FIELD: chemistry.
SUBSTANCE: method involves: polymerisation of a conjugated diene monomer in a liquid-phase polymerisation mixture which contains a conjugated diene monomer, a lanthanide-based catalyst system, dicyclopentadiene or substituted dicyclopentadiene and optionally an organic solvent. If present, the organic solvent is in amount of less than 20 wt % with respect to the total weight of the polymerisation mixture. The polymerisation mixture contains (i) a lanthanide-based catalyst system; (ii) a conjugated diene monomer; (iii) polydiene; and (iv) dicyclopentadiene or substituted dicyclopentadiene, wherein the polymerisation mixture contains less than 20 wt % organic solvent with respect to the total weight of the mixture.
EFFECT: methods and polymerisation mixture prevent uncontrolled reactions in liquid-phase bulk polymerisation.
15 cl, 5 dwg, 1 tbl, 8 ex
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