| abstract |
The 1,2-bis-adduct of stable sterically hindered nitroxide compounds substituted with ethylene is prepared by the reaction of an ethylenically unsaturated compound such as styrene or an acrylate ester with a divalent nitrosyl compound. These adducts are highly effective inhibitors for preventing premature polymerization of ethylenically unsaturated monomers when monomers are prepared, purified or stored. |