Oil-soluble, phenolic resin-modified natural resinic acid esters, processes for their preparation and their use as self-gelling printing ink resins

US5405932A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Albert Bender · Mainz, DE
• Walter Hilker · Taunusstein, DE
• Lothar Bothe · Mainz, DE

Key dates

• Filing date: Jan 21, 1994
• Grant date: Apr 11, 1995
• Expiry date: Jan 21, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G8/28
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Oil-soluble, phenolic resin-modified natural resinic acid esters, which are able to form self-gelling mineral oil solutions and in the form of gel varnishes can advantageously be used as binder resins in printing inks for offset printing and letterpress printing, and also processes for their preparation from natural resins, phenols, aldehydes, condensation catalyst, esterifying agents and modifiers by reaction of the components at temperatures in the range from 80.degree. to 300.degree. C., individual components preferably being initially introduced and the other components being metered in, the combined use of a magnesium compound as condensation catalyst and the continuous removal of the water of reaction during the condensation reaction by azeotropic distillation with co-use of an inert organic solvent as distillative entraining agent being necessary and decisive for the self-gelling property of the process product.