abstract |
A phosphorus-free inhibitor composition comprising a) at least one N-oxyl radical and b) a compound of the formula (x) where n is an integer from 0 to 3 and R is C1-C4-alkyl, C2-C4-alkenyl or C7-C10-aralkyl, is described. The inhibitor composition is useful for preventing undesired polymerization of ethylenically unsaturated compounds. |