FIELD: polymer production.
SUBSTANCE: crystalline 1,2-polybutadiene with high crystallinity level is obtained via polymerization of 1,3-butadiene in hydrocarbon solvent using catalytic system containing (i)cobalt salt, (ii) phosphine compound having one branched aliphatic group with 3 or more carbon atoms or one alicyclic group with 3 or more carbon atoms and diphenyl and (iii) methylalumoxane or compound obtained when trialkylaluminum is brought into contact with water.
EFFECT: enabled preparation of 1,2-polybutadiene with high level of vinyl bond and controlled molecule mass.
9 cl, 1 dwg, 3 tbl, 7 ex
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