METHOD FOR PRODUCING BRANCHED FUNCTIONALIZED DIENE (CO)POLYMERS

摘要

The invention relates to the field of producing synthetic rubbers, in particular diene (co)polymers, such as polybutadiene, polyisoprene and styrene-butadiene rubber (SBR), which can be used in the production of tyres and industrial rubber articles, in the modification of bitumens, in electrical engineering and in other fields. The method consists in that a polymerization process or a copolymerization process is carried out in two parallel reactors, in each of which dienes are polymerized or copolymerized with each other and/or with arylvinyl compounds, wherein an organolithium initiator, an electron donor additive and a branching agent are fed into the first reactor, and an organolithium initiator, an electron donor additive and a functionalizing agent are fed into the second reactor, and the resultant polymerized mixtures are subsequently mixed with one another. This method makes it possible to produce branched functionalized (co)polymers of dienes that are characterized by a statistical distribution of monomer units, a high content of vinyl units (1,2-butadiene units and/or 3,4-isoprene units (more than 60%)), a narrow molecular mass distribution and a controllable content of branched and functionalized parts in the (co)polymer.