Methods of producing water-soluble, non-turbid copolymers of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer

US7629425B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Rainer Dobrawa · Stuttgart, DE
• Ralf Widmaier · Mannheim, DE
• Klaus Schnell · Neustadt, DE
• Karl-Hermann Strube · Speyer, DE
• Jurgen Nieberle · Monsheim, DE
• Reinhold Dieing · Schifferstadt, DE
• Bernd de Potzolli · Bad Dürkheim, DE
• Andreas Gruber · Altrip, DE
• Ulrich Filges · Schifferstadt, DE
• Martin Meister · Bocholt, DE
• Josef Neutzner · Neustadt, DE
• Wolfgang Bouquet · Deidesheim, DE
• Eberhard Schupp · Schwetzingen, DE

Key dates

• Filing date: Nov 29, 2007
• Grant date: Dec 8, 2009
• Expiry date: Nov 29, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Methods of producing vinyllactam copolymers which include: providing at least one water-soluble N-vinyllactam; providing at least one hydrophobic comonomer; and subjecting the at least one water-soluble N-vinyllactam and the at least one hydrophobic comonomer to free-radical polymerization in an organic solvent in the presence of an initiator, under a combination of process measures selected from the group consisting of A and B; wherein: