Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Alex Wegmann0
Dietrich Braun0
Rudolf Pfaendner0
Thomas Wannemacher0
Date of Patent
March 23, 2010
Patent Application Number
10513179
Date Filed
April 24, 2003
Patent Primary Examiner
Patent abstract
The present invention relates to a process and composition for the chain stopping of vinyl chloride polymerization or copolymerization in the presence of a stable free nitroxyl radical and a phenolic antioxidant. A further subject of the invention is the use of a stable free nitroxyl radical together with a phenolic antioxidant as a chain stopping mixture for the vinyl chloride polymerization or copolymerization. A further aspect of the invention is the use of higher sterically hindered nitroxyl radicals alone as chain stopping agents for the vinyl chloride polymerization.
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