Nitrile rubbers
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United States of America Patent
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Apr 12, 2011
Grant Date -
Nov 27, 2008
app pub date -
Feb 14, 2008
filing date -
May 22, 2007
priority date (Note) -
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Abstract
The present application provides novel nitrile rubbers comprising repeating units of at least one α,β-unsaturated nitrile, at least one conjugated diene and optionally one or more further copolymerizable monomers which nitrile rubbers are distinguished by a specific calcium content as well as a specific chlorine content and dispose of specific thio end groups. Additionally, an improved polymerization and work-up process is provided to produce the aforementioned nitrile rubbers.
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