ISOINDOLINE PIGMENTS HAVING A STRONG COLOURING CAPACITY, THEIR PREPARATION AND THEIR USE

摘要

1. An isoindoline pigment having high color strength and containing (a) a compound of the formula see diagramm : EP0132818,P20,F1 where X is see diagramm : EP0132818,P20,F2 or see diagramm : EP0132818,P20,F3 and R**1 is hydrogen or methyl, and (b) from 2 to 50% by weight, based on (a), of one or more isoindoline compounds of the formula see diagramm : EP0132818,P20,F4 where R**2 is -CN, -CONH2 , N-C1 -C4 -alkylcarbamyl, N-phenylcarbamyl, 2-quinazolonyl, 2-quinoxazolonyl or 2-benzimidazolyl, R**3 is hydrogen or C1 -C4 -alkyl or is phenyl which is unsubstituted or substituted by chlorine, bromine, methyl, ethyl, methoxy or ethoxy, and the phenyl radical in the phenylcarbamyl and/or the heterocyclic radicals specified for R**2 are unsubstituted or substituted by chlorine, fluorine, bromine, carbamyl, N-C1 -C4 -alkylcarbamyl, N-phenylcarbamyl, C1 -C4 -alkyl, C1 -C4 -alkoxy, benzoylamino, C1 -C4 -alkanoylamino, C1 -C4 -alkoxycarbonyl or phenoxycarbonyl, and when X in component (a) is see diagramm : EP0132818,P20,F5 or see diagramm : EP0132818,P20,F6 R**3 cannot be hydrogen, the pigment being obtained either by dry-milling a mixture of (I) and (II) until the primary particles are = 0.2 mu m, and then heating the finely divided agglomerated ground material in an organic liquid or in a mixture of water and an organic liquid, or by synthesis of (I) in the presence of finely divided (II) in aqueous medium, or by heating a mixture of the finely divided pigments (I) and (II) in aqueous medium after having optionally subjected it beforehand to the action of shearing forces.