Water-soluble or water-dispersible graft polymers of proteins as leather tanning agents

US5714560A · kind A · utility

Assignee

• BASF SE

Inventors

• Walter Denzinger · Speyer, DE
• Axel Kistenmacher · Ludwigshafen, DE
• Heinrich Hartmann · Schifferstadt, DE
• Gunter Bernhardt · Ludwigshafen, DE
• Gerhard Wolf · Mannheim, DE

Key dates

• Filing date: Nov 13, 1996
• Grant date: Feb 3, 1998
• Expiry date: Nov 13, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C14C3/22
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Water-soluble or water-dispersible graft polymers which are obtainable by free-radical-initiated polymerization of (A) a monomer or monomer mixture comprising PA1 (a) from 20 to 100% by weight of acrylic acid or methacrylic acid or a mixture thereof or alkali metal, alkaline earth metal or ammonium salts thereof, PA1 (b) from 0 to 80% by weight of other monoethylenically unsaturated monomers which can be copolymerized with the monomers (a), and PA1 (c) from 0 to 5% by weight of monomers containing at least 2 ethylenically unsaturated, non-conjugated double bonds in the molecule, in the presence of proteins (B) in an A:B weight ratio of from (95 to 10):(5 to 90), are used as tanning agents for self-tanning, pretanning and assist tanning of pelts and skin pelts and for the retanning of leather and skin.