Copper removal from ATRP products by means of addition of sulfur compounds

US7999066B2 · kind B2 · utility

Assignee

• Evonik Röhm GmbH · DE

Inventors

• Sven Balk · Frankfurt, DE
• Gerd Loehden · Essen, DE
• Christine Miess · Alzenau, DE
• Christine Troemer · Hammersbach, DE
• Monika Maerz · Alzenau, DE

Key dates

• Filing date: Feb 12, 2007
• Grant date: Aug 16, 2011
• Expiry date: Nov 3, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F6/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a precipitation process for removing transition metals from polymer solutions. Specifically, it comprises the removal of transition metal complexes which usually comprise copper from polymer solutions after a completed atom transfer radical polymerization.