C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 7/20 (2006.01) C08K 5/00 (2006.01) C08K 5/13 (2006.01) C08K 5/32 (2006.01) C08K 5/42 (2006.01)
Patent
CA 2581573
Disclosed herein is a method for inhibiting and retarding the premature polymerization and the polymer growth of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor that is a sulfonated nitrophenol of the formula: (I) wherein: R1, R2, and R3 are independently selected from the group consisting of hydrogen, alkyl, NO2, and S03H, provided that at least one of R,, R2, and R3 is NO2 and at least one of R1, R2, and R3 is SO3H. In a preferred embodiment, at least one additional inhibitor selected from the group consisting of nitroxyl compounds, nitrosoanilines, nitrophenols, amines, and mixtures thereof is also added.
La présente invention a trait à un procédé pour l'inhibition et le retardement de la polymérisation prématurée et de la croissance de polymères de monomères à insaturation éthylénique comprenant l'addition aux dits monomères d'une quantité efficace d'au moins un inhibiteur qui est un nitrophénol sulfoné de formule (I), dans laquelle: R1. R2, et R3 sont indépendamment choisis parmi le groupe constitué d'hydrogène, d'alkyle, de NO2 et de SO3H, à condition qu'au moins un parmi R1, R2, et R3 est NO2 et au moins un parmi R1, R2, et R3 est SO3H. Dans un mode de réalisation préféré, au moins un inhibiteur additionnel choisi parmi le groupe constitué de composés nitroxyle, de nitrosoanilines, de nitrophénols, d'amines, et de mélange de ceux-ci est ajouté.
Abruscato Gerald J.
Benage Brigitte
Fabian Jesus R.
Kosover Vilen
Lippai Istvan
Chemtura Corporation
Gowling Lafleur Henderson Llp
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