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US 5,396,004 AGranted
Compositions and methods for inhibiting vinyl aromatic monomer polymerization
AssigneeBetz Laboratories, Inc.
InventorsGraciela B. Arhancet, Inge K. Henrici
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Abstract
Methods and compositions are provided for inhibiting the polymerization of vinyl aromatic monomers under distillation conditions. The compositions comprise a combination of a phenylenediamine compound and a hydroxylamine compound.
Claims6
A method for inhibiting the polymerization of vinyl aromatic compounds undergoing distillation whereby said polymerization forms soluble polymers in said vinyl aromatic compounds comprising adding to said vinyl aromatic compounds a combination of a phenylenediamine compound and a hydroxyalkylhydroxylamine compound.
Dependencies are inferred from the claim text.