Branched polyoxyalkylene copolyesters, a process for their preparation, and their use

US4885110A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Willibald Bose · Altötting, DE
• Manfred Hofinger · Altötting, DE
• Martin Hille · Liederbach, DE
• Roland Bohm · Altenberge, DE
• Friedrich Staiss · Wiesbaden, DE

Key dates

• Filing date: Nov 12, 1987
• Grant date: Dec 5, 1989
• Expiry date: Nov 12, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G33/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Branched polyoxyalkylene copolyesters are described which are prepared by esterifying an oxyalkylated primary fatty amine and an at least trihydric oxyalkylated alkanol or an oxyalkylated polyamine using a dicarboxylic acid or a dicarboxylic anhydride with polycondensation. The novel branched polyoxyalkylene copolyesters are used as demulsifiers for breaking crude oil emulsions.