Alkoxy group containing copolymers and their use in retanning leather

US5873908A · kind A · utility

Assignee

• Stockhausen GmbH & Co. KG · DE

Inventors

• Kurt Dahmen · Rheydt, DE
• Richard Mertens · Krefeld, DE
• Helmut Brehm · Krefeld, DE
• Horst Kilian · Krefeld, DE
• Jochen Houben · Kempen, DE
• Thomas Muller · Bad Homburg vor der Höhe, DE

Key dates

• Filing date: Oct 25, 1996
• Grant date: Feb 23, 1999
• Expiry date: Oct 25, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C14C3/28
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to alkoxy-groups-containing copolymers of a) 1 to 99%-wt. water soluble ethylenically unsaturated, acid-groups-containing monomers, b) 1 to 50%-wt. monomers having a polyalkoxy sequence and c) 0 to 60%-wt. water soluble monomers which are copolymerizable with a) and b); and to the use of said copolymers for retanning leathers previously tanned by a mineral or combined method. The leathers treated with the retanning agents according to the invention in particular stand out for an improved fullness and good grain tightness. The acid groups of monomers a) preferably are carboxyl groups.