C-nitrosoaniline compounds and their blends as...

C - Chemistry – Metallurgy – 09 – K

Patent

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C09K 15/20 (2006.01) C07B 63/04 (2006.01) C09K 15/30 (2006.01)

Patent

CA 2424580

Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor selected from the group consisting of C-nitrosoaniline and quinone imine compounds. Also disclosed is a composition of matter comprising: A) an ethylenically unsaturated monomer and B) an effective inhibiting amount, sufficient to prevent premature polymerization during distillation or purification of said ethylenically unsaturated monomer, of at least one inhibitor selected from the group consisting of C-nitrosoaniline and quinone imine oxime compounds used together with an effective amount of oxygen or air to enhance the inhibiting activity of said inhibitor.

La présente invention concerne une technique d'inhibition de polymérisation prématurée de monomères éthylèniquement insaturés, qui consiste à ajouter à ces monomères une quantité efficace d'au moins un inhibiteur sélectionné dans le groupe constitué de composés C-nitrosoaniline et quinone imine. Cette invention concerne aussi une composition de matière constituée: (A) d'un monomère éthylèniquement insaturé et (B) d'une quantité inhibitrice efficace, suffisante pour empêcher une polymérisation prématurée pendant la distillation ou la purification de ce monomère éthylèniquement insaturé, d'au moins un inhibiteur sélectionné dans le groupe constitué de composés C- nirosoaniline et quinone amine oxime utilisé avec une quantité efficace d'oxygène ou d'air de façon à renforcer l'activité inhibitrice de cet inhibiteur.

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