FIELD: chemistry.
SUBSTANCE: claimed invention relates to method of obtaining functionalised polymer, which is applied in manufacturing rubber products, such as tire treads. method includes the following stages: (a) application of catalytic system based on lanthanides for polymerisation of one or greater number of polyenes with obtaining active by terminal groups polymer, (b) reaction of said active by terminal groups polymer with polyiso(thio)cyanate with formation of polymer with terminal iso(thio)cyanate functional group, and (c) reaction of said polymer with terminal iso(thio)cyanate functional group with nucleophile, which has one of the following general formulas: H2NR"Si(OR3)3 or HSR"Si(OR3)3, where R" represents substituted or non-substituted divalent aliphatic group, substituted or non-substituted aromatic group or group, which contains heteroatom, and R3 represents hydrogen atom or substituted or non-substituted alkyl, alkenyl, cycloalkyl, cycloalkenyl, aryl, allyl, aralkyl, alkaryl or alkinyl group, to obtain functionalised polymer.
EFFECT: obtaining functionalised polymer, application of which contributes to demonstration by filled compositions for tyre treads of improved wet traction in addition to reduction of hysteresis, as well as increased tensile strength and considerable reduction of Payne effect.
2 cl, 3 tbl, 12 ex
