Indandione bis-azomethine pigments

Abstract

An indandione pigment having high tinting strength and good weatherability and light fastness of the formula ##STR1## WHEREIN A is a phenylene or naphthylene group optionally substituted by a halogen atom, a lower alkyl group, a lower alkoxy group or a nitro group; n is 2 or 1; and B represents a direct bond or an n valont aromatic radical. The pigment mentioned above can be prepared by reacting an indandione derivative of the formula ##STR2## (E is an alkoxy group with 1 to 3 carbon atoms, or an amino group; and G is an oxygen atom, or ##STR3## in which Q is a lower alkyl group, and Q.sub.2 is a lower alkyl group or a phenyl group) with an amino compound of the formula H.sub.2 N--B--NH.sub.2 ]n-1.

Dependencies are inferred from the claim text.