Process for the production of polyisoolefins

Details Process for the production of polyisoolefins Process for the production of polyisoolefins

C - Chemistry, Metallurgy

08

F

C08F 110/00 (2006.01) C08F 210/10 (2006.01) C08F 210/12 (2006.01) C08F 236/04 (2006.01)

Patent

CA 2155497

Polyisoolefins are produced according to the invention by polymerising isoolefins having 4 to 16 carbon atoms, optionally with conjugated diolefins having 4 to 6 carbon atoms and/or cationically polymerisable, mono- or polyunsaturated, organic compounds having 4 to 16 carbon atoms in the presence of mixtures of carbon dioxide and linear, branched and/or cyclic C4-C8 alkanes and in the presence of catalysts at temperatures of -70°C to +20°C and pressures of 1 to 70 bar, wherein the weight ratio of carbon dioxide to alkanes is 10:90 to 90:10. The process according to the invention largely prevents the formation of fouling on the reactor walls, so ensuring better removal of heat. Moreover, in accordance with the process according to the invention, the polyisoolefins obtained may be directly chemically modified once the carbon dioxide has been removed.

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