Process for synthesis of polymer compositions with reduced halogen content, polymer composition with reduced halogen content as well as use of this composition

US6689844B2 · kind B2 · utility

Assignee

• RohMax Additives GmbH · DE

Inventors

• Sebastian Roos · Mainz, DE
• Joseph M. Bollinger · North Wales, US
• Markus Scherer · Lebach, DE

Key dates

• Filing date: May 29, 2001
• Grant date: Feb 10, 2004
• Expiry date: May 29, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F8/26
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polymer compositions with reduced living halogen content are used as additive to lubricating oils and are prepared by polymerizing at least one ethylenically unsaturated monomer using a) at least one initiator containing a transferable halogen and b) one or more metal catalysts containing at least one transition metal, in the presence of ligands which can form a coordination compound with the one or more metal catalysts, to obtain a polymer composition having a living halogen content, and after the polymerizing, reacting the polymer composition having a living halogen content with at least one organic nitrogen compound in the presence of a nonpolar solvent, thereby reducing the living halogen content to obtain the polymer composition having a reduced halogen content.