FIELD: polymers for production of compositions on the base of polyamides, polycarbonates and polyesters; production of materials having high adhesion to polar substrates. SUBSTANCE: desired copolymers have common formula [A-(E-B-EPOX)]nX where A is vinyl aromatic block (its quantity being 10-50 % of polymer weight), E-B-EPOX is ethylene-butene block (quantity of epoxy group in it being 1-20 weight %), X is cross-linking agent. Average molecular weight of said block polymers is 30000-400000. EFFECT: improved quality of desired product. 7 cl, 6 tbl
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