| 摘要 |
PURPOSE: Provided are methods and compositions for inhibiting styrene monomer polymerization. The composition comprising a bisphenol compound and an oxidized p-phenylenediamine compound may effectively inhibit the undesirable and costly polymerization of vinyl aromatic monomer. CONSTITUTION: Compositions for inhibiting polymerization of vinyl aromatic compounds comprise a bisphenol compound and an oxidized p-phenylenediamine. In a specific, non-limiting embodiment, the polymerization of the vinyl aromatic compound styrene is inhibited by a composition comprising the bisphenol compound 4,4'-methylenebis(2,6-di-tert-butyphenol) and the oxidized p-phenylenediamine compound N-phenyl-N'-methyl-benzoquinonediimide. The bisphenol compound and the oxidized p-phenylenediamine compound have from about a 1:1 to about a 2:1 molar ratio.
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