Pastelike pigment formulations and preparation and use thereof

US5030283A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

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

Key dates

• Filing date: Jun 22, 1989
• Grant date: Jul 9, 1991
• Expiry date: Jun 22, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B67/0021
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to readily storable flushed pastes of pigments of the arylparaosanilinesulfonic acid series, consisting essentially of (a) up to 50% by weight of the pigment, in a binder combination of (b) natural resin esters based on unmodified or modified natural resins with monohydric or polyhydric C.sub.1 -C.sub.20 -alcohols, and (c) long-oily alkyd resins having an oil content of 60% to 90% by weight dissolved in high-boiling mineral oil. These formulations are prepared from aqueous presscakes of pigment (a) by flushing in the presence of the solution of a mixture of at least one natural resin ester (b) and at least one alkyd resin (c) in mineral oil (d) with elimination of water. The novel pigment formulations are used for producing printing inks for letterpress and offset printing.