Process for the bromination of alkyl rubbers

Details Process for the bromination of alkyl rubbers Process for the bromination of alkyl rubbers

C - Chemistry, Metallurgy

08

F

C08F 8/20 (2006.01) B60C 1/00 (2006.01) C08C 19/14 (2006.01) C08F 8/22 (2006.01)

Patent

CA 2161074

C4-C16 alkyl rubbers are brominated by reacting the alkyl rubbers with bromine in the presence of organic azo compounds and/or alkali metal and/or alkaline earth metal hypochlorites and in the presence of linear, branched and/or cyclic alkanes and water at temperatures of 10 to 100°C, optionally under pressure, wherein the quantity of bromine is 0.2 to 1.2 times the molar quantity of double bonds contained in the rubber, 0.1 to 3 times the molar quantity of hypochlorite and/or azo compounds is used relative to the quantity of bromine used, providing that the concentration of the hypochlorites in an aqueous solution is 2 to 20 wt.%, and wherein 5 to 20 wt.% of water, 60 to 90 wt.% of alkanes and 5 to 25 wt.% of alkyl rubber are used relative to 100 wt.% of the total of alkyl rubber, alkanes and water.

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