Water-soluble or water-dispersible graft copolymers, the preparation thereof and the use thereof

US5658993A · kind A · utility

Assignee

• BASF SE

Inventors

• Walter Denzinger · Speyer, DE
• Axel Kistenmacher · Ludwigshafen, DE
• Johannes Perner · Neustadt, DE
• Angelika Funhoff · Schriesheim, DE
• Birgit Potthoff-Karl · Weinheim, DE
• Hans-Jurgen Raubenheimer · Ketsch, DE

Key dates

• Filing date: Jan 30, 1996
• Grant date: Aug 19, 1997
• Expiry date: Jan 30, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/3788
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A water-soluble or water-dispersible graft copolymer obtainable by free-radical graft copolymerization of PA0 (I) at least one monoethylenically unsaturated monomer onto PA0 (II) polymers with a molecular weight of 200-5000 of monoethylenically unsaturated dicarboxylic acids or anhydrides thereof using from 5 to 2,000 parts by weight of the monomers (I) per 100 parts by weight of grafting base, a process for preparing the graft copolymers and the use of the graft copolymers as additive to phosphate-free or reduced phosphate textile detergents, as dispersants and preventers of deposits in cleaners for hard surfaces and as water-treatment agents for reducing the deposition of scale and the separation out of water hardness in water-conveying systems.