Composition of and method for polysulfides having a reduced...

C - Chemistry – Metallurgy – 07 – C

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C07C 319/26 (2006.01) C07C 321/14 (2006.01)

Patent

CA 2409654

The present invention is directed to a composition that contains polysulfides and that has a reduced odor level and to a method for reducing the odor of polysulfides. The composition contains a polysulfide and an inhibitor that reduces the odor level. The polysulfides include sulfurized olefins prepared by reacting the olefin with sulfur and H2S in the presence of a catalyst. The inhibitors are selected from the group consisting of hydrocarbyl acrylates and hydrocarbyl methacrylates. The method for reducing the odor level of polysulfides involves contacting the polysulfide with an inhibitor selected from the group consisting of hydrocarbyl acrylates and hydrocarbyl methacrylates under conditions that reduce the odor level.

La présente invention concerne une composition qui contient des polysulfures et présente un seuil olfactif réduit, et un procédé qui permet de réduire l'odeur des polysulfures. La composition de l'invention contient un polysulfure, et un inhibiteur qui réduit le seuil olfactif. Les polysulfures comprennent des oléfines sulfurées préparées par réaction de l'oléfine avec du soufre et H2S, en présence d'un catalyseur. Les inhibiteurs sont sélectionnés dans le groupe constitué par des acrylates d'hydrocarbyle et des méthacrylates d'hydrocarbyle. Le procédé de réduction du seuil olfactif des polysulfures consiste à placer les polysulfures au contact d'un inhibiteur sélectionné dans le groupe constitué par des acrylates d'hydrocarbyle et des méthacrylates d'hydrocarbyle, dans des conditions propres à réduire le seuil olfactif.

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