Process for the preparation of pigment preparations of the anthanthrone series

US5071483A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Erwin Dietz · Kelkheim, DE
• Manfred Urban · Wiesbaden, DE
• Siegfried Schiessler · Frankfurt am Main, DE

Key dates

• Filing date: Sep 19, 1989
• Grant date: Dec 10, 1991
• Expiry date: Sep 19, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B67/0033
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of pigment preparations of the anthanthrone series, which comprises subjecting anthanthrone crude pigments to aqueous pearl milling in the presence of dispersants of the formulae EQU Q.sub.1 -[A.sub.1 -X].sub.n (I) and/or EQU [Q.sub.2 -A.sub.2 ].sub.z -Y (II) in which in formula (I) Q.sub.1 is the radical of an anthanthrone, azo, isoindolinone, diketopyrrolopyrrole or perinone compound, A.sub.1 is a direct bond or --O--, --S--, --NR.sub.3, --CO--, --SO.sub.2 --, --CR.sub.4 R.sub.5 -- or arylene, X is a group ##STR1## or a heterocyclic radical having at least one nitrogen atom, and R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 are hydrogen atoms or saturated or unsaturated alkyl groups and n is 1 to 4, and in formula (II) Q.sub.2 is a radical of the formula ##STR2## in which R.sub.1 is hydrogen, halogen, alkyl, alkoxy or cyano, or, in the case that m.sub.1 >1, R.sub.1 can also be a combination of these substituents, R.sub.2 is hydrogen, halogen, an alkyl, alkoxy or cyano or, in the case that m.sub.2 >1, R.sub.2 can also be a combination of these substituents, m.sub.1 and m.sub.2 are 1 to 4, A.sub.2 is --(CH.sub.2).sub.p --, CR.sub.8 R.sub.9 --, arylene…