Preparation of water-soluble copolymers of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer

US6103820A · kind A · utility

Assignee

• BASF SE

Inventors

• Rainer Blankenburg · Kornwestheim, DE
• Stephan Kothrade · Schifferstadt, DE
• Axel Sanner · Bischofswerda, DE

Key dates

• Filing date: Feb 25, 1997
• Grant date: Aug 15, 2000
• Expiry date: Feb 25, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F226/06
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The present invention relates to a novel process for preparing water-soluble copolymers of at least one water-soluble N-vinyllactam of the formula I ##STR1## where n=1 or 2, and at least one hydrophobic comonomer having a water-solubility of 1 to 85 g/l, by free-radical polymerization in aqueous solution.