METHOD FOR PRODUCING CIS-1,4 DIENE RUBBER, CATALYST, RUBBER

摘要

The invention relates to high-molecular compound engineering, in particular to producing stereoregular polidienes by using Ziegler-Natta catalytic systems. The inventive method for producing a cis-1,4 diene rubber, i.e. butadiene and isoprene (co)polymers exhibiting a narrow molecular-mass distribution, is carried out by (co)polymerising diene monomers in a hydrocarbon solvent medium, wherein the diene is embodied in the form of a butadiene, isoprene or the mixtures thereof, in transmitting monomers or the mixtures thereof simultaneously or separately by portions, wherein a catalyst is introduced into a first, along the path, reactor, only, and 1-99 mass % of the monomer total quantity is delivered in the first, along the path, reactor in the form of a charge, and afterwards, 1-99 mass % of the remaining monomer is distributed between the subsequent second and third reactors simultaneously or in each reactor individually. The hydrocarbon solvent is delivered simultaneously and not together with a monomer supplied to the third and subsequent reactors. The catalyst for carrying out said method is produced by interacting compound of rare-earth elements selected from a sequence of lanthanides having 57-71 ordinal numbers in the form of hydrocarbon solutions, conjugated diene monomer, halide-containing compound and aluminium-organic compounds (AOC), including AOC hydride and metal aluminium fine dispersion-containing compounds and, simultaneously, in different combinations, compounds selected from a polyalkylalumoxanes, aluminium hydrides and hydrogen group which make it possible to additionally control the target product molar characteristics.