METHOD FOR POLYMERIZING CONJUGATED DIOLEFINS (DIENES) WITH RARE EARTH CATALYSTS IN THE PRESENCE OF VINYLAROMATIC SOLVENTS

摘要

Conjugated diolefins, optionally combined with other unsaturated compounds that may be copolymerized with diolefins are polymerized by conducting polymerization of the diolefins in the presence of catalysts based on compounds of rare earth, cyclopentadiene and organoaluminum compounds in the presence of aromatic vinyl compounds as solvents at temperatures ranging fro m - 30 ~C to +100 ~C. The invention provides a simple method for producing copolymer solutions such as styrol-butadiene-copolymers having different styrol content and different contents of 1,2- and cis-units in aromatic viny l compounds in relation to the diolefin, which can be further processed to obtain ABS or HIPS.