment of the formula: ##STR1## in which R is hydrogen or methyl; R.sup.1 is cyano or carbamoyl; R.sup.2 is hydrogen, chloro, bromo, methyl, methoxy, ethoxy or cyano; R.sup.3 is hydrogen, chloro, bromo, methyl, methoxy, ethoxy, cyano, carbomethoxy, carbamoyl, sulfamoyl or methylsulfonyl; and 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.
Claims2
An azo compound of the formula:
- ##STR15## in which R is hydrogen or methyl;
- R.sup.1 is cyano or carbamoyl;
- R.sup.2 is hydrogen, bromo, chloro, methyl, methoxy, ethoxy or cyano;
- R.sup.3 is hydrogen, chloro, bromo, methyl, methoxy, ethoxy, cyano, carbomethoxy, carbamoyl, sulfamoyl or methylsulfonyl;
- and
- R.sup.4 is hydrogen, chloro, bromo, methyl, methoxy or carbomethoxy.
3 more elements
Dependencies are inferred from the claim text.