Process for synthesis of polymer compositions with reduced halogen content, polymer composition with reduced halogen content as well as use of this composition
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United States of America Patent
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Feb 10, 2004
Grant Date -
Dec 12, 2002
app pub date -
May 29, 2001
filing date -
May 29, 2001
priority date (Note) -
Expired
status (Latency Note)
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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.
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