Aqueous solutions or dispersions of copolymers

US5914442A · kind A · utility

Assignee

• BASF SE

Inventors

• Hermann Birkhofer · Ludwigshafen, DE
• Michael Kneip · Ludwigshafen, DE
• Peter Danisch · Ludwigshafen, DE
• Walter Denzinger · Speyer, DE
• Axel Kistenmacher · Ludwigshafen, DE
• Heinrich Hartmann · Schifferstadt, DE

Key dates

• Filing date: Jul 25, 1996
• Grant date: Jun 22, 1999
• Expiry date: Jul 25, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C14C9/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aqueous solution or aqueous dispersion of copolymers suitable for the fatliquoring and filling of leather and fur skins are obtained by free-radical copolymerization of PA1 A.sup.1) C.sub.6 -C.sub.40 -monoolefins or C.sub.6 -C.sub.40 -alkyl vinyl ethers or mixtures thereof with PA1 B.sup.1) monoethylenically unsaturated C.sub.4 -C.sub.8 -dicarboxylic anhydrides or by free-radical copolymerization of PA1 A.sup.2) C.sub.6 -C.sub.40 -alkyl acrylates or methacrylates or vinyl esters of C.sub.6 -C.sub.40 -carboxylic acids or mixtures thereof with PA1 B.sup.2) monoethylenically unsaturated C.sub.3 -C.sub.12 -carboxylic acids, monoethylenically unsaturated C.sub.4 -C.sub.12 -dicarboxylic anhydrides, monoesters or monoamides of monoethylenically unsaturated C.sub.4 -C.sub.12 -dicarboxylic acids, amides of monoethylenically unsaturated C.sub.3 -C.sub.12 -carboxylic acids or mixtures thereof to give copolymers with molecular weights of 500 to 30,000, where the carboxyl groups which are present in aqueous medium are at least partially neutralized, and some of the carboxylic groups can be in amidated form, containing 0.5-40% by weight, based on the amount of copolymer, of defined emulsifiers.