Method of producing water-soluble nonturbid copolymers of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer

US7442751B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Rainer Dobrawa · Stuttgart, DE
• Ralf Widmaier · Mannheim, DE
• Eberhard Schupp · Schwetzingen, DE
• Klaus Schnell · Neustadt, DE
• Karl-Hermann Strube · Speyer, DE

Key dates

• Filing date: Dec 22, 2006
• Grant date: Oct 28, 2008
• Expiry date: Dec 22, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F216/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Method of producing vinyllactam copolymers by free-radical polymerization of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer in an organic solvent in the presence of an initiator under reflux conditions, where N-vinyllactam is added to the reflux.