FIELD: production of block copolymer. SUBSTANCE: polyolefin on the base of one or more aliphatic mono-α-olefins and being metallized by alkaline metal has number-average molecular weight which is equal to 175-250000; it comprises allyl anion being produced on the base of vinylidene group or its derivatives which are displaced in tail monomeric units of polyolefin molecules. Block copolymer is prepared by anionic polymerization which takes place in inert solvent in the presence of initiator. Counterion of alkaline metal is used as said initiator. EFFECT: improved quality of desired product, improved efficiency of the method. 13 cl
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