METHOD OF PRODUCING ETHYLENE-PROPYLENE RUBBER Russian patent published in 2010 - IPC C08F210/16 C08F210/18 C08F2/06 C08F4/12 C08F4/20 

FIELD: chemistry.

SUBSTANCE: invention relates to production of synthetic rubber, particularly ethylene-propylene rubber and can be used in petrochemical industry. Method involves copolymerisation of ethylene and propylene in a medium of hydrocarbon solvent in the presence of a cyclic diene comonomer or without it and a catalyst complex based on an organoaluminium compound, vanadium chloride or chloro-oxyvanadium V and a reactivator. During the process, hexachloroparaxylene (HCPX) and a catalyst as a reactivator are simultaneously added to the reaction mixture in a hydrocarbon solvent in such an amount that, molar ratio V:HCPX equals 1:1-1:10.

EFFECT: increased catalyst activity, reduced catalyst consumption, reduced output of cross-linked and branched structures in the ready polymer with retention of its wear resistance.

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