Polymerization inhibitor composition

Details Polymerization inhibitor composition Polymerization inhibitor composition

C - Chemistry, Metallurgy

09

K

C09K 15/30 (2006.01) C07C 7/20 (2006.01) C07C 15/44 (2006.01)

Patent

CA 2250276

A polymerization inhibitor composition for inhibiting the polymerization of aromatic vinyl monomers at elevated temperatures comprising: (a) a benzofuroran derivative of formula (I) wherein R is C1-C4 alkyl or alkoxy; R1 is a nitro group; and m and n are each independently 0, 1, or 2; and (b) a solvent selected from the group consisting of toluene, xylene, ethylbenzene, vinyltoluene, divinylbenzene, alpha-methylstyrene, and a C12-C18 hydrocarbon. A method for inhibiting the polymerization of aromatic vinyl monomers at elevated temperatures using this composition, is also described.

Cette composition inhibitrice de polymérisation, qui sert à inhiber la polymérisation de monomères de vinyle aromatiques à des températures élevées, comprend: (a) un dérivé de benzofuroxane, représenté par la formule (I) où R représente alkyle C1-C4 ou alcoxy; R<1> représente un groupe nitro; et m et n sont chacun séparément 0, 1 ou 2; et (b) un solvant choisi dans le groupe composé de toluène, xylène, éthylbenzène, vinyltoluène, divinylbenzène, alpha-méthylstyrène, et un hydrocarbure C12-C18. Un procédé pour inhiber la polymérisation de monomères de vinyle aromatiques à des températures élevées à l'aide de cette composition est également décrit.

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