Isoindoline pigment having a high color strength

US4599113A · kind A · utility

Assignee

• BASF SE

Inventors

• Wolfgang Lotsch · Beindersheim, DE
• Georg Henning · Ludwigshafen, DE

Key dates

• Filing date: Jul 26, 1984
• Grant date: Jul 8, 1986
• Expiry date: Jul 26, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B57/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A pigmentary form of isoindoline pigments which has high color strength is obtained if these pigments contain PA0 (a) a compound of the formula (I) ##STR1## and (b) one or more isoindoline compounds of the formula (II) ##STR2## and the pigment is obtained by dry-blending (I) and (II) until the primary particles are .ltoreq.0.2 .mu.m and then heating the finished mill base in an organic liquid or in a mixture of water and an organic liquid. In the formulae, X is ##STR3## and R.sup.2 is --CN, --CONHR.sup.4, 2-quinazolonyl, 2-quinoxazolonyl or 2-benzimidazolyl, R.sup.3 is hydrogen, alkyl or unsubstituted or substituted phenyl, R.sup.1 is hydrogen or methyl, and R.sup.4 is hydrogen, alkyl or phenyl, and the phenyl radical and/or the heterocyclic radicals can be further substituted. The compounds I and II differ from one another. The color strengths of the resulting pigments are substantially superior to the prior art.