CATALYTIC COMPOSITION FOR POLYMERIZATION OF ISOPRENE, METHOD FOR PRODUCING SYNTHETIC POLYIZOPRENE A

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FIELD : chemistry. SUBSTANCE : composition comprises component (a) : a compound of a rare earth element having a bond rare earth element - oxygen, wherein said rare earth element is gadolinium, component (b) : an ionic compound consisting of an anion on the basis of the tetravalent boron cation, selected from the group consisting of a carbonium cation, oxonium cation, ammonium cation, phosphonium cation, cycloheptatrienyl cation and ferrocenium cation, containing a transition metal, and component (c) : at least od a compound selected from the group consisting of compounds represented by the following general formula (X), anda compound having a repeating unit represented by the following general formula (Y) : YR1aR2bR3c … (X); (-Y … (R1) O-), wherein Y is a metal selected from Group 13 of the Periodic Table of the Elements, R1 andR2 are hydrocarbon groups having1 to 10 carbon atoms or hydrogen atoms andR3 is a hydrocarbon group having 1 to 10 carbon atoms, R2 andR3 are the same or different, and a=1, b=1 and c=1. A method for synthetic polyisoprene production, and synthetic polyisoprene are proposed as well. EFFECT : efficient synthesis of high molecular weight polyisoprene. 6 cl, 1 tbl, 6 ex