Stable N-oxly radical assisted emulsion polymerization under pressure

US6696533B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Michael Fischer · Ludwigshafen, DE
• Bradley Ronald Morrison · Mannheim, DE
• Heinz Friedrich Sutoris · Bischofswerda, DE
• Yvon Durant · Lee, US

Key dates

• Filing date: Dec 27, 1999
• Grant date: Feb 24, 2004
• Expiry date: Dec 27, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F4/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process of free-radically initiated aqueous emulsion polymerization, in which monomers are polymerized in the presence of a N-oxyl radical and by means of special free-radical polymerization initiators at more than 100° C. and at pressures above the vapor pressure of the polymerization mixture.