Polymeric ethylene oxide/propylene oxide or ethylene oxide/butylene oxide ether carboxylic acids, a process for their preparation and their use

US4436933A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Helmut Diery · Kelkheim, DE
• Norbert Wester · Hofheim, DE

Key dates

• Filing date: Aug 31, 1982
• Grant date: Mar 13, 1984
• Expiry date: Aug 31, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/911
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polymeric ethylene oxide/propylene oxide or ethylene oxide/butylene oxide ether carboxylic acids of the formula ##STR1## wherein R denotes methyl or ethyl, preferably methyl, A denotes hydrogen or a metal cation, preferably Na.sup.(+) or K.sup.(+), X and Z together denote a number from 2 to 360, preferably from 2 to 140, y denotes a number from 15 to 70, preferably from 25 to 70 and n denotes a number from 1 to 10, a process for their preparation and their use as surfactants.