Graft copolymers of unsaturated monomers and polyhydroxy compounds, a process for their production and their use

US5760154A · kind A · utility

Assignee

• Stockhausen GmbH & Co. KG · DE

Inventors

• Frank Krause · Kleve, DE
• Helmut Klimmek · Krefeld, DE

Key dates

• Filing date: Feb 28, 1995
• Grant date: Jun 2, 1998
• Expiry date: Feb 28, 2015

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06P1/525
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to water-soluble, acid groups-containing graft copolymers which are at least partially biodegradable and are based on polyhydroxy compounds and monoethylenically unsaturated carboxylic acids, sulfonic acids and/or phosphonic acids or the salts of said acids as well as optional further monomers. The present invention further relates to a process for producing said graft copolymers at temperatures of up to 200.degree. C. by means of radical polymerization initiators, in that a total mixture is polymerized which consists of 1-60%-wt. of polyhydroxy compounds, their derivatives or their mixtures, and 95-40%-wt. of a monomer mixture comprising at least one monoethylenically unsaturated carboxylic acid, at least one monoethylenically unsaturated sulfonic acid, one monoethylenically unsaturated sulfuric acid ester and/or vinylphosphonic acid or the salts of said acids with monovalent cations, as well as optional further monomers. The present invention further relates to the use of the graft copolymers in aqueous systems, for binding multivalent metal ions, inhibiting the water hardness, as additive in detergents and cleaning agents, as textile auxiliary, disp…