POLYMERIZATION INHIBITOR COMPOSITION

摘要

A polymerization inhibitor composition for inhibiting the polymerization of aromatic vinyl monomers at elevated temperatures comprising: (a) a benzofuroxan derivative of formula (I) wherein R is C1-C4 alkyl or alkoxy; R1 is a nitro group; and m and n are each independently 0, 1, or 2; and (b) a solvent selected from the group consisting of toluene, xylene, ethylbenzene, vinyltoluene, divinylbenzene, alpha-methylstyrene, and a C12-C18 hydrocarbon. A method for inhibiting the polymerization of aromatic vinyl monomers at elevated temperatures using this composition, is also described.