Disclosed herein is a method for inhibiting the premature polymerization
of ethylenically unsaturated monomers comprising adding to said monomers an effective
amount of at least one inhibitor selected from the group consisting of C-nitrosoaniline
and quinone imine oxime compounds.
Also disclosed is a composition of matter comprising:
- A) an ethylenically unsaturated monomer and
- B) an effective inhibiting amount, sufficient to prevent premature polymerization
during distillation or purification of said ethylenically unsaturated monomer,
of at least one inhibitor selected from the group consisting of C-nitrosoaniline
and quinone imine oxime compounds used together with an effective amount of oxygen
or air to enhance the inhibiting activity of said inhibitor.
