Method of producing water-soluble nonturbid copolymers of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer by polymerization under increased pressure

US7847044B2 · 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
• Ulrich Filges · Schifferstadt, DE
• Jurgen Nieberle · Monsheim, DE
• Josef Neutzner · Neustadt, DE
• Reinhold Dieing · Schifferstadt, DE
• Andreas Gruber · Altrip, DE
• Wolfgang Bouquet · Deidesheim, DE

Key dates

• Filing date: Dec 21, 2006
• Grant date: Dec 7, 2010
• Expiry date: Dec 21, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F218/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Method of producing 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, where the polymerization is carried out under a gauge pressure such that evaporation of the components is avoided.