Method for the production of diene rubbers in the gas phase

Details Method for the production of diene rubbers in the gas phase Method for the production of diene rubbers in the gas phase

C - Chemistry, Metallurgy

08

F

C08F 4/44 (2006.01) C08C 19/08 (2006.01) C08F 36/04 (2006.01)

Patent

CA 2173180

Diene rubbers are produced in the gas phase by first polymerising the dienes or diene mixtures in the presence of a catalyst system, which is based on rare earth compounds, at temperatures of from 0 to 150°C and at pressures of from 1 mbar to 50 bar, so that a pourable diene rubber having a Mooney viscosity ML (1 + 4', 100°C) of 70 to 180 Mooney units is obtained, and subsequently subjecting the pourable diene rubber obtained to a chemical or thermal decompo- sition reaction until a Mooney viscosity of 10 to 70 Mooney units is obtained.

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