FIELD: chemistry.
SUBSTANCE: invention relates to production of highly reactive isobutene homopolymers and copolymers with content of terminal vinylidene double bonds at the end of polyisobutene chains of not less than 50 mol% with respect to separate ends of the chains of polyisobutene macromolecules. An isobutene or isobutene-containing monomer mixture is polymerised in the presence of an active catalyst. The polymerisation catalyst used is a complex of an aluminium trihalide and a donor or a complex of an alkylaluminium halide and a donor. The donor is an organic compound with not less than one ether functional group or a carboxylic ester functional group. Described are isobutene polymers of general formula I 
and formula II 
EFFECT: obtaining highly reactive isobutene homopolymers or copolymers with a narrow molecular weight distribution.
14 cl, 30 ex
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