Process for production of polymer powders containing vinylformamide units

US8173757B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Dennis Loesch · Altrip, DE
• Volker Seidl · Mannheim, DE
• Martin Ruebenacker · Altrip, DE

Key dates

• Filing date: Oct 27, 2006
• Grant date: May 8, 2012
• Expiry date: Feb 11, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F226/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing a polymer powder comprising vinylformamide units by free radical polymerization of an aqueous solution of N-vinylformamide and if appropriate other monomers and drying the polymer which comprises an aqueous monomer solution comprising N-vinylformamide and at least one polymerization initiator being spray dispensed as an aerosol or dropletized at the top of a heatable tower-shaped reactor, then polymerizing the aerosol or droplets in an inert gas atmosphere to form a finely divided solid and discharging the finely divided polymer from the reactor.