Polymeric organic acids, their preparation and their use in detergents and cleansers

US4914167A · kind A · utility

Assignee

• BASF SE

Inventors

• Juergen Hambrecht · Heidelberg, DE
• Heinrich Hartmann · Schifferstadt, DE
• Walter Denzinger · Speyer, DE
• Albert Hettche · Heßheim, DE
• Wolfgang Trieselt · Ludwigshafen, DE
• Rolf Schneider · Burgstetten, DE

Key dates

• Filing date: Jul 8, 1985
• Grant date: Apr 3, 1990
• Expiry date: Jul 8, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Organic polyacids are prepared from monomeric monofunctional acids, such as acrylic acid or methacrylic acid and monomers without an acid group, with or without dicarboxylic acids or their anhydrides, by continuous free radical mass copolymerization under superatmospheric pressure at from 200.degree. to 400.degree. C., followed, if desired, by neutralization of the polyacids obtained. The polyacids obtained by the novel process are useful as phosphate substitutes and scale inhibitors in detergents and cleansers.