METHOD OF PRODUCING CIS-1, 4-POLYDIENES

文件类型：PDF文档
文件大小：314K
FIELD : chemistry.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.EFFECT : improved properties of cis-1, 4-polydienes, cold flow, dynamic viscosity and polydispersity.2 tbl, 7 ex