Stabilisation of aqueous solutions of homopolymers and copolymers of N-vinylpyrrolidones

US7666935B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Erik Bohrer · Frankenthal (Pfalz), DE
• Dieter Faul · Niederkirchen, DE
• Ivette Garcia Castro · Ludwigshafen, DE
• Norbert Gebhardt · Neustadt, DE
• Peter Hossel · Schifferstadt, DE
• Peter Mendera · Schifferstadt, DE
• Olga Pinneker · Heßheim, DE
• Bernd de Potzolli · Bad Dürkheim, DE
• Stefan Stein · Saulheim, DE
• Karl-Hermann Strube · Speyer, DE
• Ralf Widmaier · Mannheim, DE
• Josef Neutzner · Neustadt, DE
• Simone Lehnert · Speyer, DE

Key dates

• Filing date: Oct 6, 2005
• Grant date: Feb 23, 2010
• Expiry date: Oct 6, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K3/014
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aqueous solutions comprising: one or more polymeric components selected from the group consisting of homopolymers of N-vinylpyrrolidone, copolymers of N-vinylpyrrolidone, and mixtures thereof; and hydrogen peroxide; wherein the hydrogen peroxide is present in an amount of 100 to 5000 ppm; and methods of stabilizing aqueous solutions containing one or more polymeric components selected from the group consisting of homopolymers of N-vinylpyrrolidone, copolymers of N-vinylpyrrolidone, and mixtures thereof.