Water-soluble polycondensates based on fatty acids, dialkanolamine and maleic anhydride, a process for their production, hydraulic compositions containing them and their use

US4880898A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Bernd Wahle · Kaarst, DE
• Hermann Anzinger · Goldkronach, DE
• Horst Ziche · Düsseldorf, DE
• Erhard Schinski · Erkrath, DE

Key dates

• Filing date: Dec 20, 1988
• Grant date: Nov 14, 1989
• Expiry date: Dec 20, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2103/30
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Water-soluble polycondensates of dialkanolamides, fatty acid diethylaminopolyglycolates and fatty acid diethyl ammonium alkyl polyglycolates, which are first reacted with maleic anhydride in a molar ratio of 1:0.5 to 1:2, followed by reaction of substantially all the olefinic double bonds in the .alpha.-position to carboxyl groups with sulfites, are excellent plasticizers for hydraulic compositions.