BLACK PERYLENE PIGMENTS

摘要

Disclosed are black perylene pigments containing one of the isomers of formula (Ia) or (Ib), wherein the variables have the following meaning: R<1>, R<2> independently represent phenylene, naphthylene, or pyridylene, each of which can be monosubstituted or polysubstituted by C1-C12 alkyl, C1-C6 alkoxy, hydroxy, nitro, and/or halogen; X represents halogen; n represents 0 to 4. The inventive black perylene pigments alternatively contain a mixture of both isomers and are provided with a black number >= 210 in an alkyd/melamine baking enamel.