Disclosed herein is a method for inhibiting the premature polymerization
of ethylenically unsaturated monomers comprising adding to said monomers an effective
amount of:
A) at least one first inhibitor selected from the group consisting of C-nitrosoaniline
compounds; and
B) at least one second inhibitor selected from the group consisting of quinone
alkides, nitroaromatic compounds, hydroxylamine compounds, phenylenediamine compounds,
quinone compounds, and hydroquinone compounds. Also disclosed is a composition
of matter comprising:
A) at least one member selected from the group consisting of C-nitrosoaniline
compounds; and
B) at least one member selected from the group consisting of quinone alkides,
nitroaromatic compounds, hydroxylamine compounds, phenylenediamine compounds, quinone
compounds, and hydroquinone compounds.
