Manufacture of vinylpyrrolidone polymers

US4053696A · kind A · utility

Assignee

• BASF SE

Inventors

• Karl Herrle
• Hermann Gausepohl · Mutterstadt, DE
• Wolfgang Schwarz · Ludwigshafen, DE

Key dates

• Filing date: Nov 17, 1975
• Grant date: Oct 11, 1977
• Expiry date: Nov 17, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F26/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the continuous manufacture of vinylpyrrolidone polymers of low K values, wherein vinylpyrrolidone, with or without comonomers copolymerizable therewith, is polymerized in organic solvents at elevated temperatures and superatmospheric pressures in the presence of a source of free radicals.