METHOD OF PRODUCING MODIFIED CIS-1,4-POLYISOPRENE Russian patent published in 2014 - IPC C08C19/22 C08F36/08 C08F136/08 C08K3/04 

FIELD: chemistry.

SUBSTANCE: method includes polymerising isoprene in the presence of a catalyst; deactivating the catalyst; stabilising and modifying the polymer with a reaction product of maleic anhydride and N-alkyl-N′-phenyl-n-phenylenediamine in amount of 0.5-2.0 wt % per polymer, followed by degassing and drying the polymer. Before degassing, a solution of industrial diamond carbon is added to the polymerisate in amount of 0.005-0.1 wt % of dry substance with respect to the polymer.

EFFECT: invention raises the polymer decomposition onset temperature, improves cohesive strength of the crude rubber mixture and properties of vulcanisates without changing the standard formula.

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