| abstract |
FIELD: chemistry. n SUBSTANCE: invention relates to a technique of producing cis-1,4-polydienes by polymerising butadiene, isoprene or mixtures thereof in a medium of a hydrocarbon solvent in the presence of a rare-earth element based Ziegler-Natta catalyst. In the final stage of the polymerisation process, an α-olefin and maleic anhydride copolymer is added to the reaction mass in ratio of cis-1,4-polydiene to copolymer of 1:1·10 -4 - 1·10 -1 . n EFFECT: improved properties of cis-1,4-polydienes, cold flow, dynamic viscosity and polydispersity. n 2 tbl, 7 ex |