| 摘要 |
<p>Disclosed herein is a method for inhibiting and retarding the premature polymerizationand the polymer growth of ethylenically unsaturated monomers comprising addingto said monomers an effective amount of at least one inhibitor that is a sulfonatednitrophenol of the formula: (I) wherein: R1, R2, and R3are independently selected from the group consisting of hydrogen, alkyl, NO2,and S03H, provided that at least one of R,, R2, and R3is NO2 and at least one of R1, R2, and R3is SO3H. In a preferred embodiment, at least one additional inhibitorselected from the group consisting of nitroxyl compounds, nitrosoanilines,nitrophenols, amines, and mixtures thereof is also added.</p> |
