Pigment preparation, a process for its preparation and its use

US5199985A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Manfred Schneider · Lichtenfels, DE
• Rainer Schunck · Bad Soden am Taunus, DE

Key dates

• Filing date: Nov 12, 1991
• Grant date: Apr 6, 1993
• Expiry date: Nov 12, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B11/12
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to readily dispersible pigment preparations having good tinctorial strength based on an arylpararosanilinesulfonic acid pigment of the formula ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 independently of one another are hydrogen, chlorine or bromine or an alkyl or alkoxy group, each having 1 to 3 carbon atoms, and at least one liquid alcohol having a chain length of C.sub.8 to C.sub.20, preferably C.sub.10 -C.sub.15, which has been modified with 2 to 8 mol, preferably 3-6 mol, of propylene oxide and with 1-14 mol, preferably 3-10 mol, of ethylene oxide. The invention furthermore relates to a process for the preparation of these pigment preparations and their use, in particular in printing inks, copying papers or typewriter ribbons.