Uniroyal Chemical Company, Inc.

Crompton Gmbh

Anthony Vincent Gentile

Gerald J Abruscato

Gan Wang

Brigitte Benage

Angela M Edwards

Howard Stephen Friedman

Jesus R Fabian

Anthony Vincent Grossi

Vilen Vilan Kosover

Vilen Kosover

Jesus Fabian

John Matthew DeMassa

Inhibition of polymerization of unsaturated monomers

Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of an inhibitor having the structural formula:

Inhibition of polymerization of ethylenically unsaturated monomers

A polymerization inhibitor composition for inhibiting the polymerization of aromatic vinyl monomers at elevated temperatures comprising: (a) a benzofuroxan derivative of the formula ##STR1## wherein R is C.sub.1 -C.sub.4 alkyl or alkoxy; R.sup.1 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 C.sub.12 -C.sub.18 hydrocarbon, and methods for inhibiting the polymerization of aromatic vinyl monomers at elevated temperatures using this composition.

Composition for inhibiting the polymerization of aromatic vinyl monomers

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Waterbury, CT, United States of America

Anthony Vincent Gentile