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.
具有高色力和良好耐候性和耐光性的
吲哚酮
颜料的
化学式为 ## STR1 ## 其中A是苯基或
萘基,可以选择性地被卤原子,低烷基,低烷氧基或硝基取代; n为2或1; B表示直接键或n价芳香基团。上述
颜料可以通过将
化学式 ## STR2 ## 的
吲哚酮衍
生物(其中E是具有1至3个碳原子的烷氧基或
氨基; G是氧原子或## STR3 ##,其中Q是低烷基,Q.sub.2是低烷基或苯基)与
化学式H.sub.2 N-B-NH.sub.2]n-1的
氨基化合物反应而制备。