Sulfonated nitrophenols as polymerization inhibitors
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United States of America Patent
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Apr 6, 2010
Grant Date -
Mar 30, 2006
app pub date -
Jun 29, 2005
filing date -
Sep 28, 2004
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Expired
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Abstract
Disclosed herein is a method for inhibiting and retarding the premature polymerization and the polymer growth of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor that is a sulfonated nitrophenol of the formula:wherein:H. In a preferred embodiment, at least one additional inhibitor selected from the group consisting of nitroxyl compounds, nitrosoanilines, nitrophenols, amines, and mixtures thereof is also added.
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